Adjustable automobile shock support

Abstract

The utility model discloses an adjustable automobile shock support, including support frame, the upper and lower both ends of support frame all are provided with shock absorber, still including adjusting mechanism and connecting mechanism, adjusting mechanism: it includes internal thread cylinder and screw rod, internal thread cylinder is rotated and is connected in the upper and lower both ends of support frame through bearing respectively, and the middle part of two relative inner surfaces of shock absorber is fixedly connected respectively to screw rod, and the outer surface of screw rod all are connected with the internal thread of vertically adjacent internal thread cylinder, connecting mechanism: it includes connecting cylinder, baffle, sliding slot two and limit stop, connecting cylinder sets up respectively in the front end of shock absorber, this adjustable automobile shock support, with adjusting mechanism realizes two shock absorber interval adjustment, satisfies the installation demand of different frame, and improves the stability of clamping mechanism to improve the use convenient degree and stability of automobile shock support greatly.

Description

Technical Field

[0001] This utility model relates to the field of automotive equipment technology, specifically to an adjustable automotive shock absorber bracket. Background Technology

[0002] Car shock absorber brackets are an important component of the car suspension system. Connected to the car body, they support the vehicle and maintain its stability. When a vehicle is traveling on the road, the road surface exerts a reaction force on the wheels. This reaction force is transmitted to the car body through the shock absorber brackets, allowing the driver and passengers to feel the road conditions. When the vehicle is traveling on uneven roads, the shock absorber brackets absorb and mitigate the impact of the road surface, reducing vehicle vibration and bumps, and improving ride comfort. The shock absorber brackets also suppress vehicle bouncing during driving, keeping the vehicle stable and improving driving safety.

[0003] In the prior art, patent CN222698249U discloses an adjustable car shock absorber bracket, including a base. The top two ends of the base are fixed with lower side plates, and the upper side plates are provided above the lower side plates. The top two ends of the lower side plates are chiseled with flat thread grooves. The adjusting rod achieves the effect of limiting rotation through the meshing of the flat thread and the flat thread groove. The threaded teeth and the threaded groove are threadedly connected. During adjustment, the distance between the lower side plates and the upper side plates can be adjusted by turning the nut with a wrench. After the adjustment is completed, the top plate is embedded into the top groove and the insert is embedded into the bottom groove. At this time, the position of the outer toothed cylinder will match the position of the insert. The outer toothed cylinder is pushed up by the tension of the spring rod at the bottom of the adjusting cylinder and inserted into the tooth groove, and then meshes with it. This prevents the top of the adjusting rod from rotating when subjected to frequent vibrations, thus playing a role in preventing the threads from coming loose and avoiding changes in the shock absorber damping force. This adjustable car shock absorber bracket has some problems. It cannot adjust the spacing of the shock absorber bars or the spacing of the mounting units, and it cannot meet the installation requirements of different vehicle frame sizes. In addition, the connecting holes are directly connected to the wheel hub frame through bearings, which limits the tightness of the connection between the connecting holes and the wheel hub frame when dealing with wheel hub frames of different sizes. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an adjustable car shock absorber bracket. The adjustment mechanism enables the adjustment of the distance between the two shock absorber rods to meet the installation requirements of different vehicle frames. At the same time, the clamping mechanism improves the stability of the connection between the shock absorber bracket and the wheel hub frame, which greatly improves the ease of use and stability of the car shock absorber bracket and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable car shock absorber bracket, including a support frame, shock absorber rods are provided at both the upper and lower ends of the support frame, and also includes an adjustment mechanism and a connecting mechanism; Adjustment mechanism: It includes an internal threaded cylinder and a screw. The internal threaded cylinder is rotatably connected to the upper and lower ends of the support frame through bearings. The screw is fixedly connected to the middle of the inner surfaces of two opposing shock-absorbing rods. The outer surfaces of the screws are all threadedly connected to the internal threads of the vertically adjacent internal threaded cylinders. Connection mechanism: It includes a connecting cylinder, a partition, a second sliding groove, and a limiting plate. The connecting cylinder is respectively set at the front end of the shock absorber rod. The partition is fixedly connected inside the connecting cylinder. The sliding groove is evenly distributed inside the partition. The limiting plate is slidably connected inside the sliding groove. The adjustment mechanism realizes the adjustment of the distance between the two shock absorber rods to meet the installation requirements of different vehicle frames. At the same time, the clamping mechanism improves the stability of the connection between the shock absorber bracket and the wheel hub frame, which greatly improves the ease of use and stability of the car shock absorber bracket.

