Garden tool brake device and garden tool

Abstract

The application discloses a garden tool brake device and a garden tool, and solves various defects of the existing garden tool brake device. The garden tool brake device comprises a first rotating part, a second rotating part, an elastic part and a brake pad, the second rotating part is arranged on a main shaft in a floating manner, one of the first rotating part and the second rotating part rotates synchronously with the main shaft, and the other one can rotate relative to the main shaft; one of the two rotating parts is provided with a sliding groove extending in the circumferential direction, and the other one is provided with a transmission part; the sliding groove has an inclined bottom surface in the extending direction, and at least part of the transmission part is slidably arranged in the sliding groove and slides on the bottom surface so that the second rotating part approaches or moves away from the shell; when the second rotating part approaches the shell, the second rotating part is in contact with the shell through the brake pad. In addition, the application further provides a garden tool comprising the garden tool brake device.

Description

Technical Field

[0001] This invention relates to the field of garden tools, and in particular to a garden tool with an improved braking device. Background Technology

[0002] Series motors are widely used in garden tools due to their advantages of high starting torque and easy speed adjustment, making them suitable for high-load, low-speed applications. Compared to other motors, they are simpler in design, have lower manufacturing costs, and are relatively cheaper. This is especially true for garden tools that employ large working mechanisms such as augers or require high torque, rotating working mechanisms, such as lawnmowers and snowplows.

[0003] However, series-wound motors require mechanical braking. Existing garden tools that use augers, such as lawnmowers and sweepers, commonly use braking methods such as belt tensioning, centrifugal friction rings, and ratchet brakes. However, belt tensioning brakes are inefficient and have short component lifespans; centrifugal friction rings are complex in structure, expensive, and have long braking times; ratchet brakes have poor versatility due to insufficient drive shaft strength and are more suitable for gear transmissions, and the debris generated during ratchet brake friction can remain in the gearbox, affecting the braking effect.

[0004] Therefore, there is an urgent need in the field for a braking device that is highly efficient, simple in structure, strong, and versatile, in order to overcome the shortcomings of the above-mentioned solutions. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art by proposing a braking device for garden tools, so as to solve the various deficiencies in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a garden tool braking device, comprising:

[0007] First rotating component;

[0008] The second rotating component is disposed between the housing of the garden tool and the first rotating component, and can move along the main shaft;

[0009] An elastic element, pre-tightened between the housing of the garden tool and the second rotating component, allows the second rotating component to float relative to the main shaft; and,

[0010] Brake pads are disposed between the housing of the garden tool and the second rotating component;

[0011] One of the first rotating component and the second rotating component rotates synchronously with the main shaft, and the other of the two components can rotate relative to the main shaft;

[0012] One of the first rotating component and the second rotating component is provided with a circumferentially extending groove, and the other of the two is provided with a transmission part;

[0013] The slide has a bottom surface that is inclined along the extension direction, and at least a portion of the transmission part is slidably placed in the slide and slides on the bottom surface so that the second rotating part approaches or moves away from the housing; when the second rotating part approaches the housing, the second rotating part contacts the housing through a brake pad.

[0014] Preferably, the transmission part has a mating surface that corresponds to the bottom surface.

[0015] Preferably, the mating surface is formed with at least one raised rib.

[0016] Preferably, the angle at which the groove extends circumferentially is less than 120°.

[0017] Preferably, the number of slides is three, the number of transmission parts corresponds to the number of slides, and the slides are symmetrically distributed circumferentially on one of the first rotating component and the second rotating component.

[0018] Preferably, the first or second rotating component is driven to rotate by a motor.

[0019] Preferably, the first rotating component is provided with a rotating shaft portion extending along the main shaft axis. The main shaft is detachably fixedly connected to the first rotating component through the rotating shaft portion. The second rotating component is rotatably sleeved on the rotating shaft portion, and the motor drives the second rotating component to rotate, thereby transmitting power to the first rotating component.

