Garden tool brake device and garden tool

Abstract

The utility model discloses a gardening tool brake device which solves the problem that when an existing gardening tool brake device brakes, a brake pad and a shell or a second rotating component are prone to being locked. The gardening tool brake device comprises a first rotating component, a second rotating component and a first elastic piece pre-pressed between a shell and the second rotating component, and the second rotating component is arranged between the first rotating component and the shell. One of the first rotating component and the second rotating component is provided with a sliding groove with an inclined bottom, the other one of the first rotating component and the second rotating component is provided with a transmission part at least partially arranged in the sliding groove, the transmission part slides between the two ends of the sliding groove so that the second rotating component can be away from or close to the shell, and one of the second rotating component and the shell is provided with a brake pad. The side, away from the brake pad, of the friction plate is provided with an isolation piece, and the contact area of the isolation piece and the second rotating component or the shell is smaller than the cross sectional area of the friction plate in the axial direction.

Description

Technical Field

[0001] The utility model relates to the field of garden tools, in particular to a brake device for garden tools. Background Art

[0002] Garden tools adopting large working mechanisms such as augers, such as lawn mowers, snow blowers, etc., usually adopt series-wound motors to drive the operation of their working mechanisms.

[0003] The series-wound motor needs to be braked mechanically. In the prior art, for example, CN219840950U discloses a brake device for garden tools and a garden tool, which realizes transmission and automatic braking when the motor stops rotating through the cooperation of a first rotating member, a second rotating member and the housing of the garden tool.

[0004] However, in this technical solution, the brake pads directly rub against the surface of the housing or the second rotating member, resulting in easy seizure between the brake pads and the housing or the second rotating member when the garden tool brakes. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and propose a brake device for garden tools to solve the problem that seizure easily occurs between the brake pads and the housing or the second rotating member during braking.

[0006] To achieve the above technical objectives, a brake device for garden tools proposed by the utility model includes a first rotating member limited at one end of the main shaft of the garden tool, a second rotating member floating on the main shaft, and a first elastic member pre-pressed between the housing of the garden tool and the second rotating member. The second rotating member is arranged between the first rotating member and the housing. A circumferentially extending chute is provided on one of the first rotating member and the second rotating member, and one end of the bottom of the chute is inclined towards the other end. A transmission portion is provided on the other, and at least part of the transmission portion is placed in the chute, and the transmission portion slides between the two ends of the chute to make the second rotating member move away from or close to the housing. A brake pad is provided on one of the second rotating member and the housing, and a friction plate is floatingly provided on the other. The brake pad rubs against the friction plate to brake. An isolation member is provided on the side of the friction plate facing away from the brake pad, and the contact area between the isolation member and the second rotating member or the housing is smaller than the cross-sectional area of the friction plate in the axial direction.

[0007] Preferably, a guiding member is provided on the second rotating member, or a guiding member is provided on the housing; the guiding member guides the floating movement direction of the friction plate.

[0008] Preferably, the friction plate is floatingly installed on the second rotating member, and there is a floating gap between the two; or,

[0009] The friction plate is floatingly mounted on the housing, and a floating gap is provided therebetween.

[0010] The spacer is a second elastic member, and the floating gap is greater than the axial displacement of the second rotating member.

[0011] The friction plate is floatingly mounted on the second rotating member, and a floating gap is provided therebetween.

[0012] Or,

[0013] The friction plate is floatingly mounted on the housing, and a floating gap is provided therebetween.

[0014] The spacer is a rigid spacer, and the floating gap is less than the axial displacement of the second rotating member.

[0015] Preferably, when the brake pad contacts the friction plate, the elastic force of the second elastic member is greater than that of the first elastic member.

[0016] Preferably, the guiding member includes a rod portion and a limiting portion. A bushing is mounted on the friction plate, and the bushing is sleeved on the rod portion so that the friction plate can slide relative to the rod portion. One end of the rod portion is provided with a threaded portion, and the rod portion is threadedly connected to the second rotating member or the housing. The limiting portion is provided at the end of the rod portion away from the thread to prevent the bushing from disengaging from the guiding member.

[0017] Preferably, there are a plurality of guiding members, and the plurality of guiding members are circumferentially and evenly distributed on the housing or the second rotating member.

[0018] Preferably, the spacer is a spring or a gasket, and the spacer is sleeved on the rod portion.

[0019] Preferably, the spacer is an elastic washer, or the spacer is a convex ring protruding from the friction plate.

[0020] Preferably, a clearance groove is provided at the center of the friction plate.

[0021] The present invention also provides a garden tool, including the garden tool brake device according to any one of the above technical solutions.

[0022] After adopting the above technical solutions, the present invention has the following beneficial effects.

