Hydraulic distributor of hydraulic suspension device

Abstract

A hydraulic distributor shell is provided with a main control valve cavity, an auxiliary valve cavity, a one-way valve cavity and a pressure compensation valve cavity, a main control valve is arranged in the main control valve cavity in a sliding mode, an auxiliary valve is arranged in the auxiliary valve cavity in a sliding mode, and a one-way valve is arranged in the one-way valve in a sliding mode. A pressure compensation valve is arranged in the pressure compensation valve cavity in a sliding mode. An oil inlet P, an oil outlet A, an oil return opening T1 and an oil return opening T2 are formed in the outer surface of the shell, the oil return opening T1 is communicated with the pressure compensation valve cavity, and the oil return opening T2 is communicated with the auxiliary valve cavity. An oil duct a, an oil duct b, an oil duct c and an oil duct d are arranged on the shell; the oil duct a is simultaneously communicated with the main control valve cavity and the one-way valve cavity; the oil duct b is simultaneously communicated with the oil outlet A and the auxiliary valve cavity; the oil duct c is communicated with the oil inlet P and the pressure compensation valve cavity at the same time; and the oil duct d is simultaneously communicated with the main control valve cavity and the pressure compensation valve cavity. The operation quality of the tractor can be improved, and potential safety hazards are eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic suspension devices, and in particular relates to a hydraulic distributor of a hydraulic suspension device. Background Art

[0002] The hydraulic distributor of the hydraulic hitch is used to control the agricultural implements attached to the rear of the tractor. During tractor operation, the agricultural implements attached may vibrate. Figure 8 As shown, when the main control valve 2 of the hydraulic distributor in the prior art is in the stopped position, residual pressure will always exist in the oil channel a because the main control valve 2 blocks the oil channel a. This pressure will cause the one-way valve 5 to be loosely closed, resulting in a decrease in the pressure at the oil outlet A, causing the lifter to descend. The feedback device will push the main control valve 2 to move, causing the lifter to ascend. The frequent operation of the main control valve 2 causes the farm implement to vibrate.

[0003] During the operation of the tractor, the system pressure cannot be unloaded, and the system operates under high pressure, resulting in increased energy consumption and system heating. Figure 8 As shown, when the main control valve 2 is in the stopped position, the oil channel c and the oil channel d are in a connected state, and there is pressure in the oil channel d, which causes the pressure compensation valve 6 to be unable to open. The oil channel c is always in a high-pressure state, and the system cannot relieve pressure and always works under high pressure.

[0004] During the tractor's travel, the agricultural implements at a high position may slowly descend. This is because the valve core of the auxiliary valve 3 of the hydraulic distributor used in the prior art is a slide valve structure, which may cause hydraulic oil leakage. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a hydraulic distributor of a hydraulic suspension device, which can improve the operation quality of a tractor and eliminate potential safety hazards.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A hydraulic distributor of a hydraulic suspension device includes a shell, on which a main control valve chamber, an auxiliary valve chamber, a one-way valve chamber, and a pressure compensating valve chamber are provided. A main control valve is slidingly provided in the main control valve chamber, an auxiliary valve is slidingly provided in the auxiliary valve chamber, a one-way valve is slidingly provided in the one-way valve chamber, and a pressure compensating valve is slidingly provided in the pressure compensating valve chamber; an oil inlet P, an oil outlet A, an oil return port T1, and an oil return port T2 are provided on the outer surface of the shell, the oil return port T1 is connected to the pressure compensating valve chamber, and the oil return port T2 is connected to the auxiliary valve chamber; an oil channel a, an oil channel b, an oil channel c, and an oil channel d are provided on the shell; the oil channel a is simultaneously connected to the main control valve chamber and the one-way valve chamber; the oil channel b is simultaneously connected to the oil outlet A and the auxiliary valve chamber; the oil channel c is simultaneously connected to the oil inlet P and the pressure compensating valve chamber; the oil channel d is simultaneously connected to the main control valve chamber and the pressure compensating valve chamber.

