Dual-motor and gearbox integrated driving assembly

Abstract

The utility model discloses a double-motor and gear box integrated driving assembly which comprises a double-input gear box and a double-output gear box. A sliding bush is embedded into an input shaft at the end of the double-input gear box, a torsion limiting shear pin is relatively and fixedly connected to one side of the outer surface of the sliding bush, internal splines are distributed on the inner wall of the sliding bush at equal intervals, axial motors are symmetrically distributed on the outer side of the input shaft of the double-input gear box in a group, and spline shafts are fixedly connected to one ends of output shafts of the axial motors. The spline shaft and the inner spline are fixedly connected and matched. The double-motor arrangement is adopted, the energy consumption of a vehicle can be reduced, meanwhile, the motor abrasion is reduced, the double-input gear box and the axial motor are connected in a matched mode through the inner spline and the spline shaft, tiny errors of the axial motor and the double-input gear box shaft can be made up, the maximum input torque of the motors is limited through shearing of the torque limiting shearing pin, and the torque limiting effect is good. And the double-input gear box is arranged in the middle of the axle in the middle, so that the damage probability of wheels can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail vehicle drive, in particular to an integrated drive assembly of a dual-motor and a gearbox. Background Technique

[0002] Rail vehicles are the main transportation tools for construction departments such as railway equipment maintenance, overhaul, and infrastructure construction. The power system of rail vehicles is used to provide the power source required by rail vehicles.

[0003] The existing rail vehicle power system consists of a traditional three-piece set of a motor, a coupling, and a gearbox. The motor uses a high-power motor with a power of 160KW to 600kw. The motor is a conventional radial motor. The weights of motors with different powers are all above 500 Kg. The weight of the motor directly acts on the bogie frame. This weight, as an inter-spring weight, has a direct impact on the dynamic performance of the vehicle. At the same time, the currently used coupling is generally a drum-shaped tooth coupling, which requires regular maintenance and has a relatively high failure rate, increasing the maintenance cost. The gearbox generally uses a one-stage or two-stage reducer with parallel-axis transmission. Due to the motor size limitation, the position of the gearbox on the axle cannot be arranged in the center, and the gearbox is biased towards one wheel. This results in a relatively large difference in wheel weights between the two wheels of the same wheel set of the motorized bogie, causing different degrees of wheel wear and affecting the dynamic performance of the vehicle. Content of the Utility Model

[0004] The purpose of the utility model is to provide an integrated drive assembly of a dual-motor and a gearbox to solve the problems proposed in the above background technique, that is, the large weight of the existing rail vehicle power system affects the performance, the used coupling needs to be maintained multiple times, increasing the use cost, and the gearbox cannot be arranged in the center, resulting in damage to the wheels and affecting the actual use.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is an integrated drive assembly of a dual-motor and a gearbox, including:

[0007] A dual-input gearbox;

[0008] A slip bushing is embedded inside the end input shaft of the dual-input gearbox, and a torque-limiting shear pin is relatively fixedly connected to one side of the outer surface of the slip bushing. Internal splines are equidistantly arranged on the inner wall of the slip bushing. A set of axial motors are symmetrically arranged on the outer side of the input shaft of the dual-input gearbox, and a spline shaft is fixedly connected to one end of the output shaft of the axial motor. The spline shaft and the internal splines are fixedly connected and matched.

[0009] Furthermore, a second connection flange is fixedly connected to the end of the dual-input gearbox. The axial motor housing is fixedly provided with a first connection flange relative to the second connection flange, and the screw holes of the first connection flange and the second connection flange correspond to each other.

[0010] Furthermore, an axle is arranged below one side of the dual-input gearbox, and an internal large gear in the dual-input gearbox is in interference fit with the middle part of the axle.

[0011] Furthermore, a wheel is fixedly connected to the end of the axle.

[0012] Furthermore, a suspension rod is fixedly connected to one end of the outer surface of the dual-input gearbox, and the suspension rod is suspended on an external frame.

[0013] Furthermore, the suspension rod includes a rod body and a rubber ball joint;

[0014] A set of symmetric rubber ball joints are fixedly connected to the upper end of the rod body.

