JP3469067B2 - Electric auxiliary single wheel carrier - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric auxiliary one-wheeled vehicle equipped with a motor for assisting human power. 2. Description of the Related Art Wheeled single-wheeled vehicles called "cats" (cats) are used in various places such as construction sites and agricultural lands because of their small size and small turnability. However, in such a single-wheeled transport vehicle having a simple configuration, a heavy burden is imposed on an operator who carries heavy objects or climbs an uphill. In order to reduce the burden on the worker, it is conceivable to make the single-wheeled transport vehicle run on its own power. As a self-propelled transport vehicle, there is, for example, Japanese Utility Model Laid-Open No. 2-108679 "Single-wheeled transport vehicle with motor". According to FIG. 1 of the official gazette, the above-mentioned one-wheeled vehicle with a motor is provided with an internal combustion engine or a battery type electric motor 1.
And drives a single tire 8 via the speed reducer 2 and the power transmission chain 3. These internal combustion engine or battery-type electric power machine 1, reduction gear 2, and power transmission chain 3 are below the carrier 7. [0004] Since the one-wheeled vehicle with a power unit is a self-propelled vehicle, the labor required to carry heavy objects and climb uphills can be reduced. On the other hand, it is not as mobile and easy to use as a wheeled single wheel carrier. At construction sites and greenhouses, the work space is narrow and the road surface is uneven, so it is necessary to frequently adjust the traveling speed and traveling direction of the unicycle. For this purpose, there is room for improvement in the above-mentioned one-wheeled vehicle with a motor. Also,
The above-mentioned one-wheeled vehicle with a motor is limited in installation space.
The reduction gear 2 is arranged behind the tire 8. Since the weight of the speed reducer 2 acts on the handle 9 during traveling, the lifting force of the handle 9 is relatively large, and the burden on the operator increases, and there is room for improvement. [0005] Therefore, an object of the present invention is to reduce the burden on the operator and to exhibit the mobility and ease of use of a wheeled single wheeled vehicle even in a narrow work area.
It is an object of the present invention to provide a single wheel carrier technology. In order to achieve the above object, a first aspect of the present invention is to mount a single wheel substantially at the center of a vehicle body frame in a vehicle width direction, and attach a battery, a motor and a motor to the vehicle body frame. The power transmission mechanism that transmits the output of the vehicle to the wheels is installed, the operating handle is extended backward from the body frame, the carrier is mounted on the upper part of the body frame, and the auxiliary power is generated by the motor according to the manual operation force, and this auxiliary It is an electric auxiliary single wheel carrier that assists human power with power,
A first reduction mechanism for reducing the rotation of the motor, a second reduction mechanism for reducing the output rotation of the first reduction mechanism and transmitting it to the axle of the wheels, a first reduction mechanism and a second reduction mechanism;
In a transmission shaft connecting the reduction mechanism constitute the second reduction gear
Move the structure to the center of the vehicle width, and center the second speed reduction mechanism on the axle.
To the center of the
The drive shaft is extended, and the first reduction mechanism is arranged on the extension of the drive shaft.
And the motor is disposed above and behind the axle . (1) By pushing the operating handle while lifting it, the electric auxiliary single-wheel carrier can be run by human power alone. Further, an auxiliary power can be generated by a motor in accordance with the pressing force of the operation handle, and the auxiliary power can be assisted by human power. As described above, by pressing the operation handle, the operator can cause the electric auxiliary single-wheeled vehicle to travel only by human power or to travel by applying auxiliary power. (2) The power transmission mechanism is such that the center of the second reduction mechanism is located in the axle.
Arranged in line with the center, and the transmission shaft from the second reduction mechanism
And arrange the first reduction mechanism on the extension of this transmission shaft.
Since the motor is disposed above and behind the axle, the speed reduction mechanism is separated into the first speed reduction mechanism and the second speed reduction mechanism, and the speed reduction ratio of the first speed reduction mechanism is small by the amount of the separation. The first reduction mechanism is smaller and lighter as the reduction ratio is smaller. For this reason, the electric auxiliary single-wheel
As for the weight balance in the longitudinal direction (front and rear) of the carriage, the rear on the operation handle side is lighter by the amount of the first reduction mechanism being lighter.
