A fixing fixture for machining starter stators

Abstract

This utility model relates to a fixing fixture for machining starter stators, belonging to the field of starter stator machining technology. It includes a fixture base and a positioning table, with fixture components mounted on the positioning table. The positioning table includes a frustum mounted on the fixture base. This fixing fixture for machining starter stators has three positioning fixtures evenly distributed circumferentially. Through synchronous transmission via gears and racks, it ensures that the center of the stator base coincides with the rotation center of the frustum. An M-shaped rubber pad accommodates minor deformations on the stator base surface, preventing indentations or damage caused by rigid clamping. A rotary cylinder enables rapid clamping or releasing. A dual-brake motor, in conjunction with a control system, precisely controls the rotation angle of the frustum, reducing manual adjustment time. The fixture components and drive components are installed independently, allowing for adaptation to different stator base specifications by replacing the positioning fixtures, thus offering strong versatility. The motor has a built-in brake function, locking the frustum position during power failure to prevent accidental rotation during machining, improving safety.

Description

Technical Field

[0001] This utility model relates to the field of starter stator machining technology, specifically a fixing fixture for starter stator machining. Background Technology

[0002] The starter stator consists of three parts: the stator core, the stator windings, and the stator base. The main function of the stator is to generate a rotating magnetic field, while the main function of the rotor is to be cut by magnetic lines of force in the rotating magnetic field to generate current. The stator base is located on the outside of the stator and is an indispensable part of the starter. The stator base is precision milled. When machining the stator base in the machining center, it needs to be fixed to prevent it from sliding during the machining process and to ensure the machining accuracy of the stator base.

[0003] Chinese Patent Publication No. CN221088068U discloses a fixture for machining a stator seat. It uses a clamping cylinder in a clamping mechanism to control the movement of a clamping plate toward the stator seat. The stator seat can only be positioned by the cooperation of multiple sets of clamping cylinders and clamping plates. In actual use, the clamping force of multiple sets of cylinders is too large or the directions conflict. For example, if two horizontal cylinders clamp from opposite directions at the same time, it is easy to cause deformation of the stator seat or surface damage. Moreover, it is difficult to synchronize the cylinder movements. It is necessary to optimize the operation by using components such as air circuit diverter valves and synchronization controllers. Therefore, a fixing fixture for machining starter stators is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a fixing fixture for starter stator machining, which has the advantage of stable clamping and solves the problems in actual use, such as excessive clamping force or conflicting directions of multiple sets of cylinders, for example, two horizontal cylinders clamping from opposite directions at the same time, which can easily cause deformation of the stator seat or surface damage. In addition, the cylinder action synchronization is difficult and requires optimization through components such as air circuit diverter valves and synchronization controllers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fixing fixture for machining starter stators, comprising a fixture base and a positioning table, wherein a fixture component is provided on the positioning table and a driving component is provided on the fixture base;

[0006] The positioning platform includes a frustum disposed on a fixture seat. The bottom of the frustum is provided with a support cylinder, and one end of the support cylinder extends through the interior of the frustum and is fixedly connected to the frustum. A support seat is rotatably mounted on the end of the support cylinder, and the support seat is fixedly installed inside the fixture seat.

[0007] The clamping component includes a rotary cylinder fixedly installed inside the truncated cone. A gear is fixedly installed on the output shaft of the rotary cylinder. Three racks that mesh with the gear are slidably installed inside the truncated cone. A connecting bracket with one end penetrating through and extending to the outside of the truncated cone is fixedly installed at one end of each of the three racks. A positioning clamp for clamping the stator seat is fixedly installed at the end of each of the three connecting brackets.

[0008] Furthermore, the driving component includes a dual-brake motor fixedly mounted on the clamp seat, a bevel gear fixedly mounted on the output shaft of the dual-brake motor, and a bevel gear ring that meshes with the outer surface of the bevel gear fixedly mounted on the outer surface of the support cylinder.

[0009] Furthermore, three guide bars are fixedly installed inside the frustum, and each of the racks has a guide groove at its bottom. The outer surface of the guide bar and the inner wall of the guide groove are slidably connected.

[0010] Furthermore, the positioning fixture includes a V-shaped clamping block and an M-shaped rubber pad. The V-shaped clamping block has two mounting slots, and the M-shaped rubber pad is installed inside the two mounting slots. The angle between the two inclined surfaces on the V-shaped clamping block is 120 degrees.

