A strut-type shock absorber assembly

Abstract

The application belongs to the technical field of shock absorbers, and discloses a strut type shock absorber assembly, which comprises a liquid storage cylinder main body, a spring disc welded on the liquid storage cylinder main body, a piston rod sleeved in the liquid storage cylinder main body, a top rubber assembly connected with the piston rod, and a main spring abutting between the top rubber assembly and the spring disc, wherein the top rubber assembly comprises an outer end framework and an inner end framework riveted together, and a second vulcanized rubber body axially clamped between the outer end framework and the inner end framework, the second vulcanized rubber body is wrapped outside a first vulcanized rubber body, the first vulcanized rubber body is vulcanized and formed on an outer edge portion of a hollow flat plate-shaped connecting framework, and one end of the piston rod extending out of the liquid storage cylinder main body is connected with the connecting framework.

Description

Technical Field

[0001] This application relates to the field of vibration damper technology, specifically a strut-type vibration damper assembly. Background Technology

[0002] As a key component of the vehicle suspension system, the shock absorber ensures a smooth and comfortable driving experience. Existing shock absorbers typically involve directly vulcanizing the damping rubber onto the frame before connecting it to the piston rod or reservoir body. The two ends of the vulcanized rubber are completely suspended, relying mainly on the adhesive force between the outer wall and the frame for connection. When the shock absorber is working, this adhesive force exerts alternating bidirectional pure tearing forces on the vulcanized rubber, which can easily lead to premature cracking and failure. At the same time, because it is a rigid connection, torsional loads also act directly on the vulcanized rubber body, further reducing its service life. Therefore, further research and development are necessary. Utility Model Content

[0003] The purpose of this application is to provide a strut-type vibration damper assembly to solve the problems in the prior art.

[0004] To achieve the above objectives, this application provides the following technical solution: a pillar-type shock absorber assembly, comprising a liquid reservoir body, a spring disc welded to the liquid reservoir body, a piston rod slidably fitted inside the liquid reservoir body, a top rubber assembly connected to the piston rod, and a main spring abutting between the top rubber assembly and the spring disc. The top rubber assembly includes an outer end frame and an inner end frame that are fastened and riveted together, and a second vulcanized rubber body axially clamped between the outer end frame and the inner end frame. The second vulcanized rubber body is wrapped around the outside of the first vulcanized rubber body. The first vulcanized rubber body is vulcanized and formed on the outer edge of a hollow flat plate connecting frame. One end of the piston rod extending out of the liquid reservoir body is connected to the connecting frame.

[0005] Furthermore, the outer end skeleton is disc-shaped, and the inner end skeleton is a shell with a cylindrical inner cavity, and the edge of the shell extends radially with a flange that matches the outer diameter of the outer end skeleton; the two ends of the second vulcanized rubber body abut against the adjacent end faces of the outer end skeleton and the cylindrical inner cavity, respectively; both end faces of the second vulcanized rubber body are formed with axially concave tapered segments that gradually move away from the adjacent end faces of the outer end skeleton and the cylindrical inner cavity, and the tapered segments at both ends are coaxial with the second vulcanized rubber body, wherein the tapered segment facing the outer end skeleton has an arc-shaped transition between the outer edge of the corresponding end face of the second vulcanized rubber body.

[0006] Furthermore, the first vulcanized rubber body has a cylindrical structure and the joints between the two ends of its outer wall and the second vulcanized rubber body are mutually fitted arcs, and the inner diameter surface of the first vulcanized rubber body protrudes radially from the inner walls of the two ends of the second vulcanized rubber body.

[0007] Furthermore, a bearing assembly is provided between the main spring and the top rubber assembly. The bearing assembly includes an upper support plate fixedly connected to the outside of the inner end frame and a lower support plate rotatably connected to the upper support plate through an end face bearing. One end of the main spring abuts against the lower support plate, and the other end abuts against the spring plate.

[0008] Furthermore, the strut-type shock absorber assembly also includes a connecting end cap sleeved on the outer wall of the inner end frame and axially abutting against the flange on the side opposite to the outer end frame. The connecting end cap is open towards the spring disc. The upper support disc is housed within the connecting end cap, and its outer circumference abuts against the first inner wall of the connecting end cap. The upper support disc has a radially convex inner ring flange at its opening end. The lower support disc has a bowl-shaped structure, and its outer flange extends radially towards the outer edge of the open end of the upper support disc. The outer wall of the outer flange has a first flange and a second flange axially spaced apart. The inner ring flange penetrates between the first flange and the second flange to restrict the lower support disc from axially disengaging from the upper support disc.

