JP2009208491A - Rotary drive and bicycle furnished with this - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary drive with a small number of parts and simple in structure. <P>SOLUTION: This rotary drive is constituted by axially installing a rotation axis 3 in a device body 2, mounting two front and rear pinions 4, 5 on the rotation axis 3 through one-way clutches 6, 7 respectively having the same orientation, arranging a rack 8 to be engaged with the pinion 4 and a pair of right and left vertical frames 10, 11 having a rack 9 to be engaged with the other pinion 5 on both of right and left sides of both the pinions 4, 5, forming a portal elevating frame body 13 by connecting both of the right and left vertical frames 10, 11 to each other by a connecting frame 12 and interposing a spring 14 for raising and returning the elevating frame body between the connecting frame 12 of this elevating frame body 13 and the device body 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotary drive device and a bicycle equipped with the rotary drive device.

  There is a known battery-assisted bicycle that uses a battery (storage battery) to turn a motor (electric motor) to assist human power. However, it takes time to charge the battery, and it is charged frequently because the battery life is short. Need to do.

  The present invention has been made in view of the above-described problems.For example, a linear motion generated by a person riding a bicycle repeatedly sitting on the saddle and lifting the waist is converted into a rotational motion. It is an object of the present invention to provide a rotation drive device that outputs a rotation drive force, and a bicycle including the rotation drive device.

  Means for solving the above problems will be described with reference numerals in the embodiments described later. The rotary drive device according to claim 1 is configured such that the rotary shaft 3 is mounted in the device main body 2 and the rotary shaft 3 is mounted. The two front and rear pinions 4 and 5 are attached via one-way clutches 6 and 7 having the same direction, and the rack 8 and the other pinion meshing with one pinion 4 are provided on the left and right sides of both pinions 4 and 5. A pair of left and right vertical frames 10 and 11 having a rack 9 meshing with 5 are disposed so as to be movable up and down, and both left and right vertical frames 10 and 11 are coupled by a coupling frame 12 to form a portal-shaped lifting frame body 13, When an elevating frame body raising return spring 14 is interposed between the connecting frame 12 of the elevating frame body 13 and the apparatus main body 2, and when the elevating frame body 13 is pushed down against the urging force of the spring 14, One of the pinions 4 rotates in the positive direction, and the rotation shaft 3 is The other pinion 5 idles in the opposite direction, releases its pushing down force, and when the lifting frame 13 is lifted by the spring biasing force, the one pinion 4 idles in the opposite direction and the other pinion 5 is rotated in the forward direction, and the rotating shaft 3 is continuously rotated in the forward direction. Thereafter, the lifting frame 13 is moved up and down, whereby the rotating shaft 3 is continuously rotated.

  According to a second aspect of the present invention, in the rotary drive device according to the first aspect, the elevating and lowering frame body lifting return spring 14 is interposed between the upper surface of the apparatus main body 2 and the connecting frame 12 of the elevating and lowering frame body 13. It consists of a compression coil spring.

  In the bicycle according to the third aspect of the present invention, the device main body 2 of the rotary drive device 1 according to the first or second aspect is fixed to the vertical pipe 19 constituting a part of the frame 18 of the bicycle, and the vertical pipe 19 is The lift frame 13 of the rotary drive device 1 is connected to the saddle post 20 that is slidable up and down slidably through the connecting arm 21 and the sprocket 22 that is linked to the rotary shaft 3 of the rotary drive device 1 is connected. The bicycle user meshes with the bicycle chain 23, and the bicycle user repeats the operation of putting his / her weight on the saddle 24 attached to the upper end portion of the saddle post 20 and the operation of lifting his / her waist and not putting the weight. By raising and lowering the elevating frame 13 of the driving device 1, the rotating shaft 3 is continuously rotated, and the bicycle chain 23 is driven forward by the rotation of the sprocket 22. And features.

  According to a fourth aspect of the present invention, in the bicycle according to the third aspect, the sprocket 22 is integrally attached to the rotary shaft 3 of the rotary drive device 1.

