Hub bottom fork planetary gear motor

Abstract

The utility model relates to a wheel hub bottom fork planetary gear motor, which comprises a wheel hub, a wheel hub bottom fork, a motor and a speed reducing mechanism, a spoke of the wheel hub is arranged in an offset manner, an accommodating space capable of accommodating the motor is formed in a rim after the spoke is arranged in an offset manner, and the motor and the speed reducing mechanism are arranged in the accommodating space; a first connecting flange is arranged on the speed reducing mechanism, a lower connecting base connected with the connecting flange is arranged at the lower end of a supporting arm on one side of the hub bottom fork, an output shaft of the speed reducing mechanism penetrates through a shaft hole of the hub to be connected into a shaft hole of a supporting arm on the other side of the hub bottom fork in a pivoted mode, and the hub is connected with the output shaft through insections. The output end of the motor is connected with the input end of the reducing mechanism through a gear shaft; the gear shaft and the speed reducing mechanism output shaft are of a split structure, the gear shaft is used for connecting the motor and the speed reducing mechanism, the speed reducing mechanism output shaft is used for connecting a hub of the speed reducer, and the speed reducing mechanism has the advantages of being reasonable in structure and convenient to assemble and disassemble.

Description

Technical Field

[0001] The utility model relates to a reduction motor, in particular to a hub flat fork planetary reduction motor. Background Art

[0002] The utility model with announcement number CN219192471U discloses an electric motorcycle planetary reduction drive mechanism, including a wheel hub and a motor, wherein the spokes of the wheel hub are offsetly arranged at the edge of the rim, and after the spokes are offset, an accommodation space for accommodating the motor is formed inside the rim, and the motor is arranged in the accommodation space, and an axial through hole is provided on the rotating shaft of the motor, and a main shaft passes through the inside of the axial through hole, and the motor is sleeved on the main shaft through a bearing, and the output end of the motor rotating shaft drives the main shaft to rotate through a reduction mechanism, and the wheel hub is coaxially arranged with the motor and sleeved on the main shaft; the utility model adopts a split arrangement of the motor and the wheel hub, adopts a wheel hub with offset spokes, and the motor is accommodated inside the wheel rim, and the motor does not need to be customized in size and can be matched with motors of different powers, and the split structure tire and the motor can be disassembled separately, and the motor can be simply repaired by opening the motor end cover on one side, and the utility model has the characteristics of reasonable structure, convenient disassembly and assembly, and good versatility.

[0003] In the above structure, since the main shaft passes through the axial through hole opened on the rotating shaft of the motor, the main shaft cooperates with the reduction mechanism and the wheel hub at the same time. The main shaft and the axial through hole need to maintain a high concentricity, and the axial direction of the axial through hole is controlled by the reduction mechanism and the rotating shaft. This structure has high requirements on component processing accuracy and assembly. During use, it is difficult to ensure concentricity with the reduction mechanism and the motor due to the stress on the wheel hub, so abnormal noise is generated during operation. At the same time, the disassembly and maintenance of the above structure are not very convenient. Utility Model Content

[0004] The purpose of the utility model is to provide a wheel hub flat fork planetary reduction motor, which adopts a split gear shaft and a reduction mechanism output shaft to replace the original main shaft, the gear shaft is used to connect the motor and the reduction mechanism, and the reduction mechanism output shaft is used to connect the reducer hub. The utility model has the characteristics of reasonable structure and convenient assembly.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] A hub fork planetary reduction motor comprises a hub, a hub fork, a motor and a reduction mechanism, wherein the spokes of the hub are offset, and after the spokes are offset, an accommodating space for accommodating the motor is formed inside the rim, and the motor and the reduction mechanism are arranged in the accommodating space; it is characterized in that: a first connecting flange is arranged on the reduction mechanism, a lower connecting seat connected to the connecting flange is arranged at the lower end of one side support arm of the hub fork, the output shaft of the reduction mechanism passes through the axial hole of the hub and is inserted into the pivot seat of the other side support arm of the hub fork, the hub is connected to the output shaft by teeth, and the output end of the motor is connected to the input end of the reduction mechanism by a gear shaft.

