Finish rolling seamless steel pipe for piston rod of shock absorber

Abstract

The utility model relates to the technical field of metal pipes, in particular to a finish rolling seamless steel pipe for a damper piston rod, which comprises a piston steel pipe and a top cover, the piston steel pipe is made of finish rolling process alloy structural steel, and the top cover is connected with the top of the piston steel pipe through a plurality of screws. The piston main body is arranged in the piston steel pipe, the top of the piston main body is fixedly connected with the piston rod main body, the top of the piston rod main body penetrates through the top cover, the two sealing rings are embedded in the outer side piston main body, and the finish rolling wear-resisting layer is arranged on the inner wall of the piston steel pipe and is formed by an alloy material with high hardness in an electroplating mode. And the sealing ring is in contact with the finish rolling wear-resistant layer. The utility model has the beneficial effects that the piston main body is contacted with the finish rolling wear-resistant layer made of alloy material with higher hardness through the sealing ring, so that the dimensional precision of the steel pipe is greatly improved, the requirement of high-precision assembly of a shock absorber can be met, and good matching between the piston main body and the piston steel pipe is ensured; compared with a traditional device, the operation quality and the use efficiency are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal tubular product technical field especially relates to a kind of precision-forged seamless steel pipes for shock absorber piston rod. BACKGROUND

[0002] Shock absorber is the core component in vehicle suspension system, mainly used to suppress the rebound impact after spring shock absorption and vibration from road, ensure the stability and comfort of vehicle driving.

[0003] Traditional seamless steel pipe has many deficiencies when used for shock absorber piston rod, on the one hand, its surface roughness is higher, in the reciprocating motion process of piston rod, it will increase the friction between sealing element, not only reduce the working efficiency of shock absorber, but also accelerate the wear of sealing element, cause shock absorber to leak oil, shorten service life, on the other hand, the dimensional accuracy of ordinary seamless steel pipe is limited, difficult to meet the requirement of high-precision assembly of shock absorber, easily cause the unevenness of the fit clearance between piston rod and shock absorber cylinder, affect the damping effect.

[0004] Aiming at the above problems, we launch a kind of precision-forged seamless steel pipe for shock absorber piston rod. CONTENT OF UTILITY MODEL

[0005] The utility model discloses a kind of precision-forged seamless steel pipes for shock absorber piston rod, to solve the technical problem in background art.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A kind of precision-forged seamless steel pipe for shock absorber piston rod, including piston steel pipe and top cap, the piston steel pipe adopts precision-forged process alloy structural steel, the top cap is connected with the top of piston steel pipe by multiple screws, still include: piston main body, the piston main body is arranged in the inside of piston steel pipe and top fixedly connected with piston rod main body, the top of piston rod main body penetrates top cap, two sealing rings, two The sealing ring is embedded in outer piston main body, precision-forged wear-resistant layer, the precision-forged wear-resistant layer is set in the inner wall of piston steel pipe, is formed by the electroplating mode of higher hardness alloy material, the sealing ring is contacted with precision-forged wear-resistant layer.

[0008] In the process of daily driving, when the car drives over the bumpy road, the vibration of the wheel is transmitted to the shock absorber, at this time, the piston rod body moves up and down with the piston body in the piston steel pipe, because the inner wall of the piston steel pipe has a finish rolling wear-resistant layer, which is in close contact with the sealing ring embedded on the outer side of the piston body, not only reduces the friction between the two, but also effectively prevents the leakage of internal hydraulic oil, when passing through a continuous deceleration zone, the piston rod body moves up and down frequently, the cooperation of the finish rolling wear-resistant layer and the sealing ring makes the movement of the piston body in the piston steel pipe smooth and smooth, which guarantees the normal work of the shock absorber and improves the driving comfort.

[0009] In a preferred scheme, the bottom of the piston steel pipe and the top of the piston rod body are fixedly connected with fixing plates, and the sides away from each other of the two fixing plates are fixedly connected with connecting heads.

[0010] In the installation process of the automobile shock absorption system, the workers connect the shock absorber with other parts of the automobile by using the connecting heads, the connecting head at the bottom of the piston steel pipe is connected with the corresponding part of the axle or the frame, and the connecting head at the top of the piston rod body is connected with the wheel suspension system and other components.

