CN101987381B

CN101987381B - Cutting machine

Info

Publication number: CN101987381B
Application number: CN200910163870XA
Authority: CN
Inventors: 哈利·索默; 沃伦·布朗; 格雷厄姆·格哈德; 金词宽
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2009-08-07
Filing date: 2009-08-07
Publication date: 2012-07-18
Anticipated expiration: 2029-08-07
Also published as: CN101987381A

Abstract

The invention relates to a cutting machine. The cutting machine comprises a workbench, a support, a cutting mechanism and a clamp release mechanism, wherein the workbench is provided with an opening and comprises an upper surface used for supporting a workpiece; the support is used for supporting the workbench; the cutting mechanism is fixed to the lower surface of the workbench, is accommodated in the support, and comprises a motor, a reciprocating lever and a motion converting mechanism, wherein the motor outputs rotating motion; the reciprocating lever drives a saw blade which passes through the opening to reciprocate; the motion converting mechanism converts the rotation driving of the motor into the reciprocating motion of the reciprocating lever; and the clamp release mechanism is used for clamping and releasing the saw blade operationally and comprises an operating element which is positioned on the outer surface of the workbench or the support. Compared with the prior art, the cutting machine ensures that the saw blade is easy and convenient to replace and the time and labor are saved.

Description

Cutting machine

Technical Field

The invention relates to a cutting machine, in particular to a cutting machine with a reciprocating cutting mechanism.

Background

The conventional jig saw can perform cutting of various curved and straight lines, and thus is widely used for processing of plate materials made of various materials. Generally, a jigsaw includes a motor, a housing accommodating the motor, a motion converting mechanism accommodated in a gear box housing, driven by the motor, and converting a rotational motion of the motor into a reciprocating motion of a reciprocating lever, a saw blade connected to the reciprocating lever via a chuck device, and a base plate supporting a body of the jigsaw on a surface of a workpiece.

To expand the application of the jigsaw, those skilled in the art invert it onto the lower surface of a table for cutting when it is desired to move the workpiece. However, the existing inverted jigsaw is usually a jig saw which is directly turned over from the market and is fixed by a workbench with a certain connecting structure. When the operator replaces the saw blade in the using process of the inversion jig saw, the saw blade chuck of the jig saw is of a self-contained structure of the jig saw, and the saw blade chuck and the body of the jig saw are inverted below the workbench. The operator needs to reach under the table to operate the clamp release mechanism to enable the blade to be replaced. The operator needs to bend over or fumble with his hand in order to find the release mechanism of the collet. The replacement process of the saw blade is inconvenient, and the operation wastes time and labor.

Disclosure of Invention

The invention provides a cutting machine convenient to operate.

In order to achieve the purpose, the technical scheme of the invention is as follows: a cutting machine comprising: a table having an opening, including an upper surface for supporting a workpiece; a support for supporting the worktable; the cutting mechanism is fixed on the lower surface of the workbench and accommodated in the support and comprises a motor for outputting rotary motion, a reciprocating rod for driving the saw blade passing through the opening to reciprocate and a motion conversion mechanism for converting the rotary drive of the motor into the reciprocating motion of the reciprocating rod; and a clamp release mechanism operable to clamp and release the saw blade; the clamp release mechanism includes an operating element located on an outer surface of the table or support.

Compared with the prior art, the invention leads the operation of clamping and releasing the mechanism of the inverted jig saw blade to the position which is easy to be controlled by an operator through the operating element arranged on the workbench or the support, so that the replacing process of the saw blade is simple and convenient, and time and labor are saved.

Preferably, the operating element is arranged on the upper surface of the workbench. The operator can directly control and change the saw blade in the visible range without bending down or probing the hand into the position below the workbench, and the whole operation process is safe and reliable.

Preferably, the saw blade clamping and releasing mechanism comprises a clamping wrench rotating around the axis of the reciprocating rod, and a linkage mechanism is arranged between the operating element and the clamping wrench, so that the operating element drives the clamping wrench to rotate. By providing a linkage, the operator can control the clamping and release of the saw blade within a suitable distance range.

Preferably, the linkage mechanism comprises a connecting plate which is matched and connected with the operating element and rotates around an axis parallel to the axis of the reciprocating rod, and an actuating element which is matched and connected with the connecting plate and drives the clamping wrench to move. The linkage converts or transitions the movement between the operating element and the clamping wrench so that the operator can control the blade change with the most comfortable motion.

Preferably, the axis of rotation of said web is parallel to the pivot axis of said actuating member.

Preferably, the axis of rotation of the web rotates about the pivot axis of the actuating member.

Preferably, the actuating member comprises a turret pivotally arranged relative to the reciprocating lever, the turret comprising a substantially C-shaped base having a connecting pivot at one end, the other end of the base being provided with a vertically extending push post, and a connecting lug arranged between the two ends of the base.

Preferably, the height of the pushing upright post is greater than the reciprocating stroke of the reciprocating rod. Thereby, guarantee to promote the stand and can effectually promote the tight spanner of clamp and remove.

