TWM610071U - Pedaling force detection mechanism, drive device, hub device and power assisted bicycle - Google Patents

Abstract

Provided are pedaling force detection mechanism, drive device, hub device and power assisted bicycle. The pedaling force detection device includes a freehub rotatably disposed on a mounting shaft and having splines on the outer side thereof. A tension detection assembly is encapsulated inside the freehub and located between the freehub and the mounting shaft. When the freehub rotates, the tension detection assembly is configured to detect the tension from the chain driving the rotation of the freehub, wherein the mounting shaft is a shaft of a drive motor or a hub. In the solution provided in this utility model, the pedaling force detection device is installed to the drive motor at the rear hub in a detachable or integrated manner, so it is not necessary to provide detection devices and non-standard parts at bottom bracket, which leads to convenient assembly and cost reduction.

Description

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

This creation relates to the technical field of bicycle pedaling force detection, and particularly to the base of the hub gear tower base or the hub motor gear tower base of the assisted bicycle. Specifically, this creation relates to a pedaling force detection mechanism, a driving device, a hub device, and a power-assisted bicycle.

In an electric assisted bicycle, the pedaling force needs to be detected, and then the pedaling force parameter signal is transmitted 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 set at the bottom bracket position of the frame, and the pedaling force is collected through the pedaling torque, and most of them rely on special pedaling cranks and chainrings. This solution has a complex structure, inconvenient installation, and many non-standard accessories, so the cost is relatively high.

In order to overcome the shortcomings of the prior art, the present invention 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. Combination methods include detachable combination or direct integration, eliminating the need for detection devices and non-standard accessories on the five-way shaft, making it easier to install the vehicle and saving costs.

In one aspect of this creation, a pedaling force detection mechanism is provided. The pedaling force detection mechanism includes a ring gear base that can be sleeved on a mounting shaft and can rotate. The outer side of the ring gear base has spline teeth, and the Tension detection components are encapsulated in the chainring tower base. The tension detection component is located between the ring gear base and the mounting shaft. When the chainring tower base rotates, the tension detection component is used to detect the chain pulling force that drives the chainring tower base to rotate, and the pulling force comes from the pedaling force. Among them, the installation shaft is the shaft center of the drive motor or the hub.

In one aspect of this creation, a drive device is provided, which includes the pedal force detection mechanism as described above; a preset number of chainrings, which are combined with the chainring base and can be rotated by a chain; and a drive motor, It includes the mounting shaft.

In one aspect of this creation, a wheel hub device is provided, which includes the pedal force detection mechanism as described above: a preset number of chainrings, which are combined with the chainring base and can be driven to rotate by a chain; and the hub body , Which includes the mounting shaft.

In one aspect of this creation, a power-assisted bicycle is provided, which includes the pedaling force detection mechanism as described above; or the driving device as described above; or the hub device as described above; and a frame, wherein the pedaling force detecting mechanism, The driving device or the hub device is installed to the frame.

The pedal force detection mechanism, driving device, wheel hub device and power-assisted bicycle provided by this creation avoid the traditional idea of setting the pedal force detection device at the position of the bottom bracket shaft. The pedal force detection mechanism is placed on the rear wheel hub, using the chainring tower base as In the core, the chainring tower base is sleeved on the installation 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 force exerted by the chainring to obtain the magnitude of the pedaling force. The entire pedal 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 a drive motor and a preset number of chainrings. Combination methods include detachable combination or direct integration with the drive motor to obtain an integrated drive device, so that the drive motor part and the pedal force detection part are integrated, which is convenient for overall replacement of the drive motor or maintenance. Similarly, the pedal force detection mechanism can also be combined with the hub body and a preset number of chainrings. Combination methods include detachable combination or directly integrated integration with the hub body to obtain a hub device, which is convenient for integral replacement of the hub or maintenance, and is especially suitable for other power-assisted models with a drive motor located outside the rear hub. Furthermore, the integration of a pedal force detection mechanism, or a power-assisted bicycle with a drive device, or a wheel hub device. Compared with traditional power-assisted bicycles, the pedal force detection mechanism is more integrated, has a simpler structure, reduces non-standard accessories, and reduces production costs. .

