CN211624128U

CN211624128U - Walking gearbox of wheeled excavator

Info

Publication number: CN211624128U
Application number: CN202020085302.4U
Authority: CN
Inventors: 郭向阳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2020-10-02
Anticipated expiration: 2030-01-15

Abstract

The utility model discloses a walking gearbox of wheeled excavator relates to excavator technical field, including the box, be equipped with torque converter, input shaft, output gear pair, one keep off planetary gear derailleur and reverse gear planetary gear derailleur in the box, torque converter connects in the input shaft, and the input shaft is connected in output gear pair through keeping off the clutch. A first-gear sun gear of the first-gear planetary gear transmission is connected with the input shaft, a first-gear planet carrier is connected with the output gear pair, and a first-gear ring is connected with the box body through a first-gear clutch. The reverse gear sun gear of the reverse gear planetary gear transmission is connected to the input shaft, the reverse gear planet carrier is connected to the box body through the reverse gear clutch, and the reverse gear ring gear is connected to the output gear pair. The utility model discloses a hydraulic drive mode controls the fender position with different clutches, and the convenience of shifting just need not park and put into gear to still have advantages such as climbing performance is good, power transmission efficiency height.

Description

Walking gearbox of wheeled excavator

Technical Field

The utility model relates to an excavator technical field, the more specifically walking gearbox that indicates a wheeled excavator that says so.

Background

Wheel excavator is divided into two at domestic walking mode, one, come the transmission moment of torsion and switch different number ratio and change walking speed and moment of torsion with mechanical gear shifting gearbox, this kind is though efficient to step on frequently that the separation and reunion shifts gear operation is tired when removing, the engine is easy to put out fire when climbing and bulldozing the operation, two, drive high low-speed mechanical gear box with hydraulic motor, the defect of this kind of existence is, hydraulic motor is inefficient, including gearbox efficiency and transaxle efficiency, the total efficiency is less than 75%, and high low-speed gear box also is mechanical gear shifting, even can put into gear to park. Therefore, a novel walking gearbox with high transmission effect and convenient operation is urgently needed to be developed for the wheel type excavator.

Disclosure of Invention

The utility model provides a pair of walking gearbox of wheeled excavator, its aim at solve the above-mentioned problem that exists among the prior art.

The utility model adopts the technical scheme as follows:

a walking gearbox of a wheel excavator comprises a box body, wherein an input shaft, an output gear pair, a first-gear planetary gear transmission, a first-gear clutch and a second-gear clutch are arranged in the box body; the first-gear sun gear of the first-gear planetary gear transmission is fixedly connected to the input shaft, the first-gear planet carrier is fixedly connected to the output gear pair, and the first-gear ring is connected to the box body through the first-gear clutch.

Further, still including reverse gear planetary gear derailleur and reverse gear clutch, above-mentioned reverse gear planetary gear derailleur's reverse gear sun gear fixed connection is in the input shaft, and the planet carrier that reverses gear is connected in the box through reverse gear clutch, and reverse gear ring gear fixed connection is in output gear pair.

Further, the reverse clutch, the first gear clutch and the second gear clutch are all hydraulic friction clutches.

Further, the reverse gear ring gear, the first gear planet carrier, the second gear clutch housing of the second gear clutch and the output gear pair are fixedly connected in sequence.

And the hydraulic pump and the variable gear pump are connected with a pump impeller of the hydraulic torque converter, and a turbine of the hydraulic torque converter is fixedly connected with the input shaft.

From the above description of the present invention, compared with the prior art, the advantages of the present invention lie in:

the utility model discloses owing to adopt hydraulic drive mode, control the fender position with different clutches, so shift light swift, need not park and put into gear. Because of the torque increasing function of the torque converter, the actual variable ratio can reach more than 9, so the traction force is large, and the climbing performance of the whole vehicle is good.

In addition, because the hydraulic torque converter adopts a free guide wheel structure, the guide wheel can rotate freely in a single direction and lock in the opposite direction, when the torque ratio is less than 1, the guide wheel rotates in the opposite direction and the pump wheel rotates in the same direction, so that the efficiency of the hydraulic torque converter is obviously improved, and when the whole vehicle moves at high speed, the efficiency can reach more than 90%.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent to one skilled in the art that the present invention may be practiced without these details.

Referring to fig. 1, a traveling transmission of a wheel excavator includes a case 1, and a torque converter 2, an input shaft 3, an output gear pair 9, a reverse planetary gear transmission 6, a reverse clutch 4, a first-gear planetary gear transmission 7, a first-gear clutch 5, and a second-gear clutch 8 are installed in the case 1. The input shaft 3 and the output gear pair 9 are rotatably mounted in the case 1, and the right end of the input shaft 3 is separably connected to the output gear pair 9 through the two-gear clutch 8. More specifically, the second clutch 8 is a hydraulic friction clutch, and the output gear set 9 is fixedly connected to a second clutch housing 81 of the second clutch 8. In particular, the output gear set 9 is a helical bevel gear.

Referring to fig. 1, the torque converter 2 mainly includes a pump impeller 21, a stator 22, and a turbine runner 23. The impeller 21 is connected to a flywheel (not shown) of the engine via a coupling (not shown). The guide wheel 22 is provided on the casing 1 so as to be freely rotatable in one direction through a one-way bearing, and the guide wheel 22 is allowed to rotate in the same direction as the pump wheel 21 and locked in the opposite direction. The turbine 23 is fixedly connected to the left end of the input shaft 3. The hydraulic pump system further comprises a driving gear 11, a driven gear 12, a variable-speed gear pump 100 and a hydraulic pump 200, wherein the pump wheel 21 and the driving gear 11 are locked with each other, the driving gear 11 and the driven gear 12 are meshed with each other, and the variable-speed gear pump 100 and the hydraulic pump 200 are locked with each other and the driven gear 12, so that the variable-speed gear pump 100 and the hydraulic pump 200 are connected to the hydraulic torque converter 2.

