An electric height adjustment system and control method for a riding lawn mower

Abstract

The present invention relates to the technical field of riding lawn mowers, and in particular to an electric height adjustment system and a control method for a riding lawn mower. The present invention sets the electric height adjustment system, and the piston rod of a push rod motor is extended and retracted to drive a rotating arm to realize a rotating action. A control and display component provides a signal for the forward and reverse rotation of the push rod motor, thereby controlling the extension and retraction of the push rod motor. Driven by the rotating arm, the third connecting rod becomes an active component, and the second connecting rod and the first connecting rod are passive components, and play a supporting role at the same time, so as to complete the lifting and lowering of a cutting blade system. The control and display component is also used to display the gear position and the corresponding blade height. The power required for adjusting the height of the chassis is provided by a reciprocating push rod motor, thereby replacing human drive, and adjusting the position of the cutting blade is more convenient. At the same time, the control and display component feeds back the height and gear position of the chassis in real time, and the operation is simple and the display is clear, thereby improving the convenience and comfort of adjusting the gear position of the cutting blade of the riding lawn mower.

Description

Technical Field

[0001] The invention relates to the technical field of riding lawn mowers, in particular to an electric height adjustment system and a control method for riding lawn mowers. Background Art

[0002] A riding lawn mower is a large-scale lawn mowing machine. Compared with conventional hand-pushed lawn mowers, it has the advantages of high efficiency, fast mowing, and labor saving when mowing a larger area of ​​lawn.

[0003] However, since the whole machine is too large, it also brings certain troubles to operate some functions, such as machine control, gear adjustment of the cutting knife chassis, etc.

[0004] In particular, the existing riding lawn mowers usually adjust the position of the cutter chassis by manually driving the mechanical structure, the cutter chassis is heavy, and the gear adjustment is laborious and inconvenient. Summary of the invention

[0005] The object of the present invention is to provide an electric height adjustment system and control method for a riding lawn mower to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: an electric height adjustment system for a riding lawn mower, including a frame system, an electric height adjustment system and a cutting blade system. The electric height adjustment system includes a push rod motor, a rotating arm and a control and display assembly. The push rod motor is fixedly mounted on the frame system through a fixing member, the rotating arm is fixed to the piston rod end of the push rod motor through a bracket, the rotating arm is rotatably connected to the frame system through a connecting member, the control and display assembly is used to control the stroke of the push rod motor and display the gear position and the corresponding blade height, and the cutting blade system is compatible with the electric height adjustment system.

[0007] Preferably, the cutting knife system includes a connecting rod and a cutting knife chassis, the connecting rod includes a first connecting rod, a second connecting rod and a third connecting rod, both ends of the first connecting rod are rotatably connected to the frame system and one side of the cutting knife chassis respectively, one end of the second connecting rod and the third connecting rod are rotatably connected to the other side of the cutting knife chassis, the other end of the second connecting rod is rotatably connected to the frame system, and the other end of the third connecting rod is rotatably connected to the rotating arm.

[0008] Preferably, the control and display assembly includes a switch module, a display module and a control module. The switch module and the display module are electrically connected to the control module through lines. The control module is electrically connected to the push rod motor through lines. One side of the control module is electrically connected to a battery module through lines, and the battery module is electrically connected to the push rod motor.

[0009] Preferably, the push rod motor is located at one side of the frame system, and the bracket for rotationally connecting the rotating arm to the piston rod of the push rod motor is located at one end of the rotating arm.

[0010] Optionally, the push rod motor is located in the middle of the frame system, and the bracket that is rotatably connected to the rotating arm and the piston rod of the push rod motor is located in the middle of the rotating arm.

[0011] Preferably, the control module is composed of a DC-DC module, a motor encoder module, a button module, a CAN communication module, a motor drive module, a one-line display module and an MCU module; the DC-DC module, the motor encoder module and the button module are all electrically connected to the MCU module; and the CAN communication module, the motor drive module and the one-line display module are all electrically connected to the MCU module.

[0012] Preferably, the fixing member includes a first motor bracket and a second motor bracket, both of which are fixed to the frame system, and both of which are fixed to the push rod motor by bolts, and the connecting member includes a bushing and a rotating shaft fixing sleeve, the bushing is fixed to the frame system, the bushing is rotatably sleeved at the end of the rotating arm, and the rotating shaft fixing sleeve is fixed and clamped to the outside of the bushing by bolts.

