Embedded linear motor module

Abstract

The utility model relates to the technical field of linear modules, in particular to an embedded linear motor module. The motor comprises a U-shaped shell, a stator is fixed to the bottom of the shell, a rotor is arranged in the shell and connected with a fixing base, a first fixing groove is formed in the inner side face of the shell, a first fixing block is arranged in the first fixing groove, a second fixing groove opposite to the first fixing groove is formed in the side face of the rotor, and a second fixing block is arranged in the second fixing groove. A plurality of balls are arranged on the side face of the first fixing block at intervals and can rotate freely, and grooves matched with the balls are formed in the side face of the second fixing block. Or a plurality of balls are arranged on the side face of the second fixing block at intervals, the balls can rotate freely, and grooves matched with the balls are formed in the side face of the first fixing block. By adopting the structure for fixing the balls, collision of the balls can be prevented, and noise can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of linear module technology, and in particular to an embedded linear motor module. Background Technology

[0002] Linear motors are widely used in industrial production. To reduce vibration, current linear motors are driven by electromagnetic technology, using a changing magnetic field to move a magnet, as seen in application number CN202311537119.8, entitled "A Moving Magnet Linear Motor Module and Elevator Door Operator." This linear motor can move quickly. Due to the rapid movement of the mover, the friction between the mover and the housing is relatively intense. Currently, annular ball grooves are generally used on the mover and the housing. As the mover moves, the balls move and roll; this rolling reduces the coefficient of friction and wear. However, during the rolling process, the balls collide with each other, which is particularly intense during rapid movement, generating significant noise and causing noise pollution to the production environment. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an embedded linear motor module that can effectively reduce ball collision noise and improve the comfort of the production environment.

[0004] An embedded linear motor module includes a U-shaped housing, a stator fixed to the bottom of the housing, a mover inside the housing connected to a fixed base, a first fixing groove on the inner side of the housing, a first fixing block inside the first fixing groove, a second fixing groove opposite to the first fixing groove on the side of the mover, a second fixing block inside the second fixing groove, a plurality of balls spaced apart on the side of the first fixing block, the balls being able to rotate freely, and a groove on the side of the second fixing block cooperating with the balls; or, a plurality of balls spaced apart on the side of the second fixing block, the balls being able to rotate freely, and a groove on the side of the first fixing block cooperating with the balls.

[0005] Furthermore, the first fixing block has a plurality of first mounting holes on its side, and the first fixing block is connected to a first limiting plate. The first limiting plate has a through hole that mates with the ball. A part of the ball is located in the first mounting hole, and the other part of the ball extends out of the through hole and enters the groove of the second fixing block. The diameter of the through hole is smaller than the diameter of the ball.

[0006] Furthermore, the side of the first fixing block is provided with a first countersunk hole that cooperates with the first limiting plate, and the first limiting plate is located in the first countersunk hole.

[0007] Furthermore, the second fixing block has multiple second mounting holes on its side, and the second fixing block is connected to a second limiting plate. The second limiting plate has a through hole that mates with the ball. A part of the ball is located in the second mounting hole, and the other part of the ball extends out of the through hole and enters the groove of the first fixing block. The diameter of the through hole is smaller than the diameter of the ball.

[0008] Furthermore, the side of the second fixing block is provided with a second countersunk hole that cooperates with the second limiting plate, and the second limiting plate is located in the second countersunk hole.

[0009] Furthermore, end caps are connected to both sides of the housing, with the middle of the end caps protruding upwards to form a protrusion, and the middle of the fixing seat being recessed to form a concave portion. A cover plate is connected between the two protrusions, with the middle of the cover plate passing through the concave portion.

[0010] Furthermore, the protrusion has a recessed hole in the middle, and the cover plate has a raised ridge in the middle, with both ends of the raised ridge inserted into the recessed hole.

[0011] Furthermore, a grating ruler is provided on the side of the housing, and a connecting block and a reading head are connected to the mounting base.

[0012] The beneficial effects of this utility model are: by adopting a fixed ball structure, this utility model can prevent ball collisions and reduce noise. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one structure in this embodiment.

[0014] Figure 2 This is a schematic diagram of the embodiment with the cover plate removed.

[0015] Figure 3 This is a cross-sectional schematic diagram of this embodiment.

[0016] Figure 4 This is a schematic diagram of the first fixed block engaging with a ball bearing.

