An oil compensation mechanism and a horizontal shock absorber

Abstract

The present invention discloses an oil compensation mechanism and a horizontal shock absorber, including: an inner cylinder, which serves as a working space to accommodate a piston rod and a piston valve; a storage chamber, which is arranged between the inner cylinder and an outer cylinder to form an oil storage space of the shock absorber; and is characterized in that it further includes: an oil storage groove arranged on the outer cylinder, the oil storage groove is communicated with the oil storage chamber to further increase the oil storage capacity in the shock absorber; a control valve arranged at one end of the shock absorber, the control valve is communicated with the inner cylinder and the oil storage groove to conduct gas-liquid separation on the flowing oil. By arranging a control valve on the structure of a conventional double-tube shock absorber to change the flow path of the oil under different working conditions, and cooperating with the oil storage groove arranged on the outer cylinder, on the one hand, it avoids the problems of untimely oil replenishment and empty stroke caused by oil bubbles during the operation of the horizontal shock absorber, and on the other hand, it can also realize the platform promotion of this mechanism on the horizontal shock absorber.

Description

Technical Field

[0001] The present invention relates to the field of vehicle shock absorbers, and particularly to an oil compensation mechanism and a horizontal shock absorber. Background Art

[0002] The structure of a vehicle horizontal shock absorber is different from that of a common vertical shock absorber. Affected by the horizontal placement of the shock absorber, most of the shock absorber oil is concentrated at the lower part of the shock absorber, and it is easy to form a large number of bubbles due to the mixing of air in the oil, resulting in the problem of empty stroke during the operation of the shock absorber.

[0003] In response to the above technical problems, a common solution in the industry is to fill a rubber air bag 110 in a storage chamber 120 between an outer cylinder 100 and an inner cylinder 200. Utilizing the compression and extension performance of the rubber air bag 110, the space in the storage chamber 120 is filled during the reciprocating movement of the piston rod 210. However, this design will increase the space between the outer cylinder 100 and the inner cylinder 200, affecting the internal layout of the shock absorber and making it difficult to achieve a platform design. In addition, the product stability of this solution depends to a large extent on the quality control of the purchased part - the rubber air bag, increasing the quality control risk of the product. Summary of the Invention

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] An oil compensation mechanism, comprising:

[0006] An inner cylinder, which serves as a working space to accommodate a piston rod and a piston valve;

[0007] A storage chamber, which is arranged between the inner cylinder and the outer cylinder to form an oil storage space of the shock absorber;

[0008] It further comprises:

[0009] An oil storage groove provided on the outer cylinder, which is communicated with the oil storage chamber to further increase the oil storage capacity in the shock absorber;

[0010] A control valve provided at one end of the shock absorber, which is communicated with the inner cylinder and the oil storage groove to separate gas and liquid from the flowing oil.

[0011] In a preferred embodiment of the present invention,

[0012] The control valve is provided with a first through hole and a slide valve mechanism, the slide valve mechanism is located above the first through hole, and the slide valve mechanism is a one-way valve that only allows oil to enter the control valve from the inner cylinder side.

[0013] In a preferred embodiment of the present invention,

[0014] On the other side of the spool mechanism, there is a valve cavity. After the gas and liquid oil pass through the spool mechanism, they enter the valve cavity, and the liquid moves downward along the inner wall of the valve cavity under gravity and separates from the gas.

[0015] The control valve is also provided with a second through hole, and the valve cavity is connected to the storage chamber through the second through hole.

[0016] In a preferred embodiment of the present invention, the spool mechanism is composed of a valve pin and a valve disc;

[0017] When the piston rod makes a compression movement, the oil impacts the valve disc from one side of the inner cylinder and pushes open the valve pin to enter the valve cavity;

[0018] When the piston rod makes a tensile movement, the gas impacts the valve disc from one side of the valve cavity and presses the valve pin together.

