JP3506623B2 - Electric auxiliary carrier - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric auxiliary vehicle.

[0002]

2. Description of the Related Art Examples of electric auxiliary vehicles equipped with a motor for assisting human power include, for example, Japanese Utility Model Publication No. 52-6097 entitled "Electric Carrier" (hereinafter referred to as "Prior Art") and JP-A-3. -265403 gazette "electric cart" (hereinafter,
This is called "conventional technology". ). According to FIG. 1, FIG. 2 and FIG. 5 of the publication, the above-mentioned conventional technique is such that the grip 4 is operated in accordance with the difference between the speed at which the worker walks while holding the grip and the traveling speed of the carrier. The auxiliary power generated in the DC motor M is changed by sliding and sequentially moving the mover 15 of the switch 14 according to the amount of movement. That is, the mover 15 is in contact with the stator S ₀ in a neutral state in which the grip 4 does not move, and the stator S ₀ → S ₁ depends on the amount of movement of the grip 4.
The contact is switched in the order of → S ₂ → S ₃ .

The above-mentioned conventional technique is shown in FIG.
According to FIG. 8, when the operator pushes and pulls the handle 14, the handle 14 moves according to the force, and the auxiliary power generated by the motor 8 with a reducer changes according to the amount of movement of the handle 14. That is.

[0004]

By the way, there are cases where the electric carrier travels on a flat road surface and cases where a lightweight object is carried by the electric carrier. In such a case, the force of pushing the grip 4 is small in such a case. As a result, since the amount of movement of the grip 4 is small, the moving element 15 moves to the stator S.
It is possible that the switch from ₀ to the stator S ₁ does not occur. The DC motor M does not generate auxiliary power until switching to the stator S ₁ . Since the electric carrier is operated without receiving auxiliary power, the burden on the operator is large. It is conceivable that the force for pushing the grip 4 is intermittently increased or decreased for operation, but this does not allow the electric transport vehicle to travel smoothly. In addition, even with a very small pushing force,
It is conceivable to lower the so-called auxiliary starting point so that the auxiliary power is generated from the DC motor M. However, setting the auxiliary starting point is not easy. On the other hand, depending on the transportation situation, the physical strength of the operator, and the like, there is a case where it is desired to operate the electric transport vehicle by freely receiving auxiliary power without depending on the force pushing the grip 4. The above-mentioned conventional technique is also the same.

Therefore, an object of the present invention is to make it possible to generate auxiliary power from the motor with a simple structure even when the force for pushing the grip is extremely small, and to obtain the auxiliary power without depending on the pushing force of the grip. It is an object of the present invention to provide a power assisted vehicle that can optionally generate auxiliary power from a motor.

[0006]

In order to achieve the above object, the first aspect of the present invention is to provide a slide type grip at the end of an operation handle extending rearward and upward from a vehicle body frame having a motor, and a grip facing the vehicle body frame. An electric power assisted vehicle that includes a movement amount detection unit that detects the movement amount of the vehicle, generates auxiliary power with a motor according to the movement amount detected by the movement amount detection unit, and assists human power with this auxiliary power. In addition, the auxiliary operation mechanism that forcibly pushes the grip toward the body frame by performing auxiliary operations such as gripping operation, twisting operation, finger movement operation, etc. with the hand on the grip It is characterized by having.

The grip slides in accordance with the force of gripping and pushing the grip, and the motor generates auxiliary power in accordance with the amount of movement to assist human power. Further, the auxiliary operation mechanism forcibly pushes the grip toward the vehicle body frame by arbitrarily performing an auxiliary operation on the auxiliary operation mechanism with the hand on the grip. The motor generates auxiliary power in accordance with the amount of movement of the push, and assists human power. In this way, the electric auxiliary vehicle can be driven by receiving the auxiliary power according to the force pushing the grip or the auxiliary power by any auxiliary operation. An auxiliary operation mechanism forced the slide grip toward the body frame. As a result, the basic configuration of the grip and the movement amount detection unit can be shared for performing two different operations, the pushing operation of the grip and the auxiliary operation by the auxiliary operation mechanism.

According to a second aspect of the present invention, a slide type grip is attached to an end portion of an operation handle extending rearward and upward from a vehicle body frame equipped with a motor in a state of being elastically ejected toward a worker, and the grip is orthogonal to the center of the handle. The arm that extends in the same direction, attach a bracket that extends in the same direction as this arm to the end of the operation handle, attach a movement amount detection unit that detects the movement amount of the arm to the bracket, and adjust the movement amount detected by this movement amount detection unit. In response to the electric assist vehicle, the motor generates auxiliary power in response to this, and the auxiliary power is used to assist human power. It swings so that it can be swung, and it extends along the grip to extend over the arm toward the operator, and at the other end of the extension, the longitudinal middle part of the auxiliary lever is swung in the same direction as the hanging member. The auxiliary lever is provided with a finger hook at one end on the operator side, and the push-out portion at the other end of the auxiliary lever is tilted from the hanging member toward the operation handle at a predetermined angle and is applied to the arm so that the push-out portion of the auxiliary lever It is characterized in that the space between the intermediate part and the intermediate part is applied to a projecting support part projecting from the grip, and this projecting support part is used as a fulcrum when the auxiliary lever is swung.

