Hay raking head lifting control device of hay raking machine

Abstract

The invention relates to the technical field of hay raking machines, and discloses a hay raking head lifting control device of a hay raking machine, which comprises a main support frame arranged on traction equipment; the lifting frame is connected to the main supporting frame, two telescopic frames are arranged on the two sides of the lifting frame in a sliding mode, and the end of each telescopic frame is connected with a hay raking head; the lifting driving motor is connected to the main supporting frame and used for driving the lifting frame to ascend and descend, and the lifting frame is connected with the main supporting frame in a hung mode after moving to the preset height; and the controller is used for controlling start and stop of the lifting driving motor. Lifting control over the multiple raking heads is synchronously achieved, automatic hooking and locking are achieved after the lifting frame ascends to the preset height, the load of the lifting driving motor is reduced, and damage caused by too large torque of a rotating shaft of the driving motor when the lifting frame is in the ascending state for a long time is prevented.

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 grass rake is a grass harvesting machine that raks the grass scattered on the ground into grass strips. The purpose of raking grass is to make the grass fully dry and to facilitate the collection of hay. The grass rake is provided with a raking head, which gathers the grass by rotating the raking head.

[0003] In the prior art, for example, the utility model patent with application number CN206061568U discloses a foldable grass mower with a grass mowing arm extension device, including a mounting frame fixedly connected to a rotating seat through a connecting seat, a rotating seat fixedly connected to a supporting frame through a base, a folding arm provided on the rotating seat, a folding arm movably connected to a connecting rod through a connecting plate, the other end of the connecting rod movably connected to a connecting rod disk, a folding arm fixedly connected to the grass mowing arm through an adjusting bolt, a grass mowing rake tooth provided on the grass mowing arm, a transmission shaft provided on the mounting frame, a transmission shaft transmission connection with the rotating seat through a rotating shaft, a connecting seat fixedly connected to a screw rod through a screw rod mounting seat, a screw rod transmission connection with a connecting rod disk through a screw rod nut, and a screw rod fixedly connected to a lifting motor. This device drives the screw rod to raise the grass mowing arm through a lifting motor, so that the grass mowing head can be folded when the grass mowing operation is not being performed; however, in actual use, the weight of multiple folding arms is concentrated on the screw rod, the load of the driving motor is large, and it is easy to be damaged.

[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] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the present invention provides a grass rake head lifting control device of a grass rake, comprising:

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

[0008] A lifting frame, the lifting frame is connected to the main support frame, two telescopic frames are slidably arranged on both sides of the lifting frame, and a grass raking head is connected to the end of the telescopic frame;

[0009] A 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 support roller, the support roller is installed on the traction equipment, two vertical rods are connected to the front and rear ends of the 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 which is hinged to the vertical rod;

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

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

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

[0017] Preferably, the second frame body includes a telescopic slot, a limiting hole and a limiting bolt. The telescopic slot is arranged on the outside of the second frame body, 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 arranged 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 to detect 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 are connected at the center;

[0021] A sliding frame, the sliding frame is slidably arranged 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] A hooking claw is connected to the extended end of the sliding frame, and two hooking 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 mounting seat cavity, and the hydraulic cylinders are electrically connected to the controller;

[0025] A pressure plate, the 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 unfolded state;

[0026] A limit block, which is connected to a side of the mounting seat cavity close to the mounting rod, and the limit block is arranged corresponding to the mounting claw;

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

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

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

[0030] The dust-blocking net has two ends connected to the two second frames and a middle part surrounding the bottom of the support roller. The dust-blocking net is elastic and the holes expand when the dust-blocking net is stretched;

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

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

[0033] A bearing plate, which is connected between the front and rear vertical rods and is located above the dust shield net;

[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 arranged as two coaxial pulleys, the second pulley shaft is connected to the vertical rod, and the second pulley axis is arranged horizontally;

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

[0038] The third pulley is connected to the output shaft of the motor, a transmission belt is arranged around the third pulley, and the transmission belt is connected to the first pulley after passing around the second 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 to reduce the load of the lifting drive motor and prevent the drive motor shaft from being damaged due to excessive torque when it is in an ascending state for a long time; the raking heads are installed through a telescopic frame, and the distance between the raking heads can be adjusted to make it adapt to different raking operation areas and operation modes.

