Shrub stumping machine with self-adaptive profiling function

Abstract

The utility model relates to a shrub stumping machine with a self-adaptive profiling function, which comprises a power head, a support frame and a hydraulic mechanism A. The front end of the support frame is provided with stumping shears, and the bottom end of the support frame is rotatably connected with a conformal land wheel; the hydraulic mechanism A comprises a hydraulic oil cylinder, a balance valve and a piston rod, the hydraulic oil cylinder is obliquely arranged, one end of the hydraulic oil cylinder is fixedly connected with the power head, the interior of the hydraulic oil cylinder is divided into an upper cavity and a lower cavity through a piston in the hydraulic oil cylinder in the gravity direction, and the cavity located above the piston is an upper oil cavity. The balance valve is connected between the two cavities of the hydraulic oil cylinder and slows down hydraulic oil flowing from the lower oil cavity to the upper oil cavity, the shape follow-up land wheel follows the terrain, the balance valve buffers lifting of the supporting frame, and the technical problem that in the traditional profiling process, automation and stability are low is solved.

Description

Technical Field

[0001] The utility model relates to the field of agricultural and forestry machinery, and more specifically to a shrub trimmer with a self-adaptive profiling function. Background Art

[0002] In the prior art, shrub trimmers mostly use springs and a planar four-bar linkage for profiling. Longitudinal profiling utilizes a combination of a four-bar linkage and a floating tension spring to allow the saw disc to float freely up and down according to the terrain conditions, that is, to perform up and down profiling.

[0003] Traditional transverse profiling uses a shaft and sleeve connection method to allow the transverse floating frame to rotate around the central axis of the fixed frame, that is, left and right profiling. This profiling method is difficult to implement, and the spring is prone to loosening after long-term use, resulting in inaccurate profiling. In addition, the existing equipment profiling relies on manual operation, which has high technical requirements for operators, and the profiling effect cannot be guaranteed.

[0004] Therefore, how to provide a new shrub trimmer that can ensure automatic profiling while also ensuring accuracy and stability is a problem that those skilled in the art need to solve urgently. Utility Model Content

[0005] In view of this, the utility model provides a shrub trimmer with an adaptive profiling function, aiming to solve the technical problems that the traditional profiling relies on manual operation, has high technical requirements for operators, and the profiling effect cannot be guaranteed.

[0006] A shrub trimmer with an adaptive profiling function, comprising:

[0007] Power head;

[0008] A support frame, a stubble shear is installed at the front end of the support frame, and a follow-up ground wheel is rotatably connected to the bottom end of the support frame;

[0009] Hydraulic mechanism A, hydraulic mechanism A includes a hydraulic cylinder a, a balancing valve a and a piston rod. The hydraulic cylinder a is arranged obliquely and its first end is tightly connected to the power head. The interior of the hydraulic cylinder a is divided into two upper and lower chambers through the piston inside it along the gravity direction. The chamber above the piston is the upper oil chamber, and the chamber below the piston is the lower oil chamber; the balancing valve a includes a valve body a, a one-way throttling valve core a and a one-way valve core a. The valve body a is provided with a one-way throttling channel a and a one-way channel a, and its corresponding two ends are connected with the upper oil chamber and the lower oil chamber through pipelines; the one-way throttling valve core a is installed in the one-way throttling channel a to control the one-way throttling channel a to flow slowly in one direction from the lower oil chamber to the upper oil chamber, and the one-way valve core a is installed in the one-way channel a to control the one-way channel a to flow in one direction from the upper oil chamber to the lower oil chamber; one end of the piston rod is fixed to the piston, and the other end passes through the second end of the hydraulic cylinder a and is hinged to the support frame to passively bear the force to realize movement with the support frame.

[0010] When the cam is in the oil pump position, the oil pump will be turned on the oil pump end, and the oil pump will be turned on the oil pump end.

[0011] Preferably, it also includes a hydraulic control system, which includes an oil storage tank and a three-position four-way valve A. The oil storage tank is provided with an oil outlet and an oil return port. The valve body of the three-position four-way valve A has four interfaces. The first interface is connected to the lower oil chamber of the hydraulic cylinder a through a pipeline, the second interface is connected to the upper oil chamber of the hydraulic cylinder a through a pipeline via a balance valve of the hydraulic mechanism A, and the third interface and the fourth interface are connected to the oil outlet and the oil return port respectively through pipelines.

[0012] Preferably, it also includes a hydraulic mechanism B, the structure of which is the same as that of the hydraulic mechanism A and the corresponding piston rods are arranged in parallel.

