CN1196771A - Cutting tool holder retention system - Google Patents

Abstract

An excavation cutting tool holder retention system. The cutting tool holder retention system includes a cutting tool holder having a holder engagement surface and a support block having a tool holder bore into which the cutting tool holder is inserted. A pin having a pin engagement surface is movably mounted to the support block such that the pin engagement surface may be moved to engage the holder engagement surface. At least one of the holder and pin engagement surfaces defines an inclined surface such that when the pin engagement surface is moved to engage the holder engagement surface, the shank portion of the cutting tool holder will be drawn into the tool holder bore. In the preferred embodiment, at least one of the cutting tool holder and tool holder bore is tapered such that the cutting tool holder will be drawn and wedged into the tool holder bore of the support block when the pin engagement surface is moved to engage the holder engagement surface.

Description

Tool holder fastening system

This application is a continuation-in-part of co-pending patent application 08/510,451 filed on August 2, 1995 and entitled "Tool Holder Fastening System" by the same applicant.

The present invention relates to digging tools. In particular, the present invention relates to a fastening system for retaining the cartridge of an excavating tool in a seat in use.

Excavating cutter assemblies for applications such as continuous mining or road scoring typically include a cutter (sometimes referred to as a pick) rotatably mounted in a carrier. The stand is in turn mounted, usually by welding, to a cylinder or other object which in turn is driven by suitable power means. When such carriages with knives are mounted on a cylinder and the cylinder is driven, the knives will bite and break up the material that is to be mined or removed. The general workings of such excavators are well known in the art.

Because the mount is exposed, it is subject to wear and misuse, so it must be cut or torched from the cylinder when it becomes unusable and replaced. To prolong the life of the standoffs, tool holders (sometimes referred to as "knife pockets", "pick holders" or "pick pockets") are sometimes used. The tool is mounted rotatably or in different cases releasably in the pick holder, which in turn is mounted in the support by some mechanical connection. This helps protect the bearings from misuse and wear, thereby greatly reducing or eliminating downtime otherwise required for cylinder repairs. The use of such pick holders is well known in the art. For example, US Patent 5,067,775 to D'Angelo describes the use of such a pick holder. In the US5067775 document, the pick holder is referred to as a pocket.

It is well known that such knives and toolholders are subject to significant stress during mining or other work. Ideally, therefore, the toolholder should be mounted on the holder in a manner that minimizes pick seat displacement and maximizes tool life. It is also important that the fit between the tool holder and the standoffs should prevent vibrational loosening which can also lead to premature tool wear and premature failure. In the past, various methods have been proposed or employed in an attempt to maximize tool life while minimizing tool holder displacement or loosely mounting the tool holder within the holder.

For example, US Pat. No. 3,749,449 to Krekeler discloses a support with two upstanding members or prongs forming between said prongs a slot into which a toolholder is embedded. A pin passes through the mount and cartridge and releasably secures the cartridge to the mount. The Krekeler patent relies on the fit between the bottom surface of the cartridge and the upper surface of the seat (at the bottom of the groove) to resist the forces that would cause the cartridge to rotate about the pin. In other words, the Krekeler patent relies on a small clearance fit to dampen the rotation of the tool and cartridge about the pin in use. Otherwise, the movement of the tool holder within the holder will cause unnecessary wear on the tool, tool holder and holder.

As another solution, US Patent 4650254 to Wechner discloses the use of two bolts to connect the tool holder to the support. These two bolts pass horizontally through the rear surface of the standoff and the end of the tool holder. Such a connection may be susceptible to rotational loosening.

It is an object of the present invention to provide an improved toolholder fastening system for excavating tools which allows the toolholder to be securely secured to the support so as to minimize or eliminate any displacement or removal of the toolholder within the support. loose.

In carrying out the above and other objects and features of the present invention, an improved excavating tool holder fastening system results. The improved toolholder fastening system for digging tools includes a toolholder with a toolholder engaging surface and a support with a toolholder mounting hole into which the toolholder is received. A pin with a pin engaging surface is movably mounted on the support so that the pin engaging surface can be moved to engage the cartridge engaging surface. At least one of the cartridge engaging surface and the pin engaging surface defines a ramp such that when the pin engaging surface is moved into engagement with the cartridge engaging surface, the end of said cartridge will be drawn into the cartridge mounting hole.

In another alternative embodiment, a toolholder fastening system for an excavating tool includes a toolholder with a toolholder engaging surface and a toolholder mounting hole with a toolholder inserted therein and a toolholder that intersects the toolholder mounting hole. The support of the support pin hole. The standoff pin hole forms a standoff engagement surface that slopes downward relative to the toolholder mounting hole. A pin engages the abutment engaging surface and the cartridge engaging surface so that the pin is movable to introduce the cartridge into the cartridge mounting hole.

In a preferred embodiment, the mount has a mount pin hole forming the mount engagement surface and sloping downwards. The engagement face of the cartridge is a transverse pin hole. The pin passes through and engages the transverse pin hole of the cartridge. The pin has a shank, a first wedging element and a second wedging element. Each of the first and second wedging parts has a support engaging portion which can be movably engaged with the support pin hole. At least one of the first and second wedging members is movable along the pin relative to the other wedging member, so that the abutment engaging portion of the two wedging members can move along the abutment pin hole and introduce the toolholder into the in the tool holder mounting hole.

In a preferred embodiment, the pin shank has a threaded portion, and one of the first and second wedging members has a wedging threaded hole, so that one of the first and second wedging members can be connected to the pin The rod is threaded and movable relative to the other wedge. Additionally, the first wedging member may have a first straight cylindrical section and a first inclined cylindrical section, and the second wedging member may have a second straight cylindrical section and a second inclined cylindrical section, whereby the first 1. The second straight cylindrical section engages with the transverse pin hole of the tool holder, while the first and second inclined cylindrical sections form the support joint and engage with the support pin hole.

In another more preferred embodiment, the toolholder has a toolholder slot intersecting the transverse pin hole so that it can be removed from the toolholder mounting hole of the abutment by moving the second wedging member relative to the first wedging member. Remove the toolholder from the middle so that the first and second wedging members no longer interfere with the transverse pin holes, and while the first and second wedging members are still movably engaged with the support pin holes, they can be removed from the toolholder mounting holes. out of the tool holder.

In a preferred embodiment, which may be added to all the preceding embodiments, at least one of the cartridge and the cartridge mounting hole is tapered so that when the pin engaging surface is moved into engagement with the cartridge engaging surface , the tool holder can be introduced and wedged into the tool holder mounting hole of the support.

In a further preferred embodiment, which may be added to all the preceding embodiments, the seat has an abutment adjacent the mounting hole of the tool holder and the tool holder has a tool holder shoulder. When the cartridge is introduced into the cartridge mounting hole as described above, the cartridge shoulder will abut against the abutment shoulder.

The present invention also includes an improved excavating tool holder for use with a holder having a holder mounting hole into which the holder is inserted and a pin having a pin engaging surface and movably mounted thereon. The improved toolholder includes an outer wear zone and a tip having a toolholder engaging surface that engages the pin engaging surface. At least one of the cartridge-engaging surface and the pin-engaging surface defines a ramp such that when the pin-engaging surface is moved into engagement with the cartridge-engaging surface, the end of the cartridge is introduced into the cartridge-mounting hole of the carrier.

