WO2021136524A1

WO2021136524A1 - Pedaling force detection mechanism, driving device, hub device and power-assisted bicycle

Info

Publication number: WO2021136524A1
Application number: PCT/CN2020/142291
Authority: WO
Inventors: 许源芳
Original assignee: 许源芳
Priority date: 2019-12-31
Filing date: 2020-12-31
Publication date: 2021-07-08
Also published as: CN211494371U; TWM610071U

Abstract

Provided are a pedaling force detection mechanism, a driving device, a hub device and a power-assisted bicycle. The pedaling force detection mechanism comprises a toothed disc tower base (110) which can sheathe a mounting shaft (100) and can rotate, wherein spline teeth (210) are arranged on the outer side of the toothed disc tower base (110), a tension detection assembly (300) is packaged in the toothed disc tower base (110), and the tension detection assembly (300) is positioned between the toothed disc tower base (110) and the mounting shaft (100); and after the toothed disc tower base (110) rotates, the tension detection assembly (300) is used for detecting the chain tension driving the toothed disc tower base (110) to rotate, wherein the tension is derived from the stepping force, and the mounting shaft (100) is an axis of a driving electric motor (10) or a hub. According to the technical solution, the pedaling force detection device is arranged at the position of a rear hub and can be disassembled and combined or directly combined with the driving electric motor (10) into a whole, so that a detection device and non-standard fittings on a five-way shaft are omitted, bicycle assembly is more convenient, and costs are saved.

Description

Pedal force detection mechanism, driving device, wheel hub device and power-assisted bicycle

Technical field

The utility model relates to the technical field of bicycle pedaling force detection, and is particularly designated for a hub gear plate tower base or a hub motor gear plate tower base of a power-assisted bicycle, and relates to a pedal force detection mechanism, a driving device, a hub device and a power-assisted bicycle.

Background technique

In an electric assisted bicycle, it is necessary to detect the pedaling force, and then transmit the pedaling force parameter signal to the motor drive circuit, so that the motor outputs a corresponding ratio of torque or power output. In traditional electric bicycles, the sensors used to detect the pedaling force are generally installed at the bottom bracket position of the frame, and the pedaling force is collected through the pedaling torque, and it mostly relies on special pedaling cranks and chainrings. The structure of this solution is complicated. Installation is inconvenient; there are many non-standard accessories and the cost is high.

Utility model content

In order to overcome the shortcomings of the prior art, the utility model provides a pedaling force detection mechanism, a driving device, a hub device and a booster bicycle. The pedaling force detection device is arranged at the position of the rear wheel hub and can be combined with the driving motor or the hub body; Including detachable combination or direct integration, saving the detection device and non-standard accessories in the five-way shaft, making the loading more convenient and saving costs.

A pedaling force detection mechanism, characterized in that the pedaling force detection mechanism includes a ring gear base that can be sleeved on a mounting shaft and can rotate, and the outer side of the ring gear base is provided with spline teeth; A tension detection assembly is encapsulated in the base, and the tension detection assembly is located between the sprocket tower base and the mounting shaft; when the sprocket tower base rotates, the tension detection assembly is used to detect driving the teeth The pulling force of the chain when the tray base rotates, the pulling force comes from the pedaling force, and the mounting shaft is the axis of the drive motor or the hub.

A driving device, characterized in that it comprises the pedaling force detection mechanism as described above; a preset number of chainrings, the chainrings are combined with the chainring tower base, and can be driven to rotate by a chain; a driving motor, the drive The motor includes the mounting shaft.

A wheel hub device, characterized in that it comprises the pedal force detection mechanism as described above: a preset number of toothed discs, the toothed discs are combined with the toothed disc tower base and can be driven to rotate by a chain; the hub body, the hub The body includes the mounting shaft.

A power-assisted bicycle, which is characterized by comprising the pedal force detection mechanism as described above; or the driving device as described above; or the hub device as described above.

