CN215968002U

CN215968002U - Hydraulic inner hole expansion clamping device

Info

Publication number: CN215968002U
Application number: CN202121701574.3U
Authority: CN
Inventors: 蔡禄高; 谢政铨; 陈灵珊; 俞冬亮
Original assignee: Longgong Fujian Hydraulic Co ltd
Current assignee: Longgong Fujian Hydraulic Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-03-08
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a hydraulic inner hole expansion clamping device, and relates to the technical field of workpiece processing auxiliary equipment. The following scheme is now proposed: the cylinder comprises a cylinder body, the fixed cover of cavity wall of cylinder body is equipped with the uide bushing, the cavity internalization of cylinder body is pegged graft and is had the piston rod, and the outer wall of piston rod and the inner ring wall of uide bushing laminate mutually, the top periphery of piston rod is equipped with the awl core cover through the fixed cover of hexagonal thick nut, and the fixed cover in bottom periphery of piston rod is equipped with the piston rod end cover, and the outer rampart of piston rod end cover and the cavity wall laminating of cylinder body mutually, the outer wall of cylinder body is seted up and is linked together with the cavity in the cylinder body and be located the oil feed passageway between uide bushing and the piston rod end cover, the oil return passageway that is linked together with cavity in the cylinder body is seted up to the bottom outer wall of cylinder body. The clamping device solves the problem that the existing clamping device is difficult to clamp and position the circular workpiece.

Description

Hydraulic inner hole expansion clamping device

Technical Field

The utility model relates to the technical field of auxiliary equipment for workpiece processing, in particular to a hydraulic inner hole expansion clamping device.

Background

In order to maintain the stability of the workpiece during machining, a clamping device is required to clamp the workpiece before machining. When an outer ring of an annular workpiece needs to be polished and the like, due to the structural particularity of the annular workpiece, the conventional clamping device is difficult to stably clamp and fix the annular workpiece, and therefore, a hydraulic inner hole expansion clamping device is provided.

SUMMERY OF THE UTILITY MODEL

Objects of the utility model

In view of the above, the present invention provides a hydraulic inner hole expansion clamping device to automatically clamp and fix an annular workpiece.

(II) technical scheme

In order to achieve the technical purpose, the utility model provides a hydraulic inner hole expansion clamping device which comprises a cylinder body, wherein a guide sleeve is fixedly sleeved on a cavity wall of the cylinder body, a piston rod is movably inserted into the cavity of the cylinder body, the outer wall of the piston rod is attached to an inner ring wall of the guide sleeve, a conical core sleeve is fixedly sleeved on the periphery of the top end of the piston rod through a hexagonal thick nut, a piston rod bottom sleeve is fixedly sleeved on the periphery of the bottom end of the piston rod, an outer ring wall of the piston rod bottom sleeve is attached to the cavity wall of the cylinder body, an oil inlet channel which is communicated with the cavity in the cylinder body and is positioned between the guide sleeve and the piston rod bottom sleeve is formed in the outer wall of the cylinder body, and an oil return channel which is communicated with the cavity in the cylinder body is formed in the outer wall of the bottom of the cylinder body.

Preferably, the outer wall of the cylinder body is fixedly connected with an oil inlet pipe, and the oil inlet pipe is communicated with the oil inlet channel.

Preferably, the outer wall of the cylinder body is fixedly connected with an oil return pipe, and the oil return pipe is communicated with the oil return channel.

Preferably, the top of the cylinder body is movably provided with an expansion sleeve, and the piston rod movably penetrates through the hollow part in the middle of the expansion sleeve.

Preferably, the outer wall of the expansion sleeve is fixedly sleeved with a resistance ring, and the periphery of the resistance ring is provided with a circular workpiece.

Preferably, a circular groove a is formed in the top of the cylinder body, a fixing ring a is installed inside the circular groove a, and the fixing ring a is fixedly sleeved on the periphery of the guide sleeve.

Preferably, the inner chamber wall of uide bushing has down seted up circular groove b, circular groove c, circular groove d, circular groove e from last in proper order, inside dust ring, the axle seal circle, buffer ring, the supporting ring a of installing respectively of circular groove b, circular groove c, circular groove d, circular groove e.

Preferably, the bottom of the outer ring wall of the guide sleeve is provided with a circular groove f, and a fixing ring b is arranged in the circular groove f.

Preferably, the outer ring wall of the piston rod bottom sleeve is provided with a ring groove g and two ring grooves h, and a support ring b and a piston seal ring are respectively arranged in the ring groove g and the two ring grooves h.

