Motor braking device and linear motor

Abstract

The invention discloses a motor braking device and a linear motor, and the motor braking device comprises a mounting seat which is used for being connected to a rotor of the linear motor so as to synchronously move along with the rotor; the braking mechanism is arranged on the mounting seat and is used for being matched with a guide rail of the linear motor for braking; the power transmission mechanism comprises a conductive part and an electric brush part, the conductive part is used for being arranged in the extending direction of a guide rail of the linear motor and connected into a power source of the linear motor to transmit current, and the electric brush part is arranged on the mounting base or a rotor of the linear motor and keeps sliding contact with the conductive part; wherein the braking mechanism is connected with the electric brush piece, and the braking mechanism obtains the current transmitted on the conductive piece through the electric brush piece so as to release braking of the linear motor. According to the invention, the linear motor can be automatically braked in case of sudden power failure, and a complicated cable does not need to be connected, so that the problem of cable winding caused by motor movement is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of linear motor technology, and in particular to a motor braking device and a linear motor. Background Technology

[0002] Currently, linear motors are widely used in automation equipment, CNC machine tools, medical instruments, rail transportation, aerospace, and defense due to their advantages such as high power density, simple structure, stable operation, rapid response, and precise positioning. However, during normal operation, if a sudden power outage occurs, the linear motor's mover cannot stop immediately, especially in transmission line applications, where it may collide with the mover in front. Furthermore, when the control system fails, it cannot quickly stop the moving mover, potentially posing a safety hazard.

[0003] Therefore, current linear motor systems are equipped with brakes to ensure braking in the event of a sudden power outage or system control failure, thus protecting system safety. However, existing linear motor brakes mostly use permanent magnet brakes, which require expensive magnets and necessitate external power supply lines to the braking mechanism, easily leading to cable tangling and affecting the operation of the motor system. Summary of the Invention

[0004] This invention provides a motor braking device and a linear motor, which solves the problem of power supply cable entanglement in existing linear motor brakes.

[0005] In a first aspect, embodiments of the present invention provide a motor braking device for mounting and braking a linear motor, comprising: a mounting base for connecting to the mover of the linear motor for synchronous movement; a braking mechanism disposed on the mounting base for engaging with the guide rail of the linear motor for braking; and a power transmission mechanism including a conductive element and a brush element, wherein the conductive element is disposed along the extension direction of the guide rail of the linear motor and connected to the power supply of the linear motor for transmitting current, and the brush element is disposed on the mounting base or the mover of the linear motor and maintains sliding contact with the conductive element; wherein the braking mechanism is connected to the brush element, and the braking mechanism obtains the current transmitted on the conductive element through the brush element to release the braking of the linear motor.

[0006] Furthermore, the braking mechanism includes an electromagnetic component and a braking element. The braking element is movably disposed on the mounting base, and the electromagnetic component is disposed on the mounting base. When the electromagnetic component is de-energized, the braking element connects to the guide rail of the linear motor to perform braking. When the electromagnetic component is energized, it drives the braking element to disengage from the guide rail of the linear motor to release the braking.

[0007] Furthermore, it also includes a rail clamping component, which is set and fixed along the guide rail of the linear motor, wherein when the electromagnetic component is de-energized, the braking component cooperates with the rail clamping component to perform braking.

[0008] Furthermore, the front end of the braking component is provided with a pin portion, and the rail component is provided with a plurality of spaced slots along the axial direction, wherein when the electromagnetic component is de-energized, the pin portion is inserted into the slots to perform braking.

[0009] Furthermore, the braking mechanism also includes a spring, and the rear end of the braking member is provided with a guide shaft. The mounting base is provided with a mounting hole, and the guide shaft is movably disposed in the mounting hole. The spring is sleeved on the guide shaft and housed in the mounting hole. When the electromagnetic component is energized, it drives the braking member to compress the spring to release the brake. When the electromagnetic component is de-energized, the braking member relies on the elastic force of the spring to cooperate with the guide rail of the linear motor to perform braking.

