TWI625268B - Bicycle energy storage device - Google Patents

Abstract

The invention relates to a bicycle energy storage and labor saving device, which comprises a cam rotating in conjunction with a bicycle pedal, a spring lifting assembly abutting against the cam, and a set of clutches. When the user is more relaxed by riding the bicycle, the cam starts to enter the lift to store the energy of the elastic lifting assembly; when the user applies a relatively difficult stroke, the cam enters the descending motion, so that the elastic lifting assembly can release energy. It assists the user to step on the force to save effort and reduce the knee injury. In addition, the clutch disengagement enables the elastic lifting assembly to be actuated or not, thereby allowing the user to select whether or not to store energy when riding the bicycle, overcoming the implementation problems of various known energy storage devices.

Description

Bicycle energy storage device

The invention relates to an energy-saving and labor-saving device installed on a bicycle, and relates to a crank structure, a cam, a spring and a clutch of a bicycle, which allows the user to store energy during a relatively easy stroke during the riding of the bicycle, and The kinetic energy is saved during the relatively difficult stroke of the force, and the clutch can be used to allow the user to select whether or not energy storage is required.

As is known to all, the bicycle is driven by the user to step on the pedal at the end of the crank structure, so that the crank structure drives the front gear to rotate, and the chain gear is used to drive the rear gear of the rear wheel to rotate, thereby driving the rear wheel of the bicycle to rotate. Travel forward.

As shown in the first figure and the second figure, the crank structure of the bicycle includes a left crank 1 and a right crank 2 arranged at 180 degrees, and the pedals provided at the ends of the left crank 1 and the right crank 2 are biased ends for the pedals to be provided. The user applies a force to the crank structure.

For example, the pedal of the left crank 1 is defined as 0 degrees directly above the axis 4 of the crank structure 3. Since the bicycle seat is located above the shaft center 4, the force of the left crank 1 is from the pedal at about 270 to 0 degrees. Start, to the end of 150 ~ 180 degrees, a total of 180 degrees of stroke in the force.

When the left crank 1 is rotated to 150 to 180 degrees, the pedal of the right crank 2 is located at 270 to 0 degrees, and the right crank 2 is forced from then on. Thus, by the left crank 1 and the right crank 2, the left and right feet of the user are alternately stepped on by 360 degrees, that is, the power can be continuously output to let the bicycle travel.

The above left crank 1 and right crank 2 start from 270 to 0 degrees each. The 180-degree force stroke at the end of 150-180 degrees, but between 270 and 30 degrees, because the lower leg is located at a relatively high position above the axis 4, it is almost impossible to apply force effectively. At this time, the bicycle is generally dependent on the advancement. The inertia moves forward until the pedal travels to approximately 30 degrees to effectively generate forward power for the bicycle. Therefore, in the literature on bicycle power research, the interval of 30 to 150 degrees is often referred to as the "force zone".

It should be specially stated that the “force zone” will be slightly different because of the user's height, leg length and seat height. If the ride is in a forward tilt position, the end point of the “force zone” can even Reached 180 degrees.

Although it is known in the literature that most of the interval of 30 to 150 degrees is referred to as the "forced zone", it can be found in the course of further research on the actual riding that when the left crank 1 is at the beginning of the so-called "forced zone", At the 30 degree position, the user's left calf is still in a higher position (see the first figure). At this time, the knee joint between the lower leg and the thigh is more curved, which will cause the stress of the leg to be concentrated on the knee joint. The tibia is not only difficult to apply, but also easy to cause greater damage to the knee joint; this difficult situation is especially noticeable in the bicycle uphill stroke until the left crank 1 travels forward to reach about 45 degrees to 90 degrees. When the degree is between, the user begins to feel more relaxed, and the load on the knee joint begins to decrease.

The easier stroke of the above force can be maintained at approximately 90 degrees until the left crank 1 reaches 135 to 180 degrees. In other words, if the kinetic energy can be stored at the starting point of the stroke where the crank structure is easier to apply, that is, between 45 and 90 degrees, and after 90 degrees of deflection, after reaching 135 to 180 degrees, the kinetic energy is released to assist the force application, which will enable It is easier and less laborious to ride the bicycle, and it can effectively reduce the damage to the knee joint when riding a bicycle.