  According to a fifth aspect of the present invention, in the bicycle according to the third aspect, the sprocket 22 is rotatably attached to the rotary shaft 3 of the rotary drive device 1, and one end portion of the rotating lever 37 is fixed to the rotary shaft 3. Between the other end of the rotation lever 37 and the sprocket 22, a spring 40 that receives a compression action when the rotation lever 37 rotates due to the rotation of the rotary shaft 3 by the lifting and lowering of the lifting frame 13 is interposed. The sprocket 22 is rotated via the compression biasing force of the spring 40.

  According to a sixth aspect of the present invention, in the bicycle according to the third aspect, the sprocket 22 is rotatably attached to the rotary shaft 3 of the rotary drive device 1, and the longitudinal center portion of the rotary rod 43 is fixed to the rotary shaft 3. Between the one side of one end of the rotating rod 43 and the sprocket 22 and between the other side of the other end of the rotating rod 43 and the sprocket 22, a rotary shaft is formed by raising and lowering the lifting frame 13. 3, springs 40 and 40 that are compressed when the turning rod 43 is rotated by the rotation of 3 are interposed, and the sprocket 22 is rotated through the compression biasing force of both the springs 40 and 40. It is characterized by.

  A seventh aspect of the present invention is the bicycle according to the fifth or sixth aspect, wherein the spring 40 is a compression coil spring.

  The effect of the invention by the above solution will be described with reference numerals in the embodiments described later. According to the rotary drive device 1 of the invention according to claim 1, the connection frame 12 of the elevating frame body 13 is periodically attached to the connection frame 12. The elevating frame 13 can be raised and lowered to rotate the rotary shaft 3 continuously by a simple operation that only applies a pressing force. In addition, since the rotational drive device 1 has a small number of parts and a simple structure, the entire device can be reduced in size and manufactured at low cost.

  According to the second aspect of the present invention, the spring 14 for returning and raising the lifting frame body is preferably a compression coil spring interposed between the upper surface of the apparatus body 2 and the connecting frame 12 of the lifting frame body 13.

  According to the bicycle of the third aspect of the present invention, when the user sits down on the saddle 24 and puts his / her weight on the saddle post 20, the load applied to the saddle post 20 acts on the lifting / lowering frame 13 of the rotary drive device 1. 13 is pushed down, the rotating shaft 3 rotates to rotate the sprocket 22 in the same direction, the chain 23 is driven in the forward direction, and when the user floats up, the load is not applied to the saddle 24. Since the lifting frame 13 and the saddle post 20 are returned to the ascending limit position by the biasing force of the spring 14 of the driving device 1 and the lifting frame 13 is lifted, the rotating shaft 3 continues to rotate in the same direction. To drive the chain 23 and rotate the rear wheel 29 in the forward direction of the bicycle. Therefore, this bicycle with a rotation drive device needs to be charged like a conventional battery-assisted bicycle, so it does not take time and is very economical.

  As described in claim 4, the sprocket 22 can be integrally attached to the rotary shaft 3 of the rotary drive device 1.

  If the rotation lever 37 is rotated by the rotation of the rotating shaft 3 to compress the spring 40 and the sprocket 22 is rotated via the compression biasing force of the spring 40 as described in claim 5, When a large forward driving force is required for the bicycle chain 23 as when traveling on a hill, the rotary shaft 3 is rotated by the lifting and lowering of the lifting and lowering frame 13, and the rotating lever 37 is rotated to compress and compress the spring 40. Since the urging force is accumulated, a large rotational torque is obtained in the sprocket 22 by the accumulated compression urging force, and the chain 23 can be driven strongly.

  According to the sixth aspect, the springs 40 and 40 are interposed between one side surface of the rotating rod 43 and the sprocket 22 and between the other side surface of the rotating rod 43 and the sprocket 22. In this case, the compression urging force accumulated in the compression spring 40 is twice that of the rotation lever 37 of claim 5, so that a large rotational torque is obtained by the sprocket 22 and the chain 23 is driven more strongly. be able to.

  As described in claim 7, the spring 40 is preferably a compression coil spring.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a perspective view showing a rotary drive device 1 according to the present invention, and (b) is an XX line of (a). 2 (a) is a cross-sectional view taken along line YY in FIG. 1 (a), showing a state in which the lifting frame is in the upper limit position, and FIG. 2 (b) is the same. FIG. 9 is a cross-sectional view showing a state where the lifting frame body is at the lower limit position.

