Steering driving motor end cover machining clamp

By designing a steering drive motor end cover processing fixture including a base plate, a first fixture and a second fixture, the problems of unstable clamping and insufficient precision during the motor end cover machining process in the prior art are solved, and stable clamping and precise machining of the end cover are achieved.

CN222570004UActive Publication Date: 2025-03-07TAICANG HAIJIA VEHICLE FITTINGS
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Patent Information

Application Number
CN202323527790.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-25
Publication Date
2025-03-07
Estimated Expiration
2033-12-25

AI Technical Summary

Technical Problem

In the prior art, when machining the motor end cover, it is difficult to achieve stable clamping and precise machining, especially during the clamping ear removal process, which is prone to inadequate cutting due to unstable clamping.

Method used

A steering drive motor end cover processing fixture is designed, including a base plate, a first fixture and a second fixture. The first clamp clamps the three clamping ears of the end cover side wall through two sets of first clamping assemblies and a set of second clamping assemblies, and cooperates with the positioning pin and anti-dust rod to ensure the correct position and stable clamping of the end cover. The second clamp uses a three-jaw expansion clamp and a third compression assembly to clamp and press the inner wall and surface of the end cap to ensure the stability of the end cap when cutting the clamping ears.

Benefits of technology

Through the design of this fixture, stable clamping and precise machining of the motor end cover is achieved, which avoids the problem of inadequate cutting caused by unstable clamping, and ensures the correct position and stability of the end cover during the processing process.

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Abstract

The utility model discloses a machining clamp for an end cover of a steering driving motor. The machining clamp comprises a bottom plate, a first clamp body and a second clamp body. The first clamp body and the second clamp body are arranged on the bottom plate. According to the structure, the two clamps are arranged on the floor, the two first clamping assemblies and the second clamping assembly are adopted to conduct three-point clamping on the end cover, the positioning pin and the fool-proof rod are matched, the end cover is prevented from being installed in a misplaced mode, and then the machining precision is guaranteed. When the clamping lug is cut off, the three-jaw expansion clamp is adopted to be matched with top pressing, it can be effectively guaranteed that the end cover is stably clamped by the second clamp, and the situation that cutting is not in place due to unstable clamping when the clamping lug is cut is avoided. Besides, the three supporting parts arranged at equal intervals and the positioning blocks matched with the holes in the end cover in position are arranged on the fixing base, the supporting and positioning effects on the end cover are achieved, and the end cover is further prevented from moving in the cutting process.
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Description

Technical Field

[0001] The utility model relates to the field of motor production, in particular to a processing fixture for a steering drive motor end cover. Background Art

[0002] The electric power steering system (EPS) is a power steering system that directly relies on the motor to provide auxiliary torque. The main structure of the automotive electric power steering motor is assembled from a drive motor and a gearbox, which has a deceleration function; the drive motor provides a high-speed, low-torque speed output, and the gearbox is connected to the drive motor to reduce the high-speed speed output by the drive motor and increase the torque to achieve an ideal transmission effect. The motor end cover is one of the main components of the drive motor. There are high requirements for the surface size, so after the die-casting is completed, machining is required. Therefore, three clamping ears are preset on the side of the end cover, and the clamping ears are clamped and the end cover is machined. Finally, the clamping ears need to be removed; therefore, it is necessary to design a fixture for clamping the end cover. Utility Model Content

[0003] In view of the defects of the above prior art, the main purpose of the utility model is to overcome the shortcomings of the prior art, and discloses a steering drive motor end cover processing fixture, including a base plate and a first fixture and a second fixture arranged on the base plate;

[0004] The first clamp is used to clamp the end cover to machine the surface of the end cover; the first clamp includes two groups of first clamping components and one group of second clamping components, the first clamping components and the second clamping components are distributed in a regular triangle, and the three clamping ears of the side wall of the end cover are clamped by the first clamping components and the second clamping components;

[0005] The second clamp includes a three-jaw expansion clamp and a third clamping assembly. The three-jaw expansion clamp is used to clamp the inner wall of the end cover, and the third clamping assembly is used to provide downward pressure to the end cover so that the end cover is pressed against the three-jaw expansion clamp.

