Low-temperature-rise frameless motor

Abstract

The utility model discloses a low temperature rise frameless motor comprising a support frame, the inner side of the support frame is provided with a stator main body, the inner side of the stator main body is provided with a rotor, and a gap of the stator main body is also provided with a heat radiation assembly used for assisting in cooling of the stator main body; the heat dissipation assembly comprises a second heat dissipation ring, a first heat dissipation ring and a plurality of heat conduction frames, and the first heat dissipation ring and the second heat dissipation ring are respectively communicated with the plurality of heat conduction frames. Heat is absorbed and conducted to the first heat dissipation ring and the second heat dissipation ring through the heat conduction frame, the first heat dissipation ring and the second heat dissipation ring are located on the outer side of the gap of the stator body, the heat is diffused to the outside, and the problems that heat dissipation efficiency is low only through a metal base and a frame, heat accumulation is prone to being caused in the gap of the stator body, and the heat dissipation efficiency is low are solved. And the normal use effect of the frameless motor is influenced.

Description

Technical Field

[0001] This utility model relates to the field of frameless motor technology, specifically a low-temperature rise frameless motor. Background Technology

[0002] Frameless motors, also known as frameless torque motors, are motors that typically do not have a housing or bearings. Their main structure consists of two parts: a stator and a rotor. Due to their compact structure, and the fact that robot joint space is usually very limited, they are often used in the field of robotics to achieve the miniaturization and weight reduction of the overall robot.

[0003] In the current heat dissipation of frameless motors, the main method is to directly mount them on the metal base or frame of the device. Heat is conducted to the surrounding environment through contact and then dissipated through natural convection or forced heat dissipation. However, when the robot performs high-load tasks for a long time, the frameless motor needs to work continuously, which will generate heat in the process. The heat dissipation efficiency of the metal base and frame is low, and heat can easily accumulate in the gaps of the stator winding coils, which will affect the normal use of the frameless motor. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-temperature frameless motor.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low-temperature frameless motor includes a stator body, a rotor disposed inside the stator body, and a heat dissipation component disposed in the gap of the stator body winding coils to assist in cooling the stator body.

[0007] The heat dissipation assembly includes a second heat dissipation ring with an inner cavity. The bottom of the second heat dissipation ring is fixedly connected to the stator body. The bottom of the second heat dissipation ring is provided with a plurality of heat-conducting frames with inner cavities. The plurality of heat-conducting frames are respectively disposed in the gaps of the corresponding stator bodies to absorb the heat in the gaps of the stator bodies. One side of the top of the second heat dissipation ring is connected to a first heat dissipation ring with an inner cavity. The bottom of the first heat dissipation ring is connected to the heat-conducting frames, and the interior of the first heat dissipation ring is connected to the interior of the heat-conducting frames.

[0008] Furthermore, a driving component is provided between the second heat dissipation ring and the first heat dissipation ring to drive fluid to flow between the heat-conducting frame, the first heat dissipation ring and the second heat dissipation ring;

[0009] The second heat dissipation ring is higher than the first heat dissipation ring, and a fan blade is provided between the second heat dissipation ring and the first heat dissipation ring. One side of the fan blade is connected to the rotor to assist the second heat dissipation ring in dissipating heat from the stator body.

[0010] Furthermore, several hollow heat dissipation plates are provided on the outer side of the second heat dissipation ring, and the interior of the heat dissipation plates is connected to the inner cavity of the second heat dissipation ring to increase the surface area of ​​the second heat dissipation ring.

[0011] Furthermore, the drive assembly includes a sealing cylinder with two openings, and the sealing cylinder communicates with the inner cavities of the first heat dissipation ring and the second heat dissipation ring through the two openings respectively.

[0012] A gear set is also installed inside the sealed cylinder. One end of the input shaft of the gear set rotates through and extends out of the sealed cylinder, and is connected to the rotor through a transmission component to drive the gear set to rotate.

[0013] Furthermore, the transmission assembly includes a first gear, which is rotatably sleeved on the end of the output shaft of the gear set. A gear ring is meshed with the side of the first gear near the rotor. A connecting assembly is provided on one side of the gear ring, and one side of the connecting assembly is connected to the rotor to drive the gear set to rotate.