[0020] Preferably, the second rotating component is provided with a rotating shaft portion extending along the axial direction of the main shaft. The second rotating component rotates synchronously with the main shaft through the rotating shaft portion, and the main shaft is slidably connected to the rotating shaft portion. The motor drives the first rotating component to rotate, thereby transmitting power to the second rotating component.

[0021] Preferably, the brake pads are detachably mounted on the second rotating component or housing.

[0022] The present invention also proposes a garden tool, including a housing, a motor, and a spindle, wherein a working component is fixed on the spindle, and further includes a garden tool braking device as described in any of the above technical solutions.

[0023] By adopting the above technical solution, the present invention has the following beneficial effects.

[0024] 1. This invention provides a braking device for garden tools, comprising a first rotating component, a second rotating component, an elastic element, and a brake. One of the first and second rotating components rotates synchronously with the main shaft, while the other rotates relative to the main shaft. A circumferentially extending groove and a transmission part are provided between the first and second rotating components. The first and second rotating components, through the cooperation of the transmission part and the groove, achieve automatic braking when the motor is turned off. The cooperation of the transmission part and the groove enables the motor to be started, transmitting power to the main shaft through the first and second rotating components; when the motor is turned off, the second rotating component approaches the housing to achieve braking. One device can achieve both transmission and braking, eliminating the need for additional braking components. With fewer parts, it effectively reduces manufacturing and subsequent maintenance costs. Secondly, friction between the transmission part and the groove may generate debris, but this debris will be thrown outwards as the first or second rotating component rotates, making it unlikely to fall between the first / second rotating component and the main shaft, thus not affecting the braking mechanism. Thirdly, the transmission part is independently set relative to the main shaft, allowing it to have a sufficient diameter for adequate load-bearing capacity, making it less prone to deformation and damage during use. Fourth, the cooperation between the transmission part and the slide does not affect the transmission between the motor and the first rotating part or the second rotating part. Therefore, the device is applicable to various transmission methods such as gears, belts, and chains, and has good versatility.

[0025] 2. By the engagement of the inclined surfaces between the mating surfaces and the bottom surface, the speed difference between the first rotating component and the second rotating component can generate thrust, thereby driving the transmission part to move.

[0026] 3. By setting at least one raised rib on the mating surface, the friction between the mating surface and the bottom surface is reduced, making it easier for the transmission part to slide in the groove, thereby increasing the transmission and braking effect.

[0027] 4. By limiting the angle of the circumferential extension of the slide, the transmission unit can achieve transmission or braking by running a short distance in the slide, which speeds up the braking response time of the braking device and improves the braking efficiency of the braking device.

[0028] 5. By setting three slides and transmission parts in a circumferential distribution, the braking load of the transmission part can be distributed, increasing the service life of the transmission part and improving the braking stability of the braking device. Furthermore, the three slides and transmission parts can stably determine the shaft center, thereby increasing the stability of the first rotating part and the second rotating part that are not fixed to the main shaft when rotating, and reducing the occurrence of shaking, collisions, etc. during braking.

[0029] 6. The rotating shaft is detachably fixed to the main shaft, which facilitates subsequent maintenance; and the second rotating component is rotatably sleeved on the rotating shaft, which can rotate stably along the rotating shaft, thus improving the working and transmission efficiency of the second transmission unit.

[0030] 7. By rotating the shaft and slidingly connecting it with the main shaft, the second transmission part floats relative to the main shaft. The first rotating part performs transmission outside the second transmission part. The first rotating part is a driven wheel that rotates with the motor. The driven wheel is located on the outside, which can increase the distance between the garden tool housing and the driven wheel, reduce interference between the driven wheel and the housing, and enhance the heat dissipation effect of the driven wheel.

[0031] 8. The brake pads are detachably mounted on the second rotating component or the housing, which facilitates the inspection of the brake pads during use and subsequent maintenance or replacement.

