Lawn mower and its assembly method

Abstract

The present application discloses a lawn mower and an assembly method thereof. The lawn mower includes a cover body and a chassis located below the cover body. Among them, the cover body is movably connected to the chassis through a connecting device. The connecting device includes: a base, the base is detachably and fixedly connected to the chassis; a connecting rod, a first end of the connecting rod is movably coupled to the cover body; and an elastic member, a first end of the elastic member is connected to a second end of the connecting rod, and a second end of the elastic member is connected to the base. The lawn mower of the present application is convenient to assemble and can be installed without tools.

Description

Technical Field

[0001] The present invention relates to garden equipment, and more particularly to a lawn mower. Background Art

[0002] Existing lawn mowers are becoming more and more intelligent. When most intelligent lawn mowers touch an obstacle or are lifted manually, relevant signals will be transmitted to the controller, and the controller will make corresponding feedback, so that the lawn mower will perform corresponding actions, such as stopping working.

[0003] A lawn mower usually has a chassis and a cover body, and the cover body is movably connected to the chassis. When an intelligent lawn mower touches an obstacle or is lifted manually, the cover body part will move relative to the chassis part, thereby triggering the corresponding sensor or micro switch to act, so that the lawn mower performs relevant actions, such as backing up or stopping working.

[0004] Currently, the cover body is generally movably connected to the chassis through a connecting component. These connecting components usually consist of multiple parts, and generally need to be fixedly connected to the cover body and the chassis by screws. The assembly is relatively complex, time-consuming, and requires tools for installation. In addition, the structure of the existing connecting components is usually relatively complex, resulting in higher costs or unreliable operation.

[0005] Therefore, it is necessary to make further improvements to the existing lawn mower to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a lawn mower, which has a connecting device for connecting the cover body and the chassis with a relatively simple structure and without the need for tool installation.

[0007] To achieve the above object, the present invention provides a lawn mower, which includes a cover body and a chassis located below the cover body. Among them, the cover body is movably connected to the chassis through a connecting device, and the connecting device includes:

[0008] A base, the base is detachably and fixedly connected to the chassis;

[0009] A connecting rod, the first end of the connecting rod is movably coupled to the cover body; and

[0010] An elastic member, the first end of the elastic member is connected to the second end of the connecting rod, and the second end of the elastic member is connected to the base.

[0011] In one embodiment, the base is detachably and fixedly connected to the chassis without the need for tools.

[0012] In one embodiment, the base is fixedly connected to the chassis through a snap structure.

[0013] In one embodiment, the connecting device further has a connecting sleeve, the connecting sleeve is connected to the cover body, and the first end of the connecting rod is movably connected to the connecting sleeve.

[0014] In one embodiment, one of the outer wall of the connecting sleeve and the cover body is provided with a groove, and the other is provided with a protrusion that cooperates with the groove, and the connecting sleeve and the cover body are connected to each other through the cooperation of the groove and the protrusion.

[0015] In one embodiment, the cover body is provided with a mounting hole, and the mounting hole is composed of two circular holes with different diameters that communicate with each other and intersect, and the connecting sleeve is installed in the circular hole with a smaller diameter.

[0016] In one embodiment, the interior of the connecting sleeve is provided with a hollow space, and the hollow space is respectively a receiving portion, a necking portion, and an opening portion that communicate with each other from top to bottom, wherein the diameter of the necking portion is reduced relative to the diameter of the receiving portion and the diameter of the opening portion.

[0017] In one embodiment, the head of the connecting rod is spherical, and the receiving portion is spherical and matches the head of the connecting rod.

[0018] In one embodiment, the base is provided with a hook, the chassis is provided with a slot, and the base is fixed to the chassis through the cooperation of the hook and the slot.

[0019] In one embodiment, the base has a plate-shaped main body, elastic arms extend from opposite sides of the plate-shaped main body respectively, and hooks are provided at the ends of the elastic arms.

[0020] In one embodiment, a reinforcing rib is provided between the elastic arm and the plate-shaped main body.

[0021] In one embodiment, the base has a plate-shaped main body, the chassis is provided with a receiving cavity, the receiving cavity has an open end, and the plate-shaped main body covers the open end.

[0022] In one embodiment, the connecting rod is further movably installed on the chassis, the base is located below the connecting rod, and the elastic member is installed between the connecting rod and the base.

[0023] In one embodiment, an installation wall is provided on the outer edge of the chassis, the installation wall has a through hole passing through it, and the connecting rod has a head, a rod portion, and a shoulder from top to bottom in sequence, wherein the head is movably connected to the cover body, the rod portion passes through the through hole, the shoulder is located below the installation wall, and the first end of the elastic member is connected to the end of the connecting rod below the shoulder, and the second end of the elastic member is connected to the base.

[0024] In one embodiment, a neck is provided between the head and the rod portion of the connecting rod. The head is spherical, the rod portion is cylindrical, and the diameter of the neck is smaller than the diameter of the head.

[0025] In one embodiment, the upper surface of the shoulder is spherical, and the lower surface of the mounting wall is spherical.

[0026] In one embodiment, a mounting post extends from the lower surface of the shoulder, and a convex post extends from the upper surface of the base. The first end of the elastic member is mounted on the mounting post, and the second end of the elastic member is mounted on the convex post.

