Main clutch combined with independent speed regulation hydraulic system

Abstract

The utility model provides a kind of main clutch independent speed regulation hydraulic system, including main clutch oil cylinder, valve block and throttling component, the valve block is equipped with pressure oil circuit, oil return circuit, multiway valve and first overflow valve;The pressure oil circuit is connected with oil supply equipment;The pressure oil port of the multiway valve is connected pressure oil circuit, and the working oil port of multiway valve is equipped with working branch and overflow branch;The oil return port of overflow branch and multiway valve is all connected the oil return circuit, and first overflow valve is equipped on overflow branch;Working branch is connected one end of the throttling component, and the other end of throttling component is connected the main clutch oil cylinder.Adopting the utility model, the retracting speed of main clutch oil cylinder is controlled by first overflow valve and throttling component jointly, the retracting speed of main clutch oil cylinder is significantly reduced under the prerequisite that the size of throttling hole of throttling component is not reduced, and the main clutch combination speed controlled by hydraulic oil cylinder is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of main clutch hydraulic system for harvesters, specifically to a main clutch combined with independent speed regulation hydraulic system. Background Technology

[0002] The main clutch transmission is a crucial working device on corn harvesters. Through the combined action of a hydraulic cylinder and a spring, it drives a tensioner pulley to tension or disengage the main drive belt, thereby controlling the operation of the entire vehicle's working mechanism. The engagement speed of the main clutch, controlled by the hydraulic cylinder, significantly impacts the engine load and the impact forces on the vehicle's transmission. Currently, engagement speed is typically adjusted by increasing or decreasing the size of the throttle orifice, thus achieving speed regulation. However, an excessively small throttle orifice drastically increases the risk of clogging. Therefore, a safe and reliable engagement speed adjustment method is urgently needed that balances a slower engagement speed with reduced throttle orifice clogging risk. Utility Model Content

[0003] To solve at least one of the above technical problems, this utility model provides a hydraulic system with independent speed regulation based on a main clutch.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a main clutch-operated independent speed-regulating hydraulic system, including a main clutch cylinder, a valve block, and a throttling component. The valve block is provided with a pressure oil circuit, a return oil circuit, a multi-way valve, and a first relief valve. The pressure oil circuit is connected to an oil supply device. The pressure port of the multi-way valve is connected to the pressure oil circuit, and the working port of the multi-way valve is provided with a working branch and an overflow branch. The overflow branch and the return oil port of the multi-way valve are both connected to the return oil circuit, and the first relief valve is provided on the overflow branch. The working branch is connected to one end of the throttling component, and the other end of the throttling component is connected to the main clutch cylinder.

[0005] The beneficial effects of this utility model are: By employing this invention, an overflow branch and a first overflow valve are added between the working port and the return oil circuit of the multi-way valve. This allows the first overflow valve and the throttling component to jointly control the retraction speed of the main clutch cylinder. Without reducing the size of the throttling orifice of the throttling component, the retraction speed of the main clutch cylinder is significantly reduced, thus reducing the engagement speed of the main clutch controlled by the hydraulic cylinder. At the same time, it avoids the increased risk of blockage caused by an excessively small throttling orifice, thereby improving safety.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, an oil supply valve is also provided on the working branch.

[0008] By controlling the opening of the oil supply valve, the main clutch cylinder can be fed or discharged oil through the oil supply valve, making operation convenient. At the same time, when the oil supply valve is disconnected, the main clutch cylinder can be held in any position, avoiding overload of the clutch structure caused by the main clutch cylinder driving the clutch structure due to excessive oil supply time of the multi-way valve.

[0009] Furthermore, the oil supply valve is located inside the valve block.

[0010] It has a compact structure and occupies little space.

[0011] Furthermore, the valve block is also equipped with a second relief valve, the inlet of which is connected to the pressure oil circuit, and the outlet of which is connected to the return oil circuit.

[0012] This facilitates the initial overflow of oil in the pressure oil circuit, ensuring stable oil pressure from the pressure oil circuit to the multi-way valve, and making it easier to control the retraction speed of the main clutch cylinder.

[0013] Furthermore, the valve block is also equipped with a pressure relief valve, which is connected in parallel with the second overflow valve.

