A grass rake head lifting control device for a grass rake

Abstract

The present invention relates to the technical field of grass rakers, and discloses a grass raking head lifting control device for a grass raker, comprising: a main support frame, the main support frame being mounted on a traction device; a lifting frame, the lifting frame being connected to the main support frame, two telescopic frames being slidably provided on both sides of the lifting frame, and a grass raking head being connected to the ends of the telescopic frames; a lifting drive motor, the lifting drive motor being connected to the main support frame and used to drive the lifting frame to move up and down, and the lifting frame being connected to the main support frame after moving to a preset height; and a controller, the controller being used to control the start and stop of the lifting drive motor. The present invention synchronously realizes the lifting and lowering control of multiple grass raking heads, and automatically hooks and locks the lifting frame after the lifting frame rises to a preset height, thereby reducing the load of the lifting drive motor and preventing damage to the driving motor shaft due to excessive torque when the lifting frame is in an ascending state for a long time.

Description

Technical Field

[0001] The present invention relates to the technical field of grass rakes, and more particularly to a grass rake head lifting control device of a grass rake. Background Art

[0002] A hay rake is a harvesting machine that gathers grass from the ground into swaths. The purpose of raking is to dry the grass thoroughly and facilitate hay collection. The rake is equipped with a raking head that rotates to gather the grass.

[0003] In the prior art, utility model patent application number CN206061568U discloses a foldable grass rake with a grass rake arm extension device, comprising a mounting frame fixedly connected to a rotating frame via a connecting seat, the rotating frame fixedly connected to a support frame via a base, a folding arm provided on the rotating frame, the folding arm movably connected to a connecting rod via a connecting plate, the other end of the connecting rod movably connected to a connecting rod disk, the folding arm fixedly connected to the grass rake arm via an adjusting bolt, and grass rake teeth provided on the grass rake arm. The mounting frame is provided with a drive shaft, which is transmission-connected to the rotating frame via a rotating shaft, the connecting frame fixedly connected to a screw via a screw mounting seat, the screw screw transmission-connected to the connecting rod disk via a screw nut, and the screw screw fixedly connected to a lifting motor. This device uses a lifting motor to drive a screw to raise the grass rake arm, allowing the grass rake head to fold when not in use. However, in actual use, the weight of the multiple folding arms is concentrated on the screw, placing a heavy load on the drive motor and making it prone to damage.

[0004] Therefore, it is necessary to propose a grass rake head lifting control device for a grass rake to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a raking head lifting control device for a grass rake, comprising:

[0007] Main support frame, the main support frame is installed on the traction equipment;

[0008] The lifting frame is connected to the main support frame, and two telescopic frames are slidably provided on both sides of the lifting frame, and the ends of the telescopic frames are connected to the grass raking heads;

[0009] The lifting drive motor is connected to the main support frame and is used to drive the lifting frame to move up and down. After the lifting frame moves to a preset height, it is connected to the main support frame;

[0010] Controller, the controller is used to control the start and stop of the lifting drive motor.

[0011] Preferably, the main support frame includes: a vertical rod, a support rod and a first support roller, the first support roller is installed on the traction equipment, two vertical rods are connected to the front and rear ends of the first support roller; two support rods are symmetrically connected to the left and right sides of the vertical rod; and the lifting drive motor is installed at the end of the support rod.

[0012] Preferably, the lifting frame comprises:

[0013] A first frame, one end of the first frame being hinged to the vertical rod;

[0014] A second frame body, the second frame body is connected between the front and rear first frames, and the two telescopic frames are slidably connected to both sides of the second frame body;

[0015] The third frame is configured as an arc frame, and the bottom end of the third frame is connected to the end end of the first frame.

[0016] Preferably, the output end of the lifting drive motor is connected to a gear, and an arc-shaped transmission tooth groove is provided on the third frame, and the gear is meshed and connected in the transmission tooth groove.

