Garden tools

Abstract

The present invention provides a garden tool, comprising a body; a functional component for realizing the functions of the garden tool; a power component for providing power to the functional component; and a traveling wheel for supporting the body and driving the body to move. Wherein, a hub motor is arranged inside the traveling wheel, and a fixing component for fixing the hub motor is arranged on the body. The fixing component includes a fixing plate, a first fixing member and a second fixing member located on the fixing plate. The output shaft of the hub motor is received in the first fixing member, and the power cord in the output shaft passes through the second fixing member after passing out of the first fixing member and then enters the interior of the body. Compared with the prior art, the garden tool of the present invention not only does not need to use a speed reduction structure, improving the transmission efficiency, but also simplifies the wiring method of the hub motor, making the assembly simpler and more convenient.

Description

Technical Field

[0001] The invention relates to a garden tool, in particular to a lawn mower using a hub motor. Background Art

[0002] With the rapid development of the economy, the application of push lawn mowers in the garden tool industry is becoming more and more extensive. The use of push lawn mowers has brought a lot of convenience to people's lives and greatly improved people's work efficiency in mowing the lawn. In order to reduce the physical exertion of the operator, the push lawn mower is provided with a self-propelled drive motor. The motor is generally arranged on the wheel axle of the walking wheel of the push lawn mower and drives the wheel axle to rotate through a reduction structure, thereby driving the walking wheel to rotate, so as to achieve the purpose of the push lawn mower to move itself.

[0003] However, this design places high demands on the deceleration structure, and due to its large size, the assembly of the power line and the control line of the deceleration structure is complicated and maintenance is inconvenient.

[0004] In view of this, it is necessary to improve the existing lawn mower to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a gardening tool, which not only applies a wheel hub motor, but also designs the wiring mode of the wheel hub motor, so that the assembly is simpler and more convenient.

[0006] To achieve the above-mentioned purpose, the present invention provides a garden tool, comprising: a body; a functional component for realizing the function of the garden tool; a power component for providing power for the functional component; a walking wheel for supporting the body and driving the body to move; wherein a hub motor is arranged in the walking wheel, a fixing component for fixing the hub motor is arranged on the body, the fixing component comprises a fixing plate and a first fixing member and a second fixing member located on the fixing plate, the output shaft of the hub motor is accommodated in the first fixing member, and the power cord in the output shaft passes through the first fixing member and then passes through the second fixing member until it enters the interior of the body.

[0007] As a further improvement of the present invention, the first fixing member and the second fixing member are located on the same side of the fixing plate.

[0008] As a further improvement of the present invention, the output shaft and the first fixing member are both hollow structures, a slot is provided on the side wall of the output shaft, and a through slot is provided on the side wall of the first fixing member, the slot corresponds to the through slot, so that the power cord in the output shaft can pass through the slot and the through slot to exit the first fixing member.

[0009] As a further improvement of the present invention, the through groove is arranged in a U shape.

[0010] As a further improvement of the present invention, the second fixing member is also of a hollow structure, and the power cord passes through the through groove and then enters and passes through the second fixing member until it reaches the bottom of the machine body.

[0011] As a further improvement of the present invention, an opening is provided at the bottom of the machine body, and the power cord enters the interior of the machine body through the opening.

[0012] As a further improvement of the present invention, the first fixing member and the fixing plate are integrally provided, and the second fixing member fixes the fixing plate to the machine body.

[0013] As a further improvement of the present invention, the second fixing member includes a fixing portion that passes through both the fixing plate and the machine body and a locking portion that extends outward from the fixing portion. A locking hole is provided on the locking portion, and a fixing hole is correspondingly provided on the fixing plate for a bolt to pass through the locking hole and the fixing hole to lock and fix the second fixing member on the fixing plate.

[0014] As a further improvement of the present invention, the fixing assembly further includes a protective tube sleeved outside the power cord. One end of the protective tube is connected to the first fixing member, and the other end passes through the second fixing member and then enters the interior of the machine body and is fixedly connected to the machine body.

[0015] As a further improvement of the present invention, the protective tube is a corrugated tube.

[0016] The beneficial effects of the present invention are as follows: By providing the first fixing member and the second fixing member on the fixing plate, when the output shaft of the hub motor is received in the first fixing member, the power cord in the output shaft can pass through the first fixing member and then through the second fixing member until it enters the interior of the machine body. Compared with the prior art, the gardening tool of the present invention not only does not require a speed reduction structure, improving the transmission efficiency, but also simplifies the wiring method of the hub motor, making the assembly simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of a lawn mower according to a preferred embodiment of the present invention.

