CN216775431U

CN216775431U - Small-size agricultural machine and transmission system thereof

Info

Publication number: CN216775431U
Application number: CN202220454482.8U
Authority: CN
Inventors: 唐辉; 贺国军
Original assignee: Chongqing Zongshen General Power Machine Co Ltd
Current assignee: Chongqing Zongshen General Power Machine Co Ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-06-21
Anticipated expiration: 2032-03-04

Abstract

The utility model relates to small-sized agricultural machinery, in particular to a transmission system of the small-sized agricultural machinery, which comprises a rack, wherein a power input mechanism, a walking transmission mechanism and a farming transmission mechanism are arranged on the rack, the walking transmission mechanism and the farming transmission mechanism are in transmission connection with the power input mechanism, and a switching mechanism for controlling the on-off of power is arranged between the farming transmission mechanism and the power input mechanism. The scheme solves the problem that safety and operation convenience cannot be taken into consideration when the small and medium-sized agricultural machinery turns or turns around in the prior art.

Description

Small-size agricultural machine and transmission system thereof

Technical Field

The utility model relates to a small agricultural machine.

The utility model also relates to a transmission system of the small agricultural machine.

Background

The small agricultural machine generally refers to an agricultural machine using a small gasoline engine or a small diesel engine as a power mechanism. For small agricultural machinery with a travelling mechanism and a cultivating mechanism, the travelling mechanism and the cultivating mechanism share a set of power mechanism and transmission system, and the power is transmitted to the travelling mechanism and the cultivating mechanism through the transmission system by a small gasoline engine or a small diesel engine to realize travelling and operation. The existing small agricultural machinery usually adopts a clutch or a speed regulation gear to control the power transmission between a power mechanism and a transmission system, thereby realizing the control of the power on-off between the power mechanism and a walking mechanism as well as a tillage mechanism.

In the practical use process, the small agricultural machine can often encounter the situation of turning or turning around, and at the moment, the operation cutter needs to be separated from the ground, and then the turning or turning around is realized by utilizing the travelling mechanism. At the moment, if the power is not disconnected for turning or turning around, the operation cutter is still in a rotating state after being separated from the ground, so that the operator or surrounding articles are easily injured; however, if the power is cut off to turn or turn around, the walking mechanism completely needs an operator to move the agricultural machine after losing power, which puts high requirements on the physical strength of the operator and is easy to cause the problem of difficult turning or turning around operation of the agricultural machine.

How to improve the safety and convenience of the small agricultural machine with the walking mechanism and the cultivating mechanism when turning or turning around becomes an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a transmission system of a small agricultural machine, and aims to solve the problem that safety and operation convenience cannot be considered at the same time when the small agricultural machine turns or turns around in the prior art.

In order to achieve the above purpose, the basic scheme of the utility model provides a transmission system of a small-sized agricultural machine, which comprises a frame, wherein a power input mechanism, a walking transmission mechanism and a cultivation transmission mechanism are arranged on the frame, the walking transmission mechanism and the cultivation transmission mechanism are in transmission connection with the power input mechanism, and a switching mechanism for controlling the on-off of power is arranged between the cultivation transmission mechanism and the power input mechanism.

The beneficial effect of this basic scheme lies in: by adopting the arrangement, when the small-sized agricultural machine turns or turns around, the tillage transmission mechanism loses power by controlling the switching mechanism, and the walking transmission mechanism is not influenced, so that the operation of turning or turning around can be easily realized, the operation convenience is improved, the potential safety hazard caused by the rotation of the tillage cutter can be avoided, and the safety is improved.

In order to further improve the safety and convenience of the small agricultural machine during turning or turning around, the switching mechanism is a clutch type switching mechanism.

In order to further improve the safety and the convenience when the small-sized agricultural machine turns or turns around, the power input mechanism comprises a power input gear, the farming transmission mechanism comprises a farming transmission shaft, the switching mechanism comprises a shifting block connected with the farming transmission shaft through a spline, and the switching mechanism further comprises a control assembly used for controlling the shifting block to be in clutch fit with the power input gear. When the shifting block is combined with the power input gear, the power input mechanism transmits power to the tillage transmission shaft, and finally the power is transmitted to the tillage cutter for rotation operation; when the shifting block is separated from the power input gear, the power transmission between the power input mechanism and the tillage transmission shaft is cut off, so that the tillage transmission shaft loses power and the tillage cutters stop rotating.

Further, the power input gear is sleeved on the cultivation transmission shaft in an empty mode. With this arrangement, the power cutoff operation is facilitated.

Further, the control assembly comprises a shifting fork connected with the shifting block, and the shifting fork is movably connected with the rack.

Further, the control assembly further comprises a driving shaft, the driving shaft is in sliding connection with the rack along an axial direction parallel to the cultivation transmission shaft, and the shifting fork is statically connected with the driving shaft.

Further, the control assembly also comprises an elastic piece which enables the shifting block to be kept in a combined state with the power input gear.