[0010] Furthermore, the electromagnetic component includes an iron core and a magnetic coil. The iron core is fixed to the mounting base and located at the rear end of the braking component. The magnetic coil is sleeved on the iron core, and the brush is connected to the magnetic coil. When the magnetic coil is energized, it works with the iron core to generate an electromagnetic force that attracts the braking component away from the guide rail of the linear motor to release the brake.

[0011] Furthermore, the conductive element includes a first smooth wire and a second smooth wire, which are arranged parallel to each other along the guide rail of the linear motor. One of the first smooth wire and the second smooth wire transmits positive current, and the other transmits negative current.

[0012] Furthermore, the brush assembly includes a first brush and a second brush, wherein the first brush is disposed on the mounting base and slides in contact with the first smooth wire, and the second brush is disposed on the mounting base and slides in contact with the second smooth wire.

[0013] Furthermore, both the first brush and the second brush are provided with a rotating part and a contact part. The rotating parts of the first brush and the second brush are rotatably disposed on the mover of the linear motor. The contact part of the first brush is in sliding contact with the first smooth wire, and the contact part of the second brush is in sliding contact with the second smooth wire.

[0014] Secondly, embodiments of the present invention provide a linear motor, which includes a power supply, a mover, a guide rail, and the motor braking device described in the first aspect above.

[0015] This invention provides a motor braking device and a linear motor. The linear motor is used to brake the linear motor by mounting it. It includes: a mounting base for connecting to the mover of the linear motor for synchronous movement; a braking mechanism disposed on the mounting base for engaging with the guide rail of the linear motor for braking; and a power transmission mechanism including a conductive element and brushes. The conductive element is disposed along the extension direction of the guide rail of the linear motor and connected to the power supply of the linear motor to transmit current. The brushes are disposed on the mounting base or the mover of the linear motor and maintain sliding contact with the conductive element. The braking mechanism is connected to the brushes, and the braking mechanism obtains the current transmitted on the conductive element through the brushes to release the braking of the linear motor. The motor braking device of this application uses conductive parts that extend along the guide rail of the linear motor and are connected to the power supply of the linear motor to transmit current. Through the brush-type contact structure, the electrical energy transmitted on the conductive parts can be continuously obtained during the movement of the mover to power the braking mechanism. It can immediately trigger the braking action in case of sudden power failure or control failure of the linear motor, effectively preventing the mover from continuing to slide. It does not require cable connection, avoids the problem of cable entanglement, improves the safety and reliability of system operation, and has low design cost. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 An exploded view of the motor braking device provided in an embodiment of the present invention; Figure 2 An assembly diagram of the motor braking device and the linear motor provided in an embodiment of the present invention; Figure 3 A top view of the motor braking device provided in an embodiment of the present invention; Figure 4 A cross-sectional view of the motor braking device provided in an embodiment of the present invention; Figure 5 A perspective view of the motor braking device provided in an embodiment of the present invention; Figure 6 A bottom view of the motor braking device provided in an embodiment of the present invention; Figure 7 This is a bottom view of a partial structure of the motor braking device provided in an embodiment of the present invention; Figure 8 A perspective view of the braking component provided in an embodiment of the present invention; Figure 9 A perspective view of the mounting base provided in an embodiment of the present invention; Figure 10 A cross-sectional view of the motor braking device provided in an embodiment of the present invention; Figure 11 This is a top view of the motor braking device in the braking state provided in an embodiment of the present invention; Figure 12 This is a top view of the motor braking device in the non-braking state provided in an embodiment of the present invention; Figure 13 A left view of the motor braking device provided in an embodiment of the present invention; Figure 14 A right view of the motor braking device provided in an embodiment of the present invention; Figure 15 A perspective view of the brush component provided in an embodiment of the present invention; Figure 16 A top view of a linear motor provided in an embodiment of the present invention; Figure 17 A side view of a linear motor provided in an embodiment of the present invention; The labels for the attached figures are as follows: 100. Motor braking device; 10. Mounting base; 101. Mounting hole; 20. Braking mechanism; 21. Electromagnetic assembly; 211. Iron core component; 212. Magnetizing coil; 22. Braking component; 221. Guide shaft; 222. Ejector pin part; 23. Spring; 30. Power transmission mechanism; 31. Conductive component; 311. First smooth wire; 312. Second smooth wire; 32. Brush component; 321. First brush; 322. Second brush; 301. Rotating part; 302. Contact part; 40. Rail clamping component; 401. Slot; 200. Linear motor; 210. Mover; 220. Stator; 230. Guide rail. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. Furthermore, in the drawings, structures that are similar or identical are indicated by the same reference numerals.

