Front wheel speed measurement hub

Abstract

The utility model discloses a front wheel speed measurement hub which comprises a hub shell, one end of the hub shell is in threaded connection with a hub end cover, a mandrel is transversely arranged on the hub shell and the hub end cover, and bearing structures are arranged between the mandrel and the hub shell and between the mandrel and the hub end cover. A mounting seat fixed on the mandrel is arranged in the hub shell, a Hall plate is arranged on the mounting seat, and a Hall element is arranged on the Hall plate; a magnetic ring matched with the Hall element is arranged on the hub shell; a wire passing groove communicated with the inside and the outside of the hub shell is formed in the mandrel, a cable is arranged in the wire passing groove, one end of the cable is connected with the Hall plate, and a cable clamping groove for bending and clamping the cable is formed in the edge of the mounting base. Enough space is reserved in the hub for placing the Hall element and the magnetic ring, and the rotation condition of the hub shell is monitored through matched use of the Hall element and the magnetic ring; and meanwhile, the mandrel and the mounting seat are improved, so that the cable routing distribution is more reasonable, and the influence of cable routing on the operation of the hub is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of power-assisted bicycle accessories and relates to a front-wheel speed-measuring hub. Background Art

[0002] In a power-assisted bicycle, the hub is a key component connecting the wheel rim and the frame, ensuring that the front wheel can be firmly installed on the frame and withstand various forces and impacts during vehicle travel.

[0003] Currently, there are certain limitations in the structural design of the front-wheel hub of power-assisted bicycles. The existing front-wheel hub of power-assisted bicycles only configures a bearing structure inside, and its main purpose is to ensure that the front wheel can rotate smoothly without obstruction, thereby reducing frictional resistance and maximizing the riding efficiency.

[0004] However, this simple bearing structure brings a lack of function. Due to the limitations of its internal space and structure, it is impossible to install a speed-measuring device inside to monitor the rotational speed of the front wheel in real time. This causes many inconveniences in actual riding applications.

[0005] For example, in some scenarios that require precise speed control, such as long-distance cycling races or specific training requirements, it is difficult to accurately control and adjust the riding speed without accurately knowing the rotational speed of the front wheel. Moreover, for some users who pursue an intelligent riding experience, without being able to monitor the rotational speed of the front wheel, they cannot obtain comprehensive riding data and it is difficult to scientifically analyze and optimize their own riding status and performance.

[0006] Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Content of the Utility Model

[0007] The purpose of the utility model is to provide a front-wheel speed-measuring hub, which can better monitor the rotational speed of the front wheel through the improvement of the hub structure.

[0008] The purpose of the utility model is realized through the following technical solutions:

[0009] A front-wheel speed-measuring hub includes a hub shell. One end of the hub shell is threadedly connected with a hub end cap. A mandrel is horizontally arranged on the hub shell and the hub end cap. A bearing structure is arranged between the mandrel and the hub shell and the hub end cap. An installation seat fixed on the mandrel is arranged inside the hub shell. A Hall plate is arranged on the installation seat. Hall elements are arranged on the Hall plate. A magnetic ring matching with the Hall elements is arranged on the hub shell. A wire groove communicating inside and outside the hub shell is arranged on the mandrel. A cable is arranged in the wire groove. One end of the cable is connected with the Hall plate. A cable slot for bending and clamping the cable is arranged at the edge of the installation seat.

[0010] As a further improvement of an embodiment of the present utility model, at the other end of the hub shell, a first clamping groove for clamping the first bearing is provided. A first pressing member is arranged outside the first bearing, and the edge of the first pressing member is clamped into the first clamping groove; a nut is threadedly connected to the spindle, and one side of the nut abuts against the outside of the first pressing member.

[0011] As a further improvement of an embodiment of the present utility model, a first protrusion is provided on the spindle. The first protrusion has a vertical side wall, and one side of the first bearing abuts against the vertical side wall.

[0012] As a further improvement of an embodiment of the present utility model, a second clamping groove for clamping the second bearing is provided on the hub end cover. A second pressing member is arranged outside the second bearing. Both the second bearing and the second pressing member are arranged on the first step of the spindle, and the edge of the second pressing member is clamped into the second clamping groove.

[0013] As a further improvement of an embodiment of the present utility model, a second protrusion is provided on the spindle. The second protrusion abuts against one side of the first step, and one side of the second bearing abuts against the side wall of the second protrusion.

[0014] As a further improvement of an embodiment of the present utility model, a plurality of positioning holes are circumferentially arranged on the outer surface of the hub end cover, and the adjacent positioning holes are equally spaced.

[0015] As a further improvement of an embodiment of the present utility model, the bottom of the mounting seat is of a semi-circular structure and is adapted to the outer surface of the spindle. The mounting seat is locked to the spindle by bolts.

