Heavy truck electric drive axle housing and transmission system

Abstract

The invention relates to the field of heavy truck electric drive axles, in particular to a heavy truck electric drive axle housing and transmission system.The heavy truck electric drive axle housing comprises an axle housing body, the axle housing body comprises an axle package and axle tubes arranged on the two sides of the axle package, half shafts are installed in the axle tubes, the axle tubes are communicated with an inner cavity of the axle package, and the axle tubes are arranged in the axle package. One port, close to the axle package, of the axle tube is a lubricating oil port; lubricating oil throttling plates are arranged at the positions, corresponding to the lubricating oil ports in the left side and the right side, of an inner cavity of the axle package respectively, and the lubricating oil throttling plates block the middles of the lubricating oil ports to divide the lubricating oil ports into upper end oil ports and lower end oil ports. When a vehicle inclines, the flowing speed of lubricating oil can be automatically adjusted, it is guaranteed that a bearing in the speed reducer can be fully lubricated even under the extreme condition, and faults caused by poor lubrication are avoided.

Description

Technical Field

[0001] The present invention relates to the field of heavy truck electric drive axles, and in particular to a heavy truck electric drive axle housing and a transmission system. Background Art

[0002] With the continuous development of new energy vehicle technology, the electric drive axle, as one of the core components of new energy vehicles, has received widespread attention for its integration, lightweight and reliability. In the existing technology, the axle housing, as an important component of the electric drive axle, plays a key role in bearing the weight of the entire vehicle.

[0003] In the design of electric drive axles, high-speed bearings are commonly used to meet the requirements of operation at high speeds. However, under certain special working conditions, such as when the vehicle rolls, high-speed bearings may experience insufficient lubrication, resulting in poor lubrication, which in turn affects the working performance and life of the bearings. Although there are many lubrication solutions on the market, most of them are relatively complex and difficult to promote in practical applications. Therefore, developing a simple and efficient lubrication solution to ensure the normal operation of high-speed bearings under various working conditions is also one of the key directions of current research. Summary of the invention

[0004] The purpose of the present invention is to provide a heavy-duty truck electric drive axle housing, which can automatically adjust the flow rate of lubricating oil when the vehicle is tilted, ensuring that the bearings in the reducer can obtain sufficient lubrication even in extreme cases, avoiding failures caused by poor lubrication.

[0005] Another object of the present invention is to provide a transmission system that can automatically adjust the flow rate of the lubricating oil when the vehicle is tilted, ensuring that the bearings in the reducer can obtain sufficient lubrication even in extreme conditions, avoiding failures caused by poor lubrication.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A heavy-duty truck electric drive axle housing comprises a housing body, the housing body comprising a bridge pack and shaft tubes arranged on both sides of the bridge pack, a half shaft is installed in the shaft tube, the shaft tube is connected to the inner cavity of the bridge pack, and a port on the shaft tube close to the bridge pack is a lubricating oil port; lubricating oil throttle plates are respectively arranged in the inner cavity of the bridge pack and corresponding to the lubricating oil ports on the left and right sides, the lubricating oil throttle plates are sealed in the middle of the lubricating oil port to divide the lubricating oil port into an upper oil port and a lower oil port.

[0008] Furthermore, the half shaft is installed in the bridge housing body, and the half shaft is passed through the upper oil port, and the upper part of the lubricating oil throttle plate is arc-shaped and a first gap is formed between the half shaft and the lubricating oil throttle plate.

[0009] Furthermore, a second gap is formed between the lubricating oil throttling plate and the bottom of the bridge pack inner cavity.

[0010] Furthermore, the size of the second gap ranges from 15 to 20 mm.

[0011] Furthermore, a thrust rod support is arranged on the top of the bridge package, and the thrust rod support is U-shaped and is used for installing a V-shaped thrust rod of the suspension.

[0012] Furthermore, upper ends of both side portions of the thrust rod support are respectively provided with pin holes for connecting a V-shaped thrust rod in a suspension system.

[0013] Furthermore, a balance beam support is symmetrically arranged on the bridge housing body and on both sides of the bridge package, and a plurality of bolt holes for connecting the balance beam are opened on the periphery of the balance beam support.

[0014] Furthermore, a boss is provided in the middle of the equalizing beam support, and a threaded hole for connecting a position sensor is provided on the boss.

[0015] Furthermore, brake flanges are respectively provided at the ends of the shaft tubes on both sides, and the brake flanges are used to connect disc brakes.

