An electric push rod

Abstract

The utility model relates to electric push rod technical field, concretely is a kind of electric push rod, including outer tube, the one end of outer tube is rotatably connected with rotating sleeve, the side of rotating sleeve is embedded with conical disc, the inside sleeve of conical disc is connected with movable rod, the one end of conical disc away from rotating sleeve is provided with connecting frame, the both sides of connecting frame are provided with brake ring around, this electric push rod, by setting the rotating sleeve and conical disc of mutual embedding make inner tube can be telescopic in the inner chamber of outer tube, control the embedding state between conical disc and rotating sleeve to reach the purpose of control power connection and disconnect, relative to the clutch mode of traditional tooth butt joint, can effectively reduce the problem of gear tooth, tooth, let inner tube can be at high speed under the realization of smooth clutch when power access or power disconnect, so that inner tube is more stable when telescoping.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator technology, specifically an electric linear actuator. Background Technology

[0002] An electric linear actuator is an electrically driven device that converts the rotary motion of an electric motor into the linear reciprocating motion of a linear actuator. It can be used as an actuator in various simple or complex processes to achieve remote control, centralized control, or automatic control.

[0003] A patent document with publication number CN206145016U discloses an electric linear actuator, including a motor, a transmission assembly driven by the motor, and a sleeve assembly driven by the transmission assembly. The sleeve assembly includes a main shaft, and a clutch device is provided between the main shaft and the transmission assembly to realize the power connection or disconnection between the main shaft and the transmission assembly. The clutch device includes a ball clutch, which solves the problem of poor smoothness when the electric linear actuator is powered on or off in the prior art, and also has higher transmission efficiency and longer service life.

[0004] However, there are certain drawbacks. Compared with the traditional gear-operated clutch, the ball clutch reduces the problems of tooth knocking and jamming. However, after long-term use, the wear of the balls and the limit groove may still affect the durability and stability of the clutch, which will affect the service life of the electric actuator. At the same time, the complex structure leads to high maintenance costs. Therefore, we propose an electric actuator. Utility Model Content

[0005] One of the technical problems this application aims to solve is that while ball clutches reduce the problems of tooth jamming and sticking compared to traditional gear-operated clutches, the wear of the balls and limit grooves after prolonged use may still affect the durability and stability of the clutch, and thus affect the service life of the electric push rod.

[0006] To solve the above-mentioned technical problems, this application provides an electric push rod, including an outer tube, a rotating sleeve rotatably connected to one end of the outer tube, a conical disc fitted on one side of the rotating sleeve, a movable rod sleeved inside the conical disc, a connecting frame provided at the end of the conical disc away from the rotating sleeve, and brake rings arranged around both sides of the connecting frame.

[0007] In some embodiments, a motor cover is provided at the bottom of one end of the outer tube, a lifting motor is provided inside the motor cover, a worm gear is fixedly connected to the top output end of the lifting motor, a turbine is engaged on the side of the worm gear, side sliding grooves are provided on both sides of the outer tube, and two slots are provided parallel to each other on the top of the outer tube.

[0008] In some embodiments, the rotating sleeve is provided with a rotating shaft at one end of the connection between the inner cavity of the outer tube and the turbine is fixedly connected to the circumferential side of the rotating shaft, and the end of the rotating sleeve that is fitted with the conical disk is recessed inward and has a trapezoidal cross-section.

[0009] In some embodiments, a movable ring extends outward from the side of the conical disc away from the rotating sleeve, and a collar is fixedly connected inside the connecting frame, the connecting frame being snapped onto the side of the conical disc by the collar.

[0010] In some embodiments, the cone disc has a hole in the middle and a positioning groove is evenly distributed around the hole. The surface of the movable rod has a limiting block protruding outward. The positioning groove and the limiting block are interlocked. The movable rod is slidably connected to the middle of the cone disc through the limiting block.