The grip slides in accordance with the force of gripping and pushing the grip, and the motor generates auxiliary power in accordance with the amount of movement to assist human power. Further, when the finger-holding portion is gripped and operated by the hand hung on the grip, the auxiliary lever swings around the projecting support portion as a fulcrum, and the pushing portion at that end pushes the arm toward the vehicle body frame forcibly. The amount of movement of the arm is detected by the amount of movement detection unit, and the motor generates auxiliary power according to the detected amount of movement to assist human power. In this way, the electric assist vehicle can be driven by receiving the auxiliary power according to the force pushing the grip or the auxiliary power by the auxiliary operation of gripping the finger rest. Since the auxiliary lever is hooked by the hanging member on the bracket for mounting the movement amount detecting portion, the structure for mounting the auxiliary lever on the operation handle is simple.

A third aspect of the present invention is characterized in that the hanging member or the bracket is provided with a stopper for limiting a separation swing angle at which the hanging member swings away from the operation handle. Since the separating swing angle of the hanging member is limited, the push-out portion of the auxiliary lever comes into contact with a predetermined position of the arm.
As a result, the contact position of the pushing portion with respect to the arm is substantially the same. Therefore, the position of the finger rest of the auxiliary lever with respect to the grip does not change. Moreover, there is no concern that the push-out part will come off from the arm.

According to a fourth aspect of the present invention, the auxiliary lever or the grip is provided with a stopper for restricting the push-out portion of the auxiliary lever from being reversed in the direction away from the arm. Since the inversion of the auxiliary lever is limited, the direction of the auxiliary lever is fixed. Therefore, the position of the finger rest of the auxiliary lever with respect to the grip does not change.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. In addition, "before", "after",
“Left”, “right”, “upper”, and “lower” follow the direction viewed from the operator, Fr indicates the front side, Rr indicates the rear side, L indicates the left side, and R indicates the right side. Further, the drawings are to be viewed in the direction of reference numerals. FIG. 1 is a perspective view of an electric assist vehicle according to the present invention. The electric auxiliary transport vehicle 1 has a single wheel 3 attached to the vehicle body frame 2 substantially in the center in the vehicle width direction, and the left and right batteries 4L, 4R, the motor 5, and the power for transmitting the output of the motor 5 to the vehicle wheel 3 on the vehicle body frame 2. The transmission mechanism 6 is attached, the left and right operation handles 7L and 7R are extended rearward from the vehicle body frame 2, the luggage carrier 8 is attached to the upper portion of the vehicle body frame 2, and auxiliary power is generated by the motor 5 in accordance with the manual operation force. It is an electric assisted single-wheel carrier that assists human power with this auxiliary power. More specifically, the left and right operation handles 7L, 7R are bar handles extending rearward and upward from the vehicle body frame 2, and grips 11L, 11R are attached to their ends.
Further, the left operation handle 7L includes the brake lever 12, and the right operation handle 7R includes the auxiliary power system operation mechanism 40.
And an auxiliary operation mechanism 70.

FIG. 2 is an electric circuit diagram of the electric auxiliary carrier according to the present invention, showing a circuit for controlling the motor 5 by the auxiliary power system operation mechanism 40. The electric circuit of the electric auxiliary vehicle detects the batteries 4L and 4R, the key switch 22 as a main switch, the movement amount detection unit 62 of the auxiliary power system operation mechanism 40, the motor 5, and the rotation speed of the motor 5 in the control unit 21. A vehicle speed detector 23 and a battery level indicator 24 for displaying the levels of the batteries 4L and 4R are connected. Control unit 21
Has a function of controlling the motor 5 according to the output of the movement amount detection unit 62 when the output of the movement amount detection unit 62 is equal to or more than a predetermined value set in advance.

FIG. 3 is a side view of the electric auxiliary carrier according to the present invention. The body frame 2 has a control unit 21 attached to the longitudinal center thereof and below the loading platform 8, and a key switch 22 and a battery level indicator 24 attached to a mounting plate 2a at the rear. The power transmission mechanism 6 transfers the power of the motor 5 to the first
The reduction mechanism 31, the transmission shaft 32, and the second reduction mechanism 33 are mechanisms that transmit to the wheels 3 via the axle 3a. The first reduction mechanism 31 has a built-in one-way clutch (not shown) capable of transmitting power only from the motor 5 to the axle 3a.
In the figure, 8a is a cargo fence.

