Bicycle brake energy recycling device

Abstract

The application discloses a bicycle brake energy recycling device, wherein the inner side of the lower end of a front fork leg is provided with a brake disc through a wheel shaft, and the inner periphery of the brake disc is provided with a concave disc; the rear side of the lower section of the front fork leg is provided with a device body, a through hole is arranged in the middle of a fixing plate, a brake wire is arranged in the through hole, and fixing holes are further arranged at the two ends of the fixing plate, which are connected with one end of guide columns, and the other end of the guide columns is fixedly connected with the front fork leg; guide seats are arranged at the two ends of a gear box, a driving gear is sequentially connected with a first gear set, a second gear set and a motor gear, and the motor gear is connected with a brush DC motor fixed on a gear box connecting plate; the application can efficiently collect and utilize the lost energy during braking, has high energy conversion efficiency, can realize smooth brake force control and has no brake jerk feeling, has simple structure, good manufacturing process, low cost and is convenient to maintain, and can be used for other various traffic vehicles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle energy recovery, in particular to a bicycle brake energy recovery device. BACKGROUND

[0002] Vehicle industry is an important part of the world economy, and plays an important role in the national economy and social development. The use of vehicles not only expands the radius of human life, but also speeds up the transportation and circulation speed of social goods, so that vehicles gradually become an indispensable means of transportation for human beings and play an important role in daily work and production. With the rapid development of society, the number of vehicles is increasing, and the exhaust emissions are deteriorating the environment, while there is also a problem of energy shortage. In order to alleviate the environmental and energy problems, scholars have proposed various energy-saving and emission-reducing schemes, and the recovery and utilization of energy loss of vehicle brake is one of them.

[0003] As a common means of transportation, bicycles inevitably need to brake and decelerate in daily use. In the process of braking and deceleration, the kinetic energy of the bicycle is wasted under the action of the braking system; when the bicycle goes down a steep slope, a large amount of gravitational potential energy is also wasted by braking to maintain the speed. Therefore, the recovery and utilization of the energy wasted by the bicycle brake can not only save energy consumption, but also is an effective environmental protection measure. SUMMARY

[0004] In view of the above problems, the present application provides a bicycle brake energy recovery device, which can effectively collect and utilize the energy lost during the braking process of the bicycle, and also effectively collect and utilize the gravitational potential energy, achieving high energy conversion efficiency.

[0005] The purpose of the present application is achieved. A bicycle brake energy recovery device, comprising an electric handlebar installed at one end of a bicycle stem handlebar and a front fork foot installed at a lower end of the stem, a support is fixedly installed on the inner side of the electric handlebar, a brake handle is connected to the connection between the support and the stem, and a first switch and a second switch are installed between the front end of the support and the brake handle;

[0006] A brake disc is installed on the inner side of the lower end of the front fork foot through an axle, the brake disc rotates synchronously with the wheel, and a concave disc is arranged on the inner periphery of the brake disc; a device body is installed on the rear side of the lower segment of the front fork foot, the device body comprises a fixed plate and a gear box, a through hole is arranged in the middle of the fixed plate, a brake cable is installed in the through hole, a brake sleeve is installed on the brake cable, one end of the brake cable is connected with the brake handle, and the other end is connected with the gear box; fixed holes are further arranged at both ends of the fixed plate, one end of a guide column is connected with the fixed holes, and the other end of the guide column is fixedly connected with the front fork foot;

[0007] The variable speed box is in a rectangular frame structure, guide seats are arranged at both ends of the variable speed box, the guide seats are connected with guide columns sleeved with springs, stepped holes are arranged in the guide seats, one end of the spring is installed in the stepped hole, connecting plates are arranged at both ends of the guide seat, a driving gear, a first variable speed gear set and a second variable speed gear set are sequentially installed in the variable speed box frame through the connecting plates, the driving gear is sequentially connected with the first variable speed gear set, the second variable speed gear set and a motor gear, the motor gear is connected with a brush DC motor fixed on the connecting plate of the variable speed box; one end of the rotating shaft of the driving gear is provided with an inner friction wheel, the inner friction wheel is located at the inner side opposite to the front fork leg of the driving gear; the other end of the rotating shaft of the driving gear is provided with an outer friction wheel, the outer friction wheel is in a ratchet structure; the distance between the inner friction wheel and the outer friction wheel opposite to each other is equal to the distance between the outer periphery of the brake disc and the outer periphery of the concave disc; the driving gear, the first variable speed gear set and the second variable speed gear set are all fixedly connected with rotating shafts, and both ends of the rotating shafts are connected with the variable speed box frame through bearings.

