Height adjusting assembly and mower

Abstract

The utility model discloses a height adjusting assembly and a lawn mower, and relates to the technical field of gardening equipment, the height adjusting assembly comprises a fixing frame, which is fixedly arranged on a casing through a detachable structure; the movable frame is arranged opposite to the fixed frame and is used for mounting a mowing assembly; the swing frame is provided with a first end and a second end, the first end is rotationally connected with the fixed frame through a first quick-assembly structure, the second end is rotationally connected with the movable frame through a second quick-assembly structure, the first swing frame can swing up and down relative to the machine shell, and the movable frame swings along with the first swing frame; the motor drives the mowing assembly to ascend or descend; and the driving assembly can enable the swing frame to swing upwards or downwards. According to the technical scheme, the problem that a height adjusting assembly is inconvenient to assemble can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the lawn mower technical field, especially a height adjusting assembly and lawn mower. BACKGROUND

[0002] The lawn mower is a kind of gardening equipment, and the lawn mower usually has a cutterhead and other structures, in order to keep the lawn beautiful, the height of the cutterhead is usually adjusted to ensure that the height of the lawn is uniform after each pruning.The lawn mower includes a height adjusting assembly and a cutterhead, and the height adjusting assembly of the existing lawn mower has the problem of inconvenient assembly. SUMMARY

[0003] The main purpose of the utility model is to provide a height adjusting assembly and lawn mower, to solve the problem of inconvenient assembly of the height adjusting assembly.

[0004] To achieve the above-mentioned purpose, the height adjusting assembly according to the utility model is applied to a lawn mower, and the lawn mower includes a casing, and the height adjusting assembly includes:

[0005] A fixed frame is fixed to the casing by a detachable structure;

[0006] A movable frame is arranged opposite to the fixed frame and is used for mounting a grass cutting assembly;

[0007] A swing frame is provided with a first end and a second end, the first end is rotatably connected to the fixed frame by a first quick-mounting structure, the second end is rotatably connected to the movable frame by a second quick-mounting structure, the swing frame can swing up and down relative to the casing, and the movable frame swings with the swing frame to drive the grass cutting assembly to rise or fall; and

[0008] A driving assembly can make the swing frame swing upward or downward.

[0009] In an embodiment, the first quick-mounting structure includes a connecting groove arranged on the fixed frame and a connecting shaft fixed to the first end, the connecting shaft is arranged in the connecting groove and can rotate in the connecting groove;

[0010] The connecting groove is provided with a slot, and the caliber of the slot is smaller than the inner diameter of the connecting groove;

[0011] The circumference of the connecting shaft is formed with a first plane, the first plane makes the connecting shaft have a minimum diameter and a maximum diameter, the minimum diameter of the connecting shaft is smaller than the caliber of the slot, and the maximum diameter of the connecting shaft is larger than the caliber of the slot;

[0012] When the grass cutting assembly rises or falls, the connecting groove center and the slot center line are not parallel to the first plane.

[0013] In an embodiment, the first plane is provided with two, and symmetrically arranged;

[0014] And / or, the fixing frame is provided with a first mounting cavity, opposite two side walls of the first mounting cavity are provided with connecting grooves, the first end is inserted into the first mounting cavity, and the first end is provided with two connecting shafts.

[0015] In an embodiment, the second quick-mounting structure comprises a connecting pin, a limiting portion, a first mounting hole arranged on the movable frame, and a second mounting hole arranged on the second end, the connecting pin is provided with a rotating mounting position and a limiting section at one end, the connecting pin passes through the first mounting hole and the second mounting hole, and the limiting section and the limiting portion can limit the first mounting hole and the second mounting hole to the rotating mounting position of the connecting pin.

[0016] In an embodiment, the movable frame is provided with a second mounting cavity, and opposite two side walls of the second mounting cavity are provided with the first mounting hole, and the second end can be inserted into the second mounting cavity.

