A new type of pressing head structure of a special pressing equipment

Abstract

The utility model discloses a novel pressure head structure of special press equipment belongs to press equipment technical field, including upper transverse board, lower transverse board, three guide posts, floating pressure head body, self -lubricating guide bush and quick -change joint, the upper transverse board is rectangular steel sheet, and the top surface center is processed with threaded hole, is equipped with through -hole still, the lower transverse board is rectangular steel sheet with the upper transverse board, is equipped with threaded blind hole, and the center is provided with ladder hole, the guide post is equipped with 3 and is in equilateral triangle distribution, and the end is through the outer thread and is screwed into the upper transverse board through -hole, and the lower end is through the interference fit and is pressed into the lower transverse board threaded blind hole, the floating pressure head body includes the cylindrical pressure -bearing part and the guide portion of integrated mould, and the junction forms annular step surface, and the guide portion outer surface sets up two annular lubricating grooves, the self -lubricating guide bush is two copper base graphite bushings, and is pressed into the upper and lower segments in the lower transverse board ladder hole, and the inner wall is in clearance fit with floating pressure head guide portion.

Description

Technical Field

[0001] This utility model belongs to the field of press-fitting equipment technology, and specifically relates to a novel press head structure for a special press-fitting equipment. Background Technology

[0002] In modern machining and assembly, press fitting is a crucial step in the production of many mechanical products, especially for the assembly of interference-fit parts such as bearings, bushings, and gears. The performance and precision of press fitting equipment directly affect the quality and lifespan of the entire machine. Traditional press fitting equipment generally uses a rigid press head structure, which has the following main problems:

[0003] 1. There is no floating compensation when the pressure head contacts the workpiece, which can easily lead to uneven pressing force due to the parallelism error of the workpiece end face, damaging the parts;

[0004] 2. Changing the pressure head requires disassembling multiple guide rods and fasteners, which takes a long time and affects the production line cycle time.

[0005] Therefore, a new type of pressure head is needed that is simple in structure, reliable in floating, and quick in changing. Summary of the Invention

[0006] To address the aforementioned problems, this utility model discloses a novel pressure head structure for a dedicated pressing equipment. By using three guide columns arranged in a triangle and in conjunction with a disc spring assembly, the floating pressure head body can automatically compensate for minor errors in the workpiece, avoid local overload, and reduce the indentation defect rate on the workpiece surface.

[0007] To achieve the above objectives, the specific technical solution of this application is as follows:

[0008] A novel press head structure for a special press fitting equipment includes an upper horizontal plate, a lower horizontal plate, three guide columns, a floating press head body, a self-lubricating guide sleeve, and a quick-change connector.

[0009] The upper horizontal plate is a rectangular steel plate with a threaded hole machined in the center of its top surface and a through hole.

[0010] The lower horizontal plate is a rectangular steel plate of the same size as the upper horizontal plate, with threaded blind holes and a stepped hole in the center.

[0011] The guide post is provided with 3 posts arranged in an equilateral triangle. The end is screwed into the through hole of the upper horizontal plate through external thread, and the lower end is pressed into the threaded blind hole of the lower horizontal plate through interference fit.

[0012] The floating pressure head body includes an integrally formed pressure-bearing part and a guide part, with an annular stepped surface formed at the junction, and at least two annular lubrication grooves opened on the outer surface of the guide part.

[0013] The self-lubricating guide sleeve consists of two copper-based graphite bushings, which are press-fitted into the upper and lower sections of the stepped hole of the lower horizontal plate, and the inner wall is clearance-fitted with the guide part of the floating pressure head.

[0014] The quick-connector includes a connecting rod and a tapered sleeve. The upper section of the connecting rod is an externally threaded post that screws into the threaded hole of the upper horizontal plate, and the lower section is a Morse taper shank. The inner tapered surface of the tapered sleeve matches the tapered shank of the connecting rod, and the top flange is fixed to the top surface of the pressure bearing part of the floating pressure head by bolts.

[0015] Based on the above technical features, specifically, each of the three guide columns is fitted with a set of disc springs, and each set of disc springs is composed of no less than 5 stacked disc springs; the upper end of the disc spring set abuts against the bottom surface of the upper horizontal plate, and the lower end abuts against the top surface of the lower horizontal plate.

[0016] Based on the above technical features, preferably, the outer side of the disc spring assembly is fitted with a dustproof corrugated tube, and the two ends of the corrugated tube are respectively snapped into the annular grooves of the upper and lower horizontal plates to prevent dust from entering the gaps of the disc spring assembly.