[0014] Furthermore, the connecting assembly includes a first rotating ring, the bottom of which is rotatably connected to the top of a first heat dissipation ring, the inner side of which is fixedly connected to the rotor, a rectangular block fixedly connected to the outer side of which, a second rotating ring fixedly connected to one side of the rectangular block, and the outer side of which is fixedly connected to the fan blade and the toothed ring respectively.

[0015] The bottom of the second rotating ring is rotatably connected to the top of the first heat dissipation ring. The tops of both the first and second rotating rings are rotatably connected to the bottom of the fixed cover. The top of the fixed cover is connected to the sealing cylinder, and the bottom of the sealing cylinder and the fixed cover are connected.

[0016] The top of the first heat dissipation ring is also provided with an annular opening, so that the interior of the first heat dissipation ring, the inner side of the second rotating ring, the outer side of the first rotating ring, and the fixed cover form a cavity, and the cavity is connected to the sealing cylinder.

[0017] Furthermore, the first and second heat dissipation rings are connected to the heat-conducting frame via a mounting mechanism;

[0018] The mounting mechanism includes a first connecting pipe, the top end of which is connected to the corresponding first heat dissipation ring and second heat dissipation ring respectively, and the three are internally connected. The bottom end of the first connecting pipe is inserted into the interior of the second connecting pipe, and the bottom of the second connecting pipe is connected to the top of the heat conduction frame, and the three are internally connected.

[0019] Furthermore, the outer side of the first connecting pipe is threaded with a threaded sleeve, and the inner side of the threaded sleeve is threaded with the outer side of the second connecting pipe.

[0020] Compared with existing technologies, this low-temperature frameless motor has the following advantages:

[0021] I. This utility model provides a corresponding heat-conducting frame in the stator body gap, which absorbs and conducts heat to the first and second heat dissipation rings. The first and second heat dissipation rings are located on the outside of the stator body gap, so that the heat is diffused to the outside. This solves the problem that the existing heat dissipation through the metal base and frame is inefficient and easily causes heat accumulation in the stator body gap, which affects the normal operation of the frameless motor.

[0022] Second, in this utility model, several heat-conducting frames are respectively connected to the same first heat dissipation ring and second heat dissipation ring. At the same time, the heat-conducting frames are detachably connected to the first heat dissipation ring and the second heat dissipation ring via threaded sleeves, first connecting pipes and second connecting pipes, which facilitates the replacement and cleaning of the heat-conducting frames and improves the stability of operation. Meanwhile, there are still fan blades on the stator body. The rotor drives the fan blades to rotate, which further drives the flow of liquid and airflow, thereby improving the heat dissipation effect. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the heat-conducting frame in this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the heat dissipation component in this utility model;

[0026] Figure 4 This is a cross-sectional view of the heat-conducting frame in this utility model;

[0027] Figure 5 This is a cross-sectional view of the first heat dissipation ring in this utility model;

[0028] Figure 6 This is a cross-sectional view of the sealing cylinder in this utility model;

[0029] Figure 7 This is a three-dimensional structural diagram of the first gear in this utility model;

[0030] Figure 8 This is a cross-sectional view of the first rotating ring in this utility model.

[0031] In the diagram: 1. Second rotating ring; 2. Stator body; 3. Rotor; 4. Fan blade; 5. Second connecting pipe; 6. Gear ring; 7. Heat sink; 8. First gear; 9. Gear set; 10. Sealing cylinder; 11. First heat dissipation ring; 12. Second heat dissipation ring; 13. Heat conduction frame; 14. First connecting pipe; 15. Threaded sleeve; 16. First rotating ring; 17. Fixed cover. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] like Figure 1-8 As shown, this utility model provides a technical solution: a low-temperature frameless motor, including a stator body 2, a rotor 3 disposed inside the stator body 2, and a heat dissipation assembly disposed in the gap between the winding coils of the stator body 2 to assist in cooling the stator body 2; the heat dissipation assembly includes a second heat dissipation ring 12 with an inner cavity, the bottom of the second heat dissipation ring 12 being fixedly connected to the stator body 2, and a plurality of heat-conducting frames 13 with inner cavities disposed at the bottom of the second heat dissipation ring 12, the plurality of heat-conducting frames 13 being respectively disposed in the corresponding gaps of the stator body 2 to absorb the heat in the gaps of the stator body 2, and a portion of the heat dissipation frame 13 being disposed at the top of the second heat dissipation ring 12. A first heat dissipation ring 11 with an inner cavity is connected to the side. The bottom of the first heat dissipation ring 11 is connected to the heat conduction frame 13, and the interior of the first heat dissipation ring 11 is connected to the interior of the heat conduction frame 13. A driving component is also provided between the second heat dissipation ring 12 and the first heat dissipation ring 11 to drive fluid to flow between the heat conduction frame 13, the first heat dissipation ring 11 and the second heat dissipation ring 12. The height of the second heat dissipation ring 12 is higher than the height of the first heat dissipation ring 11, and a fan blade 4 is also provided between the second heat dissipation ring 12 and the first heat dissipation ring 11. One side of the fan blade 4 is connected to the rotor 3 to assist the second heat dissipation ring 12 in dissipating heat from the stator body 2.