The pedal force detection mechanism, the driving device, the hub device and the assisted bicycle provided by the utility model avoid the traditional idea of arranging the pedal force detection device at the position of the five-way shaft, and the pedal force detection mechanism is placed on the rear wheel hub; As the core, the chainring tower base is sleeved on the mounting shaft, and the tension detection component for detecting the pedal force is placed in the chainring tower base, and the chainring tower base can be equipped with a universal size chainring, and the chainring is in contact with the chain When the user steps on, the tension generated by the chain is transmitted to the chainring base through the chainring, and the tension detection component in the chainring base detects the pressure on the chainring to obtain the pedaling force. The entire pedaling force detection mechanism is highly integrated, requires fewer components, is convenient to install, and is easy to maintain.

The pedal force detection mechanism can also be combined with the drive motor and a preset number of chainrings. The combination methods include detachable combination or directly integrated with the drive motor to obtain an integrated drive device, so that the drive motor part and the pedal force detection part are combined. As a whole, it is convenient to replace the drive motor or maintain the whole; similarly, the pedal force detection mechanism can also be combined with the hub body and a preset number of gear discs. The combination methods include detachable combination or directly integrated with the hub body to obtain a hub device , It is convenient to replace the hub or maintain it as a whole, especially suitable for other power-assisted models with the drive motor set outside the rear hub; and the power-assisted bicycle with integrated pedal force detection mechanism, or with a drive device, or with a hub device, compared with traditional power-assisted bicycles , The stepping force detection mechanism is more integrated, the structure is simpler, non-standard accessories are reduced, and the production cost is reduced.

Description of the drawings

Figure 1 is an outline view of the chainring tower base in an embodiment of the utility model;

Figure 2 is an outline view of a tension detection component in an embodiment of the utility model;

Figure 3 is an exploded view of the internal structure of the chainring tower base in an embodiment of the utility model;

Figure 4 is a side exploded view of the tension detection component in an embodiment of the utility model;

Figure 5 is a cross-sectional view of the structure of the ring tower base in an embodiment of the utility model;

Figure 6 is an exploded view of the structure of the driving device in an embodiment of the utility model;

Figure 7 is an assembly diagram of the driving device in an embodiment of the utility model;

Figure 8 is a partial enlarged view of the driving device in an embodiment of the utility model;

Figure 9 is a partial side view of the driving device in an embodiment of the utility model;

Figure 10 is a structural diagram of the hub device in an embodiment of the utility model;

Description of reference signs:

10. Drive motor; 20, hub body; 100, mounting shaft; 110, gear plate tower base; 111, pawl; 200, gear plate; 210, spline teeth; 300, tension detection assembly; 310, mounting parts; 311 , Mounting part; 320, strain gauge; 330, processing chip circuit board; 340, nut; 400, support bearing; 500, sleeve.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present utility model, and are not used to limit the present utility model.

A pedaling force detection mechanism, see Figures 1 to 10, includes a ring gear base (110) that can be sleeved on a mounting shaft and can rotate, and the outer side of the ring gear base has spline teeth (210); the ring tower The base is encapsulated with a tension detection component (300), which is located between the chainring tower base and the mounting shaft; when the chainring tower base rotates, the tension detection assembly is used to detect the chain tension that drives the chainring tower base to rotate. It comes from pedaling force, wherein the mounting shaft (100) is used as the shaft center of the driving motor (10) or the hub body (20).

Among them, the tension detection assembly includes a mounting part (310) sleeved on the mounting shaft, a mounting part (311) is provided on the surface of the mounting part in contact with the mounting shaft, a strain gauge (320) is provided on the mounting part, and the strain gauge and The processing chip circuit board (330) placed in the base of the chainring is electrically connected.

The mounting part is sleeved on the mounting shaft and is fixedly connected to the mounting shaft. It has certain elasticity and strength, and can be made of alloy metal; preferably, the mounting part is ring-shaped. Since the mounting shaft is cylindrical, the connection between the mounting shaft and the mounting member is made closer by setting the mounting member in a ring shape.

The strain gauge can be fixed on the mounting part and attached to the mounting part. At the same time, the strain gauge is connected to the circuit board of the processing chip placed in the base of the sprocket. In this way, when the sprocket is under tension, the sprocket pushes the strain gage , So that the strain gauge is deformed, and the processing chip circuit board connected with the strain gauge can detect the accurate deformation of the strain gauge, and then obtain the pedaling force.

