Linear motor brake and linear motor

Abstract

The embodiment of the invention discloses a linear motor brake and a linear motor, and belongs to the field of motor control. Wherein the linear motor brake comprises a mounting seat which is connected with a rotor of the linear motor and moves along with the rotor; the braking part is movably arranged in the mounting seat and is in contact with the fixing part for braking, and the braking part comprises a first position in contact with the fixing part and a second position separated from the fixing part; the power generation assembly is arranged on the rotor or the mounting seat and generates current by means of a magnetic field emitted from a stator of the linear motor; the stator generates a magnetic field when the linear motor is powered on. The power generation assembly is arranged on the mounting base and located on one side of the braking part, magnetic force is generated through the current transmitted by the power generation assembly, and the magnetic force is used for moving the braking part to the second position; after the magnetic force disappears, the brake piece moves to the first position. According to the embodiment of the invention, the rotor of the linear motor can be immediately braked in situ, and the safety of the linear motor is improved.

Description

Technical Field

[0001] The present application relates to the field of motor control, and in particular to a linear motor brake and a linear motor. Background Art

[0002] Linear motors offer high efficiency, high power density, simple structure, high reliability, fast response, and precise positioning. They are widely used in automation equipment, CNC machine tools, medical equipment, rail transportation, aerospace, and the military. However, if a linear motor experiences an emergency power outage during normal operation, the motor's rotor cannot stop in place. This can lead to collisions with other objects under certain operating conditions, compromising the motor's safety. Summary of the Invention

[0003] The embodiments of the present application provide a linear motor brake and a linear motor to at least solve the technical problem of poor safety in the use of linear motors.

[0004] According to a first aspect of an embodiment of the present application, a linear motor brake is provided, comprising:

[0005] A mounting seat connected to the mover of the linear motor and moving with the mover;

[0006] a brake member movably disposed in the mounting seat and braked by contacting the fixing member, the brake member including a first position contacting the fixing member and a second position disengaged from the fixing member;

[0007] an electric component, disposed on the mover or the mounting seat, and generating current by relying on a magnetic field generated by a stator of the linear motor; wherein the stator generates the magnetic field when the linear motor is energized;

[0008] a power generating component, disposed on the mounting seat and located on one side of the brake member, and utilizing the current transmitted by the power generating component to generate a magnetic force, wherein the magnetic force is used to move the brake member to the second position;

[0009] A reset mechanism is used to move the brake member to the first position after the magnetic force disappears.

[0010] With this embodiment, when the linear motor loses power, the magnetic field generated by the stator disappears, rendering the generator component unable to generate current. Consequently, the magnetic force of the generator component disappears, causing the brake component to move to its first position. The friction between the brake component and the fixed component immediately stops the linear motor's mover, improving the motor's safety. Furthermore, because the generator component relies on the magnetic field to generate current, it does not require a power cord, facilitating the mover's movement and minimizing the risk of wire entanglement, further enhancing the linear motor's operational safety.

[0011] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the power generation component includes a first coil, and the first coil is sleeved on the permanent magnet of the mover.

[0012] With this implementation, the first coil generates current when the magnetic field changes, eliminating the need for a power cord and simplifying the structure, taking up little space, and facilitating installation. Furthermore, utilizing the permanent magnets in the mover helps increase the current generated by the first coil, ensuring sufficient current even with a small number of turns.

[0013] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the power generating component further includes a second coil, which can generate current under the action of a switch-controllable magnetic field.

[0014] Using this implementation method, the power-generating component includes a first coil and a second coil, both of which can generate current, so that the power-generating component can provide a larger current to the power-generating component, which helps to increase the magnetic force generated by the power-generating component and ensure that the power-generating component can drive the brake from the first position to the second position.

[0015] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the coil opening of the second coil faces the coil core of the stator;

[0016] The second coil generates current when the iron core coil of the stator facing the second coil is energized, and does not generate current when the iron core coil of the stator facing the second coil is de-energized.

[0017] With this implementation, the opening of the second coil faces the stator core, which can increase the current generated by the second coil. The second coil will not generate current when the stator core coil it faces is powered off, which helps save energy.

[0018] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the power generation component further includes a rectifier for inverting the current from alternating current to direct current.

