Electric spindle with rear motor

Abstract

The utility model relates to the technical field of motors, and discloses a motor rear-mounted motorized spindle which comprises a main shell and an output shaft arranged in the main shell, a tail shell is fixedly installed on one side of the main shell, a rotating joint is fixedly installed at the end of the output shaft, the rotating joint and the inner wall of the tail shell are rotatably installed, a U-shaped groove and a connecting groove are formed in the output shaft, and the U-shaped groove is connected with the connecting groove. The connecting groove and the U-shaped groove are communicated with each other, the connecting groove extends to the outer wall of the circumferential surface of the output shaft, and the outer wall, located on the two sides of the connecting groove, of the output shaft is provided with the movable sealing pieces, the tail shell and the end of the output shaft can be rotationally connected through the rotating connector, and the liquid inlet pipe can achieve the liquid inlet effect on the U-shaped groove in the output shaft. The liquid in the U-shaped groove is conveyed into the connecting groove, the two dynamic sealing pieces can play a role in dynamic sealing on the output shaft and the tail shell at the connecting groove, the liquid in the connecting groove can be conveniently discharged from the liquid outlet hole, and then the effective heat dissipation effect on the output shaft is effectively achieved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a rear-mounted electric spindle for a motor. Background Technology

[0002] An electric spindle is a type of built-in motor. It is a new technology that integrates the machine tool spindle and the spindle motor in the field of CNC machine tools. Electric spindles are commonly used in industrial machinery and equipment and are a key component that can provide power and control speed.

[0003] Currently, the cooling method for electric spindles involves setting up a cooling chamber in the inner wall of the housing for heat dissipation. However, the output shaft generates heat when rotating, and since the output shaft is located in the center, its heat dissipation effect is poor. Utility Model Content

[0004] The purpose of this utility model is to provide a rear-mounted electric spindle, which solves the problem that the heat dissipation method of the electric spindle is to set a cooling cavity in the inner wall of the housing for cooling and heat dissipation, but the output shaft generates heat when rotating, and the output shaft is located in the center position, so its heat dissipation effect is poor.

[0005] This application provides a rear-mounted electric spindle for a motor, including a main housing and an output shaft disposed inside the main housing. A tail housing is fixedly installed on one side of the main housing, and a rotary joint is fixedly installed at the end of the output shaft. The rotary joint is rotatably installed on the inner wall of the tail housing. A U-shaped groove and a connecting groove are formed inside the output shaft. The connecting groove and the U-shaped groove are interconnected. The connecting groove extends to the outer wall of the circumferential surface of the output shaft. Dynamic seals are respectively installed on the outer walls of the output shaft located on both sides of the connecting groove. The dynamic seals are in contact with the inner wall of the tail housing. A liquid outlet is formed on the outer wall of the tail housing located between the two dynamic seals. A liquid inlet is formed on the outer wall of one side of the tail housing. The liquid inlet is connected to the liquid inlet end of the U-shaped groove of the output shaft.

[0006] By adopting the above technical solution, the rotary joint can provide a rotatable connection between the tail housing and the end of the output shaft, while the liquid inlet pipe can provide a liquid inlet to the U-shaped groove inside the output shaft. The liquid inside the U-shaped groove is then transported to the connecting groove, and the two dynamic seals can provide a dynamic seal for the output shaft and tail housing at the connecting groove, facilitating the discharge of liquid inside the connecting groove from the liquid outlet hole, thereby effectively dissipating heat from the output shaft.

[0007] Optionally, an inlet pipe is rotatably mounted on the outer wall of the tail shell located on one side of the inlet port.

[0008] By adopting the above technical solution, the tail shell can fix the liquid inlet pipe, the liquid inlet pipe can add liquid to the inside of the liquid inlet hole, and the liquid inlet pipe can be connected to an external equipment liquid supply device.

[0009] Optionally, an outlet pipe is installed on the outer wall of the tail shell located above the outlet hole.

[0010] By adopting the above technical solution, the tail shell can fix the liquid outlet pipe, while the liquid outlet pipe can discharge liquid, and the liquid outlet pipe can be connected to the liquid storage mechanism of an external device.

[0011] Optionally, a front shell is fixedly installed on the side of the main shell away from the tail shell, and bearings are respectively installed on the inner wall of the front shell and the inner wall of the main shell, with the inner ring wall of each bearing being installed with the output shaft.

[0012] By adopting the above technical solution, the main housing can fix the front housing, while each set of bearings can rotatably connect the front housing, the main housing, and the output shaft.

[0013] Optionally, a cooling cavity is provided in the inner wall of the main shell.

[0014] By adopting the above technical solution, the opening of the cooling chamber can play a role in cooling the inside of the main shell.

[0015] Optionally, the outer wall of the main shell has two circular holes, and two connecting pipes are installed on the outer wall of the main shell above the two circular holes.

