Axial force clamp for processing motor flange end cover

Abstract

The application discloses an axial force clamp for machining of a motor flange end cover, which comprises a flange plate, a three-pronged pull plate, a three-pronged bottom plate, a stop plate and a screw rod, the flange plate is fixedly connected with a main shaft of a lathe, a fixed column is arranged on the pull plate of the three-pronged pull plate, a pressing claw is arranged at the top end of the fixed column, the pressing claw and the fixed column are in L shape, the three-pronged bottom plate is arranged between the flange plate and the three-pronged pull plate, the stop plate passes through the fixed column and the pressing claw, is arranged above the three-pronged pull plate, and the screw rod passes through the stop plate, the three-pronged pull plate, the three-pronged bottom plate and the flange plate in sequence. According to different shapes of the end cover, the process is flexibly adjusted, the central screw rod is rotated, the axial force clamping is used instead of the traditional radial force clamping, the deformation of the plane of the thin-wall workpiece caused by the radial force clamping mode is avoided, and the efficiency of workers in loading and unloading workpieces is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of fixture and tooling technology, and in particular to an axial force fixture for machining motor flange end caps. Background Technology

[0002] Motor flange end covers come in various shapes depending on their application requirements. They are generally made of castings and are thin-walled parts, requiring machining of bearing housings, oil seal positions, double-sided stops, flat surfaces, and central through holes. In particular, for some flanges with special properties, high coaxiality between the inner circle and the two end stops, as well as high runout accuracy of the end face, are required to ensure the installation quality of the motor and the performance requirements of the machinery it is used with.

[0003] Therefore, when machining end caps, not only is it necessary to simplify the operation for mass production, but it is also required to prevent deformation. Traditional flange end cap machining and clamping mostly involves using a three-jaw chuck to clamp the workpiece and machine one side, then turning it around, attaching a stop plate, and tightening screws on three adjacent pressure plates to hold the workpiece in place, before machining the other side. This machining method is time-consuming and cumbersome for workers, and the end cap often suffers from wavy deformation of the end cap plane due to excessive clamping force (radial force) from the three jaws. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention provides an axial force clamp for machining motor flange end covers, which avoids wavy deformation of the flange end cover plane, resulting in higher operating efficiency and simpler clamping.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] An axial force fixture for machining motor flange end caps includes: a flange fixedly connected to the spindle of a machining lathe; a three-pronged pull plate, comprising a central member and three pull plates respectively connected to the central member, a fixing post on each pull plate, a pressure claw at the top of each fixing post, the pressure claw and the fixing post forming an L-shape; a three-pronged base plate disposed between the flange and the three-pronged pull plate; a stop plate passing through the fixing post and the pressure claw, and disposed above the three-pronged pull plate; and a screw, wherein the flange, the three-pronged pull plate, the three-pronged base plate, and the stop plate all have screw holes on the same axis, and the screw passes sequentially through the stop plate, the three-pronged pull plate, the three-pronged base plate, and the flange.

[0007] Furthermore, it includes an end cap, the outer edge of which is provided with an end cap ear, and the pressure claw abuts against the end cap ear.

[0008] Furthermore, the pressure claw and the fixing post are fixed by pressure claw screws, and the pressure claw is rotatable about the pressure claw screws.

[0009] Furthermore, the three pull plates are evenly arranged on the outer periphery of the central member, with adjacent pull plates forming a 120° angle.

[0010] Furthermore, the three-pronged chassis is provided with three-pronged grooves extending outward from the screw hole, and the shape of the three-pronged grooves is adapted to the shape of the three-pronged pull plate.

[0011] Furthermore, the three-pronged pull plate is disposed within the three-pronged groove, and the stop plate is fixed to the end face of the three-pronged chassis.

[0012] Furthermore, the stop plate is fixedly connected to the triangular chassis by stop plate screws, and the flange is fixedly connected to the triangular chassis by flange screws.

[0013] Furthermore, a screw guide sleeve is fitted at the screw hole of the three-pronged chassis, and a self-aligning ball bearing is provided at the screw hole of the three-pronged pull plate.

[0014] Furthermore, the self-aligning ball bearing includes a bearing body, an inner ring, and a pressure cap. The bearing body is disposed in the screw hole, and the pressure cap is fixed to the three-pronged pull plate by pressure cap screws. The pressure cap is pressed against the outer ring of the bearing body, and the inner ring is pressed against the inner ring of the bearing body.

[0015] Furthermore, the flange is fixed to the spindle of the machining lathe by bolts.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) The process can be flexibly adjusted according to the different shapes of the end caps. The central screw 5 is rotated to use axial force instead of traditional radial force, which avoids the deformation of the thin-walled workpiece due to the radial force clamping method and greatly improves the efficiency of workers loading and unloading workpieces.

