阅读说明：本技术 一种小型履带拖拉机用带爬行挡的传动箱 (Transmission case with crawling gear for small crawler tractor ) 是由 田淼 程诚 李锐涵 贺千禧 于 2019-11-12 设计创作，主要内容包括：一种小型履带拖拉机用带爬行挡的传动箱,涉及拖拉机技术领域,本发明通过主变速传动机构、副变速传动机构、爬行挡传动机构和中央传动机构的组合,实现了9个前进挡和3个倒退挡,可满足小型履带拖拉机各种作业工况对车速的要求,本发明具有传动路线清晰,结构简单,制造成本低廉,可将小型履带拖拉机发动机的动力向小型履带拖拉机行走装置及所需的农具传递,适合大范围的推广和应用。(The invention relates to a transmission case with a crawling gear for a small-sized crawler tractor, which relates to the technical field of tractors, and realizes 9 forward gears and 3 reverse gears through the combination of a main speed change transmission mechanism, an auxiliary speed change transmission mechanism, a crawling gear transmission mechanism and a central transmission mechanism, thereby meeting the requirements of various operation working conditions of the small-sized crawler tractor on the speed of the tractor.)

1. The utility model provides a small-size track tractor is with transmission case that area was crawled and is kept off, includes main gear drive, vice gear drive, crawls and keeps off drive, central transmission and transmission case casing (22), characterized by: the small-size caterpillar tractor is characterized in that a main variable-speed transmission mechanism, an auxiliary variable-speed transmission mechanism, a crawling gear transmission mechanism and a central transmission mechanism are sequentially arranged in a transmission case shell (22) from left to right, an engine is connected to the left end of a main variable-speed driving shaft (1) in the main variable-speed transmission mechanism, the right end of a main variable-speed driven shaft (9) in the main variable-speed transmission mechanism is connected with the power input end of the auxiliary variable-speed transmission mechanism, an auxiliary variable-speed driven shaft (19) in the auxiliary variable-speed transmission mechanism is respectively connected with the power input end of the crawling gear transmission mechanism and the power input end of the central transmission mechanism, and two ends of the power output end of the central transmission mechanism are respectively connected with a walking mechanism.

2. The transmission case with the crawling gear for the small-sized caterpillar tractor according to claim 1, wherein: the main variable-speed transmission mechanism comprises a main variable-speed driving shaft (1), an I-II gear duplicate gear (2), a reverse gear driven gear (3), an III-reverse gear duplicate gear (4), a main variable-speed driven shaft (9), an I gear driven gear (10), an II gear driven gear (11) and an III gear driven gear (14), wherein the main variable-speed driving shaft (1) is arranged at the upper part of a transmission case shell (22), the I-II gear duplicate gear (2) and the III-reverse gear duplicate gear (4) are sequentially arranged on the outer edge surface of the main variable-speed driving shaft (1) from left to right at intervals, the main variable-speed driven shaft (9) is arranged below the main variable-speed driving shaft (1), the I gear driven gear (10), the II gear driven gear (11), the reverse gear driven gear (3) and the III gear driven gear (14) are sequentially arranged on the outer edge surface of the main variable-speed driven shaft (9) from left to right at intervals, the right end of the main variable-speed driven shaft (9) is connected with an auxiliary variable-speed normally-meshed driving gear (15).

3. The transmission case with the crawling gear for the small crawler tractor according to claim 2, wherein: the main gear drive shaft (1) and the main gear driven shaft (9) are arranged in parallel at intervals.

4. The transmission case with the crawling gear for the small crawler tractor according to claim 2, wherein: a reverse gear idler shaft (13) is arranged below the reverse gear driven gear (3), a reverse gear idler (12) is arranged on the outer edge of the reverse gear idler shaft (13), and the reverse gear idler (12) is respectively meshed with the reverse gear driven gear (3) and the III-reverse gear duplicate gear (4).

