Anti-slip valve

Abstract

The utility model discloses an anti-slip valve which comprises a valve body, a switching valve and a flow distributing and collecting valve. Wherein an oil inlet, a first oil outlet, a second oil outlet, a first mounting hole and a second mounting hole are formed in the valve body, the oil inlet is communicated with the first mounting hole and the second mounting hole, the first mounting hole and the second mounting hole are communicated with the first oil outlet, and the second oil outlet is communicated with the second mounting hole. The first mounting hole and the second mounting hole are respectively communicated with the first oil outlet and the second oil outlet, the switching valve is mounted in the first mounting hole, and the switching valve is used for switching to an open state so that the oil inlet is respectively and freely communicated with the first oil outlet and the second oil outlet through the switching valve. According to the utility model, oil supplied by the pump can be uniformly distributed into the two hydraulic motors when a slipping phenomenon occurs, so that the two hydraulic motors can rotate to provide power for the vehicle, and the situation that one of the walking wheels is suspended and cannot walk due to slipping is prevented.

Description

Technical Field

[0001] The utility model relates to an anti-slip valve. Background Art

[0002] At present, in some agricultural vehicles or engineering vehicles, a pump is usually used to supply oil to two hydraulic motors. The two hydraulic motors are respectively connected to the walking wheels on both sides and drive the walking wheels on both sides to rotate, thereby driving the agricultural vehicle or engineering vehicle to move forward. However, when one of the walking wheels falls into a pothole and becomes suspended, or one of the walking wheels becomes suspended due to uneven road conditions, the resistance on the suspended walking wheel decreases sharply, resulting in a decrease in the resistance on the hydraulic motor connected to the suspended walking wheel. At this time, the suspended walking wheel and the corresponding hydraulic motor will slip, and all the oil supplied by the pump will flow into the hydraulic motor connected to the suspended walking wheel, causing the suspended walking wheel to rotate idly continuously, while the non-suspended walking wheel loses power, and further causing the agricultural vehicle or engineering vehicle to be unable to move forward normally. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an anti-slip valve, which can evenly distribute the oil supplied by the pump to the two hydraulic motors when a slipping phenomenon occurs, ensure that both hydraulic motors can rotate to provide power for the vehicle, and prevent slipping and inability to move due to suspension of one of the walking wheels.

[0004] To solve the above technical problem, the technical solution of the utility model is: an anti-slip valve, comprising a valve body, a switching valve and a flow dividing and collecting valve;

[0005] An oil inlet, a first oil outlet, a second oil outlet, a first mounting hole and a second mounting hole are provided in the valve body;

[0006] The oil inlet is respectively communicated with the first mounting hole and the second mounting hole;

[0007] The first mounting hole and the second mounting hole are respectively communicated with the first oil outlet;

[0008] The first mounting hole and the second mounting hole are also respectively communicated with the second oil outlet;

[0009] The switching valve is installed in the first mounting hole. The switching valve is used to switch to an open state to enable the oil inlet to be freely communicated with the first oil outlet and the second oil outlet respectively through the switching valve, and the switching valve is also used to switch to a closed state to disconnect the free communication between the oil inlet and the first oil outlet and the second oil outlet respectively;

[0010] The flow dividing and collecting valve is installed in the second installation hole and is used to proportionally distribute the hydraulic oil accessed from the oil inlet to the first oil outlet and the second oil outlet.

[0011] Furthermore, the anti-slip valve further includes a control valve;

[0012] The valve body is further provided with an oil drain port, an oil drain oil path, and a control chamber;

[0013] The control chamber is communicated with the first installation hole and is hydraulically connected to the switching valve installed in the first installation hole;

[0014] The oil drain port is connected to the oil drain oil path, and the oil drain oil path is communicated with the control chamber;

[0015] The control valve is installed in the oil drain oil path and is used to control the on-off of the oil drain oil path, and further control the switching state of the switching valve by controlling the oil pressure in the control chamber.

[0016] Furthermore, the oil drain oil path includes a first channel, a second channel, and a third channel;

[0017] The oil drain port is communicated with the first channel;

[0018] The first channel is communicated with the second channel;

[0019] The second channel is communicated with the third channel;

[0020] The third channel is communicated with the control chamber;

[0021] The control valve is installed in the first channel and is used to control the on-off of the first channel.

[0022] Furthermore, the switching valve includes a valve sleeve, a valve core, and a spring;

[0023] The valve sleeve is inserted into the first installation hole;

[0024] Between the valve sleeve and the inner wall of the first installation hole, there are a first annular cavity, a second annular cavity, and a third annular cavity arranged in sequence from left to right. The first annular cavity is communicated with the first oil outlet, the second annular cavity is communicated with the oil inlet, and the third annular cavity is communicated with the second oil outlet;

[0025] The valve sleeve is provided with a first flow port, a second flow port, a third flow port, and a fourth flow port arranged in sequence from left to right. The first flow port communicates with the first annular cavity, the second flow port and the third flow port respectively communicate with the second annular cavity, the fourth flow port communicates with the third annular cavity. A first valve wall portion is provided between the first flow port and the second flow port, and a second valve wall portion is provided between the second flow port and the third flow port;

[0026] The valve core is slidably arranged in the valve sleeve. An open cavity is provided on the right side of the valve core in the valve sleeve, and a closed cavity is provided on the left side of the valve core;

[0027] The valve core is provided with an inner hole and a first damping hole. The left end of the inner hole communicates with the closed cavity, and the right end of the inner hole communicates with the open cavity through the first damping hole. The open cavity communicates with the control cavity;

[0028] On the outer peripheral portion of the valve core, a first blocking portion, a second blocking portion, and a third blocking portion are arranged in sequence from left to right. The first blocking portion, the second blocking portion, and the third blocking portion respectively cooperate with the inner wall of the valve sleeve;

[0029] Between the outer peripheral portion of the valve core and the inner wall of the valve sleeve, a first diversion cavity is provided between the first blocking portion and the second blocking portion, and a second diversion cavity is provided between the second blocking portion and the third blocking portion;