[0019] By adopting this implementation method, it is possible to ensure that the power-generating component obtains the direct current required to generate magnetic force.

[0020] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the power-generating component includes a power-generating coil and a power-generating iron core;

[0021] The force-generating iron core is located in the mounting seat and on one side of the brake member, and the force-generating iron core and the brake member form a magnetic circuit;

[0022] The power generating coil is sleeved on the power generating iron core.

[0023] With this implementation, after the power-generating coil receives the current transmitted by the power-generating component, the power-generating iron core generates magnetic force, and after the magnetic force is applied to the brake member, the brake member is moved to the second position.

[0024] In conjunction with the first aspect, in an optional implementation of the embodiment of the present application, the power-generating iron core includes a base plate, a first column, a second column, and a third column, wherein the first column, the second column, and the third column are all connected to the same side of the base plate, the first column, the second column, and the third column are arranged in sequence, and the power-generating coil is sleeved on the second column;

[0025] After the force-generating coil is energized, the first column, the second column, the third column and the brake member form the magnetic circuit.

[0026] By adopting this implementation method, the stability of the power core can be improved and the generated magnetic force can be increased, ensuring that the brake member can be driven from the first position to the second position.

[0027] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the braking member includes a ejector pin and a base;

[0028] The thimble is connected to the base, the thimble is used to contact the fixing member, and the base is used to form the magnetic circuit with the power core.

[0029] With this implementation, when the ejector contacts the fixing part, it is easy to be inserted into the hole or slot space of the fixing part, so that the mover of the linear motor can be stopped immediately, reducing the probability of the mover colliding with other objects.

[0030] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the reset mechanism includes at least one elastic member provided in the mounting seat; the base is provided with a seat foot in contact with the elastic member;

[0031] The elastic member has a force for pushing the braking member toward the fixing member.

[0032] By adopting this implementation method, the brake part is pushed toward the fixed part by the elastic force of the elastic part, realizing the automatic movement of the brake part. At the same time, it is easy to ensure the contact force between the brake part and the fixed part by controlling and changing the size of the elastic force, thereby ensuring the timely braking of the mover.

[0033] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the stator serves as the fixing member in contact with the braking member, or the linear motor brake further includes the fixing member that is arranged corresponding to and fixedly installed with the braking member.

[0034] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the fixing member includes a plurality of insertion holes, the plurality of insertion holes are arranged along the moving path of the mover, and the braking member is inserted into the insertion holes when located at the first position.

[0035] With this implementation, the brake member is inserted into the socket when in the first position, which increases the interaction force between the brake member and the fixing member, so that the mover can be stopped in time and the brake member is unlikely to separate from the fixing member after stopping, thereby ensuring the stability of the mover's braking.

[0036] According to a second aspect of an embodiment of the present application, a linear motor is provided, comprising a mover, a stator, and the linear motor brake described above.

[0037] The technical effect obtained by the above-mentioned second aspect is similar to the technical effect obtained by the corresponding technical means in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the exploded structure of a linear motor brake provided in an embodiment of the present application;

[0039] Figure 2 is a front view of a linear motor and a brake in a transmission line provided by an embodiment of the present application;

[0040] Figure 3 is a top view of a linear motor and a brake in a transmission line provided in an embodiment of the present application;

[0041] Figure 4 is a bottom view of a linear motor and a brake in a transmission line provided in an embodiment of the present application;

[0042] Figure 5 is a cross-sectional view of a linear motor brake provided by an embodiment of the present application in an energized and engaged state;

[0043] Figure 6 1 is a top view of a linear motor brake provided by an embodiment of the present application in an energized and engaged state;

[0044] Figure 7 1 is a side view of a linear motor brake provided by an embodiment of the present application in an energized and engaged state;

[0045] Figure 8 1 is a front view of a linear motor brake provided by an embodiment of the present application in a power-off braking state;

[0046] Figure 9 This is a schematic diagram of the movement direction of a linear motor brake provided in an embodiment of the present application;

[0047] Figure 10This is a schematic structural diagram of a thimble in a linear motor brake provided in an embodiment of the present application.

