Hub motor

Abstract

The utility model discloses a wheel hub motor, which comprises a driving mechanism, a speed reducing mechanism and a wheel hub, the driving mechanism comprises a motor stator and a motor rotor which are matched with each other, the motor rotor is provided with a motor rotating shaft, and the motor rotating shaft is provided with a gear part; the speed reducing mechanism comprises a planetary gear set, an inner gear ring and a planetary gear fixing cover, the planetary gear set comprises a planetary gear, the planetary gear is provided with a first section of gear and a second section of gear which are coaxially arranged, the first section of gear is connected with the gear part in a meshed mode, the second section of gear is connected with the inner gear ring in a meshed mode, and the planetary gear fixing cover is connected with the planetary gear. The planetary gear fixing cover is mounted on a motor stator, and the planetary gear is rotatably supported between the motor stator and the planetary gear fixing cover; the hub is fixedly connected with the inner gear ring, and the hub is connected to the planetary gear fixing cover in a rotating mode. The driving mechanism, the speed reducing mechanism and the hub are integrally arranged, the structure is compact, more integration is achieved, and use is convenient.

Description

Technical Field

[0001] The utility model relates to a wheel hub motor, belonging to the technical field of wheelchair and scooter motors. Background Art

[0002] At present, wheelchairs and mobility scooters for the elderly have higher requirements for motors. However, the existing motors and wheel hubs are generally designed separately, connected by a transmission device in the middle, with a large span and poor integrity, and also increase their own weight. For example, the Chinese patent with the authorization announcement number CN207195582U discloses a planetary reduction mechanism for electric wheelchairs. Although the brushless motor is connected to the reduction mechanism as a whole, it is still designed separately from the wheel hub, and the reduction mechanism design is also relatively lengthy and the structure is not compact enough. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a hub motor, which integrates a driving mechanism, a reduction mechanism and a hub, has a compact structure, is more integrated and is easy to use.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a hub motor, comprising:

[0005] A driving mechanism, the driving mechanism comprising a motor stator and a motor rotor which are arranged in a coordinated manner, the motor rotor having a motor shaft, and a gear portion being arranged on the motor shaft;

[0006] A reduction mechanism, the reduction mechanism comprising a planetary gear set, an inner gear ring and a planetary gear fixing cover, the planetary gear set comprising planetary gears, the planetary gears having a first section gear and a second section gear coaxially arranged, the first section gears are meshed and connected with the gear portion, the second section gears are meshed and connected with the inner gear ring, the planetary gear fixing cover is mounted on the motor stator, and the planetary gears are rotatably supported between the motor stator and the planetary gear fixing cover;

[0007] A wheel hub is fixedly connected to the inner gear ring, and the wheel hub is rotatably connected to the planetary gear fixing cover.

[0008] Furthermore, a specific structure of a motor stator is provided, wherein the motor stator comprises a motor coil, a driving front end cover and a driving rear end cover, wherein the driving front end cover and the driving rear end cover are connected together, the motor coil is arranged in the driving rear end cover, and the motor rotor is located in the middle of the motor coil.

[0009] Furthermore, a first bearing and a second bearing are respectively installed at both ends of the motor shaft, and the motor shaft is rotatably connected to the rear drive cover via the first bearing, and the motor shaft is rotatably connected to the front drive cover via the second bearing.

[0010] Furthermore, the driving front end cover is provided with a positioning shaft corresponding to the planetary gear, and the planetary gear is rotatably connected to the corresponding positioning shaft.

[0011] Furthermore, in order to realize convenient and rapid installation of the hub motor and the wheelchair, a T-shaped block for connecting the wheelchair is provided on the motor stator; L-shaped slots are also provided on both sides of the T-shaped block.

[0012] Furthermore, involute helical teeth are evenly distributed on the outer wall of the gear portion.

[0013] Furthermore, the planetary gear fixing cover is provided with a hub locking shaft and / or a rotationally supported outer ring, and the hub is rotationally connected to the hub locking shaft and / or the rotationally supported outer ring.

[0014] Furthermore, the wheel hub comprises a wheel hub inner portion and a wheel hub outer portion which are fixedly connected together.

[0015] Furthermore, the motor stator is equipped with an electromagnetic brake for braking the motor shaft.

[0016] After adopting the above technical solution, the utility model installs the planetary gear fixing cover in the reduction mechanism on the motor stator, rotatably supports the planetary gear between the motor stator and the planetary gear fixing cover, and rotatably connects the wheel hub to the planetary gear fixing cover, and fixedly connects the wheel hub to the inner gear ring. Such a design integrates the drive mechanism, the reduction mechanism and the wheel hub, has a compact structure, is more integrated, and is easy to use.