[0008] The electric handlebar is connected with the DC speed regulator through wires, the DC speed regulator and the charging module are connected in parallel between the battery and the brush DC motor, the first switch is installed between the brush DC motor and the DC speed regulator connection circuit, and the second switch is installed between the brush DC motor and the charging module connection circuit.

[0009] Further, the first switch and the second switch are both provided with elastic elements and cannot be self-locked, wherein the first switch is a normally open switch, and the second switch is a normally closed switch.

[0010] Further, the outer plane of the concave disc is 2mm lower than the outer plane of the brake disc.

[0011] Further, the first variable speed gear set and the second variable speed gear set are both composed of a large gear and a small gear, and the large gear is engaged with the small gear.

[0012] Further, the small gear of the first variable speed gear set is engaged with the driving gear.

[0013] Further, the large gear of the second variable speed gear set is engaged with the motor gear.

[0014] Further, the outer periphery of the inner friction wheel and the outer periphery of the outer friction wheel are respectively staggered and frictionally connected with the outer plane of the brake disc.

[0015] The application can efficiently collect and utilize the energy lost during braking, has high energy conversion efficiency, can realize smooth brake force control without brake jerk, has simple structure, good manufacturing process, low cost, is convenient to maintain, and can be used for various traffic vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is an installation structure schematic diagram of the application.

[0017] Figure 2 is a perspective view of the device body 10 structure in the present application;

[0018] Figure 3 is a partial cross-sectional view of the brake disc 2 combined with the inner friction wheel 103 and the outer friction wheel 104 structure in the present application;

[0019] Figure 4 is Figure 3 is a structure schematic view of the outer friction wheel 104 in the present application;

[0020] Figure 5 is a schematic view of the installation structure of the brake lever 7 and the first switch S1 and the second switch S2 in the present application;

[0021] Figure 6 is a circuit coupling block diagram in the present application;

[0022] In the figure: 1 - front fork leg, 2 - brake disc, 21 - concave disc, 3 - axle, 4 - brake sleeve, 5 - brake cable, 6 - spoke, 7 - brake lever, 8 - bracket, 9 - electric handlebar, 10 - device body, 101 - gear box, 102 - driving gear, 103 - inner friction wheel, 104 - outer friction wheel, 105 - first gear set, 106 - second gear set, 107 - motor gear, 108 - brush DC motor, 109 - guide column, 110 - spring, 111 - guide seat, 112 - fixed plate, 113 - rotating shaft, 301 - charging module, 302 - DC speed regulator, 303 - battery, S1 - first switch, S2 - second switch. DETAILED DESCRIPTION

[0023] The present application will be described in detail below in conjunction with the drawings in the examples of the present application. Please refer to Figures 1 to 6 A bicycle brake energy recycling device, comprising an electric handlebar 9 installed at one end of a bicycle head tube handlebar and a front fork leg 1 installed at the lower end of the head tube, a bracket 8 fixedly installed on the inner side of the electric handlebar 9, a brake lever 7 connected to the connection between the bracket 8 and the head tube, a first switch S1 and a second switch S2 installed between the front end of the bracket 8 and the brake lever 7, and elastic elements installed in the first switch S1 and the second switch S2 and unable to self-lock, wherein: the first switch S1 is a normally open switch, the switch is in open circuit when the first switch S1 is not pressed, and the switch is in conduction when the first switch S1 is pressed; the second switch S2 is a normally closed switch, the switch is in conduction when the second switch S2 is not pressed, and the switch is in open circuit when the second switch S2 is pressed.

