Linear motor actuating mechanism and method
By designing the friction plates of the linear motor actuator to gradually contact and switch with the brake disc, and mechanically locking the locking components, the mechanical impact and precision problems caused by rigid emergency braking in traditional linear motor braking are solved, achieving a stable and gradual braking effect.
Patent Information
- Application Number
- CN202511534512.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2025-11-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional linear motor actuators suffer from mechanical impact damage, accuracy failure, and thermal runaway during braking due to rigid emergency braking. Furthermore, the friction clamping force decays over time, affecting machining accuracy.
A linear motor actuator was designed to achieve progressive braking by gradually switching from point friction to surface friction between the friction pad and the brake disc, combined with the mechanical structure of the locking component. This avoids direct, rigid emergency braking. Initial braking is achieved by using multi-point contact between the friction rod and the brake disc, followed by full-area contact. Combined with the mechanical locking of the locking pin, the clamping force is kept stable.
It effectively avoids mechanical shock and thermal runaway, ensures the stability and precision of the braking process, prevents the attenuation of friction clamping force, and achieves a smooth and stable braking effect.
Smart Images
Figure CN120991007A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of linear motor actuator technology, specifically to a linear motor actuator and method. Background Technology
[0002] The floating caliper disc brake for linear motors is a specialized braking device adapted to the linear motion characteristics of linear motors. Its core principle is based on the traditional floating caliper disc brake with single-sided drive, floating caliper body, and double-sided clamping. The structure is optimized for the linear motion characteristics of the linear motor's mover. By clamping the linear brake disc, which is rigidly connected to the linear motor's mover, the linear displacement of the mover is hindered, thus achieving deceleration or parking. Essentially, it converts rotary braking into linear braking while retaining the advantages of the floating caliper's compact structure and automatic clearance compensation. It is widely used in linear motor-driven lifting platforms, precision machine tool slides, and linear motor vehicles in rail transit.
[0003] Traditional floating caliper disc brakes mostly use rigid emergency braking, which can directly lead to mechanical impact damage, precision failure, thermal runaway and other problems. The emergency braking of rotary motors can buffer the impact through the elastic deformation of components such as gears and couplings. However, the moving part of a linear motor moves in a rigid linear motion. Rigid emergency braking will generate an axial impact that cannot be buffered. In addition, the driving principle of the linear motor in the traditional floating caliper disc brake is the electromagnetic coupling between the moving part and the stator. If the brake disc is clamped by the floating caliper alone, even a small external force may cause the moving part to shift, which will damage the machining accuracy. Moreover, the friction clamping force decays over time.
[0004] To address the aforementioned issues, there is an urgent need for innovative designs based on existing linear motor actuators and methods. Summary of the Invention
[0005] The present invention addresses the problem that existing technical solutions are too simplistic by providing a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide a linear motor actuator and method to solve the problems mentioned in the background.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a linear motor actuator, comprising a main body, a linear motor disposed on one side of the main body, a brake disc disposed inside the main body, brake components disposed on both sides of the brake disc, a friction pad fixed on one side of the brake component, and the brake component drives the friction pad to stop the rotating brake disc, a plurality of connecting plates are disposed at equal intervals inside the friction pad, a fixing ring is fixed on one side of the connecting plate and the fixing ring passes through the friction pad, an adjusting component is disposed inside the fixing ring, a friction rod is slidably connected inside the friction pad, and the adjusting component drives the friction rod to stop the rotating brake disc, a connecting frame is disposed on one side of the friction pad, a locking component is disposed at the bottom end of the connecting frame, a locking pin is disposed on one side of the locking component, and the locking component drives the locking pin to lock the stopped brake disc.
[0007] Preferably, the braking assembly includes a movable frame disposed on one side of the linear motor, a first movable frame fixed to the other side of the movable frame, a first fixed plate fixed to the bottom of the first movable frame, a second fixed plate disposed on one side of the first fixed plate, a second movable frame fixed to the bottom of the second fixed plate, a rotating plate disposed between the first movable frame and the second movable frame, the rotating plate being rotatably connected to the inner wall of the main body via a connecting shaft, and a movable rod fixed to the bottom of both the first movable frame and the second movable frame, the other end of the movable rod being fixedly connected to a friction plate.
