A linear motor with high dust protection

Abstract

The present invention discloses a linear motor with high dust protection, specifically relating to the technical field of linear motors, including a motor housing and a movable seat, wherein areas corresponding to the edges of the steel belt on both sides of the top of the motor housing are provided with steel belt extrusion assemblies, and an extrusion unlocking assembly is provided on the movable seat, wherein the steel belt extrusion assembly includes an extrusion resistance-increasing strip embedded in the top wall of the motor housing, and an extrusion elastic member is provided on the side of the extrusion resistance-increasing strip facing away from the steel belt; and the extrusion unlocking assembly includes a shifting guide bar, and the shifting guide bar is fixedly mounted on the movable seat. The present invention provides a vertical friction force to the steel belt by tightly contacting the edge of the steel belt with the extrusion resistance-increasing strip, thereby strengthening the contact strength of the steel belt on the motor housing, making the steel belt relatively stable and not prone to generating gaps with the motor housing, thereby improving the stability of the linear motor, enhancing the dustproof effect of the linear motor, and improving the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors. More specifically, the present invention relates to a linear motor with high dust and protection. Background Art

[0002] The main structure of a linear motor consists of a stator and a mover. The stator can be composed of windings or permanent magnets. The windings can generate a magnetic field by passing an electric current, and the permanent magnets can provide a constant magnetic field without an external current. When an electric current passes through the windings of the stator or the coils of the mover, the electromagnetic force causes the mover to generate a driving force in the magnetic field generated by the stator. This force causes the mover to move in a straight line direction, forming a linear drive.

[0003] Among them, the stator and the guide rail of the linear motor are both installed in the motor housing, and the mover is slidably engaged with the guide rail in the motor housing. The top of the sliding seat connected to the stator extends out of the motor housing to install corresponding usage components. Since the mover and the sliding seat need to reciprocate along the length direction of the motor housing, the top of the motor housing itself has an open structure to avoid hindering the movement of the mover. For some usage scenarios, the usage environment has high dust or a lot of debris and other sundries. To prevent dust and sundries from entering the interior of the motor housing and affecting the guide rail structure and coils and other structures in the linear motor, it is necessary to effectively protect the top opening area of the linear motor.

[0004] In the prior art, the linear motor is mainly protected by using a steel belt seal and a bellows seal. Compared with the bellows seal structure, the steel belt seal structure is more compact, has a relatively smaller overall volume, stronger durability, and better protection performance. Especially, it can effectively protect against liquids. Therefore, in some processing scenarios, the linear motor with a steel belt seal structure is more widely used.

[0005] Among them, the steel belt sealing structure is mainly made of thin stainless steel or galvanized steel sheets. The width of the steel belt is adapted to the top opening area of the linear motor housing, covering the opening area. At the same time, both ends of the steel belt are connected to both ends of the linear motor. In addition, a through slot structure is provided at the position where the moving seat extends out of the motor housing. The through slot structure is higher than the top of the motor housing to ensure that the moving seat has sufficient structure to support the equipment in use. The steel belt passes through the through slot structure to form a raised part in the moving seat. The bottom of the raised part and the area at the top of the motor housing can enable the moving seat to form a support structure extending outward. At the same time, there are pressing roller structures at the front and rear ends of the moving seat to press the steel belt downward, ensuring that both ends of the raised part can be fully attached to the motor housing to form a seal. Since the steel belt has a certain deformability, when the moving seat moves, the steel belt can generate adaptive deformation and will not hinder the movement of the moving seat. At the same time, although the raised part of the steel belt in the moving seat leaves the motor housing, the moving seat itself still forms a seal with the motor housing. In the rest of the part, the steel belt structure is attached to the motor housing to form a seal, so an effective dust-proof effect can be formed.

[0006] Among them, due to the effective sealing of the steel belt, the linear motor housing is effectively protected. However, for some linear motors, in order to adapt to the use space, their own structure is relatively compact, and there is not much free space inside the motor housing. The presence of the mover divides the internal space of the motor housing into two spaces. When the stator moves, it is difficult for the air on both sides to circulate in time, which will affect the air in the corresponding space. For example, when the mover moves forward, it will compress the air in the front space. On the contrary, the air pressure in the rear is relatively reduced. For the use environment with a small stroke and a relatively low moving speed, the above-mentioned air compression effect is not large and will not affect the use of the linear motor. However, for the use scenarios with a large stroke and a relatively fast required moving speed, the compression effect of the mover on the front space is relatively large. Seriously, it will push open the steel belt structure in the front, forming a gap between the edge of the steel belt structure and the motor housing, resulting in air leakage. Especially when the mover moves rapidly in the reverse direction, the air pressure in the originally compressed area will decrease again, forming a suction state from the outside to the inside before the steel belt gap is completely closed. Then, when there is a lot of accumulation of external dust and other sundries after the long-term use of such linear motors, in the above situation, it will cause some dust or even liquid to enter, thus reducing the protection effect on the linear motor and affecting the normal use of the linear motor. Summary of the Invention