[0034] In use, the liquid can be fluorinated liquid, deionized water-based coolant, mineral oil, etc. The bottom of the second heat dissipation ring 12 is detachably and fixedly connected to the support frame 1 for support and fixation. The top of the heat conduction frame 13 has a liquid inlet and a liquid outlet, which are respectively connected to the second heat dissipation ring 12 and the first heat dissipation ring 11. The liquid is driven by the drive component to move the liquid in the heat conduction frame 13 to the second heat dissipation ring 12. The liquid in the second heat dissipation ring 12 flows into the first heat dissipation ring 11, and the liquid in the first heat dissipation ring 11 re-enters the heat conduction frame 13, thus circulating. At the same time, the shape of the heat conduction frame 13 is consistent with that of the stator. The shape of the gap in the main body 2 is adapted to the shape of the heat-conducting frame 13, and the top and bottom of the heat-conducting frame 13 are provided with connecting slots to facilitate gas flow. At the same time, the outer side of the heat-conducting frame 13 is also provided with an insulating coating and a heat-conducting layer, which are in contact with the stator main body 2. The two side walls of the heat-conducting frame 13 are respectively closely attached to the insulation layer of the adjacent winding coils, absorbing heat into the liquid. In the flow of the liquid, the heat moves to the second heat dissipation ring 12, and diffuses to the outside through the surface of the second heat dissipation ring 12 and the action of the fan blades 4, realizing rapid heat dissipation of the gap in the stator main body 2, improving heat dissipation efficiency, so that the frameless motor can work under high intensity for a long time.

[0035] The outer side of the second heat dissipation ring 12 is also provided with several hollow heat dissipation plates 7, and the interior of the heat dissipation plates 7 is connected to the inner cavity of the second heat dissipation ring 12 to increase the surface area of ​​the second heat dissipation ring 12. In use, the heat dissipation plates 7 are located above the fan blades 4, and the airflow blown upward by the fan blades 4 passes through the gaps between the heat dissipation plates 7 to improve the heat dissipation efficiency of the heat dissipation plates 7. The driving component includes a sealing cylinder 10, which has two openings and is connected to the inner cavities of the first heat dissipation ring 11 and the second heat dissipation ring 12 through the two openings respectively. A gear set 9 is also installed inside the sealing cylinder 10. One end of the input shaft of the gear set 9 rotates through and extends out of the sealing cylinder 10, and the end of the gear set 9 located outside the sealing cylinder 10 is connected to the rotor 3 through a transmission component to drive the gear set 9 to rotate. In use, the rotor 3 drives the output shaft of the gear set 9 to rotate, and the output shaft drives the second gear to rotate. The second gear drives the third gear to rotate through meshing. The third gear and the second gear are in contact with the inner wall of the sealing cylinder 10 and are located between the two openings. By forming a low-pressure side at the separation point of the two gears, the liquid moves along the inner wall of the sealing cylinder 10 to the other side. Then, a high-pressure side is formed at the closing side, and the liquid is discharged, thus realizing the delivery of liquid. The two openings on the sealing cylinder 10 are located on the low-pressure side and the high-pressure side, respectively. The rotation of the second gear and the third gear drives the liquid to flow between the two sides. The third gear has the same module as the second gear and the gear ratio is 1:1. The inner wall of the sealing cylinder (10) is provided with a wear-resistant liner that mates with the end face of the gear. The wear-resistant liner is connected to the side wall of the sealing cylinder (10) through adjusting bolts to form a gear pump structure with adjustable axial clearance. The gear set adopts an involute spur gear structure. The mating clearance between the gear end face and the wear-resistant liner is controlled within the range of 0.02-0.05mm by adjusting bolts. The wear-resistant liner is made of oil-impregnated graphite bronze and has a wave spring on its back to compensate for the axial wear of the gear. Its specific principle can be referred to as a gear pump.

