JP3266944B2 - Electric vehicle frame structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of an electric vehicle in which an elderly person or the like rides on a general sidewalk.

[0002]

2. Description of the Related Art Generally, an electric vehicle has a battery mounted on a vehicle body frame and runs by driving a motor using the battery as a power source. A passenger can arbitrarily start and stop by operating a steering wheel. it can. In addition, it can be transported to a destination far away by a passenger car or the like and used there. in this case,
Electricity that can be divided and assembled so that it can be easily loaded on passenger cars, etc.
Moving vehicles are used.

For example, a vehicle body frame 1 shown in FIG. 17 is divided into a front frame 1a and a rear frame 1b. The front frame 1a is formed by covering a floor cover 3 on a front frame pipe 2. A fitting portion 4 is provided at a rear end of the front frame pipe 2, and a ring-shaped stopper 5 is provided on an outer periphery of the fitting portion 4. Is provided. A steering shaft 7 for steering the front wheels 6 is provided at a front portion of the front frame 1a, and a cross member 9 having an upright seat post pipe 8 is provided at the front frame pipes 2 on both rear sides. .

A receiving pipe 11 into which the fitting portion 4 of the front frame pipe 2 is inserted is attached to a rear frame pipe 10 of the rear frame 1b. The rear frame pipe 10 supports a gear case 13 that transmits a rotational force to the rear wheel 12, and this portion is covered with a rear cover 14. The fitting portion 4 and the receiving pipe 11 are provided with a hole 16 through which the lock pin 15 passes when the fitting portion 4 is inserted into the receiving pipe 11.

As shown in FIG. 18, the body frame 1 is integrated with a bumper / inverted stand frame 17 provided at the rear of the rear frame 1b to support the rear frame 1b upright.
Turn the receiving pipe 11 upward. Next, the front frame 1a is lowered from above with the fitting portion 4 facing downward, the fitting portion 4 is inserted into the receiving pipe 11, and the positions of the holes 16 provided in the fitting portion 4 and the receiving pipe 11 are determined. Then, the front frame 1a and the rear frame 1b are integrated by incorporating the lock pin 15 into the hole 16. Thus, the assembling operation is completed, and the body frame 1 is completed. In addition, when dividing, the body frame 1 is divided into two by performing the reverse operation.

[0006]

In the prior art described above, when assembling the body frame 1 of the electric vehicle , the rear frame 1b is raised and the rear frame pipe 10 is set up.
Insert the fitting part 4 of the front frame pipe 2 of the front frame 2 into the receiving pipe 11 of the
However, since the fitting portion 4 of the front frame is inserted into the receiving pipe 11 from above, there is a problem that the insertion is difficult and the assembly takes time.

After the fitting portion 4 is inserted, the lock pin 15 is assembled only by inserting the lock pin 15 into the hole 16, so that the fitting portion 4 and the receiving pipe 11 are prevented from rattling after assembly. I was trying to increase the accuracy. However, if the insertion accuracy is increased, the insertion of the receiving pipe 11 into the fitting portion 4 becomes difficult. Also, the lock pin 15 could not be efficiently incorporated into the hole 16.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an electric motor in which the assembling and dividing of a vehicle body frame is performed from the lateral direction by utilizing the weight of the vehicle body to improve the workability of the assembling. It is an object to provide a vehicle frame structure.

[0009]

According to the present invention, as a means for solving the above-mentioned problems, a vehicle body frame includes a front frame having a seat post pipe for mounting a seat, and a rear frame connected to the front frame. Forming each of the rear frame and the front frame
Attach the frames to each other at the top and bottom of the
Connecting means, provided on the upper part of the front frame.
At the position adjacent to the seat post pipe,
A lock shaft for connecting the frame;
The rear shaft is rotated by the rotation of the lock shaft.
Cam mechanism to press the frame against the front frame,
Between the start of rotation of the shaft and the completion of rotation.
A lever that covers a part of the upper part of the seat post pipe
And protrusions are provided.
You.

