Clutch type electric push rod returning device

Abstract

The utility model provides a clutch type electric push rod retreating device which comprises a fixed seat, a shell, a power motor, a lead screw, a push rod and a clutch mechanism, the shell is arranged on the fixed seat, the power motor is arranged in the shell and located on the upper side of the fixed seat, the lead screw is rotationally arranged on the side, away from the power motor, of the fixed seat, and the push rod is arranged on the shell. The lead screw is in power connection with the power motor, the outer circle face of the lead screw is sleeved with a lifting base, and the push rod is arranged in the shell in a sliding mode. According to the scheme, the clutch sliding rod drives the connecting tile to be far away from the outer circle face of the lead screw, then supporting force used for balancing counter-acting force on the push rod disappears, rapid rollback after touch is achieved, safety and reliability of equipment are improved, the situation that an electrical rollback mechanism cannot work normally due to circuit faults caused by long-time use is avoided, accurate control is achieved, and the service life of the equipment is prolonged. And the requirements of modern equipment and systems on high precision and high reliability are met.

Description

Technical Field

[0001] The utility model relates to the technical field of electric push rods, in particular to a clutch type electric push rod retracting device. Background Art

[0002] With the advancement of technology, electric linear actuators have become important components in many devices and systems, and are widely used in various industrial automation, medical equipment, home intelligence and other fields.

[0003] However, in practical applications, the extension and retraction functions of electric linear actuators have an important impact on the performance of the equipment and the user experience, but there are certain limitations in practical applications. For example, the electrical retraction device may not work properly due to circuit failure. In addition, these traditional retraction devices often cannot achieve precise control and cannot meet the requirements of modern equipment and systems for high precision and high reliability. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a clutch-type electric push rod retraction device, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a clutch-type electric push rod retraction device, including a fixed seat, a shell, a power motor, a screw, a push rod and a clutch mechanism, the shell is arranged on the fixed seat, the power motor is arranged in the shell and is located on the upper side of the fixed seat, the screw is rotatably arranged on the fixed seat away from the power motor, the screw and the power motor are dynamically connected, the outer cylindrical surface of the screw is sleeved with a lifting seat, the push rod is slidably arranged in the shell, the push rod is sleeved on the outside of the screw rod, the push rod is fixedly arranged on the upper surface of the lifting seat, and the clutch mechanism is arranged in the lifting seat.

[0008] Preferably, a shock absorbing joint is fixedly provided on the upper end surface of the push rod.

[0009] Preferably, at least one set of limit assemblies is provided on the fixed seat, and the limit assemblies include a limit rod and a driven sliding rod. The limit rod is fixed on the fixed seat and passes through the lifting seat. An inner cavity is defined in the limit rod. The driven sliding rod is slidably disposed in the inner cavity. A sealing gasket is fixed at the lower end of the driven sliding rod, and the sealing gasket is used to isolate the space in the inner cavity located on the upper and lower sides of the sealing gasket.

[0010] Preferably, the clutch mechanism includes an electromagnetic component, a clutch slide rod and a connecting shoe. A clutch cavity is symmetrically arranged in the lifting seat. The clutch slide rod is slidably arranged in the clutch cavity. The clutch cavities on both sides are close to each other and a connecting shoe is fixedly arranged on one side. The inner annular surfaces of the two connecting shoes are provided with the same set of threads. The inner annular surfaces of the connecting shoes are meshed with the outer cylindrical surface of the screw rod. The electromagnetic component is arranged in the clutch cavity, and the electromagnetic component is used to control the distance between the two connecting shoes.

[0011] Preferably, the electromagnetic component is an electromagnet, which is fixed on the inner wall of the clutch cavity. The electromagnet has the same magnetic pole as the clutch slide bar, and a reset spring is fixed between the clutch slide bar and the inner wall of the clutch cavity.