  In this rotary drive device 1, a rotary shaft 3 is mounted in a device body 2 by means of a bearing 15, and two front and rear pinions 4 and 5 are respectively attached to the rotary shaft 3 with the same directionality. A pair of left and right vertical frames 10 and 11 having a rack 8 meshing with the front side pinion 4 and a rack 9 meshing with the rear side pinion 5 are arranged on the left and right sides of both pinions 4 and 5 so as to be movable up and down. At the same time, the left and right vertical frames 10 and 11 are connected by a connecting frame 12 to form a gate-shaped elevating frame 13, and the elevating frame is raised between the connecting frame 12 of the elevating frame 13 and the apparatus body 2. When the elevating frame 13 is pushed down against the urging force of the spring 14, the front pinion 4 rotates clockwise as indicated by an arrow A in FIGS. Rotate in the positive direction and rotate the rotating shaft 3 clockwise (in the positive direction) At this time, the pinion 5 on the rear side idles counterclockwise (reverse direction) indicated by an arrow B in FIGS. 1 and 2, and the pressing force on the lifting frame 13 is released so that the lifting frame 13 is attached with the spring 14. When lifted by the force, the front-side pinion 4 idles counterclockwise, the rear-side pinion 5 rotates clockwise, and the rotating shaft 3 continues to rotate in the forward direction. As a result, the rotating shaft 3 rotates continuously.

  2 (a) and 2 (b) are cross-sectional views taken along line YY in FIG. 1 (a), but the front-side pinion 4 and the rack 8 of the right vertical frame 10 Is shown in the right half, and the state in which the rear pinion 5 and the rack 9 of the left vertical frame 11 are engaged is shown in the left half.

  The configuration of the rotary drive device 1 will be described in more detail. The one-way clutch 6 interposed between the rotation shaft 3 and the front side pinion 4 and the rotation shaft 3 and the rear side pinion 4 are interposed. The provided one-way clutch 7 is arranged so that both have the same directionality. That is, both the clutches 6 and 7 are claw-type or cam-type one-way clutches that transmit power only in one clockwise direction, for example, and run counterclockwise in the other direction. When the part-side pinion 4 rotates clockwise, the rotation is transmitted to the rotating shaft 3 to rotate the rotating shaft 3 clockwise, and when rotated counterclockwise, it rotates idly and does not transmit the rotation to the rotating shaft 3. The clutch 7 is also the same. When the rear-side pinion 5 rotates clockwise, the rotation is transmitted to the rotation shaft 3 to rotate the rotation shaft 3 clockwise, and when it rotates counterclockwise, it rotates idly. Yes.

  The lifting / lowering frame body spring 14 is composed of a compression coil spring interposed between the upper surface 2 a of the apparatus body 2 and the connecting frame 12 of the lifting / lowering frame body 13. The body 13 is returned to the ascending limit position. In this case, an ascent limit position limiting stopper 16 is provided so that the elevating frame body 13 does not protrude beyond the ascent limit position. The stopper 16 is formed of a bolt, and the bolt 16 is inserted into bolt insertion holes 17 provided at both ends of the connecting frame 12 of the elevating frame body 13 and the lower end screw portion 17b is screwed into the apparatus main body 2. Thus, the head 16 a of the bolt 16 is locked to the connecting frame 12 of the elevating frame body 13 at the rising limit position of the elevating frame body 13.

  When the rotary drive device 1 having the above-described configuration is used, when the connecting frame 12 of the elevating frame body 13 is pushed down against the urging force of the coil spring 14 from the state shown in FIG. 2, the front-side pinion 4 rotates clockwise as indicated by arrow A in FIG. 2 to rotate the rotary shaft 3 in the same clockwise direction. At this time, the rack 9 on the vertical frame 11 side By the movement, the rear side pinion 5 idles counterclockwise as indicated by an arrow B in FIG.