[0020] See Figures 1 to 15 For details, please refer to Figure 1 and Figure 2 This invention provides a motor braking device 100, which is used to cooperate with a linear motor 200 for braking, such as... Figure 1 As shown, the linear motor 200 includes: a mounting base 10 for connecting to the mover 210 of the linear motor 200 to move synchronously with it; a braking mechanism 20 disposed on the mounting base 10 for cooperating with the guide rail 230 of the linear motor 200 for braking; and a power transmission mechanism 30 including a conductive element 31 and a brush element 32. The conductive element 31 is disposed along the extension direction of the guide rail 230 of the linear motor 200 and connected to the power supply of the linear motor 200 to transmit current. The brush element 32 is disposed on the mounting base 10 or the mover 210 of the linear motor 200 and maintains sliding contact with the conductive element 31. The braking mechanism 20 obtains the current transmitted on the conductive element 31 through the brush element 32 to release the braking of the linear motor 200.

[0021] In specific implementation, such as Figure 2 As shown, the motor braking device 100 is used in conjunction with the linear motor 200 to brake the linear motor 200. The linear motor 200 typically has a mover 210, a stator 220, and a guide rail 230. The mover 210 is the moving part of the motor, the stator 220 is the stationary part of the linear motor 200, and the guide rail 230 is the track for the mover 210. The guide rail 230 is generally mounted on the stator 220 and determines the motor's movement path. The mover 210 is slidably mounted on the guide rail 230 and moves along the guide rail 230. Braking the linear motor 200 involves braking the moving mover 210.

[0022] The motor braking device 100 of this embodiment is installed in conjunction with the mover 210, stator 220, and guide rail 230 of the linear motor 200. Specifically, the motor braking device 100 of this embodiment mainly includes a mounting base 10, a braking mechanism 20, and a power transmission mechanism 30. The mounting base 10 is used to connect to the mover 210 of the linear motor 200, so that it moves synchronously with the mover 210 of the linear motor 200. The mounting base 10 also serves as the mounting base for all components. The braking mechanism 20 is mounted on the mounting base 10 and is used to cooperate with the guide rail 230 of the linear motor 200 to brake the linear motor 200. The braking mechanism 20 controls the braking state of the linear motor 100 by current, which is supplied by the power transmission mechanism 30. The specific structure of the braking mechanism 20 will be described in detail below.

[0023] The power transmission mechanism 30 mainly includes a conductive element 31 and a brush element 32. The conductive element 31 is an exposed conductor structure. It is installed along the extension direction of the guide rail 230 of the linear motor 200 and connected to the power supply of the linear motor 200 to transmit current. Specifically, the linear motor 200 is typically driven by a DC power supply. The conductive element 31, connected to the power supply of the linear motor 200, receives DC power. When the linear motor 200 experiences a power outage, the current transmitted through the conductive element 31 disappears simultaneously. The guide rail 230 of the linear motor 200 can be configured as either a curved or straight track structure, and the conductive element 31 is adapted to fit the extension direction of the guide rail 230.

