Mounting and fixing device for middle motor of bicycle

Abstract

The invention discloses a bicycle middle motor mounting and fixing device which comprises a frame and a motor, and the motor is mounted at a five-way pipe of the frame through a pressing plate and fixed through a locking piece. A shell of the motor is provided with a supporting assembly, the supporting assembly is provided with a supporting piece, the supporting piece is provided with a guide rod, the position of the guide rod can be adjusted up and down, the guide rod can be locked and fixed, and the upper end of the guide rod is provided with a transverse plate; by adjusting the position of the guide rod, the head of the motor can abut against a diagonal draw bar of the frame, and the upper end of the transverse plate can abut against a bottom rod of the frame. In this way, the original pressing plate and the locking piece become auxiliary supporting parts, it is guaranteed that the motor is stable and does not loosen in the process of being used on the frame for a long time, and due to the fact that the motor is arranged below the frame, attractiveness is achieved.

Description

Technical Field

[0001] The invention belongs to the field of mid-mounted motors and relates to a mid-mounted motor installation and fixing device for a bicycle. Background Art

[0002] In the current field of electric power-assisted bicycles, the installation and fixing method of the mid-mounted motor is crucial to the safety and stability of riding. At present, the mid-mounted motor on the electric power-assisted bicycle is generally tightened to the five-way pipe of the frame with a pressure plate, and then fixed with a locking piece. However, this installation method will expose many problems after long-term use.

[0003] As the use time increases, the pressure plate tends to loosen, causing the motor head to sag. When the motor is working, the motor head will run up and hit the frame due to this looseness, and it will fall down when the motor is not started. This not only poses a serious safety hazard, but also greatly affects the riding experience. This unstable state may cause the rider to suddenly lose balance during driving, increasing the risk of accidents.

[0004] In order to solve this problem, the existing Chinese patent with authorization announcement number CN213502779U discloses a bicycle mid-mounted motor fixing device, which fastens the motor by setting a clamp assembly between the motor and the lower tube of the frame to prevent the motor from shaking or loosening after long-term use. However, this clamp assembly also has certain limitations. First, the strength of the clamp is often insufficient, and it may not be able to provide sufficient tightening force when facing the vibration and stress generated when the motor is running, and thus cannot completely solve the problem of motor loosening. Secondly, the overall aesthetics of the clamp assembly is insufficient, which will affect the appearance design of the bicycle.

[0005] In summary, there are many problems with the current fixing method of the mid-mounted motor of the electric power-assisted bicycle. There is an urgent need for a new fixing device that can ensure that the motor is firmly installed, ensure riding safety, and also have good aesthetics to meet market demand. Summary of the invention

[0006] The purpose of the present invention is to provide a bicycle mid-mounted motor installation and fixing device to meet the market demand for safety and aesthetics.

[0007] The objective of the present invention is achieved through the following technical solutions: A bicycle mid-mounted motor installation and fixing device comprises a frame and a motor, wherein the motor is installed at the five-way pipe of the frame through a pressure plate and fixed with a locking piece; the characteristic is that a support assembly is arranged on the housing of the motor, the support assembly has a support piece, the support piece is provided with a guide rod which can be adjusted up and down and can be locked and fixed, and a cross plate is arranged at the upper end of the guide rod; by adjusting the position of the guide rod, the head of the motor can abut against the inclined rod of the frame and the upper end of the cross plate can abut against the bottom rod of the frame.

[0008] As a further improvement of one embodiment of the present invention, the support assembly includes a support member, one end of the support member is fixedly connected to the housing of the motor, the other end of the support member extends outward and is exposed outside the housing and has a support end extending to both sides, and the support end is provided with a first channel for placing the guide rod; the outer surface of the guide rod has an external thread and is installed on the support end through a nut assembly; the cross plate is provided with a first groove adapted to the upper end of the guide rod, and the upper end of the guide rod is inserted and placed in the first groove.

[0009] As a further improvement of one embodiment of the present invention, the nut assembly includes a gasket and a nut, and gaskets and nuts are provided at the upper and lower ends of the support end. The nut is threadedly connected to the guide rod and locks the gasket on the guide rod to the support end.