Become. Therefore, the force for lifting the operation handle is small, and the handle operation force is also small. Moreover, the weight balance in the longitudinal direction of the single-wheel electric vehicle can be set to an optimal state. Further, since the power transmission mechanism is a shaft drive type, the ground height of the carrier can be reduced. Embodiments of the present invention will be described below with reference to the accompanying drawings. Note that "before", "after",
“Left”, “right”, “up”, and “down” follow the direction as seen from the operator, and Fr indicates the front side, Rr indicates the rear side, L indicates the left side, and R indicates the right side. Also, the drawings should be viewed in the direction of reference numerals. FIG. 1 is a perspective view of an electric auxiliary single wheel carrier according to the present invention. The electric auxiliary single wheel carrier 1 has a single wheel 3, two batteries 4 </ b> L, 4 </ b> R, a motor 5, and a power transmission mechanism 6 for transmitting the output of the motor 5 to the wheels 3. The left and right operation handles 7L and 7R are extended, the carrier 8 is mounted on the upper part of the body frame 2, auxiliary power is generated by the motor 5 according to the manual operation force, and the auxiliary power assists the human power. It is a walking cart. The left and right operation handles 7L, 7R are bar handles extending rearward and upward from the vehicle body frame 2, and these bar handles have grips 9L, 9R attached to their ends. The right grip 9R is a sliding grip. The right operation handle 7R includes a movement amount detection unit 11 that detects a movement amount of the grip 9R. Note that the slide grip 9R and the movement amount detection unit 11 may be attached to the left operation handle 7L. Also, batteries 4L, 4R
Is a sealed battery. In the figure, reference numeral 12 denotes a brake lever. FIG. 2 is a side view of the electric auxiliary single wheel carrier according to the present invention. The vehicle body frame 2 has a control unit 22 mounted on a hanger 21 and a key switch 24 mounted on a mounting plate 23. The control unit 22 is an electric control unit that controls the motor 5 according to the output of the movement amount detection unit 11. The left and right batteries 4L and 4R are mounted on the battery holders 41L and 41R of the vehicle body frame 2, respectively.
The upper corners of these batteries 4L and 4R are
And hook bolts 47, 47 fixed to the body frame 2. The power transmission mechanism 6 includes a first reduction mechanism 50 connected to the motor 5, a transmission shaft 61 connected to the first reduction mechanism 50, and a second reduction mechanism 80 connected to the transmission shaft 61. This is a drive transmission mechanism. The first reduction mechanism 50 reduces the rotation of the motor 5, the transmission shaft 61 connects the first reduction mechanism 50 and the second reduction mechanism 80, and the second reduction mechanism 80 The output rotation of the first reduction mechanism 50 is further reduced and transmitted to the axle 101. The axle 101 supports the wheels 3. The left and right batteries 4L and 4R, the motor 5 and the power transmission mechanism 6 are located in a space S surrounded by a body frame 2 composed of a pipe frame. The center C of the batteries 4L and 4R is located in front of the axle 101, and the motor 5 is located behind and above the axle 101. The power transmission mechanism 6 includes a second reduction mechanism 80 concentric with the axle 101, and a transmission shaft 61 extends rearward and upward from the second reduction mechanism 80, and a first reduction mechanism 50 extends on the extension of the transmission shaft 61. is there. As described above, the power transmission mechanism 6 has a configuration in which the speed reduction mechanism is separated (distributed) into the first speed reduction mechanism 50 and the second speed reduction mechanism 80. Reduction ratio is small. The first reduction mechanism 50 is smaller and lighter as the reduction ratio is smaller. Second reduction mechanism 80
Is concentric with the axle 101, so that it does not affect the weight balance in the longitudinal direction of the vehicle body (electrically assisted single-wheeled vehicle 1) with the axle 101 as a fulcrum. That is, power transmission
The structure 6 is, as apparent from the above description, a second reduction mechanism.