[0024] The brush element 32 is a brush structure and can be designed using graphite material. The brush element 32 can be designed on the mounting base 10 or mounted on the mover 210 of the linear motor 200, as long as it can move synchronously with the mover 210. The brush element 32 also maintains sliding contact with the conductive element 31, enabling current transmission during movement. When the mover 210 of the linear motor 200 moves, the brush element 32 slides relative to the conductive element 31 and maintains constant contact with it. The braking mechanism 20 obtains the current transmitted on the conductive element 31 through the brush element 32 to release the brake on the linear motor 200. That is, when the braking mechanism 20 is energized, it is in a released braking state for the linear motor 200; when it is de-energized, it is in a braking state for the linear motor 200. Therefore, in practical applications, when the linear motor 200 suddenly loses power, there is no current output from the power supply, resulting in no current transmission on the conductive element 31. The braking mechanism 20, unable to obtain the current to release the braking state through the brush element 32, will immediately brake the linear motor 200. When the power to the linear motor 200 is restored, the conductive element 31 can transmit current again, and the braking mechanism 20 obtains the current to release the braking state through the brush element 32, thereby releasing the braking of the linear motor 200. Overall, this achieves automatic braking of the linear motor 200 when power is lost and automatic release of braking when power is restored. Therefore, in practical applications, in the event of a sudden power outage or control system failure, this motor braking device 100 can quickly brake, stopping the moving part 210 of the linear motor 200, ensuring system safety. Furthermore, this motor braking device 100 does not require complex cabling, and the movement of the moving part 210 of the linear motor 200 will not cause cable entanglement or other problems, resulting in better reliability.

[0025] In one embodiment, reference is made to Figure 1 and Figure 4The braking mechanism 20 includes an electromagnetic component 21 and a braking element 22. The braking element 22 is movably disposed on the mounting base 10. The electromagnetic component 21 is disposed on the mounting base 10. When the electromagnetic component 21 is de-energized, the braking element 22 is connected to the guide rail 230 of the linear motor 200 for braking. When the electromagnetic component 21 is energized, it drives the braking element 22 to disengage from the guide rail 230 of the linear motor 200 to release the braking.

[0026] In specific implementation, the braking mechanism 20 mainly includes an electromagnetic component 21 and a braking element 22. The braking element 22 is a structural component made of a hard metal material, such as iron or an alloy. The braking element 22 is movably mounted on the mounting base 10 and can move correspondingly to the mounting base 10. The braking element 22 can brake by directly engaging with the guide rail 230 of the linear motor 200, or by engaging with other components mounted on the guide rail 230 of the linear motor 200. The electromagnetic component 21 is mounted on the mounting base 10 and connected to the braking element 22. The electromagnetic component 21 can be an electromagnet structure or designed as other electromagnetic drive structures. When the electromagnetic component 21 is de-energized, the braking element 22 connects to the guide rail 230 of the linear motor 200 and engages with it for braking, which can be achieved through frictional contact with the guide rail 230. When the electromagnetic component 21 is energized, it causes the braking element 22 to disengage from the guide rail 230 of the linear motor 200, thus releasing the braking.

[0027] Furthermore, referring to Figure 1 , Figure 2 as well as Figures 5 to 7 It also includes a rail clamp 40, which is set and fixed along the guide rail 230 of the linear motor 200. When the electromagnetic component 21 is de-energized, the braking component 22 cooperates with the rail clamp 40 to perform braking.

[0028] In specific implementation, the motor braking device 100 also includes a rail clamping component 40. The rail clamping component 40 is a structural component that matches the guide rail 230 of the linear motor 200. The rail clamping component 40 is set along the guide rail 230 of the linear motor 200 and fixed to the guide rail 230. In actual installation, it is installed by slotting the guide rail 230 of the linear motor 200, so that the rail clamping component 40 is embedded in the rail to complete the fixation. In specific applications, the rail clamping component 40 can be provided with a friction structure or a snap-fit ​​structure to cooperate with the braking component 22. When the electromagnetic component 21 is de-energized, the braking component 22 achieves braking by cooperating with the structure on the rail clamping component 40.

