Lawn mower

Abstract

The lawn mower comprises a lawn mower body, a single pull rod assembly and a control unit, one end of the single pull rod assembly is connected with the lawn mower body, the other end of the single pull rod assembly is connected with the control unit, the control unit is suitable for controlling starting, stopping and movement of the lawn mower body, and the control unit comprises a panel body, a holding part and a connecting part; the holding parts are arranged on the two sides of the panel body, and the connecting part is detachably connected with the single pull rod assembly. The mower adopts the single-pull-rod assembly, when the single-pull-rod assembly stretches and folds, only one locking piece on a rod body of the single-pull-rod assembly needs to be unlocked, the single-pull-rod assembly stretches and retracts more conveniently, the rod is not prone to being clamped in the stretching and retracting process, the single-pull-rod assembly is rotationally connected to the mower body, and the single-pull-rod assembly can be rotationally folded so that the single-pull-rod assembly and the control unit can be attached to the mower body; and the space occupied by the mower is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to garden tools, in particular to a lawn mower. BACKGROUND

[0002] The lawn mower is a commonly used garden power tool, which generally comprises a base, a power unit mounted on the base and a cutting blade, and the lawn mower drives the cutting blade to rotate by the power unit to perform cutting operation. The lawn mower is provided with a push-pull rod for pushing, and the push-pull rod of the lawn mower generally occupies a relatively large space, so the push-pull rod is usually set to be telescopic and rotatable and foldable, so that when the lawn mower is stored, the push-pull rod can be telescoped and folded to reduce the space required by the lawn mower.

[0003] However, the push-pull rod in the existing lawn mower is mostly a double-pull rod structure, for example, the lawn mower disclosed in the announcement No. CN105960950B, "a lawn mower, a push rod control assembly comprises a self-propelled pull rod, a self-propelled pull cable, a self-propelled power cord and a second operation member", the self-propelled pull rod in the lawn mower is a double-pull rod structure, and the self-propelled pull rod is in the shape of U, which needs to be unlocked first when telescoping, and then telescoped and folded, and when telescoping, the two rod bodies are telescoped to different degrees, which is easy to cause the problem of rod jamming. SUMMARY

[0004] One purpose of the present application is to provide a lawn mower with a push-pull rod that is easy to fold, so as to solve the problem of the existing double-pull rod structure that is difficult to telescope and fold.

[0005] To achieve the above purpose, the technical solution adopted by the present application is as follows: a lawn mower, comprising a lawn mower body, a single-pull rod assembly and a control unit, one end of the single-pull rod assembly is connected with the lawn mower body, the other end of the single-pull rod assembly is connected with the control unit, the control unit is adapted to control the start and stop and movement of the lawn mower body, the control unit comprises a panel body, a holding part and a connecting part, the holding part is arranged on both sides of the panel body, and the connecting part is detachably connected with the single-pull rod assembly.

[0006] As a preferred, the panel body is provided with a power switch and a cutter disc switch, the cutter disc switch is arranged on both sides of the panel body and extends below the holding part, the power switch and the cutter disc switch are adapted to cooperatively control the start and stop of the cutter disc assembly on the lawn mower body, and the holding part is further provided with a self-propelled switch, and the self-propelled switch is adapted to control the movement of the lawn mower body.

[0007] As another preferred, the single-pole assembly comprises an upper pole connected with the mower body and a lower pole connected with the control unit, the upper pole is telescopically inserted into the lower pole, a locking member is arranged at the joint of the upper pole and the lower pole, the locking member is adapted to lock or unlock the upper pole and the lower pole, the single-pole assembly is foldable relative to the mower body so that the control unit and the single-pole assembly are attached to the upper surface of the mower body.

[0008] Further preferably, a connecting column is arranged on the connecting portion, a connecting buckle is arranged on the connecting column, a connecting hole is arranged on the pole of the upper pole, the connecting column is telescopically inserted into the pole of the upper pole, and the connecting buckle is detachably embedded in the connecting hole.

[0009] Further, two connecting seats are arranged on the mower body, the lower pole is rotatably arranged between the two connecting seats, a first locking member is arranged on each of the two connecting seats, two second locking members are arranged on the lower pole, a lock forcing rod is further arranged in the connecting seat and the lower pole, one end of the lock forcing rod is rotatably connected with a lock forcing wrench, the other end of the lock forcing rod is threadedly connected with a lock forcing knob, the lock forcing wrench and the lock forcing knob respectively abut against one of the first locking members, when the lock forcing wrench is rotated from an unlocking position to a locking position, the lock forcing wrench and the lock forcing knob can push the first locking member to cooperate with the second locking member to limit the rotation of the single-pole assembly relative to the mower body.