[0007] The present invention provides a linear motor with high dust protection, and the problem to be solved is: if the existing linear motor has a large moving stroke and a fast moving speed of the rotor, the compression effect on the front space is relatively large. In severe cases, the steel belt structure in the front will be pushed open, forming a gap between the edge of the steel belt structure and the motor housing, reducing the protection effect of the linear motor and affecting the normal use of the linear motor.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a linear motor with high dust protection, comprising a motor housing and a movable base, the movable base being slidably disposed on the motor housing, a steel belt being further disposed on the top of the motor housing, an extension structure being disposed in an area where the movable base extends beyond the top surface of the motor housing, a steel belt through-groove being disposed in an area of the top of the movable base corresponding to the extension structure, and the steel belt passing through the steel belt through-groove;

[0009] The areas corresponding to the edges of the steel belt on both sides of the top of the motor housing are provided with steel belt squeezing components, and the movable seat is provided with a squeezing unlocking component. The steel belt squeezing component includes an squeezing resistance increasing strip, which is embedded in the top wall of the motor housing and cooperates with the edge of the steel belt. An squeezing elastic member is provided on the side of the squeezing resistance increasing strip facing away from the steel belt.

[0010] The extrusion unlocking assembly includes a shift guide bar, which is fixedly mounted on a movable seat. The extrusion resistance increasing bar is provided with a shift guide groove for slidingly cooperating with the shift guide bar, and the distance from the shift guide bar away from the edge of the steel belt to the edge of the steel belt is greater than the distance from the inner wall of the shift guide groove away from the edge of the steel belt to the edge of the steel belt.

[0011] In a preferred embodiment, a stator is installed inside the motor housing, a mover is fixedly installed at the bottom of the movable seat, guide rollers for guiding the steel belt to bend are provided at both ends of the steel belt penetration groove, and both ends of the shifting guide bar extend out of the end of the movable seat respectively and form a guiding part. Dust shielding components are provided between the front and rear ends of the top extension structure of the movable seat and the steel belt, and the dust shielding component is fixedly installed at the bottom of the top extension structure of the movable seat, and the dust shielding component adopts a brush structure.

[0012] In a preferred embodiment, a lining structure is provided at the position corresponding to the shifting guide groove in the extruded resistance increasing strip, the shifting guide groove is formed in the lining structure, the lining is made of plastic material, and lubricating oil is provided in the shifting guide groove.

[0013] In a preferred embodiment, a second magnetic strip is installed between the side of the shifting guide bar away from the edge of the steel strip and the side of the shifting guide groove away from the edge of the steel strip, and the magnetic poles of the two sets of second magnetic strips that cooperate with each other are opposite.

[0014] In a preferred embodiment, a plurality of independent cavities are provided inside the extruded elastic member along the length direction of the extruded elastic member, and a connecting hole communicating with the inner cavity of the motor housing is provided at the bottom of the independent cavity.

[0015] In a preferred embodiment, the motor housing is a U-shaped structure, with end covers fixedly installed at both ends of the motor housing, a slide rail assembly installed inside the motor housing, and the movable seat slidingly cooperates with the motor housing through two sets of slide rail assemblies. A fitting portion that fits with the steel belt is provided on the top of the motor housing, and a first magnetic strip is installed in the fitting portion of the motor housing.

[0016] In a preferred embodiment, multiple groups of air guide pipes are provided on the outside of the motor housing, and the two ends of the air guide pipes extend to the two ends of the motor housing respectively and are fixedly connected to the end covers at both ends of the motor housing, and both ends of the air guide pipes pass through the corresponding end covers and are connected to the inner cavity of the motor housing.

[0017] In a preferred embodiment, each group of air guide pipes includes an end connecting pipe and a connecting pipe. Two end connecting pipes are provided, and the two end connecting pipes are fixedly mounted on the two end covers respectively. The two ends of the connecting pipe are respectively connected to the end connecting pipe through a buffering elastic sac, and the end connecting pipe, the connecting pipe and the buffering elastic sac are interconnected.

