Adjustable pin shaft structure

Abstract

The utility model discloses an adjustable pin shaft structure, which relates to the technical field of pin shaft production, and comprises a working table, workpiece rectangular tube components are symmetrically arranged at the upper end of the working table, a plurality of groups of workpiece shaft sleeves are arranged between the workpiece rectangular tube components, first tool positioning seats are arranged at the lower ends of the workpiece shaft sleeves, and the first tool positioning seats are arranged on the working table. A pressing plate is arranged at the upper end of the workpiece shaft sleeve, second tool positioning seats are symmetrically arranged on the two sides of the workpiece rectangular pipe assembly, a special inner supporting rod is connected between the two second tool positioning seats, and the adjusting pin shaft body is arranged between the pressing plate and the workpiece rectangular pipe assembly. According to the adjustable pin shaft structure, the overall structure of the pin shaft is changed into a combined structure, then adjustment of the positioning size of the pin shaft is achieved, the pin shaft structure is optimized to be in an adjustable mode, positioning and matching of the pin shaft are more accurate, and therefore the purposes of reducing easy abrasion and being convenient to disassemble and assemble are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pin shaft production, in particular to an adjustable pin shaft structure. Background Art

[0002] In the manufacturing process of metal structural parts with high precision requirements, such as scissor arms, connecting rods and other products, the fork shaft sleeve hole often needs to be positioned with a pin. The pin is a standardized fastener, which is mainly used for the hinge of two parts. It can be statically fixed or move relative to the connected parts to form a hinge connection.

[0003] Existing technical solutions ( Figure 1-Figure 2 ), the traditional pin shaft 1 is made of 40Cr material, which causes the mating surface to be easily worn, and long-term use will reduce the accuracy of the pin shaft mating surface. In the production process of the pin shaft, a workbench 10 is used, and the workbench 10 includes a workpiece matrix tube assembly 11, a workpiece sleeve 12, a first tooling positioning seat 13, a pressure plate 14, a second tooling positioning seat 15, and a special inner support rod 16. When in use, the workpiece sleeve 12 needs to be placed on the first tooling positioning seat 13, and pressed by the pressure plate 14, and the traditional pin shaft 1 is inserted into the workpiece sleeve 12, and the traditional pin shaft 1 is pressed by the pressure plate 14 and the second tooling positioning seat 15, and the workpiece matrix tube assembly 11 is clamped by the special inner support rod 16. The whole process requires frequent disassembly and assembly of the pressure plate 14 and the traditional pin shaft 1. Due to the high assembly accuracy requirements of the pin shaft and the workpiece sleeve 12, rapid disassembly and assembly cannot be achieved, resulting in easy wear of the mating surface of the pin shaft, affecting the matching accuracy with the workpiece sleeve 12, thereby reducing the service life.

[0004] Based on this, an adjustable pin structure is now provided to eliminate the disadvantages of the existing structure. Utility Model Content

[0005] The utility model aims to provide an adjustable pin structure to solve the problems in the background art that quick disassembly and assembly cannot be achieved, the matching surface of the pin is easy to wear and the service life is reduced.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An adjustable pin shaft structure comprises a workbench, wherein a workpiece matrix tube assembly is symmetrically arranged at the upper end of the workbench, a plurality of groups of workpiece shaft sleeves are installed between the workpiece matrix tube assemblies, a first tooling locating seat is arranged at the lower end of the workpiece shaft sleeve, a pressure plate is arranged at the upper end of the workpiece shaft sleeve, second tooling locating seats are symmetrically arranged on both sides of the workpiece matrix tube assembly, a special inner support rod is connected between the two second tooling locating seats, and also comprises an adjusting pin shaft body, wherein the adjusting pin shaft body is arranged between the pressure plate and the workpiece matrix tube assembly.

