JP2004001662A - Traveling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling vehicle of portable size and weight. <P>SOLUTION: A frame for rotatably supporting a front wheel 5 and a rear wheel 9 and supporting a steering mechanism 7 for changing the direction of the front wheel 5 or rear wheel 9 and further supporting a saddle 19 for supporting a rider, is formed in nearly I-shape. Since the front wheel 5 and rear wheel 9 are small in diameter, a bicycle 1 can be miniaturized and reduced in weight. Since vibration generated in travel is absorbed by vibration absorbing materials 37, 65 fixing support shafts for supporting the wheels 5, 9 to a body frame 3, smooth and stable travel can be performed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a traveling vehicle such as a bicycle.
[0002]
[Prior art]
DESCRIPTION OF RELATED ART Conventionally, as a self-propelled traveling vehicle, there is a bicycle, for example. In a normal bicycle, a front wheel that can change direction, a rear wheel that is a drive wheel, a frame that rotatably supports the front and rear wheels, a saddle on which a driver sits, and a handle for changing the direction of the front wheel are provided. In general, the driver has a drive mechanism for driving the rear wheels by a pedal.
[0003]
That is, the driver sits on the saddle, depresses the pedal with both left and right legs, rotates the rear wheel by the drive mechanism to obtain thrust, and changes the direction of the front wheel with the handle held by both hands, and proceeds in the desired direction. .
[0004]
[Problems to be solved by the invention]
However, since the bicycle as described above is used for the movement of a human driver, it is required to have strength and size to support a human, and because of its heavy weight, it is difficult to carry it to a desired place without traveling. Is inconvenient. In other words, in terms of size, the size of the bicycle frame can be reduced to about half by making it foldable in two, but it is difficult to further reduce the size. Therefore, a further reduction in size and weight of a portable traveling vehicle is desired.
[0005]
By the way, when the diameter of the wheel is reduced by downsizing, it is difficult to ride even a small step. Such a problem also applies to a tricycle or a wheelchair as a traveling vehicle.
[0006]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems. The traveling vehicle according to the first aspect of the present invention includes a left and right pedal that linearly reciprocates in the vertical direction, and a rotation when the left and right pedals are depressed. A drive device that converts the motion into motion and drives the wheels, wherein the drive device includes two one-way clutches for alternately transmitting the rotational motion to the wheels when the left and right pedals are alternately depressed. It is characterized by the following.
[0007]
Therefore, when driving the wheels by converting the movement when the left and right pedals are depressed into rotational movement by the driving device, the two one-way clutches rotate the wheels only in the forward direction. In spite of the configuration in which the wheels reciprocate linearly, the wheels can be rotationally driven in the forward direction without any rotational unevenness.
[0008]
A traveling vehicle according to a second aspect of the present invention is the traveling vehicle according to the first aspect, wherein a main body frame rotatably supporting front and rear wheels, a steering mechanism for changing a direction of the front wheels with respect to the main body frame, A seat is provided on the upper and lower frames erected on the main body frame to support the driver, and the overall configuration is substantially I-shaped.
[0009]
That is, since the overall configuration including the seat and the frame is formed in a substantially I-shape, the configuration is simplified, and the overall size and weight of the traveling vehicle can be reduced.
[0010]
A traveling vehicle according to a third aspect of the present invention is the traveling vehicle according to the second aspect, wherein a supporting shaft for rotatably supporting the wheels is fixed to the main body frame via a vibration absorbing material. It is.
[0011]
Therefore, the vibration generated during traveling is absorbed by the vibration absorbing material that fixes the support shaft to the main body frame, so that transmission of the vibration to the main body frame is suppressed, and comfortable traveling can be performed.
[0012]
A traveling vehicle according to a fourth aspect of the present invention is the traveling vehicle according to the first, second, or third aspect, wherein the belt-shaped member rotates along a slope inclined forward and upward in front of the front wheels and in front of the rear wheels. It is characterized by having a free running.
[0013]
Therefore, when the traveling vehicle moves forward, if there is a climbing step, before the front wheel and the rear wheel hit the climbing step, the belt-shaped member whose front side is up hits the climbing step and rotates and travels. You can get over the climbing steps smoothly.
[0014]
A traveling vehicle according to a fifth aspect of the present invention is the traveling vehicle according to the first, second, third or fourth aspect, wherein the belt-shaped member is provided along an inclined surface inclined rearward and upward behind the front wheels and behind the rear wheels. Are rotatably run.
[0015]
Therefore, when there is a step when the traveling vehicle moves forward, before the front wheel and the rear wheel hit the lower surface of the step, the belt-shaped member whose rear side is raised hits the upper surface of the step and rotates and runs. It is possible to go down the step smoothly with a compact device.
[0016]
A traveling vehicle according to a sixth aspect of the present invention is the traveling vehicle according to the first, second, third or fourth aspect, wherein the steering mechanism is constituted by one lever.
[0017]
Therefore, since the direction of the front wheels is changed by one lever, the steering mechanism can be made compact.
[0018]
The invention according to claim 7 is the traveling vehicle according to claim 2, 3, 4, or 5, wherein the steering mechanism includes left and right operation levers that can swing up and down or back and forth. This is a configuration provided with a rotation direction conversion mechanism that converts the swing of the operation lever into horizontal rotation.
[0019]
Therefore, for example, it is possible to ride on the left and right operation levers with the left and right elbows attached, and to steer by operating the left and right elbows.
[0020]
According to an eighth aspect of the present invention, in the traveling vehicle according to any one of the second to seventh aspects, the seat is supported by upper and lower frames erected on the main body frame via a vibration absorbing material. It is characterized by the following.
