Lockable oil pressure rod for bicycle

Abstract

The lockable oil pressure bar for the bicycle comprises an oil cylinder and a piston rod, a piston is arranged in the oil cylinder, a valve element is arranged on the inner side of the piston, and a circulation hole is formed in the side face of the piston. An end hole is formed in the end, facing the tail end of the oil cylinder, of the valve element. The valve element is sleeved with a reset spring. The valve element is used for blocking or opening a channel between the circulation hole and the end hole. The piston rod is inserted into the oil cylinder from the front end of the oil cylinder, and the end, inserted into the oil cylinder, of the piston rod is inserted into the piston and connected with the piston. A valve rod is arranged on the inner side of the piston rod and can move back and forth in the piston rod, the end, facing the valve element, of the valve rod abuts against the valve element, an adjusting screw is arranged at the end, facing the outside, of the piston rod, and the adjusting screw abuts against the valve rod. A reset spring is arranged on the valve element, so that the valve element can automatically reset when the valve rod does not abut against the valve element; the damping oil on the two sides of the piston can be guaranteed to flow smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic rods, in particular to a lockable hydraulic rod for a bicycle. Background Art

[0002] The front fork of a mountain bike is generally equipped with a shock-absorbing structure, and the front fork shock-absorbing structure is mostly a hydraulic rod. With the development of technology, the hydraulic rod used for the shock-absorbing of the front fork of a bicycle is now developed into two types: a lockable hydraulic rod and a non-lockable hydraulic rod.

[0003] The Chinese patent with the patent number CN201920435212.0 discloses a hydraulic rod for shock-absorbing front forks, including a hydraulic rod body, a locking piece is installed at one end of the hydraulic rod body, a European ring is installed at the lower end of the locking piece, a retaining ring is installed in the European ring, a guide rod is installed at the lower end of the retaining ring, a push rod is installed in the guide rod, one end of the push rod is pressed against the top of the guide rod, and the other end is pressed against the inside of the positioning rubber ring, the other end of the positioning rubber ring is fixed to the inner end of the guide rod, the guide rod is clamped in the oil stopper, and the oil stopper is installed at the other end of the hydraulic rod body. This hydraulic rod can avoid the piston head from locking by adopting the matching structure of the push rod and the positioning rubber ring, and adopts the European ring, which has better sealing and silencing effects.

[0004] The wire-controlled hydraulic rod provided by the above patent is locked or unlocked by wire pulling. In practice, bicycles that use wire pulling to lock the shock absorber hydraulic rod of mountain bikes are generally expensive and have a small audience. In the market, mountain bikes with a high audience and a general price all use hydraulic rods that cannot be locked or hydraulic rods that are manually twisted. The valve core of the hydraulic rod is not easy to fix tightly, which makes the valve core easy to loosen, and needs further improvement. Utility Model Content

[0005] The utility model aims to provide a lockable hydraulic rod for a bicycle, aiming to improve the problem that the valve core of the existing hydraulic rod is not easy to be fixed tightly, resulting in the valve core being easy to loosen.

[0006] The utility model is achieved in this way:

[0007] A lockable hydraulic rod for a bicycle comprises an oil cylinder and a piston rod, wherein a piston is arranged inside the oil cylinder, a valve core is arranged inside the piston, and a circulation hole is arranged on the side of the piston; an end of the valve core facing the rear end of the oil cylinder is provided with an end hole; a return spring is sleeved on the valve core; the valve core is used to block or open the passage between the circulation hole and the end hole; the piston rod is inserted into the oil cylinder from the front end of the oil cylinder, and the end of the piston rod inserted into the oil cylinder is inserted into the piston and connected with the piston; a valve stem is arranged inside the piston rod, and the valve stem can move back and forth inside the piston rod, and the end of the valve stem facing the valve core is against the valve core, and the end of the piston rod facing the outside is provided with an adjusting screw, and the adjusting screw is against the valve stem.

[0008] Preferably, ports are provided at both ends of the oil cylinder, a tail plug is installed inside the port at the rear end of the oil cylinder, and a first O-ring is provided between the tail plug and the inner wall of the oil cylinder.

