Automatic tensioning wheel support positioning tool

Abstract

The utility model discloses an automatic tensioning wheel support positioning tool which comprises a first-order plane positioning workpiece and a second-order one-face two-pin positioning workpiece. The first-order plane positioning workpiece comprises a first-order bottom plate, a first-order transverse positioning clamp and a first-order longitudinal positioning clamp; the first-order transverse positioning clamp and the first-order longitudinal positioning clamp are arranged on the upper end face of the first-order bottom plate in a protruding mode respectively, and the first-order transverse positioning clamp and the first-order longitudinal positioning clamp are perpendicular to each other. The second-order one-face two-pin positioning workpiece comprises a second-order bottom plate, a second-order cylindrical pin and a second-order rhombic pin; the second-order cylindrical pin and the second-order rhombic pin are arranged on the upper end face of the second-order bottom plate in a protruding mode, and the connecting line of the second-order cylindrical pin and the second-order rhombic pin is perpendicular to the long axis of the rhombic pin; when the automatic tensioning wheel support is machined, the automatic tensioning wheel support can be rapidly and accurately positioned, and the accuracy of the automatic tensioning wheel support is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile part processing devices, in particular to a positioning tool for an automatic tensioner bracket. Background Art

[0002] Refer to Figures 1 - 2 As shown, the structure of the automatic tensioner bracket for automobiles is as follows: it is an overall triangular flat block, and circular convex columns 1' are respectively extended and provided at the upper and lower ends of each corner position of the triangular flat block. Each circular convex column 1' is provided with a through hole 11' from top to bottom. Convex ribs 2' are provided on the plane between two circular convex columns 1' on the front of the automatic tensioner bracket. A large circular convex disk 3' is provided in the middle of the front of the automatic tensioner bracket, and a central hole 31' is provided at the center of the large circular convex disk 3'. A small convex ring 4' protrudes circumferentially around the central hole 31' on the back of the automatic tensioner bracket. A counterbore through hole 32' is provided at the outer edge of the outer ring corresponding to the small convex ring 4' on the back of the automatic tensioner bracket on the front of the automatic tensioner bracket.

[0003] When machining the plane of the automatic tensioner bracket, the plane is usually directly pressed by a pressing plate, and then the plane and holes of the automatic tensioner bracket are machined. This machining method has disadvantages and deficiencies: the clamping only ensures whether it is firmly pressed, without the accuracy of position and precision. When the clamping part needs to be machined, once it comes into contact with the clamping, it is easy to cause plane displacement, affecting the accuracy and precision of machining. Content of the Utility Model

[0004] To solve the above problems, the utility model provides a positioning tool for an automatic tensioner bracket, which respectively uses plane positioning and one-plane-two-pin positioning methods to machine the bracket, solving the accuracy and quality of machining the automatic tensioner bracket during the trial production process; enabling rapid and accurate positioning when machining the automatic tensioner bracket, and ensuring the precision of the automatic tensioner bracket.

[0005] The utility model provides a positioning tool for an automatic tensioner bracket, including a first-sequence plane positioning workpiece and a second-sequence one-plane-two-pin positioning workpiece;

[0006] The first-sequence plane positioning workpiece includes a first-sequence bottom plate, a first-sequence transverse positioning fixture, and a first-sequence longitudinal positioning fixture; the first-sequence transverse positioning fixture and the first-sequence longitudinal positioning fixture respectively protrude from the upper end surface of the first-sequence bottom plate. The whole of the first-sequence transverse positioning fixture and the whole of the first-sequence longitudinal positioning fixture are perpendicular to each other. The first-sequence transverse positioning fixture can limit the triangular flat block to be machined laterally, and the first-sequence longitudinal positioning fixture can limit the triangular flat block to be machined longitudinally and position the horizontal plane of the triangular flat block to be machined. By limiting and fixing the two sides of the side end of the triangular flat block to be machined and limiting the horizontal plane through the two positioning fixtures, the accuracy and quality of the first-sequence machining are ensured;