Preferably, the pushing column is provided with a stop flange, and when the clamping wrench abuts against the abutting surface of the pushing column, the stop flange prevents the clamping wrench from being disengaged from the abutting surface.

Preferably, said blade clamping release mechanism further comprises a resilient member for moving said operating member towards the clamping position. Thus, the blade clamping and release mechanism can automatically return to the clamping position when the operator releases the operating element, and once the operator releases the operating element, the blade clamping mechanism is kept in the clamping position, and the whole cutting mechanism is ensured to be in a safe working position.

Preferably, the elastic member is a tension spring provided between the table and the operation member, and the tension spring is stretched along a moving direction of the operation member.

Preferably, the saw blade clamping and releasing mechanism comprises a clamping wrench rotating relative to the axis of the reciprocating rod and an actuating element which is matched with the operating element and drives the clamping wrench to move, the cutting mechanism comprises a speed reducer casing, the elastic element is a torsion spring arranged between the actuating element and the speed reducer casing, and the torsion spring biases the actuating element to rotate towards the position of clamping the saw blade.

Preferably, the operating element is translated relative to the table. Therefore, the saw blade clamping and releasing mechanism is simple in structure and convenient to operate.

Preferably, the table is provided with a runner, and the operating member comprises a slide plate operable to slide along the runner between a position clamping the saw blade and a position releasing the saw blade.

Preferably, the operating element further comprises an opening provided on the slide plate. In this way, the operator can easily insert a finger into the opening and dial the operating element.

Preferably, the blade clamping and releasing mechanism comprises a clamping wrench which rotates relative to an axis perpendicular to the axis of the reciprocating rod, and a linkage mechanism is arranged between the operating element and the clamping wrench. By providing a linkage, the movement of the clamping wrench is converted into a movement of the operating element which is easy for the operator to operate, and the operation of changing the saw blade is simplified.

Preferably, the linkage mechanism comprises a connecting plate which is matched and connected with the operating element and rotates relative to an axis which is perpendicular to the axis of the reciprocating rod, and an actuating element which is connected with the connecting plate and drives the clamping wrench to move.

Preferably, the actuating element includes a pressing rod, one end of the pressing rod is provided with a pivot hole, the pressing rod is pivotally fixed on the workbench or the base, the other end of the pressing rod is provided with a pressing part, the connecting plate is connected with the middle part of the pressing rod through a pin, and the pressing part is driven by the connecting plate to rotate around the pivot hole, so that the clamping wrench is moved.

Preferably, the product of the distance from the center of the pivot hole of the pressing rod to the pressing surface of the pressing part and the sine value of the pivoting angle of the pressing rod around the pivot hole is larger than the reciprocating stroke of the reciprocating rod. Thereby, the pressure of assurance depression bar can be reliable moves clamping spanner.

Preferably, said operating member rotates relative to said table.

Preferably, the clamping release mechanism comprises a clamping wrench rotatable about an axis perpendicular to the axis of the reciprocating rod, and a pivoting actuating element is provided between the operating element and the clamping wrench.

Preferably, said operating member and said actuating member pivot about the same pivot axis. Therefore, the operating element is compact in structure and convenient to assemble.

Drawings

The invention is further described with reference to the following figures and embodiments.

Fig. 1 is a perspective view of the cutting machine of the present invention.

Fig. 2 is a perspective view of the cutting machine table of the present invention flipped over and with the support removed.

Fig. 3 is an exploded perspective view of a first embodiment of the blade clamp release mechanism of the cutting machine of the present invention.

Fig. 4 is a perspective view of the saw blade clamping release mechanism shown in fig. 3 in a clamped state.

Fig. 5 is a perspective view of the blade clamp release mechanism shown in fig. 3 in a released state.

Fig. 6 is a top view of the blade clamp release mechanism of fig. 4.

Fig. 7 is a top view of the blade clamp release mechanism of fig. 5.

Fig. 8 is an exploded perspective view of a second embodiment of the blade clamp release mechanism of the cutting machine of the present invention.

Fig. 9 is a perspective view of the blade clamp release mechanism of fig. 8 in a released state.

Fig. 10 is a front view of the blade clamp release mechanism of fig. 9.

Fig. 11 is a front view of the blade clamp release mechanism of fig. 8, with the blade clamp release mechanism in a clamped state.

Fig. 12 is a perspective view of a third embodiment of the blade clamp release mechanism of the cutting machine of the present invention.

Fig. 13 is a front view of the blade clamp release mechanism of fig. 12, with the blade clamp release mechanism in a released state.

Fig. 14 is a front view of the saw blade clamping release mechanism of fig. 12, with the saw blade clamping release mechanism in a clamped state.