5. The transmission case with the crawling gear for the small-sized caterpillar tractor according to claim 1, wherein: the auxiliary variable-speed transmission mechanism comprises an auxiliary variable-speed normally-meshed driven-low gear driving duplicate gear (5), an auxiliary variable-speed normally-meshed driving gear (15), a meshing sleeve (16), a low-gear driven-crawling gear one-level driving duplicate gear (17) and an auxiliary variable-speed driven shaft (19), the left end of the auxiliary variable-speed normally-meshed driving gear (15) is connected with the end part of the main variable-speed driven shaft (9), the auxiliary variable-speed normally-meshed driven-low gear driving duplicate gear (5) is sleeved on the outer edge surface of the main variable-speed driving shaft (1) in an empty mode, the right end of the auxiliary variable-speed normally-meshed driving gear (15) is provided with the meshing sleeve (16) capable of sliding left and right at intervals, the meshing sleeve (16) is connected with the auxiliary variable-speed driven shaft (19), the low-gear driven-crawling gear one-level driving duplicate gear (17) is sleeved on the outer edge surface of, the crawling gear one-level driving gear at the right end of the low-gear driven-crawling gear one-level driving duplicate gear (17) is meshed with the crawling gear one-level driven gear at the left end of the crawling gear one-level driven-crawling gear two-level driving duplicate gear (6).

6. The transmission case with the crawling gear for the small caterpillar tractor according to claim 5, wherein: the axes of the auxiliary variable-speed driven shaft (19) and the main variable-speed driven shaft (9) are on the same straight line.

7. The transmission case with the crawling gear for the small-sized caterpillar tractor according to claim 1, wherein: crawl and keep off drive mechanism including crawling and keep off one-level driven-crawl and keep off second grade initiative duplicate gear (6) and crawl and keep off second grade driven gear (18), crawl and keep off one-level driven-crawl and keep off second grade initiative duplicate gear (6) empty sleeve on the outer fringe face of main variable speed driving shaft (1), crawl and keep off second grade driven gear (18) and set up on the outer fringe face of auxiliary variable speed driven shaft (19), crawl and keep off second grade driven gear (18) and can select and crawl and keep off the driven-crawl of one-level and keep off second grade initiative duplicate gear (6) right-hand member and crawl and keep off second grade driving gear meshing or idle running.

8. The transmission case with the crawling gear for the small-sized caterpillar tractor according to claim 1, wherein: the central transmission mechanism comprises a central transmission output shaft (7), a central transmission small bevel gear (20) and a central transmission large bevel gear (21), the central transmission small bevel gear (20) is connected with the right end of the auxiliary variable speed driven shaft (19), the central transmission small bevel gear (20) is meshed with the central transmission large bevel gear (21), the central transmission large bevel gear (21) is fixed on the outer edge surface of the central transmission output shaft (7), the central transmission output shaft (7) and the auxiliary variable speed driven shaft (19) are arranged at 90 degrees, and two ends of the central transmission output shaft (7) are respectively connected with the traveling mechanism.

9. The transmission case with the crawling gear for the small-sized crawler tractor according to claim 8, wherein: the central transmission bevel pinion (20) and the right end of the auxiliary variable-speed driven shaft (19) are arranged into an integral structure.

10. The transmission case with the crawling gear for the small-sized caterpillar tractor according to claim 1, wherein: the right end of the main speed change driving shaft (1) is connected with a power output mechanism (8).

Technical Field

The invention relates to the technical field of tractors, in particular to a transmission case, and particularly relates to a transmission case with a crawling gear for a small crawler tractor.

Background

As is known, most transmission cases in the small-sized crawler tractor products in China are designed on the basis of medium-sized and large-sized crawler tractor transmission cases in a transformation mode, the transmission cases basically do not have a crawling gear function, and the internal structure of the transmission cases is not changed obviously. The transmission case has a complex structure and is not suitable for orchard gardening operation and crawling operation.

With the urgent need of orchard gardening operation and crawling operation development, the development and production of small-sized caterpillar tractors are more urgent. Therefore, a transmission case which is suitable for orchard gardening operation and crawling operation and has a simple and compact structure is urgently needed to be developed, the characteristic of strong adaptability of the small-sized crawler tractor is fully exerted, the requirements of orchard gardening operation and crawling operation can be met, the operation and the use are simple and convenient, the diversity of operation modes of the small-sized crawler tractor is realized, and the like.

Disclosure of Invention

The invention provides a transmission case with a crawling gear for a small-sized crawler tractor, aiming at overcoming the defects in the background art, and the transmission case realizes 9 forward gears and 3 reverse gears by combining a main variable-speed transmission mechanism, an auxiliary variable-speed transmission mechanism, a crawling gear transmission mechanism and a central transmission mechanism, and can meet the requirements of various working conditions of the small-sized crawler tractor on the speed of the tractor.

