Positioning clamp for bearing machining

Abstract

The utility model discloses a positioning fixture for bearing processing, which relates to the technical field of bearing fixtures and comprises a processing table, four groups of clamping frame components are assembled at the top of the processing table, a mounting cavity is reserved in the processing table, and a driving motor for driving the four groups of clamping frame components to gather inwards is assembled in the mounting cavity; the clamping frame assembly comprises a clamping frame arranged at the top of the machining table in a sliding mode, a plurality of sets of stepped openings are formed in the top of the clamping frame, and heightening pieces are fixed to the positions, close to the internal corners, of the transverse surfaces of the stepped openings. The size range of a clamped bearing is enlarged through the stepped openings formed in the clamping frames, the clamping modes of the inner wall and the outer wall of the bearing are replaced, the flexibility of the clamp is better, the abutting blocks can extend out of each set of clamping frames to cope with the situation that ball grooves exist in the inner wall of the bearing, the contact area between the abutting blocks and the ball grooves is sufficient, and the service life of the bearing is prolonged. Therefore, the clamping stability of the bearing with the rolling-out groove is ensured, and finally the effect of high bearing machining quality is achieved.

Description

Technical Field

[0001] This utility model relates to the field of bearing fixture technology, specifically a positioning fixture for bearing processing. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical bodies, reduce the coefficient of friction during their movement, and ensure their rotational accuracy. During machining, bearings need to be clamped, which requires the use of positioning fixtures for bearing machining.

[0003] A search of the China Patent Network Announcement No. CN221337604U reveals a positioning fixture for easily adjustable bearing housing processing. This fixture can double-clamp and fix the inner and outer walls of the bearing housing by setting up limiting blocks and clamping blocks. When the motor is started, the motor drives the two limiting blocks to move outward relative to each other through the transmission component. The two limiting blocks move outward relative to each other and are fixed on both sides of the inner wall of the bearing housing. The two clamping blocks move inward relative to each other and clamp on both sides of the outer wall of the bearing housing. By doubly limiting the inner and outer walls of the bearing housing, the stability of the bearing housing clamping is increased.

[0004] The bearing is locked by two sets of clamping blocks and limiting blocks. As the size of the clamped bearing changes, the contact area between the clamping blocks and limiting blocks and the inner and outer walls of the bearing surface gradually decreases, which weakens the clamping force on the bearing. This causes the bearing to wobble and shift, thus reducing the processing efficiency. Therefore, a positioning fixture for bearing processing is proposed. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a positioning fixture for bearing processing, so as to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for bearing processing, comprising a processing table, four sets of clamping frame assemblies mounted on the top of the processing table, a pre-reserved mounting cavity in the processing table, and a drive motor for driving the four sets of clamping frame assemblies to converge towards the center mounted in the mounting cavity;

[0007] The clamping frame assembly includes a clamping frame that is slidably mounted on the top of the processing table. The top of the clamping frame has multiple sets of stepped openings. Each set of stepped openings has a raised piece fixed on its horizontal surface near the inside corner. The clamping frame has a transmission groove that extends to the outside of the clamping frame. A drive screw that extends to the outside of the transmission groove is rotatably mounted in the transmission groove. Multiple sets of traction arms are threaded onto the outer wall of the drive screw. Each set of traction arms has a stop block fixed on its side near the top. Each set of stepped openings has a clearance groove that communicates with the transmission groove and allows the anti-slip groove to extend. Multiple sets of anti-slip grooves are evenly spaced on the side of the stop block away from the traction arm.

[0008] As a preferred technical solution, the vertical surface of the stepped opening is provided with anti-slip texture corresponding to the anti-slip groove.

[0009] As a preferred technical solution, the outer wall of the clamping frame is provided with a through hole that communicates with the transmission groove, and the inner wall of the through hole is provided with a matching internal thread at the contact position with the outer wall of the drive screw.

[0010] As a preferred technical solution, each set of clamping frames has an arc-shaped opening on the side that is close to each other, and the force surface of the stepped opening is arc-shaped.

[0011] As a preferred technical solution, the output end of the drive motor is connected to a moving plate, the top of the moving plate is fixed with a volute, and the top of the volute is slidably provided with a driven block that extends to the top of the processing table and is fixed to the bottom of the clamping frame.

[0012] As a preferred technical solution, the top of the processing table is provided with a stroke groove for the driven block to slide, and the bottom of the driven block is provided with a vortex groove that matches the vortex bar.

[0013] As a preferred technical solution, ear plates are fixed on the left and right outer walls of the processing table near the bottom, and a long straight groove for bolts to pass through is opened on the top of each set of ear plates.

