CN1145539C - Self-locking chuck matched with rotating shaft for use - Google Patents

Abstract

A self-locking chuck for use with a rotatable shaft, comprising: one end of the body is connected with the rotating shaft, and the other end of the body is axially and obliquely filled with a plurality of clamping jaws with threaded surfaces on the outer edges; a screw seat, which is engaged with the clamping jaw by an inner edge taper thread surface; a housing having an upper housing and a lower housing, which respectively cover the head and tail of the body; an elastic impact ring group, which is arranged in the lower shell and comprises a spring and an impact ring, and the upper shell is elastically supported in a normal state; when the drill bit is used, the clamping jaw moves forwards or backwards along with the power rotating direction so as to clamp or release the drill bit, and the impact mode of the screw seat and the impact ring can be adjusted by controlling the upper shell so as to achieve the purpose of automatically locking the clamping jaw.

Description

Self-locking chucks for use with swivel axes

technical field

The invention relates to a collet structure for use with a dynamic electric or pneumatic transmission device. More specifically, it refers to a collet that has the function of a sleeve and can be manually or automatically operated to increase the clamping force. The new structure of the chuck.

Background technique

The conventional clamping structure of an electric drill is shown in Figure 1. It mainly has a body 1 connected to the rotating shaft. The body 1 is externally provided with a rotating shell 2 that can only be rotated in situ, and a fixed shell 3. The inner ring of the body 1 is provided with a plurality of inclined jaws 4, and when the housing 2 is rotated, the jaws 4 can be controlled to move forward or retract obliquely, so as to clamp or release the drill bit 5.

But this kind of commonly used drill bit clamping structure must rotate this turning shell 2 with the user's single-handed application of force, and the other hand then supports the drill bit 5 and puts it in the jaw 4 until it can be released when it is locked. It is inconvenient to operate, and because of the small force application area of the rotating shell 2, the clamping force between the drill bit 5 and the jaws 4 cannot be maintained reliably, and when the clamping force of the drill bit 5 is insufficient, it is necessary to stop the machine to rotate manually The shell 2 is clamped by force again, causing considerable inconvenience to the user. Moreover, in use, both the rotating shell 2 and the fixed shell 3 will rotate, which is easy to cause the danger of the user's operation.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a self-locking chuck used with a rotating shaft.

The purpose of the present invention is achieved by the following technical solutions. According to the self-locking chuck used with the rotating shaft proposed by the present invention, the chuck includes a body and several jaws, and is characterized by:

a. The body is cylindrical and includes a head end, a ring seat and a tail end. The head end is provided with a hollow shaft hole, and a guide groove is arranged on the ring seat. The axis of the guide groove and the ring seat There is an included angle between the axes for intersection with the shaft hole, and the tail end can be assembled with the rotating shaft of the transmission device;

b. The plurality of jaws can slide in each guide groove on the body, and the outer side of each jaw forms a threaded surface;

And there is also: a screw seat, which is wrapped and rotated on the ring seat of the body, and is screwed with the threaded surface of the jaw;

A screw seat retainer is axially positioned on the body so that the screw seat and the jaws are tightly screwed together;

A shell, which is provided with an upper shell and a lower shell, covering the head end and the tail end of the body respectively;

An elastic impact ring set is arranged in the lower shell, and there are springs and impact rings, which are used to elastically support the upper shell in a normal state. The impact ring can be rotated by the upper shell to create a clutch with the screw seat;

A sleeve seat is fixed on the head end of the body, and is used to limit the axial position of the upper shell and the screw seat retainer;

The second bearing assembly is respectively arranged on the screw seat and the ring seat and between the sleeve seat and the upper shell;

A connection block, which is installed in the lower casing, can be worn outside and connected with the transmission device, so as to prevent the casing from rotating with the rotation of the rotating shaft during use;

In this way, when the user rotates the upper casing, the impact ring can be resisted to move up and down in the axial direction, so as to create a clutch with the screw seat, respectively to achieve normal operation and automatic locking of the jaws.

Further, in the present invention, the surface of the screw seat is also provided with several slotted holes and the bottom edge surface is provided with several tooth blocks; There are a number of tooth blocks, which can be engaged with the tooth blocks of the screw seat; the upper shell is provided with a perforation, and the bottom edge is provided with several spaced deep and shallow slot holes, which can be used for the rack of the impact ring. The head end is embedded, and the other side forms a wedge-shaped rib to limit the axial position of the lower shell, and the deep and shallow slots of the upper shell are also filled with a wear-resistant ring of opposite shape; while the inner surface of the lower shell is set There are several longitudinal grooves for the rack on the impact ring to slide axially in the grooves; the two sides of the lower opening of the lower casing extend to form opposite fan-shaped grooves; A number of connecting columns protrude from the bottom, and the connecting columns can extend beyond the above-mentioned two fan-shaped grooves, and are integrated with the transmission device; finally, the sleeve seat is provided with a multi-angle notch, which can be inserted into the nut It can be disassembled or used for wrench sets to provide force, and a rod-shaped tool is used to pass through the hole into the slot to apply reverse force, so that the screw seat and the threaded surface of the clamping jaw are tightly engaged.

