CN214014019U - Running roller motor - Google Patents

Abstract

The utility model discloses a running roller motor, which comprises a shell component, a motor group, a first fixed shaft, a second fixed shaft, a speed reducer and a coupler; the shaft coupling is fixed with the shell assembly, the motor unit is provided with a motor shaft, the output end of the motor shaft is connected with the speed reducer, the output shaft of the speed reducer is rotatably connected with the shaft coupling, and the shaft coupling is rotatably connected with the first fixed shaft. The motor unit further comprises a motor rear end cover, a first bearing chamber and a second bearing chamber which are coaxially arranged are respectively arranged at two axial ends of the motor rear end cover, the input end of the motor shaft is rotatably connected into the first bearing chamber, and the second fixing shaft is connected into the second bearing chamber. Running roller motor, the motor unit is located casing assembly's inside to realize the speed reduction of cylinder through the speed reducer, energy loss is less, guarantees the concentricity of casing assembly and speed reducer simultaneously through two bearing rooms of coaxial design, reduces complete machine vibration and noise.

Description

Running roller motor

Technical Field

The utility model relates to the technical field of motors, especially, relate to a running roller motor.

Background

The treadmill motor in the market at present generally adopts the permanent magnetism direct current that takes the flywheel to have the brush motor, connects flywheel and mechanical drum through the area and slows down, and belt transmission can cause more energy loss. Meanwhile, the motor is positioned outside the roller, so that the whole structure occupies a larger space, the assembly process is more, the size of the treadmill is increased, and the cost is increased. And because the axial dimension of cylinder is longer, if arrange the inside of cylinder in with the motor, will appear the defect that the concentricity is not enough, lead to the cylinder vibration, in addition, there is the brush motor still have the shortcoming that the life-span is short, the noise is big and output efficiency is low, need design a running roller motor that can reduce structure size, can reduce complete machine vibration and noise again for this, guarantee treadmill use comfort.

SUMMERY OF THE UTILITY MODEL

In order to solve the running motor occupation space among the prior art big, the more technical problem of energy loss, the utility model provides a running roller motor solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a running roller motor comprises a shell assembly, a motor set, a first fixed shaft, a second fixed shaft, a speed reducer and a coupling; the shell assembly is of a barrel-shaped structure with a cavity inside, the motor set, the speed reducer and the coupler are located inside the shell assembly, the coupler is fixed with the shell assembly, the motor set is provided with a motor shaft, the output end of the motor shaft is connected with the speed reducer, the output shaft of the speed reducer is rotatably connected with the coupler, and the coupler is rotatably connected with the first fixed shaft; the first fixed shaft extends from one axial end of the housing assembly and the second fixed shaft extends from the other axial end of the housing assembly.

The motor set further comprises a motor rear end cover, a first bearing chamber and a second bearing chamber which are axially recessed and coaxially arranged are respectively arranged at two axial ends of the motor rear end cover, a bearing is respectively arranged in the first bearing chamber and the second bearing chamber, the input end of the motor shaft is rotatably connected into the first bearing chamber, and the second fixing shaft is connected into the second bearing chamber.

First fixed axle and second fixed axle are located the both ends of casing subassembly respectively, and fixed with exterior structure, mainly play and support fixed action, casing subassembly is rotating member, casing subassembly winds the motor shaft rotation, for avoiding structural vibration, need guarantee first fixed axle as far as possible, second fixed axle and motor shaft are concentric, the motor assembly passes through the shaft coupling with the moment of torsion of motor shaft and transmits for casing subassembly, thereby it is rotatory to drive casing subassembly, first fixed axle, the shaft coupling, speed reducer and motor shaft coaxial coupling in proper order, consequently, can guarantee higher concentricity between first fixed axle and the motor shaft, do not have intermediate junction spare between second fixed axle and the motor shaft, need guarantee the concentricity of motor shaft and second fixed axle through the duplex bearing room structure on the motor rear end cap.

