A sealed linear motor slide

Abstract

The present invention discloses a sealed linear motor slide, which is composed of a sealed cavity composed of a slide rail, a steel belt, etc. The secondary design of the linear motor of the slide is modular, and a plurality of modular linear motor secondary screws are fixedly mounted on the bottom of the sealed cavity. There are an upper slide and a lower slide, and a slide raceway corresponding to the slide raceway. A plurality of steel balls are arranged between the slide raceway and the slide raceway for rolling, and they together provide rolling guide support for the slide. The upper slide is also designed with a breathing hole to improve the heat exchange efficiency between the linear motor in the sealed cavity and the external environment of the slide. The main structure of the lower slide is the primary part of the linear motor, and the lower slide is relatively independent of the upper slide. The lower slide is modular in design, and the number of windings of the lower slide can be changed to provide a fixed driving force to meet the different working conditions of the linear motor slide. Different lower slides can be shared with the same upper slide, so that only one upper slide with an optimal design length is needed to meet the different thrust requirements of the slide.

Description

Technical Field

[0001] The invention relates to the technical field of sealed linear motor slides, in particular to a sealed linear motor slide. Background Art

[0002] Linear motor slides are increasingly being used in various automation equipment and production lines due to their compact structure, fast speed and high precision.

[0003] The general linear motor slide is open, and the secondary stator of the linear motor is directly exposed at the bottom of the slide rail. This design is simple in structure, easy to manufacture, and conducive to the heat dissipation of the linear motor. However, this open linear motor is prone to adsorb particles of magnetic materials. If these particles fall and accumulate on the raceway, they will affect the normal operation of the ball in the raceway, causing abnormal damage to the raceway and the ball. In addition, the permanent magnet in the stator has a strong magnetic force, which can easily generate a strong suction force on tools and instruments during the use and maintenance of the equipment, thereby causing damage to personnel or equipment.

[0004] The slide of a general sealed linear motor slide is made of glue and is completely integrated with the primary of the linear motor. The length of the slide body, slide raceway, and slide return hole is the same as the length of the primary of the linear motor. When the linear motor slide needs a greater thrust, the primary of the motor is almost doubled, and the corresponding slide raceway and slide return hole must also be lengthened. Since the slide return hole is a slender hole and the processing accuracy of the return hole is high, the longer the slide, the more difficult it is to process the return hole, and the higher the processing cost; when the length of this type of slide reaches the processing limit of the return hole, the slide can no longer be lengthened, which limits the further improvement of the thrust of this type of linear motor slide.

[0005] The existing sealed linear motor slides are designed to move the primary of the linear motor with the slide. The configuration of conventional cooling pipes and other devices on the primary will make the entire linear motor slide structure extremely complicated, and the daily management and maintenance work will increase accordingly. Therefore, the conventional practice is to increase the contact area between the primary and the slide as much as possible, so that the heat generated by the primary coil can be exchanged with the environment through the outer surface of the slide, which plays a cooling role. Therefore, the external components of this type of slide will cover the entire primary. As the length of the primary increases, the total length of the slide increases, and the length of the return bead hole in the slide also increases accordingly, which increases the manufacturing cost of this type of product and limits the thrust value that can be provided. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a sealed linear motor slide. The unique channel structure on the upper slide seat enables the air in the sealed cavity to exchange heat with the external environment more efficiently when the slide seat moves left and right, so as to reduce the operating temperature rise of the linear motor; the innovative raceway arrangement and lower slide seat design allow the primary of the slide linear motor to have a longer layout space, so that the slide can provide a wider thrust range.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a sealed linear motor slide, comprising a slide rail and at least one slide seat, the slide rail comprising a slide rail body, the slide rail body is provided with a through U-shaped groove, the inner upper end of the U-shaped groove is provided with a symmetrically arranged slide rail raceway, the bottom of the U-shaped groove is provided with at least one modular secondary, the slide rail raceway runs through the entire slide rail body, both ends of the slide rail 1 are provided with end plates, a sealing steel belt is provided above the slide rail, magnetic strip mounting grooves are symmetrically provided on both sides above the slide rail body, sealing magnetic strips are embedded in the magnetic strip mounting grooves, both sides of the sealing steel belt are adsorbed on the slide rail body by the magnetic force of the sealing magnetic strip, the sealing steel belt has a convex portion above the slide rail body, and the slide seat portion is located between the convex portion and the slide rail body;

