Positioning and limiting mechanism for one-time assembly die of tractor

Abstract

The utility model relates to a positioning device, in particular to a positioning and limiting mechanism for a one-time assembly die of a tractor, which comprises an index plate, a slider component and a cam plate, guide grooves are arranged on the index plate along the circumferential direction in an array manner, and the guide grooves extend along the radial direction of the index plate; the sliding block assembly slides along the guide groove. Traction grooves are formed in the cam disc in the circumferential direction in an array mode, the traction grooves and the guide grooves are in one-to-one correspondence, the traction grooves are gradually close to the circle center from the head end to the tail end, and the pin shaft penetrates through one end of the sliding block assembly and extends to the traction grooves; the cam disc is connected with the index plate in a relative rotation mode. The positioning and limiting mechanism for the one-time assembly die of the tractor can meet the positioning requirements of products of various models.

Description

Technical Field

[0001] The utility model relates to a positioning device, in particular to a positioning and limiting mechanism for a tractor primary assembly die. Background Art

[0002] When welding a rim, it is necessary to position the workpiece. Different models of products have different inner diameter sizes, so the designed fixture needs to meet the processing requirements of multiple models of products. The utility model patent with the publication number CN215787807U discloses a positioning and clamping device for welding a wheel spoke and a rim, which completes the positioning and clamping of the workpiece through a radially slidable upper clamp block, so as to adapt to the welding requirements of different models of products. In this patent, the upper clamp block is driven to slide by electricity, which limits its usage scenarios. Based on this, improvements need to be made. Summary of the Utility Model

[0003] Technical Purpose: In order to overcome the deficiencies in the prior art, the utility model provides a positioning and limiting mechanism for a tractor primary assembly die.

[0004] Technical Solution: To achieve the above purpose, a positioning and limiting mechanism for a tractor primary assembly die disclosed by the utility model includes:

[0005] An indexing plate, which is circumferentially provided with guide grooves arrayed along the circumferential direction, and the guide grooves extend radially along the indexing plate;

[0006] A slider assembly, which slides along the guide grooves;

[0007] A cam disc, which is circumferentially provided with traction grooves arrayed along the circumferential direction, the traction grooves correspond to the guide grooves one by one, the traction grooves gradually approach the center of the circle from the head end to the tail end, and a pin shaft passes through one end of the slider assembly and extends into the traction grooves; the cam disc is rotatably connected to the indexing plate relatively.

[0008] Preferably, the slider assembly includes a slider body, a positioning block and a cover plate. The slider body is slidably connected in the guide grooves, the positioning block is fixedly connected to the slider body and the positioning block is slidably connected above the guide grooves, the cover plate is arranged below the slider body, and the cover plate, the slider body and the positioning block are fixedly connected to each other.

[0009] Preferably, a bearing sleeve is arranged at the center of the indexing plate, a rotating shaft is connected in the bearing sleeve through a bearing, and one end of the rotating shaft extends above the cam disc and is connected with a handle.

[0010] Preferably, it further includes a base and an offset washer. The offset washer is fixedly connected above the base, and the indexing plate is fixedly connected above the offset washer.

[0011] Preferably, a groove for cooperating with the workpiece is arranged at the end of the positioning block.

[0012] Preferably, the positioning block is provided with an oil inlet hole communicating the upper and lower surfaces, and the oil inlet hole is filled with felt; the lower surface of the positioning block is provided with an I-shaped lubricating groove.

[0013] The utility model has the following beneficial effects.

[0014] (1) The workpiece to be welded is clamped by the slidable block assembly that can move radially. The radial distance of the movement of the slidable block can be applicable to welding workpieces with different inner diameters, and the positioning of the workpiece can be realized by manually operating the rotating shaft, which is convenient to operate.

[0015] (2) When the height of the product to be welded changes, different offset washers can be replaced to adapt to the product to be welded, which has strong flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the utility model;

[0017] Figure 2 is the top view of the utility model;

[0018] Figure 3 is the schematic structural view of the indexing plate in the utility model;

[0019] Figure 4 is the front view of the positioning block in the utility model;

[0020] Figure 5 is the bottom view of the positioning block in the utility model;

[0021] Figure 6 is the schematic structural view of the cam disc in the utility model.

[0022] In the figure, 1, indexing plate; 2, guide groove; 3, slidable block assembly; 4, cam disc; 5, traction groove; 6, slidable block body; 7, positioning block; 8, cover plate; 9, bearing sleeve; 10, rotating shaft; 11, handle; 12, base; 13, offset washer; 14, groove; 15, oil inlet hole; 16, lubricating groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following describes the principle and features of the utility model in conjunction with the appended Figure 1 to the appended Figure 6 The principle and features of the utility model are described, and the examples given are only used to explain the utility model and are not intended to limit the scope of the utility model.

[0024] A positioning and limiting mechanism for a tractor one-time assembly die includes an indexing plate 1, a slidable block assembly 3, a cam disc 4, a base 12 and an offset washer 13.

