CN216382529U

CN216382529U - One-way valve device of gearbox

Info

Publication number: CN216382529U
Application number: CN202123157363.0U
Authority: CN
Inventors: 汪全川; 汪邦勇; 康军波; 莫春峰; 刘晓宇; 肖艳; 熊骏华
Original assignee: Wuhu Wanliyang Transmission Co ltd
Current assignee: Wuhu Wanliyang Transmission Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-04-26
Anticipated expiration: 2031-12-15

Abstract

The utility model discloses a one-way valve device of a gearbox, which comprises a one-way valve assembly, wherein the one-way valve assembly comprises a valve core and an elastic element, the valve core is movably arranged in a gearbox shell and used for sealing an oil outlet of a mechanical pump, the elastic element is used for applying elastic acting force to the valve core, the mechanical pump is provided with a mounting surface used for being in contact with the valve core, and the oil outlet is arranged on the mounting surface. According to the one-way valve device of the gearbox, the mounting surface of the oil outlet of the mechanical pump is used as the sealing surface of the one-way valve, so that the structure of the one-way valve is simplified, the cost and the mounting space are saved, the structural compactness is improved, and the better free layout is realized.

Description

One-way valve device of gearbox

Technical Field

The utility model belongs to the technical field of gearboxes, and particularly relates to a one-way valve device of a gearbox.

Background

Gearboxes with start-stop function generally have two pumps (except for start-stop accumulators): a mechanical pump, an electric pump. When the engine works, the mechanical pump works, and the electric pump does not work. When the engine is flamed out and the start-stop function is started when the start-stop function meets the condition, the electric pump works to maintain the pressure of the hydraulic system line pressure at the moment, and preparation is made for starting the engine again and starting quickly. Double-pump combined hydraulic system in order to prevent mutual interference between the double pumps, a check valve needs to be added at the outlet of the pump. The outlet check valve of the electric pump can prevent hydraulic oil from entering the electric pump when the mechanical pump works. The outlet check valve of the mechanical pump can prevent hydraulic oil from entering the mechanical pump when the electric pump works. Most of the existing check valves are integrated on a mechanical pump body, so that the volume of an oil pump is increased, and the cost is high; some check valves are installed inside the gearbox as a whole, so that the volume is occupied, and the cost is high. These are not compact enough to facilitate the arrangement of the internal components of the whole case.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. The utility model provides a one-way valve device of a gearbox, aiming at improving the structure compactness.

In order to achieve the purpose, the utility model adopts the technical scheme that: the one-way valve device of the gearbox comprises a one-way valve assembly, wherein the one-way valve assembly comprises a valve core and an elastic element, the valve core is movably arranged in a gearbox shell and used for sealing an oil outlet of a mechanical pump, the elastic element is used for applying elastic acting force to the valve core, the mechanical pump is provided with a mounting surface used for being in contact with the valve core, and the oil outlet is arranged on the mounting surface.

A guide valve hole is formed in the transmission shell, and the valve core is inserted into the guide valve hole.

The elastic element is a cylindrical helical spring and is inserted into the guide valve hole.

According to the one-way valve device of the gearbox, the mounting surface of the oil outlet of the mechanical pump is used as the sealing surface of the one-way valve, so that the structure of the one-way valve is simplified, the cost and the mounting space are saved, the structural compactness is improved, and the better free layout is realized.

Drawings

The description includes the following figures, the contents shown are respectively:

FIG. 1 is a schematic representation of the construction of the check valve arrangement of the transmission of the present invention;

FIG. 2 is a schematic view of a closed state of the one-way valve assembly;

FIG. 3 is a schematic view of an open state of the one-way valve assembly;

FIG. 4 is a schematic illustration of the sump structure within the transmission housing;

labeled as: 1. a mechanical pump; 2. an oil outlet; 3. a mounting surface; 4. a transmission housing; 5. a valve core; 6. an elastic element; 7. a U-shaped groove oil duct; 8. a pilot valve bore; 9. an electric pump; 10. a valve body; 11. a one-way valve assembly.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 to 4, the present invention provides a check valve device of a transmission, including a check valve assembly 11. The check valve assembly 11 comprises a valve core 5 movably arranged in the transmission housing 4 and used for closing the oil outlet 2 of the mechanical pump 1 and an elastic element 6 used for applying elastic force to the valve core 5, the mechanical pump 1 is arranged on the transmission housing 4, the mechanical pump 1 is provided with a mounting surface 3 used for being in contact with the valve core 5, and the oil outlet 2 is arranged on the mounting surface 3.

