Mounting structure for torque sensor of centrally-mounted motor

Abstract

The utility model discloses a centrally-mounted motor torque sensor mounting structure, which comprises a centrally-mounted motor shell, mounting screw holes, shell positioning bulges, a torque sensor rotating end, a flange hole, a mounting flange, a positioning groove, mounting bolts, a torque sensor body, a motor end cover, end cover positioning bulges, end cover mounting holes, a main shaft and a sealing bearing. The installation flange is arranged on the torque sensor body, the flange hole in the installation flange corresponds to the installation screw hole in the middle motor shell, and when the torque sensor is installed, the shell positioning protrusion and the end cover positioning protrusion correspond to the positioning grooves in the installation flange respectively. According to the utility model, the installation of the torque sensor is realized by using the installation bolt to pass through the end cover installation hole and the flange hole in sequence and then to be fixed in the installation screw hole, and compared with the existing installation by adopting a threaded connection mode, the installation angle of the sensor does not need to be considered, and the installation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of torque sensor technology, specifically to a mounting structure for a mid-mounted motor torque sensor. Background Technology

[0002] A mid-drive motor torque sensor is installed between the bottom bracket and the output shaft of an e-bike to measure the transmitted torque. It uses strain gauges to detect minute deformations on the bottom bracket surface, thus obtaining the torque value. The sensor boasts high measurement accuracy and can quickly and accurately measure and transmit torque data to the motor controller in different riding modes, such as manual or electric assist, to control the motor's output of appropriate power. The accuracy of the torque sensor is crucial for providing a smooth and natural riding experience, avoiding the discomfort caused by inaccurate measurements from traditional pedal sensors.

[0003] Traditionally, the torque sensor for a mid-drive motor is mounted on the motor housing, with the rotating part of the sensor fixed to the central shaft of the motor. The current method is to use a threaded connection, but this installation method requires precise positioning of the sensor. If the installation angle is incorrect, it will affect the accuracy of the sensor, making the installation difficult.

[0004] Therefore, it is of great significance to provide a mid-mounted motor torque sensor mounting structure to solve the problems existing in the current technology. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a mounting structure for a mid-mounted motor torque sensor, in order to solve the problem that the existing method is to use a threaded connection, but this mounting method requires precise positioning of the sensor, and if the installation angle is incorrect, it will affect the accuracy of the sensor, and the installation is difficult.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A mounting structure for a mid-mounted motor torque sensor includes a mid-mounted motor housing, mounting screw holes, housing positioning protrusions, a torque sensor rotating end, flange holes, mounting flanges, positioning grooves, mounting bolts, a torque sensor body, a motor end cover, end cover positioning protrusions, end cover mounting holes, a main shaft, and a sealed bearing.

[0008] The end face of the central motor housing is provided with mounting screw holes. The rotating end of the torque sensor is rotatably connected to the torque sensor body. The mounting flange is fixedly connected to the torque sensor body. The surface of the mounting flange is provided with flange holes. The surface of the motor end cover is provided with end cover mounting holes. The mounting bolt passes through the end cover mounting holes and flange holes and is threaded into the mounting screw holes.

[0009] Preferably, the front of the central motor housing is provided with a housing positioning protrusion, the front and back of the mounting flange are provided with positioning grooves, the back of the motor end cover is provided with an end cover positioning protrusion, the housing positioning protrusion is adapted to the positioning groove on the back of the mounting flange, and the end cover positioning protrusion is adapted to the positioning groove on the front of the torque sensor body.

[0010] Preferably, the interior of the rotating end of the torque sensor is a hollow cavity, and a pin groove is provided inside the cavity. A positioning pin is provided on the surface of the main shaft, and the positioning pin is engaged with the pin groove.

[0011] Preferably, the rotating end of the torque sensor is rotatably connected to the motor end cover via a sealed bearing.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention features a mounting flange on the torque sensor body. The flange holes on the mounting flange correspond to the mounting screw holes on the central motor housing. When installing the torque sensor, the positioning protrusions on the housing and the end cap are aligned with the positioning grooves on the mounting flange. Then, mounting bolts are passed through the end cap mounting holes and the flange holes in sequence and fixed in place with the mounting screw holes, thus achieving the installation of the torque sensor. Compared with the existing threaded connection method, this invention does not require consideration of the sensor's installation angle, making installation more convenient.

[0014] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0015] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. 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 to scale.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the torque sensor in this utility model.

