CN214383641U

CN214383641U - An anti-drop device for a lifting mechanism

Info

Publication number: CN214383641U
Application number: CN202022380860.6U
Authority: CN
Inventors: 简永东; 杨人显
Original assignee: Shenzhen Fudewai Intelligent Technology Co Ltd
Current assignee: Shenzhen Fudewai Intelligent Technology Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-10-12
Anticipated expiration: 2030-10-23

Abstract

The utility model provides an anti-fall device for a lifting mechanism, which comprises a cylinder fixing plate, a vertical plate, a vertical plate, a sliding rail, an air cylinder, a sliding block and a self-locking backing plate; the air cylinder is horizontally arranged and fixed on the air cylinder The fixing plate, the cylinder fixing plate is provided with at least one sliding rail, and the sliding rail is arranged parallel to the cylinder piston rod; Movement direction; an adapter block is fixed on the self-locking pad, and the cylinder piston rod is connected to the adapter block; the cylinder piston rod drives the self-locking pad, and the self-locking pad is moved along the direction defined by the slide rail through the slider Movement; the self-locking backing plate is provided with a notch for accommodating the drive shaft of the lifting mechanism, and the device further includes a control assembly, which controls the air cylinder. By adopting the above structure, the working platform can be effectively prevented from falling and damaging the working platform.

Description

Anti-falling device for lifting mechanism

Technical Field

The utility model relates to an elevating system equipment technical field especially relates to a be used for elevating system dropproof device.

Background

The screw rod (transmission rod) lifting mechanism is widely applied to various industries, and can accurately control the height of the lifting platform according to a certain program, so that the production operation under different heights is met. The screw rod lifting mechanism has multiple advantages such as light weight, long service life, small volume, low noise, flexible and convenient transportation and the like. However, after the screw rod lifting mechanism is used for a long time, on one hand, the nut matched with the screw rod is easy to wear and even break, the screw rod cannot form self-locking with the screw rod nut, the lifting platform fixed with the nut falls, and on the other hand, the transmission screw rod fails, so that the transmission rod drives the working platform to rapidly descend. Therefore, in order to avoid the first situation, a cushion block is directly arranged at the bottom of the lifting mechanism to receive the falling working platform, but if the stroke of the working platform in the vertical direction is too large, the impact force is still large, and the working platform surface is easily damaged. For the second situation, a way of stopping the transmission guide rail is generally adopted, for example, an automatic detection anti-falling safety device disclosed in chinese patent CN202704983U, when the upright guide rail fails, the wedge-shaped block clamps the upright guide rail and the slide rail, so that the upright guide rail is stopped. However, if the lowering of the work platform is due to a break in the drive rod or a failure of the spindle nut, the locking of the drive rod is not effective.

Therefore, there is a need in the art for a fall arrest device that combines the first and second aspects, and that has a stable structure and a good stopping effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the application provides the anti-falling device which is used for the lifting mechanism and has wide application range and good stopping effect. The technical scheme of the application is as follows:

a falling-proof device for a lifting mechanism comprises a cylinder fixing plate, a vertical plate, a guide rail, a cylinder, a sliding block and a self-locking base plate;

the air cylinder is horizontally arranged and fixed on an air cylinder fixing plate, one end of the vertical plate is connected with the air cylinder fixing plate, and the other end of the vertical plate is fixed with the lifting mechanism; at least one sliding rail is arranged on the cylinder fixing plate and is parallel to the cylinder piston rod; the sliding block is matched with the sliding rail and moves relative to the cylinder fixing plate along the sliding rail; the self-locking base plate is arranged parallel to the slide rail, and the cushion block and one side of the slide block, which is far away from the slide rail, are fixedly installed; a transfer block is fixedly arranged on the self-locking base plate, and the piston rod of the air cylinder is connected with the transfer block; the cylinder piston rod drives the self-locking base plate, and the self-locking base plate moves along the direction limited by the slide rail through the slide block; the auto-lock backing plate is for being provided with the breach for hold elevating system's transfer line, the anti-falling device still includes control assembly, and control assembly controls the cylinder.