[0030] An annular channel is provided on the outer peripheral portion of the second blocking portion. A communication hole is provided in the second blocking portion. One end of the communication hole communicates with the annular channel, and the other end of the communication hole communicates with the inner hole;

[0031] During the process of the valve core sliding in the valve sleeve, it has an open position where it slides to the right in place and a closed position where it slides to the left in place;

[0032] When the valve core slides to the right to the open position, the right end portion of the second blocking portion cooperates with the second valve wall portion, and the first diversion cavity respectively communicates with the first flow port and the second flow port, and the second diversion cavity respectively communicates with the third flow port and the fourth flow port, and the second flow port remains in communication with the annular channel;

[0033] When the valve core slides to the left to the closed position, the left end portion of the second blocking portion cooperates with the first valve wall portion to block and separate the first diversion cavity from the second flow port, and the third blocking portion moves to the left to block the fourth flow port, and the second flow port remains in communication with the annular channel;

[0034] The spring is installed in the valve sleeve and connected to the valve core. When the control valve is opened, the pressure in the open cavity is less than the pressure in the closed cavity, thereby driving the valve core to move to the right to the open position. When the control valve is closed, the pressure in the open cavity is the same as the pressure in the closed cavity, and then the valve core is driven by the spring to slide to the left to the closed position.

[0035] Furthermore, on the outer peripheral wall of the valve sleeve, a first sealing portion, a second sealing portion, a third sealing portion, and a fourth sealing portion are sequentially arranged from left to right;

[0036] The first sealing portion, the second sealing portion, the third sealing portion, and the fourth sealing portion are all in sealing cooperation with the inner wall of the first mounting hole;

[0037] The first annular cavity is located between the first sealing portion and the second sealing portion, the second annular cavity is located between the second sealing portion and the third sealing portion, and the third annular cavity is located between the third sealing portion and the fourth sealing portion.

[0038] Furthermore, a fourth channel, a fifth channel, a sixth channel, and a seventh channel are provided in the valve body;

[0039] The second mounting hole communicates with the first oil outlet through the fourth channel and the fifth channel; wherein, the second mounting hole communicates with the fourth channel, the fourth channel communicates with the fifth channel, and the fifth channel communicates with the first oil outlet;

[0040] The second mounting hole communicates with the second oil outlet through the sixth channel and the seventh channel; wherein, the second mounting hole communicates with the sixth channel, the sixth channel communicates with the seventh channel, and the seventh channel communicates with the second oil outlet;

[0041] The flow dividing and collecting valve is installed in the second mounting hole and is used to proportionally distribute the oil fluid introduced from the oil inlet to the fourth channel and the sixth channel, and then proportionally distribute the oil fluid to the first oil outlet and the second oil outlet.

[0042] Furthermore, an oil replenishing port, a first oil replenishing channel, and a second oil replenishing channel are also provided in the valve body;

[0043] The oil replenishing port communicates with the first oil replenishing channel, the first oil replenishing channel communicates with the first oil outlet, and a first one-way overflow valve is connected in the first oil replenishing channel so that the oil fluid injected from the oil replenishing port flows through the first one-way overflow valve and then flows into the first oil outlet;

[0044] The oil replenishing port is also communicated with the second oil replenishing channel, the second oil replenishing channel is communicated with the second oil outlet, and a second one-way overflow valve is connected in the second oil replenishing channel so that the oil injected from the oil replenishing port flows through the second one-way overflow valve and then flows into the second oil outlet.

[0045] Further, an upper connection channel and a lower connection channel are provided in the valve body;

[0046] The second oil replenishing channel is communicated with the second oil outlet through the upper connection channel; wherein, the second oil replenishing channel is communicated with the upper connection channel, and the upper connection channel is communicated with the second oil outlet;

[0047] The second oil replenishing channel is communicated with the oil replenishing port through the lower connection channel; wherein, the second oil replenishing channel is communicated with the lower connection channel, and the lower connection channel is communicated with the oil replenishing port.

[0048] Further, the anti-slip valve further includes a damping bolt;

[0049] An adjusting oil circuit is further provided in the valve body, one end of the adjusting oil circuit is communicated with the first oil outlet, and the other end of the adjusting oil circuit is communicated with the second oil outlet;

[0050] The damping bolt is installed in the adjusting oil circuit, and a second damping hole is provided in the damping bolt.

[0051] Further, the adjusting oil circuit includes an eighth channel, a ninth channel and a tenth channel;

[0052] The damping bolt is installed in the eighth channel;

[0053] One end of the eighth channel is communicated with the ninth channel, and the other end of the eighth channel is communicated with the tenth channel;

[0054] The ninth channel is communicated with the first oil outlet;

[0055] The tenth channel is communicated with the second oil outlet.

[0056] After adopting the above technical solution, the anti-slip valve of the embodiment of the present application is installed in a vehicle. One pump is used to supply oil to two hydraulic motors in the vehicle. One hydraulic motor is connected to a walking wheel on one side and used to drive the walking wheel on one side to rotate, and the other hydraulic motor is connected to a walking wheel on the other side and used to drive the walking wheel on the other side to rotate. In this embodiment, the oil inlet on the valve body is used to be connected to the pump and access the oil supplied by the pump, the first oil outlet is used to be connected to one of the hydraulic motors, and the second oil outlet is used to be connected to the other hydraulic motor.

[0057] When the traveling wheels on both sides are not suspended, switch the switching valve to the open state. At this time, the oil inlet is freely communicated with the first oil outlet and the second oil outlet through the switching valve. The oil supplied by the pump to the oil inlet will flow through the switching valve and be freely distributed to the first oil outlet and the second oil outlet according to the rotational speeds of the two hydraulic motors. The oil in the first oil outlet will flow into one of the hydraulic motors, and the oil in the second oil outlet will flow into the other hydraulic motor. Both hydraulic motors are in a free state. At this time, if the vehicle needs to turn with a small radius, the resistance of the outer traveling wheel will decrease while the resistance of the inner traveling wheel will increase. Therefore, the oil flow rate into the outer hydraulic motor increases, and the rotational speed of the outer hydraulic motor becomes faster, thereby driving the outer traveling wheel to rotate quickly. The oil flow rate into the inner hydraulic motor decreases, and the rotational speed of the inner hydraulic motor becomes slower, thereby driving the inner traveling wheel to rotate slower. In this way, the outer hydraulic motor will not experience a dragging rotation phenomenon.

