CN-122007938-A - Frock clamp of eccentric shaft processing for hydraulic motor

CN122007938ACN 122007938 ACN122007938 ACN 122007938ACN-122007938-A

Abstract

The invention discloses a fixture for machining an eccentric shaft of a hydraulic motor, and belongs to the technical field of fixtures. The technical scheme includes that the fixture clamp for machining the eccentric shaft of the hydraulic motor comprises a fixed pipe fitting, one side of the fixed pipe fitting is provided with a regulating mechanism, the regulating mechanism is provided with a straight rack, an inner fixed pipe is fixed in the fixed pipe fitting, a gear assembly is rotatably sleeved on the inner fixed pipe, an opening is formed in one side of the fixed pipe fitting, the straight rack penetrates through the opening and is meshed with the gear assembly, the regulating mechanism drives the straight rack to slide to drive the gear assembly to rotate, the linkage mechanism converts rotation into linear motion of a screw rod part to achieve clamping and positioning, the eccentric mechanism adjusts the position of the fixed pipe fitting to adjust the eccentricity, and the problems of low positioning accuracy, uneven clamping force and inconvenience in adjustment of the eccentricity in the prior art are solved, high-precision clamping and positioning and adjustment of the eccentricity are achieved, and machining efficiency and product quality are improved.

Inventors

ZHONG YING
Wen Zuming
WANG PEIJUN
Gao Puwen
SONG LUYU
LIU JUNQI

Assignees

宁波欧易液压有限公司

Dates

Publication Date: 20260512
Application Date: 20260323

Claims (10)