[0016] As a further improvement of an embodiment of the present utility model, one end of the wire groove is located on the first step and forms an arc-shaped clamping groove on the first step. The arc-shaped clamping groove is located outside the second bearing; the other end of the wire groove is located at the junction of the second protrusion and the spindle body.

[0017] Adopting the above technical solutions, the following beneficial effects are achieved: Sufficient space is reserved inside the hub for placing the Hall element and the magnetic ring, and the Hall element and the magnetic ring are used in combination to monitor the rotation of the hub shell; at the same time, the spindle and the mounting seat are improved to make the wire routing more reasonable and stable, and avoid the influence of wire routing on the operation of the hub. Description of the Drawings

[0018] To more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained by extending based on the provided drawings.

[0019] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present utility model.

[0020] Figure 1 It is a three-dimensional structure schematic diagram provided by the present utility model.

[0021] Figure 2 It is a front view structure schematic diagram provided by the present utility model.

[0022] Figure 3 For Figure 2 the cross-sectional view along the A-A direction in

[0023] Figure 4 It is a three-dimensional structure schematic diagram (hiding the hub shell) provided by the present utility model.

[0024] Figure 5 It is a structure schematic diagram of the first state of the spindle provided by the present utility model.

[0025] Figure 6 It is a cross-sectional structure schematic diagram of the spindle provided by the present utility model.

[0026] Figure 7 It is a combined structure schematic diagram of the cable, Hall plate, and mounting seat provided by the present utility model.

[0027] In the figure:

[0028] 1 - Hub shell;

[0029] 2 - Hub end cap; 21 - Positioning hole;

[0030] 3 - Spindle; 31 - Wire groove; 311 - Arc-shaped card slot; 312 - Opening; 32 - Spindle body; 33, 34 - External thread structure; 35 - First protrusion; 36 - Third protrusion; 37 - Second protrusion;

[0031] 4 - Mounting seat; 41 - Semi-circular structure; 42 - Cable card slot;

[0032] 5 - Hall plate;

[0033] 6 - Hall element;

[0034] 7 - Magnetic ring;

[0035] 8 - Cable;

[0036] 9 - First bearing;

[0037] 10 - Second bearing;

[0038] 11 - First pressing part;

[0039] 12 - Nut. Detailed implementation manner

[0040] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0042] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms are not used to limit the present utility model. Embodiment

[0043] See Figures 1-7 As shown, a front wheel speed measurement hub includes a hub housing 1. One end of the hub housing 1 is threadedly connected with a hub end cover 2. The hub housing 1 and the hub end cover 2 form a housing as the external protection and support components of the entire hub. Among them, the threaded connection method of the hub end cover 2 not only provides a stable connection, but also facilitates disassembly and maintenance when needed.

[0044] A core shaft 3 is horizontally arranged on the hub housing 1 and the hub end cover 2. The core shaft 3 passes through them. A bearing structure is arranged between the core shaft 3 and the hub housing 1 and the hub end cover 2. The existence of this bearing structure effectively reduces the frictional resistance between the core shaft 3 and the hub housing 1 and the hub end cover 2, enabling the hub housing 1 and the hub end cover 2 to rotate smoothly relative to the core shaft 3.

[0045] Inside the hub shell 1, there is a mounting seat 4 fixed on the spindle 3. On the mounting seat 4, there is a Hall plate 5, and on the Hall plate 5, there are Hall elements 6. On the hub shell 1, there is a magnetic ring 7 that matches the Hall elements 6. The Hall elements 6 sense the rotation of the hub shell 1 by monitoring the motion state of the magnetic ring 7. When the hub shell 1 rotates with the rotation of the front wheel, the magnetic ring 7 will also move accordingly. The Hall elements 6 can sensitively capture the magnetic field changes generated by the magnetic ring 7 and convert these changes into electrical signals. These electrical signals can accurately obtain the rotational speed information of the front wheel after being processed and analyzed. This speed measurement mechanism has the characteristics of high precision, high reliability, and fast response.

[0046] On the spindle 3, there is a wire groove 31 that connects the inside and outside of the hub shell 1. The wire groove 31 provides a reasonable channel and protection for the layout of the internal cables. Inside this wire groove 31, there is a cable 8 carefully arranged. One end of the cable 8 is tightly connected to the key Hall plate 5 to ensure stable transmission of electrical signals. The other end of the cable 8 is exposed and equipped with a convenient quick connector.

[0047] This design has significant advantages. For example, the quick connector is convenient for quickly connecting to external devices, improving the assembly and maintenance efficiency of the entire system. And the cable 8 is laid out through the wire groove 31, which not only avoids the chaotic winding of the cable inside the hub but also effectively protects the cable, reducing the wear and interference it suffers during riding, and ensuring the stability and reliability of the signal transmission of the front wheel speed measurement hub.

