Quick release structure of hub motor

Abstract

The utility model discloses a quick release structure of a hub motor, which comprises the hub motor and a rear fork connected with a motor shaft of the hub motor, a hollow concentric channel is arranged in the motor shaft, and two ends of the motor shaft are respectively provided with a first limit structure; the rear bottom fork is provided with two connecting ends, the two connecting ends are connected with the end faces of the two ends of the motor shaft respectively to limit the motor shaft to move in the axial direction, and a second limiting structure is arranged at the connecting position. The first limiting structure and the second limiting structure are matched to limit the motor shaft to rotate in the circumferential direction; the quick-release structure further comprises a quick-release shaft, the middle section of the quick-release shaft is located in the concentric channel, and the two ends of the quick-release shaft are connected with the two connecting ends of the rear fork respectively to limit the motor shaft to move in the radial direction. And the quick-release shaft directly penetrates through the center of the motor shaft and is matched with the rear fork to fix the hub motor, so that the quick-release shaft can be quickly detached and replaced during maintenance. The defect that a thread structure is directly arranged on a motor shaft in a traditional connecting structure, and thread loosening is prone to occurring can be overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheel hub motor, especially a quick release structure of wheel hub motor. BACKGROUND

[0002] As an environmental protection, convenient traffic tool, the performance and reliability of the core power source - wheel hub motor of electric two-wheeled vehicle directly determine the overall operation effect and service life of the vehicle. At present, the electric two-wheeled vehicle driving motor assembly mode on the market is that the motor shaft both ends are provided with external threads, the external thread section is milled out anti-rotation flat position, and the anti-rotation flat position is matched with anti-rotation sheet to prevent motor stator rotation, the anti-rotation sheet is fixed on the electric vehicle rear flat fork with screw and clamping groove, and the installation steps are as follows: after the motor both ends are sleeved with anti-rotation sheet, the motor is pushed into the rear flat fork, the position is adjusted, the anti-rotation sheet is fixed with left and right two small screws, finally, two large nuts are screwed on the shaft end thread, and then the motor shaft and the rear flat fork are locked, and the installation is completed.

[0003] But this installation mode is prone to the following problems in the installation process: 1) the thread of the motor shaft end is prone to tooth slipping phenomenon, 2) the wheel hub motor is relatively cumbersome during installation or disassembly and maintenance, and therefore improvement is required. SUMMARY

[0004] The utility model discloses a wheel hub motor's motor shaft end thread is prone to tooth slipping and inconvenient to install or dismount and other defects in prior art, and provides a new quick release structure of wheel hub motor.

[0005] In order to solve the above technical problem, the utility model realizes through the following technical scheme:

[0006] A quick release structure of wheel hub motor, including wheel hub motor and the rear flat fork connected with the motor shaft of wheel hub motor,

[0007] The hollow concentric channel is arranged in the motor shaft, and the first limiting structure is arranged at the two ends of the motor shaft respectively.

[0008] The rear flat fork has two connecting ends, and the two connecting ends are connected with the end faces of the two ends of the motor shaft respectively, to limit the axial movement of the motor shaft, and the second limiting structure is arranged at the connecting place.

[0009] The first limiting structure and the second limiting structure cooperate to limit the circumferential rotation of the motor shaft.

[0010] The quick release structure further includes a quick release shaft, the middle section of the quick release shaft is located in the concentric channel, and the two ends of the quick release shaft are connected with the two connecting ends of the rear flat fork respectively, to limit the radial movement of the motor shaft.

[0011] In the scheme, the quick release shaft directly passes through the center of the motor shaft and cooperates with the rear fork to fix the hub motor, which can quickly disassemble and replace during maintenance.

[0012] As preferred, the second limiting structure of the quick release structure of the hub motor is recessed on the side away from the motor shaft, and the first limiting structure is inserted into the second limiting structure to form the engagement state of limiting the circumferential rotation of the motor shaft.

[0013] As preferred, the second limiting structure of the quick release structure of the hub motor includes a bottom wall acting on the end face of the motor shaft and a side wall cooperating with the first limiting structure to form the engagement state.

[0014] As preferred, the side wall of the second limiting structure of the quick release structure of the hub motor extends to form a sliding groove for guiding; one end of the sliding groove is an open end for the end of the motor shaft to pass through, and the other end is a closed end.

[0015] As preferred, the first limiting structure of the quick release structure of the hub motor includes a first contact surface and a second contact surface recessed inward along the outer periphery of the motor shaft, and the first contact surface and the second contact surface are adapted to the side wall of the sliding groove and abut against the side wall of the sliding groove when the motor shaft has a rotation tendency, thereby forming the engagement state.