[0011] In some embodiments, one end of the movable rod is fixedly connected to a lead screw, one end of the lead screw is threadedly connected to an inner tube, the inner tube is slidably connected to the inner cavity of the outer tube, and a return spring is sleeved on the outside of the movable rod, one end of the return spring being fixedly connected to a moving ring.

[0012] In some embodiments, the brake ring is sleeved on the outside of the outer tube, and the two ends of the connecting bracket extend outward and are fixedly connected to the inner wall of the brake ring. The outwardly extended portion of the connecting bracket is slidably connected to the inside of the side slide groove.

[0013] In some embodiments, a second movable groove is provided at one top end of the brake ring, and a first movable groove is provided on the side of the brake ring. One end of the first movable groove is connected to the second movable groove. Fixed grooves are provided on both sides of the second movable groove. A Z-shaped pin is movably connected inside the second movable groove. The Z-shaped pin is movably connected to the top of the brake ring through the fixed groove. A telescopic spring is provided at one end of the Z-shaped pin. The bottom of the Z-shaped pin with the telescopic spring protrudes downward and is engaged inside the slot. The top of the telescopic spring is fixedly connected to the top of the first movable groove.

[0014] This utility model has at least the following beneficial effects:

[0015] 1. This utility model enables the inner tube to extend and retract within the inner cavity of the outer tube by setting a rotating sleeve and a conical disc that fit together. By controlling the engagement state between the conical disc and the rotating sleeve, the purpose of controlling the connection and disconnection of power is achieved. Compared with the traditional tooth-connection clutch method, it can effectively reduce the problems of tooth jamming and tooth breakage, and enable the inner tube to achieve smooth engagement and disengagement at high speeds when power is connected or disconnected, making the inner tube more stable when extending and retracting.

[0016] 2. This utility model presses one end of the Z-shaped pin, causing the bottom protrusion of the Z-shaped pin with the telescopic spring to disengage from the inside of the slot, allowing the brake ring to slide left and right on the surface of the outer tube. When the brake ring slides to the right, causing the cone disc to disengage from the inside of the rotating sleeve, the power is disconnected. When the brake ring slides to the left, causing the cone disc to embed into the inside of the rotating sleeve, the power is connected. The structure is simple and the maintenance cost is low. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is a partial structural exploded view of the present invention;

[0020] Figure 4 This is a partial structural cross-sectional view of the present invention;

[0021] Figure 5 This is an exploded view of the overall structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0023] In the diagram: 1. Outer tube; 100. Side sliding groove; 101. Slot; 102. Upper sliding groove; 2. Motor cover; 200. Lifting motor; 3. Turbine; 4. Rotating sleeve; 5. Conical disc; 500. Positioning groove; 501. Moving ring; 6. Brake ring; 600. First movable groove; 601. Fixed groove; 602. Second movable groove; 7. Movable rod; 700. Limiting block; 8. Lead screw; 9. Inner tube; 11. Worm gear; 12. Return spring; 13. Z-pin; 14. Connecting frame; 15. Collar; 16. Telescopic spring; 17. Stop block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1-5This utility model provides a technical solution: an electric push rod, including an outer tube 1, a rotating sleeve 4 rotatably connected to one end of the outer tube 1, a conical disc 5 fitted into one side of the rotating sleeve 4, a movable rod 7 sleeved inside the conical disc 5, a connecting frame 14 provided at the end of the conical disc 5 away from the rotating sleeve 4, and brake rings 6 arranged around both sides of the connecting frame 14. When the conical disc 5 and the rotating sleeve 4 are fitted together, the kinetic energy of the turbine 3 is transmitted to the conical disc 5 through frictional torque. When the rotating sleeve 4 and the conical disc 5 are overloaded, slippage will occur, which plays a safety protection role. The movable rod 7 is used to drive the lead screw 8 provided at one end to rotate, so that the inner tube 9 sleeved outside the lead screw 8 can extend and retract in the inner cavity of the outer tube 1.

