Self-driven turntable rolling bearing

Abstract

The invention discloses a self-driven turntable rolling bearing, and belongs to the technical field of bearings. A self-driven rotating disc rolling bearing comprises a first ring body and a second ring body, the first ring body is rotationally connected with the second ring body, a plurality of first permanent magnets are annularly and fixedly installed on the end face of the first ring body at equal intervals, the magnetic poles of every two adjacent first permanent magnets are opposite, a coil is fixedly installed on the second ring body and extends to the position above the first permanent magnets, and the first permanent magnets are arranged on the coil. The coil is in clearance fit with the first permanent magnet; an annular mounting groove is formed between the first ring body and the second ring body, a retainer is arranged in the annular mounting groove, a plurality of pockets are formed in the retainer, a plurality of balls are rotatably mounted in the pockets, and an arc-shaped adjusting groove is formed in the first ring body. An external structure can be directly driven, the space utilization rate is reduced while the equipment moving precision is guaranteed, and miniaturization of medical equipment is facilitated.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and more specifically, to a self-driving rotary rolling bearing. Background Technology

[0002] With the rapid development of radiotherapy and diagnostic technologies, people have increasingly higher requirements for radiotherapy and diagnostic medical equipment, including its operational precision, speed, miniaturization, and simplification.

[0003] Currently, most large medical devices on the market use bearings to connect and provide rotational trajectories. However, bearings can only serve to connect and constrain the trajectory; additional power and motion transmission devices are needed for rotation. Most devices now use traditional mechanical transmission methods such as rotary motors with chains or gears. This method inevitably results in the large size and complexity of the entire medical device. At the same time, redundant transmission devices can introduce drawbacks such as gaps and backlashes that affect the accuracy of the device. These factors all affect the overall precision of the device, reduce space utilization, and compress the patient's treatment space.

[0004] With the development of technology, linear motors are gradually being recognized by the market. A linear motor is essentially a traditional rotary motor extended into a straight line. The winding coil generates mutual thrust with the magnet through a magnetic field, thereby reducing mechanical transmission components such as sprockets, chains, gears, and pulleys. However, linear motors can only provide thrust and still require guide rails to determine their motion trajectory. Moreover, most linear motors can only perform linear reciprocating motion. In view of this, we propose a self-driven rotary disc rolling bearing. Summary of the Invention

[0005] 1. Technical problems to be solved The purpose of this invention is to provide a self-driving rotary rolling bearing to solve the problems mentioned in the background art.

[0006] 2. Technical Solution This invention is achieved through the following technical solution: A self-driven turntable rolling bearing includes a first ring body and a second ring body, which are rotatably connected. A plurality of first permanent magnets are fixedly installed in an annular shape at equal intervals on the end face of the first ring body. The magnetic poles of two adjacent first permanent magnets are opposite. A coil is fixedly installed on the second ring body, and the coil extends above the first permanent magnets. The coil and the first permanent magnets are in clearance fit. An annular mounting groove is provided between the first ring body and the second ring body. A retainer is provided in the annular mounting groove. The retainer has multiple pockets. Multiple balls are rotatably installed in the pockets. An arc-shaped adjustment groove is provided on the first ring body. The adjustment groove is connected to the mounting groove. When the balls move to the adjustment groove, a gap is formed between them and the first ring body.

[0007] As an optional solution to the technical solution of this application, the ball bearing is provided with a second permanent magnet, and the adjustment groove spans at least two first permanent magnets.

[0008] As an optional embodiment of the technical solution in this application, the second permanent magnet is offset from the center of the ball.

[0009] As an optional solution to the technical solution of this application, at least two adjustment slots are provided, and the magnetic poles of the first permanent magnets at the ends of two adjacent adjustment slots are different.

[0010] As an optional solution to the technical solution in this application, the outer surface of the ball is provided with a plurality of oil storage grooves, and the volume of all the oil storage grooves accounts for 3-5% of the volume of the ball.

[0011] As an optional solution to the technical solution of this application, the first ring is located inside the second ring.

[0012] As an optional solution to the technical solution of this application, an oil injection nozzle is provided on the first ring or the second ring, and the oil injection nozzle is connected to the annular mounting groove.

[0013] As an optional solution to the technical solution in this application, the coil is provided in multiple forms.

[0014] 3. Beneficial effects Compared with the prior art, the beneficial effects of the present invention are: 1) By setting a first permanent magnet and a coil, this application enables the first coil and the second coil to generate driving force, which can directly drive the external structure. While ensuring the movement accuracy of the equipment, it also reduces the space utilization rate, which is conducive to the miniaturization of medical equipment.

[0015] 2) This application sets an adjustment groove on the first ring body and sets a second permanent magnet inside the ball, so that when the ball moves to the adjustment groove, it can rotate under the action of the magnetic field generated by the first permanent magnet, which plays a role in pumping lubricating oil and changing the contact area between the ball and the first ring body, thereby increasing the heat dissipation effect of the ball and reducing the wear of the ball. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a self-driven rotary rolling bearing. Figure 2 This is a schematic diagram of the longitudinal section structure of a self-driving rotary rolling bearing; Figure 3 This is a schematic diagram of the cross-sectional structure of a self-driving rotary rolling bearing; In the diagram: 1. First coil; 101. Adjustment groove; 2. Second coil; 3. First permanent magnet; 4. Coil; 5. Annular mounting groove; 6. Cage; 7. Ball bearing; 8. Oil nozzle. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0018] Please see Figures 1 to 3 The present invention provides a self-driven turntable rolling bearing, including a first ring body 1 and a second ring body 2, which are rotatably connected. A plurality of first permanent magnets 3 are fixedly installed in an annular shape at equal intervals on the end face of the first ring body 1, and the magnetic poles of two adjacent first permanent magnets 3 are opposite. A coil 4 is fixedly installed on the second ring body 2, and the coil 4 extends above the first permanent magnets 3. The coil 4 and the first permanent magnets 3 are in clearance fit. An annular mounting groove 5 is provided between the first ring body 1 and the second ring body 2. A retainer 6 is provided within the annular mounting groove 5, and the retainer 6 has multiple pockets. Multiple balls 7 are rotatably mounted within these pockets. An arc-shaped adjusting groove 101 is provided on the first ring body 1, communicating with the mounting groove 5. When the balls 7 move to the adjusting groove 101, a gap is formed between them and the first ring body 1. Figure 3 As shown.