The center of 80 is aligned with the center of axle 101 and the second
The transmission shaft 61 extends rearward and upward from the speed reduction mechanism 80, and this transmission
The first reduction mechanism 50 is arranged on the extension of the drive shaft 61, and the motor
5 is located above and behind the axle 101, thereby reducing
The second speed reduction mechanism 80 can be separated from the speed mechanism 50.
You. As a matter of course, the second speed reduction from the first speed reduction mechanism 50 is performed.
Separated first deceleration as compared with the case where the mechanism 80 is not separated
The mechanism 50 is lighter. Therefore, the axle 101 is used as a fulcrum.
Weight variation before and after the vehicle body (electrically assisted single wheel carrier 1)
The operation is performed as much as the first speed reduction mechanism 50 becomes lighter.
The rear of the handles 7L, 7R is lighter. Therefore, the force for lifting the operation handles 7L, 7R is small, and the handle operation force is also small. Since the lifting force and the operating force are small, the burden on the operator can be reduced, the steering feeling is good, and the turning performance is also good. As a result, the maneuverability of the electric auxiliary single wheel carrier 1 is improved. [0015] Battery 4L, the center of gravity G ₁ and 4R which is one of the heavy is in a front portion of a vehicle body, also, the center of gravity G ₂ of the assembly consisting of the motor 5 and the first speed reduction mechanism 50 which is the other heavy object , Located at the rear of the vehicle. The weight balance in the longitudinal direction of the vehicle body with the axle 101 as a fulcrum is approximately 4: 6 between front and rear. In the meantime, in the electric auxiliary single wheel carrier 1, the operator lifts the left and right operation handles 7L and 7R, and runs the vehicle with the vehicle body balanced back and forth. When the weight in the vehicle body longitudinal direction with the axle 101 as a fulcrum is perfectly balanced, the force for lifting the operation handles 7L, 7R may be small. However, when the electric single wheel carrier 1 is stopped, a rotational moment in the lifting direction acts on the operation handles 7L and 7R. For the operator to operate, it is easier to steer if the weight in the longitudinal direction of the vehicle body is balanced so that the rotational moment in the lifting direction is slightly canceled by its own weight. This is why the rear part of the vehicle body is set slightly heavier. In this way, the weight balance in the longitudinal direction of the electric single wheel carrier 1 can be set to an optimum state. If the weight balance is optimal, the force by which the operator lifts the operation handles 7L and 7R may be small, and the handle operation force may be small. Since the lifting force and the operating force are small, the burden on the operator can be reduced, the steering feeling is good, and the turning performance is also good. As a result, the maneuverability of the electric auxiliary single wheel carrier 1 is improved. Further, since the power transmission mechanism 6 is a shaft drive system, unlike the above-described conventional chain drive system or belt drive system, there is no need to adjust the elongation of the chain / belt. Moreover, the cover is unnecessary, the appearance is good,
Hardly affected by work environment such as mud. The hand-operated single-wheeled vehicle including the electric auxiliary single-wheeled vehicle 1 can easily load and unload various loads such as earth and sand, agricultural crops, and building materials. Better. In addition, in order to improve the maneuverability of the single-wheeled transport vehicle, it is preferable that the center of gravity in a state where the load is loaded is low. In order to lower the center of gravity, it is preferable that the ground height of the loading platform 8 be low. In the above-mentioned conventional chain drive system or belt drive system, the ground height of the carrier increases according to the diameter of the sprocket or the pulley. On the other hand, since the power transmission mechanism 6 is of a shaft drive type, the ground height of the bed 8 can be reduced to about the height of the bed of a general hand-operated single wheel carrier. The ground height of the bed 8 is
It is about 400 mm. FIG. 3 is a front view of the electric auxiliary single-wheel carrier according to the present invention, in which the wheels 3 are arranged substantially at the center of the vehicle body frame 2 in the vehicle width direction, and the two batteries 4L, 4R Position, indicating that the second speed reduction mechanism 80 is disposed to the right from the center in the vehicle width direction. The loading platform 8 covers the entire upper surface of the body frame 2 and the left and right loading fences 27.
