TWM621397U - Shock absorbing device for bicycle front fork - Google Patents

Abstract

The shock absorber of this creation includes an outer tube, an inner tube, a buffer component, a fluid pressure cylinder and a control component. The top end of the inner tube passes through the outer tube, the buffer component is arranged between the outer tube and the inner tube, and has a fixed plug set on the outer tube and a main spring set between the fixed plug and the inner tube. The fluid pressure cylinder It is arranged in the inner tube and has a valve stem. The valve stem protrudes from the top surface of the fixed plug. The control assembly is arranged at the top of the outer tube and has a driving part and a pushing part. The pushing part can be driven by the driving part. Drive to push or release the top of the valve stem, and then control the opening or closing of the fluid pressure cylinder. In this way, the shock absorber device of the present invention allows the rider to decide whether to open the fluid pressure cylinder according to his own needs, so as to increase the convenience of use.

Description

Suspension device for bicycle front fork

This creation is related to bicycle front forks, especially a shock absorber for bicycle front forks.

Generally, most bicycles have the design of a shock-absorbing front fork. The shock-absorbing front fork uses the inner tube and the outer tube to penetrate each other, and then through the relative displacement of the upper and lower telescopic, and then set the air or hydraulic buffer mechanism on the inner tube. The impact force transmitted by the front wheel is absorbed and buffered by the aforementioned buffer mechanism, so as to obtain better riding comfort.

However, when the rider is riding uphill, he usually consumes a lot of strength. If the buffer mechanism is allowed to act at this time, the rider will have to step on it with more force to overcome the uphill force and buffer. The forces created by the organization. Therefore, in order to allow the rider to choose whether or not the buffer mechanism is required to provide the shock-absorbing effect in different riding environments, the shock-absorbing front fork is usually provided with a set of locking devices to control the action of the buffer mechanism, so that the rider can Adjust according to your own needs. For example, the patent case No. I326660 published by the Republic of China and the patent case No. M407876 published by the Republic of China have disclosed related technical solutions. However, the former is purely mechanical design and is prone to wear problems under long-term use. As for the latter, the It is a composite design of air chamber and oil chamber. Because of its complex structure, maintenance is not easy, and oil leakage may also occur in actual use.

The main purpose of this creation is to provide a shock absorber for a bicycle front fork, which can realize shock absorber and locking functions, and can perform any segment locking during the shock absorber process.

In order to achieve the above-mentioned main purpose, the shock absorber device of this creation includes an outer tube, an inner tube, a buffer component, a fluid pressure cylinder, and a control component. The inner tube is partially penetrated through the outer tube, the top end of the inner tube is located in the outer tube, and the bottom end of the inner tube protrudes from the bottom end of the outer tube; the buffer component is arranged on the outer tube and the inner tube There is a fixed plug and a main spring in between, the fixed plug is fixed on the top end of the outer tube, the top end of the main spring abuts against the bottom surface of the fixed plug, and the bottom end of the main spring abuts against the inner tube the top end of the fluid pressure cylinder; the fluid pressure cylinder is arranged between the outer pipe and the inner pipe and penetrates the main spring, the top end of the fluid pressure cylinder is fixed on the fixed plug, the fluid pressure cylinder has a valve stem, the The valve stem protrudes from the top surface of the fixed plug; the control assembly is arranged on the top of the outer tube and has a driving part and a pushing part, the pushing part can be driven by the driving part to push or release the The top end of the valve stem controls the opening or closing of the fluid pressure cylinder.

It can be seen from the above that the shock absorber of the present creation allows the rider to decide whether to open the fluid pressure cylinder according to his own needs. To provide a buffer effect, when the fluid pressure cylinder is closed, the fluid pressure cylinder and the buffer assembly will not provide a buffer effect. In other words, the shock absorber device of the present creation can realize shock absorber and locking functions, and can be locked at any stage during the shock absorber process. The rider can adjust freely during the ride without getting off the bike, and the operation is quite convenient.