[0027] In one embodiment, the connecting rod is further movably mounted on the chassis. The base is provided with a through hole. The first end of the elastic member passes through the through hole and is connected to the second end of the connecting rod, and the second end of the elastic member is connected to the lower end of the base.

[0028] In one embodiment, the connecting rod sequentially has a head, a rod portion, and a helical portion from top to bottom. The head is movably connected to the cover body. The rod portion is rod-shaped. The helical portion is provided with a helical groove. The first end of the elastic member cooperates with the helical groove so that the elastic member is connected to the connecting rod.

[0029] In one embodiment, a protrusion radially protruding from the outer wall of the helical portion is provided at the top end of the helical portion, and the inside of the helical portion is hollow and provided with a recess penetrating the outer wall of the helical portion.

[0030] In one embodiment, the base has a plate-shaped main body. Elastic arms extend downward from opposite sides of the lower surface of the plate-shaped main body. Hooks are provided at the ends of the elastic arms. The chassis is provided with a card slot. The hooks are snap-fitted with the card slot. A through hole is provided in the middle of the plate-shaped main body. The first end of the elastic member passes through the through hole and is connected to the second end of the connecting rod, and the second end of the elastic member is connected to the lower end of the base.

[0031] In one embodiment, a convex post also integrally extends from the lower surface of the plate-shaped main body, and the bottom surface of the convex post presses against the bottom of the elastic member.

[0032] In one embodiment, the elastic member is a spring. The spring has a main body portion and a bottom portion located below the main body portion. The main body portion passes through the through hole and is fixedly connected to the second end of the connecting rod, and the bottom portion is located below the through hole and abuts against the base.

[0033] In one embodiment, the spring is integrally formed by the main body portion and the bottom portion.

[0034] In one embodiment, the outer diameter of the main body portion of the spring is smaller than the inner diameter of the through hole of the base, and the inner diameter of the through hole of the base is smaller than the outer diameter of the bottom of the spring.

[0035] In one embodiment, the main body portion is configured as a close-coiled helical cylindrical spring, and the bottom portion is configured as a conical spring, a flat spiral spring, or a helical cylindrical spring.

[0036] In one embodiment, the connecting device further includes a rubber sleeve. The connecting rod is further provided with a groove portion between the rod portion and the spiral portion. The groove portion is provided with an annular groove, and the base has a plate-shaped main body and a boss integrally protruding upward from the plate-shaped main body. The outer side wall of the boss is provided with a groove. Wherein, the bottom end of the rubber sleeve is connected to the groove of the boss, and the top end of the rubber sleeve is connected to the annular groove of the connecting rod.

[0037] In one embodiment, the connecting device further includes a rubber sleeve. The top end of the rubber sleeve is fixedly connected to the connecting rod, the bottom end of the rubber sleeve is fixedly connected to the upper end of the base, and the rubber sleeve at least surrounds the part of the elastic member extending above the base.

[0038] In one embodiment, the rubber sleeve is in a bellows shape.

[0039] In one embodiment, the elastic member is a spring.

[0040] The present application also provides an assembly method for a lawn mower. The lawn mower includes a cover body and a chassis located below the cover body. Wherein, the cover body is movably connected to the chassis through a connecting device. The assembly method includes the following steps:

[0041] S1. Prepare the connecting device, where the connecting device includes a base, a connecting rod, and an elastic member;

[0042] S2. Assemble the base, the connecting rod, and the elastic member together, where the base can be installed on the chassis without tools;

[0043] S3. Connect the connecting rod and the cover body to each other without tools.

[0044] In one embodiment, the connecting device further includes a connecting sleeve, and the assembly method further includes installing the connecting sleeve on the cover body.

[0045] In one embodiment, the connecting device further includes a connecting sleeve, and the assembling method further includes installing the connecting sleeve on the cover body. In step S2, first, the base, the elastic member, and the connecting rod are assembled together from bottom to top in sequence, and then the base is snapped onto the chassis. In step S3, the cover body is placed above the chassis and pressed downward, and the connecting sleeve is sleeved on the connecting rod.

[0046] In one embodiment, the connecting device further includes a rubber sleeve, and the elastic member is a spring. In step S2, first, the spring is installed on the base, then the base is snapped onto the chassis. Next, the rubber sleeve is sleeved outside the spring and the bottom end of the rubber sleeve is installed on the base. Then, the connecting rod is inserted into the first end of the spring and tightened. Finally, the upper end of the rubber sleeve is connected to the connecting rod. In step S3, the cover body is placed above the chassis and pressed downward, and the connecting sleeve is sleeved on the connecting rod.

[0047] The lawn mower of the present application is convenient to assemble, and the cover body can be movably installed on the chassis without tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a perspective view of a lawn mower according to an embodiment of the present invention.

[0049] Figure 2 is an exploded perspective view of a lawn mower according to an embodiment of the present invention.

[0050] Figure 3 is an exploded perspective view of a connecting device between a cover body and a chassis of a lawn mower according to an embodiment of the present invention.

[0051] Figure 4 is a bottom view of a lawn mower according to an embodiment of the present invention.

[0052] Figure 5 is along Figure 4 the sectional view taken along the section line A-A in

[0053] Figure 6 is Figure 5 an enlarged view of part B in

[0054] Figure 7 is Figure 1 an exploded perspective view of a part of the cover body of the lawn mower, showing the connection structure between the connecting sleeve and the cover body.