This is a steel plate base bolted to the front and rear of the body frame 2 together with L and 27R. FIG. 4 is a perspective view of a vehicle body frame according to the present invention. The vehicle body frame 2 is a pipe frame (pipe frame frame) having a substantially rectangular shape in a plan view, including a pair of left and right side members 31L and 31R extending in the vehicle body longitudinal direction and three cross members 32A, 32B and 32C connecting the side members. . Specifically, the left side member 31L includes one upper horizontal member 33 extending in the longitudinal direction of the vehicle body and a lower member 34 joined to a lower portion of the upper horizontal member 33. The upper horizontal member 33 has an operation handle 7L extending from the rear end to the rear upper side. The right side member 31R has the same structure as the left side member 31L. The lower member 34 is a generally U-shaped upper open member in a side view. More specifically, the U-shaped member is, when viewed from the side, a front vertical portion 34a at the front end and the front vertical portion 34a.
a, a horizontal portion 34b extending horizontally rearward from the lower end portion, a leg portion 34c bent downward in a substantially V shape from a rear end portion of the horizontal portion 34b, and extending upward from a rear upper portion of the leg portion 34c. And a rear upright portion 34d. The structure of the lower member 34 will be described in more detail. (1) The upper end of the front vertical portion 34a is slightly closer to the center than the upper horizontal member 33, and the front cross member 3
2A, (2) the horizontal portion 34b extends along the upper horizontal member 33, (3) the V-shaped leg 34c extends outward in the vehicle width direction, and (4) the upper end of the rear upright portion 34d. Is
The upper horizontal member 33 is joined to the rear part. The leg portion 34c plays a role of a stand that makes the electric auxiliary single wheel carrier 1 stand alone. The relationship between the left and right horizontal portions 34b, 34b and other members is as follows. (1) The battery holders 41L, 41R are mounted and fixed on the front ends of the left and right horizontal portions 34b, 34b and on the upper surface. (2) The axle brackets 42L, 42R are fixed to the lower surfaces of the left and right horizontal portions 34b, 34b at positions overlapping the rear portions of the battery holders 41L, 41R. (3) The first deceleration mechanism brackets 44L, 44R are fixed to the rear end portions of the left and right horizontal portions 34b, 34b and to the upper surface. FIG. 5 is a cross-sectional view of the power transmission mechanism according to the present invention, and shows the power transmission mechanism 6 viewed from the direction of the arrow 5 in FIG.
1 shows a cross-sectional structure. First reduction mechanism 50 of power transmission mechanism 6
Is a first small gear 51 connected to the output shaft 5a of the motor 5.
A first large gear 52 meshing with the first small gear 51;
One-way clutch (one-way clutch) 5 for large gear 52
3, a second small gear 55 connected to the intermediate shaft 54, a second large gear 56 meshing with the second small gear 55, and a bearing rotatably supporting the second large gear 56. 57, a first housing 58 for housing these gears 51, 52, 55, 56, an intermediate shaft 54, a bearing 57, and the like, and a lid 59. Intermediate shaft 5
Reference numeral 4 denotes a shaft that supports the first large gear 52 and the second small gear 55. More specifically, the first reduction mechanism 50 is configured such that the motor 5 is mounted on the first housing 58, and the output shaft 5a of the motor 5
And the second large gear 52 are arranged concentrically, and the rotation of the motor 5 is reduced by the combination of the gears 51, 52, 55, 56 formed of spur gears. The second large gear 56 has a rotation center spline-fitted to the transmission shaft 61. The one-way clutch 53 is a clutch capable of transmitting power only from the motor 5 to the axle 101. Specifically, power transmission from the first large gear 52 to the intermediate shaft 54 is possible, and power transmission from the intermediate shaft 54 to the first large gear 52 is not possible. Since the one-way clutch 53 is provided in the first reduction mechanism 50 in which the gear rotates at a relatively high speed, the transmission torque can be small, and the one-way clutch 53 can be reduced in size and cost. In the figure, 62 to 65 are bearings,
Reference numeral 66 denotes the first reduction mechanism brackets 44L, 44R.
