One-way valve of automobile hydraulic retarder

Abstract

The utility model relates to a one-way valve of an automobile hydraulic retarder, which belongs to the technical field of hydraulic retarders and comprises a valve body, an upper cover and a valve seat. An oil inlet hole is formed in the bottom of the valve seat; the upper cover is connected to the upper portion of the valve seat, an oil inlet cavity is reserved between the upper cover and the valve seat, and an oil outlet hole is formed in the upper cover. A spring is arranged on the valve body, the diameter of the lowest end of the valve body is larger than that of the oil inlet hole, and the lowest end of the valve body is attached to the periphery of the oil inlet hole. And the upper section of the valve body penetrates through the upper cover and is slidably sleeved with the upper cover. When the side pressure of the valve seat is small, the valve body clings to the oil inlet hole to block the oil inlet hole; on the contrary, the valve body moves upwards, the oil inlet hole is opened, and retarder oil flows from bottom to top; in this way, one-way flowing of retarder oil is achieved, and the oil outlet holes formed in the upper cover can meet the requirement for large-flow passing of the retarder oil. The one-way flow of the retarder oil is met, meanwhile, the requirement for large flow of the retarder oil is met, and the hydraulic retarder can be widely applied to trucks provided with hydraulic retarders.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic retarders, and in particular relates to a one-way valve for an automobile hydraulic retarder. Background Art

[0002] The function of a car's hydraulic retarder is to enable the retarder when the car is decelerating or going down a long slope, so that the car can decelerate smoothly and avoid the wear and heat of the brake parts caused by the use of brakes. The hydraulic retarder is a device that uses liquid damping to produce a retarding effect, thereby slowing down the vehicle. Installing a hydraulic retarder in the transmission system of a truck has become an urgent need for truck manufacturers and users. The retarder oil of the hydraulic retarder needs to circulate in a fixed direction. A one-way valve that controls the flow direction needs to be installed in this circulation loop. When the retarder is braking, a large amount of retarder oil needs to be filled between the stator and the rotor in a short time. The retarder oil circulation loop requires a large flow rate, and ordinary one-way valves cannot meet the above requirements. Utility Model Content

[0003] In order to overcome the problems existing in the background technology, the utility model provides a one-way valve for an automobile hydraulic retarder, which can meet the demand for a large flow rate of the retarder oil while satisfying the one-way flow of the retarder oil, and can be widely used in trucks equipped with hydraulic retarders.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] The automobile hydraulic retarder one-way valve comprises a valve body, an upper cover and a valve seat; an oil inlet hole is provided at the bottom of the valve seat; the upper cover is connected to the top of the valve seat, an oil inlet cavity is left between the upper cover and the valve seat, and an oil outlet hole is provided on the upper cover; a spring is provided on the valve body, the diameter of the lowest end of the valve body is larger than the oil inlet hole, and the lowest end of the valve body fits the outer periphery of the oil inlet hole; the upper section of the valve body passes through the upper cover and is slidably connected with the upper cover.

[0006] Preferably, the upper cover is a four-section stepped circular cylinder structure, which, from top to bottom, are an upper ring column, a middle upper ring column, a middle lower ring column and a lower ring column, wherein the outer diameter of the upper ring column is the smallest, and the inner diameters of the upper ring column and the middle upper ring column are the same; the outer diameter of the middle lower ring column is the largest, and the inner diameters of the middle lower ring column and the lower end ring column are the same; the oil outlet hole is opened on the middle upper ring column and vertically penetrates the middle upper ring column.

[0007] Preferably, the valve body is a three-section cylindrical structure, which is an upper cylinder, a middle cylinder and a lower cylinder from top to bottom; the upper cylinder has the smallest diameter and the lower cylinder has the largest diameter; wherein,

[0008] The bottom end surface of the lower cylinder fits the outer circumference of the oil inlet hole, and its diameter is larger than the diameter of the oil inlet hole; the upper cylinder is slidably sleeved with the upper ring column; the outer diameters of the middle cylinder and the lower cylinder are smaller than the inner diameters of the middle-upper ring column, the middle-lower ring column and the lower ring column; the spring is arranged on the valve body and is arranged between the middle-upper ring column and the lower cylinder.

[0009] Preferably, the valve seat is a circular cylindrical structure, and the outer side of the valve seat is a two-stage step structure; the inner side of the valve seat is a three-stage step structure with an inner diameter decreasing from top to bottom, namely the upper step, the middle step and the lower step; the lower cylinder fits with the lower step of the valve seat.

