Hand-propelled power tool

Abstract

This application discloses a push-type power tool, which includes a motor, a main unit, a walking mechanism, a handle, and an operating device. The motor drives a cutting element to rotate for mowing. The main unit houses at least part of the motor. The walking mechanism includes wheels. The handle is connected to the main unit and is configured for user gripping. The operating device is configured for user operation and includes a first operating element and a second operating element. The first operating element is movable relative to the handle to control the walking mode of the push-type power tool, and the second operating element is movable relative to the handle to control the output power of the push-type power tool. This push-type power tool, by having a first operating part on the first operating element located on the side of the handle away from the user, and a second operating part on the second operating element located on the side of the handle closer to the user, allows for flexible manipulation of the first operating part when the push-type power tool turns, making operation convenient, time-saving, and labor-saving.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and more particularly to a hand-push power tool. Background Technology

[0002] A lawnmower is a common power tool used in landscaping, widely used in parks, communities, farms, and other areas with abundant vegetation for trimming lawns and shrubs. For areas with large vegetated areas, walk-behind lawnmowers are more convenient to operate and more efficient, thus enjoying wider adoption. The handle of a walk-behind lawnmower typically includes a self-propelled trigger and a blade trigger. Operating the self-propelled trigger controls the self-propelled function, while operating the blade trigger controls the cutting function of the blades.

[0003] In existing push lawnmowers, the blade trigger is typically positioned in front, and the self-propelled trigger is behind. Users control the self-propelled trigger with their palm and operate the blade trigger with their fingers while holding the handle. However, push lawnmowers inevitably need to turn during mowing, requiring the self-propelled function to stop. This is inconvenient due to the limited dexterity of the hand. Furthermore, after turning, the user's hand needs to reach and grip the self-propelled trigger again, a large movement that is time-consuming and laborious. Summary of the Invention

[0004] The purpose of this application is to provide a hand-push power tool that is easy to operate when turning, saving time and effort.

[0005] To achieve this objective, the following technical solution is adopted in this application:

[0006] A push-type power tool includes: a motor for driving a cutting element to rotate to mow grass; a main unit housing at least a portion of the motor; a walking device including wheels; a handle connected to the main unit and configured for a user to hold; and an operating device configured for operation by the user. The operating device includes: a first operating member movable relative to the handle to control the walking mode of the push-type power tool; and a second operating member movable relative to the handle to control the output power of the push-type power tool. The first operating member includes a first operating portion disposed on the side of the handle away from the user, and the second operating member includes a second operating portion disposed on the side of the handle closer to the user.

[0007] Preferably, the first operating part is configured to allow the user to rotate it toward the handle at a certain angle, the angle being greater than or equal to 10° and less than or equal to 60°.

[0008] Preferably, the push-type power tool further includes a mounting shaft connected to the handle via a connector, and the operating device is disposed on the mounting shaft.

[0009] Preferably, the push-type power tool further includes a switch box disposed on the mounting shaft, the switch box being operated by the user to control the push-type power tool.

[0010] Preferably, the hand-operated power tool includes a sensing device circumferentially disposed relative to the mounting axis, the sensing device being configured to sense the operating device.

[0011] Preferably, the sensing device includes a first magnetic element and a first magnetic sensor.

[0012] Preferably, the handle includes a connecting part that is mounted to the host and a gripping part for the user to hold, the gripping part being integrally formed with the connecting part.

[0013] Preferably, the push-type power tool further includes a front height adjustment mechanism for adjusting the height of the front of the main unit relative to the ground. The front height adjustment mechanism includes a first elastic element and a front height adjustment shaft. One end of the first elastic element is connected to the main unit, and the other end of the first elastic element is connected to the front height adjustment shaft.

[0014] Preferably, the push-type power tool further includes a rear height adjustment mechanism for adjusting the height of the rear of the main unit relative to the ground. The rear height adjustment mechanism includes a second elastic element and a rear height adjustment shaft. One end of the second elastic element is connected to the main unit, and the other end of the second elastic element is connected to the rear height adjustment shaft.

