Insulating structure and lawn mower

Abstract

The present invention relates to an insulation structure for an electric garden tool, comprising: a housing; a motor disposed within the housing for providing power; an output shaft; and a blade connected to the output shaft, with the motor driving the blade to rotate via the output shaft. The insulation structure is disposed between the output shaft and the blade to achieve insulated connection between the blade and the output shaft. The insulation structure includes a connecting seat comprising a main body made of insulating material, the main body being provided with an output shaft connection portion securely coupled to the output shaft, and at least two blade connection portions securely coupled to the blades. The output shaft connection portion is insulated from each of the blade connection portions. The present invention also relates to a lawn mower including the insulation structure. The present invention enables low-cost double insulation.

Description

Technical Field

[0001] The present invention relates to the technical field of electric garden tools, and in particular to an insulation structure and a lawn mower having the insulation structure. Background Art

[0002] Electric lawn mowers are the most common type of garden tools. Generally, in order to ensure the safety of lawn mowers, high-voltage AC or DC lawn mowers must meet the requirements of double insulation. Double insulation generally includes basic insulation and supplementary insulation. Among them, basic insulation is the basic protective insulation that provides protection against electric shock to live parts, such as the basic insulation of the motor itself in an electric lawn mower. Supplementary insulation is an independent insulation provided in addition to the basic insulation to prevent electric shock when the basic insulation is damaged or fails, such as the insulation between the blades of a lawn mower and the output shaft of the motor. In the prior art, due to cost and design space limitations, it is difficult to achieve double insulation between the motor, output shaft and blade assembly in most lawn mowers, resulting in safety hazards. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an insulation structure capable of achieving double insulation.

[0004] To solve the above technical problems, the present invention provides an insulating structure for an electric garden tool, which includes: a housing; a motor, which is arranged in the housing and is used to provide power; the motor includes an output shaft; a blade, which is connected to the output shaft, and the motor drives the blade to rotate through the output shaft; the insulating structure is arranged between the output shaft and the blade to achieve an insulated connection between the blade and the output shaft; wherein the insulating structure includes a connecting seat, the connecting seat includes a main body made of insulating material, the main body is provided with an output shaft connecting portion fastened to the output shaft, and at least two blade connecting portions fastened to the blade; the output shaft connecting portion and any one of the blade connecting portions are insulated and isolated from each other.

[0005] Preferably, the output shaft is fixedly connected to the output shaft connecting portion via a second fastener; and the blade is fixedly connected to the blade connecting portion via at least two first fasteners.

[0006] Preferably, the insulating structure further comprises an insulating cover made of insulating material, and the insulating cover is arranged between the second fastener and the blade to achieve insulation between the second fastener and the blade.

[0007] Preferably, the output shaft is coupled with the output shaft connecting portion from the first side of the connecting seat, and the second fastener is coupled with the output shaft after passing through the connecting seat from the second side of the connecting seat toward the first side; the insulating cover forms an inner cavity; the portion of the second fastener protruding toward the second side from the surface of the main body toward the second side is accommodated in the inner cavity, and the blade is isolated from the outside of the inner cavity.

[0008] Preferably, the insulating cover is detachably connected to the second fastener.

[0009] Preferably, the insulating cover has at least one elastic hook, the main body includes at least one slot, and the elastic hook is detachably connected to the slot.

[0010] Preferably, the insulating cover is non-detachably connected to the second fastener.

[0011] Preferably, the insulating cover has a non-standard end face.

[0012] Preferably, the output shaft is connected to the output shaft connecting portion from a first side of the connecting seat, and the blade is connected to the blade connecting portion from a second side of the connecting seat.

[0013] Preferably, the output shaft connecting portion includes an axial hole extending from the main body toward the first side and facing the second side, and the axial hole is cooperatively connected with the output shaft.

