Self-propelled hob grass mower with built-in motor

Abstract

The utility model relates to the technical field of garden equipment, and discloses a self-propelled hob grass mower with a built-in motor, which comprises a casing, a hob assembly, a traveling wheel, a driving motor and a clutch driving assembly, the hobbing cutter assembly comprises a hobbing cutter shaft and a hobbing cutter group; the hobbing cutter shaft is rotationally connected with the machine shell; the walking wheels are located on the two sides of the hob assembly respectively. The driving motor is arranged in the hob assembly; the clutch driving assembly is located between the hob shaft and the corresponding walking wheel and used for controlling rotation of the walking wheel. When the driving motor works, the hob shaft and the walking wheel are controlled to rotate synchronously through the clutch driving assembly. When the driving motor does not work, the walking wheels can freely rotate front and back. According to the grass mower, the hob shaft is matched with the clutch driving assembly, the self-walking and mowing functions of the grass mower are achieved, when the driving motor stops, the grass mower can advance and retreat freely, the overall structure is simplified, the maintenance and production cost is reduced, the automation degree is high, and the labor intensity of operators is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of garden equipment, in particular to a self-propelled rotary mower with a built-in motor. Background Art

[0002] In recent years, the requirements for lawn mowing in family gardens have been increasing, and lightweight rotary mowers have become more and more popular among household users. However, most of the existing lightweight rotary mowers on the market are hand-pushed and non-powered. Although they are inexpensive, they need to be pushed by manpower during operation to drive the rotation of the rotary cutter; or both the rotary cutter and the walking are driven by their respective motors. Although they can realize the functions of self-propulsion and mowing, their structures are relatively complex, and the maintenance and production costs are relatively high. Content of the Utility Model

[0003] The utility model provides a self-propelled rotary mower with a built-in motor. The driving motor of the mower is placed inside the machine shell, and through the rotary cutter shaft and the clutch driving assembly as the power output, it drives the walking wheels to walk and the cutting work of the rolling group, realizing the self-propulsion and mowing functions of the mower; when the driving motor stops, the mower can move forward and backward freely, the overall structure is simplified, the maintenance and production costs are reduced, the degree of automation is high, and the labor intensity of the operator is reduced.

[0004] The above object of the utility model is achieved through the following technical solutions:

[0005] A self-propelled rotary mower with a built-in motor includes: a machine shell; a rotary cutter assembly including a rotary cutter shaft and a rotary cutter group, the rotary cutter shaft is rotatably connected to the machine shell, and the rotary cutter group is fixed on the rotary cutter shaft for cutting work; walking wheels are respectively located on both sides of the rotary cutter assembly, the walking wheels include a wheel shaft, a hub rotatably connected to the wheel shaft, and a tire connected to the outside of the hub, facilitating the forward movement of the mower; a driving motor is built inside the rotary cutter assembly for driving the rotation of the rotary cutter shaft; a clutch driving assembly is located between the rotary cutter shaft and the corresponding walking wheel for controlling the rotation of the walking wheel; when the driving motor works, the rotary cutter shaft and the walking wheel are controlled to rotate synchronously through the clutch driving assembly; when the driving motor does not work, the walking wheel can rotate freely on the wheel shaft.

[0006] In the above self-propelled rotary mower with a built-in motor, the clutch driving assembly includes a driving gear, a height-adjusting rotating plate, an internal gear ring and a centrifugal clutch mechanism; one side of the height-adjusting rotating plate is rotatably connected to the rotary cutter shaft, the other side of the height-adjusting rotating plate is fixedly connected to the wheel shaft, the internal gear ring is fixedly connected to the inner edge of the hub, the driving gear is rotatably connected to the rotary cutter shaft outside the height-adjusting rotating plate, and the driving gear meshes with the internal gear ring; the centrifugal clutch mechanism is arranged between the rotary cutter shaft and the driving gear for controlling the engagement or separation of the rotary cutter shaft and the driving gear.