[0015] Preferably, the push-type power tool further includes a handle height adjustment mechanism, which includes an outer gear plate, an inner gear plate, and a knob. The inner gear plate is mounted on the main unit, and the outer gear plate and the inner gear plate are rotatably engaged. The knob passes through the connecting part of the handle and is movably connected to the outer gear plate.

[0016] The beneficial effects of this application are:

[0017] The hand-push power tool provided in this application includes a motor, a main unit, a walking mechanism, a handle, and an operating device. The motor drives a cutting element to rotate for mowing. The main unit houses at least part of the motor. The walking mechanism includes wheels. The handle is connected to the main unit and is configured for user gripping. The operating device is configured for user operation and includes a first operating element and a second operating element. The first operating element is movable relative to the handle to control the walking mode of the hand-push power tool, and the second operating element is movable relative to the handle to control the output power of the hand-push power tool. This hand-push power tool, by having a first operating part on the first operating element located on the side of the handle away from the user, and a second operating part on the second operating element located on the side of the handle closer to the user, allows for flexible manipulation of the first operating part when the hand-push power tool turns, making operation convenient, time-saving, and labor-saving. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the push-type lawnmower provided in this application;

[0019] Figure 2 This is a structural schematic diagram of the handle, operating device, and sensing device of the push lawnmower provided in this application;

[0020] Figure 3 This is an exploded view of the handle, operating device, and sensing device of the push lawnmower provided in this application;

[0021] Figure 4 This is an exploded view of the operating device and sensing device of the push lawnmower provided in this application from one perspective;

[0022] Figure 5 This is an exploded view of the operating device and sensing device of the push lawnmower provided in this application from another perspective;

[0023] Figure 6 This is an exploded view of the operating device and sensing device of the push lawnmower provided in this application from another perspective;

[0024] Figure 7 This is a side view of the push lawnmower provided in this application;

[0025] Figure 8 yes Figure 7 A cross-sectional view along the AA direction;

[0026] Figure 9 yes Figure 8 Enlarged view of section B;

[0027] Figure 10 This is a top view of the base plate, walking device, front height adjustment mechanism and rear height adjustment mechanism of the push lawnmower provided in this application;

[0028] Figure 11 This is a bottom view of the base plate, walking device, front height adjustment mechanism and rear height adjustment mechanism of the push lawnmower provided in this application;

[0029] Figure 12 This is a structural schematic diagram of the base plate, walking device, front height adjustment mechanism and rear height adjustment mechanism of the push lawnmower provided in this application;

[0030] Figure 13 This is a schematic diagram of the front height adjustment mechanism of the push lawnmower provided in this application from a certain perspective;

[0031] Figure 14 This is a schematic diagram of the front height adjustment mechanism of the push lawnmower provided in this application from another perspective;

[0032] Figure 15 This is a schematic diagram of the rear height adjustment mechanism of the push lawnmower provided in this application from a certain perspective.

[0033] Figure 16 This is a schematic diagram of the rear height adjustment mechanism of the push lawnmower provided in this application from another perspective.

[0034] In the picture:

[0035] 10. Hand-operated power tools;

[0036] 100. Host computer;

[0037] 200. Walking device;

[0038] 300. Handle; 301. Connecting part; 302. Grip part;

[0039] 41. Operating device; 42. Sensing device;

[0040] 401. First operating component; 4011. First operating part; 402. Second operating component; 4021. Second operating part; 403. First magnetic element; 404. First magnetic sensor; 405. Second magnetic element; 406. Second magnetic sensor; 407. Mounting shaft; 408. Fixing component; 4081. First mounting groove; 409. First rotating component; 410. Second rotating component; 4101. Second mounting groove; 411. Third magnetic element; 412. Third magnetic sensor; 413. Speed ​​regulating component; 4131. Third mounting groove; 414. Mounting sleeve; 415. Switch box; 416. Connecting component; 417. Connecting cover;

[0041] 500. Handle height adjustment mechanism; 501. Internal gear plate; 502. External gear plate; 503. Knob; 504. Support plate; 505. Rubber pad;