In the scheme, the anti-falling device is fixed on the lifting mechanism through the vertical plate, when the transmission lead screw stalls, the control assembly is triggered when the working platform is driven to descend downwards, the control assembly controls the air cylinder and drives the transfer block positioned on the self-locking base plate through the air cylinder piston rod, and therefore the self-locking base plate is driven to move in the horizontal direction. Because the self-locking base plate is fixedly connected with the sliding block, the self-locking base plate moves to the lower part of the working platform along the direction limited by the sliding rail, namely the horizontal direction. In addition, in order to avoid interference of the vertically arranged transmission rod in the movement process, the self-locking base plate is provided with a notch for accommodating the transmission rod, and the contact area between the self-locking base plate and the working platform is increased. After the working platform is carried by the self-locking backing plate, the working platform is clamped at the self-locking backing plate because the self-locking backing plate is fixed. The anti-falling device is compact in structure, the stress area of the self-locking base plate is large, the stopping effect is good, warping is not prone to occurring, and the applicable working platform is wide in descending situation.

In a preferred embodiment, the switching block is arranged close to the cylinder fixing plate, and even if the switching block is initially contacted, the self-locking base plate is stressed greatly, the switching block abuts against the cylinder fixing plate, and the stability of the self-locking base plate is improved.

In a preferred embodiment, the cylinder piston rod is located below the cylinder fixing plate, correspondingly, the self-locking base plate is located below the cylinder fixing plate, and the sliding block is located between the cylinder fixing plate and the self-locking base plate, so that the self-locking base plate is stable when being stressed.

In a preferred embodiment, the device further comprises a buffer pad, the buffer pad is arranged on the surface of the self-locking base plate, and more preferably, the buffer pad is made of rubber, so that the working platform and the self-locking base plate which fall or descend are prevented from being in hard contact with each other to damage the working platform and the stability of the device.

In a preferred embodiment, the cylinder piston rod is in floating connection with the adapter block through a floating joint, so that the direction of the force for driving the self-locking cushion plate by the cylinder piston rod is coaxial with the piston rod.

In a preferred embodiment, the notch is U-shaped, and the adapter block is located in a concave portion of the U-shaped notch.

In a preferred embodiment, the anti-falling device further comprises a speed measurement component, and the speed measurement component triggers the control component when detecting that the actual speed of the working platform is greater than the preset running speed.

Drawings

Fig. 1 is a schematic view of a fall arrest device according to an embodiment of the present invention;

fig. 2 is a side view of a fall arrest device in accordance with an embodiment of the present invention;

fig. 3 is a front view of a fall arrest device in accordance with an embodiment of the present invention;

fig. 4 is a rear view of the fall arrest device in accordance with an embodiment of the present invention;

fig. 5 is a schematic view of a cylinder and a switching block of the anti-falling device according to an embodiment of the present invention;

fig. 6 is a schematic view of the lifting mechanism of the present invention;

fig. 7 is a schematic view of another view angle of the lifting mechanism of the present invention.

Description of the main elements

Detailed Description

In order to make the objects, principles, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration and are not intended to limit the invention, as described in this summary of the invention.

It should be particularly noted that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and the connection or positional relationship can be determined according to the text or technical content of the description.

It can be understood that the anti-falling device mentioned in the application is used for a lifting mechanism, and the lifting mechanism is characterized in that one end of a transmission rod is fixedly connected with a working platform through a nut and the like, and the other end of the transmission rod is controlled by a driving mechanism. The working platform is moved in the vertical direction by the driving rod, and as shown in fig. 6 and 7, the lifting mechanism 1 comprises the working platform 20 and the driving rod 30. Of course, there are also lifting mechanisms that use chain type or wire rope to drive. For convenience of description, the present application is described in conjunction with a typical elevator mechanism including a transmission rod, and those skilled in the art will understand that the present application is also applicable to elevator mechanisms using other types of transmission mechanisms such as a chain transmission.

