Mower driving device

Abstract

The utility model discloses a mower driving device which comprises a driving piece and a transmission mechanism, and the transmission mechanism comprises a gear unit and a belt pulley unit. The gear unit is in driving connection with an output shaft of the driving part, the belt pulley unit is in driving connection with a power shaft of the rotary cutter, and the gear unit transmits power provided by the driving part to the belt pulley unit through a transmission shaft; the belt wheel unit comprises a first belt wheel, a second belt wheel and a balance wheel, the first belt wheel and the second belt wheel are in transmission connection through a first synchronous belt, and the balance wheel is located between the first belt wheel and the second belt wheel, abuts against the outer side of the first synchronous belt and pushes the first edge of the first synchronous belt inwards towards the second edge of the first synchronous belt; the balance wheel is assembled on a swing rod and can swing relative to the first belt wheel and the second belt wheel, a tension spring is assembled on the swing rod, and the tension spring provides trend force for the balance wheel to abut against the first synchronous belt all the time. The transmission mechanism provided by the utility model can carry out self-protection, can automatically recover normal operation, and has strong self-adaptive capability.

Description

Technical Field

[0001] The utility model belongs to the technical field of lawn mowers, and in particular relates to a lawn mower driving device. Background Art

[0002] A lawn mower is a mechanical tool used to mow the lawn. Its form is quite diverse, but most lawn mowers used in general households are push-cart lawn mowers. This type of lawn mower generally has a frame, and a rotating cutter facing the ground is arranged below the frame. The front of the frame is provided with a driving wheel, and the rear of the frame is provided with a driving wheel. When in use, the power device is started to make the rotating cutter rotate rapidly, and the driving wheel and the driving wheel touch the ground. The user holds the hand push rod and pushes the lawn mower forward to mow the lawn along the way. In existing lawn mowers, the driving parts are mostly directly connected to the blade by the output shaft to output power. The installation is relatively convenient and the power output is direct. However, there are the following disadvantages in the actual use process: when the blade hits a hard object or a large amount of debris is entangled on the blade, the blade will be stuck, which will directly affect the power output of the driving part and affect the continuity of the entire mowing operation. It is usually necessary to shut down and restart, which affects the operation efficiency. In serious cases, it will also cause damage to the driving part. Summary of the invention

[0003] In view of the above technical problems, the utility model provides a lawn mower driving device, which can significantly reduce the influence of blade jam on the power output of the driving member when the blade is jammed, thereby ensuring the efficiency of the lawn mowing operation and avoiding damage to the driving device.

[0004] The invention objective of the utility model is achieved through the following technical solutions:

[0005] A lawn mower drive device comprises a driving member and a transmission mechanism, the transmission mechanism comprises a gear unit and a pulley unit; the gear unit is drivingly connected to the output shaft of the driving member, the pulley unit is drivingly connected to the power shaft of a rotary cutter, and the gear unit transmits the power provided by the driving member to the pulley unit through a transmission shaft; the pulley unit comprises a first pulley, a second pulley and a swing wheel, the first pulley and the second pulley are connected through a first synchronous belt transmission, the swing wheel is located between the first pulley and the second pulley, and is pressed against the outside of the first synchronous belt to push the first side of the first synchronous belt toward the second side; the swing wheel is mounted on a swing rod and can swing relative to the first pulley and the second pulley, and a tension spring is mounted on the swing rod, the tension spring provides a tendency force for the swing wheel to always press against the first synchronous belt.

[0006] Preferably, the output shaft of the driving member is arranged horizontally, the power shaft of the rotary cutter is arranged vertically, and the gear unit comprises a first gear and a second gear meshing with each other, and both the first gear and the second gear are bevel gears.

[0007] Preferably, the transmission shaft is arranged in a vertical direction, the first gear is fixedly connected to the output shaft of the driving member, the second gear is fixedly arranged at the upper end of the transmission shaft; and the first pulley is fixedly arranged at the lower end of the transmission shaft.