[0042] 600. Front height adjustment mechanism; 601. Front wheel axle; 602. Front height adjustment pivot; 603. Front spring; 604. Front locking element; 605. Front gear shift plate; 606. First elastic element;

[0043] 700. Rear height adjustment mechanism; 701. Rear wheel axle; 702. Rear height adjustment pivot; 703. Rear clamp; 704. Rear plate; 705. Rear gear plate; 706. Second elastic element; 707. Drive shaft; 708. Gear assembly;

[0044] 800, tension spring hook;

[0045] 910. Motor; 920. Cutting parts. Detailed Implementation

[0046] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] This application discloses a push-type power tool 10. In some specific embodiments, the push-type power tool 10 can be a push-type lawnmower. Of course, in addition to push-type lawnmowers, in other embodiments, the push-type power tool 10 can also be other push-type power tools with an operating device 41 for user operation. Specific types are not listed here. The following uses a push-type lawnmower as an example to describe the specific structure of the push-type power tool 10.

[0050] like Figures 1 to 16 As shown, the push-type power tool 10 includes a motor 910, a mowing component, a main unit 100, a walking mechanism 200, a handle 300, and an operating device 41. Specifically, the motor 910 is the main power element, used to drive the mowing component 920 to rotate for mowing. The mowing component is a cutting blade, and multiple cutting blades can be provided as needed. The main unit 100 is the main mounting component, used to house at least part of the motor 910, and to mount the handle 300 and the walking mechanism 200. The walking mechanism 200 includes wheels, including front wheels and rear wheels, and the number of front wheels and rear wheels can be multiple as needed. In some specific embodiments, such as... Figure 1 As shown, the main unit 100 is equipped with two front wheels and two rear wheels. The handle 300 is connected to the main unit 100 and is configured for the user to hold.

[0051] The operating device 41 is configured for user operation, allowing the hand-operated power tool 10 to switch operating modes by operating the device 41. Specifically, the operating device 41 includes a first operating member 401 and a second operating member 402. The first operating member 401 is movable relative to the handle 300 to control the walking mode of the hand-operated power tool 10, and the second operating member 402 is movable relative to the handle 300 to control the output power of the hand-operated power tool 10. The first operating member 401 includes a first operating part 4011 disposed on the side of the handle 300 away from the user, and the second operating member 402 includes a second operating part 4021 disposed on the side of the handle 300 closer to the user.

[0052] Because the push-type power tool 10 needs to frequently turn during lawn mowing, it generally needs to stop its self-propelled function during turning, but the cutting operation needs to continue. Therefore, when the user operates the push-type power tool 10 to turn, the first operating member 401 needs to be operated, and the state of the second operating member 402 needs to be kept unchanged. This application places the first operating member 401 on the side away from the user, so that the user can operate the first operating member 401 with their fingers, which is flexible, convenient and labor-saving. The second operating member 402 is placed on the side closer to the user, so that the user can use their palm to hold the second operating member 402, so as to stably keep the state of the second operating member 402 unchanged.

[0053] In some specific embodiments, the first operating part 4011 is configured to allow the user to rotate towards the handle 300 at a certain angle, which is greater than or equal to 10° and less than or equal to 60°. For example, the angle can be 10°, 20°, 30°, 40°, 50°, or 60°. The second operating part 4021 is configured to allow the user to rotate towards the handle 300 at a certain angle, which is greater than or equal to 10° and less than or equal to 60°. For example, the angle can be 10°, 20°, 30°, 40°, 50°, or 60°. The maximum angle that the first operating part 4011 can rotate and the maximum angle that the second operating part 4021 can rotate can be the same or different. In this application, no specific limitation is made.

