CN211715678U

CN211715678U - Gear box

Info

Publication number: CN211715678U
Application number: CN202020089260.1U
Authority: CN
Inventors: 冯军
Original assignee: Chongqing Chenye Agricultural Technology Co ltd
Current assignee: Chongqing Chenye Agricultural Technology Co ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-10-20
Anticipated expiration: 2030-01-16

Abstract

The invention discloses a gearbox which is characterized by comprising a box body, an input shaft, a first output shaft and a second output shaft, wherein the box body is integrally in an inverted V shape in the axial direction; the input shaft is connected with the first output shaft and the second output shaft through gears in a transmission mode respectively. The invention has the advantages of compact structure, small volume, light weight, stable power transmission, capability of adapting to various operation requirements, contribution to reducing labor intensity, improving operation efficiency and the like.

Description

Gear box

Technical Field

The invention relates to the technical field of gearboxes, in particular to a gearbox.

Background

In recent years, with the upgrading of the industry in China and the acceleration of the progress of agricultural mechanization and modernization, agricultural machines such as cultivators and small harvesters have entered thousands of households as a mechanical device which can greatly improve the working efficiency, reduce the labor intensity and reduce the operation cost. The power is output by an engine crankshaft, the power output by the engine crankshaft is transmitted and converted by a power input shaft of a gearbox to generate rotating speeds adaptive to different gears, and then the power is transmitted to a working device or a travelling mechanism by a power output shaft of the gearbox so as to realize corresponding operation or travelling action.

The four-wheel drive cultivator in the prior art usually has a neutral gear, more than two forward gears and a reverse gear, and compared with the traditional two-wheel drive cultivator, the cultivator can realize the effect that one power output shaft cultivates and the other power output shaft walks. However, the existing four-wheel drive cultivator has a complex box structure, a large and heavy gearbox body and higher manufacturing cost. And the existing four-wheel drive cultivator has the defects of heavy weight of the whole cultivator, high gravity center, heavy load during operation, difficult deep ploughing, difficult manipulation and labor waste during transition, thereby reducing the production efficiency, increasing the labor intensity, shortening the service life of the whole cultivator and increasing the operation cost.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a compact structure, small, light in weight, power transmission is steady, can adapt to multiple operation requirement, is favorable to reducing intensity of labour, improves the gearbox of operating efficiency.

In order to solve the technical problems, the invention adopts the following technical scheme:

a gearbox is characterized by comprising a box body which is integrally inverted V-shaped in the axial direction, and an input shaft, a first output shaft and a second output shaft which are rotatably arranged on the box body, wherein the input shaft is positioned in the middle of the upper part of the box body, and the first output shaft and the second output shaft are respectively positioned at the lower parts of two sides of the box body; the input shaft is connected with the first output shaft and the second output shaft through gears in a transmission mode respectively.

In the structure, the box body is arranged to be in an inverted V shape, the input shaft is arranged at the higher middle position on the box body, the input shaft is connected with the engine conveniently, the first output shaft and the second output shaft are arranged at the lower two side positions on the box body, and the first output shaft and the second output shaft are connected with the traveling system or the farming system conveniently. And because the box is the shape of falling V, can enough make things convenient for the arrangement of transmission shaft on the box, make the compact structure of gearbox, reduce the volume, reduce weight, can also make the whole focus of gearbox move down, improve the stability of farming, make power transmission more steady, multiple operation needs such as adaptation transition, and then reduce intensity of labour, improve the operating efficiency. Because two power output shafts are arranged, the power output shaft with higher rotating speed can be used for farming during farming, the power output shaft with lower rotating speed is used for walking, the whole machine can move stably during farming, an operator does not need to additionally apply driving force, and the labor intensity of the operator is greatly reduced.

Furthermore, a driving gear which is arranged in a spline fit manner is sleeved on the input shaft in an axially movable manner; the box body is further provided with a gear shifting control mechanism, the gear shifting control mechanism is provided with a shifting fork matched with the driving gear, and the driving gear can move axially along the input shaft under the action of the shifting fork to realize gear shifting operation.