The advantages of the present invention are: 1. Since the upper casing can be held by hand to adjust its rotational displacement, the impact ring and the screw seat can be clutched by the deep and shallow grooves of the wear-resistant ring, so that the jaws can reach normal Dual mode of operation and automatic impact locking, so it has obvious practical value; 2. Since the connection block is set to connect with the transmission device, the housing will not rotate with the rotating shaft during use, thus ensuring the safety of users; 3. . Due to the sleeve seat that can be tightly connected with the body, the multi-angle notch can be placed on the nut, and the nut can be disassembled through the forward and reverse rotation of the transmission device; 4. Because the rod-shaped tool can be extended Inserting into the groove of the screw seat, and the cooperation between the wrench and the socket seat, it is possible to use the rod-shaped tool and the wrench to hold the reverse operation, so the clamping force of the drill bit can be manually increased or disassembled.

Description of drawings

The accompanying drawings of the present invention are briefly described as follows:

Fig. 1 is a three-dimensional appearance view of a conventional electric drill and its chuck.

Fig. 2 is a three-dimensional exploded schematic view of the chuck structure of the present invention.

Fig. 3 is a schematic cross-sectional view of the chuck structure of the present invention.

Fig. 4 is a schematic cross-sectional view of the normal operation mode of the present invention.

Fig. 5 is a schematic cross-sectional view of the impact action mode of the present invention.

Fig. 6 is a schematic diagram of the operation of the present invention with a rod-shaped tool and a wrench.

Fig. 7 is a schematic diagram of disassembly and assembly of the sleeve nut of the present invention.

Detailed ways

Next, a preferred embodiment of the present invention is given according to Fig. 2 to Fig. 7 .

Please refer to Fig. 2 and shown in Fig. 3, chuck of the present invention comprises:

A cylindrical body 10, the body 10 includes a head end 11, a ring seat 12 and a tail end 13, wherein the head end 11 is provided with a hollow shaft hole 14, and the ring seat 12 is equipped with A guide groove 15 is provided. There is an angle between the axis of the guide groove 15 and the axis of the ring seat 12 to communicate with the intersecting shaft hole 14. In addition, the tail end 13 is provided with a threaded hole 16 for the rotating shaft 91 of the transmission device 90. screwed together, and a positioning groove 17 is provided at the bottom;

Several jaws 20 can slide in each guide groove 15, each jaw 20 forms a thread surface 21 on the outside, and the front end forms a clamping surface 22;

A screw seat 30, which wraps and rotates on the ring seat 12 of the body 10, is provided with a tapered thread surface 31 for screwing with the thread surface 21 of the jaw 20, and the surface is provided with several slots 32, and Several tooth blocks 33 are arranged on the bottom edge surface;

A screw seat retainer 34 is axially positioned on the head end 11 of the body 10 to resist the screw seat 30;

An elastic impact ring group 40 includes a spring 41 and an impact ring 42, wherein the impact ring 42 is in a ring shape, and a plurality of racks 43 are longitudinally arranged on the side edge, and the two sides of the head end of the rack 43 are formed with tapered surfaces , and the top edge of the impact ring 42 is provided with several tooth blocks 44, which can be used for the tooth blocks 33 of the screw seat 30 to engage with each other, and the spring 41 is arranged on the bottom edge of the impact ring 42 for normal elastic support. The impact ring 42 is displaced upwards;

A casing 50 is provided with an upper casing 51 and a lower casing 57, wherein the upper casing 51 is a casing with upper and lower ends open, for covering the head end 11 of the body 10, with an upper opening The inner edge is protrudingly provided with a fixed ring 52, and the lower opening edge is provided with several spaced deep and shallow slot holes 53, 54, which can be used for fitting the head end of the rack 43 of the impact ring 42, while the outer edge forms a wedge-shaped stop. Side 55; the lower casing 57 is a casing with upper and lower openings for covering the tail end 13 of the body 10, and its upper opening can be sleeved on the wedge-shaped rib 55 of the upper casing 51 to maintain The axial limit of the lower housing 57, and the inner surface is protruded with several spaced longitudinal grooves 58, which can be used for the rack 43 of the impact ring 42 to slide in the axial direction, and the lower opening can be used for the tail end 13 to pass through. It is set and fixed in the positioning groove 17 by the positioning piece 18, and the opposite fan-shaped grooves 59 are formed on both sides of the lower opening, so that the connecting block 80 can pass through.