In order to solve the problem that during the bicycle riding process, the partial stroke is difficult to apply, and the partial stroke is relatively easy to apply, in the related prior art, US 3,259,398 designs the front gear of the bicycle as a "non-circular gear", and utilizes the non-circle. The long and short axles of the gear replace the force arm of the crank structure and solve this problem by changing the arm. However, in this method, when the user rides the bicycle, the pedaling speed will also be slowed down, which will destroy the speed of the circular motion of the legs. Sex, not comfortable when riding.

US 5,188,003 provides a cam on the axle of the bicycle crank structure and drives a shaft to compress or release the spring. US 6,092,821 is similarly different. It is provided with an additional set of cranks on the axis of the bicycle crank structure, and the second set of cranks is used to drive a shaft to compress or release the spring.

The above two prior art techniques of US 5,188,003 and US 6,092,821 are such that the user continuously compresses and releases the spring during the ride, thereby storing energy, although the user does not have the problem of being swift and slow during the pedaling process. However, it does not take into account that when a user rides a bicycle, depending on the purpose of the ride, there is no need to store kinetic energy at some time, and some particularly laborious strokes require storage and release of kinetic energy.

For example, when continuously climbing an uphill section or driving at a high speed for racing, when the pedal is at a higher position and the user is more difficult and difficult to step on, if additional kinetic energy can be obtained to assist the force, the continuous uphill section will be easier. It saves effort and reduces the burden on the knee joint. In contrast, if the user rides the bicycle only for the purpose of relaxing leisurely, no energy storage is required.

Therefore, in addition to how to reasonably store kinetic energy, designing a set of clutches capable of releasing the kinetic energy mechanism is also an extremely important design in the development process, and is also an insurmountable problem of the above prior art.

An object of the present invention is to provide a bicycle energy storage and labor saving device, which is linked with a crank structure of a bicycle, can store kinetic energy at a starting point of a relatively easy stroke, and starts to release kinetic energy to assist the force when the force is relatively difficult. It is easier and less labor-saving for the user to ride the bicycle, which not only can effectively reduce the damage to the knee joint when riding the bicycle, but also allows the user to select whether or not to store energy when riding the bicycle. For ease of use and practical purposes.

To achieve the above object, the bicycle energy storage and labor saving device comprises: a cam assembly rotatable in conjunction with an axis of the bicycle crank structure, a spring lifting assembly abutting against the cam assembly, and a clutch, the crank structure comprising Two pedals arranged in a 180 degree, characterized in that: the cam assembly comprises a substantially elliptical shape having two lifts and two descending cams which are alternately arranged, the cam being connected to the shaft via a bearing shaft The elastic lifting assembly comprises a lifting plate with an active surface abutting against the cam and capable of reciprocating lifting and lowering, and a spring disposed in the hollow tube of the bicycle, wherein one end of the spring is a free end to receive the lifting The top of the plate abuts and the other end is a fixed end position; when the cam starts to enter the lift, the lifting plate is pushed up while compressing the spring to store the elastic force, and after the cam is deflected by 90 degrees, the lowering is performed, so that the cam The spring begins to release the elastic force to push against the lifting plate and then push back to the cam, thereby assisting the crank structure to output kinetic energy; the clutch includes a rotating member and an operating member, the rotating member is slidably disposed on the shaft and synchronized with the shaft Rotating, and the side of the rotating member is engaged with the locking portion of the cam to drive the cam to rotate synchronously, and the operating member can drive the rotating member to slide, thereby releasing the clamping with the rotating member and the cam The engagement state between the cam axis and is not linked.

In implementation, the clutch further includes a small spring that abuts the rotating member away from the cam catching portion, and a pressing rod, the operating member includes a handle for the user to operate, and a connection between the pull handle and the pressing rod After the user handles the handle, the user can drive the pressure rod to move against the rotating member through the pulling rope, so that the rotating member and the holding portion are engaged with each other, or the driving rod is displaced by the pulling rope to move away from the rotating member, so that The small spring abuts against the rotating member away from the grip portion of the cam, thereby releasing the engagement state between the rotating member and the cam.