[0017] In addition, the utility model integrates the electromagnetic brake on the motor stator, and brakes the motor shaft through the electromagnetic brake, which has better integration effect and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the hub motor of the utility model;

[0019] Figure 2 This is a structural cross-sectional view of the hub motor of the utility model;

[0020] Figure 3 A partial schematic diagram of the driving mechanism of the utility model Figure 1 ;

[0021] Figure 4 A partial schematic diagram of the driving mechanism of the utility model Figure 2 ;

[0022] Figure 5 It is a structural schematic diagram of the speed reduction mechanism of the utility model;

[0023] Figure 6 This is a schematic diagram of the connection between the inner gear ring and the wheel hub of the utility model;

[0024] Figure 7 It is a schematic diagram of the meshing of the planetary gears of the utility model;

[0025] Figure 8 It is an exploded view of the assembly of the hub motor of the utility model;

[0026] Fig. 9 It is a schematic diagram of the connection between the wheel hub motor and the motor fixing block of the utility model;

[0027] Fig.10 It is a cross-sectional view of the connection between the wheel hub motor and the motor fixing block of the utility model;

[0028] Fig.11 It is an exploded view of the connection between the wheel hub motor and the motor fixing block of the utility model;

[0029] Fig.12 This is a schematic diagram of the installation of the hub motor of the utility model. DETAILED DESCRIPTION

[0030] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0031] like Figures 1 to 12 As shown, a wheel hub motor comprises:

[0032] The driving mechanism comprises a motor stator 1 and a motor rotor 2 which are arranged in a coordinated manner. The motor rotor 2 has a motor shaft 21 on which a gear portion 21a is provided.

[0033] The reduction mechanism includes a planetary gear set, an inner gear ring 31 and a planetary gear fixing cover 32. The planetary gear set includes a planetary gear 33. The planetary gear 33 has a first section gear 33a and a second section gear 33b which are coaxially arranged. The first section gear 33a is meshed and connected with the gear portion 21a, and the second section gear 33b is meshed and connected with the inner gear ring 31. The planetary gear fixing cover 32 is installed on the motor stator 1, and the planetary gear 33 is rotatably supported between the motor stator 1 and the planetary gear fixing cover 32.

[0034] The wheel hub 4 is fixedly connected to the inner gear ring 31 , and the wheel hub 4 is rotatably connected to the planetary gear fixing cover 32 .

[0035] In this embodiment, the driving mechanism is started, the motor rotor 2 rotates, the motor shaft 21 rotates, the gear portion 21 a rotates, thereby driving the planetary gear 33 to rotate, driving the inner gear ring 31 to rotate, and thus driving the wheel hub 4 to rotate.

[0036] In the present embodiment, three planetary gears 33 are provided, but the present invention is not limited thereto.

[0037] Specifically, Figure 2 As shown, the wheel hub 4 is provided with an inner gear ring mounting groove, and the inner gear ring 31 is installed in the inner gear ring mounting groove.

[0038] In this embodiment, if Figure 1 , 2 As shown, the motor stator 1 includes a motor coil 11, a driving front end cover 12 and a driving rear end cover 13. The driving front end cover 12 and the driving rear end cover 13 are connected together, the motor coil 11 is arranged in the driving rear end cover 13, and the motor rotor 2 is located in the middle of the motor coil 11.

[0039] In this embodiment, a device for collecting the rotation speed of the motor shaft 21, that is, the rotation speed of the hub motor, is provided between the motor shaft 21 and the motor stator 1. Specifically, a Hall plate 10 is provided on the rear driving cover 13 of the motor stator 1, and the Hall plate 10 cooperates with the motor shaft 21.

[0040] In this embodiment, a concave-convex platform is provided on the rear end cover of the driving unit, and the motor coil 11 is embedded on the concave-convex platform.

[0041] In this embodiment, if Figure 2 As shown, the first bearing 5 and the second bearing 6 are respectively installed at both ends of the motor shaft 21. The motor shaft 21 is rotatably connected to the rear driving cover 13 through the first bearing 5, and the motor shaft 21 is rotatably connected to the front driving cover 12 through the second bearing 6.

[0042] Specifically, Figure 5 As shown, the driving front end cover 12 is provided with a positioning shaft 12 a corresponding to the planetary gear 33 , and the planetary gear 33 is rotatably connected to the corresponding positioning shaft 12 a ; in addition, the positioning shaft 12 a is also connected to the planetary gear fixing cover 32 .

