Mute front fork oil pressure rod capable of being quickly locked

Abstract

The utility model discloses a front fork oil pressure bar capable of being quickly locked and muted, which relates to the field of shock absorber design and comprises an oil cylinder, a first piston, a separator and a second piston are movably mounted in the oil cylinder in a matched manner, a left end cover and a right end cover are fixedly mounted at two ends of the oil cylinder respectively, and a connecting rod is fixedly mounted between the left end cover and the first piston. A piston rod is fixedly installed at the outer end of the second piston, a piston hole is formed in the right end cover, the outer end of the piston rod is movably installed in the piston hole in a matched mode, and the separator is arranged between the first piston and the second piston in a separated mode. First damping oil is filled between a first piston of the oil cylinder and the separator, second damping oil is filled between a second piston of the oil cylinder and the right end cover, and oil passing holes are formed in the first piston and the second piston; compared with the prior art, the isolation piece is arranged in the oil cylinder, a locking system and a movement system which are separated from each other are formed in the oil cylinder, the rapid locking and mute effects are achieved, and the riding experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of shock absorber design, especially to a front fork oil pressure rod capable of quick locking and mute. BACKGROUND

[0002] Mountain bike front fork position generally installs the shock absorption structure, and the front fork shock absorption mostly adopts the oil pressure rod.

[0003] The prior art (publication number: CN222797823U, publication date: 2025.04.25) discloses a lockable oil pressure rod for bicycle, which is designed as a lockable oil pressure rod for bicycle, a reset elastic element is sleeved on the valve core, the valve core is locked by adjusting the bolt, the valve core is stably locked, and loosening is avoided.

[0004] In the above scheme, there is only one kind of damping oil in the oil pressure rod, and the damping oil has the characteristics that the greater the viscosity, the slower the flow rate, and vice versa. If the damping oil in the above scheme has high viscosity and slow flow rate, the bubbles generated after the piston moves quickly cannot be quickly gathered above the piston, and a large number of bubbles exist in the damping oil. Due to the compressibility of air, the piston can still be pressed for a distance after being locked, so the oil pressure rod will lose the locking function in a short time, and the bubbles can be gathered above the piston only after a long period of rest, at which time the locking function can be realized. If the damping oil has low viscosity and fast flow rate, the collision between gas and liquid during the rapid movement of the piston will produce a lot of noise, which seriously affects the riding experience of the rider.

[0005] Therefore, it is necessary to design a front fork oil pressure rod that has a quick locking function while reducing noise to optimize the driving experience of the rider. INVENTION CONTENTS

[0006] The utility model provides a technical scheme capable of solving the above problems to overcome the above-mentioned deficiencies.

[0007] A front fork oil pressure rod capable of quick locking and mute, comprising an oil cylinder;

[0008] A first piston, a spacer and a second piston are movably fitted and installed in the oil cylinder, left and right end covers are fixedly installed at both ends of the oil cylinder, a connecting rod is fixedly installed between the left end cover and the first piston, a piston rod is fixedly installed at the outer end of the second piston, a piston hole is formed in the right end cover, the outer end of the piston rod is movably fitted and installed in the piston hole, and the spacer is arranged between the first piston and the second piston;

[0009] The first piston and the spacer of the oil cylinder are filled with first damping oil and high-pressure air, the second piston of the oil cylinder and the right end cover are filled with second damping oil, and the first piston and the second piston are both formed with oil passing holes.

[0010] Further, the first valve core is movably arranged in the first piston, the first elastic member is abuttingly arranged between the first valve core and the first piston, the first valve core blocks the oil passing hole of the first piston, the first through hole is formed in the connecting rod and the left end cover, the first rod is movably arranged in the first through hole, and the inner end of the first rod abuts against the first valve core.

[0011] Optionally, the first elastic member is a pagoda-shaped spring.

[0012] Further, the second valve core is movably arranged in the second piston, the second elastic member is abuttingly arranged between the second valve core and the second piston, the second valve core blocks the oil passing hole of the second piston, the second through hole is formed in the piston rod, the second rod is movably arranged in the second through hole, and the inner end of the second rod abuts against the second valve core.