[0008] Preferably, a first spring is provided between the first fixing plate and the second fixing plate, with one end of the first spring fixedly connected to one side of the first fixing plate and the other end of the first spring fixedly connected to the second fixing plate.
[0009] Preferably, a first connecting rod is fixed at the bottom of the protruding position of the first movable frame, and a second connecting rod is fixed at the top of the protruding position of the second movable frame. The first and second connecting rods are slidably connected to the rotating plate, and the rotating plate has a cavity that cooperates with the movement of the first and second connecting rods.
[0010] Preferably, the adjusting component includes a limiting ring fixed to one side of the connecting plate, the limiting ring being slidably connected to the friction rod, and the limiting ring having a cavity that cooperates with the sliding of the friction rod. A sliding column is slidably connected inside the fixing ring, and fixing blocks are symmetrically fixed to the inner wall of the sliding column. A push block is provided between the two fixing blocks, and the push block is in the shape of a "Z".
[0011] Preferably, the fixing block and the push block are slidably connected, the contact surfaces of the fixing block and the push block are both inclined surfaces, the push block passes through the limiting ring and the friction rod, and the limiting ring and the friction rod have cavities that cooperate with the push block.
[0012] Preferably, a second spring is provided inside the sliding column, one end of the second spring is fixedly connected to the inner wall of the sliding column cavity, and the other end of the second spring is fixedly connected to one end of the friction rod.
[0013] Preferably, the locking assembly includes a connecting block fixed to the bottom of the connecting frame, a lifting block slidably connected to the bottom of the connecting block, a sliding block fixed to the bottom of the lifting block, the sliding block slidably connected to the locking post, and a cavity is provided inside the sliding block to cooperate with the sliding of the locking post. A base is provided outside the sliding block, and the base is provided with a cavity to cooperate with the movement of the sliding block, the locking post and the lifting block.
[0014] Preferably, the sliding block is slidably connected to a fixed rod, the fixed rod is fixedly connected to a locking post, and the sliding block has a limiting groove that cooperates with the movement of the fixed rod.
[0015] A linear motor execution method includes the following steps: S1: Braking Trigger: When braking is required, such as when the driver steps on the brake or the system triggers a deceleration signal, the braking system first starts the linear motor to initially transmit the braking force to the moving frame, and the moving frame moves towards the brake disc; S2: Floating clamp body: The first and second moving frames are driven to move towards each other by the moving frame, so that the two friction pads move towards the brake disc until the friction rod set on one side of the friction pad contacts the surface of the brake disc; S3: Initial clamping braking: When the friction rod contacts the brake disc, the friction rods on both sides form a symmetrical clamping force on the brake disc. The intense friction between the friction rod and the brake disc converts the rotational kinetic energy of the brake disc into heat energy. S4: Final clamping brake: After the friction rod contacts the brake disc, the friction pad continues to move towards the brake disc, and the friction rod gradually retracts into the friction pad until the friction pad is tightly attached to the surface of the brake disc. The braking torque of the brake disc is transmitted to the ground through the shaft, which ultimately decelerates the wheel until it stops. S5: Brake Release: When the braking demand is released, such as when the brake is released or the deceleration signal is stopped, the system initiates brake reset. The friction pads and friction rods disengage from the brake disc along with the first and second moving frames, the brake disc resumes free rotation, and the braking process is completely ended.
[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, as the friction pad moves towards the brake disc, it simultaneously drives the connecting plate connected to it to move. When the connecting plate moves, the friction rod first contacts the surface of the brake disc. The initial braking force is generated through the point contact between multiple friction rods and the brake disc, achieving the effect of point friction braking. The contact area of point friction is small and the braking force is gentle, which can initially decelerate the brake disc and avoid the violent impact of direct surface friction. As the friction pad continues to move towards the brake disc, the friction rod is blocked by the brake disc and begins to retract into the fixed ring on one side of the connecting plate. When the friction rod retracts, the push block slidably connected inside it moves synchronously. The contact surface between the push block and the fixed block is an inclined surface. When the push block moves, it squeezes the fixed block through the inclined surface, driving the fixed block to move towards the connecting plate. The sliding column moves synchronously with the fixed block, and finally the friction rod is completely retracted into the fixed ring. The friction pad finally makes full contact with the surface of the brake disc. The large-area surface contact between the friction pad and the brake disc generates a strong and stable braking force. The braking force from point friction to surface friction is gradually increased, which can avoid the mechanical impact caused by rigid emergency braking.
