CN215928294U

CN215928294U - Power assembly and engineering machinery

Info

Publication number: CN215928294U
Application number: CN202120966352.8U
Authority: CN
Inventors: 唐让祥; 章勇华; 鄢万斌; 邹玉会
Original assignee: Liugong Liuzhou Driving Member Co ltd; Guangxi Liugong Machinery Co Ltd
Current assignee: Liugong Liuzhou Driving Member Co ltd; Guangxi Liugong Machinery Co Ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2022-03-01
Anticipated expiration: 2031-05-08

Abstract

The utility model relates to a power device, in order to solve the problem that the oil leakage of a hydraulic torque converter in the existing power assembly may cause the oil shortage of a gearbox, the utility model constructs a power assembly and engineering machinery, wherein the power assembly comprises an engine, the hydraulic torque converter and the gearbox which are connected together, and an oil return pipeline which is communicated in a one-way manner from the engine to the gearbox is arranged between the engine and the gearbox; the first end of the oil return pipeline is connected to the bottom of a connecting cavity between the engine and the hydraulic torque converter and communicated with the inside of the connecting cavity, the second end of the oil return pipeline is connected to the gearbox and communicated with the inside of the gearbox, and the position height of the first end is higher than that of the second end. In the utility model, the oil leaked from the hydraulic torque converter to the connecting cavity between the engine and the hydraulic torque converter flows back to the gearbox through the oil return pipeline, thereby avoiding the adverse effect caused by the reduction of the oil amount in the gearbox and preventing the performance of the engine from being influenced by the accumulation of more oil in the connecting cavity.

Description

Power assembly and engineering machinery

Technical Field

The utility model relates to a power device, in particular to a power assembly and engineering machinery.

Background

A power assembly of the engineering machinery such as a loader comprises an engine, a hydraulic torque converter and a gearbox, as shown in figure 1, one end of the hydraulic torque converter is connected with the engine, and the other end of the hydraulic torque converter is connected with a gearbox shell. In a power assembly, oil in a hydraulic torque converter is extracted from a transmission case for supplement through a transmission pump, and the hydraulic torque converter adopts a dry design, and oil leakage can occur in the use process and enters a connecting cavity of the hydraulic torque converter and an engine. The unable discharge of fluid in the connection intracavity can be more, and the lubricating oil that makes in the gearbox reduces, influences gearbox and engine performance, and the fluid of connecting the intracavity also has probably to cause adverse effect to the work of engine simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power assembly and engineering machinery to solve the technical problem that the oil leakage of a hydraulic torque converter in the existing power assembly can cause the oil shortage of a gearbox, and the problem that the oil leakage of the hydraulic torque converter causes the oil shortage of the gearbox is solved.

The technical scheme for realizing the purpose of the utility model is as follows: a power assembly is constructed, which comprises an engine, a hydraulic torque converter and a gearbox which are connected together, and is characterized in that an oil return pipeline which is communicated in a one-way from the engine to the gearbox is arranged between the engine and the gearbox; the first end of the oil return pipeline is connected to the bottom of a connecting cavity between the engine and the hydraulic torque converter and communicated with the inside of the connecting cavity, the second end of the oil return pipeline is connected to the gearbox and communicated with the inside of the gearbox, and the position height of the first end is higher than that of the second end. In the utility model, the oil leaked from the hydraulic torque converter to the connecting cavity between the engine and the hydraulic torque converter flows back to the gearbox through the oil return pipeline, thereby avoiding the adverse effect caused by the reduction of the oil amount in the gearbox and preventing the performance of the engine from being influenced by the accumulation of more oil in the connecting cavity.

In the power assembly, the oil return pipeline is arranged outside the shell of the engine, the hydraulic torque converter and the gearbox. The pipeline is arranged outside, so that the structure is simplified, and the maintenance and the repair are convenient.

