Roller motor and treadmill

Abstract

The present invention relates to a roller motor and a treadmill; the roller motor comprises a motor body, the motor body comprises a shaft body, a cooling channel extending in the axial direction is arranged in the shaft body; the cooling channel comprises a first cooling channel and a plurality of second cooling channels; each of the second cooling channels is connected to the first cooling channel; a wire outlet hole is also provided in the shaft body, and the wire outlet hole and the cooling channel are independently arranged on the shaft body and are not connected. A refrigerant is introduced into the cooling channel to exchange heat with the roller motor, which plays a role in cooling; at the same time, the cooling channel is arranged in sections, which ensures the circulation of the refrigerant and the cooling effect, and facilitates the avoidance of the wire outlet hole, so that the stator assembly of the roller motor can be wired out from the wire outlet hole, which can effectively avoid the influence of the refrigerant on the related wires. The treadmill has a simple structure, occupies a small space and has low subsequent maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a roller motor and a treadmill. Background Art

[0002] The drum motor is a driving device that installs the motor inside the drum body. It has the characteristics of compact structure, small space occupation, high transmission efficiency and good sealing. The drum motor can be used as a power source for belt conveyors and is widely used in various industries.

[0003] The drum motor generally includes a front cover, a drum shell, a rear cover, a stator assembly, a rotor assembly, a shaft and a bearing. The front cover and the rear cover are respectively installed at the two ends of the drum shell, forming a cavity in the middle, and the stator assembly and the rotor assembly are installed in the cavity. A first bearing seat and a second bearing seat are respectively arranged in the middle of the front cover and the rear cover. The bearings are respectively installed in the first bearing seat and the second bearing seat, and the shaft is supported on the bearings. For an outer rotor drum motor, since the stator is arranged inside the rotor, the heat generated by the stator armature winding during the operation of the motor is not easy to dissipate, and the temperature of the armature winding is relatively high, which affects the reliability of the drum motor; and in order to ensure the reliability of the motor in the prior art, the power density and torque density of the motor are relatively low, which imposes certain restrictions on its use.

[0004] In addition, the drum motor is a common power mechanism of the treadmill. The existing treadmill is provided with two drums, and the running belt is mounted on the two drums. The interaction between the stator assembly and the rotor assembly of the drum motor causes the rotor assembly and the shaft to rotate, and the drum is further driven to rotate through the belt transmission, and the running belt is then driven to rotate by the drum. The numerous transmission links are bound to cause energy attenuation, resulting in reduced efficiency, and also increasing the cost of fault maintenance. In addition, the multiple transmission structures will cause the treadmill to be thicker and occupy a larger space, limiting its development in the home field. Summary of the invention

[0005] Based on this, an object of an embodiment of the present invention is to provide a drum motor, which has the advantages of simple structure, good heat dissipation effect and low cost.

[0006] A drum motor comprises a motor body, the motor body comprises a shaft body, a cooling channel extending in an axial direction is arranged in the shaft body, the cooling channel is a through hole extending through the shaft body in an axial direction; the cooling channel comprises a first cooling channel and a plurality of second cooling channels; the plurality of second cooling channels are arranged circumferentially along the central axis of the shaft body, and each of the second cooling channels is connected to the first cooling channel; a wire outlet hole is also opened in the shaft body, the wire outlet hole and the cooling channel are independently arranged on the shaft body and are not connected; the drum motor also comprises a refrigerant circulation component; the refrigerant circulation component is connected to the first cooling channel and the second cooling channel respectively through pipelines and together form a circulation loop.

[0007] The drum motor described in the embodiment of the present invention has a cooling channel arranged in the shaft body. By introducing a refrigerant into the cooling channel, the refrigerant flowing in the cooling channel is used to exchange heat with the drum motor, and the heat generated during its operation is taken away, thereby playing a cooling role. The temperature of the drum motor can be significantly reduced, and the power density and torque density of the drum motor can be effectively improved. The structure is simple and the cost of modification or installation is low. At the same time, by arranging the cooling channel in sections and utilizing the arrangement of multiple second cooling channels, while ensuring the circulation of the refrigerant and the cooling effect, it is convenient to avoid the wire outlet hole, so that the stator assembly of the drum motor can outlet the wire from the wire outlet hole, which can effectively prevent the refrigerant in the cooling channel from affecting the relevant wires, thereby improving the safety performance of the device.

