Thrust linear displacement actuator

Abstract

The utility model relates to the technical field of actuators, in particular to a thrust linear displacement actuator which comprises a shell and a limiting mechanism. A first cavity and a second cavity are formed in the shell, a moving rod moving horizontally is arranged in the first cavity, and a connecting base is arranged at the end of the moving rod; the limiting mechanism comprises a connecting plate arranged on the connecting seat, a positioning piece arranged on the connecting plate, a first position detector and a second position detector which are arranged in the first cavity, a second guide rail horizontally arranged in the first cavity, a moving seat arranged on the second guide rail in a sliding manner, and a positioning assembly arranged on the moving seat; and the second position detector is arranged on the movable seat. The actuator solves the problem that the practicability of the actuator is reduced due to the fact that the actuator cannot accurately control the moving distance of the sliding rod.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a thrust linear displacement actuator. Background Art

[0002] Thrust linear displacement actuators are devices that can convert input power into linear motion and force. They are widely used in various industrial automation systems to control the position, speed and force of objects.

[0003] Chinese patent announcement number CN213661354U discloses a dry-wet separation linear motion actuator, including an actuator body, the actuator body including a slide rod assembly and a driving mechanism, the actuator body is provided with a sealed chamber and a semi-open chamber, the driving mechanism is arranged in the sealed chamber, the slide rod assembly is arranged in the semi-open chamber, the slide rod assembly includes a transmission rod and a driving slide rod threadedly connected to the transmission rod, one end of the transmission rod is connected to the driving mechanism, the driving mechanism is used to drive the transmission rod to rotate, the driving slide rod is sleeved on the outside of the transmission rod, and an elastic element is arranged on the driving slide rod. The actuator improves the sealing performance and service life of the driving mechanism by arranging the driving mechanism in a separate sealed chamber, and eliminates the impact noise when the actuator body moves by setting the elastic element.

[0004] However, the above technical solution has the following shortcomings: the distance that the actuator drives the slide bar to move is generally set to the maximum stroke, or the start and stop of the motor are controlled by the user's feeling to realize the movement and stop of the slide bar. The distance of movement of the slide bar cannot be accurately controlled, which reduces the practicality of the actuator. Utility Model Content

[0005] The utility model aims to solve the problem of the practicality of the actuator caused by the inability of the actuator to accurately control the moving distance of the slide rod, thereby proposing a thrust linear displacement actuator in view of the problems existing in the background technology.

[0006] The technical solution of the utility model is a thrust linear displacement actuator, comprising a shell and a limiting mechanism; a first cavity and a second cavity are arranged inside the shell, a horizontally movable moving rod is arranged inside the first cavity, and a connecting seat is arranged at the end of the moving rod; the limiting mechanism comprises a connecting plate arranged on the connecting seat, a positioning member arranged on the connecting plate, a first position detector and a second position detector arranged in the first cavity, a second guide rail horizontally arranged in the first cavity, a moving seat slidably arranged on the second guide rail, and a positioning assembly arranged on the moving seat, and the second position detector is arranged on the moving seat.

[0007] Preferably, a driving mechanism is arranged in the second cavity, and the driving mechanism includes a motor, a main shaft connected to the motor, a first gear coaxially arranged on the main shaft, a threaded rod horizontally arranged inside the shell and rotatably connected to the shell, and a second gear coaxially arranged on the threaded rod, the first gear is meshed with the second gear, the threaded rod is threadedly connected to the moving rod, and the moving rod is slidably connected to the shell.

[0008] Preferably, a first guide rail in a horizontal direction is arranged inside the first cavity, the connecting seat is slidably connected to the first guide rail, and a ventilation hole is arranged on the second cavity.

[0009] Preferably, a first stabilizing frame is provided inside the shell, the movable rod is slidably connected to the first stabilizing frame, two second stabilizing frames distributed front and back are provided inside the shell, and the threaded rod is rotatably connected to the second stabilizing frames.

[0010] Preferably, a fixing seat is arranged inside the first cavity, and the first position detector is arranged on the fixing seat.

[0011] Preferably, the positioning assembly includes a pressing block, a threaded cylinder arranged on the pressing block, two sliders symmetrically distributed on the pressing block, a connecting frame arranged on the movable seat and a rotating shaft rotatably arranged on the connecting frame, the rotating shaft is threadedly connected to the threaded cylinder, the connecting frame is slidably connected to the shell, two horizontally distributed sliding grooves are arranged on the connecting frame, the sliders are slidably arranged inside the sliding grooves, and an anti-slip pad is arranged on the pressing block.

[0012] Preferably, a clamping ring and a knob are coaxially arranged on the rotating shaft, and the clamping ring is rotatably connected to the connecting frame.

[0013] Preferably, the positioning group further comprises a scale plate arranged on the housing, and the pressing block faces the scale plate.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] 1. The utility model can pre-adjust the position of the second position detector through the setting of the limit mechanism. When the positioning member moves to the second position detector, the motor can be controlled to stop forward rotation, thereby realizing accurate control of the extension distance of the moving rod; when the positioning member returns to the first position detector, the motor can be controlled to stop reverse rotation. At this time, the moving rod is located at the initial position, which plays the role of position zeroing and avoids damage to the actuator parts caused by stopping the motor by feeling.

