A linear motor
By arranging magnetic steel on the mover and stator of the linear motor, keeping the mover away from the stator, the problem of reducing gap and friction after the slider wear is solved, extending the slider life and ensuring the stable operation of the mover.
Patent Information
- Application Number
- CN202411951857.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-04
AI Technical Summary
In linear motors, the wear of the slider causes the gap between the mover and the stator to decrease, which may cause friction between each other, reduce service life, and may cause the mover to shake.
By arranging the first and second magnets on the mover and the stator, the mover tends to be away from the stator, reducing friction between the slider and the bearing, and maintaining sufficient clearance after the slider wears, avoiding friction and shaking with each other.
It extends the service life of the slider, avoids mutual friction between the mover and the stator, ensures the stable operation of the mover, and avoids shaking problems.
Smart Images
Figure CN119765698A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of motors, and in particular to a linear motor. Background Art
[0002] The linear motor includes a stator wound with a coil and a mover arranged with a permanent magnet, wherein the stator and the mover are connected by a slide groove and a slider. When the coil of the stator is connected to the current, a traveling wave magnetic field is formed. The permanent magnet in the mover moves relative to the stator under the action of the traveling wave magnetic field. Under the limitation of the slide groove and the slider, the mover is able to move. The movement direction of the mover is controlled by the direction of the current connected to the coil. In the prior art, by assembling bearings in the slide groove, wear of the slide groove can be avoided and the friction of the slider can be reduced, thereby improving the overall service life.
[0003] During the long-term operation of the linear motor, the slider is a consumable part. If the slider is not replaced in time after being worn, the gap between the mover and the stator will be reduced. In severe cases, the mover and the stator may even rub against each other, which makes the coil on the stator easy to wear. In addition, the slider may become loose in the slide groove after being worn, and the mover may shake during operation. Summary of the invention
[0004] In order to solve the above technical problems, the present invention provides a linear motor.
[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: The cam is provided with a plurality of bearings on the bottom and wall of the cam along the moving direction of the mover, and a limiting groove is provided on the bearing sleeve located on the wall of the cam. The mover is provided with a slider that cooperates with the cam. When the slider is assembled to the cam, the bottom of the slider abuts against the bearing located at the bottom of the cam, and the side of the bearing close to the wall of the cam is located in the limiting groove. The two adjacent surfaces of the mover and the stator are respectively provided with a first magnetic steel and a second magnetic steel, and the magnetic poles of the corresponding ends of the first magnetic steel and the second magnetic steel are the same. By utilizing the principle of the same magnetic poles, the mover has a tendency to move away from the stator, thereby reducing the friction between the slider and the bearing, and extending the service life of the slider. At the same time, after the slider is worn on the side close to the bottom of the cam, it can ensure that there is still enough gap between the mover and the stator, and no mutual friction will occur. At the same time, the slider can always be in a direction away from the stator in the limiting groove, thereby avoiding the problem of shaking during the operation of the mover.
[0006] Preferably, the slider is detachably connected to the mover via bolts, so that the slider is easily replaced.
[0007] Preferably, both the mover and the stator are provided with assembly grooves, in which an iron mounting frame is detachably connected, and the first magnet and the second magnet are respectively placed in the mounting frames on the mover and the stator. By utilizing the characteristics of iron magnetism, the magnetic strength of the first magnet and the second magnet is ensured after they are assembled to the mover and the stator.
[0008] Preferably, there are two groups of first magnetic steels and second magnetic steels corresponding to each other, which are arranged near the two slide grooves respectively.
[0009] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes the principle of two magnets arranged on the mover and the stator at the same level to repel each other, so that the mover tends to move away from the stator, thereby reducing the friction between the slider and the bearing. After the slider is worn on the side close to the bottom of the slide groove, it is ensured that there is still enough gap between the mover and the stator, and no mutual friction occurs. At the same time, the slider is always in the direction away from the stator in the limit groove, thereby avoiding the problem of shaking of the mover during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a cross-sectional structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the bearing located on the wall of the slide groove of the present invention.
