Split type guider structure of single-cylinder shock absorber

Abstract

The utility model provides a split type guider structure of a single-cylinder shock absorber, which comprises a guide sleeve, the guide sleeve comprises a through piston rod mounting hole, a mounting cylinder is arranged in the piston rod mounting hole, a first mounting groove is arranged on the side wall of the mounting cylinder, the diameter of the first mounting groove is larger than that of the mounting cylinder, and a sealing piece is arranged in the first mounting groove. A second installation groove is formed between the side face, away from the sealing piece, of the installation cylinder and the side face, away from the sealing piece, of the guide sleeve, a dustproof seal is arranged in the second installation groove, and a limiting piece is arranged on one side of the dustproof seal or the sealing piece and used for limiting the dustproof seal or the sealing piece. Compression-free folding is achieved, dependence on a high-precision tool is eliminated, the installation difficulty is lowered, the risk that a sealing piece is damaged due to improper installation is reduced, and the assembly efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of guider, concretely relates to a single cylinder shock absorber split type guider structure. BACKGROUND

[0002] The single cylinder shock absorber guider is a vital component in the suspension system, and its core function is to guide the linear motion of the piston rod, support the lateral load and ensure the sealing of the hydraulic oil.

[0003] In the prior art, the single cylinder shock absorber usually uses an integrated guider, which integrates the guiding function and the sealing function in a single component, thereby realizing the compactness of the internal structure of the shock absorber and the improvement of the assembly efficiency.

[0004] However, the installation of the integrated guider seal is difficult, and the dust seal and the seal are folded (compressed by a special tool) and installed into the guide sleeve, which requires high precision of the installation tool and operation method, thereby reducing the installation rate, and the compression deformation process may cause the dust seal flange to break and the seal ring to break, forming a sealing failure hazard. INVENTION CONTENTS

[0005] Therefore, the utility model provides a single cylinder shock absorber split type guider structure, which can disperse the seal in the independent groove body through the split type structure, free from compression folding, free from dependence on high-precision tools, reduce the installation difficulty, reduce the risk of damage to the seal due to improper installation, and greatly improve the assembly efficiency.

[0006] To solve the above technical problems, the utility model provides a single cylinder shock absorber split type guider structure, which comprises a guide sleeve, the guide sleeve comprises a through piston rod mounting hole, the piston rod mounting hole is provided with a mounting cylinder, the mounting cylinder and the guide sleeve are integrally formed by turning machining when being manufactured, and a first mounting groove is formed in the side wall of the mounting cylinder.

[0007] The seal is connected in the first mounting groove through interference fit, the interference fit makes the inner and outer rings bear uniformly, and can avoid the seal from coming out of the first mounting groove during work, the diameter of the first mounting groove is greater than that of the mounting cylinder, so that the seal can be stored in the first mounting groove.

[0008] A limiting piece is arranged on one side of the seal, a third mounting groove is formed between the side surface of the mounting cylinder close to the seal and the side surface of the guide sleeve close to the seal, the limiting piece comprises a bearing seat arranged in the third mounting groove, the bearing seat is arranged to axially limit the seal, and the bearing seat is connected in the third mounting groove through interference fit, which can avoid the bearing seat from coming out of the third mounting groove during work.

[0009] The inner diameter of the third mounting groove is larger than that of the first mounting groove, so that the end surface of the bearing seat directly abuts against one side end surface of the sealing element, and under the working conditions of vibration, high pressure and the like, the sealing element is prevented from sliding to the piston rod direction due to axial force (such as hydraulic impact), thereby avoiding sealing failure.

[0010] The bearing seat is provided with a mounting cavity on the side away from the sealing element, the mounting cavity can be integrally formed with the bearing seat by turning during manufacturing, a bushing is arranged in the mounting cavity, and an inner hole of the bushing is coaxially arranged with the bearing seat, so as to ensure linear movement of the piston rod and reduce eccentric wear.

[0011] The bushing is preferably an SF1 bushing, which is usually composed of a metal base (such as a steel back) and a self-lubricating material (such as a polytetrafluoroethylene composite material), has excellent compressive strength and lateral load capacity, and is used to stably support the piston rod.

[0012] A second mounting groove is formed between the side surface of the mounting cylinder away from the sealing element and the side surface of the guide sleeve away from the sealing element, a dust seal is connected in the second mounting groove through interference fit, the interference fit makes the inner and outer rings bear force uniformly and can prevent the dust seal from coming out of the second mounting groove during work.

[0013] The limiting piece includes a limiting groove formed on the inner side wall of the second mounting groove, and a flat check ring is installed in the limiting groove, the flat check ring can be deformed by pinching, and after deformation, it can be installed into the limiting groove.

[0014] The beneficial effects of the above technical scheme of the utility model are as follows:

[0015] 1. Significantly improve the installation efficiency: the split structure disperses the sealing elements such as the sealing element and the dust seal in the independent groove body (the first and second mounting grooves), without the need for compression and folding operation, and without the need for relying on high-precision special tools, thereby reducing the installation difficulty, reducing the risk of damage to the sealing element due to improper installation, and greatly improving the assembly efficiency.

