Powder metallurgy chain wheel special-shaped bushing ring bushing tool

Abstract

The utility model relates to the technical field of bushing rings, in particular to a powder metallurgy chain wheel special-shaped bushing ring bushing tool. Comprising a base, a bottom plate, a positioning plate and press-fitting column heads, the base is of a rectangular plate structure, the bottom plate is arranged on the base, the positioning plate is arranged above the bottom plate, round holes are formed in the four corners of the positioning plate, reset assemblies are arranged in the round holes, the bottoms of the reset assemblies are fixedly arranged on the bottom plate, and the press-fitting column heads are arranged on the bottom plate. The positioning plate is provided with a fixed bushing ring hole which is in clearance fit with the press-fitting column head, and the positioning plate is provided with a circular positioning column. The special-shaped bushing ring can be efficiently inlaid, and mounting and dismounting are convenient. The special-shaped bushing ring bushing is mainly applied to the special-shaped bushing ring bushing of the powder metallurgy chain wheel.

Description

Technical Field

[0001] The utility model relates to the technical field of lining rings, and more specifically, to a special tooling for inserting an abnormal-shaped lining ring of a powder metallurgy sprocket wheel. Background Art

[0002] A special tooling is a type of tooling that is specifically designed and manufactured for the clamping requirement of a certain product part in a certain process, with a single service object and strong pertinence. After the blank of the powder metallurgy sprocket wheel part is made, a special ring needs to be inserted into the locking pin hole to increase the wear resistance when the locking pin slides. At present, the locking pin lining ring of such parts is a circular ring with a circular inner diameter and a circular outer diameter, and there is no direction requirement during fitting. It can be placed on the locking pin hole and pressed in. However, when an abnormal-shaped lining ring (with a rectangular inner diameter and a circular outer diameter) is fitted, there are fixed angular requirements with the sprocket wheel, and angular deviation will cause the product to be scrapped.

[0003] Moreover, with the above-mentioned fitting method, the lining ring and the product cannot effectively coincide, and it is easy to be inserted obliquely and scratch the hole wall during fitting. Therefore, it is necessary to set up corresponding fitting tooling to improve the fitting stability and facilitate disassembly and assembly. Summary of the Utility Model

[0004] In order to overcome the deficiencies in the above-mentioned prior art, the utility model provides a special tooling for inserting an abnormal-shaped lining ring of a powder metallurgy sprocket wheel.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] A special tooling for inserting an abnormal-shaped lining ring of a powder metallurgy sprocket wheel includes a base, a bottom plate, a positioning plate and a pressing head. The base adopts a rectangular plate structure. The bottom plate is arranged on the base. The positioning plate is arranged above the bottom plate. Circular holes are opened at the four corners of the positioning plate. A reset assembly is arranged in the circular holes. The bottom of the reset assembly is fixedly arranged on the bottom plate. A pressing head is arranged on the bottom plate. A fixed lining ring hole with a clearance fit with the pressing head is opened on the positioning plate. A circular positioning column is arranged on the positioning plate.

[0007] The reset assembly includes a guide post, a reset spring and a guide post limiting boss. The bottom of the guide post is fixed on the bottom plate. The top of the guide post passes through the circular hole. The reset spring is sleeved outside the guide post between the bottom plate and the positioning plate. The guide post limiting boss is fixedly arranged at the top of the guide post. The diameter of the guide post limiting boss is larger than the diameter of the circular hole.

[0008] A groove is opened at the central position of the upper surface of the bottom plate. Two bottom plate threaded holes are respectively arranged on both sides in the groove. A limiting block is connected to the bottom plate threaded hole.

[0009] The press-fitting stud head includes a stud head positioning boss and a flat square at the flat head tail. The stud head positioning boss is fixedly arranged on the top of the flat square at the flat head tail, and the stud head positioning boss penetrates through the fixed lining ring hole.

[0010] A stud head installation hole is formed at the bottom of the bottom plate. The flat square at the flat head tail is correspondingly arranged in the stud head installation hole, and the stud head positioning boss extends out of the top of the stud head installation hole.