1. The utility model provides a frock clamp for eccentric shaft processing for hydraulic motor, includes fixed pipe fitting (1), its characterized in that, one side of fixed pipe fitting (1) is equipped with regulation and control mechanism, be equipped with straight rack (2) on the regulation and control mechanism, fixed pipe fitting (1) internal fixation has interior fixed pipe (15), gear assembly (6) have been cup jointed in the rotation on interior fixed pipe (15), opening (14) have been seted up to one side of fixed pipe fitting (1), straight rack (2) run through opening (14) and mesh with gear assembly (6); A connecting pipe (11) is arranged on one side of the fixed pipe fitting (1), a linkage mechanism is arranged on the connecting pipe (11), the linkage mechanism is connected with the gear assembly (6), a screw rod piece (12) is arranged on the linkage mechanism, and an abutting piece (8) is fixed at one end of the screw rod piece (12) extending into the inner fixed pipe (15); The rear end of the fixed pipe fitting (1) is provided with an eccentric mechanism.
2. The fixture for machining the eccentric shaft for the hydraulic motor according to claim 1, wherein the regulating mechanism is used for driving the gear assembly (6) to rotate, and the straight rack (2) is driven to slide up and down through the regulating mechanism to drive the gear assembly (6) to stably rotate on the inner fixed tube (15).
3. The fixture for machining the eccentric shaft of the hydraulic motor according to claim 1, wherein the linkage mechanism is used for converting rotation of the gear assembly (6) into linear motion of the screw member (12), and the abutting member (8) is used for clamping and positioning the eccentric shaft through the linear motion of the screw member (12).
4. The fixture for machining the eccentric shaft of the hydraulic motor according to claim 1, wherein the eccentric mechanism is used for adjusting the machining eccentricity of the eccentric shaft, and the position of the fixed pipe fitting (1) is adjusted through the eccentric mechanism, so that the machining eccentricity precision of the eccentric shaft is adjusted.
5. The fixture for machining the eccentric shaft for the hydraulic motor according to claim 4, wherein the eccentric mechanism comprises a moving frame (18) arranged at the rear end of the fixed pipe fitting (1), an adjusting screw (19) is rotationally sleeved on the moving frame (18), a moving block (20) is sleeved on the adjusting screw (19) in a threaded manner, the moving block (20) is slidably mounted in the moving frame (18), the moving block (20) is fixedly connected with the fixed pipe fitting (1), and the moving block (20) is driven to slide in the moving frame (18) through rotating the adjusting screw (19), so that the fixed pipe fitting (1) is driven to synchronously move, and the eccentric distance is accurately adjusted.
6. The fixture for machining the eccentric shaft of the hydraulic motor according to claim 1 is characterized in that a fixing ring (21) is fixed at the rear end of the fixing pipe fitting (1), the fixing ring (21) is fixedly connected with the inner fixing pipe (15) and used for improving the installation stability of the inner fixing pipe (15) in the fixing pipe fitting (1), a plurality of fixing plates (17) are arranged at the front end of the fixing pipe fitting (1) at equal intervals, the fixing plates (17) are fixedly connected with the inner fixing pipe (15), the inner fixing pipe (15) is further reinforced, shaking is avoided in the machining process, and the machining precision of the eccentric shaft is guaranteed.
7. The fixture for machining the eccentric shaft for the hydraulic motor according to claim 2, wherein a plurality of fixing blocks (16) are arranged on the inner fixing tube (15) at equal intervals, an annular groove (7) is formed in the inner peripheral side wall of the gear assembly (6), the plurality of fixing blocks (16) are arranged in the annular groove (7), the gear assembly (6) is guided and limited through sliding fit of the fixing blocks (16) and the annular groove (7), stable rotation of the gear assembly (6) on the inner fixing tube (15) is ensured, deviation is avoided, and transmission stability of a linkage mechanism is ensured.
8. The fixture for machining the eccentric shaft of the hydraulic motor according to claim 1, wherein the adjusting mechanism comprises a support frame (3) fixed on one side of the fixed pipe fitting (1), a guide hole is formed in the support frame (3), a screw rod piece (5) is slidably installed in the guide hole, the lower end of the screw rod piece (5) is fixed at the upper end of the straight rack (2), two nut pieces (4) are sleeved on the screw rod piece (5) in a threaded manner, the two nut pieces (4) are respectively arranged at the upper end and the lower end of the support frame (3), the screw rod piece (5) is fixed on the support frame (3) by screwing the two nut pieces (4), the position of the straight rack (2) is fixed, the rotating state of the gear assembly (6) is locked, and the clamping stability is guaranteed.
9. The fixture for machining the eccentric shaft of the hydraulic motor according to claim 3, wherein the linkage mechanism comprises a screw nut (9) which is rotationally sleeved on the connecting pipe (11), a bevel gear (10) is fixed on the screw nut (9), an end tooth disc (23) is fixed on one side of the gear assembly (6), the bevel gear (10) is meshed with the end tooth disc (23), the screw member (12) is slidably installed in the connecting pipe (11), the screw member (12) is in threaded sleeve connection in the screw nut (9), when the gear assembly (6) rotates, the end tooth disc (23) is driven to synchronously rotate, the end tooth disc (23) drives the bevel gear (10) to rotate, and then the screw nut (9) is driven to rotate, so that the screw member (12) moves linearly along the connecting pipe (11), and the abutting member (8) is driven to approach or separate from the eccentric shaft, so that clamping or loosening actions are realized.
10. The fixture for machining the eccentric shaft of the hydraulic motor according to claim 9 is characterized in that a sliding groove (22) is formed in one side of the screw rod piece (12), a sliding block (13) is arranged in the sliding groove (22) in a sliding mode, the sliding block (13) penetrates through the side wall of the connecting pipe (11) and is fixedly connected with the connecting pipe (11), the sliding block (13) is in sliding fit with the sliding groove (22) to guide and limit the screw rod piece (12), the screw rod piece (12) is prevented from synchronously rotating along with a screw rod nut (9), smooth linear movement of the screw rod piece (12) is guaranteed, the three connecting pipes (11) are arranged on one side of the fixed pipe (1) at equal intervals, the three abutting pieces (8) are arranged in an arc shape, distribution tracks are circular, the arc faces inwards fix the axis of the pipe (15), and the axis of the screw rod piece (12) and the center of the inner fixed pipe (15) are overlapped.