  After the elevating frame 13 is lowered to the lower limit position in this way, when the pressing force on the elevating frame 13 is released, the elevating frame 13 is raised by the urging force of the coil spring 14, but at this time the rack on the vertical frame 10 side is raised. 2, the front-side pinion 4 idles counterclockwise as indicated by arrow B in FIG. 2, and the rear-side pinion 5 rotates clockwise as indicated by arrow A in FIG. And the rotating shaft 3 continues to rotate clockwise.

  Therefore, the rotating shaft 3 can be continuously rotated by repeatedly performing the raising / lowering operation | movement of the raising / lowering frame 13 as mentioned above. That is, the rotary drive device 1 performs the vertical linear motion of the elevating frame 13 on the racks 8 and 9 of the left and right vertical frames 10 and 11 and the front and rear pinions 4 and 5 that mesh with the racks 8 and 9. The one-way clutches 7 and 8 interposed between the pinions 4 and 5 and the rotary shaft 3 constitute a motion conversion mechanism that converts the rotary shaft 3 into a rotary motion that continuously rotates.

  According to the rotational drive device 1 as described above, the rotary shaft 3 is continuously moved up and down by a simple operation that only applies a pressing force to the connecting frame 12 of the lift frame body 13 periodically. Can be rotated. In addition, since the rotational drive device 1 has a small number of parts and a simple structure, the entire device can be reduced in size and manufactured at low cost.

  FIG. 3 (a) shows a bicycle equipped with the rotational drive device 1. The lifting / lowering frame 13 of the rotational drive device 1 can be obtained by repeatedly applying or removing weight to the saddle by the bicycle user. By raising and lowering, the rotating shaft 3 is continuously rotated to drive the bicycle chain forward, thereby assisting human power.

  In order to install the rotary drive device 1 on a bicycle, the main body 2 of the rotary drive device 1 is placed on the back side of a rectangular tube-like standing tube (also called a seat tube) 19 constituting a part of the diamond frame 18 of the bicycle. Is attached and fixed by a clamp 25, and the elevating frame body 13 is interlocked and connected to a square cylindrical saddle post 20 inserted into the vertical pipe 19 so as to be slidable up and down from above. The sprocket 22 that is coaxially attached to the rotary shaft 3 and can be integrally rotated is meshed with the chain 23 of the bicycle, so that the bicycle user can connect the saddle 24 attached to the upper end of the saddle post 20 to the saddle 24. The rotary shaft 3 is moved up and down by repeatedly raising and lowering the lifting and lowering frame body 13 by repeatedly lowering the waist and putting the weight on and lifting the waist and not putting the weight on. By continued rotation, in which so as to advance drive the bicycle chain 23 by the rotation of the sprocket 22. When the bicycle is not used, the elevating frame 13 of the rotary drive device 1 is in the ascending limit position.

  As shown in FIG. 3 (b), sliding members 26 are respectively attached to the four side surfaces of the square cylindrical saddle post 20 at two upper and lower portions, and the saddle post 20 is raised and lowered in the vertical pipe 19. Can be done smoothly. In addition, the connecting arm 21 has a base end portion that projects into the lower end side of the saddle post 20 and is integrally fixed so as to be perpendicular to the saddle post 20. It slides up and down along the guide groove 27 formed in the side wall. The distal end portion of the connecting arm 21 is connected and fixed to the connecting frame 12 of the elevating frame body 13.

  In the use of this bicycle, the user straddles the saddle 24 and puts both feet on the pedals 28 and 28 and puts his / her weight on the saddle 24 and lifts his / her waist and does not put the weight. By alternately performing the operation and raising and lowering the elevating frame 13, the rotating shaft 3 can be continuously rotated and the chain 23 of the bicycle can be driven forward by the rotation of the sprocket 22.

  That is, when the user sits down and puts weight on the saddle 24, the load applied to the saddle post 20 acts on the lifting frame 13 of the rotary drive device 1 via the connecting arm 21 to push down the lifting frame 13. The rotating shaft 3 rotates in the direction of the arrow in FIG. 3 to rotate the sprocket 22 in the direction of the arrow in the same figure, drives the chain 23 in the direction of the arrow in the same figure, rotates the rear wheel 29 in the forward direction of the bicycle, and Since the load is not applied to the saddle 24, the lifting frame 13 and the saddle post 20 are returned to the ascending limit position by the biasing force of the coil spring 14 of the rotary drive device 1, and the lifting frame 13 is lifted. In this case, the rotating shaft 3 continues to rotate in the same direction. Therefore, the sprocket 22 is rotated, the chain 23 is driven, and the rear wheel 29 is rotated in the bicycle forward direction.