[0008] Preferably, the adjusting pin shaft body includes an adjusting screw, an expansion sleeve, a tapered sleeve, and an adjusting nut. The tapered sleeve is arranged on the outside of the adjusting screw, the internal thread of the tapered sleeve is connected to the adjusting screw, the expansion sleeve is arranged on one side of the tapered sleeve, and the end of the adjusting screw away from the expansion sleeve is threadedly connected to the adjusting nut.

[0009] Preferably, a connecting sleeve is provided on the side of the adjusting screw rod close to the expansion sleeve, a mounting plate is clamped on the outer side of the connecting sleeve, and the expansion sleeve is fixedly connected to the connecting sleeve via the mounting plate.

[0010] Preferably, a first retaining ring is provided at a position corresponding to the adjusting screw and the connecting sleeve, and a size of the first retaining ring is D10.

[0011] Preferably, a plurality of fixing parts are installed on a side of the cone sleeve close to the adjusting nut, and the adjusting nut is fixedly connected to the fixing parts by screws.

[0012] Preferably, one end of the cone sleeve is configured to be cone-shaped, and the size of the inner wall of the expansion sleeve is matched with the outer wall of the cone sleeve.

[0013] Preferably, a second retaining ring is provided at a position corresponding to the connecting sleeve and the mounting plate, and a size of the second retaining ring is D30.

[0014] Preferably, the distance between the connecting sleeve and the cone sleeve is set to a, and a is 0-1 mm.

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

[0016] The utility model provides an adjustable pin shaft structure, which changes the overall structure of the pin shaft into a combined structure, thereby realizing the adjustment of the positioning size of the pin shaft, greatly improving the work efficiency, and can realize the rapid disassembly and assembly of the pin shaft by changing the pin shaft structure, and the expansion sleeve material is selected from high-quality bearing steel GCr15, thereby improving the high wear resistance of the pin shaft, and by optimizing the pin shaft structure to an adjustable mode, the pin shaft positioning and cooperation are made more precise, thereby achieving the purpose of reducing easy wear, improving positioning accuracy, facilitating disassembly and assembly, and increasing the service life of the pin shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a traditional pin in the prior art.

[0018] Figure 2 It is a structural schematic diagram of the working state of the prior art.

[0019] Figure 3 It is a schematic diagram of the structure of the utility model when it is working.

[0020] Figure 4 It is a structural schematic diagram of the utility model.

[0021] Figure 5 It is the overall structure diagram of the adjusting pin body of the utility model.

[0022] Figure 6 It is a cross-sectional structural diagram of the adjusting pin body of the utility model.

[0023] Notes on the accompanying drawings: 1. Traditional pin; 10. Workbench; 11. Workpiece torque tube assembly; 12. Workpiece sleeve; 13. First tooling locating seat; 14. Pressure plate; 15. Second tooling locating seat; 16. Special inner support rod; 20. Adjusting pin body; 21. Adjusting screw; 22. Expansion sleeve; 23. Taper sleeve; 24. Adjusting nut; 25. Connecting sleeve; 26. Mounting plate; 27. First retaining ring; 28. Fixing piece; 29. ​​Screw; 30. Second retaining ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] Example 1

[0026] In this embodiment, if Figure 3-Figure 6 As shown, an adjustable pin structure includes a workbench 10, a workpiece matrix tube assembly 11 is symmetrically arranged on the upper end of the workbench 10, a plurality of workpiece shaft sleeves 12 are installed between the workpiece matrix tube assemblies 11, an adjusting pin shaft body 20 is inserted into the workpiece shaft sleeve 12, and axially tightened to play a limiting effect, a first tooling locating seat 13 is arranged at the lower end of the workpiece shaft sleeve 12, a pressing plate 14 is arranged at the upper end of the workpiece shaft sleeve 12, and the position between the workpiece shaft sleeve 12 and the first tooling locating seat 13 is fixed by pressing the pressing plate 14, and the workpiece shaft sleeve 12 and the first tooling locating seat 13 are fixed by pressing the pressing plate 14. The two sides of the workpiece rectangular tube assembly 11 are symmetrically provided with second tooling positioning seats 15, and a special inner support rod 16 is connected between the two second tooling positioning seats 15. The two workpiece rectangular tube assemblies 11 are clamped by the special inner support rod 16. The adjusting pin shaft body 20 is also included. The adjusting pin shaft body 20 is arranged between the pressing plate 14 and the workpiece rectangular tube assembly 11. The traditional pin shaft 1 cannot adjust the radial positioning size. The adjusting pin shaft body 20 changes the structural mode of the traditional pin shaft 1 from the traditional independent mode to the combined mode, which is convenient for quick disassembly and assembly;