[0009] Preferably, a guide washer is provided at the port on the inner side of the oil cylinder that is close to the front end, an oil seal is provided at the tail end of the guide washer, a second O-ring is provided between the oil seal and the oil cylinder, and a limit pad is provided at the tail end of the oil seal.

[0010] Preferably, a mounting opening is provided at one end of the piston facing the piston rod, a limiting ring is provided on the inner side of the mounting opening, a mounting groove is provided on the outer side of the rear end of the piston, and a third O-ring is provided on the inner side of the mounting groove.

[0011] Preferably, two sealing rings are provided at one end of the valve core close to the piston rod, and a fourth O-ring is provided between the two sealing rings.

[0012] Preferably, a fifth O-ring is provided on the outer side surface of one end of the piston rod inserted into the piston, and the fifth O-ring is used to seal between the piston rod and the piston; a limiting groove is provided on the side of the piston rod, and the limiting ring is snapped into the limiting groove; an adjusting groove is provided on the end of the piston rod facing outward, and the adjusting screw is installed inside the adjusting groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The valve core of the utility model is provided with a reset spring. Such a structure can automatically reset the valve core when the valve stem does not press against the valve core, which can ensure that the damping oil on both sides of the piston can flow smoothly, thereby achieving the purpose of damping and shock reduction. Locking the valve core by adjusting the bolt can ensure that the valve core is locked stably and avoid the problem of incomplete locking.

[0015] 2. The utility model adopts an oil seal between the oil cylinder and the piston rod to seal the piston rod and the oil cylinder, so that the piston rod can be stably extended and used to avoid oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the utility model as a whole;

[0017] Figure 2 It is a cross-sectional view of the oil cylinder of the utility model;

[0018] Figure 3 It is a cross-sectional view of the piston of the utility model;

[0019] Figure 4 It is a cross-sectional view of the piston rod of the utility model.

[0020] In the figure: 1. Cylinder; 11. Port; 12. Tail plug; 13. First O-ring; 14. Guide gasket; 15. Oil seal; 16. Second O-ring; 17. Limiting pad; 2. Piston; 20. End hole; 21. Mounting groove; 22. Third O-ring; 23. Flow hole; 24. Valve core; 25. Return spring; 26. Mounting opening; 27. Limiting ring; 28. Sealing ring; 29. ​​Fourth O-ring; 3. Piston rod; 31. Fifth O-ring; 32. Limiting groove; 33. Valve stem; 34. Adjusting groove; 35. Adjusting screw. DETAILED DESCRIPTION

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0023] Example 1

[0024] like Figure 1 , Figure 3 and Figure 4As shown, a lockable hydraulic rod for bicycles includes an oil cylinder 1 and a piston rod 3. A piston 2 is provided inside the oil cylinder 1. The piston 2 is used to generate interaction force with the hydraulic oil when moving, so that the hydraulic rod can achieve the purpose of shock absorption and buffering. A valve core 24 is provided inside the piston 2, and a flow hole 23 is provided on the side of the piston 2; the end of the valve core 24 facing the tail end of the oil cylinder 1 is provided with an end hole 20; a return spring 25 is sleeved on the valve core 24; the valve core 24 is used to block or open the passage between the flow hole 23 and the end hole 20; this structure can realize the unlocking and locking of the hydraulic rod by moving the valve core 24 forward and backward. After the valve stem 33 is relaxed, the return spring 25 drives the piston 2 to continue to press against the valve stem 33, so that the passage between the flow hole 23 and the end hole 20 can be opened. The piston rod 3 is inserted into the oil cylinder 1 from the front end of the oil cylinder 1, and the end of the piston rod 3 inserted into the oil cylinder 1 is inserted into the piston 2 and connected with the piston 2; this structure facilitates the piston rod 3 to drive the piston 2 to move. A valve stem 33 is provided on the inner side of the piston rod 3, and the valve stem 33 can move back and forth inside the piston rod 3. The end of the valve stem 33 facing the valve core 24 is against the valve core 24, and an adjusting screw 35 is provided on the end of the piston rod 3 facing the outside, and the adjusting screw 35 is against the valve stem 33; this structure makes it easy to drive the valve stem 33 to press against the valve core 24 by turning the adjusting bolt, so that the valve core 24 blocks the end hole 20, and also makes it possible to open the passage between the flow hole 23 and the end hole 20 under the action of the reset spring 25 after the valve core 24 and the valve stem 33 are unlocked.