[0008] Furthermore, the hydraulic distributor is provided with a stop working position, a lifting working position, and a lowering working position; when the hydraulic distributor is in the stop working position, the oil inlet P is connected to the oil return port T1 through the oil channel c, and the oil channel a is closed; when the hydraulic distributor is in the lifting working position, the oil inlet P is disconnected from the oil return port T1, and the oil inlet P is connected to the oil outlet A through the oil channel a and the oil channel b; the oil channel b is connected to the auxiliary valve chamber, and the auxiliary valve closes the oil return port T2; when the hydraulic distributor is in the lowering working position, the oil inlet P is connected to the oil return port T1 through the oil channel c, the oil outlet A is connected to the oil return port T2 through the oil channel b, and the oil channel a is closed.

[0009] Furthermore, a linkage plate is fixedly provided at the outer end of the main control valve, and an adjustment screw is provided on the linkage plate. When the main control valve moves to the leftmost position, the adjustment screw is separated from the left end of the auxiliary valve. When the main control valve moves to the rightmost position, the adjustment screw abuts against the left end of the auxiliary valve.

[0010] Furthermore, the main control valve includes a first section and a second section that are adjacent to each other, the outer diameter of the first section is smaller than the outer diameter of the second section, and the first section is located at the left end portion of the main control valve.

[0011] Furthermore, an oil return port T3 is provided on the outer surface of the housing, and an oil passage e is provided on the housing. The oil passage e is communicated with the main control valve chamber and the oil return port T3 at the same time.

[0012] Furthermore, a relief valve cavity is provided on the shell, a relief valve is provided in the relief valve cavity, and the relief valve cavity is communicated with the oil channel c; an oil return port T4 is also provided on the outer surface of the shell, and the relief valve cavity is communicated with the oil return port T4.

[0013] Furthermore, an oil passage f is provided on the housing, and the overflow valve chamber is communicated with the oil return port T4 through the oil passage f.

[0014] Furthermore, the auxiliary valve includes a valve sleeve, a conical valve core, a spring seat, a spring, a spring pad, and a connecting screw. The valve sleeve is fixedly installed on the housing, the conical valve core is slidably arranged inside the valve sleeve, and the conical valve cores are connected together by the connecting screws; the spring pad is fixedly installed on the left end portion of the valve sleeve, and the spring is arranged between the spring seat and the spring pad. When the spring is in a free state, the conical valve core is sealed at the right end portion of the valve sleeve.

[0015] Furthermore, the connecting screw includes a threaded portion and a smooth rod portion, the threaded portion is connected to the spring seat, and the cone valve core is loosely sleeved on the smooth rod portion.

[0016] Furthermore, the valve sleeve is threadedly connected to the housing.

[0017] After adopting the above technology, the beneficial effects of the utility model are:

[0018] The hydraulic distributor of a hydraulic hitch system of the present invention includes a housing, which is provided with a main control valve chamber, an auxiliary valve chamber, a check valve chamber, and a pressure compensation valve chamber. A main control valve is slidably mounted within the main control valve chamber, an auxiliary valve is slidably mounted within the auxiliary valve chamber, a check valve is slidably mounted within the check valve, and a pressure compensation valve is slidably mounted within the pressure compensation valve chamber. The outer surface of the housing is provided with an oil inlet P, an oil outlet A, an oil return port T1, and an oil return port T2. Oil return port T1 communicates with the pressure compensation valve chamber, and oil return port T2 communicates with the auxiliary valve chamber. The housing is provided with oil passages a, b, c, and d. Oil passage a communicates with both the main control valve chamber and the check valve chamber; oil passage b communicates with both the oil outlet A and the auxiliary valve chamber; oil passage c communicates with both the oil inlet P and the pressure compensation valve chamber; and oil passage d communicates with both the main control valve chamber and the pressure compensation valve chamber. The hydraulic distributor of a hydraulic hitch system of the present invention can improve the operating quality of a tractor and eliminate safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a hydraulic principle diagram of the hydraulic distributor of the hydraulic suspension device of the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the hydraulic distributor of the hydraulic suspension device of the present utility model;

[0021] Figure 3 It is a longitudinal sectional view of the hydraulic distributor of the hydraulic suspension device of the present invention in the lowered working position;

[0022] Figure 4 This is a longitudinal sectional view of the hydraulic distributor of the hydraulic suspension device of the present invention in the lifting working position;

[0023] Figure 5 This is a longitudinal sectional view of the hydraulic distributor of the hydraulic suspension device of the present invention in a stopped working position;