Compared with the prior art, the utility model has the beneficial effects that:

(1): through oiling in the oil inlet pipe, the piston rod and the conical core sleeve are driven to descend under the action of oil pressure, so that the expansion sleeve is extruded to be opened, the workpiece is clamped by radial force, and the purpose of automatically clamping the annular workpiece is achieved. Through returning oil in the oil return pipe, the piston rod and the conical core sleeve are driven to ascend under the action of oil pressure, and the expansion sleeve retracts, so that the effect of loosening the circular workpiece is achieved, the whole process is simple to operate, and the automation degree is high.

(2): through the components such as retainer plate a, dust ring, the sealing washer for the axle that set up, buffering circle, can play good sealed dustproof effect for the stability of device operation is better.

Drawings

FIG. 1 is a front elevation cut-away view of one embodiment of the present invention;

FIG. 2 is a schematic perspective view of a piston rod according to the present invention;

fig. 3 is a schematic perspective view of the expansion sleeve of the present invention.

Description of the drawings: 1. a cylinder body; 2. a guide sleeve; 3. a piston rod; 4. a conical core sleeve; 5. a hexagonal thick nut; 6. a piston rod bottom sleeve; 7. an oil return pipe; 8. an oil inlet pipe; 9. an expansion sleeve; 10. a resistance ring; 11. a circular workpiece; 12. a fixed ring a; 13. a dust ring; 14. a seal ring for a shaft; 15. a buffer ring; 16. a supporting ring a; 17. a fixed ring b; 18. a piston seal ring; 19. and (b) a supporting ring.

Detailed Description

As shown in fig. 1, a hydraulic inner hole expansion clamping device comprises a cylinder body 1, a guide sleeve 2 is fixedly sleeved on the cavity wall of the cylinder body 1, a piston rod 3 is movably inserted in the cavity of the cylinder body 1, and the outer wall of the piston rod 3 is attached to the inner ring wall of the guide sleeve 2; the top of the cylinder body 1 is provided with an annular groove a, a fixed ring a12 is arranged in the annular groove a, a fixed ring a12 is fixedly sleeved on the periphery of the guide sleeve 2, and the fixed ring a12 plays a role in fixing the guide sleeve 2 and preventing the guide sleeve 2 from being separated from the cavity in the cylinder body 1; the inner cavity wall of the guide sleeve 2 is sequentially provided with an annular groove b, an annular groove c, an annular groove d and an annular groove e from top to bottom, and the inner parts of the annular groove b, the annular groove c, the annular groove d and the annular groove e are respectively provided with a dust ring 13, a shaft sealing ring 14, a buffer ring 15 and a support ring a 16; the bottom of the outer ring wall of the guide sleeve 2 is provided with a ring groove f, and a fixed ring b17 is arranged in the ring groove f.

Referring to fig. 1 and 2, a cone core sleeve 4 is fixedly sleeved on the periphery of the top end of the piston rod 3 through a hexagonal thick nut 5.

Referring to fig. 1: a piston rod bottom sleeve 6 is fixedly sleeved on the periphery of the bottom end of the piston rod 3, the outer ring wall of the piston rod bottom sleeve 6 is attached to the cavity wall of the cylinder body 1, a ring groove g and two ring grooves h are formed in the outer ring wall of the piston rod bottom sleeve 6, and a supporting ring b19 and a piston sealing ring 18 are respectively arranged in the ring groove g and the two ring grooves h; an oil inlet channel which is communicated with the cavity in the cylinder body 1 and is positioned between the guide sleeve 2 and the piston rod bottom sleeve 6 is formed in the outer wall of the cylinder body 1, an oil inlet pipe 8 is fixedly connected to the outer wall of the cylinder body 1, and the oil inlet pipe 8 is communicated with the oil inlet channel; an oil return channel communicated with the cavity in the cylinder body 1 is formed in the outer wall of the bottom of the cylinder body 1, an oil return pipe 7 is fixedly connected to the outer wall of the cylinder body 1, and the oil return pipe 7 is communicated with the oil return channel.

With reference to fig. 1 and 3: the top of the cylinder body 1 is movably provided with an expansion sleeve 9, the piston rod 3 movably penetrates through the hollow part in the middle of the expansion sleeve 9, the outer wall of the expansion sleeve 9 is fixedly sleeved with a resistance ring 10, and the periphery of the resistance ring 10 is provided with a circular workpiece 11.

