CN216070382U

CN216070382U - Bicycle transmission device based on multi-piece type square chain wheel cone pulley

Info

Publication number: CN216070382U
Application number: CN202122734097.7U
Authority: CN
Inventors: 贾玉军
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-03-18
Anticipated expiration: 2031-11-09

Abstract

The utility model relates to a bicycle transmission device based on a multi-piece type square chain wheel cone pulley. The bicycle rear wheel driving device comprises a pedal driving assembly and a rear driving assembly, wherein the pedal driving assembly is arranged on a middle shaft sleeve of a bicycle, the rear driving assembly is arranged in the middle of a rear wheel of the bicycle, and the pedal driving assembly and the rear driving assembly are in transmission through a chain; the rear driving assembly comprises a rear axle assembly and a rear cone pulley assembly arranged on the side part of the rear axle assembly; the rear shaft assembly comprises a rear shaft, a hub is arranged in the middle of the rear shaft, a rear bearing is arranged between the hub and the rear shaft, external thread parts are arranged at two ends of the rear shaft, and fastening nuts are arranged on the external thread parts; the rear cone pulley component comprises a square cone pulley and an overrunning clutch arranged in the middle of the square cone pulley, and the square cone pulley is composed of a plurality of superposed square cone pulleys; and a transmission with a driving chain capable of moving on the square tooth disc tower wheel is arranged on the side part of the rear tower wheel assembly, and a speed change operating wire is connected to the transmission. The transmission mechanism of the utility model reduces the fatigue feeling of riding and improves the riding pleasure.

Description

Bicycle transmission device based on multi-piece type square chain wheel cone pulley

Technical Field

The utility model belongs to the technical field of bicycle parts, and particularly relates to a bicycle transmission device based on a multi-piece type square chain wheel cone pulley.

Background

The bicycle transmission mechanism is a mechanism for converting riding torque of a rider into bicycle advancing power, is one of main mechanisms of a bicycle, directly determines the labor intensity of the bicycle during riding by the advantages and disadvantages of the design of the transmission mechanism, and has very important influence on riding comfort and riding efficiency.

The existing bicycle transmission mechanism generally comprises a front chain wheel driven by a pedal driving component in a pedal mode, the pedal driving component and the front chain wheel are installed on a middle shaft of a bicycle frame, the bicycle transmission mechanism further comprises a rear cone pulley component connected with the chain wheel through a chain, the front chain wheel is in transmission connection with the rear cone pulley component through the chain, when pedal power is input through the pedal driving component, the front chain wheel drives the rear cone pulley component, the rear cone pulley component drives a rear wheel to rotate, and the bicycle moves forward. The transmission mechanism with the structure mentioned above has become a conventional design of a transmission mechanism of a bicycle, in such a design, if a rider rides the bicycle on a straight road, the force of two legs acts on the pedal mechanism relatively uniformly, that is, the rider inputs riding torque to the transmission mechanism relatively linearly and continuously through the pedal mechanism, and in the process of continuous pedaling, the fatigue feeling caused by the resistance transmitted to the rider by the bicycle is also continuously and stably changed, that is, under the condition of continuous pedaling, the legs of the rider do not have rest 'intermittence', and the fatigue feeling is easy to accumulate.

On the other hand, along with the development of technique and the improvement of people's standard of living, people have proposed higher and higher requirement to the enjoyment of riding of bicycle, and people's requirement of riding is difficult to satisfy gradually to the bicycle of traditional structural design, needs to carry out the change in the aspect of the structure in order to promote the enjoyment of riding.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bicycle transmission device based on a multi-piece square chain wheel tower wheel, which can reduce the fatigue feeling of riding and improve the riding pleasure for solving the technical problems in the prior art.