Wherein,

2 cutter 31 through hole 88 drawer

4 support leg of slide groove 110 of working table 32

6 control panel of shield assembly 33 containing groove 112

8 platen assembly 34 shroud body 116 main switch

Speed regulating switch for 10 support 36 dust suction pipe 118

12 cutting mechanism 38 left guard plate 120 motor

14, 14a, 14b blade clamp release 40 right shroud plate 122 motor housing

Mechanism 44 extends the casing of the gearbox 124

16 guide assembly 46 end cap 125 reciprocating rod receiving hole

19 workpiece 48 shroud clamping mechanism 126 reciprocating rod

20 opening 50 grip knob 128 reciprocating rod axis

21 guard plate 56 support 130 saw blade

21a slot 58 extension arm 132 motion conversion mechanism

22 upper surface 70

guide wheel

134, 134a clamp

24 lower surface 72 pressure plate 135 clamping seat

26a, 26b, 26c, 26d side wall 74 adjustment wrench 136 swivel

28 longitudinal T-shaped groove 82 base 138 slot

29 bottom 84

body

140, 140a, 140b clamping wrench

30 transverse T-shaped grooves 86a, 86b, 86c, 86d support the pressing surface of wall 141

142 abutment 166 stops flange 194 pivot hole

144, 144a, 144b operating member 168 attachment lugs 196 pin holes

146 slide 170 hole 198 pressing part

148 opening 172 connecting pivot portion 200 press face

149 opening axis 174 pivot axis 202 fixing plate

150 connecting column 176 connecting hole 204 fixing part

151 connecting post axis 178 pin 206 mounting hole

152 connecting plate 179 pin 208 connection

154 pin hole 180 torsion spring 210 pin hole

155 axis of rotation 182 recess 211 pivot axis

156 pin 184 catch 212 pin

157 pin 186 tension spring 214 pull ring

158 turret 188 big lug 215 pivot connection

160 base 189 hole axis 216 platen

162 pushing post 190 small lug

164 abutting surface 192 press rod

Detailed Description

Referring to fig. 1-2, a cutting machine 2 includes a table 4, a support 10 supporting the table 4, a shield assembly 6 disposed on an upper surface 22 of the table 4, a platen assembly 8 adjustably coupled to the shield assembly 6 for applying a compressive force to a workpiece, and a cutting mechanism 12 disposed on a lower surface 24 of the table 4.

According to the usual way of use of such a cutting machine by an operator, the left side in fig. 1 is defined as the front of the cutting machine 2 and the right side is defined as the rear of the cutting machine 2. The table 4 has an upper surface 22, a lower surface 24, and

side walls

26a, 26b, 26c, 26d extending perpendicularly with respect to the upper and lower surfaces. The upper surface 22 and the

side walls

26a, 26b, 26c, 26d form the outer surface of the table 4. Opening 20 opens onto table 4 at the front of cutter 2 and extends from upper surface 22 to lower surface 24. The saw blade 130 passes through the opening 20 from the bottom up. The workpiece 19 may be placed on the upper surface 22 of the table 4 and moved along the upper surface 22 to be cut by the saw blade 130. The opening 20 is substantially square in shape. A square blade guard 21 is fitted into the opening 20 to prevent dust from entering the inside of the cutting machine to some extent, and when an abnormal condition such as breakage of the blade 130 occurs, the guard 21 is removed and the operator takes out the blade 130. The guard plate 21 has a slot 21a formed in the middle thereof, and the saw blade 130 can pass through the slot 21 a.

The worktable 4 is also provided with a longitudinal T-shaped groove 28 and a transverse T-shaped groove 30. A longitudinal T-shaped slot 28 extends from the front of the table 4 to the rear of the table 4. The transverse T-shaped slot 30 is located on the front side of the opening 20 and intersects the longitudinal T-shaped slot 28, thereby dividing the upper surface 22 of the entire table 4 into four sections. The transverse T-shaped slot 30 and the longitudinal T-shaped slot 28 extend from one

side wall

26a, 26b of the table 4 to the

other side wall

26c, 26d, which is arranged in parallel. The cross sections of the longitudinal T-shaped groove 28 and the transverse T-shaped groove 30 are the same, and a plurality of through holes 31 arranged at intervals along the extending direction of the T-shaped grooves are formed in the bottoms 29 of the longitudinal T-shaped groove 28 and the transverse T-shaped groove 30.

The shield assembly 6 includes a stand 56 removably attached to the table, an extension arm 58 disposed perpendicular to the stand, and an extension hood 44, left and right shield panels 38, 40 and shield body 34 attached thereto. The shroud clamping mechanism 48, including the clamping knob 50, adjustably secures the extension housing 44 to the extension arm 58. Guide wheels 70 are provided below shield body 34 to guide the reciprocating motion of saw blade 130. A dust suction pipe 36 is provided above the shield body 34 for externally connecting a dust collector to suck out dust generated by cutting. The left and right shield plates are connected to the shield main body 34 by a pin shaft 42.

The pressing plate assembly 8 is arranged between the shield assembly 6 and the workbench 4, and the height of the pressing plate 72 relative to the workbench 4 is adjusted by rotating the adjusting wrench 74.