[0017] In an embodiment, the limiting section is provided with a second plane, the outside of the movable frame is provided with a convex rib, the limiting section abuts against the outside of the movable frame, the convex rib cooperates with the second plane, and the rotating of the connecting pin can be limited;

[0018] And / or, the other end of the connecting pin is provided with a plurality of elastic sections, at least one of the elastic sections is provided with a flange, the diameter of the outer circumference of the flange is greater than the diameter of the rotating mounting position, the limiting portion is configured as the flange, the flange is provided with a first guide inclined surface, the connecting pin is inserted into the first mounting hole or the second mounting hole, the first guide inclined surface abuts against the first mounting hole or the second mounting hole, and the flange can be moved to the axis of the connecting pin.

[0019] In an embodiment, the driving assembly comprises a guide wheel arranged on the fixing frame, a convex portion arranged on the swing frame, and a driving portion mounted on the mower, the guide wheel can rotate relative to the fixing frame, the guide wheel is provided with a second guide inclined surface, the convex portion abuts on the second guide inclined surface, and the driving portion can drive the guide wheel to rotate, so that the convex portion rises or falls along the second guide inclined surface, so that the swing frame swings upward or downward;

[0020] When the height-adjusting assembly is mounted into the mower along the height direction of the mower, the guide wheel is close to the driving portion, so that the driving portion is in transmission connection with the guide wheel.

[0021] In an embodiment, the fixed frame is provided with a support column, the guide wheel is provided with a third mounting cavity, and the guide wheel is sleeved on the support column through the third mounting cavity;

[0022] The support column is provided with a plurality of grooves on the side thereof;

[0023] And / or, the swing frame is configured in two, the two swing frames are arranged in a stacked manner along the height direction of the mower, the swing frame located at the upper layer is provided with a protrusion, and an elastic expansion member is connected between the two swing frames, and the elastic expansion member can make the two swing frames tend to be close to each other.

[0024] In an embodiment, the driving assembly further comprises a key shaft and a key sleeve, one of the key shaft and the key sleeve is arranged on the guide wheel, and the other is arranged on the driving part, when the height adjusting assembly is mounted into the machine shell along the height direction of the mower, the key shaft is inserted into the key sleeve, and the driving part can drive the guide wheel through the key shaft and the key sleeve; the end of the key shaft facing the key sleeve is provided with a chamfer.

[0025] The utility model also provides a mower, comprising a height adjusting assembly, the height adjusting assembly is any one of the height adjusting assembly.

[0026] The technical scheme of the utility model adopts the swing frame to be rotatably connected with the fixed frame through the first quick mounting structure, and rotatably connected with the movable frame through the second quick mounting structure, so that the height adjusting assembly can be conveniently assembled under the action of the quick mounting structure, further, the fixed frame in the height adjusting assembly is fixedly arranged in the machine shell through the detachable structure, after the fixed frame, the movable frame and the swing frame in the height adjusting assembly are assembled through the first quick mounting structure and the second quick mounting structure, the height adjusting assembly can be connected with the machine shell of the mower through the detachable structure, so that the height adjusting assembly can be quickly assembled while being quickly connected with the machine shell of the mower, and the problem that the height adjusting assembly in the mower is inconvenient to assemble in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0028] Figure 1 The structure schematic view of the mower provided by the utility model is shown in an embodiment.

[0029] Figure 2 The structure schematic view of the mower provided by the utility model is shown in an embodiment. Figure 1 The bottom structure schematic view of the mower

[0030] Figure 3 A schematic diagram of the structure of an embodiment of the height adjustment component, first quick-release structure, second quick-release structure, drive component, and mowing component in the lawnmower provided by this utility model;

[0031] Figure 4 for Figure 3 Schematic diagram of the swing frame structure;

[0032] Figure 5 for Figure 3 A schematic diagram of the structure of the drive component;

[0033] Figure 6 for Figure 3 A schematic diagram of the structure of an embodiment of a lawn mowing component;

[0034] Figure 7 for Figure 6 Schematic diagram of the movable frame in the middle;

[0035] Figure 8 for Figure 3 A schematic diagram of the connecting pin in the second quick-release structure;

[0036] Figure 9 for Figure 3 A schematic diagram of the guide wheel in the drive assembly;

[0037] Figure 10 A schematic diagram of another embodiment of the height adjustment component, first quick-release structure, second quick-release structure, drive component, and mowing component in the lawnmower provided by this utility model;

[0038] Figure 11 for Figure 10 A schematic diagram showing a structure with two swing frames.

