CN220452656U - Gearbox for riding mower and riding mower - Google Patents

Abstract

The application discloses a gearbox for riding mower and riding mower. The gearbox comprises a shell, an input shaft and a gear shifting fork, wherein the input shaft and the gear shifting fork are embedded in the shell, and the inner rotating link of the shell is provided with: an intermediate shaft in transmission connection with the input shaft; the gear shifting device comprises a gear shifting shaft in transmission connection with an intermediate shaft, a multi-gear driven gear capable of rotating relative to the gear shifting shaft is sleeved on the gear shifting shaft, the intermediate shaft transmits power to enable the multi-gear driven gear to rotate, a transition shaft in transmission connection with the gear shifting shaft and an output shaft in transmission connection with the transition shaft, wherein the gear shifting shaft is provided with at least two sliding grooves along the axis direction of the gear shifting shaft, elastic clamping pieces are arranged in each sliding groove, the elastic clamping pieces are fixed through sliding sleeves sleeved on the gear shifting shaft, the sliding sleeves are connected with gear shifting forks, the gear shifting forks are shifted to rotate, and then the gear shifting sleeves are pushed to move along the axial direction of the gear shifting shaft, so that the elastic clamping pieces and the multi-gear driven gear are closed to realize gear selection, and free switching of a plurality of gears is realized.

Description

Gearbox for riding mower and riding mower

Technical Field

The application relates to the technical field of garden machinery, in particular to a gearbox for a riding mower and the riding mower.

Background

The traditional hand-held garden machine product is time-consuming and labor-consuming and has low working efficiency; the lawn mower with the self-propelled gearbox mainly utilizes the high-speed rotation of the engine to drive the gearbox to drive the wheel shaft to walk, and simultaneously drives the blade to rotationally cut. The working intensity and the working time of weeding workers are saved, a large amount of human resources are reduced, the working efficiency is improved, and the weeding machine is widely applied to the field of landscaping machinery.

The prior self-propelled gearbox structure of the lawn mower has the main structure that a primary bevel gear speed reducing mechanism is adopted, engine power is input through a driving gear, a driven gear is fixedly assembled on a wheel shaft by virtue of a pin shaft, when the driving gear rotates at a high speed, the driven gear is meshed to drive the driven gear to rotate and reduce the speed, the driven gear is fixedly assembled with the wheel shaft, and finally, the wheel shaft synchronously rotates, so that the lawn mower is driven to self-propelled.

Disclosure of Invention

To overcome the above drawbacks, the object of the present application is: the utility model provides a gearbox and riding mower for riding mower is closed through setting up elasticity fastener and multispeed driven gear to transmit the moment of torsion on the multispeed gear to the gearshift axle, realize the free switching of a plurality of gears.

In order to achieve the above purpose, the present application adopts the following technical scheme:

a gearbox for a riding mower, comprising

The gear shifting device comprises a shell, an input shaft and a gear shifting fork, wherein the input shaft and the gear shifting fork are embedded in the shell, and the shell is internally provided with:

the intermediate shaft is in transmission connection with the input shaft,

the gear shifting shaft is in transmission connection with the intermediate shaft, a multi-gear driven gear which can rotate relative to the gear shifting shaft is sleeved on the gear shifting shaft, the intermediate shaft transmits power to enable the multi-gear driven gear to rotate,

the transition shaft is in transmission connection with the gear shifting shaft,

the output shaft is in transmission connection with the transition shaft and penetrates through the shell,

the gear shifting device comprises a gear shifting shaft, a plurality of elastic clamping pieces, a gear shifting fork, a gear shifting sleeve and a plurality of elastic clamping pieces, wherein the gear shifting shaft is provided with at least two sliding grooves along the axial direction of the gear shifting shaft, the elastic clamping pieces are arranged in each sliding groove, the elastic clamping pieces are fixed through the sliding sleeve sleeved on the gear shifting shaft, the sliding sleeve is connected with the gear shifting fork, the gear shifting fork is shifted to rotate, the gear shifting sleeve is pushed to move along the axial direction of the gear shifting shaft, and the elastic clamping pieces and the multi-gear driven gear are closed to realize gear selection.

