Bilateral moment center shaft of power-assisted electric vehicle

Abstract

The utility model discloses a power-assisted electric vehicle bilateral moment center shaft which comprises a shaft body and a strain gauge base, the joint of the strain gauge base and the shaft body is located at the 1 / 2 position of the length of the shaft body, the shaft body and the strain gauge base are integrally machined and formed, and the area between the shaft body and the strain gauge base is machined through a machining center. The hollow cavity is formed, so that the shaft body and the strain gauge base are integrally formed, an original split structure between the strain gauge base and the shaft body is changed into an integrated structure, the precision and strength between the strain gauge base and the shaft body are improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power-assisted electric vehicle accessories, in particular to a bilateral torque center shaft of a power-assisted electric vehicle. Background Art

[0002] An electric-assisted bicycle is a bicycle that combines human and electric power. This type of bicycle is similar in shape and structure to a traditional bicycle, with pedals, but it is equipped with batteries, motors and other devices inside to provide assistance to the user through electricity, making riding easier and less labor-intensive.

[0003] The center shaft of an electric-assisted bicycle is used to mount the pedals, and a strain gauge base is provided on the periphery of the center shaft. Traditionally, the strain gauge base is sleeved on the periphery of the center shaft and connected to the center shaft by welding. However, after a long period of operation, the connection between the strain gauge base and the center shaft connected by welding will crack and deform. This connection method makes it difficult to ensure the accuracy and strength of the connection.

[0004] Therefore, how to provide a bilateral torque center shaft for power-assisted electric vehicles and improve the accuracy and strength of the connection between the strain gauge base and the center shaft is a technical problem that technicians in this field urgently need to solve. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a bilateral torque center shaft for power-assisted electric vehicles, which solves the problem that the traditional strain gauge base is sleeved on the outer periphery of the center shaft and the strain gauge base is connected to the center shaft by welding. After the center shaft has been working for a long time, the connection between the strain gauge base and the center shaft connected by welding will crack and deform.

[0006] In order to solve the above technical problems, the present invention adopts a technical solution: a bilateral torque center shaft of an electric power-assisted vehicle, the center shaft comprising:

[0007] The shaft body and the strain gauge base are integrally formed. The connection between the strain gauge base and the shaft body is located at 1 / 2 of the length of the shaft body.

[0008] Preferably, the strain gauge base includes a connecting ring and a mounting seat, one side of the mounting seat is connected to the outer periphery of the connecting ring, and the outer periphery of the mounting seat is provided with a mounting groove.

[0009] Preferably, a plurality of assembly grooves are provided on a side of the mounting seat away from the connecting ring, and the assembly grooves are evenly distributed on one side of the mounting seat.

[0010] Preferably, a plurality of assembly parts are respectively provided at both ends of the shaft body, and the plurality of assembly parts are evenly distributed on the periphery of the end portion of the shaft body.

[0011] Preferably, threaded holes are provided at both ends of the shaft body, and the threaded holes are also provided with a first chamfer.

[0012] Preferably, a second chamfer is provided at the connection between the shaft and the strain gauge.

[0013] The beneficial effects of the utility model are as follows:

[0014] The area between the shaft and the strain gauge base is processed by a machining center to form a hollow cavity, so that the shaft and the strain gauge base are formed into one piece. The original separate structure between the strain gauge base and the shaft is changed to an integrated structure, which improves the precision and strength between the strain gauge base and the shaft and reduces manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model Figure 1 ;

[0016] Figure 2 It is a schematic diagram of the cross-sectional view of the present invention;

[0017] Figure 3 yes Figure 2 Schematic cross-sectional view of .

[0018] The parts in the accompanying drawings are marked as follows:

[0019] 100, shaft; 101, assembly portion; 102, threaded hole; 103, first chamfer;

[0020] 200, strain gauge base; 201, connecting ring; 202, mounting seat; 203, mounting groove; 204, assembly groove; 205, second chamfer. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0022] Example: Refer to Figure 1-Figure 3 As shown, a bilateral torque center shaft of an electric power-assisted vehicle comprises:

[0023] The shaft 100 and the strain gauge base 200, the connection between the strain gauge base 200 and the shaft 100 is located at 1 / 2 of the length of the shaft 100, such as Figure 3 As shown, L1 = L2, and the shaft 100 and the strain gauge base 200 are integrally formed.

[0024] The area between the shaft body 100 and the strain gauge base 200 is processed by a machining center to form a hollow cavity, so that the shaft body 100 and the strain gauge base 200 are integrally formed. The original separate structure between the strain gauge base 200 and the shaft body 100 is changed to an integrated structure, thereby improving the precision and strength of the strain gauge base 200 and the shaft body 100 and reducing manufacturing costs.

[0025] Specifically, the strain gauge base 200 includes a connecting ring 201 and a mounting seat 202 . One side of the mounting seat 202 is connected to the outer periphery of the connecting ring 201 , and a mounting groove 203 is provided on the outer periphery of the mounting seat 202 .

[0026] A plurality of assembly grooves 204 are provided on a side of the mounting seat 202 away from the connecting ring 201 . The assembly grooves 204 are evenly distributed on one side of the mounting seat 202 .

[0027] In addition, a plurality of assembly parts 101 are respectively provided at both ends of the shaft body 100 . The plurality of assembly parts 101 are evenly distributed on the outer periphery of the ends of the shaft body 100 . The plurality of assembly parts 101 are used for assembling pedals.

[0028] Threaded holes 102 are provided at both ends of the shaft body 100 . The threaded holes 102 are also provided with first chamfers 103 for fixing the pedals by bolts.

[0029] It should be noted that a second chamfer 205 is provided at the connection between the shaft body 100 and the strain gauge to improve the connection strength between the strain gauge base 200 and the shaft body 100 .

[0030] The working principle of the present invention is as follows:

[0031] The area between the shaft body 100 and the strain gauge base 200 is processed by a machining center to form a hollow cavity, so that the shaft body 100 and the strain gauge base 200 are integrally formed. The original separate structure between the strain gauge base 200 and the shaft body 100 is changed to an integrated structure, thereby improving the precision and strength of the strain gauge base 200 and the shaft body 100 and reducing manufacturing costs.

[0032] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the descriptions in the embodiments and shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present utility model.

[0033] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A bilateral torque center shaft for an electric power-assisted vehicle, characterized in that: The axle includes: The shaft body and the strain gauge base are integrally formed. The connection between the strain gauge base and the shaft body is located at 1 / 2 of the length of the shaft body.

2. The bilateral torque center shaft of an electric power-assisted vehicle according to claim 1, characterized in that: The strain gauge base includes a connecting ring and a mounting seat. One side of the mounting seat is connected to the outer periphery of the connecting ring, and the outer periphery of the mounting seat is provided with a mounting groove.

3. The bilateral torque center shaft of an electric power-assisted vehicle according to claim 2, characterized in that: A plurality of assembly grooves are provided on one side of the mounting seat away from the connecting ring, and the assembly grooves are evenly distributed on one side of the mounting seat.

4. The bilateral torque center shaft of an electric power-assisted vehicle according to claim 3, characterized in that: A plurality of assembly parts are respectively provided at both ends of the shaft body, and the plurality of assembly parts are evenly distributed on the outer periphery of the end portion of the shaft body.

5. The bilateral torque center shaft of an electric power-assisted vehicle according to claim 4, characterized in that: Threaded holes are provided at both ends of the shaft body, and the threaded holes are also provided with first chamfers.

6. The bilateral torque center shaft of an electric power-assisted vehicle according to claim 5, characterized in that: A second chamfer is provided at the connection between the shaft body and the strain gauge.

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