[0016] 2. The utility model can quickly determine the position of the second position detector by means of the positioning component, and is simple to operate and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the shell;

[0019] Figure 3 It is a schematic diagram of the connection between the moving rod and the threaded rod;

[0020] Figure 4 It is a structural diagram of the positioning component.

[0021] Figure numerals: 1. shell; 2. moving rod; 3. connecting seat; 4. motor; 5. main shaft; 6. first gear; 7. threaded rod; 8. second gear; 9. first guide rail; 10. connecting plate; 11. positioning member; 12. first position detector; 13. second position detector; 14. fixed seat; 15. moving seat; 16. second guide rail; 17. connecting frame; 18. rotating shaft; 19. retaining ring; 20. knob; 21. pressure block; 22. threaded cylinder; 23. slider; 24. anti-slip pad; 25. dial; 26. ventilation hole; 27. first stabilizing frame; 28. second stabilizing frame. DETAILED DESCRIPTION

[0022] Embodiment 1

[0023] like Figure 1-Figure 4 As shown, a thrust linear displacement actuator proposed in this embodiment includes a shell 1 and a limiting mechanism; a first cavity and a second cavity are arranged inside the shell 1, a horizontally movable moving rod 2 is arranged inside the first cavity, and a connecting seat 3 is arranged at the end of the moving rod 2.

[0024] The limiting mechanism includes a connecting plate 10 arranged on the connecting seat 3, a positioning member 11 arranged on the connecting plate 10, a first position detector 12 and a second position detector 13 arranged in the first cavity, a second guide rail 16 arranged horizontally in the first cavity, a moving seat 15 slidably arranged on the second guide rail 16, and a positioning assembly arranged on the moving seat 15, the second position detector 13 is arranged on the moving seat 15, a fixed seat 14 is arranged inside the first cavity, and the first position detector 12 is arranged on the fixed seat 14. The first position detector 12 controls the reverse movement of the moving rod 2, and when the distance that the moving rod 2 extends out of the housing 1 is the shortest, the positioning member 11 is located at the first position detector 12, that is, the initial position before each movement of the moving rod 2, and the reverse movement of the moving rod 2 is limited.

[0025] The positioning assembly includes a pressure block 21, a threaded barrel 22 arranged on the pressure block 21, two sliders 23 symmetrically distributed on the pressure block 21, a connecting frame 17 arranged on the movable seat 15, and a rotating shaft 18 rotatably arranged on the connecting frame 17. The rotating shaft 18 is threadedly connected to the threaded barrel 22, the connecting frame 17 is slidably connected to the shell 1, two horizontally distributed sliding grooves are arranged on the connecting frame 17, the slider 23 is slidably arranged inside the sliding grooves, and an anti-slip pad 24 is arranged on the pressure block 21. The positioning group also includes a dial 25 arranged on the shell 1, the pressure block 21 is opposite to the dial 25, the rotating shaft 18 is coaxially provided with a snap ring 19 and a knob 20, and the snap ring 19 is rotatably connected to the connecting frame 17.

[0026] In this embodiment, when the actuator is used to push an object to perform a linear displacement, the position of the second position detector 13 on the second guide rail 16 can be adjusted according to the required displacement distance, and the distance between the first position detector 12 and the second position detector 13 can be used to accurately control the object's moving distance, avoiding judgment by the naked eye, and also requiring the use of other auxiliary tools to control the distance. When the position of the second position detector 13 needs to be adjusted, first hold the knob 20 to rotate the shaft 18 in the opposite direction, and the shaft 18 is screwed with the threaded barrel 22. Under the action of the slider 23 and the slide groove, the threaded barrel 22 drives the pressure block 21 to move along the axial direction of the shaft 18 and the pressure block 21 is away from the housing 1, and then the connecting frame 17 is slid according to the displacement distance. The dial 25 can observe the distance moved by the connecting frame 17. When the connecting frame 17 slides to the positioning point, the shaft 18 is rotated forward until the pressure block 21 is pressed tightly against the housing 1, that is, the position of the second position detector 13 is fixed, and the operation is simple and convenient.

[0027] When the moving rod 2 just drives the connecting seat 3 to move, the positioning member 11 leaves the first position detector 12, and the position of the first position detector 12 is aligned with the zero scale line of the dial 25. When the positioning member 11 moves to the second position detector 13, the second position detector 13 sends a signal to the controller (not shown), and the controller sends a signal to control the motor 4 to stop forward rotation. The distance moved by the moving rod 2 is the distance between the first position detector 12 and the second position detector 13, which is the indication of the pressure block 21 pressing on the dial 25, thereby realizing precise control of the moving distance of the object and improving the practicality of the actuator.

