A high-speed hollow cup motor

Abstract

The present invention relates to the field of motor technology, and specifically to a high-speed hollow cup motor, comprising a motor body and a hollow rotating shaft on the motor body; further comprising a heat dissipation pipe and support ribs; a liquid cavity is formed between the heat dissipation pipe, the support ribs and the inner wall of the hollow rotating shaft, and the interior of the heat dissipation pipe is hollow and forms an air cavity for gas circulation; wherein, an air inlet pipe is concentrically installed at one end of the hollow rotating shaft adjacent to the rear end cover of the motor body; a plurality of air outlet pipes are circumferentially installed on the side of the other end of the hollow rotating shaft; the device can reduce the temperature fluctuation of the hollow rotating shaft by setting the heat dissipation pipe and the liquid cavity; at the same time, the circulation of airflow in the heat dissipation pipe can not only dissipate heat to the heat dissipation pipe, but also assist in cooling the coolant in the liquid cavity, thereby ensuring that the temperature of the hollow rotating shaft tends to be stable; furthermore, the airflow discharged from the air outlet pipe will flow toward the vicinity of the motor body, accelerating the air disturbance around the motor body, so that the airflow can cool the hollow rotating shaft while also taking into account the heat dissipation of the motor body.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a high-speed coreless motor. Background Art

[0002] During long-term operation, the motor will generate a large amount of heat. This heat will not only be conducted to the shaft, but will also generate further heat due to the friction between the shaft and the bearing, causing the shaft temperature to rise. High temperature will not only cause slight thermal expansion of the shaft, but also accelerate the failure of the bearing grease, thereby increasing the wear of the bearing, and ultimately affecting the motor's operating accuracy and life.

[0003] In traditional methods, liquid cooling or air cooling technology is mainly used to dissipate heat from the motor housing to reduce heat accumulation inside the motor.

[0004] However, this method does not have sufficient and targeted cooling effect on the heat at the shaft, because liquid cooling or air cooling mainly targets external heat dissipation and cannot directly act near the shaft, resulting in the problem of local overheating of the shaft still existing, affecting the overall heat dissipation efficiency and the operating stability of the motor. Summary of the Invention

[0005] The present invention provides a high-speed coreless motor that can dissipate heat from the rotating shaft and the motor at the same time. The specific solution is as follows:

[0006] A high-speed hollow cup motor comprises a motor body and a hollow rotating shaft on the motor body; it also comprises a heat dissipation pipe and support ribs; the heat dissipation pipe is located inside the hollow rotating shaft, and the two are arranged concentrically; the support ribs are fixed to the side of the heat dissipation pipe, and there are multiple support ribs distributed circumferentially, and the support ribs are slidingly connected to the hollow rotating shaft; both ends of the hollow rotating shaft are blocked, and the end faces of both ends of the heat dissipation pipe are sealed and fit with the inner walls of both ends of the hollow rotating shaft; a liquid cavity is formed between the heat dissipation pipe, the support ribs and the inner wall of the hollow rotating shaft, and the interior of the heat dissipation pipe is hollow and forms an air cavity for gas circulation; wherein, an air inlet pipe is concentrically installed at one end of the hollow rotating shaft adjacent to the rear end cover of the motor body, and the outlet of the air inlet pipe is located in the air cavity; a plurality of air outlet pipes are circumferentially installed on the side of the other end of the hollow rotating shaft, and the inlet of the air outlet pipe passes through the liquid cavity and is located in the air cavity.

[0007] Furthermore, the support ribs are hollow inside to form a cavity, and the cavity extends toward the heat dissipation pipe and is in communication therewith.

[0008] Furthermore, the outlet of one end of the air outlet pipe away from the hollow shaft is beveled, and the outlet direction is toward the motor body.

[0009] Furthermore, a connecting pipe is fixedly connected to the rear end cover of the motor body; the middle parts of the two ends of the connecting pipe are respectively connected with an upper pipe part and a lower pipe part; wherein, the lower pipe part passes through the hollow rotating shaft and is located in the heat dissipation pipe, and the lower pipe part and the hollow rotating shaft are sealed and rotatably connected; the upper pipe part of the connecting pipe is connected to the air supply equipment; a filter is provided in the connecting pipe to prevent dust from entering the heat dissipation pipe and forming an insulation layer on the inner wall of the heat dissipation pipe.