[0013] Preferably, it also includes a three-position four-way valve B, and the valve body of the three-position four-way valve B has four interfaces, namely interface 1, interface 2, interface 3 and interface 4, interface 1 is connected to the upper oil chamber of the hydraulic cylinder b of the hydraulic mechanism B through a pipeline; interface 2 is connected to the lower oil chamber of the hydraulic cylinder b of the hydraulic mechanism B through a balance valve b of the hydraulic mechanism B through a pipeline;

[0014] Interface three is connected to the oil outlet of the oil storage tank through an oil pipeline, and interface four is connected to the third interface through a pipeline.

[0015] Preferably, it also includes a hydraulic pump, which is installed on the oil pipeline.

[0016] Preferably, it also includes an overflow valve, which is connected in parallel to the oil pipeline.

[0017] Preferably, the support frame includes a horizontal plate connected in sequence, a vertical plate perpendicular to the horizontal plate, and an inclined plate arranged at an angle to the upper end of the vertical plate. The horizontal plate and the inclined plate are arranged on the same side of the vertical plate. The hydraulic mechanism A and the hydraulic mechanism B are arranged up and down. The piston rod of the hydraulic mechanism A is hinged to the upper end surface of the inclined plate, and the piston rod of the hydraulic mechanism B is hinged to the outer side surface of the vertical plate away from the horizontal plate.

[0018] Preferably, it also includes a servo motor, the fixed end of the servo motor is tightly connected to the support frame, and the power output end of the servo motor is drivingly connected to the power input end of the trimming shears.

[0019] Preferably, a controller is also included, and the controller is electrically connected to the hydraulic pump, the servo motor, the three-position four-way valve A and the three-position four-way valve B.

[0020] Preferably, there are two conformal ground wheels, which are symmetrically arranged on both sides of the support frame.

[0021] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a shrub trimmer with an adaptive profiling function, which has the following beneficial effects: by setting the piston rod of the hydraulic mechanism A to be hinged with the support frame, the support frame can achieve passive extension and retraction of the piston rod by the ups and downs of the contour-following ground wheels, and the contour-following ground wheels can enable the support frame to move forward during the process of following the shape up and down, thereby reducing the resistance to advancement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional schematic diagram of a shrub trimmer with an adaptive profiling function provided by the utility model;

[0023] Figure 2 A schematic diagram of the oil circuit structure of a shrub trimmer with an adaptive profiling function provided by the utility model;

[0024] Figure 3 A schematic diagram of the structure of the balancing valve a provided by the utility model;

[0025] Figure 4 A simplified structural diagram of the balancing valve b provided by the utility model;

[0026] Figure 5 A simplified structural diagram of a three-position four-way valve A provided by the utility model;

[0027] Figure 6 This is a simplified structural diagram of a three-position four-way valve B provided by the utility model.

[0028] Among them: 1-power head; 2-support frame; 3-hydraulic mechanism A; 4-hydraulic mechanism B; 6-hydraulic pump; 7-three-position four-way valve A; 8-three-position four-way valve B; 9-oil storage tank; 10-overflow valve; 11-servo motor; 21-stub shear; 22-conformable ground wheel; 23-horizontal plate; 24-vertical plate; 25-inclined plate; 31-hydraulic cylinder a; 32-balance valve a; 41-hydraulic cylinder b; 42-balance valve b; 321-valve body a; 322-one-way throttle valve core a; 323-one-way valve core a; 3211 -One-way throttling channel a; 3212-one-way channel a; 421-valve body b; 422-one-way throttling valve core b; 423-one-way valve core b; 4211-one-way throttling channel b; 4212-one-way channel b; 71-first interface; 72-second interface; 73-third interface; 74-fourth interface; 75-first gear; 76-second gear; 77-third gear; 81-interface one; 82-interface two; 83-interface three; 84-interface four; 85-gear one; 86-gear two; 87-gear three. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] See attached Figure 1-6 The utility model embodiment discloses a shrub trimmer with adaptive profiling function, comprising: a power head 1, a support frame 2 and a hydraulic mechanism A3;

[0031] A trimming shear 21 is installed at the front end of the support frame 2, and a conforming ground wheel 22 is rotatably connected to the bottom end of the support frame 2;