[0028] Embodiment 2

[0029] like Figure 2As shown, a thrust linear displacement actuator proposed in this embodiment, compared with embodiment one, in this embodiment, a driving mechanism is arranged in the second cavity, the driving mechanism includes a motor 4, a main shaft 5 drivingly connected to the motor 4, a first gear 6 coaxially arranged on the main shaft 5, a threaded rod 7 horizontally arranged inside the shell 1 and rotatably connected to the shell 1, and a second gear 8 coaxially arranged on the threaded rod 7, the first gear 6 is meshedly connected with the second gear 8, the threaded rod 7 is threadedly connected with the moving rod 2, the moving rod 2 is slidably connected with the shell 1, a first horizontal guide rail 9 is arranged inside the first cavity, the connecting seat 3 is slidably connected with the first guide rail 9, and a ventilation hole 26 is arranged on the second cavity, the ventilation hole 26 is used for heat dissipation of the second cavity to ensure stable operation of the motor 4.

[0030] In this embodiment, the main shaft 5 is driven to rotate by the motor 4, and the main shaft 5 drives the first gear 6 to rotate. The first gear 6 is meshed with the second gear 8 for transmission, and then the second gear 8 drives the threaded rod 7 to rotate. The threaded rod 7 is screwed with the moving rod 2. Under the guidance of the first guide rail 9, the moving rod 2 follows the connecting seat 3 to move horizontally along the axial direction of the first guide rail 9, and then the moving rod 2 pushes the object to perform linear displacement.

[0031] Embodiment 3

[0032] like Figure 2 and Figure 3 As shown, a thrust linear displacement actuator proposed in this embodiment, compared with the first embodiment, in this embodiment, a first stabilizing frame 27 is provided inside the housing 1, the moving rod 2 is slidably connected to the first stabilizing frame 27, two second stabilizing frames 28 distributed front and back are provided inside the housing 1, and the threaded rod 7 is rotatably connected to the second stabilizing frame 28. In this embodiment, the first stabilizing frame 27 is used to ensure the stability of the movement of the moving rod 2, and the second stabilizing frame 28 is used to support the rotation stability of the threaded rod 7.

[0033] The implementation modes of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A thrust linear displacement actuator, characterized in that: include: A housing (1) is provided with a first cavity and a second cavity inside thereof, a horizontally movable moving rod (2) is provided inside the first cavity, and a connecting seat (3) is provided at the end of the moving rod (2); A limiting mechanism comprises a connecting plate (10) arranged on a connecting seat (3), a positioning member (11) arranged on the connecting plate (10), a first position detector (12) and a second position detector (13) arranged in a first cavity, a second guide rail (16) arranged horizontally in the first cavity, a moving seat (15) slidably arranged on the second guide rail (16), and a positioning assembly arranged on the moving seat (15), wherein the second position detector (13) is arranged on the moving seat (15).

2. A thrust linear displacement actuator according to claim 1, characterized in that: A driving mechanism is arranged in the second cavity, comprising a motor (4), a main shaft (5) drivingly connected to the motor (4), a first gear (6) coaxially arranged on the main shaft (5), a threaded rod (7) horizontally arranged inside the shell (1) and rotatably connected to the shell (1), and a second gear (8) coaxially arranged on the threaded rod (7), the first gear (6) and the second gear (8) being meshingly connected, the threaded rod (7) and the moving rod (2) being threadedly connected, and the moving rod (2) and the shell (1) being slidably connected.

3. The thrust linear displacement actuator according to claim 1, characterized in that: A first guide rail (9) in a horizontal direction is arranged inside the first cavity, the connecting seat (3) is slidably connected to the first guide rail (9), and a ventilation hole (26) is arranged on the second cavity.

4. The thrust linear displacement actuator according to claim 1, characterized in that: A first stabilizing frame (27) is arranged inside the shell (1), the moving rod (2) is slidably connected to the first stabilizing frame (27), two second stabilizing frames (28) distributed front and back are arranged inside the shell (1), and the threaded rod (7) is rotatably connected to the second stabilizing frames (28).

5. The thrust linear displacement actuator according to claim 1, characterized in that: A fixing seat (14) is arranged inside the first cavity, and a first position detector (12) is arranged on the fixing seat (14).

6. The thrust linear displacement actuator according to claim 1, characterized in that: The positioning assembly comprises a pressing block (21), a threaded barrel (22) arranged on the pressing block (21), two sliding blocks (23) symmetrically distributed on the pressing block (21), a connecting frame (17) arranged on the movable seat (15), and a rotating shaft (18) rotatably arranged on the connecting frame (17), wherein the rotating shaft (18) is threadedly connected to the threaded barrel (22), the connecting frame (17) is slidably connected to the housing (1), two horizontally distributed sliding grooves are arranged on the connecting frame (17), the sliding blocks (23) are slidably arranged inside the sliding grooves, and an anti-slip pad (24) is arranged on the pressing block (21).

7. The thrust linear displacement actuator according to claim 6, characterized in that: A clamping ring (19) and a knob (20) are coaxially arranged on the rotating shaft (18), and the clamping ring (19) is rotatably connected to the connecting frame (17).

8. The thrust linear displacement actuator according to claim 6, characterized in that: The positioning group also includes a scale plate (25) arranged on the housing (1), and the pressing block (21) faces the scale plate (25).

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