[0010] Furthermore, the filter element includes a sealing plate and a filter cloth; the sealing plate is slidably installed in the connecting pipe, and the outer side surface of the sealing plate is in contact with the inner wall of the connecting pipe; the filter cloth is installed in the sealing plate.

[0011] Furthermore, the filter element also includes a spring, a dust exhaust pipe and a through port; the spring is located as a whole below the sealing plate, one end of the spring is connected to the bottom end of the sealing plate, and the other end is connected to the bottom wall of the connecting pipe; the dust exhaust pipe is connected to the side of the connecting pipe; the through port is formed through the thickness of the sealing plate, and the through port is located as a whole above the filter cloth.

[0012] Furthermore, the portion of the dust exhaust pipe located outside the connecting pipe is also covered with a dust removal bag.

[0013] Furthermore, a bracket is vertically arranged in the middle of the connecting pipe, and the bracket is fixed to the sealing plate as a whole; an L-shaped plate is slidably connected to the bracket through a sliding groove, one end of the L-shaped plate contacts the inner wall of the connecting pipe, and the other end is located above the bracket.

[0014] Furthermore, a plug is installed at the bottom end of the bracket, and the maximum diameter of the plug is smaller than the inner diameter of the lower tube portion of the connecting pipe.

[0015] Furthermore, a plurality of rubber heads are arranged around the side of the plug.

[0016] Compared with the prior art, the present invention can achieve at least the following beneficial effects:

[0017] The device forms a liquid cavity between the heat pipe, the support ribs and the inner wall of the hollow shaft through the arrangement of the heat pipe. The coolant in each liquid cavity is in direct contact with the inner wall of the hollow shaft, the outer wall of the heat pipe and the support ribs, thereby forming a continuous heat exchange interface. The specific heat capacity of the coolant is much higher than that of air, so it can absorb more heat per unit volume, delaying the temperature rise and reducing the temperature fluctuation of the hollow shaft. In addition, the coolant is in direct contact with the hollow shaft as the heat source, which shortens the heat conduction path and improves the cooling and heat dissipation efficiency.

[0018] Furthermore, the heat dissipation pipe and the supporting ribs thereon can exchange heat with the hollow shaft, and achieve continuous heat dissipation and cooling by means of air circulation inside the heat dissipation pipe, thereby improving the heat dissipation effect of the hollow shaft through the synergistic cooling of air cooling and the above-mentioned liquid cooling;

[0019] At the same time, the airflow in the heat pipe can not only dissipate heat from the heat pipe, but also help cool the coolant in the liquid cavity, thereby ensuring that the temperature of the hollow shaft tends to be stable.

[0020] Furthermore, the airflow discharged from the air outlet pipe will flow toward the motor body, and the air outlet pipe will continuously rotate with the hollow shaft, thereby forming a rotary blowing, thereby accelerating the air disturbance around the motor body, so that the airflow can cool the hollow shaft while also taking into account the heat dissipation of the motor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the motor body of the present invention.

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the axial side structure.

[0025] Figure 4 It is a structural schematic diagram of the hollow rotating shaft of the present invention.

[0026] Figure 5 This is a schematic diagram of the cross-sectional structure of the hollow rotating shaft of the present invention.

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the connecting pipe of the present invention.

[0028] Figure 7 It is a structural schematic diagram of the sealing plate of the present invention.

[0029] Figure 8 For the present invention Figure 6 Schematic diagram of the front view structure.

[0030] Figure 9 For the present invention Figure 8 Schematic diagram of another state of the structure.

[0031] Figure 10 Schematic diagram of the structure of the bracket of the present invention.

[0032] Figure 11 Schematic diagram of the structure of the L-shaped plate of the present invention.

[0033] Figure 12 Schematic diagram of the contact between the rubber head and the inner wall of the lower tube portion according to the present invention.