Stand 10 includes a base 82 having a plurality of support feet 110 and a body 84 having support walls 86a, 86b, 86c, 86 d. A drawer 88 is provided at the front of the stand 10 for collecting dust. A control panel 112 is provided on the front support wall 86b of the main body 84, and houses a main switch 116 and a speed control switch 118 of the cutter. The support walls 86a, 86b, 86c, 86d form the outer surface of the holder 10. In the present embodiment, the support 10 has a support wall, and those skilled in the art can appreciate that the worktable and the cutting mechanism can be supported by only a plurality of support legs. Therefore, the support in the present invention may be a bracket formed of a support leg. The outer surface of the corresponding support is the outer wall of the supporting leg.

The cutting mechanism 12 is fixed to the lower surface 24 of the table 4 and accommodated in the holder 10, and includes a motor 120 that outputs a rotational motion, a reciprocating rod 126 that reciprocates a saw blade 130 passing through the opening 20, and a motion converting mechanism 132 that converts a rotational drive of the motor 120 into a reciprocating motion of the reciprocating rod 126; and a blade clamp release mechanism 14 operable to clamp and release the blade 130. The blade clamp release mechanism 14 includes an operating element 144 located on the outer surface of the table 4 or the holder 10.

A first embodiment of the blade clamp release mechanism 14 is described in detail below with reference to fig. 1-7.

The cutter 2 has a cutting mechanism 12. The cutting mechanism 12 includes a motor 120, a motor housing 122 for accommodating the motor 120, and a reduction gear housing 124 connected to the motor housing 120 and accommodating a motion conversion mechanism 132. The rotational motion of the motor 120 is converted to reciprocating motion of the reciprocating rod 126 along the reciprocating rod axis 128 via the motion conversion mechanism 132.

In this embodiment, blade clamp release mechanism 14 includes a collet 134 coupled to reciprocating rod 126. The collet 134 includes a sleeve 136 having a slot 138 through the blade 130 and a clamping element (not shown) received therein for clamping and releasing the blade 130 in response to rotation of the sleeve 136 relative to the reciprocating bar axis 128. Such a clamp is adapted to clamp a T-blade, i.e. a blade having a shoulder at the end thereof which is stopped by the end face of the sleeve 136 having the slot 138. Extending radially outwardly from the outer wall of the rotating sleeve 136 is a clamping wrench 140, which the operator can rotate the clamping wrench 140 about the reciprocating lever axis 128 to clamp and release the saw blade 130.

In this embodiment, the blade clamp release mechanism 14 further includes an operating member 144 disposed on the upper surface 22 of the table 4. That is, the outer surface of the table 4 in the present embodiment is referred to as the upper surface 22 thereof. Of course, the arrangement position of the operating element in the invention is not limited to the upper surface of the workbench, and the operating element can also be arranged on the side wall, especially the front wall, of the workbench according to the requirement, which is also beneficial for the operator to conveniently replace the saw blade. The operating elements may also be provided on the outer surface of the stand 10, such as on the front support wall or on the left and right support walls, as will be appreciated by those skilled in the art. In the case of a support without a support wall, but with support legs only, the outer surface of the support is the outer wall of the support legs. The distance between the operating element and the blade holder is usually set to be less than, or comparable to, the length of a single arm span of a person. In this way, the operator can comfortably reach the operating element, so that the operation of changing the saw blade becomes labor-saving.

The blade clamp release mechanism 14 includes a clamping wrench 140 that rotates about the reciprocating bar axis 128, and a linkage is provided between the operating element 144 and the clamping wrench 140 such that the operating element 144 rotates the clamping wrench 140.

In this embodiment, the linkage mechanism includes an attachment plate 152 coupled to the operating element 144 for rotation about an axis of rotation 155 parallel to the reciprocating rod axis 128, and an actuating element coupled to the attachment plate 152 for moving the wrench 140.

The operating element 144 includes an elongated slide plate 146, an opening 148 in the middle of the slide plate, and an attachment post 150 extending perpendicularly relative to the slide plate. The connection post axis 151 and the opening axis 149 are parallel to each other and spaced apart. In this embodiment, the slide surface of the operating element 144 is substantially flush with the upper surface 22 of the table 4 so that there is no protruding structure on the table top of the table 4 to interfere with the movement of the workpiece thereon. Of course, the operating element can also be recessed below the upper surface of the table, but can be directly accessible from the upper surface. Therefore, the operating element can be conveniently accessed to replace the saw blade under the condition of not influencing the movement of the workpiece. In this case, the table is provided with a recess for accommodating the operating element, and accordingly the surface of the recess also forms the outer surface of the table.

The attachment plate 152 includes pin holes 154 at both ends. The operating element 144 is connected to the connecting plate 152 by means of a pin 156, a pin hole 154 and a connecting post 150.

Preferably, the actuating member includes a rotating bracket 158 pivotally disposed relative to the reciprocating lever 126. The turret 158 includes a substantially C-shaped base 160 and a push post 162 extending perpendicularly relative to the base 160. One end of base 160 is a connecting pivot portion 172 having a pivot axis 174, and push stud 162 is located at the other end of base 160. A connecting lug 168 is provided between the ends of the base 160. Attachment tabs 168 are provided with holes 170 for mating with attachment plates 152 by way of pins 178. Preferably, the axis of rotation 155 of the link plate 152 is parallel to the pivot axis 174 of the actuating member. In particular, the axis of rotation 155 of the link plate 152 rotates about the pivot axis 174 of the actuating member. The pivot portion 172 of the rotating bracket 158 is provided with a connecting hole 176 which is connected to the gearbox housing 124 by a pin 179.