[0010] Further, a lock forcing end cover is arranged on the first locking member at the side of the lock forcing wrench, the lock forcing end cover is provided with a lock forcing groove in communication with the outside, the lock forcing groove is adapted to the lock forcing wrench, and the lock forcing wrench is embedded in the lock forcing groove to limit the circumferential rotation of the lock forcing wrench.

[0011] Further, a first engaging tooth is arranged on the first locking member, and a second engaging tooth is arranged on the second locking member, when the first locking member cooperates with the second locking member, the first engaging tooth engages with the second engaging tooth, and the number of the first engaging tooth and the second engaging tooth is 30-60.

[0012] Further, a reset member is arranged between the first locking member and the second locking member, the reset member is adapted to continuously apply force to the first locking member so that the first locking member can automatically separate from the second locking member after the lock forcing wrench is rotated from the locking position to the unlocking position.

[0013] Further, a limiting cross rod is arranged on the mower body, and the limiting cross rod is adapted to limit the maximum folding position of the single-pole assembly by abutting against the single-pole assembly, so that the single-pole assembly in the maximum folding position is arranged horizontally.

[0014] Further, a connecting wire is arranged in the single-pole assembly, and two ends of the connecting wire extend out of the single-pole assembly and are respectively plug-connectable to the mower body and the control unit.

[0015] Compared with the prior art, the mower has the following beneficial effects:

[0016] (1) The mower adopts the single-pole assembly, and only one locking piece on the pole body of the single-pole assembly needs to be unlocked when the single-pole assembly is folded, so that the single-pole assembly is more convenient to fold and is less likely to be stuck, the single-pole assembly is rotatably connected to the mower body, and the single-pole assembly and the control unit are attached to the mower body when the single-pole assembly is folded, thereby reducing the space required by the mower;

[0017] (2) The single-pole assembly and the mower body are locked and unlocked by the locking lever, the first locking piece and the second locking piece, the locking effect is good, the angle range of the single-pole assembly is large, and the locking and unlocking operations are very convenient;

[0018] (3) The mower body, the single-pole assembly and the control unit are modularized, the single-pole assembly is detachably mounted on the mower body, and the control unit is detachably mounted on the single-pole assembly, so that when a component is damaged, the component can be replaced alone, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of the mower of the present application.

[0020] Figure 2 FIG. 2 is an exploded structural schematic view of the single-pole assembly of the mower of the present application.

[0021] Figure 3 FIG. 3 is a structural schematic view of the locking piece of the mower of the present application.

[0022] Figure 4 FIG. 4 is a structural schematic view of the connecting seat, the single-pole assembly and the control unit of the mower of the present application.

[0023] Figure 5 FIG. 5 is an exploded structural schematic view of the connecting seat, the first locking piece and the locking end cover of the mower of the present application.

[0024] Figure 6 FIG. 6 is a structural schematic view of the locking lever, the locking knob and the locking wrench of the mower of the present application.

[0025] Figure 7 Figure 6 is a schematic view of the cooperation between the lower pull rod and the connecting seat when the lock lever of the lawn mower in the application is in the locked position.

[0026] Figure 8 Figure 7 is a schematic view of the cooperation between the lower pull rod and the connecting seat when the lock lever of the lawn mower in the application is in the unlocked position.

[0027] Figure 9 Figure 8 is a schematic view of the single pull rod assembly of the lawn mower in the application in the folded position.

[0028] Figure 10 Figure 9 is an exploded schematic view of the structure of the upper pull rod and the control unit of the lawn mower in the application.

[0029] Figure 11 Figure 10 is a schematic view of the structure of the control unit of the lawn mower in the application.

[0030] Figure 12 Figure 11 is a schematic view of the structure of the chassis height adjusting device of the lawn mower in the application.

[0031] Figure 13 Figure 12 is an enlarged schematic view of the local structure of the chassis height adjusting device of the lawn mower in the application.

[0032] Figure 14 Figure 13 is an enlarged schematic view of the local structure of the chassis height adjusting device of the lawn mower in the application from another perspective.