[0006] Furthermore, the adjustment mechanism also includes a connecting seat, a first slide groove, a sliding seat, and a connecting rod. The first slide groove is symmetrically arranged on the opposite inner surfaces of the two damping rods. The interior of each first slide groove is slidably connected to a sliding seat. The outer surface of each connecting cylinder is fixedly connected to a limit ring. The outer surface of each limit ring is slidably connected to the interior of the laterally adjacent connecting seat. The end of each sliding seat near the support frame is rotatably connected to a connecting rod. The end of each connecting rod near the center of the support frame is rotatably connected to the outer arc surface of the adjacent connecting seat. The stability of the damping rod is improved by the diagonal bracing.

[0007] Furthermore, the connecting mechanism also includes an arc-shaped surface, a drive cylinder, a conical surface, an external thread, and a drive seat. The outer surface of the drive cylinder is provided with an external thread, and the inner wall of the connecting cylinder away from the support frame is provided with an internal thread. The internal threads are all threadedly connected to the vertically adjacent external threads. The six limiting plates located inside the same connecting cylinder are provided with an arc-shaped surface at the end of their inner surfaces closest to the support frame, and the six limiting plates located inside the same connecting cylinder are provided with an inclined surface at the end of their outer surfaces away from the support frame. The inner wall of the drive cylinder is provided with a conical surface, and the ends of the two connecting cylinders away from the support frame are fixedly connected to a drive seat to provide driving force for adjusting the centering distance of the limiting plates.

[0008] Furthermore, the front surface of the shock absorber rod is fixedly connected with symmetrically distributed supports. The interior of two supports located on the same horizontal plane is rotatably connected to the rear end of the same movable frame. The front end of the movable frame is fixedly connected to the outer surface of the longitudinally adjacent connecting cylinder, which facilitates the shock absorption of the wheel.

[0009] Furthermore, it also includes an adjustment seat one, which is rotatably connected to the middle of the front surface of the upper shock absorber rod, and an adjustment seat two is rotatably connected to the upper end of the lower movable frame. A shock absorber is provided between the adjustment seat one and the adjustment seat two to absorb the mechanical energy generated by the vibration during the movement of the wheels, thereby achieving overall shock absorption of the vehicle.

[0010] Furthermore, the support frame is equipped with bearing seats inside, and the rear ends of the two shock absorber rods are fixedly connected with symmetrically distributed mounting seats. The mounting seats are equipped with symmetrically distributed mounting holes inside, which facilitates the installation of the car shock absorber bracket.

[0011] Furthermore, a rotating ring is rotatably connected to the lower end of each drive seat. A rubber sealing sleeve is fixedly connected between the lower end of the rotating ring and the outer arc surface of the vertically adjacent connecting cylinder. A rubber sleeve is fixedly connected between the upper surface of the upper connecting seat and the lower surface of the upper shock absorber rod and the lower surface of the lower connecting seat and the upper surface of the lower shock absorber rod. The rubber sleeves are all fitted onto the outer surface of the adjacent screw rod to protect the external thread and the screw rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This adjustable car shock absorber bracket has the following advantages: 1. The rotation of the internal threaded cylinder acts on the corresponding screw, realizing the opposite movement of the two shock absorber rods. At the same time, the sliding seat slides inside the corresponding slide groove, so that the connecting rod can provide diagonal support for the shock absorber rods in different positions, ensuring the overall stability of the shock absorber bracket after the shock absorber rod spacing is adjusted, meeting the installation requirements of different vehicle frames, and greatly improving the ease of installation of the automotive shock absorber bracket.