[0029] Furthermore, referring to Figures 4 to 8The front end of the braking component 22 is provided with a pin portion 222, and the rail component 40 is provided with a plurality of spaced slots 401 along the axial direction. When the electromagnetic component 21 is de-energized, the pin portion 222 is inserted into the slots 401 to perform braking.

[0030] In specific implementation, a pin portion 222 protrudes from the front end of the braking component 22, and the pin portion 222 is a raised structure. Several slots 401 are provided on the rail component 40, all of which are axially spaced along the rail component 40 and are evenly spaced, with the distance between adjacent slots 401 being as small as possible for more precise braking. When the electromagnetic component 21 is de-energized, the pin portion 222 inserts into the slot 401 and engages with the slot 401 on the rail component 40, thereby achieving braking. This engagement braking method provides better braking effect compared to friction braking. When the electromagnetic component 21 is energized, the pin portion 222 disengages from the slot 401, releasing the brake and ensuring the normal movement of the mover 210 of the linear motor 200.

[0031] In one embodiment, reference is made to Figure 1 , Figure 4 as well as Figures 8 to 12 The braking mechanism 20 further includes a spring 23. The rear end of the braking element 22 is provided with a guide shaft 221. The mounting base 10 is provided with a mounting hole 101. The guide shaft 221 is movably disposed in the mounting hole 101. The spring 23 is sleeved on the guide shaft 221 and received in the mounting hole 101. When the electromagnetic component 21 is energized, it drives the braking element 22 to compress the spring 23 to release the brake. When the electromagnetic component 21 is de-energized, the braking element 22 relies on the elastic force of the spring 23 to cooperate with the guide rail 230 of the linear motor 200 to perform braking.

[0032] In a specific implementation, the braking mechanism 20 may further include a spring 23. A guide shaft 221 protrudes from the rear end of the braking element 22. The guide shaft 221 is a cylindrical round shaft structure, and the number of guide shafts 221 can be multiple. A mounting hole 101 matching the guide shaft 221 is provided on the mounting base 10. The mounting hole 101 can be a blind hole structure, and its position and number correspond to the guide shaft 221. The guide shaft 221 is movably disposed within the mounting hole 101. The spring 23 is sleeved on the guide shaft 221 and housed within the mounting hole 101. The front end of the spring 23 abuts against the braking element 22, and the rear end abuts against the bottom of the mounting hole 101. The mounting hole 101, in conjunction with the guide shaft 221, provides a guiding effect to the braking element 22, allowing the braking element 22 to move linearly and extend / retract within the mounting hole 101. Spring 23 allows brake 22 to automatically return to its original position. When electromagnetic component 21 is energized, it drives brake 22 to overcome the elastic force of spring 23, thereby compressing spring 23 to release the brake. When electromagnetic component 21 is de-energized, without the restriction of electromagnetic component 21, brake 22 relies on the elastic force of spring 23 to cooperate with guide rail 230 of linear motor 200 for braking. Specifically, it can rely on the elastic force to press against guide rail 230 of linear motor 200 and make frictional contact with it, or rely on the elastic force to press against guide rail 230 of linear motor 200 and make locking contact with it, thereby achieving braking.

[0033] In one embodiment, reference is made to Figure 1 , Figure 4 as well as Figure 10 The electromagnetic component 21 includes an iron core 211 and a magnetizing coil 212. The iron core 211 is fixed to the mounting base 10 and located at the rear end of the braking component 22. The magnetizing coil 212 is sleeved on the iron core 211. The brush component 32 is connected to the magnetizing coil 212. When the magnetizing coil 212 is energized, it cooperates with the iron core 211 to generate an electromagnetic force that attracts the braking component 22 away from the guide rail 230 of the linear motor 200 to release the brake.