[0016] As preferred, the closed end of the sliding groove of the quick release structure of the hub motor is provided with a through hole for the quick release shaft to pass through, and the quick release shaft passes through the through hole and enters the concentric channel of the motor shaft.

[0017] As preferred, the quick release shaft of the quick release structure of the hub motor is provided with a threaded structure at both ends for cooperating with a nut, and is locked from the outside of the two connecting ends towards the motor shaft.

[0018] As preferred, the quick release shaft of the quick release structure of the hub motor is a bolt structure, one end of which is a nut, and the other end has a threaded structure.

[0019] Two through holes are located on the rear fork, one of which is a threaded hole with internal threads.

[0020] One end of the quick release shaft acts on the outside of one connecting end through a nut, and the other end is locked with the threaded hole of the other connecting end through a threaded structure.

[0021] The improved structure has the following advantages:

[0022] The application has the advantages of quick disassembly relative to the connection structure of a traditional hub motor and a rear fork. The motor shaft and the rear fork are preliminarily fixed in a detachable manner through engagement, and are further fixed by a quick-release shaft, so that the defect that a threaded structure is directly arranged on the motor shaft in the traditional connection structure and is easy to slip can be overcome. The quick-release shaft is replaced to avoid the overall replacement of the motor shaft. Meanwhile, in the scheme, the quick-release shaft directly penetrates the center of the motor shaft and cooperates with the rear fork to fix the hub motor, so that the effect of quick disassembly and replacement during maintenance can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a longitudinal section structure schematic view of the hub motor and the rear fork after installation of the utility model;

[0024] Figure 2 is a three-dimensional structure schematic view of the rear fork of the utility model;

[0025] Figure 3 is a three-dimensional structure schematic view of the quick-release shaft and the motor shaft of the utility model;

[0026] Figure 4 is a three-dimensional structure schematic view of the quick-release shaft and the motor shaft of the utility model; Figure 1 is a partial enlarged view of A in the utility model.

[0027] Reference numeral: 1, hub motor; 2, rear fork; 111, concentric channel; 22, connecting end; 3, first limiting structure; 21, second limiting structure; 4, quick-release shaft; 211, sliding groove; 11, motor shaft; 31, first contact surface; 32, second contact surface; 2111, through hole. DETAILED DESCRIPTION

[0028] The utility model will be further described in detail below in combination with the drawings and the specific embodiments, but they are not limitations on the utility model: Figures 1-4 EMBODIMENT

[0029] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 A quick-release structure of a hub motor, comprising a hub motor 1 and a rear fork 2 connected with a motor shaft 11 of the hub motor 1,

[0030] A hollow concentric channel 111 is formed in the motor shaft 11, and first limiting structures 3 are arranged at both ends of the motor shaft 11;

[0031] ​The rear fork 2 has two connecting ends 22, and the two connecting ends 22 are connected with the end faces of the two ends of the motor shaft 11 respectively, limiting the axial movement of the motor shaft 11, and a second limiting structure 21 is arranged at the connecting position;

[0032] The first limiting structure 3 cooperates with the second limiting structure 21 to limit the circumferential rotation of the motor shaft 11;

[0033] The quick release structure further comprises a quick release shaft 4, the middle section of the quick release shaft 4 is located in the concentric channel 111, and the two ends of the quick release shaft 4 are connected with the two connecting ends 22 of the rear fork 2 respectively, limiting the radial movement of the motor shaft 11.

[0034] As a preferred, the second limiting structure 21 is recessed from the side of the connecting end 22 away from the motor shaft 11, and the first limiting structure 3 is inserted into the second limiting structure 21 to form the engagement state limiting the circumferential rotation of the motor shaft 11.

[0035] As a preferred, the second limiting structure 21 comprises a bottom wall acting on the end face of the motor shaft 11, and a side wall cooperating with the first limiting structure 3, and the side wall cooperates with the first limiting structure 3 to form the engagement state.

[0036] As a preferred, the side wall of the second limiting structure 21 extends to form a guide chute 211; one end of the guide chute 211 is an open end for the end of the motor shaft 11 to pass through, and the other end is a closed end.

[0037] As a preferred, the first limiting structure 3 comprises a first contact surface 31 and a second contact surface 32 recessed inward along the outer periphery of the motor shaft 11, and the first contact surface 31 and the second contact surface 32 are adapted to the side wall of the guide chute 211 and abut against the side wall of the guide chute 211 when the motor shaft 11 has a rotation tendency, thereby forming the engagement state.

[0038] Specifically, in the above structure, the side wall of the guide chute 211 is located at the upper end and the lower end of the guide chute 211, and when the motor shaft 11 has a rotation tendency, the first contact surface 31 abuts against the upper end of the guide chute 211, and the second contact surface 32 abuts against the lower end of the guide chute 211, thereby forming the engagement state.

