Novel shock absorber

Abstract

The utility model provides a novel shock absorber, and belongs to the technical field of shock absorbers. The novel shock absorber mainly comprises a base, a front fork pipe and a sleeve, the base is arranged at the bottom of the front fork pipe in a sleeved mode to seal the front fork pipe, an inner pipe is coaxially installed in the front fork pipe, a main spring is installed in the front fork pipe around the outer side of the inner pipe, and a piston rod is installed at the center of the upper end of the inner pipe in an inserted mode. A second piston ring, a valve seat, a buffer spring and a guide seat sequentially sleeve the bottom of the piston rod in the inner pipe from bottom to top; the upper end of the front fork pipe is sleeved with the sleeve, an outer barrel is integrally formed at the top, a plug is mounted at the top of the outer barrel in a matched mode, and the piston rod is arranged in the center in the sleeve and extends upwards to penetrate through the outer barrel to be fixedly connected with the plug. The shock absorber has the advantages that under the condition that the overall length of the shock absorber is fixed, the length of the main spring is longer, and the shock absorption effect is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock absorbers, and particularly relates to a novel shock absorber. Background Art

[0002] Shock absorbers are used to suppress the shock caused by the rebound of the spring after absorbing the shock and the impact from the road surface. They are widely used in vehicles to accelerate the attenuation of the vibration of the frame and body to improve the driving smoothness of the vehicle. A pair of shock absorbers are usually installed between the frame and the wheel frame of a motorcycle.

[0003] The motorcycle shock absorber under the prior art, for example, the motorcycle front shock absorber disclosed in the patent with application number CN201110233955.8, mainly includes a sleeve, a handle tube, a damping tube, a plug, a block, a hollow piston rod, a piston, a hollow screw, a valve plate, an elastic plate, a valve needle, a valve needle spring, a push rod, an adjusting screw, a blind head, a large compression spring, an adjusting nut and a rotating handle. The large compression spring is mostly arranged at one end of the sleeve and on the rear side of the small compression spring. When the overall length of the shock absorber is constant, the length and compression stroke of the large compression spring in this structure are relatively short. Therefore, in actual applications, the frequency of spring vibration is relatively high and the shock absorption effect is relatively poor. Utility Model Content

[0004] The utility model aims to solve the above problems existing in the prior art and provides a novel shock absorber with a longer main spring and better shock absorption effect under the condition that the overall length of the shock absorber is constant.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A novel shock absorber mainly includes a base, a front fork tube and a sleeve;

[0006] The base is sleeved on the bottom of the front fork tube to seal it; the front fork tube is installed with a positioning seat at the bottom of the tube, and an inner tube coaxial with the front fork tube is sleeved on the upper end of the positioning seat, and a main spring is installed in the front fork tube around the outer side of the inner tube, and a spring compression sleeve is arranged on the top of the main spring; a piston rod is installed in the center of the upper end of the inner tube, and the part of the bottom of the piston rod inside the inner tube is sleeved with a second piston ring, a valve seat, a buffer spring and a guide seat in sequence from bottom to top;

[0007] The sleeve is sleeved on the outer side of the upper end of the front fork tube, and an outer cylinder is formed integrally on the top, and a plug is installed on the top of the outer cylinder. The piston rod is arranged at the inner center of the sleeve, and extends upward through the outer cylinder and is fixedly connected with the plug. An annular storage space is formed between the bottom of the sleeve and the outer side wall of the front fork tube, and an annular oil seal is sleeved and installed inside. A spring pressure tube coaxial with the sleeve is sleeved and installed at the upper end of the spring pressure sleeve inside the sleeve, a spring seat is installed between the top of the spring pressure tube and the top of the inner cavity of the sleeve, and a buffer rubber pad is installed on the top of the spring seat.

[0008] In the above-mentioned new shock absorber, a gas cylinder is formed on the base, and the end cover of the gas cylinder is detachably sealed and fixed at the port of the gas cylinder by means of an hexagon socket screw, and the hexagon socket screw passes through the center of the gas cylinder and is connected to the base; a fender bracket is installed on the base above the gas cylinder by means of screws.

[0009] In the above-mentioned new shock absorber, a first piston ring is installed on the top of the positioning seat through a fixing screw, and a saddle-type spring washer is installed between the first piston ring and the head of the fixing screw; a first O-ring is arranged between the outer wall of the bottom of the positioning seat and the inner wall of the front fork tube.

[0010] In the above-mentioned novel shock absorber, a nylon self-locking nut is sleeved on the bottom tail end of the piston rod, a valve plate is installed between the second piston ring and the valve seat, and a second O-ring is arranged between the guide seat and the side wall of the piston rod.

