Clutch control valve with damping function

Abstract

The utility model relates to a kind of clutch control valve with buffering function, include valve body, overflow valve, buffer valve and reversing valve being arranged in valve body;The valve body is equipped with oil inlet P, lubricating oil port O, oil outlet A, oil return port T and oil drain port T1;The buffer valve includes buffer valve core, buffer valve sleeve and the buffer spring connected with both;The oil inlet end of the buffer valve is communicated with oil inlet P, and the oil outlet end is communicated with the oil inlet end of reversing valve;The oil outlet end of the buffer valve is communicated with the right side of buffer valve sleeve by the internal flow passage of valve body, and is communicated with oil return port T by the hole channel on buffer valve core.The utility model is simple in structure, low in cost, high in reliability, low in maintenance cost, and good in buffering effect when impacting clutch combination.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, specifically to a clutch control valve with a buffer function. Background Technology

[0002] In a vehicle's transmission system, the clutch control valve controls the engagement and disengagement of the clutch by setting oil pressure and issuing commands. Currently, the clutch control valve's response is too direct, lacking smooth control of the moving parts. The oil pressure changes too rapidly, resulting in significant impact, strong jerking, and poor shifting quality when the clutch engages, which greatly reduces the clutch's lifespan.

[0003] Existing solutions generally include fixed orifices, accumulators, and electronically controlled proportional valves. Fixed orifices and accumulators offer limited buffering capabilities and cannot adapt to different operating conditions. On the other hand, solutions using electronically controlled proportional valves require the use of controllers and various monitoring sensors, resulting in a large number of electronic control components, system complexity, high failure rate, and high manufacturing and maintenance costs.

[0004] Therefore, there is an urgent need for a clutch control valve that is simple in structure, low in cost, highly reliable, low in maintenance cost, and has a good buffering effect. Summary of the Invention

[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a clutch control valve with simple structure, low cost, high reliability, low maintenance cost and good buffering effect.

[0006] The purpose of this utility model is achieved as follows: A clutch control valve with a buffer function includes a valve body, an overflow valve, a buffer valve, and a directional valve disposed within the valve body; the valve body is provided with an oil inlet P, a lubricating oil port O, an oil outlet A, an oil return port T, and an oil drain port T1; The overflow valve includes an overflow valve core and an overflow spring; the oil inlet end of the overflow valve is connected to the oil inlet port P, and the oil outlet end is connected to the lubricating oil port O. The buffer valve includes a buffer valve core, a buffer valve sleeve, and a buffer spring connecting the two; the oil inlet end of the buffer valve is connected to the oil inlet port P, and the oil outlet end is connected to the oil inlet end of the reversing valve; the oil outlet end of the buffer valve is connected to the right side of the buffer valve sleeve through the internal flow channel of the valve body, and is connected to the oil return port T through the channel on the buffer valve core. The reversing valve has two reversing positions: left and right. When the reversing valve core is in the left position, its oil inlet is connected to the oil return port T and its oil outlet is connected to the oil drain port T1. When the reversing valve core is in the right position, its oil inlet is connected to the oil outlet.

[0007] Furthermore, a throttling plug A is provided between the oil inlet end of the buffer valve and the oil inlet P.

[0008] Furthermore, a throttling plug B is provided in the oil outlet end of the buffer valve leading to the buffer valve core passage and the valve body flow passage on the right side of the buffer valve sleeve.

[0009] Furthermore, the overflow spring cavity of the overflow valve is connected to the control port C provided on the valve body.

[0010] Furthermore, the reversing valve is a manual reversing valve, with a gear positioning section on the valve core, which cooperates with the positioning device on the valve body to realize the gear positioning function, including two gears: left and right.

[0011] Furthermore, the gear positioning section of the reversing valve core consists of two arc-shaped grooves; the positioning device includes a positioning steel ball and a positioning spring disposed on the valve body; the positioning steel ball is stuck in the arc-shaped groove under the thrust of the positioning spring, thereby realizing the gear positioning function of the reversing valve.

[0012] Furthermore, the oil outlet A is connected to a clutch.

[0013] Furthermore, the valve body is provided with an oil outlet PA connected in parallel with the oil outlet A.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This invention incorporates an overflow valve, a buffer valve, and a directional valve within the control valve. A channel is provided on the buffer valve core, allowing a large amount of oil to flow into the return port during the initial pressure rise, thus slowing the pressure increase and forming a primary oil pressure buffer. A secondary oil pressure buffer is formed by gradually establishing a dynamic balance between the buffer valve core, buffer spring, and buffer valve sleeve. These two oil pressure buffers achieve an ideal buffering effect on the system oil pressure during clutch engagement, thereby meeting the buffering requirements during clutch engagement. The valve body has a simple overall structure, high reliability, low cost, and good buffering effect. Attached Figure Description

[0015] Figure 1 This is a hydraulic schematic diagram of a clutch control valve with a buffer function according to this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the valve body of a clutch control valve with buffering function according to this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the valve body of a clutch control valve with buffering function according to this utility model.