(See FIG. 4). B1 is a first small gear fixing bolt, and B2 is a lid closing bolt. By the way, the first speed reduction mechanism 50 includes the intermediate shaft 5
A brake mechanism 70 for braking the rotation of No. 4 was provided on the outside. The brake mechanism 70 is a combination of a brake cover 71 attached to the lid 59 with bolts B3 and a brake drum 77 attached to one end of the intermediate shaft 54. The detailed structure will be described with reference to FIG. On the other hand, the second reduction mechanism 80 includes a small bevel gear 81 spline-fitted to a transmission shaft 61 extending in the longitudinal direction of the vehicle body, a large bevel gear 82 connected to the axle 101, and these small and large bevel gears 81, 82. This is a one-stage speed reduction mechanism for a gear, comprising a second housing 83 to be housed. The one-stage speed reduction mechanism changes the direction of the auxiliary power transmitted from the transmission shaft 61 and transmits the auxiliary power to the axle 101. Second
The housing 83 includes two housing portions 83a and 83b.
Are combined in a box shape, and a plurality of bolts B4 (...) Are shown on the right axle bracket 42R (see FIG. 4).
same as below. ). The right axle bracket 42R is for mounting the second reduction mechanism 80, and the left axle bracket 42L is for mounting the bearing portion 90. The axle 101 is supported by the second reduction mechanism 80 and the shaft portion 90. . Specifically, the right axle bracket 42R rotatably supports the right end of the axle 101 via a bearing holder 84 and a bearing 85 housed in the second housing 83. Also, the left axle bracket 4
2L rotatably supports the left end of the axle 101 via a bearing 92 housed in the third housing 91. Since the wheel 3 and the axle 101 are connected by the pin 102, they can be integrally rotated. In the figure, reference numeral 86 denotes a bearing holder, 87 denotes a bearing, 8
8 is a seal holder, 89 is an oil seal, B5 is a flat washer, B6 is a bearing set bolt, B7 is a seal holder mounting bolt, B8 is a third housing mounting bolt, B9 is a flat washer, and B10 is a bearing set bolt. is there. FIG. 6 is an exploded perspective view of the brake mechanism according to the present invention. The brake mechanism 70 is an expanding drum brake, and includes a brake cover 71, brake shoes 73, 73 with brake pads attached to the brake cover 71 via a bush 72, and a cam 74 for expanding the diameter of the brake shoes 73, 73. Cam lever 7 for rotating cam 74
5, a brake cable 76 for pulling a cam lever 75,
Brake drum 7 surrounding the brake shoes 73, 73
7 and tension springs 78, 78 for reducing the diameter of the brake shoes 73, 73. The brake cable 76 is shown in FIG.
Connected to the brake lever 12. The brake drum 77 is mounted on the intermediate shaft 54 shown in FIG. 5, and the other brake cover 71 and the brake shoes 73, 73 are mounted on the lid 59. The drum 77 can be braked to stop the electric auxiliary single wheel carrier 1. Further, since the brake mechanism 70 is attached to the first reduction mechanism 50 in which the gear rotates at a relatively high speed, the braking force can be reduced, and the size and cost of the brake mechanism 70 can be reduced. Returning to FIG. 3, the electric auxiliary single wheel carrier 1 has a bank angle on the left side of the vehicle body θ1 and a bank angle on the right side of the vehicle body θ2 around the wheels 3. The left bank angle θ1 is determined by the position of the lower corner (point P1) on the left axle bracket 42L. On the other hand, the right bank angle θ2 is also desired to be equal to or larger than the left bank angle θ1. For this purpose, the position (point P2) of the lower corner in the second reduction mechanism 80 is set to the line BL of the bank angle θ1.