The present invention further provides a bicycle energy storage and labor saving device, comprising: a cam assembly rotatable in conjunction with an axis of the bicycle crank structure; a spring lifting assembly abutting against the cam assembly; and a clutch, the bicycle crank structure comprising two a pedal arranged in a 180 degree, characterized in that: the cam assembly comprises a substantially elliptical cam having two lifts and two descending strokes in sequence; the elastic lifting assembly includes an active surface against the cam and can a lifting plate for reciprocating lifting displacement, and a spring disposed in the hollow tube of the bicycle, wherein the lifting plate is further provided with a limiting portion capable of synchronous lifting, wherein one end of the spring is a free end to receive the top of the lifting plate, and One end is a fixed position limit end; when the cam starts to enter the lift, the lift plate is pushed up while compressing the spring to store the elastic force, and after the cam is deflected by 90 degrees, the lower limit is entered, so that the spring starts to release the elastic force push The lifting plate is pushed back to the cam to assist the crank structure to output kinetic energy; the clutch includes a blocking piece and an operating member, and the blocking piece is disposed on the side of the limiting portion and is maintained in a state of not moving up and down by the limiting portion. The operating member can drive the displacement of the blocking piece, so that the limiting portion rises and receives the interference of the blocking piece and cannot move downward, thereby causing the cam to form an idling state.

In practice, the limiting portion is a protrusion fixed on the lifting plate, and the clutch further comprises a clutch spring for holding the blocking piece away from the limiting portion, the operating member comprising a handle for the user to operate, And a pull cord connected between the handle and the baffle, after the user operates the handle, the displacement of the baffle can be driven against the limit portion by the pull cord, so that the limit portion cannot be moved downward after being raised.

The present invention further provides a bicycle energy storage and labor saving device, comprising: a cam assembly rotatable in conjunction with an axis of a bicycle crank structure, a spring lifting assembly abutting against the cam assembly, and a clutch, the crank structure comprising two The 180-degree arranged pedal is characterized in that: the cam assembly comprises a substantially elliptical shape having two lifts and two descending cams in sequence; the elastic lifting assembly comprises an active surface abutting against the cam and reciprocating a lifting and lowering lifting plate, and a spring disposed in the hollow tube of the bicycle, wherein one end of the spring is a free end receiving the top of the lifting plate, and the other end is a limiting end; when the cam starts to enter the lift, the spring is pushed The lifting plate rises while compressing the spring to store the elastic force, and after the cam is deflected by 90 degrees, the falling stroke is entered, so that the spring starts to release the elastic force to push against the lifting plate and then push back to the cam, thereby assisting the crank structure to output kinetic energy; The clutch comprises a blocking member fixed on the bicycle and capable of receiving the spring end of the limiting end, and an operating member capable of driving the blocking member to actuate, the operating member driving the blocking member to actuate the blocking member to release the limiting end The top is offset so that the spring is displaced as a whole without being compressed.

In implementation, the blocking member comprises a positioning frame fixed at the position of the spring limiting end, and a set of stopping protrusions disposed in the positioning frame to receive the spring end of the limiting end, the operating member passing through a pulling rope The stop stud is controlled to displace the spring against the spring.

With the above configuration, when one of the pedals of the crank structure is relatively easy to apply by the user, the compression of the spring by the cam assembly can easily store the power; when the cam is deflected by 90 degrees, the user enters the descending position, at this time, the user The force applied to the pedal is relatively difficult. Therefore, the spring release elastic force can assist the pedal crank to output kinetic energy, and in addition to assisting the bicycle to travel, the load on the knee joint of the user can be effectively reduced.

When the spring releases the spring force to the cam and then deflects 90 degrees, it begins to enter the lift. At this time, the other pedal is connected for the user to easily apply force, and at the same time, the compression spring is started to store energy until the cam is deflected by 90 degrees and then enters the down range. The spring begins to release the spring force. Thus, under the alternate action of the two pedals of the crank structure, the user's left and right feet are alternately stepped on to make the cam rotate one turn, and the force is relieved, and the load on the knee joints can be effectively reduced, and the bicycle is avoided. Injury to the knee joint. In addition, the clutch allows the user to select whether or not to store energy when riding the bicycle, so as to achieve ease of use and practical use, overcoming the disadvantages of the prior art.

Embodiments of the various elements are further described below: in practice, when the two pedals of the bicycle crank structure are deflected from 0 degrees directly above the axis to between 45 and 90 degrees, the cam begins to enter the lift.

In implementation, the two ends of the long axis of the cam are each provided with a roller for reducing the friction between the elastic lifting assembly and the elastic lifting assembly.

In implementation, the bicycle energy storage device further includes a protective casing having two pieces disposed on the outer side of the two sides of the cam and the lifting plate The plates are respectively disposed at the bottoms of the two side plates to fix the shaft holes around the periphery of the shaft, and respectively extend over the upper side and the front side of the two side plates to respectively pass through and fix the hollow seat tube and the hollow support tube of the bicycle.