[0039] As a preferred, the closed end of the guide chute 211 is provided with a through hole 2111 for the quick release shaft 4 to pass through, and the quick release shaft 4 penetrates into the concentric channel 111 of the motor shaft 11 through the through hole 2111.

[0040] As a preferred, the quick release shaft 4 is a bolt structure, one end of which is a nut, and the other end has a threaded structure;

[0041] Two through holes 2111 are located on the rear fork 2, one of which is a threaded hole with internal threads;

[0042] One end of the quick release shaft 4 is connected to the outer side of one of the connecting ends 22 by a nut, and the other end is locked to the threaded hole of the other connecting end 22 by a threaded structure.

[0043] Specifically, in the implementation process, the quick release shaft 4 passes through the through hole 2111 and the concentric channel 111 in turn, then the nut of the quick release shaft 4 is rotated to lock the threaded end of the quick release shaft 4 with the threaded hole with internal threads in the through hole 2111, and the hub motor 1 is installed.

[0044] In another embodiment of the application, the two ends of the quick release shaft 4 are provided with threaded structures for cooperation with nuts to lock from the outer side of the two connecting ends 22 towards the motor shaft 11.

[0045] Specifically, in the implementation process, the quick release shaft 4 is inserted into the concentric channel 111, and the two ends of the quick release shaft 4 are respectively inserted from the through hole 2111 of the rear fork 2, and then the nuts are used for cooperation and locking, so that the hub motor 1 is installed.

[0046] In summary, the above only describes the preferred embodiments of the application, and any changes and modifications made within the scope of the application for patent shall be included in the scope of the application.

Claims

1. A quick release structure of an in-wheel motor, comprising an in-wheel motor (1) and a rear fork (2) connected with a motor shaft (11) of the in-wheel motor (1), characterized in that: a hollow concentric channel (111) is formed in the motor shaft (11), and a first limiting structure (3) is arranged at each end of the motor shaft (11); the rear fork (2) has two connecting ends (22) connected with the end faces of the two ends of the motor shaft (11) respectively, limiting the axial movement of the motor shaft (11), and a second limiting structure (21) is arranged at the connecting position; the first limiting structure (3) cooperates with the second limiting structure (21) to limit the circumferential rotation of the motor shaft (11); the quick release structure further comprises a quick release shaft (4), the middle section of the quick release shaft (4) is located in the concentric channel (111), and the two ends of the quick release shaft (4) are connected with the two connecting ends (22) of the rear fork (2) respectively, limiting the radial movement of the motor shaft (11). The second limiting structure (21) is formed by recessing the connecting end (22) towards the side away from the motor shaft (11), and the first limiting structure (3) is inserted into the second limiting structure (21) to form an engagement state limiting the circumferential rotation of the motor shaft (11). The second limiting structure (21) comprises a bottom wall acting on the end face of the motor shaft (11), and a side wall cooperating with the first limiting structure (3) to form the engagement state. The side wall of the second limiting structure (21) extends to form a guide chute (211); one end of the chute (211) is an open end for the end of the motor shaft (11) to pass through, and the other end is a closed end. The first limiting structure (3) comprises a first contact surface (31) and a second contact surface (32) recessed inward along the outer periphery of the motor shaft (11), and the first contact surface (31) and the second contact surface (32) are adapted to the side wall of the chute (211) and abut against the side wall of the chute (211) when the motor shaft (11) has a tendency to rotate, forming the engagement state.

2. The quick release structure of a wheel hub motor according to claim 1, characterized in that: The closed end of the chute (211) is provided with a through hole (2111) for the quick release shaft (4) to pass through, and the quick release shaft (4) penetrates into the concentric channel (111) of the motor shaft (11) through the through hole (2111).

3. The quick release structure of a wheel hub motor according to claim 2, characterized in that: The two ends of the quick release shaft (4) are provided with threaded structures for cooperating with nuts to lock towards the motor shaft (11) from the outside of the two connecting ends (22).

4. The quick release structure of a wheel hub motor according to claim 3, characterized in that: The quick release shaft (4) is a bolt structure, one end of which is a nut, and the other end has a threaded structure; 5. The quick release structure of a wheel hub motor according to claim 4, characterized in that: Two through holes (2111) are arranged on the rear fork (2), one of which is a threaded hole with internal threads; 6. The quick release structure of a wheel hub motor according to claim 5, characterized in that: One end of the quick release shaft (4) acts on the outside of one connecting end (22) through a nut, and the other end is locked with the threaded hole of the other connecting end (22) through the threaded structure.

7. The quick release structure of a wheel hub motor according to claim 6, characterized in that: ​ 8. The quick release structure of a wheel hub motor according to claim 6, characterized in that: ​ ​ ​

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