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

a transmission case with a crawling gear for a small crawler tractor comprises a main gear transmission mechanism, an auxiliary gear transmission mechanism, a crawling gear transmission mechanism, a central transmission mechanism and a transmission case shell, a main variable-speed transmission mechanism, an auxiliary variable-speed transmission mechanism, a crawling gear transmission mechanism and a central transmission mechanism are sequentially arranged in the transmission case shell from left to right, the left end of a main variable-speed driving shaft in the main variable-speed transmission mechanism is connected with an engine, the right end of a main variable-speed driven shaft in the main variable-speed transmission mechanism is connected with a power input end of an auxiliary variable-speed transmission mechanism, an auxiliary variable-speed driven shaft in the auxiliary variable-speed transmission mechanism is respectively connected with a power input end of a crawling gear transmission mechanism and a power input end of a central transmission mechanism, two ends of the power output end of the central transmission mechanism are respectively connected with a walking mechanism to form the transmission case with the crawling gear for the small-sized crawler tractor.

The small-size track tractor with the transmission case of the fender of crawling, main change gear drive mechanism includes main change driving shaft, I-II fender duplicate gear, reverse gear driven gear, III-reverse gear duplicate gear, main change driven shaft, I fender driven gear, II fender driven gear and III fender driven gear, the main change driving shaft sets up the upper portion at the transmission case casing, is equipped with I-II fender duplicate gear and III-reverse gear duplicate gear on the outer fringe face of main change driving shaft from left to right interval in proper order, is equipped with the main change driven shaft below the main change driving shaft the outer fringe face of main change driven shaft is equipped with I fender driven gear, II fender driven gear, reverse gear driven gear and III fender driven gear from left to right interval in proper order, and the right-hand member of main change driven shaft is connected vice variable speed and is normally engaged the driving gear.

The small-sized caterpillar tractor is provided with a transmission case with a crawling gear, and the main variable speed driving shaft and the main variable speed driven shaft are arranged in parallel at intervals.

The small-sized caterpillar tractor is provided with the transmission case with the crawling gear, a reverse gear idler shaft is arranged below the reverse gear driven gear, a reverse gear idler is arranged on the outer edge of the reverse gear idler shaft, and the reverse gear idler is respectively meshed with the reverse gear driven gear and the III-reverse gear duplicate gear.

The small-sized caterpillar tractor is provided with a transmission case with a crawling gear, the auxiliary variable transmission mechanism comprises an auxiliary variable speed normally-meshed driven-low gear driving duplicate gear, an auxiliary variable speed normally-meshed driving gear, a meshing sleeve, a low gear driven-crawling gear one-level driving duplicate gear and an auxiliary variable speed driven shaft, the left end of the auxiliary variable speed normally-meshed driving gear is connected with the end of the main variable speed driven shaft, the auxiliary variable speed normally-meshed driven-low gear driving duplicate gear is sleeved on the outer edge surface of the main variable speed driving shaft in an empty mode, the right end of the auxiliary variable speed normally-meshed driving gear is provided with the meshing sleeve capable of sliding left and right at intervals, the meshing sleeve is connected with the auxiliary variable speed driven shaft, the low gear driven-crawling gear one-level driving duplicate gear is sleeved on the outer edge surface of the left end of the auxiliary variable speed driven shaft in an empty mode, the crawling gear one-level driving duplicate gear on the right end of the low gear driven-crawling gear one-level The crawling gear is meshed with the first-stage driven gear.

The small-sized caterpillar tractor is provided with a transmission case with a crawling gear, and the axes of the auxiliary variable-speed driven shaft and the main variable-speed driven shaft are on the same straight line.

The small-size caterpillar tractor with the transmission case with the crawling gear comprises a crawling gear one-level driven-crawling gear two-level driving duplicate gear and a crawling gear two-level driven gear, wherein the crawling gear one-level driven-crawling gear two-level driving duplicate gear is sleeved on the outer edge face of a main speed change driving shaft in an empty mode, the crawling gear two-level driven gear is arranged on the outer edge face of an auxiliary speed change driven shaft, and the crawling gear two-level driven gear can be meshed with or idled to the crawling gear two-level driving gear at the right end of the crawling gear one-level driven-crawling gear two-level driving duplicate gear.

The small-sized caterpillar tractor is provided with the transmission case with the crawling gear, the central transmission mechanism comprises a central transmission output shaft, a central transmission small bevel gear and a central transmission large bevel gear, the central transmission small bevel gear is connected with the right end head of the auxiliary variable speed driven shaft, the central transmission small bevel gear is meshed with the central transmission large bevel gear, the central transmission large bevel gear is fixed on the outer edge surface of the central transmission output shaft, the central transmission output shaft and the auxiliary variable speed driven shaft are arranged at 90 degrees, and two ends of the central transmission output shaft are respectively connected with the traveling mechanism.

