Heat dissipation mechanism for heat dissipation of mechanical arm joint brake pad

Abstract

The utility model discloses a heat dissipation mechanism for heat dissipation of a brake pad of a mechanical arm joint, which belongs to the technical field of heat dissipation structures of brake pads of mechanical arm joints and comprises a plurality of fan blades, the fan blades are used for being mounted in a motor casing, and a stator of a motor is fixedly connected in the motor casing. The plurality of fan blades are circumferentially wound outside a rotating shaft of the motor and are connected with the rotating shaft of the motor; a brake assembly is arranged in the motor shell, is used for reducing the speed of a rotating shaft of the motor, and is positioned between a stator of the motor and the plurality of fan blades; the end, close to the fan blades, of the motor shell is opened and fixedly connected with a motor cover, and a plurality of air inlet holes and a plurality of heat dissipation holes are formed in the motor cover. The fan blades can achieve rotary heat dissipation without extra power, the manufacturing cost is low, the heat dissipation effect is good, the overall structure is compact, the integration degree is high, and miniaturization of the mechanical arm can be achieved easily.

Description

Technical Field

[0001] This utility model relates to the technical field of brake pad heat dissipation structure for robotic arm joints, and in particular to a heat dissipation mechanism for cooling brake pads of robotic arm joints. Background Technology

[0002] The purpose of installing a braking structure in the joints of a robotic arm is to prevent the arm from continuing to move without receiving correct commands, thus maintaining motion accuracy. During operation, the brake pads in the robotic arm joints generate heat, causing the temperature to rise. When the brake pad temperature is too high, the braking force decreases, affecting the reliability of the braking system. Therefore, improving the heat dissipation capacity of the brake pads can effectively improve the braking performance of the robotic arm joints.

[0003] Common heat dissipation methods currently include:

[0004] Natural cooling: The joints of the robotic arm are made of metal, which naturally dissipates heat. This heat dissipation method is relatively simple and inexpensive, but its heat dissipation effect is poor, making it suitable for low-load and low-frequency usage scenarios.

[0005] Forced air cooling: This method involves adding a motor-driven cooling fan to blow cool air into the brake pads, accelerating airflow. This cooling method is highly efficient and suitable for high-load applications. However, the additional cooling structure increases operating costs, occupies limited space in the robotic arm joints, and hinders the miniaturization of the robotic arm.

[0006] Therefore, a heat dissipation mechanism for cooling the brake pads of robotic arm joints is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a heat dissipation mechanism for cooling brake pads of robotic arm joints, aiming to solve or improve at least one of the aforementioned technical problems.

[0008] To achieve the above objectives, this utility model provides the following solution: This utility model provides a heat dissipation mechanism for cooling brake pads of a robotic arm joint, comprising a plurality of fan blades, the fan blades being installed inside a motor housing, the motor housing containing a motor stator, the plurality of fan blades being circumferentially arranged around the motor shaft and connected to the motor shaft; a brake assembly is provided inside the motor housing, the brake assembly being used to decelerate the motor shaft, the brake assembly being located between the motor stator and the plurality of fan blades;

[0009] The motor housing has an opening at one end near the fan blade and is fixedly connected to a motor cover. The motor cover has several air inlets and several heat dissipation holes.

[0010] Optionally, a number of the air inlets are formed on the end face of the motor cover, and a number of the heat dissipation holes are formed on the side wall of the motor cover and are arranged circumferentially around the side wall of the motor cover.

[0011] Optionally, a sleeve is fixedly fitted around the outside of the motor shaft, and a plurality of fan blades are circumferentially wound around the outside of the sleeve and fixedly connected to the outer wall of the sleeve.

[0012] Optionally, the brake assembly includes brake pads and a brake disc, the brake pads and the brake disc being located between the sleeve and the stator of the motor, the brake disc being fixedly sleeved outside the motor shaft, the brake pads having a through hole in the middle, the motor shaft passing through the through hole, and a gap between the motor shaft and the through hole, and a drive assembly being provided on the inner wall of the motor housing, the drive assembly being connected to the brake pads for driving the brake pads closer to or away from the brake disc.

[0013] Optionally, the drive assembly includes a brake pad pressure plate, which is fixedly connected to the end of the brake pad away from the brake disc. A plurality of springs are fixedly connected between the end of the brake pad pressure plate away from the brake pad and the inner wall of the motor housing. An electromagnet is fixedly connected to the inner wall of the motor housing, and the electromagnet attracts the brake pad pressure plate when energized.

[0014] Optionally, the motor shaft is a hollow shaft.

