CN209918921U

CN209918921U - Built-in chuck

Info

Publication number: CN209918921U
Application number: CN201920564425.3U
Authority: CN
Inventors: 金灿灿; 罗国章
Original assignee: ZHEJIANG JINGSU MACHINE TOOL ACCESSORIES Co Ltd
Current assignee: ZHEJIANG JINGSU MACHINE TOOL ACCESSORIES Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-01-10
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses an interior concealed chuck, its technical scheme main points are: including the chuck body that contains the cavity, the setting is at this internal piston of chuck, connect the movable plate on the piston lateral wall, sliding connection is the slider on the chuck body, install the jack catch on the slider, the movable plate separates into first cavity and second cavity with the cavity, first cavity is closer to the jack catch than the second cavity, be equipped with the convex wedge on the slider, be equipped with on the piston with convex wedge sliding fit's chute, be equipped with first passageway on the chuck body, the second passageway, first passageway and first cavity intercommunication, second passageway and second cavity intercommunication, be equipped with a plurality of first springs in the second cavity, first spring elasticity sets up between the interior terminal surface of movable plate and chuck body. In the process that the clamping jaws clamp the workpiece, the first springs are compressed and deformed and generate elastic force, the elastic force of the first springs counteracts part of power of the moving plate, so that the impact force of the clamping jaws when the clamping jaws are close to the workpiece is weakened, and the workpiece is not easily damaged by the clamping jaws.

Description

Built-in chuck

Technical Field

The utility model relates to a chuck technical field, in particular to built-in chuck.

Background

The existing chuck for the machine tool comprises a cylinder body, an end cover, a piston and a plurality of sliding blocks, wherein the end cover is fixed on an opening at the front end of the cylinder body, the piston is arranged in the cylinder body, the sliding blocks are provided with clamping jaws, the sliding blocks are in sliding fit with the end cover, a closed first cavity is formed between the rear part of the piston and the cylinder body, a closed second cavity is formed between the front part of the piston and the end cover, convex wedges are distributed on the periphery of the piston, and inclined grooves in sliding fit with the convex.

Through leading fluid into first cavity or second cavity, make the pressure differential drive piston removal appear between first cavity and the second cavity, and then drive the removal of slider. However, when the slide block drives the jaws to clamp a workpiece, the force instantaneously acting on the workpiece is large, which easily causes the workpiece to deform.

SUMMERY OF THE UTILITY MODEL

The present invention provides a concealed chuck, which buffers the movement of the piston to reduce the damage to the workpiece when clamping the workpiece.

The above technical purpose of the present invention can be achieved by the following technical solutions: a built-in chuck comprises a chuck body with a cavity, a piston arranged in the chuck body, a movable plate connected on the outer side wall of the piston, a sliding block connected on the end surface of the chuck body in a sliding manner, and a clamping jaw arranged on the sliding block, wherein the movable plate separates the cavity of the chuck body into a first cavity and a second cavity, the first cavity is closer to the clamping jaw than the second cavity, a convex wedge is arranged on the end surface of the sliding block facing the center of the chuck body, a chute in sliding fit with the convex wedge is arranged on the outer side wall of the piston, a first channel and a second channel are arranged on the chuck body, openings are arranged on the outer wall of the chuck body, the first channel is communicated with the first cavity, the second channel is communicated with the second cavity, and a fluid pipe with a valve is connected to the opening of the first channel on the outer side wall of the chuck body, the first cavity is in a sealing arrangement, a plurality of first springs are arranged in the second cavity and evenly distributed around the center of the chuck body, and the first springs are elastically arranged between the movable plate and the inner end face of the chuck body.