[0013] 2. When the corresponding end of the wheel hub bracket enters the corresponding connecting cylinder, the drive cylinder enters the corresponding connecting cylinder. The conical surface of the drive cylinder pushes the limiting plate to move in a centered manner, so that the limiting plate achieves stability of the connection between the corresponding end of the wheel hub bracket. At the same time, the existence of the arc surface does not affect the mobility of the connection between the wheel hub bracket and the shock absorber bracket, which greatly improves the stability of the connection between the car shock absorber bracket and the wheel hub bracket. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the internal structure of this utility model; Figure 3 This is an enlarged structural diagram of point A in this utility model; Figure 4 This is an enlarged structural diagram of section B of the present invention; Figure 5 This is an exploded structural diagram of the connecting mechanism of this utility model; Figure 6This is an exploded cross-sectional view of the connection mechanism of this utility model.

[0015] In the diagram: 1 Support frame, 2 Adjustment mechanism, 21 Internal threaded cylinder, 22 Screw, 23 Connecting seat, 24 Slide groove one, 25 Sliding seat, 26 Connecting rod, 3 Connecting mechanism, 31 Connecting cylinder, 32 Partition plate, 33 Slide groove two, 34 Limiting plate, 35 Arc surface, 36 Drive cylinder, 37 Conical surface, 38 External thread, 39 Drive seat, 4 Shock absorber rod, 5 Support, 6 Movable frame, 7 Adjustment seat one, 8 Adjustment seat two, 9 Shock absorber, 10 Bearing seat, 11 Mounting seat, 12 Rotating ring, 13 Rubber sealing sleeve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-6 This embodiment provides a technical solution: an adjustable car shock absorber bracket, including a support frame 1, with shock absorber rods 4 provided at both the upper and lower ends of the support frame 1, and also including an adjustment mechanism 2 and a connecting mechanism 3; Adjustment mechanism 2 includes an internally threaded cylinder 21 and a screw 22. The internally threaded cylinder 21 is rotatably connected to the upper and lower ends of the support frame 1 via bearings. The screw 22 is fixedly connected to the middle of the opposite inner surfaces of two damping rods 4. The outer surfaces of the screws 22 are threadedly connected to the internal surfaces of the vertically adjacent internally threaded cylinders 21. The adjustment mechanism 2 also includes a connecting seat 23, a slide groove 24, a sliding seat 25, and a connecting rod 26. The slide groove 24 is symmetrically arranged on the opposite inner surfaces of the two damping rods 4. The sliding seat 25 is slidably connected to the interior of each slide groove 24. The outer surface of each connecting cylinder 21 is fixedly connected to a limit ring. The outer surface of each limit ring is slidably connected to the interior of the horizontally adjacent connecting seat 23. The end of each sliding seat 25 near the support frame 1 is rotatably connected to a connecting rod 26. The end of each connecting rod 26 near the center of the support frame 1 is rotatably connected to the outer arc surface of the adjacent connecting seat 23. According to the required frame installation requirements, the two internally threaded cylinders 21 are rotated in sequence. The rotation of the internally threaded cylinders 21 causes the vertically adjacent screws 22 to... As the screw 22 moves closer to the support frame 1, it drives the corresponding shock absorber 4 to move closer to the support frame 1, thereby adjusting the distance between the two shock absorber 4 and the distance between the mounting base 11. During the rotation of the internal threaded cylinder 21, the connecting seat 23 is slidably connected to the limiting ring, so the connecting seat 23 will not rotate with the internal threaded cylinder 21 under the limiting action of the connecting rod 26. When the shock absorber 4 moves closer to the support frame 1, the sliding seat 25 moves away from the center of the support frame 1 inside the adjacent sliding groove 24. The outward movement of the sliding seat 25 drives the upper end of the vertically adjacent connecting rod 26 to move away from the center of the support frame 1. At the same time, the end of the connecting rod 26 closest to the center of the support frame 1 rotates outward. The internal threaded cylinder 21, screw 22, connecting rod 26 and shock absorber 4 always form a triangular structure, providing stable support for the shock absorber 4 in different positions and ensuring the overall stability of the car shock absorber bracket. When the shock absorber 4 reaches the required position, the rotation of the internal threaded cylinder 21 stops. Connection mechanism 3 includes a connecting cylinder 31, a partition plate 32, a second sliding groove 33, and a limiting plate 34. The connecting cylinders 31 are respectively disposed at the front end of the shock absorber rod 4. The partition plate 32 is fixedly connected inside each connecting