Preferably, a mounting part is provided on the surface of the mounting member that is in contact with the mounting shaft, and the mounting part is used for placing the strain gauge. The mounting part can be set in a groove shape to facilitate the placement of the strain gauge in the groove.

The processing chip circuit board, namely PCBA; the processing chip on the processing chip circuit board, including but not limited to single-chip microcomputer, ARM (Advanced RISC Machine: high-end reduced instruction set machine) and FPGA (Field-Programmable Gate Array: Field Programmable Gate Array) ) And other control components.

In the above-mentioned pedaling force detection mechanism, when the user steps on the pedal to drive the chain to move, the chain will generate tension, thereby exerting pressure on the chainring, and the tension generated by the chain is proportional to the pressure exerted by the chain on the chainring. At the same time, the chain generates tension. The tension is proportional to the pedaling force exerted by the user on the pedal. In this way, since the spline teeth of the chainring and the sprocket base are tightly clamped together, the tension detection component detects the pressure of the chainring to obtain the pedaling force. Specifically, when the chainring is under pressure, the chainring pushes the tension detection assembly, and since the inside of the tension detection assembly is still supported by the mounting shaft, the two forces deform the tension detection assembly to obtain the tension of the chain. In addition, the above-mentioned pedal force detection mechanism is highly integrated and is arranged between the mounting shaft of the drive motor and the gear plate. When loading the vehicle, the motor only needs to be installed, and there is no need to install other pedal force sensors, which is convenient for loading.

It should be noted that the above chainring is rotatably sleeved on the mounting shaft, and the tension detection component is fixed on the mounting shaft. When the chain drives the chainring to rotate, the tension detection component and the mounting shaft remain stationary, and the tension detection component and the mounting shaft remain stationary. The force part is in contact with the chain, and the stressed part can be the part of the chainring that receives the greatest pressure. As shown in Figure 9, when the chainring rotates, the stressed part of the chainring is always the leftmost part of the chainring. The direction of the maximum pressure applied by the chain to the chainring is the M direction (assuming the forward direction is along the M direction).

Further, in an embodiment, the pedaling force detection mechanism further includes a sleeve (500) sleeved on the mounting shaft, and the sleeve is arranged between the tension detection component and the installation shaft for supporting the tension detection component.

Further, a preset number of pawls (111) are provided at one end of the chainring tower base, and the pawls can be connected to the drum motor or the hub transmission in a card manner, and the number of pawls is not limited to the three shown in FIG. 5 , Can also be appropriately increased according to the actual situation. Through the pawl, the gear plate tower base can be quickly installed on the installation shaft, and has the function of a one-way device, so that it does not need to lock the teeth and is convenient for installation.

Further, in an embodiment, the pedaling force detection mechanism further includes a nut (340) matching the size of the chain drive base. The nut is used to fix the chain drive base on the mounting shaft to avoid the tower during riding. Kisson off.

Further, in an embodiment, as shown in Fig. 9, a support bearing (400) is provided between the inner wall of the ring gear base and the tension detection assembly. Specifically, the support bearing is sleeved on the tension detection assembly, the gear plate is sleeved on the support bearing through spline teeth, and the support bearing is used to support the gear plate. Among them, the spline teeth and the main body of the hub body are connected by a ratchet mechanism (the ratchet mechanism is not shown in the figure). The drive motor or the main body of the hub body is used to support the bicycle wheel frame and the tire. The ratchet mechanism drives the main body of the driving motor or the hub body to rotate, and the mounting shaft is connected with the main body of the driving motor or the hub body through a bearing. When the main body of the driving motor or the hub body rotates, the mounting shaft remains in a non-rotating state.

Further, in an embodiment, a driving device is included, as shown in Figs. 6-9, on the basis of including a pedaling force detection mechanism, it also includes a preset number of chainrings, such as 1-10 chainrings. The disc can be combined with the gear plate tower base in a fixed or split combination, and can be driven by a chain to rotate; the drive motor, the drive motor is integrated with the installation shaft.

In this embodiment, the pedal force detection mechanism is integrated with the drive motor, which is convenient for overall disassembly and maintenance, improves the efficiency of loading, and reduces the cost of loading.