[0017] 2. This invention is started by a linear motor, which drives the movable frame connected to it to slide inside the main body. The movable frame is fixed to the first movable frame, and the first movable frame slides synchronously with the movable frame. A first connecting rod is fixed at the bottom of the protruding position of the first movable frame. The rod is embedded in the cavity of the rotating plate. When the first movable frame slides, the first connecting rod pushes the rotating plate to rotate. When the rotating plate rotates, its cavity simultaneously pushes the second connecting rod to move. The second movable frame slides synchronously with the second connecting rod, ultimately realizing that the first movable frame and the second movable frame move towards each other, thereby causing the two friction plates to move synchronously towards the brake disc in the middle for bidirectional braking.
[0018] 3. In this invention, when the sliding column moves towards the connecting plate, it drives the connecting frame fixed at its bottom to move synchronously. The connecting frame drives the connecting block at the bottom to slide horizontally. The contact surface between the connecting block and the lifting block is an inclined surface. When the connecting block moves horizontally, it squeezes the lifting block through the inclined surface, causing it to move vertically within the base. The lifting block is fixed to the sliding block, and the sliding block moves vertically synchronously with the lifting block. The sliding block has a limit groove, in which a fixing rod fixed to the locking column is embedded. When the sliding block moves, the limit groove drives the fixing rod to slide horizontally, eventually causing the locking column to move towards the friction plate until it abuts against the friction plate. The locking column restricts the movement of the friction plate through rigid contact. Even if the clamping force of the friction plate decreases later, the locking column can still fix the friction plate in the position of clamping the brake disc through the mechanical structure, achieving static locking and ensuring that the brake disc does not loosen. Attached Figure Description
[0019] Figure 1 This is a structural schematic diagram showing the connection between the linear motor and the moving frame of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the braking assembly of the present invention; Figure 4 This is a three-dimensional schematic diagram of the braking component of the present invention. Figure 5 This is a schematic diagram showing the connection of the friction rod of the brake disc in this invention; Figure 6 This is a three-dimensional structural schematic diagram of the adjustment component of the present invention; Figure 7 This is a schematic side sectional view of the three-dimensional structure of the adjustment component of the present invention; Figure 8 This is a three-dimensional schematic side sectional view of another perspective adjustment component of the present invention; Figure 9 This is a structural schematic diagram showing the connection between the sliding column and the connecting frame of the present invention; Figure 10 This is a side sectional view illustrating the three-dimensional structure of the locking component of the present invention.
[0020] In the diagram: 1. Main body; 2. Linear motor; 3. Brake disc; 401. Moving frame; 402. First moving frame; 403. First connecting rod; 404. First fixing plate; 405. First spring; 406. Second fixing plate; 407. Second moving frame; 408. Second connecting rod; 409. Rotating plate; 410. Moving rod; 5. Friction plate; 6. Connecting plate; 7. Fixing ring; 8. Friction rod; 901. Limiting ring; 902. Fixing block; 903. Push block; 904. Second spring; 905. Sliding column; 10. Connecting frame; 111. Connecting block; 112. Lifting block; 113. Fixing rod; 114. Sliding block; 115. Limiting groove; 116. Base; 12. Locking column. Detailed Implementation
[0021] 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 embodiments of the present invention, and not all embodiments. 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.
[0022] Please see Figures 1 to 10This invention provides a technical solution: a linear motor actuator, comprising a main body 1, a linear motor 2 disposed on one side of the main body 1, a brake disc 3 disposed inside the main body 1, brake components disposed on both sides of the brake disc 3, a friction plate 5 fixed on one side of the brake component, and the brake component drives the friction plate 5 to stop the rotating brake disc 3, a plurality of connecting plates 6 are disposed at equal intervals inside the friction plate 5, a fixing ring 7 is fixed on one side of the connecting plate 6 and the fixing ring 7 passes through the friction plate 5, an adjustment component is disposed inside the fixing ring 7, a friction rod 8 is slidably connected inside the friction plate 5, and the adjustment component drives the friction rod 8 to stop the rotating brake disc 3, a connecting frame 10 is disposed on one side of the friction plate 5, a locking component is disposed at the bottom of the connecting frame 10, a locking pin 12 is disposed on one side of the locking component, and the locking component drives the locking pin 12 to lock the stopped brake disc 3.
