JP3240753B2 - Wheels for electric vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel for an electric vehicle (three wheels, four wheels) for simplifying the process of assembling the wheels.

[0002]

2. Description of the Related Art In general, electric vehicles used for the elderly and the weak have a three-wheel type or a four-wheel type, but a front wheel serves as a free wheel and a steering wheel, and a rear wheel serves as a drive wheel. Many are seen. For example, in the electric tricycle 1 shown in FIG. 10, when the occupant sits on the seat 2, the toes enter the inside of the front cover 3.
The occupant can operate the handlebar 4 to steer the front wheel 5 and rotate the rear wheel 6 using a battery loaded under the seat 2 as a drive source.

[0003] A handlebar 4 for steering a front wheel 5 is connected to a steering shaft 7.
Is connected to a shaft 9 fixed to the upper part of the front fork 8, as shown in FIG. Also,
The shaft 9 is supported by a chassis 10 and has a structure in which a head pipe 11 having an end protruding from the upper surface of the front cover 3 is inserted.

Since the wheel rim of a general electric tricycle 1 is small in size, a left-right split type is often used.
For example, as shown in FIG. 11, FIG. 14, and FIG. 15, the front wheel 5 is assembled with the left and right rims of the inside rim 12 and the outside rim 13 sandwiching the tire 14 and the tube 15 from both sides. A boss 16 is provided on the inside rim 12, and bearings 18 are press-fitted on both sides of the boss with a spacer 17 interposed therebetween. A positioning ring 19 is attached to the spacer 17 to facilitate the mounting of the bearing 18.

[0005] The wheel rim is aligned with four to six mounting holes 20 respectively opened in both rims, and rim aligning bolts are provided.
21, the washer 22, the lock washer 23, and the nut 24 are tightened and integrated. Reference numeral 25 is a spacer for preventing excessive tightening when the rim is made of resin. The front wheel 5 thus configured can be rotatably mounted around a front axle shaft 26 supported by the front fork 8.

In addition to the above-mentioned structure of the front wheel 5, there is also a type in which a drum mechanism is also used as a wheel rim and an inwardly expanding brake panel 27 is mounted. As shown in FIG. However, there is also a structure in which they are separately tightened together by the rim aligning bolts 21 and integrated.

Next, the configuration of the rear wheel 6 will be described with reference to FIGS. 13, 16 and 17. FIG. Similarly, the wheel rim is configured to be assembled in a split mold, and the inside rim 12 and the boss portion 16 are integrated, and the inner peripheral surface thereof is processed by a keyway type or a spline type. This boss part 16 has a gear unit
Axle shaft 29 protruding from 28 is fitted,
Otherwise, the configuration is the same as that of the front wheel 5. Also figure
As shown in FIG. 18, a structure is adopted in which the inside rim 12 and the rear brake unit 30 having the boss portion 16 are integrally fastened together with a rim aligning bolt 21 and a washer 22 when the brake mechanism is mounted. Reference numeral 31 denotes a wheel mounting hole.

As described above, the configuration of the front wheel 5 and the rear wheel 6 has been described. In addition to this, only one rim of a pair of split rims is provided with a Are disclosed as a unified version of the system.
No. 1, JP-A-61-12401).

[0009]

By the way, the above-mentioned wheel rim joins mutually wheel portions,
The outer peripheral edge of the joint surface is chamfered to form a round shape, and a groove toward the center is formed in the joint surface as shown in FIGS. Therefore, the tire
14, When connecting the tube 15, the tube
There is a risk of biting 15 (causing puncture), so a jig is used to incorporate it.

Further, at the time of assembling, both wheel rims are fixed at four to six places by rim aligning bolts 21, lock washers 23, washers 22, and nuts 24. Unless an assembling jig is used, there is also a problem that it is difficult to match the coaxiality of the rim left and right.

