Linear motor with freely adjustable guide rail

Abstract

The invention relates to the technical field of linear motors, in particular to a guide rail free adjustment type linear motor which comprises a top storage shell, a fixed permanent magnet and a filling mechanism, the top storage shell is fixedly mounted on the side wall of a fixed seat, a base is fixedly mounted on the side wall of the fixed seat, and a moving table is arranged on the side, away from the fixed seat, of the base; and two arc-shaped frames are fixedly installed on the side, close to the base, of the movable table, the ends, close to the base, of the two arc-shaped frames are fixedly connected with special-shaped frames correspondingly, and the sides, close to the top storage shell, of the two arc-shaped frames are fixedly connected with concave frames correspondingly. The device has the advantages that the movable table is far away from or close to the base to achieve flexible adjustment of the stroke length, when the stroke is increased, the connecting shell in the filling mechanism is driven by the positioning protruding block to fill the generated vacancy, operation is easy and fast, efficient work of the motor is ensured, and the efficiency is high regardless of long-stroke or short-stroke application. And the requirements can be met through simple electric push rod control, so that the adaptability of the equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors, and particularly to a linear motor with free adjustment of guide rails. Background Art

[0002] A linear motor with free adjustment of guide rails is a linear motor system with an adaptive guide rail adjustment function, which is usually applied to mechanical systems that require high precision, flexibility, and adaptive performance. It combines the characteristics of a linear motor and a guide rail system, and can automatically adjust the operating state of its guide rails according to load, temperature, or other operating conditions to ensure motion accuracy and stability.

[0003] The invention patent with the publication number of CN114257057A discloses a linear motor with free adjustment of guide rails, which includes a first linear motor, a second linear motor, and an extended linear motor. A telescopic mechanism is arranged between the first linear motor and the second linear motor, and a synchronous movement structure that moves between the first linear motor and the second linear motor after the first linear motor and the second linear motor are unfolded is arranged between the second linear motor and the extended linear motor. According to the length requirement of the used linear motor, the length of the linear motor is adjusted, and the maximum stroke distance of the movable working plate can be controlled. It has stronger adaptability and a wider application range, and can freely switch the maximum stroke of the linear motor.

[0004] When the above patent requires a longer stroke of the linear motor, the first linear motor and the second linear motor are pulled apart by the telescopic mechanism to form a gap, and then the extended linear motor is lifted into this gap through the synchronous movement structure and the lifting drive structure to complete the expansion of the stroke. Although the stroke can be increased, the operation is relatively complex and the flexibility is insufficient. Moreover, the stroke length of the linear motor system in the above patent is directly related to the external shape specifications, so the adaptability is poor. It is difficult to quickly adjust the stroke according to different requirements, and its stroke length is basically fixed, making it difficult to meet diverse application scenarios, thus resulting in poor practicality of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of poor practicality of the existing equipment, and to propose a linear motor with free adjustment of guide rails.

[0006] To achieve the above purpose, the present invention adopts the following technical scheme: A linear motor with free adjustment of guide rails, including a fixed seat, further including: Top storage case, the top storage case is fixedly installed on the side wall of the fixed seat, the side wall of the fixed seat is fixedly installed with a base, the top storage case and the base are on the same side of the fixed seat and above the base, a moving platform is arranged on the side of the base away from the fixed seat, two arc-shaped frames are fixedly installed on the side of the moving platform close to the base, the ends of the two arc-shaped frames close to the base are respectively fixedly connected with special-shaped frames, and the sides of the two arc-shaped frames close to the top storage case are respectively fixedly connected with concave-shaped frames. The concave-shaped frames are located above the special-shaped frames, and the concave-shaped frames are slidably connected with the inner wall of the top storage case. The special-shaped frames are connected to the base through a telescopic component; Fixed permanent magnets, there are multiple fixed permanent magnets, and the multiple fixed permanent magnets are fixedly installed on the top of the base. A mover block is arranged above the fixed permanent magnets. Multiple winding coils are fixedly installed inside the mover block. The mover block is connected to the base through a sliding component; Filling mechanism, the filling mechanism includes multiple connecting shells, and the multiple connecting shells are rotatably connected together to form a crawler structure. Moving permanent magnets are respectively clamped on the multiple connecting shells, and the distance between adjacent two moving permanent magnets is the same as the distance between adjacent two fixed permanent magnets.

