Efficient gearbox control valve group

Abstract

The invention discloses an efficient gearbox control valve set, belongs to the field of gearboxes, and solves the problem that in the prior art, under the condition that a gearbox is rapidly connected or separated, the pause feeling is serious. According to the invention, a plurality of groups of oil way channels are constructed in the valve plate of the valve group, and all the oil way channels are correspondingly communicated with all gear pistons of the gearbox respectively; a buffer oil cavity is formed in the other end of the oil way channel, and a buffer valve piece for filling liquid after the pressure of the oil cavity at the upper end is relieved is arranged in the buffer oil cavity; distribution oil way channels are formed in the valve bank valve plate and communicate with all the oil way channels through communicating ports correspondingly. The oil inlet end of the distribution oil way channel is provided with a priority valve which opens or closes the distribution oil way channel after moving. The efficient gearbox control valve set is provided with the buffer valves of all the gears, so that connection and separation of a clutch are delayed, pause caused by rapid connection and separation is reduced, and the service life is effectively prolonged.

Description

Technical Field

[0001] The invention relates to a high-efficiency gearbox control valve group and belongs to the field of gearboxes. Background Art

[0002] China started research on AT transmissions relatively late, especially heavy-duty AT transmissions. Because of their special uses, such as in engineering vehicles, fuel mining trucks, military vehicles and other working environments, they have strict requirements on the stability and reliability of the transmissions, and demanding requirements on the manufacturing level. Foreign technology monopoly and export restrictions are becoming increasingly severe, so China needs its own heavy-duty AT transmissions. The transmission control valve group, as a control component that controls the engagement or separation of each clutch group of the AT transmission, needs to perform a series of transmission shifting operations and is an important component of the AT transmission.

[0003] The problem of AT gearbox gear shifting jerking is a common problem that occurs when vehicles using AT gearboxes shift gears. There are many reasons for AT gearbox gear shifting jerking. One of the reasons is that the various clutches of the AT gearbox move too quickly when engaging or disengaging. When engaging or disengaging quickly, the friction transmission between the clutch plates is transmitted quickly in an instant, causing impact on the gear set and friction plates, making the jerking feeling more serious and affecting the service life. Summary of the invention

[0004] The present invention provides a high-efficiency transmission control valve group with buffer valves for each gear position, which delays the engagement and separation of the clutch, thereby reducing the setback caused by rapid engagement and separation and effectively prolonging the service life.

[0005] The technical solution adopted by the present invention is a high-efficiency gearbox control valve group, including a valve group valve plate fixed on the gearbox, wherein a plurality of groups of oil passages are constructed in the valve group valve plate, and all the oil passages are respectively connected to the respective gear pistons of the gearbox;

[0006] One end of the oil passage has an upper oil chamber, and the upper oil chamber has a shift valve member for opening or closing the upper oil chamber after movement;

[0007] The other end of the oil passage is provided with a buffer oil chamber, and the buffer oil chamber is provided with a buffer valve member for filling with liquid after the pressure of the upper end oil chamber is relieved;

[0008] The valve plate of the valve group is provided with a distribution oil passage, and the distribution oil passage has a plurality of communication ports corresponding to the oil passages, and the distribution oil passage is connected with each oil passage through the communication ports;

[0009] The oil inlet end of the distribution oil passage is provided with a priority valve for opening or closing the distribution oil passage after movement.

[0010] Optimized, the above-mentioned high-efficiency transmission control valve group, the oil circuit channels are respectively the reverse gear shift oil circuit, the low-speed gear shift oil circuit, the medium-speed gear shift oil circuit, and the high-speed gear shift oil circuit.

[0011] Optimally, the above-mentioned high-efficiency transmission control valve group also includes an electromagnetic pressure regulating valve, the pressure regulating end of the electromagnetic pressure regulating valve is connected to each group of oil circuit channels and adjusts the internal oil pressure of each group of oil circuits.

[0012] Optimized, the above-mentioned high-efficiency transmission control valve group, the shift valve component includes a valve core spring and a shift valve core;

[0013] The shift valve core is installed in the upper oil chamber and slides in the upper oil chamber; one end of the spring is fixed in the upper oil chamber, and the other end of the spring is in tight contact with the shift valve core and pushes the shift valve core to move after the upper oil chamber is depressurized.