[0019] In a preferred embodiment of the present invention, the spool mechanism is fixed to the end of the shock absorber through a support, and the support separates the valve cavity and forms an annular cavity on the periphery. The valve cavity is connected to the second through hole through the annular cavity.

[0020] In a preferred embodiment of the present invention,

[0021] A connection port is provided on the oil storage tank, and the connection port is communicated with the spool mechanism;

[0022] The first through hole is connected to the oil storage tank through a pipeline, and the pipeline passes through the connection port and enters the oil storage tank.

[0023] In a preferred embodiment of the present invention, at least one connection hole is further provided between the oil storage tank and the outer cylinder, and the connection hole is used for the oil exchange between the storage chamber and the oil storage tank.

[0024] In a preferred embodiment of the present invention, the sum of the cross-sectional areas of the passages of the connection hole and the connection port is greater than the sum of the cross-sectional areas of the passages of the pipeline.

[0025] In a preferred embodiment of the present invention, a baffle is further provided on one side of the oil storage tank, and the baffle blocks the oil from flowing to the end far from the oil storage tank.

[0026] In a preferred embodiment of the present invention, the baffle is located at the lower part of the oil storage chamber, and a concave portion is provided on the baffle, and the concave portion enables the lower part of the oil storage chamber to still have fluidity.

[0027] A horizontal shock absorber includes the above-mentioned oil compensation mechanism.

[0028] The beneficial effects of the present invention are as follows:

[0029] The oil compensation mechanism and the horizontal shock absorber provided by the present invention set a control valve on the structure of a conventional double-tube shock absorber to change the flow path of the oil under different working conditions, and cooperate with an oil storage tank arranged on the outer cylinder. On the one hand, it avoids the problems of untimely oil replenishment and empty stroke caused by oil bubbles during the operation of the horizontal shock absorber, and on the other hand, it can also realize the platform promotion of this mechanism on the horizontal shock absorber. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0031] Figure 1 It is a schematic diagram of the prior art of the present invention.

[0032] Figure 2 It is an axonometric view of the present invention.

[0033] Figure 3 It is a sectional view of the present invention.

[0034] Figure 4 It is a partial enlarged view of the control valve of the present invention.

[0035] Figure 5 It is the Figure 4 other side view of the present invention.

[0036] Figure 6 It is a schematic diagram of the adjacent surface structure of the control valve of the present invention.

[0037] Figure 7 It is the Figure 6 other side view of the present invention.

[0038] Figure 8 It is a schematic diagram of the oil flow when the piston rod of the present invention is in the tensile state.

[0039] Figure 9 It is a schematic diagram of the oil flow when the piston rod of the present invention is in the compressed state.

[0040] Figure 10 It is a partial enlarged view of the baffle and the oil storage tank of the present invention Detailed Embodiments

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. The above description is for the convenience of describing the present invention and simplifies the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention.

[0042] As used in the specification, the singular forms "a", "the", and "said" include the plural forms unless clearly indicated otherwise. The terms "comprising", "including", and "having" as used in the specification denote the presence of the claimed features, but do not preclude the presence of one or more other features. The term "and / or" as used in the specification includes any and all combinations of one or more of the associated listed items.

[0043] In the specification, when an element is said to be "on", "fixed" to, "connected" to, "coupled" to, etc. another element, the element can be directly on, fixed to, connected to, joined to, or in contact with the other element, or intervening elements may be present. In the specification, when a feature is arranged "adjacent" to another feature, it may mean that the feature has a portion overlapping with the adjacent feature or a portion above or below the adjacent feature.

[0044] It will be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of the concept of the present application.

[0045] Exemplary embodiments of the present application will be described hereinafter with reference to the accompanying drawings. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. In all the drawings, the same reference numerals denote the same or functionally identical elements.

[0046] Reference Figure 2 to the oil compensation mechanism and the horizontal shock absorber, an oil storage tank 300 is fixed to the lower side of the outer cylinder 100, and by expanding the storage capacity of the oil in the shock absorber, the problem of empty stroke caused by the mixture of oil and gas during the operation of the shock absorber is prevented.

