CN217207575U

CN217207575U - High-power tractor crawls and keeps off transmission case assembly

Info

Publication number: CN217207575U
Application number: CN202221235628.6U
Authority: CN
Inventors: 陈正华
Original assignee: Zhejiang Haitian Intelligent Technology Co Ltd
Current assignee: Zhejiang Haitian Intelligent Technology Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-08-16
Anticipated expiration: 2032-05-19

Abstract

The utility model belongs to the technical field of the tractor, refer in particular to a high-power tractor crawls and keeps off transmission case assembly, including the box, the input shaft, fixed axle and output shaft, the input shaft is located same axis with the output shaft, is equipped with the one-level driving gear on the input shaft and directly keeps off the toothholder, is equipped with the meshing toothholder on the output shaft, crawls and keeps off toothholder and second grade driven gear, is equipped with one-level driven gear, second grade driving gear on the fixed axle, and the meshing toothholder is through meshing tooth cover and directly keep off the toothholder or crawl and keep off the toothholder and join in marriage. The utility model discloses an add one and crawl and keep off the transmission case to the drive ratio of gear train in the rational design transmission case, make the minimum speed that the tractor can reach become 0.458km/h by original 3.0km/h, and then effectively satisfy corn stalk and cut up, rub silk, beat bundle operation, rhizome class crop excavation operation such as chinese yam and the agronomy requirement of ditching, paddy field stem building operation etc. has effectively enlarged tractor operating range.

Description

High-power tractor crawls and keeps off transmission case assembly

The technical field is as follows:

the utility model belongs to the technical field of the tractor, refer in particular to a high-power tractor crawls and keeps off transmission case assembly.

Background art:

at present, the speed provided by a gearbox of a traditional tractor is not low enough, the lowest speed can only reach 3.0km/h generally, and the tractor is required to run at a lower speed state to meet the requirements of the operations when corn straws are cut, kneaded and bundled, when root crops such as Chinese yams are excavated, and when ditching and paddy field stalk building operations are carried out.

The tractor gearbox crawling gear structure comprises a gear shaft consisting of a primary speed reduction driving gear and a middle shaft; the first-stage reduction driving gear is meshed with the first-stage reduction driven gear; a gear shaft formed by the intermediate shaft of the creep gear and the driving gear of the creep gear; the crawling gear driving gear is meshed with the crawling gear driven gear. In the structure, because the space in the existing tractor gearbox is limited, how to reasonably design the transmission ratio of the first-stage reduction gear set and the second-stage reduction gear set so as to obtain a larger total transmission ratio in the gearbox with limited space, thereby enabling the crawling gear of the tractor to meet the low-speed requirement in the operation.

The invention content is as follows:

the utility model aims at providing a high-power tractor crawls and keeps off transmission case assembly, it keeps off the transmission case through addding one and crawls, and the drive ratio of the internal gear train of rational design transmission case, make the minimum speed that the tractor can reach become 0.458km/h by original 3.0km/h, and then effectively satisfy the maize straw and cut up, rub the silk, beat the bundle operation, the rhizome class crop is like excavating operation such as chinese yam, and the ditching, the agricultural requirements such as stem operation are built to the paddy field, tractor operating range has effectively been enlarged.

The utility model discloses a realize like this:

a crawling gear transmission case assembly of a high-power tractor comprises a case body, an input shaft, a fixed shaft and an output shaft, wherein the input shaft, the fixed shaft and the output shaft are rotatably connected to the case body, the input shaft and the output shaft are positioned on the same axis, a first-stage driving gear and a direct gear seat are arranged on the input shaft, an engaging gear seat, a crawling gear seat and a second-stage driven gear are arranged on the output shaft, the crawling gear seat and the second-stage driven gear synchronously rotate and can rotate relative to the output shaft, the fixed shaft is provided with a first-stage driven gear meshed with the first-stage driving gear and a second-stage driving gear meshed with the second-stage driven gear, an engaging gear sleeve capable of axially moving is arranged in the case body, and the engaging gear seat is connected with the direct gear seat or the crawling gear seat through the engaging gear sleeve,

the transmission ratio between the primary driving gear and the primary driven gear is 16:5, and the transmission ratio between the secondary driving gear and the secondary driven gear is 45: 22.

In the crawling gear transmission case assembly of the high-power tractor, the tooth number of the first-stage driving gear is 15, the tooth number of the first-stage driven gear is 48, the tooth number of the second-stage driving gear is 22, the tooth number of the second-stage driven gear is 45, and the center distance between the first-stage driving gear and the first-stage driven gear and the center distance between the second-stage driving gear and the second-stage driven gear are 135 mm.