[0058] When the traveling wheel on one side is suspended and slipping, switch the switching valve to the closed state. At this time, the oil inlet is disconnected from the first oil outlet and the second oil outlet, that is, the oil in the oil inlet cannot flow through the switching valve and be freely distributed to the first oil outlet and the second oil outlet. At this time, the oil in the oil inlet will flow into the second mounting hole and flow through the flow dividing and collecting valve and then be distributed to the first oil outlet and the second oil outlet in a 1:1 ratio. The oil in the first oil outlet will flow into one of the hydraulic motors, and the oil in the second oil outlet will flow into the other hydraulic motor. The oil flow rates into the two hydraulic motors are equal, so the two hydraulic motors will always rotate at the same speed, providing the best vehicle traction force. The oil will not all flow into one of the hydraulic motors, resulting in the suspended traveling wheel idling and slipping, avoiding the situation of slipping and being unable to move due to one side's traveling wheel being suspended. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A perspective view of one side of the anti-slip valve of the present invention;

[0060] Figure 2 A schematic structural view of the interior of the anti-slip valve of the present invention;

[0061] Figure 3 A perspective view of the other side of the anti-slip valve of the present invention;

[0062] Figure 4 The front view of the anti-slip valve of the present invention;

[0063] Figure 5 is Figure 4 the A-A sectional view of

[0064] Figure 6 is Figure 4 the B-B sectional view of;

[0065] Figure 7 is the structural schematic diagram of the switching valve of the present utility model;

[0066] Figure 8 is Figure 4 the C-C sectional view of;

[0067] Figure 9 is Figure 4 the D-D sectional view of;

[0068] Figure 10 is Figure 4 the E-E sectional view of;

[0069] Figure 11 is Figure 4 the F-F sectional view of;

[0070] Figure 12 is Figure 6 the G-G sectional view of. Specific embodiments

[0071] In order to make the content of the present utility model easier to be clearly understood, the following further describes the present utility model in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0072] As Figures 1 to 12 shown, an anti-slip valve includes a valve body 1, a switching valve 2 and a flow dividing and collecting valve 3;

[0073] The valve body 1 is provided with an oil inlet 4, a first oil outlet 5, a second oil outlet 6, a first mounting hole 7 and a second mounting hole 8;

[0074] The oil inlet 4 is respectively communicated with the first mounting hole 7 and the second mounting hole 8;

[0075] The first mounting hole 7 and the second mounting hole 8 are respectively communicated with the first oil outlet 5;

[0076] The first mounting hole 7 and the second mounting hole 8 are also respectively communicated with the second oil outlet 6;

[0077] The switching valve 2 is installed in the first mounting hole 7. The switching valve 2 is used to switch to an open state so that the oil inlet 4 is freely communicated with the first oil outlet 5 and the second oil outlet 6 respectively through the switching valve 2. The switching valve 2 is also used to switch to a closed state so that the oil inlet 4 is disconnected from the first oil outlet 5 and the second oil outlet 6 respectively;

[0078] The flow dividing and collecting valve 3 is installed in the second mounting hole 8 and is used to proportionally distribute the hydraulic fluid introduced from the oil inlet 4 to the first oil outlet 5 and the second oil outlet 6.

[0079] Specifically, the anti-slip valve of the embodiment of the present application is installed in a vehicle. In the vehicle, a pump is used to supply oil to two hydraulic motors. One hydraulic motor is connected to a walking wheel on one side and is used to drive the walking wheel on one side to rotate, and the other hydraulic motor is connected to a walking wheel on the other side and is used to drive the walking wheel on the other side to rotate. In this embodiment, the oil inlet 4 on the valve body 1 is used to be connected to the pump and introduce the hydraulic fluid supplied by the pump. The first oil outlet 5 is used to be connected to one of the hydraulic motors, and the second oil outlet 6 is used to be connected to the other hydraulic motor.

[0080] When neither of the walking wheels on both sides is suspended, the switching valve 2 is switched to the open state. At this time, the oil inlet 4 is freely communicated with the first oil outlet 5 and the second oil outlet 6 through the switching valve 2 respectively. The hydraulic fluid supplied by the pump to the oil inlet 4 will flow through the switching valve 2 and be freely distributed to the first oil outlet 5 and the second oil outlet 6 according to the rotational speeds of the two hydraulic motors. The hydraulic fluid in the first oil outlet 5 will flow into one of the hydraulic motors, and the hydraulic fluid in the second oil outlet 6 will flow into the other hydraulic motor. Both of the hydraulic motors are in a free state. At this time, if the vehicle needs to turn with a small turning radius, the resistance of the outer walking wheel will become smaller and the resistance of the inner walking wheel will become larger. Therefore, the oil flow rate into the outer hydraulic motor will increase, the rotational speed of the outer hydraulic motor will increase and then drive the outer walking wheel to rotate quickly, while the oil flow rate into the inner hydraulic motor will decrease, the rotational speed of the inner hydraulic motor will decrease and then drive the inner walking wheel to rotate slowly. In this way, the outer hydraulic motor will not experience a dragging rotation phenomenon.

[0081] In the case where the traveling wheels on one side are suspended and slipping, the switching valve 2 is switched to the closed state. At this time, the oil inlet 4 is disconnected from the first oil outlet 5 and the second oil outlet 6 for free communication, that is, the oil in the oil inlet 4 cannot flow through the switching valve 2 and be freely distributed to the first oil outlet 5 and the second oil outlet 6. At this time, the oil in the oil inlet 4 will flow into the second mounting hole 8 and flow through the flow dividing and collecting valve 3 and then be distributed to the first oil outlet 5 and the second oil outlet 6 in a ratio of 1:1. The oil in the first oil outlet 5 will flow into one of the hydraulic motors, and the oil in the second oil outlet 6 will flow into the other hydraulic motor. The oil flow rates flowing into the two hydraulic motors are equal, so the two hydraulic motors will always rotate at the same speed, which can provide the best vehicle traction force. The oil will not all flow into one of the hydraulic motors, resulting in the suspended traveling wheels spinning and slipping, avoiding the situation where the vehicle cannot move due to the suspension of the traveling wheels on one side.