[0018] Figure 2 is Figure 1 another perspective view of the lawn mower shown.

[0019] Figure 3 is Figure 1 a schematic structural view of the rear wheel and the hub motor in

[0020] Figure 4 is Figure 3 the exploded view of

[0021] Figure 5 is Figure 4 Combined structural diagram of the first rear wheel and the fixing component in

[0022] Figure 6 is Figure 5 Exploded view of

[0023] Figure 7 is Figure 6 Another perspective schematic diagram of

[0024] Figure 8 is Figure 6 Schematic diagram of the structure of the fixing component in

[0025] Figure 9 is Figure 8 Another perspective schematic diagram of

[0026] Figure 10 is Figure 4 Stereogram after the height adjustment structure is combined in

[0027] Figure 11 is Figure 10 Exploded view of

[0028] Figure 12 is Figure 2 Partial enlarged view at the second rear wheel in

[0029] Figure 13 is in Figure 12 Cross-sectional view after adding a protective tube in Detailed implementation manner

[0030] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] As Figure 1 and Figure 2 shown, the present invention discloses a gardening tool 100, including a body 10, a traveling wheel 20 for supporting the body 10 and capable of driving the body 10 to move, and a handrail bracket 30 connected to the body 10 for a user to push. In this embodiment, the gardening tool 100 is a lawn mower, which is provided with two blades (i.e., functional components) 11. The two blades 11 are arranged at the middle position at the bottom of the body 10 and are staggered front and back. Each of the two blades 11 is individually driven by a motor (i.e., power component) 12 to achieve mowing, and the motor 12 is a waterproof motor. A grass collection bag 13 is provided at the rear of the lawn mower 100, so that the lawn mower 100 has a grass collection function. Of course, the gardening tool 100 may also be a single-blade lawn mower or other types of gardening tools, which are not limited herein.

[0032] The armrest bracket 30 extends obliquely upward from the rear of the machine body 10, and a control component (not shown) is provided on the armrest bracket 30. This control component is used to control the self-propulsion and cutting of the lawn mower 100. That is to say, on the one hand, the control component is used to control the rotation speed of the two blades 11 to ensure the cutting effect; on the other hand, it is used to control the traveling speed and traveling direction of the traveling wheels 20 to ensure that the entire lawn mower 100 can travel and work normally.

[0033] As Figures 3 to 13 and in combination with Figure 1 shown, the traveling wheels 20 include a pair of front wheels 21 located on the front side of the machine body 10 and a pair of rear wheels 22 located on the rear side of the machine body 10. The size of each rear wheel 22 is larger than the size of each front wheel 21. The rear wheels 22 are drive wheels, and a hub motor 40 is provided inside each rear wheel 22. The hub motor 40 is an outer rotor motor. The output shaft 41 of the hub motor 40 is connected to the rear wheel 22 so that the hub motor 40 and the rear wheel 22 rotate coaxially. Thus, when the hub motor 40 is started, it can drive the rear wheel 22 to rotate, and then drive the machine body 10 to move forward or backward. Of course, in other embodiments of the present invention, a hub motor 40 can also be provided inside the front wheels 21. Generally, there are the following three ways to set the hub motor 40: ① Set the hub motor 40 inside the two rear wheels 22; ② Set the hub motor 40 inside the two front wheels 21; ③ Set the hub motor 40 inside both the two front wheels 21 and the two rear wheels 22 at the same time.

[0034] In existing lawn mowers, an inner rotor motor is mostly used as the self-propulsion drive motor. The inner rotor motor has a low cost and a small volume, but the inner rotor motor has a high speed and a small torque. When used as the self-propulsion drive motor of a lawn mower, a speed reducer must be used to reduce the output speed and increase the torque. If a speed reducer is not used, the self-propulsion speed of the lawn mower is too fast. On the one hand, it makes the lawn mower easy to hit an obstacle because of insufficient braking. On the other hand, when the lawn mower is self-propelling, the lawn mower blades are working at the same time. If the self-propulsion speed is too fast, the mowing effect will be unsatisfactory, and the lawn will be cut densely and sparsely, and the lawn will not look good. Therefore, in this embodiment, after the hub motor 40 is designed as an outer rotor motor, because its speed is lower and its torque is larger, there is no need to set a speed reduction device, and the hub motor 40 is directly used to drive the rear wheel 22 to rotate, so that the walking and the adjustment of the walking speed of the lawn mower 100 can be realized. Compared with the prior art, not only the volume occupied by the speed reduction device is saved, making the structure of the lawn mower 100 more compact and space-saving, but also the energy loss caused by multi-stage transmission is avoided.