[0032] 9. The garden tool proposed in this invention, by employing a garden tool braking device as described in any of the above technical solutions, possesses all the technical effects of the aforementioned garden tool braking device. Attached Figure Description

[0033] Figure 1 This is an exploded view of a garden tool braking device according to an embodiment of the present invention;

[0034] Figure 2 This is a partial cross-sectional view of a garden tool braking device according to an embodiment of the present invention;

[0035] Figure 3 This is a cross-sectional view of the first rotating component and the second rotating component in a garden tool braking device according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of a garden tool braking device according to one embodiment of the present invention.

[0037] Figure label:

[0038] 100. Housing; 110. Spindle;

[0039] 201. First rotating component; 202. Second rotating component; 203. Elastic element; 204. Brake pad; 210. Slide groove; 211. Bottom surface; 212. First end face; 213. Second end face; 220. Transmission part; 221. Mating surface; 230. Rotating shaft part. Detailed Implementation

[0040] The present invention proposes a braking device for garden tools, comprising:

[0041] First rotating component 201;

[0042] The second rotating component 202 is disposed between the housing 100 of the garden tool and the first rotating component 201, and can move along the main shaft 110;

[0043] The elastic element 203 is pre-tightened between the garden tool housing 100 and the second rotating component 202 to allow the second rotating component 202 to float relative to the main shaft 110; and,

[0044] Brake pad 204 is disposed between the housing 100 of the garden tool and the second rotating component 202;

[0045] One of the first rotating component 201 and the second rotating component 202 rotates synchronously with the main shaft 110, and the other of the two can rotate relative to the main shaft 110;

[0046] One of the first rotating component 201 and the second rotating component 202 is provided with a circumferentially extending groove 210, and the other of the two is provided with a transmission part 220.

[0047] The slide 210 has a bottom surface 211 that is inclined in the extension direction. At least a portion of the transmission part 220 is slidably placed in the slide 210 and slides on the bottom surface 211 so that the second rotating part 202 approaches or moves away from the housing 100. When the second rotating part 202 approaches the housing 100, the second rotating part 202 contacts the housing 100 through the brake pad 204.

[0048] Through the cooperation of the transmission unit 220 and the slide 210, the motor is started, and the power is transmitted to the main shaft through the first rotating component 201 and the second rotating component 202. When the motor is turned off, the second rotating component 202 moves close to the housing 100 to achieve braking. One device can realize both transmission and braking, eliminating the need for additional braking components. With fewer parts, this effectively reduces manufacturing and subsequent maintenance costs. Secondly, while friction between the transmission unit 220 and the slide 210 may generate debris, this debris is thrown outwards as the first rotating component 201 or the second rotating component 202 rotates, making it unlikely to fall between the first rotating component 201, the second rotating component 202, and the main shaft, thus not affecting the braking mechanism. Thirdly, the transmission unit 220 is independently positioned relative to the main shaft, allowing it to have a sufficient diameter for adequate load-bearing capacity, making it less prone to deformation and damage during use. Fourth, the cooperation between the transmission part 220 and the slide 210 does not affect the transmission between the motor and the first rotating part 201 or the second rotating part 202. Therefore, the device is applicable to various transmission methods such as gears, belts, and chains, and has good versatility.

[0049] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" or "a number" means two or more, unless otherwise expressly defined.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0054] Example 1:

[0055] like Figures 1 to 3As shown in the embodiment of the present invention, a garden tool braking device includes a first rotating component 201, a second rotating component 202, an elastic element 203, and a brake pad 204. The first rotating component 201 is fixedly connected to the end of the main shaft 110. The second rotating component 202 is disposed between the garden tool housing 100 and the first rotating component 201, and the second rotating component 202 can move axially along the main shaft 110. A pre-tightened elastic element 203 is provided between the garden tool housing 100 and the second rotating component 202, so that the second rotating component 202 can float relative to the main shaft 110 and move closer to or away from the garden tool housing 100. A brake pad 204 is also provided between the garden tool housing 100 and the second rotating component 202. When the second rotating component 202 approaches the garden tool, the second rotating component 202 contacts the housing 100 through the brake pad 204, thereby achieving frictional braking.

