JPH03292278A - Swing arm for motor-operated scooter - Google Patents

Abstract

PURPOSE:To reduce weight through provision of a composite function by a method wherein a swing arm supporting a rear wheel in a cantilever manner forms a hollow casing with which the drive pulley of a motor, the pulley to be driven of a rear wheel, and a belt wound therearound are wholly covered. CONSTITUTION:In a motor-operated scooter, a drive pulley 5 of a motor 1 is coupled to a pulley 6 to be driven of a rear wheel 2 through a belt 3. The rear wheel 2 is supported by a swing arm having a fulcrum and mounted to a subtube with which a car body is formed. In this case, the arm part of the swing arm forms a single hollow casing 4 with which the drive pulley 5, the rear wheel 2, the pulley 6 to be driven, and the belt 3 are wholly covered. Further, the casing 4 forms structure wherein the casing is divided into two sections of an inner and an outer section. A bracket 10 mounted on the outer peripheral surface of an outer case 1a of the motor 1 and an inner casing part 4a are integrally intercoupled through the outer case 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to the structure of a swing arm implemented in an electric scooter of the type in which a motor and a rear wheel are connected by a belt or the like to drive the rear wheel.

Conventional technology Research and development of electric scooters has already been widely carried out, and the results have been published in many patent publications and magazines, and are publicly known. things are known.

Problems to be Solved by the Invention The ultimate problem with electric scooters is that they have lower power performance and shorter cruising distance per charge than internal combustion engine scooters. This is because the amount of energy stored in a battery per unit weight or per unit volume is very small compared to hydrocarbon fuels such as gasoline.

Therefore, in order to solve the above-mentioned problems of electric scooters, many research efforts have been made to, on the one hand, increase the amount of batteries that can be installed as much as possible, and on the other hand, to reduce the power load by reducing the weight of the vehicle as much as possible. is being focused on.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the weight of a swing arm that supports a rear wheel by combining its functions, and to facilitate maintenance of the motor.

Means for Solving the Problems As a means for solving the problems of the above-mentioned prior art, the swing arm of an electric scooter according to the present invention connects the motor 1 and the rear wheel 2 with a belt, as shown in the embodiment in the drawings. Electric scooter of the type that connects with 3rd class and drives rear wheel 2
In this, the swing arm that supports the rear wheel 2 in a cantilevered manner is a hollow casing 4 that completely covers the driving pulley 5 of the motor 1, the driven pulley 6 of the rear wheel 2, the belt 3 wrapped around these, etc. Moreover, the casing 4 has a structure in which it is divided into two parts inside and outside, and the inner casing part 4a that supports the axle 8 of the rear wheel 2 and the bracket 10 on the fulcrum side that is supported by the vehicle body are respectively connected to the outer case la of the motor l.
It is characterized by a configuration in which it is integrally connected via (Fig. 2, Fig. 3).

The swing arm of the electric scooter according to the present invention also has the following features:
In an electric scooter that drives the rear wheel 2 by connecting the motor 1 and the rear wheel 2 with a belt 3 or the like, there is a swing arm that supports the rear wheel 2 on a cantilever.

It is formed as a hollow casing 4 that completely covers the drive pulley 5 of the motor 1, the driven pulley 6 of the rear wheel 2, and the belt 3 wound around these, and the casing 4 is divided into two parts inside and outside. , a fulcrum-side bracket l supported by the vehicle body at the front end of the inner casing portion 4a.
It is characterized in that O is formed integrally (Fig. 4).

Furthermore, the present invention provides that the inner casing part 4a is formed into a flat plate shape using a steel plate or a light alloy, and that a bearing 12 for the rotating shaft 1b of the motor 1 is installed in the inner casing part 4a at the installation position of the motor 1. The rotating shaft 1b of the motor 1 is supported by the bearing 12, and the inner casing part 4a also serves as the side case 13 of the motor 1, and the bearing holder 7 of the axle 8 of the rear wheel 2 is also supported by the inner casing part 4a. The outer casing portion 4b is formed integrally with the outer casing portion 4b.
is removably connected to the inner casing portion 4a with bolts 14 or the like (FIG. 4).

Each has its own characteristics.

The swing arm of the electric scooter according to the present invention also has the following features:
An outer case la of a motor l, in which a brush 1d of a motor l, a commutator 1e, and others are incorporated inside an end case cap 1c that is detachable from one end of the outer case la.
The attachment of the end case cap lc in 1 is to connect the inner casing part 4a to the outer surface opposite to the position (Fig. 2), and to attach the inner casing part 4a to the inside of the end case cap lc which can be attached to and detached from one end of the outer case la. Outer case la of motor l incorporating brush ld of motor l, commutator 1e, etc.
The end case cap lc was attached to the inner casing part 4a which also served as the side case of the motor 1 (Fig. 4).
, is also featured.

