JP4133802B2 - Motor drive vehicle - Google Patents

Description

  The present invention relates to a motor-driven vehicle.

As a conventional motor-driven vehicle, a vehicle in which a motor is disposed inside a wheel is known (see, for example, Patent Document 1).
JP-A-3-31029

  In the electric vehicle disclosed in Patent Document 1, for example, the distance between the left and right drive wheels, that is, the tread, cannot be made smaller than a certain value in order to ensure the turning performance of the electric vehicle. If the tread can be made small while ensuring turning performance, the vehicle width can be reduced and the vehicle can be downsized.

  An object of the present invention is to reduce the size of a motor-driven vehicle while ensuring turning performance.

According to the first aspect of the present invention, a double wishbone suspension comprising an upper arm and a lower arm is attached to the rear portion of a vehicle body frame, and a drive wheel driven by an electric motor disposed on the inner side of the wheel on the tip side of the double wishbone suspension. In a vehicle such as a three-wheeled vehicle or four-wheeled vehicle that is rotatably mounted, a double wishbone suspension is supported by a common swing shaft in which the left and right upper arms and the left and right lower arms are respectively attached to the body frame. The upper arm and the lower arm can swing left and right, and the left and right upper arms or the left and right lower arms are swingably attached to the links, and the bell cranks are swingably attached to the ends of these links. So It mounted for swinging the central portion of the connecting member to the body frame together with the connecting the first arm portion provided on, respectively in the coupling member, the damper passes between the second arm portion provided on the respective left and right bell crank It is characterized by that.

  Since the body frame of the motor-driven vehicle can swing left and right with respect to the upper arm and the lower arm, for example, the body frame is turned by tilting the body to the side where the driver turns while turning the vehicle and moving the center of gravity. It is possible to incline to the side, and even if the tread of the left and right drive wheels is small, the turning performance is greatly improved.

In addition, when the body frame swings left and right, the left and right upper arms move substantially parallel to the left and right with respect to the left and right lower arms. Because it tilts toward, it becomes easy to turn.

The invention according to claim 2 is characterized in that a cargo bed is attached to the connecting member.
When the left and right upper arms move substantially parallel to the left and right as the body frame swings to the left or right, the connecting member and the cargo bed move almost in parallel, so the cargo bed hardly tilts.

The invention according to claim 3 is characterized in that a battery is mounted on the loading platform.
Since the loading platform is on the non-oscillating side, the battery is securely held.

  In the invention according to claim 1, since the body frame of the motor-driven vehicle can swing left and right with respect to the upper arm and the lower arm, for example, the body is tilted toward the side where the driver turns while the vehicle is turning, and the center of gravity is moved. By doing so, the vehicle body frame can be tilted toward the turning side, and the turning performance can be greatly improved even if the treads of the left and right drive wheels are small.

In addition, when the body frame swings left and right, the left and right upper arms move substantially parallel to the left and right with respect to the left and right lower arms. Therefore, the motor-driven vehicle can be turned easily.

In the invention according to claim 2 , since the connecting member and the loading platform also move substantially in parallel when the left and right upper arms move substantially parallel to the left and right as the body frame tilts to the left or right, the connecting member and the loading platform are mostly The object mounted on the loading platform can be securely held without tilting.

In the invention which concerns on Claim 3 , since a loading platform exists in the non-oscillation side, a battery can be hold | maintained reliably.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a motor-driven vehicle according to the present invention. The motor-driven vehicle 10 has a front wheel 13 attached to a front portion of a body frame 11 via a front fork 12 and left and right suspension arms at a rear portion of the body frame 11. The rear wheels 14 and 15 (only the reference numeral 14 on the front side are shown) are attached as left and right drive wheels via (described later in detail). For example, the vehicle body frame 11 is swung left and right with respect to the suspension arm during turning. It is a swingable tricycle that can move.

  The vehicle body frame 11 includes a head pipe 17 provided at the front end, a down pipe 18 extending substantially downward from the head pipe 17, and a lower pipe 21 extending substantially U-shaped from the middle of the down pipe 18 to the left and right. , 22 (only the reference numeral 21 on the front side is shown), a center pipe 23 extending rearward from the middle of the down pipe 18, a rear end of the lower pipes 21, 22 and a rear end of the center pipe 23 to support the storage box 24 A center support frame 24 connected to the lower pipe 21, a cross pipe (not shown) passed to the lower part of the lower pipes 21 and 22, a single under frame 26 extending rearward, and the under frame 26 and the center support frame 24. Left and right vertical frames 27 and 28 (only the reference numeral 27 on the front side is shown) provided vertically.

