CN210920001U - Crawler vehicle transmission - Google Patents

Abstract

The utility model relates to a tracked vehicle transmission. The tracked vehicle transmission comprises a box body component, a transmission component, a differential steering component and a main reducer component, wherein the transmission component, the differential steering component and the main reducer component are installed in the box On the body assembly, the transmission assembly has a high-speed fourth gear and a low-speed fourth gear, the differential steering assembly adopts HST to directly control the worm, and the worm adjusts the worm gears of the differential devices on both sides to realize vehicle steering. It works together with the transmission components to achieve a combination of 8 forward speeds and 8 reverse speeds. The utility model adopts HST direct connection to control the steering of the tracked vehicle, adopts a rear-mounted forward and reverse gear switching module, and obtains the same number of forward and reverse gears, and the number of gears is large, which is suitable for complex working conditions, and has the advantages of simple structure and high steering precision. , Steering instantaneous speed can be adjusted and so on.

Description

A tracked vehicle transmission

technical field

The utility model belongs to the technical field of mechanical transmission, in particular to a tracked vehicle transmission.

Background technique

The paddy fields in the south are flooded all the year round due to the planting of rice, which causes the land to bond and the soil bearing capacity is poor. The tracked vehicles working in the paddy fields in the south, such as tracked tractors, tracked rotary tillers, tracked combine harvesters, etc. Driving device, crawler grounding area is large, grounding pressure is small, especially light crawler tractor, small crawler combine harvester and other compact structure, small weight, not suitable for subsidence and slipping in slippery soil, good passing performance, and widely used. use. In order to store water level, the area of paddy field is generally small. Therefore, the tracked vehicles are mainly small two-tracked vehicles. Due to their unique structural characteristics, the two-tracked vehicles can only use the method of differential drive on both sides to achieve steering. . At present, the steering methods of two-tracked vehicles include single power flow, dual power flow and other steering forms. Among them, dual power flow steering has high efficiency and is widely used because the power transmission is not interrupted during the steering process. However, due to the duplication of the hydraulic power transmission route, the dual-power steering device currently applied to the crawler tractor has many parts, large mass and low control precision. In order to solve the above problems, a new tracked vehicle speed change transmission method and equipment are proposed.

In order to solve the above problems, there is an urgent need to develop a tracked vehicle transmission with a simple structure, high steering precision and adjustable steering instantaneous rate.

Utility model content

The purpose of the utility model is to provide a crawler vehicle transmission with simple structure, high steering precision and adjustable steering instantaneous speed.

The above purpose is achieved through the following technical solutions: a tracked vehicle transmission, including a case assembly, a transmission assembly, a differential steering assembly, a final reducer assembly and an assembly, the case assembly, the transmission assembly, the differential steering assembly, the main The speed reducer assembly is connected as a whole through a fitting, the transmission assembly includes an input shaft assembly, a one-shaft assembly, a two-shaft assembly, an output shaft assembly and a shift fork assembly, the output shaft assembly includes an output shaft, an output shaft driven gear and The output shaft drive gear, the shift fork assembly includes a third- and fourth-speed shift fork and a first- and second-speed shift fork, the input shaft assembly is powered with a shaft assembly, and the two shaft assemblies are respectively powered with the first shaft assembly and the output shaft assembly. Connection, the output shaft assembly is connected with the main reducer assembly through the differential steering assembly and can transmit power to the main reducer assembly after differential processing, and the one-shaft assembly includes a shaft, a driven gear, a four Gear driving gear, third and fourth gear joint sleeve, third and fourth gear spline hub, third gear driving gear, second gear driving gear, first gear driving gear and HST driving bevel gear, the first shaft driven gear, second gear driving gear, The first-speed driving gear, the third- and fourth-speed spline hub and the HST driving bevel gear are fixed on a shaft, the fourth-speed driving gear and the third-speed driving gear are idle on a shaft, and the second-shaft assembly includes high- and low-speed splines Hub, high and low gear joint sleeve, fourth gear driven gear, third gear driven gear, second gear driven gear, first and second gear joint sleeve, first and second gear spline hub, first gear driven gear and second shaft, the two The driven gear of the fourth gear, the driven gear of the first gear, the driven gear of the first gear and the spline hub of the first and second gears are fixed on the second shaft. The hub is arranged between the fourth gear driving gear and the third gear driving gear, the first and second gear spline hubs are arranged between the second gear driven gear and the first gear driven gear, the fourth gear driving gear, the third gear driving gear , the second-speed driving gear and the first-speed driving gear mesh with the fourth-speed driven gear, the third-speed driven gear, the second-speed driven gear, and the first-speed driven gear respectively. The key is sleeved on the spline hub of the third and fourth gears and can slide along the spline hub of the third and fourth gears. The hub slides back and forth, and the third and fourth gear shift forks can drive the third and fourth gear engaging sleeves to move along the third and fourth gear spline hubs and realize the meshing between the third and fourth gear engaging sleeves and the fourth gear driving gear or the third gear driving gear, The first and second gear shift forks can drive the first and second gear engaging sleeves to move along the first and second gear spline hubs and realize the meshing of the first and second gear engaging sleeves with the second gear driven gear or the first gear driven gear. The steering assembly includes a left differential assembly and a right differential assembly with the same structure, as well as a worm, an HST driven bevel gear, and an HST transmission. The left differential assembly includes a left sun gear, a left planetary gear, a left planet carrier, and a left ring gear. A planetary gear transmission mechanism, a left worm gear and a left shunt gear are formed, the left worm gear is arranged on the outer side of the left ring gear, and the worm is meshed with the left worm gear of the left differential assembly and the right turbine of the right differential assembly. , the worm and the left worm gear and the right worm gear form a worm gear and worm assembly, and the output shaft driving gear is respectively It meshes with the left split gear of the left differential assembly and the left split gear of the right differential assembly, the HST driving bevel gear is arranged on the input shaft of the HST transmission, and the HST driven bevel gear is constantly meshed with the HST driving bevel gear, The output end of the HST transmission is connected with the worm.

