A radially adjustable spline expansion molding device for a shock absorber reservoir

Abstract

A radially adjustable spline expansion molding device for a shock absorber reservoir includes a base with a lower cylinder at its center on the upper surface. An upper cylinder, matching the lower cylinder, is positioned above it. The opening of the upper cylinder faces downwards, and the opening of the lower cylinder faces upwards. A movable hole communicating with the internal space of the upper cylinder is located at the center of its upper end face. A push rod, coaxial with the upper cylinder, is located inside the upper cylinder. A limiting part, fitting against the upper inner wall of the upper cylinder, is located on the outer wall of the push rod. A return spring, located outside the push rod, is positioned between the lower surface of the limiting part and the lower cylinder. The upper end of the push rod extends upwards through the movable hole. This radially adjustable spline expansion molding device for a shock absorber reservoir can adapt to expansion requirements of different diameters or depths through spline adjustment. Furthermore, individual splines can be replaced individually after wear, effectively reducing maintenance costs and improving repair efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive shock absorber component manufacturing, and in particular to a radially adjustable spline expansion molding device for shock absorber reservoirs. Background Technology

[0002] The annular recessed structure on the inner wall of the fluid reservoir of an automotive shock absorber is a core technological feature that ensures the performance of the shock absorber. This structure is used to precisely fix the position of the piston valve system, install the sealing components, and form the oil flow channel, directly affecting the damping characteristics and sealing reliability of the shock absorber.

[0003] The radial displacement of the spline in traditional integral expansion molds is fixed and cannot be adjusted. This means that liquid storage cylinders with different inner diameters and expansion depths require custom-made molds, which leads to a surge in production costs. Furthermore, the traditional welded spline structure cannot be disassembled individually. When the spline wears out, the entire mold must be replaced, resulting in downtime of 4-8 hours. This not only increases maintenance costs but also leads to low maintenance efficiency. Summary of the Invention

[0004] The present invention aims to solve the existing technical problem by providing a radially adjustable spline expansion molding device for a shock absorber reservoir. This device can adapt to expansion requirements of different diameters or depths through spline adjustment, and individual splines can be replaced individually after wear, effectively reducing maintenance costs and improving maintenance efficiency.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] This utility model discloses a radially adjustable spline expansion forming device for a shock absorber reservoir, comprising a base, a lower cylinder with a lower cylinder at its center on the upper surface of the base; an upper cylinder matching the lower cylinder above the lower cylinder; the opening of the upper cylinder faces downwards, and the opening of the lower cylinder faces upwards; a movable hole communicating with its internal space is provided at the center of the upper end face of the upper cylinder; a push rod coaxial with the upper cylinder is provided inside the upper cylinder; a limiting part is provided on the outer wall of the push rod that fits against the upper inner wall of the upper cylinder; a return spring is provided between the lower surface of the limiting part and the lower cylinder, outside the push rod; the upper end of the push rod extends upwards through the movable hole; a plurality of keyways communicating with its internal space are provided on the outer wall of the lower cylinder; a spline matching the spline is provided in the keyway; the spline is fixed in the keyway by an adjustable structure; when the push rod moves down to the spline position, the spline moves outwards along the keyway trajectory; an arc-shaped protrusion is provided in the middle of the outer wall of the spline.

[0007] The adjustable structure includes limiting grooves located on the upper and lower sides of the keyway, the limiting grooves being disposed on the outer wall of the lower cylinder; the limiting grooves are annular; the middle of the inner walls on both the upper and lower sides of the keyway is provided with sliding grooves that communicate with the limiting grooves; the upper and lower ends of the spline are provided with sliders that match the sliding grooves; the outer wall of the slider is provided with a retaining groove that matches the limiting groove; the limiting groove is provided with an elastic ring that matches it, and the elastic ring is retained in the retaining groove.

[0008] A series of circumferentially distributed spline inner walls enclose a conical hole that is wider at the top and narrower at the bottom; the conical hole is composed of a series of fan-shaped grooves provided on the inner wall of the spline; the outer wall of the lower end of the push rod is provided with a compression conical surface that is wider at the top and narrower at the bottom.