[0047] Reference Figures 3 to 7 , a control valve 400 communicating with the oil storage chamber 120 in the inner cylinder 200 and the outer cylinder 100 is fixed to the end of the shock absorber. One side of the control valve 400 is connected to the inner cylinder 200, and the other side is isolated to form an independent valve chamber 430 space. By controlling the control valve 400, the flow path of the oil flowing back and forth between the inner cylinder 200 and the oil storage chamber 120 under the compression / tension conditions of the piston rod is controlled to achieve the function of separating the flow of oil and gas. The control valve 400 mainly consists of a spool mechanism, a support 460, and a first through hole 440. A valve hole 480 is provided on the adjacent surface of the control valve 400 and the inner cylinder 100 ( Figure 6) A valve pin 420 passes through a valve plate 410 and is inserted into a valve hole 480 to form a spool mechanism for a one-way passage. A support 460 fixes the control valve 400 at the end of the shock absorber and forms an annular chamber 470 on the outer periphery of the valve chamber 430( Figure 4 ) A pair of second through holes 490 are also provided at the outer peripheral position of the adjacent surface. The pair of second through holes 490 communicate the annular chamber 470 and the oil storage chamber 120. The valve hole 480 is located at the axial center position of the control valve 400, and the first through hole 440 is located below the valve hole 480.

[0048] A plurality of connection holes 320 and connection ports 310 are provided on the connection wall 330 connecting the oil storage tank 300 and the outer cylinder 100. The connection holes 320 communicate the oil storage tank 300 and the oil storage chamber 120, and the annular chamber 470 communicates with the oil storage tank 300 through the connection port 310. A pipeline 450 passes through the connection hole 310 to communicate the first through hole 400 and the oil storage tank 300. In order to ensure that the oil can flow smoothly through the pipeline 450, the total flow cross-sectional area of the connection holes 320 and the connection ports 310 is designed to be larger than the flow cross-sectional area of the pipeline 450.

[0049] A baffle 340 is fixed to the lower part of the annular oil storage chamber 120. A concave portion 341 is provided on the upper side of the baffle 340, so that the baffle 340 does not completely block the cross-section of the lower part of the oil storage chamber 120, and the oil can still flow through the concave portion 341.

[0050] Combined with reference Figures 8 to 10 , when the piston rod 210 makes a tensile movement. The oil flows from the oil storage tank 300 through the pipeline 450 and the first through hole 440 into the inner cylinder 200 in the direction of the arrow. When the liquid level in the oil storage tank 300 drops, the oil in the oil storage chamber 210 is quickly replenished into the oil storage tank 300 through the connection holes 320 and the connection ports 310. Since the cross-sectional areas of the connection holes 320 and the connection ports 310 are larger than the cross-sectional area of the pipeline 450, the replenishment speed of the oil in the oil storage tank 300 is always greater than the outflow speed, preventing the situation where air is forcibly sucked in and mixed with the oil.

[0051] When the piston rod 210 makes a compression movement. The oil flows back through two paths of the first through hole 440 and the spool mechanism. Since the first through hole 440 is located below the valve hole 480, the oil always preferentially flows into the first through hole 440. Part of the high-pressure oil and gas mixture will enter the valve chamber 430 through the spool mechanism. The oil in the mixture gradually flows down and converges along the wall surface of the valve chamber 430 under the action of gravity, and finally flows into the oil storage tank 300 through the connection port 310. The gas in the mixture passes through the second through hole 490 (combined Figure 6)Enter the upper part of the oil storage chamber 120. As the oil level in the oil storage tank 300 gradually rises, when the height H of the oil is higher than the sum of the depth h1 of the oil storage tank 300 and the thickness h2 of the baffle 340, the oil will overflow the baffle 340 and be further stored in the oil storage chamber 120.