[0008] Furthermore, the wire outlet hole includes a channel body extending axially along the shaft body, an inlet end and an outlet end opened radially along the shaft body, the length of the channel body is smaller than the length of the shaft body, the inlet end and the outlet end are respectively connected to the channel body, and the structural design is reasonable.

[0009] Furthermore, a plurality of the second cooling channels are arranged circumferentially along the central axis of the shaft body. This arrangement can effectively improve the uniformity of the heat dissipation effect and facilitates processing.

[0010] Furthermore, it also includes a refrigerant circulation component; the refrigerant circulation component is connected to the first cooling channel and the second cooling channel through pipelines respectively and together form a circulation loop. The refrigerant circulation component is used to realize refrigerant circulation, which helps to save resources while ensuring the cooling effect.

[0011] Furthermore, the refrigerant circulation component includes a circulation motor and a radiator. The circulation motor is used to drive the refrigerant to flow in the circulation loop; the radiator can exchange heat with the refrigerant so that the refrigerant can be recycled. The above arrangement has a simple structure, good circulation and heat exchange effects, avoids the need to set up refrigerant supply and recovery equipment, reduces occupied space, and effectively saves resources.

[0012] Furthermore, the cooling channel is a through hole opened axially through the shaft body. The cooling channel is opened directly in the shaft body, making full use of the existing structure without the need for structural additions. The modification cost is low, and the heat exchange area can be fully increased, which helps to improve the cooling effect.

[0013] Furthermore, the motor body also includes a shell, a stator assembly and a rotor assembly; the shell is a hollow cylindrical structure, the stator assembly is fixedly arranged on the outer surface of the shaft body and is located inside the shell; the two ends of the shaft body movably penetrate the two end surfaces of the shell and extend to the outside of the shell; the rotor assembly is fixedly arranged on the inner side of the side of the shell and movably sleeved on the outside of the stator assembly, with a simple structure and good stability.

[0014] Furthermore, the shell includes a drum shell, a front end cover and a rear end cover; the drum shell is a hollow cylindrical structure, and the front end cover and the rear end cover are respectively detachably fixed to the two ends of the drum shell; the two ends of the shaft body are respectively penetrated by the front end cover and the rear end cover, and a front bearing is arranged between the shaft body and the front end cover, and a rear bearing is arranged between the shaft body and the rear end cover, which has a simple structure and good stability.

[0015] Furthermore, a spiral groove is provided on the outer surface of the drum shell along the axial direction. This arrangement enables the drum motor to cause air flow when the drum shell rotates along its axial direction during operation, and the air can enhance heat dissipation when flowing along the spiral groove, thereby helping to reduce the temperature of the drum surface and further achieve a cooling effect.

[0016] Furthermore, it also includes a control device and a temperature sensor; the control device is electrically connected to the refrigerant circulation component and the temperature sensor respectively, the control device is preset with a temperature threshold, and the temperature sensor is arranged in the stator component. Through the above settings, the temperature sensor is used to detect the temperature in the stator component and send a signal to the control device, and the control device compares the temperature detection value with the preset threshold. When the temperature is too high, the control device controls the refrigerant circulation component to circulate the refrigerant into the cooling channel to remove the heat in the stator component and realize automatic cooling.

[0017] Furthermore, the stator assembly includes an armature winding and a stator output wire, and the stator output wire is electrically connected to the armature winding; the stator output wire is passed through the output wire hole and extends from the output wire hole to the outside of the drum motor, thereby preventing the refrigerant in the cooling channel from affecting the stator output wire and improving safety performance.

[0018] The drum motor described in the embodiment of the present invention has a cooling channel arranged in the shaft body. Refrigerant is introduced into the cooling channel, and the refrigerant flowing in the cooling channel is utilized to exchange heat with the drum motor to take away the heat generated during its operation, thereby playing a cooling role. The temperature of the drum motor can be significantly reduced, and the power density and torque density of the drum motor can be effectively improved. The structure is simple and the cost of modification or installation is low. Combined with the arrangement of the refrigerant circulation component described in the optional embodiment, the recycling of the refrigerant is realized, which helps to save energy and reduce the use of space. Further combined with the arrangement of the control device and the temperature sensor, automatic cooling is achieved when the temperature of the stator assembly is too high, which helps to save resources and realize automated management. At the same time, by setting the cooling channel in sections and utilizing the setting of the second cooling channel, while ensuring the circulation of the refrigerant and the cooling effect, it is convenient to avoid the wire outlet hole, so that the stator assembly of the drum motor can be wired out from the wire outlet hole, which can effectively avoid the refrigerant in the cooling channel from affecting the related wires, thereby improving the safety performance of the device; further in the preferred embodiment, the structure of the cooling channel and the wire outlet hole is further limited, and the existing structure is fully utilized for modification, the modification cost is low, and the heat exchange area can be fully increased, which is conducive to improving the cooling effect.

