Lead screw elevator with emergency shutdown protection device

Abstract

The utility model relates to the related technical field of lead screw lifters, in particular to a lead screw lifter with an emergency shutdown protection device, which comprises a shell, and an emergency stop mechanism is arranged in the protection shell. According to the lead screw elevator with the emergency shutdown protection device, through the arrangement of the emergency stop mechanism, when the lead screw elevator is used and a motor drives a trapezoidal lead screw to horizontally move, firstly, the trapezoidal lead screw drives a pressing plate to move, at the moment, under limiting of an embedding groove, the pressing plate horizontally moves along the embedding groove, and when the trapezoidal lead screw moves to a certain position, the pressing plate is driven to move; a pressing plate continuously extrudes a connecting block, then the connecting block is stressed to drive the pressing block to move, meanwhile, the connecting block continuously extrudes a second spring in a fixed shell until the pressing block touches a switch button, the switch button emergently controls a stop motor, at the moment, a trapezoidal screw rod stops rotating, and the bottom end of the trapezoidal screw rod is effectively prevented from falling off; therefore, safe operation of equipment is effectively ensured, and accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of screw jacks, in particular to a screw jack with an emergency stop protection device. Background Technique

[0002] A screw jack, also known as a screw drive mechanism, is mainly used to convert rotational motion into linear motion or vice versa. Screw jacks are divided into sliding friction mechanisms and rolling friction mechanisms. The sliding screw nut mechanism has a simple structure, is convenient to process, has a low manufacturing cost, and has a self-locking function. However, it has a large frictional resistance moment and low transmission efficiency. Although the ball screw nut mechanism has a complex structure, a high manufacturing cost, and no self-locking function, its great advantages are small frictional resistance moment, high transmission efficiency, high precision, good system stiffness, reversible motion, and long service life. Therefore, there is a particular need for a screw jack with an emergency stop protection device.

[0003] However, for existing screw jacks, when preventing the screw from coming off, generally a bushing or snap ring is used at the bottom end of the screw to achieve the anti-disengagement of the bottom end of the screw. However, at this time, the motor is still in a state of driving the screw to move, which easily causes the bushing or snap ring to get stuck in the turbine. Content of the Utility Model

[0004] The purpose of the utility model is to provide a screw jack with an emergency stop protection device to solve the problem that in the existing screw jack, when preventing the screw from coming off, generally a bushing or snap ring is used at the bottom end of the screw to achieve the anti-disengagement of the bottom end of the screw. However, at this time, the motor is still in a state of driving the screw to move, which easily causes the bushing or snap ring to get stuck in the turbine as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A screw jack with an emergency stop protection device, including a housing, one side of the surface of the housing is connected with a protective shell, one side of the surface of the housing is provided with an oil replenishing mechanism, one side of the surface of the housing is installed with a motor, a trapezoidal screw is connected through the surface of the housing, an emergency stop mechanism is arranged inside the protective shell, and one end of the motor is connected with a worm;

[0006] The emergency stop mechanism includes an embedded groove, a fixed shell, a pressing plate, a switch button, a second spring, a connecting block and a pressing block. An embedded groove is opened inside the protective shell, a fixed shell is connected inside the protective shell, one end of the trapezoidal screw is connected through the pressing plate, the switch button is embedded inside the fixed shell, the second spring is embedded inside the fixed shell, one end of the second spring is connected with the connecting block, and one side of the surface of the connecting block is connected with the pressing block.

[0007] Preferably, one end of the pressing plate is embedded inside the embedded groove, and the switch button is electrically connected with the motor.

[0008] Preferably, the pressing block is horizontally aligned with the switch button, the pressing block is fitted inside the fixed housing, and one end of the connecting block is fitted inside the fixed housing.