[0010] As a further improvement of an embodiment of the present invention, a second channel is provided on the support member located between the two guide rods, a guide member is provided in the second channel, and the upper end of the guide member is fixed to the transverse plate.

[0011] As a further improvement of an embodiment of the present invention, a second groove is provided on the support end between the first channel and the second channel, and the thickness of the support end at the second groove is smaller than the thickness of the support end outside the second groove.

[0012] As a further improvement of an embodiment of the present invention, the second grooves are distributed in pairs at the upper and lower ends of the support end.

[0013] As a further improvement of one embodiment of the present invention, the motor is mounted on the bottom bracket, and a line connecting a center point V of the motor mounted on the bottom bracket and a center point O of the motor head is used as a reference line M of the motor; when the motor is mounted on a frame, the motor swings and adjusts its position based on the center point V according to the type of bracket.

[0014] As a further improvement of an embodiment of the present invention, when the support member is a short-handled support member, the swing position range of the motor is between -25° and -60°.

[0015] As a further improvement of an embodiment of the present invention, when the support member is a long-handled support member, the swing position range of the motor is between 10° and -25°.

[0016] Of course, the swing range of the motor is only a preferred range to meet most market needs. The swing range of the motor is not limited to -25° to -60°. As long as the support and guide rod length are changed, a larger angle range can be achieved.

[0017] As a further improvement of an embodiment of the present invention, the upper end surface of the horizontal plate is an arc-shaped curved surface.

[0018] The adoption of the above technical solution has the following beneficial effects: since the cross plate supports the bottom bar of the frame from below, it will not weaken the strength of the frame like a clamp; at the same time, the support assembly becomes the main supporting component of the motor, and the original pressure plate and locking member become auxiliary supporting components, ensuring the stability of the motor on the bracket during long-term use, and having aesthetics while ensuring riding safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 This is a schematic diagram of the three-dimensional state of the bicycle mid-mounted motor installation and fixing device provided in Example 1 of the present invention.

[0022] Figure 2 for Figure 1 A magnified schematic diagram of area A in the middle.

[0023] Figure 3 This is a schematic diagram of the front structural view of the bicycle mid-mounted motor installation and fixing device provided in Example 1 of the present invention.

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the support assembly provided in Example 1 of the present invention.

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the support member provided in Example 1 of the present invention.

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the horizontal plate and guide member combination provided in Example 1 of the present invention.

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the support member, the horizontal plate, and the guide member combination provided in Example 1 of the present invention.

[0028] Figure 8 A schematic diagram of the motor deflection angle provided in Example 1 of the present invention.

[0029] Fig. 9 This is a schematic diagram of the front structural view of the bicycle mid-mounted motor installation and fixing device provided in Example 2 of the present invention.

[0030] Fig.10 This is a schematic diagram of the three-dimensional structure of the support assembly provided in Example 2 of the present invention.

[0031] Fig.11 A schematic diagram of the motor deflection angle provided in Example 2 of the present invention.

[0032] In the figure: 1-frame; 11-bottom bar; 12-diagonal tie rod; 2-motor; 21-pressing plate; 22-locking piece; 3, 4-support assembly; 31, 41-support member; 311, 312-second groove; 313-first channel; 314-second channel; 315, 316-support end; 32, 42-guide rod; 33, 43-cross plate; 331-arc surface; 332-first groove; 34-guide member; 35-nut; 36-gasket. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0035] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention. Example 1

[0036] See also Figure 1-Figure 3 As shown, a mid-mounted motor installation and fixing device for a bicycle includes a frame 1 and a motor 2. The motor 2 is installed at the five-way pipe of the frame 1 through a pressure plate 21 and fixed with a locking member 22 to ensure that the motor has a certain stability in the initial installation state. A support assembly 3 is provided on the housing of the motor 2. The support assembly 3 has a support member 31. The support member 31 is provided with a guide rod 32 that can be adjusted up and down and can be locked and fixed. The upper end of the guide rod 32 is provided with a cross plate 33. When in use, the position of the guide rod 32 is adjusted so that the head of the motor 2 abuts against the diagonal rod 12 of the frame and the upper end of the cross plate 33 abuts against the bottom rod 11 of the frame, thereby fixing the motor 2 on the frame 1. Preferably, an abutment block can be installed on the head of the motor 2, which is specifically used to contact the diagonal rod 12.