[0023] 1. A brake device for a gardening tool proposed by the present utility model includes a first rotating member rotatably limited at the end of the main shaft of the gardening tool, a second rotating member floatingly mounted on the main shaft, and a first elastic member pre-pressed between the housing of the gardening tool and the second rotating member. The second rotating member is disposed between the first rotating member and the housing. A chute extending circumferentially and having an inclined bottom along the extending direction is provided on one of the first rotating member and the second rotating member, and a transmission portion at least partially placed in the chute is provided on the other. The transmission portion slides between the two ends of the chute to move the second rotating member away from or closer to the housing. A brake pad is provided on one of the second rotating member and the housing, and a friction plate is provided on the other. The friction plate is floatingly mounted on one of the second rotating member and the housing, and a spacer is provided between this one and the friction plate. The spacer is a second elastic member. The brake pad frictions against the friction plate to brake. By floatingly setting the friction plate and additionally providing a second elastic member, on the one hand, due to the floating of the friction plate, it is not easy for the friction plate and the brake pad to lock. On the other hand, the second elastic member additionally provides a second elastic force to push the second rotating member to move in a direction away from the housing. When the gardening tool needs to be restarted after braking and parking, the superposition of the elastic force of the second elastic member and the elastic force of the first elastic member makes it easier for the second rotating member and the housing to loosen and separate. The gardening tool is easier to start after braking and parking, improving the use experience of the gardening tool. Moreover, through the additionally provided second elastic member, the restoring force of the first elastic member does not need to be used for the separation of the brake pad and the friction plate. Therefore, the elastic force of the first elastic member can be set smaller, so that when the first rotating member and the second rotating member have a small rotational speed difference, the second rotating member can have a sufficient displacement amount to enable the brake pad to also contact and friction against the friction plate, accelerating the braking speed of the gardening tool. Further, the second elastic member is set such that the contact area with the second rotating member or the housing is smaller than the cross-sectional area of the friction plate in the axial direction. In this way, the contact area between the second rotating member or the housing and the second elastic member is reduced. Even if the second elastic member locks with the second rotating member or the housing, the locking force is small. The operator pushes the gardening tool slightly to provide a force for the second elastic member to rotate relative to the second rotating member or the housing. The second elastic member and the second rotating member or the housing can easily separate after overcoming the small locking force, thus more effectively solving the problem that the gardening tool is prone to locking and difficult to start again. The gardening tool is easier to start after braking and parking, improving the use experience of the gardening tool.

[0024] 2. A guiding member is provided on the second rotating member, or a guiding member is provided on the housing; the guiding member guides the floating direction of the friction plate. By providing the guiding member, the guiding member guides the floating movement direction of the friction plate, reducing or avoiding the yaw during the floating movement of the friction plate, resulting in unilateral friction braking with the brake pad and affecting the braking effect. The friction plate can better friction brake with the brake pad, ensuring the braking effect of the brake device of the gardening tool.

[0025] 3. The friction plate is floatingly mounted on the guiding component, and a floating gap is provided therebetween; or, the friction plate is floatingly mounted on the housing, and a floating gap is provided therebetween; the floating gap is greater than the axial displacement of the second rotating component. With such a setting, when the gardening tool brakes with an extremely fast deceleration, even if the axial displacement of the second rotating component reaches the maximum, there is still a gap between the friction plate and the housing. Therefore, the friction plate and the housing will not be locked, and further, the locking between the brake pad and the friction plate is also prevented. The gardening tool can be quickly started after braking and stopping, further improving the user experience of the gardening tool.

[0026] 4. When the brake pad contacts the friction plate, the elastic force of the second elastic member is greater than that of the first elastic member. By configuring the elastic force of the second elastic member to be greater than that of the first elastic member when the brake pad contacts the friction plate, on the one hand, the first elastic member can be compressed to the limit in a relatively short time, shortening the duration of the stage with poor braking effect; on the other hand, the greater elastic force of the second elastic member helps to increase the pressure between the brake pad and the friction plate, improving the braking effect.

[0027] 5. The guiding component includes a rod portion and a limiting portion. A bushing is mounted on the friction plate, and the bushing is sleeved on the rod portion to enable the friction plate to slide relative to the rod portion. One end of the rod portion is provided with a threaded portion, and the rod portion is threadedly connected to the second rotating component or the housing. The limiting portion is provided at the end of the rod portion away from the thread to limit the bushing from disengaging from the guiding component. With such a setting, the friction plate realizes elastic floating through the cooperation of the bushing and the rod portion and the second elastic member, and the limiting portion restricts the disengagement of the friction plate, thereby restricting the floating of the friction plate relative to the housing or the second rotating component in a relatively simple manner and reducing the cost of the braking device of the gardening tool.

[0028] 6. There are multiple guiding components, and the multiple guiding components are circumferentially and evenly distributed on the housing or the second rotating component. With such a setting, the multiple guiding portions circumferentially guide the movement direction of the friction plate, so that when the friction plate is pressed, it can move evenly circumferentially through the second elastic member, and the circumferential contact between the friction plate and the brake pad is more uniform, improving the braking effect of the braking device of the gardening tool.

[0029] 7. The second elastic member is a spring, and the spring is sleeved on the rod portion. With such a setting, the installation of the second elastic member is simpler, and the spring structure is technically mature with a low procurement cost. Using a spring can further reduce the cost of the braking device of the gardening tool; at the same time, when there are multiple guiding components, multiple springs can also be provided, so that when the friction plate and the brake pad contact, the circumferential pressure between the two is more uniform and the braking effect is better.

[0030] 8. The second elastic member is an elastic washer. With such a setting, the elastic washer can circumferentially support the friction plate, so that the circumferential pressure between the friction plate and the brake pad is more uniform when they contact, and the braking effect is better.

[0031] 9. A clearance groove is provided in the center of the friction plate. With this arrangement, it is avoided that the friction plate is installed outside the bearing pressing plate, which additionally increases the lateral width of the gardening tool and avoids the increase of the operation blind areas on both sides of the gardening tool.

[0032] 10. The gardening tool braking device proposed by the present utility model further includes a first rotating member limited at one end of the main shaft of the gardening tool, a second rotating member floating on the main shaft, and a first elastic member pre-pressed between the housing of the gardening tool and the second rotating member. The second rotating member is arranged between the first rotating member and the housing. A circumferentially extending chute is provided on one of the first rotating member and the second rotating member, and one end of the bottom of the chute is inclined towards the other end. A transmission portion at least partially placed in the chute is provided on the other. The transmission portion slides between the two ends of the chute to move the second rotating member away from or close to the housing. A brake pad is provided on one of the second rotating member and the housing, and a friction plate is floatingly installed on the other. The brake pad frictions the friction plate to brake. A rigid spacer is provided on the side of the friction plate facing away from the brake pad, and the contact area between the rigid spacer and the second rotating member or the housing is smaller than the cross-sectional area of the friction plate in the axial direction. Through the floating arrangement of the friction plate and the provision of a rigid spacer on the side of the friction plate facing away from the brake pad, on the one hand, due to the floating of the friction plate and the existence of the first elastic member, after the gardening tool stops, the restoring force of the first elastic member makes it not easy for the friction plate and the brake pad to lock. On the other hand, since the friction plate contacts the second rotating member or the housing through the rigid spacer, and the contact area between the rigid spacer and the second rotating member or the housing is small, even if the rigid spacer locks with the second rotating member or the housing, the locking force is small. When the gardening tool needs to be restarted after braking and stopping, the operator pushes the gardening tool to move slightly to provide a force for the relative rotation of the rigid spacer with respect to the second rotating member or the housing. The rigid spacer and the second rotating member or the housing can be easily separated after overcoming the small locking force, thus effectively solving the problem that the gardening tool is prone to locking and difficult to restart again. The gardening tool is easier to start after braking and stopping, improving the use experience of the gardening tool.