In the power assembly, the oil return pipeline comprises an oil return pipe and a one-way valve arranged in a joint at the end part of the oil return pipe. Furthermore, the check valve is composed of a round steel ball and a limiting seat with a conical surface in sealing fit with the round steel ball, and the limiting seat is installed in the joint of the oil return pipe. The limiting seat is in a cone shape. When the machine is parked on the horizontal plane, the round steel ball is located at the large-caliber end of the limiting seat under the action of self gravity, the one-way valve is in a conducting state, when the machine is in a climbing state and exceeds a preset angle, the limiting seat is inclined, the round steel ball rolls to the small-caliber end of the limiting seat under the action of self gravity and is matched and sealed with the conical surface, and oil is prevented from flowing into the connecting cavity through the oil return pipeline by the gearbox.

In the power assembly, an included angle between the bottom side of the longitudinal section of the conical section and the horizontal plane is greater than 20 degrees. The bottom edge of the longitudinal section of the conical surface is a line formed by the contact point of the conical surface of the limiting seat and the round steel ball before the round steel ball is in sealing fit with the conical surface, when the machine is inclined backwards to a certain angle, the limiting seat is also inclined along with the machine, and the round steel ball rolls on the bottom edge of the longitudinal section of the conical surface. The included angle between the bottom edge of the longitudinal section of the conical surface and the horizontal plane is more than 20 degrees, so that when the climbing angle of the machine is more than 20 degrees, the round steel ball of the one-way valve rolls to the small-caliber end along the bottom edge of the longitudinal section of the conical surface under the action of self gravity to be matched with the conical surface for sealing, and oil in the gearbox is prevented from entering the connecting cavity through an oil return pipeline.

In the power assembly, the check valve is located at the second end of the oil return pipeline. In the power assembly, the large-caliber end of the limiting seat is provided with a limiting mechanism for preventing the round steel ball from falling off. The limiting mechanism is formed by bending the cylinder edge of the large-caliber end inwards. The limiting mechanism can also be a check ring arranged in the limiting seat.

The technical scheme for realizing the purpose of the utility model is as follows: a construction machine is constructed, which is characterized by having the power assembly. The work machine may be a loader, a grader, or the like.

Compared with the prior art, in the utility model, the oil leaked from the hydraulic torque converter to the connecting cavity between the engine and the hydraulic torque converter flows back to the gearbox through the oil return pipeline, thereby avoiding the adverse effect caused by the reduction of the oil amount in the gearbox and preventing the performance of the engine from being influenced by the more accumulated oil in the connecting cavity.

Drawings

FIG. 1 is a schematic diagram of the powertrain of the present invention.

Fig. 2 is a schematic structural view of an oil return line according to the present invention.

Fig. 3 is a schematic view of the structure of the check valve of the present invention.

Part names and serial numbers in the figure:

the hydraulic torque converter comprises a gearbox 1, a hydraulic torque converter 2, an engine 3, a front end fitting surface 31, a connecting cavity 32, an oil return pipeline 4, a one-way valve 41, a round steel ball 411, a limiting seat 412, a cylinder edge inward bend 413, a bottom edge 414, a second joint 42, an oil return pipe 43 and a first joint 44.

Detailed Description

The following description of the embodiments refers to the accompanying drawings.

As shown in fig. 1, the powertrain in this embodiment includes an engine 3, a torque converter 2 and a transmission 1, which are connected together, specifically, the torque converter 2 is installed on the front side of the engine 3, the transmission 1 is installed on the front side of the torque converter 2, the engine 3 drives the torque converter 2 to operate, and the torque converter 2 drives the transmission 1 to rotate. The front end fitting surface 31 of the engine shell is connected and matched with the rear end fitting surface of the shell of the hydraulic torque converter 2, and a closed connecting cavity 32 is formed in the front of the engine shell. The power assembly is arranged on engineering machinery such as a loader, a land leveler and the like.

An oil return pipeline 4 which is communicated from the engine 3 to the direction of the gearbox 1 in a one-way mode is arranged between the engine 3 and the gearbox 1. The first end of the oil return pipeline 4 is connected to the bottom of the connecting cavity 32 and communicated with the inside of the connecting cavity 32, the second end of the oil return pipeline is connected to the transmission case 1 and communicated with the inside of the transmission case, and the first end is higher than the second end.