Claims

1. Oil compensation mechanism, comprising: Inner cylinder, which serves as a working space to accommodate the piston rod and piston valve; Oil storage chamber, which is arranged between the inner cylinder and the outer cylinder to form an oil storage space of the shock absorber; It is characterized in that it further comprises: An oil storage groove provided on the outer cylinder, and the oil storage groove is communicated with the oil storage chamber to further increase the oil storage capacity in the shock absorber; A control valve provided at one end of the shock absorber, and the control valve is communicated with the inner cylinder and the oil storage groove to separate gas and liquid from the flowing oil; The control valve comprises a spool mechanism, a support, a first through hole, and a second through hole. The support fixes the control valve at the end of the shock absorber and forms an annular chamber on the outer periphery of the valve cavity; It further comprises a baffle provided on one side of the oil storage groove, and the baffle blocks the oil from flowing to the end far away from the oil storage groove; the baffle is located at the lower part of the oil storage chamber, and a concave part is provided on the baffle. The concave part does not completely block the cross-section of the lower part of the oil storage chamber, so that the lower part of the oil storage chamber still has fluidity, and the oil can still flow through the concave part; A plurality of connection holes and connection ports are provided on the connection wall between the oil storage groove and the outer cylinder. The connection holes communicate the oil storage groove with the oil storage chamber, and the annular chamber is communicated with the oil storage groove through the connection port; a pipeline passes through the connection hole to communicate the first through hole and the oil storage groove; the total flow cross-sectional area of the connection hole and the connection port is designed to be larger than the flow cross-sectional area of the pipeline; When the piston rod makes a tensile movement, the oil flows from the oil storage groove into the inner cylinder through the pipeline and the first through hole. When the liquid level height in the oil storage groove drops, the oil in the oil storage chamber quickly replenishes the oil storage groove through the connection hole and the connection port, and the replenishment speed of the oil in the oil storage groove is always greater than the outflow speed, preventing the situation that air is forcibly drawn in and mixed with the oil; When the piston rod makes a compression movement, the oil flows back through two paths of the first through hole and the spool mechanism, and the oil always preferentially flows into the first through hole. Part of the high-pressure oil and gas mixture will enter the valve cavity through the spool mechanism; the oil in the mixture gradually flows down along the wall of the valve cavity under the action of gravity and converges, and finally flows into the oil storage groove through the connection port. The gas in the mixture enters the upper part of the oil storage chamber through the second through hole. As the oil in the oil storage groove gradually rises, when the oil height H is higher than the sum of the depth of the oil storage groove and the thickness of the baffle, the oil will cross the baffle and be further stored in the oil storage chamber.

2. The oil compensation mechanism according to claim 1, characterized in that, The spool mechanism is located above the first through hole, and the spool mechanism is a one-way valve that only allows oil to enter the control valve from the inner cylinder side.

3. The oil compensation mechanism according to claim 2, characterized in that, A valve cavity is provided on the other side of the spool mechanism. Gas and liquid oil enter the valve cavity after passing through the spool mechanism, and the liquid moves downward along the inner wall of the valve cavity under the action of gravity to separate from the gas; the valve cavity is connected to the oil storage chamber through the second through hole.

4. The oil compensation mechanism according to claim 3, characterized in that, The spool mechanism is composed of a valve pin and a valve disc; when the piston rod makes a compression movement, the hydraulic oil impacts the valve disc from one side of the inner cylinder and pushes open the valve pin to enter the valve cavity; when the piston rod makes a tensile movement, the gas impacts the valve disc from one side of the valve cavity and presses the valve pin together.

5. The oil compensation mechanism according to claim 3, characterized in that, The spool mechanism is fixed to the end of the shock absorber through a support, the support separates the valve cavity and forms an annular cavity on the outer periphery, and the valve cavity is connected to the second through hole through the annular cavity.

6. Horizontal shock absorber, characterized in that, It includes the hydraulic oil compensation mechanism according to any one of claims 1 to 5.

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