[0019] In addition, an embodiment of the present invention further provides a treadmill, which includes a frame, a drive, a running belt and the roller motor described above; the number of the motor bodies is at least 2, the drive is electrically connected to each of the motor bodies, and can simultaneously drive each of the motor bodies to run at the same speed; the running belt is an annular structure, which is mounted outside the shell of the motor body and can circulate under the drive of the roller motor; both ends of the shaft of the motor body are fixed to the frame; the circulating pump and the radiator of the refrigerant circulation assembly are fixedly arranged on the frame and located below the running belt.

[0020] The treadmill described in the embodiment of the present invention is provided with at least two motor bodies, and the running belt is directly sleeved on the shell of the motor body. Since the stator assembly is fixedly connected to the shaft body, the shaft body is fixed to the frame, and the shell is fixedly connected to the rotor assembly of the motor body and is movably arranged relative to the shaft body as a whole, when the drum motor is working, the shell and the rotor assembly of the electronic body rotate around the shaft body and the stator assembly, and the running belt is directly driven to move by the static friction between the contact surface of the shell and the running belt, thereby avoiding the problem of energy loss caused by the use of multiple transmission structures such as transmission shafts, belts and other structures to transmit and drive the running belt of the treadmill in the traditional treadmill, effectively improving the energy efficiency of the treadmill, and at the same time, the structure is simpler, which helps to reduce the occupied space and is suitable for home environments. In addition, combined with the structural improvement of the drum motor, the setting of the cooling channel in the shaft body of the motor body can be used to bring out the heat generated in the motor body during the operation of the treadmill, effectively cool it down, thereby improving the reliability of the drum motor, effectively reducing the failure rate, and reducing the subsequent maintenance costs.

[0021] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic cross-sectional view of the shaft structure described in Example 1 of the present invention;

[0023] Figure 2 This is a schematic side view of the shaft structure described in Example 1 of the present invention;

[0024] Figure 3 This is a schematic diagram of the wire outlet hole described in Example 1 of the present invention;

[0025] Figure 4 This is a longitudinal cross-sectional schematic diagram of the wire outlet hole described in Example 1 of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the drum motor described in Example 1 of the present invention;

[0027] Figure 6 This is a longitudinal cross-sectional schematic diagram of the drum motor structure described in Example 1 of the present invention;

[0028] Figure 7 This is a side view schematic diagram of the drum motor described in Example 1 of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the refrigerant circulation component described in Example 1 of the present invention;

[0030] Fig. 9 This is a schematic diagram of the structure of the treadmill described in Example 2 of the present invention. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] Example 1

[0033] Please refer to Figure 1 , Figure 1 This is a schematic cross-sectional view of the shaft structure of Example 1 of the present invention. As shown in the figure, Example 1 of the present invention provides a drum motor, which includes a motor body, and the motor body includes a shaft 11 used as a rotation center axis, and a cooling channel 20 extending in the axial direction is arranged in the shaft 11; the cooling channel 20 includes a first cooling channel 22 and a plurality of second cooling channels 24; each second cooling channel 24 is connected to the first cooling channel 22; a wire outlet hole 40 for outlet wires of the stator assembly is also opened in the shaft 11, and the wire outlet hole 40 and the cooling channel 20 are independently arranged on the shaft 11 and are not connected.

[0034] The drum motor described in Example 1 of the present invention has a cooling channel arranged in the shaft body. A refrigerant is introduced into the cooling channel, and the refrigerant flowing in the cooling channel is utilized to exchange heat with the drum motor to take away the heat generated during its operation, thereby playing a cooling role. The temperature of the drum motor can be significantly reduced, and the power density and torque density of the drum motor can be effectively improved. The structure is simple and the cost of modification or installation is low. At the same time, the cooling channel is segmented and multiple second cooling channels are utilized to ensure the circulation of the refrigerant and the cooling effect, while facilitating the avoidance of the wire outlet hole, so that the stator assembly of the drum motor can be wired out from the wire outlet hole, which can effectively prevent the refrigerant in the cooling channel from affecting the relevant wires, thereby improving the safety performance of the device.