In the crawling gear transmission case assembly of the high-power tractor, the input shaft and the primary driving gear are of an integrated structure and form a gear shaft structure.

In the crawling gear transmission case assembly of the high-power tractor, the fixed shaft between the primary driven gear and the secondary driving gear is sleeved with the gear shaft sleeve.

In the crawling transmission box assembly of the high-power tractor, the outer end of the output shaft extends out of the box body and is rotatably connected with the rear axle bearing cover through the needle roller bearing, and the output shaft is in transmission connection with the rear axle input shaft through the spline.

Compared with the prior art, the utility model outstanding advantage is:

1. the utility model adds a crawling gear transmission case and reasonably designs the transmission ratio of the gear set in the transmission case, so that the lowest speed which can be reached by the tractor is changed from the original 3.0km/h to 0.458km/h, thereby effectively meeting the agricultural requirements of corn straw chopping, kneading, bundling, digging operation of rhizome crops such as Chinese yam and the like, ditching, paddy field stalk building operation and the like, and effectively expanding the operation range of the tractor;

2. the utility model controls the position of the meshing gear sleeve, so that when the meshing gear sleeve is respectively jointed with the meshing gear seat and the direct gear seat, the power of the input shaft can be directly transmitted to the output shaft, and further the direct gear is formed; when the meshing gear sleeve is respectively connected with the meshing gear seat and the crawling gear seat, the power of the input shaft is subjected to speed reduction transmission through the first-stage speed reduction gear set and the second-stage speed reduction gear set in sequence and is finally transmitted to the output shaft, and then the crawling gear is formed; of course, the meshing gear sleeve is not connected with the direct gear seat and the crawling gear seat, so that the power of the input shaft cannot be transmitted to the output shaft, and a neutral gear is formed.

Description of the drawings:

fig. 1 is the overall mechanical transmission diagram of the present invention.

In the figure: 1. a box body; 2. an input shaft; 3. a fixed shaft; 4. an output shaft; 5. a primary driving gear; 6. A direct gear seat; 7. a meshing toothholder; 8. a crawling gear tooth seat; 9. a secondary driven gear; 10. a primary driven gear; 11. a secondary drive gear; 12. meshing the gear sleeve; 13. a gear shaft sleeve; 14. a needle bearing; 15. And a rear axle bearing cover.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, see fig. 1:

a high-power tractor crawling gear transmission case assembly comprises a case body 1, an input shaft 2, a fixed shaft 3 and an output shaft 4, wherein the input shaft 2, the fixed shaft 3 and the output shaft 4 are rotatably connected to the case body 1, the input shaft 2 and the output shaft 4 are positioned on the same axis, a first-stage driving gear 5 and a direct gear holder 6 are arranged on the input shaft 2, an engaging gear holder 7, a crawling gear holder 8 and a second-stage driven gear 9 are arranged on the output shaft 4, the crawling gear holder 8 and the second-stage driven gear 9 rotate synchronously and can rotate relative to the output shaft 4, a first-stage driven gear 10 meshed with the first-stage driving gear 5 and a second-stage driving gear 11 meshed with the second-stage driven gear 9 are arranged on the fixed shaft 3, an engaging gear sleeve 12 capable of moving axially is arranged in the case body 1, the engaging gear holder 7 is connected with the direct gear holder 6 or the crawling gear holder through the engaging gear sleeve 12, the transmission ratio between the first-stage driving gear 5 and the first-stage driven gear 10 is 16:5, the transmission ratio between the secondary driving gear 11 and the secondary driven gear 9 is 45: 22.

Meanwhile, in this embodiment, the number of teeth of the first-stage driving gear 5 is 15, the number of teeth of the first-stage driven gear 10 is 48, the number of teeth of the second-stage driving gear 11 is 22, the number of teeth of the second-stage driven gear 9 is 45, and the center distance between the first-stage driving gear 5 and the first-stage driven gear 10 and between the second-stage driving gear 11 and the second-stage driven gear 9 is 135 mm.

Namely the utility model discloses an add a transmission case of crawling fender to the drive ratio of gear train in the rational design transmission case, make the minimum speed that the tractor can reach become 0.458km/h by original 3.0km/h, and then effectively satisfy corn stalk and cut up, rub silk, beat bundle operation, rhizome class crop excavation operation such as chinese yam and the agronomy requirement of ditching, paddy field stem building operation etc. has effectively enlarged tractor operating range.