[0056] The garden tool's main shaft 110 is equipped with a working mechanism for operation, such as a rotating auger.

[0057] Among them, the elastic element 203 is sleeved on the main shaft 110 to elastically support the second rotating component 202.

[0058] Brake pads 204 can be mounted on the housing 100 or the second rotating component 202. Preferably, in this embodiment, the brake pads 204 are detachably mounted on the housing 100 or the second rotating component 202 to facilitate inspection and subsequent maintenance or replacement during use. More preferably, three brake pads 204 are evenly distributed circumferentially on the housing 100 or the second rotating component 202 to achieve better braking force. Since the second rotating component 202 is floatingly connected to the main shaft 110, unilateral force during braking can cause the second rotating component 202 to deflect, potentially leading to vibration during braking, or causing compression between the second rotating component 202 and the main shaft 100, thus affecting the service life of both. By evenly distributing the brake pads 204 circumferentially, the second rotating component 202 can avoid vibration or compression with the main shaft 100 caused by unilateral force during braking. This ensures balanced circumferential force on the second rotating component 202 during braking, improving its circumferential stability and service life. It is understood that the number of brake pads 204 can be set to three or more to further balance the circumferential force on the second rotating component 202 during braking.

[0059] In some other embodiments, the brake pad 204 is detachably mounted on the housing 100 of the garden tool, and the braking surface is mounted on the second rotating component 202.

[0060] It is understandable that the position of the brake pad 204 will affect the braking effect. The brake pad 204 or the brake surface rotates with the second rotating component 202. The closer the brake pad 204 is to the axis of the main shaft 110, the slower the rotational linear velocity of the brake pad 204 or the contact position between the brake pad 204 and the brake surface, and thus the smaller the braking force generated by the friction between the brake pad 204 and the brake surface, and the weaker the braking effect. The farther the brake pad 204 is from the axis of the main shaft 110, the greater the rotational linear velocity of the brake pad 204 or the contact position between the brake pad 204 and the brake surface, and thus the greater the braking force generated by the friction between the brake pad 204 and the brake surface, and the stronger the braking effect.

[0061] To control the second rotating component 202 to move closer to or further away from the garden tool's housing 100 by starting and stopping the motor, the second rotating component 202 rotates along with the garden tool's motor. The second rotating component 202 has a circumferentially extending groove 210, and the first rotating component 201 has a transmission part 220. At least a portion of the transmission part 220 is slidably placed within the groove 210, which has an inclined bottom surface 211 on which the transmission part 220 can slide. When the motor rotates, it drives the second rotating component 202 to rotate, which in turn drives the groove 210 to rotate. The transmission part 220 slides along the bottom surface 211 to a deeper first end face 212 of the groove 210, where it abuts against the transmission part 220. The second rotating component 202 then transmits power to the first rotating component 201, causing the first rotating component 201 to rotate. The first rotating component 201 then drives the garden tool's main shaft 110 to rotate. When the motor stops, the motor and the second rotating component 202 lose power and have a faster tendency to stop. However, the auger of the garden tool has a larger mass and a slower tendency to stop. Therefore, the auger drives the main shaft 110 to continue rotating. The first rotating component 201 and the second rotating component 202 form a speed difference. The transmission part 220 thus slides along the bottom surface 211 toward the second end face 213 of the groove 210, which is shallower, with a movement in the opposite direction to the rotation. During the sliding process, the transmission part 220 pushes the second rotating component 202 closer to the housing 100 of the garden tool so that the brake pad 204 contacts the braking surface for friction braking.

