CN201106653Y - Shock absorber - Google Patents

Abstract

A shock absorber includes: a cylinder tube unit, an oil-gas separation valve, and a piston unit. The cylinder tube unit includes an outer tube. The oil-gas separation valve is movably installed in the outer tube to separate and define a gas space and a liquid space. The piston unit includes a piston installed in the liquid space, a piston rod connected to the piston, and a liner ring sleeved on the periphery of the piston, the liner ring having a liner ring body, and at least one channel axially recessed from the outer peripheral surface of the liner ring body. When the piston unit moves, part of the oil will automatically pass through the channel with the oil pressure. Therefore, the utility model uses the channel design on the liner ring to allow the oil to automatically enter and exit the channel with the movement, so as to maintain the oil density in the liquid space, so as to achieve the effect of no noise during movement.

Description

Shock Absorbers

technical field

The utility model relates to a shock absorber, in particular to a shock absorber which is fixedly connected between a seat cushion and a frame of a bicycle, in which a liquid space and a gas space are matched with each other to absorb shock, so as to provide the shock absorbing effect of the seat cushion. Shock Absorbers.

Background technique

As shown in FIG. 1 , a conventional shock absorber 1 includes: a cylinder tube unit 11 , an oil-air separation valve 12 , a guide 13 , and a piston unit 14 . The cylinder tube unit 11 includes a hollow and upright outer tube 111 , a coupling seat 112 fixed on the bottom of the outer tube 111 , and an oil seal seat 113 fixed on the top of the outer tube 111 . The oil-gas separation valve 12 is mounted in the outer tube 111 with an axially movable airtight plug, and separates the outer tube 111 to define a gas space 114 at the bottom and a liquid space 115 at the top. The guide 13 is fixedly installed in the liquid space 115 and is adjacent to the oil seal seat 113 .

The piston unit 14 includes a piston 141 axially movably installed in the liquid space 115 , and a piston rod 142 connected to the piston 141 and passing through the guide 13 and the oil seal seat 113 . The piston 141 separates the liquid space 115 into a first oil storage area 116 adjacent to the oil-air separation valve 12 and a second oil storage area 117 adjacent to the guide 13 .

The piston 141 has a mounting hole 143 axially penetrating through the top, a first channel 144 formed at the bottom and communicating with the mounting hole 143 and the first oil storage area 116, and a plurality of first channels 144 radially penetrated at intervals. to the second channel 145 of the second oil storage section 117 . The piston rod 142 has a threaded hole 146 axially formed in an end away from the piston 141 , and a receiving hole 147 extending downward from the threaded hole 146 to axially communicate with the installation hole 143 .

And the piston unit 14 also includes a control pin 141 axially movably installed in the mounting hole 143, an actuating rod 142 extending through the accommodating hole 147 and leaning against the control pin 141, and a A screw 143 is screwed in the screw hole 146 so as to be axially movable.

Before use, the screw 143 can be rotated to drive the action rod 142 to control the control pin 141 to move closer to or away from the first and second passages 144, 145 to adjust the pressure of the shock absorber 1. Here, the control pin 141 is mainly used to completely The first and second passages 144 and 145 are blocked to make them disconnected. When the shock absorber 1 is subjected to an external force, the piston unit 14 will move downward as shown in Figure 2, so that the oil in the first oil storage area 116 is squeezed, pushing the oil-air separation valve 12 to move downward to the compressed gas space 114 When the external force disappears, the restoring force of the gas accumulated in the gas space 114 can push the oil-gas separation valve 12 to reset, and at the same time, the oil in the first oil storage area 116 can be used to drive the piston unit 14 to move upward. , to buffer the vibration caused by external force.

Although the above-mentioned shock absorber 1 can cushion the shock by the movement of the piston unit 14 and the oil-air separation valve 12, when the piston 141 moves downward, the space of the second oil storage section 117 becomes larger, which will make it possible to store other oil. The density of the oil inside becomes relatively smaller, and the oil will accumulate in the lower part adjacent to the piston 141 along the flow, and an oil-free space will be formed above it, so when the piston 141 resets and moves upward, and the second oil storage area 117 When the space in the shock absorber becomes smaller, the oil below will pass through the space and directly hit the guide 13, causing noise. This is an unsatisfactory part of the design of the conventional shock absorber 1, which still needs to be improved.

Utility model content

The main purpose of the utility model is to provide a shock absorber that can eliminate noise.