In implementation, the outer sides of the lifting plate are respectively provided with guiding rollers that are in contact with the two side plates.

Compared with the prior art, the cam assembly and the elastic lifting assembly of the present invention can compress the energy storage when the user applies the force relatively easily, and output the kinetic energy when the user applies the force relatively, thereby allowing the bicycle to ride. The force is more uniform and relaxed, and the load on the knee joint of the user is effectively reduced. In addition, the elastic lifting assembly can be actuated or not actuated by the clutching cooperation, so that the user can select whether or not to store energy according to the road condition when riding the bicycle, so as to achieve convenient use and practical purposes.

In the following, according to the technical means of the present invention, embodiments suitable for the present invention are listed, and the following description is in conjunction with the drawings:

100‧‧‧ crank structure

101‧‧‧First pedal

102‧‧‧Second pedal

110‧‧‧Axis

120‧‧‧ bearing

200‧‧‧ hollow pipe fittings

10‧‧‧Cam assembly

11‧‧‧ cam

111‧‧‧Keeping Department

12‧‧‧Roller

20‧‧‧Elastic lifting assembly

21‧‧‧ lifting plate

211‧‧‧Action surface

212‧‧‧Put

213‧‧‧Limited

22‧‧‧ Spring

221‧‧‧Free end

222‧‧‧limit end

23‧‧‧Guide Roller

30‧‧‧Clutch

31‧‧‧Rotating parts

311‧‧‧Small spring

312‧‧‧Press

32‧‧‧Operating parts

321‧‧‧ handle

322‧‧‧Drawstring

33‧‧‧Block

34‧‧‧Clutch spring

35‧‧‧blocking parts

351‧‧‧ positioning frame

352‧‧‧stop stud

40‧‧‧protective shell

41‧‧‧ side panels

42‧‧‧Axis hole

43‧‧‧Perforation

First picture: Schematic diagram of the user riding a bicycle.

The second picture: the relationship between the rotation angle of the traditional bicycle crank structure and the kinetic energy generated.

Third figure: Schematic diagram of the position of the present invention.

Fourth Figure: Schematic diagram of the structure of the present invention in which the cam assembly begins to enter the lift.

Fig. 5 is a schematic view showing the cam assembly in the lift state and compressing the spring in the present invention.

Figure 6 is a schematic view of the cam assembly of the present invention beginning to enter a descending stroke.

Figure 7 is a schematic view showing the release of kinetic energy of the cam assembly in the descending state of the present invention.

Figure 8: Schematic diagram of spring release kinetic energy of the cam assembly in the present invention during the downshift (2).

Ninth view: A schematic view of the cam assembly of the present invention starting to enter the lift again.

Figure 11 is a schematic view showing the structure of the first embodiment of the clutch of the present invention.

Figure 11: Schematic diagram of the action of the clutch in the tenth figure.

Twelfth Figure: A perspective view of a second embodiment of the clutch and the elastic lifting assembly.

Thirteenth figure: Schematic diagram of the structure of the twelfth figure.

Figure 14 is a schematic view showing the operation of the second embodiment of the clutch of the present invention (1).

Fifteenth Diagram: Schematic diagram of the operation of the second embodiment of the clutch of the present invention (2).

Figure 16: Schematic diagram of the cam idling after the clutch is actuated in the present invention.

Figure 17 is a schematic view showing the structure of a third embodiment of the clutch of the present invention.

Figure 18: Schematic diagram of the action when the clutch is not activated in the seventeenth figure.

Figure 19: Figure 17 is a schematic diagram of the action of the elastic lifting assembly when the clutch is started.

Fig. 20 is a structural schematic view showing another arrangement position of the present invention.

As shown in the third and fourth figures, the bicycle energy storage device includes a cam assembly 10 that can rotate in conjunction with the shaft 110 of the bicycle crank structure 100, a spring lifting assembly 20 that abuts against the cam assembly 10, and a The clutch 30, wherein: the crank structure 100 of the bicycle comprises two left and right cranks arranged in a 180 degree, and the force receiving ends of the left and right cranks are a first pedal 101 and a second pedal 102, respectively, for the left and right casters to rotate Stepping on the urging force, the following illustration takes the first pedal 101 as a half turn.

