CN216836654U - Rope breakage preventing device for lifting device, lifting machine and elevator - Google Patents

Abstract

The utility model relates to a rope breaking prevention device used for a lifting device, a lifter and an elevator. Specifically, the lifting device includes a bearing part and a lifting part, and the rope breaking device includes: a spring, the upper end of the spring is lifted and lowered under the driving of the lifting part, and the lower end of the spring is connected to the top of the bearing part, so that the spring loses its upward pulling force after the upper end of the spring loses its upward pulling force. , to shrink; brake lever, the inner end of the brake lever is rotatably installed on the peripheral wall of the bearing part, the outer end of the brake lever is obliquely below the inner end; and the transmission device, when the spring shrinks, the spring drives the transmission device to make The outer end of the brake lever turns upwards. The rope breaking prevention device used for the lifting device of the utility model has quick response, can quickly brake the bearing part, and is safe and reliable.

Description

Rope protection devices for lifting devices, lifts and elevators

technical field

The utility model relates to the technical field of lifting devices, in particular to an anti-rope breaking device, a lift and an elevator for a lifting device.

Background technique

In order to ensure the safety of the operation of the lifting device, for various possible dangers, the lifting device is equipped with a special safety device, and the commonly used safety devices are speed limiters and safety gears. At present, the safety gear is a safety device that emergency stops the bearing part and clamps it on the guide rail under the control of the speed limiter and the suspension rope breaks and loosens. However, the safety gear needs to be used in conjunction with the speed limiter. The normal operation speed of the lifting device is not enough to make the speed limiter work. If an accident occurs, the lifting device needs to be lowered and accelerated for a period of time, so that the speed limiter can work and the safety gear can work, and the response speed is faster. slow. In addition, with the clamping brake, it is easy to fail under the gravity of the bearing part.

Utility model content

The purpose of the utility model is to provide a rope breaking prevention device for a lifting device, which has quick response, can quickly brake the bearing portion, and is safe and reliable.

Specifically, the present invention provides an anti-rope device for a lifting device, the elevating device includes a bearing part and a lifting part, and the anti-rope device includes a spring, a brake lever and a transmission device. The upper end of the spring moves up and down under the driving of the lifting portion, and the lower end of the spring is connected to the top of the bearing portion, so that the spring shrinks after the upper end of the spring loses the upward pulling force. The inner end of the braking rod is rotatably mounted on the bearing portion, and the outer end of the braking rod is located obliquely below the inner end. When the spring contracts, the spring rotates the outer end of the brake lever upward through the transmission.

Optionally, the rope breaking prevention device further includes a connecting block, the connecting block is connected to the upper end of the spring, and the connecting block is moved up and down under the driving of the elevating part. When the spring contracts, the connecting block drives the outer end of the brake rod to rotate upward through the transmission device.

Optionally, the transmission device includes a transmission lever and a connecting rope. The transmission lever includes a first section and a second section, the first section is plate-shaped, the plate surface is provided with a long hole, the spring passes through the long hole, and the first section is located in the bearing. The second section is located above the brake lever, and the transmission lever is rotatable at the connection of the first section and the second section Installed on the top of the carrying portion. The upper end of the connecting rope is connected with the outer end of the second section, and the lower end of the connecting rope is connected with the outer end of the brake lever.

Optionally, there are a plurality of each of the transmission lever, the braking rod and the connecting rope, and the plurality of the braking rods are respectively arranged around the bearing portion.

Optionally, the area of the cross section of the inner end of the brake rod is smaller than the area of the cross section of the outer end of the brake rod, and the outer end face of the brake rod is provided with anti-skid lines.

Optionally, the peripheral wall of the bearing portion is provided with a limiting device to limit the upward rotation stroke of the brake lever, and the brake lever is at a lower outer end and a lower inner end when the outer end of the brake lever is rotated upward to the highest position. high tilt state.

Optionally, the anti-rope device further includes a safety gear, and the outer end of the transmission lever is connected to the triggering device of the safety gear, so that when the outer end of the transmission lever rotates upward, the triggering device is driven. action, so as to make the actuator of the safety gear act to clamp the guide rail.

Optionally, the connecting rope is a steel wire rope, the lifting part includes a moving pulley, the connecting block is the moving pulley, and the outer end of the transmission lever and the triggering device are connected by a safety rope.

The utility model also provides an elevator, comprising a well, a hanging cage, a lifting part and any of the above-mentioned rope breaking devices; the upper end of the spring is lifted and lowered under the driving of the lifting part, and the lower end of the spring is connected to the On the top of the cage, the outer end of the brake lever contacts the hoistway after being rotated upwards.

