Sensor fixing structure and electric bicycle

Abstract

The utility model discloses a sensor fixing structure and an electric bicycle. The sensor fixing structure comprises a shaft roller, a sensor assembly and a right bowl assembly, the shaft roller is sleeved with the sensor assembly, the right bowl assembly comprises a right bowl and a bearing, a mounting groove is formed in the right bowl, the inner surface of the bearing is in clearance fit with the outer surface of the sensor assembly, and the outer surface of the bearing is fixedly connected with the groove wall of the mounting groove. The outer surface of the bearing is fixedly connected with the groove wall of the mounting groove, so that the outer surface of the bearing cannot shake relative to the right bowl piece, deflection of the fluted disc is avoided, the reliability of connection between the fluted disc and the chain is improved, and the use reliability of the electric bicycle is improved.

Description

Technical Field

[0001] The utility model relates to the field of electric bicycles, in particular to a sensor fixing structure and an electric bicycle. Background Art

[0002] With the rapid development of electric bicycles, people's requirements for electric bicycles are getting higher and higher. There are many sensors in electric bicycles, and mid-to-high-end sensors can be used to measure the torque of the pedals of electric bicycles and measure the pedaling speed. The existing sensor fixing structure usually includes a shaft and a left bowl assembly and a right bowl assembly arranged on both sides of the shaft, and also includes a sensor assembly arranged between the left bowl assembly and the right bowl assembly, and the sensor assembly is coaxially assembled on the shaft. However, there is a gap between the existing right bowl assembly and the outer surface of the bearing. When the user drives the sprocket to rotate, there will be a certain amplitude of shaking between the outer surface of the bearing and the right bowl assembly, and the sprocket will produce a deflection (the larger the outer diameter of the sprocket, the greater the deflection), causing the sprocket and chain to produce abnormal noise or even the chain to detach from the sprocket, reducing the reliability of the electric bicycle. Utility Model Content

[0003] The main purpose of the utility model is to provide a sensor fixing structure and an electric bicycle, so as to solve the problem that the gear disc may deflect.

[0004] To achieve the above-mentioned purpose, the sensor fixing structure proposed in the present invention includes a shaft rod, a sensor assembly and a right bowl assembly. The sensor assembly is sleeved on the outside of the shaft rod. The right bowl assembly includes a right bowl and a bearing. The right bowl is formed with a mounting groove. The inner surface of the bearing is loosely matched with the outer surface of the sensor assembly, and the outer surface of the bearing is fixedly connected to the groove wall of the mounting groove.

[0005] Optionally, the outer surface of the bearing is interference fit with the groove wall of the mounting groove.

[0006] Optionally, fixing glue is provided between the outer surface of the bearing and the groove wall of the installation groove.

[0007] Optionally, the right bowl assembly further includes a retaining spring, which is disposed in the right bowl, and the bearing is located between the bottom wall of the mounting groove and the retaining spring.

[0008] Optionally, the right bowl member forms a limiting groove, and the retaining spring is installed in the limiting groove.

[0009] Optionally, the sensor assembly includes a relatively rotating part and a relatively stationary part, the inner surface of the bearing is clearance-matched with the outer surface of the relatively rotating part, and the sensor fixing structure also includes a gear disk and a fastener, the gear disk is sleeved on the relatively rotating part, and the gear disk and the relatively rotating part are detachably connected through the fastener.

[0010] Optionally, a first thread segment is provided on the fastener, a second thread segment is provided on the relatively rotating portion, the first thread segment is threadedly connected to the second thread segment, and the fastener abuts against a side of the gear disc away from the bearing.

[0011] Optionally, the relative rotation portion forms a limiting step, the gear disc includes a main body and a limiting protrusion connected to each other, one side of the bearing abuts against the limiting step, and the other side of the bearing abuts against the limiting protrusion.

[0012] Optionally, a first anti-rotation portion is provided on the side of the right bowl piece close to the relatively stationary portion, and a second anti-rotation portion is provided on the side of the relatively stationary portion close to the right bowl piece, and the first anti-rotation portion cooperates with the second anti-rotation portion to prevent the relatively stationary portion from rotating relative to the right bowl piece.