[0048] Markings: 1. Mounting base; 2. Brake; 21. Ejector pin; 22. Base; 3. Fixing member; 31. Jack; 4. Power generation assembly; 41. First coil; 42. Second coil; 43. Rectifier; 5. Power generation assembly; 51. Power generation coil; 52. Power generation core; 521. Bottom plate; 522. First column; 523. Second column; 524. Third column; 6. Elastic member;

[0049] 100. Brake; 200. Stator; 300. Mover; 400. Guide rail. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0051] It should be understood that the “plurality” mentioned herein refers to two or more than two. In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as “first” and “second” are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit certain different

[0052] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0053] First, the terms involved in the embodiments of the present application are introduced.

[0054] Linear motor: A linear motor is a transmission device that converts electrical energy directly into mechanical energy for linear motion without any intermediate conversion mechanism. It generates linear motion through the electromagnetic interaction between the primary coil (stator) and the secondary coil (motor). Linear motors are also called linear motors, linear motors, linear actuators, and push rod motors.

[0055] The above introduces the terms involved in the embodiments of the present application.

[0056] Linear motors offer high efficiency, high power density, simple structure, high reliability, fast response, and precise positioning. They are widely used in automation equipment, CNC machine tools, medical equipment, rail transportation, aerospace, and the military. However, if a linear motor experiences an emergency power outage during normal operation, the motor's actuator cannot be immediately stopped. In particular, on transmission lines, a linear motor could collide with the actuator in front of it. Furthermore, if control fails, the actuator cannot be immediately stopped, potentially leading to safety issues.

[0057] Based on this, the embodiments of the present application provide a linear motor brake and a linear motor, which at least solve the following problems:

[0058] When a linear motor encounters an emergency (such as a sudden power outage), its mover cannot stop moving immediately, which may cause a safety accident.

[0059] At least have the following technical effects:

[0060] When a normally operating linear motor or a linear motor for a transmission line encounters an emergency (sudden power outage, control failure), its mover can be directly braked to prevent possible safety accidents.

[0061] Have at least one of the following characteristics:

[0062] 1. When the normally operating linear motor encounters an emergency (a situation where the motor rotor cannot be stopped immediately by normal drive control, such as a sudden power outage or control failure), the designed brake can immediately stop the linear motor rotor;

[0063] 2. The induction coil is used to power the brake coil that controls the braking action. There is no need to connect cables from the power supply to the brake, which facilitates the movement of the mover. Especially for linear motors used in transmission lines, the designed brake will not have the problem of wire entanglement.

[0064] 3. After emergency braking, if the mover wants to move again, the alternating current generated by the two induction coils will be converted into direct current through the AC-DC circuit and supplied to the brake coil of the brake to generate a strong suction force on the brake pin. After the brake is attracted, since there is almost no air gap between the brake pin and the E-shaped iron core, the current to maintain the attracted state is much smaller than that before the attraction. At this time, the smaller induced alternating current generated by the electric attraction coil can maintain the attracted state, achieving low energy consumption and high efficiency.

[0065] Next, the linear motor brake provided in the embodiment of the present application is further described, referring to Figure 1 The exploded schematic diagram of the linear motor brake is shown, and the linear motor brake includes the following contents.

[0066] The mounting base 1 is connected to the mover 300 of the linear motor and moves with the mover 300;

[0067] a brake member 2 movably disposed in the mounting seat 1 and braked by contacting the fixing member 3, wherein the brake member 2 includes a first position in contact with the fixing member 3 and a second position disengaged from the fixing member 3;

[0068] The power generating component 4 is provided on the mover 300 or the mounting base 1 and generates current by relying on the magnetic field generated by the stator 200 of the linear motor; wherein the stator 200 generates a magnetic field when the linear motor is energized;

[0069] The power generating component 5 is provided on the mounting base 1 and is located on one side of the brake member 2. The power generating component 5 generates a magnetic force using the current transmitted by the power generating component 4. The magnetic force is used to move the brake member 2 to the second position.

[0070] The reset mechanism is used to move the brake member 2 to the first position after the magnetic force disappears.

