CN206417139U - A kind of crank of bicycle up and down reciprocatingly oscillatory gearing mechanism - Google Patents

Abstract

The utility model discloses a bicycle crank up and down reciprocating swing driving device, which comprises a one-way thrust ball bearing, a deep groove ball bearing, a front bevel gear, a left and right rolling bearing, a left and right bevel gear, a middle shaft and other components; On the center shaft, the left one-way clutch and the right one-way clutch are connected to both ends of the center shaft through keys; one end of the left bevel gear and the right bevel gear are connected to the left one-way clutch and right one-way clutch respectively through keys, and Placed on the left rolling bearing and the right rolling bearing, and then fixed on the box through the left bearing seat and the right bearing seat; the left bevel gear and the right bevel gear mesh with the front bevel gear respectively; the two ends of the center shaft are placed on the In the shaft holes of the left bevel gear and the right bevel gear. The utility model simulates the normal walking posture of the human body when riding a bicycle, conforms to the physiological habits of the human body, and avoids the "dead point" phenomenon that occurs in the traditional bicycle riding process.

Description

A crank up and down reciprocating drive device for a bicycle

technical field

The utility model relates to a driving mechanism for riding a bicycle, in particular to a driving device for a bicycle crank reciprocating up and down.

Background technique

Bicycle is one of the means of transportation that people like, and it is also a way for people to have fun and exercise. In recent years, people's growing demand for a leisurely and healthy life experience has prompted the design of bicycles to fully consider the factors of the human body, and at the same time fully consider the characteristics of use by different groups of people and occasions, so that the design of bicycles is moving towards "occupation of less space". , flexible and convenient, comfortable and durable" and other characteristics continue to develop.

The drive mechanism that bicycle adopts now is to connect two pedals and crank by axis. In the process of applying force, the soles of the feet drive the crank to rotate through the force acting on the pedals, and the force that the soles of the feet acts on the pedals varies with the position of the crank, and the magnitude and direction of the acting force are also different. The force acts either radially along the crank or tangentially along the crank. Especially when the crank rotates to a position in line with the thigh, calf and hip joint, there will be two "dead spots" phenomenon, that is, the force exerted by the human body on the pedal is a radial force. At this time, the dead point position can only be changed by changing the riding posture of the human body so that the bicycle can continue to move. At this time, since the position of the saddle of the bicycle is constant relative to the position of the crank, it is difficult to apply a tangential force that drives the bicycle forward. For this reason, the rider either bends his body and bends his legs, or moves his body back a little distance, so that the soles of the feet deviate from a certain angle to the pedals to generate a horizontal component of force. Riders are prone to fatigue due to functional requirements.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and to provide a crank reciprocating drive device for a bicycle with simple structure and flexible driving. The driving device of the utility model conforms to the normal walking posture of the human body, so that the driving force can be utilized to the maximum.

The utility model is realized through the following technical solutions:

A bicycle crank up and down reciprocating swing driving device, comprising: one-way thrust ball bearing 1, deep groove ball bearing 2, front bevel gear 3, right rolling bearing 4, right bevel gear 5, center shaft 6, right deep groove ball bearing 7 , right one-way clutch 8, right bearing seat 9, front double-row sprocket 10, chain 11, rear axle 12, rear double-row sprocket 13, left bearing seat 15, left rolling bearing 16, left one-way clutch 17, left deep Groove ball bearing 18, left bevel gear 19, left crank 20, left pedal 21, box body 22, right crank 23, right pedal 24;

The front bevel gear 3 is placed on the deep groove ball bearing 2 and the one-way thrust ball bearing 1, and is fixed with the box body 22 through the bearing seat;

The front double-row sprocket 10 is fixed on the central shaft 6, and the left one-way clutch 17 and the right one-way clutch 8 are connected with the two ends of the central shaft 6 by keys;

One end of the left bevel gear 19 and the right bevel gear 5 is connected with the left one-way clutch 17 and the right one-way clutch 8 respectively by a key, and is respectively placed on the left rolling bearing 16 and the right rolling bearing 4, and then through the left bearing seat 15 and the right bearing The seat 9 is fixed on the box; the left bevel gear 19 and the right bevel gear 5 mesh with the front bevel gear 3 respectively;

The two ends of the middle shaft 6 are placed in the shaft holes of the left bevel gear 19 and the right bevel gear 5 through the left deep groove ball bearing 18 and the right deep groove ball bearing 7;

Back double row sprocket 13 is contained on the rear axle 12, and front double row sprocket 10 is connected with rear double row sprocket 13 by chain 11, is used for the transmission of power.

The other ends of the left bevel gear 19 and the right bevel gear 5 are screwed to one end of the left crank 20 and the right crank 23 respectively.

The other end of left crank 20, right crank 23 is connected with left pedal 21 and right pedal 24.

A sprocket 14 is installed on the right end of the rear axle 12 .