[0008] The slide seat comprises an upper slide seat and a lower slide seat, the upper slide seat is provided with a longitudinal groove, the bottom of the longitudinal groove is an arched bottom, the upper surface of the arched bottom is affixed with a friction-reducing sticker, the friction-reducing sticker is in contact with the sealing steel belt and the convex portion, the arched bottom is provided with a channel 1 and a channel 2, one end of the channel 1 and the channel 2 is provided with a port 1 and a port 2 and respectively leads to the two ends of the upper slide seat located in the U-shaped groove and is connected to the air in the U-shaped groove, the other end of the channel 1 and the channel 2 is provided with a port 3 and a port 4 and respectively leads to the two sides of the upper part of the slide rail body of the upper slide seat and is connected to the air outside the linear motor slide table;

[0009] The upper slide seat is provided with slide seat raceways on both sides of the part located in the U-shaped groove, the slide seat raceways are opposite to the slide rail raceways and the number is the same, at least one steel ball is provided between the slide seat raceways and the slide rail raceways, the upper slide seat is provided with the same number of return ball holes arranged inside and opposite to the slide seat raceways on both sides, the two ends of the upper slide seat are fixed with reversers by screws, and the steel balls on both sides respectively make infinite circulation motion in the channels composed of the slide seat raceways, reversers and return ball holes on the same side;

[0010] A bottom mounting position is provided at the bottom of the upper slide seat, the upper slide seat is located above the bottom mounting position as a whole, at least one connecting hole is provided on the bottom mounting position, a primary of a linear motor is provided inside the lower slide seat, a threaded hole opposite to the connecting hole is provided at the top of the lower slide seat, and a fastening screw is connected to the upper slide seat and the lower slide seat as a whole through the connecting hole and the threaded hole;

[0011] Preferably, the end plate is connected to the slide rail body as a whole by screws.

[0012] Preferably, both ends of the sealing steel belt are fixed to the end plates by screws, and the length of the sealing steel belt is slightly longer than the slide rail body.

[0013] Preferably, the primary of the linear motor is composed of a linear motor core and a plurality of windings.

[0014] Preferably, the modular secondary and the bottom of the U-shaped groove are fixedly connected by screws.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. The sealed linear motor slide is designed with an upper slide and a lower slide. The length of the upper slide is designed according to the optimal processing technology, which is convenient for standardization of production and manufacturing, and reduces the processing difficulty and manufacturing cost; the lower slide is designed to have different lengths according to different thrust requirements, and is designed with different numbers of linear motor windings; the same specification of linear motor slide can be equipped with a variety of lower slides with different thrust capabilities. When in use, the same specification of linear motor slide can be equipped with different lower slides; in addition, when the same linear motor slide is equipped with 2 or more slides, each slide can also be equipped with a different lower slide to economically meet different thrust requirements.

[0016] 2. Air inlet and outlet holes are designed on the upper slide to improve the heat exchange efficiency between the linear motor in the sealed cavity and the external environment of the slide.

[0017] 3. Move the support and guide rollers of the slide upward, and perform simulation and actual testing on the slide rails after the rollers move upward accordingly, and optimize the cross-section design of the slide rails so that the product still has sufficient rigidity under the required external dimensions and load. After the rollers move upward, the lateral space of the lower slide seat is increased, so that the primary winding and the core of the linear motor are larger, and the corresponding electrical parameters of the motor are optimized, and finally the thrust of the slide is increased under the same length of the slide seat. At the same time, after the rollers move upward, there is no interference between the reverser and other components at both ends of the upper slide seat and the two ends of the lower slide seat, and the two ends of the lower slide seat can freely extend out of the two ends of the upper slide seat, so that the length of the lower slide seat is no longer restricted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a sealed linear motor slide of the present invention.

[0019] Figure 2 It is an exploded view of a sealed linear motor slide of the present invention.

[0020] Figure 3 It is an exploded view of a slide rail of a sealed linear motor slide table of the present invention.

[0021] Figure 4It is an exploded view of a slide seat of a sealed linear motor slide table of the present invention.