[0016] By adopting the above technical solution, the two circular holes facilitate the discharge and feed of liquid, while the two connecting pipes serve as the liquid inlet and outlet, respectively.

[0017] Optionally, a stator is installed on the inner wall of the main housing.

[0018] By adopting the above technical solution, the stator can be installed through the main shell.

[0019] Optionally, a rotor is mounted on the inner wall of the stator, and the inner wall of the rotor is fixedly mounted to the output shaft.

[0020] By adopting the above technical solution, the output shaft and rotor can be easily rotated through the cooperation of the stator, rotor and output shaft.

[0021] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0022] The technical solution of this application uses a rotary joint to provide a rotatable connection between the tail housing and the end of the output shaft, while the liquid inlet pipe provides a liquid inlet to the U-shaped groove inside the output shaft. The liquid inside the U-shaped groove is then transported to the connecting groove, and the two dynamic seals provide a dynamic seal for the output shaft and tail housing at the connecting groove, facilitating the discharge of liquid from the liquid outlet hole inside the connecting groove, thereby effectively dissipating heat from the output shaft. Attached Figure Description

[0023] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a front view schematic diagram of a rear-mounted electric spindle according to the present invention;

[0025] Figure 2 This is a front view of a rear-mounted electric spindle according to the present invention.

[0026] Figure 3 This utility model relates to a rear-mounted electric spindle for motors. Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This utility model relates to a rear-mounted electric spindle for motors. Figure 2 Enlarged view of section B in the middle.

[0028] In the diagram: 1. Main housing; 2. Front housing; 3. Tail housing; 4. Output shaft; 5. U-shaped groove; 6. Connecting groove; 7. Dynamic seal; 8. Liquid inlet; 9. Rotary joint; 10. Liquid inlet pipe; 11. Liquid outlet; 12. Liquid outlet pipe; 13. Cooling chamber; 14. Circular hole; 15. Connecting pipe; 16. Stator; 17. Rotor; 18. Bearing. Detailed Implementation

[0029] Please see Figure 1-4 This utility model provides a technical solution: a rear-mounted electric spindle of a motor, including a main housing 1 and an output shaft 4 disposed inside the main housing 1. A tail housing 3 is fixedly installed on one side of the main housing 1. A rotary joint 9 is fixedly installed at the end of the output shaft 4. The rotary joint 9 is rotatably installed with the inner wall of the tail housing 3. A U-shaped groove 5 and a connecting groove 6 are opened inside the output shaft 4. The connecting groove 6 and the U-shaped groove 5 are interconnected. The connecting groove 6 extends to the outer wall of the circumferential surface of the output shaft 4. Dynamic seals 7 are respectively installed on the outer walls of the output shaft 4 located on both sides of the connecting groove 6. The dynamic seals 7 are in contact with the inner wall of the tail housing 3. A liquid outlet hole 11 is opened on the outer wall of the tail housing 3 located between the two dynamic seals 7. A liquid inlet hole 8 is opened on the outer wall of one side of the tail housing 3. The liquid inlet hole 8 is connected to the liquid inlet end of the U-shaped groove 5 of the output shaft 4.

[0030] A front shell 2 is fixedly installed on the side of the main shell 1 away from the tail shell 3. Bearings 18 are installed on the inner wall of the front shell 2 and the inner wall of the main shell 1 respectively. The inner ring wall of each bearing 18 is installed with the output shaft 4.

[0031] In the technical solution of this utility model, the rotary joint 9 can provide a rotatable connection between the tail shell 3 and the end of the output shaft 4, while the liquid inlet pipe 10 can provide a liquid inlet to the U-shaped groove 5 inside the output shaft 4. The liquid inside the U-shaped groove 5 is transported to the connecting groove 6, and the two dynamic seals 7 can provide a dynamic seal between the output shaft 4 and the tail shell 3 at the connecting groove 6, so that the liquid inside the connecting groove 6 can be discharged from the liquid outlet 11, thereby effectively dissipating heat from the output shaft 4. The rotary joint 9 can be welded and fixed to the end of the output shaft 4, or other fixed installation methods, so that the output shaft 4 can drive the rotary joint 9 to rotate, and at the same time bear the torque and axial force transmitted by the output shaft 4. The rotatable connection between the rotary joint 9 and the inner wall of the tail shell 3 is achieved by bearings or sealing rings to prevent liquid leakage.

[0032] In addition, the main housing 1 can fix the front housing 2, and each set of bearings 18 can rotatably connect the front housing 2, the main housing 1 and the output shaft 4 respectively.

[0033] In the technical solution of this utility model, such as Figure 2 As shown, a cooling chamber 13 is provided in the inner wall of the main shell 1. The cooling chamber 13 can cool the inside of the main shell 1. Two circular holes 14 are provided in the outer wall of the main shell 1. Two connecting pipes 15 are installed on the outer wall of the main shell 1 above the two circular holes 14. The two circular holes 14 can facilitate the discharge and feed of liquid, respectively, while the two connecting pipes 15 can be used for liquid inlet and liquid outlet, respectively.