The cam assembly 10 includes a cam 11 which is substantially elliptical and has a roller 12 at each end of its long axis. The center of the cam 11 is disposed coaxially with the front gear shaft 110, and rotates in conjunction with the crank structure 100, so that the stroke of the one rotation of the cam 11 has two lifts and two descending steps in sequence, and The elliptical cam 11 and the two rollers 12 are in point contact with the elastic lifting assembly 20 during the rotational stroke, wherein the two rollers 12 are more rotatable to reduce friction with the elastic lifting assembly 20.

The elastic lifting assembly 20 includes a lifting plate 21 that abuts against the cam 11 and is capable of moving up and down, and a spring 22 disposed in the hollow body member 200 of the vehicle body. In implementation, the hollow tubular member 200 may be a hollow support tube between the bicycle frame faucet shaft and the front gear shaft, or a hollow seat tube between the bicycle seat cushion and the shaft center.

The lifting plate 21 has an active surface 211 that abuts against the cam 11 . And a push rod 212 that abuts against the spring 22, so that the spring 22 can receive the force of displacement of the push rod 212 of the lift plate 21 to be repeatedly compressed in the hollow tubular member 200.

One end of the spring 22 is a free end 221 abutted by the push rod 212, and the other end is abutting against the limit end 222 of the clutch 30. The limiting end 222 of the spring 22 is fixed on the hollow tubular member 200, or can be activated or not actuated by the clutch 30, so that the user can choose whether to store energy when riding the bicycle (the clutch structure is described later). ).

As shown in the fourth figure, when the first pedal 101 is deflected from a position of 0 degrees above the front gear shaft 110 to any position between 45 and 90 degrees (in the figure, 60 degrees is taken as an example), the cam The long axis of 11 is approximately parallel to the active surface 211 of the lift plate 21, causing the continuously rotating cam 11 to begin to enter the lift.

As shown in the fifth figure, the cam 11 entering the lift can push the lifting plate 21 to rise and compress the spring 22, so that the spring 22 stores the elastic force; at this time, the user exerts a force to step on the first pedal 101, and the knee joint burden is relatively easy. Small, so the compression spring 22 can be loosely compared to store power.

As shown in the sixth figure, when the cam 11 is deflected by 90 degrees, that is, when the first pedal 101 reaches a position between 135 and 180 degrees (in the figure, 150 degrees is taken as an example), the second pedal 102 is synchronously rotated to 215~. At 0 degrees, at this time, the positions of the first pedal 101 and the second pedal 102 basically make it difficult for the user to step on, and it is difficult or even impossible to apply force. At this time, the cam 11 is rotated by 90 degrees in synchronization, and the long-axis displacement thereof reaches a position approximately perpendicular to the acting surface 211 of the lift plate 21 to start the descending stroke.

As shown in the seventh and eighth figures, when the cam 11 enters the lowering stroke, since the spring 22 is currently in a compressed state, the reaction force of the free end 221 abuts against the lifting plate 21, so when the cam 11 enters the descending path, The spring 22 starts to release the elastic force, and pushes back to the lifting plate 21, and then pushes the cam 11 to push the crank structure to output kinetic energy, so that the user can step on the difficult condition to obtain the elastic force of the spring 22 to assist, not only can the force be applied. It is easy and can effectively reduce the load on the knees of the legs.

As shown in the ninth figure, the stroke of the spring 22 for releasing the elastic force is 90 degrees, that is, when the first pedal 101 is deflected from a position of 135 to 180 degrees to a position of 225 to 270 degrees, the second pedal 102 is deflected to 45 to 90. Degree of location. At this time, the cam 11 returns to a position where the long axis is approximately parallel to the acting surface 211 of the lift plate 21, and the lift is started again.

As described above, at this time, the second pedal 102 starts to take over the first pedal 101 and accepts the user to apply force to step on the pedal; when the second pedal 102 is stepped on, as described above, the user applies the force relatively easily, and the knee joint burden is relatively high. Small, so the spring 22 can be easily compressed again to store power. Thus, under the alternate action of the first and second pedals 101, 102 of the crank structure 100, the user can alternately press the left and right feet to make the cam 11 rotate one turn, and the force is relatively uniform, so that the process of riding the bicycle is relatively easy. To avoid injury to the knee joint.