The utility model also provides an elevator, comprising a hoistway, a car, a lifting part and any of the above-mentioned rope breaking devices; the upper end of the spring is lifted and lowered under the driving of the lifting part, and the lower end of the spring is connected to the At the top of the car, the outer end of the brake lever contacts the hoistway after being rotated upward.

In the anti-rope device, elevator and elevator of the utility model, after the upper end of the spring loses its upward pulling force, the spring shrinks, the outer end of the braking rod is rotated upward through the transmission device, and the outer end of the braking rod is in contact with the hoistway, so that the The brake rod supports the peripheral wall of the bearing part and the shaft, and has the effect of emergency braking of the bearing part, and the response is fast. In particular, the two ends of the brake lever are used to hold the brake tightly, and the source of the braking force is the gravity of the bearing part. It can be said that the greater the gravity, the better the braking effect, so that the lifting device has a very good braking effect, that is, it is safe and reliable. , the brake failure will not occur due to excessive gravity. Moreover, the rope breaking prevention device of the present invention is simple in structure and convenient in maintenance.

Description of drawings

1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention;

Fig. 2 is the structural schematic diagram of the transmission lever in the rope breaking prevention device according to the embodiment of the present invention;

3 is a schematic structural diagram of a brake lever in the rope breaking prevention device according to an embodiment of the present invention.

Detailed ways

1 is a schematic structural diagram of a lifting device according to an embodiment of the present utility model, FIG. 2 is a structural schematic diagram of a transmission lever in an embodiment of the present utility model, and FIG. Schematic diagram of the structure of the moving rod. The lifting device includes a bearing part 100 and a lifting part. The rope breaking device includes a spring 210 , a brake lever 220 and a transmission device 330 . The upper end of the spring 210 rises and falls under the driving of the lifting portion, and the lower end of the spring 210 is connected to the top of the bearing portion 100 , so that the spring 210 shrinks after the upper end of the spring 210 loses the upward pulling force. The inner end of the brake lever 220 is rotatably mounted on the bearing portion 100 , for example, on the outer periphery of the bearing portion 100 , and the outer end of the brake lever 220 is located obliquely below the inner end. When the spring 210 contracts, the spring 210 drives the transmission device 330 to rotate the outer end of the brake lever 220 upward.

When the rope breaking prevention device of the embodiment of the present invention is in operation, the lifting portion drives the bearing portion 100 to lift and lower through the spring 210, and the spring 210 is in a stretched state at this time. When the lifting part fails, for example, when the traction rope is disconnected, the upper end of the spring 210 loses the upward pulling force, so that the downward movement of the bearing part 100 is dangerous. In particular, the spring 210 shrinks at the same time, and the spring 210 drives the transmission device 330 to rotate the outer end of the brake lever 220 upwards, so that the brake lever 220 supports the well 500 and the bearing portion 100, thereby stopping the bearing portion 100 from descending.

Further, the lifting device may be a lift or an elevator, and the bearing portion 100 may be a cage or a car. That is to say, the anti-rope device of the present invention can be applied not only to elevators with a hoistway, but also to elevators with a hoistway, that is, the anti-rope device of the present invention can be used in a lift device with a hoistway. Widely, the hoistway of the lifting device has a wall surface for holding up.

In some unprotected embodiments, the frame can be used to form a channel for the car to move. After the brake rod 220 of the rope breaking device of the present invention is stretched, it can also be stuck on the support frame rod under the brake rod 220. However, the distance between the brake rod 220 and the supporting frame rod below is not certain, and sometimes it is very large, so that the car needs to fall for a long distance to be able to brake, and a huge impact force is generated on the brake rod, braking The effect is relatively poor. The utility model adopts the brake rod 220 to hold the hoistway and the car tightly, and obviously does not have the above-mentioned defects.

In some embodiments of the present invention, the rope breaking device further includes a connecting block 240 having a certain mass, the connecting block 240 is connected to the upper end of the spring 210 , and the connecting block 240 is moved up and down by the elevating part. When the spring 210 shrinks, the connecting block 240 drives the outer end of the brake rod 220 to rotate upward through the transmission device 330 under the driving of its own gravity and the pulling force of the spring 210, so that the brake rod 220 can support the shaft 500 and the peripheral wall of the bearing portion 100 tightly. Furthermore, the bearing portion 100 is braked.