[0009] Furthermore, the connecting end cap also extends axially to form a second inner wall coaxial with the first inner wall. The inner diameter of the second inner wall is larger than that of the first inner wall, and the second inner wall is in clearance fit with the outer circular surface of the second flange.

[0010] Furthermore, the upper support plate and the lower support plate each have a recessed cavity formed between their adjacent surfaces to accommodate the end face bearing seat ring and the shaft ring respectively. The small-diameter sidewall of the recessed cavity has radially protruding positioning protrusions evenly distributed around its circumference to radially limit the seat ring or shaft ring.

[0011] The beneficial technical effects of this application are as follows: The strut-type vibration damper assembly provided by this application uses an outer end frame and an inner end frame structure that are fastened and riveted together. The outer end frame axially clamps and radially wraps the second vulcanized rubber body in the cylindrical inner cavity of the inner end frame. When the vibration damper is working, the axial force generated on the second vulcanized rubber body is mainly compression, which effectively reduces the axial tearing force. While ensuring the vibration damping effect, it effectively improves the service life of the vibration damper. At the same time, a first vulcanized rubber body is designed to be partially wrapped in the second vulcanized rubber body, and the two ends of the joint between the first vulcanized rubber body and the second vulcanized rubber body are mutually fitted arcs. This further reduces the stress concentration phenomenon when the vibration damping force is transmitted between the two, which is also conducive to improving the service life. Attached Figure Description

[0012] Figure 1 This is a partial sectional view of this application; Figure 2 for Figure 1 Enlarged view of a section at point A in the middle; Figure 3 for Figure 2 Enlarged view of a section at point B in the middle; Figure 4 for Figure 1 C-direction partial view; Figure 5 This is a cross-sectional view of the second vulcanized rubber body and the first vulcanized rubber body of this application; Figure 6 for Figure 1 Enlarged view of a section at point F in the middle; In the diagram: 1. Liquid reservoir body; 2. Spring disc; 3. Lower rubber pad; 4. Main spring; 5. Snap-fit ​​sleeve; 6. Dust cover; 7. Bearing assembly; 701. Lower support disc; 702. End face bearing; 703. Upper support disc; 704. Reinforcing rib; 705. Inner ring flange; 706. First flange; 707. Recessed cavity; 708. Positioning protrusion; 709. Outer flange; 710. Second flange; 8. Top rubber assembly; 801. Outer end frame; 802. Inner end frame; 803. Connecting frame; 804. First vulcanized rubber body; 805. Second vulcanized rubber body; 806. Riveting sleeve; 807. Connecting bolt; 808. Connecting end cap; 809. Recess; 810. First inner wall; 811. Second inner wall; 813. Cylindrical inner cavity; 814. Conical section; 815. Arc-shaped section; 9. Piston rod; 10. Anti-loosening nut. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] Please see Figure 1-5The strut-type vibration damper assembly provided in this embodiment includes a liquid reservoir body 1, a spring disc 2 welded to the liquid reservoir body 1, a piston rod 9 slidably fitted inside the liquid reservoir body 1, a top rubber assembly 8 connected to the piston rod 9, and a main spring 4 abutting between the top rubber assembly 8 and the spring disc 2. In this embodiment, to avoid impact noise caused by direct contact between the main spring 4 and the spring disc 2, a lower rubber pad 3 is also provided between the main spring 4 and the spring disc 2. The side of the lower rubber pad 3 that engages with the main spring 4 has a receiving groove that conforms to the shape of the main spring 4, and the side that contacts the spring disc 2 has a shape that matches a pre-set positioning groove on the spring disc 2. The top rubber assembly 8 includes an outer end frame 801 and an inner end frame 802 that are fastened and riveted together, and is axially clamped to the outer end frame 801. A second vulcanized rubber body 805 is located between the outer end frame 801 and the inner end frame 802. The second vulcanized rubber body 805 is wrapped around the outer side of the first vulcanized rubber body 804. The first vulcanized rubber body 804 is vulcanized and formed on the outer edge of a hollow flat plate connecting frame 803. One end of the piston rod 9 extends out of the liquid storage cylinder body 1 and is connected to the connecting frame 803. In this embodiment, through holes are provided on the axes of both the outer end frame 801 and the inner end frame 802, so that the threaded rod part and the front end of the smooth rod of the piston rod 9 can pass through the inner end frame 802. During assembly, the threaded rod part is passed through the through hole on the connecting frame 803 so that the end face of the smooth rod abuts against the inner end face of the connecting frame 803, and the anti-loosening nut 10 is screwed into the threaded rod part, so that the piston rod 9 and the connecting frame 803 are connected as one unit and effectively prevent loosening.