[0055] Figure 8 is a top view of a connecting sleeve according to an embodiment of the present invention.

[0056] Figure 9 is alongFigure 8 A sectional view taken along the sectional line C-C in the middle.

[0057] Figure 10 It is a top view of a chassis according to an embodiment of the present invention.

[0058] Figure 11 It is along Figure 10 A partial cutaway perspective view taken along the sectional line D-D in

[0059] Figure 11A It is Figure 11 An enlarged view of part G in

[0060] Figure 12 It is a perspective view of a lawn mower according to another embodiment of the present invention.

[0061] Figure 13 It is Figure 12 A top view of the chassis of the lawn mower.

[0062] Figure 14 It is an exploded perspective view of a connecting device between a cover body and a chassis of a lawn mower according to another embodiment of the present invention.

[0063] Figure 15 It is Figure 14 A perspective view of the spring in

[0064] Figure 16 It is Figure 12 A bottom view of the lawn mower.

[0065] Figure 17 It is along Figure 16 A sectional view taken along the sectional line E-E in

[0066] Figure 18 It is Figure 17 An enlarged view of part F in Detailed implementation manners

[0067] The following will describe each embodiment of the present invention in detail with reference to the accompanying drawings, so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present invention, but only to illustrate the essential spirit of the technical solution of the present invention.

[0068] In the following description, certain specific details are set forth for the purpose of explaining various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail so as not to unnecessarily obscure the description of the embodiments.

[0069] Unless the context requires otherwise, throughout the specification and claims, the words "comprising" and its variations such as "including" and "having" shall be understood in an open, inclusive sense, i.e., shall be interpreted as "including, but not limited to".

[0070] References to "an embodiment" or "one embodiment" in the specification throughout mean that the particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in an embodiment" or "in one embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0071] As used in this specification and the appended claims, the singular forms "a" and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally used in its inclusive sense of "and / or" unless the context clearly dictates otherwise.

[0072] In the following description, in order to clearly show the structure and working mode of the present invention, many directional terms will be used for description. However, terms such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as limiting terms.

[0073] As Figures 1 - 2 shown, the lawn mower 100 includes a cover body 10 and a chassis 20 movably connected to the cover body 10. Driving wheels 201 and driven wheels 202 are provided on the chassis 20. The driving wheels 201 and the driven wheels 202 are generally located at the front and rear ends of the lawn mower respectively. The driving wheels 201 are used to drive the lawn mower 100 to move and are connected to a driving motor or have a driving motor therein. A cutting assembly 203 for mowing is installed at the bottom of the chassis 20 (see Figure 4 ). A control device (not shown in the figure) for controlling the operation of the lawn mower and a battery assembly (not shown in the figure) for supplying power to the lawn mower are also installed in the chassis. The structures of the driving wheels 201, the driven wheels 202, the cutting assembly, the control device, and the battery assembly can all adopt known existing technologies or technologies to be developed, and no detailed description of these structures will be given here.

[0074] The cover body 10 is movably connected to the chassis 20 through a connecting device 30, so that the cover body can move relative to the chassis, for example, displacement occurs. The chassis 20 is provided with a motion detection device, which is particularly adapted to detect the displacement of the cover body, so as to detect the motion when the cover body 10 moves relative to the chassis 20, such as displacement, and transmit the relevant signal to the control device, so that when the lawn mower is, for example, impacted or lifted manually, the control device can make corresponding responses to control the operation of the lawn mower, such as stopping working or backing up. In an embodiment, the motion detection device includes a permanent magnet (not shown in the figure) and a magnetic induction element (usually a Hall element, not shown in the figure) respectively arranged at corresponding positions of the cover body 10 and the chassis 20. When a collision occurs, the cover body leaves the initial position, and the magnetic induction element arranged on the chassis senses that the position of the permanent magnet arranged on the cover body changes, that is, a signal representing the collision event is output to the control device, so as to control the operation of the lawn mower. The above-mentioned motion detection device and control device are common technical means in the art, and they can adopt known existing technologies or technologies to be developed, and no detailed description will be given here.

[0075] As Figures 3 - 6 shown, in this embodiment, the connecting device 30 has a connecting sleeve 301, a connecting rod 302, a spring 303 and a base 304. The connecting sleeve 301 is detachably connected to the cover body 10. The first end of the connecting rod 302 is movably connected to the connecting sleeve 301. In the embodiment shown in the figure, the first end of the connecting rod 302 is the upper end of the connecting rod 302. The connecting rod 302 is also movably installed on the chassis 20. The base 304 is fixedly connected to the chassis 20 and is located below the connecting rod 302. The spring 303 is installed between the connecting rod 302 and the base 304. The spring 303 is used to drive the cover body 10 to reset relative to the chassis 20 after a collision. Through the connecting device 30, when the cover body 10 is impacted or lifted manually, the cover body 10 can displace and / or rotate relative to the chassis 20 in the horizontal direction and / or the vertical direction. Specifically, the connecting rod 302 can rotate relative to the connecting sleeve 301, and thus relative to the cover body 10. The connecting rod 302 can also rotate relative to the chassis 20. Thus, the cover body 10 can rotate relative to the chassis 20. Further, the connecting rod 302 can also move up and down in the vertical direction relative to the chassis 20, so that the cover body 10 can move up and down in the vertical direction relative to the chassis 20.