[0016] A transmission system comprises the heavy truck electric drive axle housing.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The electric drive axle housing and the main reducer housing form a lubricating oil cavity. When the entire electric drive axle is placed horizontally, the lubricating oil is evenly distributed inside the housing and the main reducer housing cavity; when the vehicle rolls, the lubricating oil in the housing and the main reducer housing cavity flows in the direction of the vehicle roll. Due to the presence of the lubricating oil throttle plate, the lubricating oil can only flow through the upper gap (i.e., the upper oil port) or the lower gap (i.e., the lower oil port) when passing through the lubricating oil port. Under the blocking effect of the lubricating oil throttle plate, the flow rate of the lubricating oil is significantly reduced. By setting the lubricating oil throttle plate, the amount of lubricating oil inside the reducer can be reduced slowly when the vehicle rolls. In this way, even in extreme cases, the bearings in the reducer can be fully lubricated, avoiding the phenomenon of poor lubrication of the reducer bearings when rolling, and thus avoiding failures caused by poor lubrication. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the electric drive axle housing of a heavy truck of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the heavy-duty truck electric drive axle housing from another perspective of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the flow direction of lubricating oil in the axle housing of the heavy-duty truck electric drive axle of the present invention.

[0023] In the figure:

[0024] 100-thrust rod support; 101-pin hole;

[0025] 200-balance beam support; 201-boss; 202-threaded hole;

[0026] 300-brake flange; 400-lubricating oil throttle plate; 500-axle tube; 600-bridge housing disc. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] 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.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "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 invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, 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.

[0032] In the description of the present invention, it is also necessary to explain 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 the present invention can be understood according to specific circumstances.

[0033] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] Example 1

[0035] Reference Figure 1-Figure 3 The present embodiment provides a heavy-duty truck electric drive bridge housing, including a bridge housing body, the bridge housing body including a bridge pack and axle tubes 500 arranged on both sides of the bridge pack, the axle tubes 500 are used to install half shafts, the axle tubes 500 are connected to the inner cavity of the bridge pack, and a port on the axle tube 500 close to the bridge pack is a lubricating oil port, the inner cavity of the bridge pack and corresponding to the lubricating oil ports on the left and right sides are respectively provided with lubricating oil throttle plates 400, the lubricating oil throttle plates 400 are sealed in the middle of the lubricating oil port and divide the lubricating oil port into an upper oil port and a lower oil port, the lubricating oil throttle plate 400 can reduce the size of the lubricating oil port, and thus can slow down the flow rate of the lubricating oil when passing through.

[0036] It should be noted that in the electric drive axle system of heavy trucks, the bridge pack refers to the reducer housing, that is, the protective shell that holds the reducer components (such as gears and bearings). The main function of the bridge pack is to protect the internal transmission components and ensure that they can operate normally under various working conditions.

[0037] Lubricating oil throttle plates 400 are provided on the left and right sides of the bridge package. The function of these lubricating oil throttle plates 400 is to control the flow of lubricating oil in the bridge package, especially when the vehicle rolls, it can slow down the flow of lubricating oil, thereby ensuring that the bearings and other key components inside the reducer can obtain sufficient lubrication in various postures.

[0038] The axle housing is part of the heavy truck electric drive axle. It is a large metal shell that supports the entire drive system. It not only protects the internal transmission components, but also plays a load-bearing role. The axle housing is an integrated structure made by a casting process. In the electric drive axle system, the axle housing contains many key components, such as half shafts, gears, bearings, etc. The design of the axle housing needs to have sufficient strength to support the weight of the entire vehicle and remain stable during the vehicle's driving.

[0039] The main reducer housing (main reducer housing) is an important component in the axle housing, which is specially used to accommodate the main reducer. The main function of the main reducer is to reduce the speed of the motor output and increase the torque to drive the vehicle forward. The main reducer housing is also a shell to protect the internal components of the main reducer and prevent the external environment from affecting these precision components. The main reducer housing is closely connected with the axle housing, and together they constitute the main structure of the electric drive axle.

[0040] In this embodiment, the half shaft is installed in the bridge housing body, and the half shaft is inserted into the upper oil port. The upper part of the lubricating oil throttle plate 400 is arc-shaped and a first gap is formed between the half shaft and the bridge housing for the passage of lubricating oil. The front and rear sides of the bridge pack are provided with a bridge housing disc 600, and the lubricating oil throttle plate 400 and the bridge housing disc 600 are cast as one body. The lubricating oil throttle plate 400 and the bottom of the inner cavity of the bridge pack form a second gap, and the size of the second gap ranges from 15 to 20 mm.