FIG. 4 is a side sectional view of the operating handle, auxiliary power system operating mechanism and auxiliary operating mechanism according to the present invention. The right operation handle 7R is made of a pipe material, and a round bar 41 is attached to the tip thereof. The grip 11R is a slide type grip, and a pipe slider portion 44 slidably inserted into the bar 41 of the right operation handle 7R.
And a rubber grip portion 45 covering the slider portion 44. The auxiliary power system operation mechanism 40 has two
A slider mechanism 44 is fitted through the two bushes 42, 43, and a stopper mechanism 46 is provided between the slider portion 44 and the operation handle 7R to regulate the movement amount S of the grip 11R.
An elastic member 47 for pushing the grip 11R to the operator side (the right side in this figure) and an adjusting mechanism 51 for initially adjusting the action neutral point of the elastic member 47 are attached, and a bracket 61 is attached to the pipe tip portion of the operation handle 7R. The movement amount detection unit 62 is attached.

The stopper mechanism 46 is composed of a pin 48 fixed to the bar 41 in the direction perpendicular to the axis, and an elongated hole 44a formed in the slider portion 44 to fit the pin 48 in the axial direction. The length of the long hole 44a is such that the slider portion 44 can be moved by a predetermined movement amount S. Stopper mechanism 46
Since the long hole 44a and the pin 48 are combined together, the movement amount of the grip 11R is restricted and the grip 11R has a simple structure.
R rotation can be stopped. The pin 48 is the long hole 4
If necessary, a rubber cushioning material 48
a. The elastic member 47 is a compression spring inserted in a hole 41a that opens at the rear end surface (right end surface in the drawing) of the bar 41.
The adjusting mechanism 51 includes a bolt attachment plate 52 attached to the rear end portion (right end in the figure) of the slider portion 44 and concentrically with the elastic member 47.
And an adjusting bolt 54 for pushing the elastic member 47 into the bolt mounting plate 52 via a flat washer 53, and an adjusting bolt lock nut 55.

The slider portion 44 has a plate-like arm 63 fixed to the base end portion and extending in the direction perpendicular to the axis. In this way, the arm 63 extending from the grip 11R orthogonally to its center is screwed with the push bolt 64 directed toward the vehicle body frame 2 (toward the left in this figure) along the slider portion 44 and locked by the lock nut 65. It is a thing. The movement amount detection unit 62 moves the push rod 62b forward and backward,
The amount of movement of the grip 11R toward the vehicle body frame 2 is detected and converted into an electric signal, and is composed of, for example, a variable resistor 62a shown in FIG. The push rod 62b of the movement amount detection unit 62 is in a position to be pushed by the push bolt 64.

The auxiliary operating mechanism 70 is operated by an auxiliary operation with the hand hung on the grip 11R, and thus the grip 11R is operated.
Is a mechanism for forcibly pushing out toward the body frame 2 (to the left in this figure). Specifically, the auxiliary operation mechanism 70
Is mounted on the bracket 61 so that one end 71A of the hanging member 71 can swing toward and away from the grip 11R, and the hanging member 71 is substantially aligned with the grip 11R.
And extends to the operator side, and the longitudinal intermediate portion 72a of the auxiliary lever 72 is swingably hung on the extending other end 71B in the same direction as the hanging member 71, and a finger hook portion is provided on one end of the auxiliary lever 72 on the operator side. 72b, the push-out portion 72c at the other end of the auxiliary lever 72 is brought into contact with the arm 63 in a state in which the push-out portion 72c is inclined from the hanging member 71 toward the operation handle 7R by a predetermined angle θ, and the intermediate portion 72a of the auxiliary lever 72 and the push-out portion 72c are provided. Is applied to the protruding support portion 45a protruding from the grip 11R,
The protrusion support portion 45a serves as a fulcrum when the auxiliary lever 72 is swing-operated. Projection support part 45a
Consists of the outer peripheral end surface of the collar portion 45b formed at the tip of the grip portion 45 on the arm 63 side. In the figure, 66 is a cover for the movement amount detection unit, and 67 and 67 are cover mounting screws.

FIG. 5 is a sectional view taken along the line 5-5 of FIG. 4, showing the configuration with the grip portion 45 and the cover 66 removed. The bracket 61 is a laterally symmetrical tapered plate member having a narrow base end and a wide width in the extending direction in the rear view shown in this figure. As a result, the bracket 61 has slanted hanging portions 61a, 61a on the left and right shoulder portions.

The hanging member 71 is formed by bending a wire material having elasticity such as a piano wire, and overlapping the bent tips 71a, 71a with each other to make the operation handle 7R (see FIG. 4) elongated and substantially rectangular. It is a loop member formed in the loop (ring). This loop member includes a wide front line portion 71A, a narrow rear line portion 71B, a left line portion 71C, and a right line portion 71D in a substantially rectangular loop.
It consists of four line parts, and these four line parts form four sides of a quadrangle. The front line portion 71A, that is, the hanging member 7
One end 71A of the bracket 1 has hook portions 61a, 61 of the bracket 61.
The portion to be hung on a, and the rear line portion 71B, that is, the other end 71B of the hanging member 71 is the intermediate portion 72 of the auxiliary lever 72.
The parts to which a is applied, and the left and right line parts 71C and 71D are parts that are elastically bulged inward of the loop. The portion where the bent tips 71a of the wire rods 71a overlap each other is referred to as the rear wire portion 7
1B.