[0014] Optimized, the above-mentioned high-efficiency transmission control valve group, the buffer valve component includes a buffer valve spring 2 and a buffer valve core;

[0015] One end of the buffer valve spring 2 is fixed in the buffer oil chamber, and the other end of the buffer valve spring 2 is in tight contact with the buffer valve core; the buffer valve core is installed in the buffer oil chamber and is pushed and moved by oil after the upper end oil chamber is depressurized.

[0016] Optimally, in the above-mentioned high-efficiency transmission control valve group, the oil circuit channel is connected with a pressure measuring oil circuit, and the pressure measuring oil circuit has a pressure measuring hole.

[0017] Optimized, the above-mentioned high-efficiency transmission control valve group further includes an auxiliary transmission high-speed gear shift oil circuit connected to the auxiliary transmission high-speed gear clutch piston, and an auxiliary transmission low-speed gear shift oil circuit connected to the auxiliary transmission low-speed gear clutch piston;

[0018] The auxiliary transmission high-speed gear shift oil circuit and the auxiliary transmission low-speed gear shift oil circuit are connected to an auxiliary transmission gear shift valve;

[0019] The oil inlet ends of the auxiliary transmission high-speed gear shift oil circuit and the auxiliary transmission low-speed gear shift oil circuit are connected to the main pressure oil circuit through the auxiliary transmission gear shift valve respectively.

[0020] The advantages of this application are:

[0021] If the initial pressure of the clutch engagement is too high, the clutch will engage too quickly, causing setbacks and wear. In the technical solution of the present application, when the oil enters the gear piston, it also enters the corresponding buffer valve of the gear. Under the action of pressure, the buffer valve will be filled with liquid, and the pressure in the piston will not be too high, thereby adjusting the initial pressure. When the gear piston releases pressure, the buffer valve will use "filling" to maintain pressure, and the pressure will not drop too quickly, thereby reducing the setback problem during the gearbox shifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the internal structure of the valve plate of this application. DETAILED DESCRIPTION

[0023] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] As shown in the figure, the present invention is a high-efficiency transmission control valve group, which is used to control the shifting operation of an AT transmission. The internal structure of the valve plate of the high-efficiency transmission control valve group of the present application is as follows: Figure 1 As shown, the oil circuit connection structure of the high-efficiency transmission control valve group of the present application is the same as the oil circuit connection structure of the AT transmission control valve group of the prior art.

[0025] The present invention discloses a high-efficiency gearbox control valve group, comprising a valve group valve plate 1 fixed to the gearbox, wherein the valve group valve plate 1 is provided with a plurality of oil passages, and all the oil passages are connected to the respective gear pistons of the gearbox. Figure 1 As shown, the oil passages in the present application are respectively a reverse gear shift oil passage 1001, a low speed gear shift oil passage 1002, a medium speed gear shift oil passage 1003, and a high speed gear shift oil passage 1004. The reverse gear shift oil passage 1001, the low speed gear shift oil passage 1002, the medium speed gear shift oil passage 1003, and the high speed gear shift oil passage 1004 are all independent oil passages.

[0026] In addition, a sub-transmission high-speed gear shift oil path 7 communicating with the sub-transmission high-speed gear clutch piston and a sub-transmission low-speed gear shift oil path 8 communicating with the sub-transmission low-speed gear clutch piston are constructed in the valve group valve plate 1 .

[0027] Among them, the reverse gear shift oil circuit 1001, the low speed gear shift oil circuit 1002, the medium speed gear shift oil circuit 1003, and the high speed gear shift oil circuit 1004 correspond to control the reverse gear clutch, the low speed gear clutch, the medium speed gear clutch, and the high speed gear clutch respectively. The auxiliary transmission high speed gear shift oil circuit 7 and the auxiliary transmission low speed gear shift oil circuit 8 correspond to control the auxiliary transmission high speed gear and the auxiliary transmission low speed gear.

[0028] This setting can correspond to the 6 forward gears and two reverse gears of the AT gearbox. The specific corresponding relationship is:

[0029] Neutral; auxiliary transmission low gear engaged;

[0030] 1st gear: Auxiliary transmission low gear + low gear clutch are engaged at the same time;

[0031] 2nd gear: sub-transmission high gear + low gear clutch are engaged at the same time;

[0032] 3rd gear: the auxiliary transmission low gear + medium gear clutch are engaged at the same time;

[0033] 4th gear: sub-transmission high gear + medium gear clutch are engaged at the same time;

[0034] 5th gear: the auxiliary transmission low gear + high gear clutch are engaged at the same time;

[0035] 6th gear: sub-transmission high gear + high gear clutch are engaged at the same time;

[0036] Reverse 1st gear: Auxiliary transmission low gear + reverse clutch are engaged at the same time;

[0037] Reverse 2nd gear: Sub-transmission high gear + reverse clutch are engaged at the same time.

