Reciprocating press-fitting device for preventing rubber bushing from rebounding

Abstract

The utility model provides a reciprocating press-fitting device for preventing rubber bushings from rebounding, and relates to the technical field of reciprocating press-fitting of the rubber bushings, the reciprocating press-fitting device comprises a machine body, a first servo press and a second servo press, a top plate is fixed at the upper end of the machine body, the first servo press is installed on the front side of the left portion of the top plate, a notch is formed in the middle of the top plate, and the second servo press is installed on the top plate. A concave opening is formed in the machine body, a second servo press is installed in the concave opening, a top frame is fixed to the lower portion of the second servo press, a rear panel is fixed to the rear end of the top frame, a pressing table structure is installed in the middle of the rear side wall in the machine body, a base is fixed to the lower end of the machine body, and a first jacking air cylinder is installed on the front side of the left portion of the bottom face of the base. The back-jacking mechanism is additionally arranged at the bottom, the top pressing head and the bottom back-jacking mechanism can alternately move in a reciprocating mode, the problems of rebounding and flanging of the lining can be solved, and therefore the size stability of the lining after press fitting is guaranteed, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of reciprocating press-fitting technology for rubber bushings, and specifically to a reciprocating press-fitting device for preventing rubber bushings from springing back. Background Technology

[0002] With the rapid development of the automotive industry, a dazzling array of car brands have emerged, each manufacturer offering a diverse and appealing range of selling points. Customers' demands for automobiles are also increasing, especially with the elimination of engines in new energy vehicles, leading to a greater appreciation for their quiet and comfortable interiors. Therefore, NVH (Noise, Vibration, and Harshness) standards have reached unprecedented levels. Various automotive and component manufacturers are exploring different solutions to better reduce NVH. Using flexible rubber contacts in component assembly has become a preferred approach, aiming to buffer and reduce noise. Rubber bushings are most widely used in automotive steering systems, chassis mounting systems, and transmission points. However, after press-fitting, rubber bushings experience springback due to the plastic deformation of the rubber, leading to dimensional instability and even instances of bushing detachment. Single-pressed rubber bushings have limiting rings; shallow press-fitting may result in the limiting ring not being fully exposed, while deep press-fitting can cause dimensional deviations. Therefore, the dimensional instability caused by rubber bushing springback and the incomplete flange of the rubber limiting ring have become significant challenges. In such a competitive environment, excellence translates to more orders and better development. Therefore, better solutions and control methods are needed to address the bushing rebound and flange issues to meet the assembly requirements of automotive parts. This necessitates the design of a press-fitting mechanism to solve this problem.

[0003] The specification of a rubber bushing pressing device and pressing process in the prior art (publication number CN103056643A) mentions that it "includes a pressing component for placing a metal mandrel, the pressing component is connected to a guide sleeve with a pressing channel, and a pressing rod is provided in the guide sleeve for pressing the outer rubber layer into the metal mandrel, and the inner end of the pressing rod is provided with a pressing head adapted to the diameter of the pressing channel". However, the bushing pressing device in the prior art has problems with unstable bushing springback and incomplete flange. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, a reciprocating pressing device for preventing rubber bushings from springing back is provided to solve the problems of unstable bushing springback dimensions and incomplete flanging in the existing bushing pressing devices.

[0005] To achieve the above objectives, a reciprocating pressing device for preventing rubber bushing rebound is provided, comprising a machine body, a first servo press, and a second servo press. A top plate is fixed to the upper end of the machine body, and the first servo press is installed on the left front side of the top plate. A notch is opened in the middle of the top plate, and the second servo press is installed in the notch. A top frame is fixed to the lower part of the second servo press, and a rear panel is fixed to the rear end of the top frame. A pressing platform structure is installed in the middle of the rear side wall of the machine body, and a base is fixed to the lower end of the machine body. A first lifting cylinder is installed on the left front side of the bottom surface of the base, and a second lifting cylinder is installed in the middle of the bottom surface of the base. A set of lower push rods is installed at the upper end of both the second lifting cylinder and the first lifting cylinder.

[0006] Furthermore, side fixing plates are fixed to both the left and right ends of the top plate, the lower end of the side fixing plates is fixed to the base, and a first Z-axis linear guide is provided on the inner side wall of the left side fixing plate.