[0021]
Therefore, the vibration generated during traveling is absorbed by the vibration-absorbing material, so that the transmission of the vibration to the seat can be suppressed, and comfortable traveling can be performed.
[0022]
A traveling vehicle according to a ninth aspect of the present invention is the traveling vehicle according to any one of the first to eighth aspects, wherein brake pedals to be depressed when stopping rotation of the front wheel and / or the rear wheel are provided on both left and right foot sides. The brake pedals on both the left and right feet operate integrally.
[0023]
Therefore, when stopping the traveling vehicle by stopping the rotation of the front wheel and / or the rear wheel, even if the right or left brake pedal is depressed, both brake pedals operate, so that braking can be reliably performed. it can.
[0024]
A traveling vehicle according to a tenth aspect of the present invention is a traveling vehicle in which a person is carried and the belt-shaped member is rotatable along a slope provided on a front side of wheels of the traveling vehicle so that the front is higher. It is a configuration provided.
[0025]
Therefore, even in the case of an ascending step which is relatively large as compared with the diameter of the wheel, it is possible to easily get on the vehicle.
[0026]
A traveling vehicle according to an eleventh aspect of the present invention is the traveling vehicle according to the tenth aspect, wherein the inclined surface is provided on the rear side of the wheels of the traveling vehicle so that the rear is higher. The belt-shaped member is provided so as to be rotatable and able to run along.
[0027]
Therefore, even if the descending step is relatively large compared to the diameter of the wheel, the person can easily descend.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the overall configuration of a bicycle 1 as an example of a traveling vehicle will be schematically described with reference to FIG.
[0029]
As can be understood from FIG. 1, a small-diameter front wheel 5 is rotatably supported on the front end side of one linear main body frame 3 that is long in the front-rear direction (left-right direction in FIG. 1). The direction can be freely changed by a steering wheel 7 as a steering mechanism. A small-diameter rear wheel 9 as a driving wheel is rotatably supported on the rear end side of the main body frame 3. Here, the front wheel 5 and the rear wheel 9 may have a configuration in which an elastic member such as a rubber 15 is attached to the outer periphery of the wheels 11 and 13 or a tire that injects air.
[0030]
An upper and lower frame 17 made of a square pipe material is provided upright at a substantially central portion in the longitudinal direction (front-back direction) of the main body frame 3, and a saddle 19, which is a seat for a driver, is provided above the upper and lower frames 17. Adjustably mounted. Further, the upper and lower frames 17 are provided with left and right pedals 21L and 21R which are depressed by the left and right feet so as to be vertically movable, and a drive mechanism for rotating the rear wheel 9 by depressing the pedals 21L and 21R. Driving device) 23 is provided. Note that the left and right pedals 21L, 21R are arranged on the same vertical plane without being located in front and rear.
[0031]
As understood from the above configuration, the overall configuration of the frame including the main body frame 3, the upper and lower frames 17, and the saddle 19 is substantially I-shaped, and the left and right pedals 21L and 21R are shifted in the front-rear direction. By arranging them in the same vertical plane in the left-right direction, the front-rear length of the body frame 3 can be reduced. Therefore, the entire frame can be simplified, and the overall configuration can be made compact and lightweight.
[0032]
2 and 12, the main body frame 3 integrally connects the central portions of the pair of left and right plates 25L and 25R by a connecting block 27, and the front end (the left end in FIG. 2) has a handle bearing 29. In between, the bolt 31 is penetrated and firmly fastened by a nut. Thereby, the main body frame 3 has a structure having high rigidity while being lightweight.
[0033]
2 and 3 to 6, a bolt hole 35 penetrates a connection block 33 provided integrally with the handle bearing 29 for attaching the handle bearing 29 to the front end of the main body frame 3. One of the bolt holes 35 is formed in a screw hole 37 and the other is formed as a simple through hole. Therefore, they are integrated by fasteners such as bolts 31 and nuts.
[0034]
An upper end of a joint shaft 39 whose lower part is bifurcated is rotatably supported by the handle bearing 29. The upper portion of a substantially triangular front wheel support plate 41 is sandwiched between the joint shafts 39, and the front wheel support plate 41 is integrally fixed by tightening the joint shaft 39 with bolts 43.
[0035]
The front wheel support plate 41 has a triangular shape protruding forward, and a front wheel support shaft 45 as a support shaft is fixed by screwing a nut 47 around a lower end portion of the front wheel support plate 41. The front wheel 5 is rotatably supported by the front wheel support shaft 45 via a bearing 46.
[0036]
A step climbing mechanism 49 is attached to the lower side of the front wheel support plate 41 in front of the front wheel 5. The step-over mechanism 49 mounts an oblong front belt guide 51 made of, for example, PC or nylon with a bolt 53 so as to be inclined so that the front side becomes higher, and rotates a sliding belt 55 on the outer peripheral surface of the front belt guide 51. It is a configuration provided to be able to run freely.
[0037]
The lowermost point PL on the rear end side of the front belt guide 51 is slightly higher than the lowermost point FL of the front wheel 5. Further, a belt retainer 57, which is a semi-elliptical plate, is attached to the outside of the front belt guide 51 (on the front side of the paper surface in FIG. 3) by bolts 59, and the front belt is rotated when the sliding belt 55 rotates. The guide 51 is supported so as not to fall off.
[0038]
Therefore, if there is a step ahead during traveling, the sliding belt 55 of the step overcoming mechanism 49 first hits the step, and rides on the step due to the rotational traveling of the sliding belt 55 due to inertia or the like during traveling (the direction of the arrow in FIG. 3). Even if the front wheel 5 has a small outer diameter or a relatively large step, the vehicle can smoothly get over the front wheel 5.