[0013] Optionally, the first anti-rotation portion includes at least one latching tooth, and the second anti-rotation portion includes at least one latching groove, and the latching tooth is located in the latching groove.

[0014] In addition, the present invention also provides an electric bicycle, which includes the sensor fixing structure described above.

[0015] The sensor fixing structure in the technical solution of the present invention has a mounting groove formed on the inner side of the right bowl, and the outer surface of the bearing is fixedly connected to the groove wall of the mounting groove, so that the outer surface of the bearing will not shake or swing relative to the right bowl, thereby preventing the outer surface of the bearing from shaking in the right bowl when the sprocket rotates, and the outer surface of the bearing will not produce axial displacement relative to the groove wall of the mounting groove, thereby preventing the sprocket from swinging. At the same time, the fasteners tightly lock the sprocket, the inner diameter of the bearing and the relatively rotating part of the sensor assembly together, thereby improving the connection reliability between the sprocket and the chain or belt, thereby improving the reliability of the electric bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 It is an exploded schematic diagram of an existing sensor fixing structure;

[0018] Figure 2 It is a cross-sectional schematic diagram of an existing sensor fixing structure;

[0019] Figure 3 This is a structural diagram of a sensor fixing structure according to an embodiment of the present application;

[0020] Figure 4 This is an exploded schematic diagram of a sensor fixing structure according to an embodiment of the present application;

[0021] Figure 5 This is a cross-sectional schematic diagram of a sensor fixing structure according to an embodiment of the present application;

[0022] Figure 6 for Figure 5 A magnified schematic diagram of point A in the middle;

[0023] Figure 7 This is an exploded schematic diagram of the right bowl component in the sensor fixing structure according to one embodiment of the present application;

[0024] Figure 8 This is a structural diagram of the right bowl component in the sensor fixing structure according to one embodiment of the present application;

[0025] Figure 9 This is a schematic exploded view of the right bowl and the relatively stationary portion in the sensor fixing structure according to one embodiment of the present application.

[0026] Description of Figure Numbers:

[0027]

[0028]

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0035] In this utility model, the descriptions of directions such as "up", "down", "front", "back", "left", and "right" are as follows: Figure 1 The directions shown are for reference only and are used to explain the Figure 1 The relative positional relationship between the components in the shown posture. If the specific posture changes, the directional indication will also change accordingly.

[0036] The utility model provides a sensor fixing structure 100 and an electric bicycle.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 is an exploded schematic diagram of an existing sensor fixing structure 100. Figure 2 1 is a cross-sectional view of a conventional sensor fixing structure 100. For ease of description, spatial features such as slots, holes, and cavities are marked with arrows in the drawings, while physical structural features are marked with arrows in the drawings.

[0038] In the existing sensor fixing structure 100, the sensor fixing structure 100 includes a shaft 1, a sensor assembly 2, a right bowl 4, and a bearing 3. The sensor assembly 2 is sleeved on the outside of the shaft 1. The sensor assembly 2 includes a relatively stationary portion 22 and a relatively rotating portion 23. The relatively stationary portion 22 does not rotate with the shaft 1, and the relatively rotating portion 23 is connected to the shaft 1 through a toothed structure and can rotate with the shaft 1. The sensor assembly 2 can also include sensors such as a torque sensor and a speed sensor (not shown in the figure) for measuring the torque of the pedaling of the electric bicycle and measuring data such as the pedaling speed.

[0039] The relatively rotating portion 23 is detachably connected to the toothed disc 5, which can be coupled with a chain or belt to achieve power transmission. The right bowl 4 remains stationary relative to the relatively stationary portion 22. The inner surface 31 of the bearing 3 is tightly fitted with the outer end surface 232 of the relatively rotating portion 23, and the inner ring of the bearing 3 rotates with the shaft 1.

[0040] In conventional practice, a left bowl assembly 8 is also provided on the other side of the shaft 1. The left bowl assembly 8 and the right bowl 4 are located at the axial ends of the shaft 1, respectively. The left bowl assembly 8 comprises a left bowl 81, a left bearing 82, and a left retaining spring 83. The left bearing 82 is mounted within the left bowl 81 and is retained and fixed by the left retaining spring 83 to prevent axial displacement of the left bearing 82.

