High-precision torque sensor mounting structure of centrally-mounted motor

Abstract

The high-precision torque sensor mounting structure comprises a motor cover, a machine body shell, a wire outlet panel, a controller, an elastic body, a torque sensor, a magnetic ring, a magnetic ring support, a single motor, a middle shaft, a transmission mechanism, a machine shell cover and a bearing. When the center coaxial motor is used, the crank transmits treading torque to the center shaft, the torque is transmitted to the bearing through the center shaft and then transmitted to the elastic body, the elastic body is slightly deformed, the torque sensor collects the torque, compared with an existing torque collecting device, the center coaxial motor uses smaller axial space, and the center coaxial motor is compact in structure and convenient to operate. The installation mode is more applicable, meanwhile, higher transmission precision is achieved, various complex processes such as traditional coil winding are avoided, and the manufacturing process is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of mid-mounted motors, and in particular to a high-precision torque sensor installation structure for a mid-mounted motor. Background Art

[0002] The mid-mounted motor has a more reasonable center of gravity distribution than traditional front-wheel drive and rear-wheel drive motors. Combined with the two-stage transmission and high transmission ratio, it ensures the high efficiency of the motor while multiplying the speed through the rear flywheel. The power is far superior to traditional electric vehicles. Electric-assisted bicycles with high-performance mid-mounted motor systems are beginning to become a major trend, making long-distance riding easier and easier to climb difficult steep slopes.

[0003] In traditional front-wheel drive or rear-wheel drive electric bicycles, the center axle torque sensor is mounted on the center axle. The torque sensor is a core component of the electric bicycle. It senses and measures the rider's riding torque, providing a basis for determining the power output of the electric drive unit. As a component that senses the rider's intention, the performance of the torque sensor is crucial.

[0004] At present, in order to ensure that the vehicle moves when the person moves in the power-assisted mode, the central motor system must first pedal.

[0005] The motor provides power, better control, a stronger riding feel, no sense of frustration, smooth riding and smooth acceleration, and a torque sensor is essential. However, the current center shaft torque sensor.

[0006] In the existing technology, people stepping on the spindle creates pressure, causing it to tilt at a certain angle. The torque sensor detects torque through the deformation and tilt angle of the spindle. However, the traditional spindle is directly connected to the motor using bearings, and the spindle tilt angle is not obvious, resulting in low torque detection data accuracy.

[0007] Therefore, how to provide a high-precision torque sensor installation structure for a mid-mounted motor to solve the problems existing in the prior art is of great significance to its application. Utility Model Content

[0008] In view of this, the purpose of this application is to provide a high-precision torque sensor installation structure for a mid-mounted motor to solve the problem.

[0009] To achieve the above objectives, the present invention provides the following technical solutions:

[0010] A high-precision torque sensor mounting structure for a mid-mounted motor includes a motor cover, a body shell, a wire outlet panel, a controller, an elastic body, a torque sensor, a magnetic ring, a magnetic ring bracket, a single motor, a central shaft, a transmission mechanism, a housing cover, and a bearing;

[0011] Among them, the elastomer is rotatably connected to the central axis through a bearing, the torque sensor is installed on one side of the elastomer, the other side of the elastomer is in contact with the inner wall of the body shell, the motor cover is installed on one side of the body shell, the controller is installed inside the body shell, and the outlet panel is installed on the top of the body shell.

[0012] Preferably, the magnetic ring is installed in the middle of the central axis through a magnetic ring bracket, the single motor is installed inside the body shell, and the output end of the single motor is connected to the central axis through a transmission mechanism.

[0013] Preferably, the housing cover is installed on the other side of the body shell, and a waterproof gasket is provided between the connecting end surface of the motor cover and the body shell.

[0014] Preferably, the output end of the torque sensor is electrically connected to the controller.

[0015] Preferably, the shape of the elastic body is a cross, the shape of the torque sensor is adapted to the elastic body, and a cross mounting groove adapted to the elastic body is provided on the inner side of the body shell.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] When the utility model is in use, the crank transmits the pedaling torque to the middle shaft, and the torque is transmitted to the bearing through the middle shaft, and then to the elastomer, causing the elastomer to undergo micro-deformation, and the torque sensor collects the torque. Compared with the existing torque collection device, the utility model uses a smaller axial space, and the central coaxial motor has a compact structure. This installation method is more applicable and has higher transmission accuracy. It also avoids multiple complex processes such as traditional coil winding, and the manufacturing process is simpler.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiment of the present application in conjunction with the accompanying drawings.

[0019] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without inventive work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 For the explosion of the utility model.

[0023] In the figure: 1. Motor cover; 2. Machine body shell; 3. Wire outlet panel; 4. Controller; 5. Waterproof gasket; 6. Elastomer; 7. Torque sensor; 8. Magnetic ring; 9. Magnetic ring bracket; 10. Single motor; 11. Middle shaft; 12. Transmission mechanism; 13. Machine housing cover; 14. Bearing. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions 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 of the embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted in the embodiments.