[0007] Furthermore, a first shaft core sleeve is installed on the front left side of the upper end face of the base, and a second shaft core sleeve is installed in the middle of the upper end face of the base, and the first shaft core sleeve and the second shaft core sleeve have the same structural configuration.

[0008] Furthermore, a clamping cylinder is installed on the rear side of the middle part of the machine body, and a middle panel is installed on the front side of the middle part of the upper end face of the base, and a protrusion is installed in the center of the middle panel.

[0009] Furthermore, the lower end of the first servo press is provided with a first pressure head, and a set of rubber bushings are fitted on the first pressure head. The first pressure head and the first shaft core sleeve are aligned vertically. The lower rod of the first servo press passes through the side lifting platform. The left end of the side lifting platform is provided with a first slider, which is slidably connected to the first Z-axis linear guide rail.

[0010] Furthermore, a second Z-axis linear guide is provided on the front side of the rear panel, and a middle lifting platform slides on the second Z-axis linear guide. A second pressure head is provided at the lower end of the second servo press. A set of rubber bushings is fitted on the second pressure head, and the lower rod of the second pressure head passes through the middle lifting platform. The second pressure head and the second shaft core sleeve are aligned vertically.

[0011] Furthermore, the left and right sides of the pressure table structure are provided with side connecting plates. A rear support plate is fixed to the rear of the upper end face of the side connecting plate, and a groove is fixed to the front end of the rear support plate. A middle pad is placed between the rear of the two sets of side connecting plates, and another set of grooves is installed on the middle pad.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The first Z-axis linear guide, the first slider, and the side lifting platform in this utility model are designed to ensure the stable and accurate positioning of the product when the first press head presses down. This allows the first servo press to drive the first press head to press the product into the first shaft core sleeve quickly, accurately, efficiently, and conveniently. Moreover, the reciprocating pressing causes the rubber bushing to move, which can better release the rebound force of the rubber, resulting in more stable rubber dimensions after pressing.

[0014] 2. In this utility model, the first pressure head and the first shaft core sleeve, and the second pressure head and the second shaft core sleeve are vertically aligned and reciprocally press the rubber bushing. After pressing, the complete product can be ejected by the lower push rod driven by the first lifting cylinder and the second lifting cylinder respectively. This can ensure the flange of the bushing and the depth of the bushing after pressing, making unloading faster and more convenient, and helping to improve the overall work efficiency.

[0015] 3. The product is highly versatile; by changing the cylinder and pressure head, it can be adapted to various bushing pressing environments.

[0016] 4. This utility model adds a bottom return mechanism, which can realize the alternating reciprocating motion of the top pressing head and the bottom return mechanism. It can also improve the problems of bushing springback and flanging, thereby ensuring the dimensional stability of the bushing after pressing and improving the quality of the product. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a top view schematic diagram of an embodiment of the present utility model;

[0019] Figure 3 This is a bottom view of an embodiment of the present utility model;

[0020] Figure 4 This is a top view of the pressure table structure according to an embodiment of the present invention.

[0021] In the diagram: 1. Machine body; 10. Top plate; 11. Recess; 12. First Z-axis linear guide rail; 13. Pressing cylinder; 14. Side fixing plate; 15. Base; 16. Second lifting cylinder; 17. Middle panel; 18. Protrusion; 19. First shaft core sleeve; 100. Lower push rod; 101. First lifting cylinder; 102. Second shaft core sleeve; 2. First servo press; 20. Side lifting platform; 21. First press head; 22. First slider; 3. Second servo press; 30. Top frame; 31. Rear panel; 32. Middle lifting platform; 33. Second Z-axis linear guide rail; 34. Second press head; 4. Pressing platform structure; 40. Side connecting plate; 41. Groove; 42. Rear support plate; 43. Middle pad plate. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Specific details such as particular system structures and technologies are provided to facilitate a more thorough understanding of the embodiments of this utility model. The described embodiments are some, but not all, of the embodiments disclosed herein. However, those skilled in the art should understand that the present utility model can also be implemented in other embodiments without these specific details. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0023] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] Figure 1 This is a front view schematic diagram of an embodiment of the present utility model. Figure 2 This is a top view schematic diagram of an embodiment of the present utility model. Figure 3 This is a bottom view diagram of an embodiment of the present utility model and Figure 4 This is a top view of the pressure table structure according to an embodiment of the present invention.