Furthermore, in the present embodiment, according to the design requirements of the number of teeth and the center distance between the first-stage driving gear 5 and the first-stage driven gear 10, and in order to ensure the load strength of the input shaft 2, the input shaft 2 and the first-stage driving gear 5 are integrated into a whole and form a gear shaft structure, and in order to axially limit the first-stage driven gear 10 and the second-stage driving gear 11, a gear shaft sleeve 13 is sleeved on the fixed shaft 3 between the first-stage driven gear 10 and the second-stage driving gear 11.

Wherein, the utility model discloses a crawl and keep off transmission case and rear axle transmission cooperation, its the outer end of output shaft 4 stretches out outside the box 1 to rotate through bearing 14 and rear axle bearing cap 15 and be connected, and output shaft 4 is connected with the rear axle input shaft transmission through the spline.

Furthermore, the utility model controls the position of the meshing gear sleeve 12, so that when the meshing gear sleeve 12 is respectively connected with the meshing gear seat 7 and the direct gear seat 6, the power of the input shaft 2 can be directly transmitted to the output shaft 4, and then the direct gear is formed; namely, the transmission route of the direct gear is as follows: input shaft 2 → direct carrier 6 → engaging carrier 7 → output shaft 4;

when the meshing gear sleeve 12 is respectively connected with the meshing gear seat 7 and the crawling gear seat, the power of the input shaft 2 is subjected to speed reduction transmission through the first-stage speed reduction gear set and the second-stage speed reduction gear set in sequence and is finally transmitted to the output shaft 4, and then the crawling gear is formed; namely, the transmission route of the crawling gear is as follows: the input shaft 2 → the primary driving gear 5 → the primary driven gear 10 → the fixed shaft 3 → the secondary driving gear 11 → the secondary driven gear 9 → the creeper gear bed 8 → the engaging bed 7 → the output shaft 4;

of course, the meshing sleeve gear 12 may not be engaged with the direct carrier 6 and the creep carrier, so that the power of the input shaft 2 cannot be transmitted to the output shaft 4, thereby forming a neutral gear.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a high-power tractor crawls and keeps off transmission case assembly which characterized in that: comprises a box body (1), an input shaft (2), a fixed shaft (3) and an output shaft (4) which are rotationally connected on the box body (1), wherein the input shaft (2) and the output shaft (4) are positioned on the same axis, a first-stage driving gear (5) and a direct gear holder (6) are arranged on the input shaft (2), a meshing gear holder (7), a crawling gear holder (8) and a second-stage driven gear (9) are arranged on the output shaft (4), the crawling gear holder (8) and the second-stage driven gear (9) synchronously rotate and can rotate relative to the output shaft (4), a first-stage driven gear (10) meshed with the first-stage driving gear (5) and a second-stage driving gear (11) meshed with the second-stage driven gear (9) are arranged on the fixed shaft (3), a meshing gear sleeve (12) capable of axially moving is arranged in the box body (1), and the meshing gear holder (7) is connected with the direct gear holder (6) or the crawling gear holder through the meshing gear sleeve (12),

the transmission ratio between the primary driving gear (5) and the primary driven gear (10) is 16:5, and the transmission ratio between the secondary driving gear (11) and the secondary driven gear (9) is 45: 22.

2. The high power tractor crawling gear transmission case assembly according to claim 1, wherein: the number of teeth of one-level driving gear (5) is 15, and the number of teeth of one-level driven gear (10) is 48, and the number of teeth of second grade driving gear (11) is 22, and the number of teeth of second grade driven gear (9) is 45, and the centre-to-centre spacing between one-level driving gear (5) and one-level driven gear (10), between second grade driving gear (11) and second grade driven gear (9) is 135 mm.

3. The crawling transmission box assembly for the high-power tractor according to claim 1 or 2, wherein: the input shaft (2) and the primary driving gear (5) are of an integrated structure and form a gear shaft structure.

4. The high power tractor crawling gear transmission case assembly according to claim 1, wherein: a gear shaft sleeve (13) is sleeved on the fixed shaft (3) between the primary driven gear (10) and the secondary driving gear (11).

5. The high power tractor crawling gear transmission case assembly according to claim 1, wherein: the outer end of the output shaft (4) extends out of the box body (1) and is rotationally connected with a rear axle bearing cover (15) through a needle bearing (14), and the output shaft (4) is in transmission connection with a rear axle input shaft through a spline.