A further technical solution is that the shift fork assembly further includes a high- and low-speed shift fork, a low-speed driving gear is fixed on the one shaft, and the two-shaft assembly further includes a low-speed driven gear and a high- and low-speed spline hub, so The low-speed driving gear meshes with the low-speed driven gear, the low-speed driven gear and the high- and low-speed spline hubs are vacantly sleeved on the two shafts, and the high- and low-speed engagement sleeves are sleeved on the high- and low-speed spline hubs through splines and can slide along the high and low gear spline hubs, the high and low gear spline hubs are arranged between the low gear driven gear and the fourth gear driven gear, and the high and low gear shift forks can drive the high and low gear engaging sleeves along the The high and low gear spline hub moves and realizes the meshing between the high and low gear engaging sleeve and the fourth gear driven gear or the low gear driven gear.

A further technical solution is that the left differential assembly further includes a left driving bevel gear, a left sun gear shaft, a left planetary gear shaft and a left planet carrier connecting plate, and the left split gear and the left sun gear are sleeved on the left sun gear shaft through splines. On the left planet carrier, 2 to 4 evenly distributed left planetary gear shafts are installed on the left planetary gear shaft, and the left planetary gear is sleeved through the shaft sleeve, and the left planetary gear is connected by the left planetary carrier and the left planetary carrier. Plate clearance fit positioning, the left ring gear is supported on the left sun gear shaft and the left planet carrier respectively through deep groove ball bearings, the left driving bevel gear is a shaft gear, and the middle is supported on the box by an angular contact bearing. Set left planet carrier.

A further technical solution is that the main reducer assembly includes a left main deceleration assembly and a right main deceleration assembly with the same main structure, and the left main deceleration assembly includes a left output shaft, a left forward driven bevel gear, a left joint sleeve, a left The spline hub and the left reverse driven bevel gear, the left output shaft is arranged on the box body through an angular contact bearing, the left forward driven bevel gear and the left reverse driven bevel gear are sleeved on the On the left output shaft, the left forward driven bevel gear and the left reverse driven bevel gear are constantly meshed with the left driving bevel gear, the left spline hub is sleeved on the left output shaft through splines, and the left engagement sleeve is The spline sleeve is mounted on the left spline hub and can slide left and right on the left spline hub.

A further technical solution is that one end of the left output shaft outputs power to the outside, the other end is sleeved on the right output shaft through a bushing, and one end of the right output shaft outputs power to the outside, and the left output shaft and the right output shaft are connected. A right thrust bearing is arranged between, a right thrust sleeve is arranged on the left output shaft and the right output shaft, and a thrust sleeve is arranged on both sides of the left spline hub and the right spline hub.

A further technical solution is that the input shaft assembly comprises an input shaft driving gear and an input shaft, the input shaft driving gear is sleeved on the input shaft through splines, and the two ends of the input shaft are respectively supported on the input shaft by deep groove ball bearings. On the box body, the input shaft is positioned close to the clutch end using an end cover, the end cover is provided with a sealing ring, the other end of the input shaft is positioned with the two shafts through a retaining ring, and one end of the input shaft is connected to the clutch driven disc spline. And output the power to a driven gear through the input shaft drive gear.

A further technical solution is that the fourth-speed driving gear and the third-speed driving gear are sleeved on one shaft through the shaft sleeve, and the low-speed driven gear and the high-low speed spline hub are sleeved on the second shaft through the needle roller bearing. The fourth-speed driven gear and the third-speed driven gear are sleeved on the second shaft through splines, and the second-speed driven gear and the first-speed driven gear are sleeved on the second shaft through the shaft sleeve.

A further technical solution is that the one-shaft assembly further includes a power output connecting sleeve and a power output shaft, one end of the one shaft is connected to the power output shaft through the power output connecting sleeve, and the power output shaft is installed on the power output shaft through a deep groove ball bearing. The power is output on the box body and through the flange.

A further technical solution is that between the first-speed driven gear and the deep groove ball bearing, between the third-speed driven gear and the second-speed driven gear, between the fourth-speed driven gear and the high and low gear spline hubs, the low A thrust sleeve is used for positioning between the gear and the deep groove ball bearing.