[0033] In the figure: 100, lawn mower body; 110, connecting seat; 111, locking through slot; 120, first locking piece; 121, locking boss; 122, first meshing tooth; 130, lock forcing end cover; 140, lock forcing groove; 150, limiting cross rod; 200, single pull rod assembly; 210, lower pull rod; 211, second lock hole; 220, upper pull rod; 221, third lock hole; 222, connecting hole; 230, locking piece; 231, lock sleeve; 232, lock catch; 233, first lock hole; 234, locking column; 240, second locking piece; 241, second meshing tooth; 300, control unit; 310, panel body; 311, power switch; 312, cutter disc switch; 313, height adjusting switch; 320, holding part; 321, self-propelled switch; 330, connecting part; 331, connecting column; 332, connecting buckle; 410, lock forcing lever; 420, lock forcing shaft; 430, lock lever; 431, lock forcing part; 4311, first end face; 4312, second end face; 432, lever part; 440, lock forcing knob; 500, chassis height adjusting device; 510, adjusting base; 520, front axle assembly; 530, rear axle assembly; 540, front support rod; 541, hinged rod; 542, first connecting rod; 543, second connecting rod; 550, rear support rod; 560, driving assembly; 570, micro switch. Detailed Implementation

[0034] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0036] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0037] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0038] like Figure 1 As shown, this application provides a lawnmower, which includes a lawnmower body 100, a single lever assembly 200, and a control unit 300. One end of the single lever assembly 200 is connected to the lawnmower body 100, and the other end of the single lever assembly 200 is connected to the control unit 300. The control unit 300 can be operated to control the start, stop, and movement of the lawnmower body 100.

[0039] Furthermore, such as Figures 2-3As shown, the single-pole assembly 200 comprises a lower pole 210 rotatably connected with the mower body 100 and an upper pole 220 detachably connected with the control unit 300, the upper pole 220 is telescopically inserted into the lower pole 210, the upper pole 220 can be extended or retracted relative to the lower pole 210, so as to adjust the length of the single-pole assembly 200, a locking member 230 is arranged at the joint of the upper pole 220 and the lower pole 210, the locking member 230 is adapted to unlock or lock the upper pole 220 and the lower pole 210. The single-pole assembly 200 can be folded relative to the mower body 100, so that the control unit 300 and the single-pole assembly 200 are attached to the mower body 100, thereby reducing the space required when the mower is stored.

[0040] The locking member 230 comprises a lock sleeve 231 arranged at the top end of the lower pole 210 and a lock buckle 232 rotatably arranged on the lock sleeve 231, the lock sleeve 231 is provided with a first lock hole 233, the pole body of the lower pole 210 is provided with a second lock hole 211, the position of the first lock hole 233 corresponds to the position of the second lock hole 211, the pole body of the upper pole 220 is provided with at least two third lock holes 221, the lock buckle 232 is provided with a locking column 234 matched with the first lock hole 233, the second lock hole 211 and the third lock hole 221, when the upper pole 220 is telescopically adjusted to any one of the third lock holes 221 corresponding to the first lock hole 233 and the second lock hole 211, the lock buckle 232 can be rotatably buckled, so that the locking column 234 is embedded in the first lock hole 233, the second lock hole 211 and the third lock hole 221, at this time, the upper pole 220 is locked, and the upper pole 220 cannot be extended or retracted relative to the lower pole 210.

[0041] Since the upper pole 220 and the lower pole 210 are both single-pole structures, only one locking member 230 is arranged on the single-pole assembly 200, when the single-pole assembly 200 is telescopically adjusted, only the unique locking member 230 needs to be unlocked, compared with the push-pull rod with a double-pole structure, the single-pole assembly 200 with a single-pole structure is more simple and convenient to lock and unlock, and when the upper pole 220 is telescopically extended or retracted relative to the lower pole 210, the upper pole 220 and the lower pole 210 with a single-pole structure will not be stuck due to different moving degrees of the two pole bodies.