[0022] Figure 5 It is an exploded view of an upper slide seat of a sealed linear motor slide table of the present invention.

[0023] Figure 6 It is an exploded view of the lower slide seat of a sealed linear motor slide of the present invention.

[0024] Figure 7 It is a schematic diagram of a sealed cavity of a sealed linear motor slide of the present invention.

[0025] Figure 8 The cross section of a sealed linear motor slide of the present invention is Figure 1 .

[0026] Fig. 9 The cross section of a sealed linear motor slide of the present invention is Figure 2 .

[0027] Fig.10 The invention discloses a ventilation channel for a sealed linear motor slide. Figure 1 .

[0028] Fig.11 The invention discloses a ventilation channel for a sealed linear motor slide. Figure 2 .

[0029] Fig.12 It is a cross-sectional view of a long and short double-slide slide of a sealed linear motor slide of the present invention.

[0030] As shown in the figure: 1. Slide rail; 11. Slide rail body; 111. U-shaped groove; 112. Magnetic strip installation groove; 12. Slide rail raceway; 13. End plate; 14. Sealing steel belt; 141. Protrusion; 2. Slide seat; 3. Upper slide seat; 31. Longitudinal groove; 32. Arched bottom; 33. Friction-reducing sticker; 34a. Channel one; 341a. Port one; 342a. Port three; 34b. Channel two; 341b. Port two; 342b. Port four; 35. Slide seat raceway; 36. Return ball hole; 37. Reverser; 38. Bottom mounting position; 39. Connecting hole; 4. Lower slide seat; 41. Threaded hole; 5. Steel ball; 6. Fastening screw; 7. Linear motor primary; 8. Modular secondary; 9. Screw. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0032] A sealed linear motor slide consists of a slide rail 1 and a slide seat 2. The slide seat 2 is divided into an upper slide seat 3 and a lower slide seat 4. The slide seat 2 is driven by the electromagnetic force between the linear motor module secondary 8 and the linear motor primary 7 to reciprocate on the slide rail 1. The linear motor primary 7 and the lower slide seat 4 are integrated into one body. A plurality of linear motor module secondaries 8 are fastened and installed at the bottom of a U-shaped groove 111 by a plurality of screws 9.

[0033] The slide rail 1 of the sealed linear motor slide table has a slide rail body 11, and the slide rail body 11 has a U-shaped cross-section. There is a U-shaped groove 111 penetrating the middle of the slide rail body 11, and slide rail raceways 12 are symmetrically arranged on both sides of the U-shaped groove 111, and the slide rail raceways 12 penetrate the entire slide rail body 11; end plates 13 are designed at both ends of the slide rail 1, and the end plates 13 at both ends are connected to the slide rail body 11 as a whole through screws; a sealing steel belt 14 is designed above the slide rail 1, and magnetic strip installation grooves 112 are symmetrically designed on both sides above the slide rail body 11, and the sealing magnetic strip 15 is embedded in the magnetic strip installation groove 112, and the sealing steel belt 14 and the sealing magnetic strip 15 both penetrate the entire slide rail body 11, and the two ends of the sealing steel belt 14 are fixed above the end plate 13, and the two sides of the sealing steel belt 14 are adsorbed on the slide rail body 11 by the magnetic force of the sealing magnetic strip 15.

[0034] The slide rail body 11, the end plates 13 at both ends and the sealing steel belt 14 together enclose the U-shaped groove 111 to form a sealed cavity. The slide rail raceway 12 belonging to the slide rail 1, the slide raceway 35, the ball return hole 36, the reverser 37 belonging to the upper slide seat 3, the lower slide seat 4, the steel ball 5 and several linear motor modular secondary stages 8 are all located in the sealed U-shaped groove 111. This design can effectively prevent the adhesion and accumulation of foreign matter such as external dust, and effectively protect the slide rail raceway 12, the slide raceway 35 and the steel ball 5; at the same time, the strong magnetic force of the linear motor secondary stage 8 is not easy to directly adsorb external magnetic materials over a short distance, and is not easy to cause excessive personal injury to people holding magnetic objects, and will not cause damage to the slide table due to the adsorption of larger objects between the secondary stage 8 and the primary stage 7.