[0014] When the pressure relief valve is opened, the oil pressure in the pressure oil circuit can be completely released to the return oil circuit, thereby causing the main clutch cylinder to lose pressure and return to its original position, which facilitates emergency response and improves safety.

[0015] Furthermore, the throttling component includes a throttling valve and a check valve connected in parallel. The check valve allows oil to flow unidirectionally from the main clutch cylinder to the multi-way valve.

[0016] When oil enters the main clutch cylinder, it is throttled through a throttle valve to control the retraction speed of the main clutch cylinder; when the main clutch cylinder resets, the oil in the main clutch cylinder can be quickly returned through a one-way valve to facilitate rapid disengagement of the main clutch and improve the response speed.

[0017] Furthermore, a reset component is fixedly connected between the piston rod of the main clutch cylinder and the cylinder body.

[0018] This facilitates the rapid reset of the main clutch cylinder, thereby enabling the rapid disengagement of the main clutch.

[0019] Furthermore, the main clutch cylinder is a two-way cylinder, and the other end of the throttling component is connected to the small cavity of the main clutch cylinder; the reset component is used to drive the main clutch cylinder to extend.

[0020] The main clutch cylinder retracts slowly through the throttling component and valve block, facilitating the slow engagement of the main clutch. When the valve block returns oil, the reset component can quickly reset the main clutch cylinder, facilitating the rapid disengagement of the main clutch, thus improving the reliability of the main clutch operation.

[0021] Furthermore, the oil supply equipment includes a hydraulic pump and an oil tank. The inlet of the hydraulic pump is connected to the oil tank through a pipeline, and the outlet of the hydraulic pump is connected to the pressure oil circuit through a pipeline; the return oil circuit is connected to the oil tank through a pipeline.

[0022] It facilitates the supply of oil to the pressure oil circuit, and the oil can be recycled, resulting in low operating costs.

[0023] Furthermore, an oil filter is also connected to the inlet of the hydraulic pump.

[0024] It facilitates the filtration of the hydraulic pump's inlet oil, improves oil cleanliness, and prevents clogging of the throttling components. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the throttling component and the main clutch cylinder.

[0027] In the accompanying drawings, the technical features represented by each reference numeral are as follows: 1-Main clutch cylinder; 2-Valve block; 3-Throttle component; 4-Multi-way valve; 5-Oil supply valve; 6-First relief valve; 7-Second relief valve; 8-Pressure relief valve; 9-Throttle valve; 10-Check valve; 11-Reset component; 12-Hydraulic pump; 13-Oil tank; 14-Oil filter. Detailed Implementation

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0029] This utility model refers to Figure 1-2 .

[0030] This utility model provides a main clutch-operated independent speed-regulating hydraulic system, including a main clutch cylinder 1, a valve block 2, and a throttling component 3. The valve block 2 is provided with a pressure oil circuit, a return oil circuit, a multi-way valve 4, and a first relief valve 6. The pressure oil circuit is connected to an oil supply device. The pressure port of the multi-way valve 4 is connected to the pressure oil circuit, and the working port of the multi-way valve 4 is provided with a working branch and an overflow branch. The overflow branch and the return oil port of the multi-way valve 4 are both connected to the return oil circuit, and the first relief valve 6 is provided on the overflow branch. The working branch is connected to one end of the throttling component 3, and the other end of the throttling component 3 is connected to the main clutch cylinder 1.

[0031] principle: The oil supply equipment can be a hydraulic pump 12 from the harvester, etc.; during installation, the extension and retraction end of the main clutch cylinder 1 can be fixedly connected to the tension wheel mounting bracket of the main clutch. The main clutch structure is an existing component on the harvester and belongs to the prior art. This utility model is used to control the retraction or extension speed of the main clutch cylinder 1. The main clutch cylinder 1 pushes the tension wheel to tension the main drive belt, thereby controlling the operation of the entire vehicle's working mechanism. Taking the retraction control of the main clutch cylinder 1 to engage the main clutch as an example, the specific return process is as follows: the oil supply equipment supplies oil to the pressure oil circuit. The oil in the pressure oil circuit passes through the multi-way valve 4 to achieve initial pressure reduction. Then, the first overflow valve 6 overflows the excess pressure and part of the oil to the return oil circuit, stabilizing the pressure and flow rate of the working branch. Then, the throttling component 3 reduces the oil flow rate again through throttling before supplying it to the main clutch cylinder 1, thereby significantly reducing the retraction speed of the main clutch cylinder 1 and achieving the control purpose. The main clutch engagement speed can be adjusted by replacing the first relief valve 6 with one of suitable overflow pressure during maintenance, allowing it to be used for a longer period of time after speed adjustment.