In an alternative embodiment, a modified toolholder is used in conjunction with a standoff and a pin, wherein the standoff has a toolholder mounting hole into which the toolholder is inserted and a downwardly sloping standoff pin hole, so that Described pin has a pin rod, a first wedging member and a second wedging member, and the second wedging member can move along the pin bar relative to the first wedging member, and the first and second wedging member can be connected with The standoff pin holes are movably engaged. The improved cartridge of this embodiment includes an outer wear zone and an end. The toolholder end has a transverse pin hole that is substantially aligned with the standoff pin hole when the toolholder end is inserted into the toolholder mounting hole so that a pin can pass through the transverse pin hole between the standoff pin holes. The first wedging member and the second wedging member engage the holder pin hole and the transverse pin hole so that moving the second wedging member relative to the first wedging member introduces the end of the toolholder into the toolholder mounting of the holder in the hole.

In a preferred embodiment, the tip has a tool holder slot whereby the tip can be removed from the tool holder mounting hole of the holder by moving the second wedging member relative to the first wedging member, whereby the first and second wedging members The two wedges no longer interfere with the transverse pin hole.

In a more preferred embodiment, the structure of the support pin hole and the wedging member is designed such that the wedging member does not rotate in the support pin hole. This feature creates an alignment and positioning action for accurate and simple assembly of the pin in the holder. This cooperating structure may consist of a pin-slot structure.

The invention also includes a pin for use in conjunction with a holder having a transverse pin hole, and a toolholder having a toolholder mounting hole into which the toolholder is inserted and a toolholder facing towards the transverse pin. Hole slopes downward and intersects a transverse pin hole comprising a pin shank having a first pitch threaded portion and a second pitch threaded portion, a first wedging member and a second wedging member The first wedging member has a first straight cylindrical section, a first inclined cylindrical section and a first wedging threaded hole, and the second wedging member has a second straight cylindrical section, a second inclined the cylindrical section and a second wedging threaded hole, the first wedging member is threaded onto the first pitch threaded portion of the pin shank, and the second wedging member is threaded onto the second pitch threaded portion of the pin shank, Thereby the first and second straight cylindrical sections are engageable with the transverse pin holes and the first and second inclined cylindrical sections are engageable with the standoff pin holes.

The advantages brought by the present invention are many. For example, since one of the tool holder engaging surface and the pin engaging surface constitutes an inclined surface, the tool holder can be formed into a particularly close fitting relationship with the tool holder mounting hole. This tight fit is particularly reliable if either or both the end of the toolholder or the toolholder mounting hole are tapered so that the end of the toolholder is wedged into the toolholder mounting hole when the part is assembled with a pin . The firmness of the fit is also increased if the cartridge has a cartridge shoulder which abuts against an abutment of a seat when the cartridge is introduced into the cartridge mounting hole. Another advantage of the present invention is that the toolholder mounting hole of the stand can be shaped to completely surround the toolholder and support the toolholder in multiple directions. As a further advantage, when the cartridge is worn, the cartridge can be easily removed and replaced by simply loosening the pin.

Other objects and advantages of the present invention will become apparent from the following description and with reference to the accompanying drawings in which preferred embodiments of the invention are clearly shown.

While various embodiments of the invention have been shown, the specific embodiments shown should not be considered as limiting the claims. It is anticipated that various modifications and substitutions may be made without departing from the scope of the present invention.

Fig. 1 is a side view showing a support, a tool holder sleeve and a tool according to an embodiment of the present invention;

Fig. 2 is a sectional view along the plane indicated by line 2-2 in Fig. 1, the left half shows the present invention in a loosened state, and the right half shows the present invention in a tightened state;

Figure 3 is a sectional view showing an alternative pin;

Figure 4 is a side view showing an alternative embodiment of the present invention, a holder, a toolholder, and a tool;

Fig. 5 is a sectional view along the plane shown by line 5-5 in Fig. 4;

Fig. 6 is a sectional view along the plane shown by line 6-6 in Fig. 4;

Figure 7 is a side view showing the support, tool holder and cutter of another alternative embodiment of the present invention;

Fig. 8 is a sectional view along the plane indicated by line 8-8 in Fig. 7, the left half shows the present invention in a loosened state, and the right half shows the present invention in a tightened state;

Figure 9 is a side view of the end of the tool holder;

Figure 10 is a side view of a threaded pin;

Figure 11 is a side view of the first wedging member; and

Figure 12 is a side view of the second wedging member.

One embodiment of a toolholder fastening system 10 is shown in FIGS. 1 and 2 . The tool holder fastening system 10 includes a support 12 and a tool holder 14 coupled to the support 12 by a pin 16 . In the illustrated embodiment, the tool 18 is rotatably and releasably mounted in the tool holder 14 . However, the scope of the present invention is intended to cover tool holder fastening systems in which the tool is non-rotatably mounted.

In application, such supports 12 may be distributed and fixed in any desired form, such as by welding, on the circumference or length of a cylinder or other object (not shown). The cylinder or other object may be driven by any conventional and suitable power means to cause the knives 18 to cut into and break up the material on which they are acting. Such uses are well known in the art and therefore will not be described in detail here.

Knife 18 generally has an elongated body. The tip 22 of the cutter 18 generally includes a hard cutting insert 24 mounted on a generally tapered outer portion 26 . This hard cutting insert 24 may be made of cemented tungsten carbide or any other suitable material. The hard cutting insert 24 is typically mounted on the end of the tapered outer portion 26 where the hard cutting insert 24 may be brazed or otherwise suitably secured in place. The knife 18 also includes a shank 28 adjacent a shoulder 30 of the tapered outer portion 26 . Since such knives are well known in the art, no further detailed description is required here.

Cartridges can have many different shapes. The cartridge 14 shown in this embodiment has an outer wear zone 32 and an end 34 connected to a shoulder 36 of the cartridge. A tool mounting hole 38 into which the tool 18 is rotatably or otherwise received is formed in the tool holder 14 . Such rotatable or non-rotatable mountings are well known in the art and so will not be described in detail here.

While the end 34 of the cartridge 14 may have a different shape, the illustrated end 34 of the cartridge is tapered. The end 34 can be made of solid material, or it can have a cavity such as a vertical hole 44 as shown. The end 34 of the tool holder also has a tool holder engaging notch which in this embodiment comprises a transverse pin aligned along the axis indicated by "A" and intersecting the central axis "B" of the end 34 Hole 46. The transverse pin hole 46 is tapered. The holder engaging recess has a cartridge engaging surface 48 which in this embodiment is the lower sloped surface of the tapered transverse pin hole 46 .

The support 12 generally has a toolholder mounting hole 54 surrounded by an abutment 56 . In the preferred embodiment, the toolholder mounting hole 54 is tapered to match the taper of the end 34 of the toolholder 14 . It has been found that the maximum total internal cone angle should preferably be about 16 degrees.