According to the technical scheme, compressed air or compressed liquid is injected into the first cavity through the first channel, the movable plate is extruded to move towards the second cavity, the movable plate drives the piston to move, and the piston drives the sliding block to move, so that the clamping jaws can clamp a workpiece; meanwhile, the first spring is pressed to deform and generates elastic force, the elastic force of the first spring offsets part of power of the moving plate, and the moving plate moves towards one side of the second cavity, the elastic force of the first spring is stronger, so that the impact force of the clamping jaw when the clamping jaw is close to a workpiece is weakened, the clamping jaw can still clamp the workpiece and the workpiece is not easy to damage.

Preferably, one end of the first spring is connected to the end face of the moving plate facing the second cavity, and the other end of the first spring vertically extends towards the inner end face of the chuck body.

Through the technical scheme, after the first spring is converted from the compression state to the extension state, the moving plate moves to one side of the first cavity, the first spring is separated from the contact with the inner end face of the chuck body, and the first spring cannot pull the moving plate to move to the first cavity again due to inertia secondary compression, so that the braking of the moving plate is accelerated.

Preferably, the chuck body is internally provided with a plurality of guide rods, two ends of each guide rod are respectively connected to two inner end faces of the chuck body, the guide rods are in one-to-one correspondence with the first springs, and the guide rods vertically penetrate through the movable plate and the corresponding first springs.

Through above-mentioned technical scheme, the homoenergetic moves along corresponding guide bar during extension and the compression of first spring, makes the elasticity of first spring can.

Preferably, a buffer pad is arranged at one end of the first spring, which is far away from the moving plate.

Through above-mentioned technical scheme, the collision power that produces when reducing the contact between first spring and the chuck body inner end face prolongs the life of first spring.

Preferably, the guide plate is sleeved with a second spring at one end of the first cavity, and one end of the second spring is connected to the moving plate.

Through above-mentioned technical scheme, the work piece is accomplished the processing back, from the interior compressed air or the compressed liquid of sucking out of first cavity, and first spring loses the extrusion force, and the elasticity of first spring makes the movable plate move to first cavity one side. When the elastic force of the first spring is larger, the second spring contacts the inner end face of the chuck body on the corresponding side and generates elastic force, and the second spring offsets part of the elastic force of the first spring on the moving plate to accelerate the stop of the moving plate.

Preferably, the guide bar is located at a middle position between the outer ring and the inner ring of the moving plate.

Through the technical scheme, the distances from the guide rods to the inner ring and the outer ring of the corresponding side of the moving plate are close, and the elastic force of the first spring on the moving plate can be uniformly dispersed to the two sides of the inner ring and the outer ring of the moving plate, so that the stress of the moving plate is balanced.

Preferably, the chuck further comprises a dustproof piece, the dustproof piece covers the convex wedge and the piston, and the dustproof piece is connected with the chuck body.

Through above-mentioned technical scheme, the piece that the dust piece blocked work piece production in the cutting process gets into the junction of convex wedge and piston, reduces the influence of being connected between piston and the slider.

Preferably, the end face of the dust-proof part, which faces away from the piston, is provided with a tip.

Through the technical scheme, the workpiece is conveniently positioned, so that the clamping jaws can accurately clamp.

To sum up, the utility model discloses the beneficial effect who contrasts in prior art does: when maintaining efficient clamping efficiency, the setting of first spring can reduce the jack catch and press from both sides the damage that the work piece caused when pressing from both sides tight work piece.

Drawings

FIG. 1 is a sectional view of the embodiment;

FIG. 2 is an enlarged view of A in FIG. 1;

fig. 3 is a top view of the embodiment.