[0039]
By the way, the front belt guide 51 only needs to have an inclined lower surface, and its shape is not necessarily limited to an oval. The inclination of the front belt guide 51 can be adjusted by making the through hole through which the bolt 53 penetrates, for example, an elongated hole. And, by adopting the sliding belt 55, the length of the inclined surface of the portion riding on the stepped portion can be made relatively long, and even when the height difference between the front end side and the rear end side is relatively large, the inclination angle can be reduced. It can be suppressed to a small size and can easily get over relatively large steps.
[0040]
A handle shaft 61 as a lever is fixed to an upper end of a joint shaft 39 rotatably supported by the handle bearing 29. The upper end of the handle shaft 61 is appropriately bent forward (to the left in FIG. 3) to form the handle 7, and a grip 63 as shown in FIG. I have. The shape of the upper end portion of the handle shaft 61 may be, for example, bent in a crank shape.
[0041]
Next, referring to FIGS. 7 and 8 in addition to FIG. 2, the rear ends of the left and right plates 25L and 25R constituting the main body frame 3 are made of an elastic member such as urethane rubber which is a vibration absorbing material. A rear wheel support shaft 67, which is a support shaft, is fixedly supported via a bush 65, and bearings for rotatably supporting the left and right rear wheels 9L and 9R are provided at left and right ends of the rear wheel support shaft 67. 69 is attached by a bolt 71.
[0042]
Therefore, since the impact received by the rear wheels 9L and 9R during traveling is absorbed by the bush 65, the transmission of the impact to the main body frame 3 can be suppressed, and compared with the case where a spring member such as a spring is used. Thus, the size and weight can be reduced. Note that a similar bush may be provided between the front wheel support shaft 45 supporting the front wheel 5 and the front wheel support plate 41.
[0043]
Referring to FIG. 7, a wheel spacer 73 is attached to the inside (left side in FIG. 7) of the right rear wheel 9R rotatably supported by the rear wheel support shaft 67. A driven pulley 77 is rotatably attached to 73 via a bearing 75. The driven pulley 77 is integrally attached to the wheel 13 of the right rear wheel 9R by a plurality of bolts 79.
[0044]
Referring to FIG. 8, front and rear mounting portions 81F and 81R are provided on the rear end side between the left and right plates 25L and 25R so as to protrude downward, respectively. Is provided with a step climbing mechanism 83 having the same configuration as the step climbing mechanism 49 provided in the front wheel 5 described above. In this step overriding mechanism 83, a rear belt guide 85 made of, for example, an oval shape made of nylon is attached by a belt guide support shaft 87 so as to be inclined between the left and right plates 25L and 25R so that the front side is higher. A belt 89 that is slidable and rotatable is attached to the outer peripheral surface of the belt 85.
[0045]
Therefore, when the front wheel 5 rides over the step by the step overcoming mechanism 49 provided in front of the front wheel 5, the belt 89 of the step overcoming mechanism 83 provided in front of the rear wheel 9 abuts on the step, and travels. When the belt 89 rotates (indicated by an arrow in FIG. 8) due to inertia at the time, the rear wheel 9 can also smoothly climb over the step. Although a detailed illustration is omitted, the rear guide mechanism 83 is configured such that the inclination angle can be adjusted similarly to the front support mechanism 49 by making the hole through which the belt guide support shaft 87 penetrates and making the hole a long hole. is there. The height difference between the lowest point of the rear wheel 9 and the lowest point of the rear belt guide 85 can be adjusted.
[0046]
As described above, the step-over mechanism 49, 83 is provided on the front side of the front and rear wheels 5, 9, respectively, so that even if the front and rear wheels 5, 9 have a relatively small diameter, the diameter of the front and rear wheels 5, 9 is small. This makes it possible to get over a relatively large step portion. With the above configuration, the diameter of the wheel can be reduced, and the overall configuration can be reduced in size and weight.
[0047]
By the way, it is also possible to constitute a step overcoming mechanism using small wheels that are always in a slightly floating state, but in this case, it is possible to only go up to a step less than the height of the radius of the small wheels, The upper half of the small wheel will be wasted. In contrast, as described above, the endless belts are configured to be inclined so that the step-over mechanisms 49 and 83 are inclined, so that the inclination angle can be suppressed to be small even if the height difference between the front and rear is increased, and almost no waste is generated on the upper side. Since there are no unnecessary parts, the steps climbing mechanisms 49 and 83 can be reduced in size and weight.
[0048]
Referring to FIG. 2, the central portions of the left and right plates 25L and 25R constituting the main body frame 3 are integrally connected by welding via the connecting block 27 as described above. An attachment member 91 for supporting the plate 17 is attached to the inner surfaces of the plates 25L and 25R. Therefore, the upper and lower frames 17 are positioned by the connecting block 27 and the mounting member 91, and are firmly fixed to the main body frame 3 in the vertical direction by, for example, bolts. Therefore, the upper and lower frames 17 can be removed from the main body frame 3 by loosening the bolts.
[0049]
Referring to FIG. 1 and FIGS. 9 and 10 together, a drive mechanism 23 is provided at the upper end of the upper and lower frames 17. The drive mechanism 23 has support members 93 horizontally attached to the upper ends of the upper and lower frames 17 in the left and right directions (the left and right directions in FIG. 10). 95L and 95R are provided. The pedal support frames 95L, 95R have two base plates 97, 97 provided in parallel at regular intervals.
[0050]
A drive shaft 99 is provided at the upper end of the upper and lower frame 17 in the left-right direction in parallel with the support member 93 described above, and is rotatably supported by the bearing 101. Both ends of the drive shaft 99 are rotatably supported by the two base plates 97 described above, and the drive shaft 99 between the two base plates 97, 97 is provided in one direction (counterclockwise in FIG. 9). A one-way clutch 103, such as a so-called one-way clutch or the like, which transmits only the rotational force and allows the idle rotation in the other direction.