[0038] The oil passage is connected to a main pressure oil circuit 11 , and a solenoid valve is provided in the middle section of the main pressure oil circuit 11 .

[0039] One end of the oil passage has an upper oil chamber, and the upper oil chamber has a shift valve member that opens or closes the upper oil chamber after movement. The upper oil chambers of the reverse gear shift oil circuit 1001, the low-speed gear shift oil circuit 1002, the medium-speed gear shift oil circuit 1003, and the high-speed gear shift oil circuit 1004 respectively have a reverse gear shift valve, a low-speed gear shift valve, a medium-speed gear shift valve, and a high-speed gear shift valve. In the oil circuit, the sub-transmission high-speed gear shift oil circuit 7 and the sub-transmission low-speed gear shift oil circuit 8 have a common upper oil chamber, and a sub-transmission shift valve 9 is provided in the common upper oil chamber of the sub-transmission high-speed gear shift oil circuit 7 and the sub-transmission low-speed gear shift oil circuit 8.

[0040] The other end of the oil passage has a buffer oil chamber, and the buffer oil chamber has a buffer valve member that is filled with liquid after the upper end oil chamber is depressurized. The buffer oil chambers of the reverse gear shift oil circuit 1001, the low speed gear shift oil circuit 1002, the medium speed gear shift oil circuit 1003, and the high speed gear shift oil circuit 1004 respectively have a reverse gear buffer valve, a low speed gear buffer valve, a medium speed gear buffer valve, and a high speed gear buffer valve. The auxiliary transmission high speed gear shift oil circuit 7 and the auxiliary transmission low speed gear shift oil circuit 8 have an auxiliary transmission high speed gear buffer valve and an auxiliary transmission low speed gear buffer valve.

[0041] The valve plate 1 of the valve group has a distribution oil passage 11, and the distribution oil passage 11 has a plurality of communication ports corresponding to the oil passages, and the distribution oil passage 11 is connected with each oil passage through the communication ports. The oil inlet end of the distribution oil passage 11 has a priority valve 2 for opening or closing the distribution oil passage 11 after movement. In this embodiment, the distribution oil passage 11 serves as the main oil supply oil passage of the high-efficiency gearbox control valve group of the present application, and the priority valve 2 is used to open and close the distribution oil passage 11. The reverse gear shift valve, the low-speed gear shift valve, the medium-speed gear shift valve, and the high-speed gear shift valve are used to control the on and off of the shift oil supply of the reverse gear shift oil passage 1001, the low-speed gear shift oil passage 1002, the medium-speed gear shift oil passage 1003, and the high-speed gear shift oil passage 1004, respectively.

[0042] In this embodiment, an electromagnetic pressure regulating valve 3 is used, and the pressure regulating end of the electromagnetic pressure regulating valve 3 is connected to each group of oil circuit channels and adjusts the internal oil pressure of each group of oil circuits.

[0043] As shown in the figure, the shift valve member includes a valve core spring 401 and a shift valve core 402. The shift valve core 402 is installed in the upper oil chamber and slides in the upper oil chamber. One end of the spring 401 is fixed in the upper oil chamber, and the other end of the spring 401 is in tight contact with the shift valve core 402 and pushes the shift valve core 402 to move after the upper oil chamber is depressurized.

[0044] The transmission pressure oil is distributed to the oil chambers at the upper ends of the valve cores of the reverse gear shift valve, the low-speed gear shift valve, the medium-speed gear shift valve, and the high-speed gear shift valve through the priority valve 2. Under the action of the oil pressure, the shift valve core 402 is pressed down to reach the waiting position for shifting.

[0045] The buffer valve member includes a buffer valve spring 2 501 and a buffer valve core 502. One end of the buffer valve spring 2 501 is fixed in the buffer oil chamber, and the other end of the buffer valve spring 2 501 is in tight contact with the buffer valve core 502. The buffer valve core 502 is installed in the buffer oil chamber and is pushed and moved by the oil after the upper end oil chamber is depressurized.

