A machine tool adjustment device for a three-point suspension mechanism

Abstract

The present invention relates to the technical field of agricultural machinery, and in particular to an implement adjustment device of a three-point suspension mechanism, comprising an implement hydraulic system and a vehicle body for towing the implement, the hydraulic system comprising a lifting cylinder, an oil inlet pipeline of the hydraulic system and the lifting cylinder being connected via a reversing valve, a piston rod of the lifting cylinder being connected to the implement, a handle of the reversing valve being connected to a driving mechanism for driving the same, the content of this patent realizes servo control of tractor implements, realizes the correspondence between the position of the control handle and the height position of the tractor implements, the position where the handle operating rod is placed corresponds to the height position of the implement, there is no need to manually supervise the implement position during the adjustment process, and the efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to a machine adjustment device of a three-point suspension mechanism. Background Art

[0002] As the country implements agricultural machinery modernization, users have higher and higher requirements for agricultural machinery, and farmers have higher and higher requirements for the operating comfort of tractors. The height of agricultural machinery is controlled by a handle, and the operator needs to visually adjust the height of the agricultural machinery through the handle to prevent the machine from staying too high or too low to affect the operation or transportation, but this adjustment method is inefficient. Summary of the invention

[0003] In order to solve the problem of low efficiency of manual visual adjustment of tools in the prior art, the present invention provides a tool adjustment device of a three-point suspension mechanism with high efficiency.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A tool adjustment device for a three-point suspension mechanism comprises a tool hydraulic system and a vehicle body for towing the tool, wherein the hydraulic system comprises a lifting cylinder, an oil inlet pipeline of the hydraulic system and the lifting cylinder are connected via a reversing valve, a piston rod of the lifting cylinder is connected to the tool, and a handle of the reversing valve is connected to a driving mechanism for driving the reversing valve to move.

[0006] Furthermore, the first end of the machine is rotatably connected to an upper pull rod, the second end of the machine is rotatably connected to a lower pull rod, both the upper pull rod and the lower pull rod are rotatably connected to the vehicle body, the lower pull rod is rotatably connected to a lifting rod, the other end of the lifting rod is rotatably connected to a rocker arm, the other end of the rocker arm is rotatably connected to the vehicle body, and the piston rod of the lifting cylinder is rotatably connected to the rocker arm.

[0007] Furthermore, the driving mechanism includes a control operating rod rotatably connected to the vehicle body, a first sliding sleeve is fixed to one end of the control operating rod, a control connecting rod is slidably connected in the first sliding sleeve, an action slider is rotatably connected to the handle of the reversing valve, a second sliding sleeve is fixed to the action slider, the control connecting rod is slidably connected to the second sliding sleeve, and the control connecting rod is connected to a reset mechanism for driving the control connecting rod to reset.

[0008] The reset mechanism includes a mounting rod rotatably connected to the end of the control rod away from the control operating rod, and the end of the mounting rod away from the control rod is fixed to the rocker. The mounting rod drives the handle of the reversing valve to return to its original position, thus forming a closed-loop system, and no additional control force is required to return the handle of the reversing valve.

[0009] Furthermore, the reversing valve is a three-position six-way valve, and the reversing valve includes port A, port B, port C, port D, port E and port F. Port B and port D are connected to the return oil pipeline of the hydraulic system, port C is connected to the rodless chamber of the lifting cylinder, and port E and port F are connected to the oil inlet pipeline of the hydraulic system. When the reversing valve is in the middle position, port A, port C, port D and port F are closed, and port B and port E are connected; when the reversing valve is in the left position, port B and port E are closed, port A is connected to port D, and port C is connected to port F; when the reversing valve is in the right position, port B and port E are closed, port A is connected to port F, and port C is connected to port D.

[0010] Furthermore, a pump and an oil suction filter are provided on the oil inlet pipeline of the hydraulic system.

[0011] Beneficial effects:

[0012] (1) The content of this patent realizes the servo control of the tractor implement, realizes the correspondence between the position of the control handle and the height position of the tractor implement, and the position of the handle operating lever corresponds to the height position of the implement. There is no need to manually supervise the position of the implement during the adjustment process, which is highly efficient;

[0013] (2) The three-point suspension system is a commonly used suspension system for tractors and is a standard configuration for tractors. Based on this, the content of this patent achieves comfort and efficiency in operation through a connecting rod structure, saves costs, and is obviously advanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 The present invention is a structural principle diagram of the tool adjustment device of the three-point suspension mechanism.