[0076] Specifically, referring to Figures 6 - 9, the connecting sleeve 301 is generally cylindrical. An annular groove 3011 is provided on the outer peripheral wall of the connecting sleeve 301. A hollow space is provided inside the connecting sleeve 301. The hollow space is respectively a receiving portion 3012 and an opening portion 3013 that opens downward from top to bottom. The receiving portion 3012 and the opening portion 3013 communicate with each other and a necking portion 3014 is provided therebetween. The receiving portion 3012 is a generally spherical hollow space. The opening portion 3013 is a conical hollow space. The size (diameter) of the necking portion 3014 is narrowed relative to the receiving portion 3012 and is also narrowed relative to the opening portion 3013. Thus, the head of the connecting rod 302 can sequentially pass through the opening portion 3013 and the necking portion 3014 and be rotatably received in the receiving portion 3012, so that the connecting rod 302 is rotatably connected to the connecting sleeve 301. The conical space of the opening portion 3013 allows the connecting rod to swing within this space. A vent hole 3015 may also be provided at the top end of the connecting sleeve.

[0077] As Figure 7 shown, an installation hole 101 is provided on the cover body 10. The installation hole 101 is composed of two circular holes with different diameters that communicate with each other and intersect. The diameter of the larger large circular hole 1011 is slightly larger than the outer diameter of the non-grooved portion of the connecting sleeve 301, and the diameter of the smaller small circular hole 1012 is smaller than the outer diameter of the non-grooved portion of the connecting sleeve and is slightly larger than the outer diameter of the grooved portion. Thus, during assembly, the connecting sleeve 301 first enters the large circular hole 1011 along the axial direction, and then the connecting sleeve 301 moves radially towards the small circular hole 1012, so that the annular groove 3011 thereon is snapped into the protruding portion 102 on the cover body 10, thereby completing the installation of the connecting sleeve 301. Preferably, the connecting sleeve 301 is made of an elastic material such as a rubber material. It should be understood that the connecting sleeve 301 may also be made of other elastic materials such as plastic materials.

[0078] In other embodiments, a groove may also be provided on the cover body, and an annular protruding portion may be provided on the outer wall of the connecting sleeve, and the connecting sleeve is installed on the cover body through the cooperation of the annular protruding portion and the groove. The connecting sleeve 301 may also be installed on the cover body in other ways. For example, the connecting sleeve is provided with a snap structure and is installed on the cover body 10 by means of snapping. In another embodiment, the connecting sleeve may not be provided separately, but a structure similar to the receiving portion, the opening portion, and the necking portion on the above-mentioned connecting sleeve 301 is integrally formed on the cover body.

[0079] As Figure 2 and Figure 6As shown, the connecting rod 302 successively has a head 3021, a rod portion 3022, and a shoulder 3023 from top to bottom. The head 3021 is provided at the top end of the connecting rod 302 and is spherical. The rod portion 3022 is rod-shaped, and its cross-section is preferably circular. The diameter of the head 3021 is greater than that of the rod portion 3022. There is a neck 3024 between the head 3021 and the rod portion 3022. The neck 3024 tapers relative to the rod portion, that is, the diameter of the neck 3024 is smaller than that of the rod portion. The shoulder 3023 extends radially outward along the outer sidewall of the rod portion 3022 and is formed into a substantially circular ring shape. Preferably, the upper surface of the shoulder 3023 is constructed as at least a part of a spherical surface. The lower surface of the shoulder 3023 is recessed to facilitate receiving the spring 303. A spring connection portion 3025 extends from the lower surface of the shoulder 3023, which is used to mount the first end of the spring 303. In the illustrated embodiment, the first end of the spring 303 is the upper end of the spring 303, and the second end of the spring 303 is the lower end of the spring 303. In this embodiment, the spring connection portion 3025 is located at the lower end of the connecting rod below the shoulder, that is, at the second end of the connecting rod, specifically, a mounting post integrally extending from the lower surface of the shoulder 3023. It should be understood that the spring connection portion 3025 can also adopt other structures as long as it can be connected to one end of the spring 303. The spring 303 can also be replaced by other elastic members as long as it can drive the cover body 10 to reset relative to the chassis 20 after a collision.

[0080] As Figure 2 and Figure 6 , Figure 11A As shown, a plurality of chassis connection portions 204 are provided on the chassis 20. The chassis connection portions 204 are located at the outer edge of the chassis. Each chassis connection portion 204 has a mounting wall 2041 integrally formed on the chassis 20. A through hole 2042 for the connecting rod 302 to pass through is provided in the middle of the mounting wall 2041. The lower surface of the mounting wall 2041 is constructed as at least a part of a spherical surface, which is adapted to the upper surface of the shoulder 3023 of the connecting rod 302, so that when the cover body is displaced, the upper surface of the shoulder can move relative to the lower surface of the mounting wall 2041. A receiving cavity 2043 is provided below the mounting wall 2041 for receiving the spring 303. Card slots 2044 are provided on both sides of the receiving cavity 2043, which are constructed to cooperate with the hooks on the base 304, so as to fix the base 304 to the chassis 20 and position the spring 303 in the receiving cavity 2043.

