Linear motor with high dustproof protection

Abstract

The invention discloses a linear motor with high dustproof protection, and particularly relates to the technical field of linear motors, the linear motor comprises a motor shell and a moving seat, steel belt extrusion assemblies are arranged in the areas, corresponding to the edge of a steel belt, of the two sides of the top of the motor shell, an extrusion unlocking assembly is arranged on the moving seat, and each steel belt extrusion assembly comprises an extrusion resistance increasing strip. The extrusion resistance-increasing strip is embedded in the top wall of the motor shell, and an extrusion elastic piece is arranged on the side, away from the steel belt, of the extrusion resistance-increasing strip; the extrusion unlocking assembly comprises a shifting guide strip which is fixedly installed on the moving seat. The resistance increasing strip is extruded to be tightly attached to the edge of the steel belt, so that vertical friction force is provided for the steel belt, the attaching force of the steel belt on the motor shell is enhanced, the steel belt is kept relatively stable, a gap is not likely to be generated between the steel belt and the motor shell, and therefore the use stability of the linear motor is improved, and the dustproof effect of the linear motor is enhanced; the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors, and more particularly to a linear motor with high dust 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 through current. The permanent magnets can provide a constant magnetic field without the need for external current. When current passes through the stator windings or the mover coils, 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, forming a linear drive.

[0003] Among them, the stator and guide rail of the linear motor are both installed in the motor housing, and the mover slides with the guide rail in the motor housing, and the top of the sliding seat connected to the stator extends out of the motor housing, so as to install the corresponding 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 structure itself is open to avoid obstruction to the movement of the mover. For some usage scenarios, the use environment has high dust or debris and other debris. In order to prevent dust and debris from entering the motor housing and affecting the guide structure and coil structure in the linear motor, the top opening area of ​​the linear motor needs to be effectively protected.

[0004] In the existing technology, linear motors are mainly protected by steel belt sealing and accordion cover sealing. Compared with the accordion cover sealing structure, the steel belt sealing structure has a more compact structure, a relatively smaller overall volume, stronger durability, and better protection performance, especially the ability to effectively protect against liquids. Therefore, in some processing scenarios, linear motors with steel belt sealing structures are more widely used.

[0005] Among them, the steel belt sealing structure is mainly made of thin stainless steel or galvanized steel plate. The width of the steel belt is adapted to the top opening area of ​​the linear motor housing to cover the opening area, and the two ends of the steel belt are connected to the two ends of the linear motor. At the same time, a through-groove structure is provided in the position where the moving seat extends out of the motor housing. The through-groove 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-groove structure to form a convex part in the moving seat. The bottom of the convex part and the area at the top of the motor housing can make the moving seat shaped At the same time, the front and rear ends of the moving seat have a pressing roller structure for pressing the steel belt downwards, ensuring that the two ends of the raised part can fully fit with the motor housing to form a seal, and because the steel belt has a certain feasible deformation ability, the steel belt can produce adaptive deformation when the moving seat moves, 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, and the rest of the steel belt structure fits with the motor housing to form a seal, thereby forming an effective dustproof effect.

[0006] Among them, due to the effective sealing of the steel belt, the linear motor housing forms effective protection. However, in order to adapt to the use space, some linear motors have a relatively compact structure and there is not much free space inside the motor housing. The existence of the mover divides the internal space of the motor housing into two spaces. The movement of the stator makes it 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, the air in the front space will be compressed. 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 compression effect of the above air is not large, and will not affect the use of the linear motor, but For usage scenarios with a large stroke and a fast required moving speed, the compression effect of the mover on the front space is relatively large. In severe cases, the steel belt structure in front will be pushed open, forming a gap between the edge of the steel belt structure and the motor housing, causing air to flow out. Especially when the mover moves rapidly in the opposite direction, the air pressure in the originally compressed area will decrease again, forming an air suction state from the outside to the inside before the steel belt gap is completely closed. When such linear motors are used for a long time and cause a lot of external dust and other debris to accumulate, the above situation will cause some dust or even no liquid to enter, thereby reducing the protection effect of 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, the compression effect on the front space is relatively large. In severe cases, the steel belt structure in the front will be pushed open, so that a gap will be formed between the edge of the steel belt structure and the motor housing, thereby reducing the protection effect of the linear motor and affecting the normal use of the linear motor.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a linear motor with high dust protection, comprising a motor housing and a moving seat, the moving seat is slidably arranged on the motor housing, a steel belt is further arranged on the top of the motor housing, an extension structure is arranged at the area where the moving seat extends out of the top surface of the motor housing, a steel belt through-groove is arranged at the area of ​​the top of the moving seat corresponding to the extension structure, and the steel belt passes through the steel belt through-groove; 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 extrusion components, and the moving seat is provided with an extrusion unlocking component, the steel belt extrusion component includes an extrusion resistance increasing strip, the extrusion resistance increasing strip is embedded and installed in the top wall of the motor housing, the extrusion resistance increasing strip cooperates with the edge of the steel belt, and an extrusion elastic member is provided on the side of the extrusion resistance increasing strip away from the steel belt; The extrusion unlocking assembly includes a shift guide bar, which is fixedly mounted on a moving 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 side of 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.