A further technical solution is that the output shaft driven gear is sleeved on the output shaft through splines, the output shaft driven gear meshes with the external teeth on the high and low gear engaging sleeves, and the output shaft driven gear is a wide gear with high and low gears. The gear engaging sleeve is in constant mesh with the output shaft driven gear in neutral gear, high gear and low gear.

Compared with the prior art, the advantages of the present invention are as follows: 1) the output end of the HST transmission is used to directly control the worm, thereby changing the speed of the worm gear, so that the left and right side speeds of the tracked vehicle change, and the structure is simple and compact. 2) The HST transmission is driven by a bevel gear device on one shaft of the transmission, the input speed of the HST is independent of the speed of the transmission, and the tracked vehicle can be turned in place when the transmission is in neutral. 3) The stepless speed regulation of the HST transmission enables the instantaneous steering angle of the tracked vehicle to be adjusted steplessly, with high steering precision; 4) One shaft is directly connected to the PTO transmission, and can continue to output, and has a strong ability to external power units. 5) Adopt forward driven bevel gear and reverse driven bevel gear switching device to realize forward gear and reverse gear, which is more convenient to operate in complex working environment. 6) The worm gear with different rotation directions is used to control the worm gear to realize the speed regulation of the left and right sides, and the structure is simple.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

1 is a structural diagram of a tracked vehicle transmission according to an embodiment of the present invention;

FIG. 2 is a structural diagram of a main transmission according to an embodiment of the present invention;

3 is a schematic structural diagram of a differential steering assembly involved in an embodiment of the present invention;

4 is a schematic structural diagram of another section of a differential steering assembly involved in an embodiment of the present invention;

5 is a structural diagram of a worm gear differential according to an embodiment of the present invention.

In the picture:

A Case assembly B Transmission assembly C Differential steering assembly D Final reducer assembly

E Assembly Parts A1 Box A2 Box Cover A3 Oil Drain Bolt

B1 input shaft assembly B2 one shaft assembly B3 two shaft assembly B4 output shaft assembly

B5 shift fork assembly B11 input shaft driving gear B12 input shaft

B21 one shaft B22 one shaft driven gear B23 low gear driving gear B24 four gear driving gear

B25 Third and fourth gear joint sleeve B26 Third and fourth gear spline hub B27 Third gear driving gear B28 Second gear driving gear

B29 First gear driving gear B210 HST driving bevel gear B211 PTO connecting sleeve B212 PTO shaft

B31 Low gear driven gear B32 High and low gear spline hub B33 High and low gear engaging sleeve B34 Fourth gear driven gear

B35 3rd gear driven gear B36 2nd gear driven gear B37 1st and 2nd gear engaging sleeve B38 1st and 2nd gear spline hub

B39 first gear driven gear B310 two shafts B41 output shaft B42 output shaft driven gear

B43 output shaft driving gear B51 high and low gear fork B52 three or four gear fork B53 one or two gear fork

C1 Left Differential Assembly C2 Right Differential Assembly C3 Worm C4 HST Driven Bevel Gear

C5 HST transmission C11 Left split gear C12 Left sun gear C13 Left planetary gear

C14 Left ring gear C15 Left worm gear C16 Left planet carrier C17 Left drive bevel gear

C18 Left sun gear shaft C21 Right split gear C22 Right sun gear C23 Right planetary gear

C24 right ring gear C25 right worm gear C26 right planet carrier C27 right driving bevel gear

C28 Right sun gear shaft D1 Left main deceleration assembly D2 Right main deceleration assembly D11 Left output shaft

D12 Left forward driven bevel gear D13 Left coupling sleeve D14 Left spline hub D15 Left reverse driven bevel gear

D21 Right output shaft D22 Right forward driven bevel gear D23 Right coupling sleeve D24 Right spline hub

D25 right reverse driven bevel gear E1 end cover E2 sealing ring E3 deep groove ball bearing

E4 Angular Contact Bearings E5 Needle Roller Bearings E6 Retaining Rings E7 Bolts

E8 bushing E9 snap ring E10 roller bearing E11 thrust bushing

E12 flange

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. In addition, according to the description in this document, those skilled in the art can make corresponding combinations of features in the embodiments in this document and in different embodiments.

