Hybrid drive rear axle structure

Abstract

The invention discloses a hybrid drive rear axle structure which is provided with two groups of split half shafts, one of each group of split half shafts is connected with a brake disc, and the other group of split half shafts is connected with a hub motor; another two groups of split bridges connected through bolts are arranged, one of each group of split bridges is connected with the gearbox, and the other group of split bridges is connected with the brake caliper; according to the structural design, a brake device is moved to a split half shaft from a traditional wheel end, a space is reserved for arranging a hub motor to achieve hybrid power, and the motor further has the function of recycling kinetic energy; compared with a hub motor of an existing integrated brake system, the weight of the wheel end is reduced by about 50%; the hub motor is not integrated with a brake system any more, large space is released, and more direct convenience is brought to follow-up modification; the high temperature brought by the brake system during working does not affect the work of the hub motor set, and the heat dissipation efficiency is also greatly improved; and a fuel vehicle can be changed into a hybrid vehicle at lower cost, so that the energy consumption is obviously reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile transmission systems, and in particular to a hybrid drive rear axle structure. Background Art

[0002] Wheel hub drive and wheel hub motor drive axle are common rear axle structures in existing trucks. As a technology that combines wheel hub motors with traditional drive axles, it aims to assist vehicle driving or improve performance through the power provided by the motor. However, this drive axle has some obvious disadvantages: the integration of wheel hub motors requires additional space and mechanical structure, which increases manufacturing and installation costs; the braking system is concentrated at the end, and the unsprung mass of the wheel hub drive axle is too high, affecting the vehicle's suspension performance and ride comfort; the motor generates heat when it runs, and the lack of an effective heat dissipation system may cause the temperature to be too high, affecting performance and life. Summary of the invention

[0003] The purpose of the present invention is to provide a new technical solution for a hybrid drive rear axle structure to solve the problems listed in the background technology. At the same time, this solution can be used to convert a fuel vehicle into a hybrid vehicle at a relatively low cost. The motor can realize kinetic energy recovery and significantly reduce energy consumption. It is particularly suitable for heavy trucks or dump trucks used in mines, and for vehicles that pursue handling performance.

[0004] The present invention provides a hybrid drive rear axle structure, comprising a gearbox (1), a differential (2), a brake disc (9), a wheel hub motor (7), and a brake caliper (8), and is characterized in that it also comprises two groups of split half-axles, each group of split half-axles is provided with a first split half-axle (3) and a second split half-axle (4), and also comprises two groups of split bridges, each group of split bridges is provided with a first split bridge (5) and a second split bridge (6), and the two groups of split half-axles and the two split bridges are symmetrically arranged.

[0005] The differential (2) is fixedly connected to one end (3) of the first split half-shaft; the other end of the first split half-shaft (3) is fixedly connected to one end of the brake disc (9); the other end of the brake disc (9) is fixedly connected to one end of the second split half-shaft (4); and the other end of the second split half-shaft (4) is fixedly connected to the wheel hub motor (7).

[0006] One end of the first split bridge (5) is fixedly connected to the gearbox (1); the other end of the first split bridge (5) is fixedly connected to one end of the second split bridge (6), and the other end of the second split bridge (6) is rotatably connected to the wheel hub motor (7); the connection surface between the first split bridge (5) and the second split bridge (6) is a semi-open structure, and a cavity (12) is formed by bolt connection for mounting a brake disc (9);

[0007] The brake caliper (8) is fixedly mounted on the split bridge assembly.

[0008] Through the above scheme, the power transmission path of the gearbox is the differential, the first split half-shaft, the brake disc, the second split half-shaft, and the hub motor.

[0009] Through the above structure and its position setting, the brake caliper is changed from being fixed on the vehicle suspension in the traditional way to being fixed on the split bridge arranged in the middle of the entire rear axle structure; the brake disc is installed at the connection of the split half-axle group, which is also in the middle of the entire rear axle structure; the cavity formed by the connection surface of the split bridge group can facilitate the placement of the brake disc, that is, the position of the brake disc is also transferred from the traditional wheel end to the middle of the hybrid drive rear axle structure, thereby reducing the wheel end weight and improving the vehicle's handling.

