JPH07285345A - Frame structure for electric vehicle - Google Patents

Abstract

PURPOSE:To provide a small and lightweight electric vehicle easy to maintain and inspect. CONSTITUTION:The rear ends of a pair of the right and left inverse U-shaped longitudinal frames 5, 5 are rotatably supported on both sides of the rear section of a travel frame 4, and nearly the center sections of the longitudinal frames 5, 5 are connected and reinforced with horizontal connecting bars 6, 6. A support member 8 capable of being fitted with a chair or the like is fitted to the connecting frames 6, 6, a cover 9 opened only at the portion corresponding to the support member 8 and covering the travel frame 4 is fitted to the longitudinal frames 5, 5, and the front ends of the longitudinal frames 5, 5 are fitted to the front section of the travel frame 4. This frame structure is small and lightweight, it has sufficient strength, and its maintenance and inspection can be easily made.

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 such as an electric wheelchair for care and an electric carrier.

[0002]

2. Description of the Related Art In this type of electric vehicle, a technique for constructing a cover for covering a battery, a motor and the like mounted on a traveling frame so that the cover can be opened and closed for maintenance and inspection is described in Japanese Utility Model Publication No. 3-33
No. 626, etc.

[0003]

In the prior art as described above, the cover is simply configured to be openable and closable, and a heavy object such as a seat is directly mounted on the cover. Therefore, the strength of the cover itself must be extremely increased, the weight of the vehicle body becomes heavy, and an opening / closing assisting device such as an air damper is required for opening / closing the cover. The present invention is intended to solve the above-mentioned drawbacks of the prior art and to provide a lightweight frame structure of an electric vehicle while having sufficient strength.

[0004]

[Means for Solving the Problems] Battery 1, motor 2
Etc. and a pair of left and right inverted U-shaped front and rear frames 5, 5 are rotatably supported on both sides of a rear portion of a traveling frame 4 for suspending a pair of left and right drive wheels 3, 3, and The substantially central portions of the frames 5 and 5 are connected and reinforced by the left and right connecting rods 6 and 6, and a supporting member 8 to which a chair 7 or the like can be attached is attached to the connecting frames 6 and 6, and only the supporting member 8 corresponding portion is attached. A frame structure of an electric vehicle in which a cover 9 that is opened and covers the traveling frame 4 is attached to the front and rear frames 5 and 5, and the front ends of the front and rear frames 5 and 5 can be fixed to the front portion of the traveling frame 4. To do.

[0005]

When performing maintenance such as water replenishment for the battery 1 mounted on the traveling frame 4 and adjustment of the motor 2, the front and rear frames 5, 5 are provided with knob bolts 30,
30 is removed and the connection state with the traveling frame 4 is released,
In this state, when the front part of the cover 9 is lifted and lifted rearward and upward, the cover 9 pivots rearward and upward together with the front and rear frames 5 and 5 whose rear ends are rotatably supported on both sides of the rear part of the traveling frame 4. As a result, the upper parts of the battery 1, the motor 2, etc. mounted on the traveling frame 4 are opened, so that maintenance and inspection work can be easily performed.

A heavy member such as a chair 7 is attached to left and right connecting rods 6 and 6 for connecting and reinforcing substantially the central portions of the front and rear frames 5 and 5, and a supporting member 8 protruding upward from an opening of a cover 9.
Since it is attached to the vehicle, the weight member can be firmly supported with sufficient strength, and the cover 9 has an inverted U-shape whose rear end is rotatably supported on both sides of the rear part of the traveling frame 4. It is attached to the front and rear frames 5 and 5, and the cover 9 can be made thin and lightweight with a light material such as a resin material. The cover itself can be made lighter as a whole and the opening and closing operations can be assisted by an air cylinder or the like. It can be done easily without the need for a power plant.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment is one in which the present invention is applied to an electric wheelchair for nursing care and is constructed as follows. Reference numeral 4 denotes a traveling frame, which is a box-shaped mounting frame 10 having a shallow bottom, and a section L welded to the rear end of the mounting frame 10 and extending rearward.
It is composed of left and right suspension frames 11, 11 and the like. On the mounting frame 10, there are two batteries 1 and 1 and a control box 12 that houses an electronic control board.
A transformer 13 for charging the battery 1 and the like are mounted.
In addition, the suspension frame 11 on one side is provided with the motor 2 on one side inward.
A gear box 14 for connecting the left and right suspension frames 11, 11 is attached to the left and right suspension frames 11, 11 by projecting axles 15, 15 from both lower sides of the gear box 14.
It is rotatably supported by. The rear wheels 3 and 3 are attached to both ends of the axles 15 and 15. A rotation detector 16 is mounted on the end of the motor 2 and
It is used to control the traveling speed by detecting the number of revolutions. Reference numeral 17 denotes a bumper step for stepping over the step, which is attached between the suspension frames 11 and 11 at the rear ends thereof and also serves to reinforce the traveling frame 4.