A wear-resistant ring 60 is made of a wear-resistant material, and is located at the lower opening of the upper housing 51. Relatively deep and shallow grooves 53, 54 are provided with relatively deep and shallow grooves 61, 62 for mutual embedding. Equipped with a protective upper casing 51, and the two sides of the deep and shallow grooves 61, 62 are provided with a tapered surface matching the head end of the rack 43, so that when the wear-resistant ring 60 rotates, the rack 43 can move up and down. shift.

A socket seat 70 is provided with a fixed connection part 71 and a sleeve part 72. The fixed connection part 71 is in the shape of a hollow cylinder, and a plurality of positioning wedges 73 are protruded on the inner wall surface for being tightly inserted into the body 10. The head end 11 of the upper housing 51 is formed to be fixed, and the outer wall surface is provided with a limit ring 74, so that when the fixed part 71 is inserted into the head end 11, it can be positioned against the fixed ring 52 of the upper housing 51, and another set A polygonal notch 75 is provided in the cylinder portion 72 for the nut 94 to be sleeved (see FIG. 7 );

The second bearing assembly is provided with a steel ball ring 76 and a washer 77 for stacking each other, and respectively placed in the limit ring 74 and the fixed ring 52, as well as between the screw seat 30 and the ring seat 12, to increase the smoothness of operation and reduce friction;

A connecting piece 80 is an annular body, arranged between the spring 41 and the lower housing 57, and has a plurality of connecting posts 81 protruding downward. The bolt 92 of the device 90 is clamped, and is subjected to the elastic force of the spring 41, and normally conflicts with the front end of the transmission device 90, and is clamped and connected into one body.

After having understood above-mentioned structure, explain as follows with the present invention action now:

The present invention is described with a drill 93 as the main embodiment of the clamped tool; a drill 93 is inserted between the shaft hole 14 of the body 10 and the clamping surface 22 of each jaw 20 . When the rotating shaft 91 rotates quickly in the direction of action, it will drive the body 10 and the clamping jaws 20 on it to rotate instantaneously. By the cooperation of the tapered threaded surface 31 of the screw seat 30 and the threaded surface 21 of the clamping jaws 20, the clamping Claw 20 tilts forward in an instant, forming the form that the outer end of clamp jaw 20 gradually leans towards the center, and clamps the drill bit 93, and increases the friction force with clamping surface 22, so that the clamping is more stable; and clamp jaw 20 Because the drill bit 93 is tightly clamped, it can no longer move forward, and its threaded surface 21 and the tapered threaded surface 31 of the screw seat 30 produce positioning engagement, that is, in a locked state, and the screw seat 30 then starts to rotate synchronously with the body 10, and The upper casing 51, the lower casing 57, the spring 41 and the impact ring 42 are connected to each other as a whole because the connecting block 80 is positioned and engaged with the bolt 92 of the transmission device 90, so that they will not rotate with the rotation of the rotating shaft 91. It is quite practical and safe to use.

Please refer to Figure 4, which is a schematic diagram of the normal action mode of the present invention. The user can apply force to the upper casing 51 to adjust its rotational displacement, and select the shallow groove belt 62 of the wear-resistant ring 60 to fit into the rack 43. At this time, the impact ring 42 will be displaced downward by the top contact of the wear-resistant ring 60, and the tooth block 44 of the impact ring 42 will be synchronously detached from the tooth block 33 of the screw seat 30 to engage, forming a screw seat 30 running without any contact impact.

Please refer to Fig. 5, which is a schematic diagram of the action of the impact action mode of the present invention. When the drill bit 93 rotates towards the action direction to perform the drilling action, when the load damping force is large or the clamping force of the drill bit 93 is insufficient, it can be used in use. Or rotate the upper casing 51 during shutdown, because the upper casing 51 does not rotate for the user, therefore, there is no safety concern, and the wear-resistant ring 60 is rotated to the deep groove belt 61. At this time, the impact ring 42 will be affected. The elastic return of the spring 41 moves upwards, and the rack 43 will be fitted and positioned with the deep groove belt 61, and the tooth block 44 will also be synchronously meshed with the tooth block 33 of the screw seat 30, so that when the screw seat 30 rotates, its The tooth block 33 will impact with the tooth block 44 of the impact ring 42, and the impact ring 42 positioned in the direction of rotation will reciprocate up and down in the channel 58 of the lower housing 57, so that the threaded surface 31 of the screw seat 39 and the clip The threaded surface 21 of the claw 20 is more tightly locked, thereby eliminating the gap between the threads, and providing the drill bit 93 with a more stable clamping force and a heavy torsion output.