[0009] 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 portion, and dust shielding assemblies 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 assembly is fixedly installed at the bottom of the top extension structure of the movable seat, and the dust shielding assembly adopts a brush structure.

[0010] 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.

[0011] In a preferred embodiment, a second magnetic strip is installed between the side of the shifting guide strip 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 cooperating with each other are opposite.

[0012] In a preferred embodiment, a plurality of independent cavities are arranged 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 arranged at the bottom of the independent cavity.

[0013] In a preferred embodiment, the motor housing is a U-shaped structure, end covers are fixedly installed at both ends of the motor housing, a slide rail assembly is installed inside the motor housing, the movable seat slides 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.

[0014] In a preferred embodiment, a plurality of groups of air guide ducts are provided on the outside of the motor housing, and the two ends of the air guide ducts extend to the two ends of the motor housing respectively and are fixedly connected to the end covers at the two ends of the motor housing, and both ends of the air guide ducts pass through the corresponding end covers and are connected to the inner cavity of the motor housing.

[0015] 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. The two end connecting pipes are respectively fixedly mounted on two end covers. 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.

[0016] In a preferred embodiment, both ends of the buffer elastic sac are fixedly connected with 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 flat heat conducting structures. The position where the heat conducting plates extend out of the rotating sleeve forms a heat dissipation end.

[0017] 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 arranged 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.

[0018] The beneficial effect of the present invention is that the present invention provides an elastic force to extrude the steel belt to the extrusion resistance increasing strip through the extrusion elastic part. Under this elastic force, the extrusion resistance increasing strip is tightly attached to the edge of the steel belt, thereby providing a vertical friction force to the steel belt, strengthening the fitting strength of the steel belt on the motor housing, making the steel belt relatively stable and not easy to produce a gap with the motor housing, thereby improving the use stability of the linear motor, enhancing the dustproof effect of the linear motor, and improving the service life. As the moving seat continues to move, the matching area of ​​the shifting guide bar and the shifting guide groove also changes continuously, and the extrusion resistance increasing strip itself can produce adaptive deformation, so it can cooperate with the continuous movement of the moving seat and ensure the corresponding shifting effect. At the same time, the matching of the shifting guide bar and the extrusion resistance increasing strip, in addition to being able to control the extrusion of the extrusion resistance increasing strip, can also form a corresponding sealing structure, further improving the protection effect of the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 Schematic diagram of the internal structure of the linear motor of the present invention.

[0021] Figure 3 It is a top view of the movable seat of the present invention.

[0022] Figure 4 For the present invention Figure 3 A-section structure enlarged view.

[0023] Figure 5 It is a schematic diagram of the cooperation between the extrusion resistance increasing strip and the steel belt when the shifting guide strip of the present invention has not reached the shifting guide groove at the corresponding position.

[0024] Figure 6 It is a schematic diagram of the present invention when the shifting guide bar reaches the shifting guide groove at the corresponding position and drives the extrusion resistance increasing bar to leave the steel belt.

[0025] Figure 7 This is a schematic diagram of the cooperation between the extruded resistance-enhancing strip and the steel strip after the steel strip extrusion assembly is improved in the present invention.

[0026] Figure 8 It is a schematic diagram of the cooperation between the shifting guide bar and the shifting guide groove after the steel strip extrusion assembly is improved according to the present invention.

[0027] Fig. 9 This is a distribution diagram of the independent cavities in the improved extruded elastic member of the present invention.

[0028] Fig.10 The schematic diagram of the structure of the linear motor after adding the guide air duct in the present invention.