[0018] In a preferred embodiment, both ends of the buffer elastic sac are fixedly connected to a rotating sleeve, and the two rotating sleeves are rotatably connected to the corresponding parts of the end connecting pipe and the connecting pipe respectively. An impeller is fixedly installed in the rotating sleeve, and multiple groups of heat conducting plates are fixedly installed on the side wall of the rotating sleeve. The heat conducting plates extend into the inner cavity of the rotating sleeve, and the heat conducting plates are a flat heat conducting structure. The position where the heat conducting plates extend out of the rotating sleeve forms a heat dissipation end.

[0019] In a preferred embodiment, the two ends of the steel belt are respectively connected to the end cover through a steel belt fixer, the steel belt fixer is slidably installed on the end cover, and an elastic member is provided between the steel belt fixer and the end cover, which is used to provide elastic force to the steel belt fixer toward the outside of the motor housing.

[0020] The beneficial effects of the present invention are as follows: The present invention provides an elastic force for squeezing the resistance increasing strip towards the steel strip through the squeezing elastic member. Under this elastic force, the squeezing resistance increasing strip is in close contact with the edge of the steel strip, thereby providing a vertical frictional force to the steel strip, strengthening the fitting force of the steel strip on the motor housing, keeping the steel strip relatively stable, and not easily generating a gap between the steel strip and the motor housing. Thus, the use stability of the linear motor is improved, the dustproof effect of the linear motor is enhanced, and the service life is prolonged. As the moving seat continuously moves, the matching area between the shifting guide bar and the shifting guide groove also continuously changes, and the squeezing resistance increasing strip itself can generate adaptive deformation. Therefore, it can cooperate with the continuous movement of the moving seat and ensure the corresponding shifting effect. At the same time, the cooperation between the shifting guide bar and the squeezing resistance increasing strip can not only control the squeezing of the squeezing resistance increasing strip, but also form a corresponding sealing structure, further improving the protection effect on the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the linear motor of the present invention.

[0023] Figure 3 It is a top view of the moving seat of the present invention.

[0024] Figure 4 For the present invention Figure 3 Enlarged view of the structure of part A.

[0025] Figure 5 It is a schematic diagram of the cooperation between the squeezing resistance increasing strip and the steel strip when the shifting guide bar of the present invention does not reach the corresponding shifting guide groove.

[0026] Figure 6 It is a schematic diagram when the shifting guide bar of the present invention reaches the corresponding shifting guide groove and shifts the squeezing resistance increasing strip away from the steel strip.

[0027] Figure 7 It is a schematic diagram of the cooperation between the squeezing resistance increasing strip and the steel strip after the steel strip squeezing assembly of the present invention is improved.

[0028] Figure 8 It is a schematic diagram of the cooperation between the shifting guide bar and the shifting guide groove after the steel strip squeezing assembly of the present invention is improved.

[0029] Figure 9 It is a distribution diagram of the independent cavities in the squeezing elastic member after the present invention is improved.

[0030] Figure 10 It is a schematic diagram of the structure of the linear motor after adding a diversion air pipe in the present invention.

[0031] Figure 11 For the present inventionFigure 10 Enlarged view of part B structure.

[0032] Figure 12 This is a view showing the mating state between the buffer elastic bladder and the diversion air pipe of the present invention.

[0033] Figure 13 This is a schematic structural view of the buffer elastic bladder after improvement according to the present invention.

[0034] Figure 14 This is a transverse cross-sectional view of the buffer elastic bladder after improvement according to the present invention.

[0035] Reference numerals are: 1, motor housing; 11, stator; 12, slide rail assembly; 13, first magnetic strip; 2, moving seat; 21, rotor; 22, steel strip through groove; 23, guide roller; 24, dust-proof assembly; 3, end cover; 4, steel strip; 41, steel strip fixator; 5, steel strip extrusion assembly; 51, extrusion resistance increasing strip; 52, extrusion elastic member; 521, independent cavity; 522, connection hole; 53, shifting guide groove; 6, extrusion unlocking assembly; 61, shifting guide strip; 62, second magnetic strip; 7, diversion air pipe; 71, end connection pipe; 72, connecting pipe; 8, buffer elastic bladder; 81, rotating sleeve; 82, impeller; 83, heat conducting sheet; 84, heat dissipation end. Detailed implementation manners