[0035] For details, please also refer to Figure 2 , Figure 2 This is a side view schematic diagram of the shaft structure described in Example 1 of the present invention. The first cooling channel 22 is arranged along the central axis of the shaft body 11, and a plurality of second cooling channels 24 are arranged circumferentially along the central axis of the shaft body 11, or a plurality of second cooling channels 24 are located on a circle with the central axis of the shaft body 11 as the center. This arrangement can effectively improve the uniformity of the heat dissipation effect and is easy to process.

[0036] As an optional implementation, in this embodiment, the cooling channel 20 is a through hole opened axially through the shaft body 11. The cooling channel 20 is formed by directly opening a through hole in the shaft body 11. The modification cost is low, and the heat exchange area can be fully increased, avoiding the influence of external pipelines on the heat transfer effect, which helps to improve the cooling effect.

[0037] Please also refer to Figure 3-4 , Figure 3 This is a schematic diagram of the outlet hole described in Example 1 of the present invention, Figure 4 This is a schematic longitudinal section of the wire outlet hole described in Example 1 of the present invention. As shown in the figure, the wire outlet hole 40 includes a channel body 42 extending axially along the shaft body 11, an inlet end 44 and an outlet end 46 opened radially along the shaft body 11, the length of the channel body 42 is less than the length of the shaft body 11, the inlet end 44 and the outlet end 46 are respectively connected to the two ends of the channel body 42, and the structural design is reasonable.

[0038] It should be noted that, in the present embodiment, the wire outlet hole 40 and the cooling channel 20 are independently arranged on the shaft body 11 and are not connected. Specifically, the positional relationship between the wire outlet hole 40 and the cooling channel 20 can be: the wire outlet hole 40 and the second cooling channel 24 are located at the same end of the shaft body 11 and the length of the channel body 42 is not greater than the length of the second cooling channel 24, the wire outlet hole 40 and the second cooling channel 24 are respectively located on both sides of the shaft body, or the channel body 42 coincides with the central axis of the shaft body 11, and the inlet end 44 and the outlet section 46 are both located between two adjacent second cooling channels 24. The above arrangement helps to make full use of the internal space of the shaft body 11, and ensures that the cooling channel 20 has sufficient volume to allow the passage of refrigerant for cooling without affecting the outlet of the stator assembly. In other embodiments, the wire outlet hole 40 and the cooling channel 20 can also be other structural arrangements, as long as they are independent of each other and not connected, without being limited to this example.

[0039] Further, please also refer to Figure 5-7 , Figure 5 This is a schematic diagram of the structure of the drum motor according to Embodiment 1 of the present invention. Figure 6 This is a longitudinal sectional schematic diagram of the drum motor structure according to Embodiment 1 of the present invention, Figure 7 This is a side view schematic diagram of the drum motor of Example 1 of the present invention. As shown in the figure, the motor body also includes a housing, a stator assembly 15 and a rotor assembly 16. The housing is a hollow cylindrical structure, and the stator assembly 15 is fixedly arranged on the outer surface of the shaft body 11 and is located in the housing; specifically, the stator assembly 15 includes an armature winding 152 and a stator outlet (not shown in the figure), and the stator outlet is electrically connected to the armature winding 152; the stator outlet is passed through the outlet hole 40 and extends from the outlet hole 40 to the outside of the drum motor to prevent the refrigerant in the cooling channel from affecting the stator outlet, thereby improving safety performance.

[0040] The two ends of the shaft body 11 movably penetrate the two end surfaces of the shell and extend to the outside of the shell; the rotor assembly 16 is fixedly arranged on the inner side of the side of the shell and movably sleeved on the outside of the stator assembly 15, with a simple structure and good stability.

[0041] Specifically, the shell includes a drum shell 13, a front end cover 12 and a rear end cover 14; the drum shell 13 is a hollow cylindrical structure, and the front end cover 12 and the rear end cover 14 are respectively detachably fixed to the two ends of the drum shell 13; the two ends of the shaft body 11 are respectively penetrated by the front end cover 12 and the rear end cover 14, and a front bearing 17 is arranged between the shaft body 11 and the front end cover 12, and a rear bearing 18 is arranged between the shaft body 11 and the rear end cover 14, which has a simple structure and good stability.

[0042] As an optional implementation, Figure 5 As shown, in this embodiment, a spiral groove 132 is provided along the axial direction on the outer surface of the drum shell 13. This arrangement enables the drum motor to cause air flow when the drum shell 13 rotates along its axial direction during operation, and the air can enhance heat dissipation when flowing along the spiral groove 132, thereby helping to reduce the temperature of the drum surface and further achieve a cooling effect.

