CN212073679U

CN212073679U - Independent pump motor driving device of stepless speed change tractor

Info

Publication number: CN212073679U
Application number: CN202020342668.5U
Authority: CN
Inventors: 冯春凌; 史金钟; 王义平; 薛志飞; 鞠超; 董文华; 王炜
Original assignee: Luoyang Tractor Research Institute Co ltd
Current assignee: Luoyang Tractor Research Institute Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-12-04
Anticipated expiration: 2030-03-18

Abstract

The utility model relates to a stepless speed change tractor stand-alone pump motor drive arrangement, including drive housing, HMCVT pump motor, HMCVT pump input assembly and HMCVT motor output assembly are fixed respectively in the drive housing, HMCVT pump motor sets up between HMCVT pump input assembly and HMCVT motor output assembly, and the both ends of HMCVT pump motor are connected respectively on HMCVT pump input assembly and on HMCVT motor output assembly; the mechanical flow from the engine is input to the pump input end of the HMCVT pump motor through the HMCVT pump input assembly, and the hydraulic pressure converted into stepless speed regulation is transmitted to the HMCVT motor output assembly through the motor output end of the HMCVT pump motor. The device is characterized in that the pump, the motor, the pump input gear and the motor output gear are arranged in an independent shell, are connected with the transmission system shell through bolts, are positioned in the transmission system and are independent and integrated, the structure is simple to arrange, and the maintenance of the transmission system is convenient.

Description

Independent pump motor driving device of stepless speed change tractor

Technical Field

The utility model belongs to tractor machine field relates to a stepless speed change tractor stand alone type pump motor drive arrangement.

Background

Through the analysis of the technical data published by the recent European and American mainstream agricultural machinery enterprises, the HMCVT transmission system has been developed into an indispensable option of modern tractors. The hydraulic mechanical power split type continuously variable transmission, namely the HMCVT, applied to the mainstream agricultural tractor enables the dynamic characteristic field of a tractor power device to be optimally matched with the dynamic characteristic field required by the tractor after passing through the continuously variable transmission, so that the efficiency and the productivity of the tractor are improved, and the fuel consumption can be minimized under various working conditions. The tractor adopting the HMCVT has good adaptability to agricultural operation, can greatly meet the requirements of users, is considered as the most ideal agricultural machinery power equipment, the HMCVT is realized by utilizing the cooperation between a planetary gear mechanism and a hydraulic motor, is a novel transmission form with hydraulic power flow and mechanical power flow connected in parallel, realizes high transmission efficiency through mechanical transmission, and utilizes a low-power hydraulic element to ensure that the whole system obtains the characteristic of stepless speed change. The hydraulic transmission and the mechanical transmission are combined to realize the stepless speed change of the hydraulic mechanical transmission, so that the transmission efficiency of the whole transmission system is greatly improved, the hydraulic mechanical transmission system is a transmission system combining the respective advantages of hydraulic machinery, can adapt to the operation of tractors in various occasions, can realize various functions required by fine agriculture, and has incomparable advantages compared with other transmission systems. However, the common pump motor needs to be arranged in a split mode, the transmission system is complex in arrangement, and the shell-free integrated pump motor rotating unit is difficult to manufacture and inconvenient to maintain.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stepless speed change tractor stand alone type pump motor drive arrangement, simple structure is located the transmission but also independent an organic whole, makes things convenient for the maintenance and the maintenance of transmission.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is: the independent pump motor driving device of the stepless speed change tractor comprises a driving shell, an HMCVT pump motor, an HMCVT pump input assembly and an HMCVT motor output assembly, wherein the HMCVT pump input assembly and the HMCVT motor output assembly are respectively fixed in the driving shell, the HMCVT pump motor is arranged between the HMCVT pump input assembly and the HMCVT motor output assembly, and two ends of the HMCVT pump motor are respectively connected to the HMCVT pump input assembly and the HMCVT motor output assembly; the mechanical flow from the engine is input to the pump input end of the HMCVT pump motor through the HMCVT pump input assembly, and the hydraulic pressure converted into stepless speed regulation is transmitted to the HMCVT motor output assembly through the motor output end of the HMCVT pump motor.

The HMCVT motor output assembly includes an HMCVT motor output gear carrier coupled to the drive housing, an HMCVT motor output idler gear in meshing engagement with the HMCVT motor output gear and both mounted on the HMCVT motor output gear carrier, the HMCVT motor output gear being driven for rotation by the motor output of the HMCVT pump motor, and an HMCVT motor output idler gear for transmitting power to the differential planet row.