[0035] Preferably, the hub motor 40 is coaxial with the rear wheel 22, and the rear wheel 22 is mounted on the outer rotor of the hub motor 40. The angular velocity of the hub motor 40 is the same as that of the rear wheel 22. When the outer diameter of the rear wheel 22 is 4 to 15 inches, the rotational speed of the hub motor 40 is less than or equal to 563 r / min. Preferably, when the outer diameter of the rear wheel 22 is 4 to 15 inches, the rotational speed of the hub motor 40 is 100 to 200 r / min. In an embodiment of the present application, the rotational speed of the hub motor 40 is 120 r / min. It can be understood that although the rotational speed of the hub motor 40 can be set very high, when the rotational speed of the hub motor 40 is too high, the operator will not be able to keep up with the forward speed of the lawn mower 100. A large number of experiments have shown that when the outer diameter of the rear wheel 22 is 4 to 15 inches (inch), the maximum rotational speed of the hub motor 40 does not exceed 563 r / min.

[0036] In summary, when the hub motor 40 is used for the lawn mower 100, especially on the drive wheel of a walking lawn mower, various factors need to be considered. A special parameter outer rotor hub motor 40 must be designed for the walking lawn mower. In an embodiment of the present application, the hub motor 40 is selected with a rotational speed in the range of 100 to 200 r / min, and at the same time, the rated power of the hub motor 40 is 50 to 120 W, so that the walking speed meets the cutting requirements of the lawn mower 100, and the rated power of the hub motor 40 is limited to 50 to 120 W to avoid excessive power consumption and affect the normal working duration of the lawn mower 100. To avoid the hub motor 40 being too large or too small and affecting the self-propelled performance, the diameter of the drive wheel of the lawn mower 100 is set at 4 to 15 inches (inch).

[0037] Furthermore, the hub motor 40 is of a disc structure. Since the outer diameter of the rear wheel 22 is larger than the diameter of the motor usually installed on the rear wheel axle, the thickness of the rear wheel 22 can be designed to be thinner, thereby reducing the length of the hub motor 40 in the lateral direction and avoiding the rear wheel 22 from exceeding the cutting chamber. In the present application, since the hub motor 40 is a direct drive structure, the transmission efficiency is particularly high.

[0038] The hub motor 40 is completely housed inside the rear wheel 22, which can reduce the volume occupation. The rear wheel 22 further includes a tire 221 disposed outside the hub motor 40. An air inlet 222 is provided on the tire 221 to inflate the tire 221 by means of an inflation device to achieve the effect of buffering and shock absorption. Preferably, the tire 221 is a tubeless tire, but it should not be limited thereto. In other embodiments, the tire 221 may also be a non-pneumatic tire with a cavity structure.

[0039] The hub motor 40 includes a stator, a rotor, a motor end cover and a control board, and the control board is used to control the rotation speed and rotation direction of the hub motor 40. The rear wheels 22 include a first rear wheel 223 and a second rear wheel 224 respectively arranged on both sides of the machine body 10, and the distance between the first rear wheel 223 and the second rear wheel 224 is less than the width of the machine body 10 in the left-right direction, so as to avoid the influence of too large distance between the two rear wheels on the cutting range of the lawn mower 100.

[0040] Preferably, a first hub motor 401 is arranged in the first rear wheel 223, and a second hub motor 402 is arranged in the second rear wheel 224. When the rotation speed of the first hub motor 401 is different from that of the second hub motor 402, the rotation speeds of the first rear wheel 223 and the second rear wheel 224 are different, and at this time, the lawn mower 100 can be steered (turn left or right); when the rotation direction of the first hub motor 401 is different from that of the second hub motor 402, the rotation directions of the first rear wheel 223 and the second rear wheel 224 are different, and at this time, the lawn mower 100 can achieve zero turn, that is, turn in place. Of course, in other embodiments, the hub motor 40 may also be arranged only in the first rear wheel 223 or the second rear wheel 224, as long as the synchronous rotation of the two rear wheels 22 can be achieved, and no limitation is made here.

