Hydraulic system with main clutch and auxiliary clutch

Abstract

The utility model provides a hydraulic system with a main clutch and an auxiliary clutch, which relates to the technical field of tractor clutches and comprises a hydraulic oil cylinder, a pedal trigger mechanism, a linkage mechanism, a clutch main shifting fork and a clutch auxiliary shifting fork. The pedal triggering mechanism is used for triggering the oil cylinder switch; the telescopic end of the hydraulic oil cylinder is connected with the clutch main shifting fork and the clutch auxiliary shifting fork through a linkage mechanism and can drive the clutch main shifting fork and the clutch auxiliary shifting fork to act. According to the utility model, the hydraulic oil cylinder can contract only by slightly treading the pedal trigger mechanism to start the trigger oil cylinder switch, and then the clutch main shifting fork and the clutch auxiliary shifting fork are driven to act through the linkage mechanism, so that the clutch action is realized, the operation is more labor-saving on the basis of ensuring the clutch action effect, and the working efficiency is improved. And the mode of providing power through inward contraction is adopted, space can be saved, structural arrangement is facilitated, and the space utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor clutches, in particular to a main and auxiliary clutch hydraulic system. Background Art

[0002] A tractor is a self-propelled power machine used to tow and drive work machinery to complete various mobile operations. It is widely used in industry and daily life.

[0003] The clutch pedal of a traditional tractor is usually not provided with a clutch assist, and it is rather laborious to step on it. In response to this, a clutch pedal with a clutch assist has appeared. However, the assist source of the existing clutch assist pedal is mostly the extension power of the oil cylinder, and the outward extension method occupies a large space, which is not conducive to structural layout. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic system with a main and auxiliary clutch to solve the above-mentioned technical problems existing in the prior art; the preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects; see the following description for details.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a main-and-sub clutch hydraulic system, comprising a hydraulic oil cylinder, a pedal trigger mechanism, a linkage mechanism, a clutch main fork and a clutch sub fork, wherein: the hydraulic oil cylinder is provided with a cylinder switch for starting the hydraulic oil cylinder contraction action; the pedal trigger mechanism is used for triggering the cylinder switch; the telescopic end of the hydraulic oil cylinder is connected with the clutch main fork and the clutch sub fork through the linkage mechanism, and can drive the clutch main fork and the clutch sub fork to move.

[0007] Preferably, the pedal trigger mechanism includes a pedal assembly, a transmission rod and a trigger member, wherein: the pedal assembly is hinged on the frame, and the pedal assembly is connected to the trigger member through the transmission rod; by stepping on the pedal assembly, the transmission rod can drive the trigger member to move, and the trigger member triggers the cylinder switch to cause the hydraulic cylinder to contract.

[0008] Preferably, the pedal assembly comprises a pedal body and a pedal connecting rod, wherein: the pedal body is connected to the pedal connecting rod; the pedal connecting rod is hingedly arranged on the frame, and the end of the pedal connecting rod away from the pedal body is hingedly connected to the transmission rod.

[0009] Preferably, the pedal assembly includes a return spring, wherein: both ends of the return spring are respectively connected to the pedal connecting rod and the frame; when the pedal assembly is stepped on, the pedal connecting rod drives the return spring to move and causes the return spring to deform.

[0010] Preferably, a guide groove is provided at the telescopic end of the hydraulic cylinder, and the trigger member is movably disposed in the guide groove.

[0011] Preferably, the linkage mechanism comprises a linkage rod and a linkage pin, wherein: the input end of the linkage rod is hingedly connected to the telescopic end of the hydraulic cylinder through the linkage pin, and the clutch main fork is rotatably connected to the linkage pin.

[0012] Preferably, the linkage mechanism comprises a linkage cable, wherein: a connecting end of the linkage cable is connected to an output end of the linkage rod, and a traction end of the linkage cable is connected to the clutch auxiliary fork.

[0013] Preferably, the hydraulic system of the main and auxiliary clutches further comprises an oil tank, an oil pump and a diverter valve, and the oil tank, the oil pump, the diverter valve and the hydraulic cylinder are sequentially connected to form a hydraulic circulation loop.

