Hydraulic press fitting equipment for gear shaft assembly

Abstract

This utility model discloses a hydraulic pressing device for assembling gear shafts, belonging to the field of gear shaft technology. It includes: a worktable; a U-shaped pressing plate installed on the worktable surface, with an inverted L-shaped vertical plate welded to the outer wall behind the U-shaped pressing plate; an assembly component disposed within the U-shaped pressing plate and centripetally holding a gear component; a hydraulic pressing component longitudinally installed on the inner top wall of the L-shaped vertical plate, with a shaft body pressed down at its bottom lifting end, the bottom end of the shaft body being inserted into the shaft hole of the gear component; the gear component is centripetally clamped by two symmetrically arranged arc-shaped internal gear plates on its circumference. During the pressing process of the hydraulic pressing component, the shaft body is raised and lowered for positioning by a positioning auxiliary component to prevent the shaft body from getting stuck in the shaft hole. This utility model avoids the errors caused by traditional manual adjustment, achieves precise positioning of the gear component, improves assembly efficiency, and achieves the effects of improving assembly accuracy and reducing manual labor intensity.

Description

Technical Field

[0001] This utility model belongs to the field of gear shaft technology, and in particular to hydraulic pressing equipment for gear shaft assembly. Background Technology

[0002] A gear shaft is a mechanical part that supports rotating parts and rotates with them to transmit motion, torque, or bending moment. It is generally a metal rod, with different diameters for each section. The rotating parts in a machine are mounted on the shaft. A hydraulic press-fitting machine for gear shaft assembly is an automated or semi-automatic device specifically designed to precisely and stably press the shaft into the shaft hole of a gear component. This equipment is widely used in industrial fields such as automotive manufacturing, heavy machinery, and precision transmission systems, and is one of the important tools for achieving high-precision gear shaft assembly.

[0003] In existing technologies, most equipment uses manual adjustment or simple pneumatic clamps to hold gear components. For example, using two planar jaws to clamp the outer surface of the gear from both sides, although this method is simple in structure and low in cost, has the following problems: due to the complex shape of the gear teeth, the planar jaws can only contact a part of the gear, which can easily cause uneven force at the clamping point, resulting in tilting or displacement of the gear component; the position of the jaws needs to be manually adjusted, and the adjustment error is relatively large, making it difficult to ensure that the gear component is always in the center position, thus affecting the alignment of the shaft pressing. Summary of the Invention

[0004] The purpose of this invention is to provide a hydraulic pressing device for assembling gear shafts, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic pressing device for assembling gear shafts, comprising: Workbench; A U-shaped pressing plate is installed on the workbench surface, and an inverted L-shaped vertical plate is welded to the outer wall behind the U-shaped pressing plate. The assembly components are set in a U-shaped press plate and the gear components are held in a radial clamp. The hydraulic pressing assembly is longitudinally installed on the inner top wall of the L-shaped vertical plate, and a shaft is pressed down at the bottom lifting end. The bottom end of the shaft is inserted into the shaft hole of the gear component. The gear component is held in place by two symmetrically arranged arc-shaped internal gear plates that move and mesh in a centripetal motion. During the pressing process of the hydraulic pressing assembly, the shaft is raised and lowered by a positioning auxiliary component to prevent the shaft from getting stuck in the shaft hole when pressing down.

[0006] In a preferred embodiment, the inner bottom wall of the U-shaped pressing platform is fixed with an assembly base plate, and the assembly component is installed on the assembly base plate and located in the U-shaped pressing platform.

[0007] In a preferred embodiment, the assembly components include movable support platforms symmetrically arranged on the top surface of the assembly base plate and in an inverted U-shape, arc-shaped clamping plates welded to the top surface of each movable support platform, threaded rods threaded through one end of the two movable support platforms, and positioning crossbars threaded through the other end of the two movable support platforms.