The small crawler tractor is provided with a transmission case with a crawling gear, and the central transmission bevel pinion and the right end of the auxiliary variable speed driven shaft are arranged into an integral structure.

The small-sized caterpillar tractor is provided with a transmission case with a crawling gear, and the right end of the main speed change driving shaft is connected with a power output mechanism.

By adopting the technical scheme, the invention has the following advantages:

the invention realizes 9 forward gears and 3 reverse gears through the combination of the main variable-speed transmission mechanism, the auxiliary variable-speed transmission mechanism, the crawling gear transmission mechanism and the central transmission mechanism, can meet the requirements of various operating conditions of the small-sized crawler tractor on the speed of the tractor, has clear transmission line, simple structure and low manufacturing cost, can transmit the power of the engine of the small-sized crawler tractor to the walking device of the small-sized crawler tractor and required farm tools, and is suitable for wide popularization and application.

Drawings

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1. a main speed change driving shaft; 2. a first-II gear duplicate gear; 3. a reverse driven gear; 4. III-reverse gear duplicate gear; 5. the auxiliary transmission is normally meshed with a driven-low gear driving duplicate gear; 6. the first-stage driven of the crawling gear-the second-stage driving duplicate gear of the crawling gear; 7. a central drive output shaft; 8. a power take-off mechanism; 9. a main transmission driven shaft; 10. a I-gear driven gear; 11. a II-gear driven gear; 12. a reverse gear idler wheel; 13. a reverse gear idler shaft; 14. a III-gear driven gear; 15. the auxiliary transmission is normally engaged with a driving gear; 16. an engagement sleeve; 17. a low-gear driven-crawling gear primary driving duplicate gear; 18. a crawling gear secondary driven gear; 19. an auxiliary variable speed driven shaft; 20. a central transmission bevel pinion; 21. a central transmission large bevel gear; 22. a transmission housing.

Detailed Description

The present invention will be explained in more detail by the following examples, which are not intended to limit the invention;

it should be noted that the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., used in describing the structure of the present invention are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

The transmission case with the crawling gear for the small-sized crawler tractor is shown in the attached drawing 1 and comprises a main speed change transmission mechanism, an auxiliary speed change transmission mechanism, a crawling gear transmission mechanism, a central transmission mechanism and a transmission case shell 22, wherein the main speed change transmission mechanism, the auxiliary speed change transmission mechanism, the crawling gear transmission mechanism and the central transmission mechanism are sequentially arranged in the transmission case shell 22 from left to right, the left end of a main speed change driving shaft 1 in the main speed change transmission mechanism is connected with an engine, the right end of the main speed change driving shaft 1 is connected with a power output mechanism 8, the right end of a main speed change driven shaft 9 in the main speed change transmission mechanism is connected with the power input end of the auxiliary speed change transmission mechanism, an auxiliary speed change driven shaft 19 in the auxiliary speed change transmission mechanism is respectively connected with the power input end of the crawling gear transmission mechanism and the power input end of the central transmission mechanism, and two ends of the power output end of the central transmission mechanism are respectively connected with a traveling.

Wherein the main speed change transmission mechanism comprises a main speed change driving shaft 1, an I-II gear duplex gear 2, a reverse gear driven gear 3, a III-reverse gear duplex gear 4, a main speed change driven shaft 9, an I-gear driven gear 10, an II-gear driven gear 11 and a III-gear driven gear 14, the main speed change driving shaft 1 is arranged at the upper part of a transmission case shell 22, the I-II gear duplex gear 2 and the III-reverse gear duplex gear 4 are sequentially arranged on the outer edge surface of the main speed change driving shaft 1 from left to right at intervals, the main speed change driven shaft 9 is arranged below the main speed change driving shaft 1, the main speed change driving shaft 1 and the main speed change driven shaft 9 are arranged in parallel and at intervals, the I-gear driven gear 10, the II-gear driven gear 11, the reverse gear driven gear 3 and the III-gear driven gear 14 are sequentially arranged on the outer edge surface of the main speed change driven shaft 9 from left to right at intervals, the right end of the main transmission driven shaft 9 is connected with an auxiliary transmission normally-engaged driving gear 15, a reverse gear idler shaft 13 is arranged below the reverse gear driven gear 3, a reverse gear idler 12 is arranged on the outer edge of the reverse gear idler shaft 13, and the reverse gear idler 12 is respectively engaged with the reverse gear driven gear 3 and the III-reverse gear duplicate gear 4.