[0015] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 The outer end frame 801 is disc-shaped, and the inner end frame 802 is a shell with a cylindrical inner cavity 813, and the edge of the shell extends radially with a flange 812 that matches the outer diameter of the outer end frame 801. Please refer to this document for details. Figure 4 and Figure 6In this embodiment, three riveting positions are evenly distributed around the circumference of the outer end skeleton 801 along the axis of the flange 812. The outer end skeleton 801 and the inner end skeleton 802 are riveted together at the flange 802 position by the riveting sleeve 806. The adjacent surfaces of the outer end skeleton 801 and the inner end skeleton 802 at the riveting positions have facing bosses that are coaxial with the riveting sleeve 806, so that the boss surfaces abut against each other after riveting, thus ensuring a stable connection. On the surfaces facing away from each other, there are recessed... The hole accommodates the folded riveting edge formed by the riveting sleeve 806 after riveting, keeping the corresponding end face flat, which facilitates the positioning of other components in contact with it (such as the connecting end cap 808); the two ends of the second vulcanized rubber body 805 abut against the adjacent end faces of the outer end skeleton 801 and the cylindrical inner cavity 813, respectively; both end faces of the second vulcanized rubber body 805 have axially concave tapered segments 814 that gradually move away from the adjacent end faces of the outer end skeleton 801 and the cylindrical inner cavity 813, and the two ends... All tapered segments 814 are coaxial with the second vulcanized rubber body 805. The tapered segments 814 facing the outer end frame 801 have an arc-shaped transition segment 815 between them and the outer edge of the corresponding end face of the second vulcanized rubber body 805. In this embodiment, the tapered segment 814 facing the outer end frame 801 has a cone angle D of 85°, and the tapered segment 814 facing the inner end frame 802 has a cone angle E of 79°, to provide a greater vibration absorption distance during the compression stroke of the shock absorber and a greater restoring force during the recovery stroke, thus improving vibration damping sensitivity. As a further preferred embodiment, a connecting bolt 807 is welded onto the inner end frame 802. The threaded portion of the connecting bolt 807 extends beyond the inner end frame 802 and the outer end frame 801 and has a set effective length for connection with corresponding vehicle connecting parts. In this embodiment, the connecting bolt 807 and the riveting sleeve 806 are evenly and alternately distributed in the circumferential direction of the inner end frame 802 and the outer end frame 801.

[0016] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6The first vulcanized rubber body 804 has a cylindrical structure, and the two ends of its outer wall are joined with the second vulcanized rubber body 805 by mutually fitting arcs. The inner diameter surface of the first vulcanized rubber body 804 protrudes radially beyond the inner walls of the two ends of the second vulcanized rubber body 805. In this embodiment, the first vulcanized rubber body 804 can be first formed on the connecting skeleton 803 using a mold, and then the second vulcanized rubber body 805 can be formed from the first vulcanized rubber body 804 using another matching mold to form a composite structure. The design of the inner diameter surface of the first vulcanized rubber body 804 protruding radially beyond the inner walls of the two ends of the second vulcanized rubber body 805 facilitates mold sealing when forming the second vulcanized rubber body 805, preventing leakage of rubber material from the joint surface between the mold and the first vulcanized rubber body 804, and ensuring the molding effect. Furthermore, the two can be made of rubber materials with different hardness to form a vibration damping structure with a set hardness gradient, thus improving vibration damping sensitivity while ensuring service life.

[0017] With the above configuration, the strut-type shock absorber assembly provided in this application, through the snap-fit ​​and riveted outer and inner end frame structures, allows the outer end frame 801 to axially clamp and radially enclose the second vulcanized rubber body 805 within the cylindrical inner cavity 813 of the inner end frame 802. Thus, when the piston rod 9 acts on the second vulcanized rubber body 805 via the connecting frame 803 and the first vulcanized rubber body 804, the outer surface of the second vulcanized rubber body 805 will be pulled axially by the force and retract away from the inner wall of the cylindrical inner cavity 813, preventing damage to the corresponding part of the second vulcanized rubber body 805. The tearing force generated is mainly compression when the vibration damper is working on the second vulcanized rubber body 805, which effectively reduces the axial tearing force. While ensuring the vibration damping effect, it effectively improves the service life of the vibration damper. At the same time, since a first vulcanized rubber body 804 is also designed to be partially wrapped inside the second vulcanized rubber body 805, and the two ends of the joint between the first vulcanized rubber body 804 and the second vulcanized rubber body 805 are mutually fitted arcs, the stress concentration phenomenon during the transmission of vibration damping force between the two is further reduced, which also helps to improve the service life.