In some embodiments of the present invention, the transmission device 330 includes a transmission lever 231 and a connecting rope 235 . As shown in FIGS. 1 and 2 , the transmission lever 231 includes a first section 232 and a second section 233 , and the transmission lever 231 is rotatably mounted on the bearing portion at the connection of the first section 232 and the second section 233 100 top. The upper end of the connecting rope 235 is connected with the outer end of the second section 233 , and the lower end of the connecting rope 235 is connected with the outer end of the brake lever 220 . The connecting block 240 first moves downward under its own gravity and the pulling force of the spring 210 , and then impacts the first section 232 to drive the second section 233 to rotate upward, and then drives the brake lever 220 to rotate upward through the connecting rope 235 . The use of the transmission lever 231 and the connecting rope 235 makes the rope breaking prevention device simple in structure, low in cost and convenient in maintenance. Further, in order to ensure impact, the first section 232 is plate-shaped, and the first section is provided with an elongated hole 234 through which the spring 210 passes.

In some embodiments of the present invention, there are multiple transmission levers 231 , braking rods 220 and connecting ropes 235 . It can be rotated upwards at the same time, respectively supporting the corresponding hoistway 500 and the peripheral wall of the bearing part 100, so that the bearing part 100 can stop descending more quickly, and the load of each brake lever 220 is also smaller and the service life is longer. Preferably, as shown in FIG. 1 , there are two braking rods 220 and two connecting ropes 235 , which are respectively disposed on the left and right sides of the bearing portion 100 .

In some embodiments of the present invention, the area of the cross section of the inner end of the brake lever 220 is smaller than the area of the cross section of the outer end of the brake lever 220 . The area of the end surface of the outer end of the brake rod 220 is larger, and the area of the end surface in contact with the well wall is larger, and the time for the bearing portion 100 to stop descending is also shorter. Preferably, as shown in FIG. 3 , the outer end surface of the brake rod 220 is provided with anti-skid lines 221 . During the contact between the outer end of the brake rod 220 and the hoistway 500 , the friction is greater and the effect is better.

Since the spring 210 and the connecting block 240 are not directly connected with the transmission lever 231, they will not drive the first segment 232 to rotate upward, so that the outer end of the brake lever 220 is at the initial position. In this embodiment, since the area of the cross section of the outer end of the brake lever 220 is larger than that of the inner end of the brake lever 220 , the mass of the outer end of the brake lever 220 is larger than the mass of the inner end of the brake lever 220 . Under the action of gravity, the outer end of the brake lever 220 is located obliquely below the inner end, which prevents the outer end of the brake lever 220 from rotating upward during the normal descending process of the bearing portion 100, contacting the well 500, and preventing the bearing portion 100 from being normal. run.

In some embodiments of the present invention, the peripheral wall of the bearing portion 100 is provided with a limiting device 300 to limit the upward rotation stroke of the brake lever 220, and the brake lever 220 is at the outer end when the outer end thereof is rotated upward to the highest position Low and high inner end tilted state. The limiting device 300 prevents the outer end of the brake lever 220 from turning upwards to the highest position, so that the brake lever 220 is in a normal braking state and will not fail. For example, the limiting device 300 can be a stopper located above the brake lever 220 .

In some embodiments of the present invention, the rope breaking device further includes a safety gear, and the outer end of the transmission lever is connected to the trigger device 410 of the safety gear, so that when the transmission lever rotates upward at its outer end, it drives the trigger device 410 to move, Then, the actuator of the safety gear acts to clamp the guide rail, so that the lifting device has a double braking mode, and the safety protection effect is better.

In some embodiments of the present invention, the connecting rope 235 is a steel wire rope, and the steel wire rope has good flexibility, high strength, long service life, and is more suitable for use. The lifting part includes a movable pulley and a traction rope, and the connecting block 240 is a movable pulley, so that the rope breaking prevention device can directly use the components of the lifting part. In some alternative embodiments, a winding lifting method can also be used, that is, the lifting part is a drum-type hoist, and the traction rope of the drum-type hoist is connected to the connection block 240 . Alternatively, in some alternative embodiments, the connection block 240 is not used, and the traction rope of the drum hoist is connected to the upper end of the spring.

The embodiment of the present invention also provides an elevator, which is mainly used in construction, and includes a shaft 500, a hanging cage, a lifting part, and the rope breaking device in any of the above embodiments. After the upper end of the spring loses the upward pulling force, the spring shrinks, and the outer end of the brake rod is rotated upward through the transmission device, and the outer end of the brake rod is in contact with the hoistway 500, so that the brake rod supports the peripheral wall of the cage and the hoistway 500, It has the effect of emergency braking of the cage, and the response is fast. In particular, the two ends of the brake lever are used to hold the brake tightly, and the source of the braking force is the gravity of the cage. It can be said that the greater the gravity, the better the braking effect, so that the elevator has a very good braking effect, that is, it is safe and reliable. No brake failure due to excessive gravity.

