Garden machinery self-walker and garden machinery

Abstract

This invention discloses a self-propelled garden machinery device and garden machinery. The self-propelled garden machinery device includes a housing, a transmission mechanism, and a motor. The transmission mechanism is located inside the housing and includes a driving wheel, a driven wheel, and an idler wheel clutch assembly. The idler wheel clutch assembly includes an idler wheel that meshes with the driving wheel and is slidably mounted on the housing to achieve engagement and disengagement between the idler wheel and the driven wheel. The motor drives the driving wheel to rotate, thereby causing the idler wheel to slide on the housing. A garden machinery device, including the aforementioned self-propelled garden machinery device, also includes wheels and a connecting assembly for connecting the wheels to the self-propelled garden machinery device. This invention provides a self-propelled garden machinery device and garden machinery that achieves automatic idler wheel engagement and disengagement. The clutch mechanism of the self-propelled device does not require control components, thus improving the reliability of the self-propelled garden machinery device and garden machinery.

Description

Technical Field

[0001] This invention relates to the field of garden tool technology, and in particular to a self-propelled garden machinery and garden machinery. Background Technology

[0002] Existing garden machinery includes lawnmowers, rakes, snowplows, etc., but most garden machinery is relatively heavy. To make it more convenient to use, self-propelled units are added to garden machinery to reduce the burden on users when pushing lawnmowers. However, the self-propelled units of garden machinery can only provide driving force to the garden machinery, and their clutch function is complex. When the forward speed of the garden machinery is greater than the driving speed, the drive motor in the self-propelled unit will be pushed back, causing wear and tear on the self-propelled unit. Some existing garden machinery self-propelled units integrate automatic clutches in the transmission device, but traditional automatic clutches require control components, such as shift forks. Once the control components fail, the automatic clutch will also fail, resulting in low reliability. Summary of the Invention

[0003] The present invention aims to overcome the problems in the prior art and provide a self-propelled garden machinery and garden machinery, which realizes automatic clutch engagement and disengagement of the idler wheel, and the clutch mechanism of the self-propelled machine does not require control components, thereby improving the reliability of the self-propelled garden machinery and garden machinery.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A self-propelled garden machinery, including a housing,

[0006] A transmission mechanism is provided inside the housing. The transmission mechanism includes a driving wheel, a driven wheel, and an idler wheel clutch assembly. The idler wheel clutch assembly includes an idler wheel, which meshes with the driving wheel. The idler wheel is slidably disposed on the housing to realize the engagement and disengagement of the idler wheel and the driven wheel.

[0007] An electric motor is used to drive the drive wheel to rotate, thereby causing the idler wheel to slide on the housing.

[0008] In this technical solution, the driving wheel meshes with the idler wheel. The rotation of the driving wheel drives the idler wheel to slide on the housing until it meshes with the driven wheel. During this process, the engagement and disengagement of the idler wheel and the driven wheel are achieved by changing the position of the idler wheel, thereby controlling the transmission mechanism to transmit and interrupt the power to the motor. No control components need to be set on the idler wheel clutch assembly, which is simple in structure and highly reliable.

[0009] Preferably, the idler wheel clutch assembly further includes an idler wheel shaft and a slider. The idler wheel shaft passes through the slider and the idler wheel to connect the slider and the idler wheel. The housing is provided with a sliding groove, which is configured as an arc structure concentric with the drive wheel. The slider is slidably disposed on the sliding groove to control the sliding trajectory of the idler wheel.

[0010] The slider and the groove guide the sliding of the idler wheel on the housing. The groove is designed as an arc-shaped structure with the drive wheel as the concentric axis to ensure that the idler wheel is always engaged with the drive wheel, which makes it easy for the drive wheel to drive the idler wheel to move and ensures the reliability of the self-propelled device.

[0011] Preferably, the idler wheel and the idler wheel shaft are closely fitted so that the idler wheel drives the idler wheel shaft to rotate synchronously. An elastic element is provided on the side wall of the slide groove. The bottom of the idler wheel shaft passes through the slider. In the clutch state, the elastic element contacts the idler wheel shaft to overcome the frictional resistance between the slider and the housing.

