A quick-release pedal sensor

Abstract

The utility model discloses a quick-detachable pedaling sensor, comprising a sensing head (10) and a magnetic disk (20), wherein the magnetic disk (20) is assembled from two semicircular rings (21) with a plug-in structure, and the magnetic disk (20) is vertical to the middle axis of the bicycle and is suspended and connected to a crank fixing seat (25) fixed on the bicycle crank through a magnetic disk connector (23); the sensing head (10) with a sensing area (11) is connected to a frame fixing seat (18) fixed on the bicycle five-way side frame through a sensing head connector (15), and the sensing head (10) is arranged parallel to the magnetic disk (20) and the sensing area (11) is located in a circular ring-shaped area formed by a strong magnet (22) on the magnetic disk (20). The quick-detachable pedaling sensor of the utility model is not limited by the gap between the crank and the five-way, and can be installed on more than 99% of bicycle types, and a hollow tooth plate can also be easily installed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power-assisted bicycles, in particular to the technical field of pedal frequency sensors of electric power-assisted bicycles, specifically to a quick-detachable pedaling sensor. Background Art

[0002] Electric power-assisted bicycles have the characteristics of both bicycle sports and leisure and electric vehicles, but they are different from electric bicycles. Electric power-assisted bicycles use a cadence sensor installed on the bicycle's center axis to collect the user's cadence, and then output motor power to achieve the effect of electric assistance. Riders can save energy and ride farther, and they have become increasingly popular in the market in recent years.

[0003] Most of the cadence sensors used in the market are composed of a disk and a sensor. The disk is generally circular, with several magnets evenly embedded around the circumference. The sensor is composed of a circuit board with one or more Hall elements installed, and its shell. The disk is fixedly installed on the middle axis and located between the five-way and the crank, and rotates as the rider pedals. The sensor is fixed near the five-way of the bicycle frame, and its Hall element faces the magnet of the disk.

[0004] At present, cadence sensors are divided into two types: integrated and split. The integrated cadence sensor has an integrated design of disk and sensor. The installation method is: the center of the circle is placed on the middle axis; the split sensor is divided into two parts: the disk and the sensor. The installation method is: the center of the disk is positioned on the middle axis. Both types of pedaling sensors need to be placed on the middle axis, and there needs to be a 3-5mm gap between the crank and the bottom bracket. For some bicycles, the gap between the crank and the bottom bracket is only 1-2mm; and for the hollow chainrings used in high-end bicycles, the gap between the crank and the bottom bracket is only 0.5mm. In these two cases, there is no way to install a cadence sensor. Utility Model Content

[0005] The utility model aims to provide a quick-release pedaling sensor to solve the problem that a cadence sensor is limited by the gap between a crank and a bottom bracket; the quick-release pedaling sensor is not limited by the gap between the crank and the bottom bracket and can be installed on more than 99% types of bicycles.

[0006] The purpose of the utility model is solved by the following technical solutions:

[0007] A quick-release pedaling sensor includes a sensing head and a magnetic disk, and is characterized in that: the magnetic disk is assembled from two semicircular rings with a plug-in structure, and the magnetic disk is vertical to the center axis of a bicycle and suspended in the air, and is connected to a crank fixing seat fixed on the crank of the bicycle through a magnetic disk connector; the sensing head with a sensing area is connected to a frame fixing seat fixed on the bicycle five-way side frame through a sensing head connector, and the sensing head is arranged parallel to the magnetic disk, and the sensing area is located in the annular area formed by a strong magnet on the magnetic disk.

[0008] The disk connector comprises a positioning ball arranged on the back of the disk, a positioning ball arranged on one end of the crank fixing seat and a double ball hoop swing arm, wherein the two ends of the double ball hoop swing arm can respectively embed and lock the positioning ball arranged on the back of the disk and the positioning ball arranged on one end of the crank fixing seat.

