CN210944645U

CN210944645U - Crane lifting height limiting device

Info

Publication number: CN210944645U
Application number: CN201922068849.3U
Authority: CN
Inventors: 赵建军
Original assignee: Henan Zhongyuan Mining Equipment Co ltd
Current assignee: Henan Zhongyuan Mining Equipment Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-07-07
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a hoist lifting height limiting device in hoisting machinery technical field, the winding drum comprises a winding drum, be equipped with the reel axle in the reel, around there being wire rope on the reel axle, just wire rope stretches out the one end of reel downwards and is equipped with the lifting hook, the one end of reel is equipped with the housing, electrode plate, bottom are equipped with the slide bar on the housing inner chamber top is equipped with, the top of slide bar is equipped with and goes up electrode plate matched with lower electrode slice, and the cover is equipped with first spring on the slide bar, the slide bar bottom links to each other with the one end of horizontal pole after downwardly extending the housing with housing sliding connection, the other end of horizontal pole is equipped with the counter weight ring, the counter weight ring cover is located on wire rope. The utility model discloses a counter weight ring that the cover was located on the steel wire detects the lifting hook position, and the vertical sliding connection of cooperation slide bar and housing drives electrode slice rebound down, and then makes control circuit switch on through the contact of last electrode slice with electrode slice down, realizes the braking of reel.

Description

Crane lifting height limiting device

Technical Field

The utility model relates to a hoisting machinery technical field, concretely relates to hoist lifting height limiting device.

Background

When the crane works, the lifting height of the lifting hook needs to be controlled to prevent the lifting hook from rushing to jack when lifting, and the current common method is as follows: and a height limiter is arranged at one end of the winding drum, an input shaft of the height limiter and the winding drum shaft rotate in equal proportion, and the lifting height is controlled by measuring the number of rotation turns of the winding drum shaft. However, when the suspension arm is a telescopic arm, the height limiter is not accurate in limiting, belongs to indirect measurement and has larger error. Meanwhile, in the hoisting process, an operator is positioned below the lifting hook in an inclined mode, the hoisting height of the lifting hook is difficult to grasp, the hoisting height is too high or too low, the appropriate hoisting height can be found only by adjusting for many times under the cooperation of workers, and the whole hoisting efficiency is further influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a crane lifting height limiting device.

The utility model discloses the technical scheme who adopts does:

the utility model provides a hoist hoisting height limiting device, includes the reel, be equipped with the reel axle in the reel, around there being wire rope on the reel axle, just wire rope stretches out the one end of reel downwards and is equipped with the lifting hook, the one end of reel is equipped with the housing, housing inner chamber top is equipped with the electrode piece, the bottom is equipped with the slide bar, the top of slide bar be equipped with last electrode piece matched with lower electrode piece, and the cover is equipped with first spring on the slide bar, slide bar bottom and housing sliding connection link to each other with the one end of horizontal pole after downwardly extending the housing, the other end of horizontal pole is equipped with the counter weight ring, the counter weight ring cover is located on the wire rope.

Preferably, a second spring is arranged between the upper electrode plate and the housing.

Preferably, the bottom end of the sliding rod is rotatably connected with one end of the cross rod.

Preferably, the cross bar is a telescopic bar.

Preferably, one side of reel is equipped with the notch along the reel axial, sliding connection has a slider in the notch, slider threaded connection is on the screw rod, the both ends of screw rod rotate with the mounting panel at notch both ends respectively and are connected, and the one end and the driving motor transmission of screw rod are connected, be equipped with proximity switch on the slider, proximity switch establishes ties in indicating circuit.

Compared with the prior art, the utility model has the advantages that:

1. the utility model discloses a counter weight ring that the cover was located on the steel wire detects the lifting hook position, and the vertical sliding connection of cooperation slide bar and housing drives electrode slice rebound down, and then makes control circuit switch on through the contact of last electrode slice with electrode slice down, realizes the braking of reel.

2. The utility model discloses a set up notch and slider on the reel to the adjustment that the round trip movement of slider in the notch realized the proximity switch position is driven in the rotation through the screw rod, and then confirms through proximity switch response wire rope's change and hangs the height, and the operator of being convenient for adjusts and increases.