[0007] The above-mentioned self-propelled rotary mower with a built-in motor, wherein the centrifugal clutch mechanism includes a balance weight, a support frame, centrifugal blocks and a return spring. The rotary cutter shaft sequentially passes through the balance weight and the drive gear. An inwardly recessed groove is provided on the rotary cutter shaft along the axial direction, and the groove extends into the shaft hole of the drive gear. A sliding groove communicating with the groove is provided on the balance weight, and the sliding direction of the sliding groove is coaxial with the sliding direction of the groove. The support frame is fixedly connected to the rotary cutter shaft, and the support frame is fixedly connected to the side of the balance weight opposite to the sliding groove. The centrifugal block is in a T shape and includes a slider adapted to the sliding groove. One end of the slider is fixedly connected with a clamping block adapted to the groove, and the other end of the slider is fixedly connected with a support rod opposite to the support frame. A pair of return springs are connected between the support frame and the support rod, and the two return springs are located on both sides of the balance weight. A clamping groove is provided on the inner side of the drive gear near the centrifugal block, and the clamping groove is adapted to be clamped with the clamping block extending into the shaft hole of the drive gear.

[0008] The above-mentioned self-propelled rotary mower with a built-in motor, wherein the clamping groove includes a guiding section extending along the tangent direction of the shaft hole of the drive gear, a sliding groove section with a radius larger than the radius of the shaft hole of the drive gear, and a clamping section extending towards the center of the drive gear. The depth of the sliding groove section is less than the height of the clamping block.

[0009] The above-mentioned self-propelled rotary mower with a built-in motor, wherein a plurality of the clamping grooves are provided, and the plurality of clamping grooves are sequentially connected and evenly distributed on the outer side of the shaft hole of the drive gear.

[0010] The above-mentioned self-propelled rotary mower with a built-in motor, further comprising a height adjustment mechanism for the rotary cutter group, which includes a support rod, a telescopic limiting rod and an arc-shaped adjustment tooth. The two ends of the support rod are respectively fixedly connected to the corresponding height adjustment rotating plates. Arc-shaped adjustment teeth are respectively provided on both sides of the machine shell. The telescopic limiting rods are arranged on both sides of the support rod and are respectively clamped with the corresponding arc-shaped adjustment teeth. Limiting rod groups clamped with the arc-shaped adjustment teeth are respectively provided on the support rod, and the centers of the arc-shaped adjustment teeth coincide with the center of the rotary cutter shaft.

[0011] The above-mentioned self-propelled rotary mower with a built-in motor, wherein the rotary cutter group includes a support plate and a rotary cutter. The support plates are spaced along the length direction of the rotary cutter shaft, and the support plates are fixedly connected to the rotary cutter shaft. The rotary cutter extends along the length direction of the rotary cutter shaft and is fixedly connected to the outside of the support plate. The rotary cutter is in a long strip shape and extends in a spiral shape.

[0012] The above-mentioned self-propelled rotary mower with a built-in motor, wherein the drive motor is arranged at one end of the rotary cutter shaft. The drive motor includes a housing, a stator coil and a stator support. The two ends of the housing are respectively fixedly connected to the corresponding support plates. The stator support is rotatably connected to the rotary cutter shaft through a bearing, and the stator coil is fixed on the outside of the stator support.

[0013] The above-mentioned self-propelled rotary mower with a built-in motor, wherein the machine housing includes side plates and a cover body. The side plates are arranged at both ends of the rotary cutter shaft and are rotatably connected to the rotary cutter shaft through bearings. The cover body is fixedly connected between the two side plates. The cover body includes a top plate and a baffle. The top plate is horizontally arranged, and the baffle extends downward along the front end of the top plate. The cover body is integrally in an L shape.

[0014] The above-mentioned self-propelled rotary mower with a built-in motor, wherein a shaft rod is fixedly connected between the rear bottoms of the two side plates, and a plurality of auxiliary rollers are rotatably connected to the shaft rod along the length direction.

[0015] In summary, the beneficial technical effects of the present utility model are as follows:

[0016] The present utility model includes a machine housing, a rotary cutter assembly, traveling wheels, a driving motor, and a clutch driving assembly. The rotary cutter assembly includes a rotary cutter shaft and a rotary cutter group. The rotary cutter shaft is rotatably connected to the machine housing, and the rotary cutter group is fixed on the rotary cutter shaft. The traveling wheels are connected to both ends of the rotary cutter shaft. The driving motor is built inside the rotary cutter assembly. The clutch driving assembly is respectively connected to both sides of the rotary cutter shaft and is used to control the rotation or stop of the traveling wheels. By using the rotary cutter shaft and the clutch driving assembly as the power output to drive the traveling wheels and the rolling group for cutting work, the self-propelled and mowing functions of the mower are realized. When the driving motor stops, the mower can freely move forward and backward. The overall structure is simplified, the maintenance and production costs are reduced, the degree of automation is high, and the labor intensity of the operator is reduced. Description of the Drawings