[0041] In an embodiment of the present application, the rotation speed of the hub motor 40 is at least partially associated with the rotation speed of the blade 11. When the traveling speed of the lawn mower 100 becomes faster, that is, when the rotation speed of the hub motor 40 is high, the rotation speed of the blade 11 also needs to be increased to avoid uneven mowing. When the traveling speed of the lawn mower 100 becomes slower, the rotation speed of the blade 11 also needs to be decreased. That is to say, in different cutting modes of the lawn mower 100, the rotation speeds of the blade 11 are different, and the rotation speeds of the hub motor 40 also correspond differently to match the cutting mode.

[0042] In an embodiment of the present application, a detection device (not shown) is provided on the lawn mower 100, which can detect the rotational speeds of the two hub motors 40. When the detection device detects that the rotational speeds of the two hub motors 40 are different, it means that the lawn mower 100 is in the process of turning. The detection device sends a signal to the control board of the hub motor 40, and the control board controls the hub motor 40 to run at a low speed to avoid danger caused by too high a speed during turning. In the low-speed operation mode, the rotational speed of the hub motor 40 is lower than 100 r / min. To ensure that turning is not affected, the rotational speeds of the two hub motors 40 are reduced proportionally. For example, when the lawn mower 100 turns to the left, the rotational speed of the left hub motor 40 is 100 r / min, and the rotational speed of the right hub motor 40 is 150 r / min. The rotational speeds of the left and right hub motors 40 are reduced proportionally by 50%. At this time, the rotational speed of the left hub motor 40 is 50 r / min, and the rotational speed of the right hub motor 40 is 75 r / min, which will not affect the turning process of the lawn mower 100. Of course, the reduction ratio can also be other ratios, not limited to the values in this embodiment.

[0043] A fixing assembly 50 for fixing the hub motor 40 is provided on the body 10. The fixing assembly 50 includes a fixing plate 51, a fixing seat 52 assembled and fixed to the fixing plate 51, and a first fixing member 53 and a second fixing member 54 located on the fixing plate 51. The first fixing member 53 and the fixing seat 52 cooperate to fix the rear wheel 22 to the fixing plate 51. A through hole 511 for the output shaft 41 of the hub motor 40 to pass through is formed on the fixing plate 51, and a receiving hole 521 for receiving the output shaft 41 of the hub motor 40 is correspondingly formed on the fixing seat 52. Thus, the output shaft 41 can be limited and received in the receiving hole 521 after passing through the through hole 511, so as to realize the fixed connection of the hub motor 40 and the rear wheel 22 with the fixing plate 51. Figure 3 And Figure 4 As shown, the height adjustment bracket 61 is fixedly locked to the housing of the body 10 by bolts. One end of the second fixing member 54 passes through the height adjustment bracket 61 and is snap-fixed to the height adjustment bracket 61, and the other end is locked and fixed to the fixing plate 51. In this way, the fixing plate 51 can be connected to the body 10 of the lawn mower 100 by using the second fixing member 54, which not only realizes the relative fixation between the hub motor 40 and the rear wheel 22 and the body 10, but also provides a basis for the height adjustment of the lawn mower 100.

[0044] The end of the output shaft 41 is a milled flat structure, and the cross-section of the perforation 511 matches the cross-section of the end of the output shaft 41, so as to ensure that the output shaft 41 can pass through the perforation 511. Specifically, the output shaft 41 is integrally arranged in a cylindrical shape. From the perspective of the normal use of the output shaft 41, one side of the output shaft 41 is a flat key structure 411 (i.e., one outer wall surface is a plane), and a notch 412 is formed on the other side, and the flat key structure 411 and the notch 412 are arranged oppositely. The setting of the flat key structure 411, on the one hand, makes the cross-section of the end of the output shaft 41 in a D shape, and the cross-section of the perforation 511 also corresponds to a D shape, so as to ensure that the output shaft 41 can smoothly pass through the perforation 511 and prevent the output shaft 41 from rotating; on the other hand, it is also convenient to open a slot 410 on the flat key structure 411 so that the power cord inside the hub motor 40 can pass through the slot 410 of the output shaft 41.