[0007] The workpiece positioned by one plane and two pins in the second sequence includes a second-sequence bottom plate, a second-sequence cylindrical pin, and a second-sequence diamond pin. The second-sequence cylindrical pin and the second-sequence diamond pin respectively protrude from the upper end surface of the second-sequence bottom plate, and the connection line between the second-sequence cylindrical pin and the second-sequence diamond pin is perpendicular to the long-axis axis of the second-sequence diamond pin. The second-sequence cylindrical pin and the second-sequence diamond pin are respectively accurately sleeved in the through holes of the two circular convex columns machined in the first sequence of the triangular plane block. Through the one-plane-and-two-pins of the second-sequence bottom plate, the second-sequence cylindrical pin, and the second-sequence diamond pin, the triangular plane block machined in the first sequence can be quickly and accurately positioned, ensuring the machining accuracy of the second sequence.

[0008] The first-sequence horizontal positioning fixture includes a first-sequence horizontal limiting post A, a first-sequence horizontal limiting post B, and a first-sequence horizontal end-point limiting set screw. The first-sequence horizontal limiting post A and the first-sequence horizontal limiting post B are respectively vertically arranged on the upper end surface of the first-sequence bottom plate. The first-sequence horizontal end-point limiting set screw includes a first-sequence horizontal support post and a first-sequence horizontal limiting bolt. The lower end of the first-sequence horizontal support post is vertically fixed on the upper end surface of the first-sequence bottom plate. The first-sequence horizontal limiting bolt is horizontally threaded through the opposite side walls of the upper part of the first-sequence horizontal support post. The projection line of the extension line of the center line of the first-sequence horizontal limiting bolt on the upper end surface of the first-sequence bottom plate is perpendicular to the projection line of the connection line between the first-sequence horizontal limiting post A and the first-sequence horizontal limiting post B on the upper end surface of the first-sequence bottom plate. The first-sequence horizontal limiting post A and the first-sequence horizontal limiting post B play a role in limiting the horizontal side walls of the triangular block to be machined, and the first-sequence horizontal end-point limiting set screw plays a role in limiting and fixing the horizontal end points of the triangular block to be machined.

[0009] The first-sequence vertical positioning fixture includes a first-sequence vertical limiting post A, a first-sequence vertical limiting post B, and a first-sequence vertical end-point limiting set screw. The first-sequence vertical limiting post A and the first-sequence vertical limiting post B are respectively vertically arranged on the upper end surface of the first-sequence bottom plate. The extension line of the connection line between the first-sequence vertical limiting post A and the first-sequence vertical limiting post B is perpendicular to the connection line between the first-sequence horizontal limiting post A and the first-sequence horizontal limiting post B, and the first-sequence vertical limiting post A and the first-sequence vertical limiting post B are respectively arranged between the first-sequence horizontal limiting post A and the first-sequence horizontal end-point limiting set screw. The first-sequence vertical end-point limiting set screw includes a first-sequence vertical support post and a first-sequence vertical limiting bolt. The lower end of the first-sequence vertical support post is vertically fixed on the upper end surface of the first-sequence bottom plate. The first-sequence vertical limiting bolt is horizontally threaded through the opposite side walls of the upper part of the first-sequence vertical support post. The projection line of the extension line of the center line of the first-sequence vertical limiting bolt on the upper end surface of the first-sequence bottom plate is perpendicular to the projection line of the connection line between the first-sequence vertical limiting post A and the first-sequence vertical limiting post B on the upper end surface of the first-sequence bottom plate.

[0010] The first-order longitudinal limit posts A and B have the same height, and the heights of the first-order longitudinal limit posts A and B are both lower than that of the first-order transverse limit post A or the first-order transverse limit post B. The upper end surfaces of the first-order longitudinal limit posts A and B play a role in planar positioning of the triangular plane block to be processed.