[0033] 11. A guiding member is provided on the second rotating member, or a guiding member is provided on the housing; the guiding member guides the floating movement direction of the friction plate. By providing the guiding member, the guiding member guides the floating movement direction of the friction plate, reducing or avoiding the yaw during the floating movement of the friction plate, resulting in unilateral friction braking with the brake pad and affecting the braking effect. The friction plate can better friction the brake pad to brake, ensuring the braking effect of the gardening tool braking device.

[0034] 12. The friction plate is floatingly mounted on the second rotating member, and a floating gap is provided therebetween; or, the friction plate is floatingly mounted on the housing, and a floating gap is provided therebetween; the floating gap is smaller than the axial displacement of the second rotating member. Since the rigid spacer cannot be compressed and deformed under pressure, by setting a smaller floating gap, when the garden tool decelerates and brakes, before the axial displacement of the second rotating member reaches the maximum, the brake pad and the friction plate can come into contact and friction with each other, causing the garden tool to start braking, improving the response time when the garden tool brakes, and accelerating the braking speed of the garden tool.

[0035] 13. The guiding member includes a rod portion and a limiting portion. A bushing is mounted on the friction plate, and the bushing is sleeved on the rod portion to enable the friction plate to slide relative to the rod portion. One end of the rod portion is provided with a threaded portion, and the rod portion is threadedly connected to the second rotating member or the housing. The limiting portion is provided at the end of the rod portion away from the thread to limit the bushing from disengaging from the guiding member. With such a setting, the friction plate realizes floating through the cooperation of the bushing and the rod portion, and the limiting portion restricts the detachment of the friction plate, restricting the floating of the friction plate relative to the housing or the second rotating member in a relatively simple manner, and reducing the cost of the braking device of the garden tool.

[0036] 14. There are multiple guiding members, and the multiple guiding members are circumferentially and evenly distributed on the housing or the second rotating member. With such a setting, the multiple guiding portions circumferentially guide the movement direction of the friction plate, further reducing or avoiding the yaw during the floating movement of the friction plate, making the circumferential contact between the friction plate and the brake pad more uniform, enabling the friction plate to better friction and brake with the brake pad, and further improving the braking effect of the braking device of the garden tool.

[0037] 15. The rigid spacer is a gasket, and the gasket is sleeved on the rod portion. With such a setting, the installation of the rigid spacer is simpler, and the use cost of the gasket is low, thereby further reducing the cost of the braking device of the garden tool; at the same time, in the scheme of multiple guiding members, multiple gaskets can be provided, so that when the friction plate and the brake pad are in contact, the circumferential pressure between the two is more uniform, and the braking effect is better.

[0038] 16. The rigid spacer is a convex ring protruding from the friction plate. With such a setting, when the friction plate contacts the second rotating member or the housing, due to the presence of the annular protruding rigid spacer, the friction plate can be circumferentially and evenly supported by the second rotating member or the housing, so that the friction plate and the brake pad can stably friction circumferentially, making the braking effect of the garden tool better.

[0039] 17. A clearance groove is provided at the center of the friction plate. With such a setting, it is avoided that the friction plate is installed outside the bearing pressing plate, which additionally increases the lateral width of the garden tool and avoids the increase of the operation blind areas on both sides of the garden tool.

[0040] 18. The present utility model also provides a gardening tool, which adopts the gardening tool braking device described in any one of the above technical solutions. Therefore, the gardening tool has all the technical effects of the above technical solutions.

[0041] These features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagrams of the gardening tool and the gardening tool braking device in Embodiments 1 and 2 of the present utility model;

[0043] Figure 2 For Figure 1 An enlarged view of part A in

[0044] Figure 3 Another schematic diagram of the gardening tool and the gardening tool braking device in Embodiments 1 and 2 of the present utility model;

[0045] Figure 4 For Figure 3 An enlarged view of part B in

[0046] Figure 5 Schematic diagrams of the gardening tool and the gardening tool braking device in Embodiments 3 and 4 of the present utility model;

[0047] Figure 6 For Figure 5 An enlarged view of part C in

[0048] Figure 7 Schematic diagram of the relative positions of the rigid isolation part, the friction plate and the housing in Embodiments 3 and 4 of the present utility model;

[0049] Reference numerals:

[0050] 100, the first rotating member, 101, the transmission part, 110, the first elastic member;

[0051] 200, the second rotating member, 210, the chute;

[0052] 300, the housing, 310, the guiding member, 311, the rod part, 312, the limiting part, 320, the bearing pressing plate;

[0053] 400, the brake pad;

[0054] 500, the friction plate, 510, the second elastic member, 520, the bushing, 530, the clearance groove, 540, the rigid isolation member;

[0055] 600, the driving motor;

[0056] 700, the belt;

[0057] 800. Spindle Detailed implementation

[0058] A braking device for a gardening tool proposed by the present utility model includes a first rotating member limited at one end of the spindle of the gardening tool, a second rotating member floating on the spindle, and a first elastic member pre-pressed between the housing of the gardening tool and the second rotating member. The second rotating member is disposed between the first rotating member and the housing. A circumferentially extending chute is provided on one of the first rotating member and the second rotating member, and one end of the bottom of the chute is inclined towards the other end. A transmission portion is provided on the other, and at least part of the transmission portion is placed in the chute. The transmission portion slides between the two ends of the chute to move the second rotating member away from or closer to the housing. A brake pad is provided on one of the second rotating member and the housing, and a friction plate is floatingly provided on the other. The brake pad frictions the friction plate to brake. An isolation member is provided on the side of the friction plate facing away from the brake pad, and the contact area between the isolation member and the second rotating member or the housing is smaller than the cross-sectional area of the friction plate in the axial direction.