[0026] Please see Figure 3-5 A motor cover 2 is provided at the bottom of one end of the outer tube 1. A lifting motor 200 is installed inside the motor cover 2. A worm gear 11 is fixedly connected to the top output end of the lifting motor 200. The lifting motor 200 is used to drive the worm gear 11 to rotate. A turbine 3 is engaged on the side of the worm gear 11. Side sliding grooves 100 are opened on both sides of the outer tube 1. Two slots 101 are opened parallel to each other on the top of the outer tube 1. A rotating shaft is provided at the connection part between the rotating sleeve 4 and the inner cavity of the outer tube 1, and the turbine 3 is fixedly connected to the circumferential side of the rotating shaft. The end of the rotating sleeve 4 that is fitted with the conical disk 5 is concave inward and has a trapezoidal cross-section. The side of the conical disk 5 away from the rotating sleeve 4 is... The outer extension has a movable ring 501, and the inner part of the connecting frame 14 is fixedly connected to a collar 15. The connecting frame 14 is snapped onto the side of the cone disk 5 through the collar 15. The brake ring 6 is sleeved on the outside of the outer tube 1. The two ends of the connecting frame 14 extend outward and are fixedly connected to the inner wall of the brake ring 6. The outward extension of the connecting frame 14 is slidably connected to the inside of the side slide groove 100. The connecting frame 14 inside the brake ring 6 is snapped onto the outside of the movable ring 501 at one end of the cone disk 5 through the collar 15. The purpose of changing the engagement state between the rotating sleeve 4 and the cone disk 5 can be achieved by controlling the position of the brake ring 6 on the surface of the outer tube 1.

[0027] Please see Figure 2-4The cone disc 5 has a hole in the middle and positioning grooves 500 are evenly distributed around the hole. The surface of the movable rod 7 has a limit block 700 protruding outward. The positioning grooves 500 and the limit block 700 are interlocked. The movable rod 7 is slidably connected to the middle of the cone disc 5 through the limit block 700. One end of the movable rod 7 is fixedly connected to a lead screw 8. One end of the lead screw 8 is threadedly connected to an inner tube 9. The inner tube 9 is slidably connected to the inner cavity of the outer tube 1. A return spring 12 is sleeved on the outside of the movable rod 7. One end of the return spring 12 is fixedly connected to the moving ring 501. When the power to the electric push rod needs to be disconnected, the brake ring 6 drives the cone disc 5 to move to the left inside the outer tube 1 through the connecting frame 14, causing the cone disc 5 to disengage from the rotating sleeve 4. At this time, the cone disc 5 slides to the left at one end of the movable rod 7 through the positioning groove 500 to compensate for the distance of movement. When the brake ring 6 drives the cone disc 5 to move to the right inside the outer tube 1 through the connecting frame 14, the power to the electric push rod is reconnected. At this time, the cone disc 5 slides to the right at one end of the movable rod 7 through the positioning groove 500 to compensate for the distance of movement.

[0028] Please see Figure 4-5 The brake ring 6 has a second movable groove 602 at one top end and a first movable groove 600 on its side. One end of the first movable groove 600 is connected to the second movable groove 602. Fixed grooves 601 are provided on both sides of the second movable groove 602. A Z-shaped pin 13 is movably connected inside the second movable groove 602. The Z-shaped pin 13 is movably connected to the top of the brake ring 6 through the fixed grooves 601. A telescopic spring 16 is provided at one end of the Z-shaped pin 13. The bottom of the end of the Z-shaped pin 13 with the telescopic spring 16 protrudes downward and is locked. The top of the telescopic spring 16 is fixedly connected to the top of the first movable groove 600 inside the slot 101. Since the Z-shaped pin 13 is fixed inside the second movable groove 602 through the fixed groove 601, when the Z-shaped pin 13 is pressed, the protruding part of the other end of the Z-shaped pin 13 that is engaged inside the slot 101 will disengage from the inside of the slot 101, allowing the brake ring 6 to slide outside the outer tube 1. The telescopic spring 16 can reset one end of the Z-shaped pin 13 and re-engage it into the slot 101 after the pressing force on the Z-shaped pin 13 is removed.