[0013] Optionally, the second elastic member is a pagoda-shaped spring.

[0014] Further, the second piston is integrally formed with an oil passing hole.

[0015] Further, the annular ring and the oil seal are sequentially arranged on the piston rod, the annular ring and the oil seal are movably arranged in the oil cylinder, and the second damping oil is filled between the second piston of the oil cylinder and the annular ring.

[0016] Further, the sealing ring is tightly arranged between the left end cover and the oil cylinder.

[0017] Further, the viscosity of the second damping oil is greater than that of the first damping oil.

[0018] Further, the spacer is movably arranged in the oil cylinder through the spacer ring.

[0019] Optionally, the spacer is provided with at least one.

[0020] Further, the oil cylinder is a hollow cylindrical tube.

[0021] Optionally, the left end cover and the right end cover are respectively formed with external threads on the outer sides, the oil cylinder is formed with internal threads at both ends, and the external threads are one-to-one correspondingly and screwingly arranged in the internal threads.

[0022] Optionally, the left end cover and the right end cover are fixed to the two ends of the oil cylinder by stamping.

[0023] Optionally, the left end cover and the right end cover are fixedly installed at the two ends of the oil cylinder by ultrasonic welding.

[0024] Further, the outer side of the first piston is sleeved with a sealing piston ring, the outer side of the second piston is sleeved with a moving piston ring, the first piston is movably installed in the oil cylinder through the sealing piston ring, and the second piston is movably installed in the oil cylinder through the moving piston ring.

[0025] Compared with the prior art, the utility model has the beneficial effects that:

[0026] 1. The isolating piece is arranged in the oil cylinder and is used for separating the first damping oil and the second damping oil, the isolating piece separates the locking system of the first piston and the movement system of the second piston, the first damping oil of the locking system is filled as low-viscosity and high-flow-rate damping oil, and the oil pressure rod can realize the quick locking effect;

[0027] 2. The movement system of the second piston is filled with high-viscosity and low-flow-rate second damping oil, and is used for reducing the noise generated by the movement of the second piston;

[0028] 3. The isolating piece can avoid the interference of the low-viscosity and high-flow-rate first damping oil on the movement system, and can also avoid the interference of the high-viscosity and low-flow-rate second damping oil on the locking system, so that the functions of quick locking and low noise are realized.

[0029] The utility model is used as a shock absorber, can be applied to the front fork oil pressure rod of a bicycle, can also be applied to an electric vehicle, a tricycle, a vehicle and the like, and in addition, the utility model can also be applied to various mechanical equipment requiring damping, because the locking and mute effects can be realized, the application range of the utility model is wide, and the utility model is beneficial to market promotion.

[0030] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creative labor.

[0032] Figure 1 It is the cross-sectional structure schematic view of the utility model;

[0033] Figure 2 It is the cross-sectional structure schematic view of the oil cylinder and the right end cover;

[0034] Figure 3 is the sectional structure schematic view of the first piston, left end cover and connecting rod;

[0035] Figure 4 is the sectional structure schematic view of the first piston, left end cover and connecting rod; Figure 3

[0036] Figure 5 is the sectional structure schematic view of the isolating piece;

[0037] Figure 6 is the sectional structure schematic view of the second piston, piston rod, circular ring and oil seal;

[0038] Figure 7 is the sectional structure schematic view of the second piston, piston rod, circular ring and oil seal; Figure 6

[0039] Figure 8 is the sectional structure schematic view of the second piston, piston rod, circular ring and oil seal; Figure 6

[0040] The figure shows: 1, oil cylinder; 2, first piston; 3, isolating piece; 4, second piston; 5, left end cover; 6, right end cover; 7, connecting rod; 8, piston rod; 9, piston hole; 10, oil passing hole; 11, first valve core; 12, first elastic piece; 13, first through hole; 14, first rod; 15, second valve core; 16, second elastic piece; 17, second through hole; 18, second rod; 19, oil passing hole; 20, circular ring; 21, oil seal; 22, sealing ring; 23, isolating piston ring; 24, external thread; 25, internal thread; 26, sealing piston ring; 27, moving piston ring. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0042] The components of the embodiments of the present application described and shown in the drawings herein 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.