[0032] The hydraulic mechanism A3 includes a hydraulic cylinder a31, a balancing valve a32 and a piston rod. The hydraulic cylinder a31 is arranged obliquely and its first end is tightly connected to the power head 1. The interior of the hydraulic cylinder a31 is divided into two upper and lower chambers along the gravity direction through the piston inside it. The chamber above the piston is the upper oil chamber, and the chamber below the piston is the lower oil chamber. The balancing valve a32 includes a valve body a321, a one-way throttle valve core a322 and a one-way valve core a323. The valve body a321 is provided with a one-way throttle channel a3211 and a one-way channel a323. 212 and its corresponding two ends are connected with the upper oil chamber and the lower oil chamber through pipelines; the one-way throttling valve core a322 is installed in the one-way throttling channel a3211 to control the one-way throttling channel a3211 to flow slowly in one direction from the lower oil chamber to the upper oil chamber, and the one-way valve core a323 is installed in the one-way channel a3212 to control the one-way channel a3212 to flow in one direction from the upper oil chamber to the lower oil chamber; one end of the piston rod is fixed to the piston, and the other end passes through the second end of the hydraulic cylinder a31 and is hinged to the support frame 2 to passively bear the force to realize movement with the support frame 2.

[0033] Specifically, the one-way throttling valve core is a conventional one-way valve core structure with increased damping, that is, a spring damping structure is added to the output end of the conventional one-way valve core structure, so that the flow rate of the lower oil chamber flowing into the upper oil chamber is smaller than the flow rate of the upper oil chamber flowing into the lower oil chamber.

[0034] In some embodiments, a hydraulic control system is also included, which includes an oil storage tank 9 and a three-position four-way valve A7. The oil storage tank 9 is provided with an oil outlet and an oil return port. The valve body of the three-position four-way valve A7 has four interfaces. The first interface 71 is connected to the lower oil chamber of the hydraulic cylinder a31 through a pipeline, the second interface 72 is connected to the upper oil chamber of the hydraulic cylinder a31 through a pipeline via a balance valve of the hydraulic mechanism A3, and the third interface 73 and the fourth interface 74 are connected to the oil outlet and the oil return port respectively through pipelines.

[0035] Specifically, the three-position four-way valve A7 has three gears: a first gear 75, a second gear 76 and a third gear 77. When in the first gear 75, the first interface 71 is connected to the second interface 72, and the third interface 73 is connected to the fourth interface 74; when in the second gear 76, the first interface 71 is connected to the third interface 73, and the second interface 72 is connected to the fourth interface 74; when in the third gear 77, the first interface 71 is connected to the fourth interface 74, and the second interface 72 is connected to the third interface 73.

[0036] In some other embodiments, a hydraulic mechanism B4 is further included, the structure of which is the same as that of the hydraulic mechanism A3 and the corresponding piston rods are arranged in parallel, thereby increasing the stability of the support frame 2 during the passive conforming process.

[0037] Specifically, the hydraulic mechanism B4 includes a hydraulic cylinder b41, a balancing valve b42 and a piston rod. The hydraulic cylinder b41 is arranged obliquely and its first end is tightly connected to the power head 1. The interior of the hydraulic cylinder b41 is divided into two upper and lower chambers along the gravity direction through the piston inside it. The chamber above the piston is the upper oil chamber, and the chamber below the piston is the lower oil chamber; the balancing valve b42 includes a valve body b421, a one-way throttling valve core b422 and a one-way valve core b423. The valve body b421 is provided with a one-way throttling channel b4211 and a one-way channel b4212 and its corresponding two ends are connected with the upper oil chamber and the lower oil chamber through pipelines; the one-way throttling valve core b422 is installed in the one-way throttling channel b4211 to control the one-way throttling channel b4211 to flow slowly in one direction from the lower oil chamber to the upper oil chamber, and the one-way valve core b423 is installed in the one-way channel b4212 to control the one-way flow of the one-way channel b4212 from the upper oil chamber to the lower oil chamber; one end of the piston rod is fixed to the piston, and the other end passes through the hydraulic cylinder b41. The second end is hinged to the support frame 2 to passively bear the force to realize movement with the support frame 2.

[0038] In one embodiment, a three-position four-way valve B8 is further included. The valve body of the three-position four-way valve B8 has four interfaces, namely, interface 1 81, interface 2 82, interface 3 83 and interface 4 84. Interface 1 81 is connected to the upper oil chamber of the hydraulic cylinder b41 of the hydraulic mechanism B4 through a pipeline; interface 2 82 is connected to the lower oil chamber of the hydraulic cylinder b41 of the hydraulic mechanism B4 through a pipeline via a balance valve b42 of the hydraulic mechanism B4;

[0039] The interface three 83 is connected to the oil outlet of the oil storage tank 9 through an oil pipeline, and the interface four 84 is connected to the third interface 73 through a pipeline.

