Packing cup press fitting tool

Abstract

The utility model relates to the technical field of packing cup assembly, in particular to a packing cup press fitting tool which comprises an upper pressing plate and a lower pressing plate, the lower pressing plate is arranged under the upper pressing plate, a guide column is arranged between the upper pressing plate and the lower pressing plate, the upper pressing plate and the lower pressing plate are connected in a sliding mode through the guide column, and a pressing head is arranged on the lower surface of the upper pressing plate. A positioning supporting block is further arranged on the lower pressing plate, a concave hole is formed in the upper surface of the positioning supporting block, a pressed part is placed in the concave hole, and the pressing head is aligned with the concave hole. According to the utility model, the position of the pressed piece can be limited while the leather cup machine type in the pressed piece is pressed, so that the pressed piece is prevented from deviating in the pressing process to cause that the pressed piece is not pressed in place.

Description

A leather cup pressing fixture Technical Field

[0001] This utility model relates to the field of leather cup assembly technology, and more specifically, to a leather cup pressing tool. Background Technology

[0002] Leather cups are components primarily used in automotive hydraulic braking systems, clutch control systems, power assist systems, and suspension systems to transmit pressure and provide sealing. Leather cups are generally assembled using a press-fit method. The press-fit fixture for the sealing area is a crucial factor in ensuring the reliability of the seal after press-fitting; its design directly affects the sealing performance of the component. Improper press-fitting can lead to leakage at the seal, or even failure due to insufficient strength. With increasing urgency regarding environmental protection and cost reduction, press-fitting is becoming a preferred structural and manufacturing process for many automotive parts, replacing structural adhesive sealing or welding. A well-designed press-fit fixture is essential to ensure the sealing performance of the pressed-fit product. In hydraulic suspension systems, leather cups are used for bottom sealing. A clamping ring is needed to fix the leather cup. However, if the clamping ring, through an interference fit and press-fitting with the base, fails to properly hold the leather cup in place, hydraulic oil can leak from the interference fit surface between the leather cup and the base, affecting the suspension's damping performance. This problem mainly arises from the lack of a restraining structure between the pressure head and the part in the tooling design. This results in insufficient positioning of the part within the tooling, causing it to move laterally during pressing, leading to over-pressurization on one side and under-pressurization on the other. Under-pressurization leads to insufficient rubber sealing, allowing liquid to leak from the sealing surface during use, causing the suspension and vibration damping function to fail. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a leather cup pressing fixture, which can not only press the leather cup in the pressed part, but also restrict the position of the pressed part, so as to avoid the pressed part from shifting during the pressing process and causing incomplete pressing.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a leather cup pressing fixture, including an upper pressing plate and a lower pressing plate, the lower pressing plate being disposed directly below the upper pressing plate, a guide post being disposed between the upper pressing plate and the lower pressing plate, the upper pressing plate and the lower pressing plate being slidably connected through the guide post, a pressing head being disposed on the lower surface of the upper pressing plate, and a positioning support block being disposed on the lower pressing plate, the upper surface of the positioning support block being disposed with a concave hole, the pressed part being placed in the concave hole, and the pressing head being aligned with the concave hole.