[0011] In a preferred scheme, the inside of the top cover is embedded with a sealing oil seal, and the piston rod body is used in cooperation with the sealing oil seal.

[0012] When the shock absorber works, the piston rod body continuously reciprocates in the top cover, the sealing oil seal is embedded in the inside of the top cover and tightly wraps the piston rod body, which plays a good sealing effect.

[0013] In a preferred scheme, the outside of the piston steel pipe is threadedly connected with an adjusting nut, and a compression spring is arranged outside the piston steel pipe and between the top of the adjusting nut and the bottom of one of the fixing plates.

[0014] When the automobile is refitted or the shock absorption performance is adjusted according to different road conditions, the pre-tightening force of the compression spring can be changed by adjusting the nut, when the automobile needs to cope with off-road conditions, the maintenance personnel rotates the adjusting nut to move it upward, the compression spring is further compressed, the pre-tightening force is increased, which can better absorb and buffer the larger impact force from the road, and protect the automobile chassis and suspension system.

[0015] In a preferred scheme, one side of the piston steel pipe is fixedly connected with a hydraulic oil pump, an output end of the hydraulic oil pump is fixedly connected with a connecting pipe, and the connecting pipe extends to the inside of the piston steel pipe away from the hydraulic oil pump.

[0016] When the shock absorber needs to adjust the damping quickly during the driving of the car, the hydraulic oil pump starts, and when the car is high-speed turning, the damping of the shock absorber needs to be increased to keep the body stable, at this time, the hydraulic oil pump injects additional hydraulic oil into the piston steel pipe through the connecting pipe, changes the hydraulic pressure difference on both sides of the piston main body, and thus increases the damping force of the shock absorber, and effectively inhibits the roll of the body.

[0017] In a preferred scheme, the outer surface of the piston steel pipe is provided with a surface treatment layer formed by a chemical nickel-phosphorus alloy plating process.

[0018] The piston steel pipe is exposed to the external environment and is easily eroded by rainwater, dust and various corrosive substances, and the surface treatment layer is formed by a chemical nickel-phosphorus alloy plating process and has good corrosion resistance and wear resistance.

[0019] The utility model provides a kind of precision-forged seamless steel pipe for shock absorber piston rod, which has the following advantages:

[0020] In the utility model, the piston rod main body moves up and down in the piston steel pipe along with the piston main body. Since the inner wall of the piston steel pipe has a precision-forged wear-resistant layer, it is in close contact with the sealing ring embedded on the outer side of the piston main body. This not only reduces the friction between the two, but also effectively prevents the internal hydraulic oil from leaking. When passing through a continuous deceleration zone, the piston rod main body moves up and down frequently, and the precision-forged wear-resistant layer cooperates with the sealing ring.

[0021] 1. The piston main body is in contact with the precision-forged wear-resistant layer made of high-hardness alloy material through the sealing ring, which greatly improves the dimensional accuracy of the steel pipe and meets the requirements of high-precision assembly of the shock absorber, ensuring good cooperation between the piston main body and the piston steel pipe.

[0022] 2. The chemical nickel-phosphorus alloy surface treatment layer effectively improves the corrosion resistance of the steel pipe, prolongs the service life of the steel pipe in complex environments, reduces the maintenance cost of the shock absorber, and greatly improves the operation quality and efficiency compared with traditional devices. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Figure 1 is a first perspective view of a precision-forged seamless steel pipe for a shock absorber piston rod according to the utility model.

[0024] Figure 2 Figure 2 is a second perspective view of a precision-forged seamless steel pipe for a shock absorber piston rod according to the utility model.

[0025] Figure 3 Figure 3 is a side view of a piston steel pipe of a precision-forged seamless steel pipe for a shock absorber piston rod according to the utility model.

[0026] Figure 4The utility model provides a kind of piston rod main body structure schematic diagram of shock absorber piston rod with precision rolled seamless steel pipe.

[0027] Figure 5 The utility model provides a kind of compression spring structure schematic diagram of shock absorber piston rod with precision rolled seamless steel pipe.