Furthermore, the gear shifting control mechanism comprises a gear shifting shaft which is axially and telescopically arranged on the box body, the gear shifting shaft is parallel to the input shaft, and the shifting fork is fixedly arranged on the gear shifting shaft.

Furthermore, the gear shifting control mechanism also comprises a gear shifting sleeve arranged on the box body, and the gear shifting shaft is movably arranged in the gear shifting sleeve in a penetrating way; the gear shifting sleeve is provided with a threaded hole arranged along the radial direction, the threaded hole is sequentially provided with a steel ball, a spring and an adjusting bolt from inside to outside, and the steel ball is pressed on the gear shifting shaft; and a plurality of annular grooves corresponding to gears are axially arranged on the gear shifting shaft, so that the gear shifting box is in the corresponding gear when the annular grooves move to the positions of the steel balls.

After shifting, the steel balls are pressed into the annular groove under the action of the spring, so that the shifting shaft is prevented from axially moving when the machine shakes or the load is increased, and the running stability is improved.

Furthermore, the driving gear is a duplicate gear, and two gears on the duplicate gear are arranged at intervals; the shifting fork is clamped between the two gears of the driving gear.

Therefore, the driving gear moves on the input shaft through the shifting fork of the gear shifting control mechanism, and the two gears on the driving gear are sequentially meshed with the transmission gears on the two sides, so that first-gear transmission and second-gear transmission can be realized; and when the gap between the two gears on the driving gear corresponds to the transmission gears on the two sides, a neutral gear is formed. Therefore, the first gear, the neutral gear and the second gear can be realized by utilizing the input shaft, when the gearbox is used on a four-wheel drive type mini-tiller, the first gear can transmit larger torque due to low rotating speed, the first gear can be used as a tillage gear, and the second gear cannot bear larger load due to high rotating speed, so that the gearbox can be used during transition, and the transition time is saved.

Furthermore, a first intermediate shaft and a second intermediate shaft are sequentially arranged between the input shaft and the first output shaft, and a first transmission gear set is arranged among the input shaft, the first intermediate shaft, the second intermediate shaft and the first output shaft; and a third intermediate shaft and a fourth intermediate shaft are sequentially arranged between the input shaft and the second output shaft, and a second transmission gear set is arranged among the input shaft, the third intermediate shaft, the fourth intermediate shaft and the second output shaft.

Therefore, two intermediate shafts are arranged between the input shaft and the first output shaft as well as between the input shaft and the second output shaft, power transmission of three-level speed change can be realized, power output is stable no matter the power transmission works in a low-rotation-speed farming gear or a high-rotation-speed walking gear, impact on each part and an external execution mechanism is small, and smoothness of power transmission is guaranteed.

Further, the box includes two half boxes of the mutual lock of axial, the edge of half box is formed with the flange along radially outwards outstanding, two the flange of half box has the mounting hole that corresponds the setting along the circumference equipartition, two half box is through the bolt fixed connection who passes the mounting hole.

Furthermore, the top of the box body is a plane which is horizontally arranged, and the flange which is positioned on the plane is provided with a plurality of mounting holes which are horizontally arranged.

Like this, set the top of box to the horizontal plane, can reduce gearbox longitudinal dimension, can be used for the mould assembling of two half boxes through a plurality of mounting holes that set up along the horizontal direction in addition, can be used for external operating device again or install engine fixed bolster. When the engine fixing bracket is used for mounting the engine fixing bracket, the gravity center of the whole engine can be reduced, and the stability of the whole engine is further improved.

In conclusion, the invention has the advantages of compact structure, small volume, light weight, stable power transmission, capability of adapting to various operation requirements, contribution to reducing labor intensity, improving operation efficiency and the like.

Drawings

Fig. 1 is an axial structural view of a transmission.