[0041] The electric drive axle housing and the main reducer housing form a lubricating oil cavity. When the entire electric drive axle is placed horizontally, the lubricating oil is evenly distributed inside the housing and the main reducer housing cavity. When the vehicle rolls, the lubricating oil in the housing and the main reducer housing cavity flows in the direction of the vehicle roll. Due to the presence of the lubricating oil throttle plate 400, the lubricating oil can only flow through the upper gap (i.e., the upper oil port) or the lower gap (i.e., the lower oil port) when passing through the lubricating oil port. Under the blocking effect of the lubricating oil throttle plate 400, the flow rate of the lubricating oil is significantly reduced. By setting the lubricating oil throttle plate 400, the amount of lubricating oil inside the reducer can be reduced slowly when the vehicle rolls. In this way, even in extreme cases, the bearings in the reducer can be fully lubricated, avoiding the phenomenon of poor lubrication of the reducer bearings when rolling, thereby avoiding failures caused by poor lubrication.

[0042] Therefore, when the vehicle tilts, the lubricating oil does not flow away all at once, but flows slowly, thus ensuring that the bearings are adequately lubricated even in a tilted or extreme roll state.

[0043] In this embodiment, pin holes 101 for connecting the V-shaped thrust rod of the suspension are respectively provided at the upper ends of the two side portions of the thrust rod support 100. The thrust rod support 100 adopts an integrally formed U-shaped structure and is cast integrally with the bridge housing body. The interior of the thrust rod support 100 is a cavity, and the inner cavity of the thrust rod support 100 is connected to the inner cavity of the bridge housing. The pin hole 101 provided on the thrust rod support 100 can be connected to the V-shaped thrust rod by a pin shaft or a locating pin. The thrust rod support 100 is designed as a cavity structure, which can achieve lightweight of the entire bridge while meeting the strength requirements.

[0044] Note: The suspension system of a heavy truck is a device used to connect the vehicle body and wheels. Its main function is to absorb the impact caused by uneven road conditions, ensure the vehicle runs smoothly, and provide good handling and comfort. The V-type thrust rod is a key component in the suspension system, mainly used to transmit the longitudinal force of the vehicle (such as the force generated during acceleration and braking) and lateral force. It usually consists of two arms and its shape is similar to the letter "V", hence the name. One end of the V-type thrust rod is connected to the axle (here specifically the axle housing of the heavy truck electric drive axle), and the other end is connected to the frame.

[0045] In heavy truck electric drive axles, the functions of the V-type thrust rods are as follows:

[0046] 1. Transmit longitudinal forces: When the vehicle accelerates or brakes, the V-shaped thrust rod will transmit these longitudinal forces to the frame to ensure vehicle stability.

[0047] 2. Lateral force transmission: When turning, the V-shaped thrust rod will also transmit lateral force to help maintain the stability of the vehicle.

[0048] The equalizing beam supports 200 are symmetrically arranged on the bridge housing body and on both sides of the bridge package. The outer periphery of the equalizing beam supports 200 is provided with a plurality of bolt holes for connecting the air suspension equalizing beam.

[0049] Air suspension: This is a common heavy truck suspension system that uses air springs instead of traditional steel springs. Air suspension can automatically adjust the height of the vehicle body to improve the comfort and handling of the vehicle.

[0050] Balance beam: This is a device used to balance the load on the wheels on both sides, usually used with air suspension to ensure the stability of the vehicle under various road conditions.

[0051] In this embodiment, the balancing beam supports 200 on both sides are arranged symmetrically about the central plane of the electric drive bridge for installing the balancing beam, and the balancing beam support 200 is provided with four bolt holes for connecting the balancing beam on its periphery, so as to be connected and fixed with the balancing beam by multiple bolts. A boss 201 is provided in the middle of the balancing beam support 200, and a threaded hole 202 for connecting a position sensor is provided on the boss 201.

[0052] The ends of the shaft tube 500 on both sides are respectively provided with brake flanges 300, and the brake flanges 300 are used to connect the disc brakes. The brake flanges 300 are cast integrally with the bridge housing body. There is a spacing of 30 to 40 mm between the end faces of both sides of the bridge housing body and the automatic flanges. This structure serves as a tooling stop to facilitate the installation of the brake.

[0053] The electric drive axle housing has a strong load-bearing capacity and a lightweight design. Electric drive axles often use high-speed bearings, which can slow down the flow rate of lubricating oil and prevent a sudden drop in the amount of lubricating oil in high-speed bearings under special working conditions such as roll.

[0054] Example 2

[0055] A heavy-duty truck electric drive axle comprises the heavy-duty truck electric drive axle housing.

[0056] The main components of heavy truck electric drive axle:

[0057] 1. Electric motor:

[0058] Used to drive the wheels and generate power.