[0025] Working principle: The lockable hydraulic rod piston rod 3 is installed upward on one side of the bicycle front fork, and a mechanical spring or gas spring is usually installed on the other side. Damping oil is added to the hydraulic rod cylinder. When the adjusting screw 35 is loosened, the valve core 24 opens, the two sides of the piston 2 are unobstructed, the piston rod 3 can be extended and retracted freely, and the front fork has a shock-absorbing function; when the adjusting screw 35 is tightened, the valve core 24 is closed, and when the piston rod 3 is pressed down, the third O-ring 22 on the piston 2 leans toward the side without a gap, the two sides of the piston 2 are closed, the piston rod 3 is locked, and the front fork does not have a shock-absorbing function, just like a hard fork. Compared with the prior art, the valve core 24 of the present application is provided with a reset spring 25. Such a structure can automatically reset the valve core 24 when the valve stem 33 does not resist the valve core 24; this can ensure that the damping oil on both sides of the piston 2 can flow smoothly, thereby achieving the purpose of damping and shock reduction; and locking the valve core 24 by adjusting the bolt can ensure that the valve core 24 is locked stably, avoiding the problem of incomplete locking.

[0026] Example 2

[0027] like Figure 1 , Figure 3 and Figure 4As shown, a lockable hydraulic rod for bicycles includes an oil cylinder 1 and a piston rod 3. A piston 2 is provided inside the oil cylinder 1. The piston 2 is used to generate interaction force with the hydraulic oil when moving, so that the hydraulic rod can achieve the purpose of shock absorption and buffering. A valve core 24 is provided inside the piston 2, and a flow hole 23 is provided on the side of the piston 2; the end of the valve core 24 facing the tail end of the oil cylinder 1 is provided with an end hole 20; a return spring 25 is sleeved on the valve core 24; the valve core 24 is used to block or open the passage between the flow hole 23 and the end hole 20; this structure can realize the unlocking and locking of the hydraulic rod by moving the valve core 24 forward and backward. After the valve stem 33 is relaxed, the return spring 25 drives the piston 2 to continue to press against the valve stem 33, so that the passage between the flow hole 23 and the end hole 20 can be opened. The piston rod 3 is inserted into the oil cylinder 1 from the front end of the oil cylinder 1, and the end of the piston rod 3 inserted into the oil cylinder 1 is inserted into the piston 2 and connected with the piston 2; this structure facilitates the piston rod 3 to drive the piston 2 to move. A valve stem 33 is provided on the inner side of the piston rod 3, and the valve stem 33 can move back and forth inside the piston rod 3. The end of the valve stem 33 facing the valve core 24 is against the valve core 24, and an adjusting screw 35 is provided on the end of the piston rod 3 facing the outside, and the adjusting screw 35 is against the valve stem 33; this structure makes it easy to drive the valve stem 33 to press against the valve core 24 by turning the adjusting bolt, so that the valve core 24 blocks the end hole 20, and also makes it possible to open the passage between the flow hole 23 and the end hole 20 under the action of the reset spring 25 after the valve core 24 and the valve stem 33 are unlocked.

[0028] like Figure 2 As shown, ports 11 are provided at both ends of the oil cylinder 1, and ports 11 are convenient for installing various components. A tail plug 12 is installed inside the port 11 at the tail end of the oil cylinder 1, and a first O-ring 13 is provided between the tail plug 12 and the inner wall of the oil cylinder 1; the tail plug 12 cooperates with the first O-ring 13 to facilitate the sealing of the rear end of the oil cylinder 1. A guide washer 14 is provided at the port 11 on the inner side of the oil cylinder 1 that fits the front end, and an oil seal 15 is provided at the tail end of the guide washer 14, and a second O-ring 16 is provided between the oil seal 15 and the oil cylinder 1, and a limit washer 17 is provided at the tail end of the oil seal 15; this structure can ensure the stable extension and retraction of the piston rod 3, and also ensure the sufficient stability of the oil seal 15.