  More specifically, the motor-driven vehicle 10 has a front fork 12 attached to a head pipe 17 via a steering shaft (not shown) so that the front fork 12 can be steered, and a front wheel 13 is rotatably attached to the lower end of the front fork 12. A handle 34 is attached, a reinforcing plate 35 is attached to the joint between the lower pipes 21 and 22 and the center support frame 24, and left and right rear wheels 14 and 15 are attached to the rear part of the vehicle body frame 11 via a double wishbone suspension 36. It is a thing. Reference numeral 41 denotes a storage box attached to the upper portion of the center support frame 24, and 42 denotes a seat attached to the upper portion of the storage box 41.

  FIG. 2 is a rear view of a motor-driven vehicle according to the present invention. The motor-driven vehicle 10 is a vehicle body frame 11 with electric motor-driven rear wheels 14 and 15 attached via a double wishbone suspension 36. is there.

  The double wishbone suspension 36 has a left upper arm 57 and a right upper arm 58 swingably attached to the body frame 11, specifically, an upper support shaft 56 provided on the underframe 26, and a lower support shaft 61 provided on the underframe 26. The left lower arm 62 and the right lower arm 63 are swingably attached to the left upper arm 57 and the left lower arm 62. The left wheel base 67 is attached to the tips of the left upper arm 57 and the left lower arm 62 via support shafts 65 and 66, and the right upper arm 58 and the right lower arm 63 are attached. The right wheel base portion 73 is attached to each of the tips via support shafts 71 and 72.

  Further, the double wishbone suspension 36 is provided with a buffer mechanism 75 for preventing an impact from being transmitted from the rear wheels 14 and 15 to the vehicle body frame 11, and an electric motor, which will be described later, is part of the buffer mechanism 75. A loading platform 77 on which a battery 76 serving as a power source is mounted.

  The shock-absorbing mechanism 75 is attached to left brackets 78 and 81 provided on the upper portion of the left lower arm 62 via a support shaft 82 so as to be swingable, and extends substantially upward, and on the upper end of the left link 83. A left bell crank 86 swingably connected via a support shaft 84 and a right bracket 87, 88 provided on the upper portion of the right lower arm 63 are swingably attached via a support shaft 91 and extended substantially upward. The right link 92, the right bell crank 94 swingably attached to the upper end of the right link 92 via a support shaft 93, and the left bell crank 86 and the right bell crank 94 are connected to the upper end of the right link 92 via support shafts 96 and 97, respectively. A left and right connecting member 101 swingably attached to a rear portion on the underframe 26 side via a support shaft 98 for connection, and a left bell crank 8 Support shaft 102 provided in, and a damper 104 that passes between the support shaft 103 provided on the right bell crank 94.

  The left bell crank 86 includes a first arm portion 86 a connected to the left and right connecting members 101 and a second arm portion 86 b connected to the shock absorber 104. The right bell crank 94 includes a first arm portion 94 a connected to the left and right connecting members 101 and a second arm portion 94 b connected to the shock absorber 104.

  In the figure, reference numeral 111 denotes a stroke limiting mechanism provided at a connecting portion between the left and right bell cranks 86 and 94 and the left and right connecting members 101, which regulates the vertical stroke of the rear wheels 14 and 15, 101 comprises an arc-shaped elongated hole 112 provided on both sides of 101, and stopper pins 113 that are passed through the arc-shaped elongated hole 112 and attached to the left and right bell cranks 86 and 94, respectively.

FIG. 3 is a side view of the main part showing the rear part of the motor-driven vehicle according to the present invention.
The underframe 26 has a rising portion 121 inclined rearward and upward, a front-rear extension portion 122 extending substantially horizontally from the rear end of the rising portion 121, and a front-rear extension portion 122. A lower extension portion 123 that is curved from the rear end and extends downward, a front support bracket 125 is attached to the lower portion of the rising portion 121, and a rear support cylinder member 126 is attached to the lower end portion of the lower extension portion 123. The lower support shaft 127 is attached to the front support bracket 125 and the rear support cylinder member 126, and a part of the double wishbone suspension 36 is attached to the lower support shaft 127.

  That is, the left lower arm 62 and the right lower arm 63 are attached to the lower support shaft 127 so as to freely swing up and down. Specifically, the front mounting portion 62a and the rear mounting portion 62b of the left lower arm 62 and the front mounting portion 63a and the rear mounting portion 63b of the right lower arm 63 are rotatably mounted on the lower support shaft 127.