[0014] Preferably, the oil tank is configured as a multi-filter oil tank, and the multi-filter oil tank comprises a box body and a filter element, wherein: the box body is provided with an oil filling port; the number of the filter elements is set to be multiple, all the filter elements are fixedly arranged in the box body, and the oil discharge end of the filter element is connected to an oil discharge pipe, and the oil discharge pipe passes through the box wall of the box body.

[0015] Preferably, the filter element comprises a filter element body, a first end cover and a second end cover, wherein: the filter element body is configured to be cylindrical; the first end cover and the second end cover are respectively arranged at two ends of the filter element body, and the second end cover is provided with an oil drain port.

[0016] The utility model provides a main and auxiliary clutch hydraulic system which has at least the following beneficial effects:

[0017] The hydraulic system of the main and auxiliary clutch includes a hydraulic cylinder, a pedal trigger mechanism, a linkage mechanism, a clutch main fork and a clutch auxiliary fork. The hydraulic cylinder is provided with a cylinder switch for starting the contraction of the hydraulic cylinder; the pedal trigger mechanism is arranged on the frame for triggering the cylinder switch, and the telescopic end of the hydraulic cylinder is connected to the clutch main fork and the clutch auxiliary fork through a linkage mechanism. When the hydraulic cylinder contracts, the linkage mechanism can effectively transmit the contraction power of the hydraulic cylinder to the clutch main fork and the clutch auxiliary fork, thereby driving the clutch to move.

[0018] The utility model only needs to lightly step on the pedal trigger mechanism to trigger the oil cylinder switch to start, so that the hydraulic cylinder can shrink and move, and then drive the clutch main fork and the clutch auxiliary fork to move through the linkage mechanism, thereby realizing the clutch action. Not only does it make the operation more labor-saving while ensuring the clutch action effect, but it also adopts the method of inward contraction to provide power, which can save space, facilitate structural layout, and improve space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the main fork linkage part of the clutch of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the clutch fork linkage part of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the hydraulic system of the main and auxiliary clutch of the utility model;

[0023] Figure 4 It is a schematic diagram of the main view of the hydraulic cylinder of the utility model;

[0024] Figure 5 It is a top view schematic diagram of the hydraulic cylinder of the utility model;

[0025] Figure 6 It is a cross-sectional schematic diagram of the hydraulic cylinder of the utility model;

[0026] Figure 7 It is a schematic diagram of a hydraulic oil circuit of a hydraulic system of the utility model.

[0027] Figure 8 It is a structural schematic diagram of the oil tank of the utility model;

[0028] Fig. 9 It is a top view schematic diagram of the fuel tank of the utility model;

[0029] Fig.10 It is a schematic cross-sectional view of the utility model aa;

[0030] Fig.11 This is a schematic diagram of the filter element structure of the utility model

[0031] Reference numerals

[0032] 1. Hydraulic cylinder; 11. Cylinder switch; 111. Switch body; 112. Second return spring; 12. Piston rod; 121. Annular connecting cavity; 122. First connecting hole; 123. Second connecting hole; 124. Guide groove; 13. Cylinder body; 131. Oil inlet; 132. Oil outlet; 14. First return spring; 2. Pedal trigger mechanism; 21. Pedal assembly; 211. Pedal body; 212. Pedal connecting rod; 213. Return spring ; 22. Transmission rod; 23. Trigger; 3. Linkage mechanism; 31. Linkage rod; 32. Linkage pin; 33. Linkage cable; 4. Clutch main fork; 5. Clutch auxiliary fork; 6. Oil tank; 61. Box body; 611. Oil filling port; 612. Oil return pipe; 613. Oil drain pipe; 62. Filter element; 621. Filter element body; 622. First end cover; 623. Second end cover; 624. Connecting nut; 63. Oil cap; 7. Oil pump; 8. Diverter valve. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0034] The utility model provides a hydraulic system of main and auxiliary clutches, such as Figures 1 to 11 As shown, the hydraulic system of the main and auxiliary clutches includes a hydraulic cylinder 1, a pedal trigger mechanism 2, a linkage mechanism 3, a clutch main fork 4 and a clutch auxiliary fork 5.

[0035] The hydraulic cylinder 1 is provided with a cylinder switch 11, which is used to start the contraction action of the hydraulic cylinder 1; the pedal trigger mechanism 2 is arranged on the frame of the tractor, and the cylinder switch 11 is triggered by pedaling; the telescopic end of the hydraulic cylinder 1 is connected with the clutch main fork 4 and the clutch auxiliary fork 5 through the linkage mechanism 3, and can drive the clutch main fork 4 and the clutch auxiliary fork 5 to move.