[0081] See Figure 3 and Figure 6, the base 304 has a plate-shaped main body 3041. The shape of the plate-shaped main body 3041 is set to match the shape of the open end of the receiving cavity 2043, so as to cover the opening end of the receiving cavity after assembly. In this embodiment, the open end is the lower end of the receiving cavity. In the middle of the upper surface of the plate-shaped main body 3041, there is a spring mounting portion 3042, which is a convex column protruding integrally upward from the plate-shaped main body 3041. On the upper surface of the plate-shaped main body 3041, elastic arms 3043 extend upward respectively on opposite sides. At the end of the elastic arm 3043, there is a hook 3044. The hook 3044 and the card slot 2044 of the chassis together form a snap structure to snap the base onto the chassis. A reinforcing rib 3045 is connected between the elastic arm 3043 and the plate-shaped main body 3041.

[0082] As Figure 6 shown, the upper end of the spring 303 is connected to the spring connection portion 3025 of the connecting rod 302, and the lower end is mounted on the spring mounting portion 3042 of the base. In this embodiment, the cover body 10 and the chassis 20 are interconnected by 4 connecting devices 30. It should be understood that other numbers of connecting devices 30 can be used as needed to interconnect the cover body 10 and the chassis 20, such as 3, 5 or more.

[0083] The steps of assembling the cover body 10 and the chassis 20 using the above-mentioned connecting device 30 are as follows:

[0084] S1. Install the connecting sleeve on the cover body, and assemble the base, the spring and the connecting rod together from bottom to top, with both ends of the spring connected to the base and the connecting rod respectively;

[0085] S2. Insert the head of each connecting rod upward from below into the chassis connecting portion and pass through the through hole of the mounting wall until the shoulder of the connecting rod abuts against the lower surface of the mounting wall of the chassis connecting portion, and the hook of the base is engaged with the card slot of the chassis;

[0086] S3. Place the cover body above the chassis, align the connecting sleeve with the head of the connecting rod and press down to make the head enter the receiving portion, thus completing the assembly.

[0087] During the above installation process, the connection between the base, the connecting rod and the spring does not have fasteners such as screws that require specific tools for assembly and disassembly. The assembly and disassembly are convenient and tool-free. Here, tool-free assembly and disassembly means that no external tools are needed during assembly and disassembly, and only hands are required to complete the assembly and disassembly. In addition, due to the relatively simple structure of the connecting device, it runs more reliably and has a lower cost.

[0088] After assembly, the head of the connecting rod can rotate relative to the connecting sleeve, the shoulder of the connecting rod can rotate relative to the chassis, and the connecting rod can move up and down along the through hole of the mounting wall. Thus, during the operation of the lawn mower, when an abnormal situation occurs to the cover of the lawn mower, such as when it collides with a foreign object or is lifted manually, the cover can move relative to the chassis, such as translating and / or rotating, thereby triggering the control device to perform corresponding actions to control the lawn mower to stop working or move backward. Further, when the abnormal situation of the lawn mower is eliminated, through the reset action of the spring, the lawn mower can return to the normal working state.

[0089] Figures 12 - 18 A lawn mower 200 showing another embodiment of the present invention. The main differences between this embodiment and Figures 1 - 11A the embodiment shown lie in the structure of the connecting device and the corresponding structures of the cover and the chassis. Therefore, for clarity, the connecting device 40 and related structures of this embodiment are mainly described here, and other structures will not be described again.

[0090] As Figure 14 and Figure 18 shown, the connecting device 40 has a connecting sleeve 401, a connecting rod 402, a spring 403, a base 404, and a rubber sleeve 405. The connecting sleeve 401 is detachably connected to the cover 10. The first end of the connecting rod 402 is movably connected to the connecting sleeve 401. The connecting rod 402 is also movably mounted on the chassis 60 through the spring 403. The base 404 is fixedly connected to the chassis 60 and is provided with a through hole 4044. The first end of the spring 403 passes through the through hole 4044 from bottom to top and is connected to the second end of the connecting rod 402. In the embodiment shown in the figure, the first end of the connecting rod 402 is the upper end of the connecting rod 402, and the second end of the connecting rod 402 is the lower end of the connecting rod 402. The second end of the spring abuts against the lower end of the base 404. In the embodiment shown in the figure, the first end of the spring 403 is the upper end of the spring 403, and the second end of the spring 403 is the lower end of the spring 403. The spring 403 is used to drive the cover 50 to reset relative to the chassis 60 after a collision. The lower end of the rubber sleeve 405 is connected to the upper end of the base 404, and the upper end is connected to the connecting rod 402. The rubber sleeve at least surrounds the part of the spring 403 extending above the base 404. The rubber sleeve 405 mainly functions to prevent dust. It should be understood that the rubber sleeve can also be removed.

[0091] Through the connecting device 40, when the cover body 50 is impacted or manually lifted, the cover body 50 can translate and / or rotate relative to the chassis 60 in the horizontal direction and / or the vertical direction. Specifically, the connecting rod 402 can rotate relative to the connecting sleeve 401, and thus rotate relative to the cover body 50. The connecting rod 402 can also rotate relative to the chassis 60. Thereby, the cover body 50 can translate and / or rotate relative to the chassis 60. Further, the connecting rod 402 can also translate in the vertical direction relative to the chassis 60, so that the cover body 50 can translate in the vertical direction relative to the chassis 60.