[0014] Preferably, the output shaft connecting portion is constructed to include a first cavity extending from the main body toward the first side facing the second side, and a connecting member fixedly embedded in the first cavity; the connecting member includes an axial hole extending from it toward the first side facing the second side.

[0015] Preferably, a first through hole is provided below the shaft hole; the output shaft includes a second matching hole extending from its end surface facing the second side toward the first side; the first through hole corresponds to the second matching hole; at least part of the second fastener passes through the first through hole and is connected with the second matching hole.

[0016] Preferably, the connecting piece is made of metal, and is integrally injection molded with the main body; the connecting piece includes an embedded portion and an extension portion extending from the embedded portion toward the first side, and the outer diameter of the embedded portion is greater than the outer diameter of the extension portion; the first cavity includes a chamber portion and an opening portion, the inner diameter of the chamber portion matches the outer diameter of the embedded portion, and the inner diameter of the opening portion matches the outer diameter of the extension portion.

[0017] Preferably, the blade connecting portion includes a plurality of first matching holes extending from the main body toward the second side facing the first side, and the inner periphery of the first matching holes and the outer periphery of the first fastener are provided with mutually engaging threads; the blade includes a second through hole corresponding to the first matching hole; at least part of the first fastener passes through the second through hole and is connected with the first matching hole.

[0018] Preferably, among the plurality of first matching holes, there are at least two whose connecting lines between the first matching holes and the rotation center of the main body are no longer in the same straight line.

[0019] Preferably, a peripheral wall is provided on the periphery of the main body, and a hole wall is provided on the periphery of the first matching hole; a reinforcing rib is provided on the side of the peripheral wall close to the rotation center of the main body, and the reinforcing rib extends along the circumference of the main body; multiple first matching holes divide the reinforcing rib into multiple sections, and the extension line of any section of the reinforcing rib to both ends passes through the first matching hole.

[0020] Preferably, the extension lines of any section of the reinforcing rib towards both ends pass through the geometric center of the first matching hole.

[0021] Preferably, the blade connecting portion is constructed to include a first matching hole extending from the main body toward the second side facing the first side, a second cavity arranged in the first matching hole, and a nut fixedly embedded in the second cavity; the nut is made of metal and has a thread engaged with the first fastener; the nut is injection molded as one piece with the main body.

[0022] The present invention also provides a lawn mower comprising any one of the above-mentioned insulation structures.

[0023] The technical effect that can be achieved by the present invention is to realize low-cost double insulation, and no electric shock accidents will occur when the basic insulation of the motor fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a lawn mower according to a specific embodiment of the present invention.

[0025] Figure 2 yes Figure 1 A magnified view of the L1 in the figure.

[0026] Figure 3 It is a front view of a motor, a connecting seat, a blade and their connection relationship in a lawn mower according to a specific embodiment of the present invention.

[0027] Figure 4 The present invention is a bottom view of a motor, a connecting seat, a blade and their connection relationship in a lawn mower according to a specific embodiment of the present invention.

[0028] Figure 5 yes Figure 4 Cross-sectional view along AA.

[0029] Figure 6 It is a schematic diagram of a connecting base in a lawn mower according to a specific embodiment of the present invention, wherein the upper surface is shown.

[0030] Figure 7 It is a schematic diagram of another perspective of a connecting base in a lawn mower according to a specific embodiment of the present invention, wherein the lower surface is shown.

[0031] Figure 8 It is a schematic diagram of a motor rotor in a lawn mower according to a specific embodiment of the present invention.

[0032] Figure 9 It is a schematic diagram of an insulating cover in a lawn mower according to a specific embodiment of the present invention.