The technical scheme adopted by the utility model for solving the technical problems in the prior art is as follows: a bicycle transmission device based on a multi-piece type square chain wheel cone pulley comprises a pedal driving assembly and a rear driving assembly, wherein the pedal driving assembly is arranged on a middle shaft sleeve of a bicycle, the rear driving assembly is arranged in the middle of a rear wheel of the bicycle, and the pedal driving assembly and the rear driving assembly are in transmission through a chain; the rear driving assembly comprises a rear axle assembly and a rear cone pulley assembly arranged on the side part of the rear axle assembly; the rear shaft assembly comprises a rear shaft, a hub is arranged in the middle of the rear shaft, a rear bearing is arranged between the hub and the rear shaft, external thread parts are arranged at two ends of the rear shaft, and fastening nuts are arranged on the external thread parts; the rear cone pulley component comprises a square cone pulley and an overrunning clutch arranged in the middle of the square cone pulley, and the square cone pulley is composed of a plurality of superposed square cone pulleys; and a transmission for driving a chain to shift on the square tooth disc tower wheel of the rear cone pulley assembly is arranged on the side part of the rear cone pulley assembly, and a speed change operating wire is connected to the transmission.

The utility model has the advantages and positive effects that:

compared with the traditional bicycle transmission device, the bicycle transmission device with the square crankset is reasonable in structural design, and the rear driving assembly is convenient to mount on a rear wheel by being composed of the rear shaft assembly and the rear cone pulley assembly. The square chain wheel tower wheel with the rear tower wheel component is composed of a plurality of overlapped square chain wheels, in the riding process, the chain periodically changes the driving force arm of the square chain wheel (the minimum value of the force arm is the distance between the central line of the rear shaft component and a certain side of the square chain wheel, the maximum value of the force arm is the distance between the central line of the rear shaft component and a certain angle of the square chain wheel), the driving force is input at the position with the maximum force arm, and the legs of a rider obtain intermittent rest at the position with the minimum force arm, so that the accumulation of fatigue can be avoided. In addition, the square dental disc tower wheel of back cone pulley structure provides one kind with the traditional orthocircular dental disc tower wheel structure the time different experience of riding, has promoted the enjoyment of riding passerby.

Preferably: the rear cone pulley assembly further comprises a protective cover positioned on the inner side, and the protective cover is fixedly connected with the square cone pulley.

Preferably: the pedal driving assembly comprises a front shaft assembly, a circular front chain wheel is installed at one end of the front shaft assembly, a first pedal arm with a first pedal is installed on the outer side of the front chain wheel, and a second pedal arm with a second pedal is installed at the other end of the front shaft assembly.

Preferably: the middle part of the outer side of the front chain wheel is provided with a switching block, and the inner end of the first support arm is fixedly connected with the switching block.

Preferably: the switching block is welded and fixed with the front chain wheel, and the inner end of the first support arm is welded and fixed with the switching block.

Preferably: the front axle subassembly includes that the middle part has the front axle of controlling two bosss, and the both ends of front axle are square head shape, installs the bearing frame in the outside of boss, installs the front bearing between front axle and bearing frame, all is equipped with the screw hole and is equipped with fastening screw at the both ends center of front axle in the screw hole.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the front axle assembly of FIG. 1 with a first pedal arm and a first pedal;

FIG. 3 is a front view of the rear cone pulley assembly of FIG. 1;

FIG. 4 is an external schematic view of the rear cone pulley assembly and rear axle assembly of FIG. 1;

FIG. 5 is a cross-sectional schematic view of the rear cone pulley assembly and rear axle assembly of FIG. 1.

In the figure:

1. a first pedal; 2. a first pedal arm; 3. a front chain wheel; 4. a front axle assembly; 4-1, end cover; 4-2, a front shaft; 4-3, a front bearing; 4-4, boss; 4-5, bearing seats; 4-6, fastening screws; 5. a second pedal arm; 6. a second pedal; 7. a chain; 8. a rear cone pulley assembly; 8-1, a shield; 8-2, a square tooth disc tower wheel; 8-3, an overrunning clutch; 9. a shift operating line; 10. a rear axle assembly; 10-1, flower drum; 10-2, a rear axle; 10-3, a rear bearing; 10-4, fastening a nut; 11. a transmission.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail.