[0018] (2) By utilizing the characteristic that the axis of the self-aligning ball bearing can swing within 3°, the three pressure claws can automatically press against the three end cap ears, eliminating the cumbersome operation of the traditional three-piece pressure plate. By adopting the swing characteristic of the axis of the self-aligning ball bearing, the three-point automatic contact and pressing of the workpiece is achieved, which greatly facilitates the operation of workers. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention;

[0020] Figure 2 This is a partial top view of the present invention;

[0021] Figure 3 This is a top view of the three-pronged pull plate in this invention;

[0022] Figure 4 yes Figure 3 Cross-sectional view along the AA direction;

[0023] Figure 5 This is a cross-sectional view of the fixing column and the pressure claw in this invention;

[0024] Figure 6 This is a top view of the stop plate of the present invention;

[0025] Figure 7 yes Figure 6 Cross-sectional view along the BB direction;

[0026] Figure 8 This is a top view of the trident chassis in this invention;

[0027] Figure 9 yes Figure 8 Cross-sectional view along the CC direction;

[0028] In the picture:

[0029] 1. Flange; 101. Bolt; 102. Flange screw; 2. Tripod pull plate; 201. Center piece; 202. Pull plate; 203. Fixing post; 204. Pressure claw; 205. Pressure claw screw; 3. Tripod base; 301. Tripod groove; 4. Stop plate; 401. Stop plate screw; 402. Waist hole; 5. Screw; 501. Screw cap; 502. Set screw; 6. Spindle; 7. Screw hole; 8. Bearing body; 9. Inner ring; 10. Pressure cap; 1001. Pressure cap screw; 11. End cap; 1101. End cap lug; 12. Screw guide sleeve; 1201. Guide sleeve screw; 13. Pressure ring; 14. Dustproof ring. Detailed Implementation

[0030] To make the technical problem solved by the invention, the technical solution, and the beneficial effects clearer, the invention will be further described below with reference to the accompanying drawings and embodiments. The invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0031] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0032] like Figure 1-9As shown, an axial force fixture for machining motor flange end caps includes a flange 1, a three-pronged pull plate 2, a three-pronged base plate 3, a stop plate 4, and a screw 5. The flange 1 is fixedly connected to the spindle 6 of a machining lathe; the three-pronged pull plate 2 includes a central component 201 and three pull plates 202 respectively connected to the central component 201. The pull plates 202 are provided with fixing posts 203, and the top of the fixing posts 203 is provided with a pressure claw 204. The pressure claw 204 and the fixing posts 203 are L-shaped; the three-pronged base plate 3 is located between the flange 1 and the three-pronged pull plate 2; the stop plate 4 passes through the fixing posts 203 and the pressure claw 204 and is located above the three-pronged pull plate 2; the flange 1, the three-pronged pull plate 2, the three-pronged base plate 3, and the stop plate 4 are all provided with screw holes 7 on the same axis, and the screw 5 passes through the stop plate 4, the three-pronged pull plate 2, the three-pronged base plate 3, and the flange 1 in sequence.

[0033] It should be noted that, as Figure 1 As shown, the same axis of flange 1, three-fork pull plate 2, three-fork base plate 3 and stop plate 4 should coincide with the axis of spindle 6 of machining lathe. The screw hole 7 is set at the center of flange 1, three-fork pull plate 2, three-fork base plate 3 and stop plate 4. After the screw 5 passes through stop plate 4, three-fork pull plate 2, three-fork base plate 3 and flange 1 in sequence, the screw cap 501 should remain at stop plate 4.

[0034] In this embodiment, the flange 1 is fixedly connected to the spindle 6 of the machining lathe. Specifically, the flange 1 is connected and fixed to the spindle 6 of the machining lathe by double-ended bolts 101. The tapered hole and end face of the flange 1 are positioned on the outer tapered end face of the spindle 6 of the machining lathe. The stop and end face on the other side of the flange 1 are machined on the machining lathe. There are three bolt 101 through holes on the outer edge of the flange 1 to ensure runout accuracy.

[0035] In this embodiment, the three-fork chassis 3 is located between the flange 1 and the three-fork pull plate 2. The three-fork chassis 3 and the flange 1 are fixedly connected by flange screws 102. Specifically, the inner stop and end face of the three-fork chassis 3 are positioned at the stop and end face of the flange 1. Three flange screws 102 pass through the flange 1 and are tightened inside the three-fork chassis 3. The inner stop and end face of the other side of the three-fork chassis 3 are machined on a lathe to ensure runout accuracy.