Specifically, as shown in fig. 1 to 4, a guide valve hole 8 is provided in the transmission case 4, and the valve spool 5 is inserted into the guide valve hole 8. The guide valve hole 8 is a finish machining hole in the transmission shell 4, and the check valve does not need to be provided with an additional check valve sleeve, so that cost is saved, and the installation space is better and freely distributed. The elastic member 6 is a cylindrical coil spring and is a compression spring, the elastic member 6 is inserted into the guide valve hole 8, and the elastic member 6 applies an elastic force to the valve body 5 to keep the valve body in contact with the mounting surface 3. The valve core 5 is a cylinder, the mounting surface 3 is a plane perpendicular to the axis of the valve core 5, one end face of the valve core 5 is used for contacting with the mounting surface 3, the end face of the valve core 5 is a plane perpendicular to the axis of the valve core 5, and the diameter of the end face of the valve core 5 is larger than that of the oil outlet 2. The mounting surface 3 is used as a sealing surface of the one-way valve, and the oil outlet 2 can be closed after the end surface of the valve core 5 is contacted with the mounting surface 3 of the mechanical pump 1.

The structure makes full use of internal parts (the mechanical pump 1 and the transmission shell 4) of the gearbox, and realizes the function of adding the one-way valve to the oil outlet 2 of the mechanical pump 1. The plate-type mounting surface 3 of the oil outlet 2 of the mechanical pump 1 is used as a sealing surface of a one-way valve, a finish-machined hole of the transmission housing 4 is used as a motion guide valve hole 8 of a slide valve, the position of the one-way valve is fixed by a bolt for mounting the mechanical pump 1, and the U-shaped groove oil channel 7 of the transmission housing 4 is used for realizing large through-flow capacity. The gearbox has the advantages of low cost, compact structure, space saving and improvement of the degree of freedom of gearbox arrangement. The check valve can realize that when the mechanical pump 1 and the electric pump 9 work independently, the two can not flow mutually, so that the pressure of a hydraulic system is relieved.

As shown in fig. 2 to 4, a U-shaped groove oil passage 7 is provided in the transmission housing 4, after the check valve assembly 11 is opened, the U-shaped groove oil passage 7 is communicated with the oil outlet 2, oil in the oil outlet 2 can enter the U-shaped groove oil passage 7, and the U-shaped groove oil passage 7 is used for guiding the oil to the transmission valve body 10. The width of the U-shaped groove oil duct 7 is smaller than the diameter of the guide valve hole 8, the U-shaped groove oil ducts 7 on the two sides can realize large-flow through capacity after the one-way opening when the movement guide of the one-way valve is not influenced, the throttling loss is less, and the pressure drop is very small.

When the engine runs, the mechanical pump 1 works, the mechanical pump 1 outputs pressure to push the valve core 5 to move in the guide valve hole 8 to compress the elastic element 6, at the moment, the check valve component 11 is opened, and the mechanical pump 1 outputs flow pressure to the gearbox valve body 10. Similarly, as shown in fig. 1, the oil outlet 2 of the electric pump 9 is also provided with a check valve assembly 11, so that hydraulic oil is prevented from entering the electric pump 9 when the mechanical pump 1 works, and the pressure of the hydraulic system is prevented from being relieved.

When the engine runs, the mechanical pump 1 works, the mechanical pump 1 outputs pressure to push the valve core 5 to move in the guide valve hole 8 to compress the elastic element 6, at the moment, the valve core 5 (shown in figure 3) realizes large-flow circulation of the flow of the mechanical pump 1 along the U-shaped groove oil passages 7 on two sides of the one-way valve (shown in figure 4), the throttling loss is less, and the pressure loss of the system is reduced.

When the engine is flamed out and the start-stop function is started when the condition is met, the mechanical pump 1 does not work, the electric pump 9 starts to work, the valve core 5 acts on the valve core 5 under the action of the elastic element 6 and the output pressure of the electric pump 9, so that the end surface of the valve core 5 is tightly attached to the mounting surface 3 of the oil outlet 2 of the mechanical pump 1 to form sealing, and the function of the one-way valve is realized.

The utility model is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the utility model are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the utility model; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims

1. The one-way valve device of the gearbox comprises a one-way valve assembly and is characterized in that: the check valve assembly comprises a valve core which is movably arranged in the transmission shell and used for sealing an oil outlet of the mechanical pump and an elastic element used for applying elastic acting force to the valve core, the mechanical pump is provided with a mounting surface used for being in contact with the valve core, and the oil outlet is arranged on the mounting surface.

2. The check valve device of a transmission according to claim 1, wherein: a guide valve hole is formed in the transmission shell, and the valve core is inserted into the guide valve hole.

3. A check valve device of a transmission according to claim 2, wherein: the elastic element is a cylindrical helical spring and is inserted into the guide valve hole.