[0017] Preferably, the second frame includes a telescopic slot, a limiting hole and a limiting bolt. The telescopic slot is arranged on the outside of the second frame, and the telescopic slot is inclined relative to the center of the main support frame. The two telescopic frames are respectively slidably arranged on both sides of the telescopic slot. A through hole is provided on the telescopic frame. Multiple limiting holes are evenly arranged in the telescopic slot and evenly arranged along its length direction. The limiting bolt passes through the through hole and is screwed to any one of the limiting holes.

[0018] Preferably, it also includes a hanging unit, which includes a hanging seat and a hanging rod. The hanging seat is connected to the top of the vertical rod, and the hanging rod is connected to the top of the third frame. A pressure sensor is provided on the hanging rod for detecting the pressure value between the hanging rod and the hanging seat. The pressure sensor is electrically connected to the controller.

[0019] Preferably, the hitch rod comprises:

[0020] Sliding grooves, two sliding grooves are symmetrically arranged on both sides of the hook rod and connected at the center;

[0021] A sliding frame is slidably disposed in the sliding groove and one end of the sliding frame extends out of the sliding groove, a spring is connected between the two sliding frames, and a pressure sensor is connected to the extended end of the sliding frame;

[0022] The hanging claw is connected to the extended end of the sliding frame, and the two hanging claws are arranged on the opposite sides of the two sliding frames.

[0023] Preferably, the mounting seat comprises:

[0024] Hydraulic cylinders, two hydraulic cylinders are symmetrically arranged on both sides of the hitch seat cavity, and the hydraulic cylinders are electrically connected to the controller;

[0025] A pressure plate is connected to the output end of the hydraulic cylinder, and the maximum distance between the two pressure plates is greater than the maximum distance between the two hooking claws in the deployed state;

[0026] A limit block is connected to the side of the hook seat cavity close to the hook rod, and the limit block is correspondingly arranged with the hook claw;

[0027] The conical opening is connected to a side of the hook seat cavity close to the hook rod.

[0028] Preferably, the grass rake head lifting control device of the grass rake further includes a dust control unit, and the dust control unit includes:

[0029] A second support roller is connected between the front and rear vertical rods, and a plurality of protrusions are evenly arranged on the second support roller;

[0030] The dust screen is connected to the two second frames at both ends and surrounds the bottom of the second support roller in the middle. The dust screen is elastic and the holes expand when the dust screen is stretched.

[0031] The particle sensor is arranged on the vertical pole and located above the dust shield.

[0032] Preferably, the dust control unit further includes:

[0033] A bearing plate is connected between the front and rear vertical rods and is located above the dust screen;

[0034] Guide fans: two guide fans are rotatably arranged at the center of the bearing plate;

[0035] A first pulley, the first pulley is connected to the top end of the guide fan shaft;

[0036] The second pulley is provided as two coaxial ones, the second pulley shaft is connected to the vertical rod, and the second pulley axis is provided horizontally;

[0037] The motor is connected to the vertical rod through a bracket, and the motor output shaft is connected to the second support roller;

[0038] The third pulley is connected to the output shaft of the motor. A transmission belt is arranged around the third pulley. The transmission belt passes around the second pulley and is connected to the first pulley.

[0039] Compared with the prior art, the present invention has at least the following beneficial effects:

[0040] The present invention provides a raking head lifting control device for a grass raking machine, which realizes flexible lifting of the lifting frame through a lifting drive motor and synchronously realizes the lifting control of multiple grass raking heads; after the lifting frame rises to a preset height, it is automatically hooked and locked, reducing the load of the lifting drive motor, and preventing the driving motor shaft from being damaged by excessive torque when it is in an ascending state for a long time; the grass raking heads are installed through a telescopic frame, and the distance between the grass raking heads can be adjusted to adapt to different grass raking operation areas and operation modes.