Further, in the swing arm of the electric scooter according to the present invention, one side of the inner casing portion 4a is integrally connected to the outer peripheral surface of the outer case la of the motor 1 by welding or the like, and the axle 8 of the rear wheel 2 is attached to the other side. Another feature is that the bearing holder 7 is integrally connected by welding or the like, and the outer casing part 4b is detachably connected to the inner casing part 4a by bolts 14 or the like (FIG. 2).

Function The bracket lO on the fulcrum side supported by the vehicle body and the arm part 4 of the swing arm are connected to the outer case l of the motor l.
Since the outer case la is integrally connected through the outer case la, the outer case la can be made in common, and the weight can be reduced accordingly (FIG. 2).

The swing arm (FIGS. 2 and 4), which also serves as a casing 4 that covers the belt 3, etc., achieves weight reduction and a reduction in the number of parts by combining functions.

A bearing 12 for the motor 1 is provided on the swing arm to serve as an end case, and a bearing holder 7 that supports the axle 8 of the rear wheel 2 is integrally formed (Fig. 4).
The end case becomes unnecessary, the number of parts for the bearing holder 7 is reduced, and weight reduction is also achieved.

A brush l of the motor is installed inside an end case cap lc that can be attached and detached to one end of the outer case 1a of the motor l.
d, assemble the commutator 1e and other contents (see Figures 2 and 4).
The end-carrier scan assembly LC can be freely attached and detached at any time, and the work 7 of maintenance and inspection of the brush LD, commutator 1e, etc. can be easily performed.

Example Next, a detailed description of the invention shown in the drawings will be given.

In the electric scooter shown in FIG. 1, a driving pulley 5 of a motor 1 and a driven pulley 6 of a rear wheel 2 are connected by a belt 3 (or a belt), and the rear wheel 2 is driven by using the motor 1 as a power source. It is configured to drive and travel. Storage battery 18
is mounted on the lower part of the vehicle body, and the rear wheel 2 is supported by a swing arm having a fulcrum attached by a pin 11 to a protruding piece 9a of a subtube 9 constituting the vehicle body. One end is fixed to a corner portion 15 of a horizontal seat frame 17 and sub tube 9, and the other end of the shock unit 16 is fixed to a position near the motor installation portion of the arm portion 4 of the swing arm.

The details of the structure of the swing arm are as shown in FIGS. 2 and 3. In particular, the arm portion 4 includes a drive pulley 5 of the motor 1, a driven pulley 6 of the rear wheel 2, and a belt 3 wrapped around these. It is formed as a single hollow casing that completely covers the entire area. Moreover, the casing 4 has a structure in which it is divided into two parts, the inside and the outside, and as shown in FIG. It is formed into a flat plate of steel plate or light alloy. The base end side of the inner casing portion 4a is integrally connected to the outer peripheral surface of one end side of the outer case 1a of the motor l by welding or the like.In the case of this embodiment, the rotating shaft 1b inside the motor l is 12
, 12 are installed in the side case 13.

A bearing holder 7 for an axle 8 of the rear wheel 2 is integrally connected to the tip end side of the inner casing portion 4a by welding or the like. The axle 8 of the rear wheel 2 is rotatably supported on a cantilever by a bearing 12° 12 in the bearing holder 7. The outer casing part 4b has substantially the same shape and size as the inner casing part 4a, and is removably connected to the inner casing part 4a by bolts 14 or the like and is firmly integrated therewith.

On the other hand, one end of the bracket IO is integrally and rigidly connected to the outer peripheral surface of the outer case 1a of the motor 1. Thus said bracket 10 and said inner casing part 4
a are integrally connected to each other via the outer case la of the motor 1.

An end case cap lc is removably attached to an end of the outer case 1a of the motor 1 opposite to the end to which the casing 4 is connected. Inside the end case cap lc, the internal elements of the motor 1, such as a brush 1d, a commutator 1e, and a bearing 12 for the rotating shaft 1b, are incorporated. Therefore, the end case cap l
c can be removed from the outer case la at any time to perform maintenance and inspection work on the brush ld and the like.