[0009] The elastic ring is made of rubber.

[0010] A ring-shaped boss extends upward from the edge of the upper end of the lower cylinder, and the lower end of the return spring presses against the upper surface of the boss; the boss is locked inside the lower end of the upper cylinder.

[0011] The base has a lower positioning notch on one side of its lower surface and an upper positioning notch on its upper surface that communicates with the lower positioning notch. The width of the upper positioning notch is smaller than that of the lower positioning notch. A matching locking block is provided inside the lower positioning notch. A positioning rod matching the upper positioning notch is provided on the upper surface of the locking block, and the upper end of the positioning rod passes upward through the upper positioning notch.

[0012] The lower cylinder has several clamping plates evenly distributed around its outer ring; the clamping plates enclose a tubular structure; the inner wall of the tubular structure has an annular groove; the annular groove is formed by arc-shaped grooves on the inner wall of the clamping plates; the position of the arc-shaped grooves corresponds to the position of the arc-shaped protrusions.

[0013] The beneficial effects of this utility model are:

[0014] Compared with the prior art, the radially adjustable spline expansion molding device for shock absorber reservoirs using the structure of this utility model allows the spline to move radially through the cooperation of the slider and the slide groove. The presence of the elastic ring can effectively lock the position of the spline, so that the radial displacement of the spline can be continuously adjusted to adapt to reservoirs with different inner diameters and expansion depths. Moreover, the elastic ring is detachable, so the spline can be replaced individually by simply removing the elastic ring from the limiting groove and the slot, effectively reducing maintenance costs and improving maintenance efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the radially adjustable spline expansion forming device for shock absorber reservoir of this utility model;

[0016] Figure 2 yes Figure 1 An enlarged view of part A;

[0017] Figure 3 This is a schematic diagram of the spline structure. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0019] Please see Figures 1 to 3 This utility model provides a radially adjustable spline expansion forming device for a shock absorber reservoir, including a base 1, a lower cylinder 2 disposed at the center of the upper surface of the base 1; an upper cylinder 3 disposed above the lower cylinder 2; the opening of the upper cylinder 3 faces downward, and the opening of the lower cylinder 2 faces upward; a movable hole 4 communicating with its internal space is disposed at the center of the upper end face of the upper cylinder 3; a push rod 5 coaxial with the upper cylinder 3 is disposed inside the upper cylinder 3; the outer wall of the push rod 5 is provided with a part that abuts against the upper inner wall of the upper cylinder 3. The limiting part 6 is connected; a return spring 7 is provided between the lower surface of the limiting part 6 and the lower cylinder 2 and is fitted outside the push rod 5; the upper end of the push rod 5 extends upward through the movable hole 4; the outer wall of the lower cylinder 2 is provided with several keyways 8 that communicate with its internal space; a matching spline 9 is provided in the keyway 8; the spline 9 is fixed in the keyway 8 by an adjustable structure; when the push rod 5 moves down to the position of the spline 9, the spline 9 moves outward along the trajectory of the keyway 8; an arc-shaped protrusion 10 is provided in the middle of the outer wall of the spline 9.

[0020] The adjustable structure includes limiting grooves 11 located on the upper and lower sides of the keyway 8, the limiting grooves 11 being disposed on the outer wall of the lower cylinder 2; the limiting grooves 11 are annular; the middle of the inner walls on the upper and lower sides of the keyway 8 is provided with sliding grooves 12 that communicate with the limiting grooves 11; the upper and lower ends of the spline 9 are provided with sliders 13 that match the sliding grooves 12; the outer wall of the sliders 13 is provided with slots 14 that match the limiting grooves 11; the limiting grooves 11 are provided with elastic rings 15 that match them, and the elastic rings 15 are locked in the slots 14.

[0021] A conical hole is formed by the inner walls of several circumferentially distributed splines 9; the conical hole is composed of several fan-shaped grooves 16 provided on the inner walls of the splines 9; the outer wall of the lower end of the push rod 5 is provided with a compression conical surface 17 that is wider at the top and narrower at the bottom.

[0022] The elastic ring 15 is made of rubber.