[0016] 2. Enhance the sealing reliability: the interference fit design makes the sealing element, the dust seal and the bearing seat stably embedded in the corresponding mounting groove, ensures that the contact pressure of the sealing element (the sealing element, the dust seal and the like) and the piston rod is uniform, avoids displacement of the sealing element and breakage of the slip ring due to vibration or hydraulic impact, and effectively resists the hydraulic impact force through the axial limitation of the bearing seat in the third mounting groove, thereby ensuring long-term stability of the sealing.

[0017] 3. Prolong the service life of the components: the combination design of the SF1 bushing and the bearing seat can efficiently bear the lateral load, ensure the linear movement of the piston rod, and reduce eccentric wear; the dust seal is axially limited by the flat check ring, prevents interface wear caused by sand and dust invasion, avoids the wear of the sealing element and the piston rod caused by impurity pollution, and significantly prolongs the overall service life of the guide.

[0018] 4. Reduce maintenance cost: when a component (such as dustproof seal or seal) is damaged, can be individually replaced without the need for overall replacement of the guide, reduce maintenance cost and downtime, improve the economy of after-sales maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole structure schematic view of the utility model;

[0020] Figure 2 It is the whole cross section structure schematic view of the utility model;

[0021] Figure 3 It is the guide sleeve and the structure schematic view of each part on it of the utility model;

[0022] Figure 4 It is the structure schematic view of the other side guide sleeve and each part on it of the utility model;

[0023] Figure 5 It is the structure schematic view of the other side of the utility model;

[0024] Figure 6 It is the structure schematic view of the local part of the utility model;

[0025] Figure 7 It is the structure schematic view of the bearing seat of the utility model.

[0026] In the drawing: 101, guide sleeve; 102, piston rod mounting hole; 103, installation cylinder; 104, first installation groove; 105, seal; 106, second installation groove; 107, dustproof seal;

[0027] 201, third installation groove; 202, bearing seat;

[0028] 301, installation cavity; 302, bushing;

[0029] 401, limiting groove; 402, flat baffle ring. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, the following will combine the drawing of the embodiment of the utility model to make the purpose, technical scheme and advantage of the embodiment of the utility model more clear, Figures 1-7 The technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by the person skilled in the art belong to the scope of the utility model protection.

[0031] A single cylinder shock absorber split type guide structure, such as Figure 1 , 2, 6 shown: including the guide sleeve 101, the guide sleeve 101 including the piston rod mounting hole 102, the piston rod mounting hole 102 is provided with the mounting cylinder 103, the mounting cylinder 103 is integrally formed with the guide sleeve 101 by turning when manufacturing, improve the structural strength and the anti-vibration, make the mounting cylinder 103 and the guide sleeve 101 have no relative displacement under working condition.

[0032] The first installation groove 104 is formed on the side wall of the mounting cylinder 103, and the sealing element 105 is connected in the first installation groove 104 by interference fit (the sealing element 105 uses a stefen, which is a combined sealing element, usually composed of rubber elastomer and sliding ring, used for sealing the gap between the piston rod and the guide sleeve 101, to prevent the hydraulic oil in the shock absorber from leaking), the interference fit makes the inner and outer rings of the sealing element 105 bear evenly, and can avoid the sealing element 105 from coming out of the first installation groove 104 during work, so as to ensure that the contact pressure of the sealing element 105 and the piston rod is evenly distributed, improve the sealing reliability, reduce the risk of leakage, the diameter of the first installation groove 104 is larger than the diameter of the mounting cylinder 103, so that the sealing element 105 can be stored in the first installation groove 104, and the inner diameter of the sealing element 105 is equal to the inner diameter of the mounting cylinder 103, to avoid affecting the normal work of the piston rod.

[0033] As shown in Figure 2 , 3 , 6 shown: the sealing element 105 is provided with a limiting piece, the third installation groove 201 is formed between the side surface of the mounting cylinder 103 close to the sealing element 105 and the side surface of the guide sleeve 101 close to the sealing element 105, the limiting piece includes a bearing seat 202 arranged in the third installation groove 201, the bearing seat 202 is arranged to limit the axial position of the sealing element 105, so as to prevent the axial movement of the sealing element 105, ensure the stability of the sealing position, and share the axial load to protect the sealing element 105, avoid plastic deformation or fatigue fracture due to long-term axial stress, prolong the service life of the sealing element 105.

[0034] The bearing seat 202 is connected in the third installation groove 201 by interference fit, which can prevent the bearing seat 202 from coming out of the third installation groove 201 during long-term work, so that the bearing seat 202 can bear the axial force (such as hydraulic impact) and radial bending moment (such as piston rod eccentric load) only by friction, and avoid loosening of the bearing seat 202 in high-frequency vibration or pressure fluctuation.

[0035] The inner diameter of the third installation groove 201 is larger than the inner diameter of the first installation groove 104, so that the end face of the bearing seat 202 directly abuts against one side end face of the sealing element 105, and under the working conditions of vibration, high pressure, etc., the sealing element 105 is prevented from sliding to the piston rod direction due to axial force (such as hydraulic impact), which causes sealing failure.