[0059] Usually installed in the axle housing and directly drives the half shaft.

[0060] 2. Reducer:

[0061] Converts the high speed of the electric motor to a low speed suitable for wheel rotation.

[0062] Speed ​​reducers usually contain gears to reduce speed and increase torque.

[0063] 3. Bridge housing:

[0064] The axle housing is a large metal shell that protects the internal transmission components.

[0065] The bridge housing contains core components such as the electric motor and reducer.

[0066] The bridge housing needs to be designed to be strong enough to support the weight of the vehicle and maintain stability during driving.

[0067] 4. Bearings:

[0068] Bearings are used to support rotating parts (such as half shafts).

[0069] Ensure the transmission system can operate smoothly.

[0070] 5. Lubrication system:

[0071] It includes components such as a lubricating oil throttle plate 400, which are used to ensure that bearings and other rotating parts are fully lubricated.

[0072] The lubrication system is particularly important when the vehicle is rolling to avoid wear caused by insufficient lubrication.

[0073] Example 3

[0074] A transmission system comprises the heavy truck electric drive axle.

[0075] The beneficial effects of the technical solution of the present invention are:

[0076] The electric drive axle housing and the main reducer housing form a lubricating oil cavity. When the entire electric drive axle is placed horizontally, the lubricating oil is evenly distributed inside the housing and the main reducer housing cavity. When the vehicle rolls, the lubricating oil in the housing and the main reducer housing cavity flows in the direction of the vehicle roll. Due to the presence of the lubricating oil throttle plate 400, the lubricating oil can only flow through the upper gap (i.e., the upper oil port) or the lower gap (i.e., the lower oil port) when passing through the lubricating oil port. Under the blocking effect of the lubricating oil throttle plate 400, the flow rate of the lubricating oil is significantly reduced. By setting the lubricating oil throttle plate 400, the amount of lubricating oil inside the reducer can be reduced slowly when the vehicle rolls. In this way, even in extreme cases, the bearings in the reducer can be fully lubricated, avoiding the phenomenon of poor lubrication of the reducer bearings when rolling, thereby avoiding failures caused by poor lubrication.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heavy truck electric drive axle housing, comprising a housing body, the housing body comprising a bridge pack and shaft tubes (500) arranged on both sides of the bridge pack, a half shaft is installed in the shaft tube (500), the shaft tube (500) is communicated with the inner cavity of the bridge pack, and a port on the shaft tube (500) close to the bridge pack is a lubricating oil port, characterized in that: Lubricating oil throttle plates (400) are respectively arranged in the inner cavity of the bridge pack and corresponding to the lubricating oil ports on the left and right sides. The lubricating oil throttle plates (400) are sealed in the middle of the lubricating oil ports to divide the lubricating oil ports into an upper oil port and a lower oil port.

2. The heavy truck electric drive axle housing according to claim 1, characterized in that: The half shaft is installed in the bridge housing body and is passed through the upper oil port. The upper part of the lubricating oil throttle plate (400) is in an arc shape and a first gap is formed between the half shaft and the lubricating oil throttle plate (400).

3. The heavy truck electric drive axle housing according to claim 1, characterized in that: The lubricating oil throttle plate (400) and the bottom of the bridge pack inner cavity form a second gap.

4. The heavy truck electric drive axle housing according to claim 3 is characterized in that: The size of the second gap ranges from 15 to 20 mm.

5. The heavy truck electric drive axle housing according to claim 1, characterized in that: A thrust rod support (100) is arranged on the top of the bridge package. The thrust rod support (100) is U-shaped and is used for installing a V-shaped thrust rod of a suspension.

6. The heavy truck electric drive axle housing according to claim 5, characterized in that: The upper ends of both side portions of the thrust rod support (100) are respectively provided with pin holes (101) for connecting a V-shaped thrust rod in a suspension system.

7. The heavy truck electric drive axle housing according to claim 1, characterized in that: Balance beam supports (200) are symmetrically arranged on the bridge housing body and on both sides of the bridge package, and a plurality of bolt holes for connecting the balance beam are opened on the periphery of the balance beam support (200).

8. The heavy truck electric drive axle housing according to claim 7, characterized in that: A boss (201) is arranged in the middle of the equalizing beam support (200), and a threaded hole (202) for connecting a position sensor is provided on the boss (201).

9. The heavy truck electric drive axle housing according to claim 1, characterized in that: The ends of the shaft tubes (500) on both sides are respectively provided with brake flanges (300), and the brake flanges (300) are used to connect to disc brakes.

10. A transmission system, characterized in that: It comprises the heavy-duty truck electric drive axle housing as described in any one of claims 1-9.

Images