[0011] Furthermore, the fixture base includes a square platform, a rectangular frame, and a cover plate. Four fixed shafts are fixedly installed on the square platform, and one end of each of the four fixed shafts passes through the cover plate. The cover plate is located directly above the rectangular frame. The dual-brake motor is fixedly installed on the rectangular frame, and the rectangular frame is fixedly installed inside the square platform.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] This fixture for machining starter stators features a clamping structure with three circumferentially evenly distributed positioning fixtures. Synchronous transmission via gears and racks ensures the stator center coincides with the rotation center of the truncated cone. M-shaped rubber pads accommodate minor surface deformations of the stator, preventing indentations or damage from rigid clamping. A rotary cylinder enables rapid clamping and releasing. A dual-brake motor, in conjunction with the control system, precisely controls the truncated cone's rotation angle, reducing manual adjustment time and making it suitable for mass production. The fixture and drive components are installed independently, allowing for adaptation to different stator sizes by replacing the positioning fixtures, offering high versatility. The motor has a built-in brake function that locks the truncated cone's position during power failure, preventing accidental rotation during machining and enhancing safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a three-dimensional schematic diagram of the structural clamp base and driving component of this utility model;

[0016] Figure 3 This is a perspective view of the positioning platform and clamping components of this utility model.

[0017] Figure 4 This is an enlarged view of the structural driving component of this utility model;

[0018] Figure 5 This is a schematic diagram of the frustum structure and clamping components of this utility model;

[0019] Figure 6 This is a perspective view of the rack, connecting bracket, and positioning fixture of this utility model.

[0020] In the diagram: 1. Fixture base; 2. Positioning platform; 21. Frustum; 22. Support cylinder; 23. Support base; 3. Fixture component; 31. Rotary cylinder; 32. Gear; 33. Rack; 34. Connecting bracket; 35. Positioning fixture; 4. Drive component; 41. Double brake motor; 42. Bevel gear; 43. Bevel gear ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: Please refer to Figure 1-6 A fixed fixture for machining a starter stator in this embodiment includes a fixture base 1 and a positioning table 2. The positioning table 2 is provided with a fixture component 3, and the fixture base 1 is provided with a driving component 4.

[0023] Example 2: Please refer to Figure 1-6 Based on Embodiment 1, the positioning platform 2 includes a frustum 21 disposed on the fixture base 1. The bottom of the frustum 21 is provided with a support cylinder 22, and one end of the support cylinder 22 passes through the interior of the frustum 21 and is fixedly connected to the frustum 21. The end of the support cylinder 22 is rotatably mounted with a support seat 23, and the support seat 23 is fixedly installed inside the fixture base 1.

[0024] The clamping component 3 includes a rotary cylinder 31 fixedly installed inside the truncated cone 21. A gear 32 is fixedly installed on the output shaft of the rotary cylinder 31. Three racks 33 that mesh with the gear 32 are slidably installed inside the truncated cone 21. A connecting bracket 34 that extends through and out of the truncated cone 21 is fixedly installed at one end of each of the three racks 33. A positioning clamp 35 for clamping the stator seat is fixedly installed at the end of each of the three connecting brackets 34.

[0025] The truncated cone 21 has three guide bars fixedly installed inside, and the bottom of the rack 33 is provided with guide grooves. The outer surface of the guide bar and the inner wall of the guide groove are slidably connected. The guide bar inside the truncated cone 21 cooperates with the guide groove at the bottom of the rack 33 to ensure that the rack 33 slides without deviation and improves the clamping accuracy.

[0026] In addition, the positioning fixture 35 includes a V-shaped clamping block and an M-shaped rubber pad. The V-shaped clamping block has two mounting slots, and the M-shaped rubber pad is installed inside the two mounting slots. The angle between the two inclined surfaces on the V-shaped clamping block is 120 degrees. The 120° angle design of the V-shaped clamping block can be adapted to the outer circle contour of the circular stator seat. The rubber pad increases the friction through elastic deformation to achieve clamping without damage.

[0027] Using the above technical solution, the output shaft of the rotary cylinder 31 drives the gear 32 to rotate. The gear 32 simultaneously meshes with three racks 33. Due to the meshing relationship between the racks 33 and the gear 32, the rotation of the gear 32 will synchronously push the three racks 33 to slide radially. The three racks 33 drive the positioning fixture 35 to move synchronously through the connecting bracket 34. The positioning fixture 35 adopts a V-shaped clamping block and an M-shaped rubber pad structure. The 120-degree angle design of the V-shaped clamping block can be adapted to the outer circle contour of the circular stator seat. The rubber pad increases the friction through elastic deformation to achieve non-damaging clamping.

[0028] Example 3: Please refer to Figure 1-6 Based on Embodiment 2, the driving component 4 includes a double-brake motor 41 fixedly mounted on the clamp seat 1, a bevel gear 42 fixedly mounted on the output shaft of the double-brake motor 41, and a bevel gear ring 43 that meshes with the outer surface of the bevel gear 42 fixedly mounted on the outer surface of the support cylinder 22.

[0029] The fixture base 1 includes a square platform, a rectangular frame, and a cover plate. Four fixed shafts are fixedly installed on the square platform, and one end of each of the four fixed shafts passes through the cover plate. The cover plate is located directly above the rectangular frame. A dual-brake motor 41 is fixedly installed on the rectangular frame, and the rectangular frame is fixedly installed inside the square platform. The square platform, rectangular frame, and cover plate of the fixture base 1 form a rigid support. The four fixed shafts ensure the installation accuracy of the cover plate and the rectangular frame. The dual-brake motor 41 is fixed to the rectangular frame and drives the rotary table 21 to rotate through the transmission components, thereby decoupling the positioning and rotation functions.