Embodiments of the present utility model are as follows, referring to FIGS. 1 to 5 , a tracked vehicle transmission includes a case assembly A, a transmission assembly B, a differential steering assembly C, a final reducer assembly D and an assembly E, the case assembly A , transmission assembly B, differential steering assembly C, final reducer assembly D are connected as a whole through assembly E, the transmission assembly B includes input shaft assembly B1, one shaft assembly B2, two shaft assembly B3, output shaft assembly B4 and Fork assembly B5, the output shaft assembly B4 includes an output shaft B41, an output shaft driven gear B42 and an output shaft driving gear B43, the fork assembly B5 includes a third and fourth gear fork B52 and a first and second gear fork B53, The input shaft assembly B1 is powered with a shaft assembly B2, and the two shaft assemblies B3 are respectively powered with a shaft assembly B2 and an output shaft assembly B4, and the output shaft assembly B4 is connected to the final drive through the differential steering assembly C. The assembly D is connected and can transmit the power to the main reducer assembly D after differential processing. The one-shaft assembly B2 includes a first-shaft B21, a first-shaft driven gear B22, a fourth-speed driving gear B24, and a third- and fourth-speed engaging sleeve B25 , the third and fourth gear spline hub B26, the third gear driving gear B27, the second gear driving gear B28, the first gear driving gear B29 and the HST driving bevel gear B210, the first shaft driven gear B22, the second gear driving gear B28, the first gear The driving gear B29, the third- and fourth-speed spline hub B26 and the HST driving bevel gear B210 are fixed on a shaft B21, the fourth-speed driving gear B24 and the third-speed driving gear B27 are idle on the first shaft B21, and the two-shaft assembly B3 includes high and low gear spline hub B32, high and low gear joint sleeve B33, fourth gear driven gear B34, third gear driven gear B35, second gear driven gear B36, first and second gear joint sleeve B37, first and second gear spline hub B38 , the first-speed driven gear B39 and the second-speed driven gear B310, the second-speed driven gear B36, the first-speed driven gear B39 are idle on the second-speed B310, the fourth-speed driven gear B34, the third-speed driven gear B35 The first and second gear spline hubs B38 are fixed on the second shaft B310, the third and fourth gear spline hubs B26 are arranged between the fourth gear drive gear B24 and the third gear drive gear B27, and the first and second gear spline hubs B38 are arranged Between the second-speed driven gear B36 and the first-speed driven gear B39, the fourth-speed driving gear B24, the third-speed driving gear B27, the second-speed driving gear B28, and the first-speed driving gear B29 are respectively driven with the fourth-speed driving gear B29. Gear B34, the third-speed driven gear B35, the second-speed driven gear B36, and the first-speed driven gear B39 are meshed, and the third- and fourth-speed engaging sleeve B25 is sleeved on the third- and fourth-speed spline hub B26 through splines and can be along the spline hub B26. The third and fourth gear spline hubs B26 slide back and forth, and the first and second gear engaging sleeves B37 are fitted on the first and second gear spline hubs B38 through splines and can slide back and forth along the first and second gear spline hubs B38. The shift fork B52 can drive the third and fourth gear engaging sleeves B25 to move along the third and fourth gear spline hub B26 and realize the third and fourth gear engaging sleeves B25 and the fourth gear. The first and second gear shift fork B53 can drive the first and second gears engaging sleeve B37 to move along the first and second gear spline hub B38 and realize the first and second gear engaging sleeve B37 Meshing with the second-speed driven gear B36 or the first-speed driven gear B39, the differential steering assembly C includes a left differential assembly C1 and a right differential assembly C2 with the same structure, a worm C3, a HST driven bevel gear C4, HST transmission C5, the left differential assembly C1 includes a planetary gear transmission mechanism composed of a left sun gear C12, a left planetary gear C13, a left planet carrier C16, a left ring gear C14, a left worm gear C15, and a left split gear C11. The The left worm gear is arranged outside the left ring gear, the worm C3 meshes with the left worm gear C15 of the left differential assembly C1 and the right worm gear C25 of the right differential assembly C2, and the worm C3 is meshed with the left worm gear C15 right worm gear and C25 to form a worm gear assembly, the output shaft driving gear B43 meshes with the left splitter gear C11 of the left differential assembly C1 and the left splitter gear C21 of the right differential assembly C2 respectively, the HST driving bevel gear B210 is provided in the HST transmission On the input shaft of C5, the HST driven bevel gear C4 is in constant mesh with the HST driving bevel gear B210, and the output end of the HST transmission C5 is connected to the worm C3.

Assembly E includes end cover E1, sealing ring E2, deep groove ball bearing E3, angular contact bearing E4, needle roller bearing E5, retaining ring E6, bolt E7, bushing E8, snap ring E9, roller bearing E10, thrust The shaft sleeve is composed of E11 and flange E12.

The principle of straight-line running of tracked vehicles: when the HST transmission is in the zero-speed position, that is, when the HST does not output rotational speed externally. At this time, the worm C3 does not rotate. Since the worm C3 does not rotate, the left and right worm gears C16 and C26 also do not rotate, so the left and right gears C14 and C24 also do not rotate. At this time, the rotational speed of the power transmitted to the left and right driving bevel gears C17 and C27 is the same. . In the opposite direction, with the cooperation of the main deceleration assembly D, the tracked vehicle can move forward in a straight line and in reverse.