cylinder 31. The second sliding groove 33 is evenly distributed inside each partition plate 32. The limiting plate 34 is slidably connected inside each second sliding groove 33 (the second sliding groove 33 and the limiting plate 34 are evenly distributed around the central axis of the corresponding connecting cylinder 31). The connection mechanism 3 also includes an arc-shaped surface 35, a drive cylinder 36, a conical surface 37, and an external thread 3. The outer surfaces of drive cylinder 36 and drive base 39 are provided with external threads 38. The inner wall of connecting cylinder 31 away from support frame 1 is provided with internal threads, which are threaded to the vertically adjacent external threads 38. The six limiting plates 34 located inside the same connecting cylinder 31 are provided with arc-shaped surfaces 35 at the inner surfaces near support frame 1, and the six limiting plates 34 located inside the same connecting cylinder 31 are provided with inclined surfaces at the outer surfaces away from support frame 1. The inner wall of drive cylinder 36 is provided with conical surfaces. 37. A drive seat 39 is fixedly connected to the end of each of the two connecting cylinders 31 furthest from the support frame 1. The corresponding ends of the outer hub frame are inserted into the interior of the corresponding connecting cylinder 31. Then, the drive seat 39 is rotated, causing the vertically adjacent drive cylinders 36 to rotate. Because the external thread 38 is threadedly connected to the internal thread inside the corresponding connecting cylinder 31, the drive cylinders 36 move towards the center of the support frame 1 within their respective connecting cylinders 31. The conical surface inside the drive cylinder 36 interacts with the inclined surface at the upper end of the limiting plate 34. When the surfaces are pressed together, the limiting plates 34 move towards the center of the adjacent connecting cylinder 31 inside the corresponding sliding groove 33. This allows the end of the limiting plate 34 near the center of the support frame 1 to stably clamp the corresponding end of the external wheel hub frame, improving the tightness of the connection between the external wheel hub frame and the car shock absorber bracket. At the same time, the arc-shaped surface 35 of the limiting plate 34 provides space for the positional changes of the external wheel hub frame during the movement of the car, avoiding the rigid connection between the external wheel hub frame and the car shock absorber bracket from affecting the car's shock absorption performance. Among them: the front surface of the shock absorber 4 is fixedly connected with symmetrically distributed supports 5, the interior of the two supports 5 located on the same horizontal plane is rotatably connected to the rear end of the same movable frame 6, the front end of the movable frame 6 is fixedly connected to the outer surface of the longitudinally adjacent connecting cylinder 31, the support frame 1 is provided with a bearing seat 10, the rear ends of the two shock absorber 4 are fixedly connected with symmetrically distributed mounting seats 11, and the interior of the mounting seats 11 is provided with symmetrically distributed mounting holes. The system includes an adjustment seat 7, which is rotatably connected to the middle of the front surface of the upper shock absorber 4. An adjustment seat 8 is rotatably connected to the upper end of the lower movable frame 6. A shock absorber 9 is provided between the adjustment seat 7 and the adjustment seat 8. During use, since the movable frame 6 is rotatably connected to the support 5, the movable frame 6 rotates with the vibration during vehicle movement, and at the same time, it squeezes the piston end of the shock absorber 9. The piston rod of the shock absorber 9 extends and retracts, thereby absorbing the mechanical energy generated by the vibration and reducing the overall vibration of the vehicle. Among them: the lower end of the drive seat 39 is rotatably connected to a rotating ring 12. The lower end of the rotating ring 12 and the outer arc surface of the vertically adjacent connecting cylinder 31 are fixedly connected to a rubber sealing sleeve 13. The rubber sealing sleeve 13 is rotatably connected to the corresponding drive seat 39 through the adjacent rotating ring 12, providing protection for the drive cylinder 36 itself and the connection between the drive cylinder 36 and the corresponding connecting cylinder 31, so as to avoid affecting the connection performance of the external thread. The upper surface of the upper connecting seat 23 and the lower surface of the upper shock absorber 4 are fixedly connected to the lower surface of the lower connecting seat 23 and the upper surface of the lower shock absorber 4. The rubber sleeves are all fitted on the outer surface of the adjacent screw 22. The rubber sleeves move and expand with the movement of the corresponding shock absorber 4, providing all-round protection for the screw 22 and the connection between the screw 22 and the corresponding internal thread cylinder 21.

