Steering wheel spline machining device

Abstract

The utility model discloses a steering wheel spline machining device which comprises a support, a positioning mechanism fixedly arranged on the support and a broach mechanism assembled on the support and used for machining splines on a steering wheel framework positioned on the positioning mechanism. The broach mechanism comprises a force application unit, a linear driving assembly fixedly connected with the force application unit and a broach movably assembled on the force application unit through a broach fixing tool. The steering wheel framework to be machined is positioned through the positioning mechanism, the broach is positioned through the broach fixing tool, the direction of the broach is always kept consistent with that of the steering wheel framework to be machined, and it is guaranteed that spline positioning teeth cut by the broach on the steering wheel framework are located at the designated position. The positioning device solves the positioning problem of the steering wheel framework and the broach during spline machining, and is suitable for being used when positioning teeth are added in the 12 o'clock direction of the steering wheel framework in the spline machining process.

Description

Technical Field

[0001] The utility model belongs to the technical field of steering wheel production, and relates to the processing of splines during steering wheel production, in particular to a steering wheel spline processing device. Background Art

[0002] The steering wheel is connected to the steering shaft through a spline. Its function is to convert the force applied by the driver to the edge of the steering wheel into torque and transmit it to the steering shaft.

[0003] Previously, full-tooth splines were usually processed on the steering wheel frame shaft hole. However, since full-tooth splines have no directional anti-misalignment, they can be assembled at any angle during installation. Therefore, the steering wheel installation is often offset, and the staff needs to correct it later.

[0004] At present, when designing the steering wheel skeleton structure, positioning teeth are gradually added at the 12 o'clock direction of the shaft hole to avoid installation deviation.

[0005] Since there was no direction requirement when processing full-tooth splines before, there was no need to accurately position the steering wheel frame during the production process. However, after adding the positioning teeth, the part of the broach used to process the positioning teeth needs to correspond to the 12 o'clock direction of the steering wheel frame shaft hole, and then the broach and steering wheel frame need to be accurately positioned. Therefore, the existing spline processing device cannot meet the processing requirements of adding positioning teeth at the 12 o'clock direction during spline processing. Utility Model Content

[0006] The utility model provides a steering wheel spline processing device, which can add positioning teeth at the 12 o'clock direction when processing splines on a steering wheel frame.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A steering wheel spline processing device comprises a bracket, a positioning mechanism fixed on the bracket and a broaching mechanism assembled on the bracket and used for processing splines and positioning teeth on a steering wheel skeleton positioned on the positioning mechanism.

[0009] As a limitation of the present invention, the positioning mechanism includes a plurality of positioning posts fixedly mounted on the bracket, and the distribution positions of the plurality of positioning posts correspond to the positions of the positioning holes on the steering wheel frame.

[0010] As a further limitation of the present invention, a plurality of positioning columns are fixed on the bracket via a mounting plate, and a third through hole corresponding to the position of the shaft hole on the steering wheel frame is formed on the mounting plate.

[0011] As a further limitation of the present invention, the plurality of positioning posts include cylindrical positioning posts arranged corresponding to the circular positioning holes on the steering wheel frame and rectangular positioning posts arranged corresponding to the rectangular positioning holes on the steering wheel frame.

[0012] As a further limitation of the present invention, the mounting plate is welded and fixed on the bracket.

[0013] As another limitation of the present invention, the bracket includes a first support frame and a second support frame arranged opposite to each other, and guide columns at both ends respectively fixed to the first support frame and the second support frame; a first through hole for the broaching mechanism to pass through is opened on the first support frame.

[0014] As a further limitation of the present utility model, the broaching mechanism includes a force applying unit mounted on a guide column, a linear drive assembly fixed on a second support frame and having a power output end fixedly connected to the force applying unit, and a broach movably assembled on the force applying unit through a broach fixing tooling.

[0015] As a further limitation of the present invention, the force applying unit includes a front plate and a rear plate, which are fixedly connected by a connecting plate; a second through hole is formed on the front plate and its position corresponds to the first through hole.

[0016] As a further limitation of the present invention, the broach includes an integrally formed fixing portion and a blade body, the fixing portion is square and a stopper is fixedly disposed at the rear end.

[0017] As a further limitation of the present invention, the broach fixing tool comprises a positioning block and a handle fixed on the positioning block for mounting the broach fixing tool on the connecting plate, and a groove having the same width as the broach fixing portion is formed at the bottom of the positioning block.

[0018] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0019] (1) The utility model designs a steering wheel spline processing device that can position the steering wheel frame to be processed and the direction of the broaching tool, thereby achieving the purpose of adding positioning teeth at the 12 o'clock direction during spline processing; the steering wheel frame to be processed is positioned by a positioning mechanism, and the broaching tool is positioned by a broaching tool fixing device, so that the direction of the broaching tool and the steering wheel frame to be processed are always consistent, ensuring that the spline positioning teeth cut by the broaching tool on the steering wheel frame are located at the specified position.