[0033] Among them, 1-mower, 11-chassis, 12-motor cover, 13-battery chamber cover, 131-battery pack, 14-blade, 15-push rod, 16-travel wheel, 17-grass box, 2-motor, 21-lower end cover, 22-output shaft, 23-rotor, 221-second matching hole, 3-connecting seat, 301-first through hole, 302-second through hole, 303-third through hole, 31-main body, 3101-peripheral wall, 3102 -Reinforcing rib, 3103-chamber wall, 311-slot, 3111-protrusion, 32-nut, 321-first matching hole, 3211-hole wall, 33-connecting piece, 331-axial hole, 332-embedded portion, 333-extension portion, 36-insulating cover, 361-cover, 3610-flanged edge, 3611-inner cavity, 362-arm, 363-elastic hook, 37-assembly slot, 4-first fastener, 5-second fastener. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0035] It should be noted that when an element is referred to as being "fixed" to another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right", "front", "back" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to belong to the technical field of the present invention. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Example 1.

[0037] Figures 1 to 9 A specific embodiment of the insulation structure and lawn mower of the present invention is shown.

[0038] A specific embodiment of the present invention discloses a lawn mower 1, referring to Figure 1 The mower comprises a housing, a push rod 15 connected to the rear of the housing and extending rearward and upward, running wheels 16 disposed at the bottom of the housing, a grass collection box 17 detachably connected to the rear of the housing, a battery chamber disposed within the housing for accommodating a battery pack 131, and a motor 2 disposed within the housing. The battery pack 131 powers the motor 2. In other embodiments, the mower is equipped with a power cord that connects to the mains power grid, which supplies power to the motor. The motor 2 comprises a rotor 23 and an output shaft 22 that rotates synchronously with the rotor 23. One end of the output shaft 22 is connected to the blade 14. The motor 2 drives the blade 14 to rotate via the output shaft 22, thereby achieving the mowing operation. Typically, the output shaft 22 and blade 14 are made of metal. Specifically, the housing includes a chassis 11 disposed at the bottom. The motor 2 is fixed above the chassis 11 and is approximately perpendicular to the chassis 11. The output shaft 22 extends downward through the chassis 11 and connects to the blade 14. In this embodiment, the lower end cap 21 of the motor 2 is securely connected to the chassis 11. The lower end cap 21 is made of insulating material. The battery cavity is arranged at a front position relative to the motor 2. The housing further comprises a motor cover 12 arranged above the motor and a battery cavity cover 13 arranged above the battery cavity.

[0039] In this embodiment, reference Figures 2 to 9 An insulating structure is provided between the output shaft 22 and the blade 14 to achieve an insulated connection between the blade 14 and the output shaft 22. The insulating structure includes a connecting seat 3. For ease of description, the connecting seat 3 is used as a reference, and the direction of the connecting seat 3 toward the motor 2 and the direction away from the blade 14 (reference Figure 3 The side pointed by the arrow U in the figure is defined as the first side. Figures 1 to 9 In the actual operation of the lawn mower, the first side is the upper side. Figure 3 The side pointed by the arrow D in the figure is defined as the second side. Figures 1 to 9 In the text, and when the lawn mower is actually working, the second side is the lower side. In the following text, unless otherwise specified, all references to "upper surface" refer to the surface facing the first side, "lower surface" refers to the surface facing the second side, "up" in "above", "upward" and "upward" refer to the first side, and "lower" in "below", "downward" and "downward" refer to the second side. An output shaft connection portion is provided on the surface of the connecting seat 3 facing the first side, and the output shaft 22 is fixedly connected to the connecting seat 3 through the output shaft connection portion. At least one blade connection portion is provided on the surface of the connecting seat 3 facing the second side, and the blade 14 is fixedly connected to the connecting seat 3 through the blade connection portion. There is no direct contact between the output shaft connection portion and any of the blade connection portions, and they are separated by insulating material, which ensures additional insulation between the blade and the output shaft. That is to say, when the basic insulation of the motor 2 itself fails, the insulating structure can ensure that the blade is not electrified.