[0009] Preferably, the oil replenishing mechanism includes a dust-proof plate, a sliding groove, a limiting groove, a first spring, an oil injection port, an empty groove, a pushing block, and a sealing plate. One side of the surface of the housing is fitted with a dust-proof plate, one side of the surface of the housing is provided with a sliding groove, one side of the surface of the housing is provided with a limiting groove, the inside of the housing is fitted with a first spring, one side of the surface of the housing is provided with an oil injection port, one side of the surface of the housing is provided with an empty groove, one end of the first spring is connected to a pushing block, and one side of the surface of the pushing block is connected to a sealing plate.

[0010] Preferably, the first spring is fitted inside the limiting groove, and one end of the pushing block is fitted inside the limiting groove.

[0011] Preferably, one end of the sealing plate is fitted inside the empty groove, and one side of the surface of the dust-proof plate is fitted inside the sliding groove.

[0012] Compared with the prior art, the beneficial effect of the present utility model is that: for the screw jack with an emergency shutdown protection device, by connecting a pressing plate to one end of the trapezoidal screw, after the trapezoidal screw moves to a certain position, the pressing plate will press the connecting block, and then the connecting block drives the pressing block to touch the switch button, thereby controlling the motor to shut down emergently through the switch button, so as to protect the screw jack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic cross-sectional external structure diagram of the present utility model;

[0014] Figure 2 is a schematic exploded cross-sectional structure diagram of the emergency stop mechanism of the present utility model;

[0015] Figure 3 is a schematic exploded structure diagram of the oil replenishing mechanism of the present utility model;

[0016] Figure 4 is the present utility model Figure 2 the enlarged structure diagram at A in;

[0017] Figure 5 is the present utility model Figure 3 the enlarged structure diagram at B in.

[0018] In the figure: 1. Housing; 2. Protective shell; 3. Oil replenishing mechanism; 301. Dust-proof plate; 302. Slide groove; 303. Limit groove; 304. First spring; 305. Oil injection port; 306. Empty groove; 307. Pusher block; 308. Sealing plate; 4. Motor; 5. Trapezoidal lead screw; 6. Emergency stop mechanism; 601. Embedded groove; 602. Fixed housing; 603. Pressing plate; 604. Switch button; 605. Second spring; 606. Connecting block; 607. Pressing block; 7. Worm Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-5 , the present invention provides a technical solution: a lead screw lift with an emergency stop protection device, including a housing 1, a protective shell 2 is connected to one side of the surface of the housing 1, an oil replenishing mechanism 3 is arranged on one side of the surface of the housing 1, a motor 4 is installed on one side of the surface of the housing 1, a trapezoidal lead screw 5 penetrates and is connected to the surface of the housing 1, an emergency stop mechanism 6 is arranged inside the protective shell 2, and a worm 7 is connected to one end of the motor 4;

[0021] The emergency stop mechanism 6 includes an embedded groove 601, a fixed housing 602, a pressing plate 603, a switch button 604, a second spring 605, a connecting block 606 and a pressing block 607. An embedded groove 601 is opened on the inner side of the protective shell 2, a fixed housing 602 is connected to the inner side of the protective shell 2, one end of the trapezoidal lead screw 5 penetrates and is connected to the pressing plate 603, the switch button 604 is embedded inside the fixed housing 602, the second spring 605 is embedded inside the fixed housing 602, one end of the second spring 605 is connected to the connecting block 606, and a pressing block 607 is connected to one side of the surface of the connecting block 606. When using the lead screw lift, when the motor 4 drives the trapezoidal lead screw 5 to move horizontally, first, the trapezoidal lead screw 5 will drive the pressing plate 603 to move. At this time, under the limitation of the embedded groove 601, the pressing plate 603 moves horizontally along the embedded groove 601. When the trapezoidal lead screw 5 moves to a certain position, the pressing plate 603 will continuously squeeze the connecting block 606, and then the connecting block 606 will drive the pressing block 607 to move under force. At the same time, the connecting block 606 continuously squeezes the second spring 605 inside the fixed housing 602 until the pressing block 607 touches the switch button 604, and the switch button 604 urgently controls the motor 4 to stop. At this time, the trapezoidal lead screw 5 stops rotating, effectively preventing the anti-loosening at the bottom of the trapezoidal lead screw 5, thereby effectively ensuring the safe operation of the equipment and avoiding accidents.