[0041] That is, when installing the existing sensor fixing structure 100, the right bowl 4 (described in detail later, the inner ring of the right bowl 4 is provided with a first anti-rotation portion 41 that cooperates with the relatively stationary portion 22 to prevent the relatively stationary portion 22 from rotating relative to the right bowl 4) is first assembled into the frame's bottom bracket (the bottom bracket is the tube perpendicular to the plane of the sprocket 5, not shown in the figure). This prevents the signal output line in the relatively stationary portion 22 from being damaged by rotation when the left bowl assembly 8 is rotated for assembly. Then, the sensor assembly 2 (including the bearing 3) with the shaft 1 assembled is assembled into the right bowl 4.

[0042] The outer surface 32 of the existing bearing 3 and the right bowl piece 4 are manually slidably assembled (the sliding assembly must be a clearance fit). In this way, when the user pedals, the rotational torque of the shaft 1 is transmitted to the relative rotating part 23 of the sensor assembly 2, and the relative rotating part 23 drives the sprocket 5 to rotate. There is a gap between the outer surface 32 of the bearing 3 and the right bowl piece 4. Therefore, there will be a certain degree of shaking between the outer surface 32 of the bearing 3 and the right bowl piece 4. This will cause the sprocket 5 to have serious deflection when riding with heavy loads (the larger the outer diameter of the sprocket 5, the greater the deflection), causing the sprocket 5 and the chain or belt to produce abnormal engagement noise, or even the chain or belt to fall off the sprocket 5, reducing the reliability of the electric bicycle.

[0043] In order to solve the problem of the deflection of the toothed disc 5, the present application proposes a sensor fixing structure 100. Figures 3 to 6 , Figure 3 This is a structural diagram of a sensor fixing structure 100 according to an embodiment of the present application. Figure 4 This is an exploded diagram of a sensor fixing structure 100 according to an embodiment of the present application. Figure 5 This is a cross-sectional diagram of a sensor fixing structure 100 according to an embodiment of the present application. Figure 6 for Figure 5 Enlarged schematic diagram of point A in the middle.

[0044] A mounting groove 43 is formed on the inner side of the right bowl 4, and the outer surface 32 of the bearing 3 is fixedly connected to the groove wall of the mounting groove 43, so that the outer surface 32 of the bearing 3 will not shake or swing relative to the right bowl 4, thereby preventing the outer surface 32 of the bearing 3 from shaking in the right bowl 4 when the sprocket 5 rotates, and the outer surface 32 of the bearing 3 will not produce axial displacement relative to the groove wall of the mounting groove 43. (Detailed description will be given later on. The sliding clearance between the inner surface 31 of the bearing 3 and the relative rotating part 23 of the sensor assembly 2 is matched by fasteners 9 to tightly lock the sprocket 5, the inner ring of the bearing 3, and the relative rotating part 23 together.) Therefore, the sprocket 5 is prevented from swinging, thereby improving the connection reliability between the sprocket 5 and the chain or belt, thereby improving the reliability of the electric bicycle.

[0045] It is understandable that the bearing 3 may be a ball bearing, the inner ring of which is rotatable and the outer ring is fixed and does not rotate.

[0046] When the sensor fixing structure 100 of the present application is installed, the sensor fixing structure 100 first installs the bearing 3 in the installation groove 43 of the right bowl part 4 when leaving the factory. The right bowl part 4 and the bearing 3 form a right bowl part assembly 6. After being shipped to the client (vehicle manufacturer), the right bowl part assembly 6 is assembled with the five-way bracket of the frame from the right side of the frame, and then the sensor assembly 2 after the shaft rod 1 is assembled is slid into the right bowl part assembly 6 from the left side of the frame. The loading process is simpler and can improve the assembly efficiency (in the prior art, the bearing 3 is first pre-installed on the relative rotating part 23 of the sensor assembly 2, and the inner surface 31 of the bearing 3 is tightly fitted with the relative rotating part 23. Then, the sensor assembly 2 after the shaft rod 1 is assembled is installed from the right side of the five-way bracket of the frame to the left into the right bowl part 4, and then a special retaining ring pliers is used to install the configured retaining ring 7 into the right bowl part 4).