[0040] refer to Figure 2 、 Figures 5 to 7 The connecting seat 3 includes a roughly circular main body 31, which is made of insulating material. The output shaft connecting portion is arranged on the upper surface of the main body 31 and close to its rotation center. The output shaft 22 is fixedly connected to the output shaft connecting portion from above the main body 31 through the second fastener 5, and the rotation center of the output shaft 22 coincides with the rotation center of the main body 31. Specifically, the output shaft connecting portion includes an axial hole 331 extending downward from the upper surface of the main body 31, and the cross-sectional shape and size of the axial hole 331 match the cross-sectional shape and size of the output shaft 22. Preferably, an interference fit can be achieved between the axial hole 331 and the output shaft 22. Further, referring to Figure 6 and Figure 8The cross-sectional shape of the shaft hole 331 and the cross-sectional shape of the output shaft 22 are set to be non-rotationally symmetrical, which can limit the shaft hole 331 and the output shaft 22 from relative rotation after assembly. In this embodiment, the opening of the shaft hole 331 faces upward, and the shaft hole 331 extends downward and does not penetrate the upper and lower surfaces of the main body 31. A first through hole 301 is provided at the bottom of the shaft hole 331, and a second matching hole 221 is provided on the lower end face of the output shaft 22, and the first through hole 301 corresponds to the second matching hole 221. The second fastener 5 is a screw made of metal, and the screw includes a screw head and a screw rod, and the diameter of the screw head is larger than the inner diameter of the first through hole 301, and the diameter of the screw rod is not larger than the inner diameter of the first through hole 301. A thread is provided on the screw rod, and a thread matching the screw is provided in the second matching hole 221. When the output shaft 22 and the main body 31 are fixedly connected, the screw rod passes through the first through hole 301 from the bottom of the main body 31 and engages with the thread in the second matching hole 221. The screw head is pressed against the lower surface of the main body 31 to achieve a fixed connection between the output shaft 22 and the main body 31.

[0041] In this embodiment, preferably, reference Figure 2 、 Figures 5 to 7 In order to enhance the connection strength between the output shaft connection part and the output shaft 22, the output shaft connection part is constructed to include a first cavity extending downward from the upper surface of the main body 31, and a connector 33 fixedly embedded in the first cavity. The connector 33 is made of metal material formed by powder metallurgy and is fixedly embedded in the first cavity of the main body 31. The connector 33 includes an embedded portion 332 at the lower part and an extension portion 333 extending upward from the embedded portion 332, wherein the outer diameter of the embedded portion 332 is larger than the outer diameter of the extension portion 333. The connector 33 includes an axial hole 331 extending downward from its upper surface (i.e., the upper surface of the embedded portion 332). The axial hole 331 passes through or does not pass through the upper and lower surfaces of the connector 33. When the axial hole 331 does not pass through, a through hole for the screw rod to pass through is provided on the bottom surface of the axial hole 331. Accordingly, the main body 31 includes a first cavity extending downward from its upper surface. This first cavity has an opening relatively close to the upper surface of the main body 31 and a cavity relatively close to the lower surface of the main body 31. The inner diameter of the opening matches the outer diameter of the extension 333, and the inner diameter of the cavity matches the outer diameter of the embedded portion 332. The outer periphery of the cavity is provided with a cavity wall 3103 of a certain thickness. A first through-hole 301 is provided on the bottom surface of the cavity. In this embodiment, the connector 33 is integrally injection-molded with the main body 31. Ribs and / or grooves (not shown) running radially along the first cavity are provided within the cavity. Correspondingly, grooves / ribs (not shown) are provided on the connector 33 to mate with the ribs and / or grooves within the first cavity, ensuring that relative movement between the connector 33 and the main body 31 in both radial and axial directions is prevented. Of course, in other embodiments, the connector 33 may also be made of a high-strength non-metallic material or other material that satisfies the required connection strength.