[0042] Further, as shown in FIG. 4, the single-pole assembly 200 comprises a first locking member 230 and a second locking member 330, the first locking member 230 is arranged at the joint of the upper pole 220 and the lower pole 210, the second locking member 330 is arranged at the joint of the upper pole 220 and the control unit 300. Figures 4-8As shown, the mower body 100 is provided with two connecting seats 110, the two connecting seats 110 are spaced apart, the bottom end of the lower pull rod 210 is rotatably arranged between the two connecting seats 110, the two connecting seats 110 are each provided with a first locking piece 120, the end face of one side of the first locking piece 120 is provided with an axially extending locking boss 121, the end face of the other side of the first locking piece 120 is provided with a first meshing tooth 122, the connecting seat 110 is provided with a locking through slot 111, the locking boss 121 is arranged in the locking through slot 111, so that the first locking piece 120 can only move axially on the connecting seat 110 and cannot rotate circumferentially, the lower pull rod 210 is provided with two second locking pieces 240, the two second locking pieces 240 are respectively arranged one-to-one with the two first locking pieces 120, and the end face of one side of the second locking piece 240 is provided with a second meshing tooth 241. The mower body 100 is further provided with a locking lever 410, the locking lever 410 is arranged in the connecting seat 110 and the lower pull rod 210 and passes through the two first locking pieces 120 and the two second locking pieces 240, one end of the locking lever 410 is connected with a locking shaft 420, the locking shaft 420 is rotatably connected with a locking wrench 430, the locking wrench 430 includes a wrench part 432 and a locking part 431, the wrench part 432 and the locking part 431 are arranged perpendicularly to each other in an L-shaped manner, the length of the wrench part 432 is greater than the length of the locking part 431, the locking shaft 420 is arranged at the junction of the wrench part 432 and the locking part 431, the locking wrench 430 can rotate between a locking position and an unlocking position with the locking shaft 420 as the rotation center, the other end of the locking lever 410 is threadedly connected with a locking knob 440, the locking knob 440 can rotate relative to the locking lever 410 and separate from the locking lever 410, the first locking piece 120 on the side of the locking wrench 430 is further provided with a locking end cover 130, the locking end cover 130 is detachably connected to the first locking piece 120 by screw connection, the locking part 431 of the locking wrench 430 abuts against the locking end cover 130, the locking knob 440 abuts against the other first locking piece 120, when the locking wrench 430 is in the unlocking position, the first end face 4311 of the locking part 431 abuts against the locking end cover 130, when the locking wrench 430 is in the locking position, the second end face 4312 of the locking part 431 abuts against the locking end cover 130, the distance from the first end face 4311 to the locking shaft 420 is less than the distance from the second end face 4312 to the locking shaft 420, that is, the distance from the first end face 4311 to the locking knob 440 when the locking wrench 430 is in the unlocking position is greater than the distance from the second end face 4312 to the locking knob 440 when the locking wrench 430 is in the locking position.Further, specifically, when the lock forcing wrench 430 is rotated from the unlocking position to the locking position, the lock forcing wrench 430 can push the lock forcing end cover 130, and the lock forcing knob 440 can push the first locking piece 120, so that the first locking piece 120 cooperates with the second locking piece 240, the first meshing teeth 122 on the first locking piece 120 are engaged with the second meshing teeth 241 on the second locking piece 240, and since the first locking piece 120 cooperates with the connecting seat 110 and cannot rotate circumferentially, the second locking piece 240 cooperating with the first locking piece 120 also cannot rotate circumferentially, thereby realizing the locking of the single pull rod assembly 200, so that the single pull rod assembly 200 cannot be folded or unfolded relative to the lawn mower body 100.

[0043] The first locking piece 120 and the second locking piece 240 are also provided with a reset piece (not shown in the figure), which can be implemented as a compression spring, an elastic spring sheet or the like elastic piece with elastic potential, and the reset piece is suitable for continuously exerting a force on the first locking piece 120, which can drive the first locking piece 120 to move away from the second locking piece 240. Therefore, when the lock forcing wrench 430 is rotated from the locking position to the unlocking position, the reset piece can push the first locking piece 120, so that the first locking piece 120 is separated from the second locking piece 240, the first meshing teeth 122 are separated from the second meshing teeth 241, the locking of the single pull rod assembly 200 is released, and the single pull rod assembly 200 can be folded or unfolded relative to the lawn mower body 100. When locking or unlocking the single pull rod assembly 200, only the lock forcing wrench 430 needs to be rotated, and the operation of locking and unlocking is simple.