[0008] In this preferred embodiment, the threaded rod has symmetrically arranged threaded teeth with opposite thread directions on both ends of its circumference. The two threaded teeth are respectively threaded through and connected to the two movable support platforms. The smooth ends of both ends of the threaded rod are connected to the inner walls of both sides of the U-shaped press plate through sealed bearings.

[0009] In a preferred embodiment, a servo motor is installed on one side of the outer wall of the U-shaped pressing platform. The output shaft of the servo motor is connected to one end of the threaded rod. The two arc-shaped internal gear plates are welded to the inner walls of the two arc-shaped clamping plates, so that the two arc-shaped internal gear plates dynamically mesh with the gear components.

[0010] In this preferred embodiment, each of the two arc-shaped clamping plates has a bearing platform at one end opposite to support the bearing gear component, and each of the two threaded teeth has a travel limiting ring welded at one end opposite to the threaded rod, so that the travel limiting ring limits the travel of the movable support platform.

[0011] In a preferred embodiment, the hydraulic pressing assembly includes a hydraulic lifting column installed upside down on the inner top wall of the L-shaped vertical plate, a U-shaped lifting positioning frame bolted to the bottom lifting end of the hydraulic lifting column, a positioning through hole in the middle of the inner bottom wall of the U-shaped lifting positioning frame, and locking bolt knobs symmetrically threaded through and connected to both sides of the U-shaped lifting positioning frame.

[0012] In this preferred embodiment, the positioning perforation is coaxially arranged with the shaft and the shaft hole, and the top end of the shaft passes through the positioning perforation and connects to the inner bottom wall of the U-shaped lifting positioning frame.

[0013] In this preferred embodiment, the positioning auxiliary component includes two connecting plates symmetrically welded to the outer wall of the L-shaped lifting positioning frame near the L-shaped vertical plate, and U-shaped positioning slide plates respectively welded to the free ends of each connecting plate. The two U-shaped positioning slide plates are engaged with the longitudinal ends of the L-shaped vertical plate.

[0014] In a preferred embodiment, ribs are symmetrically welded at the vertical angle of the upper inner wall of the L-shaped vertical plate.

[0015] Compared with the prior art, the technical effects and advantages of this utility model are as follows: This hydraulic press-fitting device for gear shaft assembly utilizes a structural design where the assembly components are positioned within a U-shaped press-fitting platform to achieve centripetal clamping of the gear components. This design allows the gear components to be automatically positioned at the center. The movable support platform, arc-shaped clamping plate, and arc-shaped internal gear plate within the assembly components work together, combined with a servo motor driving the threaded rod to rotate. This causes the two movable support platforms on both sides to move synchronously towards the center or in opposite directions, thereby achieving dynamic meshing and clamping of the gear components. This design avoids the errors caused by traditional manual adjustments, achieves precise positioning of the gear components, improves assembly efficiency and consistency, and ultimately enhances assembly accuracy while reducing manual labor intensity.

[0016] The structural design, which involves "a hydraulic pressing assembly longitudinally installed on the inner top wall of the L-shaped vertical plate and pressing down on the shaft to insert it into the shaft hole of the gear component," allows the shaft to be smoothly inserted into the shaft hole under hydraulic drive. Using a hydraulic lifting column as the power source offers advantages such as high output pressure and precise stroke control, ensuring a reliable interference fit between the shaft and the gear component. Simultaneously, when the bottom end of the shaft is inserted into the shaft hole, its top end is coaxially limited by the positioning holes of the U-shaped lifting positioning frame, preventing jamming or damage to parts due to misalignment during pressing. This dual positioning method improves the success rate of pressing, achieving the technical effects of improving assembly quality and reducing scrap rate.