[0022] Further, one end of the pressing plate 603 is fitted inside the fitting groove 601, and the switch button 604 is electrically connected to the motor 4. Through the setting of the switch button 604, during use, when the switch button 604 is touched by the pressing block 607, a signal is sent to emergently control the motor 4 to stop running, so that the trapezoidal lead screw 5 stops moving, realizing the emergency stop function.

[0023] Further, the pressing block 607 is horizontally aligned with the switch button 604. The pressing block 607 is fitted inside the fixed housing 602, and one end of the connecting block 606 is fitted inside the fixed housing 602. Through the setting of the pressing block 607, during use, the pressing block 607 is used to touch the switch button 604 to activate the emergency stop function.

[0024] Further, the oil replenishing mechanism 3 includes a dust-proof plate 301, a sliding groove 302, a limiting groove 303, a first spring 304, an oil injection port 305, an empty groove 306, a pushing block 307, and a sealing plate 308. A dust-proof plate 301 is fitted on one side of the surface of the housing 1, a sliding groove 302 is provided on one side of the surface of the housing 1, a limiting groove 303 is provided on one side of the surface of the housing 1, a first spring 304 is fitted inside the housing 1, an oil injection port 305 is provided on one side of the surface of the housing 1, an empty groove 306 is provided on one side of the surface of the housing 1, one end of the first spring 304 is connected to a pushing block 307, and one side of the surface of the pushing block 307 is connected to a sealing plate 308. Through the settings of the dust-proof plate 301, the sliding groove 302, the limiting groove 303, the first spring 304, the oil injection port 305, the empty groove 306, the pushing block 307, and the sealing plate 308, during use, first, the user pushes the dust-proof plate 301, then the dust-proof plate 301 moves along the sliding groove 302. After completely pushing open the dust-proof plate 301, the pushing block 307 is pushed. Subsequently, the pushing block 307 moves and compresses the first spring 304 inside the limiting groove 303, and the first spring 304 deforms under the force. At the same time, the pushing block 307 drives the sealing plate 308 to move along the empty groove 306. As the sealing plate 308 moves, the oil injection port 305 is opened accordingly, and lubricating oil can be injected into the housing 1 through the oil injection port 305. After the oil injection is completed, the pushing block 307 is released. At this time, under the action of the first spring 304, the sealing plate 308 resets, closing the oil injection port 305. The operation is simple and more convenient to use.

[0025] Further, the first spring 304 is fitted inside the limiting groove 303, and one end of the pushing block 307 is fitted inside the limiting groove 303. Through the setting of the pushing block 307, during use, the pushing block 307 can transmit the external force to the sealing plate 308 and the first spring 304, facilitating the user to control the movement of the sealing plate 308 to open or close the oil injection port 305.

[0026] Further, one end of the sealing plate 308 is fitted inside the empty slot 306, and one side of the surface of the dust-proof plate 301 is fitted inside the sliding slot 302. Through the settings of the dust-proof plate 301 and the sealing plate 308, during use, the dust-proof plate 301 is used to block dust and other impurities from entering the area of the oil filling port 305, keep the oil filling environment clean, and prevent the lubricating oil from being contaminated and affecting the operation of the elevator. The sealing plate 308 is used to seal the oil filling port 305 when closed to prevent the lubricating oil from leaking, and allow the lubricating oil to be injected into the housing 1 when opened, so as to realize the lubrication and maintenance of the elevator.