Preferably, the driving member has a knob, a transmission rod and an adjusting nut. The knob is rotatably arranged on the top of the outer tube, the top of the transmission rod is connected to the knob, the bottom of the transmission rod is connected to the ejector, the ejector is screwed on the adjustment nut, the adjustment The nut is screwed on the top of the fluid pressure cylinder, and the bottom end of the adjusting nut abuts against the top surface of the fixed plug. Thereby, when the knob is rotating, the ejector can be driven to rotate together through the transmission rod. Since the adjustment nut remains stationary, the ejector will pass through the screwing relationship with the adjustment nut. The up and down displacement along its own axis makes the ejector push up or release the top of the valve stem, thereby achieving the effect of controlling the opening or closing of the fluid pressure cylinder.

Preferably, the end cap is screwed to the bottom end of the inner tube to increase the convenience of assembly and disassembly.

The detailed structure, characteristics, assembly or usage of the shock absorber device for bicycle front fork provided by the present creation will be described in the detailed description of the following embodiments. However, those with ordinary knowledge in the field of creation should be able to understand that these detailed descriptions and the specific embodiments listed for implementing the creation are only used to illustrate the creation, not to limit the scope of the patent application of the creation.

The applicant first explains that in the entire specification, including the embodiments described below and the claims of the scope of the patent application, the terms related to the directionality are based on the directions in the drawings. Next, in the embodiments and drawings to be introduced below, the same element numbers represent the same or similar elements or their structural features.

Please refer to FIG. 1 first. The bicycle front fork 12 shown in FIG. 1 includes two left and right opposite fork tubes 14 , and the top ends of the two fork tubes 14 are connected together through a hollow sleeve 16 . Please continue to refer to FIGS. 1 and 2 , the shock absorber 10 of the present invention includes an outer tube 20 , an inner tube 30 , a buffer assembly 40 , a fluid pressure cylinder 60 , and a control assembly 70 .

A sheath fixing seat 24 is sleeved at the bottom end of the outer tube 20 , and a sheath 22 is arranged between the sheath fixing seat 24 and the sleeve 16 .

The upper half of the inner tube 30 is penetrated through the outer tube 20, the top end of the inner tube 30 is provided with a support nut 32 in a screwing manner, the lower half of the inner tube 30 is located in the sheath 22 and the sleeve 16, the inner tube 30 The bottom end is provided with an end cap 34 in a screwing manner. In addition, a self-lubricating bushing 36 is disposed between the inner tube 30 and the outer tube 20 , and the self-lubricating bushing 36 provides the lubricating effect of the inner tube 30 and the outer tube 20 during relative movement.

The buffer assembly 40 is arranged between the outer tube 20 and the inner tube 30 . The buffer assembly 40 has a fixed plug 41 and a main spring 42, the fixed plug 41 is fixed on the top of the outer tube 20, the top of the main spring 42 is pressed against the bottom surface of the fixed plug 41, and the bottom of the main spring 42 is pressed against the support Nut 32. In addition, the buffer assembly 40 further has an upper bushing tube 43, a lower bushing tube 44, a sliding sleeve 45, a plurality of balls 46 (15 balls are used here as an example, but not limited thereto), and an upper sliding sleeve spring 47 and a sliding sleeve spring 48, wherein: the upper lining tube 43 is arranged between the outer tube 20 and the main spring 42, the top end of the upper lining tube 43 abuts on the bottom surface of the fixed plug 41; the lower lining tube 44 is arranged on the outer tube 20 Between the inner pipe 30, the top end of the lower liner pipe 44 abuts against the bottom end of the upper liner pipe 43, and the bottom end of the lower liner pipe 44 abuts against a liner gasket 49 sleeved on the inner pipe 30; the sliding sleeve 45 The balls 46 are arranged between the inner tube 30 and the lower lining tube 44 in a way that can slide up and down; the balls 46 are arranged in a group of three on the sliding sleeve 45 and abut against the outer peripheral surface of the inner tube 30 and the lower lining The inner peripheral surface of the tube 44; the upper sliding sleeve spring 47 is arranged between the upper lining tube 43 and the main spring 42, the top end of the upper sliding sleeve spring 47 is in contact with the bottom surface of the fixed plug 41, and the bottom end of the upper sliding sleeve spring 47 is in contact with the bottom surface of the fixed plug 41. Connected to the top of the sliding sleeve 45; the sliding sleeve spring 48 is sleeved on the inner tube 30, the top end of the sliding sleeve spring 48 is in contact with the bottom end of the sliding sleeve 45, and the bottom end of the sliding sleeve spring 48 is abutted on a sleeve set in the inner Tube gasket 50 inside tube 30 . Since the detailed operation of the buffer assembly 40 is known in the art, it will not be repeated here.