[0036] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following detailed implementation manners are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0037] Refer to the attached drawings of the specification Figures 1 to 14, A linear motor with high dust-proof protection, comprising a motor housing 1 and a moving seat 2. The moving seat 2 is slidably arranged on the motor housing 1. The motor housing 1 is of a U-shaped structure. End caps 3 are fixedly installed at both ends of the motor housing 1. A stator 11 and a slide rail assembly 12 are installed inside the motor housing 1. A mover 21 is fixedly installed at the bottom of the moving seat 2. Two groups of slide rail assemblies 12 are arranged inside the motor housing 1. The moving seat 2 is slidably matched with the motor housing 1 through the two groups of slide rail assemblies 12. The top of the moving seat 2 extends out of the top surface of the motor housing 1. A steel belt 4 is also arranged on the top of the motor housing 1. Both ends of the steel belt 4 are respectively connected to the end cap 3 through steel belt fixers 41 (wherein, the steel belt fixers 41 are slidably installed on the end cap 3, and an elastic member is arranged between the steel belt fixers 41 and the end cap 3. This elastic member is used to provide an elastic force to the steel belt fixers 41 towards the outside of the motor housing 1, so as to form an elastic stretch of the steel belt 4 by means of the two steel belt fixers 41 to ensure the stability during the use of the linear motor). A fitting portion that fits with the steel belt 4 is arranged on the top of the motor housing 1, and a first magnetic strip 13 (preferably a rubber magnetic strip) is installed in the fitting portion of the motor housing 1. Thus, when the steel belt 4 fits on the motor housing 1, the steel belt 4 can be adsorbed by means of the first magnetic strip 13, and a sealing effect between the steel belt 4 and the motor housing 1 is formed. The top of the moving seat 2 extends out of the top surface of the motor housing 1. An extending structure towards both sides is arranged in the area where the moving seat 2 extends out of the top surface of the motor housing 1. This extending structure corresponds to the top surface of the motor housing 1. A steel belt through groove 22 is arranged in the area of the top of the moving seat 2 corresponding to the extending structure. The steel belt 4 passes through the steel belt through groove 22 and forms a structure protruding from the top surface of the motor housing 1 in the moving seat 2. At the same time, guiding rollers 23 for bending and guiding the steel belt 4 are arranged at both ends of the steel belt through groove 22. Thus, while ensuring that the extending structure at the top of the moving seat 2 can extend out of the motor housing 1, the steel belt 4 can also fully cover the motor housing 1, and then the motor housing 1, the end cap 3 and the steel belt 4 form a relatively closed structure to effectively prevent dust.

[0038] It should be noted that the above structures are all conventional structures of steel belt sealed linear motors. The stator 11, the mover 21, and the penetration cooperation between the steel belt 4 and the steel belt penetration groove 22 are all existing technologies. Therefore, the embodiments will not be explained in detail. In order to avoid the formation of a piston phenomenon in the area inside the motor housing 1 of the moving seat 2 in an environment with a long stroke and a fast moving speed (that is, excessive compression of the front airflow causes the steel belt 4 to bulge and form a gap between the steel belt 4 and the motor housing 1), this embodiment also provides the following technical solutions. The areas corresponding to the edges of the steel belt 4 on both sides of the top of the motor housing 1 are provided with steel belt squeezing components 5. The steel belt squeezing components 5 are used to squeeze the edges of the steel belt 4 to increase the vertical friction force on the edges of the steel belt 4. The moving seat 2 is provided with an extrusion unlocking component 6. The extrusion unlocking component 6 is used to eliminate the extrusion force of the steel belt squeezing component 5 in the area where the moving seat 2 is located, that is, in the area where the moving seat 2 and the extrusion unlocking component 6 are located, the steel belt squeezing component 5 does not squeeze the steel belt 4, so that the steel belt 4 forms a relative motion fit in the guide roller 23.

[0039] For details, please refer to the attached manual. Figures 2 to 6 The steel belt extrusion assembly 5 includes an extrusion resistance increasing strip 51, which is embedded in the top wall of the motor housing 1 and has the ability to generate a relative micro-movement in the motor housing 1. The extrusion resistance increasing strip 51 is preferably a rubber structure, and the extrusion resistance increasing strip 51 is installed in the top wall of the motor housing 1 through a snap-fit structure, and can generate relative sliding between the motor housing 1 and the extrusion resistance increasing strip 51. The extrusion resistance increasing strip 51 cooperates with the edge of the steel belt 4, and an extrusion elastic member 52 is provided on the side of the extrusion resistance increasing strip 51 away from the steel belt 4. The extrusion elastic member 5 2 is used to provide an elastic force for the extrusion resistance increasing strip 51 to squeeze the steel belt 4. Under this elastic force, the extrusion resistance increasing strip 51 is tightly attached to the edge of the steel belt 4, thereby providing a vertical friction force to the steel belt 4, thereby strengthening the fit of the steel belt 4 on the motor housing 1. Therefore, when the moving seat 2 moves, even if the air in front is compressed, causing the air to squeeze the steel belt 4, the steel belt 4 can remain relatively stable and is unlikely to have a gap with the motor housing 1, thereby improving the use stability of the linear motor, enhancing the dustproof effect of the linear motor, and increasing the service life.