The aforementioned clutch 30 is intended to allow the user to select whether or not energy storage is required. There are three implementations: as shown in the tenth and eleventh figures, the first embodiment of the clutch 30 is that the cam 11 is axially coupled to the shaft 110 via a bearing 120, and the cam 11 is disposed on the side of the shaft. There is a holding portion 111; the clutch 30 includes a rotating member 31 and an operating member 32. The rotating member 31 is slidably disposed on the shaft 110 to rotate synchronously with the shaft 110, and the rotating member 31 is side-carded. The cam portion 11 is rotated in synchronization with the engaging portion 111 of the cam 11, and the operating member 32 can drive the rotating member 31 to slide, thereby releasing the engagement state between the rotating member 31 and the holding portion 111 of the cam 11.

When the rotating member 31 is released from the engaged state with the engaging portion 111 of the cam 11, since the cam 11 is axially coupled to the shaft 110 through a bearing 120, and the reaction force of the spring 22 in the elastic lifting assembly 20 is made The cam 11 is pressed so that the bearing 120 is idling when the shaft 110 is rotated, so that the cam 11 and the shaft center 110 are not interlocked, and the entire group of energy storage devices will not operate again during the riding of the bicycle. .

In the figure, the clutch 30 further includes a small spring 311 that abuts against the rotating member 31 away from the locking portion 111 of the cam 11 and a pressing rod 312. The operating member 32 includes a handle 321 for the user to operate, and a handle The pull cord 322 is connected between the handle 321 and the pressing rod 312. After the user operates the handle 321 , the user can drive the pressing rod 312 to move against the rotating member 31 through the pulling rope 322, so that the rotating member 31 and the cam 11 are stuck. The holding portions 111 are engaged with each other or the driving rod 312 is displaced by the pulling rope 322. The rotating member 31 causes the small spring 311 to abut against the rotating member 31 away from the locking portion 111 of the cam 11, thereby releasing the engagement state between the rotating member 31 and the cam 11; in the figure, the pressing rod 312 is provided with a small roller at the end. The crucible can reduce the friction between the pressing rod 312 and the rotating member 31 when the rotating member 31 rotates.

The second embodiment of the clutch 30 is further provided with a limiting portion 213 which can be synchronously lifted and lowered on the lifting plate 21, and the limiting portion 213 is a bump in the figure. The clutch 30 is disposed on the side of the limiting portion 213, and includes a blocking piece 33, at least one clutch spring 34 for holding the blocking piece 33 away from the protrusion, and an operating member 32, and the operating member 32 includes a user for the user. The handle 321 is operated, and a pull cord 322 is connected between the handle 321 and the flap 33. Under the action of the clutch spring 34, the blocking piece 33 is held at a position away from the interference portion 213, and the limiting portion 213 can be freely moved up and down.

As shown in the fourteenth and fifteenth figures, when the handle 321 is displaced by the pull cord 322 to drive the flap 33, the flap 33 can be moved against the limiting portion 213, and the limiting portion 213 is lifted and lowered. When the plate 21 is raised to the apex, the flap 33 is further displaced to the bottom of the limiting portion 213 by the action of the clutch spring 34 and abuts against the limiting portion 213.

As shown in the sixteenth embodiment, when the stopper portion 213 is abutted against the stopper piece 33 and cannot be lowered, the compressed spring 22 cannot release the elastic force to push back the lift plate 21 due to the blocking of the stopper piece 33, so that the lift plate 21 is lifted. Keeping at the position rising to the apex, the continuously rotating cam 11 forms an idling state, so that the user does not interlock with the spring 22 during the stroke of the crank structure.

As shown in the seventeenth embodiment, the third embodiment of the clutch 30 includes a blocking member 35 that can be fixed to the hollow tubular member 200 to receive the end of the retaining end 222 of the spring 22, and an actuatable blocking member 35. The actuating member 32, when the operating member 32 drives the blocking member 35 to actuate, the blocking member 35 can be disengaged from the limiting end 222 of the spring 22, so that the limiting end 222 forms a displaceable state, and when the lifting plate 21 is lifted When the cam 11 is pushed up and down, the spring 22 is pushed and displaced as a whole at the same time, so that it is not compressed and cannot be stored.

In the figure, the blocking member 35 includes a positioning frame 351 fixed at the position of the limiting end 222 of the spring 22, and a set is disposed in the positioning frame 351 to receive the spring 22 The stopping rod 352 abuts against the limiting end 222, and the operating member 32 controls the displacement of the stopping protrusion 352 by a pulling handle 321 and the pulling rope 322 to release the topping state of the limiting end 222 of the spring 22.