[0035] The length of the sealing steel belt 14 is slightly longer than the slide rail body 11. The sealing steel belt 14 has a convex portion 141 above the slide rail body 11, and the slide seat 2 is partially located between the convex portion 141 and the slide rail body 11. The slide seat 2 will also drive the convex portion 141 to move accordingly during the movement process.

[0036] The upper slide 3 is designed with slide raceways 35 on both sides of the part located in the U-shaped groove 111. The slide raceways 35 are opposite to the slide rail raceways 12 and the number is equal. A number of steel balls 5 are distributed between the slide raceways 35 and the slide rail raceways 12. The upper slide 3 has the same number of return ball holes 36 arranged inside and opposite to the slide raceways 35 on both sides. The upper slide 3 is fixed with a reverser 37 by screws at both ends. The steel balls 5 on both sides respectively make infinite circulation motion in the channel composed of the slide raceway 35, the reverser 37 and the return ball hole 36 on the same side. The part of the steel ball 5 located between the slide rail raceway 12 and the slide raceway 35 actually bears the external load, and the steel ball 5 in the return ball hole 36 is in an unloaded state.

[0037] The bottom of the upper slide 3 is a bottom mounting position 38 , and the upper slide 3 as a whole is located above the bottom mounting position 38 ; the bottom mounting position 38 is designed with a plurality of connection holes 39 .

[0038] The lower slide 4 is internally integrated with a linear motor core and a linear motor primary 7 composed of a plurality of windings. The top of the lower slide 4 is designed with a plurality of threaded holes 41, which are opposite to the connecting holes 39. A plurality of fastening screws 6 connect the upper slide 3 and the lower slide 4 as a whole through the connecting holes 39 and the threaded holes 41.

[0039] There is no interference between the lower slide 4 and the upper slide 3 at both ends, that is, the two ends of the lower slide 4 can exceed the upper slide 3. Therefore, the number of windings of the primary linear motor 7 integrated inside the lower slide 4 can be changed according to the thrust requirement of the slide. After the number of windings of the primary linear motor 7 changes, the length of the lower slide 4 will change, but the length of the upper slide 3 does not need to be changed. The optimal total length of the upper slide 3 can be designed according to the processing requirements of the return ball hole 36 and combined with an economical processing plan, and it can be standardized; thereby, the sealed linear motor slide can economically provide greater thrust.

[0040] When the same linear motor slide is equipped with two or more slides 2, each slide 2 can also be equipped with a different lower slide seat 4 to economically meet different thrust usage requirements.

[0041] The upper slide seat 3 is designed with a longitudinal groove 31 . The bottom of the groove 31 is an arched bottom 32 . A friction-reducing sticker 33 is attached to the upper surface of the arched bottom 32 . The friction-reducing sticker 33 contacts the convex portion 141 of the sealing steel belt 14 . A channel 1 34a and a channel 2 34b are provided on the arch bottom 32, and one end of the channel 1 34a and the channel 2 34b is provided with a port 1 341a and a port 2 341b, which respectively lead to the two ends of the upper slide 3 located in the U-shaped groove 111 and are connected to the air in the U-shaped groove 111, and the other end of the channel 1 34a and the channel 2 34b is provided with a port 3 342a and a port 4 342b, which respectively lead to the two sides of the upper part of the upper slide 3 located in the slide rail body 11 and are connected to the air outside the linear motor slide. Since most of the structure of the slide 2 is located in the sealed U-shaped groove 111, when the slide 2 reciprocates rapidly under the action of the linear motor, the slide 2 is equivalent to a piston, and a pressure difference will appear between the two ends of the slide 2 in the sealed U-shaped groove 111 and the air of the external environment, and the faster the speed of the slide 2, the greater the pressure difference will be. By utilizing the aforementioned effect, when the slide 2 moves rapidly toward one end, the air in the U-shaped groove 111 in front of the slide 2 enters the first channel of 34a through 341a, and is discharged to the external environment of the slide through 342a; at the same time, the air in the external environment enters the second channel of 34b from 342b, and enters the U-shaped groove 111 behind the slide 2 through 341b. After the slide has been running for a period of time, the temperature of the air inside the slide is higher than the temperature of the air outside the slide due to the heat loss of the linear motor. Therefore, the air exchange inside and outside the slide is accompanied by heat exchange between the inside of the slide and the external environment, that is, hot air is discharged and cold air is inhaled. This reduces the operating temperature of the linear motor inside the slide and slows down the temperature rise, which is beneficial to the stability of the performance of the linear motor and the extension of its service life.