[0047] On this basis, the outer surface 32 of the bearing 3 can be interference fit with the groove wall of the installation groove 43. The interference fit connection has the advantages of good centering, large load-bearing capacity, small weakening of the shaft strength, and good impact resistance.

[0048] A fixing adhesive (not shown) may also be provided between the outer surface 32 of the bearing 3 and the wall of the mounting groove 43 to securely connect the outer surface 32 of the bearing 3 to the wall of the mounting groove 43. The fixing adhesive may be an epoxy adhesive, an acrylic adhesive, or other adhesive, as long as the fixing adhesive is able to firmly adhere the outer surface 32 of the bearing 3 to the wall of the mounting groove 43. The present application does not limit the specific type of the fixing adhesive.

[0049] In some embodiments, please refer to Figure 6 and Figure 7 The right bowl assembly 6 further includes a retaining spring 7, which is disposed in the right bowl 4. The bearing 3 is located between the bottom wall of the mounting groove 43 and the retaining spring 7. The retaining spring 7 is provided to strengthen the reliability of the fixing of the bearing 3 to the mounting groove 43 of the right bowl 4, thereby ensuring that the bearing 3 can remain reliably in the mounting groove 43 of the right bowl 4 during long-term operation, thereby avoiding affecting the power transmission of the chain or belt (if the bearing 3 is used in the right bowl 4 for a long time and slowly produces a small movement along the axial direction of the shaft 1, the movement may become larger over time, making it difficult for the chain or belt to engage with the teeth of the chain plate 5, and even causing the chain or belt to fall off the chain plate 5 during riding, making the electric bicycle unrideable).

[0050] like Figure 1 and Figure 2 As shown, since the outer surface 32 of the bearing 3 and the right bowl 4 are connected in a sliding manner rather than a fixed connection in the prior art, it is necessary to first assemble the right bowl 4 into the five-way bracket of the frame, and then assemble the sensor assembly 2 after assembling the shaft rod 1 and other accessories from the right side of the frame to the left into the right bowl 4, and then install the retaining spring 7 in the right bowl 4. When installing the retaining spring 7, it is usually necessary to manually fix the frame with one hand and install the retaining spring 7 into the right bowl 4 by pressing with the other hand. That is, the traditional method can only complete the assembly of the retaining spring 7 manually. During the operation, it is easy for the retaining spring 7 to pop out and hit the human body or even the face due to careless operation, which poses a great safety hazard.

[0051] In this embodiment, please refer to Figure 6 、 Figure 7 and Figure 8 , Figure 7 This is an exploded view of the right bowl component 6 in the sensor fixing structure 100 according to an embodiment of the present application. Figure 8This is a structural diagram of the right bowl assembly 6 in the sensor fixing structure 100 of an embodiment of the present application. The bearing 3 can be installed in the installation groove 43 of the right bowl 4 first, and then the retaining spring 7 can be installed in the right bowl 4. The position of the bearing 3 is fixed by the retaining spring 7. The bearing 3, the right bowl 4 and the retaining spring 7 form a whole (i.e., the right bowl assembly 6). This process is completed in the sensor production plant. For the client (the whole vehicle manufacturer), the right bowl assembly 6 is first assembled with the five-way valve of the frame, and then the sensor assembly 2 is installed into the right bowl assembly 6 from the left side of the frame to the right. This can save processing time, improve assembly efficiency, and avoid the retaining spring 7 popping out and hitting the human body, thereby improving assembly safety. In addition, the bearing 3 and the retaining spring 7 can be pre-assembled into the right bowl 4 in an automated or semi-automated manner (such as assembly by a robot), which can further improve assembly efficiency and save processing time.

[0052] On this basis, if Figure 5 As shown, the right bowl 4 is formed with a limiting groove 42, and the retaining spring 7 is installed in the limiting groove 42. By providing the limiting groove 42 for installing the retaining spring 7, the position of the retaining spring 7 can be fixed, and the limiting effect of the retaining spring 7 on the bearing 3 is improved.