Further, the shell assembly comprises a shell and roller end covers fixed at two axial ends of the shell, first shaft holes are formed in the two roller end covers, and the first fixing shaft and the second fixing shaft are rotatably connected with the two roller end covers respectively.

Furthermore, a second shaft hole which penetrates through the motor rear end cover in the axial direction is formed in the center of the motor rear end cover, the first bearing chamber and the second bearing chamber are located at two ends of the second shaft hole, and the motor shaft and the second fixed shaft are respectively in contact with the inner surfaces of bearings in the first bearing chamber and the second bearing chamber.

Furthermore, a fixed shaft accommodating cavity is formed between the motor rear end cover connected with a second fixed shaft and the roller end cover, a first connecting wire through hole communicated with the fixed shaft accommodating cavity and the outside of the shell assembly is formed in the second fixed shaft, and a power supply connecting wire penetrates through the first connecting wire through hole to be connected with the outside.

Further, the first connecting through hole comprises a blind hole extending along the axial direction, and an inner radial hole and an outer radial hole which are communicated with the blind hole, the inner radial hole is positioned in the fixed shaft accommodating cavity, and the outer radial hole is positioned outside the shell assembly.

Further, the motor rear end cover includes the end cover body and the annular support fixed with the casing subassembly, the center of end cover body has the third shaft hole that the axial link up, and the end cover body comprises motor connecting portion and fixed axle connecting portion, first bearing room is located the inner periphery of motor connecting portion, annular support cover is located the periphery of fixed axle connecting portion and with fixed axle connecting portion form the second bearing room, the second fixed axle with the internal surface contact of fixed axle connecting portion, the motor shaft and the interior bearing internal surface contact of first bearing room.

Furthermore, the circumferential side face of the fixed shaft connecting portion is provided with a radial through hole communicated with the third shaft hole, the second fixed shaft is provided with a second connecting wire through hole communicated with the third shaft hole and the outer portion of the shell assembly, and the power connecting wire axially penetrates through the motor connecting portion and then enters the second connecting wire through the radial through hole.

Furthermore, the second connecting line through hole comprises an axial through hole located in the center of the second fixing shaft and a radial through hole located outside the shell assembly, the axial through hole is communicated with the third shaft hole, and the radial through hole is communicated with the axial through hole.

Furthermore, a plurality of first ventilation holes which are axially communicated are formed in the end cover of the roller, and a plurality of second ventilation holes which are communicated with the first ventilation holes in a one-to-one correspondence mode are formed in the coupler.

Further, the motor unit further comprises a rotor, a stator shell, a fan and a motor front end cover, wherein the motor front end cover and the motor rear end cover are respectively fixed at two axial ends of the stator shell, the rotor is sleeved on the periphery of the motor shaft, the stator shell is sleeved on the periphery of the rotor, and the fan is connected to one end, close to the motor front end cover, of the rotor.

Furthermore, a positioning hole is formed in the end cover of the roller, which is close to the coupler, and a positioning column matched with the positioning hole is arranged on the end face of the coupler.

Preferably, a plurality of third ventilation holes are formed in the front end cover of the motor and the rear end cover of the motor.

The utility model has the advantages that:

(1) running roller motor, the motor unit is located casing assembly's inside to realize the speed reduction of cylinder through the speed reducer, energy loss is less, will connect the motor rear end cap design of motor shaft and second fixed axle simultaneously for the structure of duplex bearing room, guarantee casing assembly and speed reducer's concentricity through two bearing rooms of coaxial design, reduce complete machine vibration and noise, simplify assembly process simultaneously.

(2) Running roller motor, second bearing room are located between fixed axle connecting portion and the casing subassembly, the end cover body fixed connection of second fixed axle and integral type more is favorable to guaranteeing complete machine concentricity.