[0041] The present invention relates to a mowing head lifting control device for a mower. Other advantages, objectives and features of the present invention will be reflected in part through the following description, and will also be understood by technicians in this field 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 It is a structural schematic diagram of a raking head lifting control device of a raking machine of the present invention (the raking head is in a descending state);

[0044] Figure 2 It is a structural schematic diagram of a grass raking head lifting control device of a grass raking machine of the present invention (grass raking head rising state);

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

[0046] Figure 4 It is a structural schematic diagram of the main support frame in the present invention;

[0047] Figure 5 It is a structural schematic diagram of the load-bearing plate in the present invention;

[0048] Figure 6 It is a schematic diagram of the cross-sectional structure of the support roller in the present invention;

[0049] Figure 7 It is a schematic diagram of the cross-sectional structure of the mounting seat and the mounting rod in the present invention (unmounted state);

[0050] Figure 8 It is a schematic diagram of the cross-sectional structure of the mounting seat 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. Support roller; 21. First frame; 22. Second frame; 23. Third frame; 24. Transmission tooth groove; 25. Telescopic groove; 26. Limit hole; 27. Limit bolt; 31. Sliding groove; 32. Sliding frame; 33. Spring; 34. Mounting claw; 35. Hydraulic cylinder; 36. Pressure plate; 37. Limit block; 38. Conical mouth; 41. 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 is further described in detail below in conjunction with 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 the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0054] Embodiment 1:

[0055] like Figure 1-Figure 8 As shown, the present invention provides a grass rake head lifting control device of a grass rake, comprising:

[0056] A main support frame 1, the main support frame 1 is installed on the traction equipment;

[0057] A lifting frame 2, the lifting frame 2 is connected to the main support frame 1, two telescopic frames 3 are slidably arranged on both sides of the lifting frame 2, and a grass raking head 4 is connected to the end of the telescopic frame 3;

[0058] A lifting drive motor 5, which is connected to the main support frame 1 and is used to drive the lifting frame 2 to move up and down. The lifting frame 2 is connected to the main support frame 1 after it moves to a preset height;

[0059] The controller is used to control the start and stop of the lifting drive motor 5.

[0060] The working principle and beneficial effects of the above technical solution are:

[0061] The present invention provides a grass raking head lifting control device for a grass raking machine. The main support frame 1 of the device is installed on a traction device. When the grass raking machine is not performing grass raking operations, the controller starts the lifting drive motor 5 to drive the lifting frame 2 to rise, so that the grass raking head 4 thereon is separated from the ground; when the lifting frame 2 rises to a preset height, the lifting frame 2 is automatically hooked with the main support frame 1; at this time, the controller turns off the lifting drive motor 5 to keep the position of the lifting frame 2 stable by hooking. When the grass raking machine arrives at a designated location to perform grass raking operations, the lifting frame 2 is unlocked from the main support frame 1, and the lifting drive motor 5 is started to flip, so that the lifting frame 2 is lowered to a preset height, and the grass raking head 4 contacts the grass on the ground; the two telescopic frames 3 are slid to change their extended lengths, and the front and rear distances of the grass raking heads 4 are adjusted.

[0062] The present invention provides a raking head lifting control device for a grass raking machine, which realizes the 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 to reduce the load of the lifting drive motor 5, and prevent the drive motor 5 from being damaged due to 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.

[0063] Embodiment 2:

[0064] On the basis of the above-mentioned embodiment 1, the main support frame 1 includes: a vertical rod 11, a support rod 12 and a support roller 13, the support roller 13 is installed on the traction equipment, the two vertical rods 11 are connected to the front and rear ends of the support roller 13; the two support rods 12 are symmetrically connected to the left and right sides of the vertical rod 11; the lifting drive motor 5 is installed at the end of the support rod 12.

[0065] Lifting frame 2 includes:

[0066] A first frame 21, one end of the first frame 21 is hinged to the vertical rod 11;

[0067] 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;

[0068] The third frame 23 is configured as an arc frame, and the bottom end of the third frame 23 is connected to the end of the first frame 21 .

[0069] The output end of the lifting drive motor 5 is connected to a gear 14 . The third frame 23 is provided with an arc-shaped transmission tooth groove 24 . The gear 14 is meshedly connected in the transmission tooth groove 24 .

[0070] The working principle and beneficial effects of the above technical solution are:

[0071] The main support frame 1 provides support for the lifting frame 2. When the mowing head 4 needs to be lifted, the controller starts the lifting drive motor 5 to rotate forward, so that the gear 14 at its output end rotates accordingly. The gear 14 meshes with the transmission tooth groove 24 to drive the third frame 23 to move upward, and the third frame 23 pulls the first frame 21 below to move upward; under the lifting action of the two first frames 21, the second frame 22 also moves upward, driving the mowing head 4 to rise, that is, the lifting action of the mowing head 4 is realized. When the mowing head 4 needs to be lowered, the controller starts the lifting drive motor 5 to flip, so that the gear 14 rotates in the opposite direction, drives the third frame 23 and the first frame 21 to move downward, and drives the second frame 22 and the mowing head 4 to move downward.