Crawler vehicle differential steering principle: When the HST transmission is in a non-zero position, the HST outputs the external speed, and the worm C3 rotates at this time. Because the worm C3 rotates, the left and right worm gears C16 and C26 rotate. Since the helical directions of the two sets of worm gears of the worm C3 are opposite, the left and right worm gears C16 and C26 rotate in opposite directions at the same speed under the action of the worm C3. Since the left and right sun gears C12 and C22 rotating to the left and right differential assemblies C1 and C2 have the same rotational speed and the same direction, after the planetary gear mechanism is compounded, the rotation trend of the left and right planet carriers C16 and C26 changes, one accelerates forward, the other Decelerate and retreat, so that the input speed of the track on both sides of the tracked vehicle changes, and then the tracked vehicle is turned. The direction of the external output speed of the HST is different, and the corresponding direction of the tracked vehicle is also different. The absolute value of the speed is the same as the input speed, so when the HST is at constant speed and unequal output speed, the left and right crawler tracks can obtain the same motion law.

The first and second gear shifting principle: the first and second gear engaging sleeve B37 is in the middle position to realize the neutral gear between the first and second gears. Operate the first and second gear shift fork B53 to move the first and second gear engaging sleeve B37 backward, so that the inner spline of the first and second gear engaging sleeve B37 is combined with the external spline of the first gear driven gear B39, and the power is transmitted by the first gear driving gear B28 To the first-speed driven gear B39, it is transmitted to the first- and second-speed spline hub B37 through the external splines of the first-speed driven gear B39, and then to the first- and second-speed spline hub B38, so as to be transmitted to the second shaft B310. Turn one stop. Operate the first and second gear shift fork B53 to move the first and second gear engaging sleeve B37 forward, so that the inner spline of the first and second gear engaging sleeve B37 is combined with the external spline of the second gear driven gear B36, and the power is transmitted by the second gear driving gear B27. To the second-speed driven gear B36, it is transmitted to the first- and second-speed spline hub B37 through the external splines of the second-speed driven gear B36, and then to the first- and second-speed spline hub B38, so as to be transmitted to the second shaft B310. Turn the second gear.

The shifting principle of the third and fourth gears: the third and fourth gear engaging sleeve B25 is in the middle position to realize the neutral gear between the third and fourth gears. Operate the third and fourth gear shift fork B52 to move the third and fourth gear engaging sleeve B25 backward, so that the internal spline of the third and fourth gear engaging sleeve B25 is combined with the external spline of the third gear driving gear B27, and the power is driven by the third and fourth gear spline hub B26 , the third- and fourth-speed engaging sleeve B25, the third-speed driving gear B26 is transmitted to the third-speed driven gear B35, which is then transmitted to the second shaft B310, and the second shaft B310 rotates in the third gear. Operate the third and fourth gear shift fork B52 to move the third and fourth gear engaging sleeve B25 forward, so that the internal spline of the third and fourth gear engaging sleeve B25 is combined with the external spline of the fourth gear driving gear B24, and the power is driven by the third and fourth gear spline hub B26 , the third and fourth gears engage the sleeve B25, the fourth gear driving gear B24 is transmitted to the fourth gear driven gear B34, and thus is transmitted to the second shaft B310, and the second shaft B310 rotates in the fourth gear.

On the basis of the above-mentioned embodiment, in another embodiment of the present invention, as shown in FIG. 2 , the shift fork assembly B5 further includes a high- and low-speed shift fork B51, and a low-speed driving gear B23 is fixed on the first shaft B21. The two-shaft assembly B2 also includes a low-speed driven gear B31 and a high- and low-speed spline hub B32, the low-speed driving gear B23 meshes with the low-speed driven gear B31, and the low-speed driven gear B31 and the high and low speed spline hubs B32 is vacantly sleeved on the two shafts B310, and the high and low gear joint sleeve B33 is sleeved on the high and low gear spline hub B32 through splines and can slide along the high and low gear spline hub B32, which is set on the high and low gear spline hub B32. Between the low-speed driven gear B31 and the fourth-speed driven gear B34, the high- and low-speed shift fork B51 can drive the high- and low-speed engagement sleeve B33 to move along the high and low-speed splined hub B32 and realize the high-low gear engagement sleeve B33 and the Meshing between the fourth-speed driven gear B34 or the low-speed driven gear B31.

High and low gear shifting principle: High and low gear engaging sleeve B33 is in the middle position to achieve neutral gear between high and low gears. Operate the high and low gear shift fork B51 to move the high and low gear engaging sleeve B33 backward, and the internal spline of the high and low gear engaging sleeve B33 is combined with the external spline of the fourth-speed driven gear B34. On the second shaft B310, therefore, the essence of combining the internal splines of the high and low gear joint sleeve B33 with the external splines of the fourth gear driven gear B34 is to combine the high and low gear spline hub B32 with the two shafts B310. At this time, the high and low gear engaging sleeve B33 is output in high gear. Operate the high and low gear shift fork B51 to move the high and low gear engaging sleeve B33 forward, the internal spline of the high and low gear engaging sleeve B33 is combined with the external spline of the low gear driven gear B31, because the fourth gear driving gear B24 and the low gear driving gear B23 Connected as a whole, the low-speed driving gear B23 is constantly meshed with the low-speed gear B31. The transmission route is: the fourth-speed driven gear B34, to the fourth-speed driving gear B24, to the low-speed driving gear B23, to the low-speed driven gear B31, and the high-low-speed engaging sleeve B33. At this time, the high and low gear engaging sleeve B33 is output in a low gear.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in Figures 3 to 5, the left differential assembly C1 further includes a left driving bevel gear C17, a left sun gear shaft C18, and the left planetary gear shaft is connected to the left planet carrier. Plate, the left shunt gear C11 and the left sun gear C12 are sleeved on the left sun gear shaft C18 through splines, and 2 to 4 evenly distributed left planetary gear shafts are installed on the left planet carrier C16, and the left planetary gear shafts pass through There is a left planetary gear C13 in the empty bushing, the left planetary gear C13 is positioned by clearance fit between the left planetary carrier C16 and the left planetary carrier connecting plate C110, and the left ring gear C14 is respectively supported on the left sun gear shaft by the deep groove ball bearing E3 On C18 and the left planet carrier C16, the left driving bevel gear C17 is the shaft gear, and the middle is supported on the box A1 by the angular contact bearing E4, and the other end is fitted with the left planet carrier C16 through the spline.