The support 12 also has a side 58 and a bottom 60 which may be mounted to a cylinder or other object (not shown) by welding or any other suitable means.

The tool holder mounting holes 54 and thus the tool holder 14 and the tool 18 are generally arranged along the moving direction of the tool 18 (shown as the direction “C” in FIG. 1 ).

To carry out the present invention, the carrier 12 has carrier pin holes 62 aligned transversely along the axis indicated by "D" and perpendicular to the central axis "B" of the toolholder mounting hole 54 .

In the illustrated embodiment, the standoff pin hole 62 has a standoff threaded portion 64 extending from the side 58 to the toolholder mounting hole 54 . An annular groove 66 in which an O-ring 68 is received can optionally be provided at the end of the threaded portion.

The pin 16 is movably mounted on the support 12 . In this embodiment of the invention, the pin 16 is removably mounted via a threaded standoff engagement 70 . The threaded standoff engagement portion 70 of the pin 16 is designed to be threadably engageable with the threaded portion 64 of the standoff pin hole 62 of the standoff 12 . The pin 16 also has a pin engaging surface 72 which in this embodiment is tapered to create a ramp 74 for engagement with the cartridge engaging surface 48 of the cartridge engaging recess 46 .

The pin 16 also has a fastening end 76 . Fastening end 76 preferably has, for example, a non-circular shape and has a protrusion or a receptacle in which a tool can be used to fasten pin 16 in support pin hole 62 as described below. In the illustrated embodiment, the fastening end formation includes a hexagonal receptacle 78 for receiving a hexagonal screw head wrench.

Although the pin 16 may be made of any suitable material, alloy steel such as SAE4140, SAE4340 is preferred.

Although two pins 16 are shown used in the described embodiment, one or more pins could be used. Regardless of how many pins are used, the axis of the transverse pin hole 46 and thus the standoff pin hole 62 need not intersect the tool mounting hole 38 perpendicularly. Conversely, the transverse pinholes and standoff pinholes can be angled relative to the tool mounting hole 38, preferably 70-90 degrees downward from the standoff side 58 toward the central axis "E" of the toolholder 14. Additionally, if two or more pins are used, the axes of the transverse pin holes and thus the support pin holes need neither be aligned laterally nor intersect.

In order to apply the embodiment of the invention shown in FIGS. 1 and 2, the end 34 of the tool holder 14 is inserted into the tool holder mounting hole 54 of the support 12 so that the transverse pin hole 46 of the tool holder 14 and the support of the support 12 The socket pin holes 62 are generally aligned.

Next, the pin 16 is inserted into the standoff pin hole 62 . At this point, the transverse pin holes 46 and standoff pin holes 62 are still roughly aligned as indicated by axes "A" and "D" shown in the left half of FIG. At this time, it is also preferable to leave a small gap between the toolholder shoulder 36 and the abutment 56 of the support 12 as shown in the left half of FIG. 2 .

The pin 16 is then moved such that the ramp 74 of the pin engaging face 72 will engage the cartridge engaging face 48 of the cartridge 14 . This movement of the pin 16 is accomplished with the fastening end 76 of the pin 16 engaged with a tool or other device (not shown) so that the threaded abutment of the pin 16 in the threaded portion 64 of the abutment pin hole 62 The seat joint 74 is screwed. Nylok(R) manufactured by Nylok Fastener Company or any other suitable material or adhesive may be used to help prevent the pin 16 from dislodging from the standoff pin hole 62 in use.

Since at least one (in this case, both) of the tool holder engaging surface 48 and the pin engaging surface 72 forms a bevel, the end 34 of the tool holder 14 will be forced downwardly into the seat 12 in the direction "E". The tool holder mounting hole 54 is wedged tightly to form a tight fit until the tool holder shoulder 36 is pressed against the shoulder 56 . At this point, in the illustrated embodiment, the axis "A" of the transverse pin hole 46 and the axis "D" of the standoff pin hole 62 will substantially coincide as shown in the right half of FIG. 2 . To achieve this effect, the cartridge engaging surface 48 and the pin engaging surface 72 preferably each have a maximum total internal angle equal to approximately 16 degrees. As shown on the right side of FIG. 2 , due to the mating taper of the cartridge end 34 and the cartridge mounting hole 54 , the resulting fit is particularly secure.

Thus, the tight fit formed and the abutment of the cartridge shoulder 36 against the seat abutment 56 advantageously prevents rotation of the cartridge about the axis “D” of the pin 16 . The wedging action between the cartridge engaging surface 48 and the pin engaging surface 72 together with the wedging between the cartridge end 34 and the cartridge mounting hole 54 will also minimize looseness due to rotation. As a further advantage, when the cartridge is worn, the cartridge can be easily removed and replaced by simply loosening the pin 16 .

A sectional view 3 similar to FIG. 2 shows an alternative embodiment of the invention. This embodiment is very similar to the toolholder fastening system 10 shown in FIGS. 1 and 2 . Accordingly, identical parts are designated with identical reference numerals followed by an apostrophe. The main difference is the pin 100 , which in this embodiment includes a screw or bolt 102 , a wedge 104 and a cone 106 . Wedge 104 has tapered end 108 , a cylindrical section 110 , a tool-action end 112 and a threaded throughbore 114 . The tool active end 112 preferably has a non-circular like configuration and has a protrusion or a receptacle whereby the tool can be used to hold the wedge 104 in a fixed position while the screw or bolt 102 is tightened. In the illustrated embodiment, the tool active end 112 has a hex nut configuration designated for engagement by a wrench.

Tapered member 106 has a tapered end 116 , a cylindrical end 118 and an optical aperture 120 . The outer surfaces of the tapered ends 108 and 116 form pin engaging surfaces 122 and 124, respectively, which are beveled by the tapering of the tapered ends 108 and 116 to engage the tool holder engaging surface 48' of the pin hole 46'. join. Pin engaging surfaces 122, 124 and engaging surface 48' preferably have a maximum total interior angle equal to approximately 16 degrees.

Screw or bolt 102 has a threaded rod 126 and a head 128 that is preferably non-circular in shape and has a protrusion or socket, whereby a tool can be used to tighten screw or bolt 102 relative to wedge 104 . In the illustrated embodiment, the head 128 may be shaped, for example, hexagonally shaped to be engaged by a suitable wrench.

This alternative embodiment also differs from the embodiment shown in Figures 1 and 2 in that the seat 12' of this embodiment has a non-threaded but plain walled seat pin hole 130 to slidably accommodate the wedge. The cylindrical section 110 of the tightening member 104 and the cylindrical end 118 of the conical member 106 .