Referring to fig. 1, the bicycle transmission device based on the multi-plate square chain wheel of the present invention comprises a pedal driving assembly mounted on a middle shaft sleeve of a bicycle and a rear driving assembly mounted in the middle of a rear wheel of the bicycle, wherein the pedal driving assembly and the rear driving assembly are driven by a chain 7. Wherein, pedal drive assembly is used for receiving the passerby's of riding input of riding trampling, and back drive assembly is used for trampling the input of riding that will receive and transmits the rear wheel for the bicycle, makes the bicycle advance.

Referring to fig. 2, it can be seen that:

the pedal drive assembly comprises a front axle assembly 4, a circular front crankset 3 mounted at one end of the front axle assembly 4 and a first pedal arm 2 with a first pedal 1 mounted on the outside of the front crankset 3, and a second pedal arm 5 with a second pedal 6 mounted at the other end of the front axle assembly 4. The two feet of the rider step on the first pedal 1 and the second pedal 6 respectively, and the front crankset 3 is driven to rotate through the stepping action.

In this embodiment, preceding chain wheel 3 is including the chain wheel body that has a plurality of fretworks, is equipped with tooth at the edge of chain wheel body, is equipped with the switching piece in the outside middle part of chain wheel body, the inner and switching piece fixed connection of first arm 2. Further, the adapter block is welded and fixed with the chain wheel body, and the inner end of the first support arm 2 is welded and fixed with the adapter block, so that the first support arm 2 and the front chain wheel 3 form a combined body and are integrally mounted on the end part of the front shaft assembly 4.

In the embodiment, the front shaft assembly 4 comprises a front shaft 4-2 with a left boss 4-4 and a right boss 4-4 in the middle, two ends of the front shaft 4-2 are square-headed, a bearing seat 4-5 is installed on the outer side of the boss 4-4, a front bearing 4-3 is installed between the front shaft 4-2 and the bearing seat 4-5, threaded holes are formed in the centers of two ends of the front shaft 4-2, and fastening screws 4-6 are installed in the threaded holes.

Specifically, the outer wall of the bearing seat 4-5 is provided with external threads, the inner walls of two ends of a middle shaft sleeve of the bicycle are provided with internal threads, when the transmission mechanism is assembled and installed on a bicycle frame, the front shaft 4-2 penetrates through the middle shaft sleeve and then the front bearing 4-3 and the bearing seat 4-5 are installed from two ends, the two bearing seats 4-5 and the middle shaft sleeve are fixedly connected through the threads, the front shaft 4-2 is installed in the middle shaft sleeve, and due to the limiting effect of the left boss 4-4 and the right boss 4-4, the front shaft 4-2 can only rotate and cannot move in a translation mode along the axial direction.

A through square shaft hole is formed in the inner end of the first support arm 2, the middle of the switching block and the middle of the front chain wheel, and the end part of the front shaft 4-2 penetrates through the square shaft hole and is screwed into a fastening screw 4-6 for fixed installation; the inner end of the second support arm 5 is provided with a through square shaft hole, and the end part of the front shaft 4-2 penetrates through the square shaft hole and is screwed into a fastening screw 4-6 for fixed installation. In order to improve the smoothness of the appearance, the outer ends of the square shaft holes of the first support arm 2 and the second support arm 5 are buckled and provided with end covers 4-1 made of plastic materials, and fastening screws 4-6 are packaged inside.

Referring to fig. 3, 4 and 5, it can be seen that:

the rear driving assembly comprises a rear shaft assembly 10 and a rear cone pulley assembly 8 arranged on the side of the rear shaft assembly 10, and the front chain wheel 3 is in transmission connection with the rear cone pulley assembly 8 through a chain 7.