[0071] The power-generating component 4 cooperates with the force-generating component 5 to generate a magnetic force acting on the brake member 2. When the force-generating component 5 does not generate a magnetic force, the brake member 2 is in the first position. If the brake member 2 is not in the first position at this time, it will rely on other driving components to move the brake member 2 to the first position. Other driving components, such as motors and springs, will move the brake member 2 to the first position. The brake member 2 in the first position contacts the fixed component 3, generating friction between the two, which prevents the linear motor's mover 300 from moving. When the force-generating component 5 generates a magnetic force, the brake member 2 is in the second position. If the brake member 2 is not in the second position at this time, the magnetic force will drive the brake member 2 toward the second position until the brake member 2 moves to the second position.

[0072] Based on this situation, after the brake 100 is installed on the linear motor, when the linear motor is powered on, the stator 200 of the linear motor will generate a magnetic field, and this magnetic field will prompt the power-generating component 4 to generate current, so that the brake member 2 is restricted to the second position by the force-generating component 5. In other words, when the linear motor is powered on, the brake member 2 is not in contact with the fixed member 3, and the mover 300 of the linear motor can move. When the linear motor encounters an emergency such as a power outage or control failure, since the stator 200 of the linear motor loses power, the stator 200 no longer generates a magnetic field, and the power-generating component 4 cannot generate current, causing the magnetic force of the force-generating component 5 to disappear, and the brake member 2 moves to the first position, stopping the mover 300 of the linear motor.

[0073] The mounting base 1 provides mounting space for at least some components of the brake 100, such as the force-generating assembly 5. Therefore, the specific shape and structure of the mounting base 1 are not limited in this embodiment. The connection method between the mounting base 1 and the linear motor mover 300 can be determined according to actual needs, such as screw connection, welding, adhesive bonding, etc.

[0074] Braking element 2 comprises a device that utilizes friction between it and fixing element 3 to stop mover 300. Therefore, the shape, structure, and other configurations of braking element 2 can be customized based on practical needs and are not limited in this embodiment. For example, braking element 2 may include a friction surface containing friction particles, which contacts fixing element 3 to increase friction between the two elements. It should be noted that braking element 2 and fixing element 3 may be pluggable. For example, after moving to the first position, braking element 2 is inserted into fixing element 3. This scenario is also considered to utilize friction to stop mover 300.

[0075] The corresponding arrangement of the fixing member 3 and the braking member 2 means that the braking member 2 can contact the fixing member 3 through the movement of the braking member 2; for example, the fixing member 3 is arranged on one side of the braking member 2 and is spaced apart from the braking member 2. The fixing member 3 needs to be fixedly installed, and the so-called fixed installation refers to the installation relative to the mover 300. In other words, when the mover 300 moves, the fixing member 3 is in a stationary state. Specifically, for example, the fixing member 3 is installed on the track of the transmission line, the stator 200 of the linear motor is connected to the track, and the mover 300 of the linear motor moves along the stator 200. This installation method can achieve the fixed installation of the fixing member 3.

[0076] The electricity-generating component 4 generates current from the magnetic field emitted by the stator 200, primarily based on the principle of magnetoelectricity. It should be noted that the magnetic field emitted by the stator 200 must be variable. If the stator 200 is equipped with a device capable of generating a variable magnetic field when the linear motor is powered, the current can be generated directly from the magnetic field generated by this device. If the stator 200 does not have a device capable of generating a variable magnetic field when the linear motor is powered, one can be installed in the stator 200.

[0077] The power generating component 5 generates magnetic force by means of the current generated by the electricity generating component 4, which is mainly based on the principle of electromagnetism, and will not be described in detail in this embodiment.

[0078] In this embodiment, when the linear motor loses power, the magnetic field generated by the stator 200 disappears, rendering the generator assembly 4 unable to generate current. Consequently, the magnetic force of the force-generating assembly 5 disappears, and the brake element 2 moves to its first position. The friction between the brake element 2 and the fixed element 3 immediately stops the linear motor's mover 300, thereby improving the motor's safety. Furthermore, since the generator assembly 4 relies on the magnetic field to generate current, it does not require a power cord. This facilitates the movement of the mover 300 and reduces the risk of wire entanglement, further enhancing the safety of the linear motor.

[0079] Optionally, in a possible embodiment of the present application, the power generation component 4 includes a first coil 41 , and the first coil 41 is sleeved on the permanent magnet of the mover 300 .

[0080] The number of turns of the first coil 41 can be set according to the required current. The more turns the first coil 41 has, the greater the current.