(3) Running roller motor, power connecting wire stretches out after passing from the inside of second fixed axle casing subassembly outside.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of a running roller motor according to embodiment 1 of the present invention;

FIG. 2 is an axial cross-sectional view of the rear end cap of the motor of FIG. 1;

FIG. 3 is a front view of the rear end cap of the motor of FIG. 1;

FIG. 4 is a schematic structural view of the second stationary shaft of FIG. 1;

fig. 5 is a perspective view of the coupling of the present invention;

FIG. 6 is a perspective view of the end cap of the roller of the present invention;

FIG. 7 is a schematic view of the engagement relationship between the shaft coupling and the end cap of the roller according to the present invention;

fig. 8 is a schematic structural diagram of the running roller motor according to embodiment 2 of the present invention;

FIG. 9 is an enlarged view taken at a in FIG. 8;

fig. 10 is a perspective view of the rear end cap of the motor of fig. 8 (viewed from one end of the fixed shaft coupling portion);

fig. 11 is a perspective view of the rear end cap of the motor of fig. 8 (viewed from one end of the motor connecting portion).

In the drawings, 1, a housing assembly, 101, a machine shell, 102, a roller end cover, 1021, a first ventilation hole, 1022, a first shaft hole, 2, a motor group, 201, a motor shaft, 202, a motor rear end cover, 2021, a second shaft hole, 2022, an end cover body, 20221, a motor connecting part, 20222, a fixed shaft connecting part, 202221, a radial through hole, 2023, a ring bracket, 2024, a third shaft hole, 2025, a third ventilation hole, 203, a motor front end cover, 204, a rotor, 205, a stator housing, 206, a fan, 3, a first fixed shaft, 4, a second fixed shaft, 5, a speed reducer, 6, a coupler, 601, a second ventilation hole, 602, a positioning column, 7, a first bearing, 8, a second bearing, 9, a third bearing, 10, a fourth bearing, 11, a fifth bearing, 12, a first bearing chamber, 13, a second bearing chamber, 14, a positioning hole, 15, a power supply, 16, a fixed shaft accommodating cavity, 17. first connection line perforation 1701, blind hole 1702, inner radial hole 1703, outer radial hole 18, second connection line perforation 1801, axial through hole 1802, radial through hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Example 1

A running roller motor comprises a shell assembly 1, a motor set 2, a first fixed shaft 3, a second fixed shaft 4, a speed reducer 5 and a coupling 6; the shell assembly 1 is of a barrel-shaped structure with a cavity inside, the motor set 2, the speed reducer 5 and the coupler 6 are located inside the shell assembly 1, the coupler 6 is fixed with the shell assembly 1, the motor set 2 is provided with a motor shaft 201, the output end of the motor shaft 201 is connected with the speed reducer 5, the output shaft of the speed reducer 5 is rotatably connected with the coupler 6, and the coupler 6 is rotatably connected with the first fixed shaft 3; a first fixed shaft 3 extends from one axial end of the housing assembly 1 and a second fixed shaft 4 extends from the other axial end of the housing assembly 1. The reduction gear 5 in the present embodiment is a planetary gear reduction gear.

The motor group 2 further comprises a motor rear end cover 202, the two axial ends of the motor rear end cover 202 are respectively provided with a first bearing chamber 12 and a second bearing chamber 13 which are axially recessed and coaxially arranged, a bearing is respectively arranged in the first bearing chamber 12 and the second bearing chamber 13, the input end of the motor shaft 201 is rotatably connected in the first bearing chamber 12, and the second fixed shaft 4 is connected in the second bearing chamber 13.

As shown in fig. 1, the housing assembly 1 includes a housing 101 and two roller covers 102 fixed to two axial ends of the housing 101, each of the two roller covers 102 has a first shaft hole 1022, and the first fixed shaft 3 and the second fixed shaft 4 are rotatably connected to the two roller covers 102, respectively.