It is set closer to the center of the vehicle width. Since the second speed reduction mechanism 80 is located inward of the line BL, the right bank angle θ2 is larger than the left bank angle θ1. In general, a single-wheeled transport vehicle is required to improve the turning performance so as to make a small turn. For that purpose, the larger the bank angle is, the better. The right bank angle θ2 is set to be equal to or larger than the left bank angle θ1 by moving the second reduction mechanism 80 toward the center of the vehicle width. Therefore, the electric auxiliary single-wheel carrier 1 has good turning performance because the left and right bank angles θ1 and θ2 are sufficiently large. Next, the operation of the motor 5 and the power transmission mechanism 6 will be described with reference to FIG. The motor 5 outputs a predetermined auxiliary power based on a control signal of the control unit 22 in FIG. The auxiliary power from the output shaft 5a is supplied to the first small gear 51 → the first large gear 52 → the one-way clutch 53 → the intermediate shaft 54 → the second
Wheel 3 in the path of small gear 55 → second large gear 56 → transmission shaft 61 → small bevel gear 81 → large bevel gear 82 → axle 101
To drive the wheels 3. Next, the operation of the electric auxiliary single wheel carrier 1 will be described with reference to FIG.
It will be described based on. FIGS. 7A and 7B are operation diagrams of the electric auxiliary single-wheel carrier according to the present invention. When the electric auxiliary single wheel carrier 1 loaded with a lightweight object is run on flat ground, the force F of pressing and holding the grip 9R is small. For this reason, since the movement amount of the grip 9R is small, the output of the movement amount detection unit 11 is also small. Therefore, the control unit 22 does not issue a control signal to the motor 5. As a result, the electric single-wheel carrier 1 can be run only by human power. The first reduction mechanism 50
Since the one-way clutch 53 (see FIG. 5) is built in the motor, the rotational force of the wheels 3 is not transmitted to the motor 5. As shown in (a), when the electric auxiliary single-wheeled vehicle 1 loaded with heavy objects is run or the electric auxiliary single-wheeled vehicle 1 is driven uphill, the grips 9L and 9R are gripped and pushed. . The force F to hold and push the grip 9R is large. When the pressing force F of the operator (operator) M who operates is equal to or more than a predetermined value, the grip 9R in (b) has a corresponding movement amount. 22 issues a control signal to the motor 5. The output of the movement amount detection unit 11 changes according to the pressing force F, and the control unit 22 controls the motor 5 so as to output the corresponding auxiliary power. For this reason, since the human power is assisted by the auxiliary power, the labor is reduced. As described above, the worker M holds the grips 9L and 9L.
By gripping and pushing R, the electric auxiliary single-wheel carrier 1 can be driven by human power alone, or can be driven by receiving auxiliary power. That is, the worker M holds the grips 9L and 9R regardless of whether (1) the electric auxiliary single-wheeled vehicle 1 travels with only human power or (2) the auxiliary power is traveled. It is only necessary to continue a single operation of grasping and pushing. Since the auxiliary power can be adjusted only by pushing the grips 9L and 9R, no special operation for adjusting the auxiliary power is required. For this reason, the operational feeling (operation feeling) is improved, the operability is enhanced, and the operational burden is light. In particular, since the electric auxiliary unicycle 1 is a unicycle, both hands cannot be released from the left and right grips 9L and 9R during transportation. Even when it is desired to receive auxiliary power while the electric auxiliary single-wheeled vehicle 1 is traveling by hand, the worker M does not need to perform any special operation. It is only necessary to continue the push operation similar to that of “cat car”). For this reason, the transport operation is extremely easy. As described above, the electric auxiliary single-wheeled transport vehicle 1 has a small turn like a conventional hand-operated single-wheeled transport vehicle, has good mobility even in a small work area, and is easy to use. Moreover,
Even when carrying heavy objects or climbing uphill, the burden on the worker M is small. Further, the operation burden of the worker M is light. In the above embodiment, the gears of the first and second reduction mechanisms 50 and 80 are not limited to spur gears and bevel gears. In addition, the one-way clutch 53 and the brake mechanism 70 may have a configuration provided in the first reduction mechanism 50, and the mounting position is arbitrary. According to the present invention, the following effects are exhibited by the above configuration. (1) An auxiliary power is generated by a motor according to the manual operation force, and the auxiliary power assists the human power.
The unicycle transporter can reduce the burden on the worker and can exhibit mobility and ease of use like a hand-operated unicycle even in a small work area. (2) The power transmission mechanism of the electric auxiliary single-wheel carrier is a shaft drive type mechanism comprising first and second reduction mechanisms and a transmission shaft connecting the first and second reduction mechanisms. The auxiliary power of the motor is the first reduction mechanism, the transmission shaft, the second
It is transmitted to the axle via the speed reduction mechanism. That is, the power transmission mechanism is arranged such that the center of the second reduction mechanism is aligned with the center of the axle.