[0012] The idler wheel meshes with the driving wheel. When the motor drives the driving wheel to rotate clockwise, the idler wheel moves clockwise along the slide groove under the action of the driving wheel. At the same time, the idler wheel itself rotates counterclockwise around the axis of the idler wheel shaft. Since the idler wheel shaft and the idler wheel are tightly fitted, the idler wheel shaft and the idler wheel rotate synchronously, which makes the idler wheel shaft also rotate counterclockwise. This allows the friction between the idler wheel shaft and the elastic element to overcome the resistance between the slider and the machine housing, promoting the sliding of the idler wheel.

[0013] Preferably, the elastic element is provided with elastic protrusions.

[0014] The elastic protrusion limits the sliding of the idler wheel. When the self-propelled unit is activated, the drive wheel rotates clockwise, causing the idler wheel clutch assembly to move clockwise and pass over the elastic protrusion to engage with the driven wheel. After the idler wheel and driven wheel are fully engaged, the idler wheel shaft and the elastic element are in a non-contact state, avoiding friction during normal operation. The elastic protrusion helps prevent machine vibration, bumps, and other factors from causing accidental triggering of the idler wheel and driven wheel during clutch engagement, improving the reliability and stability of the idler wheel clutch assembly.

[0015] Preferably, the idler wheel is provided with sliders on both the upper and lower sides.

[0016] This setup helps ensure smooth sliding of the idler wheel.

[0017] Preferably, the driven wheel includes a left driven wheel and a right driven wheel, which are coaxially arranged. In the normal driving state of the motor, both the left and right driven wheels are engaged with the idler wheel.

[0018] This configuration allows the motor to drive both driven wheels simultaneously after startup. For some garden machinery with two wheels, this is beneficial for the self-propelled machine to provide driving force to both wheels at the same time.

[0019] To achieve the purpose of the invention, the present invention provides another technical solution: a garden machinery, including the above-mentioned garden machinery self-propelled device, and further including wheels and a connecting assembly for connecting the wheels and the garden machinery self-propelled device. The connecting assembly includes a gear, a wheel axle, and a pin for connecting the gear and the wheel axle. The gear is connected to the wheel, the wheel axle is connected to the driven wheel, the end face of the gear is provided with a mounting groove for mounting the pin, the wheel axle is provided with a pin hole, and the pin hole is fitted onto the pin.

[0020] In this technical solution, a self-propelled device is installed inside the garden machinery to provide it with forward power. A connecting component is used to connect the self-propelled device and the wheels. The power of the driven wheel is transmitted to the wheel through the setting of the wheel axle and pin hole, so that the self-propelled device drives the wheel forward.

[0021] Preferably, the mounting groove is evenly distributed with ratchet teeth to enable unidirectional rotation of the gear, and one end of the pin abuts against the ratchet teeth to drive the gear to rotate.

[0022] When the self-propelled unit starts, the motor drives the drive wheel to rotate clockwise, which in turn drives the idler wheel to slide clockwise along the groove, allowing the idler wheel to mesh with the driven wheel and achieve transmission. At this time, the rotation of the driven wheel drives the axle to rotate, and the rotation of the axle drives the pin to rotate, which in turn drives the gear to rotate, thus enabling the garden machinery to move forward. When the forward speed of the garden machinery is greater than the forward speed driven by the motor under external force, although the gear and ratchet rotate in the same direction, because the speed of the gear is greater than the speed of the pin, the pin rotates in the opposite direction of the gear's rotation. At this time, the gear disengages from the rotation of the axle, allowing the wheel to move forward freely and preventing the force from being input into the motor in the opposite direction. When the external force disappears, the speed of the gear decreases until one end of the pin re-engages with the ratchet and drives the gear to rotate again, restoring normal output.

[0023] Preferably, the mounting groove is configured to cooperate with the pin structure to achieve synchronous rotation of the gear and the axle.

[0024] When the self-propelled machine starts, the motor drives the drive wheel to rotate clockwise, which in turn drives the idler wheel to slide clockwise along the groove, allowing the idler wheel to mesh with the driven wheel to achieve transmission. The driven wheel drives the main wheel to rotate through the connecting assembly. When the forward speed of the garden machinery is greater than the forward speed driven by the motor under external force, the gears on the wheel and the axle rotate synchronously. Since the axle connects the gears and the driven wheel, the rotation speed of the driven wheel is also greater than the speed driven by the motor. At this time, under the meshing action of the driven wheel, the idler wheel is driven to slide counterclockwise and pass over the elastic protrusion on the elastic element, causing the idler wheel to separate from the driven wheel, interrupting the power output, and preventing the force from being input to the motor in the opposite direction. When the whole machine is abnormally powered off, it can be unlocked by pushing the machine forward by hand, which can disengage the idler wheel from the driven wheel and realize the independent rotation of the left and right wheels.