[0032] When the main clutch cylinder 1 needs to extend, the multi-way valve 4 can be adjusted to the return oil state. The main clutch cylinder 1 can be a two-way cylinder with its own extension and reset function, or the main clutch cylinder 1 can be reset by an external spring or other reset mechanism. The main clutch cylinder 1 pushes the tension wheel to disengage from the main drive belt, thereby controlling the vehicle's working mechanism to stop working.

[0033] Preferably, the multi-way valve 4 is a two-position three-way valve, which is a prior art product, and its valve core is provided with a working position and an oil return position.

[0034] By employing this utility model, an overflow branch and a first overflow valve 6 are added between the working oil port and the return oil line of the multi-way valve 4. This allows the first overflow valve 6 and the throttling component 3 to jointly control the retraction speed of the main clutch cylinder 1. Without reducing the size of the throttling orifice of the throttling component 3, the retraction speed of the main clutch cylinder 1 is significantly reduced, thus reducing the engagement speed of the main clutch controlled by the hydraulic cylinder. At the same time, it avoids the increased risk of blockage caused by an excessively small throttling orifice, thereby improving safety.

[0035] Furthermore, an oil supply valve 5 is also provided on the working branch.

[0036] By controlling the opening of the oil supply valve 5, the main clutch cylinder 1 can be supplied with or returned with oil through the oil supply valve 5, which is convenient to operate; at the same time, when the oil supply valve 5 is disconnected, the main clutch cylinder 1 can be held in any position, avoiding the main clutch cylinder 1 from being overloaded due to excessive oil supply time of the multi-way valve 4.

[0037] Furthermore, the oil supply valve 5 is located inside the valve block 2.

[0038] It has a compact structure and occupies little space.

[0039] Furthermore, the valve block 2 is also provided with a second relief valve 7, the inlet of which is connected to the pressure oil circuit and the outlet of which is connected to the return oil circuit.

[0040] This facilitates the first overflow of oil in the pressure oil circuit, thereby stabilizing the oil pressure in the pressure oil circuit to the multi-way valve 4 and making it easier to control the retraction speed of the main clutch cylinder 1.

[0041] Furthermore, the valve block 2 is also provided with a pressure relief valve 8, which is connected in parallel with the second overflow valve 7.

[0042] When the pressure relief valve 8 is opened, the oil pressure in the pressure oil circuit can be completely released to the return oil circuit, thereby causing the main clutch cylinder 1 to lose pressure and return to its original position, which facilitates emergency response and improves safety.

[0043] Furthermore, the throttling component 3 includes a throttling valve 9 and a one-way valve 10 connected in parallel. The one-way valve 10 allows oil to flow unidirectionally from the main clutch cylinder 1 to the multi-way valve 4.

[0044] When oil enters the main clutch cylinder 1, it is throttled by the throttle valve 9 to control the retraction speed of the main clutch cylinder 1. When the main clutch cylinder 1 resets, the oil in the main clutch cylinder 1 can be quickly returned through the one-way valve 10 to facilitate the rapid separation of the main clutch and improve the response speed.

[0045] Furthermore, a reset member 11 is fixedly connected between the piston rod and the cylinder body of the main clutch cylinder 1.

[0046] This facilitates the rapid reset of the main clutch cylinder 1, thereby enabling the rapid disengagement of the main clutch.

[0047] Furthermore, the main clutch cylinder 1 is a two-way cylinder, and the other end of the throttling component 3 is connected to the small cavity of the main clutch cylinder 1; the reset component 11 is used to drive the main clutch cylinder 1 to extend.

[0048] Note: When oil flows out of the working port of the multi-way valve 4, pressurized oil enters the small chamber of the main clutch cylinder 1 (i.e., the piston rod side of the cylinder body of the main clutch cylinder 1) through the throttling component 3, thereby driving the main clutch cylinder 1 to retract against the elastic force of the reset member 11. When oil returns from the multi-way valve 4, the reset member 11 drives the main clutch cylinder 1 to extend under its own elastic force. Preferably, the reset member 11 is a spring. In addition, an oil tank 13 is also included, and the large chamber of the main clutch cylinder 1 is connected to the oil tank 13 through a pipeline.