  In addition, the user steps on the pedal 28 with both feet and drives the chain 23 with the pedaling force, repeatedly performing the operation of sitting down and floating on the saddle 24 as described above to rotate the rotating shaft 3. Thus, the sprocket 22 may be rotated to apply a driving force to the chain 23. By doing so, a large chain driving force can be obtained with a relatively small pedal effort, and the vehicle can travel easily on a slope. In FIG. 3, 30 is a front wheel, 31 is a handle frame, 32 is an upper tube of the diamond frame 18, 33 is a lower tube, 34 is a head tube, and 35 is a chain stay.

  In the bicycle described with reference to FIG. 3 (a), a sprocket 22 is attached to the rotary shaft 3 of the rotary drive device 1 so as to be rotatable integrally with the rotary shaft 3, and the sprocket 22 is directly rotated by the rotation of the rotary shaft 3. The embodiment of the chain mechanism has been shown. In FIGS. 4A and 4B, the sprocket 22 is rotatably attached to the rotary shaft 3 of the rotary drive device 1 via the bearing 36, and the rotary shaft thereof. 3, one end portion of the rotation lever 37 is fixed, and between the other end portion of the rotation lever 37 and a spring mounting piece 39 attached to the sprocket 22 with a fixing bolt 38, the lifting frame body 13 is arranged. A compression coil spring 40 that receives a compression action when the rotation lever 37 is rotated by the rotation of the rotary shaft 3 by raising and lowering is interposed, and the sprocket 22 is rotated via the compression biasing force of the coil spring 40, It shows an embodiment of the sprocket chain mechanism to drive the chain 23 in the forward direction by the rotation of the sprocket 22. In order to fix one end of the rotation lever 37 to the rotary shaft 3, a shaft insertion hole 41 provided at one end of the rotation lever 37 is inserted into the rotation shaft 3, and the rotation shaft 3 and the shaft insertion hole 41 are connected. What is necessary is just to insert the key 42 in between.

  As in the embodiment shown in FIGS. 4A and 4B, the rotating lever 37 is rotated by the rotation of the rotating shaft 3 to compress the compression coil spring 40, and the compression biasing force of the coil spring 40 is used. When the sprocket 22 is rotated, when a large forward drive force is required for the bicycle chain 23, such as when traveling on a slope, the rotating shaft 3 is rotated by the lifting and lowering of the lifting and lowering frame 13, and the rotating lever 37 is moved. By rotating, the coil spring 40 is compressed and accumulates a compression urging force, so that the accumulated compression urging force provides a large rotational torque to the sprocket 22 and can drive the chain 23 strongly.

  Further, in FIG. 5, the sprocket 22 is rotatably attached to the rotary shaft 3 of the rotary drive device 1, and a central portion in the longitudinal direction of the rotary rod 43 is fixed to the rotary shaft 3. Between one side of one end and a spring mounting piece 39 attached to the sprocket 22 with a fixing bolt 38, and to the other side of the other end of the rotary rod 43 and a spring mounting piece 39 attached to the sprocket 22 with a fixing bolt 38 Between them, compression coil springs 40, 40 that receive a compression action when the rotary rod 43 is rotated by the rotation of the rotary shaft 3 due to the lifting and lowering of the lifting frame 13 are interposed, respectively. A sprocket / chain mechanism is shown in which a sprocket 22 is rotated via a compression urging force, and the chain 23 is driven in the forward direction by the rotation of the sprocket 22.

  Like the sprocket / chain mechanism shown in FIG. 5, a compression spring is provided between one side of one end of the rotary rod 43 and the sprocket 22 and between the other side of the other end of the rotary rod 43 and the sprocket 22. When 40 and 40 are respectively inserted, the compression urging force accumulated by the compression spring 40 is twice that in the case of FIGS. 4A and 4B, so that a larger rotational torque can be obtained in the sprocket 22. The chain 23 can be driven more powerfully.