Drawings

Fig. 1 is one of the schematic structural diagrams of the present invention;

fig. 2 is a second schematic structural diagram of the present invention;

FIG. 3 is a circuit diagram of the present invention;

the device comprises a winding drum 1, a housing 2, a steel wire rope 3, a lifting hook 4, an upper electrode plate 5, a second spring 6, a sliding rod 7, a lower electrode plate 8, a first spring 9, a threading hole 10, a cross rod 11, a matching middle ring 12, a notch 13, a sliding block 14, a screw rod 15, a driving motor 16, a proximity switch 17, a mounting plate 18 and an indicator light 19.

Detailed Description

The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way. The unit module components, structures, mechanisms, sensors and other devices referred to in the following examples are all conventional and commercially available products unless otherwise specified.

Example 1: as shown in fig. 1, a crane lifting height limiting device comprises a winding drum 1 and a housing 2 detachably connected to the right end of the winding drum 1, wherein a winding drum shaft is arranged in the winding drum 1, a steel wire rope 3 is wound on the winding drum shaft, and a lifting hook 4 is arranged at one end of the steel wire rope 3, which extends downwards out of the winding drum 1; an upper electrode plate 5 is arranged at the top of an inner cavity of a housing 2, the upper electrode plate 5 is fixedly connected with the top wall of the inner cavity of the housing 2 through a second spring 6, a sliding rod 7 is arranged at the bottom of the inner cavity of the housing 2, a lower electrode plate 8 matched with the upper electrode plate 5 is arranged at the top end of the sliding rod 7, a first spring 9 is sleeved on the sliding rod 7, the bottom end of the first spring 9 is fixedly connected with the bottom wall of the inner cavity of the housing 2, the top end of the first spring is fixedly connected with the upper electrode plate 8, a threading hole 10 is arranged on the housing 2, the threading hole 10 is used for a lead to enter the inner cavity of the housing 2 and is respectively electrically connected with the upper electrode plate 5 and the lower electrode plate 8, the bottom end of the sliding rod 7 downwards penetrates through the housing 2 and then is connected with one end of a cross rod 11 through a bearing in a rotating manner in, the matching middle ring 12 is sleeved on the steel wire rope 3.

Example 2: as shown in fig. 2 and fig. 3, this embodiment is a further improvement based on embodiment 1, and its purpose is to facilitate the adjustment of the hanging height by an operator, a notch 13 communicating with the inner cavity of the winding drum 1 is provided at one side of the winding drum 1 along the axial direction of the winding drum, a slider 14 is slidably connected in the notch 13, the slider 14 is screwed on a screw rod 15, two ends of the screw rod 15 are respectively rotatably connected with mounting plates 18 fixedly provided on the winding drum 1 at two ends of the notch 13, and one end of the screw rod 15 is also in transmission connection with a driving motor 16, the rotation of the screw rod 15 is driven by the rotation of the driving motor 16, so as to realize the back-and-forth sliding of the slider 14; the slide block 14 is provided with a proximity switch 17, the proximity switch 17 is connected in series with an indicating circuit, an indicating lamp 19 is connected in series with the indicating circuit, and the indicating lamp 19 is arranged in a crane cab.

The operation and use method of the device is as follows:

when the steel wire rope 3 drives the lifting hook 4 to lift, after the top of the lifting hook 4 is in contact with the counterweight ring 12, the counterweight ring 12 starts to move upwards under the driving of the lifting hook 4, and then the sliding rod 7 is driven to move upwards until the lower electrode plate 8 is in contact with the upper electrode plate 5, and the control circuit is electrified and controls the winding drum 1 to stop rotating; when the hoisting operation is carried out, the hoisting hook 4 is hoisted to a target height in advance under the state of an empty hook, then the driving motor 16 is started, under the driving of the driving motor 16, the screw rod 15 drives the sliding block 14 to move along the notch 13 until the power-on state of the indicator lamp 19 is changed into the power-off state (namely the proximity switch 17 cannot detect the steel wire rope 3 from the detection of the steel wire rope 3), at the moment, the height to be hoisted is the height, the driving motor 16 is stopped, the hoisting operation is carried out, and after the steel wire rope 3 is wound to the target height, the proximity switch 17 can detect the steel wire rope 3 and control the indicator lamp 19 to be powered on, so that an operator is prompted to.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a hoist hoisting height limiting device, includes the reel, be equipped with the reel axle in the reel, around there being wire rope on the reel axle, just wire rope stretches out the one end of reel downwards and is equipped with lifting hook, its characterized in that: the winding drum is characterized in that a housing is arranged at one end of the winding drum, an upper electrode plate is arranged at the top of an inner cavity