Reference numerals: 1. a chuck body; 11. a first chamber; 12. a second chamber; 13. a first channel; 14. a second channel; 2. a piston; 3. moving the plate; 4. a slider; 41. a convex wedge; 5. a claw; 6. a cushion pad; 7. a guide rod; 71. a first spring; 72. a second spring; 8. A fluid pipe; 9. a dust-proof member; 91. and (4) a tip.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides an interior concealed chuck, as shown in figure 1, including the chuck body 1 that has the cavity, set up dustproof 9 in the chuck body 1, sliding connection is at the piston 2 on the lateral wall of dustproof 9 circumference, and the cross section of dustproof 9 is the T type, and the great one end of dustproof 9 width is in outside the chuck body 1 and through countersunk head bolted connection on the terminal surface of chuck body 1, is connected with top 91 on the terminal surface that the dustproof 9 deviates from the chuck body 1. Referring to fig. 3, the chuck body 1 is provided with three sliders 4 which are uniformly distributed around the center 91 in the circumferential direction, the sliders 4 are movably connected to the chuck body 1, and the sliders 4 are fixedly connected with clamping jaws 5. Referring to fig. 1, a convex wedge 41 is arranged on the end portion, facing the center 91, of the sliding block 4, the convex wedge 41 and the sliding block 4 are integrally formed, the end face, facing the center 91, of the convex wedge 41 is an inclined face, the inclined face faces one side of the chuck body 1, one end of the piston 2 is located outside the chuck body 1, three inclined grooves are formed in the circumferential side wall of the end portion, the three inclined grooves are respectively connected with the convex wedges 41 of the three sliding blocks 4 in a matched mode, and the connecting position of the sliding block 4 and the piston 2 is tightly attached to the lower end face of the end portion, with the width. Only the piston 2 needs to be moved, the sliding block 4 can be driven to move towards one side of the tip 91, and therefore the three clamping jaws 5 can clamp a workpiece simultaneously.

Referring to fig. 1, a moving plate 3 is arranged on the outer side wall of the piston 2, the moving plate 3 is fixedly connected to the piston 2, and the moving plate 3 is transversely intercepted in the cavity of the chuck body 1 and divides the cavity into a first cavity 11 close to the jaws 5 and a second cavity 12 far away from the jaws 5. Sealing rings are arranged between the inner side walls of the moving plate 3 and the chuck body 1, between the outer side walls of the moving plate 3 and the piston 2 and between the inner side walls of the piston 2 and the chuck body 1, so that the first cavity 11 is in a relatively sealed state. The chuck comprises a chuck body 1, and is characterized in that a first channel 13 communicated with a first cavity 11 and a second channel 14 communicated with a second cavity 12 are arranged on the chuck body 1, the first channel 13 and the second channel 14 are both provided with openings on the outer side wall of the chuck body 1, the second channel 14 is directly communicated with the outside through the openings, a fluid pipe 8 is arranged on the opening position of the first channel 13, and a valve for controlling the circulation of fluid is arranged on the fluid pipe. Through fluid pipe 8, can inject compressed air or compressed liquid into first cavity 11, the extrusion movable plate 3 moves to second cavity 12 one side, and piston 2 drives slider 4 thereupon and removes to make jack catch 5 carry out centre gripping and the clamp force is big to the work piece.

Referring to fig. 1 and 2, a plurality of guide rods 7 penetrating through the moving plate 3 are arranged in a cavity of the chuck body 1, the guide rods 7 are uniformly distributed around the dust-proof piece 9, the guide rods 7 are all positioned in the middle position between the outer ring and the inner ring of the moving plate 3, and a sealing ring is arranged between the guide rods 7 and the moving plate 3. A first spring 71 and a second spring 72 are respectively sleeved at two ends of the guide rod 7, the first springs 71 are both positioned in the second chamber 12, one end of each first spring 71 is connected to the end surface, facing the second chamber 12, of the moving plate 3, the other end of each first spring 71 vertically extends to one side departing from the first chamber 11, and a cushion pad 6 is arranged at the end part of each first spring 71; the second springs 72 are all located in the first chamber 11, one end of each second spring 72 is also connected to the moving plate 3, and the other end of each second spring 72 extends to the side away from the second chamber 12 and is also provided with a cushion 6.