The present invention provides a wheel for an electric vehicle having a structure in which a tube is not pinched by devising a joint shape of a wheel portion in a split type rim, and which serves as a positioning guide for positioning when assembling the right and left rims. The purpose is to provide.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a wheel rim which forms a part of a wheel and has a shaft center.
Divided into two parts with respect to the direction constitute a pair of the rim wheel,
A cylindrical shape that supports the axle shaft on one rim wheel
Boss part is integrally formed at the axial center position, and the other rim is formed.
One side from the opposite end of the side facing the wheel
Rise of the flange-shaped part provided on the outer periphery of the rim wheel
The outer peripheral surface of the parts to the vicinity to form a stepped portion of reduced diameter annular, the outer peripheral edge of the one end face of the rim wheel and paired <br/> direction sides of other rim wheel, aligned with the step portion said collar annular having a thickness of stage differential you one of the rim wheel
A tire extending between the pair of rim wheels,
The tube is arranged and assembled .

[0013]

Since the present invention is constructed as described above, a tire and a tube are arranged between one rim wheel and the other rim wheel, and both rim wheels are pressed into contact with each other. When assembled, the collar aligns with the step . This allows the other
Support the axle shaft for the rim wheel
The positioning of the cylindrical boss portion is performed, and the alignment of the shaft center and the hole can be easily performed. Also, the seam surface when fitting
Stands on the flange-shaped part provided on the outer circumference of one rim wheel.
Since it is located in the vicinity of the rising portion, a gap for biting the tube is not formed, and the pressing operation is simple.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 6, the electric tricycle 1 has a seat 2
A battery and a drive motor are provided at the lower part of the vehicle, and a front wheel 5 operated by the handlebar 4 is a free wheel, and a rear wheel 6 operated by the drive motor is a drive wheel. As shown in FIGS. 1 and 2, the wheels used in the electric tricycle 1 are small.
Many wheel rims having flange-shaped portions formed on both sides are split type , and the wheel rim is divided into an inner rim 12 and an outer rim 13 left and right with respect to the axial direction ,
The tire 14 and the tube 15 are sandwiched and assembled. 1 and 2 show a wheel rim used for the front wheel 5, and FIG . 5 shows the front wheel.

[0015] to the inside rim 12 shown in FIG. 1 Jikukokoroi
A boss 16 is formed at the position, the inner inlet 32 is enlarged in diameter, and bearings 18 are press-fitted on both sides thereof. A spacer 17 and a positioning ring 19 are mounted between the two bearings 18. In addition, outside rim 13
From the opposing end of the inside rim 1
To the vicinity of the rising part of the flange-shaped part provided on the outer circumference of 2.
An annular stepped portion 33 having a reduced diameter is formed on the outer peripheral surface of the substrate. The step 33 may be tapered.

The outside rim 13 is the inside rim 1
Inside from the outer peripheral edge of the end face of the wheel part facing 2
A collar 34 extends toward the rim 12 and is fitted to the annular step 33 of the inside rim 12.
The thickness of the collar 34 is substantially the same as the step length of the step portion 33 so that the surface becomes smooth when fitted.
The joint surface between the rim wheels is
Located near the rising part of the flange-shaped part provided on the outer circumference
You. The wheel portion is provided with a fitting hole 35 of the boss portion 16, a mounting hole 20, and a hole 36 for an air injection valve.

The front wheel 5 is, as shown in FIGS.
To the outside rim 13 at the center of the outside rim 12
A boss portion 16 to be inserted is formed, and the inside rim 12
When the tire 14 and the tube 15 are sandwiched and assembled between the outside rim 13 and the outside rim 13 ,
The third collar 34 is pressed against the stepped portion 33 of the inside rim 12 while being aligned. As a result, the boss 16 is outsized.
The position of the center of the rim 13 coincides with the position of the center of the rim 13, and the alignment of the centers of the right and left rims is simplified . Also, the inside rim 12 and the outside rim
The seam surface of the toe rim 13 is
Located near the rising part of the flange-shaped part provided on the outer circumference
As a result, the surface becomes smooth, so that the tube 15 can be prevented from biting.

