Gear for transmission of DCT gearbox

Abstract

The gear for DCT gearbox transmission comprises a gear body, a plurality of oil storage cavities are annularly distributed in the gear body, oil inlet holes and oil outlet holes are formed in the oil storage cavities, the oil outlet holes are located in the side face of the gear body, and at least part of the oil storage cavities of the gear body are soaked in oil. The oil storage cavity is a fan-shaped cavity, a pressure assembly is assembled in the oil storage cavity, the pressure assembly comprises a pressure plate, a torsional spring shaft is assembled on the pressure plate, the torsional spring shaft is assembled in the center of the circle center of the fan-shaped cavity, and the side face of the pressure plate abuts against the inner wall of the oil storage cavity. Each fan-shaped cavity comprises a first radius face and a second radius face, and the extension line where the second radius face is located passes through the axis of the gear. Compared with the prior art, the oil storage cavity and the pressure assembly are arranged in the gear, oil can be directly supplied to the side face of the gear, the lubricating state of the gear under different working conditions is guaranteed, the structure is simple, and maintenance is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of gears for automobile transmissions, and in particular relates to a gear used for DCT transmissions. Background Art

[0002] The gear in the DCT gearbox is one of its core components, responsible for transmitting power and switching between different speed ratios. In order to ensure the efficient operation of the DCT gearbox and extend its service life, gear lubrication is essential. Traditional gear lubrication methods mainly include external spray lubrication and oil immersion lubrication, which have the following disadvantages:

[0003] 1. Under high load or high speed operation, the traditional external spray lubrication method may not be able to continuously provide sufficient lubricating oil, resulting in insufficient lubrication of the gear surface, thereby accelerating the wear of the gear. Especially in DCT gearboxes, due to frequent gear shifting operations, the friction and wear of the gear surface are more serious.

[0004] 2. External spray lubrication requires an oil supply system and nozzle that are independent of the gear transmission structure. Once the external oil supply system fails or the nozzle is clogged, the lubrication effect of the gear will be greatly reduced. In addition, the external spray lubrication solution has a complex structure, which not only increases maintenance costs, but also increases the workload of operators. For DCT gearboxes, this frequent maintenance requirement will increase the user's cost and inconvenience. Summary of the invention

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions.

[0006] A gear for DCT transmission includes a gear body, wherein the gear body is provided with a plurality of oil storage chambers arranged around the inner ring, wherein the oil storage chamber is provided with an oil inlet hole and an oil outlet hole, wherein the oil outlet hole is located on the side of the gear body, and at least part of the oil storage chamber of the gear body is immersed in oil. The oil storage chamber is a fan-shaped chamber, wherein a pressure assembly is installed in the oil storage chamber, wherein the pressure assembly includes a pressure plate, wherein a torsion spring shaft is installed on the pressure plate, wherein the torsion spring shaft is installed at the center of the circle of the fan-shaped chamber, and the side surface of the pressure plate abuts against the inner wall of the oil storage chamber. The fan-shaped chamber includes a first radius surface and a second radius surface, wherein the extension line of the second radius surface passes through the gear axis. In a stationary state, the pressure plate abuts against the first radius surface under the action of the torsion spring shaft.

[0007] As a preferred technical solution for gears used in DCT gearbox transmission, the oil outlet hole is located on the extension line of the second radius surface.

[0008] As a preferred technical solution for gears used in DCT gearbox transmission, at least the side surface portion of the pressure plate is made of soft rubber material.

[0009] As a preferred technical solution for gears used in DCT gearbox transmission, an oil storage block is installed in the oil storage chamber, and the oil storage block is made of oil-absorbing material.

[0010] As a preferred technical solution for a gear used in a DCT gearbox transmission, the oil inlet hole is located on the axial end face of the gear body and passes through the gear body, and the oil inlet hole is close to the first radius surface.

[0011] As a preferred technical solution for a gear used in a DCT gearbox transmission, the gear body is assembled from a first half body and a second half body. The first half body and the second half body are provided with assembly holes for assembly, and the assembly holes are distributed around the oil storage chamber.

[0012] Compared with the prior art, this application has the following beneficial effects:

[0013] 1. An oil storage chamber and a pressure component driven by centrifugal force are arranged in the gear body. The pressure component can discharge the oil entering the oil storage chamber to the gear teeth and tooth groove surfaces of the gear body, thereby continuously lubricating the gear surface, reducing the wear caused by insufficient lubrication, and ensuring the lubrication state of the gear under different working conditions.

[0014] 2. Compared with the traditional external spraying method, this built-in lubrication system not only reduces dependence on the external environment, but also reduces the frequency of regular inspection and addition of lubricating oil, simplifying daily maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the gear body.

[0016] Figure 2 It is a schematic diagram of the structure of the gear body.

[0017] Figure 3 It is a structural cross-sectional view of the gear body.

[0018] The following is a description of the markings in the accompanying drawings of the specification:

[0019] 100, gear body; 101, assembly hole; 110, oil storage chamber; 111, oil inlet hole; 112, oil outlet hole; 120, pressure plate; 121, torsion spring shaft; 130, first half body; 140, second half body; 150, oil storage block. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meaning of the above terms in this practicality according to the specific circumstances.