[0011] The distance between the first-order longitudinal limit posts A and B is less than the diameter of the outer ring of the small convex ring of the automatic tensioner bracket, so that the first-order longitudinal limit posts A and B limit the rear end of the side wall of the small convex ring of the automatic tensioner bracket. Since the first-order longitudinal end limit screw limits the longitudinal end face of the triangular plane block to be processed, the first-order longitudinal limit posts A and B cooperate with the first-order longitudinal end limit screw to longitudinally limit and fix the triangular plane block to be processed.

[0012] The first-order transverse limit post A, the first-order transverse limit post B, the first-order longitudinal limit post A and the first-order longitudinal limit post B are inserted and fixed with the first-order bottom plate to meet the height requirements of different models of automatic tensioner brackets and facilitate replacement.

[0013] The first-order transverse limit post A, the first-order transverse limit post B, the first-order longitudinal limit post A and the first-order longitudinal limit post B are screwed and fixed with the first-order bottom plate to meet the height requirements of different models of automatic tensioner brackets and facilitate replacement.

[0014] The heights of both the first-order longitudinal limit posts A and B are 15 mm - 20 mm; the vertical height of the first-order longitudinal limit bolt is 20 mm - 26 mm.

[0015] The horizontal distance between the first-order longitudinal limit posts A and B is 10 mm - 23 mm.

[0016] The materials of the first-order planar positioning workpiece and the second-order one-plane-two-pin positioning workpiece are steel.

[0017] Beneficial effects

[0018] The present utility model respectively adopts planar positioning and one-plane-two-pin positioning methods to process the bracket, solving the machining accuracy and quality of the automatic tensioner bracket during the trial production process; enabling rapid and accurate positioning during the machining of the automatic tensioner bracket and ensuring the accuracy of the automatic tensioner bracket. Description of the drawings

[0019] Figure 1 It is a front structural schematic diagram of an existing automatic tensioner bracket.

[0020] Figure 2It is a schematic diagram of the reverse structure of the automatic tensioner bracket in the prior art.

[0021] Figure 3 It is a three-dimensional structure schematic diagram of the first-order planar positioning workpiece of the present utility model.

[0022] Figure 4 It is a top view structure schematic diagram of the first-order planar positioning workpiece of the present utility model.

[0023] Figure 5 It is a schematic diagram of the working principle structure of the first order of the present utility model.

[0024] Figure 6 It is a three-dimensional structure schematic diagram of the second-order one-plane-two-pin positioning workpiece of the present utility model.

[0025] Figure 7 It is a schematic diagram of the working principle structure of the second order of the present utility model.

[0026] In the figure:

[0027] 1', circular convex column; 11', through hole; 2', rib; 3', large circular convex disk; 31', center hole; 32', counterbore through hole; 4', small convex ring;

[0028] 1. It includes the first-order planar positioning workpiece; 11. The first-order bottom plate; 12. The first-order transverse positioning fixture; 121. The first-order transverse limiting column A; 122. The first-order transverse limiting column B; 123. The first-order transverse end limiting top screw; 1231. The first-order transverse support column; 1232. The first-order transverse limiting bolt; 13. The first-order longitudinal positioning fixture; 131. The first-order longitudinal limiting column A; 132. The first-order longitudinal limiting column B; 133. The first-order longitudinal end limiting top screw; 1331. The first-order longitudinal support column; 1332. The first-order longitudinal limiting bolt;

[0029] 2. The second-order one-plane-two-pin positioning workpiece; 21. The second-order bottom plate; 22. The second-order cylindrical pin; 23. The second-order diamond pin. Specific embodiments

[0030] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings rather than all of them.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0032] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] Embodiment 1

[0034] See Figures 3 - 7 As shown, an automatic tensioner bracket positioning tooling includes a first-order plane positioning workpiece 1 and a second-order one-plane-two-pin positioning workpiece 2;

[0035] The first-order plane positioning workpiece 1 includes a first-order bottom plate 11, a first-order transverse positioning fixture 12, and a first-order longitudinal positioning fixture 13; the first-order transverse positioning fixture 12 and the first-order longitudinal positioning fixture 13 respectively protrude from the upper end surface of the first-order bottom plate 11, and the whole of the first-order transverse positioning fixture 12 and the whole of the first-order longitudinal positioning fixture 13 are perpendicular to each other;