As shown in FIGS. 3 and 4, the rear wheel 6 is provided with a boss portion 16 shorter than that of the front wheel 5 on the inside rim 12, and a thread groove 37 on the inner peripheral surface of the boss portion 16. ing. The axle shaft 29 is connected to the screw groove 37. Other parts have the same configuration as the front wheel 5. Therefore, when manufacturing the rear wheel 6, the collar 34 of the outside rim 13 is
Since the pressure contact is made in alignment with 33, the shaft center can be easily adjusted and biting can be prevented.

On the other hand, the seat 2 of the electric tricycle 1 shown in FIG.
A push holder 38 is provided at the rear. As shown in FIG. 7, the push holder 38 is attached to the armrest 39.
By screwing together with the screw 40, it is fixed so as to protrude backward. Conventionally, when loading in a wagon or when assisting when traveling, there is no particular part that the helper grips,
Handling was troublesome. Since the hand push holder 38 is mounted on the rear part, as shown in FIG. 8, the front part can be easily lifted with the rear wheel 6 as a fulcrum, and the loading operation on the wagon 41 can be facilitated. As shown in
Holding from the rear is facilitated.

[0020]

Since the present invention is constructed as described above, when a set of rim wheels is assembled, the rim wheel
The seam surface between the wheels is on the outer circumference of one rim wheel
Located near the rising part of the provided flange-shaped part and assembled
At the end of the annular rim of the other rim wheel
Significantly reduces the risk of biting when mated
it can. Also, the boss part is one side for one set of rim wheels
, The center of the shaft can be easily aligned. For this reason,
Jigs for biting prevention and alignment are not required,
The number of assembling steps can be reduced, and the troublesomeness at the time of assembling can be reduced. In addition, there is an effect that compatibility can be maintained since there is no effect on appearance.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rim wheel of a front wheel according to an embodiment of the present invention.

FIG. 2 is a sectional view of a front wheel using the rim wheel shown in FIG.

FIG. 3 is a cross-sectional view of the rear rim wheel of the embodiment.

FIG. 4 is a sectional view of a rear wheel using the rim wheel shown in FIG. 3;

FIG. 5 is a development view of the front wheel shown in FIG. 2;

FIG. 6 is a perspective view of the electric tricycle of the embodiment.

7 is an exploded view of a seat portion of the electric tricycle shown in FIG.

FIG. 8 is a side view showing a method of operating the electric tricycle shown in FIG.

FIG. 9 is a side view showing an operation method of the electric tricycle shown in FIG.

FIG. 10 is a perspective view of a conventional electric tricycle.

11 is a development view of a front wheel portion of the electric tricycle shown in FIG.

FIG. 12 is a development view of another conventional front wheel.

13 is a development view of a rear wheel of the electric tricycle shown in FIG.

14 is a sectional view of a rim wheel of a front wheel of the electric tricycle shown in FIG.

15 is a sectional view of a front wheel using the rim wheel shown in FIG.

16 is a sectional view of a rim wheel of a rear wheel of the electric tricycle shown in FIG.

17 is a sectional view of a rear wheel using the rim wheel shown in FIG.

FIG. 18 is a development view of another conventional rear wheel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric tricycle 5 Front wheel 6 Rear wheel 12 Rim wheel 13 Rim wheel 14 Tire 15 Tube 33 Step section 34 Collar

Claims (1)

(57) [Claims] 1. A wheel rim which forms a part of a wheel as an axis
A set of rim wheels is divided into two parts in the center direction.
And support the axle shaft on one rim wheel
A cylindrical boss is formed integrally with the shaft center and
From the opposite end of the side facing the rim wheel,
Of the flange-shaped part provided on the outer circumference of the rim wheel
The outer peripheral surface to the rising portion near to form a stepped portion of reduced diameter annular, the outer peripheral edge of the one end face of the rim wheel and <br/> opposing sides of other rim wheel, aligned with the step portion Rimuhoi an annular collar having a thickness of stage <br/> difference you of the one
A wheel for an electric vehicle, wherein the wheel extends for the vehicle, and a tire and a tube are arranged between the pair of rim wheels.