[0081] In addition, in addition to generating current by the first coil 41 , the power generating component 4 can also generate current by providing a single conductor that cuts the magnetic flux lines.

[0082] With this implementation, when the magnetic field changes, the first coil 41 can generate current, so that the power generation component 4 does not need to be connected to a power cord and has a simple structure, takes up little space, and is easy to install. At the same time, the use of the permanent magnet of the mover 300 helps to increase the current generated by the first coil 41, thereby ensuring.

[0083] Optionally, in an optional implementation of the embodiment of the present application, the power generating component 4 further includes a second coil 42 , with a gap between the second coil 42 and the first coil 41 , and the second coil 42 can generate current under the action of a switch-controllable magnetic field.

[0084] The second coil 42 can have more turns than the first coil 41, allowing the second coil 42 to generate a larger current than the first coil 41, primarily generating a larger current. This allows for a greater magnetic force to drive the brake member 2 to move. Specifically, the first coil 41 and the second coil 42 can be spaced apart and arranged side by side.

[0085] Using this implementation method, the power generation component 4 includes a first coil 41 and a second coil 42. Both coils can generate current, so that the power generation component 4 can provide a larger current to the power generation component 5, which helps to increase the magnetic force generated by the power generation component 5 and ensure that the power generation component 5 can drive the brake part 2 from the first position to the second position.

[0086] Optionally, in an optional implementation of the embodiment of the present application, the coil opening of the second coil 42 faces the coil core of the stator 200;

[0087] The second coil 42 generates current when the iron core coil of the stator 200 facing the second coil 42 is energized, and does not generate current when the iron core coil of the stator 200 facing the second coil 42 is de-energized.

[0088] In one embodiment, the second coil 42 is used only when the brake member 2 requires a larger magnetic force to drive. Therefore, when the brake member 2 reaches the second position, the iron core coil of the stator 200 facing the brake member 2 can be de-energized to save energy.

[0089] With this implementation, the opening of the second coil 42 faces the coil core of the stator 200, which can increase the current generated by the second coil 42. The second coil 42 does not generate current when the iron core coil of the stator 200 it faces is powered off, which helps save energy.

[0090] Optionally, in an optional implementation of the embodiment of the present application, the power generation component 4 further includes a rectifier 43, and the rectifier 43 is used to invert the current from alternating current to direct current.

[0091] The rectifier 43 is a circuit that converts AC power into DC power. This embodiment does not limit the specific circuit structure of the rectifier 43. In other embodiments, the rectifier 43 can not only convert AC power into DC power but also adjust the voltage or current of the DC power, for example, by adding a boost circuit to the rectifier 43.

[0092] By adopting this implementation method, it is possible to ensure that the power-generating component 5 obtains the direct current required to generate magnetic force.

[0093] Optionally, in an optional implementation of the embodiment of the present application, the power-generating component 5 includes a power-generating coil 51 and a power-generating iron core 52;

[0094] The force core 52 is located in the mounting seat 1 and on one side of the brake member 2. The force core 52 and the brake member 2 form a magnetic circuit.

[0095] The power coil 51 is sleeved on the power core 52 .

[0096] In one embodiment, in order to form a magnetic circuit, the shape of the force-generating coil 51 can be designed independently, for example, the shape of the force-generating coil 51 can be designed to be E-shaped.

[0097] With this implementation, after the power-generating coil 51 receives the current transmitted by the power-generating component 4 , the power-generating iron core 52 generates magnetic force, and after the magnetic force is applied to the brake member 2 , the brake member 2 is moved to the second position.

[0098] Alternatively, in an optional implementation of the embodiment of the present application, the power-generating iron core 52 includes a bottom plate 521, a first column 522, a second column 523, and a third column 524. The first column 522, the second column 523, and the third column 524 are all connected to the same side of the bottom plate 521. The first column 522, the second column 523, and the third column 524 are arranged in sequence, and the power-generating coil 51 is sleeved on the second column 523.

[0099] After the force-generating coil 51 is energized, the first column 522 , the second column 523 , and the third column 524 form a magnetic circuit with the brake member 2 .

[0100] It should be noted that the shape of the force-generating iron core 52 is similar to an E-shape, but the specific shape of the force-generating iron core 52 is not limited in this embodiment, as long as it can form a magnetic circuit with the brake component 2.