The supported structure of the intermediate portion 72a of the auxiliary lever 72 includes a lateral hole 72d penetrating the auxiliary lever 72,
The supported pipe 73 fitted into the lateral hole 72d and the supported pipe 7 by press fitting into the outer peripheral surfaces of both ends of the supported pipe 73.
3 is composed of push nuts 74, 74 for preventing the coming off. By inserting the bent tips 71a, 71a of the hanging member 71 from both sides of the supported pipe 73, the intermediate portion 72a can be swingably supported.

FIG. 6 is a perspective view of the auxiliary power system operating mechanism and the auxiliary operating mechanism according to the present invention. The bracket 61 has a base end fixed to the end of the operation handle 7R.
It is a plate-shaped member that extends in a direction orthogonal to the center of R and in the same direction as the arm 63. As a result, the plate surface of the bracket 61 faces the plate surface of the arm 63.

One end 71A of the loop of the hanging member 71 is fitted into the bracket 61, and the left and right slanted hanging portions 61a,
By hanging a loop on 61a, the hanging member 71 can be swingably supported on the bracket 61.
Moreover, since the bracket 61 is a plate material having a predetermined plate thickness, and the hanging portions 61a, 61a are inclined surfaces that spread toward the tip end side of the bracket 61, the hanging portions 61a, 61a are the hanging members 7a.
1 swings away from the operation handle 7R,
It plays the role of a stopper for limiting the so-called separation swing angle α (see FIG. 4). When describing this stopper, the following description will be made with reference to "first stoppers 61a, 61a".
a ". Since the separation swing angle α of the hanging member 71 is limited, the push-out portion 72c of the auxiliary lever 72 has the arm 63
Hit a predetermined position. As a result, the push-out portion 72c contacts the arm 63 at substantially the same position. Therefore, the finger hook portion 72b of the auxiliary lever 72 with respect to the grip 11R
The position of does not change.

The hanging member 71 has a stopper 75 (hereinafter referred to as a "second stopper 75") detachably hung on the left line portion 71C and the right line portion 71D. The second stopper 75 also includes the first stoppers 61a, 61a.
Like a, it is a member for limiting the separation swing angle α of the hanging member 71. Specifically, the second stopper 75
Is passed through a position closer to the operation handle 7R than the push rod 62b, so that when the hanging member 71 swings at a predetermined angle in a direction away from the operation handle 7R,
By hitting the push rod 62b, the separation swing angle α
To limit. First and second stoppers 61a, 61a, 7
Since there is 5, there is no concern that the push-out portion 72c of the auxiliary lever 72 will come off the arm 63. The second stopper 7
The mounting direction of 5 is not limited, and may be mounted upside down, for example.

Further, the pushing portion 72c of the auxiliary lever 72
Stopper 45c (hereinafter, referred to as "third stopper 45") for restricting reversal in a direction away from the arm 63.
Say "c". ) Was prepared for the grip 11R. Specifically, the grip portion 45 has a collar portion 45b at the tip on the arm 63 side.
The end face of the collar portion 45b facing the arm 63 is used as a third stopper 45c, and the protrusion 72e is integrally formed on the auxiliary lever 72. The protrusion 72e is moved from the arm 63 by the third stopper 45c. Restrict flipping away.

FIG. 7 is a perspective view of the auxiliary lever according to the present invention, showing the auxiliary lever 72 seen from the opposite side to FIG. The auxiliary lever 72 is a resin product and has an intermediate portion 72a.
By forming a downward-open long groove 72g on the lower surface 72f around the periphery of the groove and forming a slit 72i penetrating between the long groove 72g and the lateral hole 72d on the right side surface 72h, a part of the right side surface 72h is formed as an elastic piece 72j. It was done. Since the elastic piece 72j is provided, the push nut 74 can be further prevented from being loosened.

FIG. 8 is an exploded perspective view of the auxiliary power system operating mechanism according to the present invention and an explanatory view of the assembling procedure. The relationship between the respective constituent members of the auxiliary power system operating mechanism 40 and the auxiliary operating mechanism 70 is shown. Indicates. The procedure for assembling the auxiliary power system operation mechanism 40 is as follows: (1) Insert the slider portion 44 into which the bushes 42, 43 and the seal member 49 are fitted into the bar 41,
(2) Align the positions of the round hole 41b and the long hole 44a, and attach the pin 4
8 is attached, and (3) the elastic member 47 and the flat washer 5 are provided in the hole 41a.
After inserting 3, the bolt mounting plate 52 is pressed into the square hole 44b. Next, (4) the operating neutral point of the elastic member 47 is initially adjusted with the adjusting bolt 54 screwed into the bolt mounting plate 52, the lock nut 55 is tightened, and (5) the grip portion 45 is covered and fixed to the slider portion 44. To do. After that, (6) the push bolt 64 is screwed into the arm 63, (7) the movement amount detecting portion 62 is attached to the bracket 61 with the bolts 68, 68,
(8) After setting the detection reference point of the movement amount detection unit 62, tighten the lock nut 65.