[0019] In this scheme, charging coil 4 generates a traveling wave magnetic field. This traveling wave magnetic field interacts with the magnetic field generated by the first permanent magnet 3 on the first coil 1, producing a tangential magnetic thrust that drives the second coil 2 to rotate relative to the first coil 1. Furthermore, the ball bearing 7 is made of ferromagnetic material. When driving the second coil 2 to rotate relative to the first coil 1, the ball bearing 7 is in a changing magnetic field. When the ball bearing 7 passes the adjustment groove 101, it will detach from the first coil 1, allowing it to move relative to the cage 6 in the changing magnetic field. This allows the lubricating oil in the annular mounting groove 5 to enter between the ball bearing 7 and the cage 6, and between the ball bearing 7 and the first coil 1, serving to dissipate heat and provide lubrication.

[0020] In a preferred embodiment of this application, the ball bearing 7 is provided with a second permanent magnet, and the adjustment groove 101 spans at least two first permanent magnets 3. When the ball bearing 7 spans the annular mounting groove 5, the magnetic field generated by the first permanent magnet 3 can act on the second permanent magnet, driving the ball bearing 7 to rotate, thereby pumping lubricating oil while changing the contact position between the ball bearing 7 and the first ring body 1, and increasing the service life of the ball bearing 7.

[0021] Preferably, the second permanent magnet is offset from the center of the ball 7 to increase the rotation amplitude of the ball 7 when it moves in the magnetic field generated by the first permanent magnet 3, thereby increasing the pumping efficiency. At least two adjustment grooves 101 are provided, and the magnetic poles of the first permanent magnet 3 at the ends of two adjacent adjustment grooves 101 are different. When the ball 7 passes through different adjustment grooves 101, the contact position between the ball 7 and the first ring body 1 will also be different due to the different magnetic poles of the first permanent magnet 3 at the ends of the adjustment grooves 101. This increases the heat dissipation effect of the ball 7 and further increases the uniformity of wear of the ball 7.

[0022] In a preferred embodiment of this application, the outer surface of the ball bearing 7 is provided with a plurality of oil reservoirs, the volume of which accounts for 3-5% of the volume of the ball bearing 7; this is used to increase the pumping efficiency of the lubricating oil when the ball bearing 7 rotates.

[0023] In a preferred embodiment of this application, the first coil 1 is located inside the second coil 2 and is used to increase the torque generated by the interaction between the coil 4 and the first permanent magnet 3. Preferably, multiple coils 4 are provided, and multiple coils 4 can interact with the first permanent magnet 3 at the same time, thereby increasing the torque generated by the interaction between the coil 4 and the first permanent magnet 3 by multiples.

[0024] In a preferred embodiment of this application, an oil injection nozzle 8 is provided on the first ring body 1 or the second ring body 2. The oil injection nozzle 8 is connected to the annular mounting groove 5. Preferably, the oil injection nozzle 8 is provided on the second ring body 2.

Claims

1. A self-driving rotary disc rolling bearing, characterized in that: It includes a first ring body (1) and a second ring body (2), which are rotatably connected. Multiple first permanent magnets (3) are fixedly installed in a ring at equal intervals on the end face of the first ring body (1). The magnetic poles of two adjacent first permanent magnets (3) are opposite. A coil (4) is fixedly installed on the second ring body (2). The coil (4) extends above the first permanent magnets (3) and the coil (4) is in clearance fit with the first permanent magnets (3). An annular mounting groove (5) is provided between the first ring body (1) and the second ring body (2). A retainer (6) is provided in the annular mounting groove (5). A plurality of pockets are provided on the retainer (6). A plurality of balls (7) are rotatably installed in the pockets. An arc-shaped adjustment groove (101) is provided on the first ring body (1). The adjustment groove (101) is connected to the mounting groove (5). When the balls (7) move to the adjustment groove (101), a gap is formed between them and the first ring body (1).

2. The self-driving rotary rolling bearing according to claim 1, characterized in that: The ball (7) is provided with a second permanent magnet, and the adjustment groove (101) spans at least two first permanent magnets (3).

3. The self-driving rotary rolling bearing according to claim 2, characterized in that: The second permanent magnet is offset from the center of the ball (7).

4. The self-driving rotary rolling bearing according to claim 1, characterized in that: At least two adjustment slots (101) are provided, and the magnetic poles of the first permanent magnet (3) at the ends of two adjacent adjustment slots (101) are different.

5. A self-driving rotary rolling bearing according to claim 2, characterized in that: The outer surface of the ball (7) is provided with multiple oil storage grooves, and the volume of all the oil storage grooves accounts for 3-5% of the volume of the ball (7).

6. A self-driving rotary rolling bearing according to claim 1, characterized in that: The first ring (1) is located inside the second ring (2).

7. A self-driving rotary rolling bearing according to claim 1, characterized in that: An oil injection nozzle (8) is provided on the first ring body (1) or the second ring body (2), and the oil injection nozzle (8) is connected to the annular mounting groove (5).

8. A self-driving rotary rolling bearing according to claim 1, characterized in that: The coil (4) is provided in multiple forms.

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