[0013] An electric height control method for a riding lawn mower comprises the following steps:

[0014] Step 1: Read device information;

[0015] Step 2: Display according to the read information;

[0016] Step 3. Use the buttons to adjust the gear position;

[0017] Step 4: Display the adjusted gear position;

[0018] Step 5: Reset when the position is at the highest or lowest, return the position to zero when the position is at the highest or lowest, and re-run part of step 1 after the position is returned to zero and at other positions.

[0019] Preferably, step 1 comprises:

[0020] Step 11, read the gear position in the MCU module Flash;

[0021] Step 12: Read the battery pack power;

[0022] Step 13: Read the vehicle information.

[0023] Preferably, step 3 comprises:

[0024] Step 31, determine whether there is a key input, if there is no input, re-execute step 12, if there is input, execute the next step;

[0025] Step 32: Update the target location;

[0026] Step 33, enabling the motor to reach the target position;

[0027] Step 34: Save the reached position information into the Flash of the MCU module.

[0028] The present invention provides an electric height adjustment system and control method for a riding lawn mower through improvement, which has the following improvements and advantages compared with the prior art:

[0029] First, the present invention sets up an electric height adjustment system, the piston rod of the push rod motor is extended and retracted to drive the rotating arm to realize the rotating action, the control and display component provides signals for the forward and reverse rotation of the push rod motor, so as to control the extension and retraction of the push rod motor, and the control and display component is also used to display the gear position and the corresponding blade height, and the reciprocating push rod motor is used to provide the power required for the chassis height adjustment, thereby replacing the human drive, and it is more convenient to adjust the cutting knife position. At the same time, the control and display component feeds back the height and gear position of the chassis in real time, the operation is simple, the display is clear, and the convenience and comfort of the cutting knife gear adjustment of the riding lawn mower are improved;

[0030] Secondly, the present invention arranges the first connecting rod, the second connecting rod and the third connecting rod. The third connecting rod rotates and rises or falls at the same time under the drive of the rotating arm. The second connecting rod rotates at the same time. When the third connecting rod drags the cutting knife chassis up and down, it plays a supporting role of pushing backward. The first connecting rod rotates at the same time and plays an auxiliary supporting role in the rising and falling process of the cutting knife chassis. The cutting knife system is suspended by three points. Under the action of the push rod motor and driven by the rotating arm, the third connecting rod becomes the active part, and the second connecting rod and the first connecting rod are passive parts, which play a supporting role at the same time to complete the lifting and lowering of the cutting knife system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0032] Figure 1 is a schematic diagram of the overall three-dimensional structure of Example 1 of the present invention;

[0033] Figure 2 is a schematic diagram of the three-dimensional structure of the frame system of Example 1 of the present invention;

[0034] Figure 3 yes Figure 2 A magnified view of the structure at center;

[0035] Figure 4 is a schematic diagram of a partial structure of a frame system according to Embodiment 1 of the present invention;

[0036] Figure 5 is a schematic diagram of the three-dimensional structure of the electric height adjustment system of Example 1 of the present invention;

[0037] Figure 6 is a schematic diagram of the three-dimensional structure of the cutting knife system of embodiment 1 of the present invention;

[0038] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection between the cutting knife system and the rotating arm of Example 1 of the present invention;

[0039] Figure 8 is a structural block diagram of a control module of Embodiment 1 of the present invention;

[0040] Fig. 9 is a flow chart of the control method of the present invention;

[0041] Fig.10 is a schematic diagram of the overall three-dimensional structure of Embodiment 2 of the present invention;

[0042] Fig.11 is a schematic diagram of the three-dimensional structure of the frame system and the push rod motor of Example 2 of the present invention;

[0043] Fig.12 It is a comparison diagram of two kinds of rotating arms in Example 1 and Example 2 of the present invention (rotating arm 1 is the rotating arm in Example 1, and rotating arm 2 is the rotating arm in Example 2).

[0044] Description of reference numerals:

[0045] 100, frame system; 101, first motor bracket; 102, second motor bracket; 103, bushing; 104, rotating shaft fixing sleeve;

[0046] 200, electric height adjustment system; 201, push rod motor; 202, rotating arm; 203, switch module; 204, display module; 205, control module; 206, battery module;

[0047] 300, cutting knife system; 301, first connecting rod; 302, second connecting rod; 303, third connecting rod; 304, cutting knife chassis. DETAILED DESCRIPTION

[0048] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present invention provides an electric height adjustment system and control method for a riding lawn mower through improvement. The technical solution of the present invention is:

[0050] Example 1

[0051] like Figure 1-Figure 9As shown, an electric height adjustment system and control method for a riding lawn mower mainly include two parts: an electric height adjustment system for a riding lawn mower and an electric height adjustment control method for a riding lawn mower.