[0054] Continue to refer to Figure 2 As shown, the handle 300 includes two connecting portions 301 and a grip portion 302. The two connecting portions 301 are connected to both sides of the grip portion 302. The connecting portions 301 are used to connect to the main unit 100, and the grip portion 302 is used for the user to hold. In the working direction of this push-type power tool 10, the first operating portion 4011 and the second operating portion 4021 are located on both sides of the grip portion 302. In some embodiments, the grip portion 302 and the connecting portions 301 are integrally formed; in some other embodiments, the grip portion 302 and the connecting portion 301 are independent parts, and the two are connected by a connector 416.

[0055] Furthermore, in some more specific embodiments, the two connecting portions 301 and the grip portion 302 are connected in a U-shaped rod structure; in some other embodiments, the grip portion 302 has a U-shaped rod structure, with the two connecting portions 301 connected to the two free ends of the grip portion 302 respectively, and the plane containing the two connecting portions 301 forms an angle with the plane containing the grip portion 302. This arrangement makes it more convenient for the user to grip the handle 300. Furthermore, both the first operating member 401 and the second operating member 402 have U-shaped rod structures, and the first operating portion 4011 and the second operating portion 4021 are both arranged parallel to the portion of the grip portion 302 that is held by the user, and are located on both sides of the grip portion 302.

[0056] In order to rotate and fix the operating device 41 to both sides of the grip portion 302 of the handle 300, continue to refer to Figures 3 to 6 As shown, the push-type power tool 10 also includes a connector 416 and a mounting shaft 407. The mounting shaft 407 is connected to the handle 300 via the connector 416, and the operating device 41 is mounted on the mounting shaft 407.

[0057] In some embodiments, the mounting shaft 407 is a hollow cylindrical rod, and the connector 416 is a plate-like structure. A connector 416 is provided at each end of the mounting shaft 407. One end of the connector 416 is connected to the mounting shaft 407, and the other end is connected to the connecting portion 301 of the handle 300 on the corresponding side. In some more specific embodiments, the connector 416 is welded to the connecting portion 301, and the mounting shaft 407 is connected to the connector 416 via a snap-fit ​​connection. The mounting shaft 407 is connected to the connecting portion 301 via the connector 416, and the connector 416 is welded to the connecting portion 301. This avoids directly mounting the mounting shaft 407 to the connecting portion 301 with screws, thus avoiding the need to drill multiple holes in the connecting portion 301. The strength of the handle 300 is ensured, and the installation of the mounting shaft 407 is simple and stable. A connecting cover 417 is also provided at each connector 416. The connecting cover 417 includes a split first half cover and a second half cover. A first half cover is formed on the first half cover, and a second half cover is formed on the second half cover. When the first half cover and the second half cover are fastened together from both sides of the connecting part 301 of the handle 300, the first half cover and the second half cover form a circular hole to accommodate the connecting part 301. When assembling the connecting cover 417, the first half cover and the second half cover can be assembled from the connector 416 and the left and right sides of the handle 300 first. After the first half cover and the second half cover are assembled, they are fixed with connecting screws. Furthermore, the first half cover and the second half cover have different shapes. The first half cover covers the entire connector 416, and the second half cover covers part of the connector 416. The two ends of the mounting shaft 407 are respectively connected to the two connectors 416. The connecting part 301 is hollow to allow wires to pass through. The connecting part 301 includes a wiring hole, and the connector 416 includes a guide groove. The wire passes through the wiring hole, exits the connecting part 301, is guided by the guide groove, and passes through the mounting shaft 407.

[0058] In some other embodiments, the mounting shaft 407 can also be directly connected to the handle 300. For example, the two ends of the mounting shaft 407 can be welded directly to the two connecting portions 301 of the handle 300, or the mounting shaft 407 can be connected to the intermediate structure of the grip portion 302 via a connecting plate. Furthermore, the connection method between the mounting shaft 407 and the connector 416 is not limited to snap-fit ​​connection; in addition to snap-fit ​​connection, screw connection, welding, magnetic attraction, or adhesive bonding can also be used. Similarly, the connection method between the connector 416 and the connecting portion 301 is not limited to welding; it can also be snap-fit ​​connection, screw connection, magnetic attraction, or adhesive bonding.