Next, the procedure for assembling the auxiliary operating mechanism 70 will be described with reference to FIGS. 9 and 10. 9A to 9C are explanatory views (No. 1) showing the assembling procedure of the auxiliary operation mechanism according to the present invention. First, in FIG. 9A, the supported pipe 73 is inserted into the lateral hole 72d of the auxiliary lever 72, and the push nuts 7 are attached to the outer peripheral surfaces of both ends of the supported pipe 73.
Press in 4,74. Next, in FIG. 9B, after the auxiliary power system operation mechanism 40 is assembled to the right operation handle 7R, the bending tips 71a and 71a of the hanging member 71 are opened, and the bracket 61 is inserted in the plate thickness direction. Put in. FIG. 9 (c)
9 is a view of the above FIG. 9 (b) as seen from below.
Insert 1 into the bracket 61 from the direction indicated by the imaginary line,
Further, the one end 7 while changing the direction toward the grip 11R side
After 1A is hung on the bracket 61 and the auxiliary lever 72 is aligned, the bending tips 71a, 71a are closed and the auxiliary lever 72 is set.

10 (a) to 10 (c) are explanatory views (No. 2) showing the assembling procedure of the auxiliary operating mechanism according to the present invention.
After setting the auxiliary lever 72, the second stopper 75 is attached to the hanging member 71 in FIG. Next, in FIG. 10B, by attaching the cover 66 to the right operation handle 7R with screws 67, 67,
As shown in FIG. 10C, the cover 66 covers the movement amount detection unit 62, and the work is completed.

FIGS. 11A to 11D are explanatory views of the operating principle of the auxiliary operation mechanism according to the present invention. (A) shows a schematic side structure in a state where the auxiliary operation mechanism 70 is attached, and (b) shows a state in which the bracket 61 is hung by the hanging member 71 in that state. Since the one end 71A of the loop is hooked on the first hooking portions (first stoppers) 61a, 61a formed of inclined surfaces, the swing range of the hooking member 71 is limited to the predetermined separation swing angle α.

(C) is a diagram schematically showing (a) above, in which the pushing-out portion 72c of the auxiliary lever 72 contacts the back surface of the arm 63 in a state where the separating swing angle α of the hanging member 71 is limited. Indicates that In this state, the hanging member 71 does not swing clockwise in the figure. Further, the push-out portion 72c tilted from the hanging member 71 toward the operation handle 7R by a predetermined angle θ is applied to the arm 63. For this reason,
Extruding portion 72 centered on the other end 71B of the hanging member 71
The arc-shaped swing locus of c has a linearly extending arm 6
It will intersect with 3. As a result, the player cannot swing counterclockwise in the figure. Furthermore, the third stopper 45c
Since the protrusion 72e hits against, the auxiliary lever 72 cannot swing in the clockwise direction in the drawing. Therefore, even if the self-weight W of the auxiliary lever 72 acts on the other end 71B of the hanging member 71, the pushing portion 72c does not come off from the arm 63.

In the state of (c), (d) shows the finger hook portion 72b of the auxiliary lever 72 on the grip 11R side (arrow U).
Direction) indicates that the swing operation has been performed. Auxiliary lever 72
At the point P between the extruded portion 72c and the intermediate portion 72a.
However, since it hits the protruding support portion 45a protruding from the grip 11R, the protruding support portion 45a serves as a fulcrum when the auxiliary lever 72 swings. The arc-shaped swing locus of the pushing portion 72c centering on this fulcrum intersects the linearly extending arm 63. As a result, the pushing portion 72c swings in the direction of the arrow D, forcibly pushing the rear surface of the arm 63 toward the vehicle body frame (left side in this figure). Therefore, the grip 11R is also forcedly pushed toward the vehicle body frame.

Next, the auxiliary power system operating mechanism 40 having the above structure
The operation of the auxiliary operation mechanism 70 will be described with reference to FIGS. 4 and 12. In FIG. 4, when the grip 11R is grasped and pushed in the direction toward the body frame 2 (leftward in this figure),
The pushing force acts on the elastic member 47 in the route of the slider portion 44 → the bolt mounting plate 52 → the adjusting bolt 54 → the plain washer 53.
Therefore, the grip 11R slides by the movement amount according to the pushing force. The push bolt 64 is attached to the grip 11
It slides by the same movement amount as R and pushes the push rod 62b of the movement amount detection unit 62. The movement amount detection unit 62 emits an output according to the movement amount of the push rod 62b.