[0034] In specific implementation, the electromagnetic component 21 includes an iron core 211 and a magnetizing coil 212. The iron core 211 can be an E-shaped iron core or a structural component of other shapes. The iron core 211 is fixed to the mounting base 10 and located at the rear end of the braking component 22. A slot can be made in the mounting base 10 to accommodate the installation of the iron core 211. The magnetizing coil 212 is integrally sleeved on the iron core 211 to form an electromagnet structure. The brush component 32 is connected together with the magnetizing coil 212. In practical applications, when the linear motor 200 is normally powered on, the magnetizing coil 212 can obtain the current transmitted on the conductive component 31 through the brush component 32. When the current passes through the magnetizing coil 212 sleeved on the iron core component 211, a strong magnetic field is generated around the magnetizing coil 212, magnetizing the iron core component 211 into a temporary magnet. This generates an electromagnetic force that attracts the braking component 22, causing the braking component 22 to disengage from the guide rail 230 of the linear motor 200, thus releasing the brake and allowing the mover 210 of the linear motor 200 to move normally. When the linear motor 200 is powered off, its power supply has no current output, causing the magnetizing coil 212 to be de-energized. This results in the disappearance of the magnetic field, demagnetization of the iron core component 211, and the disappearance of the electromagnetic force. As a result, the braking component 22 is no longer restricted and moves towards the guide rail 230 of the linear motor 200 under the elastic force of the spring 23, thus cooperating with the guide rail 230 to achieve braking.

[0035] In one embodiment, reference is made to Figure 1 , Figure 13 as well as Figure 14 The conductive element 31 includes a first smooth wire 311 and a second smooth wire 312. The first smooth wire 311 and the second smooth wire 312 are parallel and spaced apart along the guide rail 230 of the linear motor 200. One of the first smooth wire 311 and the second smooth wire 312 transmits positive current and the other transmits negative current.

[0036] In a specific implementation, the conductive component 31 includes a first smooth wire 311 and a second smooth wire 312. The first smooth wire 311 and the second smooth wire 312 are parallel and spaced apart along the guide rail 230 of the linear motor 200. The first smooth wire 311 and the second smooth wire 312 can be bare copper wire structures or designed as other bare conductor materials. The smooth surface of the first smooth wire 311 and the second smooth wire 312 can reduce sliding friction. In specific applications, the first smooth wire 311 and the second smooth wire 312 are connected to the positive and negative terminals of the power supply of the linear motor 200, respectively. One of the first smooth wire 311 and the second smooth wire 312 transmits positive current and the other transmits negative current. It is possible that the first smooth wire 311 is connected to the positive terminal of the power supply to transmit positive current and the second smooth wire 312 is connected to the negative terminal of the power supply to transmit negative current, or the first smooth wire 311 is connected to the negative terminal of the power supply to transmit negative current and the second smooth wire 312 is connected to the positive terminal of the power supply to transmit positive current. The brush 32 provides positive and negative power to the magnetizing coil 212 of the braking mechanism 20 by contacting the first smooth wire 311 and the second smooth wire 312.

[0037] Furthermore, referring to Figure 1 , Figure 13 as well as Figure 14 The brush component 32 includes a first brush 321 and a second brush 322. The first brush 321 is in sliding contact with the first smooth wire 311, and the second brush 322 is in sliding contact with the second smooth wire 312.

[0038] In specific implementation, the brush component 32 includes a first brush 321 and a second brush 322. The first brush 321 is in sliding contact with the first smooth wire 311, and the second brush 322 is disposed on the mounting base 10 and is in sliding contact with the second smooth wire 312. The first brush 321 can be connected to one end of the magnetizing coil 212 of the braking mechanism 20, and the second brush 322 can be connected to the other end of the magnetizing coil 212 of the braking mechanism 20. Thus, by having the first brush 321 and the second brush 322 respectively cooperate with the first smooth wire 311 and the second smooth wire 312, a stable power supply is provided to the magnetizing coil 212 of the braking mechanism 20.