[0025] Reference Figures 1 to 4 As shown, this utility model provides a reciprocating pressing device for preventing rubber bushings from springing back, including a body 1, a first servo press 2, and a second servo press 3. A top plate 10 is fixed to the upper end of the body 1, and the first servo press 2 is installed on the left front side of the top plate 10. A notch 11 is opened in the middle of the top plate 10, and the second servo press 3 is installed in the notch 11. A top frame 30 is fixed to the lower part of the second servo press 3, and a rear panel 31 is fixed to the rear end of the top frame 30. A pressing platform structure 4 is installed in the middle of the inner rear side wall of the body 1, and a base 15 is fixed to the lower end of the body 1. A first lifting cylinder 101 is installed on the left front side of the bottom surface of the base 15, and a second lifting cylinder 16 is installed in the middle of the bottom surface of the base 15. A set of lower lifting rods 100 are installed on the upper ends of both the second lifting cylinder 16 and the first lifting cylinder 101.

[0026] In this embodiment, side fixing plates 14 are fixed at both ends of the top plate 10. The lower end of the side fixing plate 14 is fixed on the base 15, and a first Z-axis linear guide rail 12 is provided on the inner side wall of the left side fixing plate 14. A first pressure head 21 is provided at the lower end of the first servo press 2, and a set of rubber bushings is fitted on the first pressure head 21. The first pressure head 21 is vertically aligned with the first shaft core sleeve 19, and the lower rod of the first servo press 2 passes through the side lifting platform 20. A first slider 22 is provided at the left end of the side lifting platform 20, and the first slider 22 is slidably connected to the first Z-axis linear guide rail 12.

[0027] As a preferred embodiment, the first Z-axis linear guide 12, the first slider 22, and the side lifting platform 20 in this utility model are designed to ensure the stable and accurate positioning of the product when the first press head 21 presses it down. This allows the first servo press 2 to drive the first press head 21 to press the product into the first shaft core sleeve 19 quickly, accurately, efficiently, and conveniently. Moreover, the reciprocating pressing causes the rubber bushing to move, thereby better releasing the rubber's rebound force and making the rubber dimensions more stable after pressing.

[0028] In this embodiment, a first shaft core sleeve 19 is installed on the front left side of the upper end face of the base 15, and a second shaft core sleeve 102 is installed in the middle of the upper end face of the base 15. The first shaft core sleeve 19 and the second shaft core sleeve 102 have the same structure. A pressing cylinder 13 is installed on the rear side of the middle of the machine body 1. A middle panel 17 is installed on the front side of the middle of the upper end face of the base 15, and a protrusion 18 is installed at the center of the middle panel 17. A second Z-axis linear guide rail 33 is provided on the front side of the rear panel 31. A middle lifting platform 32 is slidably mounted on the second Z-axis linear guide rail 33. A second pressing head 34 is provided at the lower end of the second servo press 3. A set of rubber bushings is fitted on the second pressing head 34. The lower rod of the second pressing head 34 passes through the middle lifting platform 32. The second pressing head 34 and the second shaft core sleeve 102 are aligned vertically.

[0029] In a preferred embodiment, the first pressing head 21 and the first shaft core sleeve 19, and the second pressing head 34 and the second shaft core sleeve 102 are vertically aligned and reciprocally press the rubber bushing. After pressing, the complete product can be ejected by the lower push rod 100 driven by the first lifting cylinder 101 and the second lifting cylinder 16, which can ensure the flange of the bushing and the depth of the bushing after pressing. The unloading is faster and more convenient, which helps to improve the overall work efficiency.

[0030] Moreover, the product is highly versatile; by changing the cylinder and pressure head, it can be adapted to various bushing pressing environments.

[0031] This invention can effectively solve the problems of unstable bushing springback and incomplete flanging in existing bushing pressing devices. By adding a return mechanism at the bottom, this invention can realize the alternating reciprocating motion of the top pressing head and the bottom return mechanism, and can also improve the bushing springback and flanging problems, thereby ensuring the dimensional stability of the bushing after pressing and improving the quality of the product.