In an embodiment, the elastic clamping piece comprises a gentle portion arranged in the sliding groove and a tilting portion extending towards the height direction of the sliding groove, the tilting portion is configured to reciprocate along the height direction of the sliding groove, one end, far away from the sliding sleeve, of the tilting portion is provided with a protruding block, an initial surface is formed on one side, corresponding to the sliding sleeve, of the protruding block, and a transitional cambered surface is formed on one side, far away from the sliding sleeve, of the protruding block.

Further, an included angle formed by the extension axis of the gentle part and the axis of the tilting part is 4-6 degrees, an included angle formed by the extension axis of the initial surface and the axis of the tilting part is 40-50 degrees, and an included angle formed by the axis of the transitional cambered surface and the axis of the tilting part is 35-46 degrees.

In an embodiment, the number of the elastic clamping pieces is 3-5.

In an embodiment, the shift fork comprises a shifting plate arranged outside the shell and a rotating shaft connected with the shifting plate and embedded in the shell, and a shifting block connected with the sliding sleeve is arranged on the rotating shaft.

Further, a sector plate is further arranged on the rotating shaft, a wavy contact surface is arranged on the sector plate, and the shell is connected with a round steel ball through an elastic piece to be abutted against the wavy contact surface.

Further, a sealing ring is arranged between the elastic piece and the shell.

In one embodiment, the housing is provided with a ventilation valve.

In one embodiment, one end of the shift shaft, which is far away from the shift fork, extends axially to the outside of the housing and is provided with a brake structure,

the brake structure is in including setting up the brake disc of gear shift axle tip, fixed brake seat and the first brake splint of setting on the casing, the brake seat corresponds one side of brake disc is provided with the second brake splint, the second brake splint is kept away from one side of brake disc is connected with the brake and dials the board through the push rod, the brake dial board pass through reset spring with the brake seat is connected, the lateral part of brake dial board with still be connected with reset torsion spring between the brake seat.

The application also provides a riding mower comprising the gearbox beneficial effects

According to the gear shifting device, the shifting fork is shifted to rotate, the shifting sleeve and the elastic clamping piece are pushed to axially move along the gear shifting shaft, the elastic clamping piece and the multi-gear driven gear wheel are enabled to be in=closed, torque on the multi-gear is transmitted to the gear shifting shaft, and free switching of multiple gears is achieved

Drawings

The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure. The shapes and sizes of the various components in the drawings are not to scale, and are intended to be illustrative only of the present application.

FIG. 1 is a schematic diagram of a transmission structure according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an internal structure of a transmission according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a transmission provided in an embodiment of the present application;

FIG. 4 is a schematic partial cross-sectional view of a transmission provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a shift shaft according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of an elastic engaging member according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a shift fork according to an embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional view of a brake structure according to an embodiment of the present application.

Detailed Description

The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present application and are not limiting the scope of the present application. The implementation conditions employed in the examples may be further adjusted as in the case of the specific manufacturer, and the implementation conditions not specified are typically those in routine experiments.

Unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used in embodiments of the present disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. In this context, "electrically connected" includes the case where constituent elements are connected together by an element having some electric action. The "element having a certain electric action" is not particularly limited as long as it can transmit and receive an electric signal between the constituent elements connected. The "element having some kind of electrical action" may be, for example, an electrode or a wiring, or a switching element such as a transistor, or other functional element such as a resistor, an inductor, or a capacitor. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

In the present application, the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "middle", and the like are based on the azimuth or positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