[0025] Preferably, the wheel axle includes a left wheel axle and a right wheel axle, the driven wheel includes a left driven wheel and a right driven wheel, the left wheel axle is connected to the left driven wheel, the right wheel axle is connected to the right driven wheel, a short shaft is provided between the left wheel axle and the right wheel axle, and the left wheel axle and the right wheel axle are connected by the short shaft to realize independent movement between the left wheel axle and the right wheel axle.

[0026] This configuration allows the self-propelled vehicle to drive both wheels simultaneously. Furthermore, since the left and right axles are connected by a short axle support, it is beneficial to achieve independent movement between the two axles. For example, when there is no power, the left and right axles can rotate independently and flexibly in both directions.

[0027] Therefore, the present invention has the following beneficial effects:

[0028] (1) The idler wheel is engaged or disengaged by changing its position, without the need for any control components on the idler wheel clutch assembly. The structure is simple and highly reliable.

[0029] (2) The slider and the groove guide the sliding of the idler wheel on the housing. The groove is set as an arc-shaped structure with the same axis as the drive wheel to ensure that the idler wheel is always engaged with the drive wheel, which makes it easy for the drive wheel to drive the idler wheel to move and ensures the reliability of the self-propelled device.

[0030] (3) The idler shaft is tightly fitted to the idler wheel and loosely fitted to the slider. Through the contact between the idler shaft and the elastic element, the frictional resistance between the slider and the housing is overcome, and the sliding of the idler wheel is promoted.

[0031] (4) The elastic protrusions limit the sliding of the idler wheel, which helps to prevent the idler wheel and driven wheel from being accidentally triggered by factors such as machine vibration and bumps when the clutch is engaged, thereby improving the reliability and stability of the idler wheel clutch assembly.

[0032] (5) By setting sliders on both the upper and lower sides of the idler wheel, it is beneficial to ensure the smooth sliding of the idler wheel;

[0033] (6) By setting ratchet on the side wall of the gear mounting slot, the gear can rotate in one direction. The gear can rotate in one direction and cooperate with the self-propelled vehicle so that when the forward speed of the garden machinery is greater than the forward speed driven by the motor under the external force, the gear can rotate independently from the wheel axle, so that the wheels of the garden machinery can move forward freely, while avoiding the reverse input of the force to the motor.

[0034] (7) By engaging the gear mounting slot with the pin shaft, the gear and the driven wheel rotate synchronously. When the forward speed of the garden machinery is greater than the forward speed driven by the motor under the external force, the meshing action of the driven wheel drives the idler wheel to slide in the counterclockwise direction and pass over the elastic protrusion on the elastic element, so that the idler wheel separates from the driven wheel, interrupts the power output, and avoids the force being input to the motor in the opposite direction.

[0035] (8) The left and right driven wheels are coaxially arranged to enable the self-propelled device to drive the two wheels simultaneously. The left and right wheel axles are connected by a short shaft support, which is conducive to the independent movement between the two wheel axles. For example, when there is no power, the left and right wheel axles can rotate independently and flexibly in both directions. Attached Figure Description

[0036] Figure 1 This is an exploded structural diagram of a self-propelled garden machinery device.

[0037] Figure 2 This is a cross-sectional view of a self-propelled garden machinery unit;

[0038] Figure 3 yes Figure 2 Enlarged view of part A;

[0039] Figure 4 This is a schematic diagram of the self-propelled device when it is in the off state;

[0040] Figure 5 This is a schematic diagram of the self-propelled vehicle when it is in the start-up state;

[0041] Figure 6 This is a structural diagram of garden machinery;

[0042] Figure 7 This is an exploded structural diagram of the left wheel and connecting assembly in the first embodiment of the garden machinery;

[0043] Figure 8 This is an exploded structural diagram of the right wheel and connecting assembly in the first embodiment of the garden machinery;

[0044] Figure 9 This is a schematic diagram of the connecting components when the self-propelled vehicle is operating normally;

[0045] Figure 10 This is a schematic diagram of the connecting components when the forward speed of the garden machinery is greater than the motor speed;