[0043] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] ​​​In the description of the utility model, it is necessary to explain that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the utility model, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0046] As shown in Figures 1-8 The utility model discloses a front fork oil pressure rod capable of quick locking and mute, which comprises a cylinder 1.

[0047] The first piston 2, the isolating piece 3 and the second piston 4 are movably and fitly installed in the cylinder 1, the left end cover 5 and the right end cover 6 are fixedly installed at two ends of the cylinder 1, the connecting rod 7 is fixedly installed between the left end cover 5 and the first piston 2, the outer end of the second piston 4 is fixedly installed with the piston rod 8, the piston hole 9 is formed in the right end cover 6, the outer end of the piston rod 8 is movably and fitly installed in the piston hole 9, and the isolating piece 3 is arranged between the first piston 2 and the second piston 4.

[0048] The first damping oil and high-pressure air are injected between the first piston 2 and the isolating piece 3 of the cylinder 1, the cylinder 1, the first piston 2, the left end cover 5, the connecting rod 7 and the first damping oil constitute a locking system, the second damping oil is injected between the second piston 4 of the cylinder 1 and the right end cover 6, and the cylinder 1, the second piston 4, the piston rod 8, the right end cover 5 and the second damping oil constitute a motion system, and the first piston 2 and the second piston 4 are both formed with the oil passing hole 10.

[0049] The principle is: the isolation piece 3 is arranged in the oil cylinder 1, which is used to separate the first damping oil and the second damping oil, the isolation piece 3 separates the locking system of the first piston 2 and the movement system of the second piston 4, the first damping oil of the locking system is filled as low viscosity and fast flow rate damping oil, so that the oil pressure rod can realize the quick locking effect; the movement system of the second piston 4 is filled with high viscosity and low flow rate second damping oil, which is used to reduce the noise generated by the movement of the second piston; the isolation piece 3 can avoid the interference of the low viscosity and fast flow rate first damping oil to the movement system, and also can avoid the interference of the high viscosity and low flow rate second damping oil to the locking system, so as to realize the functions of quick locking and low noise.

[0050] Further, the first valve core 11 is movably fitted in the first piston 2, the first elastic member 12 is abuttingly installed between the first valve core 11 and the first piston 2, the first valve core 11 blocks the oil hole 10 of the first piston 2, the first through hole 13 is formed in the connecting rod 7 and the left end cover 5, the first rod 14 is movably fitted in the first through hole 13, and the inner end of the first rod 14 abuts against the first valve core 11. When the first rod 14 abuts against the first valve core 11 and pushes, the first valve core 11 can block the oil hole 10, the first valve core 11 is stably locked, the bubbles generated in the first damping oil are discharged from the first damping oil, and the discharged bubbles are finally gathered between the left end cover 5 and the first piston 2 through the piston hole 9 of the first piston 2, so that the quick locking effect is achieved.

[0051] Optionally, the first elastic member 12 is a pagoda-shaped spring, so that the elastic reset of the first valve core 11 is more stable.

[0052] Further, the second valve core 15 is movably fitted in the second piston 4, the second elastic member 16 is abuttingly installed between the second valve core 15 and the second piston 4, the second valve core 15 blocks the oil hole 10 of the second piston 4, the second through hole 17 is formed in the piston rod 8, the second rod 18 is movably fitted in the second through hole 17, and the inner end of the second rod 18 abuts against the second valve core 15. After adjusting the position of the second rod 18, the second valve core 15 can be controlled to be close to or away from the oil hole 10, the valve flow is finely controlled, the damping effect of the second piston 4 can be controlled by changing the flow, the adjustment according to personal habits is facilitated, the stability when driving on a relatively flat road is ensured, and the riding comfort is higher.

[0053] Optionally, the second elastic member 16 is a pagoda-shaped spring, so that the elastic reset of the second valve core 15 is more stable.