[0029] Fig.11 For the present invention Fig.10 Enlarged view of the structure of part B.

[0030] Fig.12 This is a diagram showing the coordination between the elastic buffer sac and the air guide tube of the present invention.

[0031] Fig.13 The schematic diagram is a structural diagram of the improved buffer elastic bladder according to the present invention.

[0032] Fig.14 It is a transverse cross-sectional view of the improved buffer elastic bladder of the present invention.

[0033] The accompanying drawings are marked as follows: 1. motor housing; 11. stator; 12. slide rail assembly; 13. first magnetic strip; 2. moving seat; 21. mover; 22. steel belt through groove; 23. guide roller; 24. dust shield assembly; 3. end cover; 4. steel belt; 41. steel belt fixer; 5. steel belt extrusion assembly; 51. extruded resistance-increasing strip; 52. extruded elastic member; 521. independent cavity; 522. connecting hole; 53. shifting guide groove; 6. extrusion unlocking assembly; 61. shifting guide strip; 62. second magnetic strip; 7. air guide pipe; 71. end connecting pipe; 72. connecting pipe; 8. buffer elastic sac; 81. rotating sleeve; 82. impeller; 83. heat conducting plate; 84. heat dissipation end. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0035] Refer to the instruction manual Figures 1 to 14A linear motor with high dust protection comprises 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 a U-shaped structure, end covers 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 in 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, and the top of the moving seat 2 extends out of the motor housing 1. On the top surface, a steel belt 4 is also provided on the top of the motor housing 1, and the two ends of the steel belt 4 are connected to the end cover 3 through steel belt fixtures 41 (wherein the steel belt fixture 41 is slidably mounted on the end cover 3, and an elastic member is provided between the steel belt fixture 41 and the end cover 3, and the elastic member is used to provide elastic force to the steel belt fixture 41 toward the outside of the motor housing 1, thereby forming elastic stretching on the steel belt 4 with the help of two sets of steel belt fixtures 41 to ensure the stability of the linear motor when in use), and a bonding member that fits with the steel belt 4 is provided on the top of the motor housing 1. The motor housing 1 has a first magnetic strip 13 (preferably a rubber magnetic strip) installed in the fitting portion, and when the steel strip 4 is fitted on the motor housing 1, the steel strip 4 can be adsorbed by means of the first magnetic strip 13, and a sealing effect is formed between the steel strip 4 and the motor housing 1, and the top of the movable seat 2 extends out of the top surface of the motor housing 1, and the region where the movable seat 2 extends out of the top surface of the motor housing 1 is provided with an extension structure to both sides, and the extension structure is arranged corresponding to the top surface of the motor housing 1, and a steel strip through-groove 22 is arranged in the region of the top of the movable seat 2 corresponding to the extension structure, and the steel strip 4 passes through the steel strip through-groove 22, and forms a structure protruding from the top surface of the motor housing 1 in the movable seat 2, and at the same time, guide rollers 23 for bending and guiding the steel strip 4 are arranged at both ends of the steel strip through-groove 22, so as to ensure that the top extension structure of the movable seat 2 can extend out of the motor housing 1, and the steel strip 4 can also fully cover the motor housing 1, so that the motor housing 1, the end cover 3 and the steel strip 4 form a relatively closed structure, and thus effectively prevent dust.

[0036] 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 piston phenomenon formed in the area inside the motor housing 1 by 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 with the motor housing 1), the present 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 extrusion components 5. The steel belt extrusion 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 extrusion 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 extrusion component 5 does not form an extrusion on the steel belt 4, so that the steel belt 4 forms a relative motion fit in the guide roller 23.

[0037] For details, please refer to the attached manual. Figures 2 to 6 The steel belt extrusion assembly 5 includes an extruded resistance-increasing strip 51, which is embedded and installed in the top wall of the motor housing 1, and the extruded resistance-increasing strip 51 has the ability to generate a relative micro-movement in the motor housing 1, and the extruded resistance-increasing strip 51 is preferably a rubber structure, and the extruded 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, the extruded resistance-increasing strip 51 cooperates with the edge of the steel belt 4, and an extruded elastic member 52 is provided on the side of the extruded resistance-increasing strip 51 away from the steel belt 4, and the extruded elastic member 5 2 is used to provide an elastic force for the extrusion resistance increasing strip 51 to press 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, and 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 still remain relatively stable and is not easy 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 prolonging its service life.