[0039] Explanation of icon numbers:

[0040] 100. Height adjustment component; 110. Fixing frame; 111. First mounting cavity; 112. Support column; 113. Groove; 114. Mounting part; 120. Movable frame; 121. Second mounting cavity; 130. Swing frame; 131. First end; 132. Second end; 140. Elastic telescopic component;

[0041] 200, First quick-connect structure; 210, Connecting groove; 211, Groove opening; 220, Connecting shaft; 221, First plane;

[0042] 300, second quick mounting structure; 310, connecting pin; 311, limiting section; 312, second plane; 313, elastic section; 314, flange; 315, first guide slope; 320, limiting part; 330, first mounting hole; 340, second mounting hole; 350, convex rib;

[0043] 400, driving assembly; 410, guide wheel; 411, second guide slope; 412, third mounting cavity; 420, convex part; 430, driving part; 440, key shaft; 450, key sleeve; 460, chamfer;

[0044] 500, machine shell;

[0045] 600, mowing assembly; 610, cutting motor; 620, cutter head; 630, motor shell.

[0046] The purposes, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0048] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0049] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one feature. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0050] The lawn mower is a kind of gardening equipment, and the lawn mower usually has a cutter head and the like, and in order to keep the lawn beautiful, the height of the lawn is usually ensured to be uniform after each time of mowing by adjusting the height of the cutter head

[0051] The utility model provides a height adjusting assembly applied to a lawn mower, wherein the lawn mower comprises a casing 500.

[0052] Please refer to Figure 1 、 Figure 2 、 Figure 3 In an embodiment of the utility model, the height adjusting assembly 100 comprises a fixing frame 110, a movable frame 120, a swing frame 130, a driving assembly 400, a first quick mounting structure 200 and a second quick mounting structure 300; wherein the fixing frame 110 is fixed to the casing 500 through a detachable structure, and further, the fixing frame 110 can be fixed to the casing 500 through a screw locking mode. Specifically, the movable frame 120 is arranged opposite to the fixing frame 110, and is used for mounting a mowing assembly 600, wherein the mowing assembly 600 (see Figure 6) includes cutting motor 610, cutter head 620, motor housing 630, cutter head 620 is connected to cutting motor 610, cutting motor 610 can drive cutter head 620 to rotate, cutting motor 610 is installed on motor housing 630, motor housing 630 is installed on movable frame 120, further, motor housing 630 is fixedly arranged on movable frame 120. Further, the swing frame 130 is provided with a first end 131 and a second end 132, the first end 131 of the swing frame 130 is rotatably connected to the fixed frame 110 through the first quick-mounting structure 200, the second end 132 of the swing frame 130 is rotatably connected to the movable frame 120 through the second quick-mounting structure 300, the swing frame 130 can swing up and down relative to the machine housing 500, the movable frame 120 swings up and down with the swing frame 130 to drive the grass cutting assembly to rise or fall; the driving assembly 400 can make the swing frame 130 swing up or down, it should be noted that when the driving assembly 400 drives the swing frame 130 to swing up or down, the movable frame 120 can swing with the swing frame 130, since the grass cutting assembly is installed on the movable frame 120, the grass cutting assembly can rise or fall when the movable frame 120 swings up or down. At the same time, the swing frame 130 is rotatably connected to the fixed frame 110 through the first quick-mounting structure 200 and rotatably connected to the movable frame 120 through the second quick-mounting structure 300, which can facilitate the assembly of the height adjustment assembly 100 under the action of the quick-mounting structure, further, the fixed frame 110 in the height adjustment assembly 100 is fixedly arranged on the machine housing 500 through a detachable structure, when the fixed frame 110, the movable frame 120 and the swing frame 130 in the height adjustment assembly 100 are assembled through the first quick-mounting structure 200 and the second quick-mounting structure 300, the height adjustment assembly 100 can be connected with the machine housing 500 of the lawn mower through the detachable structure, so that the height adjustment assembly 100 can be quickly connected with the machine housing 500 of the lawn mower while ensuring the quick assembly of the height adjustment assembly 100, thereby solving the problem of inconvenient assembly of the height adjustment assembly 100 in the lawn mower in the prior art. It should be noted that the first quick-mounting structure 200 and the second quick-mounting structure 300 can be the same or different, when the first quick-mounting structure 200 and the second quick-mounting structure 300 are the same, it can be understood that the first end 131 of the swing frame 130 is rotatably connected to the fixed frame 110 through a quick-mounting structure, and the second end 132 of the swing frame 130 is rotatably connected to the fixed frame 110 through another quick-mounting structure. When the first quick-mounting structure 200 and the second quick-mounting structure 300 are different, the first end 131 of the swing frame 130 is rotatably connected to the fixed frame 110 through the first quick-mounting structure 200, and the second end 132 of the swing frame 130 is rotatably connected to the movable frame 120 through the second quick-mounting structure 300. Of course, the first end 131 of the swing frame 130 can also be rotatably connected to the fixed frame 110 through the second quick-mounting structure 300, and the second end 132 of the swing frame 130 can be rotatably connected to the movable frame 120 through the first quick-mounting structure 200.