[0040] Specifically, the three-position four-way valve B8 has three gear positions, namely gear position one 85, gear position two 86 and gear position three 87. When it is in gear position one 85, interface one 81 is connected to interface two 82, and interface three 83 is connected to interface four 84; when it is in gear position two 86, interface one 81 is connected to interface three 83, and interface two 82 is connected to interface four 84; when it is in gear position three 87, interface one 81 is connected to interface four 84, and interface two 82 is connected to interface three 83.

[0041] In one embodiment, a hydraulic pump 6 is further included, and the hydraulic pump 6 is installed on the oil pipeline.

[0042] Specifically, when the three-position four-way valve A7 is in the first gear position 75, the hydraulic cylinder a31 is in a passive following state. When it is in the second gear position 76, the hydraulic pump 6 can actively drive the piston of the hydraulic cylinder a31 to rise. When it is in the third gear position 77, the hydraulic pump 6 can actively drive the piston of the hydraulic cylinder a31 to descend.

[0043] Specifically, when the three-position four-way valve B8 is in gear position one 85, the hydraulic cylinder B41 is in a passive following state. When it is in gear position two 86, the hydraulic pump 6 can actively drive the piston of the hydraulic cylinder B41 to descend. When it is in gear position three 87, the hydraulic pump 6 can actively drive the piston of the hydraulic cylinder B41 to ascend.

[0044] This embodiment further includes a relief valve 10, which is connected in parallel to the oil pipeline.

[0045] In some embodiments, the support frame 2 includes a horizontal plate 23 connected in sequence, a vertical plate 24 perpendicular to the horizontal plate 23, and an inclined plate 25 arranged at an angle to the upper end of the vertical plate 24. The horizontal plate 23 and the inclined plate 25 are arranged on the same side of the vertical plate 24. The hydraulic mechanism A3 and the hydraulic mechanism B4 are arranged up and down. The piston rod of the hydraulic mechanism A3 is hinged to the upper end surface of the inclined plate 25, and the piston rod of the hydraulic mechanism B4 is hinged to the outer side surface of the vertical plate 24 away from the horizontal plate 23.

[0046] In some other specific embodiments, a servo motor 11 is further included. The fixed end of the servo motor 11 is firmly connected to the support frame 2 , and the power output end of the servo motor 11 is drivingly connected to the power input end of the trimming shears 21 .

[0047] In some specific embodiments, a controller is further included, and the controller is electrically connected to the hydraulic pump 6, the servo motor 11, the three-position four-way valve A7 and the three-position four-way valve B8.

[0048] In some other specific embodiments, there are two conformal wheels 22, which are symmetrically arranged on both sides of the support frame 2. Thus, the support frame 2 is more stable during walking.

[0049] In order to further optimize the above technical solution,

[0050] The specific principle and use method of a shrub trimmer with adaptive profiling function provided in this embodiment are as follows:

[0051] 1. Switch the three-position four-way valve B8 to the first gear position 85 through the controller, switch the three-position four-way valve A7 to the second gear position 76 and the third gear position 77, operate the hydraulic pump 6 to raise and lower the support frame 2, and adjust the support frame 2 to a suitable leveling height;

[0052] 2. Switch the three-position four-way valve A7 to the first gear position 75 through the controller, switch the three-position four-way valve B8 between the gear position 2 86 and the gear position 3 87, operate the hydraulic pump 6 to adjust the horizontality of the support frame 2, and adjust the support frame 2 to a suitable flat cutting angle;

[0053] 3. When the conformable wheel 22 rises with the terrain, the hydraulic oil in the upper oil chamber of the hydraulic cylinder a31 and the hydraulic cylinder b41 enters the lower oil chamber through the one-way channel a3212 and the one-way channel b4212 respectively; when the conformable wheel 22 descends with the terrain, the hydraulic oil in the lower oil chamber of the hydraulic cylinder a31 and the hydraulic cylinder b41 enters the upper oil chamber through the one-way throttling channel a3211 and the one-way throttling channel b4211 respectively, and slows down its flow speed to buffer the descending process of the support frame 2.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shrub trimmer with adaptive profiling function, characterized in that: include: Power head (1); A support frame (2), wherein a shaving shear (21) is mounted on the front end of the support frame (2), and a conformable ground wheel (22) is rotatably connected to the bottom end of the support frame (2); A hydraulic mechanism A (3), the hydraulic mechanism A (3) comprising a hydraulic cylinder a (31), a balancing valve a (32) and a piston rod, the hydraulic cylinder a (31) being arranged obliquely and having a first end thereof being tightly connected to the power head (1), the interior of the hydraulic cylinder a (31) being divided into two upper and lower chambers along the gravity direction by a piston therein, the chamber above the piston being an upper oil chamber, and the chamber below the piston being a lower oil chamber; the balancing valve a (32) comprising a valve body a (321), a one-way throttling valve core a (322) and a one-way valve core a (323), the valve body a (321) being provided with a one-way throttling channel a (3211) and a one-way channel a (3212), and its corresponding two ends are connected to the upper oil chamber and the lower oil chamber through pipelines; the one-way throttling valve core a (322) is installed in the one-way throttling channel a (3211) to control the one-way throttling channel a (3211) to slowly flow in a one-way direction from the lower oil chamber to the upper oil chamber, and the one-way valve core a (323) is installed in the one-way channel a (3212) to control the one-way channel a (3212) to flow in a one-way direction from the upper oil chamber to the lower oil chamber; one end of the piston rod is fixed to the piston, the other end passes through the hydraulic cylinder a (31), and the second end is hinged to the support frame (2) to passively bear the force and realize movement with the support frame (2).