The rear axle assembly 10 comprises a rear axle 10-2, a hub 10-1 is mounted in the middle of the rear axle 10-2, a rear bearing 10-3 is mounted between the hub 10-1 and the rear axle 10-2, external thread portions are arranged at two ends of the rear axle 10-2, and fastening nuts 10-4 are arranged on the external thread portions. The hub 10-1 is an existing component, and is commercially available, and the structure thereof will not be described in detail. When installed, the rear axle 10-2 is installed between two rear forks of a bicycle frame, and specifically, the end of the rear axle 10-2 is inserted into a notch at the end of the rear fork and is fastened and fixed by a fastening nut 10-4, so that the rear axle 10-2 is not rotated unlike the front axle 4-2 and the rear axle 10-2. The spokes on the rear wheel are connected with an annular connecting plate arranged on the hub 10-1 in the prior art, which is not described in detail.

The rear cone pulley component 8 comprises a square chain wheel cone pulley 8-2 and an overrunning clutch 8-3 arranged in the middle of the square chain wheel cone pulley 8-2, and the square chain wheel cone pulley 8-2 is composed of a plurality of overlapped square chain wheels. The rear cone pulley assembly 8 also comprises a shield 8-1 positioned at the inner side, and the shield 8-1 is fixedly connected with the square chain wheel cone pulley 8-2.

A transmission 11 for shifting the drive chain 7 on the square chain wheel cone 8-2 of the rear cone pulley assembly 8 is mounted on the side of the rear cone pulley assembly 8, and a speed change operation wire 9 is connected to the transmission 11. The speed change operating wire 9 extends to a handlebar of the bicycle and is connected with a speed change operator on the handlebar, and the speed change operating wire 9 is pulled by the speed change operator, so that the speed changer 11 generates a toggle action on the chain 7, and the chain 7 moves and adjusts between different square crankshafts on the square crankset cone wheel 8-2. The transmission 11 is an existing component, commercially available, and the structure thereof will not be described in detail.

As shown in fig. 3 and 5, the square chain wheel single bodies of the square chain wheel cone 8-2 are processed and then are overlapped and assembled into a whole, and adjacent square chain wheels can be fixedly connected by rivets. The overrunning clutch 8-3 is arranged in the middle of the square toothed disc tower wheel 8-2, the rear shaft 10-2 penetrates through the middle of the overrunning clutch 8-3, the rear shaft 10-2 is in key connection with the inner ring of the overrunning clutch 8-3, and the outer ring of the overrunning clutch 8-3 is connected with the square toothed disc tower wheel 8-2 through a spline.

Description of the working principle:

the bicycle transmission device is arranged on a frame of a bicycle in a mode of figure 1, and when a rider rides the bicycle, the rider pedals a first pedal 1 and a second pedal 6 to input riding driving force through a front driving component; the front chain wheel 3 is driven to rotate, the chain 7 transmits the pedal driving effect to the rear cone pulley assembly 8, and the rear cone pulley assembly 8 transmits the driving to the rear shaft assembly 10 and the rear wheel;

as can be seen from the figure, as the rear cone pulley assembly 8 rotates, the driving arm of the chain 7 to the corresponding square cone on the square cone pulley 8-2 changes periodically, specifically: the minimum value of the force arm is the distance between the central line of the rear shaft 10-2 and one side of the square chain wheel, namely the distance of half the length of the side line of the square chain wheel, and the maximum value of the force arm is the distance between the central line of the rear shaft 10-2 and one corner of the square chain wheel, namely the distance of half the diagonal line of the square chain wheel;