[0025] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0027] It should also be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprises," or any other variations thereof are intended to cover non-exclusive inclusion.

[0028] See also Figure 1-2 The present invention provides a technical solution for a high-precision torque sensor mounting structure for a mid-mounted motor: a high-precision torque sensor mounting structure for a mid-mounted motor, comprising a motor cover 1, a body shell 2, a wire outlet panel 3, a controller 4, an elastic body 6, a torque sensor 7, a magnetic ring 8, a magnetic ring bracket 9, a single motor 10, a central shaft 11, a transmission mechanism 12, a housing cover 13, and a bearing 14;

[0029] Among them, the elastomer 6 is rotatably connected to the central shaft 11 through a bearing 14, the torque sensor 7 is installed on one side of the elastomer 6, the other side of the elastomer 6 is in contact with the inner wall of the body shell 2, the motor cover 1 is installed on one side of the body shell 2, the controller 4 is installed inside the body shell 2, and the outlet panel 3 is installed on the top of the body shell 2.

[0030] The magnetic ring 8 is installed in the middle of the central shaft 11 through the magnetic ring bracket 9. The magnetic ring 8 is used to collect torque. The single motor 10 is installed inside the body shell 2. The output end of the single motor 10 is connected to the central shaft 11 through the transmission mechanism 12.

[0031] The housing cover 13 is installed on the other side of the body shell 2. A waterproof gasket 5 is provided between the connecting end surfaces of the motor cover 1 and the body shell 2 to improve the waterproof performance of the device.

[0032] The output end of the torque sensor 7 is electrically connected to the controller 4 , and the wire outlet panel 3 is installed on the top of the body shell 2 for threading wires.

[0033] The elastic body 6 is in a cross shape, and the torque sensor 7 is in a shape that matches the elastic body 6 . A cross mounting groove that matches the elastic body 6 is provided on the inner side of the housing 2 .

[0034] During specific use, the crank transmits the pedaling torque to the middle shaft 11, and the torque is transmitted to the bearing 14 through the middle shaft 11, and then transmitted to the elastomer 6, causing the elastomer 6 to undergo micro-deformation, and the torque sensor 7 collects the torque. Compared with the existing torque collection device, the utility model uses a smaller axial space, and the central coaxial motor has a compact structure. This installation method is more applicable and has higher transmission accuracy. It also avoids various complex processes such as traditional coil winding, and the manufacturing process is simpler.

[0035] The above description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Those skilled in the art will appreciate that the present invention is susceptible to various modifications and variations. Any variation, modification, replacement, integration, or parameter change to these embodiments, which falls within the spirit and principles of the present invention and achieves the same functionality through conventional substitutions, without departing from the principles and spirit of the present invention, falls within the scope of protection of the present invention.

Claims

1. A high-precision torque sensor mounting structure for a mid-mounted motor, characterized by: It comprises a motor cover (1), a body shell (2), an outlet panel (3), a controller (4), an elastic body (6), a torque sensor (7), a magnetic ring (8), a magnetic ring bracket (9), a single motor (10), a central shaft (11), a transmission mechanism (12), a shell cover (13), and a bearing (14); The elastic body (6) is rotatably connected to the central shaft (11) via a bearing (14), the torque sensor (7) is mounted on one side of the elastic body (6), the other side of the elastic body (6) is in contact with the inner wall of the machine shell (2), the motor cover (1) is mounted on one side of the machine shell (2), the controller (4) is mounted inside the machine shell (2), and the outlet panel (3) is mounted on the top of the machine shell (2).

2. The high-precision torque sensor mounting structure for a mid-mounted motor according to claim 1, characterized in that: The magnetic ring (8) is installed in the middle of the central shaft (11) through a magnetic ring bracket (9), the single motor (10) is installed inside the body shell (2), and the output end of the single motor (10) is connected to the central shaft (11) through a transmission mechanism (12).

3. The high-precision torque sensor mounting structure for a mid-mounted motor according to claim 2, wherein: The housing cover (13) is installed on the other side of the body shell (2), and a waterproof gasket (5) is provided between the connecting end surfaces of the motor cover (1) and the body shell (2).

4. The high-precision torque sensor mounting structure for a mid-mounted motor according to claim 3, characterized in that: The output end of the torque sensor (7) is electrically connected to the controller (4).

5. The high-precision torque sensor mounting structure for a mid-mounted motor according to claim 3, characterized in that: The elastic body (6) is in a cross shape, the torque sensor (7) is in a shape that matches the elastic body (6), and a cross mounting groove that matches the elastic body (6) is provided on the inner side of the body shell (2).

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