[0017] Figure 1 is the front view structural schematic diagram of the present utility model;

[0018] Figure 2 is the rear view structural schematic diagram of the present utility model;

[0019] Figure 3 is the partial cross-sectional view of the rotary cutter shaft and the driving motor of the present utility model;

[0020] Figure 4 is the structural schematic diagram of the present utility model with the traveling wheels removed;

[0021] Figure 5 is the structural schematic diagram of the balance weight, the centrifugal weight, and the rotary cutter shaft when the driving motor of the present utility model stops working;

[0022] Figure 6 is the exploded structural schematic diagram of the centrifugal clutch mechanism of the present utility model;

[0023] Figure 7 is the structural schematic diagram of the driving gear of the present utility model;

[0024] Figure 8It is a schematic cross-sectional structure diagram of the clutch drive assembly when the driving motor of the present utility model stops working;

[0025] Figure 9 It is a schematic cross-sectional structure diagram of the clutch drive assembly when the driving motor of the present utility model is working;

[0026] Figure 10 It is a schematic structure diagram of the traveling wheel of the present utility model;

[0027] Figure 11 It is a schematic diagram of the height adjustment mechanism of the hob group of the present utility model.

[0028] As shown in the figure, 1. Machine shell; 11. Side plate; 12. Cover body; 121. Top plate; 122. Baffle; 2. Hob assembly; 21. Hob shaft; 211. Embedded groove; 212. Reduced neck part; 22. Hob group; 221. Support plate; 222. Hob; 3. Traveling wheel; 31. Wheel shaft; 32. Hub; 33. Tire; 4. Driving motor; 41. Outer shell; 42. Stator coil; 43. Stator bracket; 5. Clutch drive assembly; 51. Driving gear; 511. Card slot; 5111. Guide section; 5112. Slide groove section; 5113. Buckle section; 52. Height adjustment rotating plate; 53. Inner gear ring; 531. Gear ring cover; 54. Centrifugal clutch mechanism; 541. Support frame; 5411. Slide groove; 5412. Limit projection; 542. Balance weight; 543. Centrifugal block; 5431. Slide block; 5432. Clamping block; 5433. Support rod; 544. Return spring; 6. Hob group height adjustment mechanism; 61. Cross bar; 62. Connecting plate; 63. Telescopic limit rod group; 64. Arc-shaped adjusting tooth; 7. Shaft rod; 71. Auxiliary roller. Detailed implementation mode

[0029] The following will further describe the present utility model in detail Figures 1-11 with reference to the attached

[0030] As Figures 1-4 shown, a self-propelled hob mower with a built-in motor includes: a machine shell 1, a hob assembly 2, a traveling wheel 3, a driving motor 4, and a clutch drive assembly 5; the hob assembly 2 includes a hob shaft 21 and a hob group 22, the hob shaft 21 is rotatably connected to the machine shell 1, and the hob group 22 is fixed on the hob shaft 21 for cutting work, and the driving motor 4 is built inside the hob assembly 2 for driving the hob shaft 21 to rotate; in this embodiment, the hob group 22 is welded to the hob shaft 21; the traveling wheels 3 are respectively located on both sides of the hob assembly 2.

[0031] As Figure 4 、 10As shown in the figure, the walking wheel 3 includes a wheel axle 31, a hub 32 rotatably connected to the wheel axle 31, and a tire 33 connected to the outside of the hub 32. The walking wheel 3 is used for the forward movement of the lawn mower; the clutch drive assembly 5 is located between the hob shaft 21 and the corresponding walking wheel 3 and is used to control the rotation of the walking wheel 3; when the drive motor 4 is working, the hob shaft 21 and the walking wheel 3 are controlled to rotate synchronously through the clutch drive assembly 5; when the drive motor 4 is not working, the walking wheel 3 can rotate freely on the wheel axle 31.

[0032] As Figure 2 shown in the figure, the hob group 22 of this embodiment includes a support plate 221 and a hob 222. The support plates 221 are distributed at intervals along the length direction of the hob shaft 21. The support plates 221 are perpendicular to the hob shaft 21 and are fixedly connected to the hob shaft 21. The hob 222 extends along the length direction of the hob shaft 21 and is fixedly connected to the outside of the support plate 221.