[0041] The present invention relates to a grass rake head lifting control device for a grass rake. Other advantages, objectives and features of the present invention will be reflected in part through the following description, and will also be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0043] Figure 1 This is a structural schematic diagram of a raking head lifting control device of a raking machine according to the present invention (raking head lowered state);

[0044] Figure 2 This is a structural schematic diagram of a raking head lifting control device of a raking machine according to the present invention (raking head raised state);

[0045] Figure 3 is a schematic structural diagram of the second frame in the present invention;

[0046] Figure 4 Schematic diagram of the structure of the main support frame in the present invention;

[0047] Figure 5 Schematic diagram of the structure of the load-bearing plate in the present invention;

[0048] Figure 6 Schematic diagram of the cross-sectional structure of the second support roller in the present invention;

[0049] Figure 7 Schematic diagram of the cross-sectional structure of the mounting base and the mounting rod in the present invention (unmounted);

[0050] Figure 8 Schematic diagram of the cross-sectional structure of the mounting base and the mounting rod in the present invention (mounted state).

[0051] In the figure: 1. Main support frame; 2. Lifting frame; 3. Telescopic frame; 4. Rake head; 5. Lifting drive motor; 6. Mounting seat; 7. Mounting rod; 8. Pressure sensor; 11. Vertical rod; 12. Support rod; 13. First support roller; 21. First frame; 22. Second frame; 23. Third frame; 24. Transmission tooth groove; 25. Telescopic groove; 26. Limiting hole; 27. Limiting bolt; 31. Sliding groove; 32. Sliding frame; 33. Spring; 34. Mounting claw; 35. Hydraulic cylinder; 36. Pressure plate; 37. Limiting block; 38. Conical mouth; 41. Second support roller; 42. Dust screen; 43. Loading plate; 44. Guide fan; 45. First pulley; 46. Second pulley; 47. Motor; 48. Bracket; 49. Third pulley; 50. Transmission belt. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0053] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof. Example 1:

[0054] like Figures 1-8 As shown, the present invention provides a grass rake head lifting control device of a grass rake, comprising:

[0055] Main support frame 1, main support frame 1 is installed on the traction equipment;

[0056] The lifting frame 2 is connected to the main support frame 1. Two telescopic frames 3 are slidably provided on both sides of the lifting frame 2. The ends of the telescopic frames 3 are connected to the grass raking heads 4;

[0057] The lifting drive motor 5 is connected to the main support frame 1 and is used to drive the lifting frame 2 to move up and down. After the lifting frame 2 moves to a preset height, it is connected to the main support frame 1;

[0058] The controller is used to control the start and stop of the lifting drive motor 5.

[0059] The working principle and beneficial effects of the above technical solution are:

[0060] The present invention provides a raking head lifting control device for a grass rake. A main support frame 1 of the device is mounted on a traction device. When the grass rake is not raking, a controller activates a lifting drive motor 5, driving the lifting frame 2 upward, separating the raking head 4 thereon from the ground. When the lifting frame 2 rises to a preset height, the lifting frame 2 automatically connects to the main support frame 1. At this point, the controller deactivates the lifting drive motor 5, maintaining the stable position of the lifting frame 2 through the connection. When the grass rake arrives at a designated location for raking, the lifting frame 2 is unlocked from the main support frame 1, and the lifting drive motor 5 is activated simultaneously, flipping the lifting frame 2 downward to a preset height so that the raking head 4 contacts the grass on the ground. Two telescopic frames 3 are slid to change their extension length, thereby adjusting the front-to-back distance of the raking head 4.

[0061] The present invention provides a raking head lifting control device for a grass raking machine, which realizes flexible lifting of the lifting frame 2 through the lifting drive motor 5, and synchronously realizes the lifting control of multiple raking heads 4; after the lifting frame 2 rises to a preset height, it is automatically hooked and locked, reducing the load of the lifting drive motor 5, and preventing the driving motor 5 from being damaged by excessive torque on the rotating shaft when it is in the rising state for a long time; the raking heads 4 are installed through the telescopic frame 3, and the distance between the raking heads 4 can be adjusted to make it adapt to different raking operation areas and operation modes. Example 2:

[0062] Based on the above-mentioned embodiment 1, the main support frame 1 includes: a vertical rod 11, a support rod 12 and a first support roller 13. The first support roller 13 is installed on the traction equipment. The two vertical rods 11 are connected to the front and rear ends of the first support roller 13; the two support rods 12 are symmetrically connected to the left and right sides of the vertical rod 11; and the lifting drive motor 5 is installed at the end of the support rod 12.