On the basis of the above-mentioned embodiment, in another embodiment of the present invention, as shown in FIG. 3 and FIG. 4 , the final deceleration assembly D includes a left main deceleration assembly D1 and a right main deceleration assembly D2 with the same main structure. The main reduction assembly D1 includes a left output shaft D11, a left forward driven bevel gear D12, a left coupling sleeve D13, a left splined hub D14 and a left reverse driven bevel gear D15, the left output shaft D11 is provided by an angular contact bearing E4 On the box body A1, the left forward driven bevel gear D12 and the left reverse driven bevel gear D15 are hollowly sleeved on the left output shaft D11 through the shaft sleeve E8, the left forward driven bevel gear D12, the left reverse driven bevel gear D12 The driven bevel gear D15 is in constant mesh with the left driving bevel gear C17, the left spline hub D14 is sleeved on the left output shaft D11 through splines, and the left sleeve D13 is sleeved on the left spline hub D14 through splines. Slide left and right on left spline hub D14.

Forward gear: the left coupling sleeve D13 slides to the left, the left coupling sleeve D13 meshes with the left spline hub D14 and the external splines of the left forward driven bevel gear D12 at the same time, and the power is transmitted from the left driving bevel gear C17 to the left forward driven cone The gear D12 is then transmitted to the left coupling sleeve D13, to the left splined hub D14, to the left output shaft D11. At the same time, the right coupling sleeve D23 slides to the left, the right coupling sleeve D23 meshes with the right spline hub D24 and the external splines of the right forward driven bevel gear D22 at the same time, and the power is transmitted from the right driving bevel gear C27 to the right forward driven bevel gear D22 , and then transmitted to the right adapter sleeve D23, to the right spline hub D24, to the right output shaft D21.

Reverse gear: the left engaging sleeve D13 slides to the right, the left engaging sleeve D13 meshes with the left spline hub D14 and the external splines of the left reverse driven bevel gear D15 at the same time, and the power is transmitted from the left driving bevel gear C17 to the left reverse gear. The moving bevel gear D15 is then transmitted to the left coupling sleeve D13, to the left spline hub D14, and to the left output shaft D11. At the same time, the right coupling sleeve D23 slides to the right, the right coupling sleeve D23 meshes with the right spline hub D24 and the external splines of the right reverse driven bevel gear D25 at the same time, and the power is transmitted from the right driving bevel gear C27 to the right reverse driven cone. The gear D25 is then transmitted to the right sleeve D23, to the right spline hub D24, to the right output shaft D21.

On the basis of the above-mentioned embodiment, in another embodiment of the present invention, as shown in FIG. 4 , one end of the left output shaft D11 outputs power to the outside, and the other end is hollowly sleeved on the right output shaft D21 through the shaft sleeve E8. One end of the shaft D21 outputs power to the outside, a right thrust bearing E12 is arranged between the left output shaft and D11 and the right output shaft D21, and a right thrust sleeve E11 is arranged on the left output shaft and D11 and the right output shaft D21, so Thrust bushings E11 are provided on both sides of the left spline hub D14 and the right spline hub D24.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in FIGS. 1 and 2 , the input shaft assembly B1 includes an input shaft driving gear B11 and an input shaft B12, and the input shaft driving gear B11 passes through the The key is sleeved on the input shaft B12, and the two ends of the input shaft B12 are respectively supported on the box A1 through the deep groove ball bearings E3. The input shaft B12 is positioned close to the clutch end using the end cover E1, and the end cover E1 is provided with a seal Ring E2, the other end of the input shaft B12 is positioned with the two shafts through the retaining ring E6, one end of the input shaft B12 is connected to the spline of the clutch driven plate and outputs the power to the one shaft driven gear B22 through the input shaft driving gear B12.