[0017] By employing a design that uses two arc-shaped internal gear plates on the circumference of the gear component for centripetal moving meshing and clamping, the gear component can be firmly fixed in the center position before press-fitting. Because the arc-shaped internal gear plates mesh with the external teeth of the gear component, compared to traditional planar clamping methods, it is more adaptable to the clamping requirements of gears with different modules, and the clamping is more uniform and conforming, avoiding damage to the tooth surface. This structure not only improves the reliability of clamping but also enhances the versatility for different types of gear components, achieving the technical effect of expanding the scope of application and improving equipment flexibility. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the assembly component and the hydraulic pressing component of this utility model; Figure 3 This is a structural schematic diagram of the assembly components of this utility model; Figure 4 This is a schematic diagram of the installation structure of the gear component of this utility model; Figure 5 This is a schematic diagram of the installation structure of the arc-shaped internal toothed plate of this utility model; Figure 6 This is a schematic diagram of the connection structure of the U-shaped lifting and positioning frame of this utility model.

[0019] Explanation of reference numerals in the attached figures: In the diagram: 1. Workbench; 2. U-shaped pressing platform; 3. L-shaped vertical plate; 4. Control box; 5. Assembly assembly; 6. Hydraulic pressing assembly; 7. Hydraulic lifting column; 8. Shaft; 9. Assembly base plate; 10. U-shaped lifting and positioning frame; 11. Moving support platform; 12. Servo motor; 13. Arc-shaped clamping plate; 14. Gear component; 15. Threaded rod component; 16. Sealed bearing; 17. Threaded tooth path; 18. Arc-shaped internal gear plate; 19. Shaft hole; 20. Bearing platform; 21. Rib plate; 22. Positioning through hole; 23. Locking bolt knob; 24. U-shaped positioning slide plate; 25. Connecting plate; 26. Positioning crossbar. Detailed Implementation

[0020] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0021] This embodiment provides, for example Figures 1 to 6 The hydraulic pressing apparatus for assembling gear shafts shown includes: a worktable 1, a U-shaped pressing plate 2, an assembly component 5, and a hydraulic pressing component 6.

[0022] The U-shaped pressing plate 2 is installed on the table surface of the workbench 1, and an inverted L-shaped vertical plate 3 is welded to the outer wall behind the U-shaped pressing plate 2.

[0023] Assembly component 5 is set in U-shaped pressing platform 2 and centripetally clamps gear component 14; hydraulic pressing component 6 is longitudinally installed on the inner top wall of L-shaped vertical plate 3 and has a shaft 8 pressed down at its bottom lifting end. The bottom end of shaft 8 is inserted into the shaft hole 19 of gear component 14. Two symmetrically arranged arc-shaped internal gear plates 18 centripetally move and mesh to clamp gear component 14. During the pressing process of hydraulic pressing component 6, the shaft 8 is raised and lowered and positioned by positioning auxiliary components to prevent shaft 8 from getting stuck in shaft hole 19 when pressing down. This prevents the shaft 8 and shaft hole 19 from shifting their axial center during pressing down, thus preventing interference fit between shaft 8 and shaft hole 19.

[0024] In this embodiment, an assembly base plate 9 is fixed to the inner bottom wall of the U-shaped pressing platform 2, and the assembly component 5 is installed on the assembly base plate 9 and located in the U-shaped pressing platform 2.

[0025] In this embodiment, the assembly component 5 includes movable support platforms 11 symmetrically arranged on the top surface of the assembly base plate 9 and in the shape of an inverted U, arc-shaped clamping plates 13 respectively welded to the top surface of each movable support platform 11, threaded rods 15 threaded through one end of the two movable support platforms 11, and positioning crossbars 26 respectively through the other end of the two movable support platforms 11.

[0026] In this embodiment, the two ends of the threaded rod 15 are symmetrically provided with threaded passages 17 in opposite directions on their circumferences. The two threaded passages 17 are respectively threaded through and connected to the two movable support platforms 11. The smooth ends of the threaded rod 15 are connected to the inner walls of both sides of the U-shaped press plate 2 through sealed bearings 16. Both sealed bearings 16 are embedded in the inner wall of the U-shaped press plate 2.