[0054] Further, the second piston 4 is integrally provided with an oil passing hole 19; even if the second valve core 15 completely blocks the oil passing hole 10 of the second piston 4, the second damping oil can still flow in the oil passing hole 19, at this time, the flow is very low, and the effect of silent damping is achieved.

[0055] Further, the piston rod 8 is sequentially sleeved with a ring 20 and an oil seal 21, the ring 20 and the oil seal 21 are movably fitted in the oil cylinder 1, and the second damping oil is filled between the second piston 4 of the oil cylinder 1 and the ring 20; after the second piston 4 is installed, the second damping oil is filled in the oil cylinder 1, and then the ring 20 and the oil seal 21 are installed; the setting of the ring 20 can ensure the stable movement of the piston rod 8, and the setting of the oil seal 21 can effectively prevent oil leakage, thereby ensuring the damping effect of the front fork oil pressure rod.

[0056] Further, the left end cover 5 and the oil cylinder 1 are tightly fitted with a sealing ring 22; the leakage of the first damping oil can be effectively prevented, and the damping effect is ensured.

[0057] Further, the viscosity of the second damping oil is greater than that of the first damping oil; the two viscosities are provided, the viscosity of the first damping oil can achieve the effect of rapid locking, and the viscosity of the second damping oil can achieve the effect of silent damping.

[0058] Further, the outer side of the isolation piece 3 is sleeved with an isolation piston ring 23, and the isolation piece 3 is movably fitted in the oil cylinder 1 through the isolation piston ring 23; the isolation piece 3 can effectively separate the first damping oil and the second damping oil, and the mixing of the two damping oils is avoided, thereby achieving locking and silence.

[0059] Optionally, the isolation piece 3 is provided with at least one; the number of the isolation piece 3 can be rotated according to the actual isolation situation, and the phenomenon of mixing of the damping oils can be effectively avoided.

[0060] Further, the oil cylinder 1 adopts a hollow cylindrical tube 24.

[0061] Optionally, the outer sides of the left end cover 5 and the right end cover 6 are respectively formed with external threads 25, the two ends in the oil cylinder 1 are respectively formed with internal threads 26, and the external threads 25 are one-to-one correspondingly and screw-fitted in the internal threads 26; the installation can be achieved by screwing, and the damping oil can be supplemented in time after leakage, thereby facilitating actual use.

[0062] Optionally, the left end cover 5 and the right end cover 6 are respectively fixed on the two ends of the oil cylinder 1 by stamping; the first damping oil and the second damping oil can be respectively sealed on the two sides of the isolation piece 3 by stamping, and the stability of the entire front fork oil pressure rod can be ensured, and the front fork oil pressure rod is not easy to be damaged.

[0063] Optionally, the left end cover 5 and the right end cover 6 are respectively fixedly installed on the two ends of the oil cylinder 1 by ultrasonic welding; the first damping oil and the second damping oil can be respectively sealed on the two sides of the isolation piece 3 by ultrasonic welding, so that the stability of the whole front fork oil pressure rod can be ensured and the front fork oil pressure rod is not easy to be damaged.

[0064] Further, the outer side of the first piston 2 is sleeved with a sealing piston ring 26, the outer side of the second piston 4 is sleeved with a moving piston ring 27, the first piston 2 is movably fitted in the oil cylinder 1 through the sealing piston ring 26, and the second piston 4 is movably fitted in the oil cylinder 1 through the moving piston ring 27; so that the movement of the first piston 2 and the second piston 4 in the oil cylinder 1 is more stable, and the service life of the whole front fork oil pressure rod is ensured.

[0065] The overall working principle of the utility model is:

[0066] 1. The isolation piece 3 is arranged in the oil cylinder 1, the first damping oil flows at the first piston 2, the first damping oil has the characteristics of low viscosity and fast flow rate, and the air bubbles generated in the first damping oil are discharged from the first damping oil when the second piston 4 moves at high speed, so that the air bubbles are finally gathered between the left end cover 5 and the first piston 2 through the piston hole 9 of the first piston 2, and a rapid locking effect is achieved.