[0010]

According to the present invention, the upper and lower portions of the rear frame,
In addition, connecting means at the top and bottom of the front frame respectively
And these coupling means are engaged with each other to
Both the frame and the rear frame are joined together.
At this time, the cam unit
Provide a lock shaft with
When assembled to the front frame, the lock shaft
Rotate by lever and rear frame by cam mechanism
Press and fix to the front frame. Also, this lock
When the rotation of the lock shaft is completed,
The protruding portion to face the sheet over preparative posts pipe side, Shitoposu
Engage with the lower rod of the seat fitted to the top pipe and lock
Stop the shaft from turning. Further, the lock shuff
To lift the rear of the front frame
Can be.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The same members as in FIG. 17 and FIG. 18 will be described with the same reference numerals. First, the entire electric vehicle 18 such as an electric tricycle will be described. As shown in FIGS. 13 and 14, the body frame 1 of the electric vehicle 18 is schematically constituted by a front frame 1a and a rear frame 1b. And the front frame 1a
The front frame pipe 2 is covered with a floor cover 3 and a steering shaft 7 is provided upright. A front fork (not shown) is provided on the steering shaft 7
The front wheel 6 is connected via the. A handlebar 20 provided with a control box 19 is connected to an upper portion of the steering shaft 7. A battery 21 is mounted on the rear of the floor cover 3, and a seat 22 is detachably provided above the battery 21.

On the other hand, rear wheels are provided on both sides of the rear frame 1b.
A rear wheel 12 is driven by a motor (not shown) housed in a rear cover 14. When the occupant sits on the seat 22 with his feet on the floor cover 3, the handlebar 20 is accessible. And the crew is in control box 19
Can be operated by operating various switch levers (not shown) provided on the vehicle and moving the handlebar 20.

Next, a divided structure of the electric vehicle 18 will be described with reference to FIGS. In the present embodiment, the body frame 1 of the electric vehicle 18 from which the battery 21 and the seat 22 are removed is divided into a front frame 1a and a rear frame 1b. The front frame 1a and the rear frame 1b are divided at the rear of the front frame pipe 2 of the front frame 1a and at the top of the seat post pipe 8 on which the seat 22 is mounted.
An angle changing mechanism (not shown) is provided at the base 7a of the steering shaft 7, and the steering shaft 7 is tilted backward so that the steering shaft 7 can be folded above the floor cover 3.

As described above, the electric vehicle 18 includes the battery 21, the seat 22, the front frame 1a, and the rear frames 1b and 4.
The division and the folding of the steering shaft 7 reduce the weight of the electric vehicle 18 to make it easier to handle. Further, the overturn prevention bar 23 attached to the rear portion of the rear frame 1b is to make the rear frame 1b stand still at a certain angle when the rear frame 1b is divided from the front frame 1a. FIG. 16 shows a state where the rear side of the front frame 1a is lifted upward to release the connection with the rear frame 1b.

Next, the divided front frame 1a and rear frame 1b will be described with reference to FIGS. Both sides of the front frame 1a are front frame pipes 2, and a cross member 9 is provided orthogonally on the rear side. The central portion of the cross member 9 is provided upright seat post pipe 8, the upper end of the seat post pipe 8 holes 8a to the bottom of the rod of the seat 22 is fitted detachably is provided, the seat post pipe At the upper part of 8 , a connecting portion A is provided as connecting means for connecting the rear frame 1b. The connection portion A will be described later in detail. In addition, a coupling hand is provided at the rear of the front frame pipe 2.
A rear frame receiving bar 25 having a groove 24 as a step is provided so as to protrude in the laterally outward direction.

On the other hand, side frames 26 are provided on both sides of the rear frame 1b, and the side frames 26 have drive unit holding portions 26a on both inner sides. The left and right drive unit holders 26a are member pipes in the middle.
27 is connected and fixed. The rear cover 28 is fixed to the upper end 26b of the side frame 26 with bolts 28a. An axle shaft 29 connected to the rear wheel 12 (FIG. 2)
) Is rotatably mounted below the left and right side frames 26 by a swing arm 31 connected to the drive unit 30.

Further, the rear side of the drive unit 30 is supported by attaching the upper end of a rear cushion unit 32 having a lower end rotatably attached to the drive unit 30 to an upper portion of the side frame 26. In the center of the member pipe 27 , a connecting portion B as a connecting means is provided forward. The connection portion B will be described later in detail. The lower end of the side frame 26 is engaged with the groove 24 of the rear frame receiving bar 25 of the front frame pipe 2 by coupling means.
A holder bracket 34 having a notch 33 is provided.

