A high-speed gearbox for testing the transmission system of new energy vehicles

Abstract

The utility model relates to a high-speed gearbox for testing a new energy vehicle transmission system, comprising a gearbox housing, an internal gear shaft, a bilaterally symmetrical input end and output end and a lubrication guarantee system, an output labyrinth seal retaining ring and an output outer bearing cover symmetrically arranged and mounted on the output shaft, and an output flange symmetrically arranged and connected to the output shaft through a spline, which together form a labyrinth seal through an output sealing ring matched with the periphery, and form a closed space between the inner side of the sealing retaining cover and the output outer bearing cover. The utility model can prevent the gearbox lubricating oil gas from leaking to the outside, and reduce the pollution of the gearbox lubricating oil to the test site.

Description

Technical Field

[0001] The utility model relates to the field of new energy vehicle transmission testing, in particular to a high-speed gearbox for testing a new energy vehicle transmission system. Background Art

[0002] At present, a dual test system bench equipment (201821932372.8) can solve the problem that the test system of traditional electric vehicle drive motors, gearboxes and other components and controllers is generally divided into two experimental benches for separate testing, and the direct connection structure used in the traditional test system bench equipment has a small speed coverage range and cannot meet the current development trend; the shaft system does not have a real-time dynamic vibration monitoring function and cannot reflect the mechanical failure of the system in time; the system installation base does not have the natural frequency adjustment function and cannot effectively avoid the resonance area; it does not have a real-time dynamic road load simulation function; it does not have the function of testing two different performance test pieces at the same time, and two sets of test equipment cannot be built at the same time. It includes test piece 1 and a bearing seat on one side of it, one side of the bearing seat is connected to the dynamometer, one side of the dynamometer is installed with a speed increase box, and the test piece 2 is installed on the side wall of the speed increase box.

[0003] For this application of high-speed gearbox, the lubrication method is oil-gas lubrication. Traditional oil seals are no longer applicable. Labyrinth seals are usually used. Generally, a labyrinth seal is a plurality of annular sealing teeth arranged in sequence on the periphery of the shaft. The interception gap and expansion cavity formed between the teeth are used to make the oil and gas produce a throttling effect when passing through the gap of the tortuous labyrinth, thereby achieving the purpose of preventing oil and gas leakage. However, in actual high-speed applications, a small amount of oil and gas will still leak into the surrounding environment, and there is a risk of oil leakage.

[0004] In view of the above-mentioned defects, the designer actively conducts research and innovation in order to create a new type of high-speed gearbox for testing the transmission system of new energy vehicles, so as to make it more valuable for industrial use. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a high-speed gearbox for testing a new energy vehicle transmission system.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-speed gearbox for testing a new energy vehicle transmission system comprises a gearbox housing, one side of the gearbox housing is connected to an input shaft assembly, the other side of the gearbox housing is connected to an output shaft assembly, the input shaft assembly and the output shaft assembly are meshed and driven through gears in the gearbox housing, the output shaft assembly comprises an output shaft, an output bearing seat and an output bearing, the output bearing seat is installed in the gearbox housing, the output shaft is connected to the output bearing seat through the output bearing, an output labyrinth sealing retaining ring is sleeved on the output shaft, an output flange is connected to the output shaft, an output sealing ring is sleeved on the output flange, an output outer bearing cover is connected to the output bearing seat, an annular protrusion of the output outer bearing cover is embedded in an annular groove of the output labyrinth sealing retaining ring and forms a first seal, a first channel connected to the gearbox housing is opened on the output bearing seat, the output sealing ring is interference-mounted in the mounting hole of the output outer bearing cover, a first annular tooth and a second annular tooth are sequentially arranged from the inside to the outside on the outer wall of the output flange, and the output A first sealing annular tooth and a second sealing annular tooth are provided on the inner wall of the sealing ring, the first annular tooth is connected with the first sealing annular tooth to form a second seal, the second annular tooth is connected with the second sealing annular tooth to form a third seal, a second channel is provided on the output sealing ring, a first connecting hole connected with the second channel is provided on the first sealing annular tooth and the second sealing annular tooth, the second channel is connected with the gear box housing through the main oil return pipe, a fourth seal is provided between the output flange and the output sealing ring, the fourth seal is located on the outside of the third seal, a third channel is provided on the output sealing ring, a second connecting hole connected with the through hole of the third channel is provided on the output flange, the third channel is connected with the gear box housing through the auxiliary oil return pipe, a sealing cover for sealing the output sealing ring is connected to the output outer bearing cover, a closed space is provided between the sealing cover, the output sealing ring and the output outer bearing cover, and a first compressed air inlet and a second compressed air inlet connected with the closed space are provided on the sealing cover.