[0027] In this embodiment, a servo motor 12 is installed on one side of the outer wall of the U-shaped pressing platform 2. The output shaft of the servo motor 12 is connected to one end of the threaded rod 15. Two arc-shaped internal gear plates 18 are welded to the inner walls of two arc-shaped clamping plates 13 respectively, so that the two arc-shaped internal gear plates 18 and the gear 14 are dynamically meshed. Servo motor 12 drives threaded rod 15 to rotate. With the design of two threaded tooth paths 17 with opposite thread directions, the two threaded tooth paths 17 of threaded rod 15 drive two movable support platforms 11 to move inward or outward. When servo motor 12 runs in the forward direction and drives threaded rod 15 to rotate in the forward direction, the two movable support platforms 11 move inward, thereby causing two arc-shaped clamping plates 13 to drive two arc-shaped internal tooth plates 18 to clamp gear 14 inward, thereby meshing and clamping with gear 14, so that gear 14 is clamped in the center position on bearing platform 20, which helps the assembly of shaft 8. The positioning crossbar 26 can position the movement of the two movable support platforms 11, thereby enabling the movable support platforms 11 to be positioned and moved.

[0028] In this embodiment, each of the two arc-shaped clamping plates 13 has a bearing platform 20 at one end for supporting the bearing gear 14, and each of the two threaded teeth 17 has a stroke limiting ring welded at one end and on the periphery of the threaded rod 15, so that the stroke limiting ring limits the stroke of the movable support platform 11.

[0029] In this embodiment, the hydraulic pressing assembly 6 includes a hydraulic lifting column 7 installed upside down on the inner top wall of the L-shaped vertical plate 3, a U-shaped lifting positioning frame 10 installed at the bottom lifting end of the hydraulic lifting column 7 by bolts, a positioning through hole 22 opened in the middle of the inner bottom wall of the U-shaped lifting positioning frame 10, and locking bolt knobs 23 that are symmetrically threaded and connected to both sides of the U-shaped lifting positioning frame 10.

[0030] In this embodiment, the positioning through hole 22 is coaxially arranged with the shaft body 8 and the shaft hole 19. The top end of the shaft body 8 passes through the positioning through hole 22 and is connected to the inner bottom wall of the U-shaped lifting positioning frame 10, so that the hydraulic lifting column 7 presses down on the U-shaped lifting positioning frame 10, and the U-shaped lifting positioning frame 10 presses down on the shaft body 8. The positioning through hole 22 is used for longitudinal positioning of the shaft body 8. The screw ends of the two locking bolt knobs 23 are screwed into the U-shaped lifting positioning frame 10 and are centripetally clamped on the peripheral outer wall of the shaft body 8.

[0031] In this embodiment, the positioning auxiliary component includes two connecting plates 25 symmetrically welded to the outer wall of the U-shaped lifting positioning frame 10 near the L-shaped vertical plate 3, and U-shaped positioning slide plates 24 respectively welded to the free ends of each connecting plate 25. The two U-shaped positioning slide plates 24 are engaged with the longitudinal ends of the L-shaped vertical plate 3, so that when the U-shaped lifting positioning frame 10 is raised or lowered, the connecting plates 25 drive the U-shaped positioning slide plates 24 to slide and rise longitudinally on the longitudinal plate of the L-shaped vertical plate 3, so that the inner wall of the U-shaped positioning slide plate 24 slides and rubs against the outer wall of the L-shaped vertical plate 3, thereby achieving longitudinal positioning of the raising and lowering of the U-shaped lifting positioning frame 10 and the longitudinal direction of the pressing shaft 8. Through the "setting of the positioning auxiliary component", that is, the guide structure formed by the connecting plates 25 and the U-shaped positioning slide plates 24, the U-shaped lifting positioning frame 10 always maintains a vertical movement trajectory during the raising and lowering process. The U-shaped positioning slide plates 24 are engaged with the longitudinal guide rail of the L-shaped vertical plate 3, and form sliding friction contact with the outer wall of the L-shaped vertical plate 3 during the pressing process, playing a guiding and anti-shaking role. This design effectively prevents shaft tilting or uneven pressing caused by frame sway during hydraulic pressing, further improving the stability and safety of the pressing process, and achieving the technical effects of extending equipment service life and ensuring assembly quality.