[0045] The receiving hole 521 is arranged in a U shape, and the notch 412 is recessed inward from the outer wall surface on the other side of the output shaft 41. The setting of the notch 412 can make the inner side wall of the receiving hole 521 just snap-fitted and fixed with the notch 412 when the output shaft 41 is received in the receiving hole 521, so as to limit the output shaft 41 and prevent the output shaft 41 from being pulled out of the fixing seat 52. That is to say, by using the mutual cooperation of the flat key structure 411 and the perforation 511, the rotation of the output shaft 41 can be prevented; and by using the mutual cooperation of the notch 412 and the receiving hole 521, the left and right sliding of the output shaft 41 can be prevented.

[0046] In this embodiment, the receiving hole 521 is recessed downward from the top of the fixing seat 52, so that the end of the output shaft 41 can be fixed from bottom to top by the fixing seat 52, and the end of the output shaft 41 is fixed in the receiving hole 521. That is to say, the width of the receiving hole 521 is smaller than the diameter of the output shaft 41. To limit the output shaft 41 by using the receiving hole 521, the best way is to limit the output shaft 41 in the receiving hole 521 and make the notch 412 just correspond to the inner side wall of the receiving hole 521. At this time, the notch 412 and the receiving hole 521 can be used to fix and limit the output shaft 41, ensuring the stability of the output shaft 41.

[0047] A first mounting hole 522 through which a bolt 55 passes is further formed in the fixed seat 52, and a second mounting hole 512 is correspondingly formed in the fixed plate 51. Thus, the fixed seat 52 and the fixed plate 51 can be fixed by passing the bolt 55 through the first mounting hole 522 and the second mounting hole 512, so that the hub motor 40 can be fixed. The operation is simple and convenient, and the maintenance is also simpler and more convenient. Preferably, the first mounting hole 522 is located below the receiving hole 521. Of course, in other embodiments, the setting position of the first mounting hole 522 can be determined according to actual situations and is not limited herein. In addition, the fixing manner between the fixed seat 52 and the fixed plate 51 can also be other ways, such as snap fixing, adhesive fixing, etc., and no further examples will be given herein.

[0048] In a preferred embodiment of the present invention, a hub motor 40 is provided in each rear wheel 22. Therefore, two fixed plates 51 and two fixed seats 52 are correspondingly provided to fixedly connect with the hub motors 40 in the two rear wheels 22, so as to fix the hub motors 40 in the two rear wheels 22. The fixing assembly 50 further includes a connecting shaft 514, which is used to connect the two rear wheels 22, and further ensures that the two rear wheels 22 can rotate synchronously relative to the connecting shaft 514 when being adjusted in height. Specifically, two ends of the connecting shaft 514 are respectively connected to the bottoms of the two fixed plates 51. Preferably, the connecting shaft 514 is integrally provided with the two fixed plates 51. Of course, the connecting shaft 514 can also be fixedly locked, snap-fixed or adhesively fixed to the two fixed plates 51, and the specific fixing manner is not limited.

[0049] For the lawn mower 100, it is required to have a height adjustment function, that is, the height of the rear wheels 22 relative to the lawn mower 100 can be changed. Therefore, the power cord and control line of the hub motor 40 need to be designed to ensure that the movement of the rear wheels 22 will not pull the power cord and that the power cord cannot be too long to be hooked by objects on the lawn. To achieve this purpose, the present invention designs the routing manner of the power cord by using a first fixing member 53 and a second fixing member 54.

[0050] Since two fixed plates 51 and two fixed seats 52 are respectively provided, two first fixing members 53 and two second fixing members 54 are also respectively provided to assemble the power cords of the two hub motors 40. The following will describe in detail the specific structures of the first fixing member 53 and the second fixing member 54 and the specific routing manner of the power cord.

[0051] Specifically, the first fixing member 53 is formed on the fixing plate 51 for receiving and fixing the output shaft 41. The output shaft 41 has a hollow structure for the power line (and control line) of the in-wheel motor 40 to pass through. The second fixing member 54 is assembled on the fixing plate 51 for assembling the power line inside the output shaft 41. In this embodiment, the first fixing member 53 and the second fixing member 54 are located on the same side of the fixing plate 51 so as to assemble the power line within the shortest distance. As Figure 12 shown, the assembling method of the power line 7 is as follows: The power line 7 is led out from the in-wheel motor 40 to the hollow output shaft 41. When the output shaft 41 is received in the first fixing member 53, the power line 7 inside the output shaft 41 passes out of the first fixing member 53 and then passes through the second fixing member 54 until it enters the inside of the body 10 for fixing.