[0024] Figure 6 yes Figure 3 、 Figure 4 ,as well as Figure 5 Enlarged view of the main control valve;

[0025] Figure 7 yes Figure 3 、 Figure 4 ,as well as Figure 5 Enlarged view of the auxiliary valve;

[0026] Figure 8 It is a partial structural schematic diagram of a longitudinal sectional view of a hydraulic distributor of a hydraulic suspension device in the prior art in a stopped working position;

[0027] In the figure, the direction of the arrow indicates the flow direction of the liquid;

[0028] In the figure: 1. Housing; 2. Main control valve; 21. First section; 22. Second section; 3. Auxiliary valve; 31. Valve sleeve; 32. Cone valve core; 33. Spring seat; 34. Spring; 35. Connecting screw; 36. Spring washer; 4. Linkage plate; 5. Check valve; 6. Pressure compensation valve; 7. Overflow valve; 8. Adjusting screw. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the claims attached to the present invention.

[0030] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 ,as well as Figure 5 As shown together, a hydraulic distributor of a hydraulic suspension device includes a shell 1, on which a main control valve chamber, an auxiliary valve chamber, a one-way valve chamber, and a pressure compensation valve chamber are arranged. A main control valve 2 is slidingly arranged in the main control valve chamber, an auxiliary valve 3 is slidingly arranged in the auxiliary valve chamber, a one-way valve 5 is slidingly arranged in the one-way valve chamber, and a pressure compensation valve 6 is slidingly arranged in the pressure compensation valve chamber.

[0031] An oil inlet P, an oil outlet A, an oil return port T1 and an oil return port T2 are provided on the outer surface of the housing 1 . The oil return port T1 is connected to the pressure compensation valve chamber, and the oil return port T2 is connected to the auxiliary valve chamber.

[0032] Oil passages a, b, c, and d are provided on housing 1. Oil passage a communicates with both the main control valve chamber and the one-way valve chamber; oil passage b communicates with both the oil outlet A and the auxiliary valve chamber; oil passage c communicates with both the oil inlet P and the pressure compensation valve chamber; and oil passage d communicates with both the main control valve chamber and the pressure compensation valve chamber.

[0033] A linkage plate 4 is fixedly provided on the outer end of the main control valve 2, and an adjusting screw 8 is provided on the linkage plate 4. When the main control valve 2 moves to the leftmost position, the adjusting screw 8 is separated from the left end of the auxiliary valve 3. When the main control valve 2 moves to the rightmost position, the adjusting screw 8 abuts against the left end of the auxiliary valve 3.

[0034] Combine Figure 6 As shown, the main control valve 2 includes a first section 21 and a second section 22 adjacent to each other. The outer diameter of the first section 21 is smaller than the outer diameter of the second section 22 . The first section 21 is located at the left end of the main control valve 2 .

[0035] Combine Figure 3 、 Figure 4 ,as well as Figure 5 As shown together, an oil return port T3 is provided on the outer surface of the housing 1 , and an oil passage e is also provided on the housing 1 , and the oil passage e is communicated with the main control valve chamber and the oil return port T3 at the same time.

[0036] Preferably, a relief valve cavity is provided on the housing 1, a relief valve 7 is provided in the relief valve cavity, and the relief valve cavity is connected to the oil passage C. An oil return port T4 is also provided on the outer surface of the housing 1, and the relief valve cavity is connected to the oil return port T4.

[0037] Further preferably, an oil passage f is further provided on the housing 1 , and the relief valve chamber is communicated with the oil return port T4 through the oil passage f.

[0038] Combine Figure 3 、 Figure 4 、 Figure 5 ,as well as Figure 7 As shown, the auxiliary valve 3 includes a valve sleeve 31, a cone valve core 32, a spring seat 33, a spring 34, a spring washer 36, and a connecting screw 35. The valve sleeve 31 is fixedly mounted on the housing 1, and the cone valve core 32 is slidably disposed within the valve sleeve 31. The cone valve cores 32 are connected to each other via connecting screws 35. The spring washer 36 is fixedly mounted on the left end of the valve sleeve 31, and the spring 34 is disposed between the spring seat 33 and the spring washer 36. When the spring 34 is in a free state, the cone valve core 32 is sealed against the right end of the valve sleeve 31.