[0082] In this embodiment, the specific structure of the flow dividing and collecting valve 3 is the prior art well-known to those skilled in the art, and will not be specifically described in this embodiment.

[0083] Such as Figure 8 shown, the anti-slip valve may further include a control valve 9;

[0084] The valve body 1 is further provided with an oil drain port 10, an oil drain oil path and a control chamber 11;

[0085] The control chamber 11 is communicated with the first mounting hole 7 and is hydraulically connected to the switching valve 2 installed in the first mounting hole 7;

[0086] The oil drain port 10 is connected to the oil drain oil path, and the oil drain oil path is communicated with the control chamber 11;

[0087] The control valve 9 is installed in the oil drain oil path and is used to control the on-off of the oil drain oil path, and further control the switching state of the switching valve 2 by controlling the oil pressure in the control chamber 11.

[0088] Such as Figure 8 shown, the oil drain oil path may include a first channel 12, a second channel 13 and a third channel 14;

[0089] The oil drain port 10 is communicated with the first channel 12;

[0090] The first channel 12 is communicated with the second channel 13;

[0091] The second channel 13 is communicated with the third channel 14;

[0092] The third channel 14 is communicated with the control chamber 11;

[0093] The control valve 9 is installed in the first channel 12 and is used to control the on-off of the first channel 12; specifically, the first channel 12 extends in the up-down direction, the second channel 13 extends in the front-back direction, the third channel 14 extends in the up-down direction, one end of the second channel 13 communicates with the third channel 14, a plug 15 is installed at the other end of the second channel 13, one end of the third channel 14 communicates with the control chamber 11, and a plug 15 is installed at the other end of the third channel 14. In this embodiment, the control valve 9 can be a two-position two-way solenoid valve, and the oil drain port 10 is used to connect to an external oil tank so that the drained oil flows into the oil tank.

[0094] As Figure 6 , 7 shown, the switching valve 2 can include a valve sleeve 16, a valve core 17 and a spring 18;

[0095] The valve sleeve 16 is inserted into the first mounting hole 7;

[0096] Between the valve sleeve 16 and the inner wall of the first mounting hole 7, there are a first annular cavity 19, a second annular cavity 20 and a third annular cavity 21 arranged in sequence from left to right. The first annular cavity 19 communicates with the first oil outlet 5, the second annular cavity 20 communicates with the oil inlet 4, and the third annular cavity 21 communicates with the second oil outlet 6;

[0097] On the valve sleeve 16, there are a first flow port 22, a second flow port 23, a third flow port 24 and a fourth flow port 25 arranged in sequence from left to right. The first flow port 22 communicates with the first annular cavity 19, the second flow port 23 and the third flow port 24 respectively communicate with the second annular cavity 20, the fourth flow port 25 communicates with the third annular cavity 21. Between the first flow port 22 and the second flow port 23, there is a first valve wall portion 26, and between the second flow port 23 and the third flow port, there is a second valve wall portion 27;

[0098] The valve core 17 is slidably arranged in the valve sleeve 16. In the valve sleeve 16, there is an open cavity 28 on the right side of the valve core 17 and a closed cavity 29 on the left side of the valve core 17;

[0099] In the valve core 17, there are an inner hole 30 and a first damping hole 31. The left end of the inner hole 30 communicates with the closed cavity 29, and the right end of the inner hole 30 communicates with the open cavity 28 through the first damping hole 31. The open cavity 28 communicates with the control chamber 11;

[0100] On the outer peripheral portion of the valve core 17, a first blocking portion 32, a second blocking portion 33, and a third blocking portion 34 are sequentially arranged from left to right. The first blocking portion 32, the second blocking portion 33, and the third blocking portion 34 are respectively in cooperation with the inner wall of the valve sleeve 16;

[0101] Between the outer peripheral portion of the valve core 17 and the inner wall of the valve sleeve 16, a first diversion cavity 35 is provided between the first blocking portion 32 and the second blocking portion 33, and a second diversion cavity 36 is provided between the second blocking portion 33 and the third blocking portion 34;

[0102] On the outer peripheral portion of the second blocking portion 33, an annular channel 37 is provided. In the second blocking portion 33, a communication hole 38 is provided. One end of the communication hole 38 is in communication with the annular channel 37, and the other end of the communication hole 38 is in communication with the inner hole 30;

[0103] During the sliding process of the valve core 17 in the valve sleeve 16, there are an open position where it slides in place to the right and a closed position where it slides in place to the left;

[0104] When the valve core 17 slides to the right to the open position, the right end portion of the second blocking portion 33 cooperates with the second valve wall portion 27, and the first diversion cavity 35 is respectively in communication with the first flow port 22 and the second flow port 23, and the second diversion cavity 36 is respectively in communication with the third flow port and the fourth flow port 25, and the second flow port 23 remains in communication with the annular channel 37;

[0105] When the valve core 17 slides to the left to the closed position, the left end portion of the second blocking portion 33 cooperates with the first valve wall portion 26 to block and separate the first diversion cavity 35 from the second flow port 23, and the third blocking portion 34 moves to the left to block the fourth flow port 25, and the second flow port 23 remains in communication with the annular channel 37;

[0106] The spring 18 is installed in the valve sleeve 16 and connected to the valve core 17. When the control valve 9 is opened, the pressure in the open cavity 28 is less than the pressure in the closed cavity 29, thereby driving the valve core 17 to move to the right to the open position. When the control valve 9 is closed, the pressure in the open cavity 28 is the same as the pressure in the closed cavity 29, thereby driving the valve core 17 to slide to the left to the closed position through the spring 18.