The auxiliary variable transmission mechanism comprises an auxiliary variable speed normally-meshed driven-low gear driving duplicate gear 5, an auxiliary variable speed normally-meshed driving gear 15, a meshing sleeve 16, a low gear driven-crawling gear primary driving duplicate gear 17 and an auxiliary variable speed driven shaft 19, the left end of the auxiliary variable speed normally-meshed driving gear 15 is connected with the end part of the main variable speed driven shaft 9, the auxiliary variable speed normally-meshed driven-low gear driving duplicate gear 5 is sleeved on the outer edge surface of the main variable speed driving shaft 1 in an empty mode, the right end of the auxiliary variable speed normally-meshed driving gear 15 is provided with the meshing sleeve 16 at intervals, the meshing sleeve 16 can slide left and right, the meshing sleeve 16 is connected with the auxiliary variable speed driven shaft 19, in specific implementation, the axes of the auxiliary variable speed driven shaft 19 and the main variable speed driven shaft 9 are on the same straight line, the outer edge surface at the left end of the auxiliary variable speed driven shaft 19 is sleeved with the low gear driven-crawling gear primary driving, the crawling gear first-stage driving gear at the right end of the low-gear driven-crawling gear first-stage driving duplicate gear 17 is meshed with the crawling gear first-stage driven gear at the left end of the crawling gear first-stage driven-crawling gear second-stage driving duplicate gear 6.

The crawling gear transmission mechanism comprises a crawling gear one-level driven-crawling gear two-level driving duplicate gear 6 and a crawling gear two-level driven gear 18, the crawling gear one-level driven-crawling gear two-level driving duplicate gear 6 is sleeved on the outer edge face of the main speed change driving shaft 1 in an empty mode, the crawling gear two-level driven gear 18 is arranged on the outer edge face of the auxiliary speed change driven shaft 19, and the crawling gear two-level driven gear 18 can be meshed with or idled by a crawling gear one-level driven-crawling gear two-level driving duplicate gear 6 right end.

The central transmission mechanism comprises a central transmission output shaft 7, a central transmission small bevel gear 20 and a central transmission large bevel gear 21, wherein the central transmission small bevel gear 20 is arranged at the right end head of the auxiliary variable-speed driven shaft 19, in the specific implementation, the central transmission small bevel gear 20 and the right end head of the auxiliary variable-speed driven shaft 19 can be integrated, the central transmission small bevel gear 20 is meshed with the central transmission large bevel gear 21, the central transmission large bevel gear 21 is fixed on the outer edge surface of the central transmission output shaft 7, the central transmission output shaft 7 and the auxiliary variable-speed driven shaft 19 are arranged at 90 degrees, and two ends of the central transmission output shaft 7 are respectively connected with the traveling mechanisms.

When the crawler tractor is concretely implemented, a main variable-speed transmission mechanism, an auxiliary variable-speed transmission mechanism, a crawling gear transmission mechanism and a central transmission mechanism are sequentially distributed in a transmission case shell 22, wherein the left end of a main variable-speed driving shaft 1 in the main variable-speed transmission mechanism is connected with an engine of the small crawler tractor, and two sides of the central transmission mechanism are respectively connected with a travelling mechanism of the small crawler tractor.

A main speed change driving shaft 1, a main speed change driven shaft 9 and a reverse gear idler shaft 13 are respectively arranged in the main speed change transmission mechanism, an auxiliary speed change driven shaft 19 is arranged in the auxiliary speed change transmission mechanism, no independent shaft exists in the crawling gear transmission mechanism, a central transmission output shaft 7 is arranged in the central transmission mechanism, and a power output driving shaft and a power output shaft can be arranged in the power output mechanism 8 during specific implementation, and the power output mechanism 8 is not the key point of protection of the invention, so specific description of the power output mechanism is not provided; the main speed change driving shaft 1 is shared by a main speed change transmission mechanism, an auxiliary speed change transmission mechanism and a crawling gear transmission mechanism, the axes of a main speed change driven shaft 9 and an auxiliary speed change driven shaft 19 are on the same straight line, the axes of the main speed change driving shaft 1, the main speed change driven shaft 9 and a reverse gear idler shaft 13 are parallel to each other, the axis of a central transmission output shaft 7 is perpendicular to the axis of the auxiliary speed change driven shaft 19, and the axis of a power output driving shaft in a power output mechanism 8 and the axis of the main speed change driving shaft 1 are on the same straight line.