[0051]
A rear wheel drive pulley 105 is integrally mounted near the bearing 101 of the drive shaft 99, and the rear wheel drive pulley 105 and a driven pulley 77 (see FIG. 7), a timing belt 107 as an endless torque transmitting member is wound.
[0052]
Between the two base plates 97, 97 of the left and right pedal support frames 95L, 95R, a power transmission pulley 109 for winding a timing belt or the like via the one-way clutch 103 is integrated at both ends of the drive shaft 99. It is attached. In addition, a retainer 111 for preventing the power transmission pulley 109 from blurring is attached between the power transmission pulley 109 and the base plates 97, 97.
[0053]
A free pulley 113 meshing with the power transmission pulley 109 is rotatably provided on the rear side (the right side in FIG. 9) of the power transmission pulley 109 between the base plates 97, 97.
[0054]
Between the two base plates 97, 97, belt support rollers 115, 117 are rotatably provided at predetermined intervals or in contact with the power transmission pulley 109 and the free pulley 113. Further, a free roller 119 is rotatably provided in the upper right portion of the base plates 97, 97 in FIG. 9, and an idle roller 123 is rotatably supported by a support member 121 behind the free roller 119. I have.
[0055]
A bracket 125 having an L-shaped cross section is attached to the support plate 93 so as to protrude rearward, and a pulley 127 for a connecting rope is attached to the bracket 125 so as to be rotatable around a vertical axis.
[0056]
Then, a connection belt 129 such as an endless timing belt passes between the power transmission pulley 109 and the belt support roller 115 and between the free pulley 113 and the belt support roller 117, and is guided from the free roller 119 to the idle roller 123, One end of the connection belt 129 is hung on a stop pulley 131. A pedal 21L is attached to the connection belt 129 between the belt support rollers 115 and 117.
[0057]
By the way, the power transmission pulley 109 and the free pulley 113 meshed with each other are rotated in opposite directions to send out the connecting belt 129 of the same length downward or to lift it upward, so that the pedals 21L and 21R are actuated. Moves up and down while maintaining the parallelism.
[0058]
Although FIG. 9 shows the drive mechanism 23 on the left side (the right side in FIG. 10), the drive mechanism 23 on the right side has exactly the same structure. That is, the endless connection belt 129 is wound around in the same manner as the above-described configuration, and one end is attached to the stop pulley 131 and the other end is attached to the pedal 21.
[0059]
The stop pulleys 131 of the drive mechanisms 23 on the left and right sides are connected by a connecting rope 135 as a connecting member via a connecting block 133. That is, the connecting rope 135 is wound around a connecting rope pulley 127, and the blocks 133 are respectively connected to both ends thereof.
[0060]
With the above configuration, when the pedal 21L on one of the left and right sides (for example, the left side, see FIG. 9) is depressed, the other end of the connection belt 129 attached to the pedal 21L is pulled down, so that the connection belt 129 is attached to one end. One stop pulley 131 moves rightward in FIG. 9 and is further pulled up above the idle roller 123. As a result, the connecting rope 135 is pulled by the lowering of the left pedal 21L, so that the connecting belt 129 connected to the right pedal 21R via the other stop pulley 131 is pulled, and the right pedal 21R is raised.
[0061]
At this time, the power transmission pulley 109 is rotated in the counterclockwise direction in FIG. 9 by the movement of the connecting belt 129 connected to the left pedal 21L, which is the pedal 21 on the side to be stepped down. To rotate. As a result, the rear wheel drive pulley 105 rotates counterclockwise in FIG. 9 to cause the timing belt 107 to run in the direction of the arrow in FIGS. Move forward.
[0062]
On the other hand, the power transmission pulley (109) rotates clockwise in FIG. 9 by the movement of the connection belt (129) connected to the right pedal 21R, which is the ascending pedal 21, but the power transmission pulley (109). ) And the drive shaft 99, the one-way clutch (103) does not transmit the rotational force of the power transmission pulley (109) to the drive shaft 99, so that the propulsion force is increased only by the left pedal 21L that is stepped down. can get.
[0063]
That is, when the left and right pedals 21L and 21R are depressed alternately, the linear motion of the depressed pedal is converted into a rotary motion, and the drive shaft 99 is rotated only in one direction. Therefore, the drive shaft 99 is rotated so that there is no uneven rotation, and comfortable driving can be performed.
[0064]
By the way, the case where the endless belt 129 is used on both the left and right sides as a configuration for rotating the power transmission pulley 109 has been described, but the left and right belts 129 may be a single common belt. In this case, the pulley 131, the rope 135, and the like can be omitted, and the configuration can be further simplified. Further, the belt 129 is not limited to an endless shape, and may be a single belt having both ends.
[0065]
Next, the brake device 137 will be described with reference to FIGS. At the front ends of the left and right plates 25L, 25R in the main body frame 3, the left and right brake pedals centered on the left and right plates 25L, 25R and the brake pedal support shaft 139 that has passed through the through hole 35 of the connection block 33 in the left and right direction. 141L and 141R are provided rotatably up and down, and are normally urged upward by a torsion spring (not shown) or the like and are in a state of rising forward at a predetermined angle.
[0066]
The front ends of the left and right brake pedals 141L and 141R are rolled into a cylindrical shape and provided with a non-slip 143. The non-slip 143 is connected by a rod-shaped connecting member 145, and the left and right brake pedals 141L and 141R are integrated. It is designed to rotate. On the front surface of the handle bearing 29, a brake lock plate 147 for locking the brake pedals 141L and 141R while depressing the brake pedals is provided so as to be rotatable around the rotation shaft 149.