[0036] The transmission assembly includes a first gear 8, which is rotatably mounted on the end of the output shaft of the gear set 9. A gear ring 6 is meshed with the first gear 8 near the rotor 3. A connecting assembly is provided on one side of the gear ring 6, and one side of the connecting assembly is connected to the rotor 3 to drive the gear set 9 to rotate. The connecting assembly includes a first rotating ring 16, the bottom of which is rotatably connected to the top of a first heat dissipation ring 11. The inner side of the first rotating ring 16 is fixedly connected to the rotor 3. A rectangular block is fixedly connected to the outer side of the first rotating ring 16. A second rotating ring 1 is fixedly connected to one side of the rectangular block. The outer side of the second rotating ring 1 is fixedly connected to the fan blade 4 and the gear ring 6, respectively. The bottom of the second rotating ring 1 is rotatably connected to the top of the first heat dissipation ring 11, and the tops of the first rotating ring 16 and the second rotating ring 1 are connected to each other. All are rotatably connected to the bottom of the fixed cover 17, and the top of the fixed cover 17 is connected to the sealing cylinder 10, and the bottom of the sealing cylinder 10 and the fixed cover 17 are connected; the top of the first heat dissipation ring 11 is also provided with an annular opening so that the inside of the first heat dissipation ring 11, the inside of the second rotating ring 1, the outside of the first rotating ring 16 and the fixed cover 17 form a chamber, and the chamber is connected to the sealing cylinder 10; in use, the rotor 3 drives the first rotating ring 16 to rotate, the first rotating ring 16 drives the second rotating ring 1 to rotate, and the second rotating ring 1 drives the fan blade 4 and the toothed ring 6 to rotate; at the same time, the gap channel between the first rotating ring 16 and the second rotating ring 1 connects the first heat dissipation ring 11 and the fixed cover 17 respectively, and connects the first heat dissipation ring 11 and the sealing cylinder 10 to facilitate liquid circulation.

[0037] The first heat dissipation ring 11 and the second heat dissipation ring 12 are connected to the heat conduction frame 13 through an installation mechanism. The installation mechanism includes a first connecting pipe 14, the top end of which is connected to the corresponding first heat dissipation ring 11 and the second heat dissipation ring 12 respectively, and the three are internally connected. The bottom end of the first connecting pipe 14 is inserted into the interior of the second connecting pipe 5, and the bottom of the second connecting pipe 5 is connected to the top of the heat conduction frame 13, and the three are internally connected. A threaded sleeve 15 is threadedly connected to the outer side of the first connecting pipe 14, and the inner side of the threaded sleeve 15 is threadedly connected to the outer side of the second connecting pipe 5. In use, the second connecting pipe 5 is fixedly connected to both the liquid inlet and liquid outlet of the heat conduction frame 13. First, the second connecting pipe 5 is sleeved on the outer side of the first connecting pipe 14. Then, by rotating the threaded sleeve 15, the threaded sleeve 15 is spiraled downward and threadedly connected to the second connecting pipe 5, so as to facilitate the disassembly and cleaning of the heat conduction frame 13.

Claims

1. A low-temperature frameless motor, comprising a stator body (2), wherein a rotor (3) is disposed on the inner side of the stator body (2), characterized in that, A heat dissipation component is also provided in the gap between the winding coils of the stator body (2) to assist the stator body (2) in cooling down; The heat dissipation assembly includes a second heat dissipation ring (12) with an inner cavity. The bottom of the second heat dissipation ring (12) is fixedly connected to the stator body (2). The bottom of the second heat dissipation ring (12) is provided with a plurality of heat-conducting frames (13) with inner cavities. The plurality of heat-conducting frames (13) are respectively disposed in the gaps of the corresponding stator bodies (2) for absorbing the heat in the gaps of the stator bodies (2). One side of the top of the second heat dissipation ring (12) is connected to a first heat dissipation ring (11) with an inner cavity. The bottom of the first heat dissipation ring (11) is connected to the heat-conducting frames (13), and the interior of the first heat dissipation ring (11) is connected to the interior of the heat-conducting frames (13).