[0062] The motor can be driven by a belt, gear, chain, or other transmission methods. In this embodiment, the preferred motor drives the second rotating component 202 to rotate via a belt; more preferably, a tensioning pulley is also used to increase the belt tension and improve the belt transmission efficiency.

[0063] Example 2:

[0064] like Figures 1 to 3As shown, in one embodiment of the present invention, based on the garden tool braking device described in the foregoing embodiments, a first rotating component 201 is provided with a circumferentially extending groove 210, and a second rotating component 202 is provided with a transmission part 220. At least a portion of the transmission part 220 is slidably placed within the groove 210. The groove 210 has an inclined bottom surface 211, and the transmission part 220 can slide on the bottom surface 211. When the motor rotates, the motor drives the second rotating component 202 to rotate, and the rotation of the second rotating component 202 drives the transmission part 220 to rotate. The transmission part 220 slides along the bottom surface 211 of the groove 210 to a first end face 212 with a greater depth in the groove 210. The first end face 212 abuts against the transmission part 220. The second rotating component 202 transmits power to the first rotating component 201, thereby driving the first rotating component 201 to rotate accordingly. The first rotating component 201 drives the main shaft 110 of the garden tool to rotate. When the motor stops, the motor and the second rotating component 202 lose power and have a faster tendency to stop. However, the auger of the garden tool has a larger mass and a slower tendency to stop. Therefore, the auger drives the main shaft 110 to continue rotating. The first rotating component 201 and the second rotating component 202 form a speed difference. The transmission part 220 thus slides along the bottom surface 211 toward the second end face 213 of the groove 210, which is shallower, with a movement in the opposite direction to the rotation. During the sliding process, the transmission part 220 pushes the second rotating component 202 closer to the housing 100 of the garden tool so that the brake pad 204 contacts the braking surface for friction braking.

[0065] Example 3:

[0066] like Figure 1 As shown, in one embodiment of the present invention, based on the garden tool braking device described in Embodiments 1 and 2 above, the first rotating component 201 is provided with a rotating shaft portion 230 extending axially toward the main shaft 110. The first rotating component 201 is detachably fixedly connected to the main shaft 110 through the rotating shaft portion 230. The main shaft 110 may have shapes such as splines, flat sections, or square grooves. Correspondingly, the rotating shaft portion 230 is provided with a groove adapted to the shape of the main shaft 110 so that the main shaft 110 is detachably connected to the first rotating component 201 axially through the rotating shaft portion 230, allowing the main shaft 110 and the first rotating component 201 to rotate together. The main shaft 110 is also provided with a pin hole or a threaded hole to allow the main shaft 110 to be detachably fixed to the first rotating component 201.

[0067] The second rotating component 202 is rotatably mounted on the rotating shaft 230, and the motor drives the second rotating component 202 to transmit power to the first rotating component 201. By setting the rotating shaft 230, the first rotating component 201 can be detachably and fixedly connected to the main shaft 110, which facilitates subsequent maintenance and ensures a stable connection. The first rotating component 201 can rotate stably with the main shaft 110 without axial movement. Furthermore, the second rotating component 202 is rotatably mounted on the rotating shaft 230, and the second rotating component 202 can rotate stably along the rotating shaft 230, thereby improving the working and transmission efficiency of the second transmission unit 220.

[0068] Example 4:

[0069] In one embodiment of the present invention, a garden tool braking device is proposed, which differs from the aforementioned embodiments one, two, and three in that the first rotating component 201 rotates with the rotation of the garden tool motor, the second rotating component 202 is provided with a circumferentially extending groove 210, and the first rotating component 201 is provided with a transmission part 220. At least a portion of the transmission part 220 is slidably placed in the groove 210, the groove 210 has an inclined bottom surface 211, and the transmission part 220 can slide on the bottom surface 211. When the motor rotates, the motor drives the first rotating component 201 to rotate, and the rotation of the first rotating component 201 drives the transmission part 220 to rotate. The transmission part 220 slides along the bottom surface 211 to a deeper first end face 212 in the groove 210, and the first end face 212 abuts against the transmission part 220. The first rotating component 201 transmits power to the second rotating component 202, thereby driving the first rotating component 201 to rotate. The second rotating component 202 drives the main shaft 110 of the garden tool to rotate. When the motor stops, the motor and the first rotating component 201 lose power and have a faster tendency to stop. However, the auger of the garden tool has a larger mass and a slower tendency to stop. Therefore, the auger drives the main shaft 110 to continue rotating. The first rotating component 201 and the second rotating component 202 form a speed difference. The transmission part 220 therefore slides along the bottom surface 211 towards the shallower second end face 213 in the slide groove 210 with a movement in the opposite direction to the rotation. During the sliding process, the transmission part 220 pushes the second rotating component 202 closer to the housing 100 of the garden tool so that the brake pad 204 contacts the braking surface for friction braking.

[0070] In some other embodiments, the first rotating component 201 may have a circumferentially extending groove 210, and the second rotating component 202 may have a transmission part 220, at least a portion of which is slidably disposed within the groove 210. The groove 210 has an inclined bottom surface 211, and the transmission part 220 may slide on the bottom surface 211. The specific working method has been described in the foregoing embodiments and will not be repeated here.

[0071] In a preferred embodiment, to allow the second rotating component 202 to float relative to the main shaft 110, the second rotating component 202 is provided with a rotating shaft portion 230 extending axially along the main shaft 110. The main shaft 110 may have shapes such as splines, flat sections, or square grooves. Correspondingly, the rotating shaft portion 230 is provided with a groove adapted to the shape of the main shaft 110, allowing the main shaft 110 to slide relative to the rotating shaft portion 230. The end of the main shaft 110 extends out of the rotating shaft portion 230 and connects to the first rotating component 201. The first rotating component 201 is confined to the end of the main shaft 110 so that it cannot move axially along the main shaft 110 but can rotate relative to the main shaft 110. The rotation of the motor drives the first rotating component 201 to rotate, thus transmitting power to the second rotating component 202.

[0072] Example 5:

[0073] like Figure 1 As shown, in one embodiment of the present invention, based on the garden tool braking device described in embodiments one, two, three, and four above, the transmission part 220 has a mating surface 221 adapted to the bottom surface 211. Specifically, the transmission part 220 can be a transmission pin, and the contact surface between the transmission pin and the bottom surface 211 of the slide groove 210 is an inclined surface. Through the mating of the inclined surfaces, the speed difference between the first rotating component 201 and the second rotating component 202 can generate a thrust, thereby driving the transmission part 220 to move.

[0074] Understandably, the tilt angle of the bottom surface 211 affects the braking effect. The speed difference between the first rotating component 201 and the second rotating component 202 generates a thrust, which in turn drives the transmission unit 220 to move. This thrust can be decomposed into a first thrust along the direction of the bottom surface 211 and a second thrust perpendicular to the direction of the bottom surface 211. The first thrust pushes the transmission unit 220 towards the first end face 212 or the second end face 213, while the second thrust presses the transmission unit 220 against the bottom surface 211, generating sliding friction when the two slide, thus affecting the sliding effect. The larger the tilt angle, the smaller the first thrust, and the greater the friction between the transmission unit 220 and the bottom surface 211, resulting in a weaker braking effect; the smaller the tilt angle, the greater the first thrust, and the smaller the friction between the transmission unit 220 and the bottom surface 211, resulting in a stronger braking effect. Meanwhile, the tilt angle of the bottom surface 211 also affects the travel of the brake pad 204. A larger tilt angle results in a longer travel of the brake pad 204, while a smaller tilt angle results in a shorter travel. If the travel of the brake pad 204 is too short, it can easily lead to excessive braking speed and incorrect braking due to foreign objects. Conversely, if the travel of the brake pad 204 is too long, it can easily lead to insufficient braking speed or failure to brake at all. Therefore, the bottom surface 211 needs to have a suitable tilt angle to achieve a good and appropriate braking effect. Preferably, in this embodiment, the tilt angle of the bottom surface 211 is between 5° and 60°. More preferably, the tilt angle of the bottom surface 211 is between 20° and 45°.