[0011] Positioning screw holes are arranged at the four corners of the bottom plate.

[0012] A positioning pin is arranged on the positioning plate.

[0013] Handheld handles are arranged on both sides of the base.

[0014] The circular positioning post is arranged 5 mm higher than the positioning plate.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The center of the product is positioned by the circular positioning post, and the direction of the product is positioned by the positioning pin; the lining ring is placed through the circular positioning post; the press-fitting stud head of the lining ring is located below the round hole and is in the same direction as the product on the fixed plate. The upper die punch contacts the product and presses the product down, causing the positioning plate to move. That is, the end face of the product is made to fit with the lining ring and pressed into the locking pin hole by the pressing method, realizing the press-fitting process of the lining ring. After the positioning plate contacts the limit block, the positioning plate no longer moves downward.

[0017] The reset spring below the positioning plate resets it, and the product resets after the press-fitting is completed, thus facilitating installation and disassembly. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of the present utility model from another angle;

[0020] Figure 3 It is a schematic diagram of the bottom plate of the present utility model;

[0021] Figure 4 It is a schematic diagram of the positioning plate of the present utility model;

[0022] Figure 5 It is a schematic diagram of the press-fitting stud head of the present utility model;

[0023] Figure 6 It is a schematic diagram of the guide post of the present utility model;

[0024] Figure 7 It is a schematic diagram of the bottom of the bottom plate of the present utility model;

[0025] Figure 8 Schematic diagram of a return spring

[0026] Figure 9 Schematic diagram of a lining ring

[0027] In the figure: 1 is the base, 11 is the hand-held handle, 2 is the bottom plate, 21 is the bottom plate groove, 22 is the bottom plate threaded hole, 23 is the limit block, 24 is the positioning screw hole, 25 is the stud mounting hole, 3 is the guide post, 31 is the return spring, 32 is the guide post limit boss, 4 is the positioning plate, 41 is the positioning pin, 42 is the circular positioning post, 43 is the fixed lining ring hole, 44 is the circular hole, 5 is the press-fitted stud, 51 is the stud positioning boss, 52 is the flat head and flat square at the tail, 6 is the product, 7 is the lining ring. Specific implementation mode

[0028] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0029] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0030] As Figures 1 to 9 shown, a powder metallurgy sprocket special-shaped lining ring insert tooling includes a base 1, a bottom plate 2, a positioning plate 4 and a press-fitted stud 5. The base 1 adopts a rectangular plate structure. The bottom plate 2 is arranged on the base 1. The positioning plate 4 is arranged above the bottom plate 2. Circular holes 44 are opened at the four corners of the positioning plate 4. A return assembly is arranged in the circular holes 44. The bottom of the return assembly is fixedly arranged on the bottom plate 2. A press-fitted stud 5 is arranged on the bottom plate 2. A fixed lining ring hole 43 with a clearance fit with the press-fitted stud 5 is opened on the positioning plate 4. A circular positioning post 42 is arranged on the positioning plate 4.

[0031] Preferably, the return assembly includes a guide post 3, a return spring 31 and a guide post limit boss 32. The bottom of the guide post 3 is fixed on the bottom plate 2. The top of the guide post 3 passes through the circular hole 44. The return spring 31 is sleeved outside the guide post 3 between the bottom plate 2 and the positioning plate 4. The guide post limit boss 32 is fixedly arranged at the top of the guide post 3. The diameter of the guide post limit boss 32 is larger than the diameter of the circular hole 44.

[0032] Preferably, a groove 21 is opened at the center position of the upper surface of the bottom plate 2. Two bottom plate threaded holes 22 are respectively arranged on both sides in the groove 21. A limit block 23 is connected to the bottom plate threaded hole 22.

[0033] Preferably, the press-fitting stud 5 includes a stud positioning boss 51 and a flat head tail flat square 52. The stud positioning boss 51 is fixedly arranged on the top of the flat head tail flat square 52, and the stud positioning boss 51 penetrates through the fixed lining ring hole 43 and is arranged.