[0044] Based on the above structure, the single pull rod assembly 200 and the lawn mower body 100 can be detachable, and the detachment operation is simple and convenient. Specifically, when detaching, the user can rotate the lock forcing knob 440 with one hand and rotate the lock forcing wrench 430 with the other hand, rotate the lock forcing knob 440 relative to the lock forcing rod 410 to separate the lock forcing knob 440 and the lock forcing rod 410, and then the lock forcing rod 410 can be pulled out of the connecting seat 110 and the lower pull rod 210, and then the lower pull rod 210 can be detached from between the two connecting seats 110, that is, the single pull rod assembly 200 is detached from the lawn mower body 100. The single pull rod assembly 200 and the lawn mower body 100 can be detachably connected, so that when the single pull rod assembly 200 is damaged, the single pull rod assembly 200 can be detached for replacement, thereby reducing the later use cost.

[0045] The single-pull rod assembly 200 is locked in a manner that the first engagement tooth 122 is engaged with the second engagement tooth 241, and the locked single-pull rod assembly 200 is not prone to shaking during use, and the locking effect is good. The first engagement tooth 122 and the second engagement tooth 241 have the same number of teeth, and the number of teeth is 30-60. The number of teeth of the first engagement tooth 122 and the second engagement tooth 241 affects the spacing between adjacent two teeth on the engagement tooth. The more the number of teeth, the smaller the spacing between adjacent two teeth. The less the number of teeth, the larger the spacing between adjacent two teeth. The spacing between adjacent two teeth further affects the span between adjacent two angle gears of the single-pull rod assembly 200. Therefore, the number of teeth of the first engagement tooth 122 and the second engagement tooth 241 can be set according to the design target of the actual lawn mower product. Preferably, the number of teeth of the first engagement tooth 122 and the second engagement tooth 241 is 45.

[0046] The lock forcing end cover 130 is further provided with a lock forcing groove 140 which is communicated with the outside. The shape of the lock forcing groove 140 is matched with the lock forcing part 431 of the lock forcing wrench 430. The lock forcing part 431 of the lock forcing wrench 430 can be embedded in the lock forcing groove 140. Since the lock forcing end cover 130 is connected with the first locking piece 120 through the screw connection, and the first locking piece 120 is limited from rotating circumferentially through the cooperation of the locking boss 121 and the locking through groove 111, the lock forcing end cover 130 connected with the first locking piece 120 is also limited from rotating circumferentially. The lock forcing part 431 of the lock forcing wrench 430 is embedded in the lock forcing groove 140, so that the lock forcing wrench 430 is also limited from rotating circumferentially. Therefore, the user cannot operate the lock forcing wrench 430 to drive the lock forcing rod 410 to rotate circumferentially, which can avoid that the lock forcing wrench 430 is accidentally touched to release the locking of the single-pull rod assembly 200. The lock forcing groove 140 is communicated with the outside, and the lock forcing groove 140 does not affect the rotation of the lock forcing wrench 430 between the locking position and the unlocking position.

[0047] As shown in Figure 4 and Figure 9 , a limiting cross rod 150 is further arranged between the two connecting seats 110. When the single-pull rod assembly 200 is folded and attached to the upper surface of the lawn mower body 100, the single-pull rod assembly 200 is in contact with the limiting cross rod 150. The limiting cross rod 150 blocks the further folding of the single-pull rod assembly 200 to limit the folding position of the single-pull rod assembly 200, and when the single-pull rod assembly 200 is rotated to the folding position, the single-pull rod assembly 200 is arranged horizontally, and the upper surface of the lawn mower body 100 is arranged obliquely. The horizontally arranged single-pull rod assembly 200 can minimize the space occupied by the lawn mower and does not interfere with the lawn mower body 100.

[0048] As shown in Figures 10-11As shown, the control unit 300 is detachably arranged at the upper end of the single-pull rod assembly 200 and detachably connected with the upper pull rod 220. The control unit 300 comprises a panel body 310, holding portions 320 arranged at both sides of the panel body 310, and a connecting portion 330 arranged at the back of the panel body 310 and detachably connected with the upper pull rod 220. The panel body 310 is provided with a power switch 311 and a cutter switch 312. The power switch 311 is implemented as a button switch and arranged on the upper surface of the panel body 310. The cutter switch 312 is implemented as a trigger switch and arranged at both sides of the panel body 310. The cutter switch 312 extends below the holding portions 320, so that the user can pull the cutter switch 312 while holding the holding portions 320 with both hands. The cutter switch 312 and the power switch 311 cooperatively control the start and stop of the cutter assembly on the mower body 100. That is, the user needs to press the power switch 311 and then pull the cutter switch 312 to start the cutter assembly. The power switch 311 and the cutter switch 312 are arranged at different positions, so that the user cannot mistakenly touch any one of the switches to start the cutter assembly, thereby improving the safety of the mower.