[0025] The offset washer 13 is fixedly connected above the base 12. For welding products (rims) of different heights, the entire device can be adapted to the welding product by replacing the offset washer 13 with an appropriate height. The indexing plate 1 is fixedly connected above the offset washer 13. The indexing plate 1 is provided with guide grooves 2 arranged in a circumferential array, and the guide grooves 2 extend along the radial direction of the indexing plate 1. The number of the guide grooves 2 should be at least three, and six guide grooves 2 are provided in this embodiment. The slider assembly 3 is slidably connected along the guide grooves 2. The slider assembly 3 includes a slider body 6, a positioning block 7, and a cover plate 8. The slider body 6 is slidably connected in the guide grooves 2 and can reciprocate along the extending direction of the guide grooves 2. The positioning block 7 and the cover plate 8 are respectively installed above and below the slider body 6. Among them, the positioning block 7 slides along with the slider body 6 to the upper part of the guide grooves 2, and the cover plate 8 slides along with the slider body 6 to the lower part of the guide grooves 2. The cover plate 8, the slider body 6, and the positioning block 7 are fixed to each other by bolts. A groove 14 matching the workpiece is provided at the end of the positioning block 7. In order to meet the lubrication requirements of the sliding assembly 3, an oil inlet hole 15 communicating the upper and lower surfaces is provided in the positioning block 7, and a felt is filled in the oil inlet hole 15. The felt needs to be removed when injecting lubricating oil. An I-shaped lubricating groove 16 is provided on the lower surface of the positioning block 7, and the bottom of the oil inlet hole 15 is located in the lubricating groove 16.

[0026] Both the indexing plate 1 and the cam plate 4 are circular. A bearing sleeve 9 is fixedly connected at the center of the indexing plate 1. A rotating shaft 10 is connected in the bearing sleeve 9 through a bearing. One end of the rotating shaft 10 extends above the cam plate 4 and is connected with a handle 11. The cam plate 4 is installed above the indexing plate 1 and is circumferentially fixed to the rotating shaft 10. That is, the cam plate 4 can be driven to rotate relative to the indexing plate 1 by rotating the rotating shaft 10. The cam plate 4 is provided with traction grooves 5 arranged in a circumferential array, and the traction grooves 5 correspond to the guide grooves 2 one by one. And the traction grooves 5 gradually approach the center of the cam plate 4 from the head end to the tail end. A pin shaft passes through one end of the slider assembly 3 and extends into the traction grooves 5. Due to the design feature that the traction grooves 5 gradually approach the center of the cam plate 4 from the head end to the tail end, rotating the cam plate 4 can drive the slider assembly 3 to slide radially, thereby completing the positioning of the workpiece to be welded.

[0027] It should be noted that in addition to the workpiece to be welded referred to in this embodiment being a rim, this product is also applicable to the positioning requirements of any annular part.

[0028] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positioning and limiting mechanism for a tractor primary assembly mold, characterized in that: include: A dividing plate (1), wherein the dividing plate (1) is provided with guide grooves (2) in a circumferential array, and the guide grooves (2) extend in the radial direction of the dividing plate (1); A slider assembly (3), wherein the slider assembly (3) slides along the guide groove (2); A cam plate (4) is provided with traction grooves (5) in a circumferential array, the traction grooves (5) corresponding to the guide grooves (2) one by one, the traction grooves (5) gradually approach the center of the circle from the head end to the tail end, and the pin passes through one end of the slider assembly (3) and extends to the traction groove (5); the cam plate (4) is connected to the dividing plate (1) for relative rotation.

2. The tractor primary assembly mold positioning and limiting mechanism according to claim 1, characterized in that: The slider assembly (3) comprises a slider body (6), a positioning block (7) and a cover plate (8); the slider body (6) is slidably connected in the guide groove (2); the positioning block (7) is fixedly connected to the slider body (6) and the positioning block (7) is slidably connected above the guide groove (2); the cover plate (8) is arranged below the slider body (6); and the cover plate (8), the slider body (6) and the positioning block (7) are fixed to each other.

3. The positioning and limiting mechanism for the tractor primary assembly mold according to claim 1, characterized in that: A bearing sleeve (9) is arranged at the center of the indexing plate (1), a rotating shaft (10) is connected to the bearing sleeve (9) via a bearing, and one end of the rotating shaft (10) extends above the cam plate (4) and is connected to a handle (11).

4. The tractor primary assembly mold positioning and limiting mechanism according to claim 1, characterized in that: It also comprises a base (12) and an offset washer (13), wherein the offset washer (13) is fixedly connected to the top of the base (12), and the indexing plate (1) is fixedly connected to the top of the offset washer (13).

5. The tractor primary assembly mold positioning and limiting mechanism according to claim 2, characterized in that: The end of the positioning block (7) is provided with a groove (14) that matches the workpiece.

6. The positioning and limiting mechanism for the primary assembly mold of the tractor according to claim 2, characterized in that: The positioning block (7) is provided with an oil inlet hole (15) communicating with the upper and lower surfaces, and the oil inlet hole (15) is filled with felt; the lower surface of the positioning block (7) is provided with an I-shaped oil lubrication groove (16).

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