[0053] In some embodiments, as Figure 4 and Figure 5 As shown, the sensor fixing structure 100 further includes a gear disc 5 and a fastener 9 . The gear disc 5 is sleeved on the relative rotating portion 23 , and the gear disc 5 and the relative rotating portion 23 are detachably connected via the fastener 9 .

[0054] The toothed disc 5 is provided with a toothed portion, which is used to cooperate with the chain or belt. The rotation of the toothed disc 5 drives the chain or belt to rotate. Figure 3 The toothed portion of the outer ring of the toothed disc 5 is not shown. The entire toothed disc 5 can be found in the attached diagram. Figure 4 The toothed disc 5 structure in the embodiment may have a toothed structure that matches a chain or a belt structure.

[0055] The fastener 9 is provided with a first threaded segment 91, and the relatively rotating portion 23 is provided with a second threaded segment 231. The first threaded segment 91 and the second threaded segment 231 are threadedly connected, and the fastener 9 abuts the side of the sprocket 5 away from the bearing 3. In other words, the fastener 9 is a nut, and the threaded connection achieves a detachable connection between the sprocket 5 and the relatively rotating portion 23, improving the efficiency of installation and removal of the sprocket 5. Furthermore, the threaded connection is self-locking, making the connection between the sprocket 5 and the relatively rotating portion 23 even tighter and more reliable.

[0056] When installing the gear disc 5, the main body 52 can be first sleeved on the relative rotating part 23. The main body 52 and the relative rotating part 23 are connected through a tooth shape. Then, the first thread segment 91 on the fastener 9 is threadedly connected with the second thread segment 231, so that the fastener 9 abuts against the side of the gear disc 5 away from the bearing 3.

[0057] In other embodiments, the fastener 9 can be a flange, which is directly locked on the relative rotating part 23 (the flange can be locked on the relative rotating part 23 by means of a threaded connection), one end of the flange directly abuts against the right end face of the inner ring of the bearing 3, and the corresponding gear disc 5 is then locked on the flange (the original toothed structure of the relative rotating part 23 and the gear disc 5 is cancelled); or the fastener 9 is eliminated, and threads are directly provided on the gear disc 5, and the gear disc 5 is directly locked on the relative rotating part 23 by means of threads (the original toothed structure of the relative rotating part 23 and the gear disc 5 is cancelled).

[0058] In some embodiments, as Figure 6 As shown, the relatively rotating portion 23 of the sensor assembly 2 forms a limiting step 233. The sprocket 5 also includes a connected main body 52 and a limiting protrusion 53. The inner ring of the bearing 3 is mounted on the outer end face 232 of the relatively rotating portion 23 and abuts the limiting step 233 on the left side. The limiting step 233 is used to limit the leftward movement of the inner ring of the bearing 3. The right side of the inner ring of the bearing 3 abuts the limiting protrusion 53. The limiting protrusion 53 of the sprocket 5, the inner ring of the bearing 3, and the relatively rotating portion 23 are then tightly locked together by fasteners 9, limiting the rightward movement of the inner ring of the bearing 3. This further prevents the sprocket 5 from wobble and improves the reliability of the electric bicycle.

[0059] It can be understood that the inner ring diameter of the retaining spring 7 is relatively large, and the limiting protrusion 53 and the retaining spring 7 are arranged at radial intervals along the shaft rod 1, so that the retaining spring 7 and the limiting protrusion 53 will not interfere or hinder each other, and the retaining spring 7 and the limiting protrusion 53 can jointly limit the bearing 3.

[0060] In some embodiments, see Figure 9 , Figure 9 1 is an exploded schematic diagram of the right bowl 4 and the relatively stationary portion 22 in the sensor fixing structure 100 according to an embodiment of the present application.

[0061] A first rotation-stopping portion 41 is provided on a side of the right bowl 4 near the relatively stationary portion 22, and a second rotation-stopping portion 21 is provided on an outer circumferential surface 221 of the relatively stationary portion 22 near the right bowl 4. The first rotation-stopping portion 41 cooperates with the second rotation-stopping portion 21 to prevent the relatively stationary portion 22 from rotating relative to the right bowl 4. The provision of the first rotation-stopping portion 41 and the second rotation-stopping portion 21 maintains relative stationarity between the relatively stationary portion 22 and the right bowl 4, preventing the relatively stationary portion 22 from rotating relative to the right bowl 4.