[0042] The blade connection portion is provided on the lower surface of the main body portion 31 and near its edge, and the blade 14 is fixedly connected to the blade connection portion from the bottom of the main body portion 31 through the first fastener 4. Specifically, the blade connection portion includes a plurality of first matching holes 321 extending upward from the lower surface of the main body portion 31. Among the plurality of first matching holes 321, there are at least two first matching holes 321, and the lines connecting the centers of the two first matching holes 321 and the rotation center of the main body portion 31 are not in the same straight line. Such a setting limits the user to installing the blade 14 so that the blade 14 can only be installed with the side facing upward. When the blade 14 is reversed, it cannot be installed. In this embodiment, two first matching holes 321 are provided, which are asymmetrically located on both sides of the rotation center of the main body portion 31. Accordingly, a second through hole 302 corresponding to the position of the first matching hole 231 is provided on the blade 14. The first fastener 4 is a metal bolt comprising a bolt head and a bolt shank. The bolt head has a diameter greater than the diameter of the second through hole 302, while the bolt shank has a diameter no greater than the diameter of the second through hole 302. The bolt shank is provided with threads, and the first mating hole 231 is provided with threads matching the bolt. When the blade 14 is fixedly connected to the main body 31, the bolt shank passes upward through the second through hole 302 from below the blade 14 and engages with the threads in the first mating hole 231. The bolt head abuts against the lower surface of the blade 14, thereby achieving a fixed connection between the blade 14 and the main body 31. In this embodiment, the blade 14 also includes a third through hole 303, which is located near the rotation center of the blade 14 and corresponds to the first through hole 301, for the second fastener 5 to pass through. In other embodiments, the second fastener 5 is located completely above the blade 14, in which case the blade 14 does not need to have a third through hole 303.

[0043] In this embodiment, preferably, reference Figure 2 、 Figure 6, the first matching hole 321 passes through the upper and lower surfaces of the main body 31. The outer periphery of the first matching hole 321 is provided with a hole wall 3211 with a certain thickness, and the hole wall 3211 protrudes upward from the upper surface of the main body 31. The outer periphery of the main body 31 is provided with a peripheral wall 3101 with a certain thickness, and the peripheral wall 3101 is roughly circular. The side of the hole wall 3211 away from the rotation center of the main body 31 coincides with the peripheral wall 3101, and the side of the hole wall 3211 close to the rotation center of the main body 31 coincides with the chamber wall 3103. A reinforcing rib 3102 extending along the circumference of the main body 31 is provided between the peripheral wall 3101 and the chamber wall 3103. Specifically, the N first matching holes 321 divide the reinforcing rib 3102 into N sections, where N is a positive integer not less than 1, and the extension line of any section of the reinforcing rib 3102 to both ends passes through the first matching hole 321 adjacent to it. Furthermore, the extension lines of any section of the reinforcing rib 3102 at both ends pass through the geometric center of the first mating hole 321. The provision of the reinforcing rib 3102 on the connecting base 3 allows the load borne by the blade 14 during operation of the mower to be transmitted through the first fastener 4, the peripheral wall 3101, and the reinforcing rib 3102 to the hole wall 3211 of the first mating hole 321. The load is then transmitted via the hole wall 3211 to the chamber wall 3103, the connecting member 33, and the output shaft 22 of the motor. This effectively strengthens the circumferential strength of the connecting base 3 and prevents the connecting member 3 from breaking when the mower's blade 14 is subjected to heavy loads.

[0044] In this embodiment, preferably, reference Figure 2 、 Figures 5 to 7 To enhance the connection strength between the blade connection portion and the blade 14, the blade connection portion includes a first mating hole 321 extending upward from the lower surface of the main body 31, a second cavity disposed within the first mating hole 321, and a metal nut 32 fixedly embedded within the second cavity. The nut 32 has threads that engage with the first fastener 4. The first mating hole 321 may or may not pass through the upper and lower surfaces of the main body 31. The nut 32 is integrally injection molded with the main body 31.