[0011] In the above-mentioned novel shock absorber, a travel indicator ring is sleeved on the outer side wall of the front fork tube between the base and the sleeve.

[0012] In the above-mentioned novel shock absorber, the piston rod and the plug, as well as the plug and the outer tube are fixedly connected by threaded connection, and a third O-ring is arranged above the thread between the plug and the inner wall of the outer tube.

[0013] In the above-mentioned new shock absorber, an oil seal retaining ring and an oil seal clamping ring are respectively installed at the upper and lower ends of the annular oil seal, a dust seal is installed below the oil seal clamping ring between the bottom tail end of the sleeve and the outer wall of the front fork tube, and a positive-rolled composite sleeve is arranged above the oil seal retaining ring between the inner wall of the sleeve and the outer wall of the front fork tube.

[0014] Compared with the prior art, the novel shock absorber provided by the utility model sets the main spring in the front fork tube, so that the main spring length and compression stroke are longer when the overall length of the shock absorber is constant, thereby reducing the spring vibration frequency and effectively enhancing the shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the novel shock absorber;

[0016] Figure 2 It is a structural sectional view of the novel shock absorber.

[0017] In the above figure, 100, base; 110, gas cylinder; 111, hexagon socket screw; 120, fender bracket; 200, front fork tube; 210, positioning seat; 211, fixing screw; 212, first piston ring; 213, saddle spring washer; 214, first O-ring; 220, inner tube; 221, nylon self-locking nut; 222, second piston ring; 223, valve plate; 224, valve seat; 225, buffer spring; 226, guide seat; 227, second O-ring; 230, main spring; 231, spring compression sleeve; 240, piston rod; 250, stroke indicator ring;

[0018] 300, sleeve; 310, outer tube; 311, plug; 312, third O-ring; 320, spring pressure tube; 321, spring seat; 322, buffer rubber pad; 330, dust seal; 340, annular oil seal; 341, oil seal clamp ring; 342, oil seal retaining ring; 350, positive roll composite sleeve. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1 to Figure 2 As shown, the novel shock absorber mainly includes a base 100, a front fork tube 200 and a sleeve 300. The base 100 is sleeved on the bottom of the front fork tube 200 to seal it, and the sleeve 300 is sleeved on the outer side of the upper end of the front fork tube 200 from top to bottom, and the sleeve 300 can move up and down along the front fork tube 200.

[0021] like Figure 2 As shown, a cylindrical mounting groove is formed on the top of the base 100, and the front fork tube 200 is inserted into the mounting groove from top to bottom to seal the port. The base 100 is formed with a mounting through hole at the bottom below the mounting groove, and an ear-shaped mounting structure and a gas cylinder 110 are formed on both sides, respectively, and a mounting hole is opened on the ear-shaped mounting structure. The gas cylinder 110 is tilted upward and has a hollow structure inside. The end cover of the gas cylinder 110 is detachably sealed and fixed at the port of the gas cylinder 110 by a hexagon socket screw 111, and the hexagon socket screw 111 passes through the center of the gas cylinder 110 and is connected to the base 100. Nitrogen is stored inside the gas cylinder 110, which mainly alleviates the volume change of the hydraulic chamber and the anti-air travel effect generated when the sleeve 300 moves, and plays a role in auxiliary shock absorption. A fender bracket 120 is installed on the base 100 above the gas cylinder 110 by screw connection, and the fender bracket 120 is used to install and connect the fender.

[0022] A positioning seat 210 is installed at the bottom of the front fork tube 200 extending into the installation groove of the base 100, and an inner tube 220 coaxial with the front fork tube 200 is sleeved and installed on the upper end of the positioning seat 210. The lower surface of the positioning seat 210 is in contact with the bottom of the installation groove, and a first O-ring 214 is arranged between the outer wall of the bottom and the inner wall of the front fork tube 200. The first O-ring 214 plays a sealing role to prevent air and oil leakage. A first piston ring 212 is installed on the top of the positioning seat 210 through a fixing screw 211. The first piston ring 212 is in contact with the inner wall of the inner tube 220 to ensure the sealing of the lower end of the inner tube 220. A saddle spring washer 213 is installed between the first piston ring 212 and the head of the fixing screw 211. The saddle spring washer 213 plays a role in preventing the fixing screw 211 from loosening.