  After the lower support shaft 127 is inserted into the rear support cylinder member 126, the lower support shaft 127 is sequentially inserted into the rear mounting portion 63b, the rear mounting portion 62bb, the front mounting portion 63a, and the front mounting portion 62a, and integrated with the front support bracket 125. Assemble by screwing into the nut 128 attached to the.

  The upper support shaft 131 for mounting the left upper arm 57 and the right upper arm 58 of the double wishbone suspension 36 so as to freely swing up and down is an upper front support bracket 132 and an upper rear support bracket that are mounted side by side on the upper portion of the underframe 26. The bolts are mounted between the upper and lower support brackets 132 and are screwed into the nuts 134 that are integrally attached to the upper rear support bracket 133. In addition, 57a is a left mounting portion provided on the left upper arm 57 for rotatably mounting on the upper support shaft 131, and 58a is a right mounting portion provided on the right upper arm 58 for rotatably mounting on the upper support shaft 131.

  The shock-absorbing mechanism 75 is provided in front of and behind the cargo bed 77, and the cargo bed 77 is attached to each of the left and right connecting members 101 (see FIG. 2) of the shock-absorbing mechanism 75 with bolts 136 and 136 (see FIG. 2).

  A support shaft 98A that supports the left and right connecting members 101 (here, of the two support shafts 98, the support shaft 98 on the vehicle front side is the support shaft 98A), a front bracket 137 attached to the underframe 26, It is a bolt attached to the upper front support bracket 132 and is fixed by screwing into a nut 138 integrally attached to the upper front support bracket 132 after passing through a mounting hole provided in the front bracket 137. Reference numeral 141 denotes a collar placed on the support shaft 98A.

  A support shaft 98B that supports the left and right connecting members 101 (here, of the two support shafts 98, the support shaft 98 on the vehicle rear side is a support shaft 98B), a rear bracket 151 attached to the underframe 26, It is a bolt attached to the upper rear support bracket 133 and is fixed by screwing into a nut 152 integrally attached to the upper rear support bracket 133 after passing through a mounting hole provided in the rear bracket 151. Reference numeral 153 denotes a collar placed on the support shaft 98B.

  In the drawing, when the under frame 26 swings left and right with respect to the left and right connecting members 101 (that is, the vehicle body frame 11 swings left and right with respect to the left lower arm 62 and the right lower arm 63 connected to the left and right connecting members 101). The nighthard damper, which generates an elastic force that tries to reverse the swing when it was moved), was omitted.

  The knighthard damper protrudes in a radial direction from a split case attached to the underframe 26 side and the collars 141 and 153 that are integrally attached to the left and right connecting members 101 and are rotatably fitted to the support shafts 98A and 98B. And a plurality of columnar rubbers interposed between the recesses between the protruding members and the case.

  If the case is inclined together with the vehicle body frame 11 with respect to the protruding member, the columnar rubber sandwiched between the protruding member and the case is compressed, and an elastic force is generated to return the vehicle body frame 11 to an upright position.

FIG. 4 is a cross-sectional view showing the rear wheel mounting portion of the motor-driven vehicle according to the present invention, and shows that the rear wheel 14 is mounted on the left wheel base 67. The right wheel base 73 (see FIG. 2) and the rear wheel 15 (see FIG. 2) have the same structure as the left wheel base 67 and the rear wheel 14, and a detailed description thereof will be omitted.
The left wheel base 67 is mounted with a stator 182 constituting an electric motor 181, a brake shoe support pin 185 and a brake shoe drive shaft 186 constituting a drum brake device 184, and an axle 188 of a rear wheel 14 made up of stud bolts. It is a member. Reference numerals 191 and 191 denote mounting holes for attaching the left upper arm 57 (see FIG. 2) and the left lower arm 62 (see FIG. 2), and 192 is a mudguard formed continuously in the circumferential direction.

The stator 182 is a component attached to the left wheel base 67 with a plurality of bolts 193, and is composed of magnetic cores 182a... And coils 182b wound around these magnetic cores 182a.
The brake shoe support pin 185 is a component that serves as a swing shaft for two arcuate brake shoes (not shown).

  The brake shoe drive shaft 186 is a component having a cam 194 at one end and a lever member 195 attached to the other end. For example, an end portion of the lever member 195 via a wire by operating a brake lever or a brake pedal. A rotational force is applied to 196, the cam 194 is rotated via the brake shoe drive shaft 186, the brake shoe is moved radially outward by this cam 194, pressed against a brake drum, which will be described later, and the rear wheel 14 is moved. Brake. Reference numeral 197 denotes a return spring that returns the rotated brake shoe drive shaft 186 to its original rotational position by generating an elastic force in a direction opposite to the direction in which the brake shoe drive shaft 186 is rotated for braking.