[0038] 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 for slidingly cooperating with the shifting guide bar 61 is provided on the extrusion resistance increasing strip 51. Specifically, the shifting guide bar 61 is located at the bottom of the extending structure on both sides of the top of the moving seat 2, that is, the shifting guide bar 61 is located at the matching area between the moving seat 2 and the top wall of the motor housing 1, and the distance from the side of 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 side 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 close to each other. In the area where the groove 53 cooperates, the shifting guide strip 61 forms an extrusion on the shifting guide groove 53, that is, the shifting guide groove 53 is shifted to deviate to the side away from the steel belt 4, so that the extrusion resistance increasing strip 51 does not form an extrusion with the edge of the steel belt 4, and in the area where the moving seat 2 has not reached, the shifting guide strip 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 strip 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 matching area between the shifting guide strip 61 and the shifting guide groove 53 is also constantly changing, but the extrusion resistance increasing strip 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.

[0039] 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 respectively extend out of the end of the moving seat 2 and form a guiding portion. That is to say, in the process of movement of the moving seat 2, the guiding portion 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, thereby ensuring that the steel belt 4 can smoothly produce an upward deformation at the end of the steel belt through-groove 22.

[0040] 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 extension structure 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, a labyrinth sealing structure can be formed to form a certain sealing effect). That is to say, except for the gap between the front and rear ends of the moving seat 2 and the steel belt 4, the rest of the parts form an effective seal, and the gap between the steel belt 4 and the front and rear ends of the moving seat 2 is relatively small, and external dust is not easy to enter. However, in order to enhance the sealing effect, refer to the attached manual. Fig.11A dust shield assembly 24 is provided between the front and rear ends of the top extension structure of the moving seat 2 and the steel belt 4. The dust shield assembly 24 is fixedly installed at the bottom of the top extension structure of the moving seat 2, that is, the dust shield assembly 24 is installed in the area where the front and rear ends of the steel belt through-groove 22 begin to cooperate with the steel belt 4. The bottom of the dust shield assembly 24 contacts the surface of the steel belt 4. The dust shield assembly 24 can adopt a low-friction smooth guide bar structure, such as a graphite bar structure, or a brush structure to prevent external dust from entering the steel belt through-groove 22, thereby further improving the protection effect of the linear motor.

[0041] In the above embodiment, the shifting guide groove 53 only needs to provide a lateral elastic force to the extruded resistance increasing strip 51. Therefore, the extruded elastic member 52 can use a spring structure evenly distributed along the length direction of the extruded resistance increasing strip 51, or other elastic structures. In this embodiment, in order to reduce costs, an integrated structure of the extruded resistance increasing strip 51 and the extruded elastic member 52 is adopted, that is, the two are processed from the same rubber strip, thereby facilitating the installation and use of the extruded resistance increasing strip 51.

[0042] In addition, for linear motors that are frequently used, 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 set in the extrusion resistance-increasing strip 51, and a lubricating oil or grease supplementary structure can also be set on the moving seat 2 to regularly supplement lubrication and reduce friction.

[0043] The friction is mainly caused by the extrusion friction between the inner wall of the guide groove 53 and the guide bar 61 when the guide groove 53 is moved. In order to reduce the friction, the steel strip extrusion assembly 5 is improved as follows in this embodiment. Figure 7 and Figure 8 A lining structure is provided at the position corresponding to the shifting guide groove 53 in the extrusion resistance increasing strip 51, and the shifting guide groove 53 is formed in the lining structure. The hardness of the lining structure is greater than the hardness 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, a second magnetic strip 62 (for example, a rubber magnetic strip) is respectively installed between the side of the shifting guide strip 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 sets of second magnetic strips 62 that cooperate with each other are opposite, and then when the shifting guide strip 61 cooperates with the shifting guide groove 53, the above-mentioned magnetic repulsive force can be used to provide extrusion of the shifting guide groove 53, thereby avoiding direct contact between the shifting guide strip 61 and the inner side wall of the shifting guide groove 53, or reducing the contact pressure between the two, thereby reducing the wear of the corresponding material and improving the service life of the corresponding structure.