[0023] Reference Figures 1 to 3 A gear for DCT transmission includes a gear body 100, wherein the gear body 100 is provided with a plurality of oil storage chambers 110, wherein the oil storage chambers 110 are provided with oil inlet holes 111 and oil outlet holes 112, wherein the oil outlet holes 112 are located on the side of the gear body 100, and at least part of the oil storage chambers 110 of the gear body 100 is immersed in oil. The oil storage chamber 110 is a fan-shaped chamber, wherein a pressure assembly is installed in the oil storage chamber 110, wherein the pressure assembly includes a pressure plate 120, wherein a torsion spring shaft 121 is installed on the pressure plate 120, wherein the torsion spring shaft 121 is installed at the center of the circle of the fan-shaped chamber, and the side of the pressure plate 120 abuts against the inner wall of the oil storage chamber 110. The fan-shaped chamber includes a first radius surface and a second radius surface, wherein the extension line of the second radius surface passes through the gear axis. In a stationary state, the pressure plate 120 abuts against the first radius surface under the action of the torsion spring shaft 121. This design enables the pressure plate 120 to rotate by utilizing centrifugal force when the gear accelerates, exerting pressure on the oil in the oil storage chamber 110 , thereby effectively squeezing the oil out of the oil outlet 112 .

[0024] Specifically, the oil outlet hole 112 is located on the extension line of the second radius surface. This design ensures that no matter what state the pressure plate 120 is in, the oil can flow out smoothly from the oil outlet hole 112. At least the side portion of the pressure plate 120 is made of a soft rubber material. The soft rubber material can better fit the inner wall of the oil storage chamber 110 to reduce the possibility of leakage, and can produce appropriate deformation under pressure to improve the sealing and lubrication effects. The oil inlet hole 111 is located on the axial end face of the gear body 100 and passes through the gear body 100, and the oil inlet hole 111 is close to the first radius surface. This design facilitates the oil to enter the first oil chamber from the outside, simplifies the oil circuit structure, and improves the convenience and efficiency of oil replenishment.

[0025] For the convenience of manufacturing, the gear body 100 is assembled from a first half body 130 and a second half body 140. The first half body 130 and the second half body 140 are provided with assembly holes 101 for assembly, and the assembly holes 101 are distributed around the oil storage chamber 110. The split design is convenient for manufacturing and assembly, and the distribution of the assembly holes 101 ensures the sealing of the oil storage chamber 110.

[0026] In addition, the oil storage chamber 110 is equipped with an oil storage block 150, and the oil storage block 150 is made of oil-absorbing material. The oil storage block 150 can increase the residence time of the oil in the oil storage chamber 110, prevent the oil from being squeezed out in a short time, ensure that the gear body 100 can still provide sufficient oil under long-term operation or high-load conditions, and improve the reliability and durability of the system. At the same time, the oil storage block 150 also has a filtering function, which can filter impurities in the oil entering the oil storage chamber 110, and prevent impurities from damaging the gear teeth and tooth groove surfaces of the gear body 100 when the gears are engaged and transmitted.

[0027] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A gear for DCT gearbox transmission, characterized in that: The gear body (100) comprises a plurality of oil storage chambers (110) arranged in an inner ring, the oil storage chambers (110) are provided with oil inlet holes (111) and oil outlet holes (112), the oil outlet holes (112) are located on the side of the gear body (100), and at least part of the oil storage chambers (110) of the gear body (100) is immersed in oil; The oil storage chamber (110) is a fan-shaped chamber. A pressure assembly is installed in the oil storage chamber (110). The pressure assembly includes a pressure plate (120). A torsion spring shaft (121) is installed on the pressure plate (120). The torsion spring shaft (121) is installed at the center of the circle of the fan-shaped chamber. The side surface of the pressure plate (120) abuts against the inner wall of the oil storage chamber (110). The fan-shaped chamber includes a first radius surface and a second radius surface. The extension line of the second radius surface passes through the gear axis. In a stationary state, the pressure plate (120) abuts against the first radius surface under the action of the torsion spring shaft (121).

2. A gear for DCT transmission according to claim 1, characterized in that: The oil outlet hole (112) is located on the extension line of the second radius surface.

3. The gear for DCT transmission according to claim 1, characterized in that: At least a side surface portion of the pressure plate (120) is made of a soft rubber material.

4. The gear for DCT transmission according to claim 1, characterized in that: An oil storage block (150) is housed in the oil storage chamber (110), and the oil storage block (150) is made of an oil absorbing material.

5. The gear for DCT transmission according to claim 1, characterized in that: The oil inlet hole (111) is located on the axial end surface of the gear body (100) and passes through the gear body (100), and the oil inlet hole (111) is close to the first radius surface.

6. The gear for DCT transmission according to claim 1, characterized in that: The gear body (100) is assembled from a first half body (130) and a second half body (140); the first half body (130) and the second half body (140) are provided with assembly holes (101) for assembly, and the assembly holes (101) are distributed around the oil storage chamber (110).

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