2. A shrub trimmer with adaptive profiling function according to claim 1, characterized in that: The invention also comprises a hydraulic control system, the hydraulic control system comprising an oil storage tank (9) and a three-position four-way valve A (7), the oil storage tank (9) being provided with an oil outlet and an oil return port, the valve body of the three-position four-way valve A (7) being provided with four interfaces, the first interface (71) being connected to the lower oil chamber of the hydraulic cylinder a (31) via a pipeline, the second interface (72) being connected to the upper oil chamber of the hydraulic cylinder a (31) via a pipeline via the balance valve a (32), and the third interface (73) and the fourth interface (74) being connected to the oil outlet and the oil return port respectively via pipelines.

3. A shrub trimmer with adaptive profiling function according to claim 2, characterized in that: It also includes a hydraulic mechanism B (4), the structure of the hydraulic mechanism B (4) is the same as that of the hydraulic mechanism A (3), and the corresponding piston rods are arranged in parallel.

4. A shrub trimmer with adaptive profiling function according to claim 3, characterized in that: It also includes a three-position four-way valve B (8), wherein the valve body of the three-position four-way valve B (8) has four interfaces, namely interface 1 (81), interface 2 (82), interface 3 (83) and interface 4 (84), wherein the interface 1 (81) is connected to the upper oil chamber of the hydraulic cylinder b (41) of the hydraulic mechanism B (4) through a pipeline; the interface 2 (82) is connected to the lower oil chamber of the hydraulic cylinder b (41) of the hydraulic mechanism B (4) through a pipeline via a balance valve b (42) of the hydraulic mechanism B (4); The third interface (83) is in communication with the oil outlet of the oil storage tank (9) via an oil delivery pipeline, and the fourth interface (84) is in communication with the third interface (73) via a pipeline.

5. A shrub trimmer with adaptive profiling function according to claim 4, characterized in that: It also includes a hydraulic pump (6), which is installed on the oil pipeline.

6. A shrub trimmer with adaptive profiling function according to claim 5, characterized in that: It also includes a relief valve (10), wherein the relief valve (10) is connected in parallel to the oil pipeline.

7. The shrub trimmer with adaptive profiling function according to claim 5, characterized in that: The support frame (2) comprises a horizontal plate (23) connected in sequence, a vertical plate (24) perpendicular to the horizontal plate (23), and an inclined plate (25) arranged at an angle to the upper end of the vertical plate (24); the horizontal plate (23) and the inclined plate (25) are arranged on the same side of the vertical plate (24); the hydraulic mechanism A (3) and the hydraulic mechanism B (4) are arranged up and down; the piston rod of the hydraulic mechanism A (3) is hinged to the upper end surface of the inclined plate (25); the piston rod of the hydraulic mechanism B (4) is hinged to the outer side surface of the vertical plate (24) away from the horizontal plate (23).

8. A bush trimmer with adaptive profiling function according to claim 7, characterized in that: It also comprises a servo motor (11), wherein a fixed end of the servo motor (11) is tightly connected to the support frame (2), and a power output end of the servo motor (11) is drivingly connected to a power input end of the trimming shears (21).

9. A shrub trimmer with adaptive profiling function according to claim 8, characterized in that: It also includes a controller, which is electrically connected to the hydraulic pump (6), the servo motor (11), the three-position four-way valve A (7) and the three-position four-way valve B (8).

10. A bush trimmer with adaptive profiling function according to any one of claims 1 to 9, characterized in that: The number of the conformable ground wheels (22) is two, and they are symmetrically arranged on both sides of the support frame (2).

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