[0044] Further, based on the solution of the extruded resistance increasing strip 51 and the extruded elastic member 52 as an integrated structure, this embodiment also provides the following solution. For details, refer to the attached specification. Figure 8 and Fig. 9 A plurality of independent cavities 521 are arranged inside the extruded elastic member 52 along the length direction of the extruded elastic member 52, and a connecting hole 522 connected to the inner cavity of the motor housing 1 is arranged at the bottom of the independent cavity 521, that is, while the elasticity of the extruded elastic member 52 itself provides elastic force to the extruded resistance-increasing strip 51, it can also be assisted by the air pressure inside the motor housing 1. For example, when the moving seat 2 moves forward, the air in the front area of ​​the moving seat 2 is compressed accordingly. At this time, since the independent cavity 521 in the corresponding area is connected to the inner cavity of the motor housing 1, the air pressure will act on the independent cavity 521 to increase the supporting force of the extruded elastic member 52 on the extruded resistance-increasing strip 51, thereby improving the extrusion effect of the extruded resistance-increasing strip 51 on the steel belt 4.

[0045] In addition to the above-mentioned method of increasing the fixing effect of the steel belt 4 to reduce the influence of the piston effect formed when the moving seat 2 moves, this embodiment also provides another method, which can be used independently, but in order to enhance the protection effect, this embodiment combines this method with the above-mentioned method. For details, refer to the attached manual. Fig.10 A plurality of groups of air guide pipes 7 are arranged on the outside of the motor housing 1, and the two ends of the air guide pipes 7 extend to the two ends of the motor housing 1 respectively, and are fixedly connected to the end covers 3 at the two ends of the motor housing 1, and both ends of the air guide pipes 7 pass through the corresponding end covers 3 and are connected to the inner cavity of the motor housing 1.

[0046] It should be noted that, in order to facilitate installation and save space, a corresponding groove can be provided at the bottom of the motor housing 1 to set the air guide pipe 7 in the groove, and by squeezing the unlocking component 6, the spaces at both ends of the motor housing 1 (with the moving seat 2 as the boundary) can be connected from the outside, and then when the moving seat 2 moves, the front air is compressed and can move to the rear space through the steel belt 4, thereby reducing the problem of serious air compression caused by the moving seat 2 moving too fast. At the same time, although the air guide pipe 7 is provided outside the motor housing 1, it is not connected to the outside air, so the independence of the air inside the motor housing 1 can still be guaranteed. At the same time, the air guide pipe 7 can be made of metal heat-conducting material, such as a copper tube. While forming the above-mentioned air flow, the air guide pipe 7 is in contact with the external environment, and the air flowing through the air guide pipe 7 can exchange heat, so that when the heat inside the motor housing 1 increases due to long-term use, the air in the motor housing 1 is quickly dissipated, thereby improving the protection effect of the internal components of the motor housing 1 and enhancing the service life of the linear motor.

[0047] Furthermore, although the setting of the above-mentioned guide air pipe 7 can effectively guide the air, in some usage scenarios, the moving speed of the moving seat 2 is too fast, the unidirectional moving stroke is too long, the overall length of the linear motor is too long, the length of the guide air pipe 7 is relatively large, and the air compensation effect of the air flowing through the guide air pipe 7 is relatively poor, which leads to the fact that the guiding effect of the guide air pipe 7 cannot fully solve the air compression problem. Therefore, this embodiment also provides the following technical solution: a buffer elastic sac 8 is provided on the guide air pipe 7. Specifically, each group of guide air pipes 7 includes an end connecting pipe 71 and a connecting pipe 72, wherein the end connecting pipe There are two tubes 71, and the two end tubes 71 are fixedly mounted on the two end covers 3 respectively. The two ends of the connecting tube 72 are connected to the end tubes 71 respectively through the buffer elastic sac 8, and the end tubes 71, the connecting tube 72 and the buffer elastic sac 8 are interconnected. Therefore, in actual use, if the air compression effect formed by the moving seat 2 is large, the compression of the air in the corresponding area can directly affect the buffer elastic sac 8 closest to the end, causing the buffer elastic sac 8 to expand, and then with the help of the expansion of the buffer elastic sac 8, the air pressure is timely buffered to avoid the influence of excessive air pressure on the steel belt 4.

[0048] Refer to the instruction manual Fig.13 and Fig.14 In this embodiment, the buffer elastic sac 8 is improved as follows. Specifically, both ends of the buffer elastic sac 8 are fixedly connected with a rotating sleeve 81, and the two rotating sleeves 81 are rotatably connected to the corresponding parts of the end connecting pipe 71 and the connecting pipe 72 respectively, so that the rotating sleeve 81 can rotate about a fixed axis. At the same time, 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 dissipation end 84 is formed at the position where the heat conducting plates 83 extend out of the rotating sleeve 81.