[0018] The working principle of the adjustable car shock absorber bracket provided by this utility model is as follows: During operation, the operator rotates the two internal threaded cylinders 21 sequentially according to the installation requirements of the vehicle frame. The rotation of the internal threaded cylinders 21 causes the vertically adjacent screws 22 to move closer to the support frame 1. The movement of the screws 22 drives the corresponding shock absorber rods 4 to move closer to the support frame 1, thereby adjusting the distance between the two shock absorber rods 4 and simultaneously adjusting the distance between the mounting seats 11. During the rotation of the internal threaded cylinders 21, because the connecting seat 23 is slidably connected to the limiting ring, the connecting seat 23 will not rotate with the internal threaded cylinders 21 under the limiting action of the connecting rod 26. When the shock absorber rods 4 move closer to the support frame 1, the sliding seats 25... The sliding seat 25 moves outward from the center of the support frame 1 within the adjacent sliding groove 24, causing the upper end of the vertically adjacent connecting rod 26 to move away from the center of the support frame 1. Simultaneously, the end of the connecting rod 26 closest to the center of the support frame 1 rotates outward. The internal threaded cylinder 21, screw 22, connecting rod 26, and shock absorber 4 always form a triangular structure, providing stable support for the shock absorber 4 in different positions and ensuring the overall stability of the vehicle shock absorber bracket. When the shock absorber 4 reaches the desired position, the operator stops rotating the internal threaded cylinder 21, and then uses bolts to stably connect the mounting hole inside the mounting seat 11 to the threaded hole in the vehicle frame, thereby achieving a stable connection of the shock absorber bracket. Meanwhile, the external axle passes through the bearing seat 10. The outer surface of the external axle is rotatably connected to the inside of the bearing housing 10 under the action of the bearing. Then, the shock absorber 9 is installed between the adjusting seat 1 7 and the adjusting seat 2 8. Then, the corresponding ends of the external hub frame are inserted into the corresponding connecting cylinders 31. Then, the driving seat 39 is rotated, and the rotation of the driving seat 39 drives the vertically adjacent driving cylinders 36 to rotate. Since the external thread 38 is threadedly connected to the internal thread inside the corresponding connecting cylinder 31, the driving cylinders 36 move towards the center of the support frame 1 inside the corresponding connecting cylinder 31. The conical surface inside the driving cylinder 36 comes into contact with the inclined surface at the upper end of the limiting plate 34 and is squeezed, so that the limiting plate 34 moves towards the center inside the corresponding sliding groove 2 33. The movement of the center of the adjacent connecting cylinder 31 allows the end of the limiting plate 34 near the center of the support frame 1 to stably clamp the corresponding end of the external wheel hub frame, improving the tightness of the connection between the external wheel hub frame and the car shock absorber bracket. At the same time, the arc-shaped surface 35 of the limiting plate 34 provides space for the positional changes of the external wheel hub frame during the movement of the car, avoiding the rigid connection between the external wheel hub frame and the car shock absorber bracket from affecting the car's shock absorption performance. During use, since the movable frame 6 is rotatably connected to the support 5, the movable frame 6 rotates with the vibration during the movement of the vehicle, and at the same time, it squeezes the piston end of the shock absorber 9. The piston rod of the shock absorber 9 extends and retracts, thereby absorbing the mechanical energy generated by the vibration and reducing the overall vibration of the vehicle.