The application of this embodiment is similar to that of the embodiment shown in FIGS. 1 and 2 . First, insert the end 34' of the tool holder 14' into the tool holder mounting hole 54' of the support 12' so that the transverse pin hole 46' of the tool holder 14' and the support pin hole 62' of the support 12' are approximately alignment. At this point, it is preferable to leave a small gap between the cartridge shoulder 36' and the abutment 56' of the carrier 12'. Next, the threaded rod or bolt 102, which has been slid on the threaded rod 126 with the tapered member 106, is passed through the support pin hole 62' and the transverse pin hole 46'. Wedge 104 is then threaded onto threaded rod 126 so that pin engagement surfaces 122 and 124 will engage engagement surface 48' of toolholder 14'. Since at least one of the toolholder engaging surface 48' and the pin engaging surfaces 122, 124 (in this case both surfaces) form a slope, the end 34' of the toolholder 14' will be downward in direction "G". It is wedged with the main bore 54' of the support 12' to form a tight fit until the cartridge shoulder 36' abuts against the abutment shoulder 56' as shown in FIG. 3 . To achieve this, the cartridge engaging surface 48' and the pin engaging surfaces 122, 124 preferably have a maximum total internal angle equal to approximately 16 degrees.

Another alternative embodiment of a toolholder fastening system 200 is shown in FIGS. 4-6 . The toolholder fastening system 200 includes a holder 202 with a main bore 204 , a toolholder 206 with a toolholder end 208 and pin 210 . A knife 212 is rotatably mounted within the tool holder 206 . Although the geometry of the toolholder 206 and seat 202 varies, this embodiment is similar to that shown in FIGS. The axis "H" of the axis "I" of the end 208 of the clip 206. Instead, as clearly shown in FIG. 5 , the axes "H" of the two pins 210 are inclined at an angle.

Cartridge 206 in this embodiment is generally symmetrical about axis “I” and includes an outer wear zone 214 and a cartridge shoulder 216 . The tool holder 206 defines a tool mounting aperture 218 into which the tool 212 is rotatably and releasably received. As shown in this embodiment, an annular locking groove 220 is formed in the tool mounting hole 218 . The knife 212 shown in this embodiment has a shank 222 defining a shank ring groove 224 adapted to receive a split collar 226 with a protrusion 228 . The handle 222 is rotatably mounted in the tool installation hole 218 through the protrusion 228 of the open collar 226 , and the protrusion is embedded in the annular groove 220 of the tool installation hole 218 . Such mounting is described in US Patent 3,519,309 to Engle et al. and is also known in the art.

As an alternative, the tool 212 is rotatably mounted in the tool mounting hole 218 in a manner filed on August 2, 1995, inventor Ted Richard Marseille, U.S.S.N 08/510160 , and is disclosed in a pending application entitled "Cutting Tool Fastening System."

The end 208 of the tool holder 206 of this embodiment includes a generally cylindrical portion 230 and an upper sloped section 232 proximate the shoulder 216 . Cartridge end 208 also has a cartridge engagement notch, which in this embodiment includes an angled cartridge pin hole 234 whose axis intersects central axis “I” of cartridge end 208 . The cartridge engaging recess has a cartridge engaging surface 236 which, in the illustrated embodiment, is a downwardly sloped surface defined by the slope of the tapered cartridge pin hole 234 .

The support 202 has a shoulder 238 . An inclined standoff pin hole 240 is formed in the standoff, the center axis "H" of which pinhole intersects the center axis "I" of the main bore 204 of standoff 202 . The angled standoff pin holes 240 are threaded in this embodiment. To provide machining clearance for the pin 210, as shown in FIG. 6, the axes "H" of the two standoff pin holes 240 intersect at an angle, which in this embodiment is 90 degrees. Of course, the axes of the two support pin holes 240 may intersect at any given angle, such as at an acute angle or not at all.

Pin 210 has the same structure as pin 16 described with respect to the embodiment shown in FIGS. 1 and 2 . Thus, the pin 210 has a tapered pin engaging face 242 to provide a ramp to engage the cartridge engaging notch, ie, the cartridge engaging face 236 of the tapered cartridge pin hole 234 shown in this embodiment. Similar to the embodiment shown in FIGS. 1 and 2 , the pin 210 is inserted into the angled standoff pin hole 240 after approximately aligning with the angled toolholder pin hole 234 . At this point, it is desirable to leave a small gap between the cartridge shoulder 216 and the abutment 238 of the holder 202 .

Next, the pin 210 is threaded, whereby the pin engaging surface 242 will engage the cartridge engaging surface 236 of the cartridge 206 . Since at least one of the tool holder engaging surface 236 and the pin engaging surface 242 (in this case, these two surfaces) constitutes an inclined plane, the tapered portion 232 of the tool holder 206 end 208 will be wedged downward against the The main bore 204 of the carrier 202 forms a tight fit until the cartridge shoulder 216 abuts against the abutment 238 of the carrier 202 as shown in FIG. 5 . To achieve this result, the cartridge engaging surface 236 and the pin engaging surface 242 preferably have a maximum total interior angle equal to approximately 16 degrees. Not only does this result in a tight fit similar to the embodiment shown in Figures 1 and 2, but because pin 210 is tilted along axis "H", a portion of the load carried by pin 208 will be spread axially along pin 208, ultimately resulting in a stronger connect.

The pin 208 is preferably disposed at an angle approximately equal to 70-90 degrees relative to the axis "I" of the main bore 204 of the support 202, although any angle may be used. It is also preferred that the pin 208 slope downwardly from the surface of the seat 202 toward the axis "I" of the toolholder 214, as shown in FIG. Although the axis "H" of the pin 210 and the axis of the standoff pin hole 240 preferably intersect at the central axis "I" of the main hole 204, many other arrangements are possible and are included within the scope of the present invention. Inside. Additionally, although two pins 210 are shown, one or more pins may be used.

Yet another alternative embodiment of a toolholder fastening system 300 is shown in FIGS. 7-12 . The toolholder fastening system 300 includes a holder 302 with a holder mounting hole 304 and holder pin hole 306 , a holder 308 with an end 310 and a pin 312 . A knife 314 is rotatably mounted within the tool holder 308 . Although the geometry of the tool holder 308, holder 302 and tool 314 can vary without limitation, this embodiment is similar to that shown in FIGS. The standoff pin hole 306 and the pin 312 of the seat 302 are different. Accordingly, only those components of the modified toolholder fastening system 300 are described in detail for this implementation.

Cartridge 308 generally has an outer wear zone 315 joined to cartridge end 310 at cartridge shoulder 316 . While the end 310 of the cartridge 308 can have a different shape, the cartridge end 310 shown in Figures 7, 8 and 9 is tapered along the central axis "I". Cartridge end 310 may be constructed of solid material, or, as shown in FIG. 8, may have a cavity such as vertical bore 317. Cartridge end 310 also has a cartridge engaging notch, which in this embodiment includes a transverse pin hole 318 . The transverse pin hole 318 in this embodiment is cylindrical and is aligned along a central axis indicated by "J", and the transverse pin hole 318 preferably intersects the central axis "I" of the toolholder end 310. The tool holder engaging recess has a tool holder engaging surface 320, which in this embodiment is the surface defined by the transverse pin hole 318, especially when locking the tool holder 308, the above-mentioned engaging surface is the lower surface, when loosened. When the knife clip 308 is used, the above-mentioned joint surface is the upper surface.