[0016] Among them, 1. oil suction filter, 2. pump, 3. reversing valve, 7. mounting connecting rod, 8. lower pull rod, 9. lifting cylinder, 10. rocker, 11. control connecting rod, 12. action slider, 13. control operating lever, 14. lifting rod, 15. upper pull rod, 16. implements. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0020] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0023] like Figure 1 A tool 16 adjustment device for a three-point suspension mechanism includes a tool 16 hydraulic system and a vehicle body for towing the tool 16. The hydraulic system includes a lifting cylinder 9. The oil inlet pipeline of the hydraulic system and the lifting cylinder 9 are connected through a reversing valve 3. The piston rod of the lifting cylinder 9 is connected to the tool 16. The handle of the reversing valve 3 is connected to a driving mechanism for driving the same.

[0024] The first end of the tool 16 is rotatably connected to the upper pull rod 15, and the second end of the tool 16 is rotatably connected to the lower pull rod 8. The upper pull rod 15 and the lower pull rod 8 are both rotatably connected to the vehicle body. The lower pull rod 8 is rotatably connected to the lifting rod 14, and the other end of the lifting rod 14 is rotatably connected to the rocker arm 10. The other end of the rocker arm 10 is rotatably connected to the vehicle body, and the piston rod of the lifting cylinder 9 is rotatably connected to the rocker arm 10.

[0025] The driving mechanism includes a control operating rod 13 rotatably connected to the vehicle body, a first sliding sleeve is fixed to one end of the control operating rod 13, a control connecting rod 11 is slidably connected in the first sliding sleeve, an action slider 12 is rotatably connected to the handle of the reversing valve 3, a second sliding sleeve is fixed to the action slider 12, the control connecting rod 11 is slidably connected to the second sliding sleeve, and the control connecting rod 11 is connected to a reset mechanism for driving it to reset.

[0026] The reset mechanism includes a mounting link 7 rotatably connected to an end of the control link 11 away from the control operating rod 13 , and an end of the mounting link 7 away from the control link 11 is fixed to the rocker 10 .

[0027] The reversing valve 3 is a three-position six-way valve. The reversing valve 3 includes port A, port B, port C, port D, port E and port F. Port B and port D are connected to the return oil pipeline of the hydraulic system, port C is connected to the rodless chamber of the lifting cylinder 9, and port E and port F are connected to the oil inlet pipeline of the hydraulic system. When the reversing valve 3 is in the middle position, port A, port C, port D and port F are closed, and port B is connected to port E; when the reversing valve 3 is in the left position, port B and port E are closed, port A is connected to port D, and port C is connected to port F; when the reversing valve 3 is in the right position, port B and port E are closed, port A is connected to port F, and port C is connected to port D.

[0028] A pump 2 and an oil suction filter 1 are provided on the oil inlet pipeline of the hydraulic system.

[0029] Working principle:

[0030] exist Figure 1 In the middle stable state, the implement 16 is stationary in a fixed position. When the control lever 13 rotates clockwise, the control lever 13 pushes the control link 11 to rotate around the a hinge axis, forcing the action slider 12 to pull the valve core of the reversing valve 3 to move to the right. The reversing valve 3 takes the left function, and the hydraulic oil of the pump 3 enters the rodless chamber of the lifting cylinder 9 through the reversing valve 3. The piston rod is pushed out, pushing the rocker 10 to move counterclockwise. At the same time, the rocker 10 is connected to the lifting rod 14, and the lifting rod 14 is connected to the lower pull rod 8. When the rocker 10 moves counterclockwise, the lifting rod 14 is connected and lifted, and the lower pull rod 8 rotates counterclockwise around the rotation point, forcing the implement 16 to move upward. As the rocker 10 rotates counterclockwise, the control lever 11 forces the action slider 12 to push the valve core of the reversing valve 3 to the left to reset, the hydraulic control stops, and the implement rises to a certain height and stops, realizing the position correspondence between the position of the control lever 13 and the position of the implement 16.