[0039] Furthermore, referring to Figure 15Both the first brush 321 and the second brush 322 are provided with a rotating part 301 and a contact part 302. The rotating parts 301 of the first brush 321 and the second brush 322 are rotatably mounted on the mover 210 of the linear motor 200. The contact part 302 of the first brush 321 is in sliding contact with the first smooth wire 311, and the contact part 302 of the second brush 322 is in sliding contact with the second smooth wire 312.

[0040] In specific implementation, both the first brush 321 and the second brush 322 are provided with a rotating part 301 and a contact part 302. The rotating part 301 is used to cooperate with the mover 210 of the linear motor 200 for installation, and the contact part 302 is used to contact the first smooth wire 311 and the second smooth wire 312. In specific applications, the rotating parts 301 of the first brush 321 and the second brush 322 can be rotatably mounted on the mover 210 of the linear motor 200. By providing a circular groove on the mover 210, the rotating part 301 is inserted into the circular groove to cooperate with it, thereby achieving rotation and maintaining insulation. The rotating part 301 is connected to the magnetizing coil 212 of the braking mechanism 20 through a wire. The contact portion 302 of the first brush 321 slides in contact with the first smooth wire 311, and the contact portion 302 of the second brush 322 slides in contact with the second smooth wire 312. The contact portion 302 can be set according to the shape of the first smooth wire 311 and the second smooth wire 312. Specifically, it can be designed to hug the first smooth wire 311 and the second smooth wire 312 so that it will not easily detach during sliding. With the rotating portion 301 being rotatably mounted relative to the mover 210, the brushes can maintain good contact during the movement of the mover 210.

[0041] In summary, the motor braking device of this application uses conductive components that extend along the guide rail of the linear motor and are connected to the power supply of the linear motor to transmit current. Through the brush-type contact structure, it can continuously obtain electrical energy transmitted on the conductive components during the movement of the mover to power the braking mechanism. It can immediately trigger the braking action in case of sudden power failure or control failure of the linear motor, effectively preventing the mover from continuing to slide. It does not require cable connection, avoids cable entanglement problems, improves the safety and reliability of system operation, and has low design cost.

[0042] See Figure 16 and Figure 17 This invention also provides a linear motor 200, which includes a power supply (not shown), a mover 210, a guide rail 230, and the motor braking device 100 described in the above embodiments. The motor braking device 100 is installed in conjunction with the mover 210 and the guide rail 230 to brake the motor mover 210.

[0043] Specifically, the guide rail is a track structure on the stator 220 of the linear motor 200. The mounting base 10 of the motor braking device 100 is connected to the mover 210 of the linear motor 200 to move synchronously with it. The braking mechanism 20 of the motor braking device 100 is located on the mounting base 10 and cooperates with the guide rail 230 to brake, preventing the mover 210 from moving. The conductive element 31 of the motor braking device 100 is arranged along the extension direction of the guide rail 230 and connected to the power supply to transmit the current output by the power supply. The brush element 32 of the motor braking device 100 can be located on the mover 210 and maintain sliding contact with the conductive element 31. The braking mechanism 20 obtains the current transmitted on the conductive element 31 through the brush element 32 to release the braking of the mover 210.

[0044] In practical applications, when the linear motor 200 suddenly loses power, the power supply to the linear motor has no current output, resulting in no current transmission on the conductive component 31. The braking mechanism 20 of the motor braking device 100 cannot obtain the current to release the braking state through the brush component 32, and will immediately brake the linear motor 200. When the power supply to the linear motor 200 is restored, the power supply continues to output current and transmit current through the conductive component 31. The braking mechanism 20 obtains the current to release the braking state through the brush component 32, thereby releasing the braking state on the mover 210. Overall, this achieves automatic braking upon power failure and automatic braking release upon power restoration, without requiring complex cabling, and the movement of the mover 210 will not cause cable entanglement.