[0007] Preferably, a first sliding groove and a second sliding groove are respectively arranged on both sides of the base. The first sliding groove is located below the second sliding groove. The two special-shaped frames are respectively slidably connected with the corresponding first sliding groove and second sliding groove. The telescopic component includes two electric push rods fixedly installed on the side wall of the fixed seat. The two electric push rods correspond to the two special-shaped frames respectively. Grooves are respectively arranged on the sides of the two special-shaped frames close to the fixed seat. The telescopic ends of the two electric push rods are respectively fixedly connected with the inner walls of the grooves of the corresponding special-shaped frames.

[0008] Preferably, third sliding grooves are respectively arranged on both sides of the base, and the third sliding grooves are located above the second sliding grooves. Two first convex blocks are fixedly installed on the inner wall of the mover block. The two first convex blocks are respectively slidably connected with the corresponding third sliding grooves. Second convex blocks are respectively fixedly installed at the bottom of both sides of the mover block. Storage grooves are respectively arranged on the tops of the two special-shaped frames. The two second convex blocks respectively correspond to the corresponding storage grooves.

[0009] Preferably, concave grooves are respectively arranged on one side of the two concave-shaped frames close to each other, arc grooves are respectively arranged on one side of the two arc-shaped frames close to each other, limiting grooves are respectively arranged on one side of the two special-shaped frames close to each other, the upper slot openings of the two arc grooves correspond to and communicate with the slot openings of the two concave grooves respectively, the lower slot openings of the two arc grooves correspond to and communicate with the slot openings of the two limiting grooves respectively, the concave grooves, arc grooves and limiting grooves are combined to form continuous slideways, and the two slideways are symmetrically distributed on both sides of a plurality of connecting shells. Positioning bumps are respectively fixedly connected to both sides of the plurality of connecting shells, and the positioning bumps are respectively slidably connected to the corresponding slideways. Elastic balls are respectively arranged at the top and bottom of the positioning bumps.

[0010] Preferably, rollers are arranged at the bottom of the moving platform, and a second driving wheel is arranged on the side wall of the moving platform. The second driving wheel is on the same side of the moving platform as the arc-shaped frame, the second driving wheel contacts the connecting shell, a first driving wheel is arranged on the inner wall of the top receiving shell, and the first driving wheel contacts the connecting shell.

[0011] Preferably, the arc-shaped frame is fixedly connected with an arc-shaped protective cover, and the arc-shaped frame and the protective cover form an arc-shaped cavity.

[0012] Preferably, an inclined receiving shell is fixedly installed at the bottom of the top receiving shell, an inclined extension plate is slidably connected to one side of the inclined receiving shell away from the fixed seat, and one end of the inclined extension plate away from the inclined receiving shell is fixedly connected to the protective cover.

[0013] Preferably, the protective cover, the inclined extension plate and the inclined receiving shell are made of materials that isolate magnetic fields.

[0014] Preferably, a plurality of gas cavities are arranged inside the mover block, the plurality of gas cavities are evenly distributed among the plurality of winding coils, heat dissipation components are respectively arranged inside the plurality of gas cavities, the heat dissipation components include heat dissipation frames, the heat dissipation frames are hermetically and slidably connected to the gas cavities, fins are arranged on the heat dissipation frames, springs are fixedly connected between the top of the heat dissipation frames and the inner wall top of the gas cavities, a plurality of heat conducting rods are fixedly installed at the top of the heat dissipation frames, and a mixed gas is filled in the gas cavities, and the mixed gas expands at [temperature in degrees Celsius].

[0015] Preferably, an air inlet is formed through the side wall of the fixed seat, and a fan is fixedly installed in the air inlet.

[0016] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention drives a special-shaped frame by using an electric push rod, and then pushes the moving platform away from or closer to the base, realizing flexible adjustment of the stroke length. When the stroke needs to be increased, the electric push rod extends, and the special-shaped frame pushes the moving platform away from the base. At the same time, the connection shell in the filling mechanism fills the generated vacancy driven by the positioning bump, which not only simplifies the operation process but also makes the adjustment of the stroke more flexible and rapid. Moving permanent magnets are clamped on these connection shells, and the distance between adjacent moving permanent magnets is the same as the distance between adjacent fixed permanent magnets, ensuring that the efficient working state of the motor is not affected. Whether it is a long-stroke or short-stroke application scenario, the requirements can be met through simple control of the electric push rod, thus greatly improving the adaptability of the system.