As best seen in FIGS. 7 and 8 , the pin hole 318 also defines a pin hole slot 319 along a lower surface of the pin hole 318 . The pin hole groove 319 in this embodiment is semi-cylindrical. A cylindrical bayonet pin 321 is located in the pin hole slot 319 . The detent 321 may be press-fitted into the pinhole slot 319, in which case the pinhole slot 319 will have a cross-section slightly larger than a semicircle, or by any suitable fixing means such as butt welds or rings. An epoxy adhesive holds the bayonet in place. Detent 321 may be made of any suitable material such as 521000 steel.

As best seen in FIG. 9 , the cartridge end 310 also defines a cartridge slot 322 whose two vertical walls 324 intersect the transverse pin hole 318 . Additionally, the cartridge end 310 delimits a gripping groove 326 having vertical groove walls 327 .

As shown in FIGS. 7 and 8 , the tool holder mounting hole 304 of the support 302 may be partially surrounded by an abutment 328 , but more commonly is completely surrounded by the abutment 328 . The toolholder mounting hole 304 of this embodiment has a toolholder mounting hole center axis "I" which coincides with the axis "I" of the end 310 of the toolholder 308 when the parts are assembled as shown. Additionally, the standoff 302 has standoff pinholes 330 that are cylindrical and aligned along the standoff pinhole axis shown as "K". As shown in FIG. 8, the standoff pin hole axis "K" intersects the axis "J" of the transverse pin hole 318 at an angle "L". The standoff pin hole 330 has a standoff engagement surface 332, which in the illustrated embodiment is the surface defined by the standoff pin hole 330, particularly the upper surface when the toolholder 308 is locked, When the tool holder 308 is released, the above-mentioned engagement surface is the lower surface. As shown in FIG. 8 , the standoff engagement surface 332 and standoff pin hole 330 with axis “K” in this embodiment is sloped downward relative to the toolholder mounting hole 304 .

As shown in FIGS. 8 and 10-12 , the pin 312 includes a pin rod 340 , a first wedging member 342 and a second wedging member 344 assembled along a central axis "J". The pin shaft 340 in this embodiment has a first pitch threaded portion 346 , a polished shaft portion 348 and a second pitch threaded portion 350 . Although not shown, the pin rod need not have a polished rod portion. Additionally, although the first pitch threaded portion 346 is shown as a left-handed threaded portion and the second pitched threaded portion 350 is shown as a right-handed threaded portion, they may not be so designed. Instead, the pin shank (if threaded) could have threaded portions that are both left-handed or right-handed, but with different pitches. Although the threads may be formed in any suitable manner, as shown in FIG. 4, the first pitch threaded portion 346 and the second pitch threaded portion 350 may be cold rolled. The pin 340 may also have a mating structure 352 which in this embodiment forms a hexagonal recess centered along the axis "J" of the pin 340 .

As shown in FIG. 11, the first wedging member 342 has a straight cylindrical section 356 aligned along the axis "J", the outer end of which has a chamfer 358 preferably at 45 degrees relative to the axis "J". Adjacent said inclined cylindrical section 356 at clamping shoulder 360 is an inclined cylindrical section 362 whose central axis "K" is disposed at an angle "L" with respect to axis "J".

Also defined in the first wedging member 342 is a wedging threaded hole 364 which, in the illustrated embodiment, is a left-handed thread machined to engage the first pitch threaded portion 346 of the pin 340. hole.

The first wedging member 342 also defines a matching groove 365 along the lower surface of the inclined cylindrical section 362 . In this embodiment, the fitting groove 365 has a semi-cylindrical configuration for fitting with the pin 321 as will be described in detail below.

The pin 321 has a pin engaging surface 366 . In the illustrated embodiment, the pin engaging surface 366 has a cartridge engaging portion 368 and a seat engaging portion 370 . In this embodiment, the tool holder interface 368 is the outer surface of the straightening cylindrical section 356, specifically, when locked, it is the lower surface of the straightening cylindrical section, and when released, it is the outer surface of the straightening cylindrical section. upper surface. Seat engagement surface 370 is the outer surface of angled cylindrical section 362, in particular, when locked, it is the upper surface of the angled cylindrical section, and when released, it is the lower surface of the angled cylindrical section.

As shown in FIG. 12 , the second wedging member 344 is a mirror image copy of the first wedging member 342 . Just like the first wedging member 342, the second wedging member 344 has a straight cylindrical section 356', a chamfer 358', a clamping shoulder 360', an inclined cylindrical section 362', a wedging thread Bore 364 ', and a pin engaging surface 366 ' comprising a tool holder engaging portion 368 ' and a seat engaging portion 370 ', the wedge threaded hole 364 ' in the illustrated embodiment has a right-handed thread, so that the threaded pin Second pitch threaded portion 350 of rod 340 . Also similar to the first wedging member 342 is that the axis "K" of the inclined cylindrical section 362' of the second wedging member 344 is inclined at an angle "L" relative to the central axis "J" of the straight cylindrical section 356'. ".

Similar to the pin 340, although the first wedging member 342 is shown as having a left-handed threaded wedging hole 364 and the second wedging member 344 has a right-handed threaded wedging hole 364, such a configuration is not required. The wedging threaded holes of the first wedging member 342 and the second wedging member 344 need only have different pitches as long as the first pitch threaded portion 346 and the second pitch threaded portion 350 of the pin 340 are threadedly engaged.

In order to apply the embodiment of the invention shown in FIGS. 7-12, a first wedging member 342 or a second wedging member 344 is partially screwed to the first pitch threaded portion 346 or the second pitch threaded portion 350 of the pin 340, respectively. superior. Next, insert the pin rod 340 into the support pin hole 306 together with the first wedging member 342 or the second wedging member 344, thereby roughly aligning the matching groove 365 of the first wedging member 342 or the second wedging member 344 The mating groove 365 ′ of the support pin hole 306 is aligned with the mating pin 321 of one of the standoff pin holes 306 .

Subsequently, the other of the second wedging member 344 or the first wedging member 342 is screwed onto the other of the second pitch threaded portion 350 or the first pitch threaded portion 346 of the pin 340 until the second wedging The matching groove 365 ′ of the member 344 or the matching groove 365 of the first wedging member 342 is roughly aligned with the other matching pin 321 in the support pin hole 306 .

A suitable tool may then be used to engage the mating structure 352 of the pin 340 and rotate the pin 340 appropriately whereby the first wedging member 342 and the second wedging member 344 will be drawn towards each other. At the same time, the first wedging member 342 and the second wedging member 344 must remain in place until the mating slots 365 , 365 ′ engage the mating pin 321 . As shown in the left half of FIG. 8 , the pin 340 can be driven to rotate until the inclined cylindrical section 362 of the first wedging member 342 and the inclined cylindrical section 362 ′ of the second wedging member 344 are partially located in the pin hole 306 of the seat. so far.

Next, the end 310 of the cartridge 308 may be inserted into the cartridge mounting hole 304 of the standoff 302 such that the pin 340 will slide through the cartridge slot 322 into the transverse pin hole 318 of the cartridge end 310 .

At this time, as shown in the left half of FIG. 8 , the end 310 of the toolholder 308 is loosely fitted into the toolholder mounting hole 304 of the support 302 .