[0052] Combined with Figures 6 to 9 shown, the first fixing member 53 has a hollow structure, and the output shaft 41 is received in the first fixing member 53 to ensure that the output shaft 41 can be stably installed on the fixing plate 51, that is, the first fixing member 53 plays a role in auxiliary fixing and limiting. A through groove 532 is formed on the side wall of the first fixing member 53, and this through groove 532 is used for the power line inside the output shaft 41 to pass out. Preferably, the first fixing member 53 and the fixing plate 51 are integrally provided, and the through groove 532 penetrates the side wall of the first fixing member 53 and is recessed downward along the height of the first fixing member 53, so that the through groove 532 is in a U-shaped arrangement, which is convenient for routing when installing the in-wheel motor 40.

[0053] The second fixing member 54 also has a hollow structure, and the power line passes out of the through groove 532 and then enters and passes through the second fixing member 54 until it reaches the bottom of the body 10. The second fixing member 54 includes a fixing portion 541 that passes through both the fixing plate 51 and the height adjustment bracket 61 and a locking portion 542 that extends outward from the fixing portion 541. A locking hole 543 is formed on the locking portion 542, and a fixing hole 513 is correspondingly formed on the fixing plate 51. Thus, a bolt 56 can pass through the locking hole 543 and the fixing hole 513 to lock and fix the second fixing member 54 on the fixing plate 51.

[0054] It should be noted that: 1. The output shaft 41 is fixed relative to the fixing plate 51 and cannot rotate, so the power line can be prevented from being wound. 2. The slot 410 on the side wall of the output shaft 41 corresponds to the through groove 532 after installation. Therefore, the fixing plate 51 does not directly contact the power line, and the fixing plate 51 contacts the output shaft 41, playing a role in protecting the power line.

[0055] Figure 12In this case, an opening 14 is provided at the bottom of the body 10. After passing through the second fixing member 54, the power cord 7 enters the interior of the body 10 through the opening 14 and then is connected to the power supply and control components inside the body 10. It can be seen that this routing method of the power cord 7 is simple and convenient, preventing the power cord 7 from being scratched, with simple assembly and convenient maintenance.

[0056] As Figure 13 shown, in order to ensure the waterproof performance and facilitate installation, the fixing assembly 50 further includes a protective tube 57 sleeved outside the power cord 7. One end of the protective tube 57 is connected to the first fixing member 53, and the other end passes through the second fixing member 54 and enters the interior of the body 10 and is fixedly connected to the body 10. Preferably, the protective tube 57 is a corrugated tube, but it should not be limited thereto.

[0057] As Figure 1 shown in Figure 3 FIG. [X], the rear wheel 22 is installed on the height-adjusting bracket 61 of the lawn mower 100 so that the height of the rear wheel 22 can be adjusted through the height-adjusting structure, facilitating the mowing operation of the two blades 11. Preferably, the fixing plate 51 is pivotally connected to the height-adjusting bracket 61, and the height-adjusting bracket 61 is fixed to the housing of the body 10 by bolts. When the height needs to be adjusted, directly pull the adjusting wrench 62 to drive the fixing plate 51 to rotate.

[0058] Specifically, as Figure 10 shown in Figure 11 FIG. [X], the height-adjusting structure includes the aforementioned fixing plate 51, a gear plate 63 provided on one side of the fixing plate 51 and capable of being fixed to the body 10, and the aforementioned adjusting wrench 62. The adjusting wrench 62 is provided on the other side of the fixing plate 51 and is generally located above the fixing plate 51 for cooperating with the gear plate 63. In the present invention, the second fixing member 54 is the rotation center of the height-adjusting structure, and the height from this rotation center to the bottom of the body 10 is constant. On the one hand, it facilitates the rotation of the fixing plate 51 relative to the body 10, and on the other hand, it facilitates the power cord to directly enter the interior of the body 10 from the second fixing member 54, preventing the power cord from being pulled or wound due to the adjustment of the height of the rear wheel 22.

