Limiting structure of automobile shock absorber

Abstract

The invention relates to a limiting structure of an automobile shock absorber, and belongs to the technical field of automobile chassis, the limiting structure comprises a shock absorber body, a protective groove seat is arranged at the position, located in a working cylinder of the shock absorber body, of a piston rod of the shock absorber body, the protective groove seat is in movable contact with the inner wall of the working cylinder, and an elastic seat is arranged on the piston rod. The outer wall of the elastic base is in sliding connection with the groove wall of the protection groove base, and an oil storage cavity is formed by an inner cavity of the protection groove base and the elastic base. Oil in the main oil cavity flows out through the first damping hole and generates damping force, the descending speed of wheels is reduced, when the elastic base makes contact with a guider of the shock absorber body, oil in the oil storage cavity is compressed and flows out through the second damping hole, damping force is generated, and impact is further reduced. By means of double buffering, abnormal sound caused by impact is reduced, the riding comfort and quality are improved, and the service life of the shock absorber is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile chassis, and in particular relates to a limiting structure of an automobile shock absorber. Background Art

[0002] On most vehicles currently on the market, the primary mechanism for limiting wheel bounce during driving is the shock absorber's rebound limiter. However, in practice, due to long periods of driving, especially on uneven roads, the rebound limiter is frequently impacted, which can easily damage the shock absorber. Furthermore, these intense impacts not only produce unusual noises but also create an uncomfortable experience for passengers, leading to complaints from after-sales service providers.

[0003] Therefore, in order to solve this problem, shock absorber limit limits have appeared on the market. However, the structure of this limit limit will suddenly stop when encountering an impact. The impact force is very large and cannot absorb a large amount of impact force, which will still bring an uncomfortable experience to passengers. Summary of the Invention

[0004] In response to the above problems, the present invention provides a limiting structure for an automobile shock absorber. When the shock absorber encounters a large impact condition, the limiting structure can mitigate the impact and also reduce the abnormal noise caused by the impact, thereby improving the comfort and quality of riding.

[0005] A limiting structure for an automobile shock absorber comprises a shock absorber body, a piston rod of the shock absorber body being located in a working cylinder of the shock absorber body and being provided with a protective groove seat, the protective groove seat being in movable contact with an inner wall of the working cylinder, an elastic seat being provided on the piston rod, an outer wall of the elastic seat being in sliding connection with a groove wall of the protective groove seat, an inner cavity of the protective groove seat and the elastic seat constituting an oil storage cavity, a space between the protective groove seat and a guide of the shock absorber body of the working cylinder being a main oil cavity, a first damping hole being provided on the protective groove seat and being connected to the main oil cavity, a second damping hole being provided on the elastic seat, and both the main oil cavity and the oil storage cavity being connected to the second damping hole.

[0006] Furthermore, the working cylinder vertically includes a connecting portion, a transition portion and an accommodating portion connected in sequence, the protection groove seat is in active contact with the transition portion, and the connecting portion is connected to the guide of the shock absorber body.

[0007] Furthermore, the diameter of the connecting portion is smaller than the diameter of the accommodating portion.

[0008] Furthermore, the transition portion vertically includes a concave arc portion and a convex arc portion connected in sequence, and the concave arc portion is in active contact with the outer wall of the protection groove seat.

[0009] Furthermore, the elastic seat includes a groove body and an elastic member, the groove body is provided on the piston rod, the inner cavity of the groove body and the inner cavity of the protective groove seat constitute an oil storage cavity, and the elastic member is provided in the oil storage cavity.

[0010] Furthermore, a second damping hole is provided on the trough body.

[0011] Furthermore, the protection groove seat includes a seat body and a sealing ring, the seat body is arranged on the piston rod, and a sealing ring is provided on the outer wall of the seat body, and the sealing ring is in active contact with the inner wall of the working cylinder.

[0012] Furthermore, a first damping hole is provided on the seat body.

[0013] Furthermore, the seat body includes a mounting portion and a base portion arranged in sequence vertically, the mounting portion is provided with a first damping hole penetrating the base portion, and a sealing ring is provided on the outer wall of the mounting portion.

[0014] Furthermore, a retaining spring in contact with the protective groove seat is provided at a portion of the piston rod away from the elastic seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The oil in the main oil chamber of this invention flows out through the first damping orifice, generating a damping force that slows the wheel's downward speed. When the elastic seat contacts the guide of the shock absorber body, the oil in the reservoir is compressed and flows out through the second damping orifice, generating a damping force that further mitigates impact. This dual cushioning not only reduces the noise caused by impact, but also improves ride comfort and quality, and ensures the service life of the shock absorber.

[0016] In the present invention, when the shock absorber body moves upward, the elastic seat is reset, so that the oil in the oil storage chamber is replenished through the second damping hole and is ready for the next impact.