As shown in fig. 2, the oil return line 4 is composed of an oil return pipe 43, a first joint 42 connected to a first end of the oil return pipe 43, a second joint 44 connected to a second end of the oil return pipe 43, and a check valve 41 disposed in the second joint 42, wherein the first joint 44 is an elbow joint, is connected to the engine 3, and is communicated with the inside of the connection chamber at the bottom of the connection chamber 32. The second joint 42 is connected to the transmission 1 and communicates with the transmission inner chamber, and the return line 4 communicates the connection chamber 32 of the engine 3 and the transmission 1 inner chamber outside the torque converter 2.

As shown in fig. 3, the check valve 41 is composed of a round steel ball 411 and a stopper seat 412 having a conical surface which is sealingly engaged with the round steel ball 411, and the stopper seat 412 is installed in the second joint 42. The stopper 412 is formed in a cone shape. When the machine is parked on a horizontal plane, the round steel ball 411 is positioned at the large-caliber end of the limiting seat 412 under the action of the self gravity, the check valve 41 is in a conducting state, when the machine is in a climbing state and exceeds a preset angle, the limiting seat 412 is inclined, the round steel ball 411 rolls to the small-caliber end of the limiting seat 412 under the action of the self gravity to be matched and sealed with the conical surface, and oil is prevented from flowing into the connecting cavity 32 from the gearbox 1 through the oil return pipeline 4. The included angle between the bottom edge 414 of the longitudinal section of the conical surface of the limiting seat 412 and the horizontal plane is more than 20 degrees. The bottom edge 412 of the longitudinal section of the conical surface is a line formed by contact points of the conical surface of the limiting seat and the round steel ball before the round steel ball 411 is matched with the conical surface in a sealing mode, when the machine is tilted backwards to a certain angle, the limiting seat is also tilted along with the machine (the check valve rotates clockwise in the figure 3), and the round steel ball 411 rolls on the bottom edge 414 of the longitudinal section of the conical surface. The included angle between the bottom edge 414 of the longitudinal section of the conical surface and the horizontal plane is more than 20 degrees, so that when the climbing angle of the machine is more than 20 degrees, the round steel ball 411 of the check valve 41 rolls to a small-caliber end along the bottom edge 414 of the longitudinal section of the conical surface under the action of self gravity to be matched with the conical surface for sealing, and oil in the gearbox is prevented from entering a connecting cavity through an oil return pipeline.

As shown in fig. 3, the large-caliber end of the stopper base is provided with a stopper mechanism for preventing the round steel ball from coming off, and the stopper mechanism is formed by bending the cylindrical edge of the large-caliber end inwards 412. The limiting mechanism can also be a check ring arranged in the limiting seat.

Claims

1. A power assembly comprises an engine, a hydraulic torque converter and a gearbox which are connected together, and is characterized in that an oil return pipeline which is communicated in a one-way from the engine to the gearbox is arranged between the engine and the gearbox; the first end of the oil return pipeline is connected to the bottom of a connecting cavity between the engine and the hydraulic torque converter and communicated with the inside of the connecting cavity, the second end of the oil return pipeline is connected to the gearbox and communicated with the inside of the gearbox, and the position height of the first end is higher than that of the second end.

2. The powertrain of claim 1, wherein the return line is disposed outside of the housing of the engine, torque converter, and transmission.

3. A power assembly according to claim 1 or 2, wherein the return line comprises a return pipe and a one-way valve disposed in an end fitting of the return pipe.

4. The power assembly according to claim 3, wherein the one-way valve comprises a round steel ball and a limiting seat having a conical surface in sealing fit with the round steel ball, and the limiting seat is mounted in the joint of the oil return pipe.

5. The powertrain according to claim 4, wherein the retainer is formed in a cone shape.

6. The locomotion assembly of claim 5, wherein the included angle between the bottom side of the longitudinal section of the conical surface and the horizontal plane is more than 20 degrees.

7. The powertrain of claim 4, wherein the check valve is located at the second end of the return line.

8. The power assembly according to claim 7, wherein the large-caliber end of the limiting seat is provided with a limiting mechanism for preventing the round steel ball from falling out.

9. The powertrain of claim 8, wherein the limiting mechanism is formed by bending a cylindrical edge of the large-caliber end of the limiting mechanism inwards.

10. A working machine, characterized by a power pack according to any one of claims 1 to 9.