[0037] This type of installation and fixing device has many significant advantages. First, the cross plate 33 supports the bottom bar 11 of the frame from below. Unlike the existing clamp-type fixing method, it will not weaken the strength of the frame, and effectively ensures the structural integrity of the frame 1 during long-term use. Secondly, after the support assembly 3 becomes the main supporting component of the motor 2, the original pressure plate 21 and locking member 22 are transformed into auxiliary supporting components. Such structural adjustments greatly improve the stability of the motor 2 on the bracket 1 during long-term use, allowing riders to feel at ease whether riding on a flat road or a rugged mountain road. Furthermore, from the perspective of aesthetics, the device will not seriously damage the appearance of the frame like some traditional fixing devices while ensuring riding safety, making the bicycle more beautiful and elegant as a whole.

[0038] Combination Figure 4-Figure 7As shown, the support assembly 3 includes a support member 31, one end of which is firmly fixedly connected to the housing of the motor 2 by bolts to ensure that the support member 31 and the motor 2 will not loosen during riding. The other end of the support member 31 extends outward, exposed outside the housing of the motor 2, and has support ends 315 and 316 extending to both sides. The two support ends 315 and 316 are provided with a first channel 313, which is specially provided for the guide rod 32 to be inserted and placed. The outer surface of the guide rod 32 has an external thread, which is installed on the support ends 315 and 316 by a nut assembly. This installation method is not only firm and reliable, but also convenient for adjusting the position of the guide rod 32. The cross plate 33 is provided with a first groove 332 adapted to the upper end of the guide rod 32. When the upper end of the guide rod 32 is inserted and placed in the first groove 332, the cross plate 33 can be stably fixed on the guide rod 32. Such a structural design enables the entire support assembly 3 to effectively fix the motor 2 on the frame 1, while being adjustable to adapt to different frame structures and riding requirements.

[0039] In the bicycle mid-mounted motor installation and fixing device, the nut assembly plays a key fixing role. The nut assembly is mainly composed of a gasket 36 and a nut 35. Gaskets 36 and nuts 35 are provided at the upper and lower ends of the support ends 315 and 316. The nut 35 is threadedly connected to the guide rod 32. By tightening the nut 32, the gasket 36 on the guide rod 32 can be tightly locked on the support ends 315 and 316. Such an upper and lower locking method greatly ensures the position fixation of the guide rod 32. In actual use, this fixing method can ensure that the guide rod will not move, thereby making the entire device more stable and reliable. When the bicycle is traveling under different road conditions, whether it is a flat road or a rugged mountain road, the guide rod 32 can always remain in a fixed position to provide stable support for the motor 2. This design not only improves the safety and stability of the bicycle, but also extends the service life of the device. At the same time, the installation and adjustment of the nut assembly are also very convenient, and the user can easily adjust the position of the guide rod according to actual needs to achieve the best fixing effect.

[0040] In this embodiment, a second channel 314 is provided on the support member 31 between the two guide rods 32. A guide member 34 is installed in the second channel 314. The upper end of the guide member 34 is fixed on the cross plate 33. The application of the guide member can significantly improve the stability of the two guide rods 32 moving up and down. When the position of the motor 2 needs to be adjusted, the guide rod 32 moves up and down, and the guide member 34 can ensure that the movement of the guide rod 32 is more stable and accurate, avoiding shaking or offset.

[0041] There are many options for fixing the guide member 34 to the cross plate 33. First, the guide member 34 can be fixed to the cross plate 33 by welding, and welding can form a strong connection to ensure that it will not be easily separated during use. Second, a threaded locking method is adopted, which is convenient for installation and disassembly, and can also provide a reliable fixing effect. Third, the guide member 34 and the cross plate 33 can be integrally formed, which can maximize the rigid fixation of the guide member and the cross plate and improve the stability and durability of the entire device. Regardless of which fixing method is used, the purpose is to achieve a strong connection between the guide member and the cross plate, providing a more reliable guarantee for the installation and fixation of the bicycle mid-mounted motor.