[0014] In summary, the present invention has the following main advantages:

[0015] This utility model increases the range of bearing sizes that can be clamped by setting a stepped opening on the clamping frame, and allows for changing the clamping method for the inner and outer walls of the bearing, making the fixture more flexible. Each set of clamping frames can extend a stop block to deal with the situation where there are ball grooves on the inner wall of the bearing, so that the contact area between the two is sufficient, thereby ensuring the stability of the clamping of the bearing with ball grooves, and ultimately achieving a high-quality bearing processing effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the processing table of this utility model;

[0019] Figure 4 This is a schematic diagram of the drive motor and moving disc structure of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the clamping frame of this utility model;

[0021] Figure 6This is a schematic diagram of the internal structure of the clamping frame of this utility model.

[0022] In the diagram: 100, processing table; 200, clamping frame assembly;

[0023] 110. Ear plate; 120. Mounting cavity; 130. Drive motor; 140. Stroke groove; 150. Moving plate; 160. Scroll bar; 170. Driven block;

[0024] 210. Clamping frame; 211. Stepped opening; 212. Transmission groove; 213. Relief groove; 220. Arc-shaped opening; 230. Elevating piece; 240. Drive screw; 250. Abutment block; 260. Anti-slip groove; 270. Traction arm. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The embodiments of this utility model will be described below based on its overall structure.

[0027] A positioning fixture for bearing machining, such as Figures 1 to 6 As shown, it includes a processing table 100, four sets of clamping frame assemblies 200 are mounted on the top of the processing table 100, and a mounting cavity 120 is reserved inside the processing table 100. A drive motor 130 for driving the four sets of clamping frame assemblies 200 to converge in the center is installed in the mounting cavity 120.

[0028] The clamping frame assembly 200 includes a clamping frame 210 slidably mounted on the top of the processing table 100. The top of the clamping frame 210 has multiple sets of stepped openings 211. Each set of stepped openings 211 has a shim 230 fixed on its horizontal surface near the inside corner. The clamping frame 210 has a transmission groove 212 extending to the outside of the clamping frame 210. The transmission groove 212 has a drive screw 240 extending to the outside of the transmission groove 212. The outer wall of the drive screw 240 is threaded with multiple sets of traction arms 270. Each set of traction arms 270 has a stop block 250 fixed on its side near the top. Each set of stepped openings 211 has a clearance groove 213 that communicates with the transmission groove 212 and allows the anti-slip groove 260 to extend out. The side surface of the stop block 250 away from the traction arm 270 has multiple sets of anti-slip grooves 260 at equal intervals.

[0029] The output end of the drive motor 130 is connected to the moving plate 150. The top of the moving plate 150 is fixed with a volute 160. The top of the volute 160 is slidably provided with a driven block 170 that extends to the top of the processing table 100 and is fixed to the bottom of the clamping frame 210.

[0030] The top of the processing table 100 is provided with a stroke groove 140 for the driven block 170 to slide, and the bottom of the driven block 170 is provided with a vortex groove that matches the vortex bar 160.

[0031] The bearing to be processed is fitted onto the outer wall of the four sets of clamping frames 210. The appropriate height of the stepped opening 211 can be selected according to the inner diameter of the bearing. The output end of the drive motor 130 drives the rotating disk 150 to rotate. The vortex bar 160 at the top generates a corresponding force on the driven block 170. The four sets of clamping frames 210 can be relatively far apart or close together, so that each set of stepped openings 211 can meet the bearing within a certain size range, making the application range of the fixture wider. At the same time, the bearing can also be placed in the arc-shaped opening 220 between the four sets of clamping frames 210, which can clamp the outer wall of the bearing, thereby flexibly adjusting the processing of the inner and outer walls of the bearing.

[0032] To address the issue of ball grooves on the inner wall of the bearing's curved surface, the bearing can be first fitted onto the outer wall of the four sets of clamping frames 210. Then, the drive screw 240 inside each set of clamping frames 210 is rotated one by one, causing the traction arm 270 on its outer wall to move linearly. This causes the stop block 250 to extend from the relief groove 213 and enter the ball groove on the inner wall of the bearing. This increases the contact area with the inner wall of the bearing's curved surface, making the bearing with ball grooves more stable when clamped. The shim 230 creates a gap between the bottom of the bearing and the horizontal surface of the stepped opening 211, preventing the grinding tool from contacting it and protecting the clamping frame 210 and the tool.

[0033] Please refer to this carefully. Figure 4 The vertical surface of the stepped opening 211 is provided with anti-slip texture corresponding to the anti-slip groove 260.

[0034] Increase the coefficient of friction at the contact point with the inner wall of the bearing to ensure that the bearing is stably clamped and processed.

[0035] Please refer to this carefully. Figure 4 The outer wall of the clamping frame 210 has a through hole that communicates with the transmission groove 212, and the inner wall of the through hole has a matching internal thread at the contact position with the outer wall of the drive screw 240.

[0036] The internal thread on the inner wall of the channel locks the rotating drive screw 240, thereby locking the bearing in conjunction with the stop block 250.