[0031] On the contrary, when the control lever 13 rotates counterclockwise, the control lever 13 pushes the control link 11 to rotate around the a hinge axis, forcing the action slider 12 to push the valve core of the reversing valve 3 to move to the left, and the reversing valve takes the right function of 3. The rodless chamber of the lifting cylinder 9 is connected to the oil tank, and the piston rod is pushed downward, pulling the rocker 10 to move in the clockwise direction. At the same time, the rocker 10 is connected to the lifting rod 14, and the lifting rod 14 is connected to the lower pull rod 8. When the rocker 10 moves in the clockwise direction, the lifting rod 14 is connected and pressed down, and the lower pull rod 8 rotates clockwise around the rotation point, forcing the machine 16 to move downward. As the rocker 10 rotates clockwise, the control link 11 forces the action slider 12 to push the valve core of the reversing valve 3 to the right to reset the hydraulic control to stop, and the machine 16 drops to a certain height and stops, realizing the position correspondence between the position of the control lever 13 and the position of the machine 16.

[0032] Here, the driving force required to drive the valve core of the reversing valve 3 is smaller than the friction force of the control operating rod 13 rotating at the position b, so that the driving can be smooth.

[0033] The position of the above-mentioned rotational connection can be set to be hinged according to needs.

[0034] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A machine tool adjustment device for a three-point suspension mechanism, characterized in that : comprising a hydraulic system for a machine (16) and a vehicle body for towing the machine (16), the hydraulic system comprising a lifting cylinder (9), the oil inlet pipeline of the hydraulic system and the lifting cylinder (9) being connected via a reversing valve (3), the piston rod of the lifting cylinder (9) being connected to the machine (16), the handle of the reversing valve (3) being connected to a driving mechanism for driving the same; the driving mechanism comprising a control operating rod (13) rotatably connected to the vehicle body, a first sliding sleeve being fixed to one end of the control operating rod (13), a control connecting rod (11) being slidably connected in the first sliding sleeve, an action sliding block (12) being rotatably connected to the handle of the reversing valve (3), a second sliding sleeve being fixed to the action sliding block (12), and the control connecting rod (11) being slidably connected to the second sliding sleeve; The first end of the tool (16) is rotatably connected to an upper pull rod (15), the second end of the tool (16) is rotatably connected to a lower pull rod (8), the upper pull rod (15) and the lower pull rod (8) are both rotatably connected to the vehicle body, the lower pull rod (8) is rotatably connected to a lifting rod (14), the other end of the lifting rod (14) is rotatably connected to a rocker (10), the other end of the rocker (10) is rotatably connected to the vehicle body, and the piston rod of the lifting cylinder (9) is rotatably connected to the rocker (10); The control connecting rod (11) is connected to a reset mechanism for driving the control connecting rod (11) to reset; The reset mechanism comprises a mounting link (7) rotatably connected to an end of the control link (11) away from the control operating rod (13), and an end of the mounting link (7) away from the control link (11) is fixed to the rocker (10); The driving force required to drive the valve core of the reversing valve (3) is smaller than the friction force of the control operating rod (13) in the rotation position.

2. The tool adjustment device of the three-point suspension mechanism according to claim 1, characterized in that: The reversing valve (3) is a three-position six-way valve. The reversing valve (3) comprises an A port, a B port, a C port, a D port, an E port and an F port. The B port and the D port are connected to the oil return line of the hydraulic system. The C port is connected to the rodless chamber of the lifting cylinder (9). The E port and the F port are connected to the oil inlet line of the hydraulic system. When the reversing valve (3) is in the middle position, the A port, the C port, the D port and the F port are closed, and the B port and the E port are connected. When the reversing valve (3) is in the left position, the B port and the E port are closed, the A port is connected to the D port, and the C port is connected to the F port. When the reversing valve (3) is in the right position, the B port and the E port are closed, the A port is connected to the F port, and the C port is connected to the D port.

3. The tool adjustment device of the three-point suspension mechanism according to claim 1, characterized in that: A pump (2) and an oil suction filter (1) are provided on the oil inlet pipeline of the hydraulic system.

Images