Middle motor hanger of electric bicycle

Abstract

The utility model relates to a middle motor hanging frame of an electric bicycle. Comprising a hanger body, the bottom of the hanger body is provided with a notch used for containing the upper portion of the middle motor, the left side of the bottom of the hanger body is provided with a plurality of left side lug plates, left side assembling holes are formed in the left side lug plates, and a plurality of right side assembling holes are formed in the corresponding positions of the right side of the bottom of the hanger body; the middle motor is fixed through bolts located in the left side assembling holes and the right side assembling holes of each group. A front base which is integrally formed and used for being connected with a front beam is arranged on the front portion of the hanging frame body, a top base which is integrally formed and used for being connected with a seat tube is arranged on the top of the hanging frame body, and a left side fork arm and a right side fork arm which are integrally formed and used for being connected with a bottom fork are arranged on the two sides of the rear portion of the hanging frame body respectively. The utility model provides the centrally-mounted motor hanger of the electric bicycle, the overall structural strength is high, the dimensional accuracy is easy to ensure after the centrally-mounted motor hanger is fixedly connected with a frame pipe, and the transmission effect and the like are ensured while the overall structural strength of the bicycle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycle structures, and in particular relates to a central motor hanger of an electric bicycle. Background Art

[0002] Bicycles are one of the most commonly used means of transportation. In terms of structure, bicycles are composed of a frame, a seat assembly, a handlebar assembly, and front and rear wheels. With the development of technology, electric bicycles are playing an increasingly important role in people's lives. For electric bicycles, their drive forms can be divided into two forms: hub motor drive and mid-mounted motor drive. For the mid-mounted motor drive type, a motor hanger needs to be set at the bottom of the middle part of the bicycle frame. The function of the motor hanger is to install and fix the mid-mounted motor. It is necessary not only to ensure the strength of the mid-mounted motor installation and fixation, but also to ensure the installation position accuracy.

[0003] The existing center motor bracket is usually processed and formed in one piece by a machining center, and then welded to the various pipes of the frame. The above structure has the following defects: it is not easy to ensure the position accuracy of the processed center motor bracket when it is welded to other pipes of the frame. At the same time, factors such as welding quality may also easily lead to insufficient structural strength of the center motor installation position. The above position accuracy problem will further lead to problems in vehicle transmission and other aspects. The above structural strength problem will lead to problems in the overall structural strength of the electric bicycle. In summary, it is necessary to develop and design a new type of center motor bracket to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a mid-mounted motor hanger for an electric bicycle, which has a high overall structural strength and is easy to ensure dimensional accuracy after being fixedly connected to the frame pipe, thereby improving the overall structural strength of the bicycle while ensuring transmission effects.

[0005] The technical solution adopted by the utility model is: a mid-mounted motor bracket of an electric bicycle, comprising a bracket body, a notch for accommodating the upper part of the mid-mounted motor is provided at the bottom of the bracket body, a plurality of left ear plates are provided on the left side of the bottom of the bracket body and a left assembly hole is provided on each left ear plate, a plurality of right assembly holes are provided at corresponding positions on the right side of the bottom of the bracket body, and the mid-mounted motor is fixed by bolts located in each group of left assembly holes and right assembly holes; an integrally formed front base for connecting to a front beam is provided at the front of the bracket body, an integrally formed top base for connecting to a seat tube is provided at the top of the bracket body, and an integrally formed left fork arm and a right fork arm for connecting to a flat fork are respectively provided on both sides of the rear of the bracket body.

[0006] Preferably, the left wall bottom profile and the right wall bottom profile of the bottom notch of the bracket body are consistent with the top left profile and the top right profile of the central motor.

[0007] Preferably, a front connecting portion extending forward is provided at the front end of the front base, a top connecting portion extending upward is provided at the upper end of the top base, a left fork arm connecting portion extending backward is provided at the rear end of the left fork arm, and a right fork arm connecting portion extending backward is provided at the rear end of the right fork arm.

[0008] Preferably, a plurality of positioning blocks are respectively provided on the outer wall of the front connecting portion, the outer wall of the top connecting portion, the outer wall of the left fork arm connecting portion and the outer wall of the right fork arm connecting portion.

[0009] Preferably, a decorative cover is also included, a plurality of connecting holes are provided on the left wall of the bracket body, and mounting holes are provided at corresponding positions of the top edge of the decorative cover. The decorative cover is fixedly connected to the bracket body by screws located in the connecting holes and the mounting holes, and the contour of the bottom edge of the decorative cover is consistent with the left contour of the central motor.