[0010] Preferably, the brake caliper (8) is installed on a side of the first split bridge (5) or the second split bridge (6) close to the wheel hub motor (7).

[0011] Preferably, the first split bridge (5), the second split bridge (6) and the brake caliper (8) are fixedly connected by the same bolt.

[0012] With this technical solution, the first split bridge (5), the second split bridge (6) and the brake caliper (8) are provided with connection holes at the same position, and can be installed and fixed by the same bolt or the same group of bolts, which is convenient for installation.

[0013] Preferably, the first split half-shaft and the second split half-shaft (4) are respectively connected to the brake disc (9) via splines, and connected to the wheel hub motor (7) via bolts.

[0014] Through this technical solution, the split half-axle assembly realizes the connection of the brake disc and the hub motor through commonly used connectors such as splines and bolts.

[0015] Preferably, the first split bridge (5) is connected to the gearbox (1) via bolts.

[0016] Preferably, the other end of the second split bridge (6) is connected to the hub motor (7) via a bearing.

[0017] Beneficial effects of the present invention:

[0018] 1. Compared with the hub motor with integrated braking system, the wheel end weight is reduced by about 50%;

[0019] 2. The current disc brakes and wheel hub motors generally weigh 20kg-50kg depending on the power and braking force requirements, but the weight of the brakes matched to the same vehicle is generally greater than the weight of the wheel hub motor. Moving the braking system to the half-axle that does not affect the unsprung mass reduces the wheel end weight and improves vehicle handling;

[0020] 3. Since the hub motor no longer integrates the braking system, the space available for layout will be greatly increased, bringing more direct convenience for subsequent modification; the braking system is transferred from the wheel hub to the split half-axle, and the high temperature generated during operation will not affect the operation of the hub motor unit, and the heat dissipation efficiency will also be greatly improved.

[0021] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0023] Figure 1 It is the front view of the appearance structure of the present invention.

[0024] Figure 2 It is a side view of the appearance structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the connection structure of the split bridge group of the present invention. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] Embodiment 1:

[0033] The present invention provides a hybrid drive rear axle structure, including a gearbox 1, a differential 2, a brake disc 9, a hub motor 7, and a brake caliper 8, and is characterized in that it also includes two groups of split half-shafts, each group of split half-shafts is provided with a first split half-shaft 3 and a second split half-shaft 4, and also includes two groups of split bridges, each group of split bridges is provided with a first split bridge 5 and a second split bridge 6, and the two groups of split half-shafts are symmetrically arranged with the two split bridges.

[0034] The differential 2 is connected to one end 3 of the first split half-shaft; the other end of the first split half-shaft 3 is fixedly connected to one end of the brake disc 9 via a spline; the other end of the brake disc 9 is fixedly connected to one end of the second split half-shaft 4 via a spline; the other end of the second split half-shaft 4 is fixedly connected to the hub motor 7 via bolts.

[0035] One end of the first split bridge 5 is connected to the gearbox 1 by bolts; the other end of the first split bridge 5 is connected to one end of the second split bridge 6, and the other end of the second split bridge 6 is rotatably connected to the hub motor 7 through a bearing; the connecting surface between the first split bridge 5 and the second split bridge 6 is a semi-open structure, and a cavity 12 is formed by bolt connection for installing the brake disc 9;

[0036] The brake caliper 8 is installed on a side of the first split bridge 5 close to the wheel hub motor 7 and is fixedly installed with the first split bridge 5 and the second split bridge 6 by bolts.

[0037] Through the above scheme, the power transmission path of the gearbox is the differential, the first split half-axle, the brake disc, the second split half-axle, and the wheel hub motor; the brake caliper is changed from being fixed on the vehicle suspension in the traditional way to being fixed on the split bridge arranged in the middle of the entire rear axle structure; the brake disc is installed at the connection of the split half-axle group, which is also in the middle of the entire rear axle structure; the cavity formed by the connecting surface of the split bridge group can conveniently place the brake disc, that is, the position of the brake disc is also transferred from the traditional wheel end to the middle of the hybrid drive rear axle structure, reducing the wheel end weight and improving the vehicle's handling; the first split bridge 5, the second split bridge 6 and the brake caliper 8 are provided with the same connecting holes, and the installation and fixing can be completed by the same or the same group of bolts, which is easy to install, and the split half-axle group realizes the connection of the brake disc and the wheel hub motor through commonly used splines, bolts and other connectors.