[0008] Preferably, in the high-speed gearbox for testing the transmission system of a new energy vehicle, the output flange is connected to the output shaft via a spline and is also fixed via bolts.

[0009] Preferably, in the high-speed gearbox for testing the transmission system of a new energy vehicle, the output flange presses the output labyrinth seal ring onto the output shaft.

[0010] Preferably, in the high-speed gearbox for testing the transmission system of a new energy vehicle, the output outer bearing cover is connected to the output bearing seat by bolts.

[0011] Preferably, in the high-speed gearbox for testing the transmission system of a new energy vehicle, the sealing cover is connected to the output outer bearing cover by bolts.

[0012] By means of the above solution, the utility model has at least the following advantages:

[0013] The utility model forms a micro-pressure environment on the outside of the labyrinth seal by introducing a small amount of compressed air into the side of the labyrinth seal close to the external environment, so that all the lubricating oil gas returns to the oil pool of the box body through the oil return pipeline, thereby avoiding leakage of the gear box lubricating oil gas to the outside, reducing the pollution of the gear box lubricating oil to the test site, and also reducing the risk of insufficient gear box lubricating oil due to excessive loss of lubricating oil after the gear box has been running for a long time.

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of . DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] Public patent: A speed-up box for testing the transmission system of new energy vehicles (CN202222553028.0). This patent discloses the structure of the input shaft assembly, gears and output shaft assembly inside the high-speed gearbox of the utility model, and no further elaboration will be made.

[0022] Example

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, a high-speed gearbox for testing a new energy vehicle transmission system includes a gearbox housing 1, one side of the gearbox housing 1 is connected to an input shaft assembly, and the other side of the gearbox housing 1 is connected to an output shaft assembly, the input shaft assembly and the output shaft assembly are meshed and driven through the gears in the gearbox housing 1, the output shaft assembly includes an output shaft 6, an output bearing seat 10 and an output bearing 11, the output bearing seat 10 is installed in the gearbox housing 1, the output shaft 6 is connected to the output bearing seat 10 through the output bearing 11, and the output shaft 6 is provided with an output labyrinth seal The output shaft 6 is connected to an output flange 5, and an output sealing ring 8 is mounted on the output flange 5. The output bearing seat 10 is connected to an output outer bearing cover 9. The annular protrusion of the output outer bearing cover 9 is embedded in the annular groove of the output labyrinth sealing ring 7 and forms a first seal b1. The output bearing seat 10 is provided with a first channel c1 connected to the gear box body 1. The output sealing ring 8 is interference-mounted in the mounting hole of the output outer bearing cover 9. The outer wall of the output flange 5 is provided with a first annular tooth and a second annular tooth in sequence from the inside to the outside. The output seal The inner wall of the ring 8 is provided with a first sealing annular tooth and a second sealing annular tooth, the first annular tooth is connected with the first sealing annular tooth to form a second sealing b2, the second annular tooth is connected with the second sealing annular tooth to form a third sealing b3, the output sealing ring 8 is provided with a second channel c2, the first sealing annular tooth and the second sealing annular tooth are both provided with a first connecting hole connected to the second channel c2, the second channel c2 is connected to the gear box body 1 through the main oil return pipe 2, and a fourth sealing b4 is provided between the output flange 5 and the output sealing ring 8. b4 is located on the outside of the third seal b3, a third channel c3 is provided on the output sealing ring 8, a second connecting hole connected to the third channel c3 is provided on the output flange 5, the third channel c3 is connected to the gearbox housing 1 through the auxiliary oil return pipe 3, a sealing cover 4 for sealing the output sealing ring 8 is connected to the output outer bearing cover 9, a closed space d is provided between the sealing cover 4 and the output sealing ring 8 and the output outer bearing cover 9, and a first compressed air inlet a1 and a second compressed air inlet a2 connected to the closed space are provided on the sealing cover 4.

[0024] The above-mentioned first annular teeth are connected with the first sealing annular teeth to form a second seal, and the second annular teeth are connected with the second sealing annular teeth to form a third seal. The interception gap and expansion cavity formed between the teeth are also used to make the oil and gas produce a throttling effect when passing through the gap of the tortuous maze, thereby achieving the purpose of preventing oil and gas leakage. At the same time, a small amount of compressed air is introduced into the side of the sealing cover 4 close to the external environment to form a micro-pressure environment, so that all the lubricating oil and gas are returned to the gear box oil pool through the return oil pipeline to prevent oil and gas leakage.