[0053] In an embodiment, referring to Figure 4 , Figure 5 , the first quick-mounting structure 200 can adopt the following structure, which comprises a connecting groove 210 arranged on the fixed frame 110, and a connecting shaft 220 fixedly arranged on the first end 131 of the swing frame 130, the connecting shaft 220 being arranged in the connecting groove 210 and being capable of rotating in the connecting groove 210; the connecting groove 210 is provided with a slot 211, the caliber of the slot 211 being smaller than the inner diameter of the connecting groove 210; the circumference of the connecting shaft 220 is formed with a first plane 221, the first plane 221 being arranged such that the connecting shaft 220 has a minimum diameter and a maximum diameter, the minimum diameter of the connecting shaft 220 being smaller than the caliber of the slot 211, and the maximum diameter of the connecting shaft 220 being greater than the caliber of the slot 211; when the grass cutting assembly is ascending or descending, the line connecting the center of the connecting groove 210 and the center of the slot 211 is not parallel to the first plane 221. It can be understood that, by means of the first quick-mounting structure 200, when the first end 131 of the swing frame 130 is assembled with the fixed frame 110, a certain angle is formed between the swing frame 130 and the fixed frame 110, so that the connecting shaft 220 can pass through the caliber of the slot 211 with the minimum diameter, and thus the connecting shaft 220 enters the connecting groove 210, thereby completing the assembly of the first end 131 of the swing frame 130 with the fixed frame 110. It is emphasized that, when the first end 131 of the swing frame 130 is assembled with the fixed frame 110, the line connecting the center of the connecting groove 210 and the center of the slot 211 is not parallel to the first plane 221 when the swing frame 130 swings up and down, at this time, the slot 211 of the connecting groove 210 can limit the connecting shaft 220, avoiding the connecting shaft 220 from being separated from the connecting groove 210 when rotating.

[0054] Further, in an embodiment, the first plane 221 in the first quick-mounting structure 200 is provided with two first planes 221, which are symmetrically arranged, so that the minimum diameter on the connecting shaft 220 can be as small as possible, and thus the caliber of the slot 211 of the connecting groove 210 can be as small as possible, facilitating the slot 211 to better limit the connecting shaft 220 in the connecting groove 210.

[0055] Further, in an embodiment, referring to Figure 5In the first quick-installation structure 200, two connecting slots 210 are provided. Specifically, the fixing frame 110 is provided with a first mounting cavity 111, and connecting slots 210 are provided on both opposite side walls of the first mounting cavity 111. The first end 131 is inserted into the first mounting cavity 111, and the first end 131 is provided with two connecting shafts 220. This arrangement makes the first end 131 of the swing frame 130 more stable when rotating on the fixing frame 110, compared to having only one connecting slot 210. Furthermore, in some embodiments, when two connecting shafts 220 are provided on the first end 131, one of the connecting shafts 220 does not need to have a first plane 221.