[0034] The accompanying drawings are numerals as follows:

[0035] 100, motor body; 101, hollow shaft; 102, heat dissipation pipe; 103, support rib; 103a, cavity; 104, air inlet pipe; 105, air outlet pipe;

[0036] 200, connecting pipe; 200a, upper pipe part; 200b, lower pipe part; 201, sealing plate; 202, filter cloth; 203, spring; 204, dust exhaust pipe; 205, opening; 206, bracket; 207, slide groove; 208, L-shaped plate; 209, plug; 210, rubber head. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] To do this, please refer to Figures 1 to 5As shown, the present invention provides a high-speed hollow cup motor, including a motor body 100, which can be any large-size motor such as a hollow cup motor, and a hollow shaft 101 on the motor body 100; it also includes a heat dissipation pipe 102 and a support rib 103; the heat dissipation pipe 102 is preferably made of copper to improve the heat exchange and heat dissipation effect; the heat dissipation pipe 102 is located inside the hollow shaft 101, and the two are arranged concentrically; the support rib 103 is consistent with the heat dissipation pipe 102 material and is fixed to the side of the heat dissipation pipe 102, and there are multiple support ribs 103 distributed around the circumference, and the support ribs 103 are slidably connected to the inside of the hollow shaft 101 through a slide groove 207, which improves the stability of its structure, avoids the heat dissipation pipe 102 from shaking in the hollow shaft 101, and facilitates the heat dissipation pipe 102 to be removed from the hollow shaft 101 for replacement; both ends of the hollow shaft 101 are blocked, and the end adjacent to the rear end cover of the motor body 100 can be made detachable The detachable sealing, such as a threaded cover plate, is convenient for disassembling and replacing the heat dissipation pipe 102 in the hollow shaft 101, and the end faces of the heat dissipation pipe 102 are sealed with the inner walls of the hollow shaft 101 at both ends; at the same time, a closed liquid cavity is formed between the heat dissipation pipe 102, the support rib 103 and the inner wall of the hollow shaft 101, and the interior of the heat dissipation pipe 102 is hollow and forms an air cavity for continuous circulation of gas; wherein, an air inlet pipe 104 is concentrically installed at one end of the hollow shaft 101 adjacent to the rear end cover of the motor body 100, and the outlet of the air inlet pipe 104 is located in the air cavity, and one end of the air inlet pipe 104 can be rotatably connected to the output end of an external air pump, a fan or other air supply equipment, so as to introduce cooling gas into the heat dissipation pipe 102; a plurality of air outlet pipes 105 are circumferentially installed on the side surface of the other end of the hollow shaft 101, and the inlet of the air outlet pipe 105 passes through the liquid cavity and is located in the air cavity, so that the flowing gas in the heat dissipation pipe 102 is discharged from the air outlet pipe 105;

[0039] When using the above solution: Figure 5 As shown, the coolant can be injected into the liquid cavity formed between the heat dissipation tube 102, the support rib 103 and the inner wall of the hollow shaft 101 in advance. The coolant in each liquid cavity is in direct contact with the inner wall of the hollow shaft 101, the outer wall of the heat dissipation tube 102 and the support rib 103, thereby forming a continuous heat exchange interface. The specific heat capacity of the coolant is much higher than that of air. It can absorb more heat per unit volume, delay the temperature rise, and reduce the temperature fluctuation of the hollow shaft 101. In addition, the coolant is in direct contact with the hollow shaft 101 as the heat source, so the heat conduction path is shorter and the cooling and heat dissipation efficiency is higher.

[0040] Furthermore, the heat on the hollow shaft 101 can be transferred to the inside / on the heat pipe 102 through the support ribs 103, and the air flow injected by the external air supply device can continuously pass through the heat pipe 102 with heat exchange capability. The air flow directly acts on the inner wall of the heat pipe 102 through the circulation of the gas, thereby cooling the heat pipe 102 and finally being discharged from the air outlet pipe 105. This cycle forms a continuous heat dissipation effect; that is, the heat dissipation effect of the hollow shaft is improved through the synergistic cooling of air cooling and the above-mentioned liquid cooling.