[0052] Among them, an electric height adjustment system for a riding lawn mower includes a frame system 100, an electric height adjustment system 200 and a cutting blade system 300, the electric height adjustment system 200 includes a push rod motor 201, a rotating arm 202 and a control and display assembly, the push rod motor 201 is fixedly installed on the frame system 100 through a fixing member, the fixing member includes a first motor bracket 101 and a second motor bracket 102, the first motor bracket 101 and the second motor bracket 102 are both fixed on the frame system 100, and the first motor bracket 101 and the second motor bracket 102 are connected to the push rod motor 201 through bolts. 1 is fixed, the rotating arm 202 is fixed to the piston rod end of the push rod motor 201 through a bracket, the rotating arm 202 is rotatably connected to the frame system 100 through a connecting piece, the connecting piece includes a bushing 103 and a rotating shaft fixing sleeve 104, the bushing 103 is fixed to the frame system 100, the bushing 103 is rotatably sleeved on the end of the rotating arm 202, and the rotating shaft fixing sleeve 104 is fixed and clamped on the outer side of the bushing 103 by bolts, the control and display component is used to control the stroke of the push rod motor 201 and display the gear position and the corresponding blade height, and the cutting knife system 300 is adapted to the electric height adjustment system 200.

[0053] Based on the above structure, the piston rod of the push rod motor 201 is extended and retracted to drive the rotating arm 202 to realize the rotation movement. The control and display component provides signals for the forward and reverse rotation of the push rod motor 201, thereby controlling the extension and retraction of the push rod motor 201. The control and display component is also used to display the gear position and the corresponding blade height. The reciprocating push rod motor 201 is used to provide the power required for chassis height adjustment, thereby replacing human drive, and adjusting the cutting knife position is more convenient. At the same time, the control and display component provides real-time feedback on the height and gear position of the chassis. The operation is simple and the display is clear, which improves the convenience and comfort of the cutting knife gear adjustment of the riding lawn mower.

[0054] Furthermore, the cutter system 300 includes a connecting rod and a cutter chassis 304, the connecting rod includes a first connecting rod 301, a second connecting rod 302 and a third connecting rod 303, both ends of the first connecting rod 301 are rotatably connected to the frame system 100 and one side of the cutter chassis 304, the second connecting rod 302 and one end of the third connecting rod 303 are rotatably connected to the other side of the cutter chassis 304, the other end of the second connecting rod 302 is rotatably connected to the frame system 100, and the other end of the third connecting rod 303 is rotatably connected to the rotating arm 202. The third connecting rod 303 is rotatably connected to the rotating arm 202. The cutting knife system 300 is suspended at three points. Under the action of the push rod motor 201 and driven by the rotating arm 202, the third connecting rod 303 becomes the active part, and the second connecting rod 302 and the first connecting rod 301 are passive parts, which play a supporting role at the same time to complete the lifting and lowering of the cutting knife system.

[0055] Furthermore, the control and display component includes a switch module 203, a display module 204 and a control module 205. The switch module 203 and the display module 204 are electrically connected to the control module 205 through a line. The control module 205 is electrically connected to the push rod motor 201 through a line. A battery module 206 is electrically connected to one side of the control module 205 through a line. The battery module 206 is electrically connected to the push rod motor 201. The battery module 206 provides power for the push rod motor 201. The control module 205 is used to control the extension and retraction of the piston rod of the push rod motor 201. A self-resetting switch is used in the switch module 203. The two forward and backward actions provide signals for the forward and reverse rotation of the push rod motor 201 through the control module 205, thereby realizing the extension and retraction action of the piston rod of the push rod motor 201. The display module 204 displays the gear position and the corresponding blade height in real time.

[0056] Furthermore, the push rod motor 201 is located on one side of the frame system 100, and the bracket for rotationally connecting the rotating arm 202 and the piston rod of the push rod motor 201 is located at one end of the rotating arm 202. The push rod motor 201 is placed on the side, which is suitable for a battery module 206 with a large volume, which is assembled in the middle of the frame. The battery module 206 is electrically connected to the push rod motor 201, and the battery module 206 and the push rod motor 201 are electrically connected and occupy a large space in the middle of the frame system 100. At the same time, in order to adapt to the structural characteristics of the push rod motor 201 itself, and the working scene of the lawn mower being relatively bumpy when in use, the first motor bracket 101 and the second motor bracket 102 are used to fix the push rod motor 201 together, so as to enhance the working stability of the push rod motor 201 and withstand the impact caused by the bumps.