[0046] Figure 11 This is an exploded structural diagram of the wheels and connecting components in the second embodiment of the garden machinery;

[0047] In the diagram: 1. Self-propelled mechanism; 2. Drive wheel; 3. Housing; 301. Slide groove; 3011. First slide rail; 3012. Second slide rail; 4. Idler wheel clutch assembly; 401. Idler wheel; 402. Idler wheel shaft; 403. Slider; 5. Driven wheel; 501. Left driven wheel; 502. Right driven wheel; 6. Elastic element; 601. Elastic protrusion; 7. Wheel shaft; 701. Left wheel shaft; 702. Right wheel shaft; 8. Gear; 801. Mounting groove; 802. Ratchet; 8021. Left ratchet; 8022. Right ratchet; 803. Left gear; 804. Right gear; 9. Pin; 10. Cylindrical pin; 11. Wheel; 12. Body; 13. Short shaft. Detailed Implementation

[0048] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0049] like Figure 1 , Figure 2 In the illustrated embodiment, a self-propelled garden machinery device includes a housing 3, a transmission mechanism, and a motor. Both the transmission mechanism and the motor are mounted on the housing 3. The transmission mechanism includes a driving wheel 2, a driven wheel, and an idler wheel clutch assembly 4. The idler wheel clutch assembly 4 includes an idler wheel 401, which transmits power from the driving wheel 2 to the driven wheel 5, thereby realizing the transmission of the transmission assembly. The idler wheel 401 is slidably mounted on the housing 3, and engagement and disengagement between the idler wheel 401 and the driven wheel 5 are achieved by changing the position of the idler wheel 401.

[0050] To enable the idler wheel 401 to slide, the idler wheel clutch assembly 4 also includes an idler wheel shaft 402 and a slider 403. A groove 301 is provided on the housing 3, and the slider 403 is slidably disposed in the groove 301. The groove 301 and the slider 403 guide the sliding of the idler wheel 401. The groove 301 is set as an arc structure with the axis of the drive wheel 2 as the center, that is, the groove 301 is located in the arc structure of the concentric axis of the drive wheel 2. This ensures that the idler wheel 401 is always engaged with the drive wheel 2 during the sliding process, and at the same time, it is beneficial for the drive wheel 2 to drive the idler wheel 401 to slide.

[0051] In one embodiment of this application, to ensure the connection between the idler wheel 401 and the slider 403, the idler wheel shaft 402 passes through the slider 403 and the idler wheel 401 to achieve the connection between the idler wheel 401 and the slider 403. The idler wheel shaft 402 is tightly fitted with the idler wheel 401 to achieve synchronous rotation of the idler wheel 401 and the idler wheel shaft 402. The slider 403 is loosely fitted with the idler wheel shaft 402 so that the idler wheel 401 drives the slider 403 to move but does not drive the slider 403 to rotate.

[0052] In one embodiment of this application, the sidewall of the slide groove 301 is provided with an elastic element 6. The bottom of the idler wheel shaft 402 passes through the slider 403 and cooperates with the elastic element 6. When the idler wheel is in the engaged / disengaged state, the idler wheel shaft 402 contacts the elastic element, providing friction for the movement of the idler wheel engagement / disengagement assembly to overcome the frictional resistance between the slider 403 and the housing 3, which is beneficial for the idler wheel 401 to slide on the housing 3. After the idler wheel and the driven wheel are fully engaged, the idler wheel separates from the elastic element, avoiding friction during normal operation. In addition, an elastic protrusion 601 is provided on the elastic element 6, which limits the sliding of the slider 403.

[0053] Furthermore, such as Figure 3 As shown, in order to avoid interference with the slider 403 caused by the installation of the elastic element 6, the slide groove 301 includes a first slide 3011 and a second slide 3012. The width of the first slide 3011 is greater than the width of the second slide 3012, thereby forming a stepped surface on the side wall of the slide groove 301. That is, the stepped surface is formed by the width difference between the first slide 3011 and the second slide 3012. In addition, the first slide rail 3011 is used to install the slider 403. The elastic element 6 is located on the side wall of the second slide rail 3012. The bottom of the idler shaft 402 passes through the slider 403 and is located in the second slide rail 3012 and cooperates with the elastic element 6. During normal operation, the idler shaft 402 does not contact the elastic element 6. When rotating in the opposite direction, when the slider 403 slides to the elastic protrusion 601, the idler shaft 402 begins to contact the elastic element 6. After sliding past the elastic protrusion 402, the idler shaft 402 and the elastic element 6 remain in contact. The contact between the idler shaft 402 and the elastic element 6 provides friction for the movement of the idler clutch assembly to overcome the resistance between the slider 403 and the housing 3.