[0008] Preferably, the power shaft of the rotary cutter is rotatably mounted on the mounting disk, and the second pulley is fixedly sleeved on the power shaft and is located below the mounting disk.

[0009] Preferably, the pendulum rod comprises a rotating end and an assembly end which are arranged opposite to each other, the rotating end is rotatably assembled on the assembly disk, and the balance wheel is suspended below the assembly end.

[0010] Preferably, the central axis of the balance wheel is parallel to the central axes of the first pulley and the second pulley, and the balance wheel is arranged close to the first pulley. The above arrangement can increase the swing torque of the balance wheel, reduce its swing resistance, and can respond more sensitively to the jamming of the second pulley.

[0011] Preferably, an anti-slip edge is protrudingly provided on the wheel wall of the balance wheel to prevent the first synchronous belt from slipping out, and the anti-slip edges are arranged at intervals along the axial direction of the balance wheel.

[0012] Preferably, the two anti-slip edges are respectively arranged at the upper end and the lower end of the balance wheel, the first synchronous belt is close to the middle of the balance wheel, and the distance between the two anti-slip edges is greater than the width of the first synchronous belt. The above arrangement can make the first synchronous belt have a certain degree of mobility in the axial direction of the balance wheel to avoid jamming.

[0013] Preferably, the pulley unit further comprises a third pulley drivingly connected to the driving shaft of the driving wheel, and the third pulley is drivingly connected to the first pulley via a second synchronous belt.

[0014] Preferably, the first pulley is provided with a first belt groove and a second belt groove in sections along its axial direction, the first synchronous belt sleeve is in the first belt groove, and the second synchronous belt sleeve is in the second belt groove.

[0015] Compared with the prior art, the utility model has the following beneficial effects: by setting the balance wheel, the tension of the first synchronous belt can be adjusted in real time, when encountering a hard object during the operation process, the transmission mechanism can protect itself to avoid damage to the components, and after passing the hard object, the transmission mechanism can automatically resume normal operation, with strong self-adaptation, the entire operation process is coherent and smooth, there will be no jamming, and the operation efficiency is high; through the cooperation of the gear unit and the pulley unit, cross transmission can be achieved, so that the layout of the entire drive device is more reasonable and compact, and the output torque can be adjusted by adjusting the gear ratio and the wheel diameter ratio, which is energy-saving and efficient; the driving wheel and the rotary cutter share a power source, and by optimizing the structure of the transmission mechanism, when the rotary cutter encounters a hard object, the transmission mechanism can protect itself and automatically resume normal operation, eliminating the influence of the running resistance of the rotary cutter on the driving wheel, and the driving wheel can always maintain stable movement without the need to shut down and restart. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a new structure is used for this purpose;

[0017] Figure 2 This is a schematic diagram of the transmission mechanism structure in the utility model;

[0018] Markings in the figure: first gear 11; second gear 12; transmission shaft 13; first pulley 14; second pulley 15; third pulley 16; balance wheel 171; anti-slip edge 1711; swing rod 172; first synchronous belt 18; second synchronous belt 19; engine 20; output shaft 21; power shaft 31; assembly disk 32; drive wheel 41. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 2 As shown, this embodiment discloses a lawn mower driving device, which includes a driving member and a transmission mechanism. In this embodiment, the driving member is an engine 20, and the transmission mechanism includes a gear unit and a pulley unit.