[0101] By adopting this implementation, the stability of the power core 52 can be improved and the generated magnetic force can be increased, ensuring that the brake member 2 can be driven from the first position to the second position.

[0102] Optionally, in an optional implementation of the embodiment of the present application, the brake member 2 includes a ejector pin 21 and a base 22;

[0103] The ejector pin 21 is connected to the base 22 . The ejector pin 21 is used to contact the fixing member 3 . The base 22 is used to form a magnetic circuit with the power core 52 .

[0104] In one embodiment, the surface of the ejector pin 21 that contacts the fixing member 3 can be designed as required, including the shape of the ejector pin 21. Figure 10 The surfaces of the ejector pin 21 shown in the figure that contact the fixing member 3 are all flat surfaces, so as to increase the friction between the ejector pin 21 and the fixing member 3 .

[0105] With this implementation, when the ejector pin 21 contacts the fixing member 3 , it is easy to be inserted into the hole or slot of the fixing member 3 , so that the mover 300 of the linear motor can be stopped immediately, reducing the probability of the mover 300 colliding with other objects.

[0106] Optionally, in an optional implementation of the embodiment of the present application, the reset mechanism includes at least one elastic member 6 provided in the mounting seat 1; a foot in contact with the elastic member 6 is provided on the base 22;

[0107] The elastic member 6 has a force that pushes the braking member 2 toward the fixing member 3 .

[0108] In one embodiment, four mounting slots are provided in the mounting base 1, and four base feet are integrally formed on the side of the base 22 away from the ejector pin 21. An elastic member 6 (such as a spring) is placed in each mounting slot, and the four base feet correspond to the four mounting slots one by one.

[0109] By adopting this implementation method, the brake part 2 is pushed toward the fixed part 3 by relying on the elastic force of the elastic part 6, and the brake part 2 is automatically moved. At the same time, it is easy to ensure the contact force between the brake part 2 and the fixed part 3 by controlling and changing the size of the elastic force, thereby ensuring the timeliness of the braking of the mover 300.

[0110] Optionally, in an optional implementation of the embodiment of the present application, the stator 200 serves as a fixing part 3 in contact with the brake part 2 or the linear motor brake further includes a fixing part 3 corresponding to and fixedly installed with the brake part 2 .

[0111] That is to say, in some cases, the stator 200 can be directly used as the fixing member 3, and the brake member 2 can be brought into contact with the stator 200 to stop the brake member 300. In some cases, additional hardware is selected to be installed as the fixing member 3.

[0112] Optionally, in an optional implementation of the embodiment of the present application, the fixing member 3 includes a plurality of insertion holes 31 , and the plurality of insertion holes 31 are arranged along the moving path of the mover 300 , and the braking member 2 is inserted into the insertion holes 31 when it is in the first position.

[0113] It should be noted that the length and shape of the fixing member 3 are adapted to the stator 200 of the linear motor, that is, the length of the fixing member 3 is the same as the maximum moving distance of the mover 300, and the shape of the fixing member 3 is the same as the moving trajectory of the mover 300; for example, when the moving trajectory of the mover 300 is a straight line segment, the fixing member 3 is also a straight plate with multiple jacks 31 provided on the plate; when the moving trajectory of the mover 300 is an arc segment, the fixing member 3 is an arc-shaped plate, and the curvature is the same as the curvature of the moving trajectory.

[0114] With this implementation, the brake member 2 is inserted into the socket 31 when in the first position, which increases the interaction force between the brake member 2 and the fixing member 3, so that the mover 300 can be stopped in time and the brake member 2 is not likely to separate from the fixing member 3 after stopping, thereby ensuring the stability of the brake of the mover 300.

[0115] The embodiment of the present application further provides a linear motor, comprising a mover 300 , a stator 200 and the above-mentioned linear motor brake 100 .

[0116] In a specific implementation of the embodiment of the present application, the transmission line including the linear motor and the brake 100 has the following contents:

[0117] like Figure 1-10As shown, the transmission line includes a guide rail 400, a linear motor, and a brake 100, wherein the stator 200 of the linear motor is mounted on the guide rail 400, the length of the guide rail 400 being not less than the length of the stator 200, and the mover 300 of the linear motor is movably disposed on the stator 200 and can move along the stator 200. The brake 100 is mounted on the mover 300 and is primarily located below the mover 300.

