CN106641127B

CN106641127B - 8-gear special vehicle transmission

Info

Publication number: CN106641127B
Application number: CN201611132268.6A
Authority: CN
Inventors: 陈小国; 孙智金
Original assignee: Shaanxi Fast Auto Drive Group Co Ltd
Current assignee: Shaanxi Fast Auto Drive Group Co Ltd
Priority date: 2016-12-09
Filing date: 2016-12-09
Publication date: 2023-03-14
Anticipated expiration: 2036-12-09
Also published as: CN106641127A

Abstract

The invention provides an 8-gear special vehicle transmission which comprises an input shaft, an intermediate shaft, a secondary shaft, a left rear intermediate shaft and a right rear intermediate shaft, wherein the main shaft is provided with 9 main shaft gears, 8 forward gears and a reverse gear based on the actual use working condition design of a mining vehicle, and the overdrive gear ratio is less than 0.7; the system comprises an overdrive gear with a low speed ratio value, has high empty speed, and meets the requirement of a user on the empty load driving efficiency; the first gear speed ratio is large, the full-load bearing capacity is large, and the climbing capacity is strong; the structure is simple, and the reliability is high; the 7DS transmission has the advantages of high reliability and high bearing capacity, and simultaneously has an overdrive gear with the speed ratio lower than 0.7, thereby meeting the requirement of no-load high speed of the mining vehicle.

Description

8-gear special vehicle transmission

Technical Field

The invention belongs to the field of vehicle transmissions, and relates to an 8-gear special vehicle transmission.

Background

The manual transmission of the mining vehicle is developed from a road vehicle transmission to a special vehicle transmission, the current market of the mining vehicle has urgent requirements on a high-torque 8-gear transmission with an overdrive gear, and no 8-gear high-torque mining vehicle special transmission meeting the requirements is available at home and abroad at present.

The common 8-gear heavy-duty transmission adopts a 4X2 structure and is used on a mining vehicle, and the synchronizer of the auxiliary box has frequent gear shifting and poor reliability; the transmissions with more gears are used on the mining vehicle, except for poor reliability of the auxiliary box synchronizer, the transmissions have more gears, frequent gear shifting and easy driving fatigue, and meanwhile, practice proves that the transmissions with more gears on the mining vehicle have frequent gear shifting, large vehicle speed loss and larger oil consumption; from the matching situation of the transmissions on the conventional mining vehicle, the single-box transmission has lower failure rate and better reliability than the main and auxiliary box structures; the single case transmission is also more advantageous in terms of cost.

The existing mining vehicle is limited by the structure, has no overdrive, cannot take into account the advantages of high speed of an empty vehicle, large full-load bearing capacity, strong climbing capacity and the like, has great speed ratio range and is limited when being used on a heavy mining vehicle.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the 8-gear special vehicle transmission which adopts a single-box double-intermediate-shaft structure, has the advantages of high use reliability, high bearing capacity, strong climbing capacity and the like, and simultaneously considers the requirement of high no-load speed.

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

a8-gear special vehicle transmission comprises an input shaft, an intermediate shaft, a secondary shaft, a left rear intermediate shaft and a right rear intermediate shaft; the input shaft and the two shafts are coaxially arranged, and an input shaft driving gear is arranged on the input shaft; the second shaft is a main shaft of the transmission, and a spline gear, a second shaft six-gear, a second shaft eight-gear, a second shaft five-gear, a second shaft four-gear, a second shaft three-gear, a second shaft two-gear, a second shaft first-gear, a second shaft reverse gear and a driven wheel of the transmission are sleeved on the main shaft; sliding sleeves are respectively arranged between a second shaft reverse gear and a second shaft first gear, between a second shaft second gear and a second shaft third gear, between a second shaft fourth gear and a second shaft fifth gear, between a second shaft sixth gear and an input shaft driving gear, a first one-way gear engaging sliding sleeve is arranged between a second shaft eighth gear and a second shaft sixth gear, and a second one-way gear engaging sliding sleeve is arranged on one side of a retarder driven wheel;

two symmetrical left and right middle shaft assemblies are arranged on two sides of the main shaft, the left middle shaft assembly consists of a middle shaft and a left rear middle shaft, the right middle shaft assembly consists of a middle shaft and a right rear middle shaft, and gears which are normally meshed with an input shaft driving gear on the input shaft and gears at various gears on the secondary shaft are fixedly connected to the middle shaft and the right rear middle shaft respectively; the right rear intermediate shaft drives the power takeoff to rotate, and the retarder driven wheel is normally meshed with the retarder input gear;

further, the sliding sleeve is a reverse taper tooth sliding sleeve.