The housing assembly 1 is a cylindrical structure with an inner center, as shown in fig. 1, the first fixed shaft 3 is located at the left end of the housing assembly 1 and extends out of the housing assembly 1 through a first shaft hole 1022 on the left end roller end cover 102, the first fixed shaft 3 is rotatably connected with the left end roller end cover 102 through a first bearing 7, the second fixed shaft 4 is located at the right end of the housing assembly 1 and extends out of the housing assembly 1 through the first shaft hole 1022 on the right end roller end cover 102, the second fixed shaft 4 is rotatably connected with the right end roller end cover 102 through a second bearing 8, the first shaft hole 1022 is in clearance fit with the first fixed shaft 3 and the second fixed shaft 4, the housing assembly 1 is internally provided with a coupler 6, a speed reducer 5 and a motor set 2 from left to right in sequence, the first fixed shaft 3 extends out of an inner hole of the coupler 6 and is rotatably connected with the coupler 6 through a third bearing 9, the first fixed shaft 3 ensures balance through the first bearing 7 and the third bearing 9, the left end of the speed reducer 5 is fixedly connected with the coupler 6 through a locking screw, and the right end of the speed reducer 5 is circumferentially fixed with the motor shaft 201.

In this embodiment, the specific structure of the motor rear end cover 202 is as follows: as shown in fig. 2, the motor rear cover 202 has a second shaft hole 2021 axially penetrating therethrough at the center thereof, the first bearing chamber 12 and the second bearing chamber 13 are located at both ends of the second shaft hole 2021, and the motor shaft 201 and the second stationary shaft 4 are in contact with inner surfaces of bearings in the first bearing chamber 12 and the second bearing chamber 13, respectively.

As shown in fig. 1 and 2, the right end of the motor shaft 201 extends into the first bearing chamber 12 and is rotatably connected to the motor rear end cover 202 through the fourth bearing 10 in the first bearing chamber 12, and the left end of the second stationary shaft 4 extends into the second bearing chamber 13 and is rotatably connected to the motor rear end cover 202 through the fifth bearing 11 in the second bearing chamber 13. The second shaft hole 2021 can reduce the mass of the motor rear end cover 202 and also provide support for the motor shaft 201. As shown in fig. 2 and 3, the motor rear end cover 202 is designed to be a spoke structure, and a plurality of third ventilation holes 2025 which are axially through are formed in the end surface of the motor rear end cover 202, which is beneficial to heat dissipation inside the motor unit 2.

The motor group 2 is preferably a brushless dc motor, which has a longer life, less noise, and higher output efficiency than a brush dc motor. Specifically, as shown in fig. 1 and 8, the motor assembly 2 includes a motor front cover 203, a motor rear cover 202, a rotor 204, a stator housing 205, and a fan 206, where the motor front cover 203 and the motor rear cover 202 are respectively fixed at two axial ends of the stator housing 205, the rotor 204 is sleeved on the periphery of the motor shaft 201, the stator housing 205 is sleeved on the periphery of the rotor 204, and the fan 206 is connected to one end of the rotor 204 close to the motor front cover 203. One end of the power connection 15 is connected to the stator housing 205 and the other end extends out of the housing assembly 1. As shown in fig. 1 and 8, the motor front cover 203, the motor rear cover 202, and the stator housing 205 enclose a hollow barrel structure, the rotor 204 and the fan 206 are located inside the barrel structure, the motor unit 2 is erected inside the housing assembly 1 by means of the motor shaft 201, and the stator housing 205 is not in direct contact with the casing 101. In order to increase the heat dissipation speed, the front end cover 203 of the motor is also provided with a plurality of third ventilation holes 2025.