[0006] Further, the first clamping assembly includes a first angle pressing cylinder, a first pressing seat, a positioning pin, an anti-fool rod and a first positioning plate, the first pressing seat is installed on the base plate, the positioning pin and the anti-fool rod are vertically arranged on the first pressing seat, the first positioning plate includes a first positioning part and a first adjusting part which are vertically arranged to each other, a first adjusting groove is arranged on the first adjusting part, the first adjusting groove and the first pressing seat are connected by screws, the anti-fool rod and the first positioning part form a positioning area, and the positioning pin positions a clamping ear of the end plate; the first angle pressing cylinder is arranged on one side of the first pressing seat, and the clamping ear is pressed onto the first pressing seat by the first angle pressing cylinder.

[0007] Furthermore, the second clamping assembly includes a second corner pressing cylinder, a second pressing seat and two second positioning plates, the second pressing seat is arranged on the base plate, the two second positioning plates are installed on the second pressing seat by screws, the two second positioning plates form a positioning area cooperating with the clamping ear, the second corner pressing cylinder is arranged on one side of the second pressing seat, and the clamping ear is pressed onto the second pressing seat by using the second corner pressing cylinder.

[0008] Furthermore, the second positioning plate includes a second positioning portion and a second adjusting portion, the second adjusting portion is provided with a second adjusting groove, and the second adjusting groove and the second pressing seat are connected by screws.

[0009] Furthermore, the three-jaw expansion clamp includes a fixed seat, a driving rod, three clamping blocks and a cylinder, the fixed seat is arranged on the base plate, the driving rod is a frustum structure, the three clamping blocks surround the driving rod circumferentially, and the clamping blocks cooperate with the inclined surfaces of the driving rod, the cylinder is arranged below the fixed seat, the cylinder is connected to the driving rod, and the driving rod is floatingly connected to the clamping block through a connecting ring; when the cylinder controls the driving rod to drive the clamping block to move downward, the clamping block moves radially outward.

[0010] Furthermore, the fixing seat is provided with a support portion and a positioning block, two positioning blocks are arranged at intervals, and the positioning blocks cooperate with the holes on the end cover; three support portions are arranged at equal intervals, and the end cover is supported on the support portions.

[0011] Furthermore, the third clamping assembly includes a third angle pressing cylinder and a pressing head, and the pressing head acts on the surface of the end cover.

[0012] Beneficial effects achieved by the utility model:

[0013] The utility model structure sets two sets of clamps on the floor, adopts two sets of first clamping components and one set of second clamping components to clamp the end cover at three points, and cooperates with positioning pins and anti-fool rods to prevent the end cover from being installed in dislocation, thereby ensuring machining accuracy. When the clamping ear is removed, a three-claw expansion clamp is used, which cooperates with the top to press, which can effectively ensure that the end cover is stably clamped by the second clamp, avoiding inadequate cutting due to unstable clamping when cutting the clamping ear. In addition, three equally spaced support parts and positioning blocks that match the hole position on the end cover are set on the fixed seat, which play a role in supporting and positioning the end cover, and further prevent the end cover from moving during the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a steering drive motor end cover processing fixture of the utility model;

[0015] Figure 2 is a schematic structural diagram of a first clamp;

[0016] Figure 3 is a schematic structural diagram of a second clamp;

[0017] Figure 4 is a cross-sectional view of the second clamp;

[0018] The reference numerals are as follows:

[0019] 1. Bottom plate, 2. First clamp, 3. Second clamp, 21. First clamping assembly, 22. Second clamping assembly, 31. Three-jaw expansion clamp, 32. Third clamping assembly, 211. First corner pressing cylinder, 212. First pressing seat, 213. Positioning pin, 214. Anti-fool rod, 215. First positioning plate, 2151. First positioning part, 2152. First adjusting part, 2153. First adjusting slot, 221. Second corner pressing cylinder, 222. Second clamping seat; 223. Second positioning plate; 2231. Second positioning portion; 2232. Second adjusting portion; 2233. Second adjusting slot; 31. Three-jaw expansion clamp; 32. Third clamping assembly; 311. Fixed seat; 312. Driving rod; 313. Clamping block; 314. Cylinder; 315. Connecting rod; 316. Support portion; 317. Positioning block; 318. Connecting ring; 321. Third corner pressing cylinder; 322. Pressing head. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] A steering drive motor end cover processing fixture, such as Figure 1-Figure 4 As shown, it includes a base plate 1 and a first clamp 2 and a second clamp 3 arranged on the base plate 1;

[0022] The first clamp 2 is used to clamp the end cover to machine the surface of the end cover; the first clamp 2 includes two groups of first clamping components 21 and one group of second clamping components 22, the first clamping components 21 and the second clamping components 22 are distributed in a regular triangle, and the first clamping components 21 and the second clamping components 22 are used to clamp the three clamping ears of the side wall of the end cover;

[0023] The second clamp 3 includes a three-jaw expansion clamp 31 and a third pressing assembly 32. The three-jaw expansion clamp 31 is used to clamp the inner wall of the end cover, and the third pressing assembly 32 is used to provide downward pressure to the end cover so that the end cover is pressed against the three-jaw expansion clamp 31. The end cover is clamped by the second clamp 3 to cut off the three clamping ears on the side of the end cover.