[0017] 2. The present invention is provided with a gas cavity inside the mover block. The gas cavity is filled with a mixed gas with a low coefficient of thermal expansion, and is equipped with a heat dissipation frame and a heat conduction rod. When the temperature of the winding coil rises, the heat dissipation frame and the heat conduction rod conduct heat, causing the temperature inside the gas cavity to rise. The pressure of the gas collision will overcome the elastic force and press the heat dissipation frame to descend, and the fins extend out from inside the mover block. At the same time, the wind blown out by the fan from the air inlet cools the heat dissipation frame, the fixed permanent magnet and the moving permanent magnet, which not only improves the heat dissipation efficiency but also avoids the influence of heat accumulation on the performance of the motor, thereby prolonging the service life of the motor.

[0018] 3. In the present invention, the mover block is slidably connected to the third chute on the base through the first bump installed inside it, ensuring that the mover block can move stably along a specific trajectory. At the same time, the second bump at the bottom of the mover block corresponds to the receiving groove at the top of the special-shaped frame, further ensuring the stability of the mover block during the movement when the stroke is extended. In addition, the use of elastic balls reduces the sliding friction force, making the positioning bump drive the connection shell to slide more smoothly, thus ensuring the motion accuracy and stability of the linear motor.

[0019] 4. In the present invention, the design of the arc cavity formed by the arc-shaped frame and the protective cover, as well as the inclined extension plate and the inclined receiving shell, further improves the protection effect on the connection shell and prevents the influence of solid particles on the movement of the mover block. In addition, the protective cover, the inclined extension plate and the inclined receiving shell are all made of materials that isolate the magnetic field, avoiding the influence of the magnetic field generated by the moving permanent magnet on the interaction between the mover block and the fixed permanent magnet. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of a linear motor with free-adjustable guide rails proposed by the present invention; Figure 2 is a schematic diagram of the structure of a linear motor with free-adjustable guide rails from another perspective proposed by the present invention; Figure 3 is a schematic diagram of the structure of the base of a linear motor with free-adjustable guide rails proposed by the present invention; Figure 4 Schematic diagram of the internal structure of a fixing seat, a base and a top storage case of a guide rail freely adjustable linear motor proposed by the present invention; Figure 5 Schematic diagram of the internal structure of a special-shaped frame of a guide rail freely adjustable linear motor proposed by the present invention; Figure 6 Schematic diagram of the structure of a mover block of a guide rail freely adjustable linear motor proposed by the present invention; Figure 7 Schematic diagram of the internal structure of a mover block of a guide rail freely adjustable linear motor proposed by the present invention; Figure 8 Schematic diagram of the structure of a heat dissipation frame part of a guide rail freely adjustable linear motor proposed by the present invention; Figure 9 Schematic diagram of the structure of a moving table and a connection shell part of a guide rail freely adjustable linear motor proposed by the present invention; Figure 10 Schematic diagram of the structure of a moving table and an arc-shaped frame part of a guide rail freely adjustable linear motor proposed by the present invention; Figure 11 Schematic diagram of the structure of a connection shell of a guide rail freely adjustable linear motor proposed by the present invention; Figure 12 Schematic diagram of the structure of another perspective of a connection shell of a guide rail freely adjustable linear motor proposed by the present invention.