[0059] With such a setting, since the friction plate contacts the second rotating member or the housing through the isolation member, and the contact area between the isolation member and the second rotating member or the housing is small, even if the isolation member is locked with the second rotating member or the housing, the locking force is small. When the gardening tool needs to be restarted after braking and stopping, the operator pushes the gardening tool to move slightly to provide a force for the isolation member to rotate relative to the second rotating member or the housing. The isolation member and the second rotating member or the housing can be easily separated after overcoming the small locking force, thus effectively solving the problem that the gardening tool is prone to locking and difficult to restart again. The gardening tool is easier to start after braking and stopping, improving the use experience of the gardening tool.

[0060] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the accompanying drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work all fall within the protection scope of the present utility model.

[0061] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0062] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" and "several" is two or more, unless otherwise clearly defined.

[0063] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0064] For example, in a Chinese patent application with the patent application publication number CN219840950U and the patent name "A Braking Device for a Gardening Tool and a Gardening Tool", a braking device for a gardening tool is provided. It realizes transmission and automatic braking when the motor stops rotating through the cooperation of a first rotating member, a second rotating member, and the housing of the gardening tool. In this solution, the brake pad is provided on one of the second rotating member and the housing. During braking, the brake pad frictionally brakes against the surface of the other. When the braking speed is relatively fast, the brake pad is likely to be locked between the second rotating member and the housing, making it difficult to start the gardening tool again.

[0065] Embodiment 1:

[0066] To overcome the above-mentioned defects existing in the prior art, as Figures 1 to 4 shown, a braking device for a gardening tool proposed in an embodiment of the present utility model includes a first rotating member 100 limited at one end of the main shaft 800 of the gardening tool, a second rotating member 200 floating on the main shaft 800, and a first elastic member 110 pre-pressed between the housing 300 of the gardening tool and the second rotating member 200. The second rotating member 200 is arranged between the first rotating member 100 and the housing 300.

[0067] In this embodiment, the first rotating member 100 rotates together with the main shaft 800, and the second rotating member 200 can rotate relative to the main shaft 800. The second rotating member 200 is provided with a circumferentially extending chute 210, one end of the bottom of the chute 210 is inclined towards the other end, and the first rotating member 100 is provided with a transmission portion 101 at least partially placed in the chute 210.

[0068] The drive motor 600 of the gardening tool drives the second rotating member 200 to rotate through the belt 700. The second rotating member 200 rotates so that the shallower end of the chute 210 abuts against the transmission portion 101, thereby driving the first rotating member 100 to rotate. The first rotating member 100 is fixedly connected to the main shaft 800, so that the operation of the drive mechanism drives the main shaft 800 to rotate.

[0069] When the drive motor 600 is powered off and decelerates to rotate, the second rotating member 200 decelerates accordingly. Since a working mechanism with a relatively large mass is installed on the main shaft 800, the deceleration is slower, and a speed difference is formed between the first rotating member 100 and the second rotating member 200. The rotational speed of the first rotating member 100 is greater than that of the second rotating member 200. Thus, the transmission portion 101 slides in the chute 210 from the shallower end to the deeper end, so that the cooperation between the transmission portion 101 and the chute 210 pushes the second rotating member 200 towards the housing 300.

[0070] It can be understood that the chute 210 with an inclined bottom surface can also be provided on the first rotating member 100, and the transmission portion 101 can also be provided on the second rotating member 200.

[0071] It can be understood that the drive motor 600 can also drive the second rotating member 200 to rotate through other transmission methods, such as: chain, gear structure, etc.

[0072] It can be understood that the inclination of the bottom of the chute 210 causes a depth difference at both ends of the chute 210, and the depth difference constitutes the axial displacement of the second rotating member 200.

[0073] In some other embodiments, the drive motor 600 drives the first rotating member 100 to rotate. The first rotating member 100 is rotationally limited at one end of the main shaft 800 and can rotate freely relative to the main shaft 800. The second rotating member 200 is floatingly connected to the main shaft 800 through a keyway structure and can slide relative to the main shaft 800. The chute 210 with an inclined bottom surface is provided on the first rotating member 100, and the transmission portion 101 is provided on the second rotating member 200.

[0074] The drive motor 600 drives the first rotating member 100 to rotate. The transmission portion 101 abuts against one end of the chute 210 so that the first rotating member 100 drives the second rotating member 200 to rotate, thereby driving the main shaft 800 to rotate.

[0075] When the drive motor 600 is powered off, a speed difference is generated between the first rotating member 100 and the second rotating member 200. The rotational speed of the second rotating member 200 is greater than that of the first rotating member 100. The cooperation between the transmission portion 101 and the bottom surface of the chute 210 pushes the second rotating member 200 towards the housing 300.

[0076] In the above embodiments, the sliding groove 210 is provided on the second rotating member 200, and the transmission portion 101 is provided on the first rotating member 100. It can be understood that the sliding groove 210 can also be provided on the first rotating member 100. At this time, the transmission portion 101 is provided on the second rotating member 200.

