Hand-push type mower capable of realizing automatic clutch

Abstract

The utility model discloses a hand-push type mower capable of realizing automatic clutch. The hand-push type mower comprises a vehicle body, a driving wheel, a wheel axle, a motor and a transmission mechanism, the two driving wheels are installed on the vehicle body through a wheel shaft, and separating mechanisms are arranged on the two sides of the wheel shaft to achieve combination or separation of the driving wheels and the wheel shaft. A transmission gear is fixed to the driving wheel, the separating mechanism comprises a separating gear, the separating gear is used for being meshed with the transmission gear, a containing part is arranged in the separating gear and comprises a plurality of ratchet grooves distributed in a surrounding mode, a movable pin is arranged on the wheel shaft in a penetrating mode in the radial direction, and the movable pin is connected with the ratchet grooves in a penetrating mode. When the wheel axle rotates in the first direction, the movable pin is clamped in the containing part, the wheel axle and the separating gear are kept combined, and when the wheel axle rotates in the opposite second direction, the movable pin automatically moves in the containing part, and the wheel axle and the separating gear are kept separated.

Description

Technical Field

[0001] The present application relates to the technical field of lawn mowers, and in particular to a hand-push lawn mower that realizes automatic clutching. Background Art

[0002] There are two types of push mowers: pure manual drive and motor-driven self-propelled. The motor-driven self-propelled mode is more labor-saving, and only requires manual correction operations when turning or reversing. When turning or pulling the mower backward, the machine is generally stopped for operation. Since the motor drives the vehicle shaft to rotate through a series of gear transmission mechanisms, when driving in the reverse direction, the resistance will be very large and will cause certain damage to the motor. Therefore, it is necessary to provide a mower that can realize automatic clutch of the transmission system. Summary of the invention

[0003] Based on this, the present application provides a push lawn mower with automatic clutch to solve the above technical problems.

[0004] The technical solution adopted by the present application to solve the technical problem is: a hand-push lawn mower with automatic clutch, a vehicle body, a driving wheel, a wheel shaft, a motor and a transmission mechanism;

[0005] Two driving wheels are mounted on the vehicle body through wheel axles, and separation mechanisms are provided on both sides of the wheel axles to achieve the connection or separation of the driving wheels and the wheel axles;

[0006] A transmission gear is fixed on the driving wheel, and the disengagement mechanism includes a disengagement gear, which is used to mesh with the transmission gear. An accommodating portion is arranged inside the disengagement gear, and the accommodating portion includes a plurality of circumferentially distributed ratchet grooves. A movable pin is radially penetrated through the wheel axle, so that when the wheel axle rotates in a first direction, the movable pin is engaged in the accommodating portion, so that the wheel axle and the disengagement gear remain combined. When the wheel axle rotates in an opposite second direction, the movable pin automatically moves in the accommodating portion, so that the wheel axle and the disengagement gear remain separated.

[0007] In some embodiments, the ratchet groove includes a stop portion and a guide portion. When the wheel axle rotates in a first direction, one end of the movable pin is blocked by the stop portion, so that the wheel axle and the disengagement gear rotate synchronously; when the wheel axle rotates in an opposite second direction, one end of the movable pin is moved toward the other end by the force of the guide portion and enters into the next interval of the ratchet groove.

[0008] In some embodiments, the ratchet grooves are provided at three evenly distributed and adjacent locations.

[0009] In some embodiments, a counterweight is disposed at one end of the movable pin.

[0010] In some embodiments, the transmission gear is fixed to the inner side of the driving wheel by fasteners.

[0011] In some embodiments, a clutch is provided in the transmission mechanism, and the clutch realizes the connection or disconnection between the motor shaft and the wheel shaft.

[0012] In some embodiments, the transmission mechanism includes a motor shaft gear, a clutch, a first gear shaft, a second gear shaft, and a wheel shaft gear. The clutch includes a clutch housing and a gear ring disposed in the clutch housing. The first gear shaft is mounted on another part of the clutch. The motor shaft gear is meshed with the gear ring, the first gear shaft is meshed with the second gear shaft, and the second gear shaft is meshed with the wheel shaft gear, thereby transmitting the power of the motor to the wheel shaft.

[0013] In some embodiments, when the vehicle body moves forward, the wheel axle rotates in a first direction, and when the vehicle body stops, the clutch disengages the motor shaft from the vehicle shaft, and the vehicle body can move freely backward and cause the wheel axle to rotate in an opposite second direction, at which time the wheel axle and the disengagement gear also remain disengaged.

[0014] In some embodiments, the vehicle body is also provided with a front wheel group and a handle. The front wheel group is arranged at the front part of the vehicle body as a driven wheel, and the driving wheel is arranged in the middle part of the vehicle body. When the vehicle body moves forward, the wheel axle rotates around a first direction. When the vehicle body stops, the wheel axle remains disengaged from the disengagement gear, so that the vehicle body can move freely backward.