[0042] In order to further improve the support stability of the support assembly 3, second grooves 311 and 312 are provided on the support ends 315 and 316 between the first channel 313 and the second channel 314. The thickness of the support end at the second grooves 311 and 312 is less than the thickness of the support end outside the second grooves. This structural difference enables the support end to provide an upward support force for the guide rod through the deformation of the second grooves 311 and 312 when subjected to force.

[0043] When the motor is working or the bicycle is traveling under different road conditions, the cross plate 33 needs to bear a certain amount of pressure. The design of the second grooves 311 and 312 can effectively transfer the supporting force to the guide rod 32, thereby making the support of the cross plate 33 more stable. This stable support can ensure that the motor 2 is installed more firmly and reliably on the frame 1, and reduce looseness or displacement caused by vibration or external force. At the same time, it can also improve the safety and stability of the bicycle during driving, allowing the rider to enjoy the fun of riding more assuredly.

[0044] Preferably, the second grooves 311 and 312 are distributed in pairs at the upper and lower ends of the support ends 315 and 316. Such a layout enables the support ends 315 and 316 to deform more evenly when subjected to force, thereby providing a more stable upward supporting force for the guide rod 32.

[0045] In this embodiment, the upper end surface of the cross plate 33 is an arc surface 331. When the cross plate 33 contacts the bottom bar 11 of the frame, the arc surface 331 can better fit the shape of the bottom bar 11, thereby greatly improving the stability of the contact between the cross plate 33 and the bottom bar 11. During the driving of the bicycle, whether it encounters bumpy road conditions or performs operations such as acceleration and deceleration, the cross plate 33 can be tightly combined with the bottom bar through the arc surface 331 to ensure that the position of the motor 2 on the frame 1 remains stable. This stable contact is not only conducive to improving the safety of riding, but also reduces the noise and wear caused by the shaking of the motor 2, and prolongs the service life of the motor 2 and the frame 1. At the same time, the design of the arc surface 331 also makes the entire device more beautiful and more coordinated with the overall shape of the bicycle.

[0046] When the motor 2 is installed on the bottom bracket, the line connecting the center point V of the motor 2 installed on the bottom bracket and the center point O of the motor head is used as the reference line M of the motor. In this embodiment, the support member 31 is a long handle support member. Figure 8 It can be seen that when the motor 2 is mounted on the frame 1, the swing position of the motor 2 is limited to a certain angle range. Taking the horizontal plane as the boundary, the upper angle a is 10° and the lower angle b is -25°. In other words, when the swing position range of the motor is between 10° and -25°, the long-handled support member of the present application can be used to effectively support the motor. This specific angle range is determined through careful design and testing. Within this range, the long-handled support member can give full play to its supporting role and ensure the stability of the motor on the frame. Example 2

[0047] This embodiment provides a bicycle mid-mounted motor installation and fixing device, the structure of which is as follows: Fig. 9 , Fig.10 The embodiment shown is substantially the same as the embodiment, including a frame 1 and a motor 2. The motor 2 is installed at the five-way pipe of the frame 1 through a pressure plate 21 and fixed with a locking member 22 to ensure that the motor has a certain stability in the initial installation state. A support assembly 3 is provided on the housing of the motor 2. The support assembly 4 has a support member 41. The support member 41 is provided with a guide rod 42 that can be adjusted up and down and can be locked and fixed. The upper end of the guide rod 42 is provided with a cross plate 43. When in use, the position of the guide rod 42 is adjusted so that the head of the motor 2 abuts against the inclined rod 12 of the frame and the upper end of the cross plate 43 abuts against the bottom rod 11 of the frame. Then, the guide rod 42 is fixed by a nut assembly similar to that of the embodiment 1, and the motor 2 is fixed to the frame 1.