[0017] According to the present invention, when the automobile wheel continues to descend, the oil in the main oil chamber flows out through the first damping hole, and at the same time the outer wall of the protective groove seat contacts the inner wall of the working cylinder, and the main oil chamber is in a closed state. When the automobile wheel continues to descend, the oil in the main oil chamber flows out through the first damping hole again and generates a damping force, thereby reducing the stretching speed and alleviating the impact.

[0018] The transition portion of the present invention can increase the smoothness of transition during buffering and improve the driving stability of the vehicle.

[0019] In the present invention, the oil in the oil storage chamber flows out through the second damping hole, which can further increase the damping force of the oil and improve the mitigation effect. At the same time, it can also prevent the elastic seat and the guide of the shock absorber body from violently impacting and generating abnormal noise.

[0020] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram showing a limiting structure of an automobile shock absorber; Figure 2 Shows a schematic diagram of the connection between the elastic seat, the protective groove seat and the piston rod; Figure 3 A schematic diagram showing the contact between the sealing ring and the concave arc portion is shown.

[0023] Figure numerals: 1. shock absorber body; 11. piston rod; 12. guide; 13. working cylinder; 131. connecting part; 132. transition part; 1321. concave arc part; 1322. convex arc part; 133. accommodating part; 14. main oil chamber; 2. protective groove seat; 21. seat body; 211. mounting part; 212. base part; 22. sealing ring; 23. first damping hole; 3. elastic seat; 31. groove body; 32. elastic member; 33. second damping hole; 4. oil storage chamber; 5. retaining spring. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] Figure 1 The figure shows a schematic diagram of the limiting structure of the automobile shock absorber. Figure 1 As shown, a limiting structure of a car shock absorber includes a shock absorber body 1, a piston rod 11 of the shock absorber body 1 is located in the working cylinder 13 of the shock absorber body 1 and is provided with a protective groove seat 2, and the protective groove seat 2 is in active contact with the inner wall of the working cylinder 13. Figure 2 The figure shows the connection diagram of the elastic seat 3, the protective groove seat 2 and the piston rod 11. Figure 2As shown, an elastic seat 3 is provided on the piston rod 11, and the outer wall of the elastic seat 3 is slidably connected to the groove wall of the protective groove seat 2. The inner cavity of the protective groove seat 2 and the elastic seat 3 constitute an oil storage chamber 4. The space between the working cylinder 13 and the guide 12 of the shock absorber body 1 is the main oil chamber 14. The protective groove seat 2 is provided with a first damping hole 23 connected to the main oil chamber 14, and the elastic seat 3 is provided with a second damping hole 33. The main oil chamber 14 and the oil storage chamber 4 are both connected to the second damping hole 33.

[0026] The oil in the main oil chamber 14 of the vehicle's shock absorber's limiting structure flows out through the first damping orifice 23, generating a damping force that slows the wheel's downward speed. When the elastic seat 3 contacts the shock absorber's guide 12, the oil in the oil reservoir 4 is compressed and flows out through the second damping orifice 33, generating a damping force that further mitigates impact. This dual cushioning not only reduces noise caused by impact, but also improves ride comfort and quality, and ensures the shock absorber's service life.

[0027] Specifically, the inner diameter of the working cylinder 13 is ≥32 mm, which facilitates the normal operation of the limiting structure in the working cylinder 13 .

[0028] Specifically, a plurality of first damping holes 23 are provided on the protection slot seat 2 .

[0029] Specifically, a plurality of second damping holes 33 are provided on the elastic seat 3 .

[0030] Specifically, Figure 1 The arrow at the middle piston rod 11 indicates the movement direction of the piston rod 11 ; the arrow at the second damping hole 33 indicates the flow direction of the oil in the main oil chamber 14 .

[0031] In some embodiments, the working cylinder 13 vertically includes a connecting portion 131, a transition portion 132 and an accommodating portion 133 connected in sequence, the protective groove seat 2 is in active contact with the transition portion 132, and the connecting portion 131 is connected to the guide 12 of the shock absorber body 1; the connecting portion 131 is used to connect with the guide 12 of the shock absorber body 1; the transition portion 132 is used to be in active contact with the outer wall of the protective groove seat 2, so that the main oil chamber 14 is in a closed state; the accommodating portion 133 is used to accommodate the limiting structure, the piston rod 11 and the oil.

[0032] In some embodiments, the diameter of the connecting portion 131 is smaller than the diameter of the accommodating portion 133 , so as to set the direction of the transition portion 132 and provide a closed condition for the main oil chamber 14 to be in a closed state.

[0033] Specifically, the space between the connecting portion 131 and the guide 12 of the shock absorber body 1 is the main oil chamber 14 .