[0007] The lower connecting seat comprises an annular seat body or an arcuate seat body, and the ends of the annular seat body or the arcuate seat body are provided with an annular connecting portion and an arcuate connecting portion connected to the connecting flange.

[0008] The motor comprises a housing, a stator, a rotor, a front cover and a rear cover. The front cover is provided with an axial hole, the gear shaft is pivotally connected to the axial hole, and one end of the gear shaft is connected to the rotor through a gear key.

[0009] A second connecting flange is also provided on the outer edge of the front end cover. The reduction mechanism includes a cover shell, and a reduction gear ring is provided on the inner wall of the cover shell. The first connecting flange is provided on the outer edge of the cover shell, and the first connecting flange is connected to the second connecting flange, so that the front end cover and the cover shell are connected to form a closed reduction mechanism housing and the motor and the reduction mechanism are fixedly connected. A planetary constellation is provided inside the cover shell, and the planetary constellation is pivotally connected to the axial holes of the cover shell and the front end cover through bearings. A number of planetary gears are provided on the planetary constellation, and the outer sides of the number of planetary gears are meshed with the reduction gear ring, and the inner sides of the number of planetary gears are meshed with the other end of the gear shaft; the output shaft is fixedly connected to the planetary constellation.

[0010] The wheel hub flat fork comprises two support arms and an upper connecting seat, and the two support arms are connected to the upper connecting seat by a detachable connecting structure.

[0011] The detachable connection structure includes a connection part of the upper connection seat and positioning shafts arranged at both ends of the connection part. Positioning shaft holes are opened at the upper ends of the two support arms corresponding to the positions of the positioning shafts. Connecting through holes that cooperate with the connecting screw holes at both ends of the connection part are also opened below the positioning shaft holes. The positioning shafts are inserted into the positioning shaft holes of the support arms, and the bolts pass through the connecting through holes and are screwed into the connecting screw holes. A brake connecting seat is also arranged on the outer side of the spokes of the wheel hub, and a brake disc is fixedly connected to the brake connecting seat. A brake caliper that cooperates with the brake disc is arranged at the lower end of the support arm pivotally connected to the output shaft of the reduction mechanism.

[0012] Since the motor and the wheel hub are distributed on both sides of the reduction mechanism, the utility model adopts a separately arranged gear shaft and a reduction mechanism output shaft to replace the existing long main shaft. This structural assembly structure connects the motor, the reduction mechanism and the wheel hub in pairs, and the concentricity requirements of the three are greatly reduced. Since the gear shaft and the reduction mechanism output shaft adopt a split structure, assembly and disassembly are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model (I);

[0014] Figure 2 This is a schematic diagram of the structure of the utility model (II);

[0015] Figure 3 This is a schematic diagram of the exploded structure of the utility model (I);

[0016] Figure 4 This is a schematic diagram of the exploded structure of the utility model (II);

[0017] Figure 5 It is a schematic diagram of the internal structure of the decomposed structure of the utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the motor and the reduction mechanism of the utility model (I);

[0019] Figure 7 This is a schematic diagram of the structure of the motor and the reduction mechanism of the utility model (II);

[0020] Figure 8 It is a schematic diagram of the exploded structure of the motor and the reduction mechanism of the utility model;

[0021] Fig. 9 It is a schematic diagram of the exploded structure of the speed reduction mechanism of the utility model. DETAILED DESCRIPTION

[0022] like Figure 1-9 As shown, a hub fork planetary reduction motor comprises a hub 1, a hub fork 2, a motor 3 and a reduction mechanism 4. The spokes 11 of the hub 1 are offset, and after the spokes 11 are offset, an accommodating space 13 for accommodating the motor is formed inside the rim 12, and the motor 3 and the reduction mechanism 4 are arranged in the accommodating space 13; the reduction mechanism 4 is provided with a first connecting flange 41, and the lower end of one side support arm of the hub fork 2 is provided with a lower connecting seat 22 connected with the connecting flange 41, the output shaft of the reduction mechanism 4 passes through the axial hole of the hub 1 and is inserted into the pivot seat 24 of the support arm 21 on the other side of the hub fork 2, the hub 1 is connected to the output shaft 42 through teeth, and the output end of the motor 3 is connected to the input end of the reduction mechanism 4 through a gear shaft 5.