The fluid pressure cylinder 60 (which can be a pneumatic cylinder or an oil pressure cylinder, which is not limited here) is arranged between the outer tube 20 and the inner tube 30 and passes through the support nut 32 and the main spring 42 , and is connected with the support nut 32 . A rebound spring 52 is arranged therebetween. The bottom end of the fluid pressure cylinder 60 is in contact with the end cover 34 , the top end of the fluid pressure cylinder 60 has a threaded portion 62 , and the fluid pressure cylinder 60 is assembled on the fixed plug 41 with the threaded portion 62 . In addition, the fluid pressure cylinder 60 has a valve stem 64, the valve stem 64 protrudes from the top surface of the fixed plug 41, when the valve stem 64 is pressed by an external force, as shown in FIG. 4, the fluid pressure cylinder 60 can be cut off. When the external force on the valve rod 64 is released, as shown in FIG. 3 , the flow path of the fluid pressure cylinder 60 can be opened. Since the fluid pressure cylinder 60 is a conventional technology, its detailed structure and operation principle will not be described here.

The control assembly 70 has a driving member 71, and the driving member 71 has a knob 72, an adjusting nut 75 and a transmission rod 76 in this embodiment, wherein: the knob 72 has an upper cover 73 and a set under the upper cover 73 The cover 74 and the lower cover 74 are assembled on the top of the outer tube 20 by screwing; the adjusting nut 75 is assembled on the threaded portion 62 of the fluid pressure cylinder 60 by screwing, and the bottom end of the adjusting nut 75 abuts against the The top surface of the fixed plug 41; the transmission rod 76 has a hexagonal cross-section. In addition, the control assembly 70 further has an ejector 77, which is a headless socket head cap screw in this embodiment. The ejector 77 is connected to the bottom end of the transmission rod 76 and is screwed to the adjustment nut 75. When the ejector 77 is driven by the transmission rod 76, the adjustment nut 75 remains stationary, so that the ejector 77 will pass through and The screwing relationship between the adjusting nuts 75 is displaced up and down along the axial direction of the transmission rod 76 .

It can be seen from the above that when the rider rides the bicycle of the present invention on a general flat road section, by rotating the knob 72, the knob 72 drives the ejector 77 through the transmission rod 76 to release the downward force applied to the valve stem 64, To open the fluid pressure cylinder 60 (as shown in FIG. 3 ), when the front wheel is impacted, the double action of the fluid pressure cylinder 60 and the buffer assembly 40 can provide a buffer effect. When the rider rides on the uphill section, by reversing the knob 72, the knob 72 drives the ejector 77 through the transmission rod 76 to push the valve stem 64 down to close the fluid pressure cylinder 60 (as shown in FIG. 4 ). At this time, the fluid pressure cylinder 60 and the buffer assembly 40 will not provide a buffering effect, and the rider does not need to expend great effort to pedal.

In addition, it should be added that the aforementioned control assembly 70 controls the opening or closing of the fluid pressure cylinder 60 by means of a knob and a screw drive. However, in fact, the aforementioned control assembly 70 can also use a pull wire and a connecting rod to control the fluid pressure. Cylinder 60 is turned on or off.