[0075] However, the contact area between the inclined surfaces is relatively large. After a period of use, the two inclined surfaces may become too smooth due to repeated friction, potentially increasing the friction between them. This could prevent the transmission part 220 from overcoming the friction and moving to the second end face 213 during braking, thus affecting the braking effect. In this preferred embodiment, the mating surface 221 is formed with raised ribs. These ribs can be one or more segments arranged in a ring on the mating surface 221, or one or more segments arranged along a direction perpendicular to the movement direction of the transmission part 220. By providing at least one raised rib on the mating surface 221, the friction between the mating surface 221 and the bottom surface 211 can be reduced, making it easier for the transmission part 220 to slide in the groove 210, thereby increasing the braking effect of the braking device. The raised ribs are arranged in a ring shape or in a strip shape perpendicular to the direction of movement of the transmission part 220 on the mating surface 221. This can prevent the raised ribs from sliding in a local position on the bottom surface 211, which would cause friction indentations to form on the bottom surface 211 due to long-term friction. If the raised ribs slide in the friction indentations, the contact area between the mating surface 221 and the bottom surface 211 will increase, which will increase the sliding friction and thus affect the braking effect.

[0076] In this preferred embodiment, the sidewall of the transmission part 220 is arc-shaped. The arc-shaped design can prevent the transmission part 220 from getting stuck in the slide groove 210 when it slides in the slide groove 210, and reduce the contact area between the transmission part 220 and the sidewall of the slide groove 210, thereby reducing the friction force when the transmission part 220 slides and improving the braking effect of the braking device.

[0077] Example 6:

[0078] like Figure 1 As shown, in one embodiment of the present invention, based on the garden tool braking device described in embodiments one, two, three, four, and five above, the angle of the circumferential extension of the slide groove 210 is less than 120°; preferably, the angle of the circumferential extension of the slide groove 210 is less than 90°; more preferably, the angle of the circumferential extension of the slide groove 210 is less than 75°. By limiting the circumferential extension of the slide groove 210 to a certain angle, the transmission part 220 can achieve transmission or braking through a short distance movement in the slide groove 210, thereby accelerating the braking response time of the braking device and improving the braking efficiency of the braking device.

[0079] In this preferred embodiment, the number of slide grooves 210 is three, and the number of transmission parts 220 corresponds to the number of slide grooves 210. The slide grooves 210 are symmetrically distributed circumferentially on one of the first rotating component 201 and the second rotating component 202. By setting three slide grooves 210 and transmission parts 220 and distributing them symmetrically circumferentially, the braking load of the transmission part 220 can be distributed, increasing the service life of the transmission part 220 and improving the braking stability of the braking device. Furthermore, the three slide grooves 210 and transmission parts 220 can determine a stable rotation axis, which can increase the stability of the first rotating component 201 and the second rotating component 202 that is not fixed to the main shaft 110 when rotating, reducing the occurrence of shaking, collisions, and other issues during braking.

[0080] In some other embodiments, the number of slides 210 and transmission parts 220 can be increased to further stabilize the rotation axis, reduce the braking load of the distributed braking device, and allow the braking load to be evenly distributed across multiple transmission parts 220. Accordingly, the angle at which the slides 210 extend circumferentially can be determined based on the number of slides 210.