When the pushing force of the grip 11R is released, the elastic force of the elastic member 47 causes the grip 11R to automatically return to the original position shown in the figure, so that the output of the movement amount detecting section 62 becomes zero. After that, the finger rest 72 of the auxiliary lever 72
When b is swing-operated to the grip 11R side (arrow U direction), the auxiliary lever 72 is displaced to the position shown in FIG.

FIG. 12 is an operation explanatory view of the auxiliary power system operating mechanism and the auxiliary operating mechanism according to the present invention. Auxiliary lever 72
When is swung and displaced from the position indicated by the imaginary line to the position indicated by the solid line, the pushing portion 72c forcibly pushes the rear surface of the arm 63 toward the vehicle body frame (left side in this figure). The pushing force acts on the elastic member 47 in the same path as when the grip 11R is gripped and pushed. Therefore, the grip 11R slides by the amount of movement according to the force for operating the finger rest 72b. As a result, the movement amount detection unit 62
Since the push rod 62b slides by the same movement amount as the grip 11R, an output corresponding to the movement amount is emitted. When the operating force of the finger rest 72b is released, the elastic member 4
By the elastic force of 7, the grip 11R and the auxiliary lever 7
2 automatically returns to the original position shown in FIG. 4, the output of the movement amount detection unit 62 becomes zero.

Next, the operation of the electric auxiliary carrier 1 will be described with reference to FIGS. 13 and 14. FIGS. 13 (a) and 13 (b) are action diagrams (1) of the electric assist vehicle according to the present invention.
As shown in (a), when the electric auxiliary transport vehicle 1 loaded with lightweight objects is run on a level ground, the force F1 of grasping and pushing the grip 11R is small. Therefore, the amount of movement of the grip 11R is small, and the output of the movement amount detection unit 62 is also small. Since the output of the movement amount detection unit 62 does not reach the preset predetermined value, the control unit 21 does not issue the control signal to the motor 5. That is, since the pushing force F1 is smaller than the predetermined reference pushing force F0 for the motor 5 to generate the auxiliary power, the control unit 21 does not issue the control signal, and as a result, the motor 5 does not generate the auxiliary power. At this time, the electric assisted vehicle 1 can be driven by human power alone. Since the one-way clutch (not shown) is built in the first reduction mechanism 31 shown in FIG. 3, the rotational force of the wheel 3 is not transmitted to the motor 5.

As shown in (b), when the finger hook portion 72b of the auxiliary lever 72 is arbitrarily grasped by a finger of the hand hung on the grip 11R to perform a swing operation (auxiliary operation), the push-out portion 72c of the auxiliary lever 72 is removed. Arm 63 and grip 11
Forcibly push R toward the body frame 2. That is, by operating the auxiliary lever 72 with the hand hung on the grip 11R, the operation force of the auxiliary lever 72 can be converted into the force with which the grip 11R slides toward the vehicle body frame 2. As a result, since the grip 11R slides by the amount of movement corresponding to the force for operating the finger rest 72b, based on the output of the movement amount detector 62 at this time,
The control unit 21 in (a) issues a control signal to the motor 5.
The output of the movement amount detection unit 62 changes according to the force with which the finger hook 72b is gripped, and the control unit 21 controls the motor 5 to output the corresponding auxiliary power. Therefore, the human power is assisted by the auxiliary power, and the labor is reduced.

FIGS. 14 (a) and 14 (b) are action diagrams (part 2) of the electric auxiliary carrier according to the present invention. As in (a), the electric auxiliary transport vehicle 1 loaded with heavy objects is run,
When the electric assisted transport vehicle 1 travels uphill, the force F2 of gripping and pushing the grip 11R is large. When the pushing force F2 of the operating operator (operator) M becomes larger than the reference pushing force F0, the grip 11R in (b) has a corresponding movement amount. Therefore, based on the output of the movement amount detecting unit 62 at this time. Then, the control unit 21 issues a control signal to the motor 5. The output of the movement amount detection unit 62 changes according to the pushing force F2, and the control unit 21 outputs the corresponding auxiliary power.
To control. Human power can be assisted with auxiliary power.

In this way, the operator M grips the electric assist vehicle 1 in either case of (1) traveling only by human power or (2) traveling by receiving auxiliary power. All that is required is to continue the single operation of gripping and pushing 11L and 11R. Further, the auxiliary power can be automatically adjusted by operating the grip 11R with a pressing force F2 of a predetermined value or more, and the auxiliary lever 72 of the auxiliary operation mechanism 70 can be arbitrarily operated to operate the grip 1R.
The auxiliary power can be freely generated without depending on the pushing force of 1R. Therefore, it is possible to travel even with a light pushing operation force that is less than the predetermined reference pushing force F0 of the grip 11R. Therefore, no matter what the road surface condition,
Since the electric auxiliary carrier 1 can be operated easily and easily, the operability is high.