When the bicycle is in motion, the force exerted by the lower limbs of the human body or the pedaling force formed by the weight of the human body through the soles of the left and right feet act on the left pedal 21 and the right pedal 24 of the bicycle respectively; specifically, the following two motion modes are included:

Mode one:

First set the pedaling force applied by the human body to act on the left pedal 21, the left crank 20 fixedly connected with the left pedal 21 and the left bevel gear 19 rotate downward together, and drive the central shaft 6 through the left one-way clutch 17 Rotate, then the front double row gear 10 on the central axis 6 drives the rear double row gear 13 to rotate through the chain 11, and the bicycle moves forward. At the same time, through the meshing effect between the gears, the front bevel gear 3 rotates, driving the right bevel gear 5 to rotate, and the right crank 23 connected to it rotates, and the right pedal 24 rises, thereby realizing the reversing of the left crank 20 and the right crank 23 of the bicycle ;

Mode two:

Suppose again that the pedaling force of the human body acts on the right pedal 24, the right crank 23 fixedly connected with the right pedal 24 and the right bevel gear 5 rotate downward together, and the central shaft 6 is driven by the right one-way clutch 8 to rotate, then The front double-row sprocket 10 on the central axis 6 drives the rear double-row sprocket 13 to rotate through the chain, and the bicycle moves forward; at the same time, through the meshing action between the gears, the front bevel gear 3 rotates, driving the left bevel gear 19 to rotate, and is connected with it When the left crank 20 of the bicycle rotates, the left pedal 21 rises, thereby realizing the reversing of the left crank 20 and the right crank 23 of the bicycle.

Compared with the prior art, the utility model has the following advantages and effects:

The utility model cleverly changes the original crank turnover drive mode into the crank up and down reciprocating swing drive mode through the series connection of the reversing mechanism and the transmission mechanism, and can use the body weight to drive the bicycle forward. When the left crank swings down to drive the left bevel gear to rotate, through meshing, the front bevel gear rotates, thereby driving the right bevel gear to rotate, and then the right crank rises to realize the up and down reciprocating action of the left and right cranks.

The one-way clutch of the utility model is installed on both ends of the central shaft, and is connected with the left/right bevel gear through a key, one end of the left/right bevel gear is connected on the left/right crank, and the double-row chain wheel is installed on the central shaft. When the left crank swings downward, the left bevel gear is driven to rotate, and the central shaft is driven to rotate through the one-way clutch, thereby driving the sprocket to rotate to realize bicycle movement. At the same time, the right crank rises, and the right one-way clutch plays the role of isolating power.

In summary, the utility model simulates the normal walking posture of the human body when riding a bicycle, conforms to the physiological habits of the human body, and avoids the "dead point" phenomenon that occurs during the traditional bicycle riding process. It changes the way that traditional bicycles rely on pedaling force to drive the bicycle forward, and can use the body's gravity to drive the bicycle forward, with large driving force and labor-saving. The space mechanism is used to combine the drive sprocket, the structure is more compact, the technical means are simple and easy, and the occupied space is small.

Description of drawings

Fig. 1 is a schematic front view of the crank up and down reciprocating swing driving device of the utility model bicycle.

Fig. 2 is a schematic diagram of the B-B section structure in Fig. 1 .

detailed description

Below in conjunction with specific embodiment the utility model is described in further detail.

Example

As shown in Figures 1 to 2. The utility model discloses a crank up and down reciprocating drive device for a bicycle, comprising: a one-way thrust ball bearing 1, a deep groove ball bearing 2, a front bevel gear 3, a right rolling bearing 4, a right bevel gear 5, a center shaft 6, a right Deep groove ball bearing 7, right one-way clutch 8, right bearing seat 9, front double-row sprocket 10, chain 11, rear axle 12, rear double-row sprocket 13, left bearing seat 15, left rolling bearing 16, left one-way Clutch 17, left deep groove ball bearing 18, left bevel gear 19, left crank 20, left pedal 21, casing 22, right crank 23, right pedal 24;

The front bevel gear 3 is placed on the deep groove ball bearing 2 and the one-way thrust ball bearing 1, and is fixed with the box body 22 through the bearing seat;

The front double-row sprocket 10 is fixed on the central shaft 6, and the left one-way clutch 17 and the right one-way clutch 8 are connected with the two ends of the central shaft 6 by keys;

One end of the left bevel gear 19 and the right bevel gear 5 is connected with the left one-way clutch 17 and the right one-way clutch 8 respectively by a key, and is respectively placed on the left rolling bearing 16 and the right rolling bearing 4, and then through the left bearing seat 15 and the right bearing The seat 9 is fixed on the box; the left bevel gear 19 and the right bevel gear 5 mesh with the front bevel gear 3 respectively;

The two ends of the middle shaft 6 are placed in the shaft holes of the left bevel gear 19 and the right bevel gear 5 through the left deep groove ball bearing 18 and the right deep groove ball bearing 7;

Back double row sprocket 13 is contained on the rear axle 12, and front double row sprocket 10 is connected with rear double row sprocket 13 by chain 11, is used for the transmission of power.