[0092] Specifically, the structures of the corresponding mounting holes 501 on the connecting sleeve 401 and the cover body 50 are respectively the same as Figures 1 - 11 the structures and mounting manners of the connecting sleeve 301 and the mounting hole 101 shown in the illustrated embodiment, and will not be described in detail herein. Similarly, in this embodiment, the connecting sleeve 401 is preferably made of rubber. The connecting sleeve 401 can also adopt different structures. For example, the connecting sleeve is provided with a snap structure and is mounted on the cover body 50 by a snap-fitting manner. In another embodiment, the connecting sleeve may not be provided separately, but the structures similar to the receiving portion, the opening portion, and the necking portion on the above-mentioned connecting sleeve 401 are integrally formed on the cover body.

[0093] As Figure 14 and Figure 18 shown, the connecting rod 402 successively has a head 4021, a rod portion 4022, a groove portion 4023, and a spiral portion 4024 from top to bottom. The head 4021 is provided at the top end of the connecting rod 402 and is spherical. The rod portion 4022 is rod-shaped, and its outer wall is provided with reinforcing ribs 4025. The groove portion 4023 is located at the lower end of the rod portion 4022 and has an annular groove 4026. The spiral portion 4024 is located below the groove portion 4023 and is cylindrical. The spiral portion 4024 is used for mounting the spring 403. The outer wall of the spiral portion 4024 is provided with a spiral groove 4027. The top end of the spiral portion 4024 is provided with a protrusion 4028 radially protruding from the outer wall of the spiral portion. The protrusion 4028 is used to abut against the end face of the spring when the spring is tightened, ensuring that the tightening degrees of each spring (different springs on the same machine, springs on different machines) are consistent. The inside of the spiral portion 4024 is hollow and is provided with a recess 4029 penetrating the outer wall of the spiral portion. The recess 4029 is used for the outer diameter of the connecting rod 402 to shrink when a force is applied. Specifically, when not under force, the outer diameter of the connecting rod 402 is slightly larger than the inner diameter of the spring. When connecting, the outer diameter of the connecting rod decreases under force, and the spring can be sleeved outside the connecting rod and tightened. Due to the elasticity of the connecting rod itself, the spring can be clamped to prevent loosening.

[0094] As Figure 13 and Figure 18As shown, a plurality of chassis connection parts 601 are provided on the chassis 60. The chassis connection parts 601 are located at the outer edge of the chassis. Each chassis connection part 601 has a receiving cavity 6021 formed integrally with the opening of the chassis 60, which is a concave cavity. The middle part of the receiving cavity 6021 has a convex column 6022. The lower end of the spring 403 is sleeved on the convex column 6022 and is in interference fit with the convex column 6022. On both sides of the receiving cavity 6021, there are card slots 6023, which are configured to cooperate with the hooks on the base 404, so as to fix the base 404 to the chassis 60 and position the lower end of the spring 403 in the receiving cavity 6021, which will be further described below.

[0095] Continue to refer to Figure 14 and Figure 18 , the base 404 has a plate-shaped main body 4041. The shape of the plate-shaped main body 4041 is set to match the shape of the open end of the receiving cavity 6021, so as to cover the open end of the receiving cavity after assembly. In this embodiment, the open end is the upper end of the receiving cavity. In the middle of the upper surface of the plate-shaped main body 4041, there is a groove part 4042, which is a boss protruding integrally upward from the plate-shaped main body 4041. The outer side wall of the boss is provided with a groove 4043 for installing the rubber sleeve 405. In the middle of the lower surface of the plate-shaped main body, a convex column 4045 also extends integrally. During assembly, the bottom surface of the convex column 4045 presses against the bottom of the spring 403. A through hole 4044 is provided in the middle of the plate-shaped main body 4041 for the spring 403 to pass through. The through hole 4044 penetrates the above-mentioned boss and the convex column 4045. On the lower surface of the plate-shaped main body 4041, elastic arms 4046 extend downward on opposite sides respectively, and hooks 4047 are provided at the ends of the elastic arms 4046. The hooks 4047 and the card slots 6023 on the chassis together form a snap structure to snap the base onto the chassis.

[0096] As Figure 14As shown, the spring 403 is of an integral structure, including a main body portion 4031 and a bottom portion 4032 located below the main body portion. The main body portion 4031 is configured as a closely wound helical cylindrical spring, and its inner diameter is adapted to the helical groove of the helical portion of the connecting rod 402. The bottom portion 4032 is configured as a conical or planar scroll spring, or a helical cylindrical spring. The outer diameter of the main body portion 4031 of the spring 403 is smaller than the inner diameter of the through hole 4044 of the base 404, and the inner diameter of the through hole of the base 404 is smaller than the outer diameter of the bottom portion of the spring 403. Thus, the upper end of the spring 403 can pass through the through hole 4044 of the base 404 to be connected to the helical portion of the connecting rod 402, and the lower end of the spring 403 is located below the through hole 4044 and its bottom portion abuts against the boss 4045 of the base 404. In other embodiments, the spring can be made of other elastic materials (such as rubber), an internal thread is provided at the upper end of the main body portion of the spring, and a mating external thread is provided at the fixing portion of the connecting rod. In other embodiments, the main body portion and the bottom portion of the spring 403 can also be separately formed and then connected together by means such as welding. At this time, the bottom portion of the spring 403 can be, for example, a disc or a ring. The spring 403 can also be replaced by other elastic members as long as it can drive the cover body to reset relative to the chassis after a collision.