[0029] Example 2: Please refer to Figure 6 This utility model provides a technical solution: an electric push rod. The difference between this embodiment and embodiment 1 is that an upper sliding groove 102 is provided at the top of the outer tube 1 parallel to the slot 101. A stop block 17 is slidably connected inside the upper sliding groove 102. The stop block 17 is slidably connected inside the upper sliding groove 102 through protrusions on both sides. The top of the stop block 17 abuts against the bottom of the Z-shaped pin 13 to prevent external force from squeezing the Z-shaped pin 13 during normal operation of the electric push rod, which would cause the electric push rod to disconnect the power and improve the safety of the electric push rod during use.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An electric actuator, comprising an outer tube (1), characterized in that: One end of the outer tube (1) is rotatably connected to a rotating sleeve (4), a conical disc (5) is fitted on one side of the rotating sleeve (4), a movable rod (7) is sleeved inside the conical disc (5), a connecting frame (14) is provided at the end of the conical disc (5) away from the rotating sleeve (4), and brake rings (6) are arranged around both sides of the connecting frame (14).

2. The electric linear actuator according to claim 1, characterized in that: A motor cover (2) is provided at the bottom of one end of the outer tube (1). A lifting motor (200) is provided inside the motor cover (2). A worm gear (11) is fixedly connected to the top output end of the lifting motor (200). A turbine (3) is engaged on the side of the worm gear (11). Side sliding grooves (100) are provided on both sides of the outer tube (1). Two slots (101) are opened in parallel on the top of the outer tube (1).

3. An electric linear actuator according to claim 1, characterized in that: The rotating sleeve (4) is connected to the inner cavity of the outer tube (1) at one end with a rotating shaft and the turbine (3) is fixedly connected to the circumferential side of the rotating shaft. The end of the rotating sleeve (4) that is fitted with the cone disk (5) is recessed inward and has a trapezoidal cross-section.

4. An electric linear actuator according to claim 3, characterized in that: A movable ring (501) extends outward from the side of the conical disc (5) away from the rotating sleeve (4). A collar (15) is fixedly connected inside the connecting frame (14). The connecting frame (14) is snapped onto the side of the conical disc (5) by the collar (15).

5. An electric linear actuator according to claim 4, characterized in that: The cone disc (5) has a hole in the middle and a positioning groove (500) is evenly provided around the hole. The surface of the movable rod (7) has a limiting block (700) protruding outward. The positioning groove (500) and the limiting block (700) are interlocked. The movable rod (7) is slidably connected to the middle of the cone disc (5) through the limiting block (700).

6. An electric linear actuator according to claim 5, characterized in that: One end of the movable rod (7) is fixedly connected to a lead screw (8), and one end of the lead screw (8) is connected to an inner tube (9) by a thread. The inner tube (9) is slidably connected in the inner cavity of the outer tube (1). A return spring (12) is sleeved on the outside of the movable rod (7), and one end of the return spring (12) is fixedly connected to the moving ring (501).

7. An electric linear actuator according to claim 4, characterized in that: The brake ring (6) is sleeved on the outside of the outer tube (1). The two ends of the connecting frame (14) extend outward and are fixedly connected to the inner wall of the brake ring (6). The outwardly extended part of the connecting frame (14) is slidably connected to the inside of the side slide groove (100).

8. An electric linear actuator according to claim 7, characterized in that: The brake ring (6) has a second movable groove (602) at one top end and a first movable groove (600) on the side. One end of the first movable groove (600) is connected to the second movable groove (602). Fixed grooves (601) are provided on both sides of the second movable groove (602). A Z-shaped pin (13) is movably connected inside the second movable groove (602). The Z-shaped pin (13) is movably connected to the top of the brake ring (6) through the fixed groove (601). A telescopic spring (16) is provided at one end of the Z-shaped pin (13). The bottom of the Z-shaped pin (13) with the telescopic spring (16) protrudes downward and is engaged inside the slot (101). The top of the telescopic spring (16) is fixedly connected to the top of the first movable groove (600).

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