[0005] In this technical solution, the lower pressure plate is installed on the press table, and the upper pressure plate is installed on the hydraulic cylinder at the top of the press. A pressure head is installed on the bottom surface of the upper pressure plate for pressing the workpiece. A positioning support block is provided on the lower pressure plate to support the workpiece. The workpiece includes a lower structure of the cup, a cup, and a clamping ring. The lower structure of the cup can engage with the clamping ring, and the cup is located between the clamping ring and the lower structure. During pressing, the lower structure of the cup is first placed on the support base, then the cup is placed on the lower structure, and finally the clamping ring is placed on the cup. The press is then started, driving the upper pressure plate downwards. The pressure head on the bottom surface of the upper pressure plate abuts against the clamping ring. Under the action of the pressure head, the clamping ring moves downwards and drives the cup into the lower structure. Finally, the pressure head presses the clamping ring into the lower structure of the cup and engages with it, thus pressing the cup into the lower structure. The upper surface of the positioning support block is provided with recessed holes, which are designed according to the shape of the part to be pressed. The part is installed in the recessed hole. On the one hand, the recessed hole provides space for the installation of the part; on the other hand, the wall of the recessed hole restricts the movement of the part and the pressure head. During the pressing process, if the pressure head drives the part to move and deviates, the side wall of the part will abut against the wall of the recessed hole, thus limiting the deviation of the part. This ensures that the part is kept in the correct orientation during the pressing process, preventing over-pressing on one side and under-pressing on the other, and ensuring uniform pressure on the clamping ring. The pressure head is aligned with the recessed hole and can extend into the recessed hole. When the movement direction of the pressure head deviates, the pressure head will also abut against the wall of the recessed hole, thus limiting the deviation of the pressure head. A guide post is provided between the upper pressure plate and the lower pressure plate. The upper pressure plate and the lower pressure plate are slidably connected by the guide post. The relative movement trajectory between the upper pressure plate and the lower pressure plate is restricted by the guide post, so that the relative movement between the upper pressure plate and the lower pressure plate remains stable and is not prone to deviation.

[0006] Preferably, the wall of the concave hole protrudes to the inside of the concave hole to form a boss structure, the boss structure extends into the lower part of the pressed part, and the top surface of the boss structure abuts against the pressed part.

[0007] Preferably, the cross-sectional area of ​​the upper end of the concave hole is larger than that of the pressed part, and the inner wall of the concave hole above the boss structure protrudes into the concave hole to form a positioning surface, which abuts against the side wall surface of the pressed part.

[0008] Preferably, at least one side of the positioning support block is provided with a notch, the notch is provided along the height direction of the positioning support block, and the notch communicates with the outside and the concave hole.

[0009] Preferably, the guide post includes an upper guide post and a lower guide post. The upper end of the upper guide post is fixedly installed on the bottom surface of the upper pressure plate, and the bottom surface of the lower guide post is fixedly installed on the top surface of the lower pressure plate. A guide hole is formed on the bottom surface of the upper guide post, and the diameter of the lower guide post is smaller than the diameter of the guide hole. The lower guide post is inserted into the guide hole and slidably connected to the guide hole.

[0010] Preferably, a limiting block is also provided at the lower end of the lower guide post, the diameter of the limiting block is larger than the diameter of the guide hole, and the top end of the limiting block abuts against the bottom end of the upper guide post.

[0011] Preferably, a plurality of guide posts are provided, and the plurality of guide posts are evenly distributed between the upper pressure plate and the lower pressure plate.

[0012] Preferably, the pressed part has a pressing ring for pressing the leather cup, and the outer contour of the pressing head is larger than the inner contour of the pressing ring and smaller than the outer contour of the pressing ring.

[0013] Preferably, the upper pressure plate is provided with a first mounting hole that penetrates the upper pressure plate, and the pressure head is provided with a second mounting hole. Both the first mounting hole and the second mounting hole are threaded holes, and the first mounting hole and the second mounting hole are fastened together by a first fastening bolt.

[0014] Preferably, the lower pressure plate is provided with a third mounting hole that penetrates the lower pressure plate, and the bottom of the positioning support block is provided with a fourth mounting hole. Both the third mounting hole and the fourth mounting hole are threaded holes, and the third mounting hole and the fourth mounting hole are fastened together by a second fastening bolt.

[0015] Compared with existing technologies, the advantages of this technical solution are as follows: A positioning support block is provided to support the pressed part during the pressing process. The positioning support block has recessed holes for installing the pressed part, thus ensuring that the pressed part will not shift due to uneven pressure during pressing, achieving a dual function of support and positioning. The upper and lower pressure plates are slidably connected by guide columns, ensuring that the movement between the upper and lower pressure plates remains relatively stable and does not shift, thus ensuring the pressing effect. Attached Figure Description

[0016] Figure 1 is a perspective view of the leather cup pressing fixture of this utility model;

[0017] Figure 2 is a half-sectional view of the positioning support block in the leather cup pressing tool of this utility model;

[0018] Figure 3 is a perspective view of the guide column in the leather cup pressing tool of this utility model.