[0010] The advantages and positive effects of the utility model are:

[0011] The utility model provides a central motor bracket for an electric bicycle. Compared with the existing central motor bracket, the central motor bracket of the utility model reserves a central motor installation position at the bottom of the bracket body and uses bolts to combine the central motor with the central motor bracket at multiple points, thereby ensuring the installation structural strength of the central motor. The central motor bracket is provided with an integrally formed front base at the front of the bracket body, an integrally formed top base at the top, and an integrally formed left fork arm and right fork arm at the rear, so that the central motor bracket is easy to dock and connect with the front beam, seat tube and flat fork of the frame.

[0012] Since the front base, the top base, the left fork arm and the right fork arm are all formed integrally with the bracket body by fine machining, and the front beam is butt-connected to the front base, the seat tube is butt-connected to the top base, and the flat fork is butt-connected to the left fork arm and the right fork arm, the position accuracy of the assembly connection between the frame pipes and the mid-mounted motor bracket can be well guaranteed. At the same time, compared with the existing structure spliced ​​by welding, the one-piece mid-mounted motor bracket has higher structural strength, which can further improve the installation effect of the mid-mounted motor, improve the overall structural strength of the bicycle while ensuring transmission and other effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model, from the upper perspective;

[0014] Figure 2 It is a schematic diagram of the structure of the utility model, from the lower left side perspective;

[0015] Figure 3It is a schematic diagram of the structure of the utility model, from the right side of the lower part;

[0016] Figure 4 It is a schematic diagram of the application state structure of the utility model.

[0017] In the figure:

[0018] 1. Bracket body; 2. Front base; 3. Front connection; 4. Decorative cover; 5. Top base; 6. Top connection; 7. Left fork arm; 8. Left fork arm connection; 9. Right fork arm; 10. Right fork arm connection; 11. Right assembly hole; 12. Left assembly hole; 13. Left ear plate; 14. Connection hole; 15. Front beam; 16. Mid-mounted motor; 17. Seat tube; 18. Flat fork. DETAILED DESCRIPTION

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are given to explain in detail.

[0020] See also Figure 1 , Figure 2 and Figure 3 The mid-mounted motor bracket of the electric bicycle of the utility model comprises a bracket body 1, and a notch for accommodating the upper part of the mid-mounted motor 16 is provided at the bottom of the bracket body 1. During assembly, the mid-mounted motor 16 is placed below the bracket body 1 and embedded in the bottom notch, so that the mid-mounted motor 16 can be combined with the mid-mounted motor bracket as a whole.

[0021] A plurality of left side ear plates 13 are provided on the left side of the bottom of the bracket body 1 and a left side assembly hole 12 is provided on each left side ear plate 13. A plurality of right side assembly holes 11 are provided at corresponding positions on the right side of the bottom of the bracket body 1. The central motor 16 is fixed by bolts located in each group of left side assembly holes 12 and right side assembly holes 11.

[0022] As shown in the figure, three groups of left assembly holes 12 and right assembly holes 11 are set at the bottom of the bracket body 1, so the middle motor 16 is fixedly connected to the middle motor bracket by three bolts. In fact, three mounting holes are reserved at the top of the casing of the middle motor 16. When assembling, the top of the middle motor 16 is embedded in the bottom notch of the bracket body 1, so that the three mounting holes on the casing are horizontally aligned with the three groups of left assembly holes 12 and right assembly holes 11, and three bolts are inserted and fastened.

[0023] In this embodiment, the bottom contour of the left wall and the bottom contour of the right wall of the bottom notch of the bracket body 1 are consistent with the top left contour and the top right contour of the center motor 16, so that when the top of the center motor 16 is embedded in the bottom groove, its casing can be well combined with the bottom of the bracket body 1. In addition, due to the consistency of the contours, the bottom notch also has a positioning function for the center motor 16, that is, when the top of the casing of the center motor 16 is well embedded in the bottom notch, the aforementioned three mounting holes are horizontally aligned with the three groups of left assembly holes 12 and right assembly holes 11.

[0024] An integral front base 2 for connecting the front beam 15 is provided at the front of the bracket body 1, an integral top base 5 for connecting the seat tube 17 is provided at the top of the bracket body 1, and an integral left fork arm 7 and a right fork arm 9 for connecting the flat fork 18 are provided on both sides of the rear of the bracket body 1.

[0025] like Figure 4 As shown in , the front base 2 is butt-jointed with the lower end of the front beam 15 , the top base 5 is butt-jointed with the lower end of the seat tube 17 , and the left fork arm 7 and the right fork arm 9 are butt-jointed with the front end of the flat fork 18 .