[0118] The brake 100 is powered by an induction coil (which, according to Lenz's law, generates alternating current through interaction with the magnetic field generated by the stator 200 coil). This eliminates the need for a power cord connected from a power source to the brake 100. The linear motor brake 100 primarily consists of a static component and an actuator (the AC-DC converter and its components are not shown). The static component primarily includes a mounting base 1, a force-generating iron core 52, a force-generating coil 51, a fixing member 3, a first coil 41, and a second coil 42. The actuator primarily includes a pin 21 and an elastic member 6. The mounting base 1 contains a force core 52, a force coil 51, a thimble 21 and an elastic member 6, wherein the mounting base 1 is tightly connected to the force core 52, and the force coil 51 is sleeved in the middle of the force core 52 (specifically, the force core 52 is an E-shaped iron core); four elastic members 6 (specifically springs) are placed in the four cylindrical grooves of the mounting base 1, and the thimble 21 is axially slidably connected to the four cylindrical grooves of the mounting base 1 through its four cylindrical rods; the fixing member 3 is fixed to the guide rail 400 of the mover 300 of the linear motor by welding or screwing (the groove opening faces the thimble 21); the first coil 41 is wound on the permanent magnet of the mover 300; the ring opening direction of the second coil 42 faces the coil core of the stator 200 of the linear motor, and is welded to the mover 300 of the linear motor through its hollow round rod.

[0119] The induced voltages of the first coil 41 and the second coil 42 in the changing magnetic field above the stator 200 can be estimated according to the law of electromagnetic induction:

[0120] The induced voltage u1 (V) generated by the first coil 41 is:

[0121]

[0122] The induced voltage u2 (V) generated by the second coil 42 is:

[0123]

[0124] Note: is the rate of change of the magnetic flux in the coil; N1 and N2 are the number of turns of the first coil 41 and the second coil 42 respectively.

[0125] When the linear motor is in normal operation, the first coil 41 generates an induced voltage (current) in the changing magnetic field above the stator 200 of the linear motor. The induced voltage (current) is supplied with direct current to the power coil 51 through the AC-DC circuit (i.e., the rectifier 43). The power coil 51 generates a magnetic field and forms a magnetic circuit through the power core 52 and the base 22 (the power core 52 and the base 22 are close together with almost no air gap), thereby generating a suction force F that attracts the ejector pin 21. 吸 , so that the ejector pin 21 maintains a certain distance from the fixing member 3 (in the second position), specifically, the ejector pin 21 is separated from the socket 31, that is, the energized and attracted state is maintained, and the linear motor rotor 300 moves normally. At this time, the relationship between the force on the ejector pin 21 is: F 吸 + mg = F 弹 +F 支 (F 支 is the support force of the mounting base 1 on the ejector pin 21, mg is the weight of the brake 2, and F 弹 is the supporting force provided by the elastic member 6); when the linear motor is operating normally and encounters a sudden power outage, no induced current is generated in the first coil 41, the power-generating coil 51 is powered off, and no suction force can be generated on the ejector pin 21. The ejector pin 21 moves upward under the action of the elastic member 6 and is stuck in the socket 31 (in the first position), forming a power-off braking state, thereby stopping the mover 300 of the linear motor.

[0126] When the power is turned on and the machine is running again, due to the existence of the air gap, a large suction force is required to attract the ejector pin 21 to fit the force-generating core 52. At this time, current is generated through the first coil 41 and the second coil 42. That is, the core coil in the stator 200 directly below the second coil 42 needs to be supplied with alternating current to generate an alternating magnetic field. The second coil 42 can thereby generate an induced voltage (current). Together with the induced voltage (current) generated by the first coil 41, it is converted into direct current through the AC-DC circuit to supply the force-generating coil 51 to generate a sufficiently large suction force, sucking the ejector pin 21 back to fit the force-generating core 52 (that is, the second position). At this time, the core coil in the stator 200 directly below the second coil 42 can be de-energized, so that the linear motor mover 300 can operate normally while maintaining low energy consumption of the brake 100.