[0056] Furthermore, in one embodiment, the first end 131 of the swing frame 130 can be configured as two. It is understood that the swing frame 130 can then be two parallel swing rods (not shown), or the swing frame 130 can be in an "I" shape (see...). Figure 4 , Figure 11 Alternatively, the swing frame 130 may be Y-shaped (not shown). It should be noted that when the swing frame 130 has two first ends 131, the fixing frame 110 has two mounting portions 114, each corresponding to one of the two first ends 131 of the swing frame 130. In some embodiments, when the swing frame 130 has two first ends 131, the connecting shaft 220 on the first end 131 can be one. Further, in some embodiments, the first mounting cavity 111 is formed on the mounting portion 114.

[0057] In one embodiment, reference Figure 4 , Figure 7 , Figure 8 The second quick-installation structure 300 adopts the following structure: The second quick-installation structure 300 includes a connecting pin 310, a limiting part 320, a first mounting hole 330 provided in the movable frame 120, and a second mounting hole 340 provided in the second end 132. The connecting pin 310 has a rotating mounting position and a limiting segment 311 at one end. The connecting pin 310 passes through the first mounting hole 330 and the second mounting hole 340. The limiting segment 311 and the limiting part 320 can limit the first mounting hole 330 and the second mounting hole 340 to the rotating mounting position of the connecting pin 310. It can be understood that in this embodiment, the limiting part 320 can be a retaining ring. When the connecting pin 310 passes through the first mounting hole 330 and the second mounting hole 340, it is mounted on the connecting pin 310 by the retaining ring. At this time, the retaining ring, in conjunction with the limiting segment 311, can limit the first mounting hole 330 and the second mounting hole 340 to the rotating mounting position.

[0058] Furthermore, in one embodiment, reference is made to... Figure 7The movable frame 120 is provided with a second mounting cavity 121, and the first mounting holes 330 are arranged on opposite two side walls of the second mounting cavity 121. The second end 132 can be inserted into the second mounting cavity 121. In this way, the second end 132 of the swing frame 130 can rotate more stably on the movable frame 120, compared with the case that the first mounting holes 330 are arranged as one.

[0059] Further, in an embodiment, with reference to Figure 7 、 Figure 8The limiting section 311 in the second quick-mounting structure 300 is provided with a second plane 312, the outer side of the movable frame 120 is provided with a convex rib 350, the limiting section 311 abuts against the outer side of the movable frame 120, the convex rib 350 cooperates with the second plane 312, and the rotation of the connecting pin 310 can be limited. In this way, when the swing frame 130 swings up and down, the self-rotation of the connecting pin 310 can be limited under the action of the second plane 312 and the convex rib 350, and the friction of the connecting pin 310 is reduced. The second plane 312 can be provided in multiple, and the convex rib 350 can also be provided in multiple correspondingly. Further, in some embodiments, when the limiting section 311 is provided with the second plane 312 and the outer side of the movable frame 120 is provided with the convex rib 350, the other end of the connecting pin 310 in the second quick-mounting structure 300 is provided with multiple elastic sections 313, at least one of the elastic sections 313 is provided with a flange 314, the diameter of the outer circumference of the flange 314 is greater than the diameter of the rotating mounting position, the limiting section 320 is configured as the flange 314, the flange 314 is provided with a first guide inclined surface 315, the connecting pin 310 is inserted into the first mounting hole 330 or the second mounting hole 340, the first guide inclined surface 315 abuts against the first mounting hole 330 or the second mounting hole 340, and the flange 314 can be moved to the axis of the connecting pin 310. It should be noted that when the multiple elastic sections 313 are all provided with the flange 314, the multiple flanges 314 can form a ring protrusion. At this time, when the connecting pin 310 is inserted into the first mounting hole 330 or the second mounting hole 340, the first mounting hole 330 or the second mounting hole 340 can push the first guide inclined surface 315, the flange 314 can be moved to the axis of the connecting pin 310 when the first guide inclined surface 315 is pushed, the elastic section 313 provided with the flange 314 can be deformed, the flange 314 returns to the initial position after the flange 314 is out of the first mounting hole 330 or the second mounting hole 340, and the flange 314 and the limiting section 311 can limit the first mounting hole 330 and the second mounting hole 340 on the rotating mounting position. It should be noted that the connecting pin 310 in the embodiment can be assembled without tools. It can be understood that only the connecting pin 310 needs to be inserted into the first connecting hole and the second connecting hole during assembly, so that the second end 132 of the swing frame 130 and the movable frame 120 can be quickly mounted, and the assembly convenience of the height-adjusting assembly 100 is improved.