[0063] Lifting frame 2 includes:

[0064] A first frame 21, one end of which is hinged to the vertical rod 11;

[0065] The second frame 22 is connected between the front and rear first frames 21, and the two telescopic frames 3 are slidably connected to both sides of the second frame 22;

[0066] The third frame 23 is configured as an arc-shaped frame, and the bottom end of the third frame 23 is connected to the end of the first frame 21 .

[0067] The output end of the lifting drive motor 5 is connected to a gear 14 . An arc-shaped transmission tooth groove 24 is provided on the third frame 23 , and the gear 14 is meshed and connected in the transmission tooth groove 24 .

[0068] The working principle and beneficial effects of the above technical solution are:

[0069] The main support frame 1 provides support for the lifting frame 2. When the raking head 4 needs to be raised, the controller activates the lifting drive motor 5 to rotate forward, causing the gear 14 at its output end to rotate accordingly. The gear 14 engages with the transmission tooth groove 24, driving the third frame 23 upward. The third frame 23 then pulls the first frame 21 below it upward. Under the lifting action of the two first frames 21, the second frame 22 also moves upward, driving the raking head 4 upward, thus achieving the lifting action of the raking head 4. When the raking head 4 needs to be lowered, the controller activates the lifting drive motor 5 to flip, causing the gear 14 to rotate in the opposite direction, driving the third frame 23 and the first frame 21 downward, and then the second frame 22 and the raking head 4 downward.

[0070] Through the above-mentioned structural design, the raking head 4 is driven to rise and fall by gear transmission, and the transmission ratio is accurate, which ensures the accuracy of position control of the raking head 4 during the lifting process. The raking head 4 on each side is controlled by two front and rear lifting drive motors 5, which reduces the load of the lifting drive motor 5 and improves the consistency of the lifting action of the unilateral raking head 4, reducing the control difficulty. Example 3:

[0071] On the basis of the above-mentioned embodiment 2, the second frame body 22 includes a telescopic slot 25, a limiting hole 26 and a limiting bolt 27. The telescopic slot 25 is arranged on the outside of the second frame body 22, and the telescopic slot 25 is inclined relative to the center of the main support frame 1. The two telescopic frames 3 are respectively slidably arranged on both sides of the telescopic slot 25. A through hole is provided on the telescopic frame 3. Multiple limiting holes 26 are evenly arranged in the telescopic slot 25 and evenly arranged along its length direction. The limiting bolt 27 passes through the through hole and is screwed to any one of the limiting holes 26.

[0072] The working principle and beneficial effects of the above technical solution are:

[0073] The second frame 22 is provided with an expansion slot 25, which is tilted. This allows the raking heads 4 on the expansion frame 3 to be staggered front and back, facilitating the gradual gathering of grass from the outer edges toward the center of the device during raking. The expansion frame 3 is slid back and forth along the expansion slot 25 to adjust the distance between the front and rear raking heads 4 to a preset value, adapting to different raking areas and operating modes. Bolts are then used to connect the through holes of the raking heads 4 to the corresponding stop holes 26, securing the raking heads 4 in place. Example 4:

[0074] On the basis of the above-mentioned embodiment 2, the mowing head lifting control device of the mower further includes a hanging unit, which includes a hanging seat 6 and a hanging rod 7. The hanging seat 6 is connected to the top of the vertical rod 11, and the hanging rod 7 is connected to the top of the third frame 23. A pressure sensor 8 is provided on the hanging rod 7 for detecting the pressure value between the hanging rod 7 and the hanging seat 6. The pressure sensor 8 is electrically connected to the controller.