[0009] The angle between the disk and the crank fixing seat is adjusted by the relative position of the double ball hoop swing arm and the two positioning heads; the locking strength of the double ball hoop swing arm locking the positioning ball is determined by the tightening degree of the positioning bolt.

[0010] Twelve long strip-shaped strong magnets are arranged in a radial direction and are distributed in a circle on the magnetic disk; six long strip-shaped strong magnets are arranged on each semicircular ring.

[0011] The strong magnet is made of neodymium iron boron; a plug is arranged on the back of one semicircular ring, and a corresponding socket is arranged on the back of the other semicircular ring; the plug on the back of one semicircular ring is inserted into the socket on the back of the other semicircular ring and fixed with screws.

[0012] The induction head includes a display panel, on which a logo light and a magnet induction light are provided. The logo light is located at the center of the display panel, and magnet induction lights are arranged in a circular distribution around the logo light, and the magnet induction lights correspond one-to-one to the strong magnets on the disk; the induction area is located at the dripping area of ​​the disc-shaped display panel.

[0013] The sensor head connector includes a positioning ball, a single-ball hoop connecting rod, and a connecting rod hemispherical head arranged on the back of the sensor head. The hoop at one end of the single-ball hoop connecting rod is used to embed and lock the positioning ball arranged on the back of the sensor head. The connecting rod of the single-ball hoop connecting rod with a limiting cap at the other end can be inserted into the hemispherical head of the connecting rod hemispherical head and can move relative to the hemispherical head of the connecting rod hemispherical head. The connecting rod hemispherical head is fixedly installed on one end of the frame fixing seat or is integrally formed with the frame fixing seat.

[0014] The angle between the sensing head and the frame fixing seat is determined by the relative angle between the single ball hoop connecting rod and the positioning ball on the back of the sensing head, and the relative angle between the connecting rod of the single ball hoop connecting rod and the frame fixing seat; the locking strength of the positioning ball on the back of the sensing head locked by the single ball hoop connecting rod is determined by the tightening degree of its own positioning bolts, and the locking strength of the hemispherical head of the connecting rod locking its own hemispherical head is determined by the tightening degree of its own positioning bolts; the positioning ball on the back of the sensing head is set away from the sensing area.

[0015] The distance between the induction head and the magnetic disk does not exceed 10 mm.

[0016] The distance between the induction head and the magnetic disk does not exceed 7 mm.

[0017] The sensing principle of the quick-release stepping sensor provided by the utility model is the same as that of the traditional stepping sensor: two Hall A and B are placed side by side on the sensing circuit board, and the distance between A and B is smaller than the width of the magnet and smaller than the distance between the magnets. When the magnet rotates forward and passes through Hall A and then Hall B, because the width of the magnet is greater than the distance between A and B, the output signal of B changes at this time and is the same as the output signal of A at that time. At this time, it is judged that the disk is rotating forward, and the sensing circuit board outputs a signal of forward rotation. On the contrary, when the magnet rotates in the opposite direction, the magnet passes through B first and then A. At this time, the output signal of Hall B changes. Because the magnet has not passed through Hall A, the output signal of A has not changed. Therefore, it is judged that the disk is not rotating forward, so the sensing circuit board does not output a signal.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1. Compared with the integrated pedal frequency sensor, the quick-release pedal frequency sensor of the utility model does not need to remove the bicycle middle axis and can be directly installed, which is more convenient and quick.

[0020] 2. Compared with the split-type pedal frequency sensor, the two plug-in semicircular disks of the quick-release pedal frequency sensor of the utility model are fixed by screws instead of iron hoops, which is more labor-saving and convenient during installation.

[0021] 3. Compared with other cadence sensors, the quick-release pedal sensor of the utility model is fixed on the bicycle crank through a connector, so it is not limited by the size of the middle axle, nor by the gap between the crank and the bottom bracket. It can be installed on more than 99% of bicycle types, has very good adaptability, and can be easily installed on hollow chainrings.