A suitable tool is then used to engage the mating structure 352 of the pin 340 and rotate the pin 240 appropriately whereby the first wedging member 342 and the second wedging member 344 will be drawn towards each other. As the first wedging member 342 and the second wedging member 344 are drawn towards each other, the straightening cylinder of the first wedging member 342 is forced with the help of the chamfers 358, 358' on the ends of the wedging members. Segment 356 and aligned cylindrical segment 356 ′ of second wedge member 344 enter transverse pin hole 318 . At the same time, the rotation of the pin 340 will cause the seat engaging portions 370 and 370' of the pin engaging surfaces 366 and 366' of the inclined cylindrical sections 362 and 362' to move along the seat engaging surfaces 332 of the seat pin hole 330 and engage with engagement so that the wedge will move in direction "M" as shown in Figure 8. At this point, the cartridge engaging portion 368, 368' of the pin engaging surface 366, 366' of the wedge member 342, 344 will engage the cartridge engaging surface 320 of the cartridge end 310, thereby moving along the Direction "N" forcibly wedges the end 310 of the tool holder 308 into a tight fit with the tool holder mounting hole 304 of the standoff 302 until the tool holder shoulder 316 rests against the abutment as shown in the right half of FIG. Section 328 onwards. As shown in the right half of FIG. 8 , the clamping shoulder 360 can then protrude into the clamping groove 326 of the tool holder end 310 .

The diameter of the transverse pin hole 318 of the tool holder end 310 is 1.000-1.001 inches, the size of the tool holder groove 322 between the vertical groove walls 324 is 0.627-0.630 inches, and the diameter of the support pin hole 306 is 1.124-12125 inches and in The angle "L" is set at 5 degrees ± 10 minutes - 8 degrees ± 10 minutes, the straight cylindrical section 356, 356' of the wedge 342, 344 has a diameter of 0.998-0.999 inches, and the inclined cylindrical section 362 of the wedge , 362' has a diameter of 1.122-1.123 inches and is set at an angle of 5 degrees ± 10 minutes-8 degrees ± 10 minutes so as to match the angle of the support pin hole 306, and the wedge threaded hole 364 forms a 37/64 inch Through holes and tapped with 5/8-24 inch left-handed or right-handed thread, the diameter of the polished rod portion 348 of the pin rod 340 is 0.54 inches, while the first pitch threaded portion 346 and the second pitch threaded portion 350 are tapped with 5/8 - 24 inches left or right hand thread. At this point the toolholder fastening system 300 shown in FIGS. 7-12 will work satisfactorily. All components may be made of any suitable grade of steel such as 4140 steel (HRC38-43).

^Nylok® produced by Nylok Fastener Company or any other suitable material or adhesive may be used to help prevent rotation of the pin 340 in use and prevent loosening of the first wedging member 342 and the second wedging member 344 .

When it is necessary to replace the toolholder 318 , simply reversely rotate the pin 340 through the engaging structure 352 until the toolholder end 310 can be removed from the toolholder mounting hole 304 and the pin 40 through the toolholder slot 322 . As shown in the left half of Figure 8, it is not necessary to remove the first wedging member 342 and the second wedging member 344 from the pin rod 340 for the tool holder 318 to be taken out and to make the mating grooves 365, 365' and the mating pin 321 disengage.

An advantage of this embodiment is that the mating cylindrical surfaces of the transverse pin holes 318 and the straight cylindrical sections 356, 356' of the wedge members 342, 344 are aligned with the support pin holes 330 and the corresponding inclined cylindrical sections 362 of the wedge members. The mating cylindrical surfaces of , 362' together form a good contact relationship between the mating surfaces, thereby reducing contact stress. Additionally, since the pin 340 moves in direction "M" as the toolholder fastening system 300 is tightened, a locking effect is created, thereby securing the fastening system and helping to prevent unwanted loosening. Similarly, when the lock is released, the pin translates in the opposite direction of "N", which imparts a shock-free movement to the cartridge 308 for easier release of the cartridge. Another advantage is that the cartridge slot 322 in the cartridge end 310 allows the cartridge 308 to be replaced without removing any pins or bolts from the holder 302 . Finally, the advantage of this embodiment is that, without the use of tapered parts, no special tools are required and manufacturing costs are reduced.

See the full texts of the patents and patent applications cited herein, which are incorporated by the present invention.

Although particular embodiments of the present invention have been described and shown, it will be apparent to those skilled in the art that various modifications and substitutions can be made without departing from the invention. The following claims are intended to cover all modifications and equivalents which fall within the spirit of the invention.

Claims (55)