In the above embodiment of the present invention,
(1) The electric auxiliary transport vehicle 1 is not limited to a one-wheel transport vehicle, and includes, for example, left and right two-wheel transport vehicles, front and rear two-wheel transport vehicles,
It may be a four-wheel carrier. (2) Auxiliary power system operation mechanism 40 and auxiliary operation mechanism 70
May be attached to the left operation handle 7L. (3) The auxiliary operation mechanism 70 is a slide type grip 11R.
It suffices that the grip 11R is forcibly pushed toward the vehicle body frame 2 by performing an auxiliary operation such as a grip operation, a twist operation, or a finger movement operation with the hand hung on the. (4) The hanging member 71 may have one end swingably hung on the bracket and the other end of the auxiliary lever swingably hung on the other end. The hanging member 71 may have a shape, size, material and both ends. It doesn't matter.

(5) The projecting support portion 45a projecting from the grip 11R may be one that serves as a fulcrum when the auxiliary lever 72 is swung. (6) The stopper for limiting the separation swing angle α at which the hanging member 71 swings away from the operation handle 7R may be provided on at least the bracket 61 or the hanging member 71. For example, one or both of the first stoppers 61 a and 61 a provided on the bracket 61 and the second stopper 75 provided on the hanging member 71 may be provided. (7) The third stopper 45c may be provided on the auxiliary lever 72 or the grip 11R.

[0042]

The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, an auxiliary operation mechanism for forcibly pushing the grip toward the vehicle body frame is operated by performing an auxiliary operation such as a gripping operation, a twisting operation, a finger moving operation, etc. with a hand hung on the slide type grip. Since the steering wheel is provided, the auxiliary operation mechanism can be arbitrarily operated to forcibly push the grip toward the vehicle body frame to generate auxiliary power by the motor and assist the human power with this auxiliary power. As a result, the auxiliary power can be automatically adjusted by operating the grip with a pushing force of a predetermined value or more, and the auxiliary power can be adjusted by arbitrarily operating the auxiliary operating mechanism without depending on the pushing force of the grip. It can be generated freely. Therefore, the electric assisted vehicle can be operated easily and easily regardless of the road surface condition, resulting in high operability.

Further, since the slide type grip is forcibly pushed out toward the vehicle body frame by the auxiliary operation mechanism, two different operations, that is, the pushing operation of the grip and the auxiliary operation by the auxiliary operation mechanism are performed. However,
The basic configuration of the grip and the movement amount detection unit can be shared. Therefore, the configuration for performing two different operations can be a simple configuration with a small number of parts.

According to a second aspect of the present invention, the bracket for mounting the movement amount detecting portion is swingably hung on the bracket in such a direction that one end of the hanging member is brought into contact with and separated from the grip. The auxiliary lever is hung on the other end so that the longitudinal middle part of the auxiliary lever can swing in the same direction as the hanging member, so the grip is forced toward the vehicle body frame with a simple structure with a small number of parts. The auxiliary lever that pushes out can be easily attached to the operation handle. Moreover, it is not necessary to adjust the attachment position of the auxiliary lever with respect to the operation handle or the grip.

Furthermore, the push-out portion of the auxiliary lever is tilted from the hanging member toward the operation handle by a predetermined angle and then is brought into contact with the arm, and the space between the push-out portion and the intermediate portion of the auxiliary lever is brought into contact with the projecting support portion projecting from the grip. Since this projection support part was used as a fulcrum when swinging the auxiliary lever, swinging the finger hook with the projection support part as a fulcrum allows the push-out part of the auxiliary lever to move the arm to the movement amount detection part side. It can be easily extruded. As a result, the amount of movement of the arm is detected by the movement amount detection unit, the motor generates auxiliary power according to the detected amount of movement, and this auxiliary power can assist human power. Therefore, in addition to automatically adjusting the auxiliary power by operating the grip with a predetermined pressing force, by freely operating the auxiliary operating mechanism, the auxiliary power can be freely adjusted without depending on the pressing force of the grip. Can be generated. Therefore, the electric assisted vehicle can be operated easily and easily regardless of the road surface condition, resulting in high operability.

According to the third aspect of the invention, since the hanging member or the bracket is provided with a stopper for limiting the separation swing angle at which the hanging member swings away from the operation handle, the pushing portion of the auxiliary lever is located at a predetermined position of the arm. Hit
As a result, the contact position of the pushing portion with respect to the arm is substantially the same. Therefore, the position of the finger rest of the auxiliary lever with respect to the grip does not change. Moreover, there is no concern that the push-out part will come off from the arm.

According to the fourth aspect of the invention, since the auxiliary lever or the grip is provided with a stopper for restricting the push-out portion of the auxiliary lever from being reversed in the direction away from the arm, the direction of the auxiliary lever can be easily determined. Therefore, the position of the finger rest of the auxiliary lever with respect to the grip does not change.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric auxiliary carrier according to the present invention.