Furthermore, the rear end of the right rear intermediate shaft is provided with an external spline and extends into an internal spline of the power takeoff to drive the power takeoff to rotate.

Furthermore, the tail end of the middle shaft is provided with an internal spline, the front ends of the left rear middle shaft and the right rear middle shaft are external involute splines, the front ends of the left rear middle shaft and the right rear middle shaft are supported in the internal spline at the tail end of the middle shaft through splines, and the rear ends of the left rear middle shaft and the right rear middle shaft are supported on the shell of the rear cover of the transmission.

And a second-shaft eight-gear is further arranged on the third row of the transmission, and the gear shifting direction is consistent with the even-numbered gears.

The invention has the following advantages:

the invention relates to a transmission of a special 8-gear vehicle, which comprises an input shaft, an intermediate shaft, a secondary shaft, a left rear intermediate shaft and a right rear intermediate shaft, and is designed based on the actual use working condition of a mining vehicle, wherein 9 main shaft gears, 8 forward gears and one reverse gear are arranged on a main shaft, and the speed ratio of an overdrive gear is less than 0.7; the system comprises an overdrive gear with a low speed ratio value, has high empty speed, and meets the requirement of a user on the empty load driving efficiency; the first gear ratio is large, the full load bearing capacity is large, and the climbing capacity is strong; the structure is simple, and the reliability is high; the 7DS transmission has the advantages of high reliability and high bearing capacity, and simultaneously has an overdrive gear with the speed ratio lower than 0.7, so that the requirement of no-load high speed of the mining vehicle is met. External cooling equipment can be additionally arranged, and the working condition adaptability is high.

The intermediate shaft is designed in a segmented mode between the first gear and the second gear, and an intermediate support is added at the segmented position, so that the rigidity of the intermediate shaft is improved; the large-cone-angle sliding sleeve is adopted for manual gear shifting, the speed ratio (overdrive gear and direct gear, 7 gear and 8 gear) at two ends is large in range, the intermediate speed ratio is small in range, the design is specific to the working condition of a mining truck, the gear shifting between main working gears is light, and the reliability is good; different from the arrangement of the gears of a common 8-gear transmission, the first gear and the reverse gear are controlled by one shifting fork shaft, and the overdrive gear is controlled by one shifting fork shaft independently; in order to match with the gear arrangement, when the assembly is arranged, the overdrive gear and a common transmission are arranged in a second row, the overdrive gear is arranged in a third row of the transmission, and the gear shifting direction is consistent with even gears; the rear power takeoff is integrated, a hydraulic retarder is connected in parallel, a hydraulic retarder rotation control mechanism is arranged, and the rear power takeoff is designed in an integrated structure, so that the rear power takeoff is convenient to transport, assemble and disassemble.

Drawings

FIG. 1 is a schematic structural diagram of a single-box 8-gear special vehicle transmission

FIG. 2 is a schematic diagram of the shift positions of the lateral shift lever of the present invention

Wherein: 1. an input shaft; 2. an intermediate shaft; 3. two axes; 5. a left rear intermediate shaft; 6. a right rear intermediate shaft; 7. a retarder driven wheel; 8. a retarder input gear; 9. a reverse countershaft gear; 10. a two-shaft reverse gear; 11. a two-shaft first-gear; 12. a biaxial second-speed gear; 13. a second shaft third gear; 14. a second shaft fourth gear; 15. a second shaft five-speed gear; 16. a second shaft six-gear; 17. an input shaft driving gear; 18. a two-shaft eight-gear; 22. a countershaft second gear wheel; 23. a middle shaft three-gear; 24. a countershaft fourth gear; 25. a countershaft fifth gear; 26. a countershaft six-speed gear; 27. a middle shaft transmission gear; 28. an intermediate shaft eight-gear; H1. a sliding sleeve; H2. a first one-way shift sliding sleeve; H3. the second unidirectional gear sliding sleeve.