[0021] In the figure: 1 fixing seat, 101 air inlet, 2 base, 201 first sliding groove, 202 second sliding groove, 203 third sliding groove, 3 fixed permanent magnet, 4 top storage case, 401 first driving wheel, 5 concave frame, 6 special-shaped frame, 601 limiting groove, 7 storage groove, 8 electric push rod, 9 inclined storage case, 901 inclined extension plate, 10 fan, 11 mover block, 12 first convex block, 13 second convex block, 14 winding coil, 15 gas cavity, 16 heat dissipation frame, 161 heat conduction rod, 17 moving table, 171 second driving wheel, 18 arc-shaped frame, 181 arc-shaped groove, 182 protective cover, 19 connection shell, 20 positioning convex block, 21 moving permanent magnet. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Refer to Figures 1 to 10, A guide rail freely adjustable linear motor, comprising a fixed seat 1 and a filling mechanism. A base 2 and a top storage shell 4 are fixedly installed on the side wall of the fixed seat 1. The top storage shell 4 and the base 2 are located on the same side of the fixed seat 1, and the top storage shell 4 is located above the base 2. A moving platform 17 is arranged on the side of the base 2 away from the fixed seat 1. Rollers are arranged at the bottom of the moving platform 17, so that the friction during the movement of the moving platform 17 is smaller and the movement is more stable. The side of the moving platform 17 close to the base 2 is set as an arc surface, and two arc-shaped frames 18 are fixedly installed. One end of each of the two arc-shaped frames 18 close to the base 2 is fixedly connected to a special-shaped frame 6 respectively. One side of each of the two arc-shaped frames 18 close to the top storage shell 4 is fixedly connected to a concave-shaped frame 5 respectively. The concave-shaped frame 5 is located above the special-shaped frame 6 and is slidably connected to the inner wall of the top storage shell 4. First chutes 201 and second chutes 202 are respectively arranged on both sides of the base 2. The first chute 201 is located below the second chute 202. The two special-shaped frames 6 are respectively slidably connected to the corresponding first chute 201 and second chute 202. Two electric push rods 8 are fixedly installed on the side wall of the fixed seat 1. The two electric push rods 8 correspond to the two special-shaped frames 6 respectively. Grooves are respectively arranged on one side of the two special-shaped frames 6 close to the fixed seat 1. The telescopic ends of the two electric push rods 8 are respectively fixedly connected to the inner walls of the grooves of the corresponding special-shaped frames 6. The electric push rods 8 drive the moving platform 17 to move away from or close to the base 2 through the special-shaped frames 6. A plurality of fixed permanent magnets 3 are fixedly installed on the top of the base 2. The plurality of fixed permanent magnets 3 are evenly distributed on the top of the base 2. Third chutes 203 are respectively arranged on both sides of the base 2, and the third chute 203 is located above the second chute 202. A mover block 11 is arranged on the base 2. The mover block 11 is located above the fixed permanent magnets 3. Two first protrusions 12 are fixedly installed on the inner wall of the mover block 11. The two first protrusions 12 are respectively slidably connected to the corresponding third chute 203. Second protrusions 13 are respectively fixedly installed at the bottom of both sides of the mover block 11. The two second protrusions 13 correspond to the two special-shaped frames 6 respectively. Storage grooves 7 are respectively arranged on the tops of the two special-shaped frames 6. The two second protrusions 13 respectively correspond to the storage grooves 7 on the corresponding sides. A plurality of winding coils 14 are fixedly installed inside the mover block 11. The external connection lines of the winding coils 14 are connected to an electronic controller between the power supply. The plurality of winding coils 14 conduct different magnitudes of current, and cooperate with the fixed permanent magnets 3 fixed on the top of the base 2 to realize the precise linear movement of the mover block 11.

[0024] The filling mechanism includes a plurality of connecting shells 19. The plurality of connecting shells 19 are rotatably connected together to form a crawler structure. On the sides of the two concave frames 5 close to each other, concave grooves are respectively provided. On the sides of the two arc-shaped frames 18 close to each other, arc-shaped grooves 181 are respectively provided. On the sides of the two special-shaped frames 6 close to each other, limiting grooves 601 are respectively provided. The upper ends of the two arc-shaped grooves 181 are correspondingly communicated with the openings of the two concave grooves. The lower ends of the two arc-shaped grooves 181 are correspondingly communicated with the openings of the two limiting grooves 601. The concave grooves, arc-shaped grooves 181 and limiting grooves 601 are combined to form continuous slideways. The two slideways are symmetrically distributed on both sides of the plurality of connecting shells 19. On both sides of the plurality of connecting shells 19, positioning bumps 20 are respectively fixedly connected. The two positioning bumps 20 are respectively slidably connected with the corresponding slideways. Elastic balls are respectively arranged at the top and bottom of the positioning bump 20. The elastic balls reduce friction, avoid direct contact between metals, and improve the service life of the system. At the same time, the elastic characteristics of the balls also make the movement of the positioning bump 20 in the slideway smoother, avoiding losses caused by excessive friction. When the stroke length of the linear motor needs to be increased, the electric push rod 8 extends, so that the special-shaped frame 6 pushes the moving platform 17 to move away from the base 2. There is a vacant space between the moving platform 17 and the base 2. The plurality of connecting shells 19 in the filling mechanism fill the vacant space under the drive of the positioning bumps 20. Moving permanent magnets 21 are respectively clamped on the plurality of connecting shells 19. The distance between adjacent two moving permanent magnets 21 is the same as the distance between adjacent two fixed permanent magnets 3, avoiding the influence of the extended stroke on the motor power and maintaining the efficient working state of the motor. After the stroke becomes longer, the mover block 11 moves between the moving platform 17 and the base 2. The second convex block 13 on the mover block 11 moves linearly along the receiving groove 7 at the top of the special-shaped frame 6, ensuring that the mover block 11 does not deviate from the track during the whole stroke, effectively improving the stability and precision of the system.