[0043] As an optional implementation, in this embodiment, the drum motor further includes a refrigerant circulation component 30; please also refer to Figure 8 , Figure 8 The schematic diagram of the structure of the refrigerant circulation assembly of Example 1 of the present invention is shown in FIG. The refrigerant circulation assembly 30 is connected to the first cooling channel 22 and the second cooling channel 24 through the pipe 50, and together they form a circulation loop for circulating the refrigerant into the cooling channel 20. The refrigerant circulation assembly is used to realize the refrigerant circulation, which helps to save resources while ensuring the cooling effect.

[0044] Specifically, the refrigerant circulation assembly 30 includes a circulation motor 32 and a radiator 34; the circulation motor 32 is used to drive the refrigerant to circulate in the circulation loop; the radiator 34 can exchange heat with the refrigerant so that the refrigerant can be recycled. The above arrangement has a simple structure, good circulation and heat exchange effects, avoids the need to set up refrigerant supply and recovery equipment, reduces occupied space, and effectively saves resources. The refrigerant can be water, ethanol or oil, and has a good cooling effect.

[0045] The drum motor further includes a control device (not shown) and a temperature sensor (not shown); the control device is electrically connected to the refrigerant circulation assembly 30 and the temperature sensor respectively, the control device is preset with a temperature threshold, and the temperature sensor is arranged in the stator assembly 15. Through the above arrangement, the temperature sensor is used to detect the temperature in the stator assembly 15 and send a signal to the control device, the control device compares the temperature detection value with the preset threshold, and when the measured temperature is higher than the preset threshold, the control device controls the refrigerant circulation assembly 30 to circulate the refrigerant into the cooling channel 20, taking out the heat in the stator assembly 15, and realizing automatic cooling.

[0046] The drum motor described in Example 1 of the present invention has a cooling channel arranged in the shaft body. By introducing a refrigerant into the cooling channel, the refrigerant flowing in the cooling channel is used to exchange heat with the drum motor, and the heat generated during its working process is taken away, which plays a role in cooling. The temperature of the drum motor can be significantly reduced, and the power density and torque density of the drum motor can be effectively improved. The structure is simple and the cost of modification or installation is low. Combined with the setting of the refrigerant circulation component in the optional embodiment, the refrigerant can be recycled, which is helpful to save energy and reduce the use space. Further combined with the setting of the control device and the temperature sensor, automatic cooling is achieved when the temperature of the stator component is too high, which is helpful to save resources and realize automatic management. At the same time, through the setting of the outlet hole, the stator component of the drum motor can be wired out from the outlet hole. Its setting can effectively avoid the refrigerant in the cooling channel from affecting the relevant wires, and improve the safety performance of the device. In the preferred embodiment, the structure of the cooling channel and the outlet hole is further limited, and the existing structure is fully utilized for modification. The modification cost is low, and the heat exchange area can be fully increased, which is helpful to improve the cooling effect.

[0047] Example 2

[0048] Embodiment 2 of the present invention also provides a treadmill, please refer to Fig. 9 , Fig. 9 The treadmill structure schematic diagram of the embodiment 2 of the present invention. As shown in the figure, the treadmill includes a frame 10, a driver 30, a running belt 20 and the roller motor described in the embodiment 1. The roller motor includes at least two motor bodies 40, the driver 30 is electrically connected to each motor body 40, and can drive each motor body 40 to run at the same speed at the same time; the running belt 20 is an annular structure, which is sleeved outside the shell 41, and can be driven by the roller motor to circulate and rotate; the two ends of the shaft 44 are fixed to the frame 10; the circulating pump of the refrigerant circulation assembly and the heat dissipation box are fixedly arranged on the frame 10 and located below the running belt 20.