[0019] In the attached diagram: 1. Upper pressure plate; 2. Lower pressure plate; 3. Guide post; 4. Pressure head; 5. Positioning support block; 6. Concave hole; 7. Boss structure; 8. Positioning surface; 9. Notch; 11. First mounting hole; 31. Upper guide post; 32. Lower guide post. Detailed Implementation

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0023] Example 1

[0024] As shown in Figure 1, a cup pressing fixture includes an upper pressure plate 1 and a lower pressure plate 2. The lower pressure plate 2 is located directly below the upper pressure plate 1. A guide post 3 is provided between the upper pressure plate 1 and the lower pressure plate 2. The upper pressure plate 1 and the lower pressure plate 2 are slidably connected by the guide post 3. A pressure head 4 is provided on the lower surface of the upper pressure plate 1. A positioning support block 5 is also provided on the lower pressure plate 2. A recessed hole 6 is provided on the upper surface of the positioning support block 5. The workpiece to be pressed is placed in the recessed hole 6, and the pressure head 4 is aligned with the recessed hole 6. The lower pressure plate 2 is installed on the press table, and the upper pressure plate 1 is installed on the hydraulic cylinder at the top of the press. The pressure head 4 is installed on the bottom surface of the upper pressure plate 1 for pressing the workpiece. The positioning support block 5 on the lower pressure plate 2 is used to support the workpiece to be pressed. The workpiece to be pressed includes a lower structure of the cup, a cup, and a clamping ring. The lower structure of the cup can be engaged with the clamping ring, and the cup is located between the clamping ring and the lower structure of the cup. During the press-fitting process, the lower structure of the cup is first placed on the support base, then the cup is placed on the lower structure, and finally the clamping ring is placed on the cup. The press is then started, driving the upper pressure plate 1 downwards. The pressure head 4, located on the bottom surface of the upper pressure plate 1, abuts against the clamping ring. Under the action of the pressure head 4, the clamping ring moves downwards, driving the cup into the lower structure. Finally, the pressure head 4 presses the clamping ring into the lower structure and engages it, thus press-fitting the cup into the lower structure. The upper surface of the positioning support block 5 is provided with a recessed hole 6, which is designed according to the shape of the part to be pressed. The part to be pressed is installed in the recessed hole 6. On the one hand, the recessed hole 6 provides space for the installation of the part to be pressed. On the other hand, the wall of the recessed hole 6 restricts the movement of the part to be pressed and the movement of the pressing head 4. During the pressing process, if the pressing head 4 drives the part to move and deviates, the side wall of the part to be pressed will abut against the wall of the recessed hole 6, thereby restricting the deviation of the part to be pressed. This ensures that the part to be pressed can maintain the correct orientation during the pressing process, and there will be no situation where one side is over-pressed and the other side cannot be pressed down, thus ensuring that the pressing ring is pressed evenly. The pressing head 4 is aligned with the recessed hole 6 and can extend into the recessed hole 6. When the movement direction of the pressing head 4 deviates, the pressing head 4 will also abut against the wall of the recessed hole 6, thereby restricting the deviation of the pressing head 4. A guide post 3 is provided between the upper pressure plate 1 and the lower pressure plate 2. The upper pressure plate 1 and the lower pressure plate 2 are slidably connected by the guide post 3. The relative movement trajectory between the upper pressure plate 1 and the lower pressure plate 2 is restricted by the guide post 3, so that the relative movement between the upper pressure plate 1 and the lower pressure plate 2 remains stable and is not prone to deviation.

[0025] As shown in Figure 2, a boss structure 7 protrudes from the inner side of the concave hole 6, extending below the pressed part. The top surface of the boss structure 7 abuts against the pressed part. The bottom surface of the pressed part is irregularly shaped. If the pressed part is placed directly at the bottom of the concave hole, it may overturn or be damaged during the pressing process due to the unfavorable stress conditions caused by its irregular shape. Therefore, the boss structure 7 is necessary. The boss structure 7 is positioned circumferentially around the concave hole 6 according to the shape of the pressed part, thus selecting an ideal stress position to support the pressed part and determining its vertical position. Simultaneously, the pressed part supported by the boss structure 7 is suspended, thus adapting to its irregular shape.