[0060] In an embodiment, referring to Figure 11The second end 132 of the swing frame 130 can be set to two. This means the swing frame 130 can be two parallel swing rods, or it can be in an "I" shape, or it can be in a "Y" shape. It should be noted that when both the first end 131 and the second end 132 of the swing frame 130 are set to two, the swing frame 130 can be two parallel swing rods, or it can be in an "I" shape. When the second end 132 of the swing frame 130 is also set to two, the number of movable frames 120 is also set to two. In this case, the mowing assembly is positioned between the two movable frames 120, meaning the motor housing 630 in the mowing assembly is fixed to the two movable frames 120.

[0061] In one embodiment, reference Figure 3 , Figure 10 The drive assembly 400 includes a guide wheel 410 disposed on the fixed frame 110, a protrusion 420 disposed on the swing frame 130, and a drive unit 430 mounted on the lawnmower. The guide wheel 410 is rotatable relative to the fixed frame 110. The guide wheel 410 is provided with a second guide inclined surface 411. The protrusion 420 abuts against the second guide inclined surface 411. The drive unit 430 is capable of driving the guide wheel 410 to rotate. In some embodiments, the second guide inclined surface 411 can be a straight inclined surface or a spiral inclined surface. When the guide wheel 410 rotates, rotating the guide wheel 410 can cause the protrusion 420 to rise or fall along the second guide inclined surface 411, so that the swing frame 130 swings up or down. When the height adjustment component 100 is installed into the lawnmower along its height direction, the guide wheel 410 is close to the drive unit 430, so that the drive unit 430 and the guide wheel 410 are connected in a transmission manner. Thus, while the height adjustment component 100 is being assembled into the lawnmower, the drive unit 430 and the guide wheel 410 are also connected in a transmission manner, thereby simplifying the assembly process and improving the assembly effect. It can be understood that for the assembly of the lawnmower, after assembling the mowing component, swing frame 130, movable frame 120, fixed frame 110, and guide wheel 410 to form a modular structure, when this modular structure is assembled into the lawnmower housing 500, the guide wheel 410 can be connected in a transmission manner to the drive unit 430 of the lawnmower. Since the swing frame 130 is connected to the movable frame 120 and fixed frame 110 through a quick-release structure, the assembly of the swing frame 130, movable frame 120, and fixed frame 110 can also be quick and convenient, improving assembly efficiency.

[0062] Furthermore, in one embodiment, reference is made to... Figure 5The driving assembly 400 further comprises a key shaft 440 and a key sleeve 450, one of which is arranged on the guide wheel 410 and the other of which is arranged on the driving part 430, and when the height adjustment assembly 100 is mounted into the casing along the height direction of the mower, the key shaft 440 is inserted into the key sleeve 450, and the driving part 430 can drive the guide wheel 410 through the key shaft 440 and the key sleeve 450. In order to facilitate the better insertion of the key shaft 440 into the key sleeve 450, the end of the key shaft 440 facing the key sleeve 450 is provided with a chamfer 460. Further, in some embodiments, the key shaft 440 and the key sleeve 450 can be a spline shaft 440 and a spline sleeve 450. It should be noted that the length direction of the key on the key shaft 440 is parallel to the height direction of the mower, and the length direction of the key groove in the key sleeve 450 is parallel to the height direction of the mower. Further, in some embodiments, the driving assembly 400 further comprises a first connecting plate and a second connecting plate, wherein the first connecting plate is provided with a plurality of insertion holes, and the second connecting plate is provided with a plurality of insertion pins, one of the first connecting plate and the second connecting plate is arranged on the guide wheel 410 and the other is arranged on the driving part 430, and when the height adjustment assembly 100 is mounted into the casing along the height direction of the mower, the plurality of insertion pins can be inserted into the plurality of insertion holes one by one, and the power of the driving part 430 is transmitted to the guide wheel 410 through the insertion pins and the insertion holes. Further, the driving part 430 can be configured as a driving motor, and the driving motor is fixedly arranged on the casing 500.

