CN220727008U

CN220727008U - Transfer case gear box, power assembly and agricultural machine

Info

Publication number: CN220727008U
Application number: CN202322580573.3U
Authority: CN
Inventors: 王彬彬; 杨晓峰; 陈斌; 陈晨
Original assignee: Zhonglian Agricultural Machinery Co ltd
Current assignee: Zhonglian Agricultural Machinery Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-04-05
Anticipated expiration: 2033-09-21

Abstract

The utility model relates to the field of vehicles and discloses a transfer case gearbox, a power assembly and an agricultural machine, wherein the transfer case gearbox comprises a box body (1), a driving gear (2) and a plurality of driven gears (4) which are meshed with the driving gear (2) and uniformly distributed around the driving gear (2), the driving gear (2) and the driven gears (4) are respectively helical gears, the driving gear (2) and a driving shaft (3) which is used for being connected to a power source on the first side of the box body (1) are respectively rotatably arranged in the box body (1), and the box body (1) is provided with a first side and a second side which are opposite to each other. The transfer case gear box can ensure good meshing relationship and transmission stability, and the driving gear and the driving shaft are integrally formed, so that the structural strength is enhanced, the assembly of parts is reduced, the bearing clearance is convenient to ensure well, and the service life of the transfer case gear box is prolonged.

Description

Transfer case gear box, power assembly and agricultural machine

Technical Field

The utility model relates to the field of vehicles, in particular to a transfer case gearbox. On the basis, the utility model also relates to a power assembly and an agricultural machine comprising the transfer case gearbox.

Background

As the sugar industry develops, the market demand for sugar cane as a main raw material for the sugar industry is increasing. In the sucrose production, sugarcane harvesting mechanization is a key weak link for improving production efficiency and reducing production cost, and at present, the technical development of a sugarcane harvester is still in a primary stage, and the performance stability and reliability of the sugarcane harvester have important influence on improving market competitiveness due to the characteristics of obvious operation period, severe operation environment, large work load and the like.

Typically, an agricultural machine or other vehicle such as a sugar cane harvester may be provided with power take-off and transmission means such as an engine, a transfer gearbox and a power pump, with the power output by the engine being distributed to different output shafts in the transfer gearbox, which in turn drives a plurality of power pumps to output power to different work machines. At present, the transfer case gear box mainly comprises box body, shaft, gear, bearing, oil seal, key, spacer bush and other parts, and the part type is many, and the assembly is loaded down with trivial details, and the assembly clearance is difficult for adjusting. The service life of the gearbox of the differential is more demanding in the environment of high-intensity operation.

Many faults of the transfer case are due to assembly control of structural strength of the gear itself, more parts, larger dimensional chain errors and bearing play. In addition, the gear shaft spline and the hydraulic pump spline have poor coaxiality, so that the spline is seriously worn, and even the hydraulic pump oil seal is worn, the oil leakage problem often occurs. Therefore, how to increase the life of the transfer case gearbox is a critical issue for the development of sugarcane harvesting machinery.

Disclosure of Invention

The utility model aims to solve the problems that a transfer case gear box is inconvenient to assemble and is difficult to guarantee a dimension chain error in the prior art, and provides a transfer case gear box which is small in number of parts, convenient to adjust bearing gaps in the assembling process and good in transmission stability.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a transfer gear box including a box body, a driving gear rotatably mounted in the box body, and a plurality of driven gears meshed with the driving gear and uniformly distributed around the driving gear, wherein the box body has a first side and a second side opposite to each other, the driving gear and the driven gears are helical gears, respectively, and the driving gear is integrally formed with a driving shaft for driving connection to a power source at the first side of the box body.

Preferably, the driving gear is rotatably mounted in the case by first bearings supported on the driving shaft at both ends of the driving gear.

Preferably, a cover plate is detachably connected to the first side of the case, the driving shaft extends from the case through the cover plate, and an external spline for driving connection with the power source is formed at the extending end, the first bearing at one end of the driving gear facing the cover plate is mounted on the cover plate, and when the cover plate is detached from the case, the driving gear is allowed to be taken out from the first side of the case.

Preferably, the transfer power output unit further comprises a driven shaft for driving and connecting the transfer power output unit, wherein the driven shaft is formed with an internal spline and is integrally formed with the driven gear.