The application discloses gearbox for riding mower, this gearbox includes casing, embedded input shaft and shift fork in the casing, and the casing internal rotation links has: an intermediate shaft in transmission connection with the input shaft; the gear shifting device comprises a gear shifting shaft in transmission connection with an intermediate shaft, a multi-gear driven gear capable of rotating relative to the gear shifting shaft is sleeved on the gear shifting shaft, the intermediate shaft transmits power to enable the multi-gear driven gear to rotate, a transition shaft in transmission connection with the gear shifting shaft, an output shaft in transmission connection with the transition shaft penetrates through a shell, a plurality of sliding grooves are formed in the gear shifting shaft along the axis direction of the gear shifting shaft, elastic clamping pieces are arranged in each sliding groove, the elastic clamping pieces are fixed through sliding sleeves sleeved on the gear shifting shaft, the sliding sleeves are connected with the gear shifting fork, the gear shifting fork is shifted to rotate, and then the gear shifting sleeve is pushed to move along the axial direction of the gear shifting shaft, so that the elastic clamping pieces and the multi-gear driven gear are pushed to move along the axial direction of the gear shifting shaft, and the elastic clamping pieces and the multi-gear driven gear are closed, so that torque on the multi-gear is transmitted to the gear shifting shaft, and free switching of the gears is achieved.

The application provides a riding mower, the gearbox in this riding mower just can realize the switching of gear, is convenient for riding mower's use.

The gearbox proposed in the present application is described next with reference to fig. 1-8.

The gearbox comprises a housing 10, an input shaft 20 and a shift fork 70 which are embedded in the housing, wherein the rotating link of the housing is as follows:

an intermediate shaft 30, which is in driving connection with the input shaft 20,

a gear shift shaft 40 in transmission connection with the intermediate shaft 30, a multi-gear driven gear 41 capable of rotating relative to the gear shift shaft 40 is sleeved on the gear shift shaft 40, the intermediate shaft 30 transmits power to enable the multi-gear driven gear 41 to rotate,

a transition shaft 50, which is in driving connection with the gear shift shaft 40,

an output shaft 60, which is in driving connection with the transition shaft 50 and penetrates the housing,

at least two sliding grooves 42 are formed in the gear shifting shaft 40 along the axial direction of the gear shifting shaft, elastic clamping pieces 44 are arranged in each sliding groove 41, the plurality of elastic clamping pieces 44 are fixed through sliding sleeves 43 sleeved on the gear shifting shaft 40, the sliding sleeves 43 are connected with gear shifting forks 70, the gear shifting forks 70 are shifted to rotate, and then the gear shifting sleeves 43 are pushed to move along the axial direction of the gear shifting shaft 40, so that the elastic clamping pieces 44 and the multi-gear driven gear 41 are closed to realize gear selection.

Specifically, referring to fig. 2-4, in the present application, the input shaft 20 is connected to a power source, a first bevel gear 21 is disposed on the input shaft 20, a second bevel gear 32 meshed with the first bevel gear 21 is disposed on the intermediate shaft 30, the multi-gear driven gear 41 may be specifically configured as a five-gear driven gear, which includes a reverse driven gear 411, a first-gear driven gear 412, a second-gear driven gear 413, a third-gear driven gear 414, and a fourth-gear driven gear 415, a five-gear driven gear 31 is also disposed on the intermediate shaft 31, the five-gear driven gear 31 includes a reverse driving gear 311, a first-gear driven gear 312, a second-gear driven gear 313, a third-gear driven gear 314, and a fourth-gear driven gear 315, where the reverse driven gear 411 and the reverse driving gear 311 are connected by a chain 46, and are meshed with each other, and of course, for the multi-gear driven gear may also be configured as a four-gear driven gear and a six-gear driven gear, where the speed reducer 45 is not specifically defined to be further configured to be further meshed with the first end of the reduction gear 45, and the reduction gear 45 is further configured to be meshed with the third reduction gear 53, and the reduction gear 45 is further configured with the first end of the reduction gear 45 and the reduction gear 53.

