An integrated lightweight dual-output motor with heat dissipation function

Abstract

An integrated lightweight dual-output motor with heat dissipation function, comprising a motor housing, the motor housing includes an outer frame body, and the outer frame body includes two sandwich cylindrical shells arranged back to back; the wall surface of the sandwich cylindrical shell is a sandwich structure, and an intermediate heat dissipation core structure is provided in the sandwich cavity of the sandwich cylindrical shell, and both ends of the intermediate heat dissipation core structure are exposed to the outside; the intermediate heat dissipation core structure is integrally in the shape of a thin-walled cylinder structure, and the wall surface of the thin-walled cylinder structure is composed of Gyroid cells; a liquid cooling pipe is provided on the inner wall of each sandwich cylindrical shell, and a motor coil is provided on the inner side of the liquid cooling pipe; a tail heat dissipation core structure is provided between the two sandwich cylindrical shells, and the outer peripheral edge of the tail heat dissipation core structure is exposed to the outside. The present invention can timely release heat to the air, and for the lightweight design of the joint motor structure, a lattice structure design with an intermediate entity is adopted for the joint motor housing part, greatly reducing the mass of the outer frame body and the tail structure.

Description

Technical Field

[0001] The present invention relates to the field of motor design, and in particular to an integrated lightweight dual-output motor with a heat dissipation function. Background Art

[0002] During the selection and use stage of robot joint motors, the power density ratio and heat dissipation performance are of great significance in the performance indicators of joint motors. The existing motor casings are basically made of metal. By adding a certain number of heat dissipation teeth on the motor casing, the exposed area in the air is increased to improve the heat dissipation effect. Although this design method can bring a certain heat dissipation effect, the heat dissipation effect is not particularly ideal in actual use. In addition, as a protective part against impact and drop, in order to make the motor casing protect the internal winding coils and electrical components, the safety factor of the motor casing design is relatively large, resulting in a relatively heavy mass of the motor casing. Summary of the Invention

[0003] To overcome the above problems, the present invention provides an integrated lightweight dual-output motor with a heat dissipation function.

[0004] The technical solution adopted by the present invention is: an integrated lightweight dual-output motor with a heat dissipation function, including a motor casing. The motor casing includes an outer frame body, and the outer frame body includes two sandwich cylindrical shells arranged back to back. The wall surface of the sandwich cylindrical shell is a sandwich structure. An intermediate heat dissipation core structure is provided in the sandwich cavity of the sandwich cylindrical shell, and both ends of the intermediate heat dissipation core structure are exposed to the outside. The intermediate heat dissipation core structure is integrally in the shape of a thin-walled cylindrical body structure, and the wall surface of the thin-walled cylindrical body structure is composed of Gyroid cells. Cooling liquid holes I are provided on the wall surface of the sandwich cylindrical shell, and cooling liquid holes II communicated with the cooling liquid holes I are provided on the intermediate heat dissipation core structure. The cooling liquid holes I and II are used for the input and output of cooling liquid.

[0005] A liquid cooling pipeline is provided on the inner wall of each sandwich cylindrical shell. The liquid cooling pipeline is a spiral coiled pipe, and openings for the inlet and outlet of cooling liquid are provided at both ends of the spiral coiled pipe. Motor coils are provided on the inner side of the liquid cooling pipeline. One end of each of the two sandwich cylindrical shells is open, and an output end cover is provided at the opening. A coil tail heat conductor is provided at one end where the two sandwich cylindrical shells are close to each other. The coil tail heat conductor is a thin-walled cylinder and is made of a high thermal conductivity material. The coil tail heat conductor can absorb the heat generated at the tail of the motor coil. A tail heat dissipation core structure is provided between the two sandwich cylindrical shells. The tail heat dissipation core structure is a thin plate structure, and the outer periphery of the tail heat dissipation core structure is exposed to the outside.

[0006] Further, a coil heat conductor is provided between the liquid cooling pipe and the motor coil. The coil heat conductor is made of a high thermal conductivity material and can quickly absorb the heat generated by the motor coil and conduct it to the sandwich cylindrical shell.

[0007] Further, the two sandwich cylindrical shells, the intermediate heat dissipation core structure, the liquid cooling pipe, the tail heat dissipation core structure, and the coil tail heat conductor are an integral structure.

[0008] Further, the two sandwich cylindrical shells, the intermediate heat dissipation core structure, the liquid cooling pipe, the tail heat dissipation core structure, and the coil tail heat conductor are formed into an integral structure by additive manufacturing technology.