[0015] In some embodiments, a cutter head unit is disposed on the vehicle body, the cutter head unit is installed between the front wheel set and the driving wheel, and is driven by an independent power unit.

[0016] The beneficial effects of the present application are that the disengagement mechanism can automatically cut off the power transmission when the lawn mower stops and needs to move backward, thereby reducing the resistance when the lawn mower moves backward, making the operation more convenient, and not damaging the motor; in a further embodiment, a clutch is also provided for disengaging the motor shaft and the vehicle shaft, thereby realizing automatic engagement during startup and automatic disengagement during shutdown, thereby providing a double disengagement solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1It is a schematic diagram of the structure of this application.

[0019] Figure 2 It is an enlarged schematic diagram of the separation mechanism of the present application.

[0020] Figure 3 It is a front structural schematic diagram of the separation mechanism of the present application.

[0021] Figure 4 It is a schematic diagram of the transmission mechanism structure of the present application.

[0022] Figure 5 It is a schematic diagram of the overall structure of the lawn mower of the present application.

[0023] Explanation of the accompanying drawings: 1. Vehicle body, 2. Driving wheel, 21. Transmission gear, 3. Wheel shaft, 4. Motor, 5. Transmission mechanism, 51. Clutch, 52. Motor shaft gear, 53. First gear shaft, 54. Second gear shaft, 55. Wheel shaft gear, 6. Disengagement mechanism, 61. Disengagement gear, 62. Accommodation portion, 63. Ratchet groove, 631. Stop portion, 632. Guide portion, 64. Movable pin, 7. Front wheel assembly, 8. Handle, 9. Cutting head unit; S1. First direction, S2. Second direction. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to achieve. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that the combination of such technical solutions does not exist and is not within the scope of protection of this application.

[0025] In the embodiments of this application, please refer to Figure 1-5 As shown, a push-type lawn mower with automatic clutching comprises a vehicle body 1, a driving wheel 2, a wheel shaft 3, a motor 4 and a transmission mechanism 5;

[0026] Two driving wheels 2 are mounted on the vehicle body 1 via a wheel axle 3, and a separation mechanism 6 is provided on both sides of the wheel axle to realize the connection or separation of the driving wheels 2 and the wheel axle 3;

[0027] A transmission gear 21 is fixed on the driving wheel 2, and the disengagement mechanism 6 includes a disengagement gear 61, which is used to mesh with the transmission gear 21. A receiving portion 62 is provided in the disengagement gear 61, and the receiving portion 62 includes a plurality of circumferentially distributed ratchet grooves 63. A movable pin 64 is radially penetrated on the wheel axle 3, so that when the wheel axle 3 rotates in a first direction, the movable pin 64 is engaged in the receiving portion 62, so that the wheel axle 3 and the disengagement gear 61 remain combined. When the wheel axle 3 rotates in an opposite second direction, the movable pin 64 automatically moves in the receiving portion 62, so that the wheel axle 3 and the disengagement gear 61 remain separated.

[0028] Furthermore, the vehicle body 1 is also provided with a front wheel group 7 and a handle 8. The front wheel group 7 is arranged at the front part of the vehicle body 1 as a driven wheel, and the driving wheel 2 is arranged in the middle part of the vehicle body 1. When the vehicle body 1 moves forward, the wheel axle 3 rotates around a first direction. When the vehicle body 1 stops, the wheel axle 3 remains disengaged from the disengagement gear 61, so that the vehicle body 1 can move freely backward.

[0029] Furthermore, a cutter head unit 9 is provided on the vehicle body 1 , and the cutter head unit 9 is installed between the front wheel set 7 and the driving wheel 2 , and is driven by an independent power unit.

[0030] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0031] Reference Figure 3 As shown, the ratchet groove 63 includes a stop portion 631 and a guide portion 632. When the wheel axle rotates around a first direction S1, one end of the movable pin 64 is blocked by the stop portion 631, so that the wheel axle and the disengagement gear 61 rotate synchronously; when the wheel axle rotates around an opposite second direction S2, one end of the movable pin 64 is moved toward the other end by the force of the guide portion 632 and enters into the next interval of the ratchet groove 63.

[0032] Based on the above-mentioned ratchet grooves 63 , preferably, the ratchet grooves 63 are provided at three evenly distributed and adjacent locations.

[0033] Preferably, a counterweight is provided at one end of the movable pin 64. Thus, when the wheel shaft 3 rotates, it can move relatively quickly toward the heavier end under the action of centrifugal force, thereby realizing rapid engagement.

[0034] To facilitate assembly, the transmission gear 21 is fixed to the inner side of the driving wheel 2 by fasteners.

[0035] As a further solution, in order to achieve double separation and ensure implementation reliability, a clutch 51 is provided in the transmission mechanism 5, and the clutch 51 realizes the connection or separation between the motor shaft and the wheel shaft.