On the basis of the above-mentioned embodiment, in another embodiment of the present invention, as shown in FIG. 2 , the fourth-speed driving gear B24 and the third-speed driving gear B27 are hollowly sleeved on a shaft B21 through the shaft sleeve F8, and the low The driven gear B31 and the high and low gear spline hub B32 are sleeved on the second shaft B310 through the needle roller bearing E5. The fourth-speed driven gear B34 and the third-speed driven gear B35 are sleeved on the second shaft B310 through splines. The second-speed driven gear B36 and the first-speed driven gear B39 are vacantly sleeved on the second shaft B310 through the shaft sleeve E8.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in FIG. 2 , the one-shaft assembly B2 further includes a power output connecting sleeve B211 and a power output shaft B212, and one end of the one shaft B21 is connected through the power output The sleeve B211 is connected to the power output shaft B212. The power output shaft B212 is mounted on the box body A1 through the deep groove ball bearing E3 and outputs power to the outside through the flange E12.

On the basis of the above-mentioned embodiment, in another embodiment of the present utility model, as shown in FIG. 2 , between the first-speed driven gear B39 and the deep groove ball bearing E8, the third-speed driven gear B35 and the second-speed driven gear B36 Between the fourth gear driven gear B34 and the high and low gear spline hub B32, and between the low gear B31 and the deep groove ball bearing E8 are positioned by the thrust bushing E11.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in FIG. 2 , the output shaft driven gear B42 is sleeved on the output shaft B41 through splines, and the output shaft driven gear B42 is engaged with the high and low gears. The external teeth on the sleeve B33 are meshed, the output shaft driven gear B42 is a wide gear, and the high and low gear engaging sleeve B33 is always meshed with the output shaft driven gear B42 in neutral, high and low gears.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. These improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (10)