[0023] In specific implementation, after the linear motor 2 on one side of the main body 1 is started, it drives the braking components on both sides of the brake disc 3 inside the main body 1, which in turn drive the friction pad 5 on one side of the braking component to move toward the running brake disc 3 to achieve initial braking. At the same time, the connecting plates 6, which are equidistantly arranged inside the friction pad 5, move synchronously with the friction pad 5. The adjusting component on one side of the connecting plate 6, which passes through the fixing ring 7 of the friction pad 5, will drive the friction rod 8, which is slidably connected inside the friction pad 5, to move synchronously toward the brake disc 3, assisting in stopping the running brake disc 3. When the brake disc 3 stops rotating, the locking component at the bottom of the connecting frame 10 on one side of the friction pad 5 is activated, which drives the locking pin 12 on one side of the locking component to lock the stopped brake disc 3, completing the entire braking and locking process.
[0024] As a further embodiment of the present invention, the braking assembly includes a movable frame 401 disposed on one side of the linear motor 2, a first movable frame 402 fixed on the other side of the movable frame 401, a first fixed plate 404 fixed at the bottom of the first movable frame 402, a second fixed plate 406 disposed on one side of the first fixed plate 404, a second movable frame 407 fixed at the bottom of the second fixed plate 406, a rotating plate 409 disposed between the first movable frame 402 and the second movable frame 407, the rotating plate 409 being rotatably connected to the inner wall of the main body 1 via a connecting shaft, and a movable rod 410 fixed at the bottom of both the first movable frame 402 and the second movable frame 407, the other end of the movable rod 410 being fixedly connected to the friction plate 5.
[0025] In practice, when braking is required, the linear motor 2 drives the moving frame 401 on one side to move, and the first moving frame 402, which is fixed to the moving frame 401, moves synchronously. The first moving frame 402 drives the second moving frame 407 through the rotating plate 409, which is rotatably connected to the inner wall of the main body 1. Finally, the first moving frame 402 and the second moving frame 407 drive the friction plate 5 at the other end of the moving rod 410, which is fixed at its bottom, to move towards the brake disc 3, in preparation for braking.
[0026] As a further embodiment of the present invention, a first spring 405 is provided between the first fixing plate 404 and the second fixing plate 406. One end of the first spring 405 is fixedly connected to one side of the first fixing plate 404, and the other end of the first spring 405 is fixedly connected to the second fixing plate 406.
[0027] In specific implementation, the first spring 405 is disposed between the first fixed plate 404 and the second fixed plate 406. One end of the spring is fixedly connected to one side of the first fixed plate 404, and the other end is fixedly connected to the second fixed plate 406. When the braking assembly is working, the first moving frame 402 drives the first fixed plate 404 to move, and the second moving frame 407 drives the second fixed plate 406 to move, so that the first fixed plate 404 and the second fixed plate 406 move closer to each other. At this time, the first spring 405 is compressed and stores elastic potential energy. When braking ends, as the moving frame 401 resets, the first spring 405 releases its elastic potential energy, pushing the first fixed plate 404 and the second fixed plate 406 to reset in the opposite direction, thereby driving the first moving frame 402, the second moving frame 407 and the friction plate 5 to return to their initial positions, preparing for the next braking.
[0028] As a further embodiment of the present invention, a first connecting rod 403 is fixed at the bottom of the protruding position of the first moving frame 402, and a second connecting rod 408 is fixed at the top of the protruding position of the second moving frame 407. The first connecting rod 403 and the second connecting rod 408 are slidably connected to the rotating plate 409, and the rotating plate 409 has a cavity that cooperates with the movement of the first connecting rod 403 and the second connecting rod 408.