[0030] Using the above technical solution, the double-brake motor 41 drives the bevel gear 42 to rotate. The bevel gear 42 meshes with the bevel gear ring 43 outside the support cylinder 22, driving the support cylinder 22 and the truncated cone 21 to rotate around the central axis. The support cylinder 22 is rotatably connected to the fixture seat 1 through the support base 23. When the truncated cone 21 rotates, the machining angle of the stator seat can be adjusted, and multi-directional machining can be achieved in conjunction with the machine tool. The square platform, rectangular frame and cover plate of the fixture seat 1 constitute a rigid support. The four fixed axes ensure the installation accuracy of the cover plate and the rectangular frame. The double-brake motor 41 is fixed to the rectangular frame and drives the truncated cone 21 to rotate through the transmission components, thereby decoupling the positioning and rotation functions.

[0031] The working principle of the above embodiments is as follows:

[0032] In use, the fixed fixture for starting stator machining is operated by rotating the output shaft of the rotary cylinder 31 to drive the gear 32 to rotate. The gear 32 simultaneously meshes with three racks 33. Due to the meshing relationship between the racks 33 and the gear 32, the rotation of the gear 32 will synchronously push the three racks 33 to slide radially. The three racks 33 drive the positioning fixture 35 to move synchronously through the connecting bracket 34. The positioning fixture 35 adopts a V-shaped clamping block and an M-shaped rubber pad structure. The 120-degree angle design of the V-shaped clamping block can be adapted to the outer circle contour of the circular stator seat. The rubber pad increases the friction through elastic deformation to achieve non-damaging clamping.

[0033] The double-brake motor 41 drives the bevel gear 42 to rotate. The bevel gear 42 meshes with the bevel gear ring 43 outside the support cylinder 22, causing the support cylinder 22 and the truncated cone 21 to rotate around the central axis. The support cylinder 22 is rotatably connected to the fixture seat 1 through the support seat 23. When the truncated cone 21 rotates, the machining angle of the stator seat can be adjusted, so as to achieve multi-directional machining in conjunction with the machine tool.

[0034] The square platform, rectangular frame, and cover plate of the fixture base 1 form a rigid support. Four fixed axes ensure the installation accuracy of the cover plate and the rectangular frame. The double-brake motor 41 is fixed to the rectangular frame and drives the round platform 21 to rotate through the transmission components, thereby decoupling the positioning and rotation functions.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixing fixture for machining starter stators, comprising a fixture base (1) and a positioning table (2), characterized in that: The positioning platform (2) is provided with a clamping component (3), and the clamping base (1) is provided with a driving component (4). The positioning platform (2) includes a frustum (21) disposed on the fixture base (1). The bottom of the frustum (21) is provided with a support cylinder (22), and one end of the support cylinder (22) passes through the interior of the frustum (21) and is fixedly connected to the frustum (21). A support seat (23) is rotatably installed at the end of the support cylinder (22), and the support seat (23) is fixedly installed inside the fixture base (1). The clamping component (3) includes a rotary cylinder (31) fixedly installed inside the truncated cone (21). A gear (32) is fixedly installed on the output shaft of the rotary cylinder (31). Three racks (33) that mesh with the gear (32) are slidably installed inside the truncated cone (21). One end of each of the three racks (33) is fixedly installed with a connecting bracket (34) that extends through and out of the truncated cone (21). The ends of the three connecting brackets (34) are fixedly installed with positioning clamps (35) for clamping the stator seat.

2. The fixture according to claim 1, wherein: The drive component (4) includes a double-brake motor (41) fixedly mounted on the clamp seat (1), a bevel gear (42) fixedly mounted on the output shaft of the double-brake motor (41), and a bevel gear ring (43) that meshes with the outer surface of the support cylinder (22) fixedly mounted on the outer surface of the support cylinder (22).

3. The fixture according to claim 1, wherein: Three guide bars are fixedly installed inside the truncated cone (21), and guide grooves are opened at the bottom of the rack (33). The outer surface of the guide bar and the inner wall of the guide groove are slidably connected.

4. The fixture according to claim 1, wherein: The positioning fixture (35) includes a V-shaped clamping block and an M-shaped rubber pad. The V-shaped clamping block has two mounting slots, and the M-shaped rubber pad is installed inside the two mounting slots. The angle between the two inclined surfaces on the V-shaped clamping block is 120 degrees.

5. The fixture according to claim 2, wherein: The fixture base (1) includes a square platform, a rectangular frame and a cover plate. Four fixed shafts are fixedly installed on the square platform. One end of each of the four fixed shafts passes through the cover plate. The cover plate is located directly above the rectangular frame. The double brake motor (41) is fixedly installed on the rectangular frame. The rectangular frame is fixedly installed inside the square platform.

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