[0041] At the same time, the coolant in the liquid cavity is also in direct contact with the heat pipe 102 and the support rib 103, and the gas circulation in the heat pipe 102 can not only take away the heat conducted into / on the heat pipe 102, but also assist the coolant in the liquid cavity in dissipating heat;

[0042] Furthermore, when the airflow flowing through the heat dissipation pipe 102 is finally discharged from the air outlet pipe 105, the exhaust airflow will flow toward the vicinity of the motor body 100, and the air outlet pipe 105 will continuously rotate with the hollow rotating shaft 101, thereby forming a rotary blowing, thereby accelerating the air disturbance around the motor body 100, so that the airflow can cool the hollow rotating shaft 101 while also taking into account the heat dissipation of the motor body 100, thereby ensuring the service life of the hollow shaft and the stable and efficient operation of the motor.

[0043] Reference Figure 5 As shown, the support rib 103 is hollow inside and forms a cavity 103a, and the cavity 103a extends toward the heat dissipation pipe 102 and is in communication therewith;

[0044] When the above scheme is used: that is, by setting the cavity 103a and connecting it with the internal air cavity of the heat dissipation tube 102, on the one hand, the contact area between the circulating gas and the heat dissipation tube 102 can be increased, thereby improving the heat dissipation effect of the gas on the hollow shaft 101; on the other hand, the indirect contact area between the circulating gas and the coolant in the liquid cavity is also increased, thereby improving the heat dissipation effect of the coolant, thereby further improving the heat dissipation effect of the coolant on the hollow shaft 101.

[0045] Reference Figure 5 、 Figure 4 and Figure 2 As shown, the outlet pipe 105 is away from one end of the hollow shaft 101 and is beveled, and the outlet direction is toward the motor body 100;

[0046] When the above solution is used: the outlet pipe 105 as a whole can be connected to another section of pipe for use, and the added pipe can be a curved pipe, so that the outlet of the curved pipe portion of the outlet pipe 105 is directed toward the motor body 100 or extends to the side of the motor body 100 (not shown in the figure), so that the gas discharged from the outlet pipe 105 can be blown toward the motor body 100 or its vicinity, thereby accelerating the disturbance of the airflow near the motor body 100, and the exhaust airflow can be reused in this form, thereby improving the heat dissipation effect of the motor body 100; by setting the bevel angle, the outlet area of ​​the outlet pipe 105 can be increased, so that the gas discharge range is widened, and the heat dissipation effect of the motor body 100 is further improved.

[0047] Reference Figure 2 and Figure 6 As shown, a connecting pipe 200 is fixedly connected to the rear end cover of the motor body 100; the middle parts of the two ends of the connecting pipe 200 are respectively connected with an upper pipe part 200a and a lower pipe part 200b; wherein, the setting of the lower pipe part 200b can replace the air intake pipe 104, and the lower pipe part 200b passes through the end of the hollow shaft 101 and is located in the heat dissipation pipe 102, and the lower pipe part 200b is sealed and rotatably connected to the hollow shaft 101; the upper pipe part 200a of the connecting pipe 200 is connected to an external air supply device, such as an air pump (not shown in the figure, which is a well-known technology and will not be described in detail). The present application takes the air pump as an example. The air flow velocity entering the heat dissipation pipe 102 can be controlled to be stable through the action of the air pump, and the gas flow rate can be adjusted and determined by the air pump; a filter is provided in the connecting pipe 200 to prevent dust from entering the heat dissipation pipe 102 and forming a heat insulation layer on the inner wall of the heat dissipation pipe 102;

[0048] When the above solution is used, the upper tube portion 200a is connected to an external air pump, and the pumped gas is transferred through the connecting tube 200 and enters the heat dissipation tube 102 from the lower tube portion 200b, thereby obtaining a power source for the air flow inside the heat dissipation tube 102. The lower tube portion 200b of the connecting tube 200 is sealed and rotatably connected to the hollow shaft 101 to ensure that the air pump can normally pump gas into the heat dissipation tube 102 when the hollow shaft 101 rotates.

[0049] It should be added that when the motor body 100 of the present application is used in a dusty environment, dust-laden gas will continue to enter the heat dissipation tube 102 in the hollow shaft 101. After a long time, the dust will form a stratification (insulation layer) on the inner wall of the heat dissipation tube 102, which will affect the heat transfer from the hollow shaft 101 to the heat dissipation tube 102 to a certain extent. For this reason, the present application is also provided with a filter element to reduce the formation of dust stratification on the inner wall of the heat dissipation tube 102, and at the same time reduce the discharge of dust from the heat dissipation tube 102 to the surrounding environment from the air outlet pipe 105 (it should also be noted that since the air outlet pipe 105 is located at the front end cover or the output shaft of the motor body 100, if the air outlet pipe 105 continues to blow the dust-laden gas toward the processed product or other mechanical structure connections, it is bound to interfere with the product processing or cause wear on the mechanical structure connections).