[0023] The lower connecting seat 22 comprises an annular seat body or an arcuate seat body 221 , and an annular connecting portion and an arcuate connecting portion 222 connected to the connecting flange are provided at the end of the annular seat body or the arcuate seat body 221 .

[0024] The motor 3 comprises a housing, a stator, a rotor, a front cover 31 and a rear cover 32. The front cover 31 is provided with an axial hole, the gear shaft 5 is pivotally connected to the axial hole, and one end of the gear shaft 5 is connected to the rotor via a gear key.

[0025] The wheel hub flat fork 2 includes two support arms 21 and an upper connecting seat 23, and the two support arms 21 are connected to the upper connecting seat 23 by a detachable connecting structure; the detachable connecting structure includes a connecting portion 231 of the upper connecting seat 23 and a positioning shaft 232 arranged at both ends of the connecting portion, and a positioning shaft hole 211 is opened at the position of the positioning shaft 232 at the upper ends of the two support arms 21, and a connecting through hole 212 that cooperates with the connecting screw holes 233 at both ends of the connecting portion 231 is also opened below the positioning shaft hole 211. The positioning shaft 232 is inserted into the positioning shaft hole 211 of the support arm 21, and the bolt passes through the connecting through hole 212 and is screwed into the connecting screw hole 233 to fix the support arm 21 and the upper connecting seat 23.

[0026] The wheel hub 1 is further provided with a brake connection seat 14 on the outer side of the spoke 11, and a brake disc 6 is fixedly connected to the brake connection seat 14. A brake caliper 7 cooperating with the brake disc 6 is provided at the lower end of the support arm 21 pivotally connected to the output shaft 42 of the reduction mechanism.

[0027] A second connecting flange 33 is also provided on the outer edge of the front end cover 31. The speed reduction mechanism 4 includes a cover shell 43, and a speed reduction ring gear 44 is provided on the inner wall of the cover shell 43. The first connecting flange 41 is provided on the outer edge of the cover shell 43, and the first connecting flange 41 is connected to the second connecting flange 33, so that the front end cover 31 and the cover shell 43 are connected to form a closed speed reduction mechanism 4 housing and the motor 3 and the speed reduction mechanism 4 are fixedly connected. A planetary constellation 45 is provided inside the cover shell 43, and the planetary constellation 45 is pivotally connected to the shaft holes of the cover shell 43 and the front end cover 31 through bearings. A plurality of planetary gears 46 are provided on the planetary constellation 45, and the outer sides of the plurality of planetary gears 46 are meshed with the speed reduction ring gear 44, and the inner sides of the plurality of planetary gears 46 are meshed with the other end of the gear shaft 5; the output shaft 42 is fixedly connected to the planetary constellation 45,

[0028] Since the motor and the wheel hub are distributed on both sides of the reduction mechanism, the utility model adopts a separately arranged gear shaft and a reduction mechanism output shaft to replace the existing long main shaft. This structural assembly structure connects the motor, the reduction mechanism and the wheel hub in pairs, and the concentricity requirements of the three are greatly reduced. Since the gear shaft and the reduction mechanism output shaft adopt a split structure, assembly is more convenient.

[0029] In addition, the wheel hub fork of the utility model adopts a detachable connection structure, the support arms 21 on both sides can be removed separately, and the output shaft 42 of the reduction mechanism is directly plugged into the pivot seat 24 of the support arm 21 on one side of the wheel hub fork 2, and the motor and the reduction mechanism are fixedly connected to the support arm 21 on the other side. The motor and the reduction mechanism can be removed together by removing the support arm 21, which makes disassembly and maintenance more convenient.