The present invention also provides an elevator, which includes a hoistway 500, a car, a lifting part, and the anti-rope breaking device in any of the above embodiments. After the traction rope of the elevator is broken, the working process of the anti-broken rope device is similar to that of the elevator, and will not be repeated here.

The above only describes the preferred application examples of the present invention, but should not be construed as limiting the claims, and the structure of the present invention may have other changes, which are not limited to the above-mentioned structures. In a word, all changes made within the protection scope of the independent claims of the present utility model are all within the protection scope of the utility model.

Claims (10)

1. A rope breakage preventing device for a lifting device, the lifting device including a carrying portion (100) and a lifting portion that are lifted in a hoistway (500), characterized in that the rope breakage preventing device includes:

the lower end of the spring (210) is connected with the top of the bearing part (100), and the upper end of the spring (210) is driven by the lifting part to lift, so that the spring (210) contracts after the upper end of the spring (210) loses upward tension;

a brake lever (220), wherein the inner end of the brake lever (220) is rotatably mounted on the bearing part (100), and the outer end of the brake lever (220) is positioned obliquely below the inner end; and

and the spring (210) enables the outer end of the brake lever (220) to rotate upwards through the transmission device when the spring (210) contracts, so that the outer end of the brake lever (220) is contacted with the wall surface of the hoistway (500) after rotating upwards.

2. The rope breakage preventing device according to claim 1, further comprising a connecting block (240), wherein the connecting block (240) is connected to an upper end of the spring (210), and the connecting block (240) is lifted by the lifting part; when the spring (210) is contracted, the connecting block (240) drives the outer end of the brake lever (220) to rotate upwards through the transmission device.

3. The rope breakage prevention device of claim 2, wherein the transmission device comprises:

a transmission lever (231), the transmission lever (231) comprising a first section (232) and a second section (233), the first section (232) being located above the carrier (100) and below the connection block (240); the first section (232) is plate-shaped, a long hole (234) is formed in the first section (232), and the spring (210) penetrates through the long hole (234); the second section (233) is located above the brake lever (220), and the transmission lever (231) is rotatably mounted on the top of the carrier (100) at the connection of the first section (232) and the second section (233);

a connecting rope (235), wherein the upper end of the connecting rope (235) is connected with the outer end of the second section (233), and the lower end of the connecting rope (235) is connected with the outer end of the brake rod (220).

4. The device according to claim 3, wherein the transmission lever (231), the brake lever (220) and the connection rope (235) are provided in plurality, and the brake levers (220) are respectively provided around the carrier (100).

5. The device for preventing the rope from being broken according to the claim 1, characterized in that the cross section area of the inner end of the brake lever (220) is smaller than that of the outer end of the brake lever (220), and the end surface of the outer end of the brake lever (220) is provided with an anti-skid thread (221).

6. The device according to claim 1, wherein a stopper (300) is provided on the carrier (100), the stopper (300) is used to limit the upward rotation stroke of the brake lever (220), and the brake lever (220) is in an inclined state with a low outer end and a high inner end when the outer end is rotated upward to the highest position.

7. The rope breakage preventing device according to claim 3, further comprising a safety gear, wherein an outer end of the transmission lever (231) is connected with a trigger device (410) of the safety gear, so that the transmission lever (231) drives the trigger device (410) to act when the outer end of the transmission lever rotates upwards.

8. The device of claim 7, wherein the connecting rope (235) is a steel wire rope, the lifting part comprises a movable pulley, the connecting block (240) is the movable pulley, and the outer end of the transmission lever (231) is connected with the triggering device (410) through a safety rope.

9. The elevator comprises a hoistway (500), a cage and a lifting part, and is characterized by further comprising the rope breakage preventing device as claimed in any one of claims 1 to 8, wherein the upper end of the spring (210) is driven by the lifting part to lift, the lower end of the spring (210) is connected with the top of the cage, and the outer end of the brake lever (220) is in contact with the hoistway (500) after rotating upwards.

10. Elevator, including well (500), car and lifting portion, characterized by, still include the rope breakage preventing device of any one of claims 1-8, the upper end of spring (210) goes up and down under the drive of lifting portion, the lower extreme of spring (210) is connected the car top, the outer end of brake lever (220) after upwards rotating with well (500) contact.

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