[0036] The utility model is mainly suitable for tractors.

[0037] When in use, the driver steps on the pedal trigger mechanism 2, and the pedal trigger mechanism 2 is actuated to drive the cylinder switch 11 to open. At this time, the telescopic end of the hydraulic cylinder 1 contracts, and the clutch main fork 4 and the clutch auxiliary fork 5 are driven to move through the linkage mechanism 3, thereby realizing the action of the clutch.

[0038] The utility model cooperates with each other through the hydraulic cylinder 1 provided with the cylinder switch 11, the pedal trigger mechanism 2 and the linkage mechanism 3, and the action of the clutch main fork 4 and the clutch auxiliary fork 5 can be realized only by stepping on the pedal action, so that the operation is more labor-saving while ensuring the clutch action effect.

[0039] As an optional implementation, the pedal trigger mechanism 2 includes a pedal assembly 21 , a transmission rod 22 and a trigger member 23 .

[0040] The pedal assembly 21 is hingedly arranged on the vehicle frame, and the pedal assembly 21 forms a lever mechanism. The pedal assembly 21 is connected to the trigger member 23 through a transmission rod 22 .

[0041] When in use, the driver steps on the pedal assembly 21, and the transmission rod 22 can drive the trigger member 23 to move to a position close to the cylinder switch 11, and contact the cylinder switch 11 to activate it. At this time, the hydraulic cylinder 1 performs a contraction action.

[0042] The contraction power is used as the driving power for the clutch action. On the basis of ensuring sufficient power, the inward contraction method can save space and facilitate structural layout.

[0043] As an optional implementation, the pedal assembly 21 includes a pedal body 211 and a pedal connecting rod 212 .

[0044] The pedal body 211 is connected to the pedal connecting rod 212 and is integrally arranged. The pedal connecting rod 212 is hinged on the frame. The two side sections of the pedal connecting rod 212 at the hinge position with the frame are respectively the first connecting rod section and the second connecting rod section. The first connecting rod section and the second connecting rod section are arranged at an angle. The first connecting rod section is connected to the pedal body 211, and the second connecting rod section is hingedly connected to the transmission rod 22. The length of the first connecting rod section is greater than the length of the second connecting rod section. In this way, while ensuring the power transmission effect, pedaling is made more labor-saving.

[0045] As an optional implementation, the pedal assembly 21 includes a return spring 213, and both ends of the return spring 213 are respectively connected to the pedal connecting rod 212 and the frame.

[0046] When the pedal assembly 21 is stepped on, the pedal connecting rod 212 drives the return spring 213 to move, and the return spring 213 is stretched and deformed. When the pedaling force is eliminated, the return spring 213 in the stretched state drives the pedal assembly 21 to move in the opposite direction, so that it returns to its initial position.

[0047] As an optional implementation, a guide groove 124 is provided through the telescopic end of the hydraulic cylinder 1 , and the trigger member 23 is movably disposed in the guide groove 124 .

[0048] The hydraulic cylinder 1 includes a cylinder body 13, a piston rod 12 and a first return spring 14. A piston cavity is provided in the cylinder body 13. The piston rod 12 is movably inserted in the piston cavity. The piston rod 12 is connected to the clutch main fork 4 and the clutch auxiliary fork 5 through the linkage mechanism 3. The guide groove 124 is provided on the piston rod 12. The first return spring 14 is provided in the piston cavity, and its two ends are respectively against the piston rod 12 and the inner wall of the cylinder body 13. An oil inlet 131 and an oil outlet 132 are provided on the cylinder body 13 in communication with the piston cavity. An annular communicating cavity 121 is provided on the outer peripheral wall of the piston rod 12. The annular communicating cavity 121 is connected to the oil inlet 131. A switch cavity is provided inside the piston rod 12. A first communicating hole 122 communicating with the switch cavity and the annular communicating cavity 121 is provided on the piston rod 12. A second communicating hole 123 communicating with the switch cavity and the piston cavity is provided on the piston rod 12. The second communicating hole 123 is located at the end of the piston rod 12.