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

Referring to FIGS. 1 to 10, a pedaling force detection mechanism 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 110 has spline teeth 210. A tension detection assembly 300 is encapsulated in the chainring base 110, and the tension detection assembly 300 is located between the chainring base 110 and the mounting shaft 100. After the chain drive base 110 rotates, the tension detection assembly 300 is used to detect the chain pulling force that drives the chain drive base 110 to rotate, and the pulling force comes from the pedaling force. Among them, the mounting shaft 100 serves as the shaft center of the driving motor 10 or the hub body 20.

Among them, the tension detection assembly 300 includes a mounting member 310 sleeved on the mounting shaft 100. A mounting portion 311 is provided on the surface of the mounting member 310 that is in contact with the mounting shaft 100. The mounting portion 311 is provided with a sensing element 320. The sensing element 320 is electrically connected to the processing chip circuit board 330 placed in the sprocket base 110. For example, the sensing element 320 may be a deformation sensing element or a force sensing element, but is not limited thereto.

The mounting member 310 is sleeved on the mounting shaft 100 and connected to the mounting shaft 100 in a fixed manner. It has certain elasticity and strength, and can be made of alloy metal. Preferably, the mounting member 310 is ring-shaped. Since the mounting shaft 100 is cylindrical, by setting the mounting member 310 in a ring shape, the connection between the mounting shaft 100 and the mounting member 310 is made closer.

The sensing element 320 can be fixed on the mounting member 310 and attached to the mounting member 310. At the same time, the sensing element 320 is connected to the processing chip circuit board 330 placed in the sprocket base 110. In the case of using a deformation sensing element as the sensing element 320, when the sprocket 200 is under tension, the sprocket 200 pushes the sensing element 320, so that the sensing element 320 is deformed, and the processing is connected with the sensing element 320 The chip circuit board 330 can detect the exact amount of deformation of the sensing element 320 to obtain the pedaling force. In addition, in the case of using a force sensing element as the sensing element 320, when the sprocket 200 is under tension, the sprocket 200 pushes the sensing element 320, and the processing wafer circuit board 330 connected to the sensing element 320 may be based on The force sensed by the sensing element 320 is used to obtain the pedaling force.

Preferably, a mounting portion 311 is provided on the surface of the mounting member 310 that is in contact with the mounting shaft 100. The mounting portion 311 is used to place the sensing element 320. The mounting portion 311 can be configured as a groove, so that the sensing element 320 can be placed in the groove.

The processing chip circuit board 330 is a printed circuit board assembly (PCBA). The processing chip on the processing chip circuit board 330 specifically includes, but is not limited to, single chip microcomputers, ARM (Advanced RISC Machine), FPGA (Field Programmable Gate Array, Field Programmable Gate Array) and other control elements.

In the aforementioned pedaling force detection mechanism, when the user steps on the pedal to drive the chain to move, the chain will generate tension, thereby exerting a force on the chainring 200, and the tension generated by the chain is proportional to the force exerted by the chain on the chainring 200. At the same time, the tension generated by the chain is proportional to the pedaling force exerted by the user on the pedal. In this way, since the spline teeth of the chainring 200 and the chainring base 110 are tightly clamped together, the tension detection assembly 300 detects the force received by the chainring 200 to obtain the stepping force. Specifically, when the sprocket 200 receives a force, the sprocket 200 pushes the tension detection assembly 300, and because the inside of the tension detection assembly 300 is still supported by the mounting shaft 100, the two forces cause the tension detection assembly 300 to deform. So as to obtain the tension of the chain. In addition, the aforementioned pedaling force detection mechanism is highly integrated and is arranged between the mounting shaft 100 of the drive motor 10 and the gear plate 200. Therefore, it is only necessary to install the motor when loading the vehicle, and there is no need to install other pedaling force sensors. The car is more convenient.

