CN210555399U

CN210555399U - Power-saving bicycle

Info

Publication number: CN210555399U
Application number: CN201921201241.7U
Authority: CN
Inventors: 张新金
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-05-19
Anticipated expiration: 2029-07-26

Abstract

The utility model provides a labor-saving bicycle belongs to bicycle technical field. It has solved the current bicycle and has had the poor problem of structural stability. The labor-saving bicycle comprises a frame and a driving wheel, wherein crank discs are connected to two sides of the frame respectively, pedals are connected to the side portions of the crank discs, the labor-saving bicycle further comprises a driving wheel and two long rod-shaped transmission rods, the transmission wheels are rotatably fixed to the frame, the two long rod-shaped transmission rods are arranged on two sides of the frame respectively, one ends of the two transmission rods are connected with the driving wheel, the other ends of the two transmission rods are movably connected to the eccentric positions of the two crank discs respectively, the two transmission rods can swing around the driving wheel in a reciprocating mode alternately when the crank discs rotate in the circumferential direction, a one-way transmission structure is arranged between the driving wheel and the two transmission rods, and the driving wheel can be driven to rotate through. This laborsaving bicycle has the advantage that transmission structure stability is good.

Description

Power-saving bicycle

Technical Field

The utility model belongs to the technical field of the bicycle, a laborsaving bicycle is related to.

Background

With the increasing automobile holding capacity, the pollution of the tail gas discharged by the automobile to the environment is increasingly serious. Meanwhile, parking spaces are increasingly tense, and the increasing demands of automobiles are difficult to meet. The bicycle is continuously concerned by people due to economy, convenience, flexibility, no pollution and free parking, and the bicycle can be an indispensable tool for riding instead of walk in daily life of people. However, the current bicycle drives the wheels forwards only by matching the traditional pedal with a simple chain wheel and chain structure, and once the bicycle meets the road conditions such as a steep slope and the like which need large driving force, great inconvenience is caused to people going out.

Therefore, a double-crank connecting rod reciprocating bicycle is designed and Chinese patent is applied (the application number is 201410733747.8; the publication number is CN104527899B), the double-crank connecting rod reciprocating bicycle comprises a double-crank connecting rod mechanism, and the double-crank connecting rod mechanism comprises a fixed chain wheel, a chain wheel shaft, a chain wheel seat, an eccentric wheel shaft, a frame connecting body, a central shaft, a connecting rod and a lever. During the use, the user can trample the one end of lever, through lever, connecting rod, eccentric wheel, sprocket, chain and fixed sprocket's transmission in proper order, gives the wheel of bicycle with power transmission to the drive bicycle advances, compares in traditional bicycle, and this two crank connecting rod reciprocating bicycle utilizes the laborsaving structure of lever, greatly reduced the demand of bicycle drive power, has improved great facility for the trip of bicycle.

Because of the factor of considering laborsaving lever, the length that the tip that the lever can trample one end will be greater than the length of the lever other end to pin joint. However, when the double-crank connecting rod reciprocating bicycle is used, the end part of the lever is needed to be trampled up and down along the vertical direction by the two feet of a user, the user applies instant acting force to the end part of the longer end of the lever for a long time, the lever is extremely easy to be bent or even broken, the end of the lever, which is used for being trampled, is not fixed, after the double-crank connecting rod reciprocating bicycle is used for a long time, a hinge point is loosened, so that the unconnected end of the lever can swing freely in the horizontal direction, and the problem of poor structural stability exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a laborsaving bicycle, the technical problem that solve how to provide a laborsaving bicycle that transmission structure stability is good.