To ensure that the turret 158 can actuate the clamping wrench 140 when the reciprocating rod 126 is in different reciprocating positions, the height of the pushing stud 162 is set to be greater than the reciprocating stroke of the reciprocating rod 126. Of course, the height of the pushing post 162 is preferably equal to the sum of the reciprocating stroke of the reciprocating rod 126 and the axial length of the clamping wrench 140, so that the pushing post 162 can contact the clamping wrench 140 over its entire length to ensure reliable pushing of the clamping wrench 140 and rotation of the collet sleeve 136.

The push post 162 has an abutment surface 164, and after the blade clamp release mechanism 14 is assembled, the abutment surface 164 opposes the abutment surface 142 of the clamp wrench 140. The abutment surface 164 and the abutment surface 142 do not contact but are spaced apart during the reciprocating cutting of the blade 130. When blade 130 needs to be replaced, operating element 144 moves link plate 152, which in turn pivots turret 158 about pivot axis 174. When the rotating frame 158 rotates a certain angle, the abutting surface 164 contacts the abutting surface 142, and the pushing column 162 can further push the clamping wrench 140 to rotate. In order to prevent the pushing stud 162 from failing during the rotation of the pushing clamping wrench 140, a stop flange 166 is provided on the pushing stud 16, so that when the clamping wrench 140 abuts against the pushing stud 162, the stop flange 166 prevents the abutment surface 142 of the clamping wrench 140 from coming out of contact with the abutment surface 164 of the pushing stud 162.

The blade clamp release mechanism 14 also includes a resilient member that moves the operating member 144 toward the clamped position. In this embodiment, the cutting mechanism 12 includes a reduction gearbox housing 124. The resilient member is a torsion spring 180 disposed between the actuating member and the gearbox housing, biasing the actuating member towards a position in which it grips the saw blade. Specifically, a groove 182 extending along the direction of the reciprocating rod axis 128 and a locking groove 184 protruding from the groove are provided on the reduction gearbox housing 124 at a position adjacent to the reciprocating rod receiving hole 125. The torsion spring 180 is received by the recess 182, the catch 184 and the attachment bore 176 of the pivot mount attachment portion 172. Therefore, one end of the torsion spring 180 is clamped in the clamping groove 184, and the other end is clamped in the connecting hole 176.

In the present embodiment, the operating element 144 is translated with respect to the table 4. The slide groove 32 is provided on the table 4, and the operation member 144 includes a slide plate 146. The slide 146 is operable to slide along the runner 32 between a position clamping the saw blade and a position releasing the saw blade. The slide groove 32 is provided at the front of the table 4 and at the right side of the opening 20 so that the operator can perform the operation of replacing the saw blade at a comfortable position. The operating element 144 also includes an opening 148 provided in the slide plate 146. Thus, the operator can insert a finger into the opening 148 to move the sled 146 in a direction away from the saw blade 130.

The specific operation of the blade clamp release mechanism 14 will now be described with reference to fig. 4-7. Fig. 4 and 6 are schematic views showing the blade clamp release mechanism 14 in a clamped state. In this state, the operating element 144 is in the clamping position at the leftmost end of the slide groove 32. The turret 158 pushes the abutment surface 164 of the post 162 away from the abutment surface 142 of the wrench 140 under the action of the torsion spring 180. At this time, the opening axis 149 of the operating member 144 is perpendicular to the reciprocating lever axis 128 by a distance L1, and the shoulder of the saw blade 130 is stopped by the end surface of the collet sleeve 136, and the saw blade is clamped by the clamping member. When the saw blade needs to be replaced, the operator moves slide 146 to the right in the direction of arrow A1, thereby moving link 152 and thus rotating turret 158 about pivot axis 174, so that abutment surface 164 of push post 162 contacts abutment surface 142 of clamp wrench 140. Continued movement of the slide plate 146 causes the push post 160 to push the clamp wrench 140 to the release position, the shoulder of the saw blade 130 is aligned with the slot 138 in the collet swivel 136 and the operator can remove the saw blade with the other hand. Fig. 5 and 7 are schematic views showing the blade clamp release mechanism 14 in a released state. In this state, the operating member 144 is in the release position at the rightmost end of the chute 32. The opening axis 149 of the operating element 144 is at a vertical distance L2 from the reciprocating lever axis 128, L2 > L1. At this time, when the operator releases the slide 146, the rotating frame 158 automatically returns to the clamping state under the action of the torsion spring 180, and accordingly the connecting plate 152 and the operating element 144 return to the clamping position.

A second embodiment of the blade clamp release mechanism 14a is described in detail below with reference to fig. 8-11.

