CN206036146U - Gearbox and farm machinery thereof - Google Patents

Abstract

The utility model provides a gearbox, which comprises a power input shaft, an intermediate output shaft, a gear shift mechanism, and left and right half shafts. The gear shift mechanism is connected between the power input shaft and the intermediate output shaft. A drive wheel and an output gear are installed on the top, and a set of drive wheels is set between the intermediate output shaft and the left and right half shafts, and the intermediate output shaft makes the drive wheel rotate forward or reverse through the two transmission paths of the drive wheel set. . One transmission path of the transmission wheel set makes the driving wheel rotate forward, and the other makes the driving wheel reverse; the driving wheel on one of the half shafts is braked, and the driving wheel on the other half shaft rotates forward to realize the turn; the driving wheel on one of the half shafts The wheel is counter-rotated, and the drive wheel on the other half-axis rotates forward to realize turning in situ. It is not easy to sag when turning in place in forward and reverse directions; when unilateral braking in situ has caused the crawler to sag, the use of in situ steering can solve the predicament of track sag. Able to adapt to the environment of small plots.

Description

A gearbox and its agricultural machinery

technical field

The utility model belongs to the technical field of agricultural machinery, in particular to a gearbox and the agricultural machinery.

Background technique

Crawler vehicles are widely used in southern paddy fields due to their large grounding area, small grounding specific pressure, good cross-ditch performance, and low damage to farmland and roads; crawler vehicles usually walk on the ground with two tracks. When there is a speed difference between the two crawlers during driving, the tracked vehicle will deflect to the side with the lower speed to realize the steering of the tracked vehicle. The tracked vehicle on the rice field operation machinery is usually driven by a mechanical transmission due to cost considerations. During the steering process, only one side of the track can be braked after separation, while the other side of the track continues to drive.

Because there are many paddy fields in the hilly and mountainous areas of the southwest, farming and harvesting machines with traditional unilateral brake steering are prone to subsidence when turning in paddy fields, and the steering consumes a lot of power. The terrain of hilly and mountainous areas is mainly mountains and hills, and the plots are small. The turning radius of traditional models is relatively large, so it is not suitable for use in small plots.

Utility model content

In view of the above, the purpose of this utility model is to provide a gearbox with a small turning radius, which is convenient for steering and turning in place in a small plot.

In order to achieve the above-mentioned purpose and other related purposes, the technical scheme of the utility model is as follows:

A gearbox, including a power input shaft, an intermediate output shaft, a shifting transmission mechanism, and left and right half shafts, the shifting transmission mechanism is connected between the power input shaft and the intermediate output shaft, and driving wheels are installed on the left and right half shafts and an output gear, a set of transmission wheels is respectively arranged between the intermediate output shaft and the left and right half shafts, and the intermediate output shaft makes the drive wheel rotate forward or reverse through the two transmission paths of the transmission wheels.

With the above-mentioned structure, the power is transmitted from the power input shaft to the intermediate output shaft after being shifted through the gear shifting mechanism, and the gears are switched through the gear shifting mechanism. The driving wheel is reversed; the driving wheel on one of the half shafts is braked, and the driving wheel on the other half shaft is turned forward; the driving wheel on one of the half shafts is reversed, and the driving wheel on the other half shaft is turned forward to realize the original Turn sharply. Since the left and right half shafts can realize positive and negative rotation through the transmission wheel set, the forward and reverse in-situ steering is not easy to sink; when the unilateral braking in-situ steering has caused the crawler to sink, the in-situ steering can relieve the crawler from sinking. When turning on the spot, both sides of the track are in the walking state, and the steering power consumption is small.

As a preference: the transmission wheel set includes a first transmission gear, a second transmission gear, a clutch mechanism and a triple gear, the first transmission gear and the second transmission gear are idling on the intermediate output shaft, and the clutch mechanism is installed on the intermediate output shaft shaft, and located between the first transmission gear and the second transmission gear, the triple gear is installed on the intermediate half shaft, and meshes with the output gear and the second transmission gear, and the first transmission gear and the triple gear are provided with Idler.

Preferably: the intermediate gear of the triple gear meshes with the output gear, the idler gear meshes with the first transmission gear and the left gear of the triple gear to form a first transmission path, and the second transmission gear meshes with the right gear of the triple gear Engage to form the second transmission path.

As a preference: the clutch mechanism is a jaw clutch.

As a preference: a friction disc clutch is also arranged on the left and right half shafts.