Preferably, the driven gear is rotatably mounted in the case through a second bearing supported on the driven shaft at both ends of the driven gear, a flange is detachably connected to a second side of the case, the second bearing at one end of the driven gear facing the flange is mounted on the flange, the second bearing at the other end is mounted on the case, and when the flange is detached from the case, the driven gear is allowed to be taken out from the second side of the case.

Preferably, the transfer gear box comprises four driven gears uniformly distributed around the circumference of the driving gear, and the centers of any two adjacent driven gears are positioned in the same horizontal plane or the same vertical plane.

Preferably, the driving gear and/or the driven gear has a screw hole formed therein.

Preferably, a plurality of ribs are formed on the outer wall surface of the box body.

A second aspect of the utility model provides a powertrain comprising an engine and a transfer case gearbox as described above, the drive shaft of the transfer case gearbox being drivingly connected to the power output of the engine, the driven gears being drivingly connected to respective power pumps.

A third aspect of the utility model provides an agricultural machine comprising a transfer gearbox or powertrain as described above.

Through the technical scheme, the transfer case gearbox adopts helical gear transmission, so that good meshing relationship and transmission stability can be ensured, the driving gear and the driving shaft are integrally formed, the structural strength is enhanced, the assembly of parts is reduced, the bearing clearance is conveniently and well ensured, and the service life of the transfer case gearbox is prolonged.

Drawings

FIG. 1 is a perspective view of a powertrain according to a preferred embodiment of the present utility model;

FIG. 2 is a perspective view of a transfer case gearbox according to a preferred embodiment of the present utility model;

FIG. 3 is a perspective view of the transfer case gearbox of FIG. 2 from another perspective;

FIG. 4 is a front view of the transfer case gearbox of FIG. 2;

FIG. 5 is a cross-sectional view of the transfer case gearbox of FIG. 2;

FIG. 6 is a front elevational view of the arrangement of the drive and driven gears of the transfer case gearbox of FIG. 2;

fig. 7 is a side view of the arrangement of the driving gear and the driven gear of fig. 5.

Description of the reference numerals

100-transfer case gearbox; 1-a box body; 2-a drive gear; 3-a driving shaft; 3 a-external splines; 4-driven gears; 4 a-a threaded hole; 5-a driven shaft; 5 a-internal splines; 6-a first bearing; 7-cover plate; 8-a second bearing; 9-a flange plate; 10-convex ribs; 11-a viewing mirror; 12-hanging rings; 200-an engine; 300-power pump.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

Referring to fig. 1, the present utility model provides a power assembly, which may be used in agricultural machinery such as a sugarcane harvester, including an engine 200 and a transfer case gearbox 100, wherein a plurality of power pumps 300 are installed at a side of the transfer case gearbox 100 facing away from the engine 200, and power output from the engine 200 may be distributed to the respective power pumps 300 through the transfer case gearbox 100 to perform different actions. For example, for a sugar cane harvester, this can facilitate the formation of an all-hydraulic drive pattern, thereby better accommodating harsh operating environments. It should be noted that, although the power assembly and the transfer case of the present utility model will be described in detail herein and below mainly taking a transfer power output manner in the form of hydraulic pressure as an example, the transfer case gearbox 100 may output transfer power in other manners, such as by mechanically driving its driven shaft to a corresponding operating mechanism, without being limited to the form of hydraulic driving based on the power pump 300. In addition, the power source is not limited to the engine 200, and may be replaced with other forms of power sources such as a motor.

Referring to fig. 2 to 7, a transfer case gearbox for a power assembly according to a preferred embodiment of the present utility model includes a case 1, a driving gear 2 rotatably installed in the case 1, and a plurality of driven gears 4 engaged with the driving gear 2 and uniformly distributed around the driving gear 2. The housing 1 has a first side and a second side opposite to each other, the driving gear 2 and the driven gear 4 are respectively helical gears, the driving gear 2 is integrally formed with a driving shaft 3, the driving shaft 3 is for driving connection to a power source (e.g. an engine 200) at the first side of the housing 1, for example a flywheel of the engine 200 may be coupled to the driving shaft 3 by means of a coupling. Typically, a plurality of power pumps 300 respectively drivingly connected to the driven shafts 5 may be mounted on a second side of the casing 1 opposite to the first side, so as to output the transfer power in a hydraulic manner.