[0009] Further, the intermediate heat dissipation core structure is filled with a porous structure of multiple Gyroid cells in the sandwich cavity of the sandwich cylindrical shell; the tail heat dissipation core structure is filled with a porous structure of Gyroid cells to replace the solid filling, which helps the lightweight design of the joint motor.

[0010] Further, the coil tail heat conductor is arranged between the tail of the motor coil and the tail heat dissipation core structure, and a tail sealing ring is provided at the installation hole opened in the outer frame body.

[0011] Further, the motor shaft of the dual-output motor extends out from the output end cover, and an output shaft sealing ring is provided between the motor shaft and the output end cover.

[0012] Further, the liquid cooling pipe is in full contact with the inner wall surface of the outer frame body, and a circulating cooling liquid is filled inside the liquid cooling pipe; the inner wall surface of the outer frame body is a thin-walled metal structure, and most of the heat generated during the operation of the motor coil is transmitted to the inner wall surface of the outer frame body through the coil heat conductor and the liquid cooling pipe.

[0013] Further, the intermediate heat dissipation core structure is composed of metal Gyroid cells to release most of the heat generated during the operation of the motor coil to the air through the end face of the intermediate heat dissipation core structure.

[0014] Further, the coil tail heat conductor adopts a metal thin-wall structure and is in full contact with the coil tail to ensure that the heat of the coil tail can be conducted to the tail heat dissipation core structure; the coil tail heat conductor can release the heat of the coil tail to the air through the circumferential surface of the tail heat dissipation core structure.

[0015] The beneficial effects of the present invention are as follows: By adopting the integrated design method of the joint motor housing, complex components such as porous structures and liquid cooling pipes are integrally formed through additive manufacturing technology. Making full use of the advantages of the Gyroid cells of the porous structure, through the heat dissipation method of the coil heat conductor - liquid cooling pipe - intermediate heat dissipation core structure, the heat dissipation performance of the joint motor is effectively improved. Moreover, the end face of the intermediate heat dissipation core structure is directly in contact with the air, which can timely release the heat into the air. Similarly, the circumferential surface of the tail heat dissipation core structure is directly in contact with the air, which can timely release the heat into the air. In addition, for the lightweight design of the joint motor structure, the middle part of the joint motor housing is designed with a lattice structure, which greatly reduces the mass of the outer frame and the tail structure. Description of the Drawings

[0016] Figure 1 It is a general schematic diagram of the joint motor.

[0017] Figure 2 It is a schematic axial sectional view of the joint motor.

[0018] Figure 3 It is a schematic axial sectional view of the integrated housing of the joint motor.

[0019] Figure 4 It is a schematic diagram of the intermediate heat dissipation core structure.

[0020] Figure 5 It is a schematic diagram of the liquid cooling pipe.

[0021] Figure 6 It is a schematic diagram of the coil heat conductor.

[0022] Figure 7 It is a schematic diagram of the tail heat dissipation core structure.

[0023] Figure 8 It is a schematic diagram of the Gyroid cell.

[0024] In the figure: 1 - outer frame, 101 - sandwich cylindrical shell, 102 - cooling liquid hole Ⅰ, 2 - intermediate heat dissipation core structure, 201 - cooling liquid hole Ⅱ, 3 - liquid cooling pipe, 4 - coil heat conductor, 5 - motor coil, 6 - coil tail heat conductor, 7 - tail heat dissipation core structure, 8 - tail seal ring, 9 - output shaft seal ring, 10 - output end cover, 11 - Gyroid cell. Detailed Implementation Modes

[0025] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that for the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention. In addition, for terms such as "first", "second", "third", they are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, for terms such as "installation", "connection", "coupling", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] An integrated lightweight dual-output motor with heat dissipation function, comprising a motor housing, characterized in that: the motor housing includes an outer frame 1, and the outer frame 1 includes two sandwich cylindrical shells 101 arranged back to back; the wall surface of the sandwich cylindrical shell 101 is a sandwich structure, and an intermediate heat dissipation core structure 2 is provided in the sandwich cavity of the sandwich cylindrical shell 101, and both ends of the intermediate heat dissipation core structure 2 are exposed to the outside; the intermediate heat dissipation core structure 2 is integrally in the shape of a thin-walled cylindrical body structure, and the wall surface of the thin-walled cylindrical body structure is composed of Gyroid cells 11; cooling liquid holes I 102 are provided on the wall surface of the sandwich cylindrical shell 101, and cooling liquid holes II 201 communicated with the cooling liquid holes I 102 are provided on the intermediate heat dissipation core structure 2, and the cooling liquid holes I