The HMCVT motor output gear support is further provided with an HMCVT motor output idler shaft, a first bearing, a second bearing and an HMCVT motor output gear shaft, the first bearing and the second bearing are fixed on the HMCVT motor output gear support, the HMCVT motor output idler shaft used for mounting the HMCVT motor output idler is sleeved on the first bearing, and the HMCVT motor output gear shaft used for mounting the HMCVT motor output gear is sleeved on the second bearing.

The two first bearings are respectively positioned at two shaft ends of an output idler shaft of the HMCVT motor, and the first retaining ring is used for axially positioning the first bearings; the two second bearings are respectively positioned at two shaft ends of an output gear shaft of the HMCVT motor, and the second bearings are axially positioned by the second retaining rings.

The HMCVT pump input assembly comprises an HMCVT pump input gear support, an HMCVT pump input gear and an HMCVT pump input idler, the HMCVT pump input gear support is fixed on the drive housing, the HMCVT pump input gear and the HMCVT pump input idler are meshed and are both mounted on the HMCVT pump input gear support, the HMCVT pump input gear and the pump input end of the HMCVT pump motor are in transmission connection, and the HMCVT pump input idler is used for connecting mechanical flow of an engine.

The HMCVT pump input gear support is also provided with a third bearing and a fourth bearing, the HMCVT pump input gear is sleeved on the third bearing, the HMCVT pump input idler is sleeved on the fourth bearing, axial positioning is carried out on the third bearing through the third retainer ring, and axial positioning is carried out on the fourth bearing through the fourth retainer ring.

The HMCVT motor output assembly is connected to the drive housing by an HMCVT motor output gear mount, and the HMCVT pump input assembly is connected to the drive housing by the HMCVT pump input gear mount; the output end of the HMCVT pump motor is supported in a spigot hole on the HMCVT motor output gear support, and the motor output shaft of the HMCVT pump motor is connected with an HMCVT motor output gear shaft in the HMCVT motor output assembly through a spline; the input end of the HMCVT pump motor is connected with the HMCVT pump input gear support through an HMCVT pump fixing bolt, and the pump input shaft of the HMCVT pump motor is connected with the HMCVT pump input gear in the HMCVT pump input assembly through a spline.

And a bolt damping sleeve is sleeved on the HMCVT pump fixing bolt.

The HMCVT motor output gear support is connected with the drive housing by a first bolt, and the HMCVT pump input gear support is connected with the drive housing by a second bolt.

The mechanical flow from the engine is transmitted to an input gear of the HMCVT pump through a gear on the input idler gear of the HMCVT pump, the mechanical flow is input to a pump input end of the HMCVT pump motor through a spline on the input gear of the HMCVT pump, the mechanical flow is converted into hydraulic pressure capable of being adjusted in a stepless mode, the hydraulic pressure flows through a motor output end of the HMCVT pump motor to be output and transmitted to an output gear shaft of the HMCVT motor connected with the spline of the HMCVT pump motor, the hydraulic pressure is transmitted to a gear on the output idler gear of the HMCVT motor meshed with the output gear shaft of the HMCVT motor, and then the.

The utility model discloses beneficial effect: the utility model discloses a stepless speed change tractor stand alone type pump motor drive device goes into gear, motor output gear setting with pump, motor, pump in an independent casing, is connected through bolt and drive train casing, lies in the drive train but also independent an organic whole, and the structural arrangement is simple, makes things convenient for the maintenance and the maintenance of drive train.

Drawings

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

the labels in the figure are: 1. HMCVT motor output gear carrier, 2, first bearing, 3, HMCVT motor output idler shaft, 4, HMCVT motor output idler, 5, first retaining ring, 6, HMCVT motor output gear, 7, second bearing, 8, HMCVT motor output gear shaft, 9, second retaining ring, 10, drive housing, 11, first bolt, 12, HMCVT pump motor, 13, HMCVT pump fixing bolt, 14, bolt damper sleeve, 15, HMCVT pump input gear carrier, 16, second bolt, 17, third retaining ring, 18, third bearing, 19, HMCVT pump input gear, 20, fourth retaining ring, 21, fourth bearing, 22, HMCVT pump input idler, 23, motor output shaft, 24, pump input shaft.

Detailed Description

The following detailed description of the present invention is provided with reference to the accompanying drawings and examples, but not to be construed as limiting the present invention in any way.