[0059] Continue to refer to Figures 3 to 6As shown, the push-type power tool 10 also includes a sensing device 42 circumferentially arranged relative to the mounting shaft 407. The sensing device 42 is configured to sense the operating device 41. Specifically, the sensing device 42 includes a first magnetic element 403 and a first magnetic sensor 404. The first magnetic element 403 can rotate synchronously with the first operating part 4011. The first magnetic sensor 404 is fixedly arranged relative to the handle 300 and is used to sense the first magnetic element 403. When the first magnetic sensor 404 senses the first magnetic element 403, it can send a signal to the control mechanism of the push-type power tool 10. The control mechanism can then control the lawnmower's walking mode to change according to the signal.

[0060] In some embodiments, the first magnetic element 403 is a magnet, and the first magnetic sensor 404 is a Hall element. The cooperation between the Hall element and the magnet is safe and reliable. The Hall element and the magnet move relative to each other in the circumferential direction. The smaller movement distance of the magnet corresponds to the larger movement distance of the first operating part 4011. No matter where the first operating part 4011 moves, the magnet remains within the sensing range of the Hall element, making the sensing more sensitive. This arrangement is also safer, as even if the user accidentally loosens their grip slightly while pressing the first operating part 4011, the Hall element can still sense the magnet. In other words, the user has a larger margin of error when operating the first operating part 4011, and the tolerance for error is higher. The user's hand does not need to press the first operating part 4011 tightly, making operation more convenient.

[0061] Continue to refer to Figures 3 to 6 As shown, the sensing device 42 includes a second magnetic element 405 and a second magnetic sensor 406. The second magnetic element 405 can rotate synchronously with the second operating part 4021. The second magnetic sensor 406 is fixedly disposed relative to the handle 300 and is used to sense the second magnetic element 405. When the second magnetic sensor 406 senses the second magnetic element 405, it can send a signal to the control mechanism of the push-type power tool 10, and control the output power of the lawnmower to change according to the signal. In some embodiments, the second magnetic element 405 is a magnet block, and the second magnetic sensor 406 is a Hall element, and the cooperation between the Hall element and the magnet block is safe and reliable.

[0062] To achieve the rotational connection between the first operating member 401 and the mounting shaft 407, and to achieve the rotational connection between the second operating member 402 and the mounting shaft 407, continue referring to... Figures 3 to 6 As shown, the sensing device 42 also includes two sets of rotating connection components. Each set of rotating connection components includes a fixing member 408, a first rotating member 409, and a second rotating member 410. The two rotating connection components are respectively arranged on both sides of the mounting shaft 407 in the axial direction, and the end of the rotating connection component away from the mounting shaft 407 abuts against the corresponding side of the connecting member 416.

[0063] The fastener 408 is located on the side of the mounting shaft 407. The fastener 408 is a stepped columnar structure, which specifically includes a first rotating support part, a partition part and a second rotating support part connected in sequence. The diameter of the partition part is larger than the diameters of the first rotating support part and the second rotating support part. The diameters of the first rotating support part and the second rotating support part can be the same or different.

[0064] Both the first rotating member 409 and the second rotating member 410 are annular structures. The first rotating member 409 is rotatably connected to the outside of the first rotating support. The end of the first operating member 401 is fixedly connected to the first rotating member 409. The first magnetic element 403 is disposed in the first groove of the first rotating member 409, and the first magnetic sensor 404 is disposed in the first mounting groove 4081 on the first rotating support. This not only avoids contamination of the Hall element but also prevents users from bringing magnetic materials near the hand-operated power tool 10, thus preventing accidents. When the first operating member 401 is rotated by the user's finger toward or away from the grip portion 302 of the handle 300, the first operating member 401 can drive the first rotating member 409 to rotate around the first rotating support, thereby changing the position of the first magnetic element 403. After detecting the change in the magnetic field of the first magnetic element 403, the first magnetic sensor 404 can send a signal to the control mechanism.