Description

Frock clamp of eccentric shaft processing for hydraulic motor Technical Field The invention belongs to the technical field of tool clamps, and particularly relates to a tool clamp for machining an eccentric shaft of a hydraulic motor. Background The eccentric shaft of the hydraulic motor is used as a core component of the power conversion system, and the geometric accuracy of the eccentric shaft is directly related to the transmission efficiency and the service life of the hydraulic motor. Because the axial lead of the eccentric shaft and the rotation central line have inherent offset, in the precision machining links such as turning, grinding and the like, the fixture clamp must ensure extremely high positioning reference stability and even distribution of clamping force so as to avoid energy loss or mechanical failure caused by machining errors. However, the existing eccentric shaft machining clamp faces multiple technical challenges in practical application, the traditional clamping mechanism generally adopts a manual bolt adjusting mode, the operation flow is long, manual adjustment deviation is very easy to introduce, the positioning accuracy of a shaft piece cannot meet the micrometer tolerance requirement, the design defect of a clamping force transmission structure causes unbalanced stress distribution of the eccentric shaft in the clamping process, the local area bears overlarge concentrated stress, elastic deformation and even plastic damage, the machining rejection rate is remarkably improved, the eccentric distance adjusting mechanism is insufficient in accuracy and poor in universality, special clamps are required to be redesigned for eccentric shafts of different specifications, the production preparation period is prolonged, the input and maintenance cost of enterprise equipment is greatly increased, the rigidity of a connecting structure of a core supporting component such as a fixed pipe fitting and an inner pipe is weak, tiny displacement is easy to generate in a high-speed machining vibration environment, abrasion is aggravated after long-term use, the overall stability of the clamp is reduced, the service life is shortened, and the maintenance frequency is increased. Although some improved clamps try to integrate a linkage structure, the transmission efficiency is low, the adjustment process is tedious and time-consuming, the balance of the machining precision and the production efficiency is difficult to coordinate, and the large-scale industrial production requirement of the hydraulic motor cannot be supported. Disclosure of Invention The invention provides a fixture for machining an eccentric shaft of a hydraulic motor, which aims to solve at least one of the technical problems. The technical scheme adopted by the invention is as follows: The fixture comprises a fixed pipe fitting, wherein one side of the fixed pipe fitting is provided with a regulating mechanism, the regulating mechanism is provided with a straight rack, an inner fixed pipe is fixed in the fixed pipe fitting, a gear assembly is rotatably sleeved on the inner fixed pipe, one side of the fixed pipe fitting is provided with an opening, and the straight rack penetrates through the opening and is meshed with the gear assembly; a connecting pipe is arranged on one side of the fixed pipe fitting, a linkage mechanism is arranged on the connecting pipe and connected with the gear set piece, a screw rod piece is arranged on the linkage mechanism, and an abutting piece is fixed at one end of the screw rod piece extending into the inner fixed pipe; The rear end of the fixed pipe fitting is provided with an eccentric mechanism. Furthermore, the application also provides a regulating mechanism which is used for driving the gear assembly to rotate, and the regulating mechanism drives the straight rack to slide up and down to drive the gear assembly to stably rotate on the inner fixed pipe. Furthermore, the application also provides that the linkage mechanism is used for converting the rotation of the gear assembly into the linear motion of the screw rod piece, and the abutting piece realizes the clamping and positioning of the eccentric shaft through the linear motion of the screw rod piece. Furthermore, the application also provides that the eccentric mechanism is used for adjusting the machining eccentricity of the eccentric shaft, and the position of the fixed pipe fitting is adjusted through the eccentric mechanism, so that the machining eccentricity precision of the eccentric shaft is adjusted. Furthermore, the application also provides that the eccentric mechanism comprises a moving frame arranged at the rear end of the fixed pipe fitting, an adjusting screw is sleeved in the moving frame in a rotating way, a moving block is sleeved on the adjusting screw in a threaded way, the moving block is slidably arranged in the moving frame, the moving block is fixedly connected with the fixed pipe fitting, and the moving block is driv