[0049] Further, the connecting portion 330 is provided with a connecting column 331, and the connecting column 331 is provided with a connecting buckle 332 implemented as an elastic buckle. The rod body of the upper pull rod 220 is provided with a connecting hole 222 matched with the connecting buckle 332. When the control unit 300 is connected with the single-pull rod assembly 200, the connecting column 331 is inserted into the rod body of the upper pull rod 220, and the connecting buckle 332 is embedded in the connecting hole 222. Since the connecting buckle 332 is an elastic buckle, the connecting buckle 332 can also be separated from the connecting hole 222, so that the control unit 300 can be separated from the single-pull rod assembly 200.

[0050] The single-pull rod assembly 200 is further provided with a connecting wire (not shown in the figure). The bottom of the lower pull rod 210 and the connecting portion 330 are both provided with through holes for the connecting wire to extend out. One end of the connecting wire passes through the through hole and is connected with the circuit board on the panel body 310 through a pluggable fast socket circuit. The other end of the connecting wire passes through the through hole and is connected with the circuit board on the mower body 100 through a pluggable fast socket circuit. When the mower body 100, the single-pull rod assembly 200, and the control unit 300 are separated from each other, the connecting wire can also be separated from the mower body 100 and the control unit 300.

[0051] In some preferred embodiments, as shown in Figures 11-14 The height adjustment switch 313 is implemented as a knob switch, and is used to control the chassis height adjustment device 500 in the mower body 100. The user can rotate the height adjustment switch 313 in the clockwise or counterclockwise direction to raise or lower the chassis height of the mower body 100. As shown in Figure 1 The chassis height adjustment device 500 includes an adjustment base 510, a front axle assembly 520 and a rear axle assembly 530 for supporting the mower body 100, and a front support rod 540 and a rear support rod 550. The adjustment base 510 is provided with a driving assembly 560, such as a servo motor. The bottom end of the front support rod 540 is connected to the driving assembly 560, and the bottom end of the rear support rod 550 is rotationally connected to the adjustment base 510. The top end of the front support rod 540 is hingedly connected to the top end of the rear support rod 550. Thus, the driving assembly 560 can drive the bottom end of the front support rod 540 to slide in the adjustment base 510 to approach or move away from the bottom end of the rear support rod 550. The middle part of the front support rod 540 is provided with a hinge rod 541, which is provided with a first connecting rod 542 connected to the front axle assembly 520 and a second connecting rod 543 connected to the rear axle assembly 530. Thus, when the bottom end of the front support rod 540 is driven by the driving assembly 560 to slide in the adjustment base 510, the front axle assembly 520 and the rear axle assembly 530 can be driven to rotate by the first connecting rod 542 and the second connecting rod 543 to lift or lower the chassis of the mower body 100, thereby adjusting the chassis height of the mower body 100. The adjustment base 510 is also provided with a plurality of micro switches 570, which are arranged at intervals and on the movement track of the bottom end of the front support rod 540. When the bottom end of the front support rod 540 is driven by the driving assembly 560 to slide in the adjustment base 510, it can trigger any micro switch 570. When the micro switch 570 is triggered, it sends an electrical signal to stop the driving assembly 560 from driving the bottom end of the front support rod 540 to slide. Specifically, when the user rotates the height adjustment switch 313 on the panel body 310, the driving assembly 560 drives the front support rod 540 to slide. When the bottom end of the front support rod 540 slides to contact a micro switch 570 and triggers the micro switch 570, the micro switch 570 sends an electrical signal to stop the driving assembly 560 from working, so that the bottom end of the front support rod 540 only slides a fixed distance. Therefore, the front support rod 540 can only lift or lower the chassis of the mower body 100 by a fixed distance through the first connecting rod 542 and the second connecting rod 543, thereby achieving gear adjustment of the chassis height of the mower body 100.

[0052] Further, the plurality of micro switches 570 are arranged in two rows, and the two rows of micro switches 570 are arranged staggered with each other. Since the internal space of the mower body 100 is limited, the length of the adjusting base 510 is usually limited by the internal space, and the micro switch 570 itself also has a certain length. If each micro switch 570 is arranged in a row, the distance between two micro switches 570 will be large, and the height of the chassis of the mower body 100 will also be large when it is lifted or lowered each time, resulting in a large span between two adjacent gears of the height adjustment of the chassis of the mower body 100, which cannot meet the user's needs. If the micro switches 570 are arranged in two rows and staggered with each other, the distance between two adjacent micro switches 570 in different rows can be reduced, and the height of the chassis of the mower body 100 can be reduced when it is lifted or lowered each time, so that the span between two adjacent gears of the height adjustment of the chassis of the mower body 100 is small, which meets the user's needs.