[0015] Compared with the prior art, the advantages of the present utility model are as follows:

[0016] In the present utility model, the axial motor used is an axial disc motor, and the motor is a permanent magnet water-cooled motor, which is relatively light in weight compared with traditional motors. And it is arranged bidirectionally, and the two motors can work together or separately. When a large starting acceleration is required during vehicle startup, the two motors can work together to obtain strong starting acceleration ability. When the vehicle is cruising at high speed, the two motors can work alternately to reduce the energy consumption of the vehicle and at the same time reduce the wear of the motors. By the combined work of the two motors under different working conditions, the rail vehicle can find the best solutions in both driving performance and energy saving. And the gearbox is arranged with dual input shafts and is connected to the axial motor by internal splines and spline shafts, which can make up for the small errors between the motor and the gearbox shaft, and can limit the maximum input torque of the motor by cutting the torque-limiting shear pin on the slip bushing to protect the gearbox. And the dual-input gearbox is centrally arranged in the middle of the axle, which can reduce the probability of wheel damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is the external view of the present utility model;

[0019] Figure 2 is the cross-sectional view of the present utility model;

[0020] Figure 3 Schematic diagram of the suspension rod structure of the present utility model;

[0021] Figure 4 Installation position diagram of the second connecting flange of the present utility model;

[0022] Figure 5 Schematic diagram of the sliding bushing of the present utility model;

[0023] Figure 6 Schematic diagram of the axial motor of the present utility model.

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] 1. Axial motor; 11. Spline shaft; 12. First connecting flange; 2. Double-input gearbox; 21. Sliding bushing; 22. Second connecting flange; 211. Internal spline; 212. Torque-limiting shear pin; 3. Suspension rod; 31. Rubber ball joint; 32. Rod body; 4. Axle; 5. Wheel. Detailed implementation manners

[0026] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model in conjunction with the drawings.

[0027] In the following description, many specific details are set forth to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementation manners disclosed below.

[0028] To make the purpose, technical solution, and advantages of the present utility model clearer, the following will further describe the implementation manners of the present utility model in detail in conjunction with the drawings.

[0029] Please refer to Figures 1-6 As shown, this embodiment is an integrated drive assembly of a dual motor and a gearbox, including:

[0030] Double-input gearbox 2;

[0031] The double-input gearbox 2 is used to transmit the power source to the axle 4 to meet the position movement of the wheel 5.

[0032] A slip bushing 21 is embedded inside the input shaft at the end of the double-input gearbox 2. One side of the outer surface of the slip bushing 21 is fixedly connected with a torque-limiting shear pin 212. Internal splines 211 are arranged equidistantly on the inner wall of the slip bushing 21. A set of symmetrical axial motors 1 are arranged on the outer side of the input shaft of the double-input gearbox 2. One end of the output shaft of the axial motor 1 is fixedly connected with a spline shaft 11. The spline shaft 11 and the internal splines 211 are fixedly connected and matched with each other;

[0033] The slip bushing 21 satisfies the arrangement of the torque-limiting shear pin 212 and the internal splines 211. The internal splines 211 cooperating with the spline shaft 11 can satisfy the connection between the axial motor 1 and the double-input gearbox 2. And this kind of cooperation method can make up for the small errors of the shafts of the axial motor 1 and the double-input gearbox 2. The axial motor 1 is the power source;

[0034] A second connection flange 22 is fixedly connected to the end of the double-input gearbox 2. A first connection flange 12 is fixedly arranged on the outer shell of the axial motor 1 opposite to the second connection flange 22. And the screw holes of the first connection flange 12 and the second connection flange 22 correspond to each other;

[0035] The first connection flange 12 and the second connection flange 22 use external bolts in cooperation with the screw holes. After being tightened, the outer shell of the axial motor 1 and the double-input gearbox 2 can be connected and fixed;

[0036] An axle 4 is arranged below one side of the double-input gearbox 2. And the large gear inside the double-input gearbox 2 is in interference fit with the middle part of the axle 4;

[0037] One end of the axle 4 is fixedly connected with a wheel 5;

[0038] The interference fit between the axle 4 and the internal gear of the double-input gearbox 2 is used to transmit power to the wheel 5. The wheel 5 can move in position by cooperating with the track after being stressed;