[0040] At the same time, the extrusion unlocking component 6 includes a shifting guide bar 61, which is fixedly mounted on the moving seat 2, and a shifting guide groove 53 is provided on the extrusion resistance increasing bar 51 for slidingly cooperating with the shifting guide bar 61. Specifically, the shifting guide bar 61 is located at the bottom of the extended structure on both sides of the top of the moving seat 2, that is, the shifting guide bar 61 is located at the cooperating area between the moving seat 2 and the top wall of the motor housing 1, and the distance from the shifting guide bar 61 away from the edge of the steel belt 4 to the edge of the steel belt 4 is greater than the distance from the inner wall of the shifting guide groove 53 away from the edge of the steel belt 4 to the edge of the steel belt 4. In other words, the straight line trajectory formed by the shifting guide bar 61 deviates more from the steel belt 4 than the straight line trajectory of the shifting guide groove 53, but the above deviation difference does not need to be too large. In actual use, the shifting guide bar 61 and the shifting guide groove 53 are aligned with each other. In the area where the groove 53 cooperates, the shifting guide bar 61 forms an extrusion on the shifting guide groove 53, that is, the shifting guide groove 53 is deviated to the side away from the steel belt 4, so that the extrusion resistance increasing bar 51 does not form extrusion with the edge of the steel belt 4, and in the area where the moving seat 2 has not reached, the shifting guide bar 61 does not cooperate with the shifting guide groove 53 in the corresponding area. Therefore, except for the area near the moving seat 2, the extrusion resistance increasing bar 51 and the steel belt 4 in the remaining areas are in a tight fit to form a corresponding stable resistance to the steel belt 4, and as the moving seat 2 continues to move, the cooperating area between the shifting guide bar 61 and the shifting guide groove 53 is also constantly changing, but the extrusion resistance increasing bar 51 itself can produce adaptive deformation, so it can cooperate with the continuous movement of the moving seat 2 and ensure the corresponding shifting effect.

[0041] It should be noted that the steel belt 4 needs to produce an upward deformation starting from the end area of the steel belt through-groove 22, that is, before this position, the extrusion resistance increasing strip 51 and the extrusion lock of the steel belt 4 need to be unlocked. Therefore, the two ends of the shifting guide strip 61 extend out of the end of the moving seat 2 respectively, and a guiding part is formed. That is to say, in the process of movement of the moving seat 2, the guiding part at the front end of the shifting guide strip 61 cooperates with the extrusion resistance increasing strip 51 in advance to realize the shifting unlocking, ensuring that the steel belt 4 can smoothly produce an upward deformation at the end of the steel belt through-groove 22.

[0042] At the same time, the cooperation between the shifting guide strip 61 and the extrusion resistance increasing strip 51 can not only control the extrusion of the extrusion resistance increasing strip 51, but also form a corresponding sealing structure to form a corresponding seal between the extended structures on both sides of the moving seat 2 and the surface of the motor housing 1 (even if the shifting guide strip 61 and the shifting guide groove 53 are not completely fitted together, a labyrinth sealing structure can be formed to form a certain sealing effect). That is to say, except for the gaps between the front and rear ends of the moving seat 2 and the steel belt 4, the rest of the parts are effectively sealed, and the gaps between the steel belt 4 and the front and rear ends of the moving seat 2 are relatively small, and external dust is not easy to enter. However, in order to enhance the sealing effect, refer to the attached manual. Figure 11, dust-proof components 24 are provided between the front and rear ends of the top extension structure of the moving seat 2 and the steel belt 4. The dust-proof components 24 are fixedly installed at the bottom of the top extension structure of the moving seat 2, that is, the dust-proof components 24 are installed at the areas where the front and rear ends of the steel belt through groove 22 start to cooperate with the steel belt 4. The bottom of the dust-proof component 24 contacts the surface of the steel belt 4. The dust-proof component 24 can adopt a smooth guide bar structure with low friction, such as a graphite bar structure, or a brush structure, to prevent external dust from entering the steel belt through groove 22 and further improve the protection effect on the linear motor.

[0043] In the above embodiment, the shifting guide groove 53 only needs to provide a lateral elastic force to the extrusion resistance increasing strip 51. Therefore, the extrusion elastic member 52 can use a spring structure evenly distributed along the length direction of the extrusion resistance increasing strip 51, or other elastic structures. In this embodiment, in order to reduce costs, an integrated structure of the extrusion resistance increasing strip 51 and the extrusion elastic member 52 is adopted, that is, the two are processed from the same rubber strip, which is convenient for the installation and use of the extrusion resistance increasing strip 51.