[0039] Preferably, the connecting screw 35 includes a threaded portion and a smooth rod portion, the threaded portion is connected to the spring seat 33, and the cone valve core 32 is loosely sleeved on the smooth rod portion.

[0040] Preferably, the valve sleeve 31 is threadedly connected to the housing 1 .

[0041] The auxiliary valve used in the present utility model refers to the Chinese utility model patent with the authorization announcement number "CN202203200U" and the patent name "Hydraulic distributor lowering valve".

[0042] Combine Figure 3 、 Figure 4 ,as well as Figure 5 As shown together, the hydraulic distributor is provided with a stop working position, a lifting working position, and a lowering working position.

[0043] Combine Figure 3 As shown, when the hydraulic distributor is in the lowering working position, the oil inlet P is connected to the oil return port T1 through the oil channel c, the oil outlet A is connected to the oil return port T2 through the oil channel b, and the oil channel a is closed.

[0044] Combine Figure 5 As shown, when the hydraulic distributor is in the stopped position, the oil inlet P is connected to the oil return port T1 through the oil channel c, and the oil channel a is closed. Because the outer diameter of the first section 21 of the main control valve 2 is smaller than the outer diameter of the second section 22, there is a gap between the outer peripheral surface of the first section 21 of the main control valve 2 and the inner wall of the main control valve chamber, and the oil channel a is connected to the gap. The hydraulic oil remaining in the oil channel a can leak out through the gap, and there is no residual pressure in the oil channel a. This effectively avoids the problem in the prior art where the first section 21 and the second section 22 of the main control valve 2 have the same outer diameter, the main control valve 2 blocks the oil channel a, resulting in the existence of residual pressure in the oil channel a. The residual pressure can cause the one-way valve 5 to be loosely closed, resulting in hydraulic oil leakage, a drop in the pressure at the oil outlet A, and the lifter to descend. The feedback device will push the main control valve 2 to move, causing the lifter to ascend, and the main control valve 2 to frequently operate and cause vibration.

[0045] When the main control valve 2 is in the stop position, the oil channel c and the oil channel d are not connected, and the oil channel d and the oil channel e are connected. The hydraulic oil in the oil channel d is completely leaked through the oil channel e and the return oil port T3. The pressure compensation valve 6 is opened, and the pressure in the oil channel c is unloaded through the return oil port T1. The system will run in the unloaded state, the energy consumption of the whole machine is reduced, and the heat generation is reduced.

[0046] Combine Figure 4 As shown, when the hydraulic distributor is in the lifting working position, the oil inlet P is connected to the oil channel c, the oil channel d is connected to the oil channel c, the pressure compensation valve 6 is in a closed state, the oil inlet P is disconnected from the oil return port T1, and the oil inlet P is connected to the oil outlet A through the oil channel a and the oil channel b; the oil channel b is connected to the auxiliary valve chamber, and the auxiliary valve 3 closes the oil return port T2.

[0047] The auxiliary valve 3 uses a cone valve core, which can effectively prevent the hydraulic oil from leaking through the oil return port T2. When the tractor is driving, the agricultural implement in a high position can effectively avoid the phenomenon of slowly descending.

[0048] The hydraulic distributor of the hydraulic suspension device of the present invention only improves the structures of the main control valve and the auxiliary valve. The remaining structures, working principles, and working processes are the same as those of the hydraulic distributor of the hydraulic suspension device in the prior art.

[0049] The technical features named with serial numbers involved in this manual (such as the first section, the second section, oil return port T1, oil return port T2, oil return port T3, oil return port T4, oil channel a, oil channel b, oil channel c, oil channel d, oil channel e, etc.) are only for distinguishing the various technical features and do not represent the positional relationship, installation sequence and working sequence between the various technical features.

[0050] In the description of this specification, it should be understood that the orientations or positional relationships described as "inner wall", "horizontal", "leftmost", "rightmost", "left end", "right end", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] The present invention is not limited to the above embodiments, and all improvements based on the concept, principle, structure and method of the present invention are within the scope of protection of the present invention.