FIG. 2 is an electric circuit diagram of an electric auxiliary carrier according to the present invention.

FIG. 3 is a side view of the electric auxiliary carrier according to the present invention.

FIG. 4 is a side sectional view of an operating handle, an auxiliary power system operating mechanism, and an auxiliary operating mechanism according to the present invention.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is a perspective view of an auxiliary power system operation mechanism and an auxiliary operation mechanism according to the present invention.

FIG. 7 is a perspective view of an auxiliary lever according to the present invention.

FIG. 8 is an exploded perspective view of the auxiliary power system operating mechanism and the auxiliary operating mechanism according to the present invention, and an explanatory view of the assembling procedure.

FIG. 9 is an explanatory view (No. 1) showing an assembling procedure of the auxiliary operation mechanism according to the present invention.

FIG. 10 is an explanatory view showing an assembling procedure of the auxiliary operation mechanism according to the present invention (No. 2).

FIG. 11 is an explanatory diagram of the operating principle of the auxiliary operation mechanism according to the present invention.

FIG. 12 is an operation explanatory view of the auxiliary power system operation mechanism and the auxiliary operation mechanism according to the present invention.

FIG. 13 is a functional diagram of the electric auxiliary carrier according to the present invention (No. 1)

FIG. 14 is an operation diagram of the electric auxiliary carrier according to the present invention (part 2)

[Explanation of symbols]

1 ... Electric auxiliary carrier, 2 ... Body frame, 3 ... Wheels, 5
... Motor, 7R ... Right operation handle, 11R ... Sliding grip, 45a ... Projection support part, 45c ... Stopper (third stopper) which limits reversal of extrusion part, 47 ... Elastic member, 61 ... Bracket, 61a ... Hooking portion (first stopper), 62 ... Movement amount detecting portion, 63 ... Arm, 70 ...
Auxiliary operation mechanism, 71 ... Hanging member, 71A ... One end of hanging member, 71B ... Other end of hanging member, 72 ... Auxiliary lever, 72
a ... Longitudinal middle part, 72b ... Finger hanging part, 72c ... Pushing part, 75 ... Stopper (second stopper) for limiting the separating swing angle of the hanging member, M ... Worker, .alpha.

Continuation of the front page (56) Reference JP-A-8-47114 (JP, A) JP-A-9-122183 (JP, A) JP-A-10-273051 (JP, A) JP-A-10-211240 (JP , A) JP-A-10-157624 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60L 15/00 B62B 1/18 B62B 5/06

Claims (4)

(57) [Claims] 1. A slide type grip and a movement amount detecting section for detecting a movement amount of the grip toward the vehicle body frame are provided at an end portion of an operation handle extending rearward and upward from a vehicle body frame equipped with a motor. An electric power assisted carrier that generates auxiliary power from the motor according to the amount of movement detected by the amount detection unit and assists human power with this auxiliary power. The operation handle is also provided with an auxiliary operation mechanism for forcibly pushing the grip toward the body frame by performing an auxiliary operation such as a grip operation, a twist operation, a finger movement operation, etc. An electric auxiliary carrier. 2. A slide-type grip is attached to the end of an operation handle extending rearward and upward from a body frame equipped with a motor in a state of being elastically ejected to the operator side, and an arm orthogonal to the center of the grip is provided. And a bracket extending in the same direction as this arm is attached to the end of the operation handle, a movement amount detection unit for detecting the movement amount of the arm is attached to the bracket, and the movement amount detection unit detects the movement amount according to the movement amount detected by the movement amount detection unit. A motor-assisted vehicle that generates auxiliary power by a motor and assists human power with this auxiliary power. The electric auxiliary vehicle swings in a direction in which one end of a hanging member is attached to and detached from the bracket. Hang as much as possible, extend this hanging member almost along the grip, extend over the arm and extend to the operator side,
On the other end of the extension, the longitudinal middle part of the auxiliary lever is swingably hung in the same direction as the hanging member, a finger hook is provided at one end on the operator side of the auxiliary lever, and the push-out part at the other end of the auxiliary lever is attached to the hanging member. The auxiliary lever is swung by operating the auxiliary lever while tilting it toward the operating handle by abutting it on the arm, and by hitting the protruding support part protruding from the grip between the push-out part and the intermediate part of the auxiliary lever. An electric auxiliary carrier that is used as a fulcrum of time. 3. The electric assisted transport according to claim 2, wherein the hanging member or the bracket is provided with a stopper for limiting a separation swing angle at which the hanging member swings away from the operation handle. car. 4. The electric auxiliary transport according to claim 2, wherein the auxiliary lever or the grip is provided with a stopper for restricting the push-out portion of the auxiliary lever from being reversed in the direction away from the arm. car.