The other ends of the left bevel gear 19 and the right bevel gear 5 are screwed to one end of the left crank 20 and the right crank 23 respectively.

The other end of left crank 20, right crank 23 is connected with left pedal 21 and right pedal 24.

A sprocket 14 is installed on the right end of the rear axle 12 .

When a bicycle is in motion, the force exerted by the lower limbs of the human body or the pedaling force formed by the weight of the human body through the soles of the left and right feet act on the left and right pedals of the bicycle respectively. First set the pedaling force applied by the human body to act on the left pedal 21, the left crank 20 fixedly connected with the left pedal 21 and the left bevel gear 19 rotate downward together, and drive the central shaft 6 through the left one-way clutch 17 Rotate, then the front double row gear 10 on the central axis 6 drives the rear double row gear 13 to rotate through the chain 11, and the bicycle moves forward. Simultaneously through the engagement between the gears, the front bevel gear 3 rotates, driving the right bevel gear 5 to rotate, and the right crank 23 connected with it rotates, and the right pedal 24 rises. Because the right one-way clutch 8 isolates the power, the right The movement of the mechanism will not affect the movement of the bicycle, so as to achieve the purpose of reversing the left and right cranks of the bicycle.

Suppose again that the pedaling force of the human body acts on the right pedal 24, the right crank 23 fixedly connected with the right pedal 24 and the right bevel gear 5 rotate downward together, and the central shaft 6 is driven by the right one-way clutch 8 to rotate, then The front double sprocket 10 on the central axis 6 drives the rear double sprocket 13 to rotate through the chain, and the bicycle moves forward. Simultaneously through the engagement between the gears, the front bevel gear 3 rotates, driving the left bevel gear 19 to rotate, and the left crank 20 connected to it rotates, and the left foot pedal 21 rises. Because the left one-way clutch 17 isolates the power, the left The movement of the mechanism will not affect the movement of the bicycle, so as to achieve the purpose of reversing the left and right cranks of the bicycle.

The utility model is equally applicable to a tricycle, except that there are two rear wheels with compartments, and the rider's riding method is also the same. Simultaneously, the utility model is suitable for vehicles or transmission equipment driven by various human lower limbs.

As mentioned above, the utility model can be better realized.

The implementation of the present utility model is not limited by the above-mentioned examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model should be equivalent replacement methods. Included within the protection scope of the present utility model.

Claims (5)

1. A crank up and down reciprocating driving device for a bicycle, characterized in that it comprises: a one-way thrust ball bearing (1), a deep groove ball bearing (2), a front bevel gear (3), a right rolling bearing (4), a right cone Gear (5), center shaft (6), right deep groove ball bearing (7), right one-way clutch (8), right bearing seat (9), front double row sprocket (10), chain (11), rear Shaft (12), rear double row sprocket (13), left bearing seat (15), left rolling bearing (16), left one-way clutch (17), left deep groove ball bearing (18), left bevel gear (19) , left crank (20), left pedal (21), casing (22), right crank (23), right pedal (24); The front bevel gear (3) is placed on the deep groove ball bearing (2) and the one-way thrust ball bearing (1), and is fixed with the box body (22) through the bearing seat; The front double-row sprocket (10) is fixed on the central shaft (6), and the left one-way clutch (17) and the right one-way clutch (8) are connected with the two ends of the central shaft (6) by a key; One end of left bevel gear (19) and right bevel gear (5) is connected with left one-way clutch (17) and right one-way clutch (8) respectively by key, and is respectively placed on left rolling bearing (16) and right rolling bearing (4 ), and then fixed on the box through the left bearing seat (15) and the right bearing seat (9); the left bevel gear (19) and the right bevel gear (5) mesh with the front bevel gear (3) respectively; The two ends of the middle shaft (6) are placed in the shaft holes of the left bevel gear (19) and the right bevel gear (5) through the left deep groove ball bearing (18) and the right deep groove ball bearing (7). 2. The crank reciprocating drive device of the bicycle according to claim 1, characterized in that: the rear double-row sprocket (13) is mounted on the rear axle (12), and the front double-row sprocket (10) passes through the chain (11 ) is connected with rear double row sprocket wheel (13), is used for the transmission of power. 3. According to claim 1 or 2 described bicycle crank up and down reciprocating drive device, it is characterized in that: the other end of left bevel gear (19) and right bevel gear (5) is connected with left crank (20) and right crank ( 23) one end threaded connection. 4. The crank reciprocating drive device of the bicycle according to claim 3, characterized in that: the left crank (20), the other end of the right crank (23) and the left pedal (21) and the right pedal (24) )connect. 5. According to claim 3, said bicycle crank up and down reciprocating drive device is characterized in that: the right end of the rear axle (12) is equipped with a sprocket (14).