  The rear wheel 14 includes a wheel 202 rotatably attached to an axle 188 via bearings 201 and 201, and a tire 203 attached to the wheel 202, and an electric motor 181 is disposed radially inward of the rim portion 205 of the wheel 202. And the brake drum 208 constituting the drum brake device 184 is integrally molded outside the diameter of the hub portion 207 of the wheel 202. Reference numeral 209 denotes a retaining ring for fixing the rotor 206 to the wheel 202.

The rotor 206 includes permanent magnets 211... And a magnet holder 212 that holds these permanent magnets 211.
When electric power is supplied from a power source (not shown) to the coil 182b of the stator 182 described above, the rotor 206 rotates and the rear wheel 14 rotates.

  Here, reference numeral 215 denotes a first collar fitted to the axle 188 in order to keep a constant distance between the bearings 201, 201, and 216 denotes a second collar fitted to the axle 188 to make contact with one bearing 201, 217 denotes a hub portion 207. A seal member 218 provided between the end of the second collar 216 and a second collar 216 is a wheel nut screwed into the front end of the axle 188 in order to attach the drive wheel 253 to the axle 188.

Next, the operation of the motor-driven vehicle 10 described above will be described.
FIG. 5 is an operation diagram for explaining the operation of the motor-driven vehicle according to the present invention, and shows that the motor-driven vehicle 10 swings left and right.
For example, when the motor-driven vehicle 10 turns a corner, if the driver tilts the body in the turning direction, here, the vehicle right side, the body frame 11 tilts to the vehicle right side. When the vehicle body frame 11 tilts to the right of the vehicle, the vehicle body frame 11, more specifically, the left upper arm 57 and the right upper arm 58 connected to the under frame 26 move substantially parallel to the vehicle right. Accordingly, the rear wheels 14 and 15 are inclined to the right side of the vehicle, that is, in the turning direction (camber angle in the turning direction is generated), so that the motor-driven vehicle 10 can be easily turned.

  At this time, since the left and right connecting members 101 also move substantially parallel to the right side of the vehicle as the underframe 26 tilts, the loading platform 77 attached to the left and right connecting members 101 only tilts slightly, and the battery 76 is securely stored. Can be kept.

  As described above with reference to FIGS. 2 and 3, the present invention firstly includes a double body comprising a left upper arm 57 as an upper arm, a right upper arm 58, a left lower arm 62 as a lower arm, and a right lower arm 63 at the rear of the body frame 11. A three-wheeled vehicle or a four-wheeled vehicle in which a wishbone suspension 36 is attached, and rear wheels 14 and 15 driven by an electric motor 181 disposed inside the wheel 202 are rotatably attached to the front end side of the double wishbone suspension 36. Vehicle 10 (see FIG. 1), a double wishbone suspension 36, a lower support shaft 127 as a common swing shaft with left and right upper arms 57 and 58 and left and right lower arms 62 and 63 attached to the vehicle body frame 11, respectively. It is assumed that the car is supported by the upper support shaft 131. The frame 11, characterized in that the swingable to the left and right with respect to the upper arm 57, 58 and lower arm 62, 63.

  Since the body frame 11 of the motor-driven vehicle 10 can swing left and right with respect to the upper arms 57 and 58 and the lower arms 62 and 63, for example, the body is tilted toward the side where the driver turns while the motor-driven vehicle 10 is turning. By moving the center of gravity, the vehicle body frame 11 can be tilted toward the turning side, and the turning performance can be greatly improved even if the treads of the left and right rear wheels 14, 15 are small.

2 and 4, the present invention is provided with a left wheel base 67 and a right wheel base 73 as wheel support portions that are swingable at the respective ends of the upper arms 57 and 58 and the lower arms 62 and 63 as described in FIGS. When the wheel 202 is rotatably mounted on these wheel support portions 67 and 73, the upper arms 57 and 58 are disposed above the axles 188 of the rear wheels 14 and 15, and the lower arms 62 and 63 are moved to the rear. It is arranged below the wheels 14 and 15, and the upper arm 57 and 58 and the lower arm 62 and 63 are attached to the wheel support portions 67 and 73 from the outer diameter of the stator 182 of the electric motor 181 provided on the wheel support portions 67 and 73. Is also provided inside in the radial direction.
It becomes possible to arrange the vehicle body connected to the wheel support portions 67 and 73 at a lower position, and the stability of the motor-driven vehicle 10 can be improved.