[0020] The gear unit is drivingly connected to the output shaft 21 of the engine 20, and the pulley unit is drivingly connected to the power shaft 31 of the rotary cutter 33. The gear unit transmits the power provided by the driving member to the pulley unit through a transmission shaft 13; the pulley unit includes a first pulley 14, a second pulley 15 and a balance wheel 171, the first pulley 14 and the second pulley 15 are connected by a first synchronous belt 18, the balance wheel 171 is located between the first pulley 14 and the second pulley 15, and is pressed against the outer side of the first synchronous belt 18 to push the first side of the first synchronous belt 18 inward toward the second side; the balance wheel 171 is mounted on a swing rod 172, and can swing relative to the first pulley 14 and the second pulley 15, and a tension spring is mounted on the swing rod 172, and the tension spring provides a tendency force for the balance wheel 171 to always press against the first synchronous belt 18. By setting the balance wheel 171, the tension of the first synchronous belt 18 can be adjusted in real time. When the rotary cutter 33 encounters a hard object and causes the second pulley 15 to get stuck, the balance wheel 171 will swing to adjust the tension of the first synchronous belt 18 to avoid the second pulley 15 from affecting the first pulley 14. Except for the second pulley 15, other components of the drive device can operate normally, and the lawn mower can still operate normally. When the rotary cutter 33 passes over the hard object, the running resistance of the second pulley 15 disappears. Under the action of the balance wheel 171, the tension of the first synchronous belt 18 is restored, and the second pulley 15 resumes normal operation under the drive of the first pulley 14. When encountering a hard object during the operation process, the transmission mechanism can protect itself to avoid damage to the components, and after passing over the hard object, the transmission mechanism can resume normal operation by itself, with strong adaptability, and the entire operation process is continuous and smooth without jamming, and the operation efficiency is high.

[0021] The output shaft 21 of the engine 20 is arranged horizontally, the power shaft 31 of the rotary cutter 33 is arranged vertically, the gear unit includes a first gear 11 and a second gear 12 meshing with each other, and the first gear 11 and the second gear 12 are both bevel gears; the transmission shaft 13 is arranged vertically, the first gear 11 is fixedly connected to the output shaft 21 of the driving member, the second gear 12 is fixedly arranged at the upper end of the transmission shaft 13; the first pulley 14 is fixedly arranged at the lower end of the transmission shaft 13. Through the cooperation of the gear unit and the pulley unit, cross transmission can be realized, making the layout of the entire drive device more reasonable and compact, and the output torque can be adjusted by adjusting the gear ratio and the wheel diameter ratio, which is energy-saving and efficient.

[0022] The power shaft 31 of the rotary cutter 33 is rotatably assembled on the assembly disk 32, and the second pulley 15 is fixedly mounted on the power shaft 31 and is located below the assembly disk 32; the swing arm 172 includes a rotating end and an assembly end that are relatively arranged, and the rotating end is rotatably assembled on the assembly disk 32, and the balance wheel 171 is rotatably suspended below the assembly end. The above layout can make full use of the assembly space and make the structure of the entire lawn mower more compact; the central axis of the balance wheel 171 is parallel to the central axes of the first pulley 14 and the second pulley 15, and is arranged close to the first pulley 14. The above arrangement can increase the swing torque of the balance wheel 171 and reduce its swing resistance, so as to respond more sensitively to the jamming of the second pulley 15.

[0023] An anti-slip edge is protrudingly provided on the wheel wall of the balance wheel 171 to prevent the first synchronous belt 18 from slipping out, and the anti-slip edge is arranged at intervals along the axial direction of the balance wheel 171; the two anti-slip edges are respectively arranged at the upper end and the lower end of the balance wheel 171, and the first synchronous belt 18 is abutted against the middle part of the balance wheel 171. The spacing between the two anti-slip edges is greater than the width of the first synchronous belt 18. The above arrangement can enable the first synchronous belt 18 to have a certain degree of mobility in the axial direction of the balance wheel 171 to avoid jamming.