The purpose of the utility model can be realized by the following technical proposal:

a labor-saving bicycle comprises a frame and a driving wheel, wherein two sides of the frame are respectively connected with a crank disk which is vertically arranged, the side part of the crank disk is connected with pedals capable of driving the crank disk to rotate circumferentially, it is characterized in that the labor-saving bicycle also comprises a driving wheel which is rotationally fixed on the frame and two long rod-shaped transmission rods which are respectively arranged on the two sides of the frame, one end of each transmission rod is connected with the driving wheel, the other end of each transmission rod is respectively movably connected on the eccentric position of the corresponding crank disk, and the two transmission rods can alternately swing back and forth around the transmission wheel when the crank disk rotates in the circumferential direction, one-way transmission structures are arranged between the transmission wheels and the two transmission rods, and the rotation of the transmission wheels can drive the driving wheels to rotate through chains or belts.

When the labor-saving bicycle is used, a user can step on a pedal to drive a crank disc to rotate in the circumferential direction, the crank disc drives a transmission rod eccentrically connected to the crank disc to swing up and down in a reciprocating mode, a one-way transmission structure is arranged between the transmission wheel and the transmission rod, the transmission wheel can be driven to rotate only when the transmission rod swings in the forward direction (the transmission rod swings downwards to be regarded as swinging in the forward direction), when the transmission rod swings in the reverse direction, the one-way transmission structure is disengaged, power transmission is not conducted, the two transmission rods swing alternately, when one transmission rod swings in the reverse direction, the other transmission rod swings in the forward direction, the transmission wheel can continuously obtain power transmission, and further, the driving force of the user is transmitted to a driving wheel through a chain or a belt to conduct forward. Here, through the transmission of the long rod-shaped transmission rod, one end of the transmission rod, which is used for applying acting force by a user, is far enough away from the swing center of the transmission rod, so that the moment arm is increased, the requirement on driving force is reduced, and the whole treading process is more labor-saving.

In the driving process, two ends of a transmission rod for transmitting power are respectively connected with the crank disc and the transmission wheel, so that the connection of the two ends of the transmission rod is realized, the condition that one end of the transmission rod swings freely without being fixed is avoided, and the stability of a transmission structure is ensured. Meanwhile, the driving force of a user is transmitted from the pedal to the crank disk connected to the frame in a rotating mode, so that the radial acting force in the instant acting force applied by the user is directly transmitted to the firm frame, only the driving force in circumferential motion is transmitted to the disc-shaped crank disk, and then the driving force is indirectly transmitted to the transmission rod, the situation that the transmission rod is bent or even broken due to the instant acting force is avoided, and the stability of the structure is further improved.

In the labor-saving bicycle, a long strip-shaped through hole is formed in the side portion of one end of the transmission rod in a penetrating mode, a protruding transmission shaft is arranged on the side portion of the crank disc in a penetrating mode, and the transmission shaft penetrates through the through hole and can move back and forth along the length direction of the through hole. The circular motion of the treading pedal of the user is converted into the up-and-down swing of the transmission rod through the sliding fit of the strip-shaped through hole and the transmission shaft, the motion stroke of the transmission rod is simplified, the interference of the transmission rod with other structures due to large-amplitude motion is avoided, and the stability of the transmission structure is ensured.

In the labor-saving bicycle, the two crank disks are coaxially arranged on two sides of the frame, the two crank disks are respectively provided with the transmission shaft, the two transmission shafts are symmetrically distributed on the two crank disks by taking the axis of the crank disks as a center, and one ends of the two transmission rods are sleeved on the outer sides of the two transmission shafts in a one-to-one correspondence manner. Two transmission shafts are symmetrically distributed, and the two transmission rods can swing up and down in a reciprocating manner along with the circumferential rotation of the crank disk by matching with the strip-shaped through holes in the transmission rods, so that the structure distribution of two sides of the vehicle is uniform, and the stability of the structure is ensured.

In the labor-saving bicycle, the crank disc comprises a first split body and a second split body which are both disc-shaped, the first split body and the second split body are coaxially arranged, the transmission shaft is perpendicular to the first split body and is fixedly connected with the first split body and the second split body respectively, and one end of the transmission rod extends into the space between the first split body and the second split body and is sleeved on the outer side of the transmission shaft. The crankshaft plate is divided into a first split body and a second split body which are coaxially arranged, the transmission rod is arranged between the first split body and the second split body, the structure is compact, the transmission rod can be axially limited and protected, and the stability of the structure is further improved.