[0023] A ring-shaped boss 18 extends upward from the edge of the upper end of the lower cylinder 2, and the lower end of the return spring 7 presses against the upper surface of the boss 18; the boss 18 is locked inside the lower end of the upper cylinder 3.

[0024] The base 1 has a lower positioning notch 19 on one side of its lower surface and an upper positioning notch 20 on its upper surface that communicates with the lower positioning notch 19. The width of the upper positioning notch 20 is smaller than that of the lower positioning notch 19. The lower positioning notch 19 has a matching locking block 21 inside it. The upper surface of the locking block 21 has a positioning rod 22 that matches the upper positioning notch 20, and the upper end of the positioning rod 22 passes upward through the upper positioning notch 20.

[0025] The lower cylinder 2 has several clamping plates 23 evenly distributed around its outer circumference; the clamping plates 23 enclose a tubular structure; the inner wall of the tubular structure is provided with an annular groove; the annular groove is formed by arc-shaped grooves 24 provided on the inner wall of the clamping plates 23; the position of the arc-shaped grooves 24 corresponds to the position of the arc-shaped protrusions 10.

[0026] The method of using this utility model is as follows:

[0027] When it is necessary to perform bulging processing on the inner wall of the shock absorber reservoir, the reservoir can first be fitted onto the lower cylinder 2. At this time, the clamping plates 23 can approach each other with the help of special equipment, thereby forming a tubular structure to clamp the outer wall of the reservoir. As the reservoir is clamped, the hydraulic press can push the upper end of the push rod 5 downward. At this time, the push rod 5 moves down and the lower end of the push rod 5 continuously approaches the conical hole formed by several splines 9. When the lower end of the push rod 5 enters the conical hole, the extrusion cone surface 17 at the lower end of the push rod can extrude the inner wall of the conical hole outward, thereby causing several circumferentially distributed splines 9 to move outward synchronously along the trajectory of the keyway 8. When the splines 9 move outward, the arc-shaped protrusions 10 move outward synchronously and extrude the inner wall of the reservoir. At this time, the annular groove formed by the arc-shaped grooves 24 on the inner wall of several clamping plates 23 can plastically deform the reservoir when it deforms outward locally. Finally, the outer wall of the reservoir can form an annular bulge, thereby completing the bulging processing.

[0028] In summary, the spline 9 of this invention can achieve radial movement through the cooperation of the slider 13 and the groove 12. The presence of the elastic ring 15 can effectively lock the position of the spline 9, thereby allowing the radial displacement of the spline 9 to be continuously adjusted to adapt to liquid storage cylinders with different inner diameters and expansion depths. Furthermore, the elastic ring 15 is a detachable design, so the spline 9 can be individually replaced by removing the elastic ring 15 from the limiting groove 11 and the slot 14, effectively reducing maintenance costs and improving maintenance efficiency.

[0029] A conical hole is formed by the inner walls of several circumferentially distributed splines 9. The conical hole is composed of several fan-shaped grooves 16 on the inner walls of the splines 9. The outer wall of the lower end of the push rod 5 is provided with a compression cone surface 17 that is wider at the top and narrower at the bottom. When the inner wall of the conical hole is compressed by the compression cone surface 17, the fan-shaped grooves on the inner wall of the spline groove 8 forcefully guide all splines 9 to move radially synchronously, further ensuring the quality of the expansion.

[0030] A ring-shaped boss 18 extends upward from the upper end of the lower cylinder 2. The lower end of the return spring 7 presses against the upper surface of the boss 18. The boss 18 is locked inside the lower end of the upper cylinder 3. The presence of the boss 18 can further ensure the coaxiality between the upper cylinder 3 and the lower cylinder 2, thereby ensuring that the extrusion cone surface 17 at the lower end of the push rod 5 can accurately apply pressure to the spline 9.