Detailed Description

The whole structure and working process of the invention are described in detail below with reference to the accompanying drawings:

as shown in figure 1, the 8-gear automobile transmission has a single-box double-intermediate-shaft structure, 8 forward gears and 1 reverse gear, adopts a large-cone-angle sliding sleeve to manually shift gears, is standard-matched with a parallel hydraulic retarder and a rear power takeoff. The main box comprises an input shaft 1 and a secondary shaft 3, wherein the input shaft 1 is provided with an input shaft driving gear 17, the secondary shaft 3 is a transmission main shaft, and the main shaft is provided with 9 main shaft gears which comprise a retarder driven wheel 7, a secondary shaft reverse gear 10, a secondary shaft first gear 11, a secondary shaft second gear 12, a secondary shaft third gear 13, a secondary shaft fourth gear 14, a secondary shaft fifth gear 15, a secondary shaft sixth gear 16 and a secondary shaft eighth gear 18;

except the retarder driven wheel 7, a second shaft reverse gear 10 and the rest are main shaft forward gear gears, sliding sleeves H1 are respectively arranged between the second shaft reverse gear 10 and a second shaft first gear 11, between a second shaft second gear 12 and a second shaft third gear 13, between a second shaft fourth gear 14 and a second shaft fifth gear 15, between a second shaft sixth gear 16 and an input shaft driving gear 17, a first one-way gear-engaging sliding sleeve H2 is arranged between a second shaft eight-gear 18 (overdrive) and the second shaft sixth gear 16, and a second one-way gear-engaging sliding sleeve H3 is arranged in front of the retarder driven wheel 7; the sliding sleeve H1 is an inverted cone tooth sliding sleeve.

Two symmetrical middle shaft assemblies are arranged on two sides of the main shaft, the left middle shaft assembly consists of a middle shaft 2 and a left rear middle shaft 5, the middle shaft 2 and the left rear middle shaft 5 are fixedly connected with middle shaft gears which are respectively and normally meshed with an input shaft driving gear 17 on the input shaft 1 and gears of all gears which are sleeved on the secondary shaft 3, comprises a middle shaft second gear 22, a middle shaft third gear 23, a middle shaft fourth gear 24 a countershaft fifth-gear 25, a countershaft sixth-gear 26, a countershaft drive gear 27, and a countershaft eighth-gear 28; the right intermediate shaft assembly consists of an intermediate shaft 2 and a right rear intermediate shaft 6, and intermediate shaft gears which are normally meshed with an input shaft driving gear 17 on the input shaft 1 and gears of various gears sleeved on the secondary shaft 3 are fixedly connected to the intermediate shaft 2 and the right rear intermediate shaft 6 respectively; the tail end of the intermediate shaft 2 is provided with an internal spline, the front ends of the rear

intermediate shafts

5 and 6 are external involute splines, the front ends of the rear

intermediate shafts

5 and 6 are supported in the internal spline at the tail end of the intermediate shaft 2 through splines, an intermediate shaft transmission gear 27 is normally meshed with an input shaft driving gear 17, other gears of the intermediate shaft are normally meshed with corresponding gears of the main shaft, the front ends of the input shaft and the intermediate shaft are respectively supported on a main box body through bearings, the rear end of the intermediate shaft 2 is supported on a middle support of a main box shell through a bearing, the front ends of the left rear intermediate shaft 5 and the right rear intermediate shaft 6 are supported on the corresponding internal spline at the rear end of the intermediate shaft 2 through external splines, and the rear ends are supported on a rear cover shell through bearings; the external spline at the rear end of the right rear intermediate shaft 6 extends into the internal spline of the power takeoff to drive the power takeoff to rotate, and the retarder driven wheel 7 is constantly meshed with the retarder input gear 8.

As shown in fig. 2, the working process of the transmission of the 8-gear special vehicle is as follows: the power of the engine is transmitted to the input shaft 1 of the transmission and the input shaft drive gear 17 through the clutch. The input shaft driving gear 17 is constantly meshed with a middle shaft driving gear 27 to drive the middle shaft 2,

other gear gears

24, 25, 26, 27, 28 of the middle shaft and

shaft teeth

22 and 23 of the middle shaft, shaft teeth of

rear middle shafts

5 and 6 are constantly meshed with

gear gears

11, 12, 13, 14, 15, 16 and 18 of the main shaft respectively, shaft teeth of the

rear middle shafts

5 and 6 are meshed with a corresponding reverse middle shaft gear 9 respectively, the reverse middle shaft gear 9 is meshed with a two-shaft reverse gear 10, and the other gears of the two shafts are main shaft forward gear gears and idle on the two shafts 3 when in no-load. Because the internal teeth of the inverted cone sliding sleeves are connected with the two shafts through splines, the gear shifting fork straddles each inverted cone sliding sleeve, the gear shifting fork shafts are moved to drive the gear shifting fork, the sliding sleeves move along with the fork, and when the combined inverted cone teeth of the sliding sleeves are combined with the internal inverted cone teeth of the main shaft gear, the two shafts 3 and the two shafts gear are integrated and rotate according to a certain speed ratio to transmit power and are output through the flange plate.

When the power takeoff is required to work, a power takeoff switch is turned on, the power takeoff is geared, power is transmitted in through the right rear intermediate shaft, and the power is output through a power takeoff flange.