[0036] like Figure 8-9 As shown, the three-pronged chassis 3 extends along the screw hole 7 towards the outer edge of the three-pronged chassis 3 and is evenly provided with three-pronged grooves 301. The shape of the three-pronged grooves 301 is adapted to the shape of the three-pronged pull plate 2. Specifically, the three-pronged pull plate 2 is set in the three-pronged grooves 301, and the stop plate 4 is fixed on the end face of the three-pronged chassis 3.

[0037] like Figure 3-4As shown, in this embodiment, the three pull plates 202 of the three-pronged pull plate 2 are evenly arranged on the outer periphery of the central member 201, and are evenly radially distributed along the outer periphery of the central member 201, with adjacent pull plates 202 at a 120° angle. A self-aligning ball bearing is provided at the screw hole 7 in the center of the three-pronged pull plate 2. Specifically, the self-aligning ball bearing includes a bearing body 8, an inner ring 9, and a pressure cap 10. The bearing body 8 is located in the screw hole 7, and the pressure cap 10 is fixed to the three-pronged pull plate 2 by pressure cap screws 1001. Subsequently, the pressure cap 10 is pressed against the outer ring of the bearing body 8, and the inner ring 9 is pressed against the inner ring of the bearing body 8.

[0038] like Figure 1 and Figure 5 As shown, in this embodiment, the pressure claw 204 and the fixing post 203 are L-shaped. One end of the pressure claw 204 is a hollow cylinder with an inner countersunk hole in the hollow position. The other end of the pressure claw 204 is a cuboid, perpendicular to the fixing post 203, thus forming a hook-shaped pressure claw 204. The pressure claw 204 and the fixing post 203 are fixed by a pressure claw screw 205. The pressure claw screw 205 passes through the inner countersunk hole at one end of the pressure claw 204. While ensuring that the pressure claw 204 and the fixing post 203 form a 90° angle, the pressure claw 204 can rotate around the pressure claw screw 205 as its axis. Specifically, the height of the pressure claw 204 is set according to the actual distance between the end cap lug 1101 and the three-pronged pull plate 2 of different models.

[0039] In this embodiment, a screw guide sleeve 12 is fitted at the screw hole 7 in the center of the tri-fork chassis 3. Specifically, it is fixed to the screw hole 7 in the center of the tri-fork chassis 3 by a guide sleeve screw 1201. A pressure ring 13 and a dustproof ring 14 are provided at the contact point between the stop plate 4 and the screw cap 501. Thus, the screw 5 passes through the pressure ring 13, the dustproof ring 14 and the inner ring 9. The flat surface of the screw cap 501 is pressed against the pressure ring 13 and presses against the inner ring of the bearing body 8. At this time, the set screw 502 of the inner ring of the screw 5 is drilled through the inner ring 9 and tightens the inner ring 9 onto the screw 5. Then, the screw 5 is further screwed in, and the screw 5 is then screwed into the screw guide sleeve 12. The tri-fork pull plate 2 moves into the three grooves of the tri-fork chassis 3. The inner ring 9 is fixed to the screw 5. Specifically, the contact section between the outer ring of the inner ring 9 and the screw guide sleeve 12 is clearance fit and slides and rotates. This contact section plays the role of supporting the three-pronged pull plate 2.

[0040] In this embodiment, the stop plate 4 is fixedly connected to the tricycle chassis 3 by stop plate screws 401. Specifically, three stop plate screws 401 pass through the stop plate 4 and are tightened inside the tricycle chassis 3. The stop and end face of the stop plate 4 are positioned with the inner stop and end face of the tricycle chassis 3. The other side of the stop plate 4 is machined on a lathe to fit the inner stop and end face of various models of end caps 11, ensuring runout accuracy. The screw hole 7 in the center of the stop plate 4 and the screw hole 7 in the center of the tricycle chassis 3 have the same size. In addition, such as Figure 6-7As shown, the stop plate 4 has a waist-shaped hole 402 at the corresponding position of the center line of the three pull plates 202 of the three-pronged pull plate 2. The waist-shaped hole 402 is used to pass through the pressure claw 204 and the fixing post 203.

[0041] In addition, this embodiment also includes an end cap 11, with an end cap ear 1101 on the outer edge of the end cap 11, a pressure claw 204 abutting against the end cap ear 1101, and an opening in the center of the end cap 11, through which a hexagonal spoon on the rotating screw 5 passes.