[0077] It should be noted that one of the first rotating member 100 and the second rotating member 200 is equivalent to a driving wheel, and the other is equivalent to a driven wheel. When the sliding groove 210 is provided on the driving wheel, the bottom of the sliding groove 210 is shallower in the front and deeper in the rear; when the sliding groove 210 is provided on the driven wheel, the bottom of the sliding groove 210 is deeper in the front and shallower in the rear.

[0078] In this embodiment, the first elastic member 110 supports the second rotating member 200 with pressure between the first rotating member 100 and the housing 300. When the gardening tool brakes to a stop state, the first elastic member 110 is compressed. When starting the gardening tool, the rotation of the first rotating member 100 or the second rotating member 200 causes a gap to be generated between the bottom surface of the sliding groove 210 and the transmission portion 101. The restoring force of the first elastic member 110 pushes the second rotating member 200 to move in a direction away from the housing 300 to eliminate the gap, and the transmission portion 101 abuts against the bottom surface of the sliding groove 210.

[0079] In this embodiment, a friction plate 500 is provided on the housing 300, and a brake pad 400 is provided on the second rotating member 200. When the driving motor 600 is powered off and the second rotating member 200 approaches the housing 300, the friction plate 500 contacts the brake pad 400. The rotation of the second rotating member 200 causes the friction plate 500 and the brake pad 400 to frictionally brake, and the gardening tool brakes and gradually stops. After the gardening tool brakes and stops, the operator pushes the gardening tool to move slightly, and the first elastic member 110 pushes the second rotating member 200 to move in a direction away from the housing 300 so that the friction plate 500 is separated from the brake pad 400, so that the gardening tool can continue to travel.

[0080] In some other embodiments, the friction plate 500 is provided on the second rotating member 200, and the brake pad 400 is provided on the housing 300.

[0081] It can be understood that the gardening tool braking device can be provided on one side of the gardening tool, or can be provided on the left and right sides of the gardening tool.

[0082] It can be understood that when the gardening tool braking devices are provided on both the left and right sides of the gardening tool, the friction plate 500 and the brake pad 400 can be provided on the gardening tool braking devices on both sides, or can be provided only on the gardening tool braking device on one side.

[0083] In this embodiment, the friction plate 500 is floatingly mounted on the housing 300, and a spacer is provided between the friction plate 500 and the housing 300. The spacer is the second elastic member 510.

[0084] In some other embodiments, the friction plate 500 is floatingly mounted on the second rotating member 200, and a spacer is provided between the friction plate 500 and the second rotating member 200. The spacer is the second elastic member 510.

[0085] When the garden tool brakes and stops or is about to restart, the restoring force of the first elastic member 110 separates the brake pad 400 and the friction plate 500, so as to facilitate the quick start and travel of the garden tool. However, considering the braking effect, the elastic force of the first elastic member 110 should not be set too large. If the elastic force of the first elastic member 110 is too large, on the one hand, when the rotational speed difference between the first rotating member 100 and the second rotating member 200 is small, it is difficult for the brake pad 400 and the friction plate 500 to come into contact and no braking can be achieved; on the other hand, it will also result in insufficient pressure between the brake pad 400 and the friction plate 500 when they come into contact, thus affecting the braking effect. However, the elastic force of the first elastic member 110 cannot be set too small either, because when the garden tool brakes with a relatively high deceleration, the brake pad 400 is easily tightly attached to the friction plate 500, and the restoring force of the first elastic member 110 is required to separate the two. If the elastic force of the first elastic member 110 is small, it will be difficult to separate the two, resulting in difficulty in restarting the garden tool after braking and stopping.

[0086] By floatingly arranging the friction plate 500 and additionally providing the second elastic member 510, on the one hand, due to the floating of the friction plate 500, it is not easy for the friction plate 500 and the brake pad 400 to lock; on the other hand, the compression of the second elastic member 510 additionally provides a force to push the second rotating member 200 to move in a direction away from the housing 300. When the garden tool needs to be restarted after braking and stopping, the superposition of the restoring force of the second elastic member 510 and the restoring force of the first elastic member 110 makes it easier for the second rotating member 200 and the housing 300 to loosen and separate, and the garden tool is easier to start after braking and stopping, improving the use experience of the garden tool; furthermore, through the additionally provided second elastic member 510, the restoring force of the first elastic member 110 does not need to be used for separating the brake pad 400 and the friction plate 500, so the elastic force of the first elastic member 100 can be set smaller, so that when the first rotating member 100 and the second rotating member 200 have a small rotational speed difference, the second rotating member 200 can have a sufficient displacement amount, so that the brake pad 400 can also contact and rub against the friction plate 500, accelerating the braking speed of the garden tool.

[0087] Further, the second elastic member 510 is arranged such that its contact area with the second rotating member 200 or the housing 300 is smaller than the cross-sectional area of the friction plate 500 in the axial direction. In this way, the contact area between the second rotating member 200 or the housing 300 and the second elastic member 510 is reduced. Even if the second elastic member 510 is locked with the second rotating member 200 or the housing 300, the locking force is small. The operator slightly moves the gardening tool to provide a force for the second elastic member 510 to rotate relative to the second rotating member 200 or the housing 300. The second elastic member 510 and the second rotating member 200 or the housing 300 can easily separate after overcoming the small locking force, thus more effectively solving the problem that the brakes of the gardening tool are easily locked and difficult to start again. The gardening tool is easier to start after braking and stopping, improving the user experience of the gardening tool.

[0088] In a preferred embodiment, a guiding member 310 is provided on the housing 300, and the friction plate 500 is floatingly mounted on the guiding member 310. The guiding member 310 guides the floating movement direction of the friction plate 500.

[0089] In another preferred embodiment, a guiding member 310 is provided on the second rotating member 200, and the friction plate 500 is floatingly mounted on the guiding member 310. The guiding member 310 guides the floating movement direction of the friction plate 500.