[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An adjustable car shock absorber bracket, comprising a support frame (1), wherein shock absorber rods (4) are provided at both the upper and lower ends of the support frame (1), characterized in that: It also includes an adjustment mechanism (2) and a connecting mechanism (3); Adjustment mechanism (2): It includes an internal threaded cylinder (21) and a screw (22). The internal threaded cylinder (21) is rotatably connected to the upper and lower ends of the support frame (1) through bearings. The screw (22) is fixedly connected to the middle of the inner surfaces of two opposite shock-absorbing rods (4). The outer surface of the screw (22) is threadedly connected to the internal threads of the vertically adjacent internal threaded cylinder (21). The connecting mechanism (3) includes a connecting cylinder (31), a partition (32), a second sliding groove (33), and a limiting plate (34). The connecting cylinder (31) is respectively located at the front end of the shock absorber (4). The partition (32) is fixedly connected inside the connecting cylinder (31). The partition (32) is provided with evenly distributed second sliding grooves (33) inside the partition (32). The limiting plate (34) is slidably connected inside the second sliding groove (33).

2. The adjustable automotive shock absorber bracket according to claim 1, characterized in that: The adjustment mechanism (2) further includes a connecting seat (23), a first slide groove (24), a sliding seat (25), and a connecting rod (26). The first slide groove (24) is symmetrically arranged on the opposite inner surfaces of the two damping rods (4). The sliding seat (25) is slidably connected inside the first slide groove (24). The outer surface of the connecting cylinder (31) is fixedly connected to a limiting ring. The outer surface of the limiting ring is slidably connected to the interior of the horizontally adjacent connecting seat (23). The end of the sliding seat (25) near the support frame (1) is rotatably connected to a connecting rod (26). The end of the connecting rod (26) near the center of the support frame (1) is rotatably connected to the outer arc surface of the adjacent connecting seat (23).

3. An adjustable automotive shock absorber bracket according to claim 2, characterized in that: The connecting mechanism (3) further includes an arc-shaped surface (35), a drive cylinder (36), a conical surface (37), an external thread (38), and a drive seat (39). The outer surface of the drive cylinder (36) is provided with an external thread (38). The inner wall of the connecting cylinder (31) away from the support frame (1) is provided with an internal thread. The internal threads are threaded to the vertically adjacent external threads (38). The six limiting plates (34) located inside the same connecting cylinder (31) are provided with an arc-shaped surface (35) at the end of their inner surface closest to the support frame (1). The six limiting plates (34) located inside the same connecting cylinder (31) are provided with an inclined surface at the end of their outer surface away from the support frame (1). The inner wall of the drive cylinder (36) is provided with a conical surface (37). The two connecting cylinders (31) are fixedly connected to the end away from the support frame (1) with a drive seat (39).

4. An adjustable automotive shock absorber bracket according to claim 1, characterized in that: The front surface of the shock absorber (4) is fixedly connected with symmetrically distributed supports (5). The interior of the two supports (5) located on the same horizontal plane is rotatably connected to the rear end of the same movable frame (6). The front end of the movable frame (6) is fixedly connected to the outer surface of the longitudinally adjacent connecting cylinder (31).

5. An adjustable automotive shock absorber bracket according to claim 4, characterized in that: It also includes an adjustment seat one (7), which is rotatably connected to the middle of the front surface of the upper shock absorber rod (4), and the upper end of the lower movable frame (6) is rotatably connected to an adjustment seat two (8). A shock absorber (9) is provided between the adjustment seat one (7) and the adjustment seat two (8).

6. An adjustable automotive shock absorber bracket according to claim 1, characterized in that: The support frame (1) is provided with a bearing seat (10) inside, and the rear ends of the two shock absorber rods (4) are fixedly connected with symmetrically distributed mounting seats (11), and the mounting seats (11) are provided with symmetrically distributed mounting holes inside.

7. An adjustable automotive shock absorber bracket according to claim 3, characterized in that: The lower end of each drive seat (39) is rotatably connected to a rotating ring (12). A rubber sealing sleeve (13) is fixedly connected between the lower end of the rotating ring (12) and the outer arc surface of the vertically adjacent connecting cylinder (31). A rubber sleeve is fixedly connected between the upper surface of the upper connecting seat (23) and the lower surface of the upper shock absorber (4) and the lower surface of the lower connecting seat (23) and the upper surface of the lower shock absorber (4). The rubber sleeves are all fitted on the outer surface of the adjacent screw (22).

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