A shock absorber of the utility model comprises: a cylinder pipe unit, an oil-gas separation valve, and a piston unit.

The cylinder tube unit includes a hollow outer tube with a first opposite end and a second end.

The oil-gas separation valve is installed in the outer tube axially movable to define a gas space with the first end and a liquid space with the second end.

The piston unit includes a piston axially movably installed in the liquid space and adjacent to the second end of the outer tube, a piston rod connected to the piston and protruding from the second end, and a ring sleeved on the periphery of the piston. The liquid space is divided into a first oil storage area adjacent to the oil-gas separation valve and a second oil storage area adjacent to the second end. A channel is recessed inward and communicates with the first and second oil storage intervals.

The piston unit can move between a normal position and a compression position relative to the cylinder tube unit. When an external force is applied, the piston unit will move from the normal position to the compression position in the direction of the oil-air separation valve, so that the first oil storage area The oil is squeezed, and part of the oil will automatically flow into the second oil storage area through the passage of the lining ring. When the external force disappears, the piston unit will move to the second end and return to the normal position, so that the second oil storage area The oil in the oil interval is squeezed, and now part of the oil in the second oil storage interval will automatically flow back to the first oil storage interval through the passage of the lining ring.

The beneficial effect of the utility model is that: by virtue of the channel design on the lining ring, the oil can automatically enter and exit the channel with the movement, so as to maintain the oil density in the liquid space, and no noise will be generated during the action. effect.

Description of drawings

Fig. 1 is a combined cross-sectional schematic diagram of a conventional shock absorber, illustrating that a piston unit is in a normal position;

Figure 2 is a view similar to Figure 1, illustrating the piston unit in a compressed position;

Fig. 3 is a three-dimensional exploded view of a preferred embodiment of the shock absorber of the present invention;

Fig. 4 is a combined sectional schematic view of the preferred embodiment, illustrating a piston unit in a normal position;

Fig. 5 is a partially enlarged view of Fig. 4;

Figure 6 is a view similar to Figure 5, illustrating the piston unit in a compressed position.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

As shown in Fig. 3, Fig. 4 and Fig. 5, the preferred embodiment of the shock absorber of the present invention is fixedly installed between a cushion (not shown) and a frame (not shown) of a bicycle, and includes : a cylinder tube unit 2, an oil-gas separation valve 3, a pilot 4, and a piston unit 5.

The cylinder tube unit 2 includes a hollow upright outer tube 21 , the outer tube 21 has a first end 211 located below, and a second end 212 opposite to the first end 211 . The cylinder tube unit 2 also includes a coupling seat 22 fixed on the first end 211 of the outer tube 21 and fixedly connected to the framework, and an oil seal seat 23 fixedly combined on the second end 212 of the outer tube 21 .

The oil-gas separation valve 3 is installed in the outer tube 21 in an axially movable manner, so as to define an airtight gas space 31 with the connecting seat 22 of the first end 211, and to define an airtight space 31 with the oil seal seat 23 of the second end 212. A liquid space 32 not communicating with the gas space 31.

The guide 4 is fixedly installed in the liquid space 32 and adjacent to the oil seal seat 23 of the second end 212 .

The piston unit 5 includes a piston 51 axially movable installed in the liquid space 32 and located between the guide 4 and the oil-gas separation valve 3, a connecting piston 51 and passing through the guide 4 and the second end The piston rod 52 of 212, and a ring ring 53 that is enclosed within the piston 51 periphery. The piston 51 separates the liquid space 32 into a first oil storage area 321 adjacent to the oil-air separation valve 3 and a second oil storage area 322 adjacent to the guide 4 .

The piston 51 has a plugging portion 511 that is sealingly plugged in the outer tube 21, a shaft sleeve portion 512 extending upward from the plugging portion 511 to the guide 4 and having a smaller diameter than the plugging portion 511, and a shaft. To the installation hole 513 that passes through the sleeve portion 512, the first channel 514 that axially penetrates the plug pressing portion 511 and communicates with the installation hole 513 and the first oil storage section 321, and a plurality of radially penetrates the sleeve portion 512 and communicates The first passage 514 and the second passage 515 of the second oil storage area 322 . The piston rod 52 has a screw hole 521 axially formed in an end away from the piston 51 , and an accommodating hole 522 extending axially from the screw hole 521 toward the piston 51 and communicating with the installation hole 513 . In terms of design, the number of the second channel 515 can be one, two or more than two. The ring 53 has a ring body 531 nested in the annular groove 516 of the plugging portion 511, and at least one ring body 531 is recessed axially from the outer peripheral surface of the ring body 531 and communicates with the first and second oil reservoirs. Channel 532 of interval 321,322. In this embodiment, the cross section of the ring body 531 is square, and of course it can also be circular, elliptical or other shapes in design, and will not be described in detail here.