[0067] 2. The second damping oil flows at the second piston 4, the second damping oil has the characteristics of large viscosity and slow flow rate, on the one hand, the liquid flow rate of the second damping oil in the high-speed movement of the second piston 4 rod in the second damping oil can be reduced, the collision sound between the gas and the second damping oil is reduced, and the sound generated in the high-speed movement of the piston rod 8 is effectively reduced; on the other hand, the size fluctuation of the generated damping force can be effectively reduced, and the effect that the size of the generated damping force is always stable is achieved.

[0068] 3. In the assembly process, the air in the cavity between the right end cover 6 and the isolation piece 3 is discharged, so that the sound of the air and the liquid collision in the high-speed movement of the second piston 4 is reduced, and at the same time, the high-pressure gas is filled in the cavity between the left end cover 5 and the isolation piece 3, the high-pressure gas exerts pressure on the isolation piece 3, the isolation piece 3 exerts pressure on the second damping oil in the direction from the isolation piece 3 to the right end cover 6, so that the external gas is prevented from entering from the right end cover 6, the air between the isolation piece 3 and the right end cover 6 is reduced, and the effect that the sound of the air and the liquid collision in the high-speed movement of the second piston 4 is reduced is achieved.

[0069] The embodiment does not limit the shape, material, structure and the like of the utility model in any form, and any simple modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment all belong to the protection scope of the utility model technical scheme.

Claims

1. A front fork oil rod capable of quick locking and silence, comprising a cylinder; characterized in that: a first piston, a partition and a second piston are movably fitted in the cylinder; a left end cover and a right end cover are fixedly installed at both ends of the cylinder; a connecting rod is fixedly installed between the left end cover and the first piston; a piston rod is fixedly installed at the outer end of the second piston; a piston hole is formed in the right end cover; the outer end of the piston rod is movably fitted in the piston hole; and the partition is arranged between the first piston and the second piston; first damping oil and high-pressure air are filled between the first piston and the partition of the cylinder; second damping oil is filled between the second piston and the right end cover of the cylinder; and an oil passing hole is formed in each of the first piston and the second piston.

2. The quick-locking and silent front fork oil rod according to claim 1, characterized in that: A first valve core is movably fitted in the first piston; a first elastic member is abuttingly installed between the first valve core and the first piston; the first valve core blocks the oil passing hole of the first piston; a first through hole is formed in the connecting rod and the left end cover; a first rod is movably fitted in the first through hole; and the inner end of the first rod abuts against the first valve core.

3. A front fork oil rod capable of quick locking and mute according to any one of claims 1 or 2, characterized in that: A second valve core is movably fitted in the second piston; a second elastic member is abuttingly installed between the second valve core and the second piston; the second valve core blocks the oil passing hole of the second piston; a second through hole is formed in the piston rod; a second rod is movably fitted in the second through hole; and the inner end of the second rod abuts against the second valve core.

4. The quick-locking and silent front fork oil rod according to claim 3, characterized in that: An oil passing fine hole is integrally formed on the second piston.

5. The quick-locking and silent front fork oil rod according to claim 1, wherein: A circular ring and an oil seal are sequentially installed on the piston rod; the circular ring and the oil seal are movably fitted in the cylinder; and the second damping oil is filled between the second piston and the circular ring of the cylinder.

6. A front fork oil rod capable of quick locking and mute according to any one of claims 1 or 5, characterized in that: A sealing ring is tightly fitted between the left end cover and the cylinder.

7. The quick-locking and silent front fork oil rod according to any one of claims 1, 2 or 4, characterized in that: The viscosity of the second damping oil is greater than that of the first damping oil.

8. A front fork oil rod capable of quick locking and mute according to claim 7, characterized in that: A sealing piston ring is installed on the outer side of the first piston; a moving piston ring is installed on the outer side of the second piston; the first piston is movably fitted in the cylinder through the sealing piston ring; and the second piston is movably fitted in the cylinder through the moving piston ring.

9. The quick-locking and silent front fork oil rod according to claim 1, wherein: A partition piston ring is installed on the outer side of the partition; and the partition is movably fitted in the cylinder through the partition piston ring.

10. The quick-locking and silent front fork oil rod according to claim 1, wherein: The cylinder is a hollow cylindrical tube.

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