To sum up, the shock absorber device 10 of the present creation allows the rider to decide whether to open the fluid pressure cylinder 60 according to his own needs, so as to realize the shock absorber and locking functions, and can be locked at any stage during the shock absorber process. The occupant can adjust at will during the riding process, and does not need to get off the car, and the operation is quite convenient.

10: Shock Absorber 12: Bicycle front fork 14: Fork Tube 16: Casing 20: Outer tube 22: Sheath 24: Sheath holder 30: Inner tube 32: Support nut 34: End cap 36: Self-lubricating bushing 40: Buffer components 41: Fixed plug 42: Main Spring 43: Upper liner 44: Lower liner 45: Sliding sleeve 46: Ball 47: Upper sliding sleeve spring 48: sliding sleeve spring 49: Liner Gasket 50: Inner tube gasket 52: Rebound spring 60: Fluid pressure cylinder 62: Threaded part 64: Stem 70: Control Components 71: Drivers 72: Knob 73: upper cover 74: Lower cover 75: Adjustment nut 76: Transmission rod 77: Ejector

FIG. 1 is a perspective view of the shock absorber of the invention applied to a front fork. FIG. 2 is an exploded perspective view of the shock absorber of the present invention. FIG. 3 is a cross-sectional view of the shock absorber of the creation, mainly showing the state after the fluid pressure cylinder is opened. Fig. 4 is similar to Fig. 3 and mainly shows the state after the fluid pressure cylinder is locked.

16: Casing

20: Outer tube

22: Sheath

24: Sheath holder

30: Inner tube

32: Support nut

34: End cap

36: Self-lubricating bushing

41: Fixed plug

42: Main Spring

43: Upper liner

44: Lower liner

45: Sliding sleeve

46: Ball

47: Upper sliding sleeve spring

48: sliding sleeve spring

49: Liner Gasket

50: Inner tube gasket

52: Rebound spring

60: Fluid pressure cylinder

62: Threaded part

64: Stem

70: Control Components

71: Drivers

72: Knob

73: upper cover

74: Lower cover

75: Adjustment nut

76: Transmission rod

77: Ejector

Claims (4)

A shock absorber for bicycle front fork, comprising: an outer tube; an inner tube partially penetrated through the outer tube, the top end of the inner tube is located in the outer tube, and the bottom end of the inner tube protrudes from the bottom end of the outer tube; A buffer component is arranged between the outer tube and the inner tube, the buffer component has a fixed plug and a main spring, the fixed plug is fixed on the outer tube, and the top of the main spring abuts against the fixed plug Bottom surface, the bottom end of the main spring abuts against the top end of the inner tube; A fluid pressure cylinder is arranged between the outer tube and the inner tube and penetrates through the main spring. The top end of the fluid pressure cylinder is fixed on the fixing plug. The fluid pressure cylinder has a valve stem, and the valve stem protrudes from the top surface of the retaining plug; and A control assembly is arranged at the top end of the outer tube, the control assembly has a driving part and an ejecting part, the ejecting part can be driven by the driving part to eject or release the top of the valve rod, and then control the Fluid pressure cylinder on or off. The shock absorber for a bicycle front fork according to claim 1, wherein the driving member has a knob, a transmission rod and an adjusting nut, and the knob is rotatably arranged on the top end of the outer tube, The top end of the transmission rod is connected to the knob, the bottom end of the transmission rod is connected to the ejector, the ejector is screwed to the adjustment nut, the adjustment nut is screwed to the top of the fluid pressure cylinder, and the adjustment The bottom end of the nut abuts against the top surface of the fixed plug. When the knob is rotating, the knob drives the ejector to move up and down along its axial direction through the transmission rod, so that the ejector pushes or releases the ejector. the top of the valve stem. The shock absorber for a bicycle front fork as claimed in claim 1 or 2, further comprising an end cap, the end cap is detachably arranged on the bottom end of the inner tube and abuts against the bottom end of the fluid pressure cylinder . The shock absorber for a bicycle front fork as claimed in claim 3, wherein the end cap is provided on the bottom end of the inner tube in a screwing manner.

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