  Thirdly, according to the present invention, a left link 83 and a right link 92 as links are attached to the left and right upper arms 57 and 58 or the left and right lower arms 62 and 63, respectively, and swings freely at the tips of the links 83 and 92, respectively. A left bell crank 86 and a right bell crank 94 as bell cranks are attached to each other, and the first arm portions 86a and 94a provided on the left and right bell cranks 86 and 94 are connected by a left and right connecting member 101 as a connecting member. The center portion of the left and right connecting members 101 is swingably attached to the vehicle body frame 11, and a shock absorber 104 is passed between second arm portions 86b and 94b provided on the left and right bell cranks 86 and 94, respectively.

  When the body frame 11 swings left and right, the left and right upper arms 57 and 58 move substantially parallel to the left and right with respect to the left and right lower arms 62 and 63, so that the left and right rear wheels are interposed via the wheel support portions 67 and 73. 14 and 15 tilt in the direction in which the body frame 11 swings, that is, a camber angle is generated in the rear wheels 14 and 15, so that the motor-driven vehicle 10 can be turned easily.

Fourth, the present invention is characterized in that a cargo bed 77 is attached to the left and right connecting members 101.
When the left and right upper arms 57 and 58 are moved substantially parallel to the left and right as the vehicle body frame 11 is tilted to the left or right, the left and right connecting members 101 and the loading platform 77 also move substantially in parallel. Can hardly hold the object mounted on the loading platform 77.

Fifth, the present invention is characterized in that a battery 76 is mounted on a loading platform 77.
Since the loading platform 77 is on the non-oscillating side, the battery 76 can be reliably held.

  In this embodiment, as shown in FIG. 3, the buffer mechanism 75 is provided in front of and behind the loading platform 77. However, the present invention is not limited to this, and the buffer mechanism 75 may be provided only in front (or behind) the loading platform 77. Good. At this time, the rear part (or front part) of the cargo bed 77 may be attached to the collar 153 (or the collar 141) that is rotatably supported on the underframe 26 side.

  The motor-driven vehicle of the present invention is suitable for tricycles and four-wheel vehicles.

It is a side view of the motor drive vehicle concerning the present invention. It is a rear view of the motor drive vehicle concerning the present invention. It is a principal part side view which shows the rear part of the motor drive vehicle which concerns on this invention. It is sectional drawing which shows the rear-wheel attachment part of the motor drive vehicle which concerns on this invention. It is an operation | movement figure explaining the effect | action of the motor drive vehicle which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motor drive vehicle, 11 ... Body frame, 14, 15 ... Drive wheel (rear wheel), 36 ... Double wishbone suspension, 57, 58 ... Upper arm (left upper arm, right upper arm), 62, 63 ... Lower arm (left) Lower arm, right lower arm), 67, 73 ... wheel support (left wheel base, right wheel base), 76 ... battery, 77 ... loading platform, 83, 92 ... link (left link, right link), 86, 94 ... bell crank (Left bell crank, right bell crank), 86a, 94a ... first arm portion, 86b, 94b ... second arm portion, 101 ... connecting member (left / right connecting member), 104 ... shock absorber, 127, 131 ... swing shaft ( (Lower support shaft, upper support shaft), 181 ... electric motor, 182 ... stator, 188 ... axle, 202 ... wheel.

Claims (3)

A tri-wheeled vehicle with a double wishbone suspension consisting of an upper arm and a lower arm attached to the rear part of the body frame, and a driving wheel driven by an electric motor disposed inside the wheel is rotatably attached to the tip side of the double wishbone suspension. In vehicles such as automobiles,
The double wishbone suspension supports left and right upper arms and left and right lower arms with a common swing shaft attached to the body frame, respectively, and the body frame can swing left and right with respect to the upper arm and lower arm .
Each of the left and right upper arms or the left and right lower arms is attached with a swingable link, and a bell crank is attached to the tip of each of the links so as to be swingable. A connection member is provided between the first arm portions provided on each of the left and right bell cranks. mounted for swinging the central portion of the connecting member to the body frame together with the coupling, a motor driven vehicle, characterized in that the buffer was passed between the second arm portion provided on each of the left and right bell crank. The motor-driven vehicle according to claim 1, wherein a cargo bed is attached to the connecting member. The motor-driven vehicle according to claim 2 , wherein the cargo bed is mounted with a battery.

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