As shown in FIG. 18, in the normal state, the stop stud 352 is held at a position that receives the limit end 222 against the limit, so that the spring 22 can be compressed from the free end 221 toward the limit end 222. Energy storage.

As shown in FIG. 19, when the user controls the displacement of the stopper protrusion 352 by the operating member 32, the stopper protrusion 352 can be released from the abutting end of the limiting end 222, and the spring 22 is pushed by the lifting plate 21. At this time, since the limiting end 222 is not restricted by the stopper stud 352, the entire spring 22 can be freely moved and displaced as the lifting plate 21 is freely moved, so that the user can select whether or not energy storage is required as needed.

As shown in the twentieth diagram, the setting angle of the elastic lifting assembly 20 is not limited to the inclined state, and the elastic lifting assembly 20 may also be disposed at an angle perpendicular to the ground (ie, disposed under the seat cushion and the front gear shaft). Between the hollow seat tube). The operating principles of the cam assembly 10, the elastic lifting assembly 20, and the clutch 30 of this embodiment are the same as those described above, and are not described herein.

In addition, as shown in the twelfth embodiment, the present invention further includes a protective case 40 having two side plates 41 disposed on the outer sides of the cam 11 and the lifting plate 21, respectively disposed on the two side plates. The bottom portion of the 41 is a shaft hole 42 fixed to the periphery of the shaft core 110, and a through hole 43 which is respectively disposed above and on the front side of the two side plates 41 to respectively pass and fix the hollow tubular member 200 of the bicycle.

In addition, the outer side of the two sides of the lifting plate 21 are respectively provided with guide rollers 23 which are in contact with the two side plates 41. When the lifting plate 21 is lifted up and down by the cam 11, the guiding rollers 23 are passed through the inner side of the two side plates 41. The contact rolling ensures that the lifting plate 21 moves linearly up and down without being skewed.

The above description of the embodiments and the drawings are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and should be similar or identical to the structures, devices, features, etc. of the present invention. It is within the scope of the invention and the scope of the patent application.

Claims (6)

A bicycle energy storage and labor saving device comprises: a cam assembly rotatable in conjunction with an axis of a bicycle crank structure; a spring lifting assembly abutting against the cam assembly; and a clutch comprising two 180 degree arrays The pedal assembly is characterized in that: the cam assembly comprises a substantially elliptical shape having two lifts and two descending cams in sequence; the elastic lifting assembly comprises an action surface abutting against the cam and capable of reciprocating lifting movement a plate, and a spring disposed in the hollow tube of the bicycle, wherein one end of the spring is a free end receiving the top of the lifting plate, and the other end is a limiting end; when the cam starts to enter the lift, the lifting plate is pushed up while The spring is compressed to store the elastic force, and after the cam is deflected by 90 degrees, the lowering stroke is entered, so that the spring starts to release the elastic force to push against the lifting plate and then push back to the cam, thereby assisting the crank structure to output kinetic energy; the clutch includes a fixed on the bicycle. a blocking member capable of abutting against a limit end of the spring, and an operating member capable of driving the blocking member to actuate When the actuating member, can contact the blocking member releases the top end of the stopper, so that the overall displacement of the spring is pushed without being compressed. The bicycle energy-saving and labor-saving device according to claim 1, wherein the blocking member comprises a positioning frame fixed at a position of the spring limiting end, and a set of a circumference disposed in the positioning frame to receive the spring end of the limiting end. The retaining stud, the operating member controls the displacement of the stop stud by a pull cord to release the topping state of the spring. The bicycle energy storage labor saving device according to claim 1 or 2, wherein the two pedals of the bicycle crank structure are deflected from 0 degrees directly above the shaft center to between 45 and 90 degrees, the cam starts to enter the lift. The bicycle energy storage labor saving device according to claim 1 or 2, wherein each of the long shafts of the cam is provided with a roller for reducing friction between the elastic lifting assembly and the elastic lifting assembly. The bicycle energy-saving device according to claim 1 or 2, further comprising a protective casing having two side plates disposed on the outer sides of the cam and the lifting plate, respectively disposed at the bottoms of the two side plates for fixing A shaft hole around the shaft center, and a through hole which is respectively disposed on the upper side and the front side of the two side plates for respectively passing and fixing the two hollow tubes of the bicycle. The bicycle energy storage and labor saving device according to claim 5, wherein the outer side of the lifting plate is respectively provided with guiding rollers that are in contact with the two side plates.