[0023] The main spring 230 is installed around the inner tube 220 itself in the front fork tube 200, and a spring compression sleeve 231 is provided on the top of the main spring 230. Since the main spring 230 is installed in the front fork tube 200, compared with the prior art in which the main spring 230 is installed in the sleeve 300, the utility model can make the main spring 230 have a longer length and compression stroke when the overall length of the shock absorber is constant, thereby reducing the spring vibration frequency and achieving a better shock absorption effect.

[0024] A piston rod 240 is installed in the center of the upper end of the inner tube 220 in an inserted manner. The piston rod 240 can move up and down in the inner tube 220. The bottom of the piston rod 240 in the inner tube 220 is sleeved with a second piston ring 222, a valve seat 224, a buffer spring 225 and a guide seat 226 in sequence from bottom to top. The piston rod 240 is sleeved with a nylon self-locking nut 221 at the bottom tail end below the second piston ring 222. The nylon self-locking nut 221 is a high vibration-resistant and anti-loosening fastening part with a self-locking function, which can prevent itself from loosening and falling off when the piston rod 240 moves, so that the piston rod 240 drives the above structures of the nut to move together.

[0025] The second piston ring 222 is also attached to the inner wall of the inner tube 220 to ensure the sealing of the upper end of the inner tube 220. At the same time, the second piston ring 222 moves up and down with the piston rod 240, which can scrape the oil from the wall of the inner tube 220 and control the oil. The valve seat 224 and the guide seat 226 are located at both ends of the buffer spring 225 to bear the elastic force of the buffer spring 225. A valve plate 223 is installed between the second piston ring 222 and the valve seat 224. The buffer spring 225 can offset the impact force and buffer the inertia of movement when the piston rod 240 moves up and down. A second O-ring 227 is arranged between the guide seat 226 and the side wall of the piston rod 240. The second O-ring 227 plays a sealing role on the one hand, and plays a role in fixing the guide seat 226 and the piston rod 240 relatively on the other hand.

[0026] To further explain, a travel indicator ring 250 is sleeved on the outer wall of the front fork tube 200 between the base 100 and the sleeve 300 , and the travel indicator ring 250 is used to indicate the relative position and travel distance of the sleeve 300 when it moves up and down along the front fork tube 200 .

[0027] The top of the sleeve 300 is integrally formed with an outer cylinder 310. Compared with the outer cylinder 310 in the prior art, which mostly adopts a split structure, the integrally formed outer cylinder 310 of the utility model has better integrity, sealing and stability. A plug 311 is installed on the top of the outer cylinder 310 through a threaded connection. A third O-ring 312 is arranged above the thread between the plug 311 and the inner wall of the outer cylinder 310. The third O-ring 312 serves to strengthen the sealing and connection stability between the plug 311 and the outer cylinder 310. The piston rod 240 is arranged at the center of the sleeve. It extends upward through the outer cylinder 310 and is fixedly connected with the plug 311 through a threaded connection, so that the piston rod 240 and the sleeve 300 are relatively fixed. When the piston rod 240 moves up and down in the inner tube 220, it drives the sleeve 300 to move up and down along the front fork tube 200 at the same time.

[0028] The interior of the sleeve 300 is an inner cavity opening downward. When the sleeve 300 is sleeved on the front fork tube 200 from top to bottom, a spring compression tube 320 coaxial with the sleeve 300 is sleeved and installed on the upper end of the spring compression sleeve 231 inside the sleeve 300. A spring seat 321 is installed between the top of the spring compression tube 320 and the top of the inner cavity of the sleeve 300. A buffer rubber pad 322 is installed on the top of the spring seat 321, and the buffer rubber pad 322 plays a buffering role.

[0029] An annular storage space is formed between the bottom of the sleeve 300 and the outer wall of the front fork tube 200. An annular oil seal 340 is installed on the outer wall of the front fork tube 200 in the storage space. The upper and lower ends of the annular oil seal 340 are respectively installed with an oil seal retaining ring 342 and an oil seal clamping ring 341. The three together play the role of isolating oil and preventing hydraulic oil leakage. Below the oil seal clamping ring 341, a dust seal 330 is installed between the bottom tail end of the sleeve 300 and the outer wall of the front fork tube 200. The dust seal 330 seals the lower end of the storage space to prevent mud, dust, water vapor, etc. from invading the storage space. Above the oil seal retaining ring 342, a positively wound composite sleeve 350 is arranged between the inner wall of the sleeve 300 and the outer wall of the front fork tube 200. The positively wound composite sleeve 350 is a thin-walled structure with good wear resistance and running-in performance. It plays a role in protecting the grinding shaft when moving, without the shaft biting phenomenon and low noise.