Further, the elastic member is sleeved on the driving shaft.

Further, the control assembly also comprises a control arm which is hinged with the frame and is used for driving the driving shaft to slide.

Furthermore, the control arm is connected with a pull wire.

Correspondingly, the utility model also provides a small agricultural machine which is safe and convenient to operate when turning around.

In order to achieve the above object, a small agricultural machine includes the transmission system of any one of the above.

Drawings

FIG. 1 is a schematic view of an embodiment of a small agricultural machine according to the present invention;

fig. 2 is a cross-sectional view of the transmission system a-a of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the power transmission system 1, the operating handle 2, the frame 11, the walking transmission mechanism 12, the farming transmission mechanism 14, the power input gear 15, the control arm 131, the pull wire 132, the elastic member 133, the driving shaft 134, the shift fork 135, the shift block 136, the farming transmission shaft 141, the chain 142 and the farming output shaft 143.

The embodiment is basically as shown in the attached figures 1 and 2: a small agricultural machine comprises a bracket, an engine is arranged on the bracket, the engine is preferably a small gasoline engine, and can be a small diesel engine; the support is provided with a transmission system 1, a clutch is arranged between the transmission system 1 and the engine, and power on-off control between the engine and the transmission system 1 is realized through the clutch. Still install operating handle 2 on the support, make things convenient for the operator to operate agricultural machine through operating handle 2. The transmission system 1 is provided with road wheels and farming tools.

The transmission system 1 comprises a frame 11, a power input mechanism, a walking transmission mechanism 12 and a farming transmission mechanism 14 are arranged on the frame 11, and the walking transmission mechanism 12 and the farming transmission mechanism 14 are in transmission connection with the power input mechanism. The power of the engine is transmitted to the transmission system 1 through the connection of the power input mechanism and the clutch, the power is transmitted to the traveling wheels through the traveling transmission mechanism 12, and the power is transmitted to the cultivating cutters through the cultivating transmission mechanism 14. Specifically, frame 11 generally has a rigid housing structure, so as to both support the components of transmission system 1 and prevent them from being exposed to the outside and being susceptible to foreign objects. The cultivation transmission mechanism 14 comprises a cultivation transmission shaft 141 and a cultivation output shaft 143, the cultivation transmission shaft 141 and the cultivation output shaft 143 are both rotatably connected with the frame 11, and the cultivation transmission shaft 141 and the cultivation output shaft 143 are mechanically connected through a chain wheel 142. The power input mechanism comprises a power input gear 15, and the power input gear 15 obtains the power of the engine from the clutch. In this embodiment, the power input gear 15 is freely sleeved on the cultivation transmission shaft 141, so that the power input gear 15 and the cultivation transmission shaft 141 can rotate relatively.

A switching mechanism for controlling the on-off of the power is arranged between the cultivation transmission mechanism 14 and the power input mechanism. In this embodiment, the switching mechanism is a clutch type switching mechanism, and specifically, the switching mechanism includes a shifting block 136 spline-connected to the cultivation transmission shaft 141, and a first coupling portion is fixedly provided at one end of the shifting block 136 facing the power input gear 15. A second combining part which is in concave-convex fit with the first combining part is fixedly arranged on one side of the power input gear 15 facing the shifting block 136, and power transmission between the shifting block 136 and the power input gear 15 is realized through combination of the first combining part and the second combining part; by separating the first and second coupling portions, the power transmission between the dial 136 and the power input gear 15 is disconnected.

Switching mechanism still carries out separation and reunion complex control assembly including being used for controlling shifting block 136 and power input gear 15, in this embodiment, control assembly includes the shift fork 135 of being connected with shifting block 136, the preferred mode that adopts the joint of being connected between shift fork 135 and the shifting block 136, specifically, the joint portion that has the bayonet socket on the shift fork 135, annular recess has on the shifting block 136, shift fork 135 passes through joint portion joint in the recess, thereby realize that shift fork 135 can drive shifting block 136 and remove, simultaneously can rotate relatively between shifting block 136 and the shift fork 135. The shifting fork 135 is movably connected with the frame 11, in this embodiment, a driving shaft 134 is connected and fixed on the shifting fork 135, and one end of the driving shaft 134, which is far away from the shifting fork 135, penetrates through the frame 11 along an axial direction parallel to the cultivation transmission shaft 141 and is slidably connected with the frame 11, so that the shifting fork 135 is moved by the sliding of the driving shaft 134. Of course, the shifting fork 135 may also be connected to the frame 11 in another movable connection manner, such as hinged connection, and the shifting fork 135 rotates around a hinged point with the frame 11 to also achieve the effect that the shifting fork 135 drives the shifting block 136 to move.