[0049] It should be noted that when air passes through the buffer elastic sac 8, the buffer elastic sac 8 rotates under the action of the heat conductive sheet 83, thereby strengthening the heat exchange around the buffer elastic sac 8, especially the relative movement between the heat dissipation end 84 and the outside air. With the help of the heat conductive sheet 83, the heat dissipation effect of the air in the buffer elastic sac 8 can be improved, compensating for the problem of affecting the heat dissipation effect due to the poor thermal conductivity of the material of the small foot.

[0050] At the same time, when the buffer elastic bladder 8 rotates, the heat conducting sheet 83 will produce a corresponding centrifugal effect, thereby causing the buffer elastic bladder 8 to expand, thereby improving the emergency pressure relief effect of the buffer elastic bladder 8.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A linear motor with high dust protection, comprising a motor housing (1) and a moving seat (2), wherein the moving 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 moving 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 moving seat (2) corresponding to the extension structure, and the steel belt (4) passes through the steel belt through-groove (22); Features: Steel strip squeezing assemblies (5) are provided in areas corresponding to the edges of the steel strip (4) on both sides of the top of the motor housing (1), and a squeezing unlocking assembly (6) is provided on the movable seat (2), the steel strip squeezing assemblies (5) comprising a squeezing resistance increasing strip (51), the squeezing resistance increasing strip (51) being embedded and installed in the top wall of the motor housing (1), the squeezing resistance increasing strip (51) being matched with the edge of the steel strip (4), and a squeezing elastic member (52) being provided on the side of the squeezing resistance increasing strip (51) facing away from the steel strip (4); The extrusion unlocking assembly (6) comprises a shifting guide bar (61), the shifting guide bar (61) being fixedly mounted on the moving seat (2), the extrusion resistance increasing bar (51) being 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 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).

2. A linear motor with high dust 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), guide rollers (23) for guiding the steel belt (4) to bend are arranged at both ends of the steel belt penetration 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 arranged 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 components (24) are fixedly installed at the bottom of the top extension structure of the movable seat (2), and the dust shielding components (24) adopt a brush structure.

3. A linear motor with high dust protection according to claim 2, characterized in that: An inner lining structure is provided in the extruded resistance increasing strip (51) at a position corresponding to the shifting guide groove (53); the shifting guide groove (53) is formed in the inner lining structure; the inner lining is made of plastic material; and lubricating oil is provided in the shifting guide groove (53).

4. A linear motor with high dust 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) that cooperate with each other are opposite.

5. A linear motor with high dust protection according to claim 4, characterized in that: A plurality of groups of independent cavities (521) are arranged 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 arranged at the bottom of the independent cavity (521).

6. A linear motor with high dust protection according to claim 5, characterized in that: 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). A fitting portion that fits with the steel belt (4) is provided at the top of the motor housing (1), and a first magnetic strip (13) is installed in the fitting portion of the motor housing (1).

7. A linear motor with high dust protection according to claim 6, characterized in that: A plurality of groups of air guide pipes (7) are arranged on the outside of the motor housing (1), and two ends of the air guide pipes (7) respectively extend to two ends of the motor housing (1) and are fixedly connected to the end covers (3) at two ends of the motor housing (1), and both ends of the air guide pipes (7) penetrate the corresponding end covers (3) and are in communication with the inner cavity of the motor housing (1).

8. A linear motor with high dust protection according to claim 7, 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 respectively fixedly mounted on two end covers (3), and both ends of the connecting pipe (72) are respectively 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.

9. A linear motor with high dust protection according to claim 8, 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 respectively rotatably connected to corresponding parts of the end pipe (71) and the connecting pipe (72). An impeller (82) is fixedly installed in the rotating sleeve (81), and a plurality of groups of heat conducting sheets (83) are fixedly installed on the side wall of the rotating sleeve (81). The heat conducting sheets (83) extend into the inner cavity of the rotating sleeve (81), and the heat conducting sheets (83) are flat heat conducting structures. The heat conducting sheets (83) extend out of the rotating sleeve (81) to form a heat dissipation end (84).

10. A linear motor with high dust protection according to claim 9, characterized in that: The two ends of the steel belt (4) are respectively connected to the end cover (3) via a steel belt fixer (41); 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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