[0010] Preferably, the lower ring column is provided with an external thread; the upper step of the valve seat is provided with an internal thread, and the lower ring column and the upper step are threadedly connected.

[0011] Preferably, a back-off groove is machined on the lower end of the internal thread of the valve seat.

[0012] Preferably, eight oil outlet holes are provided, and the oil outlet holes are evenly distributed along the axis circumference of the middle and upper ring column.

[0013] Beneficial effects of the utility model:

[0014] The structural design and connection relationship between the valve body, the upper cover and the valve seat of the utility model form a larger oil inlet chamber, and combined with the design of eight oil outlet holes, it can meet the need for a large flow rate of the retarder oil while satisfying the unidirectional flow of the retarder oil, and can be widely used in trucks equipped with hydraulic retarders. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the overall structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 A top view of

[0017] Figure 3 It is a cross-sectional view of the valve body of the utility model when it is opened;

[0018] In the figure, 1-valve body, 2-upper cover, 3-spring, 4-valve seat, 5-oil inlet hole, 6-oil outlet hole, 7-oil inlet chamber. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians.

[0020] In the description of the present invention, unless otherwise specified, the terms "inside", "outside", "upper", "lower", etc. indicate positions or state relationships based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0022] like Figure 1-3 As shown, the automobile hydraulic retarder one-way valve comprises a valve body 1, an upper cover 2, a spring 3 and a valve seat 4.

[0023] The upper cover 2 is a four-stage stepped circular cylinder structure, which is an upper ring column, a middle upper ring column, a middle lower ring column and a lower ring column from top to bottom. Among them, the outer diameter of the upper ring column is the smallest, and the inner diameters of the upper ring column and the middle upper ring column are the same; the outer diameter of the middle lower ring column is the largest, and the inner diameters of the middle lower ring column and the lower end ring column are the same. Eight oil outlet holes 6 are opened on the upper ring column, and the eight oil outlet holes vertically penetrate the middle upper ring column and are evenly distributed along the axis of the middle upper ring column. The outer wall of the lower ring column is provided with external threads.

[0024] The valve seat 4 is a circular columnar structure, the outer side of the valve seat 4 is a two-stage step structure, and the inner side of the valve seat 4 is a three-stage step structure with inner diameters decreasing from top to bottom, which are the upper step, the middle step and the lower step. The upper step is provided with an internal thread, and the upper cover 2 and the valve seat 4 are connected by threads through the lower ring column and the upper step. After connection, the contact surface of the lower ring column and the upper step forms a sealing surface.

[0025] The valve body 1 is a three-section cylindrical structure, which includes, from top to bottom, an upper section cylinder, a middle section cylinder and a lower section cylinder; the upper section cylinder has the smallest diameter and the lower section cylinder has the largest diameter; wherein, the bottom end surface of the lower section cylinder fits with the outer periphery of the oil inlet hole 5, and its diameter is larger than the diameter of the oil inlet hole 5. When the lower section cylinder fits with the oil inlet hole 5, the oil inlet hole is blocked; when the lower section cylinder leaves the oil inlet hole 5, the oil inlet hole is opened.

[0026] The upper cylinder is slidably sleeved in the upper ring column, the outer diameters of the middle cylinder and the lower cylinder are smaller than the inner diameters of the middle upper ring column, the middle lower ring column and the lower ring column, and an oil inlet cavity 7 is formed between the valve body 1, the upper cover 2 and the valve seat 4. The spring 3 is arranged on the valve body 1 and between the middle upper ring column and the lower cylinder.

[0027] When the retarder oil pressure at the lower end of the valve seat 4 increases, the retarder oil pushes the lower cylinder of the valve body 1 with a greater pressure, the spring 3 is compressed, the lower cylinder leaves the valve seat 4, the oil inlet hole 5 opens, and the retarder oil enters the oil inlet chamber from the oil inlet hole 5, and flows out from the eight oil outlet holes 6 opened on the upper cover 2. This structure has a large oil output and can meet the large flow demand of the retarder oil. On the contrary, when the retarder oil pressure at the upper end of the upper cover 2 is higher than the retarder oil pressure at the lower end of the valve seat 4, the pressure pushes the valve body 1, so that the lower cylinder fits tightly to the outer periphery of the oil inlet hole 5, the oil inlet hole 5 is blocked, and the retarder oil flow channel is blocked. In this way, the retarder oil can only flow from top to bottom, and cannot flow from top to bottom. While achieving a large flow, the one-way control requirements are met.