[0054] In another embodiment of this application, to ensure the stability of the sliding process of the idler wheel 401, sliders 403 are provided on both sides of the idler wheel 401. The idler wheel shaft 402 passes through the sliders 403, the idler wheel 401 and the sliders 403 on the other side of the idler wheel 401 in sequence to realize the connection between the idler wheel 401 and the sliders 403. The sliders 403 are provided with mounting holes for mounting the idler wheel shaft 402. The sliders 403 are sleeved on the outside of the idler wheel shaft 402 through the mounting holes. The mounting holes and the idler wheel shaft 402 are clearance-fitted to realize the loose fit between the sliders 403 and the idler wheel shaft 402.

[0055] like Figure 4 , Figure 5As shown, in one embodiment of this application, the working process of the self-propelled device 1 is as follows: After the self-propelled device 1 is started, the motor drives the drive wheel 2 to rotate clockwise. The idler wheel 401 is tightly engaged with the idler wheel shaft 402, while the idler wheel shaft 402 is loosely engaged with the slider 403. The idler wheel shaft 402 is in contact with the elastic element 6. Under the action of the drive wheel 2, the elastic element 6 exerts a force on the idler wheel shaft 402 to overcome the friction between the slider 403 and the housing 3. The idler wheel clutch assembly 4 slides clockwise along the slide groove 301 and passes over the elastic protrusion 601 to engage with the driven wheel. At this time, the idler wheel shaft 402 is separated from the elastic element 6 and is in a non-contact state, realizing power transmission. After the self-propelled device is turned off, the motor is controlled to reverse, causing the idler wheel clutch assembly 4 to move counterclockwise along the slide groove 301 and pass over the elastic protrusion 601, thereby interrupting the power transmission. In this embodiment, the motor reversal time is controlled to be 1-5 seconds.

[0056] In some embodiments, the driven wheel 5 includes a left driven wheel 501 and a right driven wheel 502. The left driven wheel 501 and the right driven wheel 502 are arranged concentrically. When the self-propelled vehicle is in the starting state, both the left driven wheel 501 and the right driven wheel 502 are engaged with the idler wheel 401, so that the driving wheel 2 and the idler wheel 401 can transmit the power of the motor to the left driven wheel 501 and the right driven wheel 502.

[0057] like Figure 6 As shown, another embodiment of this application provides a garden machine, including a body 12, wheels 11 for propelling the body 12 forward, and a self-propelled device as described above. It also includes a connecting assembly for connecting the wheels 11 and the self-propelled device. The connecting assembly includes a gear 8, an axle 7, and a pin 9 for connecting the gear 8 and the axle 7. The axle 7 connects to a driven wheel on the self-propelled device, and the gear connects to the wheels 11. The axle 7 has a pin hole for mounting the pin 9. The axle 7 is fitted onto the pin through the pin hole. A mounting groove 801 is provided on the end face of the gear 8. The bottom of the mounting groove 801 has an axle hole. The axle hole radially limits the axle 7, and the mounting groove 801 is used to mount the pin 9, thereby achieving axial limiting of the axle 7 and causing the axle 7 to drive the gear 8 to rotate, thus driving the wheels 11 to rotate.

[0058] In addition, to achieve the connection between the axle 7 and the driven wheel 5, a cylindrical pin 10 is provided at the end of the axle that connects to the driven wheel. The cylindrical pin 10 passes radially through the axle and is fixed on the end face of the driven wheel 5, thereby achieving synchronous rotation of the driven wheel and the axle.

[0059] like Figure 7 or Figure 8As shown, in one embodiment of this application, the gear 8 is configured as a one-way gear, and a ratchet 802 for realizing one-way rotation of the gear is provided on the side wall of the mounting groove 801. The ratchet 802 includes an inclined surface and an abutment surface. In addition, in this embodiment, the pin 9 is clearance-fitted with the pin hole, that is, the pin 9 is loosely fitted with the pin hole, so that the pin can slide within the pin hole.