[0033] In one embodiment, the hob 222 is strip-shaped and extends in a spiral shape.

[0034] As Figure 1 、 2 shown in the figure, the machine housing 1 includes side plates 11 and a cover body 12. The side plates 11 are arranged at both ends of the hob shaft 21 and are rotatably connected to the hob shaft 21 through bearings. The cover body 12 is fixedly connected between the two side plates 11. The cover body 12 includes a top plate 121 and a baffle 122. The top plate 121 is horizontally arranged, and the baffle 122 extends downward along the front end of the top plate 121. The cover body 12 is integrally L-shaped.

[0035] As Figure 3 shown in the figure, the drive motor 4 of this embodiment is arranged at one end of the hob shaft 21. The drive motor 4 includes a housing 41, a stator coil 42, and a stator bracket 43. The housing 41 is cylindrical. The two ends of the housing 41 are respectively fixedly connected to the corresponding support plates 221. The stator bracket 43 is rotatably connected to the hob shaft 21 through a bearing. One end of the stator bracket 43 is fixedly connected to the adjacent side plate 11. The stator coil 42 is fixed to the outside of the stator bracket 43.

[0036] When the drive motor 4 works, the stator coil 42 is energized to drive the hob shaft 21 to rotate, thereby driving the hob group 22 on the hob shaft 21 to rotate and realizing the mowing work. The drive motor 4 is arranged inside the machine housing 1, reducing the volume of the lawn mower, simplifying the overall structure, and making it more convenient to use.

[0037] As Figures 4-11As shown in the figure, the clutch drive assembly 5 includes a drive gear 51, a height-adjusting rotating plate 52, an internal gear ring 53, and a centrifugal clutch mechanism 54; one side of the height-adjusting rotating plate 52 is rotatably connected to the hob shaft 21, the other side of the height-adjusting rotating plate 52 is fixedly connected to the wheel shaft 31, the internal gear ring 53 is fixedly connected to the inner edge of the hub 32, the drive gear 51 is rotatably connected to the hob shaft 21 on the outside of the height-adjusting rotating plate 52, and the drive gear 51 meshes with the internal gear ring 53; the centrifugal clutch mechanism 54 is arranged between the hob shaft 21 and the drive gear 51 and is used to control the engagement or separation of the hob shaft 21 and the drive gear 51.

[0038] As Figures 5-9 shown, the centrifugal clutch mechanism 54 includes a support frame 541, a balance weight 542, a centrifugal block 543, and a return spring 544. The hob shaft 21 sequentially passes through the support frame 541 and the drive gear 51. An inwardly recessed groove 211 is provided on the hob shaft 21 along the axial direction, and the groove 211 extends into the shaft hole of the drive gear 51. A sliding groove 5411 communicating with the groove 211 is provided on the support frame 541, and the sliding direction of the sliding groove 5411 is coaxially arranged with the sliding direction of the groove 211. The support frame 541 is fixedly connected to the hob shaft 21 by screws. The balance weight 542 is fixedly connected to the side of the support frame 541 opposite to the sliding groove 5411. The centrifugal block 543 is T-shaped. The centrifugal block 543 includes a slider 5431 adapted to the sliding groove 5411. One end of the slider 5431 is fixedly connected with a clamping block 5432 adapted to the groove 211, and the other end of the slider 5431 is fixedly connected with a support rod 5433 opposite to the balance weight 542. A pair of return springs 544 are connected between the balance weight 542 and the support rod 5433, and the two return springs 544 are located on both sides of the support frame 541; a clamping groove 511 is provided on the inner side of the drive gear 51 near the centrifugal block 543, and the clamping groove 511 is adapted to be clamped with the clamping block 5432 extending into the shaft hole of the drive gear 51. That is, one end of the clamping block 5432 is embedded in the groove 211 extending into the shaft hole of the drive gear 51. When the hob shaft 21 rotates at a high speed, the centrifugal block 543 drives the slider 5431 to slide outward along the sliding groove 5411 due to the centrifugal force, and the part of the clamping block 5432 extending into the shaft hole of the drive gear 51 slides outward and enters the clamping groove 511 of the drive gear 51 and is clamped with the clamping groove 511, thereby driving the drive gear 51 to rotate synchronously with the hob shaft 21.