[0075] The working principle and beneficial effects of the above technical solution are:

[0076] The hooking rod 7 is arranged at the top of the third frame 23 and can move synchronously with the third frame 23. When the third frame 23 rises to a preset height, the hooking rod 7 penetrates into the hook seat 7 and contacts the pressure sensor 8 in the hook seat 7. When a pressure signal is detected, it indicates that the hooking rod 7 has reached the preset position and can be hooked in place. At this time, the controller controls the lifting drive motor 5 to stop running. The provision of the pressure sensor 8 provides a basis for the start and stop control of the lifting drive motor 5. At the same time, based on the pressure detection result, it can promptly identify the situation where the hooking rod 7 cannot reach the preset position, which is convenient for inspection and maintenance. Example 5:

[0077] On the basis of the above embodiment 4, the hook rod 7 includes:

[0078] Sliding grooves 31, two sliding grooves 31 are symmetrically arranged on both sides of the hook rod 7 and are connected at the center;

[0079] A sliding frame 32 is slidably disposed in the sliding groove 31 and one end of the sliding frame extends out of the sliding groove 31 . A spring 33 is connected between the two sliding frames 32 . The extended end of the sliding frame 32 is connected to the pressure sensor 8 .

[0080] The hook claw 34 is connected to the extended end of the sliding frame 32 , and the two hook claws 34 are arranged on opposite sides of the two sliding frames 32 .

[0081] The working principle and beneficial effects of the above technical solution are:

[0082] When the hook rod 7 has not entered the hook seat 6, the two sliding frames 32 move away from each other under the action of the spring 33; when the hook rod 7 enters the hook seat 6, the hook seat 6 squeezes the hook claw 34 inward, causing the two sliding frames 32 to move closer to the center, and the sliding frames 32 slide in the sliding groove 31. When the hook claw 34 completely enters the hook seat 6, the two sliding frames 32 move outward and reset under the action of the spring 33, and the two hook claws 34 are clamped in the hook seat 6, realizing the connection between the hook rod 7 and the hook seat 6; under the limiting connection action of the hook claw 34 and the hook seat 6, the suspension of the third frame 23 and the second frame 22 is realized. Example 6:

[0083] On the basis of the above embodiment 5, the mounting base 6 includes:

[0084] Hydraulic cylinders 35, two hydraulic cylinders 35 are symmetrically arranged on both sides of the cavity of the mounting seat 6, and the hydraulic cylinders 35 are electrically connected to the controller;

[0085] The pressure plate 36 is connected to the output end of the hydraulic cylinder 35. The maximum distance between the two pressure plates 36 is greater than the maximum distance between the two hook claws 34 in the deployed state.

[0086] The limit block 37 is connected to the side of the cavity of the hook seat 6 close to the hook rod 7, and the limit block 37 is corresponding to the hook claw 34;

[0087] The tapered opening 38 is connected to the side of the cavity of the hanging seat 6 close to the hanging rod 7.

[0088] The working principle and beneficial effects of the above technical solution are:

[0089] When the hooking rod 7 and the hooking seat 6 are not hooked, the controller controls the two hydraulic cylinders 35 to be in a retracted state, so that the pressure plates 36 are close to the two sides of the hooking seat 6 cavity, and the distance between the two pressure plates 36 is greater than the maximum distance between the two hooking claws 34 in the free state; when the hooking rod 7 moves to the hooking seat 6, it slides along the tapered mouth 38 to the center of the hooking seat 6, and the two hooking claws 34 are squeezed and enter the hooking seat 6 cavity until the pressure sensor 8 at the end of the hooking claw 34 contacts the hooking seat 6 cavity. When the pressure sensor When the pressure signal detected by 8 reaches the preset value, it indicates that the hanging rod 7 reaches the preset position. At this time, the hanging seat 34 is completely located in the cavity of the hanging seat 6 and is in a state of being expanded to both sides; at the same time, the controller controls the lifting drive motor 5 to stop running, and the output shaft of the lifting drive motor 5 can rotate freely; under the action of the gravity of the third frame 23, the second frame 22 and the grass raking head 4, the third frame 23 drives the hanging rod 7 to move downward, so that the hanging claw 34 is clamped on the limit block 37, thereby realizing the hanging of the hanging rod 7 and the hanging seat 6.