[0060] In this embodiment, the working process of the garden machinery is as follows: When the self-propelled vehicle starts, the motor drives the drive wheel 2 to rotate clockwise. The elastic element contacts the idler wheel shaft. The elastic element 6 exerts a force on the idler wheel shaft 402 to overcome the friction between the slider 403 and the housing 3, thereby driving the idler wheel 401 to slide clockwise along the slide groove 301, so that the idler wheel 401 meshes with the driven wheel to realize transmission. To avoid friction during normal operation, after the idler wheel and the driven wheel are fully engaged, the idler wheel shaft 402 and the elastic element 6 are in a non-contact state. At this time, the rotation of the driven wheel drives the wheel shaft to rotate, and the rotation of the wheel shaft drives the pin shaft to rotate. At this time, one end of the pin shaft abuts against the abutment surface of the ratchet 802, thereby driving the wheel shaft to rotate the gear 8, realizing the forward movement of the self-propelled garden machinery; when the forward speed of the garden machinery is greater than the forward speed driven by the motor under the external force (such as when going downhill or turning), such as Figure 9 , Figure 10 As shown, although the gear and pin rotate in the same direction, the gear's rotational speed is greater than that of the pin 9. The pin 9 rotates relative to the gear in the opposite direction, causing the gear to disengage from the axle and allowing the wheel 11 to move forward freely. This avoids reverse force input to the motor. To ensure smooth rotation of the pin within the gear mounting slot 801, the pin is fitted with a clearance fit in the pin hole, allowing it to slide within the hole. Only one end of the pin is always in contact with the ratchet 802. When the pin contacts the inclined surface of the ratchet 802, the inclined surface pushes the pin to slide within the pin hole, preventing it from obstructing the rotation of the gear 8. When the external force disappears, the gear speed decreases until one end of the pin re-engages with the ratchet 802, causing the gear to rotate again and restoring normal output.

[0061] like Figure 11As shown, in another embodiment of this application, the mounting groove 801 is configured to cooperate with the pin shaft. The pin shaft cooperates with the mounting groove 801 to drive the gear and the axle to rotate synchronously. In this embodiment, the working process of the garden machinery is as follows: When the self-propelled machine is started, the motor drives the driving wheel 2 to rotate clockwise, thereby driving the idler wheel 401 to slide clockwise along the slide groove 301, thereby driving the idler wheel 401 to mesh with the driven wheel to achieve transmission. The driven wheel drives the wheel 11 to rotate. When the forward speed of the garden machinery is greater than the forward speed driven by the motor under the external force (such as when going downhill or turning), since the gear on the wheel 11 rotates synchronously with the axle, and the axle connects the gear and the driven wheel, the rotation speed of the driven wheel is also greater than the speed when driven by the motor. At this time, under the meshing action of the driven wheel 5, the idler wheel 401 is driven to slide counterclockwise and pass over the elastic protrusion 601 on the elastic element 6, so that the idler wheel 401 separates from the driven wheel, interrupts the power output, and avoids the force being input to the motor in the opposite direction. Furthermore, in this embodiment, when the machine experiences an abnormal power outage or the battery pack is removed, an external force drives the wheel forward, and the wheel transmits power in the reverse direction to the gear. The gear drives the driven wheel to rotate, causing the idler wheel 401 to slide counterclockwise and pass over the elastic protrusion 601 to disengage from the driven wheel, thus realizing the engagement and disengagement of the idler wheel 401.

[0062] Furthermore, in some embodiments, wheel 11 includes a left wheel and a right wheel, and the self-propelled device drives both the left and right wheels simultaneously. Gears include a left gear 803 and a right gear 804. Driven wheels include a left driven wheel 501 and a right driven wheel 502. Axles include a left axle 701 and a right axle 702. The left axle 701 connects the left gear 803 and the left driven wheel 501, and the right axle 702 connects the right gear 804 and the right driven wheel 502. The left axle 701 is connected to the left gear by a pin 9, and the right axle 702 is also connected to the right gear by a pin 9. The left axle 701 and the right axle 702 are arranged and connected by a short shaft 13. The connection of the short shaft 13 allows the left axle 701 and the right axle 702 to move independently, realizing independent and flexible bidirectional movement of the left axle 701 and the right axle 702 when there is no power.