[0044] In addition, for a frequently used linear motor, the long-term cooperation between the extrusion resistance increasing strip 51 and the shifting guide groove 53 is likely to cause wear. Therefore, in order to reduce friction, corresponding lubricating oil or grease can be provided in the extrusion resistance increasing strip 51, or a supplementary structure for lubricating oil or grease can be provided on the moving seat 2 to supplement lubrication regularly and reduce friction.

[0045] Among them, the above friction is mainly the extrusion friction between the shifting guide bar 61 and the inner wall of the shifting guide groove 53 when the shifting guide bar 61 shifts the shifting guide groove 53. In order to reduce friction, the present embodiment further improves the steel belt extrusion assembly 5, referring to the attached Figure 7 and Figure 8 , a lining structure is provided in the extrusion resistance increasing strip 51 corresponding to the shifting guide groove 53, and the shifting guide groove 53 is formed in the lining structure. The hardness of the lining structure is greater than that of the extrusion resistance increasing strip 51, and the lining structure still has deformability. For example, the lining structure is made of plastic material. At the same time, second magnetic strips 62 (such as rubber magnetic strips) are respectively installed between the side of the shifting guide bar 61 away from the edge of the steel belt 4 and the side of the shifting guide groove 53 away from the edge of the steel belt 4. The magnetic poles of the two groups of second magnetic strips 62 on the side where they cooperate with each other are opposite. Therefore, when the shifting guide bar 61 cooperates with the shifting guide groove 53, the extrusion of the shifting guide groove 53 can be provided by means of the above magnetic repulsive force, so as to avoid the direct contact between the shifting guide bar 61 and the inner side wall of the shifting guide groove 53, or reduce the contact pressure between the two, thereby reducing the wear of the corresponding materials and improving the service life of the corresponding structure.

[0046] Further, under the scheme based on the integrated structure of the extrusion resistance increasing strip 51 and the extrusion elastic member 52, the present embodiment also provides the following scheme. Specifically, referring to the attachedFigure 8 and Figure 9 Inside the extrusion elastic member 52, multiple groups of independent cavities 521 are arranged along the length direction of the extrusion elastic member 52. A connection hole 522 communicating with the inner cavity of the motor housing 1 is provided at the bottom of the independent cavity 521. That is, while providing an elastic force to the extrusion resistance increasing strip 51 by means of the elasticity of the extrusion elastic member 52 itself, the internal air pressure of the motor housing 1 can also be used for assistance. For example, when the moving seat 2 moves forward, the air in the front area of the moving seat 2 is correspondingly compressed. At this time, since the independent cavity 521 in the corresponding area communicates with the inner cavity of the motor housing 1, this air pressure will act on the independent cavity 521 to increase the supporting force of the extrusion elastic member 52 on the extrusion resistance increasing strip 51, thereby improving the extrusion effect of the extrusion resistance increasing strip 51 on the steel strip 4.

[0047] In addition to adopting the above method of increasing the fixing effect on the steel strip 4 to reduce the influence of the piston effect formed when the moving seat 2 moves, this embodiment also provides another method. This method can be used independently, but in order to enhance the protection effect, this embodiment combines this method with the above method. Specifically, referring to the attached Figure 10 On the outer side of the motor housing 1, multiple groups of diversion air pipes 7 are provided. The two ends of the diversion air pipe 7 respectively extend to the two ends of the motor housing 1 and are fixedly connected to the end covers 3 at the two ends of the motor housing 1. Both ends of the diversion air pipe 7 penetrate through the corresponding end covers 3 and communicate with the inner cavity of the motor housing 1.

[0048] It should be noted that for convenient installation and space saving, corresponding grooves can be provided at the bottom of the motor housing 1 to arrange the diversion air pipes 7 in the grooves. Through the setting of the extrusion unlocking assembly 6, the spaces at both ends of the motor housing 1 (with the moving seat 2 as the boundary) can be communicated from the outside. Then, when the moving seat 2 moves, the air in the front is compressed and can move backward through the steel strip 4, thereby reducing the problem that the air is severely compressed due to the too fast moving speed of the moving seat 2. At the same time, although the diversion air pipes 7 are arranged outside the motor housing 1, they are not communicated with the outside air. Therefore, the independence of the air inside the motor housing 1 can still be ensured. At the same time, the diversion air pipes 7 can be made of metal heat-conducting materials, such as copper pipes. While forming the above air flow, since the diversion air pipes 7 are in contact with the external environment, the air flowing through the diversion air pipes 7 can exchange heat, so that when the heat inside the motor housing 1 increases due to long-term use, the air inside the motor housing 1 can be quickly dissipated, improving the protection effect on the internal components of the motor housing 1 and enhancing the service life of the linear motor.