[0042] Working principle:

[0043] The three-fork pull plate 2 is placed in the three-fork groove 301 of the three-fork chassis 3. The pressure claw 204 and the fixing post 203 pass through the waist-shaped hole 402 on the stop plate 4. At this time, the three-fork pull plate 2 is set between the three-fork chassis 3 and the stop plate 4. The axial movement stroke of the three-fork pull plate 2 is preset to 10mm. One end face of the stop plate 4 is aligned with one end face of the three-fork chassis 3. The stop plate 4 is fixedly connected to the three-fork chassis 3 by the stop plate screw 401 to form a fixture as a whole. The flange 1 is connected and fixed to the spindle 6 of the machining lathe. The fixture as a whole is connected to the lathe flange 1 by the flange screw 102. The angle and direction of the pressure claw 204 are adjusted by the pressure claw screw 205 so that it is aligned with the end cover lug 1101.

[0044] When installing a workpiece, the stop of the end cap 11 corresponds to the inner stop of the stop plate 4, the end cap lug 1101 is under the pressure claw 204, and the screw cap 501 is an internal hexagon. The screw 5 can be moved inwards or outwards by rotating the screw with a T-shaped internal hexagonal key, thereby driving the three-pronged pull plate 2 and the pressure claw 204 to clamp or loosen the workpiece. The central screw 5 of the fixture drives the pressure claw 204 to clamp or loosen the workpiece, making operation simple.

[0045] Therefore, this invention flexibly adjusts the process according to different shapes of the end cap 11, using axial force clamping instead of traditional radial force clamping, thus avoiding deformation of the plane of thin-walled workpieces caused by radial force clamping. The use of a central screw 5 for rotation greatly improves the efficiency of workers loading and unloading workpieces.

[0046] It should be noted that this embodiment utilizes the characteristic of the self-aligning ball bearing axis having an oscillation within 3°, enabling the three pressure claws 204 to automatically adhere to the three end cap ears 1101, eliminating the cumbersome operation of the traditional three-piece pressure plate clamping. By adopting the oscillation characteristic of the self-aligning ball bearing axis, three-point automatic contact clamping of the workpiece is achieved, greatly facilitating the operation of workers.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

Claims

1. An axial force clamp for machining motor flange end caps, characterized in that, include: A flange, which is fixedly connected to the spindle of a machining lathe; The three-pronged pull plate includes a central component and three pull plates respectively connected to the central component. The pull plates are provided with fixed posts, and the top of the fixed posts is provided with pressure claws. The pressure claws and the fixed posts are L-shaped. A three-pronged chassis, wherein the three-pronged chassis is disposed between the flange and the three-pronged pull plate; A stop plate, which passes through the fixing post and the pressure claw, and is positioned above the three-pronged pull plate; The screw, the flange, the three-pronged pull plate, the three-pronged base plate and the stop plate are all provided with screw holes on the same axis, and the screw passes through the stop plate, the three-pronged pull plate, the three-pronged base plate and the flange in sequence.

2. The axial force fixture for machining a motor flange end cover according to claim 1, characterized in that, Includes an end cap, the outer edge of which is provided with an end cap lug, and the pressure claw abuts against the end cap lug.

3. The axial force fixture for machining a motor flange end cover according to claim 1, characterized in that, The pressure claw and the fixing post are fixed by pressure claw screws, and the pressure claw can rotate about the pressure claw screw as the axis.

4. The axial force fixture for machining a motor flange end cover according to claim 1, characterized in that, The three pull plates are evenly arranged on the outer periphery of the central member, with adjacent pull plates at a 120° angle.

5. The axial force fixture for machining a motor flange end cover according to claim 1, characterized in that, The three-pronged chassis has three-pronged grooves evenly extending outward from the screw hole, and the shape of the three-pronged grooves is adapted to the shape of the three-pronged pull plate.

6. An axial force fixture for machining a motor flange end cover according to claim 5, characterized in that, The three-pronged pull plate is disposed in the three-pronged groove, and the stop plate is fixed on the end face of the three-pronged chassis.

7. An axial force fixture for machining a motor flange end cover according to claim 6, characterized in that, The stop plate is fixedly connected to the triangular chassis by stop plate screws, and the flange is fixedly connected to the triangular chassis by flange screws.

8. An axial force clamp for machining a motor flange end cover according to claim 1, characterized in that, The screw hole of the three-pronged chassis is fitted with a screw guide sleeve, and the screw hole of the three-pronged pull plate is provided with a self-aligning ball bearing.

9. An axial force clamp for machining a motor flange end cover according to claim 8, characterized in that, The self-aligning ball bearing includes a bearing body, an inner ring, and a pressure cap. The bearing body is disposed in the screw hole, and the pressure cap is fixed to the three-pronged pull plate by pressure cap screws. The pressure cap is pressed against the outer ring of the bearing body, and the inner ring is pressed against the inner ring of the bearing body.

10. An axial force fixture for machining a motor flange end cover according to claim 1, characterized in that, The flange is fixed to the spindle of the machining lathe by bolts.

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