[0020] (2) The mounting plate of the positioning mechanism in the utility model is temporarily welded to the first support frame, and different positioning mechanisms can be replaced according to different models of steering wheel frames, which has good applicability.

[0021] (3) The bracket of the utility model includes a guide column. Since the force-applying unit is mounted on the guide column and moves along the guide column, the force-applying unit drives the broach to move more smoothly. In addition, the purpose of ensuring that the movement trajectory of the broach is always consistent is achieved, thereby ensuring the quality of the spline processing.

[0022] In summary, the utility model solves the problem of positioning the steering wheel frame and the broach when processing splines, and is suitable for adding positioning teeth at the 12 o'clock direction of the steering wheel frame during the spline processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the broach fixing tool in the embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the assembly relationship between the broach and the broach fixing tool in the embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the positioning mechanism in the embodiment of the utility model;

[0028] Figure 5 This is a structural schematic diagram of a force-applying unit in an embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the bracket in the embodiment of the utility model;

[0030] Figure 7 This is a schematic diagram of the use state of an embodiment of the utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the steering wheel skeleton in the embodiment of the utility model;

[0032] In the figure: 1. first support frame; 2. second support frame; 3. guide column; 4. force application unit; 5. connecting column; 6. linear drive assembly; 7. broach fixing fixture; 8. broach; 9. positioning mechanism;

[0033] 11. a first through hole;

[0034] 41. front plate; 42. rear plate; 43. connecting plate; 44. second through hole; 45. sleeve hole;

[0035] 71. Handle; 72. Positioning block;

[0036] 81. fixing part; 82. stopper; 83. knife body;

[0037] 91. Cylindrical positioning column; 92. Third through hole; 93. Rectangular positioning column. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0039] This embodiment discloses a steering wheel spline processing device, including a bracket, a broach mechanism and a positioning mechanism 9.

[0040] Before describing this embodiment, it is necessary to combine Figure 8 The various parts of the steering wheel skeleton defined in this embodiment are described in advance. Figure 8 In the figure, "A" is a circular positioning hole, "B" is a rectangular positioning hole, and "C" is an axis hole.

[0041] like Figure 1 As shown, the bracket includes a first support frame 1 and a second support frame 2 arranged opposite to each other, and a guide column 3 fixed at both ends of the first support frame 1 and the second support frame 2, and two guide columns 3 are provided. Figure 6 As shown, a first through hole 11 for the broaching mechanism to pass through is provided at the center of the first support frame 1 .

[0042] The broaching mechanism includes a force unit 4 sleeved on the guide column 3, a linear drive assembly 6 fixedly mounted on the second support frame 2, a connecting rod 5 for fixedly connecting the force unit 4 and the power output end of the linear drive assembly 6, and a broach 8 movably mounted on the force unit 4 through a broach fixing fixture 7. Figure 5 As shown, the force-applying unit 4 includes a front plate 41 close to the first support frame 1 and a rear plate 42 close to the second support frame 2. The front plate 41 and the rear plate 42 are fixedly connected by two connecting plates 43. Both sides of the front plate 41 and the rear plate 42 are fixedly provided with sleeve holes 45 for sleeve-mounting the force-applying unit 4 on the guide column 3. A second through hole 44 corresponding to the position of the first through hole 11 is opened at the center of the front plate 41. The second through hole 44 is concentric with the first through hole 11 and is located on the same horizontal line. The space enclosed by the front plate 41, the rear plate 42 and the two connecting plates 43 constitutes an operating space for placing the broach fixing tool 7; as shown Figure 3 As shown, the broach 8 includes an integrally formed fixing portion 81 and a blade body 83 . The fixing portion 81 is square and a stopper 82 is fixedly disposed at the rear end. The cross-sectional area of ​​the stopper 82 is larger than that of the fixing portion 81 .

[0043] It is necessary to add here that Figure 2As shown, the broach fixing tool 7 includes a positioning block 72 and a handle 71 fixed on the positioning block 72. A square groove with the same width as the fixing portion 81 of the broach 8 used in conjunction with it is provided at the bottom of the positioning block 72. The handle 71 is composed of two vertically arranged metal tubes. The length of the transversely arranged metal tube is greater than the width between the two connecting plates 43 connecting the front plate 41 and the rear plate 42, so that the handle 71 can be mounted on the two connecting plates 43. The length of the vertically arranged metal tube needs to be able to enable the square groove on the positioning block 72 to be stuck on the fixing portion 81 of the broach 8. In actual production, the broach 8 is fixed with one end of the stopper 82 toward the first support frame 1, and the broach 8 is rotated so that the blade for cutting the positioning teeth on the blade body 83 faces the specified direction, and then the broach 8 is horizontally pushed through the first through hole 11 and the second through hole 44 until the fixing portion 81 of the broach 8 reaches the operating space of the force-applying unit 4 for placing the broach fixing fixture 7, and then the broach fixing fixture 7 is placed so that the square groove on the broach fixing fixture 7 is stuck on the fixing portion 81 of the broach 8. Since the fixing portion 81 of the broach 8 is set to be square, when the fixing portion 81 of the broach 8 is stuck in the square groove of the broach fixing fixture 7, the broach 8 cannot rotate, and the fixation and positioning of the broach 8 can be completed.