Referring to fig. 1 and fig. 2 in turn, an embodiment of the anti-falling device 10 is shown, and in this embodiment, the device includes a cylinder fixing plate 101, a vertical plate 106, a sliding rail 1011, a cylinder, a sliding block 102, and a self-locking base plate 104;

the cylinder is horizontally arranged and fixed on the cylinder fixing plate 101, at least one sliding rail 1011 is arranged on the cylinder fixing plate 101, in the embodiment, 2 sliding rails 1011 are adopted, and the sliding rails 1011 are arranged in parallel to the cylinder piston rod 1031; it is understood that since the cylinder is horizontally disposed, the cylinder piston rod 1031 is also horizontally disposed, and then the corresponding slide rail 1011 is also horizontally disposed. As shown in fig. 3 and fig. 4, the sliding block 102 is engaged with the sliding rail 1011, and moves along the sliding rail 1011 relative to the cylinder fixing plate 101; the self-locking base plate 104 is arranged in parallel to the sliding rail 1011, and the cushion block and one side of the sliding block 102 far away from the sliding rail are fixedly installed, namely the sliding block 102 is positioned between the cushion block and the cylinder fixing plate 101; the self-locking backing plate 104 is fixedly provided with a transfer block 1041, the cylinder piston rod 1031 is connected with the transfer block 1041, in an embodiment, referring to fig. 5, the cylinder piston rod 1031 is connected with the transfer block 1041 in a floating manner through a floating joint 105, so that the direction of the force of the cylinder piston rod 1031 driving the self-locking backing plate 104 is coaxial with the piston rod, even if the movement process of the self-locking backing plate 104 is more stable. Preferably, in this embodiment, the adapter block 1041 is disposed near the cylinder fixing plate 101, and the cylinder piston rod 1031 is located below the cylinder fixing plate 101, so that the cylinder fixing plate 101, the slider 102, and the self-locking pad 104 are sequentially arranged in the vertical direction. When the self-locking base plate 104 receives an instant downward acting force, the self-locking base plate 104 deforms, and the front end of the self-locking base plate 104 is not easy to bend downward due to the fact that the adapter block 1041 abuts against the cylinder fixing plate 101, and the structural stability of the device is improved. It can be understood that, in another embodiment, the cylinder piston rod 1031 may also be located above the cylinder fixing plate 101, and then, in the vertical direction, the cylinder piston rod 1031, the self-locking pad 104, the slider 102, and the cylinder fixing plate 101 are sequentially arranged, and similarly, when the self-locking pad 104 receives a downward acting force, the adapter block 1041 abuts against the cylinder fixing plate 101, so that the self-locking pad 104 is not easily warped. In this connection, it should be noted that the self-locking pad 104 and the sliding block 102 are preferably detachably connected by bolts or the like, and only the self-locking pad 104 needs to be replaced when the deformation of the self-locking pad 104 is unavoidable.

The cylinder piston rod 1031 drives the self-locking pad plate 104, and the self-locking pad plate 104 moves along the direction defined by the slide rail 1011 through the slide block 102, so that it can be understood that the slide block 102 and the slide rail 1011 guide the movement of the self-locking pad plate 104 and provide a certain supporting force. The self-locking backing plate 104 is provided with a notch for accommodating a transmission rod of the lifting mechanism, so that the interference of the movement of the transmission rod is avoided, the outward extending area of the self-locking backing plate 104 is increased as much as possible, the stress area of the self-locking backing plate 104 is increased, and the stability of the anti-falling device 10 is improved. In a preferred embodiment, the notch is U-shaped, and the adapter block 1041 is located in a concave portion of the U-shaped notch, so that when the cylinder pushes the self-locking pad 104, the self-locking pad 104 is uniformly stressed, and is not easily stressed and reversely deflected when being pushed out quickly.

As noted above, while the fall arrest device 10 of the present application corresponds to a differently driven lift mechanism, a housed and possibly chain drive mechanism, etc.