[0029] 102 and the cooling liquid holes II 201 are used for the input and output of the cooling liquid;

[0030] The inner wall of each sandwich cylindrical shell 101 is provided with a liquid cooling pipe 3. The liquid cooling pipe 3 is a spiral coil pipe, and both ends of the spiral coil pipe are provided with openings for the inlet and outlet of the cooling liquid; an electric motor coil 5 is arranged inside the liquid cooling pipe 3; one end of the two sandwich cylindrical shells 101 away from each other is open, and an output end cover 10 is arranged at the opening; a coil tail heat conductor 6 is arranged at one end of the two sandwich cylindrical shells 101 close to each other. The coil tail heat conductor 6 is a thin-walled cylinder and is made of a high thermal conductivity material. The coil tail heat conductor 6 can absorb the heat generated at the tail of the electric motor coil 5; a tail heat dissipation core structure 7 is arranged between the two sandwich cylindrical shells 101. The tail heat dissipation core structure 7 is a thin plate structure. Since this structure needs to have a good heat dissipation effect, it is composed of Gyroid cells 11, and the outer peripheral edge of the tail heat dissipation core structure 7 is exposed to the outside.

[0031] The Gyroid cell 11 described in the present invention is called a minimal surface cell in the mathematical concept. The characteristic of this cell is that it has very good heat transfer performance. Therefore, in the embodiment of the present invention, the Gyroid cell 11 is used to enhance the heat dissipation performance of the motor.

[0032] The liquid cooling pipe 3 described in the present invention is composed of a circle of hollow pipes with the same diameter, and both ends are open for the inlet and outlet of the cooling liquid.

[0033] The present invention adopts an integrated design method for the joint motor housing, and realizes the integrated molding of various complex components such as the porous structure and the liquid cooling pipe through an additive manufacturing process. Make full use of the advantages of the porous structure Gyroid cell, and effectively improve the heat dissipation performance of the joint motor through the heat dissipation method of the coil heat conductor - liquid cooling pipe - intermediate heat dissipation core structure. Moreover, the end face of the intermediate heat dissipation core structure is directly in contact with the air and can release heat to the air in time. Similarly, the circumferential surface of the tail heat dissipation core structure is directly in contact with the air and can release heat to the air in time. In addition, for the lightweight design of the joint motor structure, a lattice structure is designed for the intermediate entity of the joint motor housing part, which greatly reduces the mass of the outer frame body and the tail structure.

[0034] Specifically, please refer to Figures 1 to 7 As shown, an integrated lightweight dual-output motor with a heat dissipation function includes an outer frame body 1, an intermediate heat dissipation core structure 2, a liquid cooling pipe 3, a coil heat conductor 4, an electric motor coil 5, a coil tail heat conductor 6, a tail heat dissipation core structure 7, a tail sealing ring 8, an output shaft sealing ring 9, an output end cover 10, and a Gyroid cell 11. Refer to Figure 1 and Figure 2, the outer frame body 1 is a cylindrical sandwich structure. The outer frame body 1 is composed of two identical sandwich cylindrical shells 101. Each sandwich cylindrical shell 101 is provided with cooling liquid holes Ⅰ102 on the side for the input and output of cooling liquid. The circumferential middle sandwich layer of each sandwich cylindrical shell 101 is the placement position of the middle heat dissipation core structure 2. There is a space left at the tails of the two sandwich cylindrical shells 101 for the placement of the tail heat dissipation core structure 7 and the coil tail heat conductor 6. Refer to Figure 2 , the middle heat dissipation core structure 2 is a thin-walled cylinder structure. Since this structure needs to have good heat dissipation effect, the middle heat dissipation core structure 2 is composed of Gyroid cells 11. The Gyroid cell 11 is called a minimal surface cell in the mathematical concept. The characteristic of this cell is that it has very good heat transfer performance. Therefore, in the embodiment of the present invention, the Gyroid cell 11 is used to enhance the heat dissipation performance of the motor. The middle heat dissipation core structure 2 is provided with cooling liquid holes Ⅱ201 for the inlet and outlet of the cooling liquid of the liquid cooling pipe 3. Refer to Figure 5 , the liquid cooling pipe 3 is composed of a circle of hollow circular pipes with the same diameter, and both ends are open for the inlet and outlet of the cooling liquid. Refer to Figure 6 , the coil heat conductor 4 is a thin-walled cylinder, and this part is made of a high thermal conductivity material and can quickly absorb the heat generated by the motor coil 5. The coil tail heat conductor 6 is a thin-walled cylinder, and this part is made of a high thermal conductivity material and can quickly absorb the heat generated by the tail of the motor coil 5. Refer to Figure 7 , the tail heat dissipation core structure 7 is a thin plate structure. Since this structure needs to have good heat dissipation effect, the middle heat dissipation core structure 2 is composed of Gyroid cells 11.