Further, in one embodiment, a hub device is included, as shown in FIG. 10, and the details of the area B shown in FIG. 8 are the same as those shown in FIG. 8, and will not be repeated here. In addition to the pedal force detection mechanism, it also includes a preset number of chainrings, such as 1-10 chainrings. The chainring can be combined with the chainring base in a fixed or split combination, and can be driven by a chain to rotate; hub The body, the hub body integrates the mounting shaft.

In this embodiment, the pedaling force detection mechanism is integrated on the hub body, that is, the hub equipped with the pedaling force detection mechanism is the rear hub, and the pedaling force is detected by pulling the chain. The front hub or other positions are equipped with a driving motor, which is suitable for driving the front of the motor. Other power-assisted models such as, mid-mounted, etc., are convenient for users to choose, while also improving loading efficiency and reducing loading costs.

Further, in one embodiment, it also relates to a power-assisted bicycle, including the pedal force detection mechanism as described above; or the driving device as described above; or the hub device as described above. That is, the pedal force detection mechanism is placed on the rear wheel hub. At the same time, it is equipped with a drive device integrated with a pedal force detection mechanism or a hub device integrated with a pedal force detection mechanism for users to choose from, and there is no need to install additional pedal force sensors, reducing Non-standard accessories, cost saving, and easy to install and maintain.

The above is an explanation of the pedal force detection mechanism of the present utility model to help understand the present utility model, but the implementation of the utility model is not limited by the above-mentioned examples, and any changes, modifications, and modifications made without departing from the principles of the present utility model Substitution, combination, and simplification should all be equivalent replacement methods, and they are all included in the scope of protection of the present invention.

Claims

A pedaling force detection mechanism, characterized in that the pedaling force detection mechanism includes a ring gear base that can be sleeved on a mounting shaft and can rotate, and the outer side of the ring gear base is provided with spline teeth; A tension detection assembly is encapsulated in the base, and the tension detection assembly is located between the sprocket tower base and the mounting shaft; when the sprocket tower base rotates, the tension detection assembly is used to detect driving the teeth The pulling force of the chain when the tray base rotates, the pulling force comes from the pedaling force, and the mounting shaft is the axis of the drive motor or the hub.
The pedaling force detection mechanism according to claim 1, wherein the tension detection assembly includes a mounting member sleeved on the mounting shaft, and a mounting portion is provided on a surface of the mounting member in contact with the mounting shaft A strain gauge is arranged on the mounting part, and the strain gauge is electrically connected with the circuit board of the processing chip placed in the sprocket tower base.
The pedaling force detection mechanism according to claim 2, wherein a sleeve is provided on the inner side of the mounting member, and the sleeve is sleeved on the mounting shaft and is interposed between the mounting shaft and the mounting member. between.
The pedaling force detection mechanism according to claim 3, wherein the mounting member is ring-shaped.
The pedaling force detection mechanism according to claim 1, wherein a predetermined number of pawls are provided at one end of the sprocket base, and the pawls can be connected to the wheel drum motor or the hub drive in a card manner.
The stepping force detection mechanism according to claim 1, wherein the stepping force detection mechanism further comprises a nut matching the size of the sprocket base, and the nut is used to fix the sprocket base to The mounting shaft.
The pedaling force detection mechanism according to any one of claims 1 to 6, wherein a support bearing is provided between the inner wall of the sprocket tower base and the tension detection assembly.
A drive device, characterized by comprising the pedal force detection mechanism according to any one of claims 1 to 7; a preset number of chainrings, the chainrings are combined with the chainring tower base, and can be driven by a chain Rotation; a drive motor, the drive motor includes the mounting shaft.
A wheel hub device, characterized by comprising the pedaling force detection mechanism according to any one of claims 1 to 7: a preset number of toothed disks, the toothed disks are combined with the toothed disk base and can be driven by a chain Rotating; a hub body, the hub body including the mounting shaft.
A power-assisted bicycle, characterized by comprising the pedaling force detection mechanism according to any one of claims 1 to 7; or the driving device according to claim 8; or the hub device according to claim 9.