[0049] Furthermore, although the above-described diversion air duct 7 can effectively guide air, in some usage scenarios, the moving speed of the moving seat 2 is too fast, the one-way moving stroke is too long, the overall length of the linear motor is too long, and the length spanned by the diversion air duct 7 is also relatively large. The air compensation effect of the air flowing through the diversion air duct 7 is relatively poor. As a result, the guiding effect of the diversion air duct 7 cannot fully solve the air compression problem. Therefore, the present embodiment also provides the following technical solution. A buffer elastic capsule 8 is provided on the diversion air duct 7. Specifically, each group of diversion air ducts 7 includes an end connection pipe 71 and a connecting pipe 72. Among them, two end connection pipes 71 are provided, and the two end connection pipes 71 are respectively fixedly installed on the two end covers 3. The two ends of the connecting pipe 72 are respectively connected to the end connection pipe 71 through the buffer elastic capsule 8, and the end connection pipe 71, the connecting pipe 72, and the buffer elastic capsule 8 are in communication with each other. Thus, in actual use, if the air compression effect formed by the moving seat 2 is relatively large, the air compression in the corresponding area can directly affect the buffer elastic capsule 8 closest to the end, causing the buffer elastic capsule 8 to expand. Then, by means of the expansion of the buffer elastic capsule 8, the air pressure can be buffered in a timely manner, avoiding the influence of excessive air pressure on the steel belt 4.

[0050] Refer to the attached drawings of the specification Figure 13 and Figure 14 , the present embodiment also makes the following improvements to the buffer elastic capsule 8. Specifically, rotation sleeves 81 are fixedly connected to both ends of the buffer elastic capsule 8, and the two rotation sleeves 81 are respectively rotatably connected to the corresponding parts of the end connection pipe 71 and the connecting pipe 72. Thus, the rotation sleeve 81 can rotate around a fixed axis. At the same time, an impeller 82 is fixedly installed in the rotation sleeve 81, and multiple heat-conducting sheets 83 are fixedly installed on the side wall of the rotation sleeve 81. The heat-conducting sheets 83 extend into the inner cavity of the rotation sleeve 81, and the heat-conducting sheets 83 are of a flat heat-conducting structure. A heat dissipation end 84 is formed at the position where the heat-conducting sheets 83 extend out of the rotation sleeve 81.

[0051] It should be noted that when air passes through the buffer elastic capsule 8, the buffer elastic capsule 8 rotates under the action of the heat-conducting sheets 83, thereby strengthening the heat exchange around the buffer elastic capsule 8. Especially, the heat dissipation end 84 moves relative to the outside air. With the help of the heat-conducting sheets 83, the heat dissipation effect of the air in the buffer elastic capsule 8 can be improved, making up for the problem that the heat dissipation effect is affected by the poor heat-conducting effect of the small-foot material.

[0052] At the same time, when the buffer elastic capsule 8 rotates, the heat-conducting sheets 83 will generate a corresponding centrifugal effect, which has the effect of promoting the expansion of the buffer elastic capsule 8 and improving the emergency pressure buffering effect of the buffer elastic capsule 8.

[0053] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention.