[0090] When the hook rod 7 and the hook seat 6 are unlocked, the controller starts the lifting drive motor 5 to rotate forward, moves the hook claw 34 upward again, and makes the pressure sensor 8 contact the cavity of the hook seat 6 again. At this time, the two hydraulic cylinders 35 are started to extend, pushing the pressure plate 36 to extend inward and squeezing the hook claw 34 toward the center; then the lifting drive motor 5 is started to reverse, so that the hook rod 7 moves out of the cavity of the hook seat 6, and finally the hydraulic cylinder 35 is controlled to retract to reset the pressure plate 36.

[0091] Through the above structural design, the setting of the tapered mouth 38 can guide the hook rod 7 into the cavity of the hook seat 6, reducing the situation where the lifting frame 2 is not properly hooked due to position deviation; through the setting of the pressure plate 36, when in the hooked state, the two pressure plates 36 are away from each other, and the hook claw 34 can move in the cavity of the hook seat 6. When the device travels on an uneven ground, the cavity reserves space for the hook claw 34 to move, reducing the risk of the hook claw 34 breaking when it is subjected to vibration due to excessive connection stiffness; and During the vibration process, since the two hooking claws 34 are expanded under the action of the spring 33, the distance between them is greater than the distance at the entrance of the hook seat 6, and the hooking claws 34 will not fall off; the hooking unit needs to be unlocked with the cooperation of the lifting drive motor 5 and the hydraulic cylinder 35, which improves the safety of the hooking; and in the unlocking process, the lifting drive motor 5 rotates forward first and then reverses, which can make the driving states of the lifting drive motors 5 on both sides consistent when unlocking, and the meshing state of the gear 14 and the transmission tooth groove 34 consistent, thereby improving the synchronization of the lifting frames 2 on both sides. Example 7:

[0092] On the basis of the above-mentioned embodiment 2, the grass rake head lifting control device of the grass rake further includes a dust control unit, and the dust control unit includes:

[0093] A second support roller 41, the second support roller 41 is connected between the front and rear vertical rods 11;

[0094] The dust screen 42 is connected to the two second frames 22 at both ends and surrounds the bottom of the second support roller 41 in the middle. The dust screen 42 is elastic and the holes expand when the dust screen 42 is stretched.

[0095] The particle sensor is arranged on the vertical rod 11 and is located above the dust shield 42 .

[0096] The working principle and beneficial effects of the above technical solution are:

[0097] When the mower is operating, the rapid rotation of the mowing head 4 will generate a large amount of dust. The dust will float up and enter the lifting control device, affecting the movement of the various components of the device. On the other hand, the dust will affect the working environment and the vision of the staff. Therefore, a dust control unit is set in the mowing head lifting control device, and a dust screen 42 is connected to the two second frames 22, and a second support roller 41 is set to support the center of the dust screen 42; when the mowing operation is performed, the height of the two second frames 22 is lowered, the height of the two sides of the dust screen 42 approaches the horizontal, and the holes on the dust screen 42 are smaller; when the mowing head 4 mows toward the center, the dust screen 42 blocks the dust and makes it fall back to the ground, which helps to maintain the cleanliness of the upper transmission components and ensure the normal operation of the lifting process. Example 8:

[0098] Based on the above embodiment 7, the dust control unit further includes:

[0099] The bearing plate 43 is connected between the front and rear vertical rods 11 and is located above the dust screen 42;

[0100] The two guide fans 44 are rotatably disposed at the center of the supporting plate 43;

[0101] A first pulley 45, which is connected to the top of the rotating shaft of the guide fan 44;

[0102] The second pulley 46 is provided as two coaxial ones, the rotating shaft of the second pulley 46 is connected to the vertical rod 11, and the axis of the second pulley 46 is provided horizontally;

[0103] Motor 47, motor 47 is connected to the vertical rod 11 through a bracket 48, and the output shaft of motor 47 is connected to the second support roller 41;

[0104] The third pulley 49 is connected to the output shaft of the motor 47 . A transmission belt 50 is arranged around the third pulley 49 . The transmission belt 50 passes around the second pulley 46 and is connected to the first pulley 45 .