[0012] (III) Beneficial effects

[0013] The utility model provides a clutch type electric push rod retraction device. It has the following beneficial effects:

[0014] 1. This solution uses the clutch slide bar to drive the connecting shoe away from the outer cylindrical surface of the screw rod, so that the supporting force of the reaction force on the balancing push rod disappears, and a rapid retreat is achieved after hitting an obstacle, thereby improving the safety and reliability of the equipment, avoiding the long-term use of the electrical retreat mechanism resulting in circuit failure and failure to work normally, achieving precise control, and meeting the requirements of modern equipment and systems for high precision and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A in the middle.

[0018] In the figure: 11, fixed seat; 12, shell; 13, power motor; 14, screw rod; 15, lifting seat; 16, push rod; 17, shock absorbing joint; 18, clutch chamber; 19, clutch slide bar; 20, connecting shoe; 21, electromagnet; 22, return spring; 23, limit rod; 24, inner cavity; 25, driven slide bar; 26, sealing gasket. DETAILED DESCRIPTION

[0019] The utility model provides a clutch type electric push rod retraction device, such as Figure 1-3As shown, it includes a fixed seat 11, a shell 12, a power motor 13, a screw 14, a push rod 16 and a clutch mechanism. The shell 12 is arranged on the fixed seat 11, the power motor 13 is arranged in the shell 12 and is located on the upper side of the fixed seat 11, the screw 14 is rotatably arranged on the fixed seat 11 away from the power motor 13, the screw 14 and the power motor 13 are dynamically connected, the outer cylindrical surface of the screw 14 is sleeved with a lifting seat 15, the push rod 16 is slidably arranged in the shell 12, the push rod 16 is sleeved on the outside of the screw 14, the push rod 16 is fixedly arranged on the upper surface of the lifting seat 15, and the clutch mechanism is arranged in the lifting seat 15.

[0020] A shock absorbing joint 17 is fixedly provided on the upper end surface of the push rod 16 .

[0021] like Figure 2-Figure 3 As shown, at least one set of limiting components is provided on the fixed seat 11, and the limiting components include a limiting rod 23 and a driven sliding rod 25. The limiting rod 23 is fixed on the fixed seat 11 and passes through the lifting seat 15. An inner cavity 24 is opened in the limiting rod 23. The driven sliding rod 25 is slidably provided in the inner cavity 24. A sealing gasket 26 is fixed at the lower end of the driven sliding rod 25. The sealing gasket 26 is used to isolate the space in the inner cavity 24 located on the upper and lower sides of the sealing gasket 26.

[0022] The clutch mechanism includes an electromagnetic component, a clutch slide rod 19 and a connecting shoe 20. A clutch cavity 18 is symmetrically arranged in the lifting seat 15. The clutch slide rod 19 is slidably arranged in the clutch cavity 18. A connecting shoe 20 is fixedly arranged on one side of the clutch cavities 18 on both sides close to each other. The inner annular surfaces of the two connecting shoes 20 are provided with the same set of threads. The inner annular surfaces of the connecting shoes 20 are meshed with the outer cylindrical surface of the screw rod 14. The electromagnetic component is arranged in the clutch cavity 18, and the electromagnetic component is used to control the distance between the two connecting shoes 20.

[0023] The electromagnetic component is an electromagnet 21, which is fixed on the inner wall of the clutch chamber 18. The electromagnet 21 has the same magnetic pole as the clutch slide bar 19. The electromagnet 21 is electrically connected to the obstacle detection unit in the prior art. A reset spring 22 is fixed between the clutch slide bar 19 and the inner wall of the clutch chamber 18.