[0024] In one embodiment, if Figure 1-Figure 4 As shown, the first clamping assembly 21 includes a first corner pressing cylinder 211, a first pressing seat 212, a positioning pin 213, an anti-fool rod 214 and a first positioning plate 215. The first pressing seat 212 is installed on the bottom plate 1. Positioning holes are set on the two clamping ears of the end cover. The positioning pin 213 and the anti-fool rod 213 are set on the first pressing seat 212. The end cover is positioned by the positioning pin 213. At the same time, the end cover is placed in a misaligned position in cooperation with the anti-fool rod 214. The positioning pin 213 is a diamond-shaped structure. The first positioning plate 215 is fixed to the first pressing seat 212 by screws to further limit the clamping ears; specifically, the anti-fool rod 214 and the first positioning plate 215 determine the placement position of the clamping ears, and the positioning is performed by the positioning pin 213. Preferably, the first positioning plate 215 includes a first positioning portion 2151 and a first adjusting portion 2152 which are perpendicular to each other. The first adjusting portion 2152 is provided with a first adjusting slot 2153, so that the first positioning plate 215 can be rotated around the screw to adjust the direction, and the position of the first positioning portion 2151 can be horizontally adjusted along the first adjusting slot 2153. The first corner pressing oil cylinder 211 is provided at one side of the first pressing seat 212, and the clamping ear is pressed against the first pressing seat 212 by the first corner pressing oil cylinder 211.

[0025] In one embodiment, if Figure 1-Figure 4 As shown, the second clamping assembly 22 includes a second corner pressing oil cylinder 221, a second pressing seat 222 and two second positioning plates 223. The second pressing seat 222 is arranged on the bottom plate 1. The two second positioning plates 223 are installed on the second pressing seat 222 by screws. The two second positioning plates 223 form a positioning area that cooperates with the clamping ear. The second corner pressing oil cylinder 221 is arranged on one side of the second pressing seat 222. The clamping ear is pressed against the second pressing seat 222 by the second corner pressing oil cylinder 221. Among them, the second positioning plate 223 includes a second positioning portion 2231 and a second adjusting portion 2232. The second adjusting portion is provided with a second adjusting groove 2233. The second adjusting groove 2233 and the second pressing seat 221 are connected by screws. Then, the second positioning portion 2231 is adjusted in the horizontal direction so that the positioning area cooperates with the clamping ear.

[0026] In one embodiment, if Figure 1-Figure 4As shown, the three-jaw expansion clamp 31 includes a fixed seat 311, a driving rod 312, three clamping blocks 313 and a cylinder 314. The fixed seat 311 is set on the bottom plate 1. The driving rod 312 is a truncated cone structure. The three clamping blocks 313 surround the driving rod 312 circumferentially, and the clamping blocks 313 cooperate with the inclined surface of the driving rod 312; when the clamping blocks 313 move downward, they will move outward along the inclined surface at the same time. The cylinder 314 is set below the fixed seat, and the connecting rod 315 is connected to the cylinder 314, wherein three connecting rods 315 are set, and a protrusion is set at the upper end of the connecting rod 315, and a limit zone is formed between adjacent protrusions to limit the installation area of ​​the clamping block 313. A through hole is set on the fixed seat 311 to allow the connecting rod 315 to pass through. The connecting rod 315 passes through the through hole so that its upper end protrudes from the through hole. The connecting rod 315 is connected to the clamp block 313 in a floating manner through the connecting ring 318, so that the clamp block can move horizontally in the installation area. When the oil cylinder 314 drives the connecting rod 315 to drive the clamp block 313 to move downward, the clamp block 313 cooperates with the inclined surface of the driving rod 312, so that the clamp block 313 moves outward; that is, the three clamp blocks 313 move radially outward to press against the inner wall of the end cover, thereby clamping the end cover.