As a preference: a drive gear is installed on the power input shaft, a transmission gear is installed on the intermediate output shaft, and the gear shift mechanism includes a first triple gear fixedly installed on the first transmission shaft and a second triple gear that is rotatably installed on the second transmission shaft. The second triple gear on the transmission shaft and meshed with the first triple gear, the driven gear is installed on the first transmission shaft, the driven gear is meshed with the driving gear, the second triple gear and the transmission gears meshing.

The utility model also provides an agricultural machine, including the above-mentioned gearbox.

The beneficial effect of the utility model is that: forward and reverse rotation in situ steering is not easy to sink; when unilateral braking in situ steering has caused crawler belts to sink, using the in situ steering mode can relieve the crawler belt from sinking. When turning on the spot, both sides of the track are in the walking state, and the steering power consumption is small. The agricultural machinery that turns on the spot has no turning radius and is suitable for use in smaller plots in the southwestern hills and mountainous areas.

Description of drawings

Fig. 1 is a transmission principle diagram of the embodiment of the utility model.

Part number description

1 PTO shaft

2 driving gear

3 first drive shaft

4 driven gear

5 first triple gear

6 Second drive shaft

7 Second triple gear

8 drive gear

9 Intermediate output shaft

10 clutch mechanism

11 First drive gear

12 Second drive gear

13 idler shaft

14 idler

15 intermediate half shaft

16 triple gear

17 left half shaft

18 left output gear

19 left drive wheel

20 Left friction clutch

21 Right half shaft

22 Right output gear

23 Right drive wheel

24 Right friction disc clutch

detailed description

The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model.

Example

As shown in Figure 1, a gearbox includes a power input shaft 1, an intermediate output shaft 9, a shifting transmission mechanism, a left half shaft 17 and a right half shaft 21, and the shifting transmission mechanism is connected between the power input shaft 1 and the middle Between the output shafts 9, left output gear 18, left friction disc clutch 20 and left drive wheel 19 are installed on the left half shaft 17, and right output gear 22, right friction disc clutch 24 and right output gear 22 are installed on the right half shaft 21. Drive wheel 23. Between the intermediate output shaft 9 and the left half-shaft 17 and between the intermediate output shaft 9 and the right half-shaft 21, a set of transmission wheels is arranged, and the transmission wheels have two transmission paths, through which the left drive wheel 19 And right drive wheel 23 forward or counterclockwise. In this way, the left drive wheel 19 has two rotation modes, forward rotation and reverse rotation, and the right drive wheel 23 also has two rotation modes of forward rotation and reverse rotation. The driving wheels on one half shaft rotate forward to realize turning; the driving wheels on one of the half shafts rotate counterclockwise, and the driving wheels on the other half shaft rotate forward to realize turning in situ.

Further, the driving gear 2 is installed on the power input shaft 1, the transmission gear 8 is installed on the intermediate output shaft 9, and the gear shift mechanism includes the first triple gear 5 fixedly installed on the first transmission shaft 3 and the rotating The second triple gear 7 installed on the second transmission shaft 6, the second triple gear 7 meshes with the first triple gear 5, and the first triple gear 5 is connected with the first transmission shaft 3 through splines to realize the transmission Push-pull shifting, which has 3 forward gears and 2 neutral gears, the second triple gear 7 is idly sleeved on the second transmission shaft 6, and the second transmission shaft 6 is idling, and the second triple gear 7 is respectively connected with the first The triple gear 5 meshes to realize gear shifting. A driven gear 4 is installed on the first transmission shaft 3 , and the driven gear 4 meshes with the driving gear 2 , and the intermediate gear of the second triple gear 7 meshes with the transmission gear 8 to transmit power to the intermediate output shaft 9 .

Since the left and right transmission wheel sets have the same structure, in this example, the left transmission wheel set is used as an example for illustration. The transmission wheel set includes the first transmission gear 11, the second transmission gear 12, the clutch mechanism 10 and the triple gear 16 wheels. The first transmission gear 11 and the second transmission gear 12 are sleeved on the intermediate output shaft 9, the clutch mechanism 10 is installed on the intermediate output shaft 9, and is located between the first transmission gear 11 and the second transmission gear 12, for The power on the intermediate output shaft 9 is transmitted to the first transmission gear 11 or the second transmission gear 12, and the triple gear 16 is installed on the intermediate half shaft 15, and the intermediate gear of the triple gear 16 meshes with the left output gear 18, and the triple gear 16 The right gear meshes with the second transmission gear 12. An idler 14 is arranged between the first transmission gear 11 and the triple gear 16. The idler 14 is installed on the idler shaft 13. The idler 14 is connected to the first transmission gear 11 and the triple gear. 16's left gear meshes. Wherein, the first transmission gear 11, the idler gear 14, the triple gear 16 and the left output gear 18 form the first transmission path, the second transmission gear 12, the triple gear 16 and the left output gear 18 form the second transmission path, two The transmission path makes the rotation direction of the left half shaft 17 opposite, so that forward and reverse rotation can be realized.