[0072] 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 to reduce the load of the lifting drive motor 5. At the same time, the consistency of the lifting action of the unilateral raking head 4 is improved, and the control difficulty is reduced.

[0073] Embodiment 3:

[0074] 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. The telescopic frame 3 is provided with a through hole. 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.

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

[0076] The second frame 22 is provided with a telescopic slot 25, and the telescopic slot 25 is inclined so that the grass raking heads 4 on the telescopic frame 3 are arranged in a staggered manner, so that the grass on the outside is gradually gathered in the center of the device during the grass raking process. The telescopic frame 3 is slid forward and backward along the telescopic slot 25 to adjust the distance between the front and rear grass raking heads 4 to a preset value to adapt to different grass raking operation areas and operation modes; then the through hole of the grass raking head 4 is connected to the corresponding limit hole 26 by bolts, thereby fixing the position of the grass raking head 4.

[0077] Embodiment 4:

[0078] On the basis of the above-mentioned embodiment 2, the mowing head lifting control device of the mower further 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, and 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.

[0079] The working principle and beneficial effects of the above technical solution are:

[0080] 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 goes deep into the hooking seat 7 and contacts the pressure sensor 8 in the hooking seat 7. When the 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 setting of the pressure sensor 8 provides a basis for the start and stop control of the lifting drive motor 5. At the same time, according to the pressure detection result, it can timely identify the situation that the hooking rod 7 cannot reach the preset position, which is convenient for inspection and maintenance.

[0081] Embodiment 5:

[0082] On the basis of the above-mentioned embodiment 4, the hook rod 7 comprises:

[0083] Sliding grooves 31, two sliding grooves 31 are symmetrically arranged on both sides of the hook rod 7 and are connected at the center;

[0084] 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;

[0085] The hook claw 34 is connected to the extended end of the sliding frame 32 , and the two hook claws 34 are arranged on the opposite sides of the two sliding frames 32 .

[0086] The working principle and beneficial effects of the above technical solution are:

[0087] 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, so that the two sliding frames 32 move toward 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 to achieve 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 achieved.

[0088] Embodiment 6:

[0089] On the basis of the above-mentioned embodiment 5, the mounting seat 6 comprises:

[0090] Hydraulic cylinder 35, two hydraulic cylinders 35 are symmetrically arranged on both sides of the cavity of the mounting seat 6, and the hydraulic cylinder 35 is electrically connected to the controller;

[0091] 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 unfolded state;

[0092] A limit block 37, which is connected to one side of the cavity of the mounting seat 6 close to the mounting rod 7, and the limit block 37 is arranged corresponding to the mounting claw 34;

[0093] The conical opening 38 is connected to a side of the cavity of the hanging seat 6 close to the hanging rod 7 .

[0094] The working principle and beneficial effects of the above technical solution are:

[0095] 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 cavity of the hooking seat 6 until the pressure sensor 8 at the end of the hooking claw 34 contacts the cavity of the hooking seat 6. When the pressure sensor When the pressure signal detected by 8 reaches the preset value, it indicates that the hooking rod 7 reaches the preset position. At this time, the hooking seat 34 is completely located in the cavity of the hooking 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 hooking rod 7 to move downward, so that the hooking claw 34 is clamped on the limit block 37, thereby realizing the hooking of the hooking rod 7 and the hooking seat 6.

[0096] 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 with the cavity of the hook seat 6 again. At this time, the two hydraulic cylinders 35 are started to extend, push the pressure plate 36 to extend inward, and squeeze the hook claw 34 to move closer to 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.

[0097] 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, in the hooking 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 a moving space for the hook claw 34, reducing the risk of the hook claw 34 breaking when it is vibrated due to excessive connection stiffness; and During the vibration process, since the two hooking claws 34 are unfolded under the action of the spring 33, the distance between them is greater than the distance at the entrance of the hooking 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.

[0098] Embodiment 7:

[0099] On the basis of the above-mentioned embodiment 2, the grass raking head lifting control device of the grass raking machine further includes a dust control unit, and the dust control unit includes:

[0100] A support roller 41, the support roller 41 is connected between the front and rear vertical rods 11;

[0101] A dust screen 42, the two ends of the dust screen 42 are connected to the two second frames 22 and the middle part surrounds the bottom of the 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;

[0102] The particle sensor is arranged on the vertical rod 11 and is located above the dust shield 42 .

[0103] The working principle and beneficial effects of the above technical solution are:

[0104] When the mower is in operation, the rapid rotation of the mowing head 4 will generate a large amount of dust. The floating dust will enter the lifting control device and affect the movement of the various components of the device. On the other hand, the dust will affect the working environment and the sight 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 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 reduced, the height of the two sides of the dust screen 42 is close to 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 the dust fall back to the ground, which helps to maintain the cleanliness of the upper transmission components and ensure the normal lifting process.