[0090] By providing the guiding member 310, the guiding member 310 guides the floating movement direction of the friction plate 500, reducing or avoiding the yaw during the floating movement of the friction plate 500, which may cause unilateral friction braking with the brake pad 400 and thus affect the braking effect. The friction plate 500 can better frictionally brake with the brake pad 400, ensuring the braking effect of the braking device of the gardening tool.

[0091] In some other embodiments, the friction plate 500 can also be fixed to one end of the second elastic member 510, and the other end of the second elastic member 510 is fixed to the housing 300 or the second rotating member 200, so that the friction plate 500 is floatingly mounted on the housing 300 or the second rotating member 200.

[0092] In a preferred embodiment, the friction plate 500 is floatingly mounted on the housing 300, and a floating gap is provided between the friction plate 500 and the housing 300. The floating gap is larger than the axial displacement of the second rotating member 200.

[0093] In some other embodiments, the friction plate 500 is floatingly mounted on the second rotating member 200, and a floating gap is provided between the friction plate 500 and the second rotating member 200. The floating gap is larger than the axial displacement of the second rotating member 200.

[0094] With such a setting, when the gardening tool brakes with a very high deceleration, even if the axial displacement of the second rotating member 200 reaches the maximum, there is still a gap between the friction plate 500 and the housing 300. Therefore, the friction plate 500 and the housing 300 will not be locked, and further, the situation where the brake pad 400 and the friction plate 500 are locked is also prevented. After the gardening tool brakes and stops, it can be quickly started, further improving the user experience of the gardening tool.

[0095] In another preferred embodiment, when the brake pad 400 contacts the friction plate 500, the elastic force of the second elastic member 510 is greater than that of the first elastic member 110. That is, the second elastic member 510 is pre-pressed between the friction plate 500 and the housing 300 or the second rotating member 510.

[0096] When the gardening tool brakes, the speed difference between the first rotating member 100 and the second rotating member 200 causes the second rotating member 200 to move towards the housing 300, so that the brake pad 400 and the friction plate 500 come into contact. When the drive motor 600 just stops, the speed difference between the first rotating member 100 and the second rotating member 200 is small, the displacement of the second rotating member 200 is small, and the pressure between the brake pad 400 and the friction plate 500 is also small when they come into contact.

[0097] If the elastic force of the second elastic member 510 is less than that of the first elastic member 110 when the brake pad 400 contacts the friction plate 500, a large part of the displacement of the second rotating member 200 formed by the speed difference will be transferred to the compression of the second elastic member 510. When the second elastic member 510 is compressed to the limit, or the accumulated elastic force of the second elastic member 510 is greater than that of the first elastic member 110, the first elastic member 110 will continue to be compressed. Since the preset elastic force of the first elastic member 110 is small, during the compression process of the first elastic member 110, the pressure between the brake pad 400 and the friction plate 500 remains at a low level, resulting in an unsatisfactory braking effect of the gardening tool during this period.

[0098] By configuring the elastic force of the second elastic member 510 to be greater than that of the first elastic member 110 when the brake pad 400 contacts the friction plate 500, on the one hand, the first elastic member 110 can be compressed to the limit in a relatively short time, shortening the duration of the stage with poor braking effect; on the other hand, the greater elastic force of the second elastic member 510 helps to increase the pressure between the brake pad 400 and the friction plate 500, improving the braking effect.

[0099] In a preferred embodiment, the friction plate 500 is circular or substantially circular, and a clearance groove 530 is provided in the center thereof. Specifically, a cavity for mounting a bearing is recessed in the housing 300. One end of the main shaft 800 passes through the bearing and extends out of the housing 300. A bearing pressure plate 320 is mounted on the outside of the housing 300 to limit the bearing in the cavity and seal and protect the bearing to a certain extent. The clearance groove 530 on the friction plate 500 is used to avoid the bearing pressure plate 320.

[0100] With such a setting, it is avoided that the friction plate 500 is mounted outside the bearing pressure plate 320, which additionally increases the lateral width of the gardening tool and avoids the increase of the operation blind areas on both sides of the gardening tool.

[0101] In a preferred embodiment, the second elastic member 510 is an elastic washer. With such a setting, the elastic washer can circumferentially support the friction plate 500, so that the circumferential pressure between the friction plate 500 and the brake pad 400 is more uniform when they contact, and the braking effect is better.

[0102] In some other embodiments, the second elastic member 510 can also be an elastic plastic or polymeric material, such as polyurethane, nitrile rubber, etc.

[0103] Embodiment 2:

[0104] Based on Embodiment 1, as Figures 1 to 4 shown, in this embodiment, the guiding member 310 includes a rod portion 311 and a limiting portion 312. A bushing 520 is mounted on the friction plate 500. The bushing 520 is sleeved on the rod portion 311 so that the friction plate 500 slides relative to the rod portion 311. One end of the rod portion 311 is provided with a thread, and the rod portion 311 is threadedly connected to the second rotating member 200 or the housing 300. The limiting portion 312 is provided at the end of the rod portion 311 away from the thread to limit the bushing 520 from disengaging from the guiding member 310.

[0105] Among them, the bushing 520 can be fixed on the friction plate 500 and can slide relative to the rod portion 311; alternatively, the bushing 520 can be fixed on the rod portion 311 and the friction plate 500 can slide relative to the bushing 520.

[0106] With such a setting, the friction plate 500 realizes the elastic floating of the friction plate 500 through the cooperation of the bushing 520 and the rod portion 311 and the second elastic member 510. The limiting portion 312 limits the detachment of the friction plate 500, and limits the floating of the friction plate 500 relative to the housing 300 or the second rotating member 200 in a relatively simple manner, reducing the cost of the braking device of the gardening tool.