In this embodiment, blade clamp release mechanism 14a includes a collet 134a coupled to reciprocating bar 126. The clamping head 134a comprises a substantially U-shaped clamping wrench 140a and clamping elements (not shown) which are operated by the clamping wrench 140a and move along inclined runners on the clamping shoe 135 to clamp and release the saw blade 130. Such clips are suitable for gripping both T and U shaped saw blades, i.e. the blade can be gripped whether or not the tail of the blade carries a shoulder. The operator may pull the clamping wrench 140a to rotate relative to an axis perpendicular to the reciprocating lever axis 128, thereby causing the clamping member to clamp and release the saw blade 130.

In this embodiment, the operating element 144a is also provided on the upper surface 22 of the table 4.

The blade clamp release mechanism 14a includes a clamping wrench 140a that rotates about an axis perpendicular to the reciprocating lever axis 128, and a linkage is provided between the operating element 144a and the clamping wrench 140a to move the clamping wrench 140a with the operating element 144a to clamp and release the blade.

In this embodiment, the linkage mechanism includes an attachment plate 152 coupled to the operating element 144a for rotation relative to an axis perpendicular to the reciprocating rod axis 128, and an actuating element coupled to the attachment plate 152 for moving the clamping wrench 140 a.

The operating element 144a includes an elongated slide plate 146, an opening 148 in the middle of the slide plate, and large and

small lugs

188, 190 at the ends of the slide plate that extend perpendicularly relative to the slide plate. Two of the large lugs 188 are provided, and one end of the connecting plate 152 can be inserted between the two large lugs 188, and the large lugs 188 are provided with holes which are matched with the pin holes 154 on the connecting plate 152, and the operating element 144a is connected with the connecting plate 152 through the pins 156. The axis 189 of the bore in the large lug 188 is perpendicular to the opening axis 149.

Preferably, the actuating member includes a plunger 192 that rotates relative to an axis perpendicular to the reciprocating rod axis 128. The plunger 192 has a pivot hole 194 at one end and a pressing portion 198 at the other end, with a pin hole 196 disposed between the ends. The pivot hole 194 of the pressing rod 192 and the pin hole 210 of the fixing plate 202 are pivotally fixed to the table 4 by the pin 157. The fixing plate 202 has a fixing portion 204 and a connecting portion 208 extending perpendicularly to the fixing portion. The fixing portion 204 is provided with two mounting holes 206 for fixedly connecting the fixing plate 202 with the table 4 or the support 10. The pin hole 154 of the connecting plate 152 is connected with the pin hole 196 of the middle part of the pressure lever 192 through a pin 212. The pressing portion 198 of the pressing lever 192 has a pressing surface 200 that is rotated about the pivot hole 194 by the connecting plate 152, thereby moving the clamping wrench 140 a.

The plunger 192 is rotatable between a release position, shown in fig. 10, and a clamping position, shown in fig. 11, through an angle θ. The reciprocating lever 126 may be in different reciprocating positions depending on the cutting process. The reciprocating stroke of the reciprocating lever 126 is H. The distance from the pivot hole 194 of the plunger 192 to the pressing surface 200 of the pressing portion 198 is D. To ensure that the plunger 192 can actuate the clamping wrench 140a when the reciprocating rod 126 is in different reciprocating positions, the product of the distance between the center of the pivot hole 194 of the plunger 192 and the pressing surface 200 of the pressing portion 198 and the sine of the angle by which the plunger 192 pivots about the pivot hole 194 is greater than the reciprocating stroke of the reciprocating rod 126, i.e., D sin θ > H. Of course, the product of the distance from the center of the pivot hole 194 of the pressing lever 192 to the pressing surface 200 of the pressing portion 198 and the sine of the angle by which the pressing lever 192 pivots about the pivot hole 194 is preferably equal to the sum of the reciprocating stroke of the reciprocating lever 126 and the width of the pressing surface of the clamping wrench 140a, so that the pressing lever 192 can contact the clamping wrench 140a over the entire width of the pressing surface thereof, ensuring reliable pressing of the clamping wrench 140 a.

The pressing lever 192 has a pressing surface 200, and after the saw blade clamp release mechanism 14a is assembled, the pressing surface 200 faces the pressing surface 141 of the clamp wrench 140 a. During the reciprocating cutting of the saw blade 130, the

pressing surfaces

200 and 141 do not contact each other, but are spaced apart from each other by a predetermined distance. When blade 130 needs to be replaced, operating element 144a moves coupling plate 152, which in turn pivots platen 192 about pivot axis 211. When the pressing rod 192 rotates a certain angle, the

pressing surfaces

200 and 141 are contacted, and the pressing rod 192 can further press the clamping wrench 140a to move.

The blade clamp release mechanism 14a also includes a resilient member that moves the operating member 144a toward the clamped position. In this embodiment, the elastic member is a tension spring 186 provided between the operating member 144a and the table 4, and pulls the operating member 144a toward a position where the saw blade is clamped. Specifically, the operating element 144a is provided with a small ledge 190 with a hole. One end of the tension spring 186 is hooked in the hole of the small lug 190, and the other end is hooked on the workbench 4.