In the above labor-saving bicycle, the driving wheel is disc-shaped and is disposed on the upper portion of the driving wheel. The transmission wheel is arranged on the upper part of the driving wheel, so that the connection of a one-way transmission structure and the full utilization of the space of the bicycle are conveniently realized, and the interference of a long rod-shaped transmission rod structure and other structures is avoided.

In the labor-saving bicycle, the labor-saving bicycle further comprises a speed change gear set, wherein the input end of the speed change gear set is connected with the transmission wheel, and the output end of the speed change gear set can drive the driving wheel to rotate through the chain or the belt. Because the swing amplitude of the transmission rod is relatively small, the transmission ratio can be further improved through the arrangement of the speed change gear set, and the effect of saving more labor is achieved. Of course, the position of the speed change gear set can be properly adjusted according to the requirement, and the transmission wheel can also comprise common transmission parts such as transmission gears and the like.

In the labor-saving bicycle, the one-way transmission structure comprises a ratchet wheel and a pawl which are meshed in one way, the ratchet wheel is in transmission connection with the driving wheel, and the pawl is correspondingly connected to the transmission rod.

In the above labor-saving bicycle, the one-way transmission structure includes a one-way clutch.

Compared with the prior art, the labor-saving bicycle has the following advantages:

1. according to the lever principle, the transmission rod realizes power transmission, the requirement on the driving force of a user is reduced, and the bicycle is more labor-saving to ride and can be started more quickly.

2. Utilize the circumferential direction of bent axle dish to realize power transmission, accord with user's custom of riding better, reduced the pressure that the user ridden in the change ground.

3. The two ends of the transmission rod are connected, free swing of the transmission rod is avoided, and stability of the transmission structure is guaranteed.

4. The indirect power transmission is carried out by the crank disk which is rotationally connected to the frame, the condition that instant acting force applied by a user directly acts on the transmission rod is avoided, the service life of the transmission rod is ensured, and the stability of the transmission structure is further ensured.

Drawings

Fig. 1 is a schematic view of the transmission structure of the labor-saving bicycle.

Fig. 2 is a schematic view of another perspective of the transmission structure of the labor-saving bicycle.

Fig. 3 is a schematic structural view of the joint of the transmission rod and the transmission shaft in the labor-saving bicycle.

Fig. 4 is a schematic view of a one-way transmission configuration.

In the figure, 1, a driving wheel; 2. a frame; 3. a crank disk; 3a, splitting; 3b, splitting; 4. a pedal; 5. a transmission rod; 5a, a through hole; 6. a drive shaft; 7. a driving wheel; 8. a chain; 9. and a one-way transmission structure.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the power saving bicycle includes a frame 2, a front wheel connected to a front portion of the frame 2, and a rear wheel connected to a rear portion of the frame 2, wherein the rear wheel is generally used as a driving wheel 1. The frame 2 between the front wheel and the rear wheel is connected with a vertically arranged disk-shaped crank disk 3, and the outer side of the crank disk 3 is connected with a pedal 4 which can be pedaled by a user and can drive the crank disk 3 to rotate circumferentially.

The labor-saving bicycle further comprises a long rod-shaped transmission rod 5, a protruding transmission shaft 6 is further arranged at the eccentric position of the side portion of the crank disk 3, one end of the transmission rod 5 is sleeved on the transmission shaft 6 and can rotate circumferentially around the transmission shaft 6, and the other end of the transmission rod 5 is in transmission connection with the driving wheel 1.

In this embodiment, the number of the crank discs 3 is two, and the two crank discs are coaxially and rotatably connected to two sides of the frame 2, the two crank discs 3 are respectively provided with a transmission shaft 6, the two transmission shafts 6 are symmetrically distributed on the two crank discs 3 with the axis of the crank discs 3 as the center, the number of the transmission rods 5 is two, and the two transmission rods are respectively arranged on two sides of the frame 2, one end of each of the two transmission rods 5 is sleeved outside the two transmission shafts 6 in a one-to-one correspondence manner, and a one-way transmission structure 9 is arranged between the other end of each of the two transmission rods 5 and the driving wheel 1.