[0049] The treadmill described in Example 1 of the present invention has at least two motor bodies, and the running belt is directly sleeved on the shell of the motor body. When the drum motor is working, the stator assembly is energized to generate a rotating magnetic field, and acts on the rotor assembly to form a magneto-electrodynamic rotational torque. The stator assembly and the rotor assembly undergo relative motion around their central axes. Since the shaft body is fixed to the frame, the shell and the rotor assembly are fixedly arranged and movably arranged relative to the shaft body and the stator assembly, the shell and the rotor assembly can rotate around the central axis of the shaft body, and the static friction between the contact surface of the shell and the running belt can directly drive the running belt to perform a circular rotational motion. Compared with the two rollers in the traditional treadmill, the running belt is sleeved on the roller, and the rotating magnetic field generated by the stator assembly in the independent and fixed motor acts on the magneto-electric torque formed by the rotor assembly to drive the rotor assembly and the shaft body to rotate around the central axis, and further transmit the rotation of the rotor assembly and the shaft body to the roller through a belt, a transmission shaft, etc., and use the friction between the roller and the running belt to drive the running belt to circulate. The technical solution of the treadmill described in Example 2 of the present invention can effectively avoid the energy loss problem caused by using transmission structures such as transmission shafts, belts and other structures to transmit and drive the treadmill running belt in the prior art, effectively improving the energy efficiency of the treadmill, and at the same time, there is no need to set up transmission structures such as rollers, transmission shafts or belts, so the structure is simpler, which helps to reduce the occupied space, is suitable for home environments, and has a simpler structure; further combined with the structural improvement of the roller motor, the setting of the cooling channel in the shaft body of the motor body can be used to bring out the heat generated in the motor body during the operation of the treadmill, effectively cool it down, thereby improving the reliability of the roller motor, effectively reducing the failure rate, and reducing the subsequent maintenance costs.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A drum motor, comprising a motor body, wherein the motor body comprises a shaft, and wherein: A cooling channel extending in the axial direction is provided in the shaft body, and the cooling channel is a through hole opened in the axial direction through the shaft body; the cooling channel includes a first cooling channel and a plurality of second cooling channels; the plurality of second cooling channels are arranged circumferentially along the central axis of the shaft body, and each of the second cooling channels is connected with the first cooling channel; a wire outlet hole is also provided in the shaft body, and the wire outlet hole and the cooling channel are independently arranged on the shaft body and are not connected; the drum motor also includes a refrigerant circulation component; the refrigerant circulation component is connected with the first cooling channel and the second cooling channel respectively through pipelines and together form a circulation loop.

2. The drum motor according to claim 1, characterized in that: The outlet hole includes a channel body extending axially along the shaft body, an inlet end and an outlet end opened radially along the shaft body, the length of the channel body is smaller than the length of the shaft body, and the inlet end and the outlet end are respectively connected to the channel body.

3. The drum motor according to claim 1, characterized in that: The refrigerant circulation component includes a circulation motor and a radiator.

4. The drum motor according to any one of claims 1 to 3, characterized in that: The motor body also includes a shell, a stator assembly and a rotor assembly; the shell is a hollow cylindrical structure, the stator assembly is fixedly arranged on the outer surface of the shaft body and is located in the shell; the two ends of the shaft body movably penetrate the two end surfaces of the shell and extend to the outside of the shell; the rotor assembly is fixedly arranged on the inner side of the side of the shell and movably sleeved on the outside of the stator assembly.

5. The drum motor according to claim 4, characterized in that: The shell includes a drum shell, a front end cover and a rear end cover; the drum shell is a hollow cylindrical structure, and the front end cover and the rear end cover are detachably fixed to the two ends of the drum shell respectively; the two ends of the shaft body are respectively penetrated by the front end cover and the rear end cover, and a front bearing is arranged between the shaft body and the front end cover, and a rear bearing is arranged between the shaft body and the rear end cover.

6. The drum motor according to claim 5, characterized in that: The outer surface of the drum shell is provided with a spiral groove along the axial direction.

7. The drum motor according to claim 4, characterized in that: It also includes a control device and a temperature sensor; the control device is electrically connected to the refrigerant circulation component and the temperature sensor respectively, the control device has a preset temperature threshold, and the temperature sensor is arranged in the stator component.

8. The drum motor according to claim 4, characterized in that: The stator assembly includes an armature winding and a stator outgoing wire, wherein the stator outgoing wire is electrically connected to the armature winding; the stator outgoing wire is passed through the outgoing wire hole and extends from the outgoing wire hole to the outside of the drum motor.

9. A treadmill, characterized in that: It comprises a frame, a driver, a running belt and the drum motor as described in any one of claims 4-8; the number of the motor bodies is at least 2, the driver is electrically connected to each of the motor bodies, and can simultaneously drive each of the motor bodies to run at the same speed; the running belt is an annular structure, which is sleeved outside the shell of the motor body and can circulate under the drive of the drum motor; both ends of the shaft of the motor body are fixed to the frame; the circulating pump and the radiator of the refrigerant circulation component are fixedly arranged on the frame and located below the running belt.

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