A semi-split lifter

Abstract

The utility model discloses a kind of semi-disposed hoist, belong to tractor hoist technical field, including shell, hoist arm for connecting farm implement is installed on shell, multi-way valve is also provided on shell, multi-way valve is communicated with the oil cavity of hoist cylinder by oil pipe, the power output end of hoist cylinder is connected with hoist arm, flow regulating rod is set on multi-way valve, hoist also includes connecting rod mechanism, one end of connecting rod mechanism is connected with hoist arm, other end is connected with paddle, hoist arm action, paddle promotes flow regulating rod action, when farm implement is restricted by farmland condition and makes hoist arm angle not satisfy preset position, the flow regulating rod of multi-way valve can be promptly promoted by the cooperation of connecting rod mechanism and paddle, increase or reduce the flow of hoist cylinder, to make hoist arm correspondingly lower or rise, ensure that farmland depth is consistent, modular design is simultaneously used, convenient to disassemble and replace, without overall disassembly when maintaining and overhauling, maintenance cost and time are reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of tractor lifting devices, specifically relating to a semi-split lifting device. Background Technology

[0002] Tractor lifters are primarily used in the rear lifting system of tractors. Existing lifters generally use external hydraulic cylinders to drive the raising and lowering of the lifting arm. The cylinder's operation is controlled by a controller that uses solenoid valves to control the hydraulic circuit. During tractor operation, the lifting arm angle may be too large or too small due to the limitations of the tilled land conditions. To ensure consistent tillage depth, an angle sensor is needed to detect the lifting arm height in real time, and then the controller drives the hydraulic cylinder to adjust it. This response speed is relatively slow. Furthermore, this type of lifter requires complete disassembly for maintenance and repair, resulting in high maintenance costs and time. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a semi-split lifting device that can adjust the angle of the lifting arm in a timely manner during the tillage process to ensure consistent tillage depth, in order to address the shortcomings of the existing technology.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A semi-split type lifting device includes a housing, on which a lifting arm for connecting agricultural implements is mounted. The housing also includes a multi-way valve, which is connected to the oil chamber of a lifting cylinder via an oil pipe. The power output end of the lifting cylinder is connected to the lifting arm. A flow regulating rod is provided on the multi-way valve. The lifting device further includes a linkage mechanism, one end of which is connected to the lifting arm's rotating shaft, and the other end is connected to a lever. When the lifting arm moves, the linkage mechanism moves with the shaft, causing the lever to push the flow regulating rod.

[0006] Furthermore, a return spring is fitted onto the flow regulating rod.

[0007] Furthermore, the linkage mechanism includes a first link and a support shaft. One end of the first link is connected to the lifting arm in a transmission manner, and the other end is connected to one end of the support shaft. The support shaft is rotatably mounted on the housing, and the other end of the support shaft is connected to the lever.

[0008] Furthermore, a lifting shaft is rotatably mounted on the housing, the lifting arm is fixedly connected to the lifting shaft, and one end of the first connecting rod is connected to the lifting shaft.

[0009] Furthermore, the housing is rotatably mounted with a support connected to the agricultural implement, and the linkage mechanism also includes a second link, one end of which is connected to the support and the other end of which is connected to one end of the support shaft.

[0010] Furthermore, the support shaft includes an inner shaft and an outer tube fitted together, the rotation of the inner shaft and the outer tube do not interfere with each other, the first connecting rod is connected to one end of the outer tube, and the second connecting rod is connected to one end of the inner shaft.

[0011] Furthermore, the paddle includes a first paddle and a second paddle, the first paddle being fixedly connected to the other end of the outer tube, and the second paddle being fixedly connected to the other end of the inner shaft.

[0012] Furthermore, the lifting cylinder includes a built-in cylinder disposed inside the housing, and the power output end of the built-in cylinder is connected to the lifting shaft on the housing via an output connecting rod.