[0018] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 A bearing assembly 7 is provided between the main spring 4 and the top mount assembly 8. The bearing assembly 7 includes an upper support plate 703 fixedly connected to the outside of the inner end frame 802 and a lower support plate 701 rotatably connected to the upper support plate 703 through the end face bearing 702. One end of the main spring 4 abuts against the lower support plate 701 and the other end abuts against the spring plate 2. In this way, the rotational load generated between the vehicle suspension system and the wheel will be automatically released through the rotational effect of the bearing assembly 7, avoiding torsional action on the main spring 4 and the top mount assembly 8, which helps to ensure the stable performance of the shock absorber.

[0019] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 The strut-type shock absorber assembly also includes a connecting end cover 808 sleeved on the outer wall of the inner end frame 802 and axially abutting against the flange 812 on the side opposite to the outer end frame 801. The connecting end cover 808 is open towards the spring disc 2. The upper support disc 703 is housed within the connecting end cover 808, and its outer circumference abuts against the first inner wall 810 of the connecting end cover 808. The upper support disc 703 has a radially convex inner ring flange 705 at its opening end. The lower support disc 701 has a bowl-shaped structure, and its outer edge extending radially towards the open end of the upper support disc 703 forms an outer flange 709. The outer wall of the outer flange 709 has a first flange 706 and a second flange 710 axially spaced apart. The inner ring flange 705 penetrates between the first flange 706 and the second flange 710 to restrict the lower support disc 701 from axially disengaging from the upper support disc 703. Please refer to the following for details. Figure 3 During assembly, first, the end face bearing 702 (described later) is installed into the upper support plate 703. Then, the first flange 706 of the lower support plate 701 is aligned with the edge of the inner ring flange 705, and axially pressed in, taking advantage of the elastic deformation characteristics of both. Understandably, to facilitate pressing, multiple axially extending grooves (not shown) can be evenly distributed around the circumference of the inner ring flange 705 to improve its elasticity. For easy guidance and pressing, guide bevels are provided at the edges of both flanges. Finally, the assembled assembly is axially pressed into the connecting end cover 808, so that... The upper support plate 703 is fully inserted into the set position inside the connecting end cover 808. In this embodiment, the connecting end cover 808 has a recess 809 formed at the head of the connecting bolt 807 to accommodate the head of the connecting bolt 807, thereby avoiding mechanical interference between the two. The connecting end cover 808 is usually pressed into the outside of the inner end frame 802 using a tight fit process, thereby providing stable support for the upper support plate 703. The upper support plate 703 and the lower support plate 701 can usually be made of vulcanized rubber or engineering plastics, and their hardness can be set according to actual needs, which is not required here.

[0020] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 The connecting end cap 808 also extends axially to form a second inner wall 811 coaxial with the first inner wall 810. The inner diameter of the second inner wall 811 is larger than the inner diameter of the first inner wall 810. The second inner wall 811 and the outer circular surface of the second flange 710 are in clearance fit. This ensures that the upper support plate 703 and the lower support plate 701 can rotate flexibly through the end face bearing 702. On the other hand, the first inner wall 810, the second inner wall 811, the inner ring flange 705, the first flange 706, and the second flange 710 constitute a closed dustproof structure, which effectively prevents external impurities from entering the end face bearing 702 and ensures that the end face bearing 702 works normally.