[0032] In this embodiment, ribs 21 are symmetrically welded at the vertical angle of the upper inner wall of the L-shaped vertical plate 3. A control box 4 is located at the lower part of the workbench 1, and the control box 4 contains a PLC control system for controlling the opening and closing of the servo motor 12 and the hydraulic lifting column 7.

[0033] Working principle The hydraulic press fitting for assembling the gear shaft places the gear component 14 to be assembled on the bearing platform 20 between two arc-shaped clamping plates 13. At this time, the gear component 14 is not clamped. The PLC controls the servo motor 12 to start running, driving the threaded rod 15 to rotate. Since the threaded rod 15 has threaded teeth 17 with opposite directions at both ends, when it rotates, it drives the movable support platform 11 on both sides to move towards the center. The movable support platform 11 drives the arc-shaped clamping plate 13 to move synchronously, thereby causing the arc-shaped internal gear plate 18 welded on it to clamp the gear component 14 towards the center.

[0034] The arc-shaped internal toothed plate 18 meshes with the external teeth of the gear component 14, so that it is precisely positioned at the center of the U-shaped press plate 2. The positioning crossbar 26 passes through the movable support platform 11, which plays a guiding and limiting role to prevent deviation. The threaded rod 15 is provided with stroke limit rings at both ends to limit the maximum stroke of the movable support platform 11.

[0035] The shaft 8 is vertically inserted into the positioning hole 22 in the middle of the U-shaped lifting and positioning frame 10, with its bottom end close to the shaft hole 19 of the gear component 14. The positioning hole 22 and the shaft hole 19 are coaxially designed to ensure that the shaft 8 is initially aligned before pressing. By rotating the locking bolt knobs 23 on both sides, the screw end is made to clamp the shaft 8 around its periphery, and it is firmly fixed in the U-shaped lifting and positioning frame 10 to prevent displacement during the pressing process. The PLC controls the start of the hydraulic lifting column 7, and its bottom lifting end drives the U-shaped lifting and positioning frame 10 to move downward. The U-shaped lifting and positioning frame 10 drives the shaft 8 to press downward into the shaft hole 19 of the gear component 14. During this process, the shaft 8 always maintains longitudinal alignment through the positioning hole 22 to avoid skewing.

[0036] The U-shaped lifting and positioning frame 10 has connecting plates 25 welded on both sides, and its ends are connected to U-shaped positioning slide plates 24. The U-shaped positioning slide plates 24 are snapped onto the longitudinal guide rail of the L-shaped vertical plate 3 and slide vertically along the L-shaped vertical plate 3 when the hydraulic lifting column 7 is pushed. This structure effectively prevents the U-shaped lifting and positioning frame 10 from swaying laterally during the lifting process, thereby improving the straightness and accuracy of the shaft 8 pressing. When the shaft 8 is seen to be fully pressed into the shaft hole 19, the hydraulic lifting column 7 stops pressing down. The PLC controls the reverse-running servo motor 12 to reverse the threaded rod 15, causing the movable support platform 11 to move in opposite directions, releasing the clamping of the gear component 14 by the arc-shaped internal gear plate 18, loosening the locking bolt knob 23, removing the gear shaft assembly that has been press-fitted, and the hydraulic lifting column 7 drives the U-shaped lifting positioning frame 10 to rise back to the initial position, and the movable support platform 11 resets, ready for the next round of assembly operations.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic press-fitting device for assembling gear shafts, characterized in that, include: Workbench (1); U-shaped pressing plate (2) is installed on the table surface of the workbench (1). An inverted L-shaped vertical plate (3) is welded to the outer wall behind the U-shaped pressing plate (2). Assembly component (5) is set in U-shaped press plate (2) and the gear component (14) is held in a radial clamp. The hydraulic pressing assembly (6) is longitudinally installed on the inner top wall of the L-shaped plate (3) and the bottom lifting end is pressed down with a shaft (8). The bottom end of the shaft (8) is inserted into the shaft hole (19) of the gear component (14). The gear component (14) is held in a centripetal motion by two symmetrically arranged arc-shaped internal gear plates (18). During the process of the hydraulic pressing assembly (6) pressing down the shaft (8), the positioning auxiliary component is used for lifting and positioning to prevent the shaft (8) from getting stuck in the shaft hole (19) when pressing down the shaft (8).