[0063] In an embodiment, with reference to Figure 5 、 Figure 9The fixed frame 110 is provided with a support column 112, the guide wheel 410 is provided with a third mounting cavity 412, and the guide wheel 410 is sleeved on the support column 112 through the third mounting cavity 412. In order to reduce the friction between the support column 112 and the third mounting cavity 412, so that the guide wheel 410 rotates more smoothly on the support column 112, a plurality of grooves 113 are formed in the side of the support column 112. By forming the grooves 113 in the support column 112, the contact area between the outer side of the support column 112 and the cavity wall of the third mounting cavity 412 can be reduced, thereby reducing the friction therebetween. In some embodiments, bearings can also be provided between the support column 112 and the third mounting cavity 412 to reduce the friction therebetween. Compared with providing bearings between the support column 112 and the third mounting cavity 412, by forming grooves 113 on the surface of the support column 112, the diameter of the support column 112 can be relatively large, and the structure between the guide wheel 410 and the support column 112 can be relatively compact. It should be noted that when the guide wheel 410 is connected with the fixed frame 110 through the support column 112, the third mounting cavity 412 and the fixed frame 110, the guide wheel 410 can form a plug-in structure with the fixed frame 110, which facilitates the assembly of the guide wheel 410 and the fixed frame 110. In some embodiments, the support column 112 can be provided on the guide wheel 410, and the third mounting cavity 412 can be provided on the fixed frame 110.

[0064] In an embodiment, referring to Figure 10 、 Figure 11 Two swing frames 130 are arranged, and the two swing frames 130 are arranged in a stacking manner along the height direction of the mower. The swing frame 130 at the upper layer is provided with a convex portion 420. The two swing frames 130 are connected with an elastic expansion piece 140. The elastic expansion piece 140 can make the two swing frames 130 tend to be close to each other. Further, the elastic expansion piece 140 is configured as a tension spring. The elastic expansion piece 140 can make the two swing frames 130 maintain at a specific position or posture. During the movement of the mower, the elastic expansion piece 140 can buffer the two swing frames 130, so as to keep the distance between the cutter head and the ground consistent, and make the height of the lawn after trimming have better consistency.

[0065] The utility model also provides a mower, referring to Figure 1 、 Figure 2 、 Figure 3 The mower comprises a height adjusting assembly 100 and a machine shell 500. The specific structure of the height adjusting assembly 100 is referred to the above embodiment. Since the mower adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The height adjusting assembly 100 is installed on the machine shell 500.

[0066] The above merely describes exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, made by using the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A lift assembly for use in a lawn mower, the lawn mower including a housing, the lift assembly comprising: The height adjusting assembly comprises: a fixed frame fixed to the casing by a detachable structure; a movable frame arranged opposite to the fixed frame and used for mounting the mowing assembly; a swing frame having a first end and a second end, the first end being rotatably connected to the fixed frame by a first quick-mounting structure, the second end being rotatably connected to the movable frame by a second quick-mounting structure, the swing frame being able to swing up and down relative to the casing, the movable frame swinging with the swing frame to drive the mowing assembly to rise or fall; and a driving assembly capable of swinging the swing frame upward or downward.