[0043] Specifically, Figure 5 , 9As shown in Figures 1 to 12, a T-shaped block 14 for connecting a wheelchair is provided on the motor stator 1. Specifically, a base 17 is provided on the front end cover 12 of the motor stator 1, and the base 17 is provided with a connecting rib extending downward, and a clamping seat is provided at the bottom end of the connecting rib, and the connecting rib and the clamping seat are connected to form a T-shaped block 14, and L-shaped clamping grooves 14a are also provided on both sides of the T-shaped block 14, so that the hub motor can be quickly connected to the frame of the wheelchair through the T-shaped block 14 and the clamping groove 14a; specifically, the frame of the wheelchair has a motor fixing block 15 and a hub connecting frame 16 connected to the motor fixing block 15, and the motor fixing block 15 includes a T-shaped clamping groove 15a located in the middle and L-shaped clamping blocks 15b formed on both sides of the T-shaped clamping groove 15a, and the L-shaped clamping block 15b is inserted into the clamping groove 14a, and the T-shaped block 14 is inserted into the T-shaped clamping groove.

[0044] Specifically, Figure 3 As shown, the gear portion 21a may specifically be of the following structure: involute helical teeth are evenly distributed on the outer wall of the gear portion 21a.

[0045] Specifically, Figure 2 As shown, the planetary gear fixing cover 32 is provided with a hub locking shaft 32a and a rotationally supported outer ring 32b. The hub 4 is rotationally connected to the hub locking shaft 32a through the third bearing 7 and is rotationally connected to the rotationally supported outer ring 32b through the fourth bearing 8.

[0046] Specifically, the output reduction ratio between the motor shaft 21 and the wheel hub 4 is controlled by the parameters of the first gear section and the second gear section, and can be matched according to the actual needs of the vehicle.

[0047] Specifically, Figure 6 As shown, the wheel hub 4 includes a wheel hub inner portion 41 and a wheel hub outer portion 42 which are fixedly connected together.

[0048] Specifically, Figure 2 As shown, the motor stator 1 is provided with an electromagnetic brake 20 for braking the motor shaft 21. In this embodiment, a hexagonal coupling 9 is installed at the tail of the motor shaft 21, and is connected to the electromagnetic brake 20 through the hexagonal coupling 9.

[0049] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hub motor, characterized in that: include: A driving mechanism, the driving mechanism comprising a motor stator (1) and a motor rotor (2) which are arranged in a coordinated manner, the motor rotor (2) having a motor shaft (21), and a gear portion (21a) being provided on the motor shaft (21); A speed reduction mechanism, the speed reduction mechanism comprising a planetary gear set, an inner gear ring (31) and a planetary gear fixing cover (32), the planetary gear set comprising a planetary gear (33), the planetary gear (33) having a first section gear (33a) and a second section gear (33b) coaxially arranged, the first section gear (33a) being meshed and connected with the gear portion (21a), the second section gear (33b) being meshed and connected with the inner gear ring (31), the planetary gear fixing cover (32) being mounted on a motor stator (1), and the planetary gear (33) being rotatably supported between the motor stator (1) and the planetary gear fixing cover (32); A wheel hub (4), the wheel hub (4) is fixedly connected to the inner gear ring (31), and the wheel hub (4) is rotatably connected to the planetary gear fixing cover (32).

2. The wheel hub motor according to claim 1, characterized in that: The motor stator (1) comprises a motor coil (11), a driving front end cover (12) and a driving rear end cover (13); the driving front end cover (12) and the driving rear end cover (13) are connected together; the motor coil (11) is arranged in the driving rear end cover (13); and the motor rotor (2) is located in the middle of the motor coil (11).

3. The wheel hub motor according to claim 2, characterized in that: A first bearing (5) and a second bearing (6) are respectively installed at both ends of the motor shaft (21); the motor shaft (21) is rotatably connected to the rear drive cover (13) via the first bearing (5); and the motor shaft (21) is rotatably connected to the front drive cover (12) via the second bearing (6).

4. The wheel hub motor according to claim 2, characterized in that: The driving front end cover (12) is provided with a positioning shaft (12a) corresponding to the planetary gear (33), and the planetary gear (33) is rotatably connected to the corresponding positioning shaft (12a).

5. The wheel hub motor according to claim 1, characterized in that: The motor stator (1) is provided with a T-shaped block (14) for connecting to a wheelchair; L-shaped slots (14a) are also provided on both sides of the T-shaped block (14).

6. The wheel hub motor according to claim 1, characterized in that: The outer wall of the gear portion (21a) is evenly distributed with involute helical teeth.

7. The wheel hub motor according to claim 1, characterized in that: The planetary gear fixing cover (32) is provided with a hub locking shaft (32a) and / or a rotationally supported outer ring (32b), and the hub (4) is rotationally connected to the hub locking shaft (32a) and / or the rotationally supported outer ring (32b).

8. The wheel hub motor according to claim 1, characterized in that: The wheel hub (4) comprises a wheel hub inner side portion (41) and a wheel hub outer side portion (42) which are fixedly connected together.

9. The wheel hub motor according to claim 1, characterized in that: The motor stator (1) is provided with an electromagnetic brake (20) for braking the motor shaft (21).

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