[0065] The second rotating member 410 is rotatably connected to the outside of the second rotating support. The end of the second operating member 402 is fixedly connected to the second rotating member 410. The second magnetic element 405 is disposed in the second mounting groove 4101 of the second rotating member 410. The second magnetic sensors 406 are disposed in the second grooves on the first rotating support. When the first operating member 401 is rotated towards or away from the grip portion 302 of the handle 300 by the user's palm, the second operating member 402 can drive the second rotating member 410 to rotate around the second rotating support, thereby changing the position of the second magnetic element 405. After the second magnetic sensor 406 detects the change in the magnetic field of the second magnetic element 405, it can send a signal to the control mechanism.

[0066] In some embodiments, the end of the first operating member 401 is inserted into the first rotating member 409. The first rotating member 409 has a first insertion portion with a first insertion hole. The first operating member 401 has a U-shaped rod structure, and the end of the first operating member 401 can be inserted into the first insertion hole to assemble the first operating member 401 with the first rotating member 409. The end of the second operating member 402 is inserted into the second rotating member 410. The second rotating member 410 has a second insertion portion with a second insertion hole. The second operating member 402 has a U-shaped rod structure, and the end of the second operating member 402 can be inserted into the second insertion hole to assemble the second operating member 402 with the second rotating member 410.

[0067] Furthermore, the push-type power tool 10 also includes a switch box 415 mounted on a mounting shaft 407. The switch box 415 is operated by the user to control the push-type power tool 10. For mounting the switch box 415, a mounting sleeve 414 is fitted over the mounting shaft 407, and the switch box 415 is mounted on the mounting sleeve 414. By mounting the switch box 415 on the mounting shaft 407, it is less likely to interfere with the handle 300, providing ample grip space and facilitating user operation of the push-type power tool 10. The switch box 415 includes a headlamp switch for controlling overhead lighting, a start / stop switch for controlling the motor 910, and a power switch for controlling the power supply of the entire tool. Positioning all switches on the switch box 415 avoids the need to machine holes or slots in the handle 300, simplifying user operation and reducing assembly difficulty.

[0068] Furthermore, the hand-operated power tool 10 also has a speed-adjustable mode. To control the speed-adjustable mode, the sensing device 42 further includes a speed-adjusting component 413, a third magnetic element 411, and a third magnetic sensor 412. The speed-adjusting component 413 is sleeved on the mounting shaft 407 and has a speed-adjusting handle for easy rotation by the user. A third mounting groove 4131 is provided on the speed-adjusting component 413, and the third magnetic element 411 is installed in the third mounting groove 4131. The third magnetic sensor 412 is located inside the switch box 415. The switch box 415 contains a PCB board for controlling the headlamp switch, and the third magnetic sensor 412 is located on the side of the PCB board facing the third magnetic element 411. In some specific embodiments, the third magnetic element 411 is a magnet, and the third magnetic sensor 412 is a Hall effect sensor.

[0069] To facilitate operation of this hand-operated power tool 10 by users of different heights, such as... Figures 7 to 9As shown, the push-type power tool 10 also includes a handle height adjustment mechanism 500. The handle height adjustment mechanism 500 includes an outer gear plate 502, an inner gear plate 501, and a knob 503. The inner gear plate 501 is mounted on the main unit 100. The outer gear plate 502 and the inner gear plate 501 rotate and mesh. The knob 503 passes through the connecting part 301 of the handle 300 and is movably connected to the outer gear plate 502.

[0070] In some embodiments, a support plate 504 is provided between the internal gear plate 501 and the main unit 100. The internal gear plate 501 is connected to the support plate 504 via a connector 416. The support plate 504 is also marked with a height level scale. An indicator mark is provided on the external gear plate 502. Through the correspondence between the indicator mark and the numbers on the height level scale, the user can clearly know the current height level of the handle 300.

[0071] In some embodiments, a rubber pad 505 is provided between the connecting portion 301 of the handle 300 and the outer gear plate 502. The rubber pad 505 can increase the friction between the two, thereby improving the connection strength and connection stability.