1. A tracked vehicle transmission, characterized in that it comprises a case assembly, a transmission assembly, a differential steering assembly, a final drive assembly and an assembly, the case assembly, transmission assembly, differential steering assembly, and final drive assembly Connected as a whole through fittings, the transmission assembly includes an input shaft assembly, a one-shaft assembly, a two-shaft assembly, an output shaft assembly and a shift fork assembly, and the output shaft assembly includes an output shaft, an output shaft driven gear and an output shaft drive Gear, the shift fork assembly includes a third- and fourth-speed shift fork and a first- and second-speed shift fork, the input shaft assembly is dynamically connected with the first shaft assembly, and the two shaft assemblies are respectively dynamically connected with the first shaft assembly and the output shaft assembly, so The output shaft assembly is connected with the main reducer assembly through the differential steering assembly and can transmit the power to the main reducer assembly after differential processing. , Third- and fourth-speed engaging sleeve, third- and fourth-speed spline hub, third-speed driving gear, second-speed driving gear, first-speed driving gear and HST driving bevel gear, the first-shaft driven gear, second-speed driving gear, first-speed driving gear The gear, the third- and fourth-speed spline hub and the HST driving bevel gear are fixed on a shaft, the fourth-speed driving gear and the third-speed driving gear are idle on a shaft, and the two-shaft assembly includes a high- and low-speed spline hub, a high-low gear gear joint sleeve, fourth gear driven gear, third gear driven gear, second gear driven gear, first and second gear joint sleeve, first and second gear spline hub, first gear driven gear and second shaft, the second gear driven gear The gear and the first gear driven gear are idle on the second shaft, the fourth gear driven gear, the third gear driven gear, the first and second gear spline hubs are fixed on the second shaft, and the third and fourth gear spline hubs are arranged on the second shaft. Between the fourth gear driving gear and the third gear driving gear, the first and second gear spline hubs are arranged between the second gear driven gear and the first gear driven gear, the fourth gear driving gear, the third gear driving gear, the second gear The driving gear and the first-speed driving gear mesh with the fourth-speed driven gear, the third-speed driven gear, the second-speed driven gear, and the first-speed driven gear respectively, and the third- and fourth-speed engaging sleeves are mounted on the spline sleeves. The third and fourth gear spline hubs can slide along the third and fourth gear spline hubs. The third and fourth gear shift forks can drive the third and fourth gear engaging sleeves to move along the third and fourth gear spline hubs and realize the meshing between the third and fourth gear engaging sleeves and the fourth gear driving gear or the third gear driving gear. The second-speed shift fork can drive the first- and second-speed engaging sleeves to move along the first- and second-speed spline hubs and realize the meshing of the first- and second-speed engaging sleeves with the second-speed driven gear or the first-speed driven gear. The differential steering assembly includes: Left differential assembly and right differential assembly with the same structure, worm, HST driven bevel gear, HST transmission, the left differential assembly includes a planet consisting of a left sun gear, a left planet gear, a left planet carrier, and a left ring gear A gear transmission mechanism, a left worm gear and a left split gear, the left worm gear is arranged on the outer side of the left ring gear, the worm is meshed with the left worm gear of the left differential assembly and the right turbine of the right differential assembly, the The worm and the left worm gear and the right worm gear form a worm gear and worm assembly, and the output shaft driving gear is respectively connected with the left of the left differential assembly. The split gear meshes with the left split gear of the right differential assembly, the HST driving bevel gear is arranged on the input shaft of the HST transmission, the HST driven bevel gear is constantly meshed with the HST driving bevel gear, and the output end of the HST transmission connected to the worm. 2 . The tracked vehicle transmission according to claim 1 , wherein the shift fork assembly further comprises a high- and low-speed shift fork, a low-speed driving gear is fixed on the one shaft, and the two-shaft assembly further comprises a low-speed gear. 3 . The driven gear and the high and low gear spline hubs, the low gear driving gear meshes with the low gear driven gear, the low gear driven gear and the high and low gear spline hubs are vacantly sleeved on the two shafts, and the high and low gear engaging sleeves The high and low gear spline hubs are sleeved on the high and low gear spline hubs through splines and can slide along the high and low gear spline hubs. The high and low gear spline hubs are arranged between the low gear driven gear and the fourth gear driven gear. The shift fork can drive the high and low gear engaging sleeves to move along the high and low gear spline hubs and realize the meshing between the high and low gear engaging sleeves and the fourth gear driven gear or the low gear driven gear. 3. The tracked vehicle transmission according to claim 1 or 2, wherein the left differential assembly further comprises a left driving bevel gear, a left sun gear shaft, a left planetary gear shaft and a left planet carrier connecting plate, and the left splitter The gear and the left sun gear are sleeved on the left sun gear shaft through splines, and 2 to 4 evenly distributed left planetary gear shafts are installed on the left planet carrier. The left planetary gear is positioned by clearance fit between the left planetary carrier and the left planetary carrier connecting plate, the left ring gear is respectively supported on the left sun gear shaft and the left planetary carrier by the deep groove ball bearing, and the left driving bevel gear is a shaft gear, passing through the middle. The other end of the angular contact bearing is supported on the box body and sets the left planet carrier through the spline. 4 . The tracked vehicle transmission according to claim 3 , wherein the final gear assembly includes a left final reduction assembly and a right final reduction assembly with the same main structure, and the left final reduction assembly includes a left output shaft, a left main reduction The forward driven bevel gear, the left coupling sleeve, the left spline hub and the left reverse driven bevel gear, the left output shaft is arranged on the box through an angular contact bearing, the left forward driven bevel gear, the left reverse driven bevel gear are The moving bevel gear is hollowly sleeved on the left output shaft through the shaft sleeve, the left forward driven bevel gear and the left reverse driven bevel gear are constantly meshed with the left driving bevel gear, and the left spline hub is sleeved on the left output shaft through a spline. On the left output shaft, the left joint sleeve is sleeved on the left spline hub through splines and can slide left and right on the left spline hub. 5 . The tracked vehicle transmission according to claim 4 , wherein one end of the left output shaft outputs power to the outside, the other end is sleeved on the right output shaft through a bushing, and one end of the right output shaft outputs power to the outside. 6 . , a right thrust bearing is arranged between the left output shaft and the right output shaft, a right thrust sleeve is arranged on the left output shaft and the right output shaft, and a thrust is arranged on both sides of the left spline hub and the right spline hub Axle sleeve. 6 . The tracked vehicle transmission according to claim 4 , wherein the input shaft assembly comprises an input shaft driving gear and an input shaft, the input shaft driving gear is sleeved on the input shaft through splines, and the input shaft The two ends of the shaft are respectively supported on the box by deep groove ball bearings. The input shaft is positioned near the clutch end using an end cover. The end cover is provided with a sealing ring. The other end of the input shaft is positioned with the two shafts through a retaining ring. One end of the shaft is connected to the spline of the clutch driven plate and outputs the power to a driven gear of a shaft through the input shaft driving gear. 7 . The tracked vehicle transmission according to claim 6 , wherein the fourth-speed driving gear and the third-speed driving gear are hollowly sleeved on a shaft through a bushing, and the low-speed driven gear and the high- and low-speed spline hubs pass through the shaft. 8 . The needle roller bearing is sleeved on the second shaft, the fourth-speed driven gear and the third-speed driven gear are sleeved on the second shaft through splines, and the second-speed driven gear and the first-speed driven gear are sleeved through the shaft sleeve. on the second axis. 8 . The tracked vehicle transmission according to claim 6 , wherein the one-shaft assembly further comprises a power output connecting sleeve and a power output shaft, and one end of the one shaft is connected to the power output shaft through the power output connecting sleeve, so the The power output shaft is mounted on the box body through a deep groove ball bearing and outputs power to the outside through a flange. 9 . The tracked vehicle transmission according to claim 6 , wherein between the first-speed driven gear and the deep groove ball bearing, between the third-speed driven gear and the second-speed driven gear, the fourth-speed driven gear Thrust bushings are used for positioning between the gears and the high- and low-speed spline hubs, and between the low-speed gears and the deep groove ball bearings. 10 . The tracked vehicle transmission according to claim 9 , wherein the output shaft driven gear is sleeved on the output shaft through splines, and the output shaft driven gear meshes with external teeth on the high and low gear engagement sleeves. 11 . , The output shaft driven gear is a wide gear, and the high and low gear engaging sleeves are constantly meshed with the output shaft driven gear in neutral gear, high gear and low gear.

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