[0013] Furthermore, the lifting cylinder also includes an external cylinder, and the middle part of the lifting arm has a reserved interface for connecting to the power output end of the external cylinder.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are:

[0015] In the semi-split type lifting device disclosed in this utility model, when the lifting arm angle, i.e. the lifting height, does not meet the preset position due to the limitations of the cultivated land conditions, the flow regulating rod of the multi-way valve can be pushed in time through the cooperation of the linkage mechanism and the paddle to increase or decrease the flow of the lifting cylinder, thereby causing the lifting arm to descend or rise accordingly, ensuring consistent cultivated land depth.

[0016] In this invention, the lifting arm is powered by the cooperation of an internal and external hydraulic cylinder. The power is sufficient, and both the internal and external hydraulic cylinders are controlled by a multi-way valve to supply oil, which can adapt to the power needs of different models and types of agricultural implements, thus improving the versatility and practicality of the tractor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the semi-split lifting device of this utility model from one direction;

[0018] Figure 2 This is a side view of the semi-split lifting device of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the semi-split lifting device of this utility model from another direction;

[0020] Figure 4 yes Figure 3 A sectional view;

[0021] Figure 5 This is a schematic diagram showing the interaction between the linkage mechanism and the lever.

[0022] In the diagram, 1-housing, 11-lifting shaft, 12-lifting arm, 13-support, 14-connecting rod, 15-built-in cylinder, 16-output link, 17-reserved interface, 2-linkage mechanism, 21-first link, 22-second link, 23-outer tube, 24-inner shaft, 25-first paddle, 26-second paddle, 27-hinge, 3-multi-way valve, 31-flow regulating rod, 32-reset spring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0024] like Figure 1 and Figure 3 As shown, a semi-split type lifting device includes a housing 1, on which a lifting arm 12 for connecting agricultural implements is mounted. A multi-way valve 3 is also provided on the housing 1. The multi-way valve 3 is connected to the oil chamber of a lifting cylinder via an oil pipe. The power output end of the lifting cylinder is connected to the rotating shaft of the lifting arm 12. That is, the multi-way valve 3 controls the flow rate of the oil pipe, and the movement of the lifting cylinder causes the lifting arm 12 to rise or fall.

[0025] like Figure 4 and Figure 5 As shown, the multi-way valve 3 is equipped with a flow regulating rod 31, and the lifter also includes a linkage mechanism 2. One end of the linkage mechanism 2 is connected to the lifting arm 12, and the other end is connected to a paddle (25, 26). When the lifting arm 12 moves, the linkage mechanism 2 moves with the shaft, thereby driving the paddle (25, 26) to push the flow regulating rod 31 to move.

[0026] Therefore, when the lifting angle of the lifting arm 12 does not meet the set requirements due to the limitations of the farm implement on the cultivated land, the linkage mechanism 2 moves with the lifting arm 12, controlling the lifting cylinder through the paddles (25, 26), thereby restoring the lifting arm 12 to the set position. The linkage mechanism 2, in conjunction with the paddles (25, 26), plays a feedback adjustment role. If the angle of the lifting arm 12 is too large, i.e., the lifting arm 12 is raised too high, the linkage mechanism 2 drives the paddles (25, 26) to move, pushing the flow regulating rod 31 of the multi-way valve 3 to extend or compress, increasing or decreasing the flow of the lifting cylinder, causing the lifting arm 12 to descend accordingly. When the angle of the lifting arm 12 is too small, i.e., the lifting arm 12 is raised too low, the linkage mechanism 2 drives the paddles (25, 26) to move in the opposite direction, pushing the flow regulating rod 31 of the multi-way valve 3 to compress or extend, decreasing or increasing the flow of the lifting cylinder, causing the lifting arm 12 to rise accordingly, thereby ensuring consistent tillage depth.