[0036] The second-order one-plane-two-pin positioning workpiece 2 includes a second-order bottom plate 21, a second-order cylindrical pin 22, and a second-order diamond pin 23; the second-order cylindrical pin 22 and the second-order diamond pin 23 respectively protrude from the upper end surface of the second-order bottom plate 21, and the connection line of the second-order cylindrical pin 22 and the second-order diamond pin 23 is perpendicular to the long axis of the second-order diamond pin 23.

[0037] The first-order transverse positioning fixture 12 includes a first-order transverse limit post A121, a first-order transverse limit post B122, and a first-order transverse end-point limit set screw 123. The first-order transverse limit post A121 and the first-order transverse limit post B122 are respectively vertically arranged on the upper end surface of the first-order bottom plate 11. The first-order transverse end-point limit set screw 123 includes a first-order transverse support post 1231 and a first-order transverse limit bolt 1232. The lower end of the first-order transverse support post 1231 is vertically fixed on the upper end surface of the first-order bottom plate 11. The first-order transverse limit bolt 1232 is horizontally threaded through the opposite side walls of the upper part of the first-order transverse support post 1231. The projection line of the extended center line of the first-order transverse limit bolt 1232 on the upper end surface of the first-order bottom plate 11 is perpendicular to the projection line of the connection line between the first-order transverse limit post A121 and the first-order transverse limit post B122 on the upper end surface of the first-order bottom plate 11.

[0038] The first-order longitudinal positioning fixture 13 includes a first-order longitudinal limit post A131, a first-order longitudinal limit post B132, and a first-order longitudinal end-point limit set screw 133. The first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 are respectively vertically arranged on the upper end surface of the first-order bottom plate 11. The extended line of the connection line between the first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 is perpendicular to the connection line between the first-order transverse limit post A121 and the first-order transverse limit post B122, and the first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 are respectively arranged between the first-order transverse limit post A121 and the first-order transverse end-point limit set screw 123. The first-order longitudinal end-point limit set screw 133 includes a first-order longitudinal support post 1331 and a first-order longitudinal limit bolt 1332. The lower end of the first-order longitudinal support post 1331 is vertically fixed on the upper end surface of the first-order bottom plate 11. The first-order longitudinal limit bolt 1332 is horizontally threaded through the opposite side walls of the upper part of the first-order longitudinal support post 1331. The projection line of the extended center line of the first-order longitudinal limit bolt 1332 on the upper end surface of the first-order bottom plate 11 is perpendicular to the projection line of the connection line between the first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 on the upper end surface of the first-order bottom plate 11.

[0039] The first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 have the same height, and the heights of the first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 are both lower than that of the first-order transverse limit post A121 or the first-order transverse limit post B122.

[0040] The distance between the first-order longitudinal limit post A131 and the first-order longitudinal limit post B132 is less than the diameter of the outer ring of the small convex ring of the automatic tensioning wheel bracket.

[0041] The first-order transverse limiting posts A121, first-order transverse limiting posts B122, first-order longitudinal limiting posts A131, and first-order longitudinal limiting posts B132 are fixed to the first-order bottom plate 11 by insertion.

[0042] The first-order transverse limiting posts A121, first-order transverse limiting posts B122, first-order longitudinal limiting posts A131, and first-order longitudinal limiting posts B132 are fixed to the first-order bottom plate 11 by screwing.

[0043] The heights of both the first-order longitudinal limiting posts A131 and first-order longitudinal limiting posts B132 are 15 mm - 20 mm; the vertical height of the first-order longitudinal limiting bolt 1332 is 20 mm - 26 mm.

[0044] The horizontal distance between the first-order longitudinal limiting posts A131 and first-order longitudinal limiting posts B132 is 10 mm - 23 mm.