[0022] 4. Compared with other pedal frequency sensors, the quick-release pedal sensor of the utility model adopts a sensing magnet with a larger surface area and stronger magnetic force, so the sensing range and sensing distance are wider, making the installation more flexible and the sensing signal more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 A schematic diagram of the three-dimensional structure of the sensing head of the quick-release stepping sensor provided by the utility model;

[0024] Attached Figure 2 A schematic diagram of the planar structure of the sensing head portion of the quick-release stepping sensor provided by the utility model;

[0025] Attached Figure 3 A schematic diagram of the three-dimensional structure of the disk part of the quick-detachable stepping sensor provided by the utility model;

[0026] Attached Figure 4 A front structural schematic diagram of the magnetic disk portion of the quick-release stepping sensor provided by the utility model;

[0027] Attached Figure 5 A schematic diagram of the back structure of the magnetic disk portion of the quick-release stepping sensor provided by the utility model;

[0028] Attached Figure 6 This is a schematic diagram of the assembly structure of the quick-detachable pedal sensor provided by the utility model.

[0029] Among them: 10—sensor head; 11—sensing area; 12—display panel; 13—logo light; 14—magnetic sensor light; 15—sensor head connector; 16—single ball hoop connecting rod; 17—connecting rod hemispherical head; 18—frame fixing seat; 20—disk; 21—semicircle ring; 22—strong magnet; 23—disk connector; 24—double ball hoop swing arm; 25—crank fixing seat. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figure 1-6 As shown: a quick-release pedal sensor, including a sensing head 10 and a magnetic disk 20, the magnetic disk 20 is assembled from two semicircular rings 21 with a plug-in structure, the magnetic disk 20 is vertical to the bicycle center axis and suspended in the air and connected to a crank fixing seat 25 fixed on the bicycle crank through a magnetic disk connector 23; the sensing head 10 with a sensing area 11 is connected to a frame fixing seat 18 fixed on the bicycle bottom bracket side frame through a sensing head connector 15, the sensing head 10 is arranged parallel to the magnetic disk 20 and the sensing area 11 is located in the annular area formed by the strong magnet 22 on the magnetic disk 20. To ensure the performance, the spacing between the sensing head 10 and the magnetic disk 20 does not exceed 10 mm, and the preferred spacing does not exceed 7 mm.

[0032] On the basis of the above structure, 12 long strip-shaped strong magnets 22 are arranged radially and distributed in a circle on the magnetic disk 20. The strong magnets 22 are made of neodymium iron boron. Six long strip-shaped strong magnets 22 are arranged on each semicircular ring 21. A plug is provided on the back of one semicircular ring 21, and a corresponding socket is provided on the back of the other semicircular ring 21. The plug on the back of one semicircular ring 21 is inserted into the socket on the back of the other semicircular ring 21 and fixed with screws.

[0033] Furthermore, the disk connector 23 includes a positioning ball set on the back of the disk 20, a positioning ball set at one end of the crank fixing seat 25, and a double ball hoop swing arm 24. The two ends of the double ball hoop swing arm 24 can respectively embed and lock the positioning ball set on the back of the disk 20 and the positioning ball set at one end of the crank fixing seat 25. The locking strength of the positioning ball locked by the double ball hoop swing arm 24 is determined by the tightening degree of the positioning bolt; the angle between the disk 20 and the crank fixing seat 25 is adjusted by the relative position of the double ball hoop swing arm 24 and the two positioning heads.

[0034] Based on the above structure, the sensing head 10 includes a display panel 12 and the sensing area 11 is located at the dripping area of ​​the disc-shaped display panel 12. A logo light 13 and a magnet sensing light 14 are provided on the display panel 12. The logo light 13 is located at the center of the display panel 12. Magnet sensing lights 14 are arranged in a circular distribution on the surrounding side of the logo light 13, and the magnet sensing lights 14 correspond one-to-one to the strong magnets 22 on the disk 20.