The transfer case gear box adopts helical gear transmission, so that good meshing relationship and transmission stability can be ensured, the driving gear 2 and the driving shaft 3 are integrally formed, the structural strength is enhanced, the assembly of parts is reduced, and bearing gaps are conveniently and well ensured, thereby prolonging the service life of the transfer case gear box. Similarly, the driven shaft 5 may be integrally formed with the driven gear 4.

Through designing gear and axle into integral type, can effectively improve the intensity of gear and axle, avoid key wearing and tearing, broken axle, gear to rock, transmission abnormal sound scheduling problem, the integral type design can reduce the part assembly. In addition, the gear and the shaft are designed into a whole, so that the dimension chain error can be reduced, the bearing clearance can be better ensured, the spline assembly precision is improved, the problem that the driven gear spline is not coaxial with the power pump spline is solved, and the problems of abrasion of the power pump spline and abrasion and oil leakage of the power pump spline oil seal are reduced. In order to make the transmission smoother and more reliable, the driving gear and the driven gear adopt helical gears. In order to improve the strength of the box body, the box body can be integrally cast by adopting QT500-3 material; the driving shaft and the driven shaft can be made of 20CrMnTi and are carburized and quenched. As shown in the figure, the parts inside the box body are simple in structure, reliable and stable in transmission, convenient and fast to assemble, and the assembly clearance of the bearing by adopting the angular contact ball bearing is well adjusted.

In order to facilitate the disassembly and the rotatable assembly of the components, a bearing housing may be formed in the case 1 and a bearing housing for mounting the bearing may be detachably connected thereto. Specifically, the driving gear 2 may be rotatably mounted in the case 1 by first bearings 6 supported on the driving shaft 3 at both ends of the driving gear 2. Wherein a cover plate 7 is detachably connected to a first side of the housing 1, through which cover plate 7 the driving shaft 3 protrudes from the housing 1 and at the protruding end an external spline 3a for a driving connection, such as an engine, is formed. A first bearing 6 at the end of the driving gear 2 facing the cover plate 7 is mounted on the cover plate 7 and allows the driving gear 2 to be removed from the first side of the housing 1 when the cover plate 7 is detached from the housing 1.

The driven shaft 5 may be formed with an internal spline 5a for connecting the power pump. The driven gear 4 is rotatably mounted in the case 1 via a second bearing 8 supported by the driven shaft 5 at both ends of the driven gear 4. A flange 9 is detachably connected to the second side of the housing 1, a second bearing 8 at one end of the driven gear 4 facing the flange 9 is mounted on the flange 9, and a second bearing 8 at the other end is mounted on the housing 1, and allows the driven gear 4 to be removed from the second side of the housing 1 when the flange 9 is detached from the housing 1.

The cover plate 7 and the driving shaft 3 can be sealed by using oil seals, the flange 9, the cover plate 7 and the like can be sealed by using O-shaped rings, and the sealing structure is simple and reliable and has good overall performance when being coated with sealing glue during installation.

The transfer case gearbox may be provided with at least two sets of driven gears and driven shafts, such as two sets, three sets, four sets, etc., as required for power distribution. Since the driven gears 4 of each group are uniformly distributed around the circumference of the driving gear 2, under normal operation conditions, the power transmitted by the driving gear 2 is uniformly distributed to each driven gear 4, the loads borne by each part of the driving gear 2 in the circumferential direction and each driven gear 4 are substantially equivalent, and the radial impacts borne by the power pump 300 connected to each driven shaft 5 cancel each other. However, when a gear transmission failure occurs in a particular situation such as tooth face wear or gear breakage, a corresponding impact is generated on the gear (particularly the drive gear 2). The transfer case gearbox of the present utility model preferably has four driven gears 4, which can have relatively little impact in the event of failure of one of the meshed gear sets, as compared to the other number of driven gears, without significantly increasing the difficulty of the gear arrangement.

Further, in the case where four driven gears 4 are arranged, the centers of any adjacent two driven gears 4 may be located in the same horizontal plane or the same vertical plane, that is, the line connecting the centers of any adjacent two driven gears 4 extends in the horizontal direction or the vertical direction. With this arrangement, the differential gear box can be made to have a relatively small height dimension, facilitating stable mounting on the vehicle body.