[0049] The oil cylinder switch 11 comprises a switch body 111 and a second return spring 112 . The switch body 111 is movably inserted in the switch cavity. The second return spring 112 is arranged in the switch cavity, and two ends thereof are respectively against the switch body 111 and the inner wall of the switch cavity.

[0050] When the pedal trigger mechanism 2 is in the initial position, the hydraulic oil enters the switch cavity through the oil inlet 131 , the annular connecting cavity 121 and the first connecting hole 122 in sequence, then enters the piston cavity through the second connecting hole 123 , and is finally discharged through the oil outlet 132 .

[0051] When the pedal trigger mechanism 2 is stepped on, the trigger member 23 moves, contacts and pushes the switch body 111 to shrink into the switch cavity, the second return spring 112 is compressed and deformed, and the outer wall of the switch body 111 blocks the first connecting hole 122. At this time, as the hydraulic oil is discharged through the oil outlet 132, the piston rod 12 shrinks into the piston cavity, driving the linkage mechanism 3 to operate, thereby driving the clutch master fork 4 and the clutch master fork 4 to operate.

[0052] In this way, only a small pedal force is required to realize the clutch action, which saves effort in operation.

[0053] As an optional embodiment, the hydraulic cylinder 1 also includes a dust cover, which is mounted on the piston rod 12 and has two ends connected to the telescopic end of the piston rod 12 and the cylinder body 13 respectively. The dust cover has a dust-proof effect without affecting the contraction action of the piston rod 12.

[0054] As an optional implementation, the linkage mechanism 3 includes a linkage rod 31 and a linkage pin 32 .

[0055] The input end of the linkage rod 31 is hingedly connected to the telescopic end of the piston rod 12 of the hydraulic cylinder 1 through the linkage pin 32, and the clutch master fork 4 is rotatably connected to the linkage pin 32. In this way, the piston rod 12 and the clutch master fork 4 form a lever mechanism. When the piston rod 12 is telescopic, the clutch master fork 4 swings.

[0056] As an optional implementation, the linkage mechanism 3 includes a linkage cable 33 , a connecting end of the linkage cable 33 is connected to the output end of the linkage rod 31 , and a traction end of the linkage cable 33 is connected to the clutch auxiliary fork 5 .

[0057] Since the clutch fork 5 and the clutch fork 4 are respectively located on both sides of the clutch housing, the clutch fork 5 is linked by a cable, which is not affected by the scene and can stably transmit power, thereby ensuring the action effect of the clutch fork 5.

[0058] As an optional embodiment, the hydraulic system of the main and auxiliary clutches further includes an oil tank 6, an oil pump 7 and a diverter valve 8. The oil tank 6, the oil pump 7, the diverter valve 8 and the hydraulic cylinder 1 are connected in sequence to form a hydraulic circulation loop.

[0059] As an optional implementation, the oil tank 6 is configured as a multi-filter oil tank, and the multi-filter oil tank includes a tank body 61 and a filter element 62 .

[0060] An oil filling port 611 is provided on the top of the box body 61, and an oil cap 63 is threadedly connected to the oil filling port 611; the number of filter elements 62 is set to be multiple, all filter elements 62 are fixedly set in the box body, all filter elements 62 are arranged in parallel, and the oil outlet end of the filter element 62 is connected to an oil drain pipe 613, and the oil drain pipe 613 passes through the box wall of the box body 61.

[0061] An oil return pipe 612 is connected to the box wall of the box body 61 . The height of the oil return pipe 612 is greater than the height of the oil drain pipe 613 . The number of the oil return pipe 612 , the oil drain pipe 613 and the filter element 62 is the same.

[0062] A multi-filter oil tank is used. On the one hand, the filter element 62 can effectively filter impurities in the oil. On the other hand, the oil tank adopts a built-in filter element structure, without the need for an external filter, which can effectively reduce the equipment failure rate. At the same time, multiple independent and parallel filter elements 62 cooperate with each other. When a single filter element 62 fails, the remaining filter elements 62 still work normally, without affecting the normal operation of the entire hydraulic system, thereby improving system stability.

[0063] As an optional implementation, the filter element 62 includes a filter element body 621 , a first end cover 622 and a second end cover 623 .

[0064] The filter element body 621 is horizontally arranged, and its shape is arranged to be cylindrical, and a filter screen is arranged on the peripheral wall.