[0046] Here is an example of the 2nd gear shift control process. In the 2nd gear, the high gear and low gear clutches of the auxiliary transmission are engaged at the same time, and the low gear solenoid valve of the auxiliary transmission does not move and is not energized, that is, the high gear clutch of the auxiliary transmission remains engaged, and the low gear clutch solenoid valve is energized, the oil chamber at the upper end of the low gear shift valve is depressurized, and the spring 401 pushes the shift valve core 402 upward, and the oil enters the low gear piston seat, pushing the piston to hold the clutch plate tightly, thereby achieving gear shifting.

[0047] In addition, when the oil enters the low-speed piston, it also enters the low-speed buffer valve. Under the action of pressure, the low-speed buffer valve will be filled with liquid, and the pressure in the piston will not be too high to adjust the initial pressure. When the pressure is high, the buffer valve will release pressure. Excessive pressure will cause the clutch to engage too quickly, causing setbacks and wear. When the piston releases pressure, the buffer valve will use "filling" to maintain pressure, and will not let the pressure drop too quickly to adjust the oil discharge of the previous clutch, preventing the two clutches from slipping and overlapping engagement for too long during the shifting process.

[0048] The oil passage is connected with a pressure measuring oil passage 6, and the pressure measuring oil passage 6 has a pressure measuring hole. The pressure of each oil passage is measured through the pressure measuring hole, and the pressure measurement can adopt an oil pressure sensor.

[0049] The high-efficiency transmission control valve group of this embodiment has a better driving experience, smooth gear shifting, no power interruption during gear shifting, and can adapt to more severe working conditions.

[0050] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A high-efficiency gearbox control valve group, comprising a valve group valve plate (1) fixed on the gearbox, wherein a plurality of groups of oil passages are constructed in the valve group valve plate (1), and all the oil passages are respectively connected to corresponding gear pistons of the gearbox; characterized in that: One end of the oil passage has an upper oil chamber, and the upper oil chamber has a shift valve member for opening or closing the upper oil chamber after movement; The other end of the oil passage is provided with a buffer oil chamber, and the buffer oil chamber is provided with a buffer valve member for filling with liquid after the pressure of the upper end oil chamber is relieved; The valve plate (1) of the valve group has a distribution oil passage (11) therein, the distribution oil passage (11) has a plurality of communication ports arranged corresponding to the oil passages, and the distribution oil passage (11) is connected to each oil passage through the communication ports; The oil inlet end of the distribution oil passage (11) is provided with a priority valve (2) for opening or closing the distribution oil passage (11) after movement.

2. The high-efficiency transmission control valve group according to claim 1 is characterized in that: The oil passages are respectively a reverse gear shift oil passage (1001), a low speed gear shift oil passage (1002), a medium speed gear shift oil passage (1003), and a high speed gear shift oil passage (1004).

3. The high-efficiency transmission control valve assembly according to claim 1, characterized in that: The shift valve component comprises a valve core spring (401) and a shift valve core (402); The shift valve core (402) is installed in the upper oil chamber and slides in the upper oil chamber; one end of the spring (401) is fixed in the upper oil chamber, and the other end of the spring (401) is in tight contact with the shift valve core (402) and pushes the shift valve core (402) to move after the upper oil chamber is depressurized.

4. The high-efficiency transmission control valve group according to claim 1 is characterized in that: The buffer valve component comprises a buffer valve spring 2 (501) and a buffer valve core (502); One end of the second buffer valve spring (501) is fixed in the buffer oil chamber, and the other end of the second buffer valve spring (501) is in tight contact with the buffer valve core (502); the buffer valve core (502) is installed in the buffer oil chamber and is pushed and moved by oil after the upper end oil chamber is depressurized.

5. The high-efficiency transmission control valve assembly according to claim 1, characterized in that: The oil channel is connected to a pressure measuring oil circuit (6), and the pressure measuring oil circuit (6) has a pressure measuring hole.

6. The high-efficiency transmission control valve assembly according to claim 1, characterized in that: It also includes an auxiliary transmission high-speed gear shift oil circuit (7) connected to the auxiliary transmission high-speed gear clutch piston, and an auxiliary transmission low-speed gear shift oil circuit (8) connected to the auxiliary transmission low-speed gear clutch piston; The auxiliary transmission high-speed gear shift oil circuit (7) and the auxiliary transmission low-speed gear shift oil circuit (8) are connected to an auxiliary transmission gear shift valve (9); The oil inlet ends of the auxiliary transmission high-speed gear shift oil circuit (7) and the auxiliary transmission low-speed gear shift oil circuit (8) are respectively connected to the main pressure oil circuit (11) through the auxiliary transmission gear shift valve (9).

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