[0029] In specific implementation, when the braking assembly is activated, the moving frame 401 drives the first moving frame 402 to move. The first moving frame 402 slides in the cavity of the rotating plate 409 through the first connecting rod 403, pushing the rotating plate 409 to rotate around the axis connected to the main body 1. During the rotation of the rotating plate 409, its cavity synchronously drives the second connecting rod 408 to move, thereby pulling the second moving frame 407 to move in the opposite direction with the first moving frame 402. Finally, the two moving frames synchronously drive the friction pad 5 to approach the brake disc 3, completing the transmission of braking power.
[0030] As a further embodiment of the present invention, the adjustment component includes a limiting ring 901 fixed on one side of the connecting plate 6. The limiting ring 901 is slidably connected to the friction rod 8, and the limiting ring 901 has a cavity that cooperates with the sliding of the friction rod 8. A sliding column 905 is slidably connected inside the fixing ring 7. Fixing blocks 902 are symmetrically fixed on the inner wall of the sliding column 905. A push block 903 is provided between the two fixing blocks 902, and the push block 903 is in the shape of a "Z".
[0031] In practice, when the friction plate 5 moves the connecting plate 6 toward the brake disc 3, the friction rod 8 first contacts the brake disc 3. As the friction plate 5 continues to move, the friction rod 8 is blocked by the brake disc 3 and slides along the cavity of the limiting ring 901 into the fixing ring 7. At this time, the friction rod 8 drives the "Z"-shaped push block 903 inside to move synchronously. The push block 903 contacts the inclined surface of the fixing block 902, pushing the fixing block 902 and the sliding column 905 fixed thereto to move toward the connecting plate 6. Finally, the friction rod 8 retracts into the fixing ring 7, creating conditions for the surface friction braking of the friction plate 5 and the brake disc 3.
[0032] As a further embodiment of the present invention, the fixing block 902 and the push block 903 are slidably connected, the contact surfaces of the fixing block 902 and the push block 903 are both inclined surfaces, the push block 903 passes through the limiting ring 901 and the friction rod 8, and the limiting ring 901 and the friction rod 8 are provided with cavities that cooperate with the push block 903.
[0033] In practice, when the friction rod 8 slides into the fixed ring 7 due to contact with the brake disc 3, the friction rod 8 drives the internal push block 903 to move synchronously along the cavity of the limiting ring 901. The push block 903 slides in contact with the fixed block 902 through the inclined surface. During its movement, it will generate a pushing force on the fixed block 902 in the direction of the connecting plate 6, thereby pushing the sliding column 905, which is fixedly connected to the fixed block 902, to move synchronously, providing power transmission support for the friction rod 8 to fully retract into the fixed ring 7 and switch to surface friction braking.
[0034] As a further embodiment of the present invention, a second spring 904 is provided inside the sliding column 905. One end of the second spring 904 is fixedly connected to the inner wall of the cavity of the sliding column 905, and the other end of the second spring 904 is fixedly connected to one end of the friction rod 8.
[0035] In practice, when the friction rod 8 slides into the fixed ring 7 due to contact with the brake disc 3, and the sliding column 905 moves towards the connecting plate 6 through the push block 903, the friction rod 8 and the sliding column 905 move in opposite directions. At this time, the second spring 904 between the two is compressed and stores elastic potential energy. When the braking ends and the friction plate 5 is reset, the second spring 904 releases elastic potential energy, generating reverse thrust on the friction rod 8 and the sliding column 905 respectively, pushing the friction rod 8 out of the fixed ring 7 and the sliding column 905 back to the initial position, preparing for the point friction start and structural reset during the next braking.
[0036] As a further embodiment of the present invention, the locking component includes a connecting block 111 fixed to the bottom of the connecting frame 10, a lifting block 112 slidably connected to the bottom of the connecting block 111, a sliding block 114 fixed to the bottom of the lifting block 112, the sliding block 114 slidably connected to the locking post 12, and a cavity is provided in the sliding block 114 to cooperate with the sliding of the locking post 12. A base 116 is provided outside the sliding block 114, and the base 116 is provided with a cavity to cooperate with the movement of the sliding block 114, the locking post 12 and the lifting block 112.