[0032] Working principle: First, place the product on the press machine fixture, install the rubber bushing on the press head, and start the equipment; use the first servo press 2 to drive the first press head 21 and the second servo press 3 to drive the second press head 34 to press the product downwards and press the bushing. The bushing is pressed into the product, and the pressing depth needs to exceed the product drawing to ensure that the bushing can be fully turned over; at this time, the rubber bushing has a reverse elastic force. The bottom return cylinder pushes the bushing back 2mm, and the servo press presses the bushing down again, 0.5mm shallower than the first pressing depth. The bottom return cylinder pushes the bushing back 2mm, and the servo press presses the bushing down again, pressing to the middle value state; the first servo press ensures the turning over, and the two reciprocating movements of the return and servo press release the elastic force of the rubber, ensuring the dimensional stability of the rubber bushing after pressing.

[0033] The above embodiments are used to explain and illustrate the present utility model, and not to limit the utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims should be included within the protection scope of the present utility model.

Claims

1. A reciprocating press-fitting device for preventing rubber bushings from springing back, characterized in that: The device includes a body (1), a first servo press (2), and a second servo press (3). A top plate (10) is fixed to the upper end of the body (1), and the first servo press (2) is installed on the left front side of the top plate (10). A notch (11) is opened in the middle of the top plate (10), and the second servo press (3) is installed in the notch (11). A top frame (30) is fixed to the lower part of the second servo press (3), and the rear end of the top frame (30) is... A rear panel (31) is fixed, a pressure table structure (4) is installed in the middle of the inner rear side wall of the body (1), and a base (15) is fixed at the lower end of the body (1). A first lifting cylinder (101) is installed on the front left side of the bottom surface of the base (15), and a second lifting cylinder (16) is installed in the middle of the bottom surface of the base (15). A set of lower push rods (100) are installed at the upper ends of the second lifting cylinder (16) and the first lifting cylinder (101).

2. The reciprocating press-fitting device for preventing rubber bushing rebound according to claim 1, characterized in that, The top plate (10) is fixed with side fixing plates (14) at both ends. The lower end of the side fixing plate (14) is fixed on the base (15), and the inner side wall of the left side fixing plate (14) is provided with a first Z-axis linear guide rail (12).

3. The reciprocating press-fitting device for preventing rubber bushing rebound according to claim 1, characterized in that, A first shaft core sleeve (19) is installed on the front left side of the upper end face of the base (15), and a second shaft core sleeve (102) is installed in the middle of the upper end face of the base (15). The first shaft core sleeve (19) and the second shaft core sleeve (102) have the same structural configuration.

4. The reciprocating press-fitting device for preventing rubber bushing rebound according to claim 1, characterized in that, A clamping cylinder (13) is installed in the rear middle of the body (1), and a middle panel (17) is installed in the front middle of the upper end face of the base (15), and a protrusion (18) is installed in the center of the middle panel (17).

5. The reciprocating press-fitting device for preventing rubber bushing rebound according to claim 1, characterized in that, The first servo press (2) is provided with a first pressure head (21) at its lower end, and a set of rubber bushings are fitted on the first pressure head (21). The first pressure head (21) is aligned vertically with the first shaft core sleeve (19). The lower rod of the first servo press (2) passes through the side lifting platform (20). The left end of the side lifting platform (20) is provided with a first slider (22). The first slider (22) is slidably connected to the first Z-axis linear guide rail (12).

6. The reciprocating press-fitting device for preventing rubber bushing rebound according to claim 1, characterized in that, The front side of the rear panel (31) is provided with a second Z-axis linear guide (33), and a middle lifting platform (32) is slidably mounted on the second Z-axis linear guide (33). The lower end of the second servo press (3) is provided with a second pressure head (34). A set of rubber bushings is fitted on the second pressure head (34), and the lower rod of the second pressure head (34) passes through the middle lifting platform (32). The second pressure head (34) is aligned vertically with the second shaft core sleeve (102).

7. The reciprocating press-fitting device for preventing rubber bushing rebound according to claim 1, characterized in that, The pressure table structure (4) is provided with side connecting plates (40) on both the left and right sides. A rear support plate (42) is fixed to the rear of the upper end face of the side connecting plate (40), and a groove (41) is fixed to the front end of the rear support plate (42). A middle pad plate (43) is placed between the rear of the two sets of side connecting plates (40), and another set of grooves (41) is installed on the middle pad plate (43).

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