[0050] Reference Figure 6 、 Figure 7 and Figure 8 As shown, specifically, the filter element includes a sealing plate 201 and a filter cloth 202; the sealing plate 201 is slidably mounted in the connecting pipe 200, and the outer side of the sealing plate 201 is in contact with the inner wall of the connecting pipe 200; the filter cloth 202 is mounted in the sealing plate 201;

[0051] When the above solution is used: before the gas enters the heat dissipation pipe 102, it will pass through the filter cloth 202 in the connecting pipe 200, thereby isolating the dust in the gas on the filter cloth 202, and the clean gas will pass through the filter cloth 202 and enter the heat dissipation pipe 102 through the lower pipe part 200b, achieving continuous heat dissipation.

[0052] Reference Figure 6 、 Figure 8 and Figure 9 As shown, the filter element further includes a spring 203, a dust exhaust pipe 204, and a through-hole 205; the spring 203 is entirely located below the sealing plate 201, with one end of the spring 203 connected to the bottom end of the sealing plate 201 and the other end connected to the bottom wall of the connecting pipe 200; the dust exhaust pipe 204 is connected to the side of the connecting pipe 200; the through-hole 205 is formed through the thickness of the sealing plate 201 and is entirely located above the filter cloth 202, and the through-hole 205 and the dust exhaust pipe 204 are on the same vertical axis;

[0053] When the above solution is used: after a lot of dust adheres to the filter cloth 202, the permeability of the filter cloth 202 will decrease, until the filter cloth 202 is full of dust, at this time the resistance of the filter cloth 202 to the pumped gas increases, as a constant flow of gas is continuously pumped in from the upper tube portion 200a, the pumped gas will continuously push the filter cloth 202 and the sealing plate 201 used to install the filter cloth 202 downward, and squeeze the spring 203 to compress the entire body until a gap is formed between the opening 205 on the sealing plate 201 and the dust exhaust pipe 204 (such as Figure 9As shown in FIG, most of the pumped gas is discharged toward the gap formed by the opening 205 and the dust exhaust pipe 204. During this process, the dust on the filter cloth 202 will continue to flow toward the dust exhaust pipe 204 as the gas at the upper tube portion 200a is continuously pumped in, thereby carrying away the dust on the filter cloth 202. After part of the dust on the filter cloth 202 is carried away, the dust on the filter cloth 202 is cleaned.

[0054] Moreover, after the dust on the filter cloth 202 is reduced, the transparency effect of the filter cloth 202 becomes relatively better, and the resistance of the filter cloth 202 to the pumped gas is reduced (or the resistance of the filter cloth 202 to the introduced gas in the transparent state is negligible), and the filter cloth 202 and the sealing plate 201 as a whole are quickly reset upward by the support force of the spring 203. At this time, the opening 205 and the dust exhaust pipe 204 are misaligned and disconnected, and the gas pumped in by the upper tube part 200a will pass through the filter cloth 202 again and be injected into the heat dissipation pipe 102, thereby forming the effect of filtering the pumped gas before entering the heat dissipation pipe 102 and automatically cleaning the dust on the filter cloth 202.

[0055] Reference Figure 9 and Figure 2 As shown, the portion of the dust exhaust pipe 204 located outside the connecting pipe 200 is also covered with a dust bag;

[0056] When the above solution is used: through the design of the dust removal bag, the dust-laden gas output from the dust exhaust pipe 204 can be filtered again to prevent dust from polluting the surrounding environment.