Referring to fig. 5 to 6, in the present embodiment, the elastic engaging member 44 includes a flat portion 441 disposed in the sliding groove and a tilting portion 442 extending in the height direction of the sliding groove, the tilting portion 442 can reciprocate along the height direction of the sliding groove, one end of the tilting portion 442, which is far away from the sliding sleeve 43, is provided with a protrusion 443, one side of the protrusion 443, which corresponds to the sliding sleeve 43, is formed with a start surface 445, one side of the protrusion 443, which is far away from the sliding sleeve 43, is formed with a transitional cambered surface 444, and the shifting fork 70 is rotated to push the shifting sleeve 43 to move in the axial direction of the shifting shaft, so that the protrusion 443 on the tilting portion in the elastic engaging member 44 is closed with the third-gear driven gear 414, torque on the third-gear driven gear 414 is transmitted to the shifting shaft 40, at this time, the rotational speed on the shifting shaft 40 is third-gear, and if the third-gear driven gear 412 is closed, the rotational speed of the shifting shaft is first-gear;

referring to fig. 6, further, the angle formed by the extended axis of the flat portion 441 and the axis of the tilting portion 442 is 4-6 °, the angle formed by the extended axis of the initial surface and the axis of the tilting portion is 40-50 °, the angle formed by the axis of the transitional cambered surface and the axis of the tilting portion is 35-46 °, preferably, the angle formed by the extended axis of the flat portion and the axis of the tilting portion is 5 °, the angle formed by the extended axis of the initial surface and the axis of the tilting portion is 50 °, and the angle formed by the axis of the transitional cambered surface and the axis of the tilting portion is 46 °, which is designed to facilitate reducing the stress of the bump when the bump is closed with the multi-gear driven gear, so that the bump is easier to be closed with the multi-gear driven gear 41, and has the guiding function.

In the present embodiment, the number of the elastic engaging members 44 is 3-5, the number of the corresponding sliding grooves 42 is also 3-5, preferably, the number of the elastic engaging members 44 is 4, and the 4 elastic engaging members are uniformly distributed on the axial surface of the shift shaft.

Referring to fig. 7, in the present embodiment, the shift fork 70 includes a rotating shaft 71 embedded in the housing 10, a shifting block 72 connected to the sliding sleeve 43 is disposed on the rotating shaft 71, the shifting block 72 drives the sliding sleeve 43 to move along the axial direction of the shift shaft 40 by rotating the rotating shaft 71, further, a sector plate 73 is disposed on the rotating shaft 71, a wave-shaped contact surface 731 is disposed on the sector plate 73, the housing 10 is connected with a steel ball 75 via an elastic member 74 to abut against the wave-shaped contact surface 731, and plays a role of prompting and limiting by providing the steel ball 75, further, in order to avoid oil liquid from being sprayed out during operation of the gearbox, a sealing ring (not shown in the drawing) is considered to be disposed between the elastic member and the housing, so as to play a role of sealing oil.

Referring to fig. 1, in the present embodiment, a ventilation valve 11 is provided in a housing 10 to exclude oil temperature pressure in the housing 10 and reduce internal pressure.

Referring to fig. 8, in the present embodiment, one end of the shift shaft 40, which is far away from the shift fork 70, axially extends to the outside of the housing 10 and is provided with a brake structure 80, the brake structure 80 includes a brake disc 81 disposed at the end of the shift shaft, a brake seat 82 and a first brake clamping plate 83 fixedly disposed on the housing, a second brake clamping plate 84 is disposed on one side of the brake disc 82 corresponding to the brake disc, a brake pulling plate 86 is connected to one side of the second brake clamping plate 84, which is far away from the brake disc 81, through a push rod, the brake pulling plate 86 is connected to the brake seat 72 through a return spring 87, a return torsion spring 88 is further connected between the side of the brake pulling plate 86 and the brake seat, and when the brake pulling plate moves toward the shift shaft, the push rod is driven to move toward the brake disc direction, so that the second brake clamping plate cooperates with the first brake clamping plate to clamp the brake disc, and further the shift shaft stops rotating, thereby realizing a braking operation.