[0025] A second driving wheel 171 is arranged on the side wall of the moving platform 17. The second driving wheel 171 and the arc-shaped frame 18 are on the same side of the moving platform 17. The second driving wheel 171 contacts the connecting shell 19. A first driving wheel 401 is arranged on the inner wall of the top receiving shell 4. The first driving wheel 401 contacts the connecting shell 19. Small motors are respectively arranged inside the top receiving shell 4 and the moving platform 17, which are respectively used to drive the first driving wheel 401 and the second driving wheel 171 to rotate. When the stroke needs to be shortened again, the electric push rod 8 retracts, so that the moving platform 17 approaches the base 2, and drives the first driving wheel 401 and the second driving wheel 171 to rotate, so that the plurality of connecting shells 19 supplemented between the moving platform 17 and the base 2 move away from the base 2.

[0026] The arc-shaped frame 18 is fixedly connected with an arc-shaped protective cover 182. The arc-shaped frame 18 and the protective cover 182 form an arc-shaped cavity. Part of the connecting shell 19 is located in the arc-shaped cavity, which can further improve the protection effect on the connecting shell 19. The bottom of the top storage shell 4 is fixedly installed with an inclined storage shell 9. One side of the inclined storage shell 9 away from the fixed seat 1 is slidably connected with an inclined extension plate 901. One end of the inclined extension plate 901 away from the inclined storage shell 9 is fixedly connected with the protective cover 182. When the arc-shaped frame 18 moves away from the top storage shell 4, it drives the inclined extension plate 901 to move away from the inclined storage shell 9. When the arc-shaped frame 18 approaches the top storage shell 4, the inclined extension plate 901 is received into the inclined storage shell 9. The inclined extension plate 901 and the inclined storage shell 9 intercept the solid particles at the joint of the connecting shell 19, preventing them from falling to a position that affects the movement of the mover block 11. The protective cover 182, the inclined extension plate 901 and the inclined storage shell 9 are all made of materials that isolate the magnetic field (such as iron-nickel alloy and cobalt-based amorphous materials), avoiding the magnetic field generated by the moving permanent magnet 21 located above the mover block 11 and in the arc-shaped cavity from affecting the interaction between the mover block 11 and the fixed permanent magnet 3.

[0027] A plurality of gas cavities 15 are arranged inside the mover block 11. The plurality of gas cavities 15 are evenly distributed among the plurality of winding coils 14. Heat dissipation components are respectively arranged inside the plurality of gas cavities 15. The heat dissipation components include heat dissipation frames 16. The heat dissipation frames 16 are hermetically and slidably connected with the gas cavities 15. Fins are arranged on the heat dissipation frames 16, which helps to increase the heat dissipation surface area and improve the heat exchange efficiency. A spring is fixedly connected between the top of the heat dissipation frame 16 and the inner top wall of the gas cavity 15. The heat dissipation frame 16 can quickly conduct the temperature of the winding coils 14. A plurality of heat conduction rods 161 are fixedly installed on the top of the heat dissipation frame 16. The gas cavity 15 is filled with a mixed gas with a low coefficient of thermal expansion (a mixture of CO2 and SF6). An air inlet 101 is penetrated and opened on the side wall of the fixed seat 1. A fan 10 is fixedly installed inside the air inlet 101. The heat dissipation frames 16 and the heat conduction rods 161 conduct heat. After the internal temperature of the gas cavity 15 is higher than 60 °C, the pressure of the gas collision will overcome the spring force and press the heat dissipation frame 16 to descend, and the fins extend out from inside the mover block 11. The wind blown by the fan 10 from the air inlet 101 cools the heat dissipation frame 16, the fixed permanent magnet 3 and the moving permanent magnet 21. The fan 10 improves the cooling efficiency of the heat dissipation frame 16 and the permanent magnet through forced air flow, avoids heat accumulation, enhances the heat dissipation capacity of the entire system. The winding coils 14, the fixed permanent magnet 3 and the moving permanent magnet 21 will generate a large amount of heat during operation. Avoiding untimely heat dissipation can lead to a decline in motor performance, shortening of service life, or even damage, thereby improving the system stability.