[0031] A lower positioning notch 19 is provided on one side of the lower surface of the base 1, and an upper positioning notch 20 is provided on the upper surface of the base 1, which is connected to the lower positioning notch 19. The width of the upper positioning notch 20 is smaller than that of the lower positioning notch 19. A matching locking block 21 is provided in the lower positioning notch 19. A positioning rod 22 matching the upper positioning notch 20 is provided on the upper surface of the locking block 21. The upper end of the positioning rod 22 passes through the upper positioning notch 20. This limiting method facilitates the disassembly and assembly of the locking block 21 and the positioning rod 22. The positioning rod 22 can be positioned by its upper end face to the liquid storage cylinder that needs to be expanded, so as to ensure the expansion quality of the liquid storage cylinder. When the liquid storage cylinder is sleeved on the lower cylinder body, the lower end face of the liquid storage cylinder is in contact with the upper end face of the positioning rod 22. At this time, the position of the liquid storage cylinder is positioned, and then it can be clamped by the clamping plate 23. In the actual positioning process, positioning rods 22 of different lengths can be selected according to actual needs.

Claims

1. A radially adjustable spline expansion molding device for a shock absorber reservoir, comprising a base, characterized in that: The base has a lower cylinder at its center on its upper surface; an upper cylinder is positioned above the lower cylinder; the opening of the upper cylinder faces downwards, and the opening of the lower cylinder faces upwards; the upper end face of the upper cylinder has a movable hole communicating with its internal space at its center; a push rod is coaxially mounted inside the upper cylinder; a limiting part is provided on the outer wall of the push rod, which fits against the inner wall of the upper side of the upper cylinder; a return spring is provided between the lower surface of the limiting part and the lower cylinder, located outside the push rod; the upper end of the push rod extends upwards through the movable hole; the outer wall of the lower cylinder has several keyways communicating with its internal space; a spline is provided within the keyway; the spline is fixed within the keyway by an adjustable structure; when the push rod moves down to the spline position, the spline moves outwards along the keyway trajectory; an arc-shaped protrusion is provided in the middle of the outer wall of the spline.

2. A radial adjustable spline swage forming device for a shock absorber reservoir as defined in claim 1, wherein: The adjustable structure includes limiting grooves located on the upper and lower sides of the keyway, the limiting grooves being disposed on the outer wall of the lower cylinder; the limiting grooves are annular; the middle of the inner walls on both the upper and lower sides of the keyway is provided with sliding grooves that communicate with the limiting grooves; the upper and lower ends of the spline are provided with sliders that match the sliding grooves; the outer wall of the slider is provided with a retaining groove that matches the limiting groove; the limiting groove is provided with an elastic ring that matches it, and the elastic ring is retained in the retaining groove.

3. A radial adjustable spline swage forming device for a shock absorber reservoir as defined in claim 2 wherein: A series of circumferentially distributed spline inner walls enclose a conical hole that is wider at the top and narrower at the bottom; the conical hole is composed of a series of fan-shaped grooves provided on the inner wall of the spline; the outer wall of the lower end of the push rod is provided with a compression conical surface that is wider at the top and narrower at the bottom.

4. A radial adjustable spline swage forming device for a shock absorber reservoir as defined in claim 2 wherein: The elastic ring is made of rubber.

5. The radially adjustable spline expansion forming device for a shock absorber reservoir according to claim 1, characterized in that: A ring-shaped boss extends upward from the edge of the upper end of the lower cylinder, and the lower end of the return spring presses against the upper surface of the boss; the boss is locked inside the lower end of the upper cylinder.

6. A radial adjustable spline swage forming device for a shock absorber reservoir as defined in claim 1, wherein: The base has a lower positioning notch on one side of its lower surface and an upper positioning notch on its upper surface that communicates with the lower positioning notch. The width of the upper positioning notch is smaller than that of the lower positioning notch. A matching locking block is provided inside the lower positioning notch. A positioning rod matching the upper positioning notch is provided on the upper surface of the locking block, and the upper end of the positioning rod passes upward through the upper positioning notch.

7. A radial adjustable spline swage forming device for a shock absorber reservoir as defined in claim 1, wherein: The lower cylinder has several clamping plates evenly distributed around its outer ring; the clamping plates enclose a tubular structure; the inner wall of the tubular structure has an annular groove; the annular groove is formed by arc-shaped grooves on the inner wall of the clamping plates; the position of the arc-shaped grooves corresponds to the position of the arc-shaped protrusions.

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