1. A toolholder fastening system for an excavating tool, comprising: a toolholder with a toolholder engagement surface; a support with a toolholder mounting hole into which the toolholder is inserted; and a toolholder with a pin a pin of the engagement surface, said pin being movably mounted on the support so that the pin engagement surface is movable for engagement with the toolholder engagement surface, at least one of the toolholder engagement surface and the pin engagement surface defining a ramp such that when the As the pin engaging surface moves to engage the cartridge engaging surface, the cartridge will be drawn into the cartridge mounting hole. 2. The toolholder fastening system for an excavating tool as claimed in claim 1, wherein the pin is threadably mountable to the abutment such that the pin engagement surface is helically displaceable into engagement with the toolholder engagement surface. 3. The toolholder fastening system for an excavating tool of claim 1, wherein at least one of the toolholder engaging surface and the pin engaging surface is generally tapered. 4. The toolholder fastening system for excavating tools as claimed in claim 1, wherein the support has a shoulder and the toolholder has a toolholder shoulder so that when the toolholder is introduced into the toolholder mounting hole In neutral, the abutment will rest against the shoulder of the tool holder. 5. The toolholder fastening system for an excavating tool of claim 1, wherein at least one of the toolholder and the toolholder mounting hole is tapered such that when the pin engaging surface is moved to engage the toolholder Face engagement to allow the cartridge to be wedged into the cartridge mounting hole of the standoff when the cartridge is introduced into the cartridge mounting hole. 6. The tool holder fastening system for excavating tools as claimed in claim 5, wherein the support has a shoulder and the tool holder has a tool holder shoulder, whereby when the tool holder is introduced into the tool holder mounting hole In neutral, the abutment will rest against the shoulder of the tool holder. 7. A cartridge fastening system for an excavating tool comprising: a cartridge having a cartridge engaging surface and an end; a holder having a cartridge mounting hole into which the end of the cartridge is inserted; and a pin with a pin engaging surface movably mounted on the support so that the pin engaging surface can be moved to engage with the tool holder engaging surface, at least one of the tool holder engaging surface and the pin engaging surface defines a and at least one of the toolholder end and the toolholder mounting hole is tapered so that when the pin engaging surface moves to engage the toolholder engaging surface, the end of said toolholder will be introduced and wedged into the seat in the tool holder mounting hole. 8. The toolholder fastening system for an excavating tool of claim 5, wherein the pin is threadably mountable to the abutment whereby the pin engaging surface is helically movable to engage the toolholder engaging surface. 9. The toolholder fastening system for an excavating tool of claim 5, wherein at least one of the toolholder engaging surface and the pin engaging surface is generally tapered. 10. The toolholder fastening system for an excavating tool as claimed in claim 7, wherein the seat has an abutment and the toolholder has a toolholder shoulder whereby when the end of the toolholder is introduced into the toolholder When installed in the hole, the abutment will rest against the shoulder of the cartridge. 11. A toolholder fastening system for an excavating tool, comprising: a toolholder with an end having a toolholder engaging surface; a support having a toolholder mounting hole into which the tip of the toolholder is inserted and a pin with a pin engaging surface movably mounted on the support so that the pin engaging surface can be moved to engage with the tool holder engaging surface, at least one of the tool holder engaging surface and the pin engaging surface A ramp is defined so that when the pin engaging surface is moved into engagement with the cartridge engaging surface, the end of the cartridge will be drawn into the cartridge mounting hole. 12. The excavating tool holder fastening system of claim 11, wherein the pin is threadably mountable to the abutment whereby the pin engaging surface is helically movable to engage the cartridge engaging surface. 13. The toolholder fastening system for an excavating tool of claim 11, wherein at least one of the toolholder engaging surface and the pin engaging surface is generally tapered. 14. The toolholder fastening system for excavating tools as claimed in claim 11, wherein the seat has a shoulder and the toolholder has a toolholder shoulder whereby when the end of the toolholder is introduced into the toolholder When installed in the hole, the abutment will rest against the shoulder of the cartridge. 15. The toolholder fastening system for excavating tools as claimed in claim 11, wherein at least one of the end of the toolholder and the toolholder mounting hole is tapered so that when the pin engaging surface is moved to engage the toolholder Engagement of the engaging surfaces to introduce the end of the cartridge into the cartridge mounting hole will cause the end of the cartridge to wedge into the cartridge mounting hole of the standoff. 16. The toolholder fastening system for an excavating tool as claimed in claim 15, wherein the seat has an abutment and the toolholder has a toolholder shoulder whereby when the end of the toolholder is introduced into the toolholder When installed in the hole, the abutment will rest against the shoulder of the cartridge. 17. The toolholder fastening system for an excavating tool of claim 15, wherein the pin is threadably mountable to the abutment whereby the pin engaging surface is helically movable to engage the toolholder engaging surface. 18. The toolholder fastening system for an excavating tool of claim 15, wherein at least one of the toolholder engaging surface and the pin engaging surface is generally tapered. 19. A toolholder fastening system for an excavating tool comprising: a toolholder with an end having a toolholder engaging notch, said engaging notch having a toolholder engaging surface; a toolholder with a A holder into which is inserted the tool holder mounting hole at the end of the tool holder and a threaded holder pin hole; abutment pin hole, so that the pin engaging surface is helically movable so as to engage with the toolholder engaging surface, at least one of the toolholder engaging surface and the pin engaging surface defines a slope, and at least the toolholder end and the toolholder mounting hole One of them is tapered so that when the pin engaging surface moves to engage the cartridge engaging surface, the end of the cartridge will be guided and wedged into the cartridge mounting hole. 20. The tool holder fastening system for excavating tools as claimed in claim 19, wherein the support has a shoulder and the tool holder has a tool holder shoulder, so that when the end of the tool holder is introduced into the tool holder When in the hole, the abutment will rest against the shoulder of the cartridge. 21. The toolholder fastening system for an excavating tool of claim 19, wherein at least one of the toolholder engagement recess and the pin engagement surface is generally tapered. 22. The tool holder fastening system for an excavating tool as claimed in claim 19, wherein the end of the tool holder has a terminal axis and the threaded standoff pin hole has a pin hole axis, the two axes being perpendicular intersect. 23. The tool holder fastening system for an excavating tool as claimed in claim 19, wherein the end of the tool holder has a terminal axis and the threaded support pin hole of the support has a pin hole axis, the two The axes intersect at an acute angle. 24. The toolholder fastening system of excavating tool as claimed in claim, wherein the toolholder mounting hole of the support has a toolholder mounting hole axis, the first pin has a first pin shaft axis, and the second The pin has a second pin shaft axis, and the first and second pin shaft axes are in a straight line and intersect with the tool holder installation hole axis. 25. The toolholder fastening system for excavating tools according to claim 19, wherein the toolholder mounting hole of the support has a toolholder mounting hole axis, the first pin has a first pin shaft axis, and the second pin has a first pin axis. The second pin has a second pin shaft axis, the first pin shaft axis intersects the second pin shaft axis at an acute angle and the two pin shaft axes intersect with the tool holder mounting hole axis. 26. A toolholder for an excavating tool for use in conjunction with a support having a toolholder mounting hole into which the toolholder is inserted and a pin having a pin engaging surface removably mounted on the support, said tool The clip includes an outer wear zone and an end having a cartridge engaging surface engaged with the pin engaging surface, at least one of the cartridge engaging surface and the pin engaging surface defining a ramp such that when the pin engaging surface When moved to engage the cartridge mating face, the tip will be guided into the cartridge mounting hole of the standoff. 27. The digging tool holder of claim 26, wherein the holder engaging surface defines a ramp. 28. The digging tool holder of claim 27, wherein the holder engagement surface is generally tapered. 29. The excavating tool holder of claim 27, wherein the outer wear zone defines a cartridge shoulder that abuts the holder when the distal end is introduced into the holder mounting hole of the holder. 30. The toolholder for an excavating tool according to claim 27, wherein the toolholder tip is tapered so that when the pin engaging surface is moved to engage the toolholder engaging surface, the toolholder tip is introduced into the abutment. When in the cartridge mounting hole, the end of the cartridge will be wedged into the cartridge mounting hole of the standoff. 31. The excavating tool holder of claim 30, wherein the outer wear zone defines a cartridge shoulder that abuts the carrier when the distal end is introduced into the carrier mounting hole of the carrier. 