In the actual operation process, compressed air or compressed liquid is injected into the first cavity 11, the moving plate 3 is extruded to move towards the second cavity 12, the first spring 71 is in contact with the inner end face of the chuck body 1 and is compressed to deform, the first spring 71 generates elastic force and offsets part of power of the moving plate 3, the moving plate 3 drives the piston 2 to be away from the clamping jaws 5, and the sliding block 4 moves towards the chuck body 1 due to the connection between the convex wedges 41 and the piston 2, so that the clamping jaws 5 clamp a workpiece. After the workpiece is machined, compressed air or compressed liquid is sucked out from the first chamber 11, the first spring 71 loses the extrusion force, and the moving plate 3 moves to the first chamber 11 side due to the elastic force of the first spring 71. When the first spring 71 is pressed to a large extent, the moving distance of the moving plate 3 is also large, the second spring 72 contacts the inner end surface of the chuck body 1 on the corresponding side, the second spring 72 is pressed to generate elastic force, and the second spring 72 offsets the elastic force of the first spring 71 on the moving plate 3, so that the moving plate 3 is stopped quickly. The jaw 5 can be moved quickly in a pneumatic or hydraulic mode, clamping efficiency is improved, and damage to the workpiece caused by the jaw 5 when the workpiece is clamped can be reduced due to the arrangement of the first spring 71.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. The utility model provides an interior concealed chuck, includes chuck body (1) that contains the cavity, sets up piston (2) in chuck body (1), connects movable plate (3) on piston (2) lateral wall, slider (4) of sliding connection on chuck body (1) terminal surface, installs jack catch (5) on slider (4), first cavity (11) and second cavity (12) are separated into with the cavity of chuck body (1) to movable plate (3), first cavity (11) are closer to jack catch (5) than second cavity (12), be equipped with convex wedge (41) on slider (4) the terminal surface towards chuck body (1) center, be equipped with on the lateral wall of piston (2) with convex wedge (41) sliding fit's chute, characterized by: be equipped with first passageway (13), second passageway (14) on chuck body (1), first passageway (13) and second passageway (14) are equipped with the opening on the outer wall of chuck body (1), first passageway (13) and first cavity (11) intercommunication, second passageway (14) and second cavity (12) intercommunication, opening connection of first passageway (13) on the lateral wall of chuck body (1) has fluid pipe (8) of valve, first cavity (11) are sealed setting, be equipped with a plurality of first springs (71) in second cavity (12), a plurality of first springs (71) are around the central evenly distributed of chuck body (1), and first spring (71) elasticity sets up between the interior terminal surface of movable plate (3) and chuck body (1).

2. The concealed chuck according to claim 1, wherein: one end of the first spring (71) is connected to the end face, facing the second cavity (12), of the moving plate (3), and the other end of the first spring (71) vertically extends towards the inner end face of the chuck body (1).

3. The concealed chuck according to claim 2, wherein: be equipped with a plurality of guide bars (7) in chuck body (1), the both ends of guide bar (7) are connected respectively on two interior terminal surfaces of chuck body (1), a plurality of guide bars (7) and a plurality of first spring (71) one-to-one, movable plate (3) and corresponding first spring (71) are run through perpendicularly to guide bar (7).

4. The concealed chuck according to claim 2, wherein: a buffer pad (6) is arranged at one end of the first spring (71) far away from the moving plate (3).

5. The concealed chuck according to claim 3, wherein: the guide rod (7) is sleeved with a second spring (72) at one end of the first cavity (11), and one end of the second spring (72) is connected to the moving plate (3).

6. The concealed chuck according to claim 3, wherein: the guide rod (7) is arranged at the middle position between the outer ring and the inner ring of the moving plate (3).

7. The concealed chuck according to claim 1, wherein: the chuck is characterized by further comprising a dustproof piece (9), wherein the dustproof piece (9) covers the convex wedge (41) and the piston (2), and the dustproof piece (9) is connected with the chuck body (1).

8. The concealed chuck according to claim 7, wherein: and the end surface of the dustproof part (9) departing from the piston (2) is provided with a tip (91).