[0067]
A rear wire mounting portion 151 is provided at the rear of the brake pedal support shaft 139 of each of the brake pedals 141L and 141R so as to be bent upward, and the rear wire mounting portion 151 is provided with an inner core 153A of the rear brake wire 153. One end is attached. The rear brake wire 153 has one end of an outer cover 153B fixed by a rear brake wire bracket 155. When the brake pedal 141 is depressed, only the inner core 153A of the rear brake wire 153 is pulled.
[0068]
Further, a front wire mounting portion 157 (see FIG. 11) is provided below the rear wire mounting portion 151 and is bent downward below the rear wire mounting portion 151 behind the brake pedal support shaft 139 of the right brake pedal 141R. One end of the inner core 159A of the front brake wire 159 is attached to the wire attachment portion 157. The front brake wire 159 has one end of an outer cover 159B fixed by a front brake wire bracket 161. When the brake pedal 141 is depressed, only the inner core 159A of the front brake wire 159 is pulled.
[0069]
A front brake rotation shaft 163 is mounted on the left front surface of the joint shaft 39 which is rotatably mounted on the handle bearing 29. The front brake rotation shaft 163 covers the upper part of the front wheel 5. A front brake plate 165 is rotatably provided.
[0070]
The front brake plate 165 covers the front, upper and rear sides of the front wheel, and a front brake pad 167 is attached to the lower surface of the front portion 165F. The rear portion 165R of the front brake plate 165 also serves as a mudguard for the front wheels 5 to jump up during traveling. The front brake plate 165 is normally urged clockwise in FIG. 11 so as to open a predetermined gap between the front brake pad 167 and the front wheel 5.
[0071]
The other end of the front brake wire 159 is attached to a front brake wire bracket 169, and the other end of the inner core 159A is attached to a front portion 165F of the front brake plate 165.
[0072]
On the other hand, rear brake rotating shafts 171L and 171R are provided at the rear ends of the left and right plates 25L and 25R constituting the main body frame 3, respectively, and the rear brake rotating shafts 171L and 171R are respectively provided with rear brake plates 173L. , 173R are attached. The rear brake plates 173L and 173R are shaped to cover the front and upper sides of the rear wheel, and a rear brake pad 175 is attached to the inner surface (the right side in FIG. 11) of the front portion 173F. The upper portion 173U has a size that covers substantially the entire rear wheel 9, and also serves as a mudguard that the rear wheel 9 jumps up during running.
[0073]
One end of the rear brake wire 153 is connected to the left and right brake pedals 141L and 141R as described above, and the other end of the outer cover 153B of the rear brake wire 153 is attached to the rear of the body frames 25L and 25R. It is attached to the brake wire bracket 177. The other end of the inner core 153A is attached to left and right rear brake plates 173L and 173R on the opposite side of the rear brake pad 175 with respect to the rear brake rotation shafts 171L and 171R.
[0074]
Accordingly, when the brake pedals 141L and 141R are depressed forward and downward, the inner core 159A of the front brake wire 159 is pulled upward in FIG. 11 by the front wire mounting portion 157 provided on the right brake pedal 141R, and thus the front brake plate 165 rotates counterclockwise in FIG. 11 about the front brake rotation shaft 163 and presses the front brake pad 167 against the front wheel 5 to perform braking.
[0075]
At the same time, the inner core 153A of the rear brake wire 153 is pulled forward by the rear wire mounting portions 151 provided on the left and right brake pedals 141L and 141R, so that the rear brake plates 173L and 173R move the rear brake rotation shafts 171L and 171R. Rotating counterclockwise in FIG. 11 as the center, the rear brake pad 175 is pressed against the rear wheel 9 to perform braking.
[0076]
Since the left and right brake pedals 141L, 141R are integrally rotated by the connecting member 145, when one of the brake pedals 141L, 141R is depressed, the front brake plate 165 and both the left and right rear brake plates 173L, 173R are simultaneously. Operate. Even if only the left brake pedal 141L is depressed, the right brake pedal 141R rotates integrally, and the front brake plate 165 operates.
[0077]
In addition, when the brake lock plate 147 is hooked on the connecting member 145 with the brake pedals 141L and 141R depressed, all of the front brake plate 165 and the rear brake plates 173L and 173R can be locked in the braking state.
[0078]
That is, when one of the right and left brake pedals 141L and 141R is depressed, the brakes act on the front wheel 5 and the rear wheel 9 at the same time. Then, both the front and rear wheels 5, 9 can be locked in a braking state, so that the bicycle can be easily parked even on a slope, for example.
[0079]
FIGS. 14 and 15 show how the saddle 19 and the saddle support member 179 are attached to the upper and lower frames 17. The upper and lower frames 17 have a cylindrical shape with a square cross section, and the saddle support member 179 has a cylindrical shape that can be inserted into the upper and lower frames 17. At the upper end of the upper and lower frames 17, a multi-block 181 for fixing the saddle support member 179 to the upper and lower frames 17 by tightening is attached. The saddle 19 is set at a desired height, and bolts 183 of the multi-block 181 are attached. By tightening, the height of the saddle 19 can be adjusted.
[0080]
A cylindrical portion of a saddle stay 185 to which the saddle 19 is attached is fitted in the vicinity of the upper end of the saddle support member 179 so as to be vertically movable. It is integrally attached to a urethane damper 187 made of urethane rubber by a rod 188 crossing in an X shape. Support rods 189 and 189 pass through the lower end of the urethane damper 187 so as to intersect at right angles.