In this embodiment, one of the third ventilation holes 2025 of the motor rear end cover 202 may also be used as a threading hole for the power connection cord 15, and since the power connection cord 15 is located outside the second fixed shaft 4 after passing through the motor rear end cover 202, the following threading method is preferably used in this embodiment: as shown in fig. 1, a fixed shaft accommodating cavity 16 is formed between the motor rear end cover 202 and the drum end cover 102 to which the second fixed shaft 4 is connected, that is, a cavity between the motor rear end cover 202 and the drum end cover 102 on the right side is the fixed shaft accommodating cavity 16, a first connecting line through hole 17 for communicating the fixed shaft accommodating cavity 16 with the outside of the housing assembly 1 is formed in the second fixed shaft 4, and the power supply connecting line 15 passes through the first connecting line through hole 17 to be connected with the outside. At this time, the power connection line 15 passes through the motor rear end cover 202 and then enters the fixed shaft receiving cavity 16, and then is connected to the outside along the first connection line penetration hole 17.

The optimum route structure of the first connecting line through-hole 17 is: as shown in fig. 1 and 4, the first connecting wire penetration hole 17 includes a blind hole 1701 extending in the axial direction and an inner radial hole 1702 and an outer radial hole 1703 communicating with the blind hole 1701, the inner radial hole 1702 being located in the stationary shaft accommodating chamber 16, the outer radial hole 1703 being located outside the housing assembly 1. The blind hole 1701 extends from the right end of the second stationary shaft 4 to the middle of the second stationary shaft 4 in the axial direction, and the central axes of the inner radial hole 1702 and the outer radial hole 1703 are perpendicular to the central axis of the blind hole 1701, so that the path length of the power connection line 15 can be reduced.

The coupler 6 may be fixed to the casing 101 or to the drum end cover 102, and in this embodiment, the coupler 6 is fixed to the drum end cover 102 at the left end in the following specific fixing manner: as shown in fig. 5-7, the roller end cover 102 close to the coupler 6 is provided with a positioning hole 14, the end surface of the coupler 6 is provided with a positioning post 602 matched with the positioning hole 14, the roller end cover 102 and the coupler 6 rotate synchronously through the matching of the positioning hole 14 and the positioning post 602, so as to drive the casing 101 to rotate, and in order to ensure the structural strength, the outer circumferential surface of the coupler 6 is preferably attached to the inner circumferential surface of the casing 101. In order to avoid the over-high temperature inside the shell assembly 1, a plurality of first ventilation holes 1021 which are axially communicated are arranged on the roller end cover 102, and a plurality of second ventilation holes 601 which are communicated with the first ventilation holes 1021 in a one-to-one correspondence manner are arranged on the coupler 6, so that the inside and the outside of the shell assembly 1 are communicated.

Example 2:

the motor rear end cover 202 in this embodiment also adopts a dual bearing chamber structure, but the difference from embodiment 1 is that the second bearing chamber 13 is not directly communicated with the shaft hole at the center of the motor rear end cover 202, the second fixing shaft 4 does not extend into the second bearing chamber 13, and the structure of the motor rear end cover 202 in this embodiment is: as shown in fig. 9-11, the motor rear cover 202 includes a cover body 2022 and an annular bracket 2023 fixed to the housing assembly 1, the center of the cover body 2022 has a third axial hole 2024 axially penetrating therethrough, the cover body 2022 is composed of a motor connecting portion 20221 and a fixed shaft connecting portion 20222, the first bearing chamber 12 is located on the inner periphery of the motor connecting portion 20221, the annular bracket 2023 is sleeved on the outer periphery of the fixed shaft connecting portion 20222 and forms a second bearing chamber 13 with the fixed shaft connecting portion 20222, the second fixed shaft 4 contacts with the inner surface of the fixed shaft connecting portion 20222, and the motor shaft 201 contacts with the inner surface of the bearing in the first bearing chamber 12.

As shown in fig. 9 and 10, the end cap body 2022 is an integral structure, the second fixed shaft 4 and the inner surface of the fixed shaft connecting portion 20222 are fixed by flat force or spline, and the outer periphery of the motor connecting portion 20221 is fixedly connected to the stator housing 205, so that the stator housing 205 is fixed and the stator housing 205 is prevented from rotating. Meanwhile, the end cover body 2022 is of an integrated structure, so that the concentricity of parts is guaranteed, and the vibration and noise of the motor are reduced.