[0036] Specifically, the transmission mechanism 5 includes a motor shaft gear 52, a clutch 51, a first gear shaft 53, a second gear shaft 54, and a wheel shaft gear 55. The clutch 51 includes a clutch 51 housing and a gear ring arranged in the clutch 51 housing. The first gear shaft 53 is installed on another part of the clutch 51; the motor shaft gear 52 is meshed with the gear ring, the first gear shaft 53 is meshed with the second gear shaft 54, and the second gear shaft 54 ​​is meshed with the wheel shaft gear 55, thereby transmitting the power of the motor 4 to the wheel shaft 3.

[0037] When the vehicle body 1 moves forward, the wheel axle 3 rotates in a first direction. When the vehicle body 1 stops, the clutch 51 disengages the motor shaft from the vehicle shaft, and the vehicle body 1 can move freely backward and rotate the wheel axle 3 in the opposite second direction. At this time, the wheel axle 3 and the disengagement gear 61 also remain disengaged.

[0038] Regarding the specific implementation of the above-mentioned clutch 51, those skilled in the art can refer to the Chinese invention patent CN110587721B applied for by the present application on October 14, 2019, which specifically records the implementation method of the clutch 51. No further description will be given here.

[0039] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A push lawn mower with automatic clutch, characterized in that: Vehicle body, driving wheels, wheel axles, motors and transmission mechanisms; Two driving wheels are mounted on the vehicle body through wheel axles, and separation mechanisms are provided on both sides of the wheel axles to achieve the connection or separation of the driving wheels and the wheel axles; A transmission gear is fixed on the driving wheel, and the disengagement mechanism includes a disengagement gear, which is used to mesh with the transmission gear. An accommodating portion is arranged inside the disengagement gear, and the accommodating portion includes a plurality of circumferentially distributed ratchet grooves. A movable pin is radially penetrated through the wheel axle, so that when the wheel axle rotates in a first direction, the movable pin is engaged in the accommodating portion, so that the wheel axle and the disengagement gear remain combined. When the wheel axle rotates in an opposite second direction, the movable pin automatically moves in the accommodating portion, so that the wheel axle and the disengagement gear remain separated.

2. A push lawn mower with automatic clutch according to claim 1, characterized in that: The ratchet groove includes a stop portion and a guide portion. When the wheel shaft rotates in a first direction, one end of the movable pin is blocked by the stop portion, so that the wheel shaft and the separation gear rotate synchronously. When the wheel shaft rotates in the opposite second direction, one end of the movable pin is moved toward the other end by the force of the guide portion and enters into the ratchet groove of the next interval.

3. A push lawn mower with automatic clutch according to claim 1 or 2, characterized in that: The ratchet grooves are arranged at three evenly distributed and adjacent locations.

4. A push lawn mower with automatic clutch according to claim 1 or 2, characterized in that: One end of the movable pin is provided with a counterweight.

5. The hand-push lawn mower with automatic clutch according to claim 1, characterized in that: The transmission gear is fixed to the inner side of the driving wheel by a fastener.

6. The hand-push lawn mower with automatic clutch according to claim 1, characterized in that: A clutch is arranged in the transmission mechanism, and the clutch realizes the connection or separation between the motor shaft and the wheel shaft.

7. A push-type lawn mower with automatic clutch according to claim 6, characterized in that: The transmission mechanism includes a motor shaft gear, a clutch, a first gear shaft, a second gear shaft, and a wheel shaft gear. The clutch includes a clutch housing and a gear ring arranged in the clutch housing. The first gear shaft is installed on another part of the clutch. The motor shaft gear is meshed with the gear ring, the first gear shaft is meshed with the second gear shaft, and the second gear shaft is meshed with the wheel shaft gear, thereby transmitting the power of the motor to the wheel shaft.

8. The hand-push lawn mower with automatic clutch according to claim 6, characterized in that: When the vehicle body moves forward, the wheel axle rotates in a first direction. When the vehicle body stops, the clutch disengages the motor shaft from the vehicle shaft, and the vehicle body can move freely backward, and the wheel axle rotates in an opposite second direction. At this time, the wheel axle and the disengagement gear also remain disengaged.

9. The hand-push lawn mower with automatic clutch according to claim 1, characterized in that: The vehicle body is also provided with a front wheel group and a handle. The front wheel group is arranged at the front part of the vehicle body as a driven wheel, and the driving wheel is arranged in the middle part of the vehicle body. When the vehicle body moves forward, the wheel axle rotates around a first direction. When the vehicle body stops, the wheel axle remains disengaged from the disengagement gear, so that the vehicle body can move freely backward.

10. The hand-push lawn mower with automatic clutch according to claim 9, characterized in that: A cutter head unit is arranged on the vehicle body, and the cutter head unit is installed between the front wheel set and the driving wheel, and is driven by an independent power unit.

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