The foregoing embodiments are provided to illustrate the technical concept and features of the present application and are intended to enable those skilled in the art to understand the contents of the present application and implement the same according to the contents, and are not intended to limit the scope of the present application. All such equivalent changes and modifications as come within the spirit of the disclosure are desired to be protected.

Claims (10)

1. A gearbox for a riding mower, comprising: the gear shifting device comprises a shell, an input shaft and a gear shifting fork, wherein the shell is internally provided with: the intermediate shaft is in transmission connection with the input shaft, the gear shifting shaft is in transmission connection with the intermediate shaft, a multi-gear driven gear sleeved on the gear shifting shaft is used for transmitting power to enable the multi-gear driven gear to rotate, the transition shaft is in transmission connection with the gear shifting shaft, the output shaft is in transmission connection with the transition shaft and penetrates through the shell,

the gear shifting device comprises a gear shifting shaft, at least two sliding grooves are formed in the axial direction of the gear shifting shaft, elastic clamping pieces are arranged in each sliding groove, the elastic clamping pieces are fixed through sliding sleeves sleeved on the gear shifting shaft, the sliding sleeves are connected with gear shifting forks, and the gear shifting forks are shifted to rotate so as to realize gear selection.

2. The gearbox for a riding mower according to claim 1, wherein the gearbox comprises a gear box,

the elastic clamping piece comprises a gentle portion arranged in the sliding groove and a tilting portion extending towards the height direction of the sliding groove, the tilting portion is configured to reciprocate along the height direction of the sliding groove, one end, far away from the sliding sleeve, of the tilting portion is provided with a protruding block, one side, corresponding to the sliding sleeve, of the protruding block is provided with an initial surface, and one side, far away from the sliding sleeve, of the protruding block is provided with a transitional cambered surface.

3. The gearbox for a riding mower according to claim 2, wherein an angle formed between an extension axis of the gentle portion and an axis of the tilting portion is 4-6 degrees, an angle formed between an extension axis of the initial surface and an axis of the tilting portion is 40-50 degrees, and an angle formed between an axis of the transitional cambered surface and an axis of the tilting portion is 35-46 degrees.

4. The gearbox for a riding mower according to claim 1, wherein the gearbox comprises a gear box,

the number of the elastic clamping pieces is 3-5.

5. The gearbox for a riding mower according to claim 1, wherein the gearbox comprises a gear box,

the shifting fork comprises a shifting plate arranged outside the shell and a rotating shaft connected with the shifting plate and embedded in the shell, and a shifting block connected with the sliding sleeve is arranged on the rotating shaft.

6. The gearbox for a riding mower according to claim 5, wherein a sector plate is further arranged on the rotating shaft, a wavy contact surface is arranged on the sector plate, and the shell is connected with a round steel ball through an elastic piece to be abutted against the wavy contact surface.

7. The gearbox for a riding mower according to claim 6, wherein the gearbox comprises a gear box,

and a sealing ring is arranged between the elastic piece and the shell.

8. The gearbox for a riding mower according to claim 1, wherein the gearbox comprises a gear box,

the shell is provided with a ventilation valve.

9. The gearbox for a riding mower according to claim 1, wherein the gearbox comprises a gear box,

one end of the gear shifting shaft far away from the gear shifting fork axially extends to the outside of the shell and is provided with a brake structure,

the brake structure is in including setting up the brake disc of gear shift axle tip, fixed brake seat and the first brake splint of setting on the casing, the brake seat corresponds one side of brake disc is provided with the second brake splint, the second brake splint is kept away from one side of brake disc is connected with the brake and dials the board through the push rod, the brake dial board pass through reset spring with the brake seat is connected, the lateral part of brake dial board with still be connected with reset torsion spring between the brake seat.

10. A riding mower comprising a gearbox according to any one of claims 1-9.