2. The low-temperature rise frameless motor according to claim 1, characterized in that: A driving component is also provided between the second heat dissipation ring (12) and the first heat dissipation ring (11) for driving fluid to flow between the heat conduction frame (13), the first heat dissipation ring (11) and the second heat dissipation ring (12); The height of the second heat dissipation ring (12) is higher than that of the first heat dissipation ring (11), and a fan blade (4) is provided between the second heat dissipation ring (12) and the first heat dissipation ring (11). One side of the fan blade (4) is connected to the rotor (3) to assist the second heat dissipation ring (12) in dissipating heat from the stator body (2).

3. The low-temperature rise frameless motor according to claim 2, characterized in that: The outer side of the second heat dissipation ring (12) is also provided with a number of hollow heat dissipation plates (7), and the interior of the heat dissipation plates (7) is connected to the inner cavity of the second heat dissipation ring (12) to increase the surface area of ​​the second heat dissipation ring (12).

4. The low-temperature rise frameless motor according to claim 2, characterized in that: The drive assembly includes a sealing cylinder (10), which has two openings and is connected to the inner cavities of the first heat dissipation ring (11) and the second heat dissipation ring (12) through the two openings respectively. A gear set (9) is also installed inside the sealing cylinder (10). One end of the input shaft of the gear set (9) extends through the sealing cylinder (10) and is connected to the rotor (3) through a transmission assembly to drive the gear set (9) to rotate.

5. The low-temperature rise frameless motor according to claim 4, characterized in that: The transmission assembly includes a first gear (8), which is rotatably sleeved on the end of the output shaft of the gear set (9). A gear ring (6) is meshed with the first gear (8) on the side near the rotor (3). A connecting component is provided on one side of the gear ring (6), and one side of the connecting component is connected to the rotor (3) to drive the gear set (9) to rotate.

6. The low-temperature rise frameless motor according to claim 5, characterized in that: The connecting assembly includes a first rotating ring (16), the bottom of which is rotatably connected to the top of the first heat dissipation ring (11), the inner side of which is fixedly connected to the rotor (3), a rectangular block is fixedly connected to the outer side of which, a second rotating ring (1) is fixedly connected to one side of the rectangular block, and the outer side of the second rotating ring (1) is fixedly connected to the fan blade (4) and the toothed ring (6) respectively. The bottom of the second rotating ring (1) is rotatably connected to the top of the first heat dissipation ring (11), the tops of the first rotating ring (16) and the second rotating ring (1) are both rotatably connected to the bottom of the fixed cover (17), and the top of the fixed cover (17) is connected to the sealing cylinder (10), and the bottom of the sealing cylinder (10) and the fixed cover (17) are connected. The top of the first heat dissipation ring (11) is also provided with an annular opening so that the interior of the first heat dissipation ring (11), the inner side of the second rotating ring (1), the outer side of the first rotating ring (16), and the fixed cover (17) form a cavity, and the cavity is connected to the sealing cylinder (10).

7. The low-temperature rise frameless motor according to claim 2, characterized in that: The first heat dissipation ring (11) and the second heat dissipation ring (12) are connected to the heat conduction frame (13) through a mounting mechanism; The installation mechanism includes a first connecting pipe (14), the top end of which is connected to the corresponding first heat dissipation ring (11) and second heat dissipation ring (12) respectively, and the three are internally connected. The bottom end of the first connecting pipe (14) is inserted into the interior of the second connecting pipe (5), and the bottom of the second connecting pipe (5) is connected to the top of the heat-conducting frame (13), and the three are internally connected.

8. The low-temperature rise frameless motor according to claim 7, characterized in that: The outer side of the first connecting pipe (14) is threadedly connected to a threaded sleeve (15), and the inner side of the threaded sleeve (15) is threadedly connected to the outer side of the second connecting pipe (5).

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