[0048] In this embodiment, the spindle 3 includes a spindle main body 32 with an overall columnar structure. At both ends of the spindle main body 32, there are external thread structures 33 and 34 distributed. On the spindle main body 32 near the external thread structure 33, there is a first protrusion 35. The first protrusion 35 has a vertical side wall, and this vertical side wall enables one side of the first bearing 9 to accurately abut in the structure. It provides a stable support and a clear position limit for the first bearing 9. On the spindle main body 32 near the external thread structure 34, there is a third protrusion 36. The outer surface of the third protrusion 36 is named the first step. Inside the third protrusion 36, there is a second protrusion 37. The second protrusion 37 bulges relative to the first step and can provide a stable support and a clear position limit for the second bearing 10.

[0049] The above-mentioned spindle main body 32, first protrusion 35, second protrusion 37, and third protrusion 36 are all of an integral structure. This integrated design ensures the connection strength and stability between parts and will not affect the overall performance due to loosening or separation of the connection parts. Secondly, the integrated structure reduces the assembly error between parts and improves the accuracy and reliability of the entire spindle.

[0050] In this embodiment, one end opening of the wire groove 31 is located on the first step, and an arc-shaped card slot 311 is formed here. The position of this arc-shaped card slot 311 is quite ingenious. It is located outside the second bearing. This layout design is of great significance and can produce a certain clamping effect on the cable.

[0051] When the vehicle is in operation, various vibrations and shakes will inevitably occur. However, due to the existence of the arc-shaped card slot 311, the movement range of the cable at this position can be effectively restricted, preventing it from shaking significantly here. This helps to maintain the stable position of the cable and reduce problems such as wear, short circuit, or unstable signal transmission that may be caused by the shaking of the cable.

[0052] The other end opening 312 of the wire groove 31 is located at the junction of the second protrusion 37 and the mandrel body 32. Such a position arrangement is carefully considered. On the one hand, it can make full use of the space on the mandrel, making the layout of the wire groove 31 more reasonable and compact; on the other hand, leading out the cable from this position can reduce the torsion and tension suffered by the cable during the rotation of the mandrel, thereby extending the service life of the cable and ensuring the continuity and stability of signal transmission.

[0053] The other end of the hub shell 1 is specifically provided with a first card slot for the first bearing 9 to be clamped. A first pressing member 11 is also provided outside the first bearing 9, and the edge of the first pressing member 11 can be accurately clamped into the first card slot, thus achieving a stable installation. A nut 12 is threadedly connected to the mandrel 3, and one side of the nut 12 closely abuts against the outside of the first pressing member 11.

[0054] When the first bearing 9 and the first pressing member 11 are installed in place, one side of the first bearing 9 can abut against the vertical side wall of the first protrusion 35. Such a structural layout, on the one hand, ensures that the position of the first bearing 9 in the hub shell 1 is accurate and stable, without loosening or shifting, thus guaranteeing the accuracy and stability of the front wheel rotation. On the other hand, the cooperation between the nut 12 and the first pressing member 11 can effectively apply pressure, further enhancing the tightness of the entire structure. For example, during frequent acceleration, deceleration, and turning during cycling, this stable connection can withstand large axial and radial forces, reduce wear and looseness between components, extend the service life of the hub, and provide a continuous and reliable cycling experience for cyclists.

[0055] The hub end cap 2 is provided with a second card slot for the second bearing 10 to be clamped. Outside the second bearing 10, a second pressing member 13 is provided. Both the second bearing 10 and the second pressing member 13 are arranged on the first step of the mandrel 3, and the edge of the second pressing member 13 can be clamped into the second card slot.

[0056] When the second bearing 10 and the second pressing member 13 are installed in place, one side of the second bearing 10 will closely abut against the side wall of the second protrusion 37. The advantages of this structure are significant. Firstly, it ensures the precise position and stability of the second bearing 10 within the hub end cap 2, effectively preventing it from wobbling or dislocating during operation. Secondly, this close abutting relationship can evenly disperse the forces borne, reduce local pressure concentration, and lower the wear degree of the second bearing 10.

[0057] In this embodiment, the bottom of the mounting seat 4 presents a semi-circular structure 41, and this unique design enables it to perfectly fit the outer surface of the mandrel 3. This adaptability not only ensures the mounting stability of the mounting seat 4 on the mandrel 3 but also minimizes the gap between the two, avoiding unnecessary wobbling and displacement during operation.

[0058] The mounting seat 4 is locked to the mandrel 3 by bolts. This connection method is simple and reliable, facilitating installation and disassembly. At the same time, it can provide sufficient fastening force to ensure that the mounting seat 4 is firmly fixed on the mandrel 3 under various complex riding conditions.