[0045] The materials of the first-order planar positioning workpiece 1 and the second-order one-plane-two-pin positioning workpiece 2 are steel.

[0046] Working principle

[0047] First-order machining: Refer to Figures 1 - 5 As shown, first, the small convex ring 4' on the reverse side of the triangular planar block to be machined is machined.

[0048] Then, the first-order planar positioning workpiece 1 is placed on the workbench, and the triangular planar block with the small convex ring 4' is placed with its lower end face down on the upper end faces of the first-order longitudinal limiting posts A121 and first-order longitudinal limiting posts B122. The rear sides of the side walls of the small convex ring 4' are respectively limited and contacted by the side walls of the first-order longitudinal limiting posts A121 and first-order longitudinal limiting posts B122, so that the left end of the triangular planar block to be machined contacts the side walls of the first-order transverse limiting posts A121 and first-order transverse limiting posts B122. Rotate and adjust the length of the first-order transverse limiting bolt 1232 to limit and fix it to the end point on the right side of the triangular planar block to be machined; then rotate and adjust the length of the first-order longitudinal limiting bolt 1332 to limit and fix it to the end point at the lower end of the triangular planar block to be machined, completing the two-way limiting fixation and horizontal plane positioning of the triangular planar block with the small convex ring 4', and starting to machine the circular convex column 1', through hole 11', convex rib 2', large circular convex disk 3', and central hole 31' on the upper end face of the triangular planar block; after completion, remove the part completed in the first order from the first-order planar positioning workpiece 1.

[0049] Second-order machining: Refer to Figures 1 - 2 、 Figures 6 - 7As shown, place the workpiece 2 positioned by one plane and two pins in the second sequence on the workbench. Place the part completed in the first sequence face down on the workpiece 2 positioned by one plane and two pins in the second sequence, so that the through holes 11' of the two circular convex columns 1' on the front side machined in the first sequence are accurately inserted into the cylindrical pin 22 and the diamond pin 23 in the second sequence, completing the accurate positioning of one plane and two pins, and machining the remaining positions of the triangular plane block with the small convex ring 4'.

[0050] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes can be made to the present invention in terms of form and details without departing from the spirit and scope of the present invention defined by the appended claims, and all of them are within the protection scope of the present invention.

Claims

1. An automatic tensioning wheel bracket positioning tool, characterized in that: It comprises a first-order plane positioning workpiece (1) and a second-order one-face two-pin positioning workpiece (2); The first-order plane positioning workpiece (1) comprises a first-order base plate (11), a first-order transverse positioning fixture (12) and a first-order longitudinal positioning fixture (13); the first-order transverse positioning fixture (12) and the first-order longitudinal positioning fixture (13) are respectively provided with upper end surfaces of the first-order base plate (11), and the first-order transverse positioning fixture (12) and the first-order longitudinal positioning fixture (13) are perpendicular to each other as a whole; The second-order one-side-two-pin positioning workpiece (2) comprises a second-order base plate (21), a second-order cylindrical pin (22) and a second-order rhombus pin (23); the second-order cylindrical pin (22) and the second-order rhombus pin (23) are respectively protruding from the upper end surface of the second-order base plate (21), and the connecting line between the second-order cylindrical pin (22) and the second-order rhombus pin (23) is perpendicular to the long axis of the second-order rhombus pin (23).

2. The automatic tensioning wheel bracket positioning tool according to claim 1, characterized in that: The first-order transverse positioning fixture (12) comprises a first-order transverse limiting column A (121), a first-order transverse limiting column B (122) and a first-order transverse end point limiting top screw (123), wherein the first-order transverse limiting column A (121) and the first-order transverse limiting column B (122) are respectively vertically arranged on the upper end surface of the first-order bottom plate (11), and the first-order transverse end point limiting top screw (123) comprises a first-order transverse supporting column (1231) and a first-order transverse limiting bolt (1232). The lower end of the transverse support column (1231) is vertically fixed to the upper end surface of the first-order base plate (11); the first-order transverse limiting bolt (1232) is horizontally threaded and penetrates the upper opposite side wall of the first-order transverse support column (1231); the projection line of the center line extension line of the first-order transverse limiting bolt (1232) on the upper end surface of the first-order base plate (11) is perpendicular to the projection line of the connection line of the first-order transverse limiting column A (121) and the first-order transverse limiting column B (122) on the upper end surface of the first-order base plate (11).