It should be noted that the above gear plate 200 is rotatably sleeved on the mounting shaft 100, and the tension detection assembly 300 is fixed on the mounting shaft 100. When the chain drives the chainring 200 to rotate, the tension detection assembly 300 and the mounting shaft 100 remain stationary, and the force-receiving part of the chainring 200 is in contact with the chain, and the force-receiving part may be the part of the chainring 200 that receives the greatest force. As shown in Figure 9, when the chainring 200 rotates, the force-receiving part of the chainring 200 is always the leftmost part of the chainring 200, and the direction of the maximum force applied by the chain to the chainring 200 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 100. The sleeve 500 is disposed between the tension detection assembly 300 and the mounting shaft 100 and is used to support the tension detection assembly 300.

Further, a preset number of pawls 111 are provided at one end of the chainring base 110. The pawls 111 can be engaged with the hub motor or hub drive in a snap-fit manner, and the number of pawls 111 is not limited to the three shown in FIG. 5, and can be appropriately increased according to actual conditions. Through the pawl 111, the gear plate tower base 110 can be quickly installed on the installation shaft, and has the function of a one-way device, so it does not need to be locked to the thread, and it is easy to install.

Further, in an embodiment, the pedaling force detection mechanism further includes a nut 340 matching the size of the chainring base 110. The nut 340 is used to fix the chain drive base 110 on the mounting shaft 100 to prevent the chain drive base 110 from loosening during riding.

Further, in an embodiment, as shown in FIG. 9, a support bearing 400 is provided between the inner wall of the ring gear base 110 and the tension detection assembly 300. Specifically, the support bearing 400 is sleeved on the tension detection assembly 300. The gear plate 200 is sleeved on the support bearing 400 through the spline teeth 210, and the support bearing 400 is used to support the gear plate. Among them, the spline teeth 210 are connected to the main body of the hub body 20 through a ratchet mechanism (the ratchet mechanism is not shown in the figure). The main body of the driving motor 10 or the hub body 20 is used to support the bicycle wheel frame and tires. Only when the pedal is stepped forward, the gear wheel 200 can drive the driving motor 10 or the main body of the hub body 20 to rotate through the ratchet mechanism. The mounting shaft 100 is connected to the main body of the driving motor 10 or the hub body 20 through a bearing. When the main body of the driving motor 10 or the body of the hub 20 rotates, the mounting shaft 100 is always kept 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 200, such as 1-10 chainrings 200, The chainring 200 can be combined with the chainring tower base 110 in a fixed or split combination, and can be driven to rotate by a chain. The driving device also includes a driving motor 10. The drive motor 10 integrates the mounting shaft 100.

In this embodiment, the pedaling force detection mechanism and the driving motor 10 are integrated into one body, so that the overall disassembly and maintenance are facilitated, the loading efficiency is improved, and the loading cost is reduced.

Further, in an 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. The hub device includes a pedal force detection mechanism and also includes a preset number of gear plates 200, such as 1-10 gear plates 200. The gear plate 200 can be combined with the gear plate base 110 in a fixed or split combination manner. , And can be driven by a chain to rotate. The hub device also includes a hub body 20. The hub body 20 integrates the mounting shaft 100.

In this embodiment, a pedaling force detection mechanism is integrated on the hub body 20, that is, the hub equipped with the pedaling force detection mechanism is the rear hub, and the pedaling force is detected through the pulling of the chain, and the front hub or other positions are equipped with a drive motor, so it is suitable for Other power-assisted models such as front-mounted and mid-mounted drive motors are convenient for users to choose, and at the same time improve the efficiency of loading and reduce loading costs.