[0045] In the technical solution of the above-mentioned embodiment, the output shaft connection part is arranged roughly along the rotation center of the main body 31, and the blade connection part is arranged on both sides of the rotation center of the main body 31, so that the output shaft connection part and any blade connection part are isolated by insulating material, and the output shaft 22 is matched with the main body 31 from the top, and the blade 14 is matched with the main body 31 from the bottom, realizing the insulating matching between the blade and the output shaft.

[0046] In the technical solution of the above embodiment, the metal blade 14 is exposed below the main body 31, and the screw head of the metal second fastener 5 is also exposed below the main body 31, so there is a risk of electrical conduction between the blade 14 and the second fastener 5. Figures 2 to 7 、 Figure 9 The insulating structure further includes an insulating cover 36 made of an insulating material, which provides insulation between the blade 14 and the second fastener 5. Specifically, the insulating cover 36 includes a cover portion 361 having a bottom-closed inner cavity 3611. The outer diameter of the cover portion 361 is adapted to the inner diameter of the third through hole 303. Typically, the outer diameter of the cover portion 361 is equal to or slightly smaller than the inner diameter of the third through hole 303, so that the cover portion 361 can pass through the third through hole 303. The inner diameter of the cover portion 361 (i.e., the diameter of the inner cavity 3611) is adapted to the outer diameter of the screw head of the second fastener 5. Typically, the inner diameter of the cover portion 361 is larger than the outer diameter of the screw head of the second fastener 5, so that the screw head can be accommodated in the inner cavity 3611. Figure 2 and Figure 9 The open end of the cover portion 361 has a flange 3610 extending outward, and the flange 3610 is sandwiched between the upper surface of the blade 14 and the lower surface of the main body 31.

[0047] The insulation cover 36 and the second fastener 5 are independently provided and removably connected to the main body 31. The insulation cover 36 also includes at least one first mounting portion. Accordingly, the main body 31 includes at least one second mounting portion that mates with the first mounting portion. In this embodiment, the first mounting portion includes arms 362 extending symmetrically outward along flanges 3610, and elastic hooks 363 extending upward from the outer ends of the arms 362. The second mounting portion includes a concave mounting groove 37 provided on the lower surface of the main body 31. The shape of the mounting groove 37 matches the shape of the open end of the insulation cover 36. In particular, the flanges 3610 are sandwiched between the upper surface of the blade 14 and the mounting groove 37. The mounting groove 37 also includes slots 311 corresponding in number and position to the elastic hooks 363. The slots 311 are provided with protrusions 3111, which engage with the elastic hooks 363. The elastic deformation of the elastic hooks 363 allows the insulation cover 36 to be connected to the main body 31. In this embodiment, the connection line between the two slots 311 and the connection line between the two first matching holes 321 are approximately perpendicular to each other. In other embodiments, the number of the first mounting portion and the second mounting portion is not limited to two and can be adjusted according to actual needs. In other embodiments, the assembly form of the first mounting portion and the second mounting portion is not limited to the structure of using a hook and a slot, and other detachable structures such as a threaded matching structure can also be adopted according to actual needs. Specifically, for example, matching threads can be provided on the inner wall of the inner cavity 3611 and the outer periphery of the screw head of the second fastener, as long as the detachable connection between the insulating cover 36 and the main body 31, as well as the insulating isolation blade 14 and the second fastener 5 are simultaneously met.

[0048] When installing the lawn mower, insert the output shaft 22 into the shaft hole 311 of the connecting base 3. Insert the screw rod of the second fastener 5 from the bottom of the connecting base 3 upward through the first through-hole 301, insert it into the second mating hole, and tighten it, securing the output shaft 22 to the connecting base 3. Align the first mounting portion of the insulating cover 36 with the second mounting portion of the main body 31, so that the cover portion 361 of the insulating cover 36 covers the screw head of the second fastener 5. Align the second through-hole 302 with the first mating hole 321, and pass the cover portion 361 of the insulating cover 36 through the third through-hole 303. Then, use the first fastener 4 to securely connect the blade 14 to the connecting base 3, completing the installation of the lawn mower. At this point, the blade 14 is insulated and isolated from the second fastener 5 by the insulating cover 36. This not only ensures effective insulation between the blade 14 and the output shaft 22, but also allows the use of universal screws, improving component versatility and reducing costs. Furthermore, the insulating cover 36 is an injection molded part, which simplifies the production process, is low-cost, and is easy to install and replace.