Next, a connecting portion A and a connecting portion B which are main parts of the present invention will be described with reference to the drawings. First, the connecting portion A will be described with reference to FIGS. As shown in the figure, a bracket 35 is fixed to the upper part of the seat post pipe 8 in a rearward direction. The rear end of the bracket 35 is provided with a concave or V-shaped receiving portion 37 for receiving a bar 36 (see FIG. 1) of a connecting portion B described later. Further, a holder pipe 38 is provided in the upper central portion of the bracket 35 so as to penetrate the bracket 35 in the up-down direction. At the lower end of the holder pipe 38, a guide portion 38a (see FIG. 6) for guiding a lock shaft 40 described later is provided.

A lock shaft 40 for fixing a lock bar 39 (see FIG. 4) of a connecting portion B described later is rotatably inserted into the holder pipe 38. The lock shaft 40 is incorporated together with the coil spring 41. Therefore, the coil spring 41 is always
Is pushed upward.

A lever 42 for vertically moving and rotating the lock shaft 40 is provided on an upper portion 40a of the lock shaft 40. Further, the lever 42 is provided with a square protrusion 42a. The lever 42 is fixed by fitting a holder 43 provided at a lower portion of the lever 42 to an upper portion 40a of the lock shaft 40 and tightening a bolt 44 and a nut 45.

Further, a bolt hole 46 is provided in the upper part of the lock shaft 40, and an L-shaped guide hole 47 (see also FIG. 5) provided in the holder pipe 38 is inserted into the bolt hole 46, and A guide bolt 48 engaged with the guide hole 47 is attached. The movement of the lock shaft 40 is regulated by the guide bolt 48 and the guide hole 47. An eccentric portion 40b, which is a cam mechanism having a different axis from the lock shaft 40, is provided below the lock shaft 40.

Next, the connecting portion B will be described with reference to FIGS. As shown in the figure, the member pipe of the connecting portion B
A pair of brackets 49 in the upward direction and a pair of brackets 50 in the forward direction are provided on the upper part of the intermediate portion of the 27. The upper bracket 49 is provided with a vertically elongated bolt hole 51, and the front bracket 50 is also provided with a longitudinally elongated bolt hole 52.

A bar 36 is interposed between a pair of upper brackets 49 in parallel with the member pipe 27 and is fixed by bolts 53. The bar 36 is a bolt hole 51 provided in the bracket 49
Are long holes in the vertical direction, so that position adjustment in the vertical direction can be easily performed. A nylon collar 54 is fitted around the bar 36.

A lock bar 39 parallel to the member pipe 27 is interposed between a pair of front brackets 50 and is fixed by bolts 55. Lock bar 39 is bracket 50
Since the bolt holes 52 provided in the holes are elongated holes in the front-rear direction, position adjustment in the front-rear direction can be easily performed. Notched flat part on the member pipe 27 side of the lock bar 39
56 are provided. In the drawing, the reference numeral 57 indicates a lock washer, and the reference numeral 58 indicates a flat washer. The reference numeral 59 in FIG. 1 denotes a transport handle.

Next, the operation of this embodiment will be described. As described above, the bracket 35 having the V-shaped receiving portion 37 opened rearward is provided above the seat post pipe 8 of the front frame 1a, and the holder pipe 38 having the L-shaped guide hole 47 formed in the bracket 35. The holder pipe 38
Then, the lock shaft 40 provided with the eccentric part 40b at the lower part was inserted through the coil spring 41, and the guide bolt 48 engaged with the L-shaped guide hole 46 was attached to the upper part of the lock shaft 40. Then, the lock shaft 40 can be moved up and down along the L-shaped guide hole 46, and can be rotated by pushing down. Further, since the guide bolt 48 attached to the lock shaft 40 is engaged with the guide hole 47, the lock shaft 40 can be used for lifting the rear part of the front frame 1a.