[0107] Specifically, when the control valve 9 is opened, the oil drain passage is opened. At this time, a part of the oil fluid at the oil inlet 4 will flow through the second annular cavity 20, the second communication port 23, the annular passage 37, the communication hole 38, the inner hole 30, the first damping hole 31, the open cavity 28, the control cavity 11 and the oil drain passage in sequence and then be discharged from the oil drain port 10. Under the action of the first damping hole 31, the pressure in the open cavity 28 is less than the pressure in the inner hole 30, and the pressure in the closed cavity 29 is equal to the pressure in the inner hole 30. Therefore, the pressure in the closed cavity 29 is greater than the pressure in the open cavity 28. Under the action of the pressure difference, the spool 17 will be pushed to move rightward to the open position. When the spool 17 is in the open position, the first diversion cavity 35 communicates with the first communication port 22 and the second communication port 23 respectively, and the second diversion cavity 36 communicates with the third communication port and the fourth communication port 25 respectively. At this time, a part of the oil fluid at the oil inlet 4 will flow through the second annular cavity 20, the second communication port 23, the first diversion cavity 35, the first communication hole and the first annular cavity 19 in sequence and then flow into the first oil outlet 5. Another part of the oil fluid at the oil inlet 4 will flow through the second annular cavity 20, the third communication port, the second diversion cavity 36, the fourth communication hole and the third annular cavity 21 in sequence and then flow into the second oil outlet 6. At this time, the switching valve 2 is in the open state, and the oil inlet 4 can be freely communicated with the first oil outlet 5 and the second oil outlet 6 through the switching valve 2. The oil fluid at the oil inlet 4 can be freely distributed into the first oil outlet 5 and the second oil outlet 6.

[0108] More specifically, when the control valve 9 is closed, the oil drain passage is closed. At this time, the oil in the control chamber 11 cannot be discharged from the oil drain passage and the oil drain port 10. The oil in the control chamber 11, the open chamber 28, and the inner hole 30 all stops flowing. At this time, the oil pressures in the open chamber 28, the inner hole 30, and the closed chamber 29 are all equal. There is no pressure difference between the left and right sides of the valve core 17, and the valve core 17 will move leftward under the drive of the spring 18 to the closed position. When the valve core 17 is in the closed position, the left end of the second sealing portion 33 cooperates with the first valve wall portion 26 to block and separate the first diversion chamber 35 from the second communication port 23, and the third sealing portion 34 moves leftward to block the fourth communication port 25. At this time, the oil from the oil inlet 4 cannot flow through the switching valve 2 and be freely distributed to the first oil outlet 5 and the second oil outlet 6, that is, the oil inlet 4 is disconnected from the first oil outlet 5 and the second oil outlet 6 for free communication, and the switching valve 2 is in the closed state. At this time, the oil in the oil inlet 4 can only flow into the second mounting hole 8 and flow through the flow dividing and collecting valve 3 and then be distributed to the first oil outlet 5 and the second oil outlet 6 in a 1:1 ratio.

[0109] As Figure 6 , 7 shown, on the outer peripheral wall of the valve sleeve 16, a first sealing portion 39, a second sealing portion 40, a third sealing portion 41, and a fourth sealing portion 42 are provided in sequence from left to right;

[0110] The first sealing portion 39, the second sealing portion 40, the third sealing portion 41, and the fourth sealing portion 42 are all in sealing cooperation with the inner wall of the first mounting hole 7;

[0111] The first annular chamber 19 is located between the first sealing portion 39 and the second sealing portion 40, the second annular chamber 20 is located between the second sealing portion 40 and the third sealing portion 41, and the third annular chamber 21 is located between the third sealing portion 41 and the fourth sealing portion 42.

[0112] As Figures 9 to 11 shown, a fourth passage 43, a fifth passage 44, a sixth passage 45, and a seventh passage 46 may be provided in the valve body 1;

[0113] The second mounting hole 8 communicates with the first oil outlet 5 through the fourth passage 43 and the fifth passage 44; wherein, the second mounting hole 8 communicates with the fourth passage 43, the fourth passage 43 communicates with the fifth passage 44, and the fifth passage 44 communicates with the first oil outlet 5;

[0114] The second mounting hole 8 communicates with the second oil outlet 6 through the sixth channel 45 and the seventh channel 46; wherein, the second mounting hole 8 communicates with the sixth channel 45, the sixth channel 45 communicates with the seventh channel 46, and the seventh channel 46 communicates with the second oil outlet 6;

[0115] The flow dividing and collecting valve 3 is installed in the second mounting hole 8 and is used to proportionally distribute the oil fluid introduced from the oil inlet 4 to the fourth channel 43 and the sixth channel 45, so as to proportionally distribute the oil fluid to the first oil outlet 5 and the second oil outlet 6. Specifically, the fourth channel 43 and the sixth channel 45 extend in the front-rear direction, the fifth channel 44 and the seventh channel 46 extend in the up-down direction, one end of the fourth channel 43 communicates with the second mounting hole 8, a plug 15 is installed at the other end of the fourth channel 43, one end of the fifth channel 44 communicates with the fourth channel 43, and a plug 15 is installed at the other end of the fifth channel 44. One end of the sixth channel 45 communicates with the second mounting hole 8, a plug 15 is installed at the other end of the sixth channel 45, one end of the seventh channel 46 communicates with the sixth channel 45, and a plug 15 is installed at the other end of the seventh channel 46.

[0116] As Figure 12 shown, a oil replenishing port 47, a first oil replenishing channel 48 and a second oil replenishing channel 49 are further provided in the valve body 1;

[0117] The oil replenishing port 47 communicates with the first oil replenishing channel 48, the first oil replenishing channel 48 communicates with the first oil outlet 5, and a first one-way overflow valve 50 is connected in the first oil replenishing channel 48 so that the oil fluid injected from the oil replenishing port 47 flows through the first one-way overflow valve 50 and then flows into the first oil outlet 5;

[0118] The oil replenishing port 47 also communicates with the second oil replenishing channel 49, the second oil replenishing channel 49 communicates with the second oil outlet 6, and a second one-way overflow valve 51 is connected in the second oil replenishing channel 49 so that the oil fluid injected from the oil replenishing port 47 flows through the second one-way overflow valve 51 and then flows into the second oil outlet 6.