[0026] In this embodiment, a front connecting portion 3 extending forward is provided at the front end of the front base 2, a top connecting portion 6 extending upward is provided at the upper end of the top base 5, a left fork arm connecting portion 8 extending backward is provided at the rear end of the left fork arm 7, and a right fork arm connecting portion 10 extending backward is provided at the rear end of the right fork arm 9. Figure 4 During assembly, the front connection portion 3 is inserted into the lower end of the front beam 15 , the top connection portion 6 is inserted into the lower end of the seat tube 17 , and the left and right fork arm connection portions 8 and 10 are both inserted into the front end of the flat fork 18 .

[0027] In this embodiment, a plurality of positioning blocks are provided on the outer wall of the front connecting portion 3, the outer wall of the top connecting portion 6, the outer wall of the left fork arm connecting portion 8 and the outer wall of the right fork arm connecting portion 10. The positioning blocks are combined with the positioning grooves at the port positions of the front beam 15, the seat tube 17 and the flat fork 18 to ensure the accuracy of the position and improve the structural strength of the welding connection.

[0028] It also includes a decorative cover 4, a plurality of connection holes 14 are provided on the left wall of the rack body 1, a mounting hole is provided at a corresponding position of the top edge of the decorative cover 4, the decorative cover 4 is fixedly connected to the rack body 1 by screws located in the connection holes 14 and the mounting holes, and the contour of the bottom edge of the decorative cover 4 is consistent with the left contour of the middle motor 16. The purpose of setting the decorative cover 4 is to close the position where the left side of the middle motor 16 is combined with the rack body 1, so as to improve the appearance.

[0029] For assembly with other frame components, please refer to Figure 4 :

[0030] The lower end of the front beam 15 of the frame is plug-connected and welded to the front connection part 3 of the front base 2, the lower end of the seat tube 17 of the frame is plug-connected and welded to the top connection part 6 of the top base 5, the front end of the flat fork 18 of the frame is plug-connected and welded to the left fork arm connection part 8 and the right fork arm connection part 10 of the left fork arm 7 and the right fork arm 9; the upper part of the mid-mounted motor 16 is embedded in the bottom notch of the bracket body 1, and the front, middle and rear bolts are inserted to fix the mid-mounted motor 16 to the bracket body 1, and then the decorative cover 4 is installed.

Claims

1. A mid-mounted motor rack for an electric bicycle, characterized in that: The invention comprises a rack body (1), wherein a notch for accommodating the upper part of a middle motor (16) is provided at the bottom of the rack body (1), a plurality of left ear plates (13) are provided at the left side of the bottom of the rack body (1), and a left assembly hole (12) is provided on each left ear plate (13), and a plurality of right assembly holes (11) are provided at corresponding positions on the right side of the bottom of the rack body (1), and the middle motor (16) is fixed by bolts located in each group of left assembly holes (12) and right assembly holes (11); an integrally formed front base (2) for connecting to a front beam (15) is provided at the front of the rack body (1), an integrally formed top base (5) for connecting to a seat tube (17) is provided at the top of the rack body (1), and an integrally formed left fork arm (7) and a right fork arm (9) for connecting to a flat fork (18) are provided on both sides of the rear of the rack body (1).

2. The mid-mounted motor bracket for an electric bicycle as claimed in claim 1, characterized in that: The left wall bottom profile and the right wall bottom profile of the bottom notch of the rack body (1) are consistent with the top left side profile and the top right side profile of the central motor (16).

3. The mid-mounted motor bracket for an electric bicycle as claimed in claim 2, characterized in that: A front connecting portion (3) extending forward is provided at the front end of the front base (2), a top connecting portion (6) extending upward is provided at the upper end of the top base (5), a left fork arm connecting portion (8) extending backward is provided at the rear end of the left fork arm (7), and a right fork arm connecting portion (10) extending backward is provided at the rear end of the right fork arm (9).

4. The mid-mounted motor bracket for an electric bicycle as claimed in claim 3, characterized in that: A plurality of positioning blocks are respectively provided on the outer wall of the front connecting portion (3), the outer wall of the top connecting portion (6), the outer wall of the left fork arm connecting portion (8) and the outer wall of the right fork arm connecting portion (10).

5. The mid-mounted motor bracket for an electric bicycle according to any one of claims 1 to 4, characterized in that: The invention also comprises a decorative cover (4), a plurality of connection holes (14) are provided on the left wall of the bracket body (1), a mounting hole is provided at a corresponding position of the top edge of the decorative cover (4), the decorative cover (4) is fixedly connected to the bracket body (1) by screws located in the connection holes (14) and the mounting holes, and the contour of the bottom edge of the decorative cover (4) is consistent with the left contour of the central motor (16).

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