[0035] Furthermore, the induction head connector 15 includes a positioning ball, a single ball hoop connecting rod 16, and a connecting rod hemispherical head 17 arranged on the back of the induction head 10. The hoop at one end of the single ball hoop connecting rod 16 is used to embed and lock the positioning ball arranged on the back of the induction head 10. The connecting rod of the single ball hoop connecting rod 16 with a limiting cap at the other end can be inserted into the hemispherical head of the connecting rod hemispherical head 17 and can move relative to the hemispherical head of the connecting rod hemispherical head 17. The connecting rod hemispherical head 17 is fixedly mounted on one end of the frame fixing seat 18 or is integrally formed with the frame fixing seat 18. When adjusting, The angle between the sensing head 10 and the frame fixing seat 18 is determined by the relative angle between the single ball hoop connecting rod 16 and the positioning ball on the back of the sensing head 10, and the relative angle between the connecting rod of the single ball hoop connecting rod 16 and the frame fixing seat 18; the locking strength of the positioning ball on the back of the sensing head 10 locked by the single ball hoop connecting rod 16 is determined by the tightening degree of its own positioning bolts, and the locking strength of the connecting rod hemispherical head 17 locking its own hemispherical head is determined by the tightening degree of its own positioning bolts; the positioning ball on the back of the sensing head 10 is set away from the sensing area 11. Example

[0036] A quick-release pedal sensor Figure 1-5As shown, the quick-release pedal sensor includes a sensing part and a disk part. The sensing part is composed of a sensing head 10, a single ball hoop connecting rod 16, a connecting rod hemispherical head 17, and a frame fixing seat 18. The disk part is composed of a disk 20 composed of two semicircular rings 21, a double ball hoop swing arm 24, and a crank fixing seat 25.

[0037] Specifically, a display panel 12 is provided on the front of the sensor head 10, and a sensing area 11 is provided at the drip-out portion of the display panel 12. The sensing area 11 should face the magnet area of ​​the disk 20. A breathing and flashing logo light 13 in the middle of the display panel 12 indicates the working status of the sensor head 10; a circle of 12 magnet sensing lights 14 are provided around the logo light 13, and when the 12 strong magnets 22 on the disk 20 rotate forward and pass through the sensing area 11, the 12 magnet sensing lights 14 will light up in sequence; the back side of the sensor head 10 is a sensor head connector 14 and a frame fixing seat 15, and the sensor head connector 15 includes a positioning ball, a single ball hoop connecting rod 16, and a connecting rod hemispherical head 17 provided on the back of the sensor head 10. The sensor head 10 and the frame fixing seat 18 are connected and fixed by two ball head structures. Such a design allows the frame fixing seat 18 of the sensing part to be fixed anywhere near the middle axis of the bicycle, such as any position or even any angle of the down tube, seat tube, and rear chain fork, which can be easily installed and ensure the position and orientation of the sensor head 10.

[0038] The disk 20 is composed of two semicircular rings 21 that can be inserted into each other. There are 12 long strong magnets 22 on the disk 20. The magnet area is very large. When installing the sensor head 10, just put the sensing area 11 into the magnet area. It is not necessary to align it very accurately like the old pedaling sensor. The strong magnet 22 made of neodymium iron boron has twice the magnetic force of the original one. The distance between the sensor head 10 and the disk 20 is 6-7mm and can be accurately sensed. The back side of the disk 20 is the disk connector 23 and the crank fixing seat 25. The disk 20 and the crank fixing seat 25 are also connected and fixed by two ball head structures. This design can easily adjust the angle of the disk 20. The disk 20 rotates one circle with the central axis, and the distance between the 12 strong magnets 22 and the sensor head 10 is consistent.