[0119] Specifically, during the oil replenishing process, the oil fluid injected from the oil replenishing port 47 will flow into the first oil replenishing channel 48, flow through the first one-way overflow valve 50 and then flow to the first oil outlet 5, and the oil fluid injected from the oil replenishing port 47 will also flow into the second oil replenishing channel 49, flow through the second one-way overflow valve 51 and then flow to the second oil outlet 6, thereby completing the replenishment of the oil fluid. Among them, the first one-way overflow valve 50 and the second one-way overflow valve 51 both act as one-way valves during the oil replenishing process.

[0120] More specifically, during normal operation, when the pressure at the first oil outlet 5 exceeds the overflow pressure of the first one-way overflow valve 50, the oil at the first oil outlet 5 will flow through the first oil replenishing channel 48, pass through the first one-way overflow valve 50, and then be discharged from the oil replenishing port 47, thereby ensuring the stable pressure at the first oil outlet 5. When the pressure at the second oil outlet 6 exceeds the overflow pressure of the second one-way overflow valve 51, the oil at the second oil outlet 6 will flow through the second oil replenishing channel 49, pass through the second one-way overflow valve 51, and then be discharged from the oil replenishing port 47, thereby ensuring the stable pressure at the second oil outlet 6. Among them, during the normal operation and overflow process, both the first one-way overflow valve 50 and the second one-way overflow valve 51 function as overflow valves. Among them, the one-way overflow valve can also be called an oil replenishing overflow valve, and the specific structure of the one-way overflow valve is well-known prior art to those skilled in the art and will not be specifically described in this embodiment.

[0121] In this embodiment, the first oil replenishing channel 48 is communicated with the fifth channel 44, so the first oil replenishing channel 48 is communicated with the first oil outlet 5 through the fifth channel 44.

[0122] As Figure 12 shown, an upper connection channel 52 and a lower connection channel 53 are provided in the valve body 1;

[0123] The second oil replenishing channel 49 is communicated with the second oil outlet 6 through the upper connection channel 52; among them, the second oil replenishing channel 49 is communicated with the upper connection channel 52, and the upper connection channel 52 is communicated with the second oil outlet 6;

[0124] The second oil replenishing channel 49 is communicated with the oil replenishing port 47 through the lower connection channel 53; among them, the second oil replenishing channel 49 is communicated with the lower connection channel 53, and the lower connection channel 53 is communicated with the oil replenishing port 47; specifically, one end of the upper connection channel 52 is communicated with the second oil outlet 6, a plug 15 is installed at the other end of the upper connection channel 52, one end of the lower connection channel 53 is communicated with the oil replenishing port 47, and a plug 15 is installed at the other end of the lower connection channel 53.

[0125] As Figure 12 shown, the anti-slip valve may further include a damping bolt 54;

[0126] An adjusting oil circuit is further provided in the valve body 1, one end of the adjusting oil circuit is communicated with the first oil outlet 5, and the other end of the adjusting oil circuit is communicated with the second oil outlet 6;

[0127] The damping bolt 54 is installed in the regulating oil circuit, and a second damping hole is provided in the damping bolt 54. Specifically, when the switching valve 2 is switched to the closed state, the oil inlet 4 is disconnected from the first oil outlet 5 and the second oil outlet 6 and is not in free communication with them. At this time, the oil fluid at the oil inlet 4 flows into the second mounting hole 8 and is proportionally distributed to the first oil outlet 5 and the second oil outlet 6 under the action of the flow dividing and collecting valve 3. At this time, the damping bolt 54 provided in the regulating oil circuit can adjust the distribution accuracy of the oil fluid being distributed to the first oil outlet 5 and the second oil outlet 6. Among them, the specific structure of the damping bolt 54 is prior art well-known to those skilled in the art and will not be specifically described in this embodiment.

[0128] As Figure 12 shown, the regulating oil circuit may include an eighth channel 55, a ninth channel 56 and a tenth channel 57;

[0129] The damping bolt 54 is installed in the eighth channel 55;

[0130] One end of the eighth channel 55 communicates with the ninth channel 56, and the other end of the eighth channel 55 communicates with the tenth channel;

[0131] The ninth channel 56 communicates with the first oil outlet 5;

[0132] The tenth channel 57 communicates with the second oil outlet 6; In this embodiment, the ninth channel 56 communicates with the fifth channel 44, so the ninth channel 56 communicates with the first oil outlet 5 through the fifth channel 44.

[0133] Specifically, the eighth channel 55 extends in the up and down direction, the ninth channel 56 and the tenth channel 57 extend in the left and right direction. One end of the ninth channel 56 communicates with the lower end of the eighth channel 55, a plug 15 is installed at the other end of the ninth channel 56, a plug 15 is installed at the upper end of the eighth channel 55, and the tenth channel 57 is coaxially arranged with the upper connecting channel 52.

[0134] Specifically, a vertical channel 58 is further provided in the valve body 1. The vertical channel 58 communicates with the oil inlet 4, and the second mounting hole 8 communicates with the vertical channel 58, so the oil inlet 4 communicates with the second mounting hole 8 through the vertical channel 58. Specifically, the lower end of the vertical channel 58 communicates with the second mounting hole 8, and a plug 15 is installed at the upper end of the vertical channel 58.

[0135] In this embodiment, the switching valve 2, the flow dividing and collecting valve 3, the control valve 9, the first one-way overflow valve 50, and the second one-way overflow valve 51 are all cartridge valves.

[0136] In summary, the anti-slip valve of the embodiment of the present application is installed in a vehicle. In the vehicle, a pump is used to supply oil to two hydraulic motors. One hydraulic motor is connected to a traveling wheel on one side and is used to drive the traveling wheel on one side to rotate, and the other hydraulic motor is connected to a traveling wheel on the other side and is used to drive the traveling wheel on the other side to rotate. In this embodiment, the oil inlet 4 on the valve body 1 is used to be connected to the pump and access the oil supplied by the pump. The first oil outlet 5 is used to be connected to one of the hydraulic motors, and the second oil outlet 6 is used to be connected to the other hydraulic motor.