Referring to fig. 1, the first-speed planetary gear transmission 7 mainly includes a first-speed sun gear 71, a first-speed carrier 72, a first-speed planetary gear 73, and a first-speed ring gear 74. The first-gear sun gear 71 is fixedly connected to the input shaft 3 through a spline in a sleeving manner, the first-gear planet carrier 72 is fixedly connected to the output gear pair 9, and the first-gear ring gear 74 is detachably connected to the case 1 through the first-gear clutch 5. Specifically, the first-gear carrier 72 is fixedly connected to the second-gear clutch housing 81 of the second-gear clutch 8. The first gear clutch 5 is a hydraulic friction clutch.

Referring to fig. 1, the reverse planetary transmission 6 basically includes a reverse sun gear 61, a reverse planet gear 62, a reverse planet carrier 63 and a reverse ring gear 64. The reverse sun gear 61 is fixedly connected to the input shaft 3 through a spline in a sleeved manner, the reverse planet carrier 63 is detachably connected to the case 1 through the reverse clutch 4, and the reverse gear ring gear 64 is fixedly connected to the output gear pair. Specifically, the reverse ring gear 64 is fixedly connected to the first gear carrier 72. The reverse clutch 4 is a hydraulic friction clutch.

Referring to fig. 1, the utility model discloses an operating method:

the pump impeller 21 of the torque converter 2 is connected to a flywheel of the engine through a coupling, and the output gear pair 9 is connected to front and rear axles of the under frame through a transmission shaft or the like.

When only the second gear piston rod 82 of the second gear clutch 8 has pressure (i.e. the second gear clutch 8 is in a connected state), the static friction plate and the dynamic friction plate of the second gear clutch 8 are tightly pressed together under the pushing of the piston rod 82, and the input shaft 3 drives the second gear clutch housing 81, so that the output gear pair 9 fixedly connected to the second gear clutch housing 81 rotates at the same speed with the input shaft 3.

When only the first gear piston rod of the first gear clutch 5 has pressure (i.e. the first gear clutch 5 is in the engaged state), the static friction plate and the dynamic friction plate of the first gear clutch 5 are pushed by the piston rod to be tightly pressed together, so that the first gear ring gear 74 and the box body 1 are fixedly connected together and cannot rotate, the input shaft 3 drives the first gear sun gear 71, and the first gear sun gear 71 drives the first gear planet gear 73. Since the first-gear ring gear 74 does not rotate, the rotation of the first-gear planet wheels 73 will drive the first-gear planet carrier 72 to rotate. Since the first-gear carrier 72, the second-gear clutch housing 81, and the output gear set 9 are fixedly connected together, the first-gear carrier 72 drives the output gear set 9.

When only the reverse piston rod of the reverse clutch 4 has pressure (i.e. the reverse clutch 4 is in a connected state), the static friction plate and the dynamic friction plate of the reverse clutch 4 are tightly pressed together under the pushing of the piston rod, so that the reverse planet carrier 63 and the box body 1 are fixedly connected together and cannot rotate, the input shaft 3 drives the reverse sun gear 61, and the reverse sun gear 61 drives the reverse planet gear 62. Since the reverse planet carrier 63 is not rotating, rotation of the reverse planet gear 62 will drive the reverse ring gear 64. Since the reverse gear ring gear 64, the first-gear carrier 72, the second-gear clutch housing 81, and the output gear set 9 are fixedly connected together, the reverse gear ring gear 64 drives the output gear set 9.

To sum up, the utility model discloses owing to adopt hydraulic drive mode, control the fender position with different clutches, so shift light swift, need not park and put into gear. Because of the torque increasing function of the torque converter, the actual variable ratio can reach more than 9, so the traction force is large, and the climbing performance of the whole vehicle is good. In addition, because the hydraulic torque converter adopts a free guide wheel structure, the guide wheel can rotate freely in a single direction and lock in the opposite direction, when the torque ratio is less than 1, the guide wheel rotates in the opposite direction and the pump wheel rotates in the same direction, so that the efficiency of the hydraulic torque converter is obviously improved, and when the whole vehicle moves at high speed, the efficiency can reach more than 90%.

Claims

1. The utility model provides a walking gearbox of wheeled excavator which characterized in that: the transmission device comprises a box body, wherein an input shaft, an output gear pair, a first-gear planetary gear transmission, a first-gear clutch and a second-gear clutch are arranged in the box body; a first-gear sun gear of the first-gear planetary gear transmission is fixedly connected to the input shaft, a first-gear planet carrier is fixedly connected to the output gear pair, and a first-gear ring is connected to the box body through a first-gear clutch.

2. The walking gearbox of wheeled excavator according to claim 1, characterized by: the reverse gear planetary gear transmission is fixedly connected to the input shaft, the reverse gear planet carrier is connected to the box body through the reverse gear clutch, and the reverse gear ring is fixedly connected to the output gear pair.

3. The walking gearbox of wheeled excavator according to claim 2, wherein: the reverse gear clutch, the first gear clutch and the second gear clutch are all hydraulic friction clutches.

4. The walking gearbox of wheeled excavator according to claim 3, characterized by: and the reverse gear inner gear ring of the reverse gear clutch, the first gear planet carrier of the first gear clutch, the second gear clutch shell of the second gear clutch and the output gear pair are fixedly connected in sequence.

5. A travel gearbox for a wheeled excavator according to any one of claims 1 to 3 wherein: the hydraulic pump and the variable-speed gear pump are both connected to a pump impeller of the hydraulic torque converter, and a turbine of the hydraulic torque converter is fixedly connected to the input shaft.