The working process of the anti-falling device 10 provided by the present application is described below, when the transmission rod stalls, and drives the working platform to descend downward, or when the working platform is failed to connect with the transmission rod, and the working platform descends, the control assembly is triggered, and the control assembly controls the air cylinder to pass through the adapter block 1041, so as to drive the self-locking cushion plate 104 to move. It should be understood that in a possible embodiment, the triggering of the control assembly may be implemented by a speed measurement assembly such as a speed sensor, and when the speed sensor detects that the speed of the working platform in the lifting mechanism is greater than the preset movement speed of the lifting mechanism, the overspeed signal triggers the control assembly to drive the self-locking backing plate 104 to move. In another embodiment, a fiber optic sensor may be used, where the same self-locking shim plate 104 is extended when the work platform is moved upward above a predetermined position above the upper portion of the self-locking shim plate 104, and where the self-locking shim plate 104 is retracted when the work platform is moved downward below the predetermined position above the upper portion of the self-locking shim plate 104. Specifically, for the extending process, because the self-locking base plate 104 is fixedly connected with the slider 102, the self-locking base plate 104 moves to the lower side of the working platform along the direction defined by the slide rail 1011, namely, the horizontal direction moves rapidly, the transmission rod is accommodated through the notch formed in the self-locking base plate 104, when the recess of the notch is about to contact the transmission rod, the cylinder piston rod 1031 stops moving, the self-locking base plate 104 receives the falling working platform or stops the working platform which is lowered due to the stalling of the transmission rod, and the working platform is stopped at the self-locking base plate 104 to prevent the further lowering.

In order to fix the fall arrest device 10 of the present application to the lifting mechanism, in one embodiment, the fall arrest device 10 can be fixed to the vertical plate 106, and then fixed to the lifting mechanism via the vertical plate 106. As shown in fig. 6 and 7, one side of the vertical plate 106 is fixedly connected to the cylinder fixing plate 101, and the other side is fixedly connected to the lifting mechanism, so that the anti-falling device 10 provided by the present application can be conveniently assembled with the lifting mechanism. Typically, the vertical plate 106 is fixedly connected to a cross beam of the lifting mechanism. It can be understood that the shape of the vertical plate 106 is not limited in the present application, and the vertical plate 106 can also be understood as other connecting members for fixing the cylinder fixing plate and the cross beam of the lifting mechanism, and is not particularly limited to a rectangular plate-shaped connecting member.

Preferably, with reference to the embodiment of fig. 1 to 3, the device further includes a buffer pad disposed on the surface of the self-locking pad 104, and more preferably, the buffer pad is made of rubber, so as to prevent the falling or descending work platform from being in hard contact with the self-locking pad 104, and thus the work platform and the stability of the device are damaged.

It should be noted that, in the foregoing embodiment, each included module is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, the specific names of the functional units are also only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present invention. As for the connection relationship between the components, if not specifically mentioned, it is understood that a detachable connection such as a bolt connection or a non-detachable connection such as a rivet connection is used.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fall arrest device for a lifting mechanism, comprising: the device comprises a cylinder fixing plate, a vertical plate, a sliding rail, a cylinder, a sliding block and a self-locking base plate;

the air cylinder is horizontally arranged and fixed on an air cylinder fixing plate, and at least one sliding rail is arranged on the air cylinder fixing plate and is parallel to an air cylinder piston rod;

one end of the vertical plate is connected with the air cylinder fixing plate, and the other end of the vertical plate is fixed with the lifting mechanism;

the sliding block is matched with the sliding rail, and the sliding block moves relative to the air cylinder fixing plate along the sliding rail;

the self-locking base plate is arranged parallel to the slide rail, and the cushion block and one side of the slide block, which is far away from the slide rail, are fixedly installed;

a transfer block is fixedly arranged on the self-locking base plate, and the piston rod of the air cylinder is connected with the transfer block;

the cylinder piston rod drives the self-locking base plate, and the self-locking base plate moves along the direction limited by the slide rail through the slide block;

the self-locking base plate is provided with a notch and used for accommodating a transmission rod of the lifting mechanism;

the anti-falling device further comprises a control assembly, and the control assembly controls the air cylinder.

2. The fall arrest device according to claim 1, wherein the cylinder piston rod is located below the cylinder mounting plate.

3. A fall arrest device according to claim 1 or claim 2, wherein the junction block is located adjacent to the cylinder retaining plate.

4. The fall arrest device according to claim 3, further comprising a bumper pad disposed on the self locking panel surface.

5. The fall arrest device according to claim 4, wherein the cylinder piston rod is in floating connection with the adaptor block by means of a floating joint.

6. The fall arrest device according to claim 5, wherein the notch is U-shaped and the adapter block is located in a recess of the U-shaped notch.

7. A fall arrest device according to claim 5, wherein the device further comprises a velocity measurement assembly.