The third through hole in the motor rear end cover 202 of this embodiment is located on the motor connecting portion 20221, because the right side of the motor connecting portion 20221 is sheltered from by the fifth bearing 11 in support and the second bearing chamber 13, the power connecting wire 15 can not directly get into the fixed shaft and hold the chamber 16, for this reason, the threading route of the power connecting wire 15 in this embodiment is also different from that in embodiment 1, and the corresponding structure is: the circumferential side surface of the fixed shaft connecting part 20222 is provided with a radial through hole 202221 communicated with the third shaft hole 2024, the second fixed shaft 4 is provided with a second connecting wire through hole 18 communicated with the third shaft hole 2024 and the outside of the shell assembly 1, and the power connecting wire 15 axially passes through the motor connecting part 20221 and then enters the second connecting wire through hole 18 through the radial through hole 202221. As shown in fig. 8 and 9, the radial through hole 202221 is located between the fifth bearing 11 and the axial gap of the motor connecting portion 20221, that is, the radial through hole 202221 is also communicated with the third ventilation hole 2025 of the motor rear end cover 202, one end of the power connection line 15 is connected to the stator housing 205, the other end passes through the motor rear end cover 202, then enters the third shaft hole 2024 through the radial through hole 202221, and finally extends to the outside of the housing assembly 1 through the second connection line through hole 18.

The optimum path structure of the second connecting line penetration hole 18 is as follows: the second connection line penetration hole 18 includes an axial through hole 1801 at the center of the second fixed shaft 4 and a radial through hole 1802 at the outside of the housing assembly 1, the axial through hole 1801 communicates with the third shaft hole 2024, and the radial through hole 1802 communicates with the axial through hole 1801. As shown in fig. 8, the axial through hole 1801 penetrates in the axial direction of the second stationary shaft 4, and the radial through hole 1802 is provided perpendicular to the center axis of the axial through hole 1801.

In the description of the present invention, it is to be understood that the terms "center", "left", "right", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (12)

1. A running roller motor is characterized in that: the device comprises a shell assembly (1), a motor set (2), a first fixed shaft (3), a second fixed shaft (4), a speed reducer (5) and a coupler (6); the shell assembly (1) is of a barrel-shaped structure with a cavity inside, the motor set (2), the speed reducer (5) and the coupler (6) are located inside the shell assembly (1), the coupler (6) is fixed with the shell assembly (1), the motor set (2) is provided with a motor shaft (201), the output end of the motor shaft (201) is connected with the speed reducer (5), the output shaft of the speed reducer (5) is rotatably connected with the coupler (6), and the coupler (6) is rotatably connected with the first fixed shaft (3); the first fixed shaft (3) extends out of one axial end of the shell assembly (1), and the second fixed shaft (4) extends out of the other axial end of the shell assembly (1);

the motor group (2) further comprises a motor rear end cover (202), a first bearing chamber (12) and a second bearing chamber (13) which are axially recessed and coaxially arranged are respectively arranged at two axial ends of the motor rear end cover (202), a bearing is respectively arranged in the first bearing chamber (12) and the second bearing chamber (13), the input end of the motor shaft (201) is rotationally connected into the first bearing chamber (12), and the second fixing shaft (4) is connected into the second bearing chamber (13).

2. A running drum motor as claimed in claim 1 wherein: the shell assembly (1) comprises a machine shell (101) and roller end covers (102) fixed at two axial ends of the machine shell (101), first shaft holes (1022) are formed in the two roller end covers (102), and the first fixing shaft (3) and the second fixing shaft (4) are rotatably connected with the two roller end covers (102) respectively.