[0057] Reference Figures 8 to 11 As shown, a bracket 206 is vertically arranged in the middle of the connecting pipe 200, and the bracket 206 is fixedly connected to the sealing plate 201 as a whole; an L-shaped plate 208 is slidably connected to the bracket 206 through a sliding groove 207. The sliding groove 207 is specifically opened on one side of the bracket 206 and extends to the middle of the bracket 206 and then to the top of the bracket 206; under the action of gravity, one end of the L-shaped plate 208 always contacts the inner wall of the connecting pipe 200 (or is connected by welding), and the other end is located in the sliding groove 207 and extends above the top of the bracket 206;

[0058] When using the above solution: It should be noted that if Figure 8 As shown, the filter cloth 202 of the present application preferably has a curved surface structure, that is, it is curved in cross section and has a downward convex shape as a whole. Compared with the flat filter structure, the curved structure of the filter cloth 202 of the present application expands the filterable area and can store a certain amount of dust in a dusty environment, thereby preventing the surface of the filter cloth 202 from being quickly blocked.

[0059] Based on this, in the above scheme, on the basis of the downward movement of the sealing plate 201, one end of the L-shaped plate 208 always contacts the inner wall of the connecting pipe 200 and does not move as a whole. As the sealing plate 201 and the bracket 206 move downward, the length of the upper part of the L-shaped plate 208 extending above the bracket 206 gradually increases. During this process, the top end of the L-shaped plate 208 will contact the filter cloth 202, thereby forcing the filter cloth 202 to deform as a whole, thereby loosening the dust inside the filter cloth 202, and after the sealing plate 201 and the filter cloth 202 move downward to the limit, the filter cloth 202 as a whole changes from being convex downward to being convex upward (such as Figure 9 As shown, the filter cloth 202 is turned over), thereby forming an angle and motivation for the dust on the filter cloth 202 to be discharged as the gas is continuously injected, thereby improving the dust cleaning effect on the filter cloth 202.

[0060] Reference Figure 9 and Figure 12 As shown, a plug 209 is installed at the bottom end of the bracket 206. The maximum diameter of the plug 209 is smaller than the inner diameter of the lower tube portion 200b of the connecting tube 200. There is a gap between the side of the maximum diameter of the plug 209 and the inner wall of the lower tube portion 200b of the connecting tube 200.

[0061] When the above scheme is used: based on the downward movement of the sealing plate 201, the sealing plate 201 will also drive the bracket 206 and the plug 209 to move downward. When the through port 205 and the dust exhaust pipe 204 are connected, the plug 209 at this time will enter the lower tube part 200b, thereby reducing the airflow in the connecting tube 200 through the lower tube part 200b. The airflow entering the upper tube part 200a is mostly circulated from the through port 205 and the dust exhaust pipe 204, ensuring the concentration of the airflow, thereby enhancing the cleaning effect of the flowing gas on the filter cloth 202.

[0062] Reference Figure 9 、 Figure 8 、 Figure 10 、 Figure 11 and Figure 12 As shown, a plurality of rubber heads 210 are provided around the side of the plug 209. The side of each rubber head 210 protrudes to the outside of the plug 209, and there is a gap between two adjacent rubber heads 210.

[0063] The airflow injected into the upper tube 200a mainly cleans the surface of the filter cloth 202 after the dust on the surface of the filter cloth 202 is reduced, and the filter cloth 202 becomes relatively transparent. The filter cloth 202 and the sealing plate 201 are then moved upward and reset by the support force of the spring 203. The friction between the rubber head 210 on the plug 209 and the inner wall of the lower tube 200b can delay the time for the filter cloth 202 and the sealing plate 201 to move upward and reset (or due to the existence of friction, the two will slowly move upward by the support force of the spring 203 and will not move upward and reset quickly), thereby extending the connection time of the through port 205 and the dust exhaust pipe 204, and increasing the time for the airflow injected into the upper tube 200a to continuously clean the filter cloth 202, thereby improving the cleaning effect of the dust on the filter cloth 202;