The overdrive gear is arranged on the third row of the transmission, and the gear engaging direction is consistent with even gears.

In the process of vehicle delivery or transition, the speed is overgeared, the rotating speed of the second shaft is high, the second one-way gear-engaging sliding sleeve H3 of the retarder is engaged forwards, the driven wheel 7 of the retarder freely rotates, and the retarder can not work and can not rotate; after the car arrives the mining area, the manual engage gear device in manipulation derailleur rear end, drag the one-way engage gear sliding sleeve H3 of retarber second and move backward, retarber driven wheel 7 and two axle 3 are even as an organic whole, when the vehicle travel, the derailleur flange rotates, the flange drives two axle 3 and rotates, two axle 3 drives retarber driven wheel 7 and rotates, retarber driven wheel 7 drive retarber input wheel 8 rotates, the brake force that the retarber produced passes through retarber input wheel 8 and transmits for retarber driven wheel 7, and then restrain two axle rotations, play the auxiliary braking effect.

The power takeoff is used for taking power through a right rear intermediate shaft of the main box, is irrelevant to the gear of the transmission, and is independently operated through a control handle (or a button) of a cab. The lubricating oil pump is driven by the input shaft of the power takeoff, and can work as long as the transmission has input, so that lubrication is provided for key parts of the transmission.

The foregoing is a more detailed description of the invention and it is not intended that the invention be limited to the specific embodiments described herein, but that various modifications, alterations, substitutions and equivalents will be apparent to those skilled in the art without departing from the spirit of the invention, and are intended to be within the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an 8 grades of special-purpose vehicle derailleur which characterized in that: comprises an input shaft (1), an intermediate shaft (2), a secondary shaft (3), a left rear intermediate shaft (5) and a right rear intermediate shaft (6);

the input shaft (1) and the two shafts (3) are coaxially arranged, and an input shaft driving gear (17) is arranged on the input shaft (1); the two shafts (3) are main shafts of the speed changer, a second-shaft six-gear (16), a second-shaft eight-gear (18), a second-shaft five-gear (15), a second-shaft four-gear (14) and a spline gear are sleeved on the main shaft a second-shaft third-gear (13), a second-shaft second-gear (12), a second-shaft first-gear (11), a second-shaft reverse gear (10) and a retarder driven wheel (7); between a two-shaft reverse gear (10) and a two-shaft first gear (11), between a two-shaft second gear (12) and a two-shaft third gear (13), between a two-shaft fourth gear (14) and a two-shaft fifth gear (15) on the main shaft, a sliding sleeve (H1) is respectively arranged between the two-shaft six-gear (16) and the input shaft driving gear (17), a first one-way gear-engaging sliding sleeve (H2) is arranged between the two-shaft eight-gear (18) and the two-shaft six-gear (16), and a second one-way gear-engaging sliding sleeve (H3) is arranged on one side of the retarder driven wheel (7); the sliding sleeve (H1) is an inverted cone tooth sliding sleeve;

two symmetrical left and right intermediate shaft assemblies are arranged on two sides of the main shaft, the left intermediate shaft assembly consists of an intermediate shaft (2) and a left rear intermediate shaft (5), the right intermediate shaft assembly consists of an intermediate shaft (2) and a right rear intermediate shaft (6), the intermediate shaft (2) and the left rear intermediate shaft (5) are fixedly connected with gears which are normally meshed with an input shaft driving gear (17) on the input shaft (1) and gears on the secondary shaft (3) respectively;

the right rear intermediate shaft (6) drives the power takeoff to rotate, and the retarder driven wheel (7) is constantly meshed with the retarder input gear (8); the middle shaft (2) is connected with the left rear middle shaft (5) through a spline, the middle shaft (2) is connected with the right rear middle shaft (6) through a spline, and the rear end of the right rear middle shaft (6) is provided with an external spline and extends into an internal spline of the power takeoff to drive the power takeoff to rotate;

the front end and the rear end of the intermediate shaft 2 are supported on a transmission shell through bearings, the tail end of the intermediate shaft (2) is provided with an internal spline, the front ends of the left rear intermediate shaft (5) and the right rear intermediate shaft (6) are provided with external involute splines, the front ends of the left rear intermediate shaft (5) and the right rear intermediate shaft (6) are supported in the internal spline at the tail end of the intermediate shaft (2) through splines, and the rear ends of the left rear intermediate shaft and the right rear intermediate shaft are supported on the transmission rear cover shell;

the two-shaft eight-gear (18) is arranged on the third row of the transmission, and the gear shifting direction is consistent with the even-numbered gears.