[0107] More preferably, in this embodiment, a plurality of guiding members 310 are provided, and the plurality of guiding members 310 are circumferentially and uniformly distributed on the housing 300 or the second rotating member 200. With such an arrangement, the plurality of guiding portions circumferentially guide the movement direction of the friction plate 500, so that when the friction plate 500 is pressed, it can move circumferentially and uniformly through the second elastic member 510, and the circumferential contact between the friction plate 500 and the brake pad 400 is more uniform, improving the braking effect of the braking device of the gardening tool.

[0108] Different from the first embodiment, more preferably, in this embodiment, the second elastic member 510 is a spring, and the spring is sleeved on the rod portion 311. With such an arrangement, the installation of the second elastic member 510 is simpler, and the spring structure is technically mature and the procurement cost is low. Using a spring can further reduce the cost of the braking device of the gardening tool; at the same time, in the solution of the plurality of guiding members 310, a plurality of springs can be provided, so that when the friction plate 500 contacts the brake pad 400, the circumferential pressure between the two is more uniform and the braking effect is better.

[0109] For the parts not described in this embodiment, reference can be made to the first embodiment.

[0110] Embodiment Three:

[0111] As Figures 5 to 7 shown, for a braking device of a gardening tool proposed in an embodiment of the present invention, different from the first embodiment, in this embodiment, the second elastic member 510 is not provided. In this embodiment, a rigid spacer 540 is provided on the side of the friction plate 500 facing away from the brake pad 400, and the contact area between the rigid spacer 540 and the second rotating member 200 or the housing 300 is smaller than the cross-sectional area of the friction plate in the axial direction.

[0112] Through the floating setting of the friction plate 500 and with a rigid spacer 540 provided on the side of the friction plate 500 facing away from the brake pad 400, on the one hand, due to the floating of the friction plate 500 and the presence of the first elastic member 110, after the garden tool stops, the restoring force of the first elastic member 110 makes it not easy for the friction plate 500 and the brake pad 400 to lock up. On the other hand, since the friction plate 500 contacts the second rotating member 200 or the housing 300 through the rigid spacer 540, and the contact area between the rigid spacer 540 and the second rotating member 200 or the housing 300 is small, even if the rigid spacer 540 and the second rotating member 200 or the housing 300 lock up, the locking force is small. When the garden tool needs to be restarted after braking and stopping, the operator pushes the garden tool to move slightly to provide a force for the rigid spacer 540 to rotate relative to the second rotating member 200 or the housing 300. The rigid spacer 540 and the second rotating member 200 or the housing 300 can easily separate after overcoming the small locking force, thus effectively solving the problem that the garden tool brake is prone to locking and difficult to restart again. The garden tool is easier to start after braking and stopping, improving the use experience of the garden tool.

[0113] In a preferred embodiment, a guiding member 310 is provided on the housing 300, and the friction plate 500 is floatingly mounted on the guiding member 310, and the guiding member 310 guides the direction of the floating movement of the friction plate 500.

[0114] In another preferred embodiment, a guiding member 310 is provided on the second rotating member 200, and the friction plate 500 is floatingly mounted on the guiding member 310, and the guiding member 310 guides the direction of the floating movement of the friction plate 500.

[0115] By providing the guiding member 310, the guiding member 310 guides the direction of the floating movement of the friction plate 500, reducing or avoiding the yaw during the floating movement of the friction plate 500, resulting in unilateral friction braking with the brake pad 400 and thus affecting the braking effect. The friction plate 500 can better friction brake with the brake pad 400, ensuring the braking effect of the brake device of the garden tool.

[0116] In a preferred embodiment, the friction plate 500 is floatingly mounted on the housing 300, and a floating gap is provided between the friction plate 500 and the housing 300, and the floating gap is smaller than the axial displacement of the second rotating member 200.

[0117] In some other embodiments, the friction plate 500 is floatingly mounted on the second rotating member 200, and a floating gap is provided between the friction plate 500 and the second rotating member 200, and the floating gap is smaller than the axial displacement of the second rotating member 200.

[0118] Since the rigid spacer 540 cannot be compressed and deformed under pressure, by setting a smaller floating gap, when the garden tool decelerates and brakes, before the axial displacement of the second rotating member 200 reaches the maximum, the brake pad 400 and the friction plate 500 can contact and rub against each other, causing the garden tool to start braking, improving the response time when the garden tool brakes and accelerating the braking speed of the garden tool.

[0119] In a preferred embodiment, the friction plate 500 is circular or substantially circular, and a clearance groove 530 is provided in the center thereof. Specifically, a cavity for installing a bearing is recessed in the housing 300. One end of the main shaft 800 passes through the bearing and extends out of the housing 300. A bearing pressing plate 320 is installed outside the housing 300 to limit the bearing in the cavity and seal and protect the bearing to a certain extent. The clearance groove 530 on the friction plate 500 is used to avoid the bearing pressing plate 320.

[0120] With this arrangement, it is avoided that the friction plate 500 is installed outside the bearing pressing plate 320, which would otherwise increase the lateral width of the garden tool and the operation blind areas on both sides of the garden tool.

[0121] In a preferred embodiment, the rigid spacer 540 is a convex ring protruding from the friction plate 500. With this arrangement, when the friction plate 500 contacts the second rotating member 200 or the housing 300, due to the presence of the rigid spacer 540 in the form of a circular protrusion, the friction plate 500 can be evenly supported circumferentially by the second rotating member 200 or the housing 300. Thus, stable circumferential friction can occur between the friction plate 500 and the brake pad 300, resulting in a better braking effect for the garden tool.

[0122] Among them, the convex ring can be an integrally formed circular protrusion on the friction plate 500; or it can be separately provided from the friction plate 500 and fixedly installed on the friction plate 500 through fasteners.