[0049] In this embodiment, preferably, the rotation center of the output shaft 22, the rotation center of the main body 31, the rotation center of the shaft hole 331, the rotation center of the second fastener 5, the rotation center of the screw hole 221, the rotation center of the first through hole 301, and the rotation center of the third through hole 303 coincide.

[0050] Example 2.

[0051] This embodiment is substantially the same as embodiment 1. For the sake of brevity, only the differences from embodiment 1 are described in this embodiment.

[0052] The insulating cover 36 is integrally provided with the second fastener 5. Specifically, the insulating cover 36 is integrally injection molded to cover the screw head of the second fastener 5. Compared with the first embodiment, the first mounting portion and the second mounting portion can be eliminated in this embodiment.

[0053] Furthermore, the second fastener 5 is a screw with a non-standard screw head, and accordingly, the cover portion of the insulating cover 36 has a non-standard cross-sectional shape. This means that the second fastener 5 cannot be installed or removed using common tools (such as ordinary wrenches and screwdrivers), and must be installed or removed using tools of a specific shape.

[0054] The technical features of the above embodiments can be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction between the combinations of these technical features, they should be considered to be within the scope of this specification.

[0055] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0056] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An insulating structure for an electric garden tool, the electric garden tool comprising: case; A motor (2) is provided in the housing for providing power; the motor (2) includes an output shaft (22); a blade (14) is connected to the output shaft (22), and the motor (2) drives the blade (14) to rotate through the output shaft (22); the insulating structure is provided between the output shaft (22) and the blade (14) to achieve an insulated connection between the blade and the output shaft; wherein the insulating structure includes a connecting seat (3), the connecting seat (3) includes a main body (31) made of insulating material, the main body (31) is provided with an output shaft connecting portion fastened to the output shaft (22), and at least two blade connecting portions fastened to the blade (14); the output shaft connecting portion and any one of the blade connecting portions are insulated and isolated from each other; The output shaft (22) is fixedly connected to the output shaft connection portion via a second fastener (5); the blade (14) is fixedly connected to the blade connection portion via at least two first fasteners (4); The insulating structure further comprises an insulating cover (36) made of insulating material, wherein the insulating cover (36) is arranged between the second fastener (5) and the blade (14); The output shaft (22) is coupled to the output shaft connecting portion from the first side of the connecting seat (3); the second fastener (5) passes through the connecting seat (3) from the second side of the connecting seat (3) toward the first side and is coupled to the output shaft (22); the insulating cover (36) forms an inner cavity (3611); the portion of the second fastener (5) protruding from the surface of the main body (31) facing the second side toward the second side is accommodated in the inner cavity (3611), and the blade (14) is isolated outside the inner cavity (3611); The insulating cover (36) comprises a cover portion (361) having a bottom portion for sealing the inner cavity (3611); an open end of the cover portion (361) has a flange (3610) extending outward, and the flange (3610) is clamped between the upper surface of the blade (14) and the lower surface of the main body (31); The insulating cover (36) further includes at least one first mounting portion, the main body (31) includes at least one second mounting portion adapted to the first mounting portion, the first mounting portion includes an arm (362) symmetrically extending outward along the flange (3610), and an elastic hook (363) extending upward from the outer end of the arm (362), the main body (31) includes at least one slot (311), and the elastic hook (363) is detachably connected to the slot (311).

2. The insulation structure according to claim 1, wherein: The insulating cover (36) has a non-standard end surface.

3. A lawn mower, characterized in that: The insulating structure comprises the insulating structure as described in any one of claims 1 to 2.

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