A single pipe frame 18 is welded to the lower surface of the center of the mounting frame 10 and extends forward, and a wide step 19 for mounting a foot is fixed to the front portion thereof. 20, 2
Reference numeral 0 denotes a pair of left and right caster wheels, which is a step for foot placement 1
A shaft 23 is rotatably attached to the lower end of a frame 22 having a caster angle, which is rotatable left and right around a vertical axis 21 hanging from both sides. Reference numerals 5 and 5 are front and rear frames, which are formed by bending a pipe material into an inverted U shape, and a bracket 24 is welded to the rear end of the frame, and the rear of the suspension frame 11 is inserted through the bracket 24. A pivot 25 is rotatably attached to the end. The left and right front and rear frames 5, 5 are substantially reinforced at their central portions with the left and right connecting rods 6, 6 and the support member 8 is formed by bending the front and rear left and right connecting rods 6, 6 in a planar rectangular shape. Is welded. Reference numeral 9 is a cover made of a synthetic resin material, and an opening 26 is formed in the central portion corresponding to the supporting member 8 and is screwed to the front and rear frames 5 and 5.

The cover 9 is formed so as to cover the upper part of the traveling frame 4 and the front, rear, left and right, and the lower part of the front surface thereof is separated slightly forward from the front and rear frames 5, 5 so that the cover 9 is attached to the outer periphery of the mounting frame 10. The front lower ends of the front and rear frames 5 and 5 are located inside the mounting frame 10. 27 and 27 are mounting holes provided in the cover 9, 28 and 28 are through holes provided in the mounting frame 10,
Reference numerals 29 and 29 are screw holes provided in the front and rear frames 5 and 5, and can be fixed by knob bolts 30 and 30. At the center of the support member 8, the insertion hole 32 of the mounting member 31 is provided.
On both sides thereof, screw holes 33, 33 for fixing the mounting member 31 are provided.
The chair 7 is attached to the mounting member 31. The armrests 35, 35 are attached to the chair 7 via the mounting brackets 34, 34 on both sides, and the pair of left and right handles 36, 36 are attached to the mounting brackets 34, 34. The rear portions 36, 36 are bent inward and grips 37, 37 are provided. Reference numeral 38 denotes a connecting rod, which connects the left and right handles 36, 36. An operation box 39 is provided with an accelerator lever 40 and various operation switches.

The caregiver is placed on the chair 7 and the operator handles the handle 3.
While holding 6, 36, travel while adjusting the speed by the accelerator lever 40. Next, when performing maintenance and inspection such as water replenishment of the battery 1 and adjustment of the motor 2, the knob bolts 30 and 30 on the front surface of the cover 9 are removed, and the connection between the traveling frame 4 and the front and rear frames 5, 5 and the cover 9 is released. Cover 9
When the front part is held and lifted upward, the cover 9 and the chair 7, the handles 36, 36, etc. are integrally rotated rearward around the pivotal supports 25, 25 at the rear ends of the front and rear frames 5, 5 to move the traveling frame 4
The upper parts of the battery 1, the motor 2, etc. mounted on the vehicle are opened, so that maintenance and inspection work can be easily performed.

A heavy member such as the chair 7 is attached to the left and right connecting rods 6 and 6 for connecting and reinforcing the substantially central portions of the front and rear frames 5 and 5, and the supporting member 8 protruding upward from the opening 26 of the cover 9. As it is installed, the chair 7 has sufficient strength.
And the like, and the cover 9 has an inverted U shape in which a rear end of the traveling frame 4 is rotatably supported at both rear ends thereof.
The cover 9 is attached to the front and rear frames 5, 5 and the cover 9 can be made thin with a light material of synthetic resin, and the weight of the cover itself can be reduced and the opening / closing operation can be easily performed. Also, the whole can be made small and compact.

[Brief description of drawings]

FIG. 1 is a side view.

FIG. 2 is a side view showing a state in which a cover 9 is opened.

FIG. 3 is a plan view.

FIG. 4 is a perspective view of a main part.

[Explanation of symbols]

 1 Battery 2 Motor 3 Drive Wheel 4 Travel Frame 5 Front / Back Frame 6 Connection Frame 7 Chair 8 Support Member 9 Cover

Claims (1)

[Claims] 1. A pair of left and right inverted U's are provided on both sides of a rear portion of a traveling frame (4) on which a battery (1), a motor (2), etc. are mounted and a pair of left and right drive wheels (3), (3) are suspended. The rear ends of the character-shaped front and rear frames (5) and (5) are rotatably supported, and the substantially central portions of the front and rear frames (5) and (5) are connected by left and right connecting rods (6) and (6). A support member (8) capable of attaching a chair (7) and the like to the reinforcing frames (6) and (6) is reinforced, and only the corresponding portion of the support member (8) is opened to form the traveling frame (4). A cover (9) for covering is attached to the front and rear frames (5), (5) and the front ends of the front and rear frames (5), (5) can be fixed to the front part of the traveling frame (4). Electric vehicle frame structure.