[0034] In the technical solution of this utility model, such as Figure 2 As shown, a stator 16 is installed on the inner wall of the main housing 1. The main housing 1 can be used to install the stator 16. A rotor 17 is installed on the inner wall of the stator 16. The inner wall of the rotor 17 is fixedly installed with the output shaft 4. The cooperation of the stator 16, the rotor 17 and the output shaft 4 can facilitate the rotation of the output shaft 4 and the rotor 17.

[0035] In the technical solution of this utility model, such as Figure 2 As shown, an inlet pipe 10 is rotatably installed on the outer wall of the tail shell 3 located on one side of the inlet hole 8. The tail shell 3 can fix the inlet pipe 10, which can add liquid to the inside of the inlet hole 8. The inlet pipe 10 can be connected to an external equipment liquid supply device. An outlet pipe 12 is installed on the outer wall of the tail shell 3 located above the outlet hole 11. The tail shell 3 can fix the outlet pipe 12, which can discharge liquid. The outlet pipe 12 can be connected to an external equipment liquid storage mechanism.

[0036] In use, the two circular holes 14 facilitate the feeding and discharging of liquid, while the two connecting pipes 15 serve as the liquid inlet and outlet. The cooling chamber 13 facilitates liquid flow, allowing the liquid to cool the interior of the main housing 1. The stator 16, rotor 17, and output shaft 4 work together to facilitate the rotation of the output shaft 4 and rotor 17. The bearing 18 provides rotational support for the output shaft 4. The liquid inlet pipe 10 allows liquid to enter through the liquid inlet hole 8. The rotary joint 9 provides a rotatable connection between the tail housing 3 and the end of the output shaft 4. The liquid inlet pipe 10 allows liquid to enter through the U-shaped groove 5 inside the output shaft 4. The liquid inside the U-shaped groove 5 is transported to the connecting groove 6. The two dynamic seals 7 provide a dynamic seal for the output shaft 4 and tail housing 3 at the connecting groove 6, allowing the liquid inside the connecting groove 6 to drain out through the liquid outlet hole 11, thereby effectively dissipating heat from the output shaft 4.

Claims

1. A rear-mounted electric spindle, characterized in that: The device includes a main housing (1) and an output shaft (4) disposed inside the main housing (1). A tail housing (3) is fixedly installed on one side of the main housing (1). A rotary joint (9) is fixedly installed at the end of the output shaft (4). The rotary joint (9) is rotatably installed on the inner wall of the tail housing (3). A U-shaped groove (5) and a connecting groove (6) are provided inside the output shaft (4). The connecting groove (6) and the U-shaped groove (5) are interconnected. The connecting groove (6) extends to the outer wall of the circumferential surface of the output shaft (4). Dynamic seals (7) are respectively installed on the outer walls of the output shaft (4) on both sides of the connecting groove (6). The dynamic seals (7) are in contact with the inner wall of the tail housing (3). An outlet hole (11) is provided on the outer wall of the tail housing (3) between the two dynamic seals (7). An inlet hole (8) is provided on the outer wall of one side of the tail housing (3). The inlet hole (8) is connected to the inlet end of the U-shaped groove (5) of the output shaft (4).

2. The rear-mounted electric spindle according to claim 1, characterized in that, An inlet pipe (10) is rotatably mounted on the outer wall of the tail shell (3) located on one side of the inlet hole (8).

3. The rear-mounted electric spindle according to claim 2, characterized in that, An outlet pipe (12) is installed on the outer wall of the tail shell (3) located above the outlet hole (11).

4. The rear-mounted electric spindle according to claim 1, characterized in that, A front shell (2) is fixedly installed on the side of the main shell (1) away from the tail shell (3). Bearings (18) are installed on the inner wall of the front shell (2) and the inner wall of the main shell (1), respectively. The inner ring wall of each bearing (18) is installed with the output shaft (4).

5. A rear-mounted electric spindle according to claim 4, characterized in that, A cooling cavity (13) is provided in the inner wall of the main shell (1).

6. A rear-mounted electric spindle according to claim 5, characterized in that, Two circular holes (14) are opened on the outer wall of the main shell (1), and two connecting pipes (15) are installed on the outer wall of the main shell (1) above the two circular holes (14).

7. A rear-mounted electric spindle according to claim 6, characterized in that, The inner wall of the main shell (1) is fitted with a stator (16).

8. A rear-mounted electric spindle according to claim 7, characterized in that, The inner wall of the stator (16) is fitted with a rotor (17), and the inner wall of the rotor (17) is fixedly installed with the output shaft (4).

Images