[0037] In specific implementation, when the connecting frame 10 drives the connecting block 111 to move, the connecting block 111 pushes the lifting block 112 to move vertically in the cavity of the base 116. The lifting block 112 drives the sliding block 114 to move synchronously. The sliding block 114 drives the locking pin 12 to slide through its own cavity, and finally makes the locking pin 12 move towards the friction plate 5 and abut against the friction plate 5, thereby locking the brake disc 3.
[0038] As a further embodiment of the present invention, the sliding block 114 is slidably connected to the fixed rod 113, the fixed rod 113 is fixedly connected to the locking post 12, and the sliding block 114 is provided with a limiting groove 115 that cooperates with the movement of the fixed rod 113.
[0039] In practice, when the lifting block 112 drives the sliding block 114 to move vertically in the cavity of the base 116, the sliding block 114 guides and drives the fixed rod 113 through the limiting groove 115, so that the fixed rod 113 slides along the trajectory of the limiting groove 115, thereby driving the locking pin 12 fixed thereto to move horizontally in sync, and finally realizes that the locking pin 12 moves closer to the friction plate 5 and abuts against the friction plate 5, thus completing the static locking of the brake disc 3.
[0040] A linear motor execution method includes the following steps: S1: Braking trigger: When braking is required, such as when the driver steps on the brake or the system triggers a deceleration signal, the braking system first starts the linear motor 2 so that the braking force is initially transmitted to the moving frame 401, and the moving frame 401 moves towards the brake disc 3. S2: Pliers floating: The first moving frame 402 and the second moving frame 407 are driven to move towards each other by the moving frame 401, so that the two friction pads 5 move towards the brake disc 3 until the friction rod 8 set on one side of the friction pad 5 contacts the surface of the brake disc 3. S3: Initial clamping braking: When the friction rod 8 contacts the brake disc 3, the friction rods 8 on both sides form a symmetrical clamping force on the brake disc 3. The intense friction between the friction rod 8 and the brake disc 3 converts the rotational kinetic energy of the brake disc into heat energy. S4: Final clamping brake: After the friction rod 8 contacts the brake disc 3, the friction pad 5 continues to move towards the brake disc 3, and the friction rod 8 gradually retracts into the friction pad 5 until the friction pad 5 is tightly attached to the surface of the brake disc 3. The braking torque of the brake disc 3 is transmitted to the ground through the shaft, and the wheels are finally decelerated until they stop. S5: Brake release: When the braking demand is released, such as when the brake is released or the deceleration signal is stopped, the system initiates brake reset. The friction pad 5 and friction rod 8 disengage from the brake disc 3 along with the first moving frame 402 and the second moving frame 407. The brake disc 3 resumes free rotation, and the braking process is completely ended.
[0041] Working principle: When braking is required, the braking system first starts the linear motor 2, which drives the moving frame 401 to slide inside the main body 1. Since the moving frame 401 and the first moving frame 402 are fixedly connected, the first moving frame 402 moves synchronously with the moving frame 401. When the first moving frame 402 moves, it drives the first connecting rod 403, which is fixed at the bottom of its protruding position, to slide in the cavity opened in the rotating plate 409. The rotating plate 409 is rotatably connected to the inside of the main body 1 through a connecting shaft, so that the first connecting rod 403 drives the rotating plate 409 to rotate. When the rotating plate 409 rotates, it drives the second connecting rod 408 to move through the cavity opened in it. The bottom end of 08 is fixedly connected to the protruding position of the second moving frame 407, so that the second moving frame 407 is moved by the second connecting rod 408, so that the first moving frame 402 and the second moving frame 407 move towards each other (at this time, the first spring 405 between the first fixed plate 404 and the second fixed plate 406 is in a compressed state. When the moving frame 401 is reset, the elastic potential energy of the first spring 405 is released, which drives the second moving frame 407 to reset). Thus, the two moving rods 410 fixed at the bottom ends of the first moving frame 402 and the second moving frame 407 move synchronously. Since the moving rods 410 are fixedly connected to the friction plates 5, the two friction plates 5 move towards the brake disc 3. As the friction pad 5 moves, it synchronously drives the connecting plate 6 to move, causing the friction rod 8, which is slidably connected inside the plate 6, to move towards the brake disc 3. When the friction rod 8 contacts the surface of the brake disc 3, the multiple friction rods 