[0042] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A sealed linear motor slide, characterized in that: The invention comprises a slide rail (1) and at least one slide seat (2), wherein the slide rail (1) comprises a slide rail body (11), wherein the slide rail body (11) is provided with a through U-shaped groove (111), wherein the inner upper end of the U-shaped groove (111) is provided with a symmetrically arranged slide rail roller (12), wherein at least one modular secondary (8) is provided at the bottom of the U-shaped groove (111), wherein the slide rail roller (12) runs through the entire slide rail body (11), wherein end plates (13) are provided at both ends of the slide rail (1), and wherein the slide rail (1) A sealing steel belt (14) is provided on the top, and magnetic strip installation grooves (112) are symmetrically provided on both sides of the top of the slide rail body (11), and a sealing magnetic strip (15) is embedded in the magnetic strip installation groove (112). Both sides of the sealing steel belt (14) are adsorbed on the slide rail body (11) by the magnetic force of the sealing magnetic strip (15), and the sealing steel belt (14) has a convex portion (141) on the top of the slide rail body (11), and the slide seat (2) is partially located between the convex portion (141) and the slide rail body (11); The slide seat (2) comprises an upper slide seat (3) and a lower slide seat (4), the upper slide seat (3) is provided with a longitudinal groove (31), the bottom of the longitudinal groove (31) is an arched bottom (32), the upper surface of the arched bottom (32) is affixed with a friction-reducing sticker (33), the friction-reducing sticker (33) is in contact with the sealing steel belt (14) and the convex portion (141), the arched bottom (32) is provided with a channel 1 (34a) and a channel 2 (34b), the channel 1 (34a) and the channel 2 One end of the channel (34b) is provided with a port 1 (341a) and a port 2 (341b) and respectively leads to the two ends of the upper slide seat (3) located in the U-shaped groove (111) and communicates with the air in the U-shaped groove (111); the other ends of the channel 1 (34a) and the channel 2 (34b) are provided with a port 3 (342a) and a port 4 (342b) and respectively lead to the two sides of the upper part of the upper slide seat (3) located in the slide rail body (11) and communicate with the air outside the linear motor slide table; The upper slide seat (3) is provided with slide seat raceways (35) on both sides of the inner part of the U-shaped groove (111), the slide seat raceways (35) are opposite to the slide rail raceways (12) and are the same in number, and at least one steel ball (5) is provided between the slide seat raceway (35) and the slide rail raceway (12), and the same number of return ball holes (36) are arranged inside the upper slide seat (3) and opposite to the slide seat raceways (35) on both sides, and the two ends of the upper slide seat (3) are fixed with deflectors (37) by screws, and the steel balls (5) on both sides respectively make infinite circulation motion in the channels composed of the slide seat raceway (35), the deflector (37) and the return ball holes (36) on the same side; A bottom mounting position (38) is provided at the bottom of the upper slide (3), the upper slide (3) is located above the bottom mounting position (38) as a whole, and at least one connecting hole (39) is provided on the bottom mounting position (38), a primary linear motor (7) is provided inside the lower slide (4), and a threaded hole (41) opposite to the connecting hole (39) is provided at the top of the lower slide (4), and a fastening screw (6) connects the upper slide (3) and the lower slide (4) into one body through the connecting hole (39) and the threaded hole (41); The end plate (13) is connected to the slide rail body (11) as a whole by means of screws; Both ends of the sealing steel belt (14) are fixed to the end plate (13) by means of screws, and the length of the sealing steel belt (14) is slightly longer than the slide rail body (11).

2. A sealed linear motor slide according to claim 1, characterized in that: The linear motor primary (7) is composed of a linear motor iron core and a plurality of windings.

3. The sealed linear motor slide according to claim 1, characterized in that: The modular secondary (8) and the bottom of the U-shaped groove (111) are fixedly connected by screws (9).

Images