[0057] Furthermore, the control module 205 is composed of a DC-DC module, a motor encoder module, a button module, a CAN communication module, a motor drive module, a one-line display module and an MCU module. The DC-DC module, the motor encoder module and the button module are all electrically connected to the MCU module, and the CAN communication module, the motor drive module and the one-line display module are all electrically connected to the MCU module.

[0058] It should be noted that the control module 205 divides the total stroke into 12 sections and 13 gears, and adjusts the gear according to the trigger of the button module. After the gear stroke action is completed, the position will be recorded in the Flash of the MCU module. The gear position will be directly displayed when the power is turned on next time. There is no need to return to the zero position during use. The position will be automatically calibrated when the electric height adjustment is in the highest and lowest positions.

[0059] An electric height control method for a riding lawn mower comprises the following steps:

[0060] Step 1: Read device information, including:

[0061] Step 11, read the gear position in the MCU module Flash;

[0062] Step 12: Read the battery pack power;

[0063] Step 13: Read vehicle information;

[0064] Step 2: Display according to the read information;

[0065] Step 3: Use the buttons to adjust the gear position, including:

[0066] Step 31, determine whether there is a key input, if there is no input, re-execute step 12, if there is input, execute the next step;

[0067] Step 32: Update the target location;

[0068] Step 33, enabling the motor to reach the target position;

[0069] Step 34, save the reached position information to the Flash of the MCU module;

[0070] Step 4: Display the adjusted gear position;

[0071] Step 5, reset when the position is at the highest or lowest, return the position to zero when the position is at the highest or lowest, and re-run part of step 1 after the position is returned to zero and at other positions, specifically including step 12 and step 13.

[0072] Example 2

[0073] like Figure 10-12As shown, an electric height adjustment system and control method for a riding lawn mower is different from Example 1 in that:

[0074] The push rod motor 201 is located in the middle of the frame system 100, and the bracket for the rotating arm 202 and the piston rod of the push rod motor 201 is rotatably connected is located in the middle of the rotating arm 202;

[0075] The two arrangements of the push rod motor 201 have different structures of the corresponding rotating arms 202 and different positions of the brackets directly connected to the push rod motor 201. The two rotating arms 202 are fixed in the same position and manner on the frame system 100, and both drive the rise and fall of the cutter chassis 304 through rotational motion, thereby adjusting the position of the cutter;

[0076] The push rod motor 201 is front-mounted, which is suitable for a battery module 206 with a smaller overall volume or a rear-mounted battery module 206. The battery module 206 is electrically connected to the push rod motor 201. There is a larger space in the middle of the frame system 100 to arrange the push rod motor 201. Through two different arrangements, it can effectively adapt to the requirements of carrying battery modules 206 of different sizes and electrically connecting the battery module 206 to the push rod motor 201, so that it is more flexible and convenient during use.

[0077] Working principle: In daily use, the piston rod of the push rod motor 201 is extended and retracted to drive the rotating arm 202 to realize the rotation action. The control module 205 is used to control the extension and retraction of the piston rod of the push rod motor 201. The switch module 203 uses a self-resetting switch. The front and rear actions provide signals for the forward and reverse rotation of the push rod motor 201 through the control module 205, thereby realizing the extension and retraction action of the piston rod of the push rod motor 201. When the push rod motor 201 is extended and retracted, it drives the rotating arm 202 to rotate. The third connecting rod 303 rotates and rises or falls at the same time under the drive of the rotating arm 202. The second connecting rod 302 rotates at the same time. When the third connecting rod 303 drags the cutting knife chassis 304 up and down, it plays a supporting role in pushing backwards. The first connecting rod 301 rotates at the same time The cutting blade chassis 304 rotates during the lifting and lowering process, and plays an auxiliary supporting role; the cutting blade system 300 is suspended by three points, and under the action of the push rod motor 201, it is driven by the rotating arm 202, and the third connecting rod 303 becomes the active part, and the second connecting rod 302 and the first connecting rod 301 are passive parts, and play a supporting role at the same time, so as to complete the lifting and lowering of the cutting blade system. The display module 204 displays the gear position and the corresponding blade height in real time, and provides the power required for the chassis height adjustment through the reciprocating push rod motor 201, thereby replacing the human drive, and adjusting the cutting blade position is more convenient. At the same time, the display module 204 provides real-time feedback on the height and gear position of the chassis, which is simple to operate and clear to display, thereby improving the convenience and comfort of the cutting blade gear adjustment of the riding lawn mower.