8 arranged at equal intervals apply point friction braking to the brake disc 3. As the friction pad 5 continues to move, the friction rod 8 moves into the fixing ring 7 fixed to one side of the connecting plate 6. At this time, the friction rod 8 moves into the sliding post 905 within the limiting ring 901. When the friction rod 8 moves, it drives the "Z"-shaped push block 903, which is slidably connected inside the plate 6, to move (at this time, the "Z"-shaped push block 903 slides within the cavity opened between the limiting ring 901 and the friction rod 8). And because the contact surface between the push block 903 and the fixing block 902 is inclined, The moving push block 903 drives the fixed block 902 to move towards the connecting plate 6, which in turn drives the sliding column 905, which is fixedly connected to the fixed block 902, to move towards the connecting plate 6. (When the friction rod 8 and the sliding column 905 move towards each other, the second spring 904 between them is compressed. When the friction plate 5 is reset, the friction rod 8 and the sliding column 905 are reset by releasing their elastic potential energy through the second spring 904.) This achieves the effect of the friction rod 8 retracting into the fixed ring 7 as the friction plate 5 moves, so that the friction plate 5 contacts the brake disc 3 to perform surface friction braking. The transition from point friction to surface friction achieves the effect of gradual braking, avoiding problems such as mechanical impact damage, precision failure, and thermal runaway caused by rigid emergency braking. When the sliding column 905 moves, it drives the connecting frame 10 fixed at its bottom to move synchronously. The movement of the connecting frame 10 drives the connecting block 111 fixed at its bottom to move. Since the contact surface between the connecting block 111 and the lifting block 112 is inclined, when the connecting block 111 moves horizontally, it drives the lifting block 112 to move vertically within the base 116. The lifting block 112 is fixedly connected to the sliding block 114, so that the sliding block 114 moves synchronously within the base 116. Since the sliding block 114 has a limiting groove 115, when the sliding block 114 moves, it drives the fixed rod 113 to move horizontally through the limiting groove 115. The fixed rod 113 is fixedly connected to the locking column 12, so that the locking column 12 moves towards the friction plate 5 and abuts against the friction plate 5. The stability of static locking is improved by mechanical self-locking.
[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A linear motor actuator, comprising a main body (1), characterized in that: A linear motor (2) is provided on one side of the main body (1). A brake disc (3) is provided inside the main body (1). Braking components are provided on both sides of the brake disc (3). A friction pad (5) is fixed on one side of the braking component. The friction pad (5) is driven by the braking component to stop the running brake disc (3). Multiple connecting plates (6) are provided at equal intervals inside the friction pad (5). A fixing ring (7) is fixed on one side of the connecting plate (6). The fixing ring (7) passes through the friction pad (5). An adjusting component is provided inside the fixing ring (7). A friction rod (8) is slidably connected inside the friction pad (5). The friction rod (8) is driven by the adjusting component to stop the running brake disc (3). A connecting frame (10) is provided on one side of the friction pad (5). A locking component is provided at the bottom of the connecting frame (10). A locking pin (12) is provided on one side of the locking component. The locking pin (12) is driven by the locking component to lock the stopped brake disc (3).
2. The linear motor actuator according to claim 1, characterized in that: The braking assembly includes a movable frame (401) disposed on one side of the linear motor (2), a first movable frame (402) fixed on the other side of the movable frame (401), a first fixed plate (404) fixed at the bottom of the first movable frame (402), a second fixed plate (406) disposed on one side of the first fixed plate (404), a second movable frame (407) fixed at the bottom of the second fixed plate (406), a rotating plate (409) disposed between the first movable frame (402) and the second movable frame (407), the rotating plate (409) being rotatably connected to the inner wall of the main body (1) via a connecting shaft, a movable rod (410) fixed at the bottom of both the first movable frame (402) and the second movable frame (407), and the other end of the movable rod (410) being fixedly connected to the friction plate (5).
3. The linear motor actuator according to claim 2, characterized in that: A first spring (405) is provided between the first fixing plate (404) and the second fixing plate (406). One end of the first spring (405) is fixedly connected to one side of the first fixing plate (404), and the other end of the first spring (405) is fixedly connected to the second fixing plate (406).