[0018] Figure 4 This is an isometric view of the top of the valve body of a clutch control valve with a buffer function according to this utility model.

[0019] Figure 5This is an isometric view of the bottom of the valve body of a clutch control valve with a buffer function according to this utility model.

[0020] in: Valve body 1, relief valve 2, buffer valve 3, directional valve 4; Overflow valve core 21, overflow spring 22, buffer valve core 31, buffer spring 32, buffer valve sleeve 33, orifice 34, reversing valve core 41, positioning steel ball 42, positioning spring 43, arc-shaped groove 44, throttle plug A51, throttle plug B52. Detailed Implementation

[0021] See Figures 1-5 This utility model relates to a clutch control valve with a buffer function, comprising a valve body 1, an overflow valve 2, a buffer valve 3 and a reversing valve 4 disposed within the valve body 1; the valve body 1 is provided with an oil inlet P, a lubricating oil port O, an oil outlet A, a return oil port T and a drain port T1; the oil outlet A is connected to the clutch, and the valve body 1 is provided with an oil outlet PA connected in parallel with the oil outlet A as a backup port for the oil outlet A; The overflow valve 2 includes an overflow valve core 21 and an overflow spring 22; the oil inlet end of the overflow valve 2 is connected to the oil inlet port P, and the oil outlet end is connected to the lubricating oil port O; the cavity of the overflow spring 22 is connected to the control port C provided on the valve body 1. By injecting hydraulic oil of different pressures into the control port C, the rebound force of the overflow spring 22 on the overflow valve core 21 can be adjusted, thereby adjusting the system oil pressure, so that it can be applied to different clutch operating conditions; The buffer valve 3 includes a buffer valve core 31, a buffer valve sleeve 33, and a buffer spring 32 connecting the two. The oil inlet end of the buffer valve 3 is connected to the oil inlet port P, and the oil outlet end is connected to the oil inlet end of the reversing valve 4. A throttling plug A51 is provided in the flow channel of the valve body 1 between the oil inlet end of the buffer valve 3 and the oil inlet port P. The oil outlet end of the buffer valve 3 is connected to the right side of the buffer valve sleeve 33 through the internal flow channel of the valve body 1, and is connected to the return port T through the orifice 34 on the buffer valve core 31. A throttling plug B52 is provided in the flow channel of the valve body 1 between the oil outlet end of the buffer valve 3 and the orifice 34 of the buffer valve core 31 and the right side of the buffer valve sleeve 33. The reversing valve 4 is a manual reversing valve, which includes two reversing positions: left and right. When the reversing valve core 41 is in the left position, its oil inlet end is connected to the oil return port T and its oil outlet end is connected to the oil drain port T1. The hydraulic oil from the buffer valve 3 flows into the oil return port T and the oil from the oil outlet A flows into the oil drain port T1. When the valve core of the reversing valve 4 is in the right position, its oil inlet end is connected to the oil outlet end. The hydraulic oil from the buffer valve 3 flows to the oil outlet A, and the oil return port T and the oil drain port T1 are not connected to the oil. A gear positioning section is provided on the reversing valve core 41, which cooperates with the positioning device provided on the valve body 1 to realize the gear positioning function, including two gears: left and right. Specifically, the gear positioning section is two arc-shaped grooves 44 on the reversing valve core 41. The positioning device includes a positioning steel ball 42 and a positioning spring 43 provided on the valve body 1. The positioning steel ball 42 is stuck in the arc-shaped groove 44 under the thrust of the positioning spring 43, realizing the gear positioning function of the reversing valve 4. Working principle: Hydraulic oil enters valve body 1 through oil inlet P. The hydraulic oil enters the leftmost side of overflow valve core 21 through the small hole at the left end of overflow valve core 21, pushing overflow valve core 21 to move to the right and compress overflow spring 22. When the hydraulic oil reaches the set pressure, it flows through overflow valve core 21 to lubrication port O. At the same time, the hydraulic oil flows to buffer valve 3 through throttling plug 51. Hydraulic oil flows through the buffer valve core 31 and the oil passage of the valve body 1 to the manual directional valve 4. When the directional valve core 41 is in the left position, the hydraulic oil entering the buffer valve core 31 has no pressure. A small amount of hydraulic oil returns to the return port T through the throttle plug 52, and a large amount of hydraulic oil returns to the return port T through the manual directional valve 4.