[0123] Embodiment Four:

[0124] Based on Embodiment Three, as Figures 5 to 7 shown, in this embodiment, the guiding member 310 includes a rod portion 311 and a limiting portion 312. A bushing 520 is installed on the friction plate 500. The bushing 520 is sleeved on the rod portion 311 to enable the friction plate 500 to slide relative to the rod portion 311. One end of the rod portion 311 has a thread, and the rod portion 311 is threadedly connected to the second rotating member 200 or the housing 300. The limiting portion 312 is provided at the end of the rod portion 311 away from the thread to prevent the bushing 520 from disengaging from the guiding member 310.

[0125] Among them, the bushing 520 can be fixed on the friction plate 500 and can slide relative to the rod portion 311; or the bushing 520 can be fixed on the rod portion 311 and the friction plate 500 can slide relative to the bushing 520.

[0126] With such a setting, the friction plate 500 realizes the floating of the friction plate 500 through the cooperation of the bushing 520 and the rod portion 311, and the limiting portion 312 restricts the detachment of the friction plate 500, and restricts the floating of the friction plate 500 relative to the housing 300 or the second rotating member 200 in a relatively simple manner, reducing the cost of the brake device of the gardening tool.

[0127] In a more preferred embodiment of the present embodiment, a plurality of guiding members 310 are provided, and the plurality of guiding members 310 are circumferentially and uniformly distributed on the housing 300 or the second rotating member 200. With such a setting, the plurality of guiding portions circumferentially guide the moving direction of the friction plate 500, further reducing or avoiding the yaw during the floating movement of the friction plate 500, making the circumferential contact between the friction plate 500 and the brake pad 400 more uniform, and enabling the friction plate 500 to better frictionally brake with the brake pad 400, further improving the braking effect of the brake device of the gardening tool.

[0128] Different from the first embodiment, in a more preferred embodiment of the present embodiment, the rigid spacer 540 is a gasket, and the rigid spacer 540 is sleeved on the rod portion 311. With such a setting, the installation of the rigid spacer 540 is simpler, and the gasket has a low usage cost, thereby further reducing the cost of the brake device of the gardening tool; at the same time, in the solution of the plurality of guiding members 310, a plurality of gaskets can be provided, so that when the friction plate 500 contacts the brake pad 400, the circumferential pressure between the two is more uniform, and the braking effect is better.

[0129] For the parts not described in this embodiment, reference may be made to the third embodiment.

[0130] Embodiment Five:

[0131] Based on the first to fourth embodiments, the present utility model further proposes a gardening tool, including the brake device of the gardening tool according to any one of the above technical solutions.

[0132] In one embodiment, the gardening tool is a lawn mower, and a auger for mowing is installed on the main shaft 800 of the lawn mower.

[0133] In another embodiment, the gardening tool is a snow sweeper, and a auger for snow sweeping is installed on the main shaft 800 of the snow sweeper.

[0134] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that the present utility model includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present utility model will be included in the scope of the claims.

Claims

1. A garden tool brake device, comprising a first rotating component limited at one end of a main shaft of the garden tool, a second rotating component floating on the main shaft, and a first elastic member pre-pressed between a shell of the garden tool and the second rotating component, the second rotating component being arranged between the first rotating component and the shell, one of the first rotating component and the second rotating component being provided with a circumferentially extending slide groove, one end of the bottom of the slide groove being inclined toward the other end, and the other being provided with a transmission part at least partially placed in the slide groove, the transmission part sliding between the two ends of the slide groove to make the second rotating component move away from or close to the shell, characterized in that A brake pad is provided on one of the second rotating component and the shell, and a friction pad is floatingly provided on the other, the brake pad rubs against the friction pad to brake, and an isolation member is provided on the side of the friction pad facing away from the brake pad, and the contact area between the isolation member and the second rotating component or the shell is smaller than the cross-sectional area of ​​the friction pad in the axial direction.

2. A garden tool brake device as claimed in claim 1, characterized in that: The second rotating component is provided with a guide component, or the housing is provided with a guide component; the guide component guides the direction of the floating movement of the friction plate.

3. A garden tool brake device as claimed in claim 1, characterized in that: The friction plate is floatingly mounted on the second rotating component, and a floating gap is provided between the two; or, The friction plate is floatingly mounted on the housing, with a floating gap between the two; The isolating member is a second elastic member, and the floating gap is greater than the axial displacement of the second rotating member.

4. A garden tool brake device as claimed in claim 1, characterized in that: The friction plate is floatingly mounted on the second rotating component, and a floating gap is provided between the two; or, The friction plate is floatingly mounted on the housing, with a floating gap between the two; The isolating member is a rigid isolating member, and the floating gap is smaller than the axial displacement of the second rotating component.

5. A garden tool brake device as claimed in claim 3, characterized in that: When the brake pad contacts the friction pad, the elastic force of the second elastic member is greater than that of the first elastic member.

6. A garden tool brake device as claimed in claim 2, characterized in that: The guiding component includes a rod and a limiting portion, a sleeve is installed on the friction plate, the sleeve is sleeved on the rod to enable the friction plate to slide relative to the rod, a threaded portion is provided at one end of the rod, the rod is threadedly connected to the second rotating component or the housing, and the limiting portion is provided at one end of the rod away from the thread to limit the sleeve from detaching from the guiding component.

7. A garden tool brake device as claimed in claim 6, characterized in that: There are multiple guide components, and the multiple guide components are evenly distributed on the shell or the second rotating component in the circumferential direction.

8. A garden tool brake device as claimed in claim 6, characterized in that: The isolating member is a spring or a gasket, and the isolating member is sleeved on the rod.

9. A garden tool brake device as claimed in claim 1, characterized in that: The isolating member is an elastic washer, or the isolating member is a convex ring convexly arranged on the friction plate.

10. A garden tool brake device as claimed in claim 1, characterized in that: A clearance groove is arranged in the center of the friction plate.

11. Gardening tools, characterized in that, The invention comprises the garden tool brake device according to any one of claims 1 to 10.

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