[0105] Embodiment 8:

[0106] Based on the above embodiment 7, the dust control unit further includes:

[0107] 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;

[0108] The two guide fans 44 are rotatably disposed at the center of the bearing plate 43;

[0109] A first pulley 45, the first pulley 45 is connected to the top of the rotating shaft of the guide fan 44;

[0110] 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;

[0111] 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 support roller 41;

[0112] 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 then is connected to the first pulley 45 .

[0113] The working principle and beneficial effects of the above technical solution are:

[0114] When the grass mower is in use, the particle concentration on the upper part of the device is detected by a 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 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 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 barrier net 42. The dust is suppressed downward by the airflow pressure, thereby 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 thereon are enlarged; at the same time, the motor 47 is started, and the motor 47 drives the guide fan 44 to rotate, conveying the airflow from the top of the device downward and flowing through the dust screen 42 to clean the accumulated dust on the dust screen 42 for use in subsequent operations; at the same time, the supporting roller 41 rotates, and the protrusion on the supporting rod 41 knocks the dust screen 42, causing the accumulated dust on the dust screen 42 to vibrate, making it easier to clean under the action of the airflow.

[0115] Through the above-mentioned structural design, a dust control unit is integrated on the raking head lifting control device. During the operation of the raking machine, the dust is controlled below the dust blocking net 42 through the combined effect of the dust blocking net 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 to the workers' vision during operation; when the raking operation is not in progress, the dust blocking net 42 can be cleaned in time, so that the dust blocking net 42 can block the dust particles while ensuring that the airflow can pass through the holes.

[0116] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0117] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0118] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the 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 the 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 arranged 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 is used to control the start and stop of the lifting drive motor (5).

2. The raking head lifting control device of a raking machine according to claim 1, characterized in that: The main support frame (1) comprises: a vertical rod (11), a support rod (12) and a support roller (13); the support roller (13) is installed on the traction equipment; the two vertical rods (11) are connected to the front and rear ends of the 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).

3. The raking head lifting control device of a raking machine according to claim 2, characterized in that: 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); 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).

4. The grass rake head lifting control device of the grass rake according to claim 3, 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 meshedly connected in the transmission tooth groove (24).

5. The grass rake head lifting control device of the grass rake according to claim 3, characterized in that: The second frame body (22) comprises a telescopic slot (25), a limiting hole (26) and a limiting bolt (27); the telescopic slot (25) is arranged outside 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); the telescopic frames (3) are provided with through holes; 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 holes and is screwed to any one of the limiting holes (26).

6. The raking head lifting control device of a raking machine according to claim 3, characterized in that: The device also comprises a hanging unit, which comprises a hanging seat (6) and a hanging rod (7), wherein 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), and a pressure sensor (8) is arranged 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.

7. The raking head lifting control device of a raking machine according to claim 6, characterized in that: The hook rod (7) comprises: Sliding grooves (31), two sliding grooves (31) are symmetrically arranged on both sides of the hanging rod (7) and are connected at the center; A sliding frame (32), the sliding frame (32) is slidably arranged 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), and a pressure sensor (8) is connected to the extended end of the sliding frame (32); A hooking claw (34) is connected to the protruding end of the sliding frame (32), and the two hooking claws (34) are arranged on the opposite sides of the two sliding frames (32).

8. The raking head lifting control device of a raking machine according to claim 7, characterized in that: The mounting seat (6) comprises: 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; A pressing plate (36), the pressing plate (36) is connected to the output end of the hydraulic cylinder (35), and the maximum distance between the two pressing plates (36) is greater than the maximum distance between the two hooking claws (34) in the unfolded state; A limit block (37), the limit block (37) is connected to a side of the cavity of the hanging seat (6) close to the hanging rod (7), and the limit block (37) and the hanging claw (34) are arranged correspondingly; The conical opening (38) is connected to a side of the cavity of the hanging seat (6) close to the hanging rod (7).

9. The grass rake head lifting control device of the grass rake according to claim 3, characterized in that: It also includes a dust control unit, which includes: A support roller (41), the support roller (41) is connected between the front and rear vertical rods (11), and a plurality of protrusions are evenly arranged on the support roller (41); A dust-blocking net (42), the two ends of the dust-blocking net (42) are connected to the two second frames (22) and the middle part surrounds the bottom of the support roller (41), the dust-blocking net (42) is elastic, and the holes of the dust-blocking net (42) expand when the dust-blocking net (42) is stretched; A particle sensor is arranged on the vertical rod (11) and is located above the dust shield (42).

10. The raking head lifting control device of a raking machine according to claim 9, 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 bearing 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 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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