[0030] The working principle of the utility model is as follows: when the motorcycle is on a bumpy road section and drives from a low point to a high point, the shock absorber sleeve 300 and the piston rod 240 move downward together. At this time, the sleeve 300 applies downward pressure to the spring seat 321, which is transmitted to the main spring 230 through the spring pressure tube 320 and the spring pressure sleeve 231 to compress it, so that the main spring 230 absorbs part of the impact force to play a shock absorbing role, and the piston rod 240 and its bottom structure move downward in the inner tube 220, compressing the hydraulic oil to produce a damping effect to assist shock absorption; when the motorcycle drives from a high point to a low point, the main spring 230 recovers upward under the action of its own elastic force, and pushes the spring pressure sleeve 231, the spring pressure tube 320 and the spring seat 321 in turn, driving the sleeve 300 and the piston rod 240 to move upward together to restore the original state.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0032] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel shock absorber, mainly comprising a base (100), a front fork tube (200) and a sleeve (300); characterized in that: The base (100) is sleeved on the bottom of the front fork tube (200) to seal it; a positioning seat (210) is installed at the bottom of the front fork tube (200); an inner tube (220) coaxial with the front fork tube (200) is sleeved on the upper end of the positioning seat (210); a main spring (230) is installed around the outer side of the inner tube (220) in the front fork tube (200); a spring compression sleeve (231) is arranged on the top of the main spring (230); a piston rod (240) is installed in the center of the upper end of the inner tube (220) in an insert-type manner; the bottom of the piston rod (240) in the inner tube (220) is sleeved with a second piston ring (222), a valve seat (224), a buffer spring (225) and a guide seat (226) in sequence from bottom to top; The sleeve (300) is sleeved on the outer side of the upper end of the front fork tube (200), and an outer tube (310) is integrally formed at the top, and a plug (311) is installed on the top of the outer tube (310). The piston rod (240) is arranged at the center of the sleeve, and extends upward through the outer tube (310) to be fixedly connected with the plug (311). An annular storage space is formed between the bottom of the sleeve (300) and the outer wall of the front fork tube (200), and an annular oil seal (340) is sleeved inside. A spring pressure tube (320) coaxial with the sleeve (300) is sleeved on the upper end of the spring pressure sleeve (231) inside the sleeve (300), a spring seat (321) is installed between the top of the spring pressure tube (320) and the top of the inner cavity of the sleeve (300), and a buffer rubber pad (322) is installed on the top of the spring seat (321).

2. A novel shock absorber according to claim 1, characterized in that: A gas cylinder (110) is formed on the base (100); an end cover of the gas cylinder (110) is detachably sealed and fixed at the port of the gas cylinder (110) by means of a hexagon socket screw (111); the hexagon socket screw (111) passes through the center of the gas cylinder (110) and is connected to the base (100); a fender bracket (120) is installed on the base (100) above the gas cylinder (110) by means of screw connection.

3. A novel shock absorber according to claim 1, characterized in that: A first piston ring (212) is installed on the top of the positioning seat (210) via a fixing screw (211), and a saddle-shaped spring washer (213) is installed between the first piston ring (212) and the head of the fixing screw (211); a first O-ring (214) is arranged between the outer side wall of the bottom of the positioning seat (210) and the inner wall of the front fork tube (200).

4. A novel shock absorber according to claim 1, characterized in that: A nylon self-locking nut (221) is sleeved on the bottom tail end of the piston rod (240), a valve plate (223) is installed between the second piston ring (222) and the valve seat (224), and a second O-ring (227) is arranged between the guide seat (226) and the side wall of the piston rod (240).

5. A novel shock absorber according to claim 1, characterized in that: A travel indicating ring (250) is sleeved on the outer side wall of the front fork tube (200) between the base (100) and the sleeve (300).

6. A novel shock absorber according to claim 1, characterized in that: The piston rod (240) and the plug (311), as well as the plug (311) and the outer tube (310) are fixedly connected via threaded connection, and a third O-ring (312) is provided above the thread between the plug (311) and the inner wall of the outer tube (310).

7. A novel shock absorber according to claim 1, characterized in that: The annular oil seal (340) is respectively provided with an oil seal retaining ring (342) and an oil seal clamping ring (341) at the upper and lower ends thereof; a dust seal (330) is provided below the oil seal clamping ring (341) between the bottom tail end of the sleeve (300) and the outer wall of the front fork tube (200); and a positively rolled composite sleeve (350) is provided above the oil seal retaining ring (342) between the inner wall of the sleeve (300) and the outer wall of the front fork tube (200).

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