[0034] Preferably, a stud mounting hole 25 is formed at the bottom of the base plate 2. The flat head tail flat square 52 is correspondingly arranged in the stud mounting hole 25, and the stud positioning boss 51 extends out of the top of the stud mounting hole 25 and is arranged.

[0035] Preferably, positioning screw holes 24 are arranged at the four corners of the base plate 2.

[0036] Preferably, a positioning pin 41 is arranged on the positioning plate 4.

[0037] Preferably, hand-held handles 11 are arranged on both sides of the base 1.

[0038] Preferably, the circular positioning post 42 is set 5 mm higher than the positioning plate 4.

[0039] During installation, fix the base 1 on the shaft inserting machine. After passing four guide posts 3 through the four circular holes 44 of the positioning plate 4, sleeved with return springs 31 on the guide posts 3, and then fixedly connect the four guide posts 3 to the base plate 2. Install the lining ring 7 into the fixed lining ring hole 43 according to the direction and sleeve it on the stud positioning boss 51. Set the central hole of the product 6 on the circular positioning post 42 of the positioning plate 4, and align the flat hole with the positioning pin 41 to ensure the direction of the product. The upper die punch contacts the product 6 and presses the product 6 downwards. The positioning plate 4 is pressed downwards simultaneously with the product 6. The press-fitting stud 5 moves upwards relative to the positioning plate 4, and presses the lining ring 7 into the product locking pin hole. After pressing down a certain stroke, the positioning plate 4 contacts the limit block 23, and the positioning plate 4 stops moving downwards. After the upper die punch is withdrawn, the return spring 31 makes the positioning plate 4 move upwards and stops after contacting the guide post limit boss 32, and then take out the product.

[0040] Only the preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention, and all such changes should be included within the protection scope of the present invention.

Claims

1. A powder metallurgy sprocket special-shaped bushing inserting tool, characterized in that: The invention comprises a base (1), a bottom plate (2), a positioning plate (4) and a press-fit column head (5), wherein the base (1) adopts a rectangular plate structure, the bottom plate (2) is arranged on the base (1), the positioning plate (4) is arranged above the bottom plate (2), circular holes (44) are provided at four corners of the positioning plate (4), a reset component is provided in the circular hole (44), the bottom of the reset component is fixedly provided on the bottom plate (2), a press-fit column head (5) is provided on the bottom plate (2), a fixed bushing hole (43) which is clearance-matched with the press-fit column head (5) is provided on the positioning plate (4), and a circular positioning column (42) is provided on the positioning plate (4).

2. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: The reset assembly comprises a guide column (3), a reset spring (31) and a guide column limiting boss (32); the bottom of the guide column (3) is fixed on the bottom plate (2); the top of the guide column (3) passes through the circular hole (44); the reset spring (31) is sleeved on the outside of the guide column (3) between the bottom plate (2) and the positioning plate (4); the guide column limiting boss (32) is fixed on the top of the guide column (3); and the diameter of the guide column limiting boss (32) is greater than the diameter of the circular hole (44).

3. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: A groove (21) is provided at the center of the upper surface of the bottom plate (2), two bottom plate threaded holes (22) are provided on both sides of the groove (21), and a limit block (23) is connected to the bottom plate threaded hole (22).

4. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: The press-fit column head (5) comprises a column head positioning boss (51) and a flat head tail flat square (52), wherein the column head positioning boss (51) is fixedly arranged on the top of the flat head tail flat square (52), and the column head positioning boss (51) is arranged to pass through the fixed bushing ring hole (43).

5. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 4, characterized in that: A column head mounting hole (25) is provided at the bottom of the base plate (2), the flat square at the tail of the flat head (52) is correspondingly arranged in the column head mounting hole (25), and the column head positioning boss (51) extends out of the top of the column head mounting hole (25).

6. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: Positioning screw holes (24) are provided at the four corners of the bottom plate (2).

7. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: The positioning plate (4) is provided with a positioning pin (41).

8. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: Handlebars (11) are provided on both sides of the base (1).

9. The powder metallurgy sprocket special-shaped bushing inserting tool according to claim 1, characterized in that: The circular positioning column (42) is set 5 mm higher than the positioning plate (4).

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