[0036] As Figure 1 , 2 , 7: the bearing seat 202 is provided with a mounting cavity 301 away from the seal 105 side, the mounting cavity 301 can be integrated with the bearing seat 202 by turning when manufacturing, the mounting cavity 301 is provided with a bushing 302 (the bushing 302 is installed in the inner wall of the bearing seat 202, used to bear the lateral load when the shock absorber works, guide the linear motion of the piston rod and reduce the friction, avoid the piston rod from eccentric wear and tear), the inner hole of the bushing 302 is coaxially arranged with the bearing seat 202, used to ensure the linear motion of the piston rod and reduce the eccentric wear and tear.

[0037] The bushing 302 is preferably SF1 bushing 302, which is usually composed of metal matrix (such as steel back) and self-lubricating material (such as polytetrafluoroethylene composite material), with excellent compressive strength and lateral load capacity, used to stably support the piston rod, avoid the deformation of the bushing 302 or the deviation of the piston rod due to excessive load, reduce the eccentric wear and tear of the piston rod and the seal, and improve the service life of the components.

[0038] As Figure 2 , 4 , 5, 6: the mounting cylinder 103 is formed with a second mounting groove 106 on the side away from the seal 105 and the side away from the seal 105 of the guide sleeve 101, the second mounting groove 106 is connected with a dust seal 107 through interference fit (the dust seal 107 is used to block the dust, sand and other impurities from entering the shock absorber, avoid the surface of the piston rod from being contaminated and aggravate the wear and tear), the interference fit makes the stress of the inner and outer rings uniform and can avoid the dust seal 107 from coming out of the second mounting groove 106 during work, the interference fit of the dust seal 107 ensures that there is no gap between the dust seal 107 and the second mounting groove 106, avoids the sand and dust from wedging and causing interface wear and tear, and causes vicious cycle of gap expansion.

[0039] The limiting piece includes a limiting groove 401 opened on the inner side wall of the second mounting groove 106, a flat check ring 402 is installed in the limiting groove 401, the flat check ring 402 is arranged close to the dust seal 107 on the side facing the dust seal 107, improves the limiting effect of the dust seal 107, the flat check ring 402 can be deformed by pinching, and after deformation, it can be installed into the limiting groove 401, and after installation into the limiting groove 401, it restores to the original state, if complex tools are needed, the installation can be realized, the assembly rate is improved, and the flat check ring 402 is installed in the limiting groove 401 in the second mounting groove 106, which can axially limit the dust seal 107, prevent it from axially moving or coming out due to factors such as vibration and pressure fluctuation during work, and ensure the stable position of the dust seal 107.

[0040] In addition, it needs to be explained that, in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles described in the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A single-tube shock absorber split guide structure, comprising a guide sleeve (101) comprising a through piston rod mounting hole (102), characterized in that: a mounting cylinder (103) is arranged in the piston rod mounting hole (102), a first mounting groove (104) is formed in the side wall of the mounting cylinder (103), the diameter of the first mounting groove (104) is greater than the diameter of the mounting cylinder (103), and a sealing element (105) is arranged in the first mounting groove (104); a second mounting groove (106) is formed between the side of the mounting cylinder (103) away from the sealing element (105) and the side of the guide sleeve (101) away from the sealing element (105), and a dust seal (107) is arranged in the second mounting groove (106); a limiting piece is arranged on one side of the dust seal (107) or the sealing element (105) for limiting the dust seal (107) or the sealing element (105). A limiting piece is arranged on one side of the dust seal (107) and the sealing element (105) for limiting the dust seal (107) and the sealing element (105). A third mounting groove (201) is formed between the side of the mounting cylinder (103) close to the sealing element (105) and the side of the guide sleeve (101) close to the sealing element (105), and the inner diameter of the third mounting groove (201) is greater than the inner diameter of the first mounting groove (104). The limiting piece comprises a bearing seat (202) arranged in the third mounting groove (201) for axially limiting the sealing element (105).

2. The monoblock shock absorber split guide structure of claim 1, wherein: An installation cavity (301) is formed in the side of the bearing seat (202) away from the sealing element (105), a bushing (302) is arranged in the installation cavity (301), and the inner hole of the bushing (302) is coaxially arranged with the bearing seat (202).

3. The monoblock shock absorber split guide structure of claim 2, wherein: The limiting piece comprises a limiting groove (401) formed in the inner side wall of the second mounting groove (106), and a flat collar (402) is arranged in the limiting groove (401). The sealing element (105) is connected in the first mounting groove (104) through interference fit, the dust seal (107) is connected in the second mounting groove (106) through interference fit, and the bearing seat (202) is connected in the third mounting groove (201) through interference fit.

4. The monoblock shock absorber split guide structure of claim 3, wherein: The bushing (302) is an SF1 bushing (302) for stably supporting the piston rod and avoiding deformation of the bushing (302) or deviation of the piston rod due to excessive load.

5. The monoblock shock absorber split guide structure of claim 4, wherein: ​ 6. The monoblock shock absorber split guide structure of claim 5, wherein: ​ 7. The monoblock shock absorber split guide structure of claim 4 wherein: ​

Images