The bevel gear has the problem of inconvenient disassembly, and to this end, screw holes 4a can be respectively formed on the driving gear 2 and the driven gear 4, so that later disassembly is convenient.

Two slings 12 diagonally arranged may be provided on the transfer case body 1 in order to smoothly hoist the transfer case and carry out the installation process. The bottom end of the tank 1 may be provided with an oil drain port to drain the lubricant in the tank 1 by removing an oil drain plug connected to the oil drain port at the time of replacement or maintenance. In addition, can be equipped with observation mirror 11 on the lateral wall of box 1, in time the filling gear oil according to the liquid level of observing through this observation mirror 11, avoid gear oil to reduce, lead to the gear box temperature rise higher.

Compared with a straight gear, the driving gear and the driven gear which adopt the bevel gear forms have relatively higher heat dissipation requirements, so that a plurality of convex ribs 10 can be formed on the outer wall surface of the box body 1, the heat dissipation area is increased, and the strength of the box body is also improved. When the engine works, the fan at the front end of the engine can absorb heat to the engine room and simultaneously can radiate heat to the transfer case gearbox and the like.

The utility model also provides an agricultural machine, such as a sugarcane harvester, comprising the transfer case or the power assembly.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a number of simple variants of the technical solution of the utility model are possible, including combinations of individual specific technical features in any suitable way. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.

Claims

1. The transfer case gearbox is characterized by comprising a case body (1), a driving gear (2) and a plurality of driven gears (4) which are meshed with the driving gear (2) and uniformly distributed around the driving gear (2), wherein the driving gear (2) and the driven gears (4) are rotatably arranged in the case body (1), the case body (1) is provided with a first side and a second side which are opposite to each other, the driving gear (2) and the driven gears (4) are respectively helical gears, and the driving gear (2) and a driving shaft (3) which is used for being in transmission connection with the first side of the case body (1) are integrally formed.

2. Transfer gearbox according to claim 1, characterized in that the drive gear (2) is rotatably mounted in the box (1) by means of first bearings (6) supported on the drive shaft (3) at both ends of the drive gear (2).

3. Transfer gearbox according to claim 2, characterized in that the first side of the box (1) is detachably connected with a cover plate (7), that the driving shaft (3) protrudes from the box (1) through the cover plate (7) and is formed with external splines (3 a) at the protruding end for driving connection to the power source, that the first bearing (6) at the end of the driving gear (2) facing the cover plate (7) is mounted on the cover plate (7), and that the driving gear (2) is allowed to be removed from the first side of the box (1) when the cover plate (7) is detached from the box (1).

4. Transfer gearbox according to claim 1, further comprising a driven shaft (5) for driving a transfer power take-off unit, which driven shaft (5) is formed with internal splines (5 a) and is integrally formed with the driven gear (4).

5. The transfer case gearbox according to claim 4, characterized in that the driven gear (4) is rotatably mounted in the case (1) by means of a second bearing (8) supported on the driven shaft (5) at both ends of the driven gear (4), that a flange (9) is detachably connected to the second side of the case (1), that the second bearing (8) located at one end of the driven gear (4) facing the flange (9) is mounted on the flange (9), that the second bearing (8) at the other end is mounted to the case (1), and that the driven gear (4) is allowed to be removed from the second side of the case (1) when the flange (9) is detached from the case (1).

6. Transfer gearbox according to claim 1, characterized in that it comprises four driven gears (4) evenly distributed around the circumference of the driving gear (2), and in that the centers of any adjacent two driven gears (4) are located in the same horizontal plane or in the same vertical plane.

7. Transfer gearbox according to claim 1, characterized in that the driving gear (2) and/or the driven gear (4) are formed with threaded holes (4 a).

8. Transfer case gearbox according to claim 1, characterized in that the outer wall of the case (1) is formed with a plurality of ribs (10).

9. A powertrain comprising an engine (200) and a transfer gearbox (100) according to any one of claims 1 to 8, the drive shaft (3) of the transfer gearbox (100) being drivingly connected to the power take-off of the engine (200), the driven gears (4) being drivingly connected with a power pump (300), respectively.

10. An agricultural machine, characterized in that it comprises a transfer gearbox (100) according to any one of claims 1-8 or a powertrain according to claim 9.