Referring to the drawings, the independent pump motor driving device of the continuously variable transmission tractor mainly comprises an HMCVT motor output gear support 1, a first bearing 2, an HMCVT motor output idler shaft 3, an HMCVT motor output idler 4, a first retainer ring 5, an HMCVT motor output gear 6, a second bearing 7, an HMCVT motor output gear shaft 8, a second retainer ring 9, an HMCVT pump motor driving shell 10, a first bolt 11, an HMCVT pump motor 12, an HMCVT pump fixing bolt 13, an HMCVT pump fixing bolt damping sleeve 14, an HMCVT pump input gear support 15, a second bolt 16, a third retainer ring 17, a third bearing 18, an HMCVT pump input gear 19, a fourth retainer ring 20, a fourth bearing 21 and an HMCVT pump input idler 22.

The HMCVT motor output gear support 1 is connected with an HMCVT pump motor drive housing 10 through a first bolt 11, an HMCVT motor output idler shaft 3 is sleeved on a first bearing 2, two first bearings 2 are mounted on the HMCVT motor output gear support 1, an HMCVT motor output idler 4 is sleeved on the HMCVT motor output idler shaft 3 through splines, and two first retaining rings 5 are mounted on the HMCVT motor output gear support 1 and are located close to the first bearings 2 in the axial direction. An HMCVT motor output gear shaft 8 is sleeved on a second bearing 7, two second bearings 7 are mounted on the HMCVT motor output gear carrier 1, an HMCVT motor output gear 6 is sleeved on the HMCVT motor output gear shaft 8 through splines, and two second collars 9 are mounted on the HMCVT motor output gear carrier 1 and axially position it next to the second bearings 7.

The HMCVT pump input gear carrier 15 is connected to the HMCVT pump motor drive housing 10 by a second bolt 16, the HMCVT pump input gear 19 is sleeved on the third bearing 18, the two third bearings 18 are mounted on the HMCVT pump input gear carrier 15, the third retainer ring 17 is mounted on the HMCVT pump input gear 19 to axially locate the third bearing 18, the HMCVT pump input idler 22 is sleeved on the fourth bearing 21, the two fourth bearings 21 are mounted on the HMCVT pump input gear carrier 15, and the fourth retainer ring 20 is mounted on the HMCVT pump input idler 22 to axially locate the fourth bearing 21.

The motor output end of the HMCVT pump motor 12 is supported in a spigot hole on the HMCVT motor output gear support 1 through a spigot of the motor output end, and a motor output shaft 23 arranged at the output end of the HMCVT pump motor 12 is connected with the HMCVT motor output gear shaft 8 through splines. Two HMCVT pump fixing bolts 13 are installed on an HMCVT pump input gear support 15 through threads, the HMCVT pump fixing bolts 13 are installed in positioning holes in the HMCVT pump motor 12 through adjusting threads, a bolt damping sleeve 14 is sleeved on the HMCVT pump fixing bolts 13 and is installed in the positioning holes in the HMCVT pump motor 12, and meanwhile a pump input shaft 24 arranged at the input end of the HMCVT pump motor 12 is connected with an HMCVT pump input gear 19 through splines.

Mechanical flow from the engine is transmitted to the HMCVT pump input gear 19 via the gears on the HMCVT pump input idler gear 22, mechanical flow is input to the pump input shaft 24 of the HMCVT pump motor 12 via splines on the HMCVT pump input gear 19, hydraulic pressure converted to infinitely variable speed in the HMCVT pump motor 12 is output via the motor output shaft 23 of the HMCVT pump motor 12 and transmitted to the HMCVT motor output gear shaft 8 splined thereto, to the gears on the HMCVT motor output idler gear 4 meshing with the HMCVT motor output gear shaft 8, and then to the differential planet row via the gears on the HMCVT motor output idler gear 4. The HMCVT pump motor 12, the HMCVT pump input gear support 15 and the HMCVT motor output gear support 1 are independent units of the transmission system, and the whole pump motor driving device is located in the transmission system and can be detached independently, so that the transmission system is convenient to overhaul and maintain.

It should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalent changes may be made in some technical features of the embodiments, such as the type and adjustment of the bearing, and the positioning of the parts. All changes, modifications, equivalents and the like which come within the spirit of the invention are intended to be embraced therein.