Fig. 2 is a schematic cross-sectional view of a-a in fig. 1.

Fig. 3 is a schematic top view of the structure of fig. 1.

Fig. 4 is a side view of the structure of fig. 1.

Fig. 5 is a schematic diagram of a specific shifting structure in the present embodiment.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the specific implementation: as shown in fig. 1 to 4, a transmission includes a casing 1 that is integrally inverted V-shaped in an axial direction, an input shaft 2, a first output shaft 3, and a second output shaft 4 that are rotatably mounted on the casing 1, the input shaft 2 being located at a middle position above the casing 1, the first output shaft 3 and the second output shaft 4 being located at positions below two sides of the casing 1, respectively; the input shaft 2 is connected with the first output shaft 3 and the second output shaft 4 through gear transmission respectively.

When in implementation, the input shaft 2 is sleeved with a driving gear 5 which is arranged in a spline fit manner in an axially movable manner; the box 1 is further provided with a gear shifting control mechanism 6, the gear shifting control mechanism 6 is provided with a shifting fork 61 matched with the driving gear 5, and the driving gear 5 can move axially along the input shaft 2 under the action of the shifting fork 61 to realize gear shifting operation.

In practice, the shift control mechanism 6 includes a shift shaft 62 axially telescopically mounted on the housing 1, the shift shaft 62 is arranged in parallel with the input shaft 2, and the fork 61 is fixedly mounted on the shift shaft 62.

In practice, the shift operating mechanism 6 further includes a shift sleeve 63 mounted on the housing 1, and the shift shaft 62 is movably mounted in the shift sleeve 63; the gear shifting sleeve 63 is provided with a threaded hole arranged along the radial direction, and the threaded hole is sequentially provided with a steel ball, a spring and an adjusting bolt (not shown in the figure) from inside to outside, and the steel ball is pressed on the gear shifting shaft 62; the gear shifting shaft 62 is provided with a plurality of annular grooves corresponding to gears along the axial direction, so that the gear shifting box is in the corresponding gear when the annular grooves move to the positions of the steel balls.

When the device is implemented, the driving gear 5 is a duplicate gear, and two gears on the duplicate gear are arranged at intervals; the shifting fork 61 is clamped between two gears of the driving gear 5.

In implementation, a first intermediate shaft 7 and a second intermediate shaft 8 are sequentially arranged between the input shaft 2 and the first output shaft 3, and a first transmission gear set is arranged among the input shaft 2, the first intermediate shaft 7, the second intermediate shaft 8 and the first output shaft 3; and a third intermediate shaft 9 and a fourth intermediate shaft 10 are sequentially arranged between the input shaft 2 and the second output shaft 4, and a second transmission gear set is arranged between the input shaft 2, the third intermediate shaft 9, the fourth intermediate shaft 10 and the second output shaft 4.

During implementation, the box 1 includes two half boxes of the mutual lock of axial, the edge of half box is formed with the flange along radially outwards outstanding, two the flange of half box has the mounting hole that corresponds the setting along the circumference equipartition, two half box is through the bolt fixed connection who passes the mounting hole.

In practice, the top of the box body 1 is a horizontal plane, and the flange on the horizontal plane is provided with a plurality of mounting holes arranged along the horizontal direction.

In the present embodiment, as shown in fig. 5, the shift shaft 62 has annular grooves corresponding to four gears, 62a, 62b, 62c and 62d in sequence; the duplicate gears on the driving gear 5 are a gear 5a and a gear 5b respectively; the first intermediate shaft 7 is provided with a gear 7a capable of being meshed with the gear 5b on the intermediate shaft; the third intermediate shaft 9 has a gear 9a capable of meshing with the gear 5b, and a gear 9b capable of meshing with the gear 5 a.