[0027] Among them Figure 3 and Figure 4As shown, the adjusting pin shaft body 20 includes an adjusting screw 21, an expansion sleeve 22, a taper sleeve 23, and an adjusting nut 24. One end of the adjusting screw 21 is inserted into the interior of the first tooling positioning seat 13 to fix the position of the adjusting pin shaft body 20. The taper sleeve 23 is arranged on the outside of the adjusting screw 21. The inner thread of the taper sleeve 23 is connected with the adjusting screw 21. The expansion sleeve 22 is arranged on one side of the taper sleeve 23. The material of the expansion sleeve 22 is selected from high-quality bearing steel GCr15, so that the matching surface is more wear-resistant. The end of the adjusting screw 21 away from the expansion sleeve 22 is threadedly connected with the adjusting nut 24. The adjusting nut 24 is rotated by an external pneumatic wrench or an electric wrench, so that the adjusting screw 21 is driven to rotate relative to the taper sleeve 23, and then the adjusting screw 21 is spirally moved along the direction of the taper sleeve 23.

[0028] Among them Figure 6 As shown, a connecting sleeve 25 is provided on one side of the adjusting screw 21 close to the expanding sleeve 22, and a mounting plate 26 is clamped on the outer side of the connecting sleeve 25. The expanding sleeve 22 is fixedly connected to the connecting sleeve 25 through the mounting plate 26, so that when the adjusting screw 21 rotates relative to the cone sleeve 23, the connecting sleeve 25, the mounting plate 26 and the expanding sleeve 22 can be driven to rotate, so that the expanding sleeve 22 can be fine-tuned radially along the cone sleeve 23 to achieve a positioning effect;

[0029] Among them Figure 4-Figure 6 As shown, a plurality of fixing members 28 are installed on one side of the cone sleeve 23 close to the adjusting nut 24, and the adjusting nut 24 is fixedly connected to the fixing member 28 by means of screws 29, so that when the adjusting nut 24 is rotated, the adjusting screw 21 can move relative to the cone sleeve 23, thereby ensuring the normal use of the structure;

[0030] Among them Figure 6 As shown, one end of the cone sleeve 23 is set to be cone-shaped, and the size of the inner wall of the expansion sleeve 22 is adapted to the outer wall of the cone sleeve 23. Since there is a gap between the connecting sleeve 25 and the cone sleeve 23, the expansion sleeve 22 can move along the surface of the cone sleeve 23, thereby increasing the overall stability of the structure;

[0031] Among them Figure 6 As shown, the distance between the connecting sleeve 25 and the tapered sleeve 23 is set to a, and a is 0-1 mm, so that the expansion sleeve 22 can be radially fine-tuned along the tapered surface of the tapered sleeve 23, thereby tightening the workpiece shaft sleeve 12, and the positioning is accurate, which can meet the positioning adjustment requirements;

[0032] Example 2

[0033] The difference from Example 1 is that Figure 6 As shown, a first retaining ring 27 is provided at the position corresponding to the adjusting screw 21 and the connecting sleeve 25. The size of the first retaining ring 27 is D10, which plays an axial limiting role, can prevent axial movement of other components, increase structural stability, and improve wear resistance;

[0034] Among them Figure 6 As shown, a second retaining ring 30 is provided at the position corresponding to the connecting sleeve 25 and the mounting plate 26. The size of the second retaining ring 30 is D30. The size specification of the second retaining ring 30 is compatible with the connecting sleeve 25 and the mounting plate 26 to avoid component movement and increase the axial limiting effect.