[0105] The working principle and beneficial effects of the above technical solution are:

[0106] When the grass rake is in use, the particle concentration on the upper part of the device is detected by the particle sensor. When the particle concentration exceeds the preset value, it indicates that the dust control is not ideal. At this time, the motor 47 is started, and the output shaft of the motor 47 drives the second support roller 41 and the third pulley 49 to rotate. The third pulley 49 moves through the transmission belt 50. The transmission belt 50 drives the first pulley 45 to rotate under the guidance of the second pulley 46, and then drives the guide fan 44 shaft to rotate. When the blades of the guide fan 44 rotate, the airflow is transported downward from the top of the device and flows through the dust shield 42. The dust is suppressed downward by the airflow pressure, further improving the dust control effect. When the grass mower is not in operation and the grass mowing head 4 is in an upward state, the two second frames 22 rise, pulling the end of the dust screen 42 up, the dust screen 42 is in a stretched state, and the holes on it are enlarged; at the same time, the motor 47 is started, and the motor 47 drives the guide fan 44 to rotate, transporting the air flow from the top of the device downward and flowing through the dust screen 42 to clean the dust accumulated on the dust screen 42, making it easier to use in subsequent operations; at the same time, the second support roller 41 rotates, and the protrusions on the support rod 41 knock on the dust screen 42, causing the dust accumulated on the dust screen 42 to vibrate, making it easier to clean under the action of the air flow.

[0107] Through the above-mentioned structural design, a dust control unit is integrated on the mowing head lifting control device. During the operation of the mower, the dust is controlled below the dust shield 42 through the combined action of the dust shield 42 and the airflow, so as to prevent the dust from affecting the transmission of the lifting components, thereby reducing the impact on the environment and the obstruction of the workers' vision during operation; when the mowing operation is not in progress, the dust shield 42 can be cleaned in time, so that the dust shield 42 can block the dust particles while ensuring that the airflow can pass through the holes.

[0108] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0109] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0110] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A grass rake head lifting control device for a grass rake, characterized in that: include: A main support frame (1), the main support frame (1) is installed on the traction equipment; A lifting frame (2), the lifting frame (2) is connected to the main support frame (1), two telescopic frames (3) are slidably provided on both sides of the lifting frame (2), and the ends of the telescopic frames (3) are connected to grass raking heads (4); A lifting drive motor (5), the lifting drive motor (5) is connected to the main support frame (1) and is used to drive the lifting frame (2) to move up and down, and the lifting frame (2) is connected to the main support frame (1) after moving to a preset height; A controller, the controller is used to control the start and stop of the lifting drive motor (5); The main support frame (1) comprises: a vertical rod (11), a support rod (12) and a first support roller (13); the first support roller (13) is installed on the traction device; the two vertical rods (11) are connected to the front and rear ends of the first support roller (13); the two support rods (12) are symmetrically connected to the left and right sides of the vertical rod (11); and the lifting drive motor (5) is installed at the end of the support rod (12); The lifting frame (2) comprises: A first frame (21), one end of the first frame (21) is hinged to the vertical rod (11); A second frame (22), the second frame (22) is connected between the front and rear first frames (21), and the two telescopic frames (3) are slidably connected to both sides of the second frame (22); A third frame (23), the third frame (23) is configured as an arc-shaped frame, and the bottom end of the third frame (23) is connected to the end of the first frame (21); A grass raking machine grass raking head lifting control device also includes a hanging unit, the hanging unit includes a hanging seat (6) and a hanging rod (7), the hanging seat (6) is connected to the top of the vertical rod (11), the hanging rod (7) is connected to the top of the third frame (23), a pressure sensor (8) is provided on the hanging rod (7) for detecting the pressure value between the hanging rod (7) and the hanging seat (6), and the pressure sensor (8) is electrically connected to the controller; The hitch rod (7) comprises: Sliding grooves (31), two sliding grooves (31) are symmetrically arranged on both sides of the hook rod (7) and are connected at the center; A sliding frame (32), the sliding frame (32) is slidably disposed in the sliding groove (31) and one end thereof extends out of the sliding groove (31), a spring (33) is connected between the two sliding frames (32), and a pressure sensor (8) is connected to the extended end of the sliding frame (32); A hooking claw (34), the hooking claw (34) is connected to the protruding end of the sliding frame (32), and the two hooking claws (34) are arranged on opposite sides of the two sliding frames (32); The mounting seat (6) comprises: Hydraulic cylinders (35), two hydraulic cylinders (35) are symmetrically arranged on both sides of the cavity of the hook seat (6), and the hydraulic cylinders (35) are electrically connected to the controller; A pressure plate (36), the pressure plate (36) is connected to the output end of the hydraulic cylinder (35), and the maximum distance between the two pressure plates (36) is greater than the maximum distance between the two hook claws (34) in the expanded state; A limit block (37), the limit block (37) is connected to a side of the cavity of the hook seat (6) close to the hook rod (7), and the limit block (37) is correspondingly arranged with the hook claw (34); The conical opening (38) is connected to a side of the cavity of the hook seat (6) close to the hook rod (7).