The side frame 26 of the rear frame 1b
A bar 36 is provided above the member pipe 27 provided therebetween, and a lock bar 39 is provided at the front of the member pipe 27.When the front frame 1a and the rear frame 1b are integrally connected, the rear frame 1b The bar 36 provided on the front frame
It is possible to abut the concave receiving portion 37 provided in 1a and further to arrange the lock bar 39 below the receiving portion 37. When the lock shaft 40 is pushed down and rotated along the L-shaped guide hole 47, the lock bar 39 can be locked by the eccentric portion 40b at the lower portion of the lock shaft 40.

A receiving bar 25 is attached to the rear end of the front frame pipe 2 of the front frame 1a, and a holder bracket 34 is provided below the side frame 26 of the rear frame 1b.
Is provided, the receiving bar 25 can be engaged with the holder bracket 34. In addition, the front frame 1a whose rear portion is lifted by the lock shaft 40 during engagement.
Is lowered so that the receiving bar 25 and the holder bracket 34 are engaged with each other, whereby the front frame 1a and the rear frame 1b can be easily assembled by the weight of the front frame 1a.

Further, when disassembling the integrated vehicle body frame 1, if the lock shaft 40 is rotated along the L-shaped guide hole 47, the lock shaft is rotated by the coil spring 41 provided in the holder pipe 38. The lock bar 39 and the lock shaft 40 are disengaged from each other naturally, and the front frame 1a and the rear frame 1b are disassembled by the force of falling to the rear of the rear frame 1b. The frame 1a and the rear frame 1b can be divided.

Next, attachment and detachment of the electric vehicle 32 will be described. The states shown in FIGS. 5 and 6 are unlocked states. At this time, the front frame 1a and the rear frame 1b
Are separated. To connect, the notch of the holder bracket 34 provided at the lower left and right of the rear frame 1b shown in FIG.
When the groove 24 of the receiving bar 25 provided on the front frame pipe 2 of the front frame 1a is fitted into 33, and the receiving bar 25 is rotated, the connecting portion A and the connecting portion B are pressed against each other.

That is, when the rear frame 1b rotates forward about the receiving bar 25, the bar 36 of the rear frame 1b is rotated.
Is received by the V-shaped receiving portion 37 of the front frame 1a, and the front frame 1a and the rear frame 1b are connected to keep the balance. But the front frame
If 1a is lifted, the balance will be lost and it will be separated, so it will be necessary to lock. Hereinafter, the lock mechanism will be described.

In the unlocked state shown in FIGS. 5 and 6,
Since the lock shaft 40 has the guide bolt 48 located at the upper end of the L-shaped guide hole 47 provided in the holder pipe 38, the eccentric portion 40b of the lock shaft 40 is located at the lower surface of the guide portion 38a of the holder pipe 38. The bottom is not out. Therefore,
The rear frame 1b can rotate around the receiving bar 25 in the front-rear direction.

Next, at the time shown in FIGS. 7 and 8, the lock shaft 40 is pushed downward through the lever 42, and the guide bolt 48 is moved along the L-shaped guide hole 47 of the holder pipe 38 to thereby lock the lock shaft 40. It is in a state of being rotated in a counterclockwise direction. In this state, since the lock shaft 40 is pressed downward, the eccentric portion 40b of the lock shaft 40 protrudes below the guide portion 38a of the holder pipe 38 and is between the lock bar 39 provided on the rear frame 1b and the member pipe 27. Will be located.

Here, as shown in FIG.
Eccentric portion 40b of 40 because of the eccentricity of the shaft center of the lock shaft 40, there is a gap C between the flat portion 56 of the eccentric portion 40b and the lock bar 39 (see also FIG. 8), The rear frame 1b is not separated from the front frame 1a, but has a play.

Then, as shown in FIG. 10, when the lever 42 is further rotated and the guide bolt 48 reaches a position where it becomes a stopper at the end of the L-shaped guide hole 47, FIGS.
Since the lower portion of the eccentric portion 40b of the lock shaft 40 as shown is slightly beyond the position of the position to press the flat portion 56 of the lock bar 39 to the maximum, i.e., as shown in FIG. 12, the eccentric portion
40b slightly exceeds the position where the flat portion 56 is pressed to the maximum, and rotates by a distance D (see also the arrow in FIG. 12).
39 is constantly pressed toward the front frame 1a.

