CN212373597U

CN212373597U - Spring steel wire flexible shaft for driving electric bicycle

Info

Publication number: CN212373597U
Application number: CN201920840744.2U
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2021-01-19
Anticipated expiration: 2029-06-05

Abstract

The utility model provides a structure that is used for electric bicycle driven spring steel wire flexible shaft is disclosed to a utility model patent specification, its characterized in that: one end of a spring steel wire with the diameter less than 6 mm and the length less than 1500 mm is connected with a motor through a fastening shaft sleeve to form a power input end; the other end is connected with the driving shaft through a connecting shaft sleeve to form a power output end. This constitutes a spring wire flexible shaft for an electric bicycle drive. With this arrangement, a spring wire for a spring wire flexible shaft for an electric bicycle drive transmits power output from a motor to a drive shaft.

Description

Spring steel wire flexible shaft for driving electric bicycle

Technical Field

The utility model provides a spring steel wire flexible shaft for electric bicycle driven belongs to vehicle technical field, relates to an electric bicycle actuating system's transmission spare part.

Background

The electric bicycle is currently used as a short-distance travel tool by urban and rural residents in China, a driving system of the conventional electric bicycle is that a driving wheel (rear wheel) and a motor are combined into a whole, a main shaft of the motor is a wheel shaft of the driving wheel, and a rotating body of the motor is a wheel hub of the driving wheel. The driving system has the advantages of simple structure, reliable use and the like, but the driving performance is poor. The rolling resistance of the driving wheel directly acts on the rotor of the motor during riding, when the vehicle runs at high speed, the large current of the storage battery is discharged, and most of the electric energy is converted into heat energy due to the low energy conversion efficiency of the motor, so that the temperature of the motor is increased. When the vehicle is started or accelerated, the storage battery is discharged by overlarge current, and impact damage is caused to the storage battery. Due to the defects, the conventional electric bicycle has short endurance mileage and short service life of the storage battery. Therefore, there is a need to develop a more efficient driving system for an electric bicycle, in which the flexible shaft is an important transmission component, so as to improve the driving range of the electric bicycle and the service life of the battery.

Disclosure of Invention

The utility model discloses the flexible axle of spring wire is shown in figure 1. In fig. 1: piece 1 is the coupling axle sleeve, piece 2 is the flexible shaft, piece 3 is holding screw, piece 4 is the holding axle sleeve, and piece 5 is motor left end lid end shaft.

The flexible shaft (shown as element 2) is a spring wire with a diameter of less than 6 mm and a length less than the overall length of the electric bicycle profile, which is typically about 1500 mm, so that the spring wire used as the flexible shaft has a length of less than 1500 mm.

Connection structure of flexible shaft power input end: one end (power input end) of a spring steel wire used as a flexible shaft is inserted into a central hole of an end shaft on a left end cover of the motor, the unilateral clearance between the hole wall and the outer circle surface of the spring steel wire is less than 0.1 mm, a through hole is arranged on the end shaft (shown as a piece 5), and the central line of the hole is vertically intersected with the axis of the central hole of the end shaft. The outer circle surface of the end shaft is provided with a fastening shaft sleeve (shown as a piece 4), the fastening shaft sleeve is provided with a threaded through hole, the central line of the threaded hole is vertically intersected with the axis of the central hole of the end shaft, and a fastening screw (shown as a piece 3) applies extrusion force to a spring steel wire in the central hole of the end shaft through the threaded hole in the fastening shaft sleeve and fastens the spring steel wire in the central hole of the end shaft.

The connection structure of the flexible shaft power output end is as follows: the other end (power take-off) of the spring wire, which acts as a flexible shaft, is inserted into the central hole in the end of the coupling sleeve (element 1) and is fastened to the end face of the coupling sleeve by welding, and on the inner hole wall of the inlet end of the coupling sleeve there is a section of internal thread for adjusting the tightness of the spring wire and transmitting the power to the drive shaft through this section of thread.

Drawings

Fig. 1 is a structural view of a spring wire flexible shaft for an electric bicycle drive.

Detailed Description

As shown in fig. 1, a power input end of a spring wire (shown as a member 2) serving as a flexible shaft is inserted into a center hole of an end shaft (shown as a member 5) on a left end cover of a motor, a through hole perpendicular to the center hole of the end shaft is formed in the end shaft (shown as a member 5), a fastening shaft sleeve (shown as a member 4) is arranged on the outer circumferential surface of the end shaft, a threaded through hole perpendicular to the center hole of the end shaft is formed in the fastening shaft sleeve, and a fastening screw (shown as a member 3) applies an extrusion force to the spring wire in the center hole of the end shaft through the threaded hole in the fastening shaft sleeve and fastens the spring wire in the center hole of.

As shown in fig. 1, the power output end of the spring wire (member 2) serving as the flexible shaft is inserted into the central hole of the end of the coupling sleeve (member 1), and the spring wire is fastened to the end face of the coupling sleeve by welding, and a section of internal thread for adjusting the tightness of the spring wire is provided on the inner hole wall of the inlet end of the coupling sleeve and the power is transmitted to the drive shaft through the section of thread.

Through the setting, the utility model discloses can realize its transmission function with the power transmission to the drive shaft of motor output.

Claims

1. A spring wire flexible shaft for electric bicycle drive characterized in that: one end of a spring steel wire with the diameter less than 6 mm and the length less than 1500 mm is connected with the end shaft of the left end cover of the motor through a fastening shaft sleeve and a fastening screw to form a power input end; the other end is connected with the driving shaft through a connecting shaft sleeve and a welding method to form a power output end.

2. A spring wire flexible shaft for an electric bicycle drive as defined in claim 1, wherein: the spring steel wire at the power input end of the spring steel wire flexible shaft for driving the electric bicycle is fastened in the central hole of the end shaft of the left end cover of the motor through the pressing force applied to the spring steel wire by the fastening shaft sleeve and the fastening screw; a spring steel wire for the power output end of a flexible shaft of spring steel wire for driving an electric bicycle is inserted into a central hole at the end of a coupling sleeve, and the spring steel wire is fastened to the end surface of the coupling sleeve by welding.

3. A spring wire flexible shaft for an electric bicycle drive as defined in claim 2, wherein: a section of internal thread is arranged on the inner hole wall of the inlet end of a connecting shaft sleeve of a power output end of a spring steel wire flexible shaft driven by an electric bicycle and used for adjusting the tightness of the spring steel wire, and the power is transmitted to a driving shaft through the section of internal thread.