The specific operation of the blade clamp release mechanism 14a will now be described with reference to fig. 10-11. Fig. 11 is a schematic view of the blade clamp release mechanism 14a in a clamped state. In this state, the operating element 144a is in the clamping position at the leftmost end of the slide groove 32. The pressing surface 200 of the plunger 192 is spaced apart from the pressing surface 141 of the spanner wrench 140a by the tension spring 186. At this point, the perpendicular distance from the opening axis 149 of the operating element 144a to the reciprocating lever axis 128 is L3, and the saw blade is clamped by the clamping element. When the saw blade needs to be replaced, the operator moves the slide plate 146 to the right in the direction of arrow a2, thereby moving the link plate 152 and the pressure plate 192 to rotate about the pivot axis 211, so that the pressing surface 200 of the pressure lever 192 contacts the pressing surface 141 of the clamping wrench 140 a. Continuing to move the slide plate 146 so that the clamp plate 192 presses the clamp wrench 140a to the release position, the operator can remove the saw blade with the other hand. Fig. 10 is a schematic view of the blade clamp release mechanism 14a in a released state. In this state, the operating element 144a is in the release position at the rightmost end of the slide groove 32. The opening axis 149 of the operating element 144a is at a vertical distance L4 from the reciprocating lever axis 128, L4 < L3. At this time, the operator releases the slide plate 146, and the operating element 144a automatically returns to the clamping state under the action of the tension spring 186, and accordingly brings the connecting plate 152 and the pressing plate 192 to return to the clamping position. So that the clamping wrench 140a of the chuck is also returned to the clamping position.

A third embodiment of a blade clamp release mechanism 14b is shown in fig. 12-14.

In this embodiment, the same reference numerals are used for the same components of the blade clamp release mechanism 14b as those in the second embodiment. Here, differences of the present embodiment from the above embodiments are explained in detail.

In this embodiment, the operation element 144b is provided on the upper surface of the table 4. The operating element 144b is rotated relative to the table 4 to grip and release the saw blade.

The blade clamp release mechanism 14b includes a clamp wrench 140a that rotates relative to an axis perpendicular to the reciprocating lever axis 128, with a pivoting actuating element disposed between the operating element 144b and the clamp wrench 140 a.

The table 4 is provided with a housing groove 33 in which the operating element 144b is housed. The operating element 144b includes a plate body 147, and an opening 148 provided at one end of the plate body. A pull ring 214 extends vertically from the middle of the plate body 147. In this embodiment, the actuating element is a pressure plate 216. The pressure plate 216 has one end opposite the clamping wrench 140a and the other end fixedly connected to the end of the operating element 144b by means of a pivot connection 215. Preferably, the operating element 144b, the pivotal connection 215 and the pressure plate 216 are integrally formed. It will be appreciated by those skilled in the art that other means for fixedly connecting the pressure plate 216 to the operating element 144b may be employed, such as welding, riveting, etc. The pivot connection 215 has a pivot hole and is connected to the fixing plate 202 by a pin 212. Thus, the operating member 144b rotates about the same pivot axis 211 as the pressing plate 216.

The pressure plate 216 is rotatable between a release position, shown in fig. 13, and a clamping position, shown in fig. 14, through an angle α. The reciprocating lever 126 may be in different reciprocating positions depending on the cutting process. The reciprocating stroke of the reciprocating lever 126 is H. The distance L from the press face to which the press plate 216 pivots is. To ensure that pressure plate 216 can actuate clamping wrench 140a when reciprocating rod 126 is in different reciprocating positions, the product of the distance between the pivot hole of pressure plate 216 to pressing surface 217 and the sine of the angle at which pressure plate 216 pivots about pivot axis 211 is greater than the reciprocating stroke of reciprocating rod 126, i.e., L x sin α > H. Of course, the product of the distance between the pivot hole of the pressure plate 216 and the pressing surface 217 and the sine of the angle by which the pressure plate 216 pivots about the pivot axis 211 is preferably equal to the sum of the reciprocating stroke of the reciprocating rod 126 and the width of the pressing surface of the clamping wrench 140a, so that the pressure plate 216 can be in contact therewith over the entire width of the pressing surface of the clamping wrench 140a, ensuring reliable pressing of the clamping wrench 140 a.

The spring element extension spring 186 is hooked at one end to the pull ring 214 of the operating element 144b and at the other end is connected to the table 4 or the support 10, so that the operating element 144b is moved towards the clamping position.

The operating element can also be provided on the support. Specifically, the operating element is arranged on a base at the bottom of the support. Further, it is disposed in front of the base, i.e., the side that the operator is directly facing during normal operation.

Those skilled in the art will appreciate that many variations in the specific configurations of the operating elements and the like in the present invention are possible. For example, the structure of the chuck itself is various in the prior art, and the structure of the chuck disclosed in the invention can be equivalently replaced. For example, the elastic member only discloses two embodiments of the torsion spring and the extension spring in the present invention, but those skilled in the art can easily understand that other types of springs such as a compression spring and a leaf spring, or other types of elastic members such as an elastic rubber member, etc. can be used as the elastic member in the present invention. Therefore, any changes and substitutions based on the present invention are within the protection scope of the present invention.