[0072] Furthermore, such as Figures 10 to 14 As shown, the push-type power tool 10 also includes a front height adjustment mechanism 600, which is used to adjust the height of the front of the main unit 100. Specifically, the front height adjustment mechanism 600 includes a front wheel axle 601, a front height adjustment pivot 602, a front spring plate 603, a front locking piece 604, and a front gear plate 605. The front wheel axle 601 is fixedly connected to the side of the front of the main unit 100 and is used to mount the front wheel. The front height adjustment pivot 602 is arranged parallel to the line where the two front wheel axles 601 are located, and the front height adjustment pivot 602 and the two front wheel axles 601 are connected by a linkage to form a linkage mechanism. The front height adjustment pivot 602 is fixedly connected to the base plate of the main unit 100. One end of the front locking piece 604 is fitted onto the front wheel axle 601, and the other end of the front locking piece 604 is connected to a front spring plate 603. By applying force to the front spring plate 603, the user can move the front spring plate 603 and the front locking piece 604 away from the main unit 100, thereby unlocking the locking block on the front locking piece 604 from the front gear shift plate 605. The front gear shift plate 605 has multiple front gear shift holes, and the locking block on the front locking piece 604 engages with one of the front gear shift holes to limit the height of the front of the main unit 100.

[0073] When the user needs to adjust the height of the front of the main unit 100, the front spring 603 can be moved towards the side closer to the front wheel to unlock the front locking piece 604 and the front gear plate 605. Then, the height of the front of the main unit 100 can be adjusted by applying force to the front height adjustment pivot 602. At this time, the front locking piece 604 rotates around the front wheel axle 601. Finally, after the height of the front of the main unit 100 is adjusted to the correct position, the front spring 603 can be released to reset the front locking piece 604 and re-lock it with the front gear plate 605.

[0074] Furthermore, the front height adjustment mechanism 600 also includes a first elastic element 606. One end of the first elastic element 606 is connected to the main unit 100, and the other end is connected to the front height adjustment pivot 602. Since the base plate of the main unit 100 will fall under gravity when adjusting the front height, the elastic force of the first elastic element 606 can counteract the gravity, allowing the user to easily adjust the height by simply holding the base plate, saving time and effort. In some specific embodiments, the first elastic element 606 is a torsion spring, which is sleeved on the front height adjustment pivot 602, with one end abutting against the base plate of the main unit 100 and the other end connected to a fixed plate fixed to the front height adjustment pivot 602.

[0075] Furthermore, such as Figures 10 to 12 , Figure 15 as well as Figure 16 As shown, the push-type power tool 10 also includes a rear height adjustment mechanism 700, which is used to adjust the height of the rear of the main unit 100. Specifically, the rear height adjustment mechanism 700 includes a rear wheel axle 701, a rear height adjustment pivot 702, a rear clamp 703, a rear plate 704, a rear gear plate 705, a drive shaft 707, and a gear assembly 708. The rear wheel axle 701 is fixedly connected to the side of the rear of the main unit 100 and is used to mount the rear wheel. The rear height adjustment pivot 702 is arranged parallel to the line where the two rear wheel axles 701 are located, and the rear height adjustment pivot 702 and the two rear wheel axles 701 form a linkage mechanism through the rear plate 704. The rear height adjustment pivot 702 is fixedly connected to the base plate of the main unit 100. One end of the rear plate 704 is fitted onto the rear wheel axle 701, and the other end of the rear plate 704 is connected to a rear locking member 703. The user can move the rear locking member 703 away from the main unit 100 by applying force to it. The rear gear plate 705 has multiple rear gear slots, and the rear locking member 703 engages with one of these slots to limit the height of the rear of the main unit 100. The drive shaft 707 is connected to the rear wheel axle 701 via a gear assembly 708, and is used to connect a motor that drives the wheels.

[0076] Furthermore, the rear height adjustment mechanism 700 also includes a second elastic element 706. One end of the second elastic element 706 is fixedly connected to the main unit 100, and the other end of the second elastic element 706 is fixedly connected to the rear height adjustment pivot 702. Since the base plate of the main unit 100 will fall under the action of gravity when adjusting the height of the rear of the main unit 100, the elastic force of the second elastic element 706 can counteract the gravity. The user only needs to gently assist the base plate to carry out the height adjustment operation, saving time and effort.