[0059] The Hall plate 5 is also locked to the mounting seat 4 by bolts, providing stable support and fixation for it.

[0060] In addition, the edge of the mounting seat 4 is also provided with a specially designed cable slot 42. The cable slot 42 can be used for the cable 8 to be bent and clamped. This design plays an important role. When the cable 8 is bent and clamped into the cable slot 42, it can effectively position the cable 8. Especially in ensuring the stability of the wire head soldered to the Hall plate 5. During the riding process, the vehicle will inevitably experience vibrations and bumps, but the above-mentioned cable slot 42 can reduce the pulling and loosening of the cable 8 caused by vibrations, ensuring that the connection between the wire head and the Hall plate 5 is always stable and reliable, thus guaranteeing the stable transmission of the speed measurement signal. For example, during high-speed riding or riding on rough roads, the cable slot 42 can effectively prevent the cable 8 from being in poor contact or disconnected due to wobbling.

[0061] In this embodiment, a number of positioning holes 21 are circumferentially arranged on the outer surface of the hub end cap 2. The distribution of these positioning holes 21 is very regular, and the adjacent positioning holes 21 are equally spaced. This circumferentially ordered arrangement of the positioning holes 21 is evenly distributed and fixed in position. When installing or disassembling the hub end cap 2, it can provide accurate and stable force application points. This means that we can use a specially customized wrench to apply torque by inserting into these positioning holes 21 to thread-lock the hub end cap 2 onto the hub housing 1, or operate in the reverse to disassemble the hub end cap 2 from the hub housing 1.

[0062] The present utility model reserves sufficient space inside the hub for placing Hall elements and magnetic rings. By using the Hall elements and magnetic rings in combination, the rotation of the hub shell is monitored. Through the processing of the detected data at the rear end, key parameters such as the rotation speed, direction, and number of rotations of the hub shell can be accurately calculated. At the same time, the spindle and the mounting seat are improved, reducing the crossing and chaos between cables, lowering the risk of wear and damage to the cables themselves, and effectively avoiding the adverse effects of cable routing on the operation of the hub. Whether under high-speed rotation or complex road conditions, it can ensure that the cables will not become a factor affecting the normal operation of the hub, thus providing a continuous, stable, and reliable riding experience for cyclists.

[0063] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0066] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A front wheel speed measuring hub, comprising a hub shell, one end of the hub shell being threadedly connected to a hub end cover, a mandrel being transversely arranged on the hub shell and the hub end cover, and a bearing structure being arranged between the mandrel and the hub shell and the hub end cover; characterized in that: A mounting seat fixed on the core shaft is arranged in the hub shell, a Hall plate is arranged on the mounting seat, and a Hall element is arranged on the Hall plate; a magnetic ring matching the Hall element is arranged on the hub shell; a wire groove connecting the inside and outside of the hub shell is arranged on the core shaft, a cable is arranged in the wire groove, one end of the cable is connected to the Hall plate, and the edge of the mounting seat has a cable clamping groove for bending and clamping the cable.

2. The front wheel speed measuring hub according to claim 1, characterized in that: The other end of the hub shell is provided with a first slot for clamping the first bearing, and a first clamping piece is provided on the outer side of the first bearing, and the edge of the first clamping piece is clamped into the first slot; a nut is threadedly connected on the core shaft, and one side of the nut abuts against the outer side of the first clamping piece.

3. The front wheel speed measuring hub according to claim 2, characterized in that: The core shaft is provided with a first protrusion, the first protrusion has a vertical side wall, and one side of the first bearing abuts against the vertical side wall.

4. The front wheel speed measuring hub according to claim 1, characterized in that: The hub end cover is provided with a second slot for the second bearing to be clamped, a second clamping piece is provided on the outer side of the second bearing, the second bearing and the second clamping piece are both arranged on the first step of the core shaft, and the edge of the second clamping piece is clamped into the second slot.

5. The front wheel speed measuring hub according to claim 4, characterized in that: The core shaft is provided with a second protrusion, the second protrusion abuts against one side of the first step and one side of the second bearing abuts against the side wall of the second protrusion.

6. The front wheel speed measuring hub according to claim 1, characterized in that: A plurality of positioning holes are circumferentially arranged on the outer surface of the hub end cover, and adjacent positioning holes are equidistantly distributed.

7. The front wheel speed measuring hub according to claim 1, characterized in that: The bottom of the mounting seat is a semicircular structure and is adapted to the outer surface of the core shaft. The mounting seat is locked on the core shaft by bolts.

8. The front wheel speed measuring hub according to claim 5, characterized in that: One end of the wire passing groove is located on the first step, and an arc-shaped groove is formed on the first step, and the arc-shaped groove is located outside the second bearing; the other end of the wire passing groove is located at the intersection of the second protrusion and the core shaft body.

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