Claims

1. A linear motor with high dust protection, comprising a motor housing (1) and a movable seat (2), wherein the movable seat (2) is slidably arranged on the motor housing (1), a steel belt (4) is further arranged on the top of the motor housing (1), an extension structure is arranged at an area where the movable seat (2) extends out of the top surface of the motor housing (1), a steel belt through-groove (22) is arranged at an area of the top of the movable seat (2) corresponding to the extension structure, and the steel belt (4) passes through the steel belt through-groove (22); It is characterized in that: The areas on both sides of the top of the motor housing (1) corresponding to the edges of the steel belt (4) are both provided with steel belt extrusion components (5), and the movable seat (2) is provided with an extrusion unlocking component (6), the steel belt extrusion component (5) includes an extrusion resistance increasing strip (51), the extrusion resistance increasing strip (51) is embedded in the top wall of the motor housing (1), the extrusion resistance increasing strip (51) cooperates with the edge of the steel belt (4), and an extrusion elastic member (52) is provided on the side of the extrusion resistance increasing strip (51) facing away from the steel belt (4); The extrusion unlocking assembly (6) includes a shifting guide bar (61), the shifting guide bar (61) is fixedly mounted on the movable seat (2), the extrusion resistance increasing bar (51) is provided with a shifting guide groove (53) for slidingly cooperating with the shifting guide bar (61), and the distance from the side of the shifting guide bar (61) away from the edge of the steel strip (4) to the edge of the steel strip (4) is greater than the distance from the inner wall of the shifting guide groove (53) away from the edge of the steel strip (4) to the edge of the steel strip (4); The motor housing (1) is a U-shaped structure, and end covers (3) are fixedly installed at both ends of the motor housing (1). A slide rail assembly (12) is installed inside the motor housing (1). The movable seat (2) is slidably matched with the motor housing (1) through two sets of slide rail assemblies (12). The top of the motor housing (1) is provided with a fitting portion that fits with the steel belt (4), and a first magnetic strip (13) is installed in the fitting portion of the motor housing (1). A plurality of groups of air guide pipes (7) are provided on the outside of the motor housing (1), and both ends of the air guide pipes (7) extend to both ends of the motor housing (1) and are fixedly connected to the end covers (3) at both ends of the motor housing (1), and both ends of the air guide pipes (7) pass through the corresponding end covers (3) and are in communication with the inner cavity of the motor housing (1).

2. The linear motor with high dust-proof protection according to claim 1, characterized in that: A stator (11) is installed inside the motor housing (1), a mover (21) is fixedly installed at the bottom of the movable seat (2), and guide rollers (23) for guiding the steel belt (4) to bend are provided at both ends of the steel belt through-groove (22), and both ends of the shifting guide bar (61) extend out of the end of the movable seat (2) and form a guide portion, and dust shielding components (24) are provided between the front and rear ends of the top extension structure of the movable seat (2) and the steel belt (4), and the dust shielding component (24) is fixedly installed at the bottom of the top extension structure of the movable seat (2), and the dust shielding component (24) adopts a brush structure.

3. The linear motor with high dust-proof protection according to claim 2, characterized in that: A lining structure is provided in the extrusion resistance increasing strip (51) corresponding to the shifting guide groove (53), the shifting guide groove (53) is formed in the lining structure, the lining is made of plastic material, and lubricating oil is provided in the shifting guide groove (53).

4. The linear motor with high dust-proof protection according to claim 3, characterized in that: A second magnetic strip (62) is respectively installed between the side of the shifting guide strip (61) facing away from the edge of the steel strip (4) and the side of the shifting guide groove (53) facing away from the edge of the steel strip (4), and the magnetic poles of the two sets of the second magnetic strips (62) on the sides that cooperate with each other are opposite.

5. The linear motor with high dust-proof protection according to claim 4, wherein: A plurality of independent cavities (521) are provided inside the extruded elastic member (52) along the length direction of the extruded elastic member (52), and a connecting hole (522) communicating with the inner cavity of the motor housing (1) is provided at the bottom of the independent cavity (521).

6. The linear motor with high dust-proof protection according to claim 5, characterized in that: Each group of the air guide pipes (7) comprises an end pipe (71) and a connecting pipe (72), wherein two end pipes (71) are provided, and the two end pipes (71) are fixedly mounted on the two end covers (3), respectively. Both ends of the connecting pipe (72) are connected to the end pipe (71) via a buffer elastic sac (8), and the end pipe (71), the connecting pipe (72) and the buffer elastic sac (8) are interconnected.

7. The linear motor with high dust-proof protection according to claim 6, characterized in that: Both ends of the buffer elastic sac (8) are fixedly connected to a rotating sleeve (81), and the two rotating sleeves (81) are rotatably connected to corresponding parts of the end pipe (71) and the connecting pipe (72), respectively. An impeller (82) is fixedly installed in the rotating sleeve (81), and a plurality of groups of heat conducting plates (83) are fixedly installed on the side wall of the rotating sleeve (81). The heat conducting plates (83) extend into the inner cavity of the rotating sleeve (81), and the heat conducting plates (83) are flat heat conducting structures. The heat conducting plates (83) extend out of the rotating sleeve (81) to form a heat dissipation end (84).

8. The linear motor with high dust-proof protection according to claim 7, characterized in that: The two ends of the steel belt (4) are connected to the end cover (3) via steel belt fixers (41), respectively. The steel belt fixer (41) is slidably mounted on the end cover (3), and an elastic member is provided between the steel belt fixer (41) and the end cover (3). The elastic member is used to provide an elastic force to the steel belt fixer (41) toward the outside of the motor housing (1).

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