[0026] As shown in Figure 2, the cross-sectional area of ​​the recess 6 is larger than that of the workpiece being pressed. The inner wall of the recess 6 above the boss structure 7 protrudes into the recess 6 to form a positioning surface 8, which abuts against the side wall of the workpiece. The fact that the cross-sectional area of ​​the recess 6 is larger than that of the workpiece ensures that the workpiece can be smoothly placed inside the recess 6. The positioning surface 8 in the recess 6 is used to determine the position of the workpiece. When the side wall of the workpiece abuts against the positioning surface 8, the workpiece is in the ideal pressing position. The positioning surface 8 also determines the horizontal position of the workpiece.

[0027] As shown in Figure 1, at least one side of the positioning support block 5 is provided with a notch 9, which is set along the height direction of the positioning support block 5 and connects the outside to the recess 6. By designing the notch 9, on the one hand, the operator can directly observe the state of the pressed part during the pressing process through the notch 9, and on the other hand, the operator can reach into the recess 6 through the notch 9 to facilitate the removal of the pressed part from the recess 6 after the pressing is completed.

[0028] As shown in Figure 2, the pressed part has a clamping ring for clamping the cup. The outer contour of the pressure head 4 is larger than the inner contour of the clamping ring but smaller than the outer contour of the clamping ring. This arrangement ensures that the pressure head 4 can apply pressure to the clamping ring and can smoothly extend into the recessed hole 6, ensuring proper pressing.

[0029] Example 2

[0030] This embodiment is similar to Embodiment 1 above, except that, as shown in Figure 3, the guide post 3 includes an upper guide post 31 and a lower guide post 32. The upper end of the upper guide post 31 is fixedly installed on the bottom surface of the upper pressure plate 1, and the bottom surface of the lower guide post 32 is fixedly installed on the top surface of the lower pressure plate 2. A guide hole is formed on the bottom surface of the upper guide post 31, and the diameter of the lower guide post 32 is smaller than the diameter of the guide hole. The lower guide post 32 is inserted into the guide hole and slidably connected to it. By inserting the lower guide post 32 into the guide hole, the relative movement between the upper guide post 31 and the lower guide post 32 is more restricted. Regardless of the direction of deviation during the relative movement of the upper guide post 31 and the lower guide post 32, the lower guide post 32 will abut against the wall of the guide hole, thereby limiting the relative deviation between the upper guide post 31 and the lower guide post 32.

[0031] As shown in Figure 3, a limiting block 33 is also provided at the lower end of the lower guide post 32. The diameter of the limiting block 33 is larger than the diameter of the guide hole, and the top end of the limiting block 33 abuts against the bottom end of the upper guide post 31. By setting the limiting block 33, the position of the upper guide post 31 can be restricted, thereby restricting the position of the upper pressure plate 1 and preventing the upper pressure plate 1 from being over-pressed, which could damage the pressed part.

[0032] As shown in Figure 1, multiple guide posts 3 are provided, and the multiple guide posts 3 are evenly distributed between the upper pressure plate 1 and the lower pressure plate 2. The multiple guide posts 3 can restrict the relative movement between the upper pressure plate 1 and the lower pressure plate 2 from multiple positions, and have a better guiding effect.

[0033] Example 3

[0034] This embodiment is similar to Embodiment 1 above, except that, as shown in Figure 1, the upper pressure plate 1 has a first mounting hole 11 that penetrates through the upper pressure plate 1, and the pressure head 4 has a second mounting hole. Both the first mounting hole 11 and the second mounting hole are threaded holes, and are fastened together by a first fastening bolt. During daily use, operators can quickly install and remove the pressure head 4 by tightening the first fastening bolt, facilitating the replacement and adjustment of the pressure head 4 so that the tooling can be adapted to different pressing requirements.