3. The automatic tensioning wheel bracket positioning tool according to claim 2 is characterized in that: The first-order longitudinal positioning fixture (13) comprises a first-order longitudinal limiting column A (131), a first-order longitudinal limiting column B (132) and a first-order longitudinal end point limiting top screw (133), wherein the first-order longitudinal limiting column A (131) and the first-order longitudinal limiting column B (132) are respectively arranged vertically on the upper end surface of the first-order bottom plate (11), and the extension line of the connection line between the first-order longitudinal limiting column A (131) and the first-order longitudinal limiting column B (132) is perpendicular to the connection line between the first-order transverse limiting column A (121) and the first-order transverse limiting column B (122), and the first-order longitudinal limiting column A (131) and the first-order longitudinal limiting column B (132) are respectively arranged on the first-order transverse limiting column A (121) and the first-order transverse limiting column B (122). The first-order transverse end point limiting top screw (123) is between the first-order longitudinal end point limiting top screw (133); the first-order longitudinal end point limiting top screw (133) includes a first-order longitudinal support column (1331) and a first-order longitudinal limiting bolt (1332), the lower end of the first-order longitudinal support column (1331) is vertically fixed to the upper end surface of the first-order bottom plate (11), the first-order longitudinal limiting bolt (1332) is horizontally threaded and penetrates the upper opposite side wall of the first-order longitudinal support column (1331), and the projection line of the center line extension line of the first-order longitudinal limiting bolt (1332) on the upper end surface of the first-order bottom plate (11) is perpendicular to the projection line of the connection line of the first-order longitudinal limiting column A (131) and the first-order longitudinal limiting column B (132) on the upper end surface of the first-order bottom plate (11).

4. The automatic tensioning wheel bracket positioning tool according to claim 3 is characterized by: The first-order longitudinal limit column A (131) and the first-order longitudinal limit column B (132) have the same height, and the first-order longitudinal limit column A (131) and the first-order longitudinal limit column B (132) are both lower than the first-order transverse limit column A (121) or the first-order transverse limit column B (122).

5. The automatic tensioning wheel bracket positioning tool according to claim 4, characterized in that: The distance between the first-order longitudinal limit column A (131) and the first-order longitudinal limit column B (132) is smaller than the diameter of the outer ring of the small convex ring of the automatic tensioning wheel bracket.

6. The automatic tensioning wheel bracket positioning tool according to claim 5, characterized in that: The first-order transverse limiting column A (121), the first-order transverse limiting column B (122), the first-order longitudinal limiting column A (131) and the first-order longitudinal limiting column B (132) are plugged and fixed to the first-order bottom plate (11).

7. The automatic tensioning wheel bracket positioning tool according to claim 6, characterized in that: The first-order transverse limiting column A (121), the first-order transverse limiting column B (122), the first-order longitudinal limiting column A (131) and the first-order longitudinal limiting column B (132) are screwed and fixed to the first-order bottom plate (11).

8. The automatic tensioning wheel bracket positioning tool according to claim 7, characterized in that: The heights of the first-order longitudinal limit column A (131) and the first-order longitudinal limit column B (132) are both 15mm-20mm; the vertical height of the first-order longitudinal limit bolt (1332) is 20mm-26mm.

9. The automatic tensioning wheel bracket positioning tool according to claim 8, characterized in that: The horizontal distance between the first-order longitudinal limit column A (131) and the first-order longitudinal limit column B (132) is 10 mm-23 mm.

10. The automatic tensioning wheel bracket positioning tool according to claim 9, characterized in that: The first-order plane positioning workpiece (1) and the second-order one-face two-pin positioning workpiece (2) are made of steel.

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