[0034] In some embodiments, the transition portion 132 includes a concave arc portion 1321 and a convex arc portion 1322 connected in sequence vertically, and the concave arc portion 1321 is in active contact with the outer wall of the protection groove seat 2; the concave arc portion 1321 is used to be in active contact with the outer wall of the protection groove seat 2, so that the main oil chamber 14 is in a closed state; when the vehicle wheel continues to descend, the concave arc portion 1321 is in contact with the outer wall of the protection groove seat 2, and when the vehicle wheel continues to descend, the concave arc portion 1321 is separated from the outer wall of the protection groove seat 2, and the upward and downward movement of the vehicle wheel provides conditions for the concave arc portion 1321 to be in active contact with the outer wall of the protection groove seat 2.

[0035] In some embodiments, the elastic seat 3 includes a groove body 31 and an elastic member 32. The groove body 31 is provided on the piston rod 11. The inner cavity of the groove body 31 and the inner cavity of the protective groove seat 2 constitute an oil storage chamber 4. The oil storage chamber 4 is provided with an elastic member 32; the inner cavity of the groove body 31 provides the formation conditions for the oil storage chamber 4; when the shock absorber body 1 moves upward, the elasticity of the elastic member 32 is used to push the groove body 31 upward and reset it, so that the oil in the oil storage chamber 4 is replenished through the second damping hole 33 and prepared for the next impact.

[0036] Specifically, the elastic member 32 may be selected from but not limited to a return spring. The return spring is a prior art and will not be described in detail herein.

[0037] In some embodiments, a second damping hole 33 is provided on the groove body 31 to facilitate oil exchange between the main oil chamber 14 and the oil storage chamber 4, thereby generating a damping force, reducing the stretching speed of the shock absorber body 1, and mitigating impact.

[0038] In some embodiments, the protective groove seat 2 includes a seat body 21 and a sealing ring 22. The seat body 21 is arranged on the piston rod 11. The sealing ring 22 is provided on the outer wall of the seat body 21. The sealing ring 22 is in active contact with the inner wall of the working cylinder 13; the seat body 21 provides formation conditions for the oil storage chamber 4 and also provides installation conditions for the sealing ring 22; the sealing ring 22 provides sealing conditions for the main oil chamber 14.

[0039] In some embodiments, the sealing ring 22 is in movable contact with the concave arc portion 1321 ; the sealing ring 22 is used to be in movable contact with the concave arc portion 1321 , thereby keeping the main oil chamber 14 in a closed state.

[0040] In some embodiments, a first damping hole 23 is provided on the seat body 21 ; the first damping hole 23 facilitates the exchange of oil between the main oil chamber 14 and the accommodating portion 133 , thereby generating a damping force.

[0041] Figure 3 FIG. 2 shows a schematic diagram of the contact between the sealing ring 22 and the concave arc portion 1321. Figure 3 As shown, in some embodiments, the sealing ring 22 contacts the concave arc portion 1321 , thereby making the main oil chamber 14 sealed.

[0042] Specifically, Figure 3 The arrow at the first damping hole 23 indicates the flow direction of the oil in the oil storage chamber 4, and the arrow at the piston rod 11 indicates the movement direction of the piston rod 11; the arrow at the second damping hole 33 indicates the flow direction of the oil in the main oil chamber 14.

[0043] Specifically, the sealing ring 22 may be selected from but not limited to an O-type sealing ring 22. The O-type sealing ring 22 is a prior art and thus will not be described in detail herein.

[0044] In some embodiments, the seat body 21 includes a mounting portion 211 and a base portion 212 arranged in sequence vertically, the mounting portion 211 is provided with a first damping hole 23 that passes through the base portion 212, and a sealing ring 22 is provided on the outer wall of the mounting portion 211; the mounting portion 211 provides installation conditions for the sealing ring 22; the first damping hole 23 facilitates the exchange of oil in the main oil chamber 14 and the accommodating portion 133, thereby generating a damping force to slow down the downward speed of the wheel.

[0045] In some embodiments, the diameter of the base portion 212 is smaller than the diameter of the mounting portion 211 , thereby preventing the base portion 212 from contacting the transition portion 132 and providing more accommodation space for oil.

[0046] In some embodiments, a retaining spring 5 in contact with the protective groove seat 2 is provided at a portion of the piston rod 11 away from the elastic seat 3 ; the retaining spring 5 is used to provide resistance to prevent the protective groove seat 2 from falling.

[0047] Specifically, a retaining spring 5 is provided on the piston rod 11 and is fixed to the base portion 212 .

[0048] The working principle of the limiting structure of the automobile shock absorber is as follows: The oil flowing out through the first damping hole 23 and the second damping hole 33 generates a damping force, thereby achieving a double buffering effect. The double buffering not only reduces the abnormal noise caused by the impact of the wheel jumping down, but also improves the riding comfort and quality, and ensures the service life of the shock absorber body 1.