[0017] The reference numerals in the figures include:

[0018] 1—End cap; 2—Raster ruler; 3—Connecting block; 4—Reading head; 6—Fixed base; 7—Cover plate; 8—Protruding ridge; 9—Protrusion; 10—Housing; 11—Concave part; 12—Second fixed block; 13—Ball; 14—First fixed block; 16—Concave hole; 17—First limiting plate; 18—Motor; 19—Stator. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Figures 1 to 4 As shown.

[0020] Example: See Figures 1 to 4 An embedded linear motor module includes a U-shaped housing 10, a stator 19 fixed to the bottom of the housing 10, a mover 18 inside the housing 10, and a fixed base 6 connected to the mover 18. The inner side of the housing 10 is provided with a first fixing groove, and a first fixing block 14 is provided in the first fixing groove. The side of the mover 18 is provided with a second fixing groove opposite to the first fixing groove, and a second fixing block 12 is provided in the second fixing groove. A plurality of balls 13 are spaced apart on the side of the first fixing block 14, and the balls 13 can rotate freely. The side of the second fixing block 12 is provided with a groove that cooperates with the balls 13; or, the side of the second fixing block 12 is provided with a plurality of balls 13 spaced apart, and the balls 13 can rotate freely, and the side of the first fixing block 14 is provided with a groove that cooperates with the balls 13.

[0021] This technical solution fixes the position of the ball 13. During the movement of the mover 18, the ball 13 will not move, but will only roll. When the ball 13 is set on the first fixed block 14, the mover 18 drives the second fixed block 12 to move. Rolling friction occurs between the ball 13 and the second fixed block 12. The coefficient of friction is small. At the same time, since the ball 13 is spaced apart, the ball 13 will not expand, thereby effectively reducing the noise of collision and improving the comfort of the production environment.

[0022] In this embodiment, by providing a first fixing groove and a second fixing groove, the first fixing block 14 and the second fixing block 12 can be disassembled when necessary. For example, if the first fixing block 14 or the second fixing block 12 is severely worn after prolonged use, it can be replaced. The replacement cost is low. Alternatively, if the ball bearing 13 is severely worn, the first fixing block 14 or the second fixing block 12 can also be disassembled, and the ball bearing 13 can be replaced. The first fixing block 14 or the second fixing block 12 can be connected with the first fixing groove or the second fixing groove by interference fit or fit; installation or disassembly can be performed by thermal expansion and contraction.

[0023] It should also be noted that stator 19 and mover 18 are existing technologies. Stator 19 is mainly an electromagnetic winding, and mover 18 is a magnet. By changing the magnetic field of stator 19, mover 18 is driven to move rapidly in a straight line. The fixed block is used for connection with other objects.

[0024] See Figure 3 The first fixing block 14 has multiple first mounting holes on its side (not shown in the figure). The first fixing block 14 is connected to a first limiting plate 17. The first limiting plate 17 has a through hole that cooperates with the ball 13. A part of the ball 13 is located in the first mounting hole, and the other part of the ball 13 extends out of the through hole and enters the groove of the second fixing block 12. The diameter of the through hole is smaller than the diameter of the ball 13.

[0025] To facilitate the installation of the ball bearing 13, a first mounting hole is provided on the side of the first fixing block 14 in this embodiment, which cooperates with the first limiting plate 17 to limit the ball bearing 13 within the first mounting hole. Simultaneously, a portion of the ball bearing 13 extends out of the through hole and enters the groove of the second fixing block 12. When the mover 18 moves relative to the ball bearing 13, the ball bearing 13 in contact with the mover 18 rolls. The first limiting plate 17 can be fixed by ultrasonic welding or by end fixing. The first mounting hole can be spherical or cylindrical.

[0026] See Figure 3 The side of the first fixing block 14 is provided with a first countersunk hole that cooperates with the first limiting plate 17, and the first limiting plate 17 is located in the first countersunk hole.

[0027] By setting countersunk holes, the first limiting plate 17 is embedded inside the first fixing block 14 and will not protrude, thus avoiding friction with the second fixing block 12.

[0028] As another technical solution: the second fixing block 12 has a plurality of second mounting holes on its side, the second fixing block 12 is connected to a second limiting plate, the second limiting plate has a through hole that cooperates with the ball 13, a part of the ball 13 is located in the second mounting hole, and the other part of the ball 13 extends out of the through hole and enters the groove of the first fixing block 14, the diameter of the through hole is smaller than the diameter of the ball 13.

[0029] As another option, the ball bearings 13 are mounted on the second fixing block 12, with a structure similar to that described above. Since the length of the second fixing block 12 is much smaller than that of the first fixing block 14, this technical solution requires fewer ball bearings 13, resulting in a relatively lower cost.