[0081]
The support rods 189 and 189 are shorter than the diagonal length of the inner surface of the upper and lower frames 17 and longer than the outer diameter of the saddle support member 179, so that the saddle support member 179 does not rotate.
[0082]
According to the above configuration, the vibration during traveling can be absorbed by the urethane damper 187 and the transmission of the vibration to the saddle 19 can be suppressed, so that comfortable traveling can be performed. Note that a saddle spacer 191 is inserted between the saddle stay 185 and the saddle support member 179 to prevent the saddle 19 from rattling.
[0083]
In addition, during transportation, the height of the bicycle 1 can be reduced to substantially close to the height of the upper and lower frames 17 by loosening the bolts 183 of the multi-block 181 and housing the saddle support members 179 inside the upper and lower frames 17. Therefore, it can be easily transported.
[0084]
With the above configuration, the size and weight of the bicycle 1 can be reduced and the bicycle 1 can be easily carried. In addition, even when there is a relatively large step, the vehicle can travel smoothly over the step.
[0085]
FIG. 16 shows a second embodiment of a drive mechanism (drive device) for converting the vertical linear reciprocating motion of the left and right pedals 21L and 21R into rotational motion and rotating the wheels in the forward direction. Components having the same functions as those of the driving device 23 described above are denoted by the same reference numerals, and redundant description will be omitted.
[0086]
In this drive device (drive mechanism) 23A, the drive shaft 99 rotatably supported by the left and right base plates 97 is formed in a pipe shape, and both right and left ends of the drive shaft 99 (both ends in the direction orthogonal to the paper surface in FIG. 16). The left and right power transmission pulleys 109 are rotatably supported via left and right one-way clutches 103, respectively.
[0087]
A left connecting belt 129L such as a chain or a timing belt is wound around the plurality of free pulleys 113 rotatably supported by the left and right base plates 97 and the left power transmission pulley 109L. One end of the connection belt 129L is held by an idler 130 so as not to be separated from the power transmission pulley 109L, and a left pedal 21L is connected to one end of the connection belt 129L.
[0088]
The other end of the connection belt 129L is connected to one end (left end) of a connection member 135 such as a rope. The connecting member 135 passes through the pipe-shaped drive shaft 99 in the left-right direction, and the left and right ends thereof are wound around a plurality of pulleys 127 rotatably supported on the left and right base plates 97, respectively. As described above, the left end of the connecting member 135 is connected to the connecting belt 129L.
[0089]
The other end side (right end side) of the connecting member 135 is wound around a plurality of pulleys 127 of the same configuration provided on the right base plate 97, and its end is connected to the left connecting belt 129L. The other end of the right connecting belt 129R having the same configuration and one end connected to the right pedal is connected.
[0090]
Therefore, when the left pedal 21L is depressed, the right connecting belt 129R is pulled via the left connecting belt 129L and the connecting member 135, and the right pedal is pulled up.
[0091]
When the left pedal 21L is depressed as described above, the drive shaft 99 and the drive pulley 105 rotate counterclockwise in FIG. 16 via the power transmission pulley 109L and the one-way clutch 103, and the rear wheel 9 via the belt 107. Will be rotated in the forward direction. At this time, the right connecting belt 129R is raised and the right power transmission pulley 109R is rotated in the opposite direction, but the one-way clutch 103 is interposed between the drive shaft 99 and the power transmission pulley 109R. Accordingly, the rotation of the transmission pulley 109R in the reverse direction is allowed.
[0092]
Conversely, when the right pedal in the raised state is depressed, the left pedal 21L is raised this time, but the drive shaft 99 is rotated in the same direction, and continuous rotation in the same direction is performed. It is obtained.
[0093]
According to the above configuration, since the drive shaft 99 is formed in a pipe shape and the connection member 135 penetrates the inside thereof, the drive unit 23A can be made more compact.
[0094]
FIG. 17 shows a second embodiment of a traveling vehicle. In this embodiment, left and right operation levers 201L and 201R are provided instead of the handle 7 shown in FIG. Since the configuration is the same as that of the traveling vehicle described above, portions having the same functions are denoted by the same reference numerals, and redundant description is omitted.
[0095]
The left and right operation levers 201L and 201R are supported by a bracket 203 provided on the upper portion of the saddle support member 179 so as to be swingable in a vertical direction or a front and rear direction via a pivot 205, respectively. In this embodiment, the left and right operation levers 201L, 201R are formed substantially in a crank shape, a Z shape, or the like, and the upper side is normally held horizontally so that the driver's elbow can be easily reached. ing. An end of the operation wire 207 is connected to a lower end of the operation lever 201L, 201R.
[0096]
The operation wire 207 is wound several times around a horizontal pulley 209 integrally attached to the upper end of the joint shaft 39 supporting the front wheel 5, and one end of the operation wire 207 is supported by the saddle support. The left and right operation levers 201L and 201R are connected to the left operation lever 201L via the left and right intermediate pulleys 211 mounted near the lower portion of the member 179, respectively.
[0097]
Therefore, when the left operation lever 201L is pressed down by the driver's left elbow, the left end of the operation wire 207 is pulled, and the joint shaft 39 is rotated leftward. Conversely, when the right operation lever 201R is pressed down by the right elbow, the joint shaft 39 is rotated rightward via the operation wire 207.
[0098]
In other words, the driver can easily perform the steering operation by setting the left and right operation handles 201L and 201R with both elbows in a comfortable posture.
[0099]
The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.