[0062] The first anti-rotation portion 41 may include at least one slot 411, and the second anti-rotation portion 21 may include at least one tooth 211, which is located within the slot 411. The slot 411 extends axially along the shaft 1, and the tooth 211 matches the slot 411. The tooth 211 is located within the slot 411. By inserting the tooth 211 into the slot 411, the relatively stationary portion 22 is prevented from rotating relative to the right bowl 4.

[0063] The number of the latching slots 411 can be one, two, or more, and the number of the latching teeth 211 can be one, two, or more. The number of the latching slots 411 and the latching teeth 211 can be the same and arranged in a one-to-one correspondence, or the number of the latching teeth 211 can be less than the latching slots 411. By providing a plurality of latching slots 411, the anti-rotation effect of the latching slots 411 can be improved, so that the force applied to the right bowl 4 is more uniform, thereby extending the service life of the right bowl 4.

[0064] The latch 211 is provided with a guide notch 212, which guides the latch 211 so that it can be inserted more smoothly into the slot 411, thereby improving assembly efficiency. The slot 411 can also be provided with a guide notch 212 to further facilitate the insertion of the latch 211 into the slot 411.

[0065] In addition, the present invention further provides an electric bicycle including the sensor fixing structure 100 described above. The specific structure of the sensor fixing structure 100 is similar to that of the above-described embodiment. Since the electric bicycle adopts all the technical solutions of the above-described embodiment, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiment, and therefore will not be described in detail here.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sensor fixing structure, characterized in that: It includes a shaft, a sensor assembly and a right bowl assembly. The sensor assembly is sleeved on the outside of the shaft. The right bowl assembly includes a right bowl and a bearing. The right bowl is formed with a mounting groove. The inner surface of the bearing is loosely matched with the outer surface of the sensor assembly. The outer surface of the bearing is fixedly connected to the groove wall of the mounting groove.

2. The sensor fixing structure according to claim 1, wherein: The outer surface of the bearing is interference fit with the groove wall of the installation groove.

3. The sensor fixing structure according to claim 1, wherein: A fixing glue is provided between the outer surface of the bearing and the groove wall of the installation groove.

4. The sensor fixing structure according to claim 1, wherein: The right bowl component also includes a retaining spring, which is arranged in the right bowl component, and the bearing is located between the bottom wall of the mounting groove and the retaining spring.

5. The sensor fixing structure according to claim 4, wherein: The right bowl member forms a limiting groove, and the retaining spring is installed in the limiting groove.

6. The sensor fixing structure according to any one of claims 1 to 5, characterized in that: The sensor assembly includes a relatively rotating part and a relatively stationary part, and the inner surface of the bearing is clearance-matched with the outer surface of the relatively rotating part; the sensor fixing structure also includes a gear disk and a fastener, the gear disk is sleeved on the relatively rotating part, and the gear disk and the relatively rotating part are detachably connected through the fastener.

7. The sensor fixing structure according to claim 6, wherein: The fastener is provided with a first thread segment, the relatively rotating portion is provided with a second thread segment, the first thread segment is threadedly connected to the second thread segment, and the fastener abuts against a side of the gear disc away from the bearing.

8. The sensor fixing structure according to claim 6, wherein: The relative rotation portion forms a limiting step, the gear disc includes a main body and a limiting protrusion connected to each other, one side of the bearing abuts against the limiting step, and the other side of the bearing abuts against the limiting protrusion.

9. The sensor fixing structure according to claim 6, wherein: A first anti-rotation portion is provided on a side of the right bowl piece close to the relatively stationary portion, and a second anti-rotation portion is provided on a side of the relatively stationary portion close to the right bowl piece. The first anti-rotation portion cooperates with the second anti-rotation portion to prevent the relatively stationary portion from rotating relative to the right bowl piece.

10. The sensor fixing structure according to claim 9, wherein: The first anti-rotation portion includes at least one latching tooth, and the second anti-rotation portion includes at least one latching groove, wherein the latching tooth is located in the latching groove.

11. An electric bicycle, characterized in that: The electric bicycle includes the sensor fixing structure according to any one of claims 1 to 10.

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