[0028] In the present invention, a roller is installed at the bottom of the moving platform 17, and arc-shaped frames 18 are fixedly connected on both sides of the top. Special-shaped frames 6 are welded on the lower sides of the two arc-shaped frames 18. The special-shaped frames 6 are slidably connected with the first slide groove 201 and the second slide groove 202 on the outer side of the base 2. An electric push rod 8 is installed inside the fixed seat 1. The special-shaped frame 6 has a groove on the side facing the fixed seat 1, and the output end of the electric push rod 8 extends into the groove of the special-shaped frame 6 and is fixedly connected to the inner wall of the groove. The electric push rod 8 is controlled to extend or contract, and the special-shaped frame 6 moves with the moving platform 17 to stably move away from or approach the base 2. In the initial state, the moving platform 17 is in contact with the base 2, and an appropriate number of fixed permanent magnets 3 are installed on the top of the base 2. The base 2 A third slide groove 203 is opened on the top of the outer second slide groove 202, the mover block 11 is placed on the top of the base 2, and the first protrusion 12 installed on the inner side of the mover block 11 is slidably connected to the third slide groove 203, the mover block 11 moves along a specific trajectory, and a second protrusion 13 is welded on the bottom of the mover block 11. In the initial state, the second protrusion 13 is just located inside the storage groove 7 on the top of the special-shaped frame 6. Several winding coils 14 are installed inside the mover block 11, and an electronic controller is connected between the external connection line of the winding coil 14 and the power supply. Several winding coils 14 can connect currents of different sizes, and cooperate with the fixed permanent magnet 3 fixed on the top of the base 2 to achieve precise linear motion of the mover block 11.

[0029] The conventional linear motor has a large size according to its stroke and appearance, has poor adaptability, and cannot quickly adjust the stroke according to needs. The present device increases the stroke length of the linear motor by only controlling the electric push rod 8 to extend and move the movable table 17 away from the base 2. The extension of the electric push rod 8 causes several connecting shells 19 originally stored inside the top storage shell 4 and between the arc frame 18 to be added between the movable table 17 and the base 2. Several connecting shells 19 are rotatably connected together to form a structure similar to a "caterpillar track". A moving permanent magnet 21 is clamped inside each connecting shell 19. The distance between two adjacent moving permanent magnets 21 added between the movable table 17 and the base 2 is the same as the spacing between the fixed permanent magnets 3, which will not affect the power of the linear motor.

[0030] A concave-shaped frame 5 is fixedly connected to the top of the arc-shaped frame 18. The concave-shaped frame 5 is slidably connected through the top storage shell 4. Arc-shaped grooves 181 and limiting grooves 601 are respectively formed on the inner sides of the arc-shaped frame 18 and the special-shaped frame 6. The top and bottom slot openings of the arc-shaped groove 181 are smoothly communicated with the slot openings of the concave-shaped groove of the concave-shaped frame 5 and the limiting groove 601 respectively. Positioning bumps 20 are fixedly connected to both sides of each connecting shell 19. The positioning bumps 20 on both sides of the connecting shell 19 can slide inside the slot openings of the concave-shaped groove of the concave-shaped frame 5, the arc-shaped groove 181, and the limiting groove 601, and can only move along a specific track. Elastic balls are embedded at the top and bottom of the positioning bump 20. The elastic balls can greatly reduce the sliding friction force, enabling the positioning bump 20 to drive the connecting shell 19 to slide more smoothly. When the moving platform 17 moves away from the base 2, the "track" - type connecting shell 19 can easily fill the gap between the moving platform 17 and the base 2, and the moving permanent magnet 21 still maintains an array distribution with the fixed permanent magnet 3. When the moving block 11 moves to the position between the moving platform 17 and the base 2, the second bump 13 is limited by the storage groove 7 at the top of the special-shaped frame 6 and still maintains a stable linear motion.