[0019] In the diagram: 1. Central motor housing; 2. Mounting screw hole; 3. Housing positioning protrusion; 4. Torque sensor rotating end; 5. Flange hole; 6. Mounting flange; 7. Positioning groove; 8. Mounting bolt; 9. Torque sensor body; 10. Motor end cover; 11. End cover positioning protrusion; 12. End cover mounting hole; 13. Main shaft; 14. Sealed bearing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0021] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0022] In this article, the term "and / or" is merely a description of the relationship between related 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 simultaneously. The term " / and" in this article describes another type of relationship between related objects, 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 related objects before and after it are in an "or" relationship.

[0023] 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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0024] Please see Figure 1-2This utility model provides a technical solution for the installation structure of a mid-mounted motor torque sensor: including a mid-mounted motor housing 1, mounting screw holes 2, housing positioning protrusions 3, torque sensor rotating end 4, flange holes 5, mounting flanges 6, positioning grooves 7, mounting bolts 8, torque sensor body 9, motor end cover 10, end cover positioning protrusions 11, end cover mounting holes 12, main shaft 13, and sealed bearing 14.

[0025] The end face of the central motor housing 1 is provided with mounting screw holes 2. The rotating end 4 of the torque sensor is rotatably connected to the torque sensor body 9. The mounting flange 6 is fixedly connected to the torque sensor body 9. The surface of the mounting flange 6 is provided with flange holes 5. The surface of the motor end cover 10 is provided with end cover mounting holes 12. The mounting bolt 8 passes through the end cover mounting holes 12 and flange holes 5 and is threadedly connected to the mounting screw holes 2.

[0026] The front of the central motor housing 1 is provided with a housing positioning protrusion 3, and the front and back of the mounting flange 6 are provided with positioning grooves 7. The back of the motor end cover 10 is provided with an end cover positioning protrusion 11. The housing positioning protrusion 3 is adapted to the positioning groove 7 on the back of the mounting flange 6, and the end cover positioning protrusion 11 is adapted to the positioning groove 7 on the front of the torque sensor body 9.

[0027] The inside of the rotating end 4 of the torque sensor is a hollow cavity with a pin groove. The surface of the main shaft 13 is provided with a positioning pin, which engages with the pin groove.

[0028] The torque sensor rotating end 4 is rotatably connected to the motor end cover 10 via a sealed bearing 14.

[0029] In practical use, when installing the torque sensor, the outer shell positioning protrusion 3 and the end cover positioning protrusion 11 are respectively aligned with the positioning groove 7 on the mounting flange 6. Then, the mounting bolt 8 is passed through the end cover mounting hole 12 and the flange hole 7 in sequence and fixed in the mounting screw hole 2, thereby realizing the installation of the torque sensor. Compared with the existing threaded connection installation method, this utility model does not need to consider the installation angle of the sensor, making it more convenient to install.

[0030] The above description is merely a preferred embodiment of this utility model and does not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A mounting structure for a mid-mounted motor torque sensor, characterized in that: Includes a central motor housing (1), mounting screw holes (2), housing positioning protrusions (3), torque sensor rotating end (4), flange holes (5), mounting flange (6), positioning grooves (7), mounting bolts (8), torque sensor body (9), motor end cover (10), end cover positioning protrusions (11), end cover mounting holes (12), main shaft (13), and sealed bearing (14); The end face of the central motor housing (1) is provided with mounting screw holes (2), the rotating end (4) of the torque sensor is rotatably connected to the torque sensor body (9), the mounting flange (6) is fixedly connected to the torque sensor body (9), the surface of the mounting flange (6) is provided with flange holes (5), the surface of the motor end cover (10) is provided with end cover mounting holes (12), and the mounting bolt (8) passes through the end cover mounting holes (12) and flange holes (5) and is threadedly connected to the mounting screw holes (2).

2. The mounting structure for a mid-mounted motor torque sensor as described in claim 1, characterized in that: The front of the central motor housing (1) is provided with a housing positioning protrusion (3), the front and back of the mounting flange (6) are provided with positioning grooves (7), the back of the motor end cover (10) is provided with an end cover positioning protrusion (11), the housing positioning protrusion (3) is adapted to the positioning groove (7) on the back of the mounting flange (6), and the end cover positioning protrusion (11) is adapted to the positioning groove (7) on the front of the torque sensor body (9).

3. The mounting structure for a mid-mounted motor torque sensor as described in claim 1, characterized in that: The inside of the rotating end (4) of the torque sensor is a hollow cavity, and a pin groove is provided inside the cavity. A positioning pin is provided on the surface of the main shaft (13), and the positioning pin is engaged with the pin groove.

4. The mounting structure for a mid-mounted motor torque sensor as described in claim 1, characterized in that: The torque sensor rotating end (4) is rotatably connected to the motor end cover (10) via a sealed bearing (14).

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