[0078] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric height adjustment system for a riding lawn mower, characterized in that: The invention comprises a frame system (100), an electric height adjustment system (200) and a cutting knife system (300), wherein the electric height adjustment system (200) comprises a push rod motor (201), a rotating arm (202) and a control and display assembly, wherein the push rod motor (201) is fixedly mounted on the frame system (100) via a fixing member, the rotating arm (202) is fixed to the piston rod end of the push rod motor (201) via a bracket, the rotating arm (202) is rotatably connected to the frame system (100) via a connecting member, the control and display assembly is used to control the stroke of the push rod motor (201) and to display the gear position and the corresponding blade height, and the cutting knife system (300) is compatible with the electric height adjustment system (200); The cutter system (300) comprises a connecting rod and a cutter chassis (304), wherein the connecting rod comprises a first connecting rod (301), a second connecting rod (302) and a third connecting rod (303), wherein both ends of the first connecting rod (301) are rotatably connected to the frame system (100) and one side of the cutter chassis (304), respectively, and one end of each of the second connecting rod (302) and the third connecting rod (303) is rotatably connected to the other side of the cutter chassis (304), the other end of the second connecting rod (302) is rotatably connected to the frame system (100), and the other end of the third connecting rod (303) is rotatably connected to the rotating arm (202); The control and display assembly comprises a switch module (203), a display module (204) and a control module (205); the switch module (203) and the display module (204) are both electrically connected to the control module (205) via a circuit; the control module (205) is electrically connected to the push rod motor (201) via a circuit; one side of the control module (205) is electrically connected to a battery module (206) via a circuit; and the battery module (206) is electrically connected to the push rod motor (201); The push rod motor (201) is located at one side of the frame system (100), and a bracket rotatably connected to the piston rod of the push rod motor (201) of the rotating arm (202) is located at one end of the rotating arm (202); The fixing member comprises a first motor bracket (101) and a second motor bracket (102); the first motor bracket (101) and the second motor bracket (102) are both fixed to the frame system (100); the first motor bracket (101) and the second motor bracket (102) are both fixed to the push rod motor (201) by bolts; the connecting member comprises a bushing (103) and a rotating shaft fixing sleeve (104); the bushing (103) is fixed to the frame system (100); the bushing (103) is rotatably sleeved on the end of the rotating arm (202); and the rotating shaft fixing sleeve (104) is fixedly clamped to the outside of the bushing (103) by bolts.

2. The electric height adjustment system for a riding lawn mower according to claim 1, characterized in that: The push rod motor (201) is located in the middle of the frame system (100), and the bracket for rotationally connecting the rotating arm (202) and the piston rod of the push rod motor (201) is located in the middle of the rotating arm (202).

3. The electric height adjustment system for a riding lawn mower according to claim 1, characterized in that: The control module (205) is composed of a DC-DC module, a motor encoder module, a key module, a CAN communication module, a motor drive module, a one-line display module and an MCU module. The DC-DC module, the motor encoder module and the key module are all electrically connected to the MCU module. The CAN communication module, the motor drive module and the one-line display module are all electrically connected to the MCU module.

4. An electric height control method for a riding lawn mower, applied to an electric height control system for a riding lawn mower as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Read device information; Step 2: Display according to the read information; Step 3. Use the buttons to adjust the gear position; Step 4: Display the adjusted gear position; Step 5: Reset when the position is at the highest or lowest, return the position to zero when the position is at the highest or lowest, and re-run part of step 1 after the position is returned to zero and at other positions.

5. The electric height control method for a riding lawn mower according to claim 4, characterized in that: The step 1 comprises: Step 11, read the gear position in the MCU module Flash; Step 12: Read the battery pack power; Step 13: Read the vehicle information.

6. The electric height control method for a riding lawn mower according to claim 4, characterized in that: The step 3 comprises: Step 31, determine whether there is a key input, if there is no input, re-execute step 12, if there is input, execute the next step; Step 32: Update the target location; Step 33, enabling the motor to reach the target position; Step 34: Save the reached position information into the Flash of the MCU module.

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