In this example, the clutch mechanism 10 is a dog clutch, which rotates synchronously with the intermediate output shaft 9. The dog clutch has three working gears, which are forward gear, neutral gear and reverse gear.

An agricultural machine includes the above-mentioned gearbox.

The working principle of the utility model is as follows: the engine power is transmitted to the gearbox through the power input shaft 1, and is transmitted to the intermediate output shaft 9 through the first transmission shaft 3 and the second transmission shaft 6. The jaw clutch on the side meshes with the first transmission gear 11 on the left side and the first transmission gear on the right side respectively. After transmission, the left driving wheel 19 and the right driving wheel 23 on the left half shaft 17 and the right half shaft 21 are all positive. change.

Taking left turning as an example, when turning with one-sided braking, the jaw clutch on the left is disengaged from the first transmission gear 11, and is in the idling gear position, the intermediate half shaft 15 and the left half shaft 17 have no transmission, and the left friction plate clutch 20 lock the left output gear 18, the right transmission line remains unchanged, and the right drive wheel 23 rotates forward, then the left track rotates with the left drive wheel 19 as the center of circle, and the right drive wheel 23 of the right track takes the left drive wheel 19 as the center of circle. Circular movement, so as to realize unilateral braking and turn left.

Also take the left turn as an example, when turning in situ, the jaw clutch on the left side meshes with the first left transmission gear 11, the first transmission gear 11 meshes with the left gear of the triple gear 16 through the left idler gear 14, and the triple gear 16 drives To the left output gear 18, it drives the left drive wheel 19 to reverse, the right drive route remains unchanged, and the right drive wheel 23 rotates forward, thereby realizing turning left in situ. The principle of turning right is the same as the above-mentioned principle, and will not be repeated here.

In the utility model, it is not easy to sag when turning in situ in forward and reverse directions; when unilateral braking in situ has caused the crawler to sag, the in situ steering can be used to relieve the sagging predicament of the crawler. When turning on the spot, both sides of the track are in the walking state, and the steering power consumption is small. The agricultural machinery that turns on the spot has no turning radius and is suitable for use in smaller plots in the southwestern hills and mountainous areas.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Any person familiar with the technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (7)

1. a kind of change speed gear box, including power input shaft, intermediate output shaft, shift speed change mechanism, left and right semiaxis, the shift speed change Mechanism driving is connected between power input shaft and intermediate output shaft, is provided with driving wheel and output gear on the semiaxis of left and right, its It is characterised by：One group of driving wheel group is respectively arranged between the intermediate output shaft and left and right semiaxis, and the intermediate output shaft leads to Two drive paths for crossing driving wheel group make driving wheel forward or reverse.

2. a kind of change speed gear box according to claim 1, it is characterised in that：The driving wheel group include the first travelling gear, Second travelling gear, clutch and triple gear, first travelling gear and the second travelling gear empty set are in middle output On axle, clutch is arranged on intermediate output shaft, and is located between the first travelling gear and the second travelling gear, triple gear On intermediate axle shaft, and engage with output gear and the second travelling gear, first travelling gear and triple gear it Between be provided with idle pulley.

3. a kind of change speed gear box according to claim 2, it is characterised in that：The idler gear and output gear of the triple gear Wheel engagement, the idle pulley are engaged with the left gear of the first travelling gear and triple gear, the first drive path of formation, and described second Travelling gear is engaged with the right gear of triple gear, forms the second drive path.

4. a kind of change speed gear box according to claim 2, it is characterised in that：The clutch is jaw clutch.

5. a kind of change speed gear box according to claim 2, it is characterised in that：Friction disk type is additionally provided with the left and right semiaxis Clutch.

6. a kind of change speed gear box according to claim 1, it is characterised in that：Driving tooth is installed on the power input shaft Wheel, is provided with travelling gear on intermediate output shaft, the shift speed change mechanism includes being fixedly mounted on the first power transmission shaft the One triple gear and be rotatably installed on second driving shaft and the second triple gear for engaging with the first triple gear, described Driven gear is installed on one power transmission shaft, the driven gear is engaged with driving gear, second triple gear and travelling gear Engagement.

7. a kind of farm machinery, including a kind of change speed gear box described in claim 1-6 any one.