[0049] The main clutch cylinder 1 is slowly retracted by the throttling component 3 and the valve block 2, which facilitates the slow engagement of the main clutch. When the valve block 2 returns oil, the reset component 11 can drive the main clutch cylinder 1 to quickly reset, which facilitates the rapid disengagement of the main clutch. This improves the reliability of the main clutch operation.

[0050] Furthermore, the oil supply device includes a hydraulic pump 12 and an oil tank 13. The inlet of the hydraulic pump 12 is connected to the oil tank 13 through a pipeline, and the outlet of the hydraulic pump 12 is connected to the pressure oil circuit through a pipeline. The return oil circuit is connected to the oil tank 13 through a pipeline.

[0051] It facilitates the supply of oil to the pressure oil circuit, and the oil can be recycled, resulting in low operating costs.

[0052] Furthermore, an oil filter 14 is also connected to the inlet of the hydraulic pump 12.

[0053] It facilitates the filtration of the inlet oil of the hydraulic pump 12, improves the cleanliness of the oil, and avoids clogging of the throttling component 3.

[0054] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0055] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0057] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0058] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A hydraulic system with independent speed regulation and main clutch engagement, characterized in that: It includes a main clutch cylinder (1), a valve block (2) and a throttling component (3). The valve block (2) is provided with a pressure oil circuit, a return oil circuit, a multi-way valve (4) and a first relief valve (6). The pressure oil circuit is connected to an oil supply device. The pressure oil port of the multi-way valve (4) is connected to the pressure oil circuit. The working oil port of the multi-way valve (4) is provided with a working branch and an overflow branch. The overflow branch and the return oil port of the multi-way valve (4) are both connected to the return oil circuit. The first relief valve (6) is provided on the overflow branch. The working branch is connected to one end of the throttling component (3), and the other end of the throttling component (3) is connected to the main clutch cylinder (1).

2. The main clutch-engaged independent speed-regulating hydraulic system according to claim 1, characterized in that: The working branch is also equipped with an oil supply valve (5).

3. The main clutch-engaged independent speed-regulating hydraulic system according to claim 2, characterized in that: The oil supply valve (5) is located inside the valve block (2).

4. The main clutch-engaged independent speed-regulating hydraulic system according to claim 1, characterized in that: The valve block (2) is also provided with a second overflow valve (7), the inlet of the second overflow valve (7) is connected to the pressure oil circuit, and the outlet of the second overflow valve (7) is connected to the return oil circuit.

5. The main clutch-engaged independent speed-regulating hydraulic system according to claim 4, characterized in that: The valve block (2) is also equipped with a pressure relief valve (8), which is connected in parallel with the second overflow valve (7).

6. The main clutch-engaged independent speed-regulating hydraulic system according to claim 1, characterized in that: The throttling component (3) includes a throttling valve (9) and a check valve (10) connected in parallel. The check valve (10) allows oil to flow unidirectionally from the main clutch cylinder (1) to the multi-way valve (4).

7. The main clutch-engaged independent speed-regulating hydraulic system according to claim 1, characterized in that: A reset component (11) is fixedly connected between the piston rod and the cylinder body of the main clutch cylinder (1).

8. The main clutch-engaged independent speed-regulating hydraulic system according to claim 7, characterized in that: The main clutch cylinder (1) is a two-way cylinder, and the other end of the throttling component (3) is connected to the small cavity of the main clutch cylinder (1); the reset component (11) is used to drive the main clutch cylinder (1) to extend.

9. The main clutch-engaged independent speed-regulating hydraulic system according to claim 1, characterized in that: The oil supply equipment includes a hydraulic pump (12) and an oil tank (13). The inlet of the hydraulic pump (12) is connected to the oil tank (13) through a pipeline, and the outlet of the hydraulic pump (12) is connected to the pressure oil circuit through a pipeline. The return oil circuit is connected to the oil tank (13) through a pipeline.

10. The main clutch-engaged independent speed-regulating hydraulic system according to claim 9, characterized in that: The inlet of the hydraulic pump (12) is also connected to an oil filter (14).

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