[0022] When the directional valve core 41 is in the right position, a large amount of hydraulic oil flows into the outlet port A through the manual directional valve 4, and a small amount of hydraulic oil flows into the return port T through the throttle plug 52. The outlet port A is connected to the clutch. When the hydraulic oil fills the cavity connected to the outlet port A, the pressure begins to rise. The hydraulic oil enters the left end of the buffer valve core 31 from the oil passage of the valve body 1. As the pressure rises, more and more hydraulic oil flows into the return port T through the throttle plug 52 and the orifice 34 of the buffer valve core 31. At this time, the rate of pressure rise is slowed down, forming a hydraulic pressure buffer. After the hydraulic oil rises to a certain value, the buffer valve core 31... 1. Overcoming the resistance of the buffer spring 32, the buffer sleeve 33 moves to the right, simultaneously blocking the flow of the throttle plug 52 to the return port T through the orifice 34 on the buffer valve core 31. At this time, the hydraulic oil flows to the right side of the buffer valve sleeve 33 after passing through the throttle plug 52, causing the buffer valve sleeve 33 to overcome the resistance of the buffer spring 32 and move to the left. Now, the buffer valve core 31 and the buffer valve sleeve 33 compress the buffer spring 32, and the three gradually enter a dynamic equilibrium state. This process is called secondary hydraulic buffering. When the buffer valve 3 is in a dynamic equilibrium state, the buffering ends, and the hydraulic oil quickly rises to the set value, pushing the clutch to complete the engagement. The two-stage hydraulic buffering can effectively solve the problem of large clutch engagement shock. At the same time, compared with electronic proportional valve control, it has a simple structure, comfortable operation, high reliability, and relatively low cost.

[0023] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A clutch control valve with a buffer function, characterized in that: It includes a valve body (1), an overflow valve (2), a buffer valve (3) and a reversing valve (4) disposed within the valve body (1); the valve body (1) is provided with an oil inlet P, a lubricating oil port O, an oil outlet A, an oil return port T and an oil drain port T1; The overflow valve (2) includes an overflow valve core (21) and an overflow spring (22); the oil inlet end of the overflow valve (2) is connected to the oil inlet port P, and the oil outlet end is connected to the lubricating oil port O; The buffer valve (3) includes a buffer valve core (31), a buffer valve sleeve (33), and a buffer spring (32) connecting the two. The oil inlet of the buffer valve (3) is connected to the oil inlet P, and the oil outlet is connected to the oil inlet of the reversing valve (4). The oil outlet of the buffer valve (3) is connected to the right side of the buffer valve sleeve (33) through the internal flow channel of the valve body (1), and is connected to the oil return port T through the hole (34) on the buffer valve core (31). The reversing valve (4) includes two reversing positions: left and right. When the reversing valve core (41) is in the left position, its oil inlet end is connected to the oil return port T and its oil outlet end is connected to the oil drain port T1. When the valve core of the reversing valve (4) is in the right position, its oil inlet end is connected to the oil outlet end.

2. The clutch control valve with buffer function according to claim 1, characterized in that: A throttling plug A (51) is provided between the oil inlet end of the buffer valve (3) and the oil inlet P.

3. The clutch control valve with buffer function according to claim 1, characterized in that: The oil outlet of the buffer valve (3) is connected to the channel (34) of the buffer valve core (31) and the flow channel of the valve body (1) on the right side of the buffer valve sleeve (33) is provided with a throttling plug B (52).

4. The clutch control valve with buffer function according to claim 1, characterized in that: The overflow spring (22) cavity of the overflow valve (2) is connected to the control port C provided on the valve body (1).

5. The clutch control valve with buffer function according to claim 1, characterized in that: The reversing valve (4) is a manual reversing valve. A gear positioning section is provided on the reversing valve core (41), which cooperates with the positioning device set on the valve body (1) to realize the gear positioning function, including two gears: left position and right position.

6. The clutch control valve with buffer function according to claim 5, characterized in that: The gear positioning section of the reversing valve core (41) consists of two arc-shaped grooves (44); the positioning device includes a positioning steel ball (42) and a positioning spring (43) set on the valve body (1); the positioning steel ball (42) is stuck in the arc-shaped groove (44) under the thrust of the positioning spring (43) to realize the gear positioning function of the reversing valve (4).

7. The clutch control valve with buffer function according to claim 1, characterized in that: The oil outlet A is connected to the clutch.

8. The clutch control valve with buffer function according to claim 1, characterized in that: The valve body (1) is provided with an oil outlet PA connected in parallel with the oil outlet A.

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