[0024] A brake disc 2 is mounted between the inner side of the lower end of the front fork leg 1 and the fender 6 through the axle 3, the brake disc 2 rotates synchronously with the wheel, the inner periphery of the brake disc 2 is provided with a concave disc 21, the outer plane of the concave disc 21 is 2mm lower than the outer plane of the brake disc 2. The rear side of the lower section of the front fork leg 1 is mounted with a device body 10, the device body 10 includes a fixed plate 112 and a gear box 101, the middle of the fixed plate 112 is provided with a through hole, the through hole is provided with a brake wire 5, the brake wire 5 is provided with a brake sleeve 4, one end of the brake wire 5 is connected with a brake handle 7, the other end is connected with the gear box 101; the both ends of the fixed plate 112 are provided with fixed holes, the fixed holes are connected with one end of a guide column 109, the other end of the guide column 109 is fixedly connected with the front fork leg 1.

[0025] The gear box 101 is a rectangular frame structure, both ends of the gear box 101 are provided with guide seats 111, the guide seats 111 are connected with the guide column 109 provided with a spring 110, the guide seat 111 is provided with a stepped hole, one end of the spring 110 is mounted in the stepped hole, both ends of the guide seat 111 are provided with connecting plates, the gear box 101 is provided with a driving gear 102, a first gear group 105 and a second gear group 106 through the connecting plates, the first gear group 105 and the second gear group 106 are composed of a large gear and a small gear, and the large gear is engaged with the small gear. The driving gear 102 is connected with the first gear group 105, the second gear group 106 and the motor gear 107 in sequence, wherein: the small gear of the first gear group 105 is engaged with the driving gear 102; the large gear of the second gear group 106 is engaged with the motor gear 107; the motor gear 107 is connected with a brush DC motor 108 fixed on the connecting plate of the gear box 101; one end of the rotating shaft 113 of the driving gear 102 is provided with an inner friction wheel 103, the inner friction wheel 103 is located on the inner side opposite to the front fork leg 1, the outer periphery of the inner friction wheel 103 and the outer periphery of an outer friction wheel 104 are respectively staggered and frictionally connected with the outer plane of the brake disc 2. The other end of the rotating shaft 113 of the driving gear 102 is provided with the outer friction wheel 104, the outer friction wheel 104 is a ratchet structure; the distance between the inner friction wheel 103 and the outer friction wheel 104 opposite to each other is equal to the distance between the outer periphery of the brake disc 2 and the outer periphery of the concave disc 21; the first gear group 105, the second gear group 106 and the driving gear 102 are respectively fixedly connected with the rotating shaft 113, both ends of the rotating shaft 113 are connected with the frame of the gear box 101 through bearings.

[0026] The electric handlebar 9 is connected with a DC speed regulator 302 through a wire, a charging module 301 and the DC speed regulator 302 are connected in parallel between the battery 303 and the brush DC motor 108, a first switch S1 is installed between the brush DC motor 108 and the DC speed regulator 302 connection circuit, a second switch S2 is installed between the brush DC motor 108 and the charging module 301 connection circuit.

[0027] In the present application: the brush DC motor 108 is selected as a 3420 brush DC motor with a rated voltage of 12 volts;

[0028] The charging module 301 is composed of a DC LC filter voltage stabilizing module and a commonly used CN3768 module in series;

[0029] The DC speed regulator 302 is a PWM brush DC motor speed regulator, which is relatively mature in technology and low in cost;

[0030] The storage battery 303 is selected as a lead-acid storage battery with a voltage of 12 volts.

[0031] The operation method of the present application is as follows:

[0032] (1) When the bicycle is running, the brake disc 2 installed at the lower end of the inner side of the front fork foot 1 rotates with the wheel fender 6, the brake handle 7 is loosened, and the gear box 101 is tightly attached to the front fork foot 1 under the action of the spring 110 (as shown in Figure 2 At this time, the inner friction wheel 103 is located in the concave disc 21, the inner friction wheel 103 and the brake disc 2 are not in contact with each other (as shown in Figure 3 ), and the driving gear 102 cannot be driven to rotate, only the outer friction wheel 104 is in contact with the brake disc 2 (as shown in Figure 3 ), and since the inner part of the outer friction wheel 104 is a ratchet structure (as shown in Figure 4 ), the brake disc 2 only drives the outer friction wheel 104 to rotate counterclockwise.