[0015] This utility model discloses the following technical effects: Several fan blades are circumferentially arranged around the motor shaft. When the motor is working, the rotation of the motor shaft drives the fan blades to rotate synchronously, thereby drawing in external cold air through the air inlet into the motor housing, and expelling the hot air inside the motor housing through the heat dissipation holes, thus realizing the circulation of air inside the motor housing and achieving heat dissipation of the brake assembly. The fan blades in this device can achieve rotation and heat dissipation without additional power, resulting in low manufacturing cost, good heat dissipation effect, and a compact overall structure with high integration, which is conducive to the miniaturization of the robotic arm. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the motor housing and motor cover in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the fan blade and brake assembly in this utility model;

[0019] Figure 3This is a schematic diagram of the structure of the fan blade, brake assembly and motor in this utility model.

[0020] In the diagram: 1. Fan blade; 2. Motor housing; 3. Motor; 4. Motor cover; 5. Air inlet; 6. Heat dissipation hole; 7. Sleeve; 8. Brake pad; 9. Brake disc; 10. Brake pad pressure plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In existing technologies, robotic arm joints include rotary joints, linear joints, rolling joints, and sub-rotor joints. Rotary joints are one of the most basic joint types in robotic arms. Because they can rotate around their axis, they can be used to transfer objects between two planes. Rotary joints typically consist of a motor, reducer, encoder, and transmission device. Due to their simple structure and ability to withstand large loads in all directions, they are widely used in many industrial applications. The heat generated by the brake pads of a robotic arm joint mainly comes from three sources: the heat transferred from the motor to the brake pads when the joint motor is working; the heat dissipated by the brake pad coil itself; and the heat generated by the friction between the brake pads and the brake disc when the brake is activated.

[0024] An electromagnet is a device that generates electromagnetic fields when an electric current flows through it. A conductive winding, matched to the power of the current, is wound around an iron core. This current-carrying coil exhibits magnetism like a magnet, hence the name electromagnet. We usually make it in a bar or horseshoe shape to make the iron core easier to magnetize. Furthermore, to ensure the electromagnet demagnetizes immediately when the power is turned off, we often use soft iron or silicon steel materials that demagnetize quickly. Such electromagnets are magnetic when energized, and the magnetism disappears when the power is turned off. Electromagnets have extremely wide applications in our daily lives.

[0025] Reference Figures 1-3This utility model provides a heat dissipation mechanism for cooling the brake pads of a robotic arm joint, including several fan blades 1, which are installed inside a motor housing 2. The stator of a motor 3 is fixed inside the motor housing 2. The several fan blades 1 are circumferentially arranged around the rotating shaft of the motor 3 and connected to the rotating shaft of the motor 3. A brake assembly is provided inside the motor housing 2. The brake assembly is used to decelerate the rotating shaft of the motor 3. The brake assembly is located between the stator of the motor 3 and the several fan blades 1.

[0026] The motor housing 2 has an opening at one end near the fan blade 1 and is fixed with a motor cover 4. The motor cover 4 has several air inlets 5 and several heat dissipation holes 6.

[0027] This embodiment involves a robotic arm rotary joint; a flange is rotatably connected to the end of the motor housing 2 away from the fan blades 1, and the end of the motor shaft away from the fan blades 1 is fixedly connected to the flange. The flange connects the motor shaft of the motor 3 to the external structure, thereby driving the external structure to rotate.

[0028] Several fan blades 1 are circumferentially arranged around the shaft of motor 3. When motor 3 is working, the shaft of motor 3 rotates, driving several fan blades 1 to rotate synchronously, thereby drawing in external cold air through air inlet 5 into motor housing 2. Hot air inside motor housing 2 is discharged through heat dissipation hole 6, realizing air circulation inside motor housing 2, thereby realizing heat dissipation of brake components. The fan blades 1 in this device can achieve rotation and heat dissipation without additional power, with low manufacturing cost, good heat dissipation effect, and compact overall structure with high integration, which is conducive to realizing miniaturization of robotic arms.

[0029] In some alternative embodiments, a plurality of air inlets 5 are formed on the end face of the motor cover 4, and a plurality of heat dissipation holes 6 are formed on the side wall of the motor cover 4 and are arranged circumferentially around the side wall of the motor cover 4.

[0030] Several air inlets 5 are located in the middle of the end face of the motor cover 4. When the motor 3 is working, several fan blades 1 rotate, and hot air is discharged through the heat dissipation holes 6 along the direction of the fan blades 1. At the same time, when the fan blades 1 rotate, a negative pressure is generated at the center of the shaft of the motor 3, and external cold air enters from the air inlets 5 to achieve air circulation and thus achieve heat dissipation.

[0031] In some alternative embodiments, a sleeve 7 is fixedly sleeved on the outer side of the rotating shaft of the motor 3, and a plurality of fan blades 1 are circumferentially wound around the outside of the sleeve 7 and fixedly connected to the outer wall of the sleeve 7.