[0027] In one embodiment, if Figure 1-Figure 4 As shown, the fixing seat 311 is provided with a support portion 316 and a positioning block 317 , two positioning blocks 317 are arranged at intervals, and the positioning blocks 317 match with the holes on the end cover; three support portions 316 are arranged at equal intervals, and the end cover is supported on the support portions 316 .

[0028] In one embodiment, if Figure 1-Figure 4 As shown, the third pressing assembly 32 includes a third angle pressing oil cylinder 321 and a pressing head 322, and the pressing head 322 acts on the surface of the end cover to provide downward pressure for the end cover.

[0029] When the utility model is used, Figure 1-Figure 4 As shown, the end cap is first mounted on the first fixture 1, and the three clamping ears of the end cap are clamped by two sets of first clamping components 21 and one set of second clamping components 22, and the end cap is machined to avoid processing. Then the end cap is mounted on the second fixture 2, and the three-claw expansion fixture and the top fixture are used to make the end cap stably clamped, and then the three clamping ears are cut off by machining.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should be included in the scope of protection of the claims of the present invention.

Claims

1. A steering drive motor end cover processing fixture, characterized in that: It includes a bottom plate and a first clamp and a second clamp arranged on the bottom plate; The first clamp is used to clamp the end cover to machine the surface of the end cover; the first clamp includes two groups of first clamping components and one group of second clamping components, the first clamping components and the second clamping components are distributed in a regular triangle, and the three clamping ears of the side wall of the end cover are clamped by the first clamping components and the second clamping components; The second clamp includes a three-jaw expansion clamp and a third clamping assembly. The three-jaw expansion clamp is used to clamp the inner wall of the end cover, and the third clamping assembly is used to provide downward pressure to the end cover so that the end cover is pressed against the three-jaw expansion clamp.

2. A steering drive motor end cover processing fixture according to claim 1, characterized in that: The first clamping assembly includes a first angle pressing cylinder, a first pressing seat, a positioning pin, an anti-fool rod and a first positioning plate. The first pressing seat is installed on the base plate. The positioning pin and the anti-fool rod are vertically arranged on the first pressing seat. The first positioning plate includes a first positioning part and a first adjusting part which are vertically arranged to each other. The first adjusting part is provided with a first adjusting groove. The first adjusting groove and the first pressing seat are connected by screws. The anti-fool rod and the first positioning part form a positioning area. The positioning pin positions a clamping ear of the end plate. The first angle pressing cylinder is arranged on one side of the first pressing seat. The clamping ear is pressed onto the first pressing seat by the first angle pressing cylinder.

3. A steering drive motor end cover processing fixture according to claim 1, characterized in that: The second clamping assembly includes a second corner pressing cylinder, a second pressing seat and two second positioning plates. The second pressing seat is arranged on the base plate. The two second positioning plates are installed on the second pressing seat by screws. The two second positioning plates form a positioning area that cooperates with the clamping ear. The second corner pressing cylinder is arranged on one side of the second pressing seat. The clamping ear is pressed onto the second pressing seat by using the second corner pressing cylinder.

4. A steering drive motor end cover processing fixture according to claim 3, characterized in that: The second positioning plate includes a second positioning portion and a second adjusting portion. The second adjusting portion is provided with a second adjusting groove. The second adjusting groove and the second pressing seat are connected by screws.

5. The steering drive motor end cover processing fixture according to claim 1, characterized in that: The three-jaw expansion clamp includes a fixed seat, a driving rod, three clamping blocks and a cylinder. The fixed seat is arranged on the base plate. The driving rod is a truncated cone structure. The three clamping blocks surround the driving rod circumferentially, and the clamping blocks cooperate with the inclined surfaces of the driving rod. The cylinder is arranged below the fixed seat. The cylinder is connected to the driving rod, and the driving rod is floatingly connected to the clamping block through a connecting ring. When the cylinder controls the driving rod to drive the clamping block to move downward, the clamping block moves radially outward.

6. A steering drive motor end cover processing fixture according to claim 5, characterized in that: The fixing seat is provided with a supporting part and a positioning block, wherein two positioning blocks are arranged at intervals, and the positioning blocks match with the holes on the end cover; and three supporting parts are arranged at equal intervals, and the end cover is supported on the supporting parts.

7. A steering drive motor end cover processing fixture according to claim 5, characterized in that: The third pressing assembly includes a third angle pressing oil cylinder and a pressing head, and the pressing head acts on the surface of the end cover.