[0033] (2) When the bicycle is running down a steep slope or needs to be braked to reduce speed, press the brake handle 7 (as shown in Figure 5The brake handle 7 is rotated, and the two switches are popped up at the same time. Since the first switch SI is a normally open switch and the second switch S2 is a normally closed switch, the first switch SI is in an off state, and the direct current speed regulator 302 is turned off. The second switch S2 is in an on state, and the charging module 301 is connected. The brake cable 5 pulls the gear box 101 to move towards the fixed plate 112. At this time, the inner friction wheel 103 crosses the concave disc 21 and contacts the brake disc 2. The brake disc 2 drives the inner friction wheel 103, the driving gear 102 and the rotating shaft 113 to rotate synchronously through friction. In turn, the first gear group 105, the second gear group 106 and the motor gear 107 are rotated. Through gear transmission, the rotating speed is amplified to drive the brush direct current motor 108 to rotate at high speed. The brush direct current motor 108 rotates to generate electricity. The brush direct current motor 108 selects a 3420 brush direct current motor with a rated voltage of 12 volts (3420 means that the rotor is 34 mm long and 20 mm in diameter). The electricity generated by the brush direct current motor 108 charges the storage battery 303 through the charging module 301. The charging module 301 is composed of a direct current LC filter voltage stabilizing module and a commonly used CN3768 module in the market. The storage battery 303 selects a lead-acid storage battery with a voltage of 12 volts. The storage battery 303 is fixed on the bicycle frame. At this time, the outer friction wheel 104 crosses the edge of the brake disc 2, and the movement state of the outer friction wheel 104 does not need to be concerned.

[0034] (3) The force of pressing the brake handle 7 can be controlled to continuously control the left and right movement of the gear box 101, so as to smoothly control the brake force. When the pressing force of the brake handle 7 is increased, the distance of the movement of the gear box 101 towards the fixed plate 112 is increased. At this time, the distance between the inner friction wheel 103 and the axle 3 is increased. When the rotating speed of the brake disc 2 is unchanged, the inner friction wheel 103 and the driving gear 102 can obtain a higher rotating speed. Thus, the rotating speed of the brush direct current motor 108 is also higher. The electricity generation force of the brush direct current motor 108 is increased, and the brake force is also increased. When the pressing force of the brake handle 7 is reduced, the electricity generation force is reduced, and the brake force is reduced.

[0035] (4) When the electric power assist is needed, the brake handle 7 is released, and the brake handle 7 continuously presses the two switches. Since the first switch SI is a normally open switch and the second switch S2 is a normally closed switch, the first switch SI is in an on state, and the direct current speed regulator 302 is connected. The second switch S2 is in an off state, and the charging module 301 is disconnected. The gear box 101 is tightly attached to the front fork leg 1 under the action of the spring 110. At this time, the inner friction wheel 103 is located in the concave disc 21, and the inner friction wheel 103 and the brake disc 2 are not in contact with each other (as shown in Figure 3 At this time, the outer friction wheel 104 contacts the brake disc 2 (as shown in Figure 3The battery 303 is powered, using the common PWM brush DC motor speed controller to drive the brush DC motor 108 rotation, through the motor gear 107, the second gear set 106, the first gear set 105, the driving gear 102 to reduce the speed amplification torque, drive the outer friction wheel 104 counterclockwise rotation, the brake disc 2 on the outer friction wheel 104 force direction is clockwise, the outer friction wheel 104 internal ratchet does not rotate, thereby driving the brake disc 2 to assist the vehicle forward. Through the electric handlebar 9 (as shown in Figure 1 The brush DC motor 108 speed is controlled, thereby controlling the size of the electric assist.

[0036] The present application can effectively collect and utilize the energy loss in the process of bicycle braking, and can effectively collect and utilize the gravitational potential energy, and has high energy conversion efficiency. In addition, the device can realize smooth brake force control, no brake jerk feeling, slightly modified and widely used in various vehicles.