32. A toolholder fastening system for excavating tools, comprising: a toolholder with a toolholder engaging surface; a toolholder mounting hole with a toolholder inserted therein and a support that intersects the toolholder mounting hole a seat for the seat pin hole, said seat pin hole defining a seat engaging surface inclined downwardly relative to the toolholder mounting hole; and a pin engaging the seat engaging surface and the toolholder engaging surface, whereby The pin is removable to allow the cartridge to be introduced into the cartridge mounting hole. 33. The toolholder fastening system for an excavating tool as claimed in claim 32, wherein the pin has a seat engaging portion and a toolholder engaging portion, the toolholder engaging portion engages the toolholder engaging surface, and The seat engaging portion engages with the seat engaging surface. 34. The toolholder fastening system for an excavating tool as recited in claim 32, wherein the pin has a straight cylindrical section that engages the toolholder engaging surface and an angled cylindrical section that engages the abutment engaging surface. 35. The toolholder fastening system for an excavating tool as claimed in claim 34, wherein the toolholder interface is defined by a transverse pin hole. 36. The excavator tool holder fastening system of claim 35, wherein the support pin hole and the transverse pin hole are both cylindrical. 37. The tool holder fastening system for an excavating tool as claimed in claim 34, wherein one of the support pin hole and the inclined cylindrical section has a male fitting structure and the other has a female fitting structure such that the inclined The cylindrical segment will not turn in the standoff pin hole. 38. The toolholder fastening system for an excavating tool as claimed in claim 32, wherein the toolholder has an end and at least one of the toolholder end and the toolholder mounting hole is tapered such that when the moving pin So that when the tool holder is introduced into the tool holder mounting hole, the end of the tool holder is wedged into the tool holder mounting hole of the support. 39. The toolholder fastening system for an excavating tool as claimed in claim 38, wherein the seat has an abutment and the toolholder has a toolholder shoulder so that when the pin is moved to introduce the toolholder into the toolholder When installed in the hole, the abutment will rest against the shoulder of the cartridge. 40. A toolholder fastening system for an excavating tool, comprising: a toolholder with a transverse pin hole; a support having a toolholder mounting hole into which the toolholder is inserted and intersecting the toolholder mounting hole The support pin hole of the support pin hole is inclined downward relative to the toolholder mounting hole; and a pin passing through and engaging the transverse pin hole of the toolholder has a pin shank, a first wedging member and a second wedging member, each of the first and second wedging members has a seat engaging portion movably engaged with the seat pin hole, at least one of the first and second wedging member can be moved relative to the other The wedging member is moved along the pin shank, whereby the abutment engaging portions of the first and second wedging members are moved along the abutment pin hole, and the toolholder is introduced into the toolholder mounting hole. 41. The toolholder fastening system for an excavating tool as claimed in claim 40, wherein the pin shank has a threaded portion, and one of the first and second wedging members has a wedging threaded hole, whereby One of the first and second wedging members is threadably coupled to the pin and is movable relative to the other wedging member by rotating the pin. 42. The toolholder fastening system for an excavating tool as claimed in claim 40, wherein the pin has a first pitch threaded portion and a second pitch threaded portion, the first wedging member has a first wedging threaded hole so that the first wedging member can be screwed to the first pitch threaded portion of the pin rod, and the second wedging member has a second wedging threaded hole so that the second wedging member can be screwed to the second pitch of the pin rod The threaded portion whereby one of the first and second wedging members can move along the pin relative to the other wedging member by rotating the pin. 43. The tool holder fastening system for an excavating tool according to claim 40, wherein the shape of the support pin hole and the first and second wedging members is such that the first and second wedging members Will not turn in standoff pin hole. 44. The excavator tool holder fastening system of claim 40, wherein the support pin holes and the transverse pin holes are cylindrical. 45. The tool holder fastening system for excavating tools as claimed in claim 44, wherein the first wedging member has a first straight cylindrical section and a first inclined cylindrical section, and the second wedging member has a A second straight cylindrical section and a second inclined cylindrical section, the first and second straight cylindrical sections engage the transverse pin holes of the tool holder, the first and second inclined cylindrical sections define the seat junction and engage the seat Pin-hole engagement. 46. The toolholder fastening system for an excavating tool as recited in claim 45, wherein one of the standoff pin hole and the first and second angled cylindrical sections define a male fit and the other of which A female fit is defined such that the first and second angled cylindrical sections will not rotate within the standoff pin holes. 47. The tool holder fastening system for excavating tools according to claim 46, wherein the male fitting structure is a semi-cylindrical protrusion, and the female fitting structure is a semi-cylindrical groove. 48. The toolholder fastening system for an excavating tool as claimed in claim 45, wherein the toolholder has a toolholder slot intersecting the transverse pin hole, whereby the second wedging member can be moved by relative to the first wedge member. The wedging part is taken out of the tool holder from the tool holder installation hole of the support, so that the first and second straight cylindrical sections no longer interfere with the transverse pin hole, and the first and second inclined cylindrical sections are still in contact with the support The cartridge can be withdrawn from the cartridge mounting hole while the pin hole is engaged. 49. The toolholder fastening system for an excavating tool as claimed in claim 40, wherein the toolholder has a toolholder slot intersecting the transverse pin hole such that the second wedge can be moved by moving the second wedge relative to the first wedge. The tool holder is removed from the tool holder mounting hole of the support by the clamping member, whereby the first and second wedging members do not interfere with the transverse pin hole, and when the tool holder can be withdrawn from the tool holder mounting hole, the first and second wedging members do not interfere with the transverse pin hole. The second wedging member will still be in free engagement with the standoff pin hole. 50. The toolholder fastening system for an excavating tool as claimed in claim 40, wherein the toolholder has an end and at least one of the toolholder end and the toolholder mounting hole is tapered such that when the toolholder is When introduced into the cartridge mounting hole, the end of the cartridge will be wedged into the cartridge mounting hole of the standoff. 51. The toolholder fastening system for an excavating tool as claimed in claim 50, wherein the seat has an abutment and the toolholder has a toolholder shoulder whereby when the toolholder is introduced into the toolholder mounting hole In neutral, the abutment will rest against the shoulder of the tool holder. 52. A tool holder for use with a standoff having a holder mounting hole into which a toolholder is inserted and a holder pin hole sloping downward, and a pin having a pin shank, a first A wedging member and a second wedging member movable along the pin relative to the first wedging member, the first and second wedging members are movably engaged with the support pin hole, the tool holder includes an outer A wear zone and an end having a transverse pin hole substantially aligned with the standoff pin hole when the end of the cartridge is inserted into the cartridge mounting hole whereby the pin can pass between the standoff pin holes Through the transverse pin hole, the first wedging member and the second wedging member engage the standoff pin hole and the transverse pin hole such that moving the second wedging member relative to the first wedging member will introduce the end of the toolholder into the standoff in the tool holder mounting hole. 53. The tool holder of claim 52, wherein said end has a tool holder slot such that the end of the tool holder can be removed from the seat by moving the second wedging member relative to the first wedging member. Tool holder mounting hole, so that the first and second wedging parts no longer interfere with the transverse pin hole, and the end can be withdrawn from the tool holder mounting hole, so the first and second wedging parts are still in contact with the support Pin-hole engagement. 54. A pin for use in combination with a holder having a transverse pin hole, the holder having a holder mounting hole into which the toolholder is inserted and a toolholder sloping down toward the transverse pinhole and A support pin hole intersecting the transverse pin hole, said pin comprising: a pin rod having a first pitch threaded portion and a second pitch threaded portion, a pin with a first straightened cylindrical section, a first inclined cylindrical Section and a first wedging member with a first wedging threaded hole, a second wedging member with a second straight cylindrical section, a second inclined cylindrical section and a second wedging threaded hole, the first wedging The tight threaded hole can be screwed to the first pitch threaded part of the pin rod, and the second wedge threaded hole can be screwed to the second pitch threaded part of the pin rod, so that the first and second straightening cylindrical sections can be engaged with the transverse pin hole and The first and second inclined cylindrical sections are engageable with the pin holes of the support, whereby turning the pin will move the first wedging member relative to the second wedging member and introduce the tool holder into the tool holder mounting hole of the support. 55. The pin of claim 54, wherein the first and second inclined cylindrical sections have a cooperating groove.

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