[0028] Figure 6 The utility model provides a kind of piston steel pipe overhead section view schematic diagram of shock absorber piston rod with precision rolled seamless steel pipe.

[0029] In the drawing: 1, piston steel pipe;2, top cap;3, piston main body;4, piston rod main body;5, sealing ring;6, precision rolling wear layer;7, surface treatment layer;8, fixed plate;9, connector;10, sealing oil seal;11, adjusting nut;12, compression spring;13, hydraulic oil pump;14, connecting pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and indicated in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] The utility model discloses a kind of shock absorber piston rod with precision rolled seamless steel pipe, it is mainly applied to the scene of metal pipe.

[0032] Referring Figures 1-6 A kind of shock absorber piston rod with precision rolled seamless steel pipe, including piston steel pipe 1 and top cap 2, piston steel pipe 1 adopts precision rolling process alloy structural steel, top cap 2 is connected with the top of piston steel pipe 1 by multiple screws, still include: piston main body 3, piston main body 3 is arranged in the inside of piston steel pipe 1 and top fixedly connected with piston rod main body 4, the top of piston rod main body 4 penetrates top cap 2, two sealing rings 5, two sealing rings 5 are all embedded in outside piston main body 3, precision rolling wear layer 6, precision rolling wear layer 6 is set in the inner wall of piston steel pipe 1, is formed by high hardness alloy material by electroplating mode, sealing ring 5 and precision rolling wear layer 6 are contacted.

[0033] In the daily driving process, when the car drives over the bumpy road, the vibration of the wheel is transmitted to the shock absorber, at this time, the piston rod body 4 moves up and down in the piston steel pipe 1 with the piston body 3, because the inner wall of the piston steel pipe 1 has a finish rolling wear-resistant layer 6, which is in close contact with the sealing ring 5 embedded on the outside of the piston body 3, not only reducing the friction between the two, but also effectively preventing the internal hydraulic oil from leaking, when passing through a continuous deceleration zone, the piston rod body 4 moves up and down frequently, the cooperation of the finish rolling wear-resistant layer 6 and the sealing ring 5 makes the movement of the piston body 3 in the piston steel pipe 1 smooth and smooth, which guarantees the normal work of the shock absorber and improves the driving comfort.

[0034] In a preferred embodiment, the bottom of the piston steel pipe 1 and the top of the piston rod body 4 are fixedly connected with the fixed plate 8, and the side away from each other of the two fixed plates 8 is fixedly connected with the connecting head 9.

[0035] In the installation process of the automobile shock absorption system, the worker connects the shock absorber with other parts of the automobile by the connecting head 9, the connecting head 9 at the bottom of the piston steel pipe 1 is connected with the corresponding part of the axle or the frame, and the connecting head 9 at the top of the piston rod body 4 is connected with the wheel suspension system and other components.

[0036] In a preferred embodiment, the inside of the top cover 2 is embedded with a sealing oil seal 10, and the piston rod body 4 is used in cooperation with the sealing oil seal 10.

[0037] In the working process of the shock absorber, the piston rod body 4 continuously reciprocates in the top cover 2, the sealing oil seal 10 is embedded in the inside of the top cover 2 and tightly wraps the piston rod body 4, which plays a good sealing effect.

[0038] In a preferred embodiment, the outside of the piston steel pipe 1 is threadedly connected with an adjusting nut 11, and the outside of the piston steel pipe 1 and between the top of the adjusting nut 11 and the bottom of one of the fixed plates 8 is sleeved with a compression spring 12.

[0039] In the process of automobile modification or adjustment of shock absorption performance according to different road conditions, the pre-tightening force of the compression spring 12 can be changed by adjusting the nut 11, when the car needs to cope with off-road conditions, the maintenance personnel rotates the adjusting nut 11 to move upward, the compression spring 12 is further compressed, the pre-tightening force is increased, which can better absorb and buffer the larger impact force from the road, and protect the automobile chassis and suspension system.

[0040] In a preferred embodiment, one side of the piston steel pipe 1 is fixedly connected with a hydraulic oil pump 13, the output end of the hydraulic oil pump 13 is fixedly connected with a connecting pipe 14, and the end away from the hydraulic oil pump 13 of the connecting pipe 14 extends to the inside of the piston steel pipe 1.