[0039] A suspension rod 3 is fixedly connected to one end of the outer surface of the double-input gearbox 2. And the suspension rod 3 is suspended on the external frame;

[0040] The suspension rod 3 includes a rod body 32 and a rubber ball joint 31;

[0041] A set of symmetrical rubber ball joints 31 are fixedly connected to the upper end of the rod body 32;

[0042] The rod body 32 installs the structure of the rubber ball joint 31. By using the connection between the rubber ball joint 31 and the external frame, the installation and displacement of the structure of the double-input gearbox 2 can be carried out;

[0043] Working principle: After the double-input gearbox 2 is structurally fixed by means of the suspension rod 3, the first connecting flange 12 and the second connecting flange 22 are arranged in relative contact, and bolts are placed into the corresponding screw holes of the two. After tightening, the structure between the two can be fixed, thereby fixing the double-input gearbox 2 and the axial motor 1;

[0044] Before fixing the double-input gearbox 2 and the axial motor 1, the output shaft of the axial motor 1 is fixed to the input shaft of the double-input gearbox 2 by the fixed connection between the internal spline 211 and the spline shaft 11;

[0045] Then, a press fit connection is adopted between the axle 4 and the wheel 5, and a press fit connection is adopted between the axle 4 and the internal gear of the double-input gearbox 2. The axial motors 1 are symmetrically arranged in a group. During use, the two motors can work together or separately. When a large starting acceleration is required during vehicle startup, the two motors can work together to obtain strong starting acceleration ability. When the vehicle is cruising at high speed, the two motors can work alternately;

[0046] In this solution, the arrangement of the two motors can reduce the energy consumption of the vehicle and at the same time reduce the wear of the motors. Moreover, the double-input gearbox 2 is arranged with double input shafts and is connected to the axial motor 1 by means of the internal spline 211 and the spline shaft 11, which can compensate for the small errors of the shafts of the axial motor 1 and the double-input gearbox 2, and the maximum input torque of the motor can be limited by the shearing of the torque-limiting shear pin 212 on the sliding bushing 21 to protect the double-input gearbox 2. The double-input gearbox 2 is centrally arranged in the middle of the axle 4, which can reduce the probability of damage to the wheel 5.

[0047] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "linked" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. An integrated drive assembly of a dual motor and a gearbox, characterized in that, Comprising: A double-input gearbox (2); A slip bushing (21) is embedded inside the input shaft at the end of the double-input gearbox (2), and a torque-limiting shear pin (212) is fixedly connected to one side of the outer surface of the slip bushing (21). Internal splines (211) are equidistantly arranged on the inner wall of the slip bushing (21). A set of axial motors (1) are symmetrically arranged on the outer side of the input shaft of the double-input gearbox (2), and a spline shaft (11) is fixedly connected to one end of the output shaft of the axial motor (1). The spline shaft (11) and the internal splines (211) are fixedly connected and matched.

2. The integrated drive assembly of a dual motor and a gearbox according to claim 1, characterized in that, A second connection flange (22) is fixedly connected to the end of the double-input gearbox (2). A first connection flange (12) is fixedly provided on the outer shell of the axial motor (1) relative to the second connection flange (22), and the screw holes of the first connection flange (12) and the second connection flange (22) correspond to each other.

3. The integrated drive assembly of a dual motor and a gearbox according to claim 1, wherein An axle (4) is arranged below one side of the double-input gearbox (2), and the large gear inside the double-input gearbox (2) is in interference fit with the middle part of the axle (4).

4. The integrated drive assembly of a dual motor and a gearbox according to claim 3, wherein A wheel (5) is fixedly connected to the end of the axle (4).

5. The integrated drive assembly of a dual motor and a gearbox according to claim 1, wherein, A suspension rod (3) is fixedly connected to one end of the outer surface of the double-input gearbox (2), and the suspension rod (3) is suspended on an external frame.

6. The integrated drive assembly of a dual motor and a gearbox according to claim 5, characterized in that, The suspension rod (3) comprises a rod body (32) and a rubber ball joint (31); A set of rubber ball joints (31) are symmetrically fixedly connected to the upper end of the rod body (32).

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