2. The hydraulic pressing device for assembling gear shafts according to claim 1, characterized in that: The inner bottom wall of the U-shaped pressing platform (2) is fixed with an assembly base plate (9), and the assembly component (5) is installed on the assembly base plate (9) and located in the U-shaped pressing platform (2).

3. The hydraulic press-fitting device for gear shaft assembly according to claim 2, characterized in that: The assembly component (5) includes a movable support platform (11) symmetrically arranged on the top surface of the assembly base plate (9) and in an inverted U-shape, an arc-shaped clamping plate (13) welded to the top surface of each movable support platform (11), a threaded rod (15) threaded through one end of the two movable support platforms (11), and a positioning crossbar (26) threaded through the other end of the two movable support platforms (11).

4. The hydraulic press-fitting device for gear shaft assembly according to claim 3, characterized in that: The threaded rod (15) has symmetrically opened threaded teeth (17) with opposite thread directions on both ends of its circumference. The two threaded teeth (17) are respectively threaded through and connected to the two movable support platforms (11). The smooth rod ends of both ends of the threaded rod (15) are connected to the inner walls of both sides of the U-shaped press plate (2) through sealed bearings (16).

5. The hydraulic press-fitting device for gear shaft assembly according to claim 4, characterized in that: A servo motor (12) is installed on one side of the outer wall of the U-shaped pressing platform (2). The output shaft of the servo motor (12) is connected to one end of the threaded rod (15). The two arc-shaped internal gear plates (18) are welded to the inner walls of the two arc-shaped clamping plates (13) respectively, so that the two arc-shaped internal gear plates (18) and the gear (14) are dynamically meshed.

6. The hydraulic press-fitting device for gear shaft assembly according to claim 5, characterized in that: Each of the two arc-shaped clamping plates (13) has a bearing platform (20) for supporting the bearing gear (14) at one end. Each of the two threaded teeth (17) has a stroke limiting ring welded at one end and on the periphery of the threaded rod (15), so that the stroke limiting ring limits the stroke of the movable support platform (11).

7. The hydraulic press-fitting device for gear shaft assembly according to claim 6, characterized in that: The hydraulic press assembly (6) includes a hydraulic lifting column (7) installed upside down on the inner top wall of the L-shaped plate (3), a U-shaped lifting positioning frame (10) installed at the bottom lifting end of the hydraulic lifting column (7) by bolts, a positioning through hole (22) opened in the middle of the inner bottom wall of the U-shaped lifting positioning frame (10), and locking bolt knobs (23) symmetrically threaded through and connected to both sides of the U-shaped lifting positioning frame (10).

8. The hydraulic press-fitting device for gear shaft assembly according to claim 7, characterized in that: The positioning hole (22) is coaxially arranged with the shaft (8) and the shaft hole (19). The top end of the shaft (8) passes through the positioning hole (22) and connects to the inner bottom wall of the U-shaped lifting positioning frame (10).

9. The hydraulic press-fitting device for gear shaft assembly according to claim 8, characterized in that: The positioning auxiliary component includes two connecting plates (25) symmetrically welded to the outer wall of the L-shaped lifting positioning frame (10) near the L-shaped vertical plate (3) and U-shaped positioning slide plates (24) respectively welded to the free end of each connecting plate (25). The two U-shaped positioning slide plates (24) are snapped onto the longitudinal ends of the L-shaped vertical plate (3).

10. The hydraulic press-fitting device for gear shaft assembly according to claim 1, characterized in that: Ribs (21) are symmetrically welded at the vertical angle of the upper inner wall of the L-shaped plate (3).

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