The piston unit 5 also includes a control pin 54 axially movably installed in the mounting hole 513, an actuating rod 55 extending through the accommodating hole 522 and leaning against the control pin 54, and a The screw 56 in the screw hole 521 is screwed axially movable. It should be further explained that at least one O-ring made of rubber or silicone is sleeved on the periphery of the shock absorber on the coupling seat 22, the oil seal seat 23, the oil-gas separation valve 3, and the control pin 54. Ring 6, which has the function of air seal or oil seal, will not be described here.

The gas space 31 is filled with air, and the liquid space 32 is filled with oil. Before use, the pressure of the shock absorber can be adjusted depending on the weight of the user or the road conditions, that is, the rotating screw 56 drives the action rod 55 to control the control pin 54 to move closer to or away from the first and second channels 514 and 515 for The size of the communication gap between the two channels 514 and 515 is controlled, but this is not the key point of the present invention, so it will not be described in detail here.

When in action, the piston unit 5 can move between a normal position and a compressed position relative to the cylinder tube unit 2. When the shock absorber is subjected to an external force, the piston unit 5 will move from the normal position shown in Fig. 4 and Fig. 5 to the oil and gas. The direction of the separation valve 3 is moved to the compression position as shown in Figure 6, so that the oil in the first oil storage section 321 is squeezed, and some oil will automatically flow into the second oil storage section 322 through the channel 532 of the bushing 53 . When the external force disappears, the piston unit 5 will move to the second end 212 and return to the normal position, so that the oil in the second oil storage area 322 is squeezed, and at this time, part of the oil in the second oil storage area 322 , it will automatically flow back to the first oil storage area 321 through the channel 532 of the lining ring 53 .

It can be seen from the above description that the design of the shock absorber of the present invention is mainly to provide a channel 532 in the lining ring 53, so that the oil can automatically enter and exit the channel 532 as it moves, so as to maintain the oil density in the liquid space 32, Noise will not be produced, so the utility model can achieve the effect that no noise will be produced during the action, and the purpose of the utility model can indeed be achieved.

Claims (5)

1. shock absorber, comprise: an earthen pipe unit that comprises the outer tube of a hollow, the Oil-gas Separation valve that can be installed in the outer tube with moving axially, and piston unit, this outer tube has one first opposite end, and one second end, define a gas space between this Oil-gas Separation valve and first end, and and second end between define a fluid space, this piston unit comprises that one can be installed in the fluid space and the piston of second end of contiguous outer tube with moving axially, a piston rod that connects the piston and second end that stretches through out, reach the lining ring of a snare at the piston periphery, this piston is separated out fluid space between first reserve of a contiguous Oil-gas Separation valve, and between second reserve of vicinity second end, it is characterized in that: this lining ring has a lining ring body, and at least one axially is arranged with toward in and is communicated with first by the outer circumferential face of lining ring body, passage between two reserves.

2. shock absorber as claimed in claim 1 is characterized in that: the section of the lining ring body of this lining ring is square.

3. shock absorber as claimed in claim 1 or 2, it is characterized in that: this piston has one and plugs plug splenium in this outer tube, one and extended and diameter is smaller than the shaft sleeve part of plug splenium, mounting hole that axially runs through this shaft sleeve part, one and axially runs through the plug splenium and be communicated with first passage between the mounting hole and first reserve toward second end by the plug splenium, reach at least one radially connect shaft sleeve part and be communicated with first passage and second reserve between second channel.

4. shock absorber as claimed in claim 3, it is characterized in that: this piston rod has one and axially is formed on away from the screw in the end of piston, and one by screw toward the axis of orientation of piston to the receiving hole that runs through and be communicated with mounting hole, and this piston unit comprises that also one can be installed in control pin in the mounting hole, one with moving axially and stretches through in this receiving hole and be resisted against actuating strut on this control pin, reaches the screw that can be screwed onto in this screw with moving axially.

5. shock absorber as claimed in claim 1 is characterized in that: this shock absorber also comprises a guide that is fixedly mounted in this fluid space and is close to second end.

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