[0035] During use, when it is necessary to install the adjusting pin shaft body 20, the adjusting pin shaft body 20 is inserted into the workpiece shaft sleeve 12, so that the adjusting screw 21 is axially tightened against the workpiece shaft sleeve 12, and the adjusting nut 24 is rotated by an external pneumatic wrench or an electric wrench, so that the adjusting screw 21 is driven to rotate relative to the tapered sleeve 23, and then the adjusting screw 21 is spirally moved along the direction of the tapered sleeve 23, increasing the gap between the connecting sleeve 25 and the tapered sleeve 23, so that the expansion sleeve 22 is radially fine-tuned along the tapered sleeve 23 to achieve the positioning effect. When it is necessary to disassemble and assemble the adjusting pin shaft body 20, the adjusting nut 24 is rotated in the opposite direction to reduce the gap between the connecting sleeve 25 and the tapered sleeve 23, thereby achieving a quick disassembly and assembly effect.

[0036] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An adjustable pin structure, comprising a workbench (10), wherein a workpiece matrix tube assembly (11) is symmetrically arranged at the upper end of the workbench (10), a plurality of groups of workpiece sleeves (12) are installed between the workpiece matrix tube assemblies (11), a first tooling locating seat (13) is arranged at the lower end of the workpiece sleeve (12), a pressing plate (14) is arranged at the upper end of the workpiece sleeve (12), second tooling locating seats (15) are symmetrically arranged on both sides of the workpiece matrix tube assembly (11), and a dedicated inner support rod (16) is connected between the two second tooling locating seats (15); It is characterized in that It also comprises an adjusting pin shaft body (20), wherein the adjusting pin shaft body (20) is arranged between the pressing plate (14) and the workpiece torque tube assembly (11).

2. The adjustable pin structure according to claim 1, characterized in that: The adjusting pin shaft body (20) comprises an adjusting screw (21), an expansion sleeve (22), a taper sleeve (23), and an adjusting nut (24); the taper sleeve (23) is arranged on the outside of the adjusting screw (21); the inner part of the taper sleeve (23) is threadedly connected to the adjusting screw (21); the expansion sleeve (22) is arranged on one side of the taper sleeve (23); and the end of the adjusting screw (21) away from the expansion sleeve (22) is threadedly connected to the adjusting nut (24).

3. The adjustable pin structure according to claim 2, characterized in that: A connecting sleeve (25) is provided on one side of the adjusting screw rod (21) close to the expansion sleeve (22), a mounting plate (26) is clamped on the outer side of the connecting sleeve (25), and the expansion sleeve (22) is fixedly connected to the connecting sleeve (25) via the mounting plate (26).

4. The adjustable pin structure according to claim 3, characterized in that: A first retaining ring (27) is provided at a position corresponding to the adjusting screw rod (21) and the connecting sleeve (25), and the size of the first retaining ring (27) is D10.

5. The adjustable pin structure according to claim 2, characterized in that: A plurality of fixing members (28) are installed on one side of the cone sleeve (23) close to the adjusting nut (24), and the adjusting nut (24) is fixedly connected to the fixing members (28) via screws (29).

6. The adjustable pin structure according to claim 2, characterized in that: One end of the cone sleeve (23) is configured to be cone-shaped, and the size of the inner wall of the expansion sleeve (22) is compatible with the outer wall of the cone sleeve (23).

7. The adjustable pin structure according to claim 3, characterized in that: A second retaining ring (30) is provided at a position corresponding to the connecting sleeve (25) and the mounting plate (26), and the size of the second retaining ring (30) is D30.

8. The adjustable pin structure according to claim 3, characterized in that: The distance between the connecting sleeve (25) and the cone sleeve (23) is set to a, and a is 0 to 1 mm.

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