Claims

1. A cutting machine comprising:

a table having an opening, including an upper surface for supporting a workpiece;

a support for supporting the worktable;

the cutting mechanism which is fixed on the lower surface of the workbench and is accommodated in the support comprises a motor for outputting rotary motion,

a reciprocating rod driving the saw blade passing through the opening to reciprocate,

a motion conversion mechanism that converts rotational drive of the motor into reciprocating motion of the reciprocating rod; and

a blade clamp release mechanism operable to clamp and release the blade;

it is characterized in that the preparation method is characterized in that,

the blade clamping release mechanism includes an operating element located on an outer surface of the table or support.

2. The cutting machine according to claim 1, characterized in that: the operating element is arranged on the upper surface of the workbench.

3. The cutting machine according to claim 2, characterized in that: the saw blade clamping and releasing mechanism comprises a clamping wrench rotating around the axis of the reciprocating rod, and a linkage mechanism is arranged between the operating element and the clamping wrench, so that the operating element drives the clamping wrench to rotate.

4. The cutting machine according to claim 3, characterized in that: the linkage mechanism comprises a connecting plate which is matched and connected with the operating element and rotates around an axis parallel to the axis of the reciprocating rod, and an actuating element which is matched and connected with the connecting plate and drives the clamping wrench to move.

5. The cutting machine according to claim 4, characterized in that: the rotation axis of the connecting plate is parallel to the pivot axis of the actuating element.

6. The cutting machine according to claim 5, characterized in that: the axis of rotation of the link plate rotates about the pivot axis of the actuating member.

7. The cutting machine according to claim 6, characterized in that: the actuating element comprises a rotating frame which is pivoted relative to the reciprocating rod, the rotating frame comprises a basically C-shaped base part, one end of the base part is provided with a connecting pivot, the other end of the base part is provided with a vertically extending pushing upright post, and a connecting lug is arranged between the two ends of the base part.

8. The cutting machine according to claim 7, characterized in that: the height of the pushing upright post is greater than the reciprocating stroke of the reciprocating rod.

9. The cutting machine according to claim 8, characterized in that: the pushing upright post is provided with a stop flange, and when the clamping wrench abuts against the abutting surface of the pushing upright post, the stop flange prevents the clamping wrench from being separated from the abutting surface.

10. The cutting machine according to claim 2, characterized in that: the blade clamp release mechanism further includes a resilient member for moving the operating member toward the clamping position.

11. The cutting machine according to claim 10, characterized in that: the elastic element is a tension spring arranged between the workbench and the operating element, and the tension spring stretches along the moving direction of the operating element.

12. The cutting machine according to claim 10, characterized in that: the saw blade clamping and releasing mechanism comprises a clamping wrench rotating relative to the axis of the reciprocating rod and an actuating element which is matched with the operating element and drives the clamping wrench to move, the cutting mechanism comprises a speed reducer shell, the elastic element is a torsion spring arranged between the actuating element and the speed reducer shell, and the torsion spring biases the actuating element to rotate towards the position of clamping the saw blade.

13. The cutting machine according to claim 2, characterized in that: the operating element translates relative to the table.

14. The cutting machine according to claim 13, characterized in that: the operating element comprises a sliding plate which is operable to slide along the sliding slot between a position for clamping the saw blade and a position for releasing the saw blade.

15. The cutting machine according to claim 14, characterized in that: the operating element further comprises an opening provided in the slide plate.

16. The cutting machine according to claim 2, characterized in that: the clamping and releasing mechanism comprises a clamping wrench which rotates relative to an axis perpendicular to the axis of the reciprocating rod, and a linkage mechanism is arranged between the operating element and the clamping wrench.

17. The cutting machine according to claim 16, characterized in that: the linkage mechanism comprises a connecting plate which is matched and connected with the operating element and rotates relative to an axis which is vertical to the axis of the reciprocating rod, and an actuating element which is connected with the connecting plate and drives the clamping wrench to move.

18. The cutting machine according to claim 17, characterized in that: the actuating element comprises a pressing rod, one end of the pressing rod is provided with a pivot hole, the pressing rod is pivotally fixed on the workbench or the base, the other end of the pressing rod is provided with a pressing part, the connecting plate is connected with the middle part of the pressing rod through a pin, and the pressing part is driven by the connecting plate to rotate around the pivot hole, so that the clamping wrench is moved.

19. The cutting machine according to claim 18, characterized in that: the product of the distance from the center of the pivot hole of the pressure rod to the pressing surface of the pressing part and the sine value of the pivoting angle of the pressure rod around the pivot hole is larger than the reciprocating stroke of the reciprocating rod.

20. The cutting machine according to claim 2, characterized in that: the operating element rotates relative to the workbench.

21. The cutting machine according to claim 20, characterized in that: the clamping release mechanism comprises a clamping wrench which rotates relative to an axis perpendicular to the axis of the reciprocating rod, and a pivoting actuating element is arranged between the operating element and the clamping wrench.

22. The cutting machine according to claim 21, characterized in that: the operating element and the actuating element rotate around the same pivot.