[0097] Continue to refer to Figure 14 , the rubber sleeve 405 is in a bellows shape, and the diameter of its bottom end is larger than that of the rest of the part. The rubber sleeve 405 is sleeved outside the spring 403. The bottom end of the rubber sleeve 405 is connected to the groove 4043 of the boss of the base 404, and its top end is connected to the groove 4026 of the groove portion 4023 of the connecting rod 402. Thus, the rubber sleeve 405 can play a role in sealing and protecting the spring. In other embodiments, the rubber sleeve can also be cancelled.

[0098] In this embodiment, the cover body 50 and the chassis 60 are interconnected by 4 connecting devices 40. It should be understood that other numbers of connecting devices 40 can be used to interconnect the cover body 50 and the chassis 60 as needed, such as 3, 5 or more.

[0099] The steps of assembling the cover body 50 and the chassis 60 using the above connecting device 40 are as follows:

[0100] S1. Install the connecting sleeve on the cover body, and pass the main body portion of the spring through the through hole of the base from below the base, so that the bottom portion of the spring abuts against the bottom surface of the boss of the base;

[0101] S2. Snap the base downward into the card slot of the chassis, and sleeve the rubber sleeve on the main body portion of the spring, so that the lower end of the rubber sleeve is connected to the boss at the upper end of the base;

[0102] S3. Insert the helical portion of the connecting rod into the upper end of the main body portion of the spring and tighten it, and make the upper end of the rubber sleeve connected to the groove of the connecting rod;

[0103] S4. Place the cover body above the chassis, align the connecting sleeve with the head of the connecting rod and press downwards so that the head enters the receiving portion, thus completing the assembly.

[0104] After the chassis and the connecting member are assembled, the bottom of the spring is clamped between the base and the chassis connecting portion. At this time, both the upper and lower ends of the spring are fastened. During the above installation process, there are no fasteners such as screws in the connection between the base, the connecting rod and the spring. The assembly is convenient and no tools are required for assembly. In addition, due to the relatively simple structure of the connecting device, the operation is more reliable and the cost is lower.

[0105] After the assembly is completed, the head of the connecting rod can rotate relative to the connecting sleeve and the spiral portion of the connecting rod can move up and down or rotate against the elastic force of the spring. Thus, the connecting rod can rotate relative to the chassis and / or move up and down, left and right. Thus, when the cover body of the lawn mower encounters an abnormal situation during the working process of the lawn mower, for example, when it collides with a foreign object or is lifted manually, the cover body can move relative to the chassis, such as translation and / or rotation, thereby triggering the control device to perform corresponding actions to control the lawn mower to stop working or retreat. Further, when the abnormal situation of the lawn mower is removed, the lawn mower can return to the normal working state through the reset action of the spring.

[0106] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that if necessary, aspects of the embodiments can be modified to adopt aspects, features and concepts of various patents, applications and publications to provide additional embodiments.

[0107] In view of the above detailed description, these and other changes can be made to the embodiments. Generally speaking, in the claims, the terms used should not be construed as limited to the specific embodiments disclosed in the specification and the claims, but should be understood to include all possible embodiments together with the full scope of equivalents enjoyed by these claims.

Claims

1. A lawn mower, the lawn mower comprising a cover body and a chassis located below the cover body, wherein, The cover body is movably connected to the chassis through a connecting device, characterized in that the connecting device comprises: a base, the base being detachably and fixedly connected to the chassis; a connecting rod, a first end of the connecting rod being movably coupled to the cover body; and an elastic member, a first end of the elastic member being connected to a second end of the connecting rod, and a second end of the elastic member being connected to the base; The connecting device is further provided with a connecting sleeve, the connecting sleeve being connected to the cover body, and the first end of the connecting rod being movably connected to the connecting sleeve; The connecting rod is further movably mounted on the chassis, the base is provided with a through hole, the first end of the elastic member passes through the through hole and is connected to the second end of the connecting rod, and the second end of the elastic member is connected to the lower end of the base; The connecting rod can rotate relative to the connecting sleeve, the connecting rod can also rotate relative to the chassis, and the connecting rod can also move up and down in the vertical direction relative to the chassis.

2. The lawn mower according to claim 1, characterized in that, The base can be detachably and fixedly connected to the chassis without tools.

3. The lawn mower according to claim 1, characterized in that, The base is fixedly connected to the chassis through a snap structure.

4. The lawn mower according to claim 1, characterized in that, One of the outer wall of the connecting sleeve and the cover body is provided with a groove, and the other is provided with a protrusion that cooperates with the groove, and the connecting sleeve and the cover body are connected to each other through the cooperation of the groove and the protrusion.

5. The lawn mower according to claim 1, characterized in that, The base is provided with a hook, the chassis is provided with a slot, and the base is fixed to the chassis through the cooperation of the hook and the slot.

6. The lawn mower according to claim 1, wherein, The base has a plate-shaped main body, elastic arms extend from opposite sides of the plate-shaped main body respectively, and hooks are provided at the ends of the elastic arms.

7. The lawn mower according to claim 1, characterized in that, The base has a plate-shaped main body, the chassis is provided with a receiving cavity, the receiving cavity has an open end, and the plate-shaped main body covers the open end.