[0035] Furthermore, the heat generated by the motor coil 5 is mainly concentrated on the circumferential surface of the motor coil 5. Therefore, in the embodiment of the present invention, a coil heat conductor 4 is installed on the circumferential outer surface of the motor coil 5. This coil heat conductor 4 is made of a material with high thermal conductivity performance, so as to be able to conduct the generated heat to the inner cylinder of the outer frame body 1 in time.

[0036] Furthermore, the outer frame body 1, the middle heat dissipation core structure 2, the liquid cooling pipe 3, the tail heat dissipation core structure 7, and the coil tail heat conductor 6 adopt an integrated design. The liquid cooling pipe 3 is in full contact with the inner cylindrical surface of the outer frame body 1. The middle heat dissipation core structure 2 is placed at the sandwich core of the outer frame body 1. Most of the heat generated during the operation of the motor coil 5 is conducted out through the coil heat conductor 4. The inside of the liquid cooling pipe 3 is filled with circulating cooling liquid, which conducts the heat to the inner cylindrical surface of the outer frame body 1. The inner cylindrical surface of the outer frame body 1 is a thin-walled metal structure with good heat conduction performance. Furthermore, the middle heat dissipation core structure 2 is composed of metal Gyroid cells 11, which has very good heat dissipation performance, so that most of the heat generated during the operation of the motor coil 5 can be released into the air through the end face of the middle heat dissipation core structure 2. Furthermore, the coil tail heat conductor 6 adopts a metal thin-walled structure and is in full contact with the tail of the motor coil 5 to ensure that the heat at the tail of the motor coil 5 can be conducted to the tail heat dissipation core structure 7, and similarly, the heat at the tail of the motor coil 5 can be released into the air through the circumferential surface of the tail heat dissipation core structure 7.

[0037] Furthermore, in order to carry out lightweight design and manufacturing on the joint motor structure, in the embodiment of the present invention, the outer frame body 1 of the joint motor adopts a sandwich porous structure filling method. The Gyroid cell 11 not only has good heat dissipation performance, but also the porous structure filling method using the Gyroid cell 11 is of great help to the lightweight design of the metal shell of the joint motor instead of solid filling. Similarly, the tail heat dissipation core structure 7 adopts the porous structure filling method using the Gyroid cell 11 instead of solid filling, which helps the lightweight design of the joint motor.

[0038] Furthermore, structures such as the outer frame body 1, the middle heat dissipation core structure 2, the liquid cooling pipe 3, the coil tail heat conductor 6, and the tail heat dissipation core structure 7 adopt an integrated design, and the integrated manufacturing and forming are realized by using the additive manufacturing technology process, which improves the forming cost and assembly efficiency between components.

[0039] Furthermore, since the middle heat dissipation core structure 2 and the tail heat dissipation core structure 7 both adopt porous structures, which helps to improve the heat dissipation performance and lightweight of the joint motor. However, similarly, due to the non-closed nature of the porous structure, the design of the motor seal and waterproof performance needs to be considered. Therefore, the coil tail heat conductor 6 is placed between the tail of the motor coil 5 and the tail heat dissipation core structure 7, and the tail sealing ring 8 is distributed at the installation hole to improve the sealing performance of the tail part. Similarly, the output shaft sealing ring 9 is also used at the output shaft to carry out dust and waterproof sealing treatment on the inside of the motor.

[0040] The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept of the present invention.