[0021] In another embodiment of this application, please refer to [the relevant document / reference]. Figures 1 to 6 The upper support plate 703 and the lower support plate 701 each have a recessed cavity 707 formed between their adjacent surfaces to accommodate the seat ring and shaft ring of the end face bearing 702, respectively. The small-diameter sidewall of the recessed cavity 707 has radially protruding positioning protrusions 708 evenly distributed around its circumference for radially limiting the seat ring or shaft ring. In this embodiment, the outer wall of the inner end frame 802 passes through the upper support plate 703 and at least a portion axially enters the lower support plate 701, thereby bringing the end face bearing 702 closer to the connecting frame 803 axially, further improving the force balance performance. Simultaneously, to enhance the rigidity and strength of the lower support plate 701, reinforcing ribs 704 are provided on the inner wall and bottom wall of the lower support plate 701. There is a gap between the reinforcing rib 704 and the inner end frame 802 corresponding to the outer wall. It is understood that the bottom of the lower support plate 701 is also provided with a through hole for the piston rod 9 to pass through. In this embodiment, in order to protect the piston rod 9, a dust cover 6 is also provided on its outside. The end of the dust cover 6 that is fitted on the lower support plate 701 has a pressing edge. The corresponding end of the main spring 4 abuts against the end face of the pressing edge, thereby pressing this end of the dust cover 6 against the outer flange 709 of the support plate 701. The other end of the dust cover 6 is fixed to the liquid storage cylinder body 1 by a snap-fit ​​sleeve 5. Here, the snap-fit ​​sleeve 5 can adopt the existing technology in this technical field or a clamp-type structure.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A strut-type vibration damper assembly, comprising a reservoir body (1), a spring disc (2) welded to the reservoir body (1), a piston rod (9) slidably fitted within the reservoir body (1), a top rubber assembly (8) connected to the piston rod (9), and a main spring (4) abutting between the top rubber assembly (8) and the spring disc (2), characterized in that: The top rubber assembly (8) includes an outer end frame (801) and an inner end frame (802) that are fastened and riveted together, and a second vulcanized rubber body (805) that is axially clamped between the outer end frame (801) and the inner end frame (802). The second vulcanized rubber body (805) is wrapped around the outside of the first vulcanized rubber body (804). The first vulcanized rubber body (804) is vulcanized and formed on the outer edge of a hollow flat connecting frame (803). The piston rod (9) extends out of the liquid storage cylinder body (1) and is connected to the connecting frame (803).

2. The strut-type vibration damper assembly according to claim 1, characterized in that: The outer end frame (801) is disc-shaped, and the inner end frame (802) is a shell with a cylindrical inner cavity (813) and the edge of the shell extends radially to have a flange (812) that matches the outer diameter of the outer end frame (801); the two ends of the second vulcanized rubber body (805) abut against the adjacent end faces of the outer end frame (801) and the cylindrical inner cavity (813) respectively; both ends of the second vulcanized rubber body (805) are formed with axially concave tapered segments (814) that gradually move away from the adjacent end faces of the outer end frame (801) and the cylindrical inner cavity (813), and the tapered segments (814) at both ends are coaxial with the second vulcanized rubber body (805), wherein the tapered segment (814) facing the outer end frame (801) has an arc-shaped segment (815) transitioning between the outer edge of the corresponding end face of the second vulcanized rubber body (805).

3. The strut-type vibration damper assembly according to claim 1 or 2, characterized in that: The first vulcanized rubber body (804) has a cylindrical structure and the two ends of its outer wall are joined with the second vulcanized rubber body (805) in an arc shape. The inner diameter surface of the first vulcanized rubber body (804) protrudes radially from the inner walls of the two ends of the second vulcanized rubber body (805).

4. The strut-type vibration damper assembly according to claim 2, characterized in that: A bearing assembly (7) is provided between the main spring (4) and the top rubber assembly (8). The bearing assembly (7) includes an upper support plate (703) fixedly connected to the outside of the inner end frame (802) and a lower support plate (701) rotatably connected to the upper support plate (703) via an end face bearing (702). One end of the main spring (4) abuts against the lower support plate (701), and the other end abuts against the spring plate (2).

5. The strut-type vibration damper assembly according to claim 4, characterized in that: It also includes a connecting end cap (808) fitted onto the outer wall of the inner end frame (802) and axially abutting against the flange (812) on the side opposite to the outer end frame (801). The connecting end cap (808) is open towards the spring disc (2). The upper support disc (703) is housed within the connecting end cap (808) and its outer circumference abuts against the first inner wall (810) of the connecting end cap (808). The upper support disc (703) has a radially convex inner ring flange at its opening. 705); The lower support plate (701) has a bowl-shaped structure, and an outer flange (709) is formed radially extending from the outer edge of the open end facing the upper support plate (703). The outer wall of the outer flange (709) is axially spaced with a first flange (706) and a second flange (710). The inner ring flange (705) penetrates between the first flange (706) and the second flange (710) to restrict the lower support plate (701) from axially disengaging from the upper support plate (703).

6. The strut-type vibration damper assembly according to claim 5, characterized in that: The connecting end cap (808) also extends axially to form a second inner wall (811) coaxial with the first inner wall (810). The inner diameter of the second inner wall (811) is larger than the inner diameter of the first inner wall (810). The second inner wall (811) is in clearance fit with the outer circular surface of the second flange (710).

7. The strut-type vibration damper assembly according to claim 5, characterized in that: The upper support plate (703) and the lower support plate (701) each have a recessed cavity (707) formed between their adjacent surfaces to accommodate the seat ring and shaft ring of the end face bearing (702) respectively. The small-diameter sidewall of the recessed cavity (707) has a radially protruding positioning protrusion (708) evenly distributed around its circumference to radially limit the seat ring or shaft ring.

Images