when the tip of the square chain wheel moves to the top, the moment arm is the largest, and the moment is equal to the product of the moment arm and the driving force, so that under the condition that the driving force moment required by the bicycle is not changed, a larger moment only needs a smaller driving force, and a rider can input a relatively smaller pedaling force when inputting pedaling actions at the position, thereby achieving a certain labor-saving effect; when the rear step wheel assembly 8 rotates to the position shown in fig. 1, the rider can stop inputting the pedaling force for a short time, at this time, under the action of inertia (or the rider maintains a small pedaling force), the rear step wheel assembly 8 continues to rotate and rotates 45 degrees, and then the next tip of the rear step wheel assembly moves to the top, at the short pedaling gap, the fatigue feeling of the legs of the rider is relieved for a short time (i.e. accumulation of the fatigue feeling is avoided), and then the rider exerts the pedaling force again, so that the continuous riding is realized (namely the bicycle continuously advances, and the riding operation of the rider loses certain continuity); one function of the transmission 11 is to adjust the position of the chain 7 on the square-toothed disc tower wheel 8-2, and the other function is to tension the chain 7, so that the chain 7 is prevented from being separated from the square-toothed disc tower wheel 8-2 in the riding process, and the problem of chain falling is avoided.

Claims

1. A bicycle transmission device based on a multi-piece type square chain wheel cone pulley comprises a pedal driving assembly and a rear driving assembly, wherein the pedal driving assembly is arranged on a middle shaft sleeve of a bicycle, the rear driving assembly is arranged in the middle of a rear wheel of the bicycle, and the pedal driving assembly and the rear driving assembly are transmitted through a chain (7); the method is characterized in that: the rear driving assembly comprises a rear axle assembly (10) and a rear cone pulley assembly (8) arranged at the side part of the rear axle assembly (10); the rear shaft assembly (10) comprises a rear shaft (10-2), a hub (10-1) is installed in the middle of the rear shaft (10-2), a rear bearing (10-3) is installed between the hub (10-1) and the rear shaft (10-2), external thread parts are arranged at two ends of the rear shaft (10-2), and fastening nuts (10-4) are arranged on the external thread parts; the rear cone pulley component (8) comprises a square chain wheel cone pulley (8-2) and an overrunning clutch (8-3) arranged in the middle of the square chain wheel cone pulley (8-2), and the square chain wheel cone pulley (8-2) is formed by a plurality of overlapped square chain wheels; a transmission (11) with a driving chain (7) arranged on the side part of the rear cone pulley component (8) and capable of shifting on the square chain wheel cone pulley (8-2) of the rear cone pulley component (8), and a speed change operating line (9) connected on the transmission (11).

2. The multi-piece square chainwheel based bicycle transmission of claim 1, wherein: the rear cone pulley component (8) also comprises a shield (8-1) positioned at the inner side, and the shield (8-1) is fixedly connected with the square chain wheel cone pulley (8-2).

3. The multi-piece square chainwheel based bicycle transmission of claim 2, wherein: the pedal driving assembly comprises a front shaft assembly (4), a circular front chain wheel (3) is installed at one end of the front shaft assembly (4), a first pedal arm (2) with a first pedal (1) is installed on the outer side of the front chain wheel (3), and a second pedal arm (5) with a second pedal (6) is installed at the other end of the front shaft assembly (4).

4. The multi-piece square chainwheel based bicycle transmission of claim 3, wherein: the middle part of the outer side of the front chain wheel (3) is provided with a switching block, and the inner end of the first pedal arm (2) is fixedly connected with the switching block.

5. The multi-piece square chainwheel based bicycle transmission of claim 4, wherein: the switching block is welded and fixed with the front chain wheel (3), and the inner end of the first pedal arm (2) is welded and fixed with the switching block.

6. The multi-piece square chainwheel based bicycle transmission of claim 5, wherein: the front shaft assembly (4) comprises a front shaft (4-2) with a left boss and a right boss (4-4) in the middle, two ends of the front shaft (4-2) are square-head-shaped, a bearing seat (4-5) is installed on the outer side of the boss (4-4), a front bearing (4-3) is installed between the front shaft (4-2) and the bearing seat (4-5), threaded holes are formed in the centers of two ends of the front shaft (4-2), and fastening screws (4-6) are arranged in the threaded holes.