2. The height adjustment assembly of claim 1, wherein, The first quick-mounting structure comprises a connecting groove arranged on the fixed frame and a connecting shaft fixed to the first end, the connecting shaft being arranged in the connecting groove and being able to rotate in the connecting groove; the connecting groove is provided with a slot, the diameter of the slot being smaller than the inner diameter of the connecting groove; the circumference of the connecting shaft is formed with a first plane, the first plane being such that the connecting shaft has a minimum diameter and a maximum diameter, the minimum diameter of the connecting shaft being smaller than the diameter of the slot, and the maximum diameter of the connecting shaft being greater than the diameter of the slot; when the mowing assembly rises or falls, the line connecting the center of the connecting groove and the center of the slot is not parallel to the first plane.

3. The height adjustment assembly of claim 2, wherein, The first plane is provided with two and is symmetrically arranged; and / or, the fixed frame is provided with a first mounting cavity, the opposite two side walls of the first mounting cavity are each provided with a connecting groove, the first end is inserted into the first mounting cavity, and the first end is provided with two connecting shafts.

4. The height adjustment assembly of claim 1, wherein, The second quick-mounting structure comprises a connecting pin, a limiting portion, a first mounting hole arranged on the movable frame, and a second mounting hole arranged on the second end, the connecting pin is provided with a rotating mounting position and a limiting section at one end, the connecting pin passes through the first mounting hole and the second mounting hole, and the limiting section and the limiting portion can limit the first mounting hole and the second mounting hole in the rotating mounting position of the connecting pin.

5. The height adjustment assembly of claim 4, wherein, The movable frame is provided with a second mounting cavity, the opposite two side walls of the second mounting cavity are provided with the first mounting hole, and the second end can be inserted into the second mounting cavity.

6. The height adjustment assembly of claim 5, wherein, The limiting section is provided with a second plane, the outside of the movable frame is provided with a protruding rib, the limiting section abuts against the outside of the movable frame, the protruding rib cooperates with the second plane to limit the rotation of the connecting pin; and / or, the other end of the connecting pin is provided with a plurality of elastic sections, at least one of the elastic sections is provided with a flange, the diameter of the outer circumference of the flange is greater than the diameter of the rotating mounting position, the limiting portion is configured as a flange, the flange is provided with a first guide inclined surface, the connecting pin is inserted into the first mounting hole or the second mounting hole, the first guide inclined surface abuts against the first mounting hole or the second mounting hole to move the flange to the axis of the connecting pin.

7. A height adjustment assembly as claimed in any one of claims 1 to 6, wherein, The driving assembly comprises a guide wheel arranged on the fixed frame, a convex part arranged on the swing frame, and a driving part arranged on the mower, the guide wheel is rotatable relative to the fixed frame, the guide wheel is provided with a second guide slope, the convex part abuts on the second guide slope, and the driving part is capable of driving the guide wheel to rotate, rotating the guide wheel can make the convex part ascend or descend along the second guide slope, so as to swing the swing frame upward or downward. When the height-adjusting assembly is arranged in the mower along the height direction of the mower, the guide wheel is close to the driving part, so that the driving part is in transmission connection with the guide wheel.

8. The height adjustment assembly of claim 7, wherein, The fixed frame is provided with a support column, the guide wheel is provided with a third mounting cavity, and the guide wheel is sleeved on the support column through the third mounting cavity. A plurality of grooves are formed on the side of the support column. The swing frame is arranged in two, the two swing frames are arranged in a stacked manner along the height direction of the mower, the swing frame arranged in the upper layer is provided with a convex part, and an elastic expansion piece is arranged between the two swing frames, the elastic expansion piece can make the two swing frames tend to be close to each other.

9. The height adjustment assembly of claim 7, wherein, The driving assembly further comprises a key shaft and a key sleeve, one of the key shaft and the key sleeve is arranged on the guide wheel, and the other is arranged on the driving part, when the height-adjusting assembly is arranged in the casing along the height direction of the mower, the key shaft is inserted into the key sleeve, the driving part can drive the guide wheel through the key shaft and the key sleeve, and the end of the key shaft facing the key sleeve is chamfered.

10. A lawnmower characterised in that, The height-adjusting assembly comprises a height-adjusting assembly, and the height-adjusting assembly is any one of the height-adjusting assemblies according to claims 1 to 9.

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