[0032] In some optional embodiments, the brake assembly includes a brake pad 8 and a brake disc 9, which are located between the sleeve 7 and the stator of the motor 3. The brake disc 9 is fixedly sleeved on the outside of the rotating shaft of the motor 3. A through hole is provided in the middle of the brake pad 8, and the rotating shaft of the motor 3 passes through the through hole. There is a gap between the rotating shaft of the motor 3 and the through hole. A drive assembly is provided on the inner wall of the motor housing 2. The drive assembly is connected to the brake pad 8 and is used to drive the brake pad 8 to move closer to or away from the brake disc 9.

[0033] In some alternative embodiments, the drive assembly includes a brake pad pressure plate 10, which is fixedly connected to the end of the brake pad 8 away from the brake disc 9. The brake pad pressure plate 10 passes through the rotating shaft of the motor 3 and has a gap between it and the rotating shaft of the motor. A plurality of springs (not shown in the figure) are fixedly connected between the end of the brake pad pressure plate 10 away from the brake pad 8 and the inner wall of the motor housing 2. An electromagnet (not shown in the figure) is fixedly connected to the inner wall of the motor housing 2. When the electromagnet is energized, it attracts the brake pad pressure plate 10.

[0034] Brake pad 8 and brake pad pressure plate 10 are fixed with glue and cannot be separated. Brake disc 9, sleeve 7 and fan blade 1 are fixed as a whole. Thermal grease is applied between them to facilitate heat dissipation. When motor 3 rotates, it will drive brake disc 9 to rotate. When the brake is in working state, the electromagnet is de-energized and separates from brake pad pressure plate 10, so that brake pad 8 is tightly attached to brake disc 9 under the action of spring force, and the braking function is achieved by friction. When the brake is not working, the electromagnet is energized and attracts brake pad pressure plate 10, separating brake pad 8 from brake disc 9. A telescopic rod is installed inside the spring to control the extension and retraction direction of the spring.

[0035] In some alternative embodiments, the shaft of motor 3 is a hollow shaft.

[0036] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A heat dissipation mechanism for cooling brake pads of robotic arm joints, characterized in that: The device includes several fan blades (1), which are used to be installed inside a motor housing (2). The stator of a motor (3) is fixed inside the motor housing (2). The several fan blades (1) are circumferentially arranged around the rotating shaft of the motor (3) and connected to the rotating shaft of the motor (3). A brake assembly is provided inside the motor housing (2). The brake assembly is used to decelerate the rotating shaft of the motor (3). The brake assembly is located between the stator of the motor (3) and the several fan blades (1). The motor housing (2) has an opening at one end near the fan blade (1) and a motor cover (4) is fixedly attached thereto. The motor cover (4) has several air inlets (5) and several heat dissipation holes (6).

2. The heat dissipation mechanism for cooling the brake pads of a robotic arm joint according to claim 1, characterized in that: A number of air inlets (5) are formed on the end face of the motor cover (4), and a number of heat dissipation holes (6) are formed on the side wall of the motor cover (4) and are arranged circumferentially around the side wall of the motor cover (4).

3. The heat dissipation mechanism for cooling the brake pads of a robotic arm joint according to claim 1, characterized in that: The motor (3) has a sleeve (7) fixedly fitted on its shaft, and several fan blades (1) are circumferentially wrapped around the sleeve (7) and fixedly connected to the outer wall of the sleeve (7).

4. The heat dissipation mechanism for cooling the brake pads of a robotic arm joint according to claim 3, characterized in that: The brake assembly includes a brake pad (8) and a brake disc (9). The brake pad (8) and the brake disc (9) are located between the sleeve (7) and the stator of the motor (3). The brake disc (9) is fixedly sleeved outside the rotating shaft of the motor (3). A through hole is opened in the middle of the brake pad (8). The rotating shaft of the motor (3) passes through the through hole. There is a gap between the rotating shaft of the motor (3) and the through hole. A drive assembly is provided on the inner wall of the motor housing (2). The drive assembly is connected to the brake pad (8) and is used to drive the brake pad (8) to move closer to or away from the brake disc (9).

5. The heat dissipation mechanism for cooling the brake pads of a robotic arm joint according to claim 4, characterized in that: The drive assembly includes a brake pad pressure plate (10), which is fixedly connected to the end of the brake pad (8) away from the brake disc (9). A plurality of springs are fixedly connected between the end of the brake pad pressure plate (10) away from the brake pad (8) and the inner wall of the motor housing (2). An electromagnet is fixedly connected to the inner wall of the motor housing (2). When the electromagnet is energized, it attracts the brake pad pressure plate (10).

6. The heat dissipation mechanism for cooling the brake pads of a robotic arm joint according to claim 1, characterized in that: The shaft of the motor (3) is a hollow shaft.

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