[0017] Based on the above technical features, furthermore, an annular support surface is formed at the change in diameter of the stepped hole in the lower horizontal plate, and the upper end face of the self-lubricating guide sleeve abuts against the annular support surface.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] This application uses three guide pillars arranged in a triangle, in conjunction with a disc spring assembly, to enable the floating pressure head body to automatically compensate for minor errors in the workpiece, avoid local overload, and reduce the surface indentation defect rate of the workpiece.

[0020] The quick-change coupling that matches the Morse taper shank and taper sleeve reduces the pressure head replacement time to less than 1 minute, significantly improving production efficiency and adapting to the needs of multi-variety production.

[0021] The pre-compressed disc spring assembly provides a stable elastic restoring force, is smaller and more rigid than traditional springs, and the dustproof bellows effectively extend its service life. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a novel pressure head for a special pressing device according to this utility model;

[0023] Figure 2 This is a top view of the horizontal structure of this utility model;

[0024] List of identifiers in attached diagrams:

[0025] 1. Upper horizontal plate; 1a. Threaded hole; 1b. Through hole; 2. Lower horizontal plate; 2a. Threaded blind hole; 2b. Stepped hole; 2c. Annular support surface; 3. Guide column; 4. Floating pressure head body; 4a. Pressure bearing part; 4b. Guide part; 4c. Annular stepped surface; 4d. Annular lubrication groove; 5. Self-lubricating guide sleeve; 6. Quick-change connector; 6a. Connecting rod; 6b. Tapered sleeve; 6c. Top flange; 6d. Socket head bolt; 7. Disc spring assembly; 7a. Bellows. Detailed Implementation

[0026] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0027] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 1 As shown, a novel press head structure for a special press fitting equipment includes an upper horizontal plate 1, a lower horizontal plate 2, three guide columns 3, a floating press head body 4, a self-lubricating guide sleeve 5, and a quick-change connector 6.

[0029] The upper horizontal plate 1 is a rectangular steel plate with a threaded hole 1a machined at the center of its top surface, and also has a through hole 1b.

[0030] The lower horizontal plate 2 is a rectangular steel plate of the same size as the upper horizontal plate, and is provided with a threaded blind hole 2a and a stepped hole 2b in the center.

[0031] The guide post 3 has 3 posts arranged in an equilateral triangle. The end is screwed into the through hole 1b of the upper horizontal plate through external thread, and the lower end is pressed into the threaded blind hole 2a of the lower horizontal plate through interference fit.

[0032] The floating pressure head body 4 is composed of an integrally formed cylindrical pressure-bearing part 4a and a guide part 4b, with an annular stepped surface 4c formed at the junction, and two annular lubrication grooves 4d opened on the outer surface of the guide part.

[0033] The self-lubricating guide sleeve 5 consists of two copper-based graphite bushings, which are press-fitted into the upper and lower sections of the stepped hole 2b in the lower horizontal plate, and the inner wall is clearance-fitted with the floating pressure head guide part 4b.

[0034] The quick-connect coupling 6 includes a connecting rod 6a and a tapered sleeve 6b. The upper section of the connecting rod is an externally threaded post that screws into the threaded hole 1a of the upper horizontal plate, and the lower section is a Morse taper shank. The inner tapered surface of the tapered sleeve 6b matches the tapered shank of the connecting rod. The top flange 6c is fixed to the top surface of the pressure-bearing part 4a of the floating pressure head by bolts 6d. The quick-connect coupling 6 and the lower horizontal plate 2 are dynamically coupled through the floating pressure head 4, but there is no physical connection between them.

[0035] Each of the three guide columns 3 is fitted with a set of disc springs 7, each set of disc springs 7 consisting of no less than 5 stacked disc springs; the upper end of the disc springs 7 abuts against the bottom surface of the upper horizontal plate 1, and the lower end abuts against the top surface of the lower horizontal plate 2, with a pre-compression amount of 15-25% of the total height.

[0036] The outer side of the disc spring assembly 7 is fitted with a dustproof corrugated tube 7a, with both ends of the corrugated tube respectively snapped into the annular grooves of the upper horizontal plate 1 and the lower horizontal plate 2 to prevent dust from entering the spring gap.

[0037] An annular support surface 2c is formed at the change in diameter of the stepped hole 2b in the lower horizontal plate, and the upper end face of the self-lubricating guide sleeve 5 abuts against the annular support surface 2c.

[0038] The quick-connect coupling 6 has four bolt holes evenly distributed on the tapered sleeve 6b flange 6c, which are threaded to the top surface of the floating pressure head bearing part 4a by four internal hex bolts 6d.

[0039] The diameter of the annular stepped surface 4c of the floating pressure head body 4 is larger than the lower end diameter of the stepped hole 2b of the lower horizontal plate, forming an axial limiting structure.

[0040] The self-lubricating guide sleeve 5 has micropores on its inner wall, and the micropores are distributed in a spiral array. Preferably, the micropores of the self-lubricating guide sleeve 5 are filled with a molybdenum disulfide-graphite composite solid lubricant, and the micropore diameter is 0.1-0.3 mm with a porosity of 15-20%.