When the double-idle gear is in work, the gear shifting shaft 62 is pulled to drive the shifting fork 61 to enable the driving gear 5 to move along the input shaft 2, and when the steel balls are pressed into the annular groove 62a, the gear 5a and the gear 5b are not meshed with the gear 7a, the gear 9a and the gear 9b, so that double-idle gears are formed. When the steel balls are pressed into the annular groove 62b, the gear 5b is meshed with the gear 9a, and power is transmitted out through the second output shaft 4 to form a walking gear. When the steel balls are pressed into the annular groove 62c, the gear 5b is simultaneously connected with the gear 7a and the gear 9a, and power is transmitted out through the first output shaft 3 and the second output shaft 4 to form a fast gear. When the steel balls are pressed into the annular groove 62d, the gear 5b is meshed with the gear 7a, the gear 5a is meshed with the gear 9b, and power is transmitted out through the first output shaft 3 and the second output shaft 4 to form a slow gear.

The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The gearbox is characterized by comprising a box body (1) which is integrally inverted V-shaped in the axial direction, and an input shaft (2), a first output shaft (3) and a second output shaft (4) which are rotatably arranged on the box body (1), wherein the input shaft (2) is positioned in the middle of the upper side of the box body (1), and the first output shaft (3) and the second output shaft (4) are respectively positioned in the lower positions of the two sides of the box body (1); the input shaft (2) is connected with the first output shaft (3) and the second output shaft (4) through gear transmission respectively.

2. A gearbox according to claim 1, characterised in that the input shaft (2) is axially displaceably journalled with a driving gear (5) arranged by means of a spline fit; still install on box (1) and shift control mechanism (6), shift control mechanism (6) go up have with shift fork (61) that driving gear (5) cooperation set up, make driving gear (5) can be in the effect of shift fork (61) is followed the axial displacement of input shaft (2) realizes the operation of shifting gears.

3. The gearbox according to claim 2, characterized in that the shift operating mechanism (6) comprises a shift shaft (62) mounted axially telescopically on the casing (1), the shift shaft (62) being arranged parallel to the input shaft (2), the shift fork (61) being fixedly mounted on the shift shaft (62).

4. A gearbox according to claim 3 in which the shift operating mechanism (6) further comprises a shift collar (63) mounted on the housing (1), the shift shaft (62) being movably mounted in the shift collar (63); the gear shifting sleeve (63) is provided with a threaded hole which is arranged along the radial direction, the threaded hole is sequentially provided with a steel ball, a spring and an adjusting bolt from inside to outside, and the steel ball is pressed against the gear shifting shaft (62); a plurality of annular grooves corresponding to gears are axially arranged on the gear shifting shaft (62), so that the gear shifting box is in the corresponding gear when the annular grooves move to the positions of the steel balls.

5. A gearbox according to claim 2 wherein the drive gear (5) is a duplicate gear and the two gears on the duplicate gear are spaced apart; the shifting fork (61) is clamped between the two gears of the driving gear (5).

6. A gearbox according to claim 1, characterised in that a first intermediate shaft (7) and a second intermediate shaft (8) are arranged in sequence between the input shaft (2) and the first output shaft (3), and that a first transmission gear set is arranged between the input shaft (2), the first intermediate shaft (7), the second intermediate shaft (8) and the first output shaft (3); and a third intermediate shaft (9) and a fourth intermediate shaft (10) are sequentially arranged between the input shaft (2) and the second output shaft (4), and a second transmission gear set is arranged between the input shaft (2), the third intermediate shaft (9), the fourth intermediate shaft (10) and the second output shaft (4).

7. The gearbox according to claim 1, characterized in that the casing (1) comprises two half casings which are buckled with each other in the axial direction, the edges of the half casings protrude outwards in the radial direction to form flanges, the flanges of the two half casings are uniformly provided with correspondingly arranged mounting holes in the circumferential direction, and the two half casings are fixedly connected through bolts penetrating through the mounting holes.

8. The gearbox according to claim 7, characterized in that the top of the casing (1) is a horizontally disposed plane and the flange on the plane has a plurality of mounting holes disposed in a horizontal direction.