Please refer to FIG. 6 , wherein the upper housing 51 is provided with a perforation 56 relative to the slot 32 of the screw seat 30 , which can be inserted into the rod-shaped tool 96 and clamped in the slot 32 to match the sleeve seat 70 sets. Insert a wrench 95 and apply reverse operation, so that the threaded surface 31 of the screw seat 30 and the threaded surface 21 of the clamping jaw 20 are more tightly locked, so as to achieve the manual disassembly of the drill bit 93 or increase the clamping effect.

Furthermore, please refer to shown in Fig. 7, the inner edge of the sleeve seat 70 of the present invention forms a polygonal notch 75, which can be provided with a nut 94, and by the operation of the rotating shaft 91, the locking and locking of the nut 94 can also be achieved. Loose effect.

Claims (9)

1, a kind of self-locking chuck of the rotating shaft use of arranging in pairs or groups, this chuck comprises body (10) and several jaws (20), it is characterized in that:

A. this body (10) is cylindric and comprises cephalic par (11), ring seat (12) and tail end (13), be provided with the axis hole (14) of hollow form in this cephalic par (11), and set guide groove (15) on the ring seat (12), between the axis of the axis of guide groove (15) and ring seat (12) angle is arranged, itself and axis hole (14) intersect, and this tail end (13) can be assembled the rotating shaft (91) of transmission device (90);

B. these several jaws (20) slidably in each guide groove (15), form flank (21) outside each jaw (20);

C. and also have: a spiral shell seat (30) is to coat to rotate on the ring seat (12) of body (10), and screws togather with the flank (21) of this jaw (20);

One spiral shell seat guard ring (34), be axial location on body (10), closely screw togather to make spiral shell seat (30) and jaw (20);

One housing (50) is to be provided with upper shell (51) and lower house (57), is coated on the cephalic par (11) and tail end (13) of body (10) respectively;

One elastic impact ring group (40) is to be located in the lower house (51), comprise spring (41) and impact ring (42), and normality elasticity shores upper shell (51), and this impacts ring (42) can be subjected to upper shell (51) rotation, with spiral shell seat (30) generation clutch;

One receiver (70) is the cephalic par (11) that is fixed in this body (10), in order to upper shell (51) and spiral shell seat guard ring (34) axial limiting;

Two bearing assemblies, be located at respectively that this spiral shell seat (34) and ring seat (12) go up and receiver (70) and upper shell (51) between;

One contiguous block (80) is to be located in the lower house (51), and can be arranged in outer and link into an integrated entity with transmission device (90).

2, the self-locking chuck of collocation rotating shaft use according to claim 1 it is characterized in that spiral shell seat (30) surface is provided with several slotted eyes (32), and the root edge face is provided with several tooth pieces (33).

3, the self-locking chuck of collocation rotating shaft use according to claim 1 and 2, it is characterized in that, impacting ring (42) is to be a ring-type, be provided with several tooth bars (43) in lateral margin, and rim surface is provided with several tooth pieces (44), and these tooth pieces (44) engage mutually with the tooth piece (33) of this spiral shell seat (30).

4, the self-locking chuck of collocation rotating shaft use according to claim 1, it is characterized in that, upper shell (51) is established a perforation (56), and the root edge face is provided with several can be for interval shape dark, shallow slot hole (53), (54) of tooth bar (43) the head end embedding of impacting ring (42), and side forms the wedge shape rib (55) to lower house (57) axial limiting in addition.

5, the self-locking chuck that uses of collocation rotating shaft according to claim 4 is characterized in that, the wear-resisting ring (60) of establishing a relative shape is filled out in dark, shallow slot hole (53), (54) of upper shell (51).

6, the self-locking chuck of collocation rotating shaft use according to claim 1 is characterized in that the inner face of lower house (57) is provided with several conduits (58) longitudinally, and the tooth bar (43) that impacts ring (42) endwisely slips in interior.

7, the self-locking chuck of collocation rotating shaft use according to claim 1 is characterized in that two sides of lower house (57) under shed extend to form relative fan groove (59).

8, the self-locking chuck that uses according to claim 1 or 7 described collocation rotating shafts, it is characterized in that contiguous block (80) is to be ring body, the prominent some joint pins (81) of establishing downwards, this joint pin (81) can be extended through outside two fan grooves (59), and links into an integrated entity with transmission device (90).

9, the self-locking chuck of collocation rotating shaft use according to claim 1 is characterized in that, establishes polygonal notch (75) in this receiver (70).

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