[0027] To enable the flow regulating rod 31 to extend or compress along with the paddles (25, 26), a return spring 32 is fitted onto the flow regulating rod 31. The return spring 32 applies force to the flow regulating rod 31, allowing it to exert a certain force on the paddles (25, 26) and move with them. This, in turn, controls the flow rate of the multi-way valve 3, thereby adjusting the angle of the lifting arm 12 in real time. In this application, the linkage mechanism 2, the paddles (25, 26), and the flow regulating rod 31 of the multi-way valve 3 are all located inside the housing 1.

[0028] like Figure 2 and Figure 5 As shown, the linkage mechanism 2 includes a first link 21 and a support shaft. One end of the first link 21 is connected to the lifting arm 12 via a transmission, and the other end is connected to one end of the support shaft. The support shaft is rotatably mounted on the housing 1, and the other end of the support shaft is connected to a lever (25, 26). A lifting shaft 11 is rotatably mounted on the housing 1, and the lifting arm 12 is fixedly connected to the lifting shaft 11. One end of the first link 21 is connected to the lifting shaft 11. Therefore, the first feedback adjustment of the linkage mechanism 2 is as follows: when the angle of the lifting arm 12 is too large, the angle of the lifting arm 12 is transmitted to the first link 21 through the lifting shaft 11. The first link 21 transmits the action to the lever (25, 26) through the support shaft. The lever (25, 26) pushes the flow regulating rod 31 to move, which in turn feeds back to the lifting cylinder. The lifting cylinder drives the lifting arm 12 to descend.

[0029] Furthermore, the housing 1 is also rotatably mounted with a support 13 connected to the implement. The linkage mechanism 2 also includes a second link 22, one end of which is connected to the support 13 via a connecting rod 14, and the other end is connected to one end of the support shaft. Therefore, the second feedback adjustment of the linkage mechanism 2 is that when the angle of the lifting arm 12 is too small, the support 13 rotates due to the influence of the implement. The movement of the support 13 is transmitted to the second link 22, which transmits the movement to the paddles (25, 26) via the support shaft. The paddles (25, 26) push the flow regulating rod 31 to perform the opposite movement, which in turn feeds back to the lifting cylinder, causing the lifting arm 12 to rise.

[0030] The aforementioned linkage structure also includes multiple hinges 27. The first link 21 is connected to the lifting shaft 11 and the support shaft, and the second link 22 is connected to the connecting rod 14 and the support shaft through hinges 27. The hinges 27 may have the same or different structures and are all used to realize the mutual conversion between movement and rotation.

[0031] like Figure 5 As shown, to achieve the above two feedback adjustments, the support shaft specifically includes an inner shaft 24 and an outer tube 23 fitted together. The inner shaft 24 and the outer tube 23 are coaxially arranged but their rotations do not interfere with each other. The first connecting rod 21 is connected to one end of the outer tube 23, and the second connecting rod 22 is connected to one end of the inner shaft 24. That is, the outer tube 23 will rotate with the movement of the first connecting rod 21, and the inner shaft 24 will rotate with the movement of the second connecting rod 22. The paddles (25, 26) include a first paddle 25 and a second paddle 26. The first paddle 25 is fixedly connected to the other end of the outer tube 23, and the second paddle 26 is fixedly connected to the other end of the inner shaft 24.

[0032] Therefore, when the angle of the lifting arm 12 is too large, the first connecting rod 21 transmits the action to the first deflector 25 through the outer tube 23, thereby pushing the flow regulating rod 31 to move; when the angle of the lifting arm 12 is too small, the second connecting rod 22 transmits the action to the second deflector 26 through the inner shaft 24, pushing the flow regulating rod 31 to perform the opposite action.

[0033] like Figures 1 to 5 The lifting cylinder includes a built-in cylinder 15 housed inside the housing 1, with its power output end connected to the lifting shaft 11 on the housing 1 via an output connecting rod 16. The lifting cylinder also includes an external cylinder (not shown in the figure), with a reserved interface 17 at the middle of the lifting arm 12 for connecting to the power output end of the external cylinder. When assembling the lifting device with the tractor, the lifting device housing 1 and the external cylinder can be installed onto the vehicle body first, and then the external cylinder can be connected to the reserved interface 17.