[0031] When it is necessary to shorten the stroke again, control the electric push rod 8 to contract, and control the first driving wheel 401 and the second driving wheel 171 to rotate, so that the connecting shell 19 filled between the moving platform 17 and the base 2 is re - stored inside the top storage shell 4 and between the arc-shaped frame 18.

[0032] The arc-shaped frame 18 is fixedly connected with a protective cover 182, which can further improve the protection effect on the connecting shell 19. When the arc-shaped frame 18 moves, the inclined extension plate 901 fixedly connected to the top will also be stored inside the inclined storage shell 9 fixedly connected to the side wall of the fixed seat 1. The inclined extension plate 901 and the inclined storage shell 9 can guide the solid particles at the joint of the connecting shell 19 to a position that does not affect the movement of the moving block 11, and the protective cover 182, the inclined extension plate 901, and the inclined storage shell 9 are all made of materials that isolate the magnetic field. The magnetic field generated by the moving permanent magnet 21 above the moving block 11 and inside the protective cover 182 will not affect the interaction between the moving block 11 and the fixed permanent magnet 3.

[0033] When the temperature of the winding coil 14 is higher than 80 °C, both the damage and the energy loss will increase. A gas cavity 15 is formed between the winding coils 14 of the mover block 11. A heat dissipation frame 16 is connected to the top of the gas cavity 15 through a spring. The heat dissipation frame 16 can quickly conduct the temperature of the winding coil 14, and several heat conduction rods 161 are fixed on the top of the heat dissipation frame 16. The heat dissipation frame 16 is hermetically and slidably connected to the gas cavity 15. The gas cavity 15 is filled with a mixed gas with a low coefficient of thermal expansion. After the heat is conducted through the heat dissipation frame 16 and the heat conduction rods 161 to make the temperature of the gas cavity 15 higher than 60 °C, the pressure of the gas collision will overcome the spring force and press the heat dissipation frame 16 to descend. The fins of the heat dissipation frame 16 extend out from the inside of the mover block 11, and the wind blown by the fan 10 from the air inlet 101 can easily cool the heat dissipation frame 16, the fixed permanent magnet 3 and the moving permanent magnet 21.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A linear motor with free adjustment of guide rails, comprising a fixed seat (1), characterized in that, It further includes: A top storage case (4) fixedly installed on the side wall of the fixed base (1). A base (2) is fixedly installed on the side wall of the fixed base (1). The top storage case (4) and the base (2) are located on the same side of the fixed base (1) and above the base (2). A moving platform (17) is provided on the side of the base (2) away from the fixed base (1). Two arc-shaped frames (18) are fixedly installed on the side of the moving platform (17) close to the base (2). The ends of the two arc-shaped frames (18) close to the base (2) are respectively fixedly connected to a special-shaped frame (6). The sides of the two arc-shaped frames (18) close to the top storage case (4) are respectively fixedly connected to a concave-shaped frame (5). The concave-shaped frame (5) is located above the special-shaped frame (6). The concave-shaped frame (5) is slidably connected to the inner wall of the top storage case (4). The special-shaped frame (6) is connected to the base (2) through a telescopic component; Fixed permanent magnets (3), there are multiple fixed permanent magnets (3), and the multiple fixed permanent magnets (3) are fixedly installed on the top of the base (2). A mover block (11) is provided above the fixed permanent magnets (3). Multiple winding coils (14) are fixedly installed inside the mover block (11). The mover block (11) is connected to the base (2) through a sliding component; A filling mechanism, the filling mechanism includes multiple connecting shells (19), and the multiple connecting shells (19) are rotatably connected together to form a crawler structure. Moving permanent magnets (21) are respectively clamped on the multiple connecting shells (19), and the distance between adjacent moving permanent magnets (21) is the same as the distance between adjacent fixed permanent magnets (3).

2. The linear motor with free adjustment of guide rails according to claim 1, wherein On both sides of the base (2), a first chute (201) and a second chute (202) are respectively provided. The first chute (201) is located below the second chute (202). The two special-shaped frames (6) are respectively slidably connected to the corresponding first chute (201) and second chute (202). The telescopic component includes two electric push rods (8) fixedly installed on the side wall of the fixed base (1). The two electric push rods (8) correspond to the two special-shaped frames (6) respectively. Grooves are respectively provided on the sides of the two special-shaped frames (6) close to the fixed base (1). The telescopic ends of the two electric push rods (8) are respectively fixedly connected to the inner walls of the grooves of the corresponding special-shaped frames (6).