[0059] A plurality of gear slots 631 with different heights are provided on the gear plate 63. The lower side of the gear plate 63 is arc-shaped, and the gear slots 631 with different heights are distributed at different positions of this arc. The center of the arc coincides with the second fixing member 54, so that the distances from each gear slot 631 to the second fixing member 54 are the same. The adjusting wrench 62 can be operated by the user to cooperate with the gear slots 631 with different heights. A positioning portion 620 is provided at the bottom of the adjusting wrench 62, and this positioning portion 620 passes through the fixing plate 51 and cooperates with the gear slot 631 from bottom to top. In this embodiment, the gear slot 631 is formed by a positioning notch opened at the bottom of the gear plate 63, but it should not be limited thereto.

[0060] The height adjustment structure further includes an elastic member 64 elastically arranged between the adjusting wrench 62 and the fixing plate 51, and a push slider 65 located between the elastic member 64 and the adjusting wrench 62. The fixing plate 51 is provided with a receiving cavity 515 for receiving the push slider 65 and the elastic member 64. In the initial state, the elastic force of the elastic member 64 causes the positioning portion 620 to be kept in the corresponding gear slot 631. After pressing the adjusting wrench 62 downward, the elastic member 64 is compressed until the positioning portion 620 disengages from the current gear slot 631 for gear shifting. That is to say, the adjusting wrench 62 can be operably moved on the fixing plate 51 so that the positioning portion 620 is located in or disengages from the gear slot 631. In this embodiment, the elastic member 64 is a compression spring, one end of which is sleeved on a convex block 510 at the bottom of the receiving cavity 515, and the other end elastically abuts against an installation groove (not shown) at the bottom of the push slider 65; of course, it should not be limited thereto. The push slider 65 is abutted by the bottom of the adjusting wrench 62, so that the push slider 65 can only move at the lower end of the receiving cavity 515 to prevent the push slider 65 from disengaging from the receiving cavity 515.

[0061] The adjusting wrench 62 includes a mating portion 621 extending in the vertical direction and mating with the fixed plate 51, an extension portion 622 extending upward from the mating portion 621, and a handle 623 extending further upward from the extension portion 622. The handle 623 is bent and extended in the horizontal direction perpendicular to the vertical direction to form a shape convenient for the operator to operate. The extension portion 622 is further away from the body 10 in the horizontal direction than the mating portion 621. A long strip-shaped first sliding groove 624 is formed in the mating portion 621, and the adjusting wrench 62 is connected to the fixed plate 51 through the first sliding groove 624 so as to be movable up and down. In this embodiment, two first sliding grooves 624 are provided, and the two first sliding grooves 624 are spaced in the vertical direction, and the positioning portion 620 is arranged between the two first sliding grooves 624. A long strip-shaped second sliding groove 516 is formed in the fixed plate 51, and the positioning portion 620 passes through the second sliding groove 516 and mates with the gear position groove 631. The positioning portion 620 can move up and down in the second sliding groove 516.

[0062] Two protruding portions 517 are further provided on the fixed plate 51, and the two protruding portions 517 are spaced in the vertical direction. In this embodiment, each protruding portion 517 is composed of a convex column and a nut for locking and fixing the convex column. Specifically, after the convex column passes through the corresponding first sliding groove 624, the convex column is fixedly connected to the mating portion 621 by using the nut; of course, when the handle 623 is pressed, the whole protruding portion 517 can move up and down along the first sliding groove 624, and at the same time, the positioning portion 620 can also move up and down along the second sliding groove 516.

[0063] The specific operation method of the height adjustment structure is as follows: First, press down the adjusting wrench 62 to quickly disengage the positioning portion 620 from the current gear position groove 631, and then rotate the adjusting wrench 62 back and forth to rotate the fixed plate 51 together. At the same time, the two rear wheels 22 rotate synchronously. After selecting a suitable working height, release the adjusting wrench 62. Under the restoring force of the compression spring 64, the slider 65 is pushed to quickly fix the positioning portion 620 to the corresponding gear position groove 631. At this time, the height adjustment between the wheel axle of the rear wheel 22 and the ground is realized, which is time-saving and labor-saving.