[0028] The utility model has a simple structure and a low cost, and can meet the demand for large flow, and can be widely applied to trucks equipped with hydraulic retarders.

[0029] The processing of the utility model:

[0030] Upper cover 2: After cutting with round steel, the outer circle is processed into a four-stage stepped cylinder, the upper section has the smallest diameter, the middle upper section has a moderate diameter, the middle lower section has the largest diameter, and the lower section is processed with external threads; the interior is processed into two sections of round holes, the upper section has a small diameter, and the lower section has a large diameter; eight vertically penetrating oil outlet holes 6 are processed on the middle upper step.

[0031] Valve seat 4: After the round steel is cut, the outside is processed into two-stage stepped cylinders, with the upper section having a large diameter and the lower section having a small diameter; the inside is processed into three-stage round holes, with the upper section having an internal thread, the middle section having a moderate diameter, and the lower section having a small diameter, and a back-off groove is processed at the lower end of the internal thread.

[0032] Valve body 1: After the round steel is cut, it is processed into a three-stage stepped cylinder, with the upper section having the smallest diameter, the middle section having a moderate diameter, and the lower section having the largest diameter.

[0033] Spring 3: Made of spring steel wire.

[0034] Assembly: Put the spring on the valve: 1, and then install it in the valve seat 4, and finally pass the upper cover through the upper section of the valve body 1, and twist the internal thread of the upper cover 2 with the internal thread of the valve seat 4.

[0035] The utility model has the advantages of simple structure, easy processing and low cost.

[0036] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A one-way valve for a hydraulic retarder of an automobile, characterized in that: It comprises a valve body, an upper cover and a valve seat; an oil inlet hole is provided at the bottom of the valve seat; the upper cover is connected to the top of the valve seat, an oil inlet cavity is left between the upper cover and the valve seat, and an oil outlet hole is provided on the upper cover; a spring is provided on the valve body, the diameter of the lowest end of the valve body is larger than the oil inlet hole, and the lowest end of the valve body fits the outer periphery of the oil inlet hole; the upper section of the valve body passes through the upper cover and is slidably sleeved with the upper cover; The upper cover is a four-section stepped circular cylinder structure, which is, from top to bottom, an upper ring column, a middle upper ring column, a middle lower ring column and a lower ring column, wherein the outer diameter of the upper ring column is the smallest, and the inner diameters of the upper ring column and the middle upper ring column are the same; the outer diameter of the middle lower ring column is the largest, and the inner diameters of the middle lower ring column and the lower end ring column are the same; the oil outlet holes are opened on the middle upper ring column, uniformly distributed circumferentially along the axis of the middle upper ring column, and vertically penetrate the middle upper ring column.

2. The automobile hydraulic retarder one-way valve according to claim 1, characterized in that: The valve body is a three-section cylindrical structure, which is an upper cylinder, a middle cylinder and a lower cylinder from top to bottom; the upper cylinder has the smallest diameter and the lower cylinder has the largest diameter; wherein, The bottom end surface of the lower cylinder fits the outer circumference of the oil inlet hole, and its diameter is larger than the diameter of the oil inlet hole; the upper cylinder is slidably sleeved with the upper ring column; the outer diameters of the middle cylinder and the lower cylinder are smaller than the inner diameters of the middle-upper ring column, the middle-lower ring column and the lower ring column; the spring is arranged on the valve body and is arranged between the middle-upper ring column and the lower cylinder.

3. The automobile hydraulic retarder one-way valve according to claim 2, characterized in that: The valve seat is a circular cylindrical structure, and the outer side of the valve seat is a two-stage step structure; the inner side of the valve seat is a three-stage step structure with an inner diameter that decreases from top to bottom, namely the upper step, the middle step and the lower step; the lower cylinder fits with the lower step of the valve seat.

4. The automobile hydraulic retarder one-way valve according to claim 3, characterized in that: The lower ring column is provided with external threads; the upper step of the valve seat is provided with internal threads, and the lower ring column and the upper step are threadedly connected.

5. The automobile hydraulic retarder one-way valve according to claim 4, characterized in that: The lower end of the internal thread of the valve seat is processed with a back-cut groove.

6. The automobile hydraulic retarder one-way valve according to claim 1, characterized in that: The oil outlet holes are eight.

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