Claims

1. A stepless speed change tractor independent pump motor driving device comprises a driving shell (10), an HMCVT pump motor (12), an HMCVT pump input assembly and an HMCVT motor output assembly, and is characterized in that: the HMCVT pump input assembly and the HMCVT motor output assembly are respectively fixed in the drive shell (10), the HMCVT pump motor (12) is arranged between the HMCVT pump input assembly and the HMCVT motor output assembly, and two ends of the HMCVT pump motor (12) are respectively connected to the HMCVT pump input assembly and the HMCVT motor output assembly; mechanical flow from an engine is input to a pump input end of an HMCVT pump motor (12) through an HMCVT pump input assembly, and hydraulic pressure converted into stepless speed regulation flows through a motor output end of the HMCVT pump motor (12) and is transmitted to an HMCVT motor output assembly.

2. The infinitely variable tractor freestanding pump motor drive of claim 1, further comprising: the HMCVT motor output assembly comprises an HMCVT motor output gear support (1), an HMCVT motor output idler gear (4) and an HMCVT motor output gear (6), the HMCVT motor output gear support (1) is connected with the drive housing (10), the HMCVT motor output idler gear (4) and the HMCVT motor output gear (6) are meshed and are both mounted on the HMCVT motor output gear support (1), the HMCVT motor output gear (6) is driven to rotate by a motor output end of the HMCVT pump motor (12), and the HMCVT motor output idler gear (4) is used for transmitting power to a differential planet row.

3. The infinitely variable tractor freestanding pump motor drive of claim 2, wherein: still be equipped with HMCVT motor output idler shaft (3), first bearing (2), second bearing (7) and HMCVT motor output gear axle (8) on HMCVT motor output gear support (1), first bearing (2) and second bearing (7) are all fixed on HMCVT motor output gear support (1), and HMCVT motor output idler shaft (3) suit for installing HMCVT motor output idler (4) is on first bearing (2), is used for installing HMCVT motor output gear axle (8) suit of HMCVT motor output gear (6) is on second bearing (7).

4. A continuously variable tractor freestanding pump motor drive as claimed in claim 3, characterised in that: the two first bearings (2) are respectively positioned at two shaft ends of an output idler shaft (3) of the HMCVT motor, and the first bearing (2) is axially positioned by a first retainer ring (5); the two second bearings (7) are respectively positioned at two shaft ends of an output gear shaft (8) of the HMCVT motor, and the second bearings (7) are axially positioned by a second retainer ring (9).

5. The infinitely variable tractor freestanding pump motor drive of claim 1, further comprising: the HMCVT pump input assembly comprises an HMCVT pump input gear support (15), an HMCVT pump input gear (19) and an HMCVT pump input idler gear (22), the HMCVT pump input gear support (15) is fixed to the drive housing (10), the HMCVT pump input gear (19) and the HMCVT pump input idler gear (22) are meshed and are both mounted on the HMCVT pump input gear support (15), the HMCVT pump input gear (19) and a pump input end of the HMCVT pump motor (12) are in transmission connection, and the HMCVT pump input idler gear (22) is used for connecting mechanical flow of an engine.

6. The infinitely variable tractor freestanding pump motor drive of claim 5, wherein: the HMCVT pump input gear support (15) is further provided with a third bearing (18) and a fourth bearing (21), the HMCVT pump input gear (19) is sleeved on the third bearing (18), the HMCVT pump input idler wheel (22) is sleeved on the fourth bearing (21), the third bearing (18) is axially positioned through a third check ring (17), and the fourth bearing (21) is axially positioned through a fourth check ring (20).

7. The infinitely variable tractor freestanding pump motor drive of claim 5, wherein: the HMCVT motor output assembly is connected to the drive housing (10) by an HMCVT motor output gear carrier (1), and the HMCVT pump input assembly is connected to the drive housing (10) by the HMCVT pump input gear carrier (15); the output end of the HMCVT pump motor (12) is supported in a spigot hole on the HMCVT motor output gear support (1), and a motor output shaft (23) of the HMCVT pump motor (12) is connected with an HMCVT motor output gear shaft (8) in an HMCVT motor output assembly through splines; the input end of the HMCVT pump motor (12) is connected with the HMCVT pump input gear support (15) through an HMCVT pump fixing bolt (13), and a pump input shaft (24) of the HMCVT pump motor (12) is connected with an HMCVT pump input gear (19) in the HMCVT pump input assembly through splines.

8. The infinitely variable tractor freestanding pump motor drive of claim 7, wherein: and a bolt damping sleeve (14) is sleeved on the HMCVT pump fixing bolt (13).

9. The infinitely variable tractor freestanding pump motor drive of claim 7, wherein: the HMCVT motor output gear support (1) is connected with the driving shell (10) through a first bolt (11), and the HMCVT pump input gear support (15) is connected with the driving shell (10) through a second bolt (16).