[0035] As shown in Figure 1, a third mounting hole is provided on the lower pressure plate 2, which penetrates the lower pressure plate. A fourth mounting hole is provided at the bottom of the positioning support block 5. Both the third mounting hole 21 and the fourth mounting hole are threaded holes, and the third mounting hole and the fourth mounting hole are fastened together by a second fastening bolt. During daily use, the operator can quickly install and remove the positioning support block 5 by tightening the second fastening bolt, which facilitates the replacement and adjustment of the positioning support block 5, allowing the tooling to adapt to different pressing requirements.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pressing fixture for leather cups, characterized in that, It includes an upper pressure plate (1) and a lower pressure plate (2). The lower pressure plate (2) is located directly below the upper pressure plate (1). A guide post (3) is provided between the upper pressure plate (1) and the lower pressure plate (2). The upper pressure plate (1) and the lower pressure plate (2) are slidably connected by the guide post (3). A pressure head (4) is provided on the lower surface of the upper pressure plate (1). A positioning support block (5) is also provided on the lower pressure plate (2). A recessed hole (6) is provided on the upper surface of the positioning support block (5). The pressed part is placed in the recessed hole (6). The pressure head (4) is aligned with the recessed hole (6).

2. The leather cup pressing fixture according to claim 1, characterized in that, The wall of the recessed hole (6) protrudes to the inside of the recessed hole (6) to form a boss structure (7), the boss structure (7) extends into the lower part of the pressed part, and the top surface of the boss structure (7) abuts against the pressed part.

3. The leather cup pressing fixture according to claim 2, characterized in that, The cross-sectional area of ​​the recess (6) is larger than that of the pressed part. The inner wall of the recess (6) above the boss structure (7) protrudes into the recess (6) to form a positioning surface (8). The positioning surface (8) abuts against the side wall surface of the pressed part.

4. The leather cup pressing fixture according to claim 1, characterized in that, At least one side of the positioning support block (5) is provided with a notch (9), the notch (9) is provided along the height direction of the positioning support block (5), and the notch (9) connects the outside to the recess (6).

5. The leather cup pressing fixture according to claim 1, characterized in that, The guide post (3) includes an upper guide post (31) and a lower guide post (32). The upper end of the upper guide post (31) is fixedly installed on the bottom surface of the upper pressure plate (1), and the bottom surface of the lower guide post (32) is fixedly installed on the top surface of the lower pressure plate (2). A guide hole is provided on the bottom surface of the upper guide post (31). The diameter of the lower guide post (32) is smaller than the diameter of the guide hole. The lower guide post (32) is inserted into the guide hole and slidably connected to the guide hole.

6. The leather cup pressing fixture according to claim 5, characterized in that, The lower end of the lower guide post (32) is also provided with a limiting block (33), the diameter of the limiting block (33) is larger than the diameter of the guide hole, and the top end of the limiting block (33) abuts against the bottom end of the upper guide post (31).

7. The leather cup pressing fixture according to claim 1, characterized in that, Multiple guide posts (3) are provided, and the multiple guide posts (3) are evenly distributed between the upper pressure plate (1) and the lower pressure plate (2).

8. The leather cup pressing fixture according to claim 1, characterized in that, The pressed part has a pressing ring for pressing the leather cup, and the outer contour of the pressing head (4) is larger than the inner contour of the pressing ring and smaller than the outer contour of the pressing ring.

9. The leather cup pressing fixture according to claim 1, characterized in that, The upper pressure plate (1) is provided with a first mounting hole (11), which penetrates the upper pressure plate (1). The pressure head (4) is provided with a second mounting hole. Both the first mounting hole (11) and the second mounting hole are threaded holes. The first mounting hole (11) and the second mounting hole are fastened together by a first fastening bolt.

10. The leather cup pressing fixture according to claim 1, characterized in that, The lower pressure plate (2) is provided with a third mounting hole, which penetrates the lower pressure plate. The bottom of the positioning support block (5) is provided with a fourth mounting hole. Both the third mounting hole (21) and the fourth mounting hole are threaded holes. The third mounting hole and the fourth mounting hole are fastened together by a second fastening bolt.

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