[0137] When neither of the traveling wheels on both sides is suspended, the switching valve 2 is switched to the open state. At this time, the oil inlet 4 is freely communicated with the first oil outlet 5 and the second oil outlet 6 through the switching valve 2 respectively. The oil supplied by the pump to the oil inlet 4 will flow through the switching valve 2 and be freely distributed to the first oil outlet 5 and the second oil outlet 6 according to the rotational speeds of the two hydraulic motors. The oil in the first oil outlet 5 will flow into one of the hydraulic motors, and the oil in the second oil outlet 6 will flow into the other hydraulic motor. Both hydraulic motors are in a free state. At this time, if the vehicle needs to turn with a small radius, the resistance of the outer traveling wheel will become smaller and the resistance of the inner traveling wheel will become larger. Therefore, the oil flow rate into the outer hydraulic motor becomes larger, and the rotational speed of the outer hydraulic motor becomes faster, thereby driving the outer traveling wheel to rotate quickly. And the oil flow rate into the inner hydraulic motor becomes smaller, and the rotational speed of the inner hydraulic motor becomes slower, thereby driving the inner traveling wheel to rotate slower. In this way, the outer hydraulic motor will not have a dragging rotation phenomenon.

[0138] When one of the traveling wheels on one side is suspended and slips, the switching valve 2 is switched to the closed state. At this time, the oil inlet 4 is disconnected from the first oil outlet 5 and the second oil outlet 6, that is, the oil in the oil inlet 4 cannot flow through the switching valve 2 and be freely distributed to the first oil outlet 5 and the second oil outlet 6. At this time, the oil in the oil inlet 4 will flow into the second mounting hole 8 and flow through the flow dividing and collecting valve 3 and then be distributed to the first oil outlet 5 and the second oil outlet 6 in a ratio of 1:1. The oil in the first oil outlet 5 will flow into one of the hydraulic motors, and the oil in the second oil outlet 6 will flow into the other hydraulic motor. The oil flow rates into the two hydraulic motors are equal, so the two hydraulic motors will always rotate at the same speed, which can provide the best vehicle traction force. The oil will not all flow into one of the hydraulic motors, resulting in the suspended traveling wheel spinning and slipping, and avoiding the situation of slipping and being unable to move due to one of the traveling wheels on one side being suspended.

[0139] In the specific embodiments described above, the technical problems solved by the present utility model, the technical solutions and the beneficial effects have been further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An anti-slip valve, characterized in that, It includes a valve body (1), a switching valve (2) and a flow dividing and collecting valve (3); An oil inlet (4), a first oil outlet (5), a second oil outlet (6), a first mounting hole (7) and a second mounting hole (8) are provided in the valve body (1); The oil inlet (4) is respectively communicated with the first mounting hole (7) and the second mounting hole (8); The first mounting hole (7) and the second mounting hole (8) are respectively communicated with the first oil outlet (5); The first mounting hole (7) and the second mounting hole (8) are also respectively communicated with the second oil outlet (6); The switching valve (2) is installed in the first mounting hole (7). The switching valve (2) is used to switch to an open state so that the oil inlet (4) is freely communicated with the first oil outlet (5) and the second oil outlet (6) respectively through the switching valve (2). The switching valve (2) is also used to switch to a closed state so that the oil inlet (4) is disconnected from the first oil outlet (5) and the second oil outlet (6) respectively; The flow dividing and collecting valve (3) is installed in the second mounting hole (8) and is used to proportionally distribute the oil fluid introduced from the oil inlet (4) to the first oil outlet (5) and the second oil outlet (6); 2. The anti-slip valve according to claim 1, wherein It also includes a control valve (9); An oil drain port (10), an oil drain oil path and a control chamber (11) are further provided in the valve body (1); The control chamber (11) is communicated with the first mounting hole (7) and is hydraulically connected to the switching valve (2) installed in the first mounting hole (7); The oil drain port (10) is connected to the oil drain oil path, and the oil drain oil path is communicated with the control chamber (11); The control valve (9) is installed in the oil drain oil path and is used to control the on-off of the oil drain oil path, and further control the switching state of the switching valve (2) by controlling the oil pressure in the control chamber (11); 3. The anti-slip valve according to claim 2, characterized in that, The oil drain oil path includes a first channel (12), a second channel (13) and a third channel (14); The oil drain port (10) is communicated with the first channel (12); The first channel (12) is communicated with the second channel (13); The second channel (13) is communicated with the third channel (14); The third channel (14) is communicated with the control chamber (11); The control valve (9) is installed in the first channel (12) and is used to control the on-off of the first channel (12); 4. The anti-slip valve according to claim 2, characterized in that, The switching valve (2) includes a valve sleeve (16), a valve core (17) and a spring (18); The valve sleeve (16) is inserted into the first mounting hole (7); A first annular cavity (19), a second annular cavity (20) and a third annular cavity (21) are arranged in sequence from left to right between the valve sleeve (16) and the inner wall of the first mounting hole (7). The first annular cavity (19) is communicated with the first oil outlet (5), the second annular cavity (20) is communicated with the oil inlet (4), and the third annular cavity (21) is communicated with the second oil outlet (6); The valve sleeve (16) is provided with a first flow port (22), a second flow port (23), a third flow port (24) and a fourth flow port (25) arranged in sequence from left to right. The first flow port (22) communicates with the first annular cavity (19), the second flow port (23) and the third flow port (24) respectively communicate with the second annular cavity (20), the fourth flow port (25) communicates with the third annular cavity (21), and a first valve wall portion (26) is provided between the first flow port (22) and the second flow port (23), and a second valve wall portion (27) is provided between the second flow port (23) and the third flow port; The valve core (17) is slidably arranged in the valve sleeve (16). An open cavity (28) is provided on the right side of the valve core (17) in the valve sleeve (16), and a closed cavity (29) is provided on the left side of the valve core (17); The valve core (17) is provided with an inner hole (30) and a first damping hole (31). The left end of the inner hole (30) communicates with the closed cavity (29), the right end of the inner hole (30) communicates with the open cavity (28) through the first damping hole (31), and the open cavity (28) communicates with the control cavity (11); On the outer peripheral portion of the valve core (17), a first blocking portion (32), a second blocking portion (33) and a third blocking portion (34) are arranged in sequence from left to right. The first blocking portion (32), the second blocking portion (33) and the third blocking portion (34) respectively cooperate with the inner wall of the valve sleeve (16); A first flow guiding cavity (35) is provided between the first blocking portion (32) and the second blocking portion (33) and a second flow guiding cavity (36) is provided between the second blocking portion (33) and the third blocking portion (34) between the outer peripheral portion of the valve core (17) and the inner wall of the valve sleeve (16); An annular channel (37) is provided on the outer peripheral portion of the second blocking portion (33), and a communication hole (38) is provided in the second blocking portion (33). One end of the communication hole (38) communicates with the annular channel (37), and the other end of the communication hole (38) communicates with the inner hole (30); During the process of the valve core (17) sliding in the valve sleeve (16), it has an open position where it slides to the right in place and a closed position where it slides to the left in place; When the valve core (17) slides to the right to the open position, the right end portion of the second blocking portion (33) cooperates with the second valve wall portion (27), and the first flow guiding cavity (35) respectively communicates with the first flow port (22) and the second flow port (23), and the second flow guiding cavity (36) respectively communicates with the third flow port and the fourth flow port (25), and the second flow port (23) remains in communication with the annular channel (37); When the spool (17) slides leftward to the closed position, the left end of the second plugging portion (33) cooperates with the first valve wall portion (26) to block and separate the first diversion cavity (35) from the second communication port (23), and the third plugging portion (34) moves leftward to block the fourth communication port (25), and the second communication port (23) remains in communication with the annular channel (37); The spring (18) is installed in the valve sleeve (16) and connected to the spool (17). When the control valve (9) is open, the pressure in the open cavity (28) is less than the pressure in the closed cavity (29), thereby driving the spool (17) to move rightward to the open position. When the control valve (9) is closed, the pressure in the open cavity (28) is the same as the pressure in the closed cavity (29), thereby driving the spool (17) to slide leftward to the closed position through the spring (18).