[0048] The difference is that the support member 41 in this embodiment is a short-handled support member. Since the short-handled support member is shorter than the long-handled support member, the swing position range of the motor 2 is different from that of the embodiment 1. Fig.11As shown, when the motor 2 is installed on the five-way tube, the line connecting the center point V of the motor 2 installed on the five-way tube and the center point O of the motor head is used as the reference line M of the motor. The swing position of the motor 2 is limited to a certain angle range. With the horizontal plane as the boundary, the swing angle of the motor 2 is between angle a and angle b, where angle a is -25° and angle b is -60°. In other words, when the swing position range of the motor is between -25° and -60°, the short handle support member of the present application can be used to effectively support the motor. This specific angle range is determined through careful design and testing. Within this range, the short handle support member can give full play to its supporting role and ensure the stability of the motor on the frame.

[0049] Of course, the swing range of the motor is only a preferred range to meet most market needs. The swing range of the motor is not limited to -25° to -60°. As long as the support and guide rod length are changed, a larger angle range can be achieved.

[0050] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0051] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can be modified and varied in various ways, and can be applied not only to bicycle modification but also to tricycles, motorcycles, etc. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bicycle mid-mounted motor mounting and fixing device, comprising a frame and a motor, wherein the motor is mounted on the five-way pipe of the frame through a pressure plate and fixed with a locking member; characterized in that: A support assembly is provided on the housing of the motor, and a support member is provided on the support assembly. A guide rod which can be adjusted up and down and can be locked and fixed is provided on the support member, and a cross plate is provided on the upper end of the guide rod; by adjusting the position of the guide rod, the head of the motor can abut against the inclined rod of the frame and the upper end of the cross plate can abut against the bottom rod of the frame.

2. The bicycle mid-mounted motor mounting and fixing device according to claim 1, characterized in that: The support assembly includes a support member, one end of which is fixedly connected to the housing of the motor, the other end of which extends outward and is exposed outside the housing and has a support end extending to both sides, and the support end is provided with a first channel for placing a guide rod; the outer surface of the guide rod has an external thread and is installed on the support end through a nut assembly; the cross plate is provided with a first groove adapted to the upper end of the guide rod, and the upper end of the guide rod is inserted and placed in the first groove.

3. The bicycle mid-mounted motor mounting and fixing device according to claim 2, characterized in that: The nut assembly comprises a gasket and a nut. Gaskets and nuts are arranged at both upper and lower ends of the support end. The nut is threadedly connected to the guide rod and locks the gasket on the guide rod to the support end.

4. The bicycle mid-mounted motor mounting and fixing device according to claim 2, characterized in that: A second channel is arranged on the supporting member between the two guide rods, a guide member is arranged in the second channel, and the upper end of the guide member is fixed on the transverse plate.

5. The bicycle mid-mounted motor mounting and fixing device according to claim 4, characterized in that: A second groove is provided on the support end between the first channel and the second channel, and a thickness of the support end at the second groove is smaller than a thickness of the support end outside the second groove.

6. The bicycle mid-mounted motor mounting and fixing device according to claim 5, characterized in that: The second grooves are distributed in pairs at the upper and lower ends of the support end.

7. The bicycle mid-mounted motor mounting and fixing device according to any one of claims 1 to 6, characterized in that: The motor is installed on the five-way tube, and the line connecting the center point V of the motor installed on the five-way tube and the center point O of the motor head is used as the reference line M of the motor; when the motor is installed on the frame, the motor swings and adjusts its position based on the center point V according to the type of bracket.

8. The bicycle mid-mounted motor mounting and fixing device according to claim 7, characterized in that: When the support member is a short-handled support member, the swing position range of the motor is between -25° and -60°.

9. The bicycle mid-mounted motor mounting and fixing device according to claim 7, characterized in that: When the support member is a long-handled support member, the swing position range of the motor is between 10° and -25°.

10. The bicycle mid-mounted motor mounting and fixing device according to claim 8 or 9, characterized in that: The upper end surface of the horizontal plate is an arc-shaped curved surface.

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