[0064] At this time, the airflow continuously injected into the upper tube part 200a will pass through the gap between the adjacent rubber heads 210 and enter the lower tube part 200b. Since the elastic force of the spring 203 is slightly greater than the friction between the rubber head 210 and the inner wall of the lower tube part 200b, after a certain period of time, the spring 203 can lift and reset the sealing plate 201 and other components, and the plug 209 will be completely separated from the lower tube part 200b, and the gas flow in the heat dissipation pipe 102 will return to normal, and the heat dissipation pipe 102 will enter a normal heat dissipation state.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-speed hollow cup motor, comprising a motor body (100) and a hollow rotating shaft (101) on the motor body (100); characterized in that: Also includes, The heat dissipation pipe (102) is located inside the hollow rotating shaft (101), and the two are arranged concentrically; A plurality of support ribs (103) are fixedly connected to the side of the heat dissipation tube (102) and are distributed around the circumference. The support ribs (103) are slidably connected to the hollow rotating shaft (101); Both ends of the hollow rotating shaft (101) are blocked, and both end surfaces of the heat dissipation tube (102) are sealed and fitted with the inner walls of both ends of the hollow rotating shaft (101); A liquid cavity is formed between the heat dissipation tube (102), the support rib (103) and the inner wall of the hollow rotating shaft (101); the interior of the heat dissipation tube (102) is hollow and forms an air cavity for gas circulation; An air inlet pipe (104) is concentrically mounted on one end of the hollow rotating shaft (101) adjacent to the rear end cover of the motor body (100), and the outlet of the air inlet pipe (104) is located in the air cavity; a plurality of air outlet pipes (105) are circumferentially mounted on the side surface of the other end of the hollow rotating shaft (101), and the inlets of the air outlet pipes (105) pass through the liquid cavity and are located in the air cavity.

2. The high-speed coreless motor according to claim 1, wherein: The support rib (103) is hollow inside and forms a cavity (103a), and the cavity (103a) extends towards the heat dissipation pipe (102) and is in communication therewith.

3. The high-speed coreless motor according to claim 1, wherein: The outlet of one end of the air outlet pipe (105) away from the hollow rotating shaft (101) is beveled, and the outlet direction is toward the motor body (100).

4. The high-speed coreless motor according to claim 1, wherein: A connecting pipe (200) is fixedly connected to the rear end cover of the motor body (100); The middle portions of both ends of the connecting pipe (200) are respectively connected to an upper pipe portion (200a) and a lower pipe portion (200b); The lower tube portion (200b) passes through the hollow rotating shaft (101) and is located inside the heat dissipation tube (102), and the lower tube portion (200b) and the hollow rotating shaft (101) are sealed and rotatably connected; The upper pipe portion (200a) of the connecting pipe (200) is connected to the gas supply equipment; A filter is provided in the connecting pipe (200) to prevent dust from entering the heat dissipation pipe (102) and to form a heat insulation layer on the inner wall of the heat dissipation pipe (102).

5. The high-speed coreless motor according to claim 4, characterized in that: The filter element comprises a sealing plate (201) and a filter cloth (202); The sealing plate (201) is slidably mounted in the connecting tube (200), and the outer side surface of the sealing plate (201) is in contact with the inner wall of the connecting tube (200); A filter cloth (202) is installed in the sealing plate (201).

6. The high-speed coreless motor according to claim 5, characterized in that: The filter element further includes a spring (203), a dust exhaust pipe (204), and a through port (205); The spring (203) is entirely located below the sealing plate (201), one end of the spring (203) is connected to the bottom end of the sealing plate (201), and the other end is connected to the bottom wall of the connecting pipe (200); The dust exhaust pipe (204) is connected to the side of the connecting pipe (200); The through opening (205) is formed through the thickness of the sealing plate (201), and the through opening (205) is entirely located above the filter cloth (202).

7. The high-speed coreless motor according to claim 6, characterized in that: The portion of the dust exhaust pipe (204) located outside the connecting pipe (200) is also covered with a dust removal bag.

8. The high-speed coreless motor according to claim 6, wherein: A bracket (206) is also vertically arranged in the middle of the connecting pipe (200), and the bracket (206) is integrally fixed to the sealing plate (201); The bracket (206) is also slidably connected to an L-shaped plate (208) via a sliding groove (207). One end of the L-shaped plate (208) contacts the inner wall of the connecting pipe (200), and the other end is located above the bracket (206).

9. The high-speed coreless motor according to claim 8, characterized in that: A plug (209) is installed at the bottom end of the bracket (206), and the maximum diameter of the plug (209) is smaller than the inner diameter of the lower tube portion (200b) of the connecting tube (200).

10. The high-speed coreless motor according to claim 9, characterized in that: A plurality of rubber heads (210) are provided around the side of the plug (209).

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