3. The linear motor with free adjustment of guide rails according to claim 1, characterized in that On both sides of the base (2), third chutes (203) are respectively provided, and the third chutes (203) are located above the second chutes (202). Two first convex blocks (12) are fixedly installed on the inner wall of the mover block (11). The two first convex blocks (12) are respectively slidably connected to the corresponding third chutes (203). Second convex blocks (13) are respectively fixedly installed at the bottom of both sides of the mover block (11). Storage grooves (7) are respectively provided at the tops of the two special-shaped frames (6). The two second convex blocks (13) respectively correspond to the corresponding storage grooves (7).

4. A guide rail freely adjustable linear motor according to claim 1, characterized in that, On one side of each of the two concave frames (5) close to each other, concave grooves are respectively provided. On one side of each of the two arc-shaped frames (18) close to each other, arc-shaped grooves (181) are respectively provided. On one side of each of the two special-shaped frames (6) close to each other, limiting grooves (601) are respectively provided. The upper slot openings of the two arc-shaped grooves (181) correspond to and communicate with the slot openings of the two concave grooves respectively. The lower slot openings of the two arc-shaped grooves (181) correspond to and communicate with the slot openings of the two limiting grooves (601) respectively. The concave grooves, arc-shaped grooves (181) and limiting grooves (601) form continuous slideways, and the two slideways are symmetrically distributed on both sides of a plurality of connecting shells (19). On both sides of the plurality of connecting shells (19), positioning bumps (20) are respectively fixedly connected, and the positioning bumps (20) are respectively slidably connected to the corresponding slideways. Elastic balls are respectively arranged at the top and bottom of the positioning bumps (20).

5. A guide rail freely adjustable linear motor according to claim 1, characterized in that, Rollers are arranged at the bottom of the moving platform (17). A second driving wheel (171) is arranged on the side wall of the moving platform (17). The second driving wheel (171) is on the same side of the moving platform (17) as the arc-shaped frame (18). The second driving wheel (171) contacts the connecting shell (19). A first driving wheel (401) is arranged on the inner wall of the top receiving shell (4), and the first driving wheel (401) contacts the connecting shell (19).

6. A guide rail freely adjustable linear motor according to claim 1, characterized in that, The arc-shaped frame (18) is fixedly connected with an arc-shaped protective cover (182), and the arc-shaped frame (18) and the protective cover (182) form an arc-shaped cavity.

7. A guide rail freely adjustable linear motor according to claim 6, characterized in that, An inclined receiving shell (9) is fixedly installed at the bottom of the top receiving shell (4). An inclined extension plate (901) is slidably connected to one side of the inclined receiving shell (9) away from the fixed seat (1). One end of the inclined extension plate (901) away from the inclined receiving shell (9) is fixedly connected to the protective cover (182).

8. A guide rail freely adjustable linear motor according to claim 7, characterized in that, The protective cover (182), the inclined extension plate (901) and the inclined receiving shell (9) are made of materials that isolate magnetic fields.

9. A guide rail freely adjustable linear motor according to claim 1, characterized in that, A plurality of gas cavities (15) are arranged inside the mover block (11). The plurality of gas cavities (15) are evenly distributed among a plurality of winding coils (14). Heat dissipation components are respectively arranged inside the plurality of gas cavities (15). The heat dissipation components include heat dissipation frames (16). The heat dissipation frames (16) are hermetically and slidably connected to the gas cavities (15). Fins are arranged on the heat dissipation frames (16). Springs are fixedly connected between the top of the heat dissipation frames (16) and the inner wall top of the gas cavities (15). A plurality of heat conduction rods (161) are fixedly installed at the top of the heat dissipation frames (16). A mixed gas is filled in the gas cavities (15), and the mixed gas expands at 60 °C.

10. A linear motor with free adjustment of guide rails according to claim 1, characterized in that, An air inlet (101) is penetrated and opened on the side wall of the fixed seat (1), and a fan (10) is fixedly installed in the air inlet (101).

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