Further, in one embodiment, it also relates to a power-assisted bicycle. Fig. 11 shows a schematic structural diagram of a power-assisted bicycle. The power-assisted bicycle 30 includes the pedaling force detection mechanism as described above, or the driving device as described above, or the hub device as described above; and a frame 31, wherein the pedaling force detecting mechanism and the driving device The device or hub device (indicated by D in FIG. 11) is installed to the frame 31. That is, in the assisted bicycle, the pedal force detection mechanism can be placed on the rear wheel hub, or a drive device integrated with the pedal force detection mechanism or a hub device integrated with the pedal force detection mechanism can be provided for users to choose from, and both There is no need to install other pedal force sensors, so non-standard accessories can be reduced, cost saving, and easy installation and maintenance.

The above is an explanation of the pedal force detection mechanism of this creation to help understand this creation, but the implementation of this creation is not limited by the above-mentioned embodiments, and any changes, modifications, substitutions, combinations, and combinations made without departing from the principles of this creation Simplification should be equivalent replacement methods, and they are all included in the scope of protection of this creation.

10: Drive motor 20: Hub body 30: power-assisted bicycle 31: Frame 100: Install shaft 110: Sprocket base 111: Pawl 200: chainring 210: Spline tooth 300: Tension detection component 310: Mounting parts 311: Installation Department 320: sensing element 330: Handling chip circuit boards 340: Nut 400: Support bearing 500: sleeve

Figure 1 is an outline drawing of the chainring base in an embodiment of the creation;

Figure 2 is an outline drawing of the tension detection component in an embodiment of the creation;

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

Figure 4 is a side exploded view of the tension detection component in one embodiment of the creation;

Figure 5 is a cross-sectional view of the structure of the chainring tower base in an embodiment of the creation;

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

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

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

Figure 9 is a partial side view of the driving device in one embodiment of the creation;

Figure 10 is a structural diagram of the hub device in one embodiment of the creation;

Figure 11 is a schematic diagram of the structure of the assisted bicycle in an embodiment of the creation.

110: Sprocket base

111: Pawl

210: Spline tooth

Claims (10)

A pedaling force detection mechanism, including: The chainring tower base is sleeved on the mounting shaft and can be rotated on the mounting shaft. The outer side of the chainring tower base has spline teeth. The chainring tower base is encapsulated with a tension detection assembly. The tension detection assembly Located between the chainring tower base and the mounting shaft, After the ring gear base rotates, the tension detection assembly is used to detect the pulling force of the chain that drives the ring gear base to rotate. The pulling force comes from the pedaling force, and the mounting shaft is the axis of the drive motor or the hub. For example, the pedal force detection mechanism of claim 1, wherein the tension detection assembly includes a mounting member sleeved on the mounting shaft, and a mounting portion is provided on the surface of the mounting member in contact with the mounting shaft, and the mounting portion is provided with a sense of deformation A sensing element or a force sensing element, the deformation sensing element or the force sensing element is electrically connected with the processing chip circuit board placed in the turret base of the chainring. For example, the pedal force detection mechanism of 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. For example, the pedaling force detection mechanism of claim 3, wherein the mounting member is ring-shaped. For example, the pedaling force detection mechanism of claim 1, wherein a preset number of pawls are provided at one end of the ring gear base, and the pawls are used for engaging with the wheel drum motor or the hub drive. For example, the stepping force detection mechanism of claim 1, wherein the stepping force detection mechanism further includes a nut matching the size of the chainring base, and the nut is used to fix the chainring base on the mounting shaft. The stepping 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 base and the tension detection assembly. A driving device includes: Such as the pedaling force detection agency of any one of claims 1 to 7; A preset number of chainrings, which are combined with the chainring base and can be driven by a chain to rotate; and The drive motor includes the mounting shaft. A wheel hub device includes: Such as the pedaling force detection agency of any one of claims 1 to 7; A preset number of chainrings, which are combined with the chainring base and can be driven by a chain to rotate; and The hub body includes the mounting shaft. A power-assisted bicycle, including: Such as the pedaling force detection mechanism of any one of claims 1 to 7; or the driving device of claim 8; or the wheel hub device of claim 9; and A vehicle frame, wherein the pedaling force detection mechanism, the driving device, or the wheel hub device is installed to the vehicle frame.

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