The upper bar 36 of the member pipe 27 and the receiving portion 37 of the bracket 35 of the front frame 1a serve as a stopper in the direction in which the rear frame 1b is pulled toward the front frame 1a. The frame 1a and the rear frame 1b enter a locked state in a state where they are pulled together.

Further, since the lock shaft 40 is stopped in a state where the eccentric portion 40b slightly exceeds the position where the lock bar 39 is pushed to the maximum, it is difficult to rotate in the unlocking direction. However, if the lock shaft 40 is a lock bar
If you try to turn in the direction to release 39, lock shaft 40
Of the lever 42 is engaged with the lower rod of the seat 22 (see FIG. 11), so that the vehicle body frame 1 does not separate when the occupant is in the vehicle body. .

The disassembly of the body frame 1 is performed in reverse. Since the lock shaft 40 is always pushed upward by the coil spring 41, if the lever 42 is rotated clockwise, the lock shaft 40 is moved along the L-shaped guide hole 46.
When the front frame 1a is lifted up with the lever 41 as it is, it is naturally separated by the force of falling to the rear of the rear frame 1b (see also FIG. 2).

[0038]

Since the present invention is constructed as described above, the dividing and assembling work of the vehicle body frame can be performed from the lateral direction, and the work can be performed with one touch without any tools. Therefore, workability can be improved. In addition, instead of connecting the front frame and the rear frame with pins as in the past ,
Connection means at the top of the rear frame and
Since the joining is performed by the engagement of the joining means, the accuracy of the joining can be improved. Also at the top of the front frame
Provided with a lock shaft having a cam mechanism in the coupling means.
The rear frame was assembled to the front frame
At this time, if the lock shaft is rotated,
Press the rear frame against the front frame to
Can be firmly fixed.

Further, since both the dividing and assembling operations can be performed by utilizing the own weight of the vehicle body frame, the operations can be performed easily, thereby improving the workability.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a side view of a rear frame portion of FIG.

FIG. 3 is an exploded perspective view showing part A of FIG. 1 in an enlarged manner.

FIG. 4 is an exploded perspective view showing a portion B of FIG. 1 in an enlarged manner.

FIG. 5 is a perspective view showing a state where the lock shaft of FIG. 1 is pushed up.

FIG. 6 is a cross-sectional view showing a state before assembly of a portion A and a portion B of FIG. 1;

FIG. 7 is a perspective view showing a state where the lock shaft of FIG. 1 is pushed down.

FIG. 8 is a cross-sectional view showing a state where the lock shaft of FIG.

FIG. 9 is a bottom view of FIG.

10 is a perspective view showing a state where the lock shaft of FIG. 1 is rotated.

FIG. 11 is a cross-sectional view showing a state where the lock shaft of FIG. 1 is rotated to firmly connect the portion A and the portion B.

FIG. 12 is a bottom view of FIG. 11;

FIG. 13 is a perspective view of an electric vehicle.

FIG. 14 is a side view of FIG.

FIG. 15 is an exploded side view of FIG. 14;

FIG. 16 is a side view showing a portion obtained by dividing FIG.

FIG. 17 is a perspective view of a conventional electric vehicle.

FIG. 18 is a side view showing the assembly of FIG. 17;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body frame 1a Front frame 1b Rear frame 8 Seat post pipe 25 Receiving bar 34 Holder bracket 40 Lock shaft 40b Eccentric part 42 Lever 42a Projection part A Connection part B Connection part

Claims (1)

(57) [Claims] 1. A body frame forming a front frame having a seat post pipe for seat mounting, by the rear frame for coupling to the front frame, 該Ri
And the upper portions of the front frame and the front frame, respectively.
At the lower part, a connecting means for assembling the two frames with each other is provided.
Connecting means at the top of the front frame,
At the position adjacent to the post post pipe.
A lock shaft to be coupled to the lock shaft;
Moves the rear frame by rotating the lock shaft.
A cam mechanism that presses against the front frame and a lock shuff
At least from the start of rotation of the
Lever and projecting part of upper part of seat post pipe
Frame of an electric vehicle characterized by having a part provided.
Structure.