[0011] Figure symbols: 1. mover, 2. stator, 3. bearing, 31. limit groove, 4. slider, 5. first magnetic steel, 6. second magnetic steel, 7. installation frame. DETAILED DESCRIPTION
[0012] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. Example 1
[0013] like Figure 1A linear motor shown in the figure comprises a mover 1 and a stator 2, two mutually parallel slide grooves are provided on the stator 2 at intervals, a plurality of bearings 3 are evenly arranged on the bottom and wall of the slide groove along the moving direction of the mover 1, and a limiting groove 31 is provided on the bearing 3 sleeve located on the wall of the slide groove, and a slider 4 that cooperates with the slide groove is provided on the mover 1, when the slider 4 is assembled into the slide groove, the bottom of the slider 4 abuts against the bearing 3 located at the bottom of the slide groove, thereby reducing the friction between the slider 4 and the slide groove, and the side of the bearing 3 close to the groove wall is located in the limiting groove 31, so that the slider 4 is stably connected in the slide groove and will not fall off, the two adjacent surfaces of the mover 1 and the stator 2 are respectively arranged with a first magnetic steel 5 and a second magnetic steel 6, and the magnetic poles of the corresponding ends of the first magnetic steel 5 and the second magnetic steel 6 are the same, wherein a coil is wound on the stator 2, and a coil is arranged in the mover 1 There is a permanent magnet. When the coil of the stator 2 is connected to the current, a traveling wave magnetic field is formed around it. The permanent magnet in the mover 1 moves relative to the stator 2 under the action of the traveling wave magnetic field. Under the limit of the slide groove 31 and the slider 4, the mover 1 is able to move. The moving direction of the mover 1 is controlled by the direction of the current connected to the coil. During the specific operation, the principle of the first magnetic steel 5 and the second magnetic steel 6 arranged on the mover 1 and the stator 2 repel each other at the same level is utilized to make the mover 1 have a tendency to move away from the stator 2, thereby reducing the friction between the slider 4 and the bearing 3, and when the slider 3 is worn on the side close to the bottom of the slide groove, the slider 4 is always in the direction away from the stator 2 in the limit groove 31, thereby ensuring that there is always enough gap between the mover 1 and the stator 2, and no mutual friction occurs. At the same time, the shaking problem of the mover 1 is avoided during operation.
[0014] Considering that the slider 4 is a wearing part, the slider 4 is detachably connected to the mover 1 by bolts.
[0015] In order to avoid the problem that the magnetic force will not be weakened after the mover 1 and the stator 2 are assembled on the first magnetic steel 5 and the second magnetic steel 6, an assembly groove 22 is opened on the mover 1 and the stator 2, and an iron mounting frame 7 is detachably connected in the assembly groove 22. The first magnetic steel 5 and the second magnetic steel 6 are respectively placed in the mounting frames 7 on the mover 1 and the stator 2. By utilizing the characteristics of iron magnetism and setting the iron mounting frame 7, the magnetism generated by the first magnetic steel 5 and the second magnetic steel 6 is converged, thereby ensuring the magnetic strength.
[0016] As a preferred solution of the above embodiment, there are two groups of first magnetic steels 5 and second magnetic steels 6 corresponding to each other, which are arranged close to the two chute slots respectively.
[0017] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.
Claims
1. A linear motor, comprising a mover (1) and a stator (2), characterized in that: The stator (2) is provided with two mutually parallel slide grooves at intervals, and a plurality of bearings (3) are evenly arranged on the groove bottom and groove wall of the slide groove along the moving direction of the mover (1), and a limiting groove (31) is provided on the bearing (3) sleeve located on the groove wall of the slide groove. The mover (1) is provided with a slider (4) that cooperates with the slide groove. When the slider (4) is assembled into the slide groove, the bottom of the slider (4) abuts against the bearing (3) located at the groove bottom of the slide groove, and the side of the bearing (3) close to the groove wall is located in the limiting groove (31). The two adjacent surfaces of the mover (1) and the stator (2) are respectively arranged with a first magnetic steel (5) and a second magnetic steel (6), and the magnetic poles of the corresponding ends of the first magnetic steel (5) and the second magnetic steel (6) are the same.
2. The linear motor according to claim 1, characterized in that: The slider (4) is detachably connected to the mover (1) via bolts.
3. The linear motor according to claim 2, characterized in that: The mover (1) and the stator (2) are both provided with assembly grooves, in which an iron mounting frame (7) is detachably connected, and the first magnetic steel (5) and the second magnetic steel (6) are respectively placed in the mounting frames (7) on the mover (1) and the stator (2).
4. The linear motor according to claim 3, characterized in that: There are two groups of first magnetic steels (5) and second magnetic steels (6) corresponding to each other, which are arranged close to the two slide slots respectively.