Embodiment of fs2 The swing arm part shown in FIGS. 4 and 5 is also formed as a hollow casing that completely covers the driving pulley 5 of the motor 1, the driven pulley 6 of the rear wheel 2, and the belt 3. Moreover, it has a structure that is divided into two parts, inside and outside. The inner casing portion 4a is formed into a flat plate shape from a steel plate, a light alloy, or the like. Furthermore, a bearing 12 that supports the rotating shaft 1b of the motor 1 is installed at the location where the motor 1 is mounted. Further, the bearing holder 7 for the axle 8 of the rear wheel 2 is integrally formed, and furthermore, the bracket 10 on the fulcrum side, which is supported by the bin 11 on the vehicle body, is also integrally formed. Therefore, this inner casing portion 4a also serves as an end case of the motor 1, and the portion that supports the rear wheel 2 has a high rigidity.

Also in the case of this embodiment, the outer casing portion 4b is integrally and removably connected to the inner casing portion 4a with bolts 14 or the like.

Therefore, in the case of the swing arm of this embodiment as well, functions are combined and members are shared, and the number of parts and weight are reduced.

The effects of the present invention have been described in detail in conjunction with the embodiments, and according to the electric scooter and its swing arm according to the present invention, the motor l and the swing arm are constructed by combining the functions of each component. Weight reduction has been achieved by reducing the number of parts, and the performance of the electric scooter has been improved by reducing the power load on the motor. Of course, this also contributes to cost reduction.

In addition, a removable end case cap l for the motor l.
With the configuration c, it is possible to easily maintain and inspect the contents of the motor.

[Brief explanation of drawings]

Fig. 1 is a side view of an electric scooter according to the present invention;
3 and 3 are a plan view and a side view showing the swing arm in detail by enlarging the rear wheel portion of FIG. 1, and FIGS. 4 and 5 are a plan view and a side view of the second embodiment. i-...Motor 2...Rear wheel 3...
Belt 5... Drive pulley 6... Driven pulley 4... Casing 8... Axle 4a...
・Inner casing part lO...bracket 1 a...outer case lb...rotating shaft 12-...bearing 13...
...Side case 7...Bearing holder 4b...
Outer casing part 14...Bolt c-...End case cap! d...Brush e...Commutator

Claims (1)

[Scope of Claims] [1] In an electric scooter that drives the rear wheel by connecting the motor and the rear wheel with a belt or the like, the swing arm that supports the rear wheel in a cantilever manner is connected to the drive pulley of the motor and the rear wheel. It is formed as a hollow casing that completely covers the driven pulleys of the wheels and the belts wrapped around them, and the casing is divided into two parts, inside and outside, with the inner casing part supporting the rear wheel axle. , and a bracket on a fulcrum side supported by a vehicle body, each of which is integrally connected via an outer case of a motor. [2] In an electric scooter that drives the rear wheel by connecting the motor and the rear wheel with a belt or the like, the swing arm that supports the rear wheel in a cantilevered manner consists of the drive pulley of the motor, the driven pulley of the rear wheel, and the The casing is formed as a hollow casing that completely covers the belt, etc. wrapped around the vehicle.The casing is divided into two parts, inside and outside, and a bracket on the fulcrum side that is supported by the vehicle body is attached to the front end of the inner casing part. A swing arm of an electric scooter characterized by being integrally formed. [3] The swing arm of an electric scooter as set forth in claim 1 or 2, wherein the inner casing portion is formed into a flat plate of steel plate, light alloy, or the like. [4] A bearing for the rotating shaft of the motor is installed in the inner casing part at the installation position of the motor, and the bearing supports the rotating shaft of the motor, so that the inner casing part also serves as a side case for the motor. In addition, the bearing holder for the rear wheel axle is also formed integrally with the inner casing part, and the outer casing part is removably connected to the inner casing part with bolts or the like. A swing arm for an electric scooter as set forth in claim 2. [5] The motor brushes, commutator, etc. are incorporated inside an end case cap that is removable to one end of the outer case.On the outer surface of the motor outer case opposite to the attachment position of the end case cap, The swing arm of an electric scooter according to claim 1, characterized in that the inner casing portion is joined. [6] The motor brushes, commutator, etc. are built into the end case cap that is detachable from one end of the outer case. The swing arm for an electric scooter according to claim 4, wherein the end portion is attached to an inner casing portion that also serves as a side case of the motor. [7] One side of the inner casing part is integrally connected to the outer peripheral surface of the motor's outer case by welding, etc., and the bearing holder for the rear wheel axle is integrally connected to the other side by welding, etc. A swing arm for an electric scooter as set forth in claim 1 or 5, wherein the outer casing portion is detachably connected to the inner casing portion with bolts or the like.