[0044] The positioning mechanism 9 includes a plurality of positioning columns fixedly mounted on the first support frame 1 by welding of a mounting plate, such as Figure 4 As shown, a third through hole 92 is provided at the center of the positioning mechanism 9, and the third through hole 92 is concentric with the first through hole 11 and the second through hole 44 and is on the same horizontal line; the plurality of positioning posts include a cylindrical positioning post 91 corresponding to "A" on the steering wheel skeleton and a rectangular positioning post 92 corresponding to "B" on the steering wheel, and the position of the third through hole 92 corresponds to the position of "C" on the steering wheel skeleton. In this embodiment, the positioning posts include two cylindrical positioning posts 91 and one rectangular positioning post 93. When positioning the steering wheel skeleton, it is only necessary to align the positioning holes on the steering wheel skeleton with the positioning posts of the corresponding shape, and then push the steering wheel skeleton so that the positioning holes on the steering wheel skeleton are sleeved on the positioning posts, and the positioning can be completed.

[0045] It should be added here that the positioning holes on the steering wheel frame in this embodiment refer to the bolt holes or equipment installation grooves and positioning teeth originally used for subsequent assembly on the steering wheel frame.

[0046] When using this embodiment, if Figure 7As shown, first, the steering wheel skeleton is placed on the positioning mechanism, and then the broach 8 is passed through the steering wheel skeleton, the first through hole 11, the second through hole 44 and the third through hole 92 through the axial hole, and fixed with the broach fixing fixture 7; after the steering wheel and the broach 8 are fixed, the linear drive assembly 6 is started, and the power output end of the linear drive assembly 6 drives the force unit 4 to move backward through the connecting rod 5. The direction away from the first support frame 1 is defined as backward here, because the broach fixing fixture 7 is placed between the front plate 41 and the rear plate 42, when the force unit 4 moves backward, the front plate 41 will drive it to move backward when it contacts the broach fixing fixture 7, and since a baffle is provided on the fixing portion 81 of the broach 8, the broach 8 will also move backward under the drive of the broach fixing fixture 7, and in the process of the broach 8 moving backward, the tool body 83 can complete the cutting of the spline groove of the steering wheel skeleton.

[0047] It should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A steering wheel spline processing device, characterized in that: It comprises a bracket, a positioning mechanism fixed on the bracket, and a broaching mechanism assembled on the bracket and used for processing splines and positioning teeth on a steering wheel frame positioned on the positioning mechanism; The positioning mechanism includes a plurality of positioning columns fixedly mounted on the bracket, and the distribution positions of the plurality of positioning columns correspond to the positions of the positioning holes on the steering wheel frame; The broach fixing tool comprises a positioning block and a handle fixed on the positioning block for mounting the broach fixing tool on the connecting plate. A groove having the same width as the broach fixing part is provided at the bottom of the positioning block.

2. A steering wheel spline processing device according to claim 1, characterized in that: A plurality of positioning columns are fixed on the bracket through a mounting plate, and a third through hole corresponding to the position of the shaft hole on the steering wheel frame is opened on the mounting plate.

3. A steering wheel spline processing device according to claim 2, characterized in that: The plurality of positioning posts include cylindrical positioning posts arranged corresponding to the circular positioning holes on the steering wheel frame and rectangular positioning posts arranged corresponding to the rectangular positioning holes on the steering wheel frame.

4. A steering wheel spline processing device according to claim 3, characterized in that: The mounting plate is welded and fixed on the bracket.

5. A steering wheel spline processing device according to any one of claims 1 to 4, characterized in that: The bracket comprises a first support frame and a second support frame which are arranged opposite to each other, and guide columns at both ends of which are respectively fixed on the first support frame and the second support frame; a first through hole for the broaching mechanism to pass through is provided on the first support frame.

6. A steering wheel spline processing device according to claim 5, characterized in that: The broach mechanism comprises a force applying unit sleeved on a guide column, a linear drive assembly fixed on a second support frame and having a power output end fixedly connected to the force applying unit, and a broach movably assembled on the force applying unit through a broach fixing fixture.

7. A steering wheel spline processing device according to claim 6, characterized in that: The force applying unit comprises a front plate and a rear plate, which are fixedly connected via a connecting plate; a second through hole is provided on the front plate, the position of which corresponds to the first through hole.

8. A steering wheel spline processing device according to claim 7, characterized in that: The broach comprises an integrally formed fixing portion and a blade body. The fixing portion is square and a stopper is fixedly arranged at the rear end.

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