Claims

1. A bicycle brake energy recovery device, characterized by, The electric handlebar (9) is fixedly arranged on the inner side of the handlebar stem, and the brake handle (7) is connected to the connecting part of the handlebar stem and the bracket (8); the first switch (S1) and the second switch (S2) are arranged between the front end of the bracket (8) and the brake handle (7); The brake disc (2) is arranged on the inner side of the lower end of the front fork leg (1) through the axle (3), and rotates synchronously with the wheel; the concave disc (21) is arranged on the inner periphery of the brake disc (2); the device body (10) is arranged on the rear side of the lower section of the front fork leg (1), and the device body (10) comprises a fixed plate (112) and a gear box (101); the through hole is arranged in the middle of the fixed plate (112), the brake cable (5) is arranged in the through hole, the brake cable (5) is sleeved with the brake sleeve (4), one end of the brake cable (5) is connected with the brake handle (7), and the other end is connected with the gear box (101); the fixed holes are arranged at both ends of the fixed plate (112), one end of the guide column (109) is connected with the fixed holes, and the other end of the guide column (109) is fixedly connected with the front fork leg (1); The gear box (101) is in the structure of a rectangular frame body, the guide seat (111) is arranged at both ends of the gear box (101), the guide column (109) is connected with the spring (110) sleeved on the outer periphery, the stepped hole is arranged in the guide seat (111), one end of the spring (110) is arranged in the stepped hole, the connecting plates are arranged at both ends of the guide seat (111), the driving gear (102), the first gear group (105) and the second gear group (106) are sequentially arranged in the frame body of the gear box (101) through the connecting plates, the driving gear (102) is sequentially connected with the first gear group (105), the second gear group (106) and the motor gear (107), the motor gear (107) is connected with the brush DC motor (108) fixed on the connecting plate of the gear box (101); the inner friction wheel (103) is arranged at one end of the rotating shaft (113) of the driving gear (102), and the inner friction wheel (103) is arranged on the inner side opposite to the front fork leg (1); the outer friction wheel (104) is arranged at the other end of the rotating shaft (113) of the driving gear (102), and the outer friction wheel (104) is in the structure of a ratchet wheel; the distance between the inner friction wheel (103) and the outer friction wheel (104) is equal to the distance between the outer periphery of the brake disc (2) and the outer periphery of the concave disc (21); the first gear group (105), the second gear group (106) and the driving gear (102) are fixedly connected with the rotating shaft (113), and both ends of the rotating shaft (113) are connected with the frame body of the gear box (101) through bearings. The electric handlebar (9) is connected with the DC speed regulator (302) through a wire, the DC speed regulator (302) and the charging module (301) are connected in parallel between the battery (303) and the brush DC motor (108), the first switch (S1) is installed between the brush DC motor (108) and the connection circuit of the DC speed regulator (302), and the second switch (S2) is installed between the brush DC motor (108) and the connection circuit of the charging module (301).

2. The bicycle brake energy recovery device according to claim 1, wherein, The first switch (S1) and the second switch (S2) are provided with elastic elements and cannot be self-locked, wherein the first switch (S1) is a normally open switch, and the second switch (S2) is a normally closed switch.

3. The bicycle brake energy recovery device of claim 1, wherein, The outer plane of the concave disc (21) is 2mm lower than the outer plane of the brake disc (2).

4. The bicycle brake energy recovery device of claim 1, wherein, The first gear group (105) and the second gear group (106) are both composed of a large gear and a small gear, and the large gear is engaged with the small gear.

5. The bicycle brake energy recovery device according to claim 1 or 4, wherein The small gear of the first gear group (105) is engaged with the driving gear (102).

6. The bicycle brake energy recovery device according to claim 1 or 4, wherein The large gear of the second gear group (106) is engaged with the motor gear (107).

7. The bicycle brake energy recovery device of claim 1, wherein, The outer periphery of the inner friction wheel (103) and the outer periphery of the outer friction wheel (104) are respectively frictionally connected with the outer plane of the brake disc (2) in a staggered manner.

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