[0034] Both the built-in hydraulic cylinder 15 and the external hydraulic cylinder are connected to the multi-way valve 3 via oil pipes. Therefore, the built-in hydraulic cylinder 15 and the external hydraulic cylinder are simultaneously controlled by the multi-way valve 3, causing the lifting arm 12 to descend or rise, which can adapt to the power needs of different models and types of agricultural implements during cultivation.

[0035] This utility model's semi-split lifting device, through the setting of a linkage mechanism and a lever, can, when the angle of the lifting arm is too large or too small, push the flow regulating rod of the multi-way valve to increase or decrease the flow of the lifting cylinder, thereby causing the lifting arm to rise or fall accordingly, thus ensuring consistent tillage depth. At the same time, this application adopts a modular design. Except for the external cylinder, all other components are installed on the surface or inside the housing, which is convenient for disassembly and replacement. During maintenance and repair, only the damaged or faulty modules need to be repaired or replaced, without the need for overall disassembly, reducing maintenance costs and time.

[0036] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0037] In the description of this specification, unless otherwise expressly defined, the terms "setup", "installation", "connection", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0038] While specific embodiments of this utility model have been described above, those skilled in the art should understand that the described embodiments are merely some, not all, embodiments of this utility model. These are merely illustrative examples, and the scope of protection of this utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model and without any inventive effort, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A semi-split type lifting device, comprising a housing, a lifting arm for connecting agricultural implements mounted on the housing, a multi-way valve further provided on the housing, the multi-way valve being connected to the oil chamber of a lifting cylinder via an oil pipe, the power output end of the lifting cylinder being connected to the lifting arm, characterized in that, The multi-way valve is equipped with a flow regulating rod, and the lifter also includes a linkage mechanism. One end of the linkage mechanism is connected to the lifting arm shaft, and the other end is connected to a lever. When the lifting arm moves, the linkage mechanism moves with the shaft, causing the lever to push the flow regulating rod to move.

2. The semi-split type lifting device according to claim 1, characterized in that, A return spring is fitted onto the flow regulating rod.

3. The semi-split type lifting device according to claim 1, characterized in that, The linkage mechanism includes a first link and a support shaft. One end of the first link is connected to the lifting arm and the other end is connected to one end of the support shaft. The support shaft is rotatably mounted on the housing, and the other end of the support shaft is connected to the lever.

4. The semi-split type lifting device according to claim 3, characterized in that, A lifting shaft is rotatably mounted on the housing, the lifting arm is fixedly connected to the lifting shaft, and one end of the first connecting rod is connected to the lifting shaft.

5. The semi-split type lifting device according to claim 4, characterized in that, The housing is also rotatably mounted with a support connected to the agricultural implement, and the linkage mechanism further includes a second link, one end of which is connected to the support and the other end of which is connected to one end of the support shaft.

6. The semi-split type lifting device according to claim 5, characterized in that, The support shaft includes an inner shaft and an outer tube fitted together. The rotation of the inner shaft and the outer tube do not interfere with each other. The first connecting rod is connected to one end of the outer tube, and the second connecting rod is connected to one end of the inner shaft.

7. The semi-split type lifting device according to claim 6, characterized in that, The paddle includes a first paddle and a second paddle, the first paddle being fixedly connected to the other end of the outer tube, and the second paddle being fixedly connected to the other end of the inner shaft.

8. The semi-split lifting device according to any one of claims 1 to 7, characterized in that, The lifting cylinder includes a built-in cylinder disposed inside the housing, and the power output end of the built-in cylinder is connected to the lifting shaft on the housing through an output connecting rod.

9. The semi-split type lifting device according to claim 8, characterized in that, The lifting cylinder also includes an external cylinder, and the middle part of the lifting arm has a reserved interface for connecting to the power output end of the external cylinder.

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