[0049] When the shock absorber body 1 stretches, the oil at the connection portion 131 flows into the accommodating portion 133 through the first damping hole 23 and the transition portion 132. Simultaneously, the sealing ring 22 on the protective groove seat 2 gradually contacts the concave arc portion 1321. Once this contact is complete, the main oil chamber 14 becomes sealed. As the shock absorber body 1 continues to descend, the oil in the main oil chamber 14 flows through the first damping hole 23 into the accommodating portion 133, generating a damping force that slows the wheel's downward speed. As the shock absorber body 1 continues to descend, the oil in the main oil chamber 14 decreases, and the groove 31 of the elastic seat 3 contacts the guide 12 of the shock absorber body 1. The oil in the oil reservoir 4 is compressed, and the oil flows into the main oil chamber 14 through the second damping hole 33, further generating a damping force and mitigating the impact. When the shock absorber body 1 moves upward, the oil in the accommodating portion 133 gradually enters the main oil chamber 14, and the sealing ring 22 separates from the concave arc portion 1321. At the same time, the elasticity of the elastic member 32 pushes the groove body 31 upward and resets it, so that the oil in the oil storage chamber 4 is replenished and prepared for the next impact.

[0050] Specifically, when the shock absorber body 1 is stretched, the wheels of the vehicle continue to move downward.

[0051] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A limiting structure of an automobile shock absorber, comprising a shock absorber body (1), characterized in that: A protective groove seat (2) is provided at a portion of the piston rod (11) of the shock absorber body (1) located in the working cylinder (13) of the shock absorber body (1), the protective groove seat (2) is in active contact with the inner wall of the working cylinder (13), an elastic seat (3) is provided on the piston rod (11), the outer wall of the elastic seat (3) is slidably connected to the groove wall of the protective groove seat (2), the inner cavity of the protective groove seat (2) and the elastic seat (3) constitute an oil storage chamber (4), the space between the protective groove seat (2) and the guide (12) of the shock absorber body (1) in the working cylinder (13) is a main oil chamber (14), a first damping hole (23) communicating with the main oil chamber (14) is provided on the protective groove seat (2), a second damping hole (33) is provided on the elastic seat (3), and both the main oil chamber (14) and the oil storage chamber (4) are communicated with the second damping hole (33).

2. The limiting structure of the automobile shock absorber according to claim 1, characterized in that: The working cylinder (13) vertically comprises a connecting portion (131), a transition portion (132) and an accommodating portion (133) connected in sequence, the protective groove seat (2) is in active contact with the transition portion (132), and the connecting portion (131) is connected to the guide (12) of the shock absorber body (1).

3. The limiting structure of the automobile shock absorber according to claim 2, characterized in that: The diameter of the connecting portion (131) is smaller than the diameter of the accommodating portion (133).

4. The limiting structure of the automobile shock absorber according to claim 2, characterized in that: The transition portion (132) vertically comprises a concave arc portion (1321) and a convex arc portion (1322) connected in sequence, and the concave arc portion (1321) is in active contact with the outer wall of the protection groove seat (2).

5. The limiting structure of the automobile shock absorber according to claim 1, characterized in that: The elastic seat (3) comprises a groove body (31) and an elastic member (32). The groove body (31) is provided on the piston rod (11). The inner cavity of the groove body (31) and the inner cavity of the protective groove seat (2) form an oil storage cavity (4). The elastic member (32) is provided in the oil storage cavity (4).

6. The limiting structure of the automobile shock absorber according to claim 5, characterized in that: A second damping hole (33) is provided on the trough body (31).

7. The limiting structure of the automobile shock absorber according to claim 1, characterized in that: The protective groove seat (2) comprises a seat body (21) and a sealing ring (22). The seat body (21) is arranged on the piston rod (11). The sealing ring (22) is provided on the outer wall of the seat body (21). The sealing ring (22) is in active contact with the inner wall of the working cylinder (13).

8. The limiting structure of the automobile shock absorber according to claim 7, characterized in that: The seat body (21) is provided with a first damping hole (23).

9. The limiting structure of the automobile shock absorber according to claim 7, characterized in that: The seat body (21) includes a mounting portion (211) and a base portion (212) arranged in sequence vertically. The mounting portion (211) is provided with a first damping hole (23) penetrating the base portion (212). A sealing ring (22) is provided on the outer wall of the mounting portion (211).

10. The limiting structure of the automobile shock absorber according to any one of claims 1 to 9, characterized in that: A retaining spring (5) in contact with the protective groove seat (2) is provided at a portion of the piston rod (11) away from the elastic seat (3).

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