[0039] When installing the quick-release pedal sensor of the utility model, the process is as follows:

[0040] 1. Install the sensor head 10

[0041] Fix the frame fixing seat 18 to the frame near the bottom bracket with two cable ties. It can be fixed on the seat tube, down tube, or rear chain stay. Note that the cable ties should not be tightened too tightly at this time, and some adjustment margin should be reserved for later fine-tuning. Adjust the length and angle of the connecting rod of the single ball hoop connecting rod 16, and move the sensing area 11 of the sensor head 10 close to the bottom bracket. Use the provided tools to slightly tighten the screws of the two ball head structures. Note that they do not need to be tightened too tightly to facilitate later fine-tuning.

[0042] 2. Install the disk

[0043] Loosen the two screws on the back of the circular disk 20 and split it into two semicircular rings 21. Direct the magnet surfaces of the two semicircular rings 21 toward the frame and hang them around the five-way center axis. The two semicircular rings 21 are clamped into a ring and the two screws just loosened are tightened. Use three cable ties to fix the crank fixing seat 25 and the crank. Be careful not to tie it too tight and leave some adjustment margin for later fine-tuning. To adjust the angle of the disk 20, first tighten the screw of the ball head on the crank fixing seat 25, and then tighten the screw of the ball head on the back of the disk 20. Be careful not to tighten it too tight for later fine-tuning. Turn the crank to check the distance between the lower disk 20 and the sensor head 10 when it rotates, adjust the position and angle of the sensor head 10, so that the sensing area 11 of the sensor head 10 faces the magnet area of ​​the disk 20. Re-adjust the angle of the disk 20 through the screw of the ball head on the back of the disk 20, so that the disk 20 rotates one circle and the distance with the sensor head 10 is consistent.

[0044] 3. Lock

[0045] After the above adjustments are made, tighten the cable tie of the frame fixing seat 18, and tighten the screws on the single ball hoop connecting rod 16 and the connecting rod hemispherical head 17 to lock the corresponding ball heads; then tighten the cable tie of the crank fixing seat 25, and tighten the screws at both ends of the double ball hoop swing arm 24 to lock the corresponding ball heads; finally, cut off the exposed cable tie, and the installation is completed. The installed quick-release pedal sensor is as follows Figure 6 shown.

[0046] The new cadence sensor can be installed without removing the crank. It can be installed on more than 99% of bicycle types. It has very good adaptability and can also be easily installed on hollow chainrings.

[0047] When the quick-detachable pedal sensor of the utility model is used, the working process is as follows:

[0048] 1. Turn on the battery, and you can see that the logo light 13 in the middle of the sensor head 10 starts to flash, which indicates that the sensor head 10 is turned on; then you can see that the 12 magnetic sensor lights 14 around it start self-checking, rotating one circle clockwise and one circle counterclockwise to end the self-checking.

[0049] 2. Turn the crank and the disk 20 will rotate forward. It can be seen through the display panel 12 that when each strong magnet 22 on the disk 20 passes through the sensing area 11 on the sensing head 10, the magnet sensing light 14 on the sensing head 10 will rotate forward and light up. When the disk 20 rotates one circle, the magnet sensing light 14 will also light up one circle. If the crank is turned backward, the magnet sensing light 14 will not light up, indicating that the sensing head 10 recognizes the reversal, and the reversing crank will not drive the motor.

[0050] The above embodiments are only for illustrating the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the utility model; any technology not involved in the utility model can be realized by existing technology.

Claims

1. A quick-release stepping sensor, comprising a sensing head (10) and a magnetic disk (20), characterized in that: The magnetic disk (20) is assembled from two semicircular rings (21) with a plug-in structure. The magnetic disk (20) is vertical to the center axis of the bicycle and is suspended in the air. It is connected to a crank fixing seat (25) fixed on the crank of the bicycle through a magnetic disk connector (23). The induction head (10) with an induction area (11) is connected to a frame fixing seat (18) fixed on the bicycle five-way side frame through an induction head connector (15). The induction head (10) is arranged parallel to the magnetic disk (20) and the induction area (11) is located in a circular ring area formed by a strong magnet (22) on the magnetic disk (20).