[0039] As Figure 5 、 6As shown in the figure, in order to facilitate the accuracy of the coaxiality between the sliding direction of the chute 5411 and the sliding direction of the groove 211 when the support frame 541 and the hob shaft 21 are installed, the groove 211 penetrates through the hob shaft 21, the chute 5411 is arranged directly above the support frame 541, the chute 5411 is communicated with the shaft hole of the support frame 541, the sliding direction of the chute 5411 is perpendicular to the shaft hole of the support frame 541, the chute 5411 is provided with a side opening facing the driving gear 51, and the cross section of the chute 5411 is U-shaped. The side opening of the chute 5411 also facilitates the installation of the block 5432; the end of the hob shaft 21 is provided with a necking portion 212, a part of the groove 211 is located on the necking portion 212, and a limiting protrusion 5412 opposite to the chute 5411 is arranged in the shaft hole of the support frame 541. The limiting protrusion 5412 is adaptively clamped with the groove 211 on the hob shaft 21.

[0040] When the centrifugal clutch mechanism 54 is assembled, first insert the hob shaft 21 into the support frame 541, then the limiting protrusion 5412 is embedded into the groove 211 on the hob shaft 21, then fix the support frame 541 on the hob shaft 21 with screws, embed the slider 5431 into the chute 5411 from top to bottom, and make the block 5432 embed into the groove 211. A part of the block 5432 is embedded into the groove 211 on the necking portion 212, and then install the driving gear 51 on the necking portion 212 of the hob shaft 21. At this time, the slot 511 of the driving gear 51 is close to the support frame 541 and surrounds the outside of the groove 211 on the necking portion 212. A snap spring is clamped at the end of the necking portion 212 to axially limit the driving gear 51. Finally, install the return spring 544 between the balance weight 542 and the support rod 5433.

[0041] As Figure 7 shown, the slot 511 includes a guiding section 5111 extending tangentially along the shaft hole of the driving gear 51, a chute section 5112 with a radius larger than the radius of the shaft hole of the driving gear 51, and a buckle section 5113 extending towards the center of the driving gear 51. The depth of the chute section 5112 is less than the height of the block 5432. In this way, it can be ensured that when the block 5432 abuts against the chute section 5112, it can be clamped with the buckle section 5113, and at the same time, a part of the block 5432 can be embedded in the groove 211, realizing the simultaneous clamping of the block 5432 on the hob shaft 21 and the driving gear 51, and ensuring the synchronous rotation of the hob shaft 21 and the driving gear 51.

[0042] As Figure 5 、 8 shown, when the driving motor 4 stops working, under the pulling force of the return spring 544, the block 5432 is completely embedded in the groove 211, and the hob shaft 21 and the driving gear 51 can rotate relative to each other.

[0043] As Figure 9As shown, when the drive motor 4 operates, the drive motor 4 drives the hob shaft 21 to rotate. The hob shaft 21 drives the support frame 541 and the centrifugal block 543 to rotate synchronously. Under the action of centrifugal force, the centrifugal block 543 overcomes the elastic force of the return spring 544 and slides outward along the chute 5411 and slides into the card slot 511 of the drive gear 51. When the rotating block 5432 abuts against the buckle section 5113 of the card slot 511, the rotating centrifugal block 543 drives the drive gear 51 to rotate synchronously, that is, when the drive motor 4 operates, it can drive the hob shaft 21 and the drive gear 51 to rotate synchronously; the drive gear 51 drives the internal gear ring 53 to rotate, and finally drives the traveling wheel 3 to rotate on the wheel shaft 31.

[0044] When the drive motor 4 operates, it can drive the hob set 22 to rotate with the hob shaft 21 for mowing grass, and can also drive the drive gear 51 to drive the internal gear ring 53 to rotate, thereby realizing the traveling of the traveling wheel 3 to drive the lawn mower.

[0045] The card slots 511 include a plurality of card slots 511 that are connected in sequence and evenly distributed on the outer side of the shaft hole of the drive gear 51.

[0046] As Figure 7 shown, in this embodiment, three card slots 511 are provided, and the three card slots 511 are annularly distributed along the shaft opening of the drive gear 51.