3. A running drum motor as claimed in claim 2 wherein: the center of the motor rear end cover (202) is provided with a second shaft hole (2021) which penetrates through in the axial direction, the first bearing chamber (12) and the second bearing chamber (13) are located at two ends of the second shaft hole (2021), and the motor shaft (201) and the second fixed shaft (4) are respectively in contact with the inner surfaces of bearings in the first bearing chamber (12) and the second bearing chamber (13).

4. A running drum motor as claimed in claim 3 wherein: a fixed shaft accommodating cavity (16) is formed between a motor rear end cover (202) connected with a second fixed shaft (4) and a roller end cover (102), a first connecting wire through hole (17) for communicating the fixed shaft accommodating cavity (16) with the outer portion of the shell assembly (1) is formed in the second fixed shaft (4), and a power supply connecting wire (15) penetrates through the first connecting wire through hole (17) to be connected with the outer portion.

5. The running drum motor of claim 4, wherein: the first connecting line through hole (17) includes a blind hole (1701) extending in the axial direction, and an inner radial hole (1702) and an outer radial hole (1703) communicating with the blind hole (1701), the inner radial hole (1702) being located within the stationary shaft accommodating cavity (16), the outer radial hole (1703) being located outside the housing assembly (1).

6. A running drum motor as claimed in claim 2 wherein: the motor rear end cover (202) comprises an end cover body (2022) and an annular bracket (2023) fixed with the shell assembly (1), the center of the end cover body (2022) is provided with a third axial hole (2024) which axially penetrates through, the end cover body (2022) is composed of a motor connecting part (20221) and a fixed shaft connecting part (20222), the first bearing chamber (12) is located on the inner periphery of the motor connecting part (20221), the annular bracket (2023) is sleeved on the outer periphery of the fixed shaft connecting part (20222) and forms a second bearing chamber (13) with the fixed shaft connecting part (20222), the second fixed shaft (4) is in contact with the inner surface of the fixed shaft connecting part (20222), and the motor shaft (201) is in contact with the inner surface of a bearing in the first bearing chamber (12).

7. A running drum motor as claimed in claim 6 wherein: the circumferential side surface of the fixed shaft connecting part (20222) is provided with a radial through hole (202221) communicated with the third shaft hole (2024), the second fixed shaft (4) is provided with a second connecting wire through hole (18) communicated with the third shaft hole (2024) and the outer part of the shell assembly (1), and a power connecting wire (15) axially passes through the motor connecting part (20221) and then enters the second connecting wire through hole (18) through the radial through hole (202221).

8. A running drum motor as claimed in claim 7 wherein: the second connecting line through hole (18) comprises an axial through hole (1801) located in the center of the second fixing shaft (4) and a radial through hole (1802) located outside the shell assembly (1), the axial through hole (1801) is communicated with the third shaft hole (2024), and the radial through hole (1802) is communicated with the axial through hole (1801).

9. A running drum motor as claimed in claim 2 wherein: the drum end cover (102) is provided with a plurality of first ventilation holes (1021) which are axially communicated, and the coupler (6) is provided with a plurality of second ventilation holes (601) communicated with the first ventilation holes (1021) in a one-to-one correspondence manner.

10. A running drum motor as claimed in claim 2 wherein: the motor group (2) further comprises a rotor (204), a stator shell (205), a fan (206) and a motor front end cover (203), wherein the motor front end cover (203) and a motor rear end cover (202) are respectively fixed at two axial ends of the stator shell (205), the rotor (204) is sleeved on the periphery of the motor shaft (201), the stator shell (205) is sleeved on the periphery of the rotor (204), and the fan (206) is connected to one end, close to the motor front end cover (203), of the rotor (204).

11. A running drum motor as claimed in claim 2 wherein: and a positioning hole (14) is formed in the roller end cover (102) close to the coupler (6), and a positioning column (602) matched with the positioning hole (14) is arranged on the end face of the coupler (6).

12. A running drum motor as claimed in claim 10 wherein: and the motor front end cover (203) and the motor rear end cover (202) are respectively provided with a plurality of third ventilation holes (2025).

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