[0065] The first end cover 622 and the second end cover 623 are respectively disposed at two ends of the filter element body 621 , and the second end cover 623 is provided with an oil discharge port.

[0066] When the hydraulic system is running, the oil enters the filter element body 621 through the filter, and impurities are retained on the outside of the filter, and then the oil flows out through the oil drain port.

[0067] The second end cover 623 is provided with a connecting nut 624 , and the inlet end of the oil drain pipe 613 is provided with an external thread that threads with the connecting nut 624 . The second end cover 623 is threadedly connected to the inlet end of the oil drain pipe 613 through the connecting nut 624 .

[0068] The threaded connection structure is adopted, which ensures firm connection and convenient assembly and disassembly.

[0069] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A hydraulic system with a main clutch and a secondary clutch, characterized in that: It includes a hydraulic cylinder, a pedal trigger mechanism, a linkage mechanism, a clutch main fork and a clutch auxiliary fork, wherein: The hydraulic cylinder is provided with a cylinder switch for starting the hydraulic cylinder contraction action; The pedal trigger mechanism is used to trigger the cylinder switch; The telescopic end of the hydraulic cylinder is connected to the clutch main fork and the clutch auxiliary fork through a linkage mechanism, and can drive the clutch main fork and the clutch auxiliary fork to move.

2. The hydraulic system of the main and auxiliary clutch according to claim 1, characterized in that: The pedal trigger mechanism comprises a pedal assembly, a transmission rod and a trigger member, wherein: The pedal assembly is hingedly arranged on the vehicle frame, and the pedal assembly is connected to the trigger member through the transmission rod; By stepping on the pedal assembly, the transmission rod can drive the trigger member to move, and the trigger member can trigger the cylinder switch to cause the hydraulic cylinder to contract.

3. The hydraulic system of the main and auxiliary clutch according to claim 2, characterized in that: The pedal assembly comprises a pedal body and a pedal connecting rod, wherein: The pedal body is connected to the pedal connecting rod; The pedal connecting rod is hingedly arranged on the vehicle frame, and the end of the pedal connecting rod away from the pedal body is hingedly connected to the transmission rod.

4. The hydraulic system of the main and auxiliary clutch according to claim 3, characterized in that: The pedal assembly includes a return spring, wherein: The two ends of the return spring are respectively connected to the pedal connecting rod and the frame; When the pedal assembly is stepped on, the pedal connecting rod drives the return spring to move and causes the return spring to deform.

5. The hydraulic system of the main and auxiliary clutch according to claim 2, characterized in that: The telescopic end of the hydraulic cylinder is provided with a guide groove, and the triggering member is movably arranged in the guide groove.

6. The main clutch and auxiliary clutch hydraulic system according to claim 1, characterized in that: The linkage mechanism comprises a linkage rod and a linkage pin, wherein: The input end of the linkage rod is hingedly connected to the telescopic end of the hydraulic cylinder through the linkage pin, and the clutch main fork is rotatably connected to the linkage pin.

7. The hydraulic system of the main and auxiliary clutch according to claim 6, characterized in that: The linkage mechanism comprises a linkage cable, wherein: The connecting end of the linkage cable is connected to the output end of the linkage rod, and the traction end of the linkage cable is connected to the clutch auxiliary fork.

8. The main clutch and auxiliary clutch hydraulic system according to claim 1, characterized in that: The hydraulic system of the main and auxiliary clutches also includes an oil tank, an oil pump and a diverter valve. The oil tank, the oil pump, the diverter valve and the hydraulic cylinder are connected in sequence to form a hydraulic circulation loop.

9. The hydraulic system of the main clutch and auxiliary clutch according to claim 8, characterized in that: The oil tank is configured as a multi-filter oil tank, and the multi-filter oil tank comprises a tank body and a filter element, wherein: The box body is provided with an oil filling port; The number of the filter elements is set to be multiple, all of the filter elements are fixedly arranged in the box body, the oil discharge end of the filter element is connected to an oil discharge pipe, and the oil discharge pipe passes through the box wall of the box body.

10. The hydraulic system of the main clutch and auxiliary clutch according to claim 9, characterized in that: The filter element comprises a filter element body, a first end cover and a second end cover, wherein: The filter element body is configured in a cylindrical shape; The first end cover and the second end cover are respectively arranged at two ends of the filter element body, and the second end cover is provided with an oil drain port.

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