[0047] As Figure 1 、 11 shown, in an embodiment, there is also a hob set height adjustment mechanism 6 for adjusting the vertical distance between the hob shaft 21 and the ground to realize the adjustment of the mowing height. The hob set height adjustment mechanism 6 includes a cross bar 61, a connecting plate 62, a telescopic limiting rod set 63 and an arc-shaped adjusting tooth 64; the cross bar 61 is located at the front side of the machine shell 1, and both ends of the cross bar 61 are vertically and fixedly connected to the connecting plate 62, and the other ends of the two connecting plates 62 are respectively fixedly connected to the corresponding wheel shafts 31. The arc-shaped adjusting teeth 64 are respectively arranged on both sides of the machine shell 1. In this embodiment, the arc-shaped adjusting teeth 64 are arranged on the outer edge of the side plate 11. The telescopic limiting rod sets 63 are respectively arranged on both sides of the cross bar 61 and are clamped with the corresponding arc-shaped adjusting teeth 64, and the centers of the arc-shaped adjusting teeth 64 coincide with the center of the hob shaft 21.

[0048] The telescopic limit rod group 63 can be threadedly connected to the cross bar 61 by an adjusting screw rod. The end of the adjusting screw rod is formed into a cone shape and is clamped with the arc-shaped adjusting teeth 64, and the other end of the adjusting screw rod is threadedly connected with a locking nut. By rotating the adjusting screw rod, the adjusting screw rod can be clamped at different positions of the arc-shaped adjusting teeth 64, so as to realize the rotational positioning of the cross bar 61 with the cutter shaft 21 as the axis. The telescopic limit rod group 63 can also adopt other methods, as long as the cross bar 61 can be positioned at different positions of the arc-shaped adjusting teeth 64 through the telescopic limit rod group 63. In this process, since the tire 33 of the traveling wheel 3 is always in contact with the ground, that is, the height of the wheel shaft 31 fixedly connected to the height-adjusting rotating plate 52 relative to the ground is constant. If one side of the cross bar 61 is raised relative to the ground, the wheel shaft 31 will descend relative to the ground; if one side of the cross bar 61 is lowered relative to the ground, the wheel shaft 31 will rise relative to the ground. Thus, by adjusting the position of the cross bar 61 on the arc-shaped adjusting teeth 64, the height of the cutter shaft 21 relative to the ground is finally adjusted, that is, the purpose of adjusting the mowing height of the cutter group 22 on the cutter shaft 21 is achieved.

[0049] As Figure 4 shown, in an embodiment, a ring gear cover 531 for preventing impurities from entering the internal gear ring 53 is fixedly connected to the height-adjusting rotating plate 52.

[0050] As Figure 2 shown, a shaft rod 7 is fixedly connected between the rear bottoms of the two side plates 11, and a plurality of auxiliary rollers 71 are rotatably connected to the shaft rod 7 along the length direction.

[0051] By providing the auxiliary rollers 71, a stable support can be formed with the two traveling wheels 3, which is convenient for the movement of the lawn mower. An armrest can be installed on the machine housing 1, and by holding the armrest, the direction control of the lawn mower can be realized. When the drive motor 4 stops working, the centrifugal block 543 is completely embedded in the slot 211 of the cutter shaft 21, and the block 5432 is separated from the drive gear 51. The cutter shaft 21 can rotate freely on the height-adjusting rotating plate 52, and the internal gear ring 53 can also drive the drive gear 51 to rotate freely, realizing the function of freely pushing the lawn mower forward and backward, which is convenient for the free turning of the lawn mower.

[0052] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A self-propelled rotary mower with a built-in motor, characterized in that, Including: Housing; Hob assembly, including a hob shaft and a hob set, the hob shaft is rotatably connected to the housing, and the hob set is fixed on the hob shaft for cutting work; Traveling wheels, located on both sides of the hob assembly respectively, the traveling wheels include a wheel axle, a hub rotatably connected to the wheel axle, and a tire connected to the outside of the hub, facilitating the forward movement of the lawn mower; Drive motor, built inside the hob assembly, used to drive the rotation of the hob shaft; Clutch drive assembly, located between the hob shaft and the corresponding traveling wheel, used to control the rotation of the traveling wheel; when the drive motor works, the clutch drive assembly is used to control the synchronous rotation of the hob shaft and the traveling wheel; when the drive motor does not work, the traveling wheel can rotate freely on the wheel axle.