[0063] When the left gear 803 and the right gear 804 are unidirectional gears, that is, the mounting groove 801 of the left gear 803 is provided with a number of left ratchet teeth 8021 and the mounting groove 801 of the right gear 804 is provided with a number of right ratchet teeth 8022. When the forward speed of any wheel 11 is greater than the speed when driven by the motor, the setting of the left / right ratchet teeth realizes the free forward movement of the gears.

[0064] When the mounting slots 801 of the left and right gears engage with the pins, i.e., when the gears and axles rotate synchronously, if the forward speed of any one of the wheels 11 is greater than the speed driven by the motor, the idler wheel 401 will disengage from the driven wheel, interrupting the power output. For example, if the forward speed of the left wheel is greater than the speed driven by the motor, the left driven wheel 501 will drive the idler wheel 401 to slide counterclockwise and pass over the elastic protrusion 601, interrupting the power transmission and preventing the force from being input to the motor in the opposite direction. Similarly, if the forward speed of the right wheel is greater than the speed driven by the motor, it will also drive the idler wheel 401 to separate from the driven wheel, thereby interrupting the power transmission.

[0065] In addition, the garden machinery in this application can be a lawn mower, a raker, a snowplow, or a rotary tiller, etc.

[0066] It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the above description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, various other corresponding changes and deformations can be made based on the technical solutions and concepts described above, and all such changes and deformations should fall within the protection scope of the claims of this invention.

Claims

1. A self-propelled garden machinery device, characterized in that, include chassis, A transmission mechanism is provided inside the housing. The transmission mechanism includes a driving wheel, a driven wheel, and an idler wheel clutch assembly. The idler wheel clutch assembly includes an idler wheel, which meshes with the driving wheel. The idler wheel is slidably disposed on the housing to realize the engagement and disengagement of the idler wheel and the driven wheel. The motor drives the drive wheel to rotate, thereby causing the idler wheel to slide on the housing. The idler wheel clutch assembly also includes an idler wheel shaft and a slider. The idler wheel shaft passes through the slider and the idler wheel to connect the slider and the idler wheel. The housing is provided with a sliding groove, which is an arc structure with a concentric axis of the drive wheel. The slider is slidably disposed on the sliding groove to control the sliding trajectory of the idler wheel. The idler wheel and the idler wheel shaft are tightly engaged so that the idler wheel drives the idler wheel shaft to rotate synchronously. An elastic element is provided on the side wall of the sliding groove, and the bottom of the idler wheel shaft passes through the slider and engages with the elastic element.

2. The self-propelled garden machinery according to claim 1, characterized in that, The bottom of the idler shaft passes through the slider. In the clutch state, the elastic element contacts the idler shaft to overcome the frictional resistance between the slider and the housing.

3. A self-propelled garden machinery device according to claim 2, characterized in that, The elastic element is provided with elastic protrusions.

4. A self-propelled garden machinery device according to claim 1, characterized in that, The idler wheel has sliders on both its upper and lower sides.

5. A self-propelled garden machinery device according to claim 1, characterized in that, The driven wheel includes a left driven wheel and a right driven wheel, which are coaxially arranged. In the normal driving state of the motor, both the left and right driven wheels are engaged with the idler wheel.

6. A type of garden machinery, characterized in that, The garden machinery self-propelled device according to any one of claims 1-5 further includes wheels and a connecting assembly for connecting the wheels and the garden machinery self-propelled device. The connecting assembly includes a gear, an axle, and a pin for connecting the gear and the axle. The gear is connected to the wheel, the axle is connected to the driven wheel, the end face of the gear is provided with a mounting groove for mounting the pin, the axle is provided with a pin hole, and the pin hole is fitted onto the pin.

7. A garden machinery according to claim 6, characterized in that, The mounting groove is evenly distributed with ratchet teeth to enable unidirectional rotation of the gear, and one end of the pin abuts against the ratchet teeth to drive the gear to rotate.

8. A garden machinery according to claim 6, characterized in that, The mounting groove is designed to cooperate with the pin structure to achieve synchronous rotation of the gear and the axle.

9. A garden machinery according to claim 6, characterized in that, The wheel axle includes a left wheel axle and a right wheel axle, and the driven wheel includes a left driven wheel and a right driven wheel. The left wheel axle is connected to the left driven wheel, and the right wheel axle is connected to the right driven wheel. A short shaft is provided between the left wheel axle and the right wheel axle. The left wheel axle and the right wheel axle are connected by the short shaft to realize independent movement between the left wheel axle and the right wheel axle.

Images