[0045] In summary, the linear motor of this application, due to the adoption of the motor braking device provided in the embodiments of this application, is safer and more reliable in operation, and its reliability is improved.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A motor braking device, used for mounting with a linear motor to brake it, characterized in that, include: Mounting bracket for connecting to the mover of the linear motor to move synchronously with it; A braking mechanism is provided on the mounting base and is used to cooperate with the guide rail of the linear motor for braking. A power transmission mechanism includes a conductive element and a brush element. The conductive element is arranged along the extension direction of the guide rail of the linear motor and connected to the power supply of the linear motor to transmit current. The brush element is disposed on the mounting base or the mover of the linear motor and maintains sliding contact with the conductive element. The braking mechanism is connected to the brush element, and the braking mechanism obtains the current transmitted on the conductive element through the brush element to release the braking of the linear motor.

2. The motor braking device according to claim 1, characterized in that, The braking mechanism includes an electromagnetic component and a braking element. The braking element is movably disposed on the mounting base, and the electromagnetic component is disposed on the mounting base. When the electromagnetic component is de-energized, the braking element connects to the guide rail of the linear motor to perform braking. When the electromagnetic component is energized, it drives the braking element to disengage from the guide rail of the linear motor to release the braking.

3. The motor braking device according to claim 2, characterized in that, It also includes a rail clamp, which is set and fixed along the guide rail of the linear motor, wherein when the electromagnetic component is de-energized, the braking component cooperates with the rail clamp to perform braking.

4. The motor braking device according to claim 3, characterized in that, The front end of the braking component is provided with a pin portion, and the rail clamping component is provided with a number of spaced grooves along the axial direction. When the electromagnetic component is de-energized, the pin portion is inserted into the groove to perform braking.

5. The motor braking device according to claim 2, characterized in that, The braking mechanism further includes a spring, and the rear end of the braking component has a protruding guide shaft. The mounting base has a mounting hole, and the guide shaft is movably disposed in the mounting hole. The spring is sleeved on the guide shaft and housed in the mounting hole. When the electromagnetic component is energized, it drives the braking component to compress the spring to release the brake. When the electromagnetic component is de-energized, the braking component relies on the elastic force of the spring to cooperate with the guide rail of the linear motor to perform braking.

6. The motor braking device according to claim 2, characterized in that, The electromagnetic component includes an iron core and a magnetizing coil. The iron core is fixed to the mounting base and located at the rear end of the braking component. The magnetizing coil is sleeved on the iron core, and the brush component is connected to the magnetizing coil. When the magnetizing coil is energized, it works with the iron core to generate an electromagnetic force that attracts the braking component away from the guide rail of the linear motor to release the brake.

7. The motor braking device according to any one of claims 1-6, characterized in that, The conductive component includes a first smooth wire and a second smooth wire, which are arranged parallel to each other along the guide rail of the linear motor. One of the first smooth wire and the second smooth wire transmits positive current, and the other transmits negative current.

8. The motor braking device according to claim 7, characterized in that, The brush assembly includes a first brush and a second brush. The first brush is disposed on the mounting base and slides in contact with the first smooth wire, and the second brush is disposed on the mounting base and slides in contact with the second smooth wire.

9. The motor braking device according to claim 8, characterized in that, Both the first brush and the second brush are provided with a rotating part and a contact part. The rotating parts of the first brush and the second brush are rotatably mounted on the mover of the linear motor. The contact part of the first brush is in sliding contact with the first smooth wire, and the contact part of the second brush is in sliding contact with the second smooth wire.

10. A linear motor, characterized in that, It includes a power source, a mover, a guide rail, and the motor braking device as described in any one of claims 1-9.

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