And extend the transmission shaft rearward and upward from the second reduction mechanism.
The first reduction mechanism is arranged on the extension of the transmission shaft, and the motor is connected to the axle.
, The speed reduction mechanism is separated into a first speed reduction mechanism and a second speed reduction mechanism, and the speed reduction ratio of the first speed reduction mechanism is small by the amount of the separation. The first reduction mechanism is smaller and lighter as the reduction ratio is smaller. others
The longitudinal direction of the electric auxiliary single-wheeled carrier, with the axle as the fulcrum
As for the weight balance of (before and after), the rear on the operation handle side becomes lighter by the amount by which the first reduction mechanism becomes lighter . Therefore,
The lifting force of the operating handle is small, and the operating force of the handle is also small. Since the lifting force and operating force are small,
The burden on the worker can be reduced, the steering feeling is good, and the turning performance is good. As a result, the maneuverability of the electric auxiliary single wheel carrier is improved. Moreover, the weight balance in the longitudinal direction of the single-wheel electric vehicle can be set to an optimal state. With the optimal weight balance, the maneuverability of the electric auxiliary single wheel carrier is improved. Furthermore, because the power transmission mechanism is a shaft drive system, compared to a chain drive system or a belt drive system,
The ground height of the bed can be reduced. For this reason, the center of gravity in a state where the load is loaded is lowered, so that the maneuverability is improved. Moreover, the work of loading and unloading the load is easy. Sa
In addition, the second speed reduction mechanism was moved toward the center of the vehicle width.
The electric auxiliary single wheel carrier has a sufficiently large bank angle.
And the turning performance is good.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electric auxiliary single wheel carrier according to the present invention. FIG. 2 is a side view of an electric auxiliary single wheel carrier according to the present invention. FIG. 3 is an electric auxiliary single wheel according to the present invention. FIG. 4 is a perspective view of a vehicle body frame according to the present invention; FIG. 5 is a sectional view of a power transmission mechanism according to the present invention; FIG. 6 is an exploded perspective view of a brake mechanism according to the present invention; Action diagram of electric auxiliary single-wheel carrier according to the present invention [Description of reference numerals] 1 ... electric auxiliary single-wheel carrier, 2 ... body frame, 3 ... wheels, 4L, 4R ... battery, 5 ... motor, 6 ... power transmission mechanism, 7L, 7R: operation handle, 8: carrier, 50: first reduction mechanism, 53: one-way clutch, 61: transmission shaft, 7
0: brake mechanism, 80: second reduction mechanism, 101: axle. M: operator (operator).

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-47475 (JP, A) JP-A-3-100568 (JP, U) JP-A-52-76057 (JP, U) (58) Investigation Field (Int. Cl. ⁷ , DB name) B62B 1/00

Claims (1)

(1) A single wheel is mounted substantially at the center of a vehicle body frame in a vehicle width direction, and a battery, a motor, and a power transmission mechanism for transmitting an output of the motor to the wheel are mounted on the vehicle body frame. Attach, extend the operation handle from the body frame to the rear, attach the carrier to the upper part of the body frame, generate auxiliary power by the motor according to the manual operation force, and use this auxiliary power to assist the human power An auxiliary single-wheel carrier, wherein the power transmission mechanism includes a first reduction mechanism that reduces the rotation of a motor, a second reduction mechanism that reduces the output rotation of the first reduction mechanism and transmits the output rotation to an axle of the wheel, Ri Do and a transmission shaft for connecting the these first reduction mechanism and a second reduction mechanism, asked the second reduction mechanism in the vehicle width center side, the second reduction gear
The center of the structure is aligned with the center of the axle, and the second
The transmission shaft extends rearward and upward from the speed reduction mechanism, and the transmission shaft
A first reduction mechanism on the extension of the
An electric auxiliary single-wheeled carrier, which is located behind and above the shaft .