[0100]
Referring to FIG. 18, in the above-described embodiment, a step overriding mechanism 49 is attached to the lower side of the front wheel support plate 41 in front of the front wheel 5, but in the embodiment of FIG. The alternative front wheel support plate 213 has a substantially rhombic shape projecting forward and rearward, and the above-described step climbing mechanism 49 is attached to a lower side on the front side of the front wheel support plate 213, and a lower side on the rear side is provided on the lower side. A step descending mechanism 215 is attached.
[0101]
The step-down mechanism 215 is basically the same as the step-over mechanism 49 except that the elliptical second front belt guide 217 made of PC or nylon is raised at the rear side by bolts 219. And a sliding belt 221 is rotatably provided on the outer peripheral surface of the second front belt guide 217.
[0102]
The lowermost point QL on the front end side of the second front belt guide 217 is slightly higher than the lowermost point FL of the front wheel 5. Further, a belt retainer 223, which is a semi-elliptical plate, is attached to the outside of the second front belt guide 217 (on the front side of the paper surface in FIG. 18) by bolts 225, so that when the sliding belt 221 rotates, It is supported so as not to fall off from the second front belt guide 217.
[0103]
Therefore, when the front wheel 5 is disengaged from the upper surface of the descending step as shown in FIG. 20 when there is a descending step forward during traveling, the front wheel 5 first descends before landing on the lower surface of the descending step. The sliding belt 221 of the descending mechanism 215 collides with the upper surface (upper portion) of the descending step, and the front wheel 5 is lowered by the rotational traveling of the sliding belt 221 (in the arrow direction in FIGS. 18 and 20) as shown in FIG. Since the descending step descends until it lands on the lower surface, even the front wheel 5 having a small outer diameter or the descending step having a radius equal to or larger than the radius of the front wheel 5 can be smoothly descended.
[0104]
By the way, the second front belt guide 217 only needs to have an inclined lower surface, and its shape is not necessarily limited to an elliptical shape, and the inclination can be adjusted similarly to the front belt guide 51.
[0105]
The operation of the step overcoming mechanism 49 when climbing over a climbing step is as described in the above-described embodiment.
[0106]
Referring to FIG. 19, another embodiment of the rear wheel 9 is shown. The shape of the rear ends of the left and right plates 25L and 25R is such that a portion projecting rearward from the rear wheel 9 is provided. At the rear end side between the left and right plates 25L and 25R, front and rear mounting portions 81F and 81R are provided to protrude downward and forward from the rear wheel 9, respectively. Attachments 227F and 227R are provided to protrude downward. Further, the above-mentioned mounting portions 81F, 81R are provided with a step-override mechanism 83 similar to that of FIG. 8 of the above-described embodiment, and the above-mentioned mounting portions 227F, 227R are provided with the above-mentioned stepping mechanism provided on the front wheel 5. A step descending mechanism 229 having the same configuration as the descending mechanism 215 is provided.
[0107]
The step-down mechanism 229 is basically the same as the step-down mechanism 215. For example, a second rear belt guide 231 having an oval shape made of nylon is formed by a second belt guide support shaft 233 on the left and right plates 25L and 25R. The second rear belt guide 231 is provided with a sliding belt 235 that is slidable and rotatable on the outer peripheral surface of the second rear belt guide 231.
[0108]
Accordingly, when the front wheel 5 descends and descends the step by the step descending mechanism 215 provided behind the front wheel 5, the sliding belt 235 of the step descending mechanism 229 provided behind the rear wheel 9 then moves down the upper surface of the step. , And the sliding belt 235 rotates (indicated by an arrow in FIG. 19), so that the rear wheel 9 can also smoothly descend and go down a step. The operation state of the step lowering mechanism 229 at this time is the same as the operation of the step lowering mechanism 215 of the front wheel 5 shown in FIGS. 20 and 21, and therefore, detailed description is omitted.
[0109]
In addition, the rear step lowering mechanism 229 can be configured such that the inclination angle can be adjusted similarly to the front side step lowering mechanism 215.
[0110]
As described above, the step-over mechanism 49, 83 is provided on the front side of the front and rear wheels 5, 9, respectively, so that even if the front and rear wheels 5, 9 have a relatively small diameter, the diameter of the front and rear wheels 5, 9 is small. The front and rear wheels 5 and 9 have relatively small diameters by providing step down mechanisms 215 and 229 on the rear side of the front and rear wheels 5 and 9 respectively. Even in this case, it is possible to descend the descending step portion which is relatively large as compared with the diameters of the front and rear wheels 5 and 9. With the above configuration, the diameter of the wheel can be reduced, and the overall configuration can be reduced in size and weight.
[0111]
Note that, in the above-described embodiment, the case of a bicycle is described. However, the configurations of the step overcoming mechanisms 49 and 83 and the step descending mechanisms 215 and 229 are respectively applied to traveling vehicles such as tricycles and wheelchairs. Is also applicable.
[0112]
【The invention's effect】
As described above, in the traveling vehicle according to the present invention, since the two one-way clutches rotate the drive wheels only in the forward direction, the vehicle can be driven by rotating the drive wheels in the forward direction so as to prevent rotation unevenness. it can.
[0113]
Further, in the traveling vehicle according to the present invention, since the overall configuration of the frame is substantially I-shaped, the overall traveling vehicle can be reduced in size and weight.
[0114]
Further, in the traveling vehicle according to the present invention, the vibration generated on the wheels during traveling is absorbed by the vibration absorbing material, so that comfortable traveling can be performed.
[0115]
Further, in the traveling vehicle according to the present invention, before the front wheel and the rear wheel hit the climbing step, the belt-shaped member whose front side is rising rotates on the climbing step, so that it can smoothly climb over the climbing step.
[0116]
Further, in the traveling vehicle according to the present invention, before the front wheel and the rear wheel hit the lower surface of the step, the belt-shaped member whose rear side is raised rotates on the upper surface of the step, so that the vehicle can go down the step smoothly. .