Claims

1. An integrated lightweight dual-output motor with heat dissipation function, comprising a motor housing, characterized in that: The motor housing includes an outer frame body (1), and the outer frame body (1) includes two sandwich cylindrical shells (101) arranged back to back; the wall surface of the sandwich cylindrical shell (101) is a sandwich structure, and an intermediate heat dissipation core structure (2) is provided in the sandwich cavity of the sandwich cylindrical shell (101), and both ends of the intermediate heat dissipation core structure (2) are exposed to the outside; the intermediate heat dissipation core structure (2) is integrally in a thin-walled cylindrical structure, and the wall surface of the thin-walled cylindrical structure is composed of Gyroid cells (11); cooling liquid holes I (102) are provided on the wall surface of the sandwich cylindrical shell (101), and cooling liquid holes II (201) communicated with the cooling liquid holes I (102) are provided on the intermediate heat dissipation core structure (2), and the cooling liquid holes I (102) and the cooling liquid holes II (201) are used for the input and output of cooling liquid; A liquid cooling pipeline (3) is provided on the inner wall of each sandwich cylindrical shell (101), the liquid cooling pipeline (3) is a spiral coil pipe, and openings for the inlet and outlet of cooling liquid are provided at both ends of the spiral coil pipe; a motor coil (5) is provided inside the liquid cooling pipeline (3); one end of the two sandwich cylindrical shells (101) away from each other is open, and an output end cover (10) is provided at the opening; a coil tail heat conductor (6) is provided at one end of the two sandwich cylindrical shells (101) close to each other, the coil tail heat conductor (6) is a thin-walled cylinder, the coil tail heat conductor (6) is made of a high heat conduction material, and the coil tail heat conductor (6) can absorb the heat generated at the tail of the motor coil (5); a tail heat dissipation core structure (7) is provided between the two sandwich cylindrical shells (101), the tail heat dissipation core structure (7) is a thin plate structure, and the outer peripheral edge of the tail heat dissipation core structure (7) is exposed to the outside.

2. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, characterized in that: A coil heat conductor (4) is provided between the liquid cooling pipeline (3) and the motor coil (5), the coil heat conductor (4) is made of a high heat conduction material, and the coil heat conductor (4) can quickly absorb the heat generated by the motor coil 5 and conduct it to the sandwich cylindrical shell (101).

3. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, characterized in that: The two sandwich cylindrical shells (101), the intermediate heat dissipation core structure (2), the liquid cooling pipeline (3), the tail heat dissipation core structure (7) and the coil tail heat conductor (6) are of an integral structure.

4. The integrated lightweight dual-output motor with heat dissipation function according to claim 3, wherein: The two sandwich cylindrical shells (101), the intermediate heat dissipation core structure (2), the liquid cooling pipeline (3), the tail heat dissipation core structure (7) and the coil tail heat conductor (6) are formed into an integral structure by additive manufacturing technology.

5. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, characterized in that: The intermediate heat dissipation core structure (2) is filled in the sandwich cavity of the sandwich cylindrical shell (101) by the porous structure of a plurality of Gyroid cells (11); the tail heat dissipation core structure (7) is filled with the porous structure of Gyroid cells (11) to replace the solid filling, which helps the lightweight design of the joint motor.

6. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, characterized in that: The coil tail heat conductor (6) is arranged between the tail of the motor coil (5) and the tail heat dissipation core structure (7), and a tail sealing ring (8) is provided at the installation hole opened on the outer frame body (1).

7. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, characterized in that: The motor shaft of the double-output motor extends out from the output end cover (10), and an output shaft sealing ring (9) is provided between the motor shaft and the output end cover (10).

8. The integrated lightweight dual-output motor with heat dissipation function according to claim 2, wherein: The liquid cooling pipe (3) is in full contact with the inner wall surface of the outer frame body (1), and the inside of the liquid cooling pipe (3) is filled with circulating cooling liquid; the inner wall surface of the outer frame body (1) is a thin-walled metal structure, and most of the heat generated during the operation of the motor coil (5) is transmitted to the inner wall surface of the outer frame body (1) through the coil heat conductor (4) and the liquid cooling pipe (3).

9. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, wherein: The intermediate heat dissipation core structure (2) is composed of metal Gyroid cells 11 to release most of the heat generated during the operation of the motor coil (5) to the air through the end face of the intermediate heat dissipation core structure (2).

10. The integrated lightweight dual-output motor with heat dissipation function according to claim 1, characterized in that: The coil tail heat conductor (6) adopts a metal thin-walled structure, and the coil tail heat conductor (6) is in full contact with the tail of the motor coil (5) to ensure that the heat at the tail of the motor coil (5) can be conducted to the tail heat dissipation core structure (7); the coil tail heat conductor (6) can release the heat at the tail of the motor coil (5) to the air through the circumferential surface of the tail heat dissipation core structure (7).

Images