[0027] Working principle: First, the user pushes the dust-proof plate 301, then the dust-proof plate 301 moves along the sliding slot 302. After completely pushing open the dust-proof plate 301, the push block 307 is pushed. Subsequently, the push block 307 moves and squeezes the first spring 304 inside the limit slot 303. The first spring 304 deforms under the force. At the same time, the push block 307 drives the sealing plate 308 to move along the empty slot 306. As the sealing plate 308 moves, the oil filling port 305 is opened accordingly, and the lubricating oil can be injected into the housing 1 through the oil filling port 305. After the oil filling is completed, the push block 307 is released. At this time, under the action of the first spring 304, the sealing plate 308 resets, closing the oil filling port 305. The operation is simple and more convenient to use. After that, when using the screw elevator, when the motor 4 drives the trapezoidal screw rod 5 to move horizontally, first, the trapezoidal screw rod 5 drives the pressing plate 603 to move. At this time, under the limitation of the embedding groove 601, the pressing plate 603 moves horizontally along the embedding groove 601. When the trapezoidal screw rod 5 moves to a certain position, the pressing plate 603 continuously squeezes the connecting block 606. Then the connecting block 606 drives the pressing block 607 to move under the force, and at the same time, the connecting block 606 continuously squeezes the second spring 605 inside the fixed shell 602 until the pressing block 607 touches the switch button 604. At this time, the switch button 604 urgently controls the motor 4 to stop, and at this time, the trapezoidal screw rod 5 stops rotating, effectively preventing the anti-drop at the bottom end of the trapezoidal screw rod 5, thereby effectively ensuring the safe operation of the equipment and avoiding accidents.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screw lift with an emergency stop protection device, comprising a housing (1), characterized in that: A protective shell (2) is connected to one side of the surface of the shell (1), an oil replenishing mechanism (3) is provided on one side of the surface of the shell (1), a motor (4) is installed on one side of the surface of the shell (1), a trapezoidal lead screw (5) is connected through the surface of the shell (1), an emergency stop mechanism (6) is provided inside the protective shell (2), and one end of the motor (4) is connected to a worm (7); The emergency stop mechanism (6) comprises an embedding groove (601), a fixed shell (602), a pressure plate (603), a switch button (604), a second spring (605), a connecting block (606) and a pressing block (607); an embedding groove (601) is provided on the inner side of the protective shell (2); the inner side of the protective shell (2) is connected to the fixed shell (602); one end of the trapezoidal screw rod (5) is connected to the pressure plate (603); the interior of the fixed shell (602) is embedded with a switch button (604); the interior of the fixed shell (602) is embedded with a second spring (605); one end of the second spring (605) is connected to the connecting block (606); and one side of the surface of the connecting block (606) is connected to the pressing block (607).

2. The screw lift with emergency stop protection device according to claim 1, characterized in that: One end of the pressing plate (603) is embedded in the embedding groove (601), and the switch button (604) is electrically connected to the motor (4).

3. The screw lift with emergency stop protection device according to claim 1, characterized in that: The pressing block (607) is horizontally aligned with the switch button (604), the pressing block (607) is embedded in the interior of the fixed shell (602), and one end of the connecting block (606) is embedded in the interior of the fixed shell (602).

4. The screw lift with emergency stop protection device according to claim 1, characterized in that: The oil replenishing mechanism (3) comprises a dustproof plate (301), a slide groove (302), a limiting groove (303), a first spring (304), an oil filling port (305), an empty groove (306), a push block (307) and a sealing plate (308); a dustproof plate (301) is embedded on one side of the surface of the shell (1); a slide groove (302) is provided on one side of the surface of the shell (1); a limiting groove (303) is provided on one side of the surface of the shell (1); a first spring (304) is embedded inside the shell (1); an oil filling port (305) is provided on one side of the surface of the shell (1); an empty groove (306) is provided on one side of the surface of the shell (1); one end of the first spring (304) is connected to a push block (307); and one side of the surface of the push block (307) is connected to a sealing plate (308).

5. The screw lift with emergency stop protection device according to claim 4, characterized in that: The first spring (304) is embedded in the limiting groove (303), and one end of the pushing block (307) is embedded in the limiting groove (303).

6. The screw lift with emergency stop protection device according to claim 4, characterized in that: One end of the sealing plate (308) is embedded in the interior of the empty groove (306), and one side of the surface of the dustproof plate (301) is embedded in the interior of the sliding groove (302).

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