2. The quick-release pedal sensor according to claim 1, characterized in that: The disk connector (23) comprises a positioning ball arranged on the back of the disk (20), a positioning ball arranged on one end of the crank fixing seat (25), and a double ball hoop swing arm (24), wherein the two ends of the double ball hoop swing arm (24) can respectively embed and lock the positioning ball arranged on the back of the disk (20) and the positioning ball arranged on one end of the crank fixing seat (25).

3. The quick-release pedal sensor according to claim 2, characterized in that: The angle between the magnetic disk (20) and the crank fixing seat (25) is adjusted by the relative position of the double ball hoop swing arm (24) and the two positioning heads; the locking strength of the positioning ball locked by the double ball hoop swing arm (24) is determined by the tightening degree of the positioning bolt.

4. The quick-release stepping sensor according to any one of claims 1 to 3, characterized in that: Twelve long strip-shaped strong magnets (22) arranged in a radial direction are arranged in a circumferential distribution on the magnetic disk (20); and six long strip-shaped strong magnets (22) are arranged on each semicircular ring (21).

5. The quick-release stepping sensor according to any one of claims 1 to 3, characterized in that: The strong magnet (22) is made of neodymium iron boron; a plug is provided on the back of one semicircular ring (21), and a corresponding socket is provided on the back of the other semicircular ring (21); the plug on the back of one semicircular ring (21) is inserted into the socket on the back of the other semicircular ring (21) and fixed with screws.

6. The quick-release stepping sensor according to claim 1, characterized in that: The induction head (10) comprises a display panel (12), a logo light (13) and a magnet induction light (14) are provided on the display panel (12), the logo light (13) is located at the center of the display panel (12), and magnet induction lights (14) are arranged in a circumferential distribution around the logo light (13), and the magnet induction lights (14) correspond one-to-one to the strong magnets (22) on the magnetic disk (20); the induction area (11) is located at the dripping area of ​​the disk-shaped display panel (12).

7. The quick-release stepping sensor according to claim 1 or 6, characterized in that: The induction head connector (15) comprises a positioning ball arranged on the back of the induction head (10), a single ball hoop connecting rod (16), and a connecting rod hemispherical head (17); the hoop at one end of the single ball hoop connecting rod (16) is used to embed and lock the positioning ball arranged on the back of the induction head (10); the connecting rod of the single ball hoop connecting rod (16) provided with a limiting cap at the other end can be inserted into the hemispherical head of the connecting rod hemispherical head (17) and can move relative to the hemispherical head of the connecting rod hemispherical head (17); the connecting rod hemispherical head (17) is fixedly mounted on one end of a vehicle frame fixing seat (18) or is integrally formed with the vehicle frame fixing seat (18).

8. The quick-release pedal sensor according to claim 7, characterized in that: The angle between the sensing head (10) and the frame fixing seat (18) is determined by the relative angle between the single ball hoop connecting rod (16) and the positioning ball on the back of the sensing head (10), and the relative angle between the connecting rod of the single ball hoop connecting rod (16) and the frame fixing seat (18); the locking strength of the positioning ball on the back of the sensing head (10) locked by the single ball hoop connecting rod (16) is determined by the tightening degree of its own positioning bolts, and the locking strength of the hemispherical head (17) of the connecting rod locking its own hemispherical head is determined by the tightening degree of its own positioning bolts; the positioning ball on the back of the sensing head (10) is arranged away from the sensing area (11).

9. The quick-release pedal sensor according to claim 1, characterized in that: The distance between the induction head (10) and the magnetic disk (20) does not exceed 10 mm.

10. The quick-release stepping sensor according to claim 9, characterized in that: The distance between the induction head (10) and the magnetic disk (20) does not exceed 7 mm.

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