[0127] In particular, when used for a linear motor with a transmission line (curved, straight, or both), since the brake 100 of the present application is power-free, it is only necessary to set a straight or curved fixing member 3 according to the required running trajectory to achieve the braking effect in an emergency, without causing the power line to be entangled with the mover 300, thus facilitating the operation of the mover 300. In addition, according to the different friction forces required for braking the linear motor, the contact surface of the ejector pin 21 with different inclinations can be set to contact the fixing member 3 during braking. Figure 10The ejector pin 21 may also be designed to be planar, so that when the linear motor is braked, the contact surface between the ejector pin 21 and the fixing member 3 is planar, thereby immediately stopping the mover 300.

[0128] The current required to flow through the iron core coil in the stator 200 directly below the first coil 41 and the second coil 42 of the linear motor brake 100 so that the force coil 51 can generate a sufficiently large suction force to suck back the ejector pin 21 in the power-off braking state is set according to the simulation results.

[0129] The embodiments according to the present application are described above by way of example.

[0130] The sequence of the serial numbers or introduction of the embodiments of this application is for description only and does not represent the superiority or inferiority of the embodiments.

[0131] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A linear motor brake, characterized in that: include: A mounting seat connected to the mover of the linear motor and moving with the mover; a brake member movably disposed in the mounting seat and braked by contacting the fixing member, the brake member including a first position contacting the fixing member and a second position disengaged from the fixing member; an electric component, disposed on the mover or the mounting seat, and generating current by relying on the magnetic field generated by the stator of the linear motor; wherein the stator generates the magnetic field when the linear motor is energized; a power generating component, disposed on the mounting seat and located on one side of the brake member, and utilizing the current transmitted by the power generating component to generate a magnetic force, wherein the magnetic force is used to move the brake member to the second position; A reset mechanism is used to move the brake member to the first position after the magnetic force disappears.

2. The linear motor brake according to claim 1, characterized in that: The power generation component includes a first coil, and the first coil is sleeved on the permanent magnet of the mover.

3. The linear motor brake according to claim 1 or 2, characterized in that: The power generation component further includes a second coil, which is capable of generating current under the action of a switch-controllable magnetic field.

4. The linear motor brake according to claim 3, characterized in that: The coil opening of the second coil faces the coil core of the stator; The second coil generates current when the iron core coil of the stator facing the second coil is energized, and does not generate current when the iron core coil of the stator facing the second coil is de-energized.

5. The linear motor brake according to claim 1, characterized in that: The power generation component further includes a rectifier for converting the current from alternating current to direct current.

6. The linear motor brake according to claim 1, characterized in that: The power generating component includes a power generating coil and a power generating iron core; The force-generating iron core is located in the mounting seat and on one side of the brake member, and the force-generating iron core and the brake member form a magnetic circuit; The power generating coil is sleeved on the power generating iron core.

7. The linear motor brake according to claim 6, characterized in that: The power core includes a bottom plate, a first column, a second column and a third column, wherein the first column, the second column and the third column are connected to the same side of the bottom plate, the first column, the second column and the third column are arranged in sequence, and the power coil is sleeved on the second column; After the force-generating coil is energized, the first column, the second column, the third column and the brake member form the magnetic circuit.

8. The linear motor brake according to claim 6, characterized in that: The brake member includes a thimble and a base; The thimble is connected to the base, the thimble is used to contact the fixing member, and the base is used to form the magnetic circuit with the power core.

9. The linear motor brake according to claim 8, characterized in that: The reset mechanism includes at least one elastic member arranged in the mounting seat; the base is provided with a seat foot in contact with the elastic member; The elastic member has a force for pushing the braking member toward the fixing member.

10. The linear motor brake according to any one of claims 1-2 and 4-9, characterized in that: The stator serves as the fixing member and contacts the braking member, or the linear motor brake further includes the fixing member that is arranged corresponding to and fixedly installed with the braking member.

11. The linear motor brake according to claim 10, characterized in that: The fixing member includes a plurality of insertion holes, and the plurality of insertion holes are arranged along the moving path of the mover. When the braking member is located at the first position, the braking member is inserted into the insertion holes.

12. A linear motor, characterized in that: The linear motor brake comprises a mover, a stator and the linear motor brake according to any one of claims 1 to 11.

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