(a) is a perspective view which shows the rotational drive apparatus based on this invention, (b) is XX sectional drawing of (a). (a) is a cross-sectional view taken along line YY in FIG. 1 (a), showing the state where the lifting frame is in the upper limit position, and (b) is a similar sectional view showing the lifting frame. Indicates a state where is in the lower limit position. (a) is a side view showing a bicycle with a rotary drive device according to the present invention, (b) is an enlarged sectional view taken along line ZZ of (a). (a) is the front view which shows embodiment of a sprocket chain mechanism, (b) is the VV sectional view taken on the line of (a). It is a front view which shows embodiment of another sprocket chain mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation drive apparatus 2 Apparatus main body 3 Rotating shaft 4, 5 Pinion 6, 7 One-way clutch 8, 9 Rack 10, 11 Vertical frame 12 Connection frame 13 Lifting frame body 14 Spring 18 Bicycle frame 19 Frame vertical tube 20 Saddle post 21 Connecting arm 22 Sprocket 23 Chain 24 Saddle

Claims (7)

  A rotating shaft is mounted in the apparatus body, and two front and rear pinions are attached to the rotating shaft via one-way clutches having the same direction, and a rack that meshes with one pinion on the left and right sides of both pinions and the other A pair of left and right vertical frames having racks meshing with the pinion of the pinion are arranged to be movable up and down, and both left and right vertical frames are connected by a connecting frame to form a gate-shaped lifting frame body. When a spring for raising and lowering the lifting / lowering frame body is interposed between the main body and the lowering / lowering frame body is pushed down against the biasing force of the spring, one of the pinions rotates in the positive direction and rotates. When the shaft is rotated in the forward direction, the other pinion is idled in the opposite direction, and when the lifting frame is lifted by the spring biasing force by releasing the push-down force, the one pinion is idled in the opposite direction and the other pinion Rotates in the positive direction and the rotation axis continues to be square Rotate the, by subsequent lifting frame is raised and lowered, the rotary drive device rotating shaft is adapted to rotate continuously.   The rotary drive device according to claim 1, wherein the elevating frame body lifting return spring includes a compression coil spring interposed between the upper surface of the apparatus main body and the connecting frame of the elevating frame body.   An apparatus main body of the rotary drive device according to claim 1 or 2 is fixed to a vertical pipe constituting a part of a bicycle frame, and a saddle post inserted into the vertical pipe from above so as to be slidable up and down is connected via a connecting arm. The lift frame of the rotary drive device is connected to be freely movable, and the sprocket linked to the rotary shaft of the rotary drive device is meshed with the bicycle chain so that the bicycle user can attach it to the saddle attached to the upper end of the saddle post. On the other hand, by repeating the operation of lowering the waist and applying the weight and the operation of lifting the waist and not applying the weight, by raising and lowering the lifting frame body of the rotation drive device, the rotation shaft is continuously rotated, and the sprocket is rotated. A bicycle that drives the bicycle chain forward.   The bicycle according to claim 3, wherein the sprocket is integrally attached to a rotation shaft of a rotation drive device.   The sprocket is rotatably attached to a rotating shaft of a rotary drive device, and one end of a rotating lever is fixed to the rotating shaft, and the lifting frame body is between the other end of the rotating lever and the sprocket. 4. The bicycle according to claim 3, wherein a spring that receives a compression action when a rotation lever rotates by rotation of a rotation shaft by raising and lowering the wheel is interposed, and the sprocket is rotated by a compression biasing force of the spring. .   The sprocket is rotatably attached to the rotation shaft of the rotary drive device, and the central portion in the longitudinal direction of the rotary rod is fixed to the rotary shaft. Between the other side surface of the other end of the moving rod and the sprocket, springs that receive a compression action when the rotating rod is rotated by the rotation of the rotating shaft due to the lifting and lowering of the lifting frame body are interposed, respectively. 4. The bicycle according to claim 3, wherein the sprocket is rotated via a compression biasing force of both springs.   The bicycle according to claim 5 or 6, wherein the spring is a compression coil spring.

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