[0024] The power motor 13 and the electromagnet 21 are powered synchronously. When the power motor 13 is started, the power motor 13 drives the screw rod 14 to rotate through the transmission device. At this time, the electromagnet 21 generates magnetism due to electricity. The electromagnet 21 uses magnetic force to make the clutch slide bars 19 on both sides slide in the direction of approaching each other. At this time, the clutch slide bars 19 on both sides drive the connecting shoe 20 to resist the outer cylindrical surface of the screw rod 14. The screw rod 14 drives the connecting shoe 20 to move axially through the outer cylindrical thread. The connecting shoe 20 is located on the outer cylindrical surface of the limit rod 23 and slides axially while driving the push rod 16 to slide synchronously. The push rod 16 pushes the external component through the shock-absorbing joint 17.

[0025] When retreat is required, the electromagnet 21 is powered off, the reset spring 22 recovers its elastic deformation and pulls the clutch slide bars 19 on both sides, so that the clutch slide bars 19 on both sides move away from each other. At this time, the clutch slide bar 19 drives the connecting shoe 20 away from the outer cylindrical surface of the screw rod 14, thereby causing the supporting force for the reaction force on the balancing push rod 16 to disappear. The reaction force on the upper side of the push rod 16 drives the lifting seat 15 and the driven slide bar 25 to reset. At this time, the pressure in the inner cavity 24 increases, which reduces the rebound speed of the push rod 16, reduces the impact force when the electric push rod is hit, and thus protects the electric push rod.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clutch type electric push rod retraction device, characterized in that: The invention comprises a fixed seat (11), a shell (12), a power motor (13), a screw rod (14), a push rod (16) and a clutch mechanism, wherein the shell (12) is arranged on the fixed seat (11), the power motor (13) is arranged in the shell (12) and is located on the upper side of the fixed seat (11), the screw rod (14) is rotatably arranged on a side of the fixed seat (11) away from the power motor (13), the screw rod (14) and the power motor (13) are connected in power, the outer circumferential surface of the screw rod (14) is sleeved with a lifting seat (15), the push rod (16) is slidably arranged in the shell (12), the push rod (16) is sleeved on the outer side of the screw rod (14), the push rod (16) is fixedly arranged on the upper surface of the lifting seat (15), and the clutch mechanism is arranged in the lifting seat (15).

2. A clutch type electric push rod retraction device according to claim 1, characterized in that: A shock absorbing joint (17) is fixedly provided on the upper end surface of the push rod (16).

3. The clutch type electric push rod retraction device according to claim 1, characterized in that: At least one set of limiting components is provided on the fixed seat (11), and the limiting components include a limiting rod (23) and a driven sliding rod (25). The limiting rod (23) is fixed on the fixed seat (11) and passes through the lifting seat (15). An inner cavity (24) is provided in the limiting rod (23). The driven sliding rod (25) is slidably provided in the inner cavity (24). A sealing gasket (26) is fixed at the lower end of the driven sliding rod (25). The sealing gasket (26) is used to isolate the space in the inner cavity (24) located on the upper and lower sides of the sealing gasket (26).

4. The clutch type electric push rod retraction device according to claim 1, characterized in that: The clutch mechanism comprises an electromagnetic component, a clutch slide bar (19) and a connecting shoe (20). A clutch cavity (18) is symmetrically arranged in the lifting seat (15). The clutch slide bar (19) is slidably arranged in the clutch cavity (18). A connecting shoe (20) is fixedly arranged on one side of the clutch cavities (18) on both sides close to each other. The inner annular surfaces of the two connecting shoes (20) are provided with the same set of threads. The inner annular surfaces of the connecting shoes (20) are meshed with the outer cylindrical surface of the screw rod (14). The electromagnetic component is arranged in the clutch cavity (18) and is used to control the distance between the two connecting shoes (20).

5. The clutch type electric push rod retraction device according to claim 4, characterized in that: The electromagnetic component is an electromagnet (21), which is fixedly arranged on the inner wall of the clutch chamber (18). The electromagnet (21) has the same magnetic pole as the clutch slide bar (19), and a reset spring (22) is fixedly arranged between the clutch slide bar (19) and the inner wall of the clutch chamber (18).

Images