[0064] In this application, the in-wheel motor 40 is powered by the power supply of the lawn mower 100. By designing the routing of the power cord, it is possible to avoid affecting the power cord when adjusting the height of the rear wheels 22. The reason is that since the fixing plates 51 of the two rear wheels 22 are connected together by a connecting shaft 514, when the height of one of the rear wheels 22 is adjusted, the other rear wheel 22 also rotates accordingly to achieve the adjustment of the mowing height. Since the second fixing member 54 is the rotation center when adjusting the height of the rear wheel 22, the part of the power cord from the through slot 532 to the second fixing member 54 is fixed relative to the fixing plate 51, so it will not affect the power cord when the height is increased; at the same time, the part of the power cord from the second fixing member 54 to the opening 14 is also fixed relative to the body 10, so it will not cause the power cord to be pulled or wound when the height is increased.

[0065] In summary, on the one hand, the lawn mower 100 of the present invention can drive the rear wheels 22 to rotate by using the in-wheel motor 40 arranged in the rear wheels 22 and setting the in-wheel motor 40 as an outer rotor motor, so as to realize the self-propulsion of the lawn mower 100; on the other hand, the in-wheel motor 40 can be used to adjust the self-propulsion speed of the lawn mower 100. Compared with the prior art, the lawn mower 100 of the present invention does not need to be provided with a speed reduction device, which not only saves the volume occupied by the speed reduction device, makes the structure of the lawn mower 100 more compact and space-saving, but also avoids the energy loss caused by multi-stage transmission.

[0066] In addition, by setting the fixing assembly 50 to include a fixing plate 51 and a fixing seat 52 assembled and fixed to the fixing plate 51, the output shaft 41 of the in-wheel motor 40 can pass through the through hole 511 on the fixing plate 51 and the receiving hole 521 on the fixing seat 52, so as to realize the fixed connection between the in-wheel motor 40 and the body 10. Furthermore, when the in-wheel motor 40 is damaged, only the rear wheel 22 needs to be disassembled and replaced with a new one, and the repair of the in-wheel motor 40 can be carried out later without affecting the use.

[0067] Furthermore, by providing a first fixing member 53 and a second fixing member 54 on the fixing plate 51, the power cord in the output shaft 41 can pass through the first fixing member 53 and then through the second fixing member 54 until it enters the interior of the body 10, which simplifies the routing and assembly problem of the in-wheel motor 40, makes the installation of the in-wheel motor 40 simpler and more convenient, and also makes the maintenance more convenient.

[0068] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A gardening tool, characterized in that, Comprising: A body; A handrail bracket, connected to the body for a user to push; A functional component for realizing the functions of a gardening tool; A power component for providing power to the functional component; Travel wheels for supporting the body and capable of driving the body to move; Wherein, a hub motor is arranged inside the travel wheel, and a fixing component for fixing the hub motor is arranged on the body. The fixing component includes a fixing plate and a first fixing member and a second fixing member located on the fixing plate. The output shaft of the hub motor is received in the first fixing member. Both the output shaft and the first fixing member are of a hollow structure. A slot is formed on the side wall of the output shaft, and a through slot is formed on the side wall of the first fixing member. The slot corresponds to the through slot. The power cord inside the output shaft passes through the first fixing member from the slot and the through slot and then passes through the second fixing member until it enters the interior of the body.

2. The gardening tool according to claim 1, wherein: The first fixing member and the second fixing member are located on the same side of the fixing plate.

3. The gardening tool according to claim 1, wherein: The through slot is arranged in a U shape.

4. The gardening tool according to claim 1, characterized in that: The second fixing member is also of a hollow structure. The power cord enters and passes through the second fixing member after passing through the through slot until it reaches the bottom of the body.

5. The gardening tool according to claim 4, wherein: An opening is formed at the bottom of the body, and the power cord enters the interior of the body from the opening.

6. The gardening tool according to claim 1, characterized in that: The first fixing member is integrally provided with the fixing plate, and the second fixing member fixes the fixing plate to the body.

7. The gardening tool according to claim 6, characterized in that: The second fixing member includes a fixing portion that passes through both the fixing plate and the body and a locking portion that extends outward from the fixing portion. A locking hole is formed on the locking portion, and a fixing hole is correspondingly formed on the fixing plate for a bolt to pass through the locking hole and the fixing hole to lock and fix the second fixing member on the fixing plate.

8. The gardening tool according to claim 1, characterized in that: The fixing component further includes a protective tube sleeved outside the power cord. One end of the protective tube is connected to the first fixing member, and the other end passes through the second fixing member and then enters the interior of the body and is fixedly connected to the body.

9. The gardening tool according to claim 8, characterized in that: The protective tube is a corrugated tube.

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