The control assembly further includes an elastic member 133 for keeping the shifting block 136 and the power input gear 15 in a combined state, the elastic member 133 is preferably a spring, in this embodiment, the elastic member 133 is located outside the rack 11 and is sleeved on the driving shaft 134, one end of the elastic member 133 abuts against the rack 11, and the other end of the elastic member 133 abuts against the end of the driving shaft 134, so that the driving shaft 134 keeps a tendency of sliding toward the outside of the rack 11 under the elastic action of the elastic member 133, and the shifting fork 135 drives the shifting block 136 and the power input gear 15 to keep in a combined state. Of course, the elastic element 133 can be disposed at another position, for example, it can be sleeved on the cultivation transmission shaft 141 to keep the shifting block 136 and the power input gear 15 in a combined state.

The control assembly further comprises a control arm 131 hinged to the frame 11 for sliding the driving shaft 134, in this embodiment, preferably, one end of the control arm 131 is hinged to the frame 11, and the middle of the control arm 131 is hinged to the end of the driving shaft 134, so that the driving shaft 134 is moved by the control arm 131 rotating around the hinge point with the frame 11. The control arm 131 is connected with a pull wire 132 for pulling the control arm 131 to rotate, and an operating end of the pull wire 132 is mounted on the operating handle 2 of the agricultural machine, so that an operator can conveniently control the control arm 131 through the pull wire 132.

The specific implementation process is as follows: in a normal state, the power of the engine is transmitted to a power input mechanism of the transmission system 1 through a clutch, so that the power input gear 15 keeps a rotating state; the shifting block 136 is kept in a combined state with the power input gear 15 under the action of the control assembly, and at the moment, the power of the power input gear 15 is transmitted to the cultivation transmission shaft 141 through the shifting block 136, so that the cultivation output shaft 143 obtains power to drive the cultivation cutter to rotate to realize cultivation operation; meanwhile, the power of the power input mechanism is transmitted to the walking transmission mechanism 12, so that the walking wheels also obtain power to rotate. When the agricultural machine turns or turns around, and the tillage tools leave the ground, the operator pulls the control arm 131 to rotate through the pull wire 132, so that the control arm 131 drives the driving shaft 134 to slide and compress the elastic element 133, the driving shaft 134 drives the shifting fork 135 to move when sliding, the shifting fork 135 drives the shifting block 136 to move towards the direction far away from the power input gear 15, thereby separating the dial 136 from the power input gear 15, disconnecting the power transmission between the power input gear 15 and the cultivating transmission shaft 141, thereby the tillage cutter loses power and stops rotating, thereby reducing the potential safety hazard when the agricultural machine turns or turns around, and simultaneously, because the power transmission between the walking transmission mechanism 12 and the power input mechanism is not disconnected, the walking wheels can still obtain power to rotate, the turning or turning operation is convenient, and the turning or turning operation of the small agricultural machine can be safe and convenient.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides a transmission system of small-size agricultural machine, includes the frame, be provided with power input mechanism, walking drive mechanism and farming drive mechanism in the frame, walking drive mechanism and farming drive mechanism all are connected with power input mechanism transmission, its characterized in that: and a switching mechanism for controlling the on-off of power is arranged between the cultivation transmission mechanism and the power input mechanism.

2. The transmission system of a small agricultural machine according to claim 1, wherein: the switching mechanism is a clutch type switching mechanism.

3. The transmission system of a small agricultural machine according to claim 2, wherein: the power input mechanism comprises a power input gear, the farming transmission mechanism comprises a farming transmission shaft, the switching mechanism comprises a shifting block in splined connection with the farming transmission shaft, and the switching mechanism further comprises a control assembly used for controlling the shifting block to be in clutch fit with the power input gear.

4. A transmission system for a small agricultural machine, according to claim 3, wherein: the power input gear is sleeved on the cultivation transmission shaft in an empty mode.

5. A transmission system for a small agricultural machine, according to claim 3 or 4, wherein: the control assembly comprises a shifting fork connected with the shifting block, and the shifting fork is movably connected with the rack.

6. The transmission system of a small agricultural machine according to claim 5, wherein: the control assembly further comprises a driving shaft, the driving shaft is in sliding connection with the rack along the axial direction parallel to the cultivation transmission shaft, and the shifting fork is statically connected with the driving shaft.

7. The transmission system of a small agricultural machine according to claim 6, wherein: the control assembly further comprises an elastic piece which enables the shifting block to be kept in a combined state with the power input gear.

8. The transmission system of a small agricultural machine according to claim 7, wherein: the elastic piece is sleeved on the driving shaft.

9. A transmission system for a small agricultural machine, according to claim 6, 7 or 8, wherein: the control assembly further comprises a control arm which is hinged with the rack and used for driving the driving shaft to slide.

10. The transmission system of a small agricultural machine according to claim 9, wherein: the control arm is connected with a pull wire.

11. The small agricultural machine transmission system according to claim 10, wherein: the farming transmission mechanism also comprises a farming output shaft, and the farming output shaft is connected with the farming transmission shaft through a chain wheel and chain mechanism.

12. A small agricultural machine, characterized by: comprising a transmission system according to any one of claims 1 to 11.