[0038] Embodiment 2:

[0039] The differential 2 is connected to one end 3 of the first split half shaft; the other end of the first split half shaft 3 is fixedly connected to one end of the brake disc 9 by bolts; the other end of the brake disc 9 is fixedly connected to one end of the second split half shaft 4 by bolts; the brake caliper 8 is installed on the side of the second split axle 6 close to the wheel hub motor 7, and other technical features are the same as those of embodiment 1.

[0040] Working principle description:

[0041] The differential is connected to the first split half-shaft through a spline to transmit torque, the first split half-shaft is fixedly connected to the brake disc through a spline / bolt, the brake disc is fixedly connected to the second split half-shaft through a spline / bolt, and the second split half-shaft is fixedly connected to the hub motor through bolts; the power transmission path of the gearbox is: differential, first split half-shaft, brake disc, second split half-shaft, hub motor.

[0042] The first split bridge is fixedly connected to the gearbox by bolts, the second split bridge is connected to the first split bridge by bolts, the brake caliper is connected to the second split bridge or the first split bridge by bolts, and the brake device is moved from the traditional wheel end to the half-axle; the first split bridge is connected to the gearbox by bolts, the first split bridge is connected to the second split bridge by bolts, the brake caliper is connected to the second split bridge by bolts, and a bearing is arranged between the second split bridge and the wheel hub motor, which can improve the stability of the shell; the connecting end surface of the first split bridge and the second split bridge is semi-open, forming a cavity that not only leaves space for the brake disc, but also facilitates assembly. In this way, the brake device is moved from the traditional wheel end to the half-axle, improving the maneuverability of the vehicle.

[0043] It should be noted that the above detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0046] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0047] For ease of description, spatially relative terms, such as "above", "above", "on the upper surface of", "above", etc., may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0048] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein.

[0049] The above are only preferred embodiments of the present invention and are 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 hybrid drive rear axle structure, comprising a gearbox (1), a differential (2), a brake disc (9), a wheel hub motor (7), and a brake caliper (8), characterized in that: It also includes two groups of split semi-axles, each group of split semi-axles is provided with a first split semi-axle (3) and a second split semi-axle (4), and it also includes two groups of split bridges, each group of split bridges is provided with a first split bridge (5) and a second split bridge (6), and the two groups of split semi-axles and the two groups of split bridges are symmetrically arranged; The differential (2) is fixedly connected to one end (3) of the first split half-shaft; the other end of the first split half-shaft (3) is fixedly connected to one end of the brake disc (9); the other end of the brake disc (9) is fixedly connected to one end of the second split half-shaft (4); the other end of the second split half-shaft (4) is fixedly connected to the wheel hub motor (7); One end of the first split bridge (5) is fixedly connected to the gearbox (1); The other end of the first split bridge (5) is fixedly connected to one end of the second split bridge (6), and the other end of the second split bridge (6) is rotationally connected to the wheel hub motor (7); The connection surface between the first split bridge (5) and the second split bridge (6) is a semi-open structure, and is connected by bolts to form a cavity (12) for installing a brake disc (9); The brake caliper (8) is fixedly mounted on the split bridge assembly.

2. The hybrid drive rear axle structure according to claim 1, characterized in that: The brake caliper (8) is installed on a side of the first split bridge (5) or the second split bridge (6) close to the wheel hub motor (7).

3. The hybrid drive rear axle structure according to claim 1, characterized in that: The first split bridge (5), the second split bridge (6) and the brake caliper (8) are fixedly connected via the same bolt.

4. The hybrid drive rear axle structure according to claim 1, characterized in that: The first split half-shaft and the second split half-shaft (4) are respectively connected to the brake disc (9) via splines and connected to the wheel hub motor (7) via bolts.

5. The hybrid drive rear axle structure according to claim 1, characterized in that: The first split bridge (5) is connected to the gearbox (1) via bolts.

6. The hybrid drive rear axle structure according to claim 1, characterized in that: The other end of the second split bridge (6) is connected to the wheel hub motor (7) via a bearing.

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