[0029] like Figure 3 As shown, the end of the piston 2 facing the piston rod 3 is provided with a mounting opening 26, and a limit ring 27 is provided inside the mounting opening 26. This structure is convenient for connecting the piston rod 3 with the piston 2. A mounting groove 21 is provided on the outer side of the rear end of the piston 2, and a third O-ring 22 is provided inside the mounting groove 21; this structure is convenient for sealing between the piston 2 and the inner wall of the cylinder 1.

[0030] like Figure 4As shown, two sealing rings 28 are provided at one end of the valve core 24 close to the piston rod 3 , and a fourth O-ring 29 is provided between the two sealing rings 28 ; this structure facilitates effective sealing between the valve core 24 and the piston 2 .

[0031] like Figure 4 As shown, a fifth O-ring 31 is provided on the outer side of the end of the piston rod 3 inserted into the piston 2, and the fifth O-ring 31 is used to seal between the piston rod 3 and the piston 2; this structure can ensure effective sealing between the piston rod 3 and the piston 2. A limiting groove 32 is provided on the side of the piston rod 3, and the limiting ring 27 is inserted into the limiting groove 32. This structure facilitates the stable connection between the piston rod 3 and the piston 2. An adjustment groove 34 is provided at the end of the piston rod 3 facing the outside, and an adjustment screw 35 is installed inside the adjustment groove 34, so that the adjustment screw 35 is placed in the adjustment groove 34 and is not easily damaged.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lockable hydraulic rod for a bicycle, comprising a cylinder (1) and a piston rod (3), characterized in that: The oil cylinder (1) is provided with a piston (2) inside, a valve core (24) is provided inside the piston (2), and a circulation hole (23) is provided on the side of the piston (2); an end hole (20) is provided at one end of the valve core (24) facing the rear end of the oil cylinder (1); a return spring (25) is sleeved on the valve core (24); the valve core (24) is used to block or open the passage between the circulation hole (23) and the end hole (20); the piston rod (3) is inserted into the oil cylinder from the front end of the oil cylinder (1) (1), and one end of the piston rod (3) inserted into the oil cylinder (1) is inserted into the piston (2) and connected to the piston (2); a valve stem (33) is provided on the inner side of the piston rod (3), and the valve stem (33) can move back and forth inside the piston rod (3), and one end of the valve stem (33) facing the valve core (24) abuts against the valve core (24); and an adjusting screw (35) is provided on the end of the piston rod (3) facing the outside, and the adjusting screw (35) abuts against the valve stem (33).

2. The lockable hydraulic rod for bicycle according to claim 1, characterized in that: Both ends of the oil cylinder (1) are provided with ports (11), a tail plug (12) is installed inside the port (11) at the tail end of the oil cylinder (1), and a first O-ring (13) is provided between the tail plug (12) and the inner wall of the oil cylinder (1).

3. The lockable hydraulic rod for bicycle according to claim 2, characterized in that: A guide washer (14) is provided at the port (11) on the inner side of the oil cylinder (1) which is in contact with the front end; an oil seal (15) is provided at the rear end of the guide washer (14); a second O-ring (16) is provided between the oil seal (15) and the oil cylinder (1); and a limit washer (17) is provided at the rear end of the oil seal (15).

4. The lockable hydraulic rod for bicycle according to claim 1, characterized in that: An installation opening (26) is provided at one end of the piston (2) facing the piston rod (3), a limiting ring (27) is provided inside the installation opening (26), an installation groove (21) is provided on the outer side surface of the rear end of the piston (2), and a third O-ring (22) is provided inside the installation groove (21).

5. The lockable hydraulic rod for bicycle according to claim 4, characterized in that: Two sealing rings (28) are provided at one end of the valve core (24) close to the piston rod (3), and a fourth O-ring (29) is provided between the two sealing rings (28).

6. The lockable hydraulic rod for bicycle according to claim 4, characterized in that: A fifth O-ring (31) is provided on the outer side surface of one end of the piston rod (3) inserted into the piston (2), and the fifth O-ring (31) is used to seal between the piston rod (3) and the piston (2); a limiting groove (32) is provided on the side surface of the piston rod (3), and the limiting ring (27) is inserted into the limiting groove (32); an adjusting groove (34) is provided on the end of the piston rod (3) facing outward, and the adjusting screw (35) is installed in the adjusting groove (34).

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