Claims

1. A wheel hub flat fork planetary reduction motor, comprising a wheel hub (1), a wheel hub flat fork (2), a motor (3) and a reduction mechanism (4), wherein the wheel hub (1) has a spoke (11) arranged in an offset manner, and after the spoke (11) is offset, a receiving space (13) for receiving the motor is formed inside a wheel rim (12), and the motor (3) and the reduction mechanism (4) are arranged in the receiving space (13); characterized in that: The reduction mechanism (4) is provided with a first connecting flange (41), and a lower connecting seat (22) connected to the connecting flange (41) is provided at the lower end of a supporting arm on one side of the wheel hub fork (2). The output shaft of the reduction mechanism (4) passes through the shaft hole of the wheel hub (1) and is inserted into the pivot seat (24) of the supporting arm (21) on the other side of the wheel hub fork (2). The wheel hub (1) and the output shaft (42) are connected via tooth patterns, and the output end of the motor (3) and the input end of the reduction mechanism (4) are connected via a gear shaft (5).

2. A hub-fork planetary reduction motor according to claim 1, characterized in that: The lower connecting seat (22) comprises an annular seat body or an arcuate seat body (221), and an annular connecting portion and an arcuate connecting portion (222) connected to the connecting flange are provided at the end of the annular seat body or the arcuate seat body (221).

3. A hub-fork planetary reduction motor according to claim 1 or 2, characterized in that: The motor (3) comprises a housing, a stator, a rotor, a front cover (31) and a rear cover (32). The front cover (31) is provided with an axial hole, the gear shaft (5) is pivotally connected to the axial hole, and one end of the gear shaft (5) is connected to the rotor via a gear key.

4. A hub-fork planetary reduction motor as claimed in claim 3, characterized in that: A second connecting flange (33) is also provided on the outer edge of the front end cover (31). The speed reduction mechanism (4) comprises a cover shell (43). A speed reduction ring gear (44) is provided on the inner wall of the cover shell (43). The first connecting flange (41) is provided on the outer edge of the cover shell (43). The first connecting flange (41) is connected to the second connecting flange (33), so that the front end cover (31) and the cover shell (43) are connected to form a closed speed reduction mechanism (4) housing and the motor (3) and the speed reduction mechanism (4) are fixedly connected. A planetary constellation (45) is provided inside the cover shell (43). The planetary constellation (45) is pivotally connected to the shaft holes of the cover shell (43) and the front end cover (31) through bearings. A plurality of planetary gears (46) are provided on the planetary constellation (45). The outer sides of the plurality of planetary gears (46) are meshed with the speed reduction ring gear (44), and the inner sides of the plurality of planetary gears (46) are meshed with the other end of the gear shaft (5). The output shaft (42) is fixedly connected to the planetary constellation (45).

5. The hub-fork planetary reduction motor according to claim 1, characterized in that: The wheel hub flat fork (2) comprises two support arms (21) and an upper connecting seat (23), and the two support arms (21) are connected to the upper connecting seat (23) by a detachable connecting structure.

6. A hub-fork planetary reduction motor as claimed in claim 5, characterized in that: The detachable connection structure comprises a connection portion (231) of an upper connection seat (23) and positioning shafts (232) arranged at both ends of the connection portion; positioning shaft holes (211) are provided at positions of the upper ends of the two support arms (21) corresponding to the positioning shafts (232); connection through holes (212) cooperating with the connection screw holes (233) at both ends of the connection portion (231) are provided below the positioning shaft holes (211); the positioning shafts (232) are inserted into the positioning shaft holes (211) of the support arms (21); bolts pass through the connection through holes (212) and are screwed into the connection screw holes (233) to securely connect the support arms (21) and the upper connection seat (23).

7. The hub-fork planetary reduction motor according to claim 1, characterized in that: The wheel hub (1) is further provided with a brake connection seat (14) on the outer side of the spoke (11), a brake disc (6) is fixedly connected to the brake connection seat (14), and a brake caliper (7) cooperating with the brake disc (6) is provided at the lower end of a support arm (21) pivotally connected to the output shaft (42) of the reduction mechanism.

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