[0117]
Furthermore, in the traveling vehicle according to the present invention, the direction of the front wheels can be changed by one lever, so that the steering mechanism can be made compact.
[0118]
Further, in the traveling vehicle according to the present invention, the operation lever can be operated by the left and right elbows, and the steering can be performed in a comfortable posture.
[0119]
Further, in the traveling vehicle according to the present invention, the vibration transmitted from the wheels at the time of traveling is absorbed by the vibration absorbing material supporting the seat, so that the transmission of the vibration to the seat can be prevented, and the vehicle can travel with good riding comfort.
[0120]
Also, in the traveling vehicle according to the present invention, even when the right or left brake pedal is depressed, both brake pedals operate, so that braking can be performed reliably and safe traveling can be performed.
[Brief description of the drawings]
FIG. 1 is a side view showing an overall configuration of a bicycle as an example of a traveling vehicle according to the present invention.
FIG. 2 is a side view showing a main body frame of the bicycle.
FIG. 3 is a side view showing a front wheel and a handle portion.
FIG. 4 is a rear view as viewed from an IV direction in FIG. 3;
FIG. 5 is a plan view seen from a direction V in FIG. 3;
FIG. 6 is an enlarged view of a blip.
FIG. 7 is a rear view of the rear wheel portion viewed from the rear.
FIG. 8 is a side view as viewed from a direction VIII in FIG. 7;
FIG. 9 is a side view showing a driving device that drives a driving wheel by converting a linear reciprocating motion of a pedal into a rotary motion.
FIG. 10 is a front view as viewed from the X direction in FIG. 9;
FIG. 11 is a side view showing the brake device.
FIG. 12 is a plan view of the brake device as viewed from a direction XII in FIG. 11;
FIG. 13 is a rear view of the brake device as viewed from a direction XIII in FIG. 11;
FIG. 14 is a cross-sectional view showing a saddle attachment portion.
15 is a sectional view taken along line XV-XV in FIG.
FIG. 16 is an explanatory diagram showing a second embodiment of the driving device.
FIG. 17 is an explanatory diagram showing a second embodiment of the traveling vehicle.
FIG. 18 is a side view of a front wheel portion showing another embodiment.
FIG. 19 is a side view of a rear wheel portion showing another embodiment.
FIG. 20 is a state explanatory view showing the operation of the step descending mechanism.
FIG. 21 is a state explanatory view showing the operation of the step descending mechanism.
[Explanation of symbols]
1 Bicycle (running car)
3 Body frame
5 front wheels
7 steering wheel (steering mechanism)
9 Rear wheel (drive wheel)
17 Upper and lower frames
19 saddle (seat)
21L, 21R pedal
23 Drive
37, 65 bush (vibration absorbing material)
45 Front wheel support shaft (support shaft)
51 Front belt guide (inclined surface)
55 Sliding belt (belt-like member)
61 Handle shaft (lever)
67 Rear wheel support shaft (support shaft)
85 Rear belt guide (inclined surface)
89 Flat belt (belt-like member)
103 one-way clutch
141L, 141R Brake pedal
215 Stepping down mechanism (front wheel side)
217 Second front belt guide (inclined surface)
221 Sliding belt (belt-like member) 229 Step-descent mechanism (rear wheel side)
231 2nd rear belt guide (inclined surface)
235 Sliding belt (belt-like member)

Claims (11)

Left and right pedals that reciprocate linearly in the vertical direction, and a driving device that converts the movement of the left and right pedals when depressed into rotary motion to drive the wheels, wherein the driving device rotates when the left and right pedals are depressed. A traveling vehicle having two one-way clutches for transmitting the driving force to the wheels. A main body frame rotatably supporting front and rear wheels, a steering mechanism for changing the direction of the front wheels with respect to the main body frame, and a seat provided on upper and lower frames erected on the main body frame to support a driver; The traveling vehicle according to claim 1, wherein the traveling vehicle has a general I-shape. The traveling vehicle according to claim 2, wherein a support shaft rotatably supporting the wheel is fixed to the main body frame via a vibration absorbing material. The traveling vehicle according to claim 1, 2 or 3, further comprising a belt-shaped member rotatably traveling along an inclined surface inclined forward and upward in front of the front wheels and in front of the rear wheels. The traveling vehicle according to any one of claims 1, 2, 3, and 4, further comprising a belt-shaped member rotatably traveling along a slope inclined rearward and upward behind the front wheels and behind the rear wheels. The traveling vehicle according to claim 2, 3, 4, or 5, wherein the steering mechanism is constituted by one lever. The steering mechanism includes left and right operation levers that are swingable in a vertical direction or a front and rear direction, and a rotation direction conversion mechanism that converts the swing of the left and right operation levers into a horizontal rotation. The traveling vehicle according to claim 2, 3, 4, or 5, wherein: The traveling vehicle according to any one of claims 2 to 7, wherein the seat is supported by upper and lower frames erected on the main body frame via a vibration absorbing material. A brake pedal which is depressed when stopping rotation of the front wheel and / or the rear wheel is provided on both left and right feet, and the brake pedals on both left and right feet are operated integrally. The traveling vehicle according to any one of the above. 1. A traveling vehicle carrying a human being, wherein a belt-shaped member is rotatably provided on a front side of wheels of the traveling vehicle along an inclined surface provided so as to be higher in front. A traveling vehicle carrying a human being, wherein a belt-shaped member is rotatably provided on a rear side of wheels of the traveling vehicle along an inclined surface provided so that a rear portion thereof is high. The traveling vehicle according to claim 10.

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