[0025] The output flange 5 in the utility model is connected to the output shaft 6 through a spline and is also fixed by bolts. At the same time, the output flange 5 presses the output labyrinth seal retaining ring 7 onto the output shaft 6 .

[0026] The output outer bearing cover 9 in the utility model is connected to the output bearing seat 10 by bolts.

[0027] The sealing cover 4 in the utility model is connected to the output outer bearing cover 9 by bolts.

[0028] The working principle of the utility model is as follows:

[0029] During specific operation, an appropriate amount of compressed air (controlled by technicians in this field) is introduced into the first compressed air inlet a1 and the second compressed air inlet a2, so that the pressure in the closed space d is greater than the internal pressure of the labyrinth seal generated by the high-speed rotation of the shaft, thereby forming a micro-pressure environment on the side of the labyrinth seal close to the external environment. In this way, all the lubricating oil and gas at the labyrinth seal will pass through the second channel c2 and the third channel c3 and then be discharged back to the oil pool of the gear box body 1 through the main oil return pipe 2 and the auxiliary oil return pipe 3, thereby preventing the lubricating oil and gas from leaking into the atmosphere.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of this application, it should be noted that the terms "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A high-speed gearbox for testing a new energy vehicle transmission system, comprising a gearbox housing (1), one side of the gearbox housing (1) is connected to an input shaft assembly, and the other side of the gearbox housing (1) is connected to an output shaft assembly, the input shaft assembly and the output shaft assembly are meshed and driven by gears in the gearbox housing (1), the output shaft assembly comprises an output shaft (6), an output bearing seat (10) and an output bearing (11), the output bearing seat (10) is installed in the gearbox housing (1), and the output shaft (6) is connected to the output bearing seat (10) via the output bearing (11), characterized in that: The output shaft (6) is provided with an output labyrinth seal retaining ring (7), the output shaft (6) is connected with an output flange (5), the output flange (5) is provided with an output seal ring (8), the output bearing seat (10) is connected with an output outer bearing cover (9), the annular protrusion of the output outer bearing cover (9) is embedded in the annular groove of the output labyrinth seal retaining ring (7) and forms a first seal (b1), the output bearing seat (10) is provided with a first hole (c1) which is connected with the gear box housing (1) 1), the output sealing ring (8) is interference-mounted in the mounting hole of the output outer bearing cover (9), the outer wall of the output flange (5) is provided with a first annular tooth and a second annular tooth in sequence from the inside to the outside, the inner wall of the output sealing ring (8) is provided with a first sealing annular tooth and a second sealing annular tooth, the first annular tooth is connected with the first sealing annular tooth to form a second seal (b2), the second annular tooth is connected with the second sealing annular tooth to form a third seal (b3), the output sealing ring (8) is provided with a second channel ( c2), the first sealing annular tooth and the second sealing annular tooth are each provided with a first communicating hole connected to the second hole (c2), the second hole (c2) is connected to the gear box housing (1) through a main oil return pipe (2), a fourth seal (b4) is provided between the output flange (5) and the output sealing ring (8), the fourth seal (b4) is located outside the third seal (b3), the output sealing ring (8) is provided with a third hole (c3), the output flange (5) is provided with a hole connected to the first hole (c2), the second hole (c2) is connected to the gear box housing (1) through a main oil return pipe (2), a fourth seal (b4) is provided between the output flange (5) and the output sealing ring (8), the fourth seal (b4) is located outside the third seal (b3), the output sealing ring (8) is provided with a third hole (c3), The third hole (c3) is connected to the gear box body (1) through the auxiliary oil return pipe (3); the output outer bearing cover (9) is connected to a sealing cover (4) for sealing the output sealing ring (8); a closed space (d) is provided between the sealing cover (4), the output sealing ring (8) and the output outer bearing cover (9); and the sealing cover (4) is provided with a first compressed air inlet (a1) and a second compressed air inlet (a2) which are connected to the closed space.

2. A high-speed gearbox for testing a new energy vehicle transmission system according to claim 1, characterized in that: The output flange (5) is connected to the output shaft (6) via a spline and is also fixed via bolts.

3. A high-speed gearbox for testing a new energy vehicle transmission system according to claim 1, characterized in that: The output flange (5) presses the output labyrinth seal retaining ring (7) onto the output shaft (6).

4. A high-speed gearbox for testing a new energy vehicle transmission system according to claim 1, characterized in that: The output outer bearing cover (9) is connected to the output bearing seat (10) by means of bolts.

5. A high-speed gearbox for testing a new energy vehicle transmission system according to claim 1, characterized in that: The sealing cover (4) is connected to the output outer bearing cover (9) by means of bolts.

Images