[0024] The pulley unit also includes a third pulley 16 which is connected to the driving shaft of the driving wheel 41. The third pulley 16 is connected to the first pulley 14 through the second synchronous belt 19. The first pulley 14 is provided with a first belt groove and a second belt groove in sections along its axial direction. The first synchronous belt 18 is inserted in the first belt groove, and the second synchronous belt 19 is inserted in the second belt groove. The setting of the balance wheel 171 eliminates the influence of the second pulley 15 on the first pulley 14, thereby eliminating the influence of the running resistance of the rotary cutter 33 on the driving wheel 41. The driving wheel 41 and the rotary cutter 33 can share a power source. When the rotary cutter 33 encounters a hard object, the transmission mechanism can protect itself and restore normal operation by itself. The driving wheel 41 can always maintain stable movement without frequent shutdown and restart. It has strong adaptive ability and is energy-saving and efficient.

[0025] It should be understood that in the claims and description of the utility model, all "including..." should be understood as open-ended meanings, that is, their meanings are equivalent to "at least including...", and should not be understood as closed-ended meanings, that is, their meanings should not be understood as "only including...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0026] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should be covered by the protection scope of the utility model.

Claims

1. A lawn mower drive device, characterized in that: It includes a driving member and a transmission mechanism, the transmission mechanism includes a gear unit and a pulley unit; the gear unit is drivingly connected to the output shaft of the driving member, the pulley unit is drivingly connected to the power shaft of the rotary cutter, and the gear unit transmits the power provided by the driving member to the pulley unit through a transmission shaft; the pulley unit includes a first pulley, a second pulley and a balance wheel, the first pulley and the second pulley are connected through a first synchronous belt transmission, the balance wheel is located between the first pulley and the second pulley, and is pressed against the outer side of the first synchronous belt to push the first side of the first synchronous belt toward the second side; the balance wheel is installed on a swing rod and can swing relative to the first pulley and the second pulley, and a tension spring is installed on the swing rod, and the tension spring provides a tendency force for the balance wheel to always press against the first synchronous belt.

2. A lawn mower drive device according to claim 1, characterized in that: The output shaft of the driving member is arranged horizontally, the power shaft of the rotary cutter is arranged vertically, and the gear unit comprises a first gear and a second gear meshing with each other, and both the first gear and the second gear are bevel gears.

3. A lawn mower driving device according to claim 2, characterized in that: The transmission shaft is arranged in a vertical direction, the first gear is fixedly connected to the output shaft of the driving member, the second gear is fixedly arranged at the upper end of the transmission shaft; and the first pulley is fixedly arranged at the lower end of the transmission shaft.

4. A lawn mower drive device according to claim 3, characterized in that: The power shaft of the rotary cutter is rotatably mounted on the mounting plate, and the second pulley is fixedly sleeved on the power shaft and is located below the mounting plate.

5. A lawn mower driving device according to claim 4, characterized in that: The swing rod comprises a rotating end and an assembly end which are arranged opposite to each other. The rotating end is rotatably assembled on the assembly plate, and the balance wheel is suspended below the assembly end.

6. A lawn mower driving device according to claim 5, characterized in that: The central axis of the balance wheel is parallel to the central axes of the first pulley and the second pulley, and the balance wheel is arranged close to the first pulley.

7. A lawn mower drive device according to any one of claims 1 to 6, characterized in that: An anti-slip edge is protrudingly provided on the wheel wall of the balance wheel to prevent the first synchronous belt from slipping out, and the anti-slip edges are arranged at intervals along the axial direction of the balance wheel.

8. A lawn mower driving device according to claim 7, characterized in that: The two anti-slip edges are respectively arranged at the upper end and the lower end of the balance wheel, the first synchronous belt is close to the middle part of the balance wheel, and the distance between the two anti-slip edges is greater than the width of the first synchronous belt.

9. A lawn mower driving device according to claim 1, characterized in that: The pulley unit also includes a third pulley drivingly connected to the driving shaft of the driving wheel, and the third pulley is drivingly connected to the first pulley via a second synchronous belt.

10. A lawn mower driving device according to claim 9, characterized in that: The first pulley is provided with a first belt groove and a second belt groove in sections along its axial direction. The first synchronous belt sleeve is in the first belt groove, and the second synchronous belt sleeve is in the second belt groove.

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