[0053] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A lawnmower characterised in that, The lawn mower body, a single pull rod assembly and a control unit, one end of the single pull rod assembly is connected with the lawn mower body, the other end of the single pull rod assembly is connected with the control unit, the control unit is suitable for controlling the start and stop and movement of the lawn mower body, the control unit comprises a panel body, a holding part and a connecting part, the holding part is arranged on both sides of the panel body, and the connecting part is detachably connected with the single pull rod assembly.

2. The lawnmower as claimed in claim 1, characterized in that The panel body is provided with a power switch and a cutter disc switch, the cutter disc switch is arranged on both sides of the panel body and extends below the holding part, the power switch and the cutter disc switch are suitable for cooperatively controlling the start and stop of the cutter disc assembly on the lawn mower body, and a self-walking switch is further arranged on the holding part and is suitable for controlling the movement of the lawn mower body.

3. The lawnmower as claimed in claim 1, wherein, The single pull rod assembly comprises an upper pull rod connected with the lawn mower body and a lower pull rod connected with the control unit, the upper pull rod is telescopically inserted into the lower pull rod, a locking piece is arranged at the joint of the upper pull rod and the lower pull rod, the locking piece is suitable for locking or unlocking the upper pull rod and the lower pull rod, and the single pull rod assembly can be folded relative to the lawn mower body to make the control unit and the single pull rod assembly adhere to the upper surface of the lawn mower body.

4. The lawnmower as described in claim 3, characterized in that, A connecting column is arranged on the connecting part, a connecting buckle is arranged on the connecting column, a connecting hole is formed in the rod body of the upper pull rod, the connecting column can be inserted into the rod body of the upper pull rod, and the connecting buckle can be detachably embedded in the connecting hole.

5. The lawnmower as claimed in claim 3, wherein, Two connecting seats are arranged on the lawn mower body, the lower pull rod is rotatably arranged between the two connecting seats, a first locking piece is arranged on each of the two connecting seats, two second locking pieces are arranged on the lower pull rod, a lock forcing rod is further arranged in the connecting seat and the lower pull rod, one end of the lock forcing rod is rotatably connected with a lock forcing wrench, the other end of the lock forcing rod is threadedly connected with a lock forcing knob, the lock forcing wrench and the lock forcing knob respectively abut against one of the first locking pieces, when the lock forcing wrench is rotated from an unlocking position to a locking position, the lock forcing wrench and the lock forcing knob can push the first locking piece to cooperate with the second locking piece, so as to limit the rotation of the single pull rod assembly relative to the lawn mower body.

6. The lawnmower as described in claim 5, characterized in that, A lock forcing end cover is arranged on the first locking piece on one side of the lock forcing wrench, the lock forcing end cover is provided with a lock forcing groove in communication with the outside, the lock forcing groove is matched with the lock forcing wrench, and the lock forcing wrench can be embedded in the lock forcing groove, so as to limit the circumferential rotation of the lock forcing wrench.

7. The lawnmower of claim 6 wherein, The first locking piece is provided with a first meshing tooth, the second locking piece is provided with a second meshing tooth, when the first locking piece cooperates with the second locking piece, the first meshing tooth engages with the second meshing tooth, and the number of the first meshing tooth and the second meshing tooth is 30-60.

8. The lawnmower as claimed in claim 6, characterized in that, The first locking member and the second locking member are provided with a reset member, which is suitable for continuously exerting force on the first locking member, so that the first locking member can be automatically separated from the second locking member after the lock lever is turned from the locking position to the unlocking position.

9. The lawnmower as claimed in claim 3, wherein, The mower body is provided with a limiting cross rod, which is suitable for abutting against the single-pull rod assembly to limit the maximum folding position of the single-pull rod assembly, so that the single-pull rod assembly in the maximum folding position is arranged horizontally.

10. The lawnmower as claimed in claim 2, wherein, The single-pull rod assembly is provided with a connecting wire, both ends of the connecting wire extending out of the single-pull rod assembly, and both ends of the connecting wire being respectively and pluggably connected with the mower body and the control unit.

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