[0041] Workflow:

[0042] In the initial state, the disc spring assembly 7 is in pre-compression, and the annular step surface 4c of the floating pressure head body 4 maintains a set gap with the lower end surface of the lower horizontal plate 2;

[0043] During press-fitting, the hydraulic cylinder pushes the upper horizontal plate 1 downwards, and the floating press head body 4 first contacts the workpiece. If the workpiece end face is tilted, the workpiece end face error forces the floating press head body 4 to move slightly along the guide sleeve 5. The disc spring assembly 7 generates elastic deformation corresponding to the tilt error, maintaining a constant press-fitting force and achieving floating compensation. The press-fitting force is transmitted through the Morse taper surface of the quick-connect coupling 6 to ensure coaxiality. After press-fitting is completed, the disc spring assembly 7 resets, and the floating press head body returns to its initial position.

[0044] When replacing the pressure head, loosen the four hex socket bolts 6d, separate the tapered sleeve 6b from the connecting rod 6a, and then pull out the floating pressure head body 4 as a whole. After inserting the new pressure head, tighten the locking bolts to complete the replacement.

[0045] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A novel pressure head structure for a dedicated pressing equipment, characterized in that: It includes an upper horizontal plate (1), a lower horizontal plate (2), three guide pillars (3), a floating pressure head body (4), a self-lubricating guide sleeve (5), and a quick-change connector (6); The upper horizontal plate (1) is a rectangular steel plate with a threaded hole (1a) machined at the center of its top surface and a through hole (1b). The lower horizontal plate (2) is a rectangular steel plate of the same size as the upper horizontal plate, with a threaded blind hole (2a) and a stepped hole (2b) in the center. The guide post (3) has 3 posts arranged in an equilateral triangle. The end is screwed into the through hole (1b) of the upper horizontal plate through external thread, and the lower end is pressed into the threaded blind hole (2a) of the lower horizontal plate through interference fit. The floating pressure head body (4) includes an integrally formed cylindrical pressure-bearing part (4a) and a guide part (4b), with an annular stepped surface (4c) formed at the junction, and two annular lubrication grooves (4d) opened on the outer surface of the guide part. The self-lubricating guide sleeve (5) consists of two copper-based graphite bushings, which are press-fitted into the upper and lower sections of the stepped hole (2b) of the lower horizontal plate, and the inner wall is clearance-fitted with the floating pressure head guide part (4b). The quick-connector (6) includes a connecting rod (6a) and a tapered sleeve (6b). The upper section of the connecting rod is an externally threaded post that screws into the threaded hole (1a) of the upper horizontal plate, and the lower section is a Morse taper shank. The inner tapered surface of the tapered sleeve (6b) matches the tapered shank of the connecting rod, and the top flange (6c) is fixed to the top surface of the floating pressure head bearing part (4a) by bolts (6d).

2. The novel press head structure of a special press fitting equipment according to claim 1, characterized in that: Each of the three guide columns (3) is fitted with a set of disc springs (7), each set of disc springs (7) is composed of no less than 5 stacked disc springs; the upper end of the disc springs (7) abuts against the bottom surface of the upper horizontal plate (1), and the lower end abuts against the top surface of the lower horizontal plate (2).

3. The novel pressure head structure of a special pressing equipment according to claim 2, characterized in that: The outer side of the disc spring assembly (7) is fitted with a dustproof corrugated tube (7a), and the two ends of the corrugated tube are respectively engaged in the annular grooves of the upper horizontal plate (1) and the lower horizontal plate (2) to prevent dust from entering the spring gap.

4. The novel pressure head structure of a special pressing equipment according to claim 1, characterized in that: An annular support surface (2c) is formed at the change in diameter of the stepped hole (2b) of the lower horizontal plate, and the upper end face of the self-lubricating guide sleeve (5) abuts against the annular support surface (2c).

5. The novel pressure head structure of a special pressing equipment according to claim 1, characterized in that: The quick-connect coupling (6) has four bolt holes evenly distributed on the tapered sleeve (6b) flange (6c), which are threaded to the top surface of the floating pressure head bearing part (4a) by four internal hex bolts (6d).

6. The novel pressure head structure of a special pressing equipment according to claim 1, characterized in that: The diameter of the annular stepped surface (4c) of the floating pressure head body (4) is larger than the lower end hole diameter of the stepped hole (2b) of the lower horizontal plate, forming an axial limiting structure.

7. The novel pressure head structure of a special pressing equipment according to claim 1, characterized in that: The self-lubricating guide sleeve (5) has micropores on its inner wall, and the micropores are distributed in a spiral array.

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