The working principle is as follows: first place ring form work piece 11 in the periphery of resistance ring 10, then to the oil delivery in advancing oil pipe 8, hydraulic oil gets into the position that lies in between uide bushing 2 and piston rod end cover 6 in the cavity in cylinder body 1 through oil feed passageway, drive piston rod end cover 6 under the oil pressure effect, piston rod 3, the whole decline of awl core cover 4, awl core cover 4 extrudes inflation cover 9 middle part hollow region downwards, make inflation cover 9 inflation open, thereby extrusion resistance ring 10 supports ring form work piece 11 inner ring wall, ring form work piece 11 will receive radial force chucking, thereby reach the purpose of the ring form work piece of self-holding ring form. In the same way, the piston rod 3 and the conical core sleeve 4 are driven to ascend under the action of oil pressure through returning oil in the oil return pipe 7, and the expansion sleeve 9 retracts, so that the effect of loosening the circular ring-shaped workpiece is achieved, the whole process is simple to operate, the use is convenient, and the practicability of the device is improved.

Exemplary embodiments of the proposed solution of the present disclosure have been described in detail above with reference to preferred embodiments, however, it will be understood by those skilled in the art that many variations and modifications may be made to the specific embodiments described above, and that many combinations of the various technical features and structures presented in the present disclosure may be made without departing from the concept of the present disclosure, without departing from the scope of the present disclosure, which is defined by the appended claims.

Claims

1. A hydraulic inner hole expansion clamping device comprises a cylinder body (1) and is characterized in that a guide sleeve (2) is fixedly sleeved on the cavity wall of the cylinder body (1), a piston rod (3) is movably inserted in the cavity of the cylinder body (1), the outer wall of the piston rod (3) is attached to the inner ring wall of the guide sleeve (2), a conical core sleeve (4) is fixedly sleeved on the periphery of the top end of the piston rod (3) through a hexagonal thick nut (5), a piston rod bottom sleeve (6) is fixedly sleeved on the periphery of the bottom end of the piston rod (3), and the outer ring wall of the piston rod bottom sleeve (6) is attached to the cavity wall of the cylinder body (1), the outer wall of the cylinder body (1) is provided with an oil inlet channel which is communicated with the inner cavity of the cylinder body (1) and is positioned between the guide sleeve (2) and the piston rod bottom sleeve (6), and an oil return channel communicated with the cavity in the cylinder body (1) is formed in the outer wall of the bottom of the cylinder body (1).

2. The hydraulic inner hole expansion clamping device is characterized in that an oil inlet pipe (8) is fixedly connected to the outer wall of the cylinder body (1), and the oil inlet pipe (8) is communicated with an oil inlet channel.

3. The hydraulic bore expansion clamping device is characterized in that an oil return pipe (7) is fixedly connected to the outer wall of the cylinder body (1), and the oil return pipe (7) is communicated with an oil return channel.

4. The hydraulic inner hole expansion clamping device is characterized in that an expansion sleeve (9) is movably arranged at the top of the cylinder body (1), and the piston rod (3) movably penetrates through the hollow part in the middle of the expansion sleeve (9).

5. The hydraulic inner hole expansion clamping device is characterized in that a resistance ring (10) is fixedly sleeved on the outer wall of the expansion sleeve (9), and an annular workpiece (11) is arranged on the periphery of the resistance ring (10).

6. The hydraulic inner hole expansion clamping device is characterized in that an annular groove a is formed in the top of the cylinder body (1), a fixed ring a (12) is installed in the annular groove a, and the fixed ring a (12) is fixedly sleeved on the periphery of the guide sleeve (2).

7. The hydraulic inner hole expansion clamping device is characterized in that an annular groove b, an annular groove c, an annular groove d and an annular groove e are sequentially formed in the inner cavity wall of the guide sleeve (2) from top to bottom, and a dustproof ring (13), a shaft sealing ring (14), a buffer ring (15) and a support ring a (16) are respectively mounted inside the annular groove b, the annular groove c, the annular groove d and the annular groove e.

8. The hydraulic inner hole expansion clamping device is characterized in that the bottom of the outer ring wall of the guide sleeve (2) is provided with an annular groove f, and a fixing ring b (17) is arranged in the annular groove f.

9. The hydraulic inner hole expansion clamping device is characterized in that the outer ring wall of the piston rod bottom sleeve (6) is provided with a ring groove g and two ring grooves h, and a supporting ring b (19) and a piston sealing ring (18) are respectively arranged in the ring groove g and the two ring grooves h.