Claims

1. A hydraulic distributor for a hydraulic suspension device, characterized in that: The invention comprises a housing, on which a main control valve chamber, an auxiliary valve chamber, a one-way valve chamber, and a pressure compensating valve chamber are provided. A main control valve is slidably provided in the main control valve chamber, an auxiliary valve is slidably provided in the auxiliary valve chamber, a one-way valve is slidably provided in the one-way valve chamber, and a pressure compensating valve is slidably provided in the pressure compensating valve chamber. An oil inlet P, an oil outlet A, an oil return port T1, and an oil return port T2 are provided on the outer surface of the housing. The oil return port T1 is connected to the pressure compensating valve chamber, and the oil return port T2 is connected to the auxiliary valve chamber. The housing is provided with oil passage a, oil passage b, oil passage c, and oil passage d; the oil passage a is simultaneously connected to the main control valve chamber and the one-way valve chamber; the oil passage b is simultaneously connected to the oil outlet A and the auxiliary valve chamber; the oil passage c is simultaneously connected to the oil inlet P and the pressure compensation valve chamber; the oil passage d is simultaneously connected to the main control valve chamber and the pressure compensation valve chamber.

2. The hydraulic distributor of the hydraulic suspension device according to claim 1, characterized in that: The hydraulic distributor is provided with a stop working position, a lifting working position, and a lowering working position; When the hydraulic distributor is in the stopped position, the oil inlet P is connected to the oil return port T1 through the oil passage c, and the oil passage a is closed; When the hydraulic distributor is in the lifting working position, the oil inlet P is disconnected from the oil return port T1, and the oil inlet P is connected to the oil outlet A through the oil passage a and the oil passage b; the oil passage b is connected to the auxiliary valve chamber, and the auxiliary valve closes the oil return port T2; When the hydraulic distributor is in the descending working position, the oil inlet P is connected to the oil return port T1 through the oil passage c, the oil outlet A is connected to the oil return port T2 through the oil passage b, and the oil passage a is closed.

3. The hydraulic distributor of the hydraulic suspension device according to claim 2, characterized in that: A linkage plate is fixedly provided at the outer end of the main control valve, and an adjustment screw is provided on the linkage plate. When the main control valve moves to the leftmost position, the adjustment screw is separated from the left end of the auxiliary valve. When the main control valve moves to the rightmost position, the adjustment screw abuts against the left end of the auxiliary valve.

4. The hydraulic distributor of the hydraulic suspension device according to claim 2, characterized in that: The main control valve includes a first section and a second section adjacent to each other. The outer diameter of the first section is smaller than the outer diameter of the second section. The first section is located at the left end of the main control valve.

5. The hydraulic distributor of the hydraulic suspension device according to claim 2, characterized in that: An oil return port T3 is further provided on the outer surface of the housing, and an oil passage e is further provided on the housing. The oil passage e is communicated with the main control valve chamber and the oil return port T3 at the same time.

6. The hydraulic distributor of the hydraulic suspension device according to claim 2, characterized in that: The housing is further provided with a relief valve cavity, in which a relief valve is provided, and the relief valve cavity is communicated with the oil passage c; the outer surface of the housing is further provided with an oil return port T4, and the relief valve cavity is communicated with the oil return port T4.

7. The hydraulic distributor of the hydraulic suspension device according to claim 6, characterized in that: The housing is further provided with an oil passage f, through which the overflow valve chamber is communicated with the oil return port T4.

8. The hydraulic distributor of the hydraulic suspension device according to claim 2, characterized in that: The auxiliary valve includes a valve sleeve, a conical valve core, a spring seat, a spring, a spring washer, and a connecting screw. The valve sleeve is fixedly installed on the housing, the conical valve core is slidably arranged inside the valve sleeve, and the conical valve cores are connected together by the connecting screws; the spring washer is fixedly installed on the left end portion of the valve sleeve, and the spring is arranged between the spring seat and the spring washer. When the spring is in a free state, the conical valve core is sealed on the right end portion of the valve sleeve.

9. The hydraulic distributor of the hydraulic suspension device according to claim 8, characterized in that: The connecting screw includes a threaded portion and a polished rod portion, the threaded portion is connected to the spring seat, and the cone valve core is loosely sleeved on the polished rod portion.

10. The hydraulic distributor of the hydraulic suspension device according to claim 8, characterized in that: The valve sleeve is threadedly connected to the housing.

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