2. The grass rake head lifting control device of the grass rake according to claim 1, characterized in that: The output end of the lifting drive motor (5) is connected to a gear (14), and an arc-shaped transmission tooth groove (24) is provided on the third frame (23), and the gear (14) is meshed and connected in the transmission tooth groove (24).

3. The raking head lifting control device of a grass rake according to claim 1, characterized in that: The second frame (22) includes a telescopic slot (25), a limiting hole (26) and a limiting bolt (27). The telescopic slot (25) is arranged on the outside of the second frame (22), and the telescopic slot (25) is inclined relative to the center of the main support frame (1). The two telescopic frames (3) are respectively slidably arranged on both sides of the telescopic slot (25). The telescopic frame (3) is provided with a through hole. A plurality of limiting holes (26) are evenly arranged in the telescopic slot (25) and evenly arranged along the length direction thereof. The limiting bolt (27) passes through the through hole and is screwed to any one of the limiting holes (26).

4. The raking head lifting control device of a grass rake according to claim 1, characterized in that: It also includes a dust control unit, which includes: A second support roller (41), the second support roller (41) is connected between the front and rear vertical rods (11), and a plurality of protrusions are evenly arranged on the second support roller (41); A dust screen (42), wherein both ends of the dust screen (42) are connected to the two second frames (22) and the middle portion surrounds the bottom of the second support roller (41); the dust screen (42) is elastic, and the holes of the dust screen (42) expand when the dust screen (42) is stretched; A particle sensor is provided on the vertical rod (11) and is located above the dust shield (42).

5. The raking head lifting control device of a grass rake according to claim 4, characterized in that: The dust control unit also includes: A bearing plate (43), the bearing plate (43) is connected between the front and rear vertical rods (11) and is located above the dust screen (42); Guide fans (44), two guide fans (44) are rotatably arranged at the center of the supporting plate (43); A first pulley (45), the first pulley (45) is connected to the top end of the rotating shaft of the guide fan (44); A second pulley (46), wherein the second pulleys (46) are arranged as two coaxial ones, the rotating shaft of the second pulley (46) is connected to the vertical rod (11), and the axis of the second pulley (46) is arranged horizontally; A motor (47), the motor (47) is connected to the vertical rod (11) through a bracket (48), and the output shaft of the motor (47) is connected to the second support roller (41); The third pulley (49) is connected to the output shaft of the motor (47). A transmission belt (50) is arranged around the third pulley (49). The transmission belt (50) passes around the second pulley (46) and is connected to the first pulley (45).

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