2. The self-propelled rotary mower with a built-in motor according to claim 1, characterized in that, The clutch drive assembly includes a drive gear, a height-adjusting rotating plate, an internal gear ring, and a centrifugal clutch mechanism; one side of the height-adjusting rotating plate is rotatably connected to the hob shaft, the other side of the height-adjusting rotating plate is fixedly connected to the wheel axle, the internal gear ring is fixedly connected to the inner edge of the hub, the drive gear is rotatably connected to the hob shaft outside the height-adjusting rotating plate, and the drive gear meshes with the internal gear ring; the centrifugal clutch mechanism is arranged between the hob shaft and the drive gear, used to control the engagement or separation of the hob shaft and the drive gear.

3. The self-propelled rotary mower with a built-in motor according to claim 2, characterized in that, The centrifugal clutch mechanism includes a balance weight, a support frame, centrifugal blocks, and a return spring. The hob shaft passes through the balance weight and the drive gear in sequence. An inwardly concave groove is provided on the hob shaft along the axial direction, and the groove extends into the shaft hole of the drive gear. A sliding groove communicating with the groove is provided on the balance weight, and the sliding direction of the sliding groove is coaxial with the sliding direction of the groove. The support frame is fixedly connected to the hob shaft, and the support frame is fixedly connected to the side of the balance weight opposite to the sliding groove. The centrifugal blocks are T-shaped, and each centrifugal block includes a slider adapted to the sliding groove. One end of the slider is fixedly connected to a clamping block adapted to the groove, and the other end of the slider is fixedly connected to a support rod opposite to the support frame. A pair of return springs are connected between the support frame and the support rod, and the two return springs are located on both sides of the balance weight; a clamping groove is provided on the inner side of the drive gear near the centrifugal block, and the clamping groove is adapted to be engaged with the clamping block extending into the shaft hole of the drive gear.

4. The self-propelled rotary mower with a built-in motor according to claim 3, characterized in that, The clamping groove includes a guiding section extending along the tangent direction of the shaft hole of the drive gear, a sliding groove section with a radius larger than the radius of the shaft hole of the drive gear, and a buckling section extending towards the center of the drive gear. The depth of the sliding groove section is less than the height of the clamping block.

5. The self-propelled rotary mower with a built-in motor according to claim 4, characterized in that, There are multiple clamping grooves, and the multiple clamping grooves are connected in sequence and evenly distributed on the outside of the shaft hole of the drive gear.

6. The self-propelled rotary mower with a built-in motor according to claim 2, wherein, It also includes a hob set height adjustment mechanism, which includes a cross bar, a connecting plate, a telescopic limiting rod set, and an arc-shaped adjusting tooth; the cross bar is located at the front side of the housing, both ends of the cross bar are vertically and fixedly connected to the connecting plates respectively, the other ends of the two connecting plates are respectively fixedly connected to the corresponding wheel axles, the arc-shaped adjusting teeth are respectively arranged on both sides of the housing, the telescopic limiting rod sets are respectively arranged on both sides of the cross bar and are engaged with the corresponding arc-shaped adjusting teeth, and the centers of the arc-shaped adjusting teeth coincide with the center of the hob shaft.

7. The self-propelled rotary mower with a built-in motor according to claim 1, characterized in that, The hob set includes a support plate and a hob. The support plates are spaced apart along the length direction of the hob shaft, and the support plates are fixedly connected to the hob shaft. The hob extends along the length direction of the hob shaft and is fixedly connected to the outside of the support plate. The hob is strip-shaped and extends in a spiral shape.

8. The self-propelled rotary mower with a built-in motor according to claim 1, characterized in that, The driving motor is arranged at one end of the hob shaft. The driving motor includes a housing, a stator coil and a stator bracket. The two ends of the housing are respectively fixedly connected to the corresponding support plates. The stator bracket is rotatably connected to the hob shaft through a bearing, and the stator coil is fixed to the outside of the stator bracket.

9. The self-propelled rotary mower with a motor built therein according to claim 1, characterized in that, The machine housing includes side plates and a cover body. The side plates are arranged at both ends of the hob shaft and are rotatably connected to the hob shaft through bearings. The cover body is fixedly connected between the two side plates. The cover body includes a top plate and a baffle. The top plate is horizontally arranged, and the baffle extends downward along the front end of the top plate. The cover body is integrally in an L shape.

10. The self-propelled rotary mower with a built-in motor according to claim 9, characterized in that, A shaft rod is fixedly connected between the rear bottoms of the two side plates, and a plurality of auxiliary rollers are rotatably connected to the shaft rod along the length direction.

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