[0037] Please refer to this carefully. Figure 4 and Figure 5 Each set of clamping frames 210 has an arc-shaped opening 220 on the side that is close to each other, and the force surface of the stepped opening 211 is arc-shaped.

[0038] This allows it to better fit the curved outer wall of the bearing, thus providing a better clamping and locking effect on the bearing.

[0039] Please refer to this carefully. Figure 1 Ear plates 110 are fixed on the left and right outer walls of the processing table 100 near the bottom. Each set of ear plates 110 has a long straight groove on the top for bolts to pass through.

[0040] By allowing the bolts to pass through the long straight groove and connect with external components, the machining table 100 can be fixed.

[0041] In use, the bearing to be processed is fitted onto the outer wall of the four sets of clamping frames 210, and the appropriate height of the stepped opening 211 can be selected according to the inner diameter of the bearing. The output end of the drive motor 130 drives the moving plate 150 to rotate, and the vortex bar 160 at the top generates a corresponding force on the driven block 170. The four sets of clamping frames 210 can be relatively far apart or close together, so that each set of stepped openings 211 can meet the bearings within a certain size range, making the application range of the fixture wider. At the same time, the bearing can also be placed in the arc-shaped opening 220 between the four sets of clamping frames 210, which can clamp the outer wall of the bearing, thereby flexibly adjusting the processing of the inner and outer walls of the bearing.

[0042] To address the issue of ball grooves on the inner wall of the bearing's curved surface, the bearing can be first fitted onto the outer wall of the four sets of clamping frames 210. Then, the drive screw 240 inside each set of clamping frames 210 is rotated one by one, causing the traction arm 270 on its outer wall to move linearly. This causes the stop block 250 to extend from the relief groove 213 and enter the ball groove on the inner wall of the bearing. This increases the contact area with the inner wall of the bearing's curved surface, making the bearing with ball grooves more stable when clamped. The shim 230 creates a gap between the bottom of the bearing and the horizontal surface of the stepped opening 211, preventing the grinding tool from contacting it and protecting the clamping frame 210 and the tool.

[0043] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A positioning fixture for bearing machining, comprising a machining table (100), characterized in that: The processing table (100) is equipped with four sets of clamping frame assemblies (200) on its top. The processing table (100) has a reserved mounting cavity (120). The mounting cavity (120) is equipped with a drive motor (130) for driving the four sets of clamping frame assemblies (200) to converge towards the center. The clamping frame assembly (200) includes a clamping frame (210) slidably mounted on the top of the processing table (100). The top of the clamping frame (210) has multiple sets of stepped openings (211). Each set of stepped openings (211) has a raised piece (230) fixed to its horizontal surface near the inner corner. A transmission groove (212) extending to the outside of the clamping frame (210) is pre-reserved inside the clamping frame (210). A drive mechanism extending to the outside of the transmission groove (212) is laterally rotatably mounted within the transmission groove (212). The drive screw (240) has multiple sets of traction arms (270) threaded onto its outer wall. Each set of traction arms (270) has a stop block (250) fixed on its side and near the top. Each set of stepped openings (211) has a relief groove (213) reserved on its vertical surface to communicate with the transmission groove (212) and to allow the anti-slip groove (260) to extend. Multiple sets of anti-slip grooves (260) are equally spaced on the side surface of the stop block (250) away from the traction arm (270).

2. The positioning fixture for bearing machining according to claim 1, characterized in that: The vertical surface of the stepped opening (211) is provided with anti-slip texture corresponding to the anti-slip groove (260).

3. The positioning fixture for bearing machining according to claim 1, characterized in that: The outer wall of the clamping frame (210) is provided with a through hole that communicates with the transmission groove (212), and the inner wall of the through hole is provided with a matching internal thread at the contact position with the outer wall of the drive screw (240).

4. A positioning fixture for bearing machining according to claim 1, characterized in that: Each set of clamping frames (210) has an arc-shaped opening (220) on the side that is close to each other, and the force surface of the stepped opening (211) is arc-shaped.

5. A positioning fixture for bearing machining according to claim 1, characterized in that: The output end of the drive motor (130) is connected to a moving plate (150). A vortex bar (160) is fixed on the top of the moving plate (150). A driven block (170) is slidably provided on the top of the vortex bar (160) extending to the top of the processing table (100) and fixed to the bottom of the clamping frame (210).

6. A positioning fixture for bearing machining according to claim 1, characterized in that: The top of the processing table (100) is provided with a stroke groove (140) for sliding of the driven block (170), and the bottom of the driven block (170) is provided with a vortex groove that matches the vortex bar (160).

7. A positioning fixture for bearing machining according to claim 1, characterized in that: Ear plates (110) are fixed on the left and right outer walls of the processing table (100) near the bottom. Each set of ear plates (110) has a long straight groove on the top for bolts to pass through.

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