5. The anti-slip valve according to claim 4, characterized in that, The outer peripheral wall of the valve sleeve (16) is provided with a first sealing portion (39), a second sealing portion (40), a third sealing portion (41), and a fourth sealing portion (42) arranged in sequence from left to right; The first sealing portion (39), the second sealing portion (40), the third sealing portion (41), and the fourth sealing portion (42) are all in sealing cooperation with the inner wall of the first mounting hole (7); The first annular cavity (19) is located between the first sealing portion (39) and the second sealing portion (40), the second annular cavity (20) is located between the second sealing portion (40) and the third sealing portion (41), and the third annular cavity (21) is located between the third sealing portion (41) and the fourth sealing portion (42).

6. The anti-slip valve according to claim 1, characterized in that, The valve body (1) is provided with a fourth channel (43), a fifth channel (44), a sixth channel (45), and a seventh channel (46); The second mounting hole (8) communicates with the first oil outlet (5) through the fourth channel (43) and the fifth channel (44); wherein, the second mounting hole (8) communicates with the fourth channel (43), the fourth channel (43) communicates with the fifth channel (44), and the fifth channel (44) communicates with the first oil outlet (5); The second mounting hole (8) communicates with the second oil outlet (6) through the sixth channel (45) and the seventh channel (46); wherein, the second mounting hole (8) communicates with the sixth channel (45), the sixth channel (45) communicates with the seventh channel (46), and the seventh channel (46) communicates with the second oil outlet (6); The flow dividing and collecting valve (3) is installed in the second mounting hole (8) and is used to proportionally distribute the oil fluid introduced from the oil inlet (4) into the fourth channel (43) and the sixth channel (45), thereby proportionally distributing the oil fluid into the first oil outlet (5) and the second oil outlet (6).

7. The anti-slip valve according to claim 1, characterized in that, The valve body (1) is further provided with a make-up oil port (47), a first make-up oil channel (48), and a second make-up oil channel (49); The oil replenishing port (47) is communicated with the first oil replenishing passage (48), the first oil replenishing passage (48) is communicated with the first oil outlet (5), and a first one-way overflow valve (50) is connected in the first oil replenishing passage (48) so that the oil liquid injected from the oil replenishing port (47) flows through the first one-way overflow valve (50) and then flows into the first oil outlet (5); The oil replenishing port (47) is also communicated with the second oil replenishing passage (49), the second oil replenishing passage (49) is communicated with the second oil outlet (6), and a second one-way overflow valve (51) is connected in the second oil replenishing passage (49) so that the oil liquid injected from the oil replenishing port (47) flows through the second one-way overflow valve (51) and then flows into the second oil outlet (6).

8. The anti-slip valve according to claim 7, characterized in that, An upper connecting passage (52) and a lower connecting passage (53) are provided in the valve body (1); The second oil replenishing passage (49) is communicated with the second oil outlet (6) through the upper connecting passage (52); wherein, the second oil replenishing passage (49) is communicated with the upper connecting passage (52), and the upper connecting passage (52) is communicated with the second oil outlet (6); The second oil replenishing passage (49) is communicated with the oil replenishing port (47) through the lower connecting passage (53); wherein, the second oil replenishing passage (49) is communicated with the lower connecting passage (53), and the lower connecting passage (53) is communicated with the oil replenishing port (47).

9. The anti-slip valve according to claim 1, characterized in that, It further includes a damping bolt (54); An adjusting oil passage is further provided in the valve body (1), one end of the adjusting oil passage is communicated with the first oil outlet (5), and the other end of the adjusting oil passage is communicated with the second oil outlet (6); The damping bolt (54) is installed in the adjusting oil passage, and a second damping hole is provided in the damping bolt (54).

10. The anti-slip valve according to claim 9, characterized in that, The adjusting oil passage includes an eighth passage (55), a ninth passage (56) and a tenth passage (57); The damping bolt (54) is installed in the eighth passage (55); One end of the eighth passage (55) is communicated with the ninth passage (56), and the other end of the eighth passage (55) is communicated with the tenth passage; The ninth passage (56) is communicated with the first oil outlet (5); The tenth passage (57) is communicated with the second oil outlet (6).

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