[0030] Furthermore, the side of the second fixing block 12 is provided with a second countersunk hole that cooperates with the second limiting plate, and the second limiting plate is located in the second countersunk hole.

[0031] Similarly, by setting a countersunk hole, the second limiting plate is embedded inside the second fixing block 12 and will not protrude, thus avoiding friction with the first fixing block 14. Preferably, an elastic element for pushing the ball outward is provided in the first or second mounting hole. The elastic element can be a spring or the like. Setting an elastic element can keep the ball pushing outward. Even if the ball is worn, it will remain in contact with the first or second fixing block, extending its service life. However, setting an elastic element is not conducive to the rolling of the ball. More preferably, a partition can be set between the elastic element and the ball, and the ball is pushed by the partition. To maintain low wear, lubricant or the like can be added to the partition.

[0032] See Figure 1 , Figure 2 as well as Figure 4The housing 10 is connected to end caps 1 on both sides. The middle part of the end cap 1 protrudes upward to form a protrusion 9. The middle part of the fixing seat 6 is recessed to form a concave part 11. A cover plate 7 is connected between the two protrusions 9. The middle part of the cover plate 7 passes through the concave part 11.

[0033] End caps 1 are provided at both ends of the housing 10 to limit the movement of the mover 18. At the same time, a cover plate 7 is connected between the two end caps 1 to provide a certain degree of dust prevention and reduce the amount of dust entering the housing 10.

[0034] See Figure 1 , Figure 2 The protrusion 9 has a recessed hole 16 in the middle, and the cover plate 7 has a protruding ridge 8 in the middle, with both ends of the protruding ridge 8 inserted into the recessed hole 16.

[0035] By setting the concave hole 16 and the convex ridge 8, the cover plate 7 can be positioned, making installation convenient.

[0036] See Figure 1 The side of the housing 10 is provided with a grating ruler 2, and the fixing base 6 is connected to a connecting block 3 and a reading head 4.

[0037] By setting up the grating ruler 2 and the reading head 4, the moving distance of the mover 18 can be accurately obtained, thus improving the moving accuracy.

[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An embedded linear motor module, comprising a U-shaped housing, a stator fixed to the bottom of the housing, a mover disposed inside the housing, the mover connected to a fixed base, a first fixing groove provided on the inner side of the housing, a first fixing block disposed in the first fixing groove, and a second fixing groove provided on the side of the mover opposite to the first fixing groove, a second fixing block disposed in the second fixing groove, characterized in that: The first fixing block has multiple balls spaced apart on its side, which can rotate freely, and the second fixing block has grooves on its side that mate with the balls; or, the second fixing block has multiple balls spaced apart on its side, which can rotate freely, and the first fixing block has grooves on its side that mate with the balls.

2. The embedded linear motor module according to claim 1, characterized in that: The first fixing block has multiple first mounting holes on its side. The first fixing block is connected to a first limiting plate. The first limiting plate has a through hole that mates with a ball. A part of the ball is located in the first mounting hole, and the other part of the ball extends out of the through hole and enters the groove of the second fixing block. The diameter of the through hole is smaller than the diameter of the ball.

3. The embedded linear motor module according to claim 2, characterized in that: The side of the first fixing block is provided with a first countersunk hole that cooperates with the first limiting plate, and the first limiting plate is located in the first countersunk hole.

4. The embedded linear motor module according to claim 1, characterized in that: The second fixing block has multiple second mounting holes on its side. The second fixing block is connected to a second limiting plate. The second limiting plate has a through hole that mates with the ball. A part of the ball is located in the second mounting hole, and the other part of the ball extends out of the through hole and enters the groove of the first fixing block. The diameter of the through hole is smaller than the diameter of the ball.

5. The embedded linear motor module according to claim 4, characterized in that: The second fixing block has a second countersunk hole on its side that mates with the second limiting plate, and the second limiting plate is located inside the second countersunk hole.

6. The embedded linear motor module according to claim 1, characterized in that: End caps are connected to both sides of the housing. The middle of the end caps protrudes upward to form a protrusion, and the middle of the fixing seat is recessed to form a concave part. A cover plate is connected between the two protrusions, and the middle of the cover plate passes through the concave part.

7. The embedded linear motor module according to claim 6, characterized in that: The protrusion has a recessed hole in the middle, and the cover plate has a raised ridge in the middle, with both ends of the raised ridge inserted into the recessed hole.

8. The embedded linear motor module according to claim 1, characterized in that: The side of the housing is equipped with a grating ruler, and the mounting base is connected to a connecting block and a reading head.

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