[0081] Example 7:

[0082] Figure 4As shown, in one embodiment of the present invention, a garden tool braking device differs from the aforementioned embodiments one, two, three, four, five, and six in that both the first rotating component 201 and the second rotating component 202 are disposed within the housing 100. The second rotating component 202 is relatively closer to the housing 100 and is located between the housing 100 and the first rotating component 201. An elastic member 203 is provided between the second rotating component 202 and the housing 100, allowing the second rotating component 202 to float relative to the main shaft 110 and move closer to or further away from the housing 100. A sliding groove 210 is disposed on one of the first rotating component 201 and the second rotating component 202, and a transmission part 220 is disposed on the other. A motor can drive one of the first rotating component 201 and the second rotating component 202 to rotate, and through the other, transmit power to the main shaft 110 to drive the main shaft 110 to rotate. The specific working method has been described in the aforementioned embodiments and will not be repeated here.

[0083] Example 8:

[0084] In one embodiment of the present invention, a garden tool is provided, including a housing 100, a motor, and a spindle 110. A working component is fixed on the spindle 110. The garden tool adopts a garden tool braking device as described in any of the above embodiments. When the motor is started, the garden tool braking device drives the spindle 110 to rotate; when the motor stops, the brake pad 204 of the garden tool braking device contacts the braking surface for friction braking.

[0085] For example, a garden tool is a lawnmower, and a auger for mowing is installed on the main shaft 110 of the lawnmower.

[0086] For example, the garden tool is a snowplow, and a snowplow auger for snow removal is installed on the main shaft 110 of the snowplow.

[0087] Understandably, garden tools are not limited to lawnmowers and snowplows; garden tools can also be other garden tools with an auger working structure, such as harvesters and tillers.

[0088] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A braking device for garden tools, characterized in that, include: First rotating component; The second rotating component is disposed between the housing of the garden tool and the first rotating component, and can move along the main shaft; An elastic element is pre-tightened between the housing of the garden tool and the second rotating component to allow the second rotating component to float relative to the main shaft; and, Brake pads are disposed between the housing of the garden tool and the second rotating component; One of the first rotating component and the second rotating component rotates synchronously with the main shaft, and the other of the two components can rotate relative to the main shaft; One of the first rotating component and the second rotating component is provided with a circumferentially extending groove, and the other of the two is provided with a transmission part; The groove has a bottom surface that is inclined along the extension direction, and at least a portion of the transmission part is slidably placed in the groove and slides on the bottom surface so that the second rotating part moves closer to or away from the housing; When the second rotating component approaches the housing, the second rotating component contacts the housing via a brake pad; The transmission part has a mating surface that corresponds to the bottom surface.

2. The garden tool braking device as described in claim 1, characterized in that, The mating surface is formed with at least one rib.

3. A garden tool braking device as described in claim 1, characterized in that, The angle at which the circumferential groove extends is less than 120°.

4. A garden tool braking device as described in claim 3, characterized in that, The number of slides is three, and the number of transmission parts corresponds to the number of slides. The slides are symmetrically distributed circumferentially on one of the first rotating component and the second rotating component.

5. A garden tool braking device as described in claim 1, characterized in that, The first rotating component or the second rotating component is driven to rotate by a motor.

6. A garden tool braking device as described in claim 5, characterized in that, The first rotating component is provided with a rotating shaft portion extending along the main shaft axis. The main shaft is detachably fixedly connected to the first rotating component through the rotating shaft portion. The second rotating component is rotatably sleeved on the rotating shaft portion, and the motor drives the second rotating component to rotate, thereby transmitting power to the first rotating component.

7. A garden tool braking device as described in claim 5, characterized in that, The second rotating component is provided with a rotating shaft portion extending along the axial direction of the main shaft. The second rotating component rotates synchronously with the main shaft through the rotating shaft portion, and the main shaft is slidably connected to the rotating shaft portion. The motor drives the first rotating component to rotate, thereby transmitting power to the second rotating component.

8. A garden tool braking device as described in claim 1, characterized in that, The brake pads are detachably mounted on the second rotating component or housing.

9. A garden tool, comprising a housing, a motor, and a spindle, wherein a working component is fixed on the spindle, characterized in that, It also includes a garden tool braking device as described in any one of claims 1 to 8.

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