4. A linear motor actuator according to claim 2, characterized in that: The first moving frame (402) has a first connecting rod (403) fixed at the bottom of its protruding position, and the second moving frame (407) has a second connecting rod (408) fixed at the top of its protruding position. The first connecting rod (403) and the second connecting rod (408) are slidably connected to the rotating plate (409), and the rotating plate (409) has a cavity that cooperates with the first connecting rod (403) and the second connecting rod (408).
5. A linear motor actuator according to claim 1, characterized in that: The adjustment assembly includes a limiting ring (901) fixed on one side of the connecting plate (6). The limiting ring (901) is slidably connected to the friction rod (8), and the limiting ring (901) has a cavity that cooperates with the sliding of the friction rod (8). A sliding column (905) is slidably connected inside the fixing ring (7). Fixing blocks (902) are symmetrically fixed on the inner wall of the sliding column (905). A push block (903) is provided between the two fixing blocks (902), and the push block (903) is in the shape of a "Z".
6. A linear motor actuator according to claim 5, characterized in that: The fixed block (902) and the push block (903) are slidably connected. The contact surfaces of the fixed block (902) and the push block (903) are both inclined surfaces. The push block (903) passes through the limiting ring (901) and the friction rod (8). The limiting ring (901) and the friction rod (8) have cavities that cooperate with the push block (903).
7. A linear motor actuator according to claim 5, characterized in that: A second spring (904) is provided inside the sliding column (905). One end of the second spring (904) is fixedly connected to the inner wall of the cavity of the sliding column (905), and the other end of the second spring (904) is fixedly connected to one end of the friction rod (8).
8. A linear motor actuator according to claim 1, characterized in that: The locking assembly includes a connecting block (111) fixed to the bottom of the connecting frame (10), a lifting block (112) slidably connected to the bottom of the connecting block (111), a sliding block (114) fixed to the bottom of the lifting block (112), the sliding block (114) slidably connected to the locking post (12), and a cavity is provided in the sliding block (114) to cooperate with the sliding of the locking post (12). A base (116) is provided outside the sliding block (114), and a cavity is provided in the base (116) to cooperate with the movement of the sliding block (114), the locking post (12) and the lifting block (112).
9. A linear motor actuator according to claim 8, characterized in that: The sliding block (114) is slidably connected to a fixed rod (113), the fixed rod (113) is fixedly connected to a locking post (12), and the sliding block (114) is provided with a limiting groove (115) that cooperates with the fixed rod (113).
10. A linear motor actuation method, applicable to the linear motor actuation mechanism according to any one of claims 1-9, the method comprising the following steps: S1: Braking trigger: When braking is required, such as when the driver steps on the brake or the system triggers a deceleration signal, the braking system first starts the linear motor (2) so that the braking force is initially transmitted to the moving frame (401), and the moving frame (401) moves towards the brake disc (3); S2: Pliers floating: The first moving frame (402) and the second moving frame (407) are driven to move towards each other by the moving frame (401), so that the two friction plates (5) move towards the brake disc (3) until the friction rod (8) set on one side of the friction plate (5) contacts the surface of the brake disc (3); S3: Initial clamping braking: When the friction rod (8) contacts the brake disc (3), the friction rods (8) on both sides form a symmetrical clamping force on the brake disc (3). The intense friction between the friction rod (8) and the brake disc (3) converts the rotational kinetic energy of the brake disc into heat energy. S4: Final clamping brake: After the friction rod (8) contacts the brake disc (3), the friction pad (5) continues to move towards the brake disc (3), and the friction rod (8) gradually retracts into the friction pad (5) until the friction pad (5) is tightly attached to the surface of the brake disc (3). The braking torque of the brake disc (3) is transmitted to the ground through the shaft, and the wheels are finally decelerated until they stop. S5: Brake release: When the braking demand is released, such as when the brake is released or the deceleration signal is stopped, the system starts brake reset. The friction pad (5) and friction rod (8) are disengaged from the brake disc (3) along with the first moving frame (402) and the second moving frame (407). The brake disc (3) resumes free rotation, and the braking process is completely over.