8. The lawn mower according to claim 1, characterized in that, The base is located below the connecting rod, and the elastic member is installed between the connecting rod and the base.

9. The lawn mower according to claim 1, characterized in that, An installation wall is provided at the outer edge of the chassis, the installation wall has a through hole penetrating it, and the connecting rod sequentially has a head, a rod portion and a shoulder from top to bottom, wherein the head is movably coupled to the cover body, the rod portion passes through the through hole, the shoulder is located below the installation wall, and the first end of the elastic member is connected to the end of the connecting rod below the shoulder, and the second end of the elastic member is connected to the base.

10. The lawn mower according to claim 9, characterized in that, An installation post extends from the lower surface of the shoulder, and a convex post extends from the upper surface of the base, wherein the first end of the elastic member is installed on the installation post, and the second end of the elastic member is installed on the convex post.

11. The lawn mower according to claim 1, characterized in that, The connecting rod sequentially has a head, a rod portion and a spiral portion from top to bottom, wherein the head is movably connected to the cover body, the rod portion is rod-shaped, the spiral portion is provided with a spiral groove, and the first end of the elastic member cooperates with the spiral groove so that the elastic member is connected to the connecting rod.

12. The lawn mower according to claim 11, characterized in that, A protrusion radially protruding from the outer wall of the spiral portion is provided at the top of the spiral portion, and the inside of the spiral portion is hollow and provided with a recess penetrating the outer wall of the spiral portion.

13. The lawn mower according to claim 1, characterized in that, The base has a plate-shaped main body. On opposite sides of the lower surface of the plate-shaped main body, an elastic arm extends downward respectively. A hook is provided at the end of the elastic arm, and a slot is provided on the chassis. The hook is in snap-fit with the slot. A through hole is provided in the middle of the plate-shaped main body. The first end of the elastic member passes through the through hole and is connected to the second end of the connecting rod, and the second end of the elastic member is connected to the lower end of the base.

14. The lawn mower according to claim 13, characterized in that, A convex column also integrally extends from the lower surface of the plate-shaped main body. The bottom surface of the convex column presses against the bottom of the elastic member.

15. The lawn mower according to claim 13, characterized in that, The elastic member is a spring. The spring has a main body portion and a bottom portion located below the main body portion. The main body portion passes through the through hole and is fixedly connected to the second end of the connecting rod, and the bottom portion is located below the through hole and abuts against the base.

16. The lawn mower according to claim 15, characterized in that, The spring is integrally formed by the main body portion and the bottom portion.

17. The lawn mower according to claim 15, characterized in that, The outer diameter of the main body portion of the spring is smaller than the inner diameter of the through hole of the base, and the inner diameter of the through hole of the base is smaller than the outer diameter of the bottom portion of the spring.

18. The lawn mower according to claim 15, characterized in that, The main body portion is configured as a close-coiled helical cylindrical spring, and the bottom portion is configured as a conical spring, a flat spiral spring, or a helical cylindrical spring.

19. The lawn mower according to claim 11, wherein, The connecting device further includes a rubber sleeve. A groove portion is further provided on the connecting rod between the rod portion and the spiral portion. An annular groove is provided in the groove portion. The base has a plate-shaped main body and a convex platform integrally protruding upward from the plate-shaped main body. A groove is provided on the outer side wall of the convex platform. The bottom end of the rubber sleeve is connected to the groove of the convex platform, and the top end of the rubber sleeve is connected to the annular groove of the connecting rod.

20. The lawn mower according to claim 1, characterized in that, The connecting device further includes a rubber sleeve. The top end of the rubber sleeve is fixedly connected to the connecting rod. The bottom end of the rubber sleeve is fixedly connected to the upper end of the base. The rubber sleeve at least surrounds the part of the elastic member extending above the base.

21. The lawn mower according to any one of claims 1 to 20, characterized in that, The elastic member is a spring.

22. An assembly method of a lawn mower, the lawn mower being the lawn mower according to any one of claims 1-21, comprising a cover body and a chassis located below the cover body, wherein, The cover body is movably connected to the chassis through a connecting device. The assembly method is characterized by including the following steps: S1. Prepare the connecting device, where the connecting device includes a base, a connecting rod, and an elastic member; S2. Assemble the base, the connecting rod, and the elastic member together, where the base can be installed on the chassis without tools; S3. Connect the connecting rod and the cover body to each other without tools; The connecting device further includes a connecting sleeve. The assembly method further includes installing the connecting sleeve on the cover body. In step S2, first assemble the base, the elastic member, and the connecting rod together from bottom to top, and then snap the base to the chassis. In step S3, place the cover body above the chassis and press it downward. The connecting sleeve is sleeved on the connecting rod. The connecting rod can rotate relative to the connecting sleeve, and the connecting rod can also rotate relative to the chassis.

23. The assembly method according to claim 22, characterized in that, The connecting device further includes a rubber sleeve, and the elastic member is a spring. Wherein, in step S2, first install the spring onto the base, then snap the base onto the chassis, then sleeve the rubber sleeve outside the spring and make the bottom end of the rubber sleeve installed on the base, then insert the connecting rod into the first end of the spring and tighten it, and finally connect the upper end of the rubber sleeve to the connecting rod; and in step S3, place the cover body above the chassis and press it down, and the connecting sleeve is sleeved on the connecting rod.

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