[0041] When the shock absorber needs to adjust the damping quickly during the driving process of the car, the hydraulic oil pump 13 is started, and in order to keep the car body stable when the car is high-speed turning, the damping of the shock absorber needs to be increased, at this time, the hydraulic oil pump 13 injects additional hydraulic oil into the piston steel pipe 1 through the connecting pipe 14, changes the hydraulic pressure difference on both sides of the piston main body 3, thereby increasing the damping force of the shock absorber, and effectively inhibiting the roll of the car body.

[0042] In a preferred embodiment, the outer surface of the piston steel pipe 1 is provided with a surface treatment layer 7 formed by a chemical nickel-phosphorus alloy plating process.

[0043] In this embodiment, the piston steel pipe 1 is exposed to the external environment and is easily eroded by rainwater, dust and various corrosive substances, and the surface treatment layer 7 is formed by a chemical nickel-phosphorus alloy plating process and has good corrosion resistance and wear resistance.

[0044] Working principle: when the shock absorber is impacted by the outside in use, the piston rod main body 4 drives the piston main body 3 to move up and down in the piston steel pipe 1, the sealing ring 5 is in close contact with the finish rolling wear-resistant layer 6 to ensure the sealing, and the hydraulic oil pump 13 injects hydraulic oil into the piston steel pipe 1 through the connecting pipe 14 to form damping;

[0045] The compression spring 12 provides elastic buffering under the adjustment of the adjusting nut 11, and the sealing oil seal 10 prevents hydraulic oil leakage;

[0046] The piston steel pipe 1 is made of alloy structural steel by finish rolling process, the finish rolling wear-resistant layer 6 on the inner wall forms a high-hardness surface through electroplating process, and the chemical nickel-phosphorus alloy treatment layer on the outer surface enhances corrosion resistance, so that the piston rod can maintain high precision and wear resistance in long-term reciprocating motion;

[0047] The connecting head 9 and the fixed plate 8 realize connection with external mechanisms, and the whole device realizes high-efficiency shock-absorbing effect through the synergistic effect of hydraulic damping and spring buffering.

[0048] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. The substitution can be the substitution of part of the structure, device, method step, or the complete technical solution. According to the technical solution and the utility model concept of the present application, equivalent substitution or change should be covered in the protection scope of the present application.

Claims

1. A precision-rolled seamless steel tube for a shock absorber piston rod, comprising a piston steel tube (1) and a top cover (2), wherein the piston steel tube (1) is made of precision-rolled alloy structural steel, characterized in that, The top cover (2) is connected to the top of the piston steel tube (1) by a plurality of screws, and further comprises: Piston body (3), the piston body (3) is set inside the piston steel tube (1) and the top is fixedly connected to the piston rod body (4), the top of the piston rod body (4) penetrates the top cover (2); Two sealing rings (5), both of which are embedded in the outer piston body (3); The wear-resistant layer (6) is provided on the inner wall of the piston steel tube (1) and is formed by electroplating of a high-hardness alloy material. The sealing ring (5) is in contact with the wear-resistant layer (6).

2. The precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, The bottom of the piston steel pipe (1) and the top of the piston rod body (4) are both fixedly connected to a fixing plate (8), and a connector (9) is fixedly connected to the side of the two fixing plates (8) that are far apart from each other.

3. The precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, The top cover (2) is inlaid with a sealing oil seal (10), and the piston rod body (4) is used in conjunction with the sealing oil seal (10).

4. The precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, An adjusting nut (11) is threaded onto the outside of the piston steel tube (1), and a compression spring (12) is sleeved between the top of the adjusting nut (11) and the bottom of one of the fixing plates (8) on the outside of the piston steel tube (1).

5. A precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, A hydraulic oil pump (13) is fixedly connected to one side of the piston steel pipe (1), and a connecting pipe (14) is fixedly connected to the output end of the hydraulic oil pump (13). The end of the connecting pipe (14) away from the hydraulic oil pump (13) extends into the interior of the piston steel pipe (1).

6. A precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, The outer surface of the piston steel pipe (1) is provided with a surface treatment layer (7), which is formed by chemical nickel-phosphorus alloy plating process.

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