[0077] In some specific embodiments, the second elastic element 706 is a tension spring, one end of which is connected to a tension spring hook 800 provided on the base plate of the main unit 100, and the other end is fixedly connected to the rear height adjustment shaft 702.

[0078] The hand-push power tool 10 also includes a control mechanism, which can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control the various electronic components included in the hand-push power tool 10 to achieve their functions.

[0079] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. Hand-operated power tools, including: A motor (910) drives the cutter (920) to rotate to cut grass; The main unit (100) houses at least a portion of the motor (910). The walking device (200) includes walking wheels; A handle (300) is connected to the host (100) and configured for a user to hold. The handle (300) includes a connecting part (301) installed to the host (100) and a gripping part (302) for the user to grasp. The operating device (41) is configured for operation by the user; the hand-push power tool also includes a mounting shaft (407) connected to the handle (300) via a connector (416). The operating device (41) is characterized in that it is disposed on the mounting shaft (407), and the operating device (41) comprises: A first operating element (401) is movable relative to the handle (300) to control the walking mode of the hand-operated power tool; The second operating element (402) is movable relative to the handle (300) to control the output power of the push-type power tool; The first operating element (401) includes a first operating part (4011) disposed on the side of the handle (300) away from the user, the first operating part (4011) being configured to allow the user to rotate towards the handle (300) at a certain angle, the angle being greater than or equal to 10° and less than or equal to 60°; the second operating element (402) includes a second operating part (4021) disposed on the side of the handle (300) close to the user, the second operating part (4021) being configured to allow the user to rotate towards the handle (300) at a certain angle, the angle being greater than or equal to 10° and less than or equal to 60°; The first operating member (401) and the second operating member (402) are both U-shaped rod structures. The first operating part (4011) and the second operating part (4021) are both arranged parallel to the part of the grip (302) for the user to hold, and are located on both sides of the grip (302). The push-type power tool also includes a switch box (415) disposed on the mounting shaft (407), the switch box (415) being operated by the user to control the push-type power tool.

2. The hand-operated power tool according to claim 1, characterized in that, The hand-operated power tool also includes a sensing device (42) arranged circumferentially relative to the mounting shaft (407), the sensing device (42) being configured to sense the operating device (41).

3. The hand-operated power tool according to claim 2, characterized in that, The sensing device (42) includes a first magnetic element (403) and a first magnetic sensor (404).

4. The hand-operated power tool according to claim 1, characterized in that, The gripping part (302) and the connecting part (301) are integrally formed.

5. The hand-operated power tool according to any one of claims 1-4, characterized in that, The push-type power tool also includes a front height adjustment mechanism (600), which is used to adjust the height of the front of the main unit (100) relative to the ground. The front height adjustment mechanism (600) includes a first elastic element (606) and a front height adjustment shaft (602). One end of the first elastic element (606) is connected to the main unit (100), and the other end of the first elastic element (606) is connected to the front height adjustment shaft (602).

6. The hand-operated power tool according to any one of claims 1-4, characterized in that, The push-type power tool also includes a rear height adjustment mechanism (700), which is used to adjust the height of the rear of the main unit (100) relative to the ground. The rear height adjustment mechanism (700) includes a second elastic element (706) and a rear height adjustment shaft (702). One end of the second elastic element (706) is connected to the main unit (100), and the other end of the second elastic element (706) is connected to the rear height adjustment shaft (702).

7. The hand-operated power tool according to any one of claims 1-4, characterized in that, The hand-push power tool also includes a handle height adjustment mechanism (500), which includes an outer gear plate (502), an inner gear plate (501), and a knob (503). The inner gear plate (501) is mounted on the main unit (100). The outer gear plate (502) and the inner gear plate (501) are rotatably engaged. The knob (503) passes through the connecting part (301) of the handle (300) and is movably connected to the outer gear plate (502).

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