The two crank discs 3 are identical in structure and respectively comprise a first discoid split body 3a and a second discoid split body 3b, the first split body 3a and the second split body 3b are coaxially arranged, the transmission shaft 6 is perpendicular to the first split body 3a, the inner end of the transmission shaft 6 is fixedly connected with the side part of the second split body 3b, and the outer end of the transmission shaft 6 penetrates through the first split body 3a and is fixedly connected with the pedal 4. One end of the transmission rod 5 extends into the space between the first split body 3a and the second split body 3b and is sleeved on the outer side of the corresponding transmission shaft 6.

In the embodiment, the side portions of one ends of the two transmission rods 5 are both provided with a strip-shaped through hole 5a in a penetrating manner, and the two transmission shafts 6 are correspondingly arranged in the through hole 5a in a penetrating manner and can move back and forth along the length direction of the through hole 5 a.

The labor-saving bicycle further comprises a driving wheel 7 arranged on the upper portion of the driving wheel 1 and a rotating shaft penetrating through the center of the driving wheel 7, the driving wheel 7 is fixedly connected with the rotating shaft, and the rotating shaft penetrates through the frame 2 and can rotate around the axis of the rotating shaft. One end of each of the two transmission rods 5 is sleeved outside the two ends of the rotating shaft, and the one-way transmission structures 9 are arranged at the joints of the two transmission rods 5 and the two ends of the rotating shaft. The transmission wheel 7 is directly or indirectly in transmission connection with the driving wheel 1 through a chain 8 or a belt. Here, as shown in fig. 4, the one-way transmission structure 9 may include a ratchet wheel and a pawl engaged in one way, and a torsion spring connected to the pawl or a one-way clutch, both of which have similar structures and can be divided into two parts capable of locking or freely moving, one part is fixedly connected to the rotating shaft, the other part is fixedly connected to the transmission rod 5, when the transmission rod 5 rotates around the rotating shaft in the forward direction, the two parts of the one-way transmission structure 9 are locked, and the transmission rod 5 drives the rotating shaft to rotate synchronously to transmit power; when the transmission rod 5 rotates reversely around the rotating shaft, the two parts of the one-way transmission structure 9 are unlocked, and the transmission rod 5 rotates freely relative to the rotation without transmitting power. In addition, the transmission wheel 7 can be one, two or more, and can be used for speed change, such as a change gear, and can also be additionally connected with the input end of the change gear group, and the output end of the change gear group transmits power to the driving wheel 1 through a chain 8 or a belt; the driving wheel 7 can design the swing angle of the transmission rod 5 around the driving wheel 7 to be 10-45 degrees according to the actual structural requirement, and the transmission ratio between the driving wheel 7 and the driving wheel 1 can be adjusted to be 5-50 times according to the existing speed-changing bicycle. Here, the swing angle is 30 ° and the transmission ratio is 10 times as an example: when the drive wheel 7 need rotate 1 circle, need the 5 luffing motion of transfer line 12 times, bent axle disc 3 needs rotate 12 circles promptly, and drive wheel 1 can rotate 10 circles under 10 times's drive ratio effects, and the user tramples footboard 4 and drives bent axle disc 3 and can drive wheel 1 and rotate 1 circle every 1.2 circles, and it is comparatively laborsaving to ride, of course, according to the road conditions demand of difference, the number of turns of rotation between them can be adjusted in addition.

When the labor-saving bicycle is used, a user can tread the pedal 4 to drive the crank disc 3 to rotate in the circumferential direction, the circular motion of the user treading the pedal 4 is converted into the up-and-down swinging of the transmission rod 5 through the sliding fit of the strip-shaped through hole 5a on the transmission rod 5 and the transmission shafts 6, because the positions of the transmission shafts 6 on the two crank discs 3 on the two sides of the frame 2 are in central symmetry distribution, the transmission rods 5 sleeved on the two transmission shafts 6 can have opposite swinging directions in the rotating process of the crank discs 3, namely when the transmission rod 5 on one side swings downwards, the transmission rod 5 on the other side swings upwards, the one-way transmission structure 9 can only transmit the power of the transmission rod 5 swinging in the forward direction (the downward swinging can be taken as the forward swinging direction) to the rotating shaft, and the two transmission rods 5 swinging in the opposite directions can alternately drive the rotating shaft to rotate uninterruptedly along the same direction, the driving force of the user is transmitted to the driving wheel 1 through the transmission wheel 7 to drive the bicycle forwards.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A labor-saving bicycle comprises a frame (2) and a driving wheel (1), wherein two sides of the frame (2) are respectively connected with a vertically arranged crank disk (3), the side parts of the crank disks (3) are respectively connected with pedals (4) capable of driving the crank disks (3) to rotate in the circumferential direction, the labor-saving bicycle is characterized by further comprising a driving wheel (7) rotatably fixed on the frame (2) and two long rod-shaped transmission rods (5) respectively arranged on two sides of the frame (2), one ends of the two transmission rods (5) are respectively connected with the driving wheel (7), the other ends of the two transmission rods (5) are respectively movably connected on the eccentric positions of the two crank disks (3), and the two transmission rods (5) can alternatively swing back and forth around the driving wheel (7) when the crank disks (3) rotate in the circumferential direction, one-way transmission structures (9) are arranged between the transmission wheel (7) and the two transmission rods (5), and the rotation of the transmission wheel (7) can drive the driving wheel (1) to rotate through a chain (8) or a belt.

2. The labor-saving bicycle as claimed in claim 1, wherein a side of one end of the transmission rod (5) is provided with an elongated through hole (5a) therethrough, the side of the crank disk (3) is provided with a protruding transmission shaft (6), and the transmission shaft (6) is inserted into the through hole (5a) and can move back and forth along the length direction of the through hole (5 a).

3. The labor-saving bicycle as claimed in claim 2, wherein the two crank disks (3) are coaxially arranged on two sides of the frame (2), each crank disk (3) is provided with a transmission shaft (6), the two transmission shafts (6) are symmetrically distributed on the two crank disks (3) by taking the axis of the crank disk (3) as a center, and one ends of the two transmission rods (5) are sleeved outside the two transmission shafts (6) in a one-to-one correspondence manner.

4. The labor-saving bicycle according to claim 2 or 3, wherein the crank disk (3) comprises a first split body (3a) and a second split body (3b) which are both disc-shaped, the first split body (3a) and the second split body (3b) are coaxially arranged, the transmission shaft (6) is arranged perpendicular to the first split body (3a), the transmission shaft (6) is fixedly connected with the first split body (3a) and the second split body (3b), respectively, and one end of the transmission rod (5) extends into the space between the first split body (3a) and the second split body (3b) and is sleeved on the outer side of the transmission shaft (6).

5. Labor saving bicycle according to claim 1 or 2 or 3, wherein the transmission wheel (7) is disc shaped and arranged on the upper part of the driving wheel (1).

6. The labor-saving bicycle of claim 5, further comprising a speed-change gear set, wherein the input end of the speed-change gear set is connected with the transmission wheel (7), and the output end of the speed-change gear set can drive the driving wheel (1) to rotate through the chain (8) or the belt.

7. Labor-saving bicycle according to claim 2 or 3, characterized in that the unidirectional transmission structure (9) comprises a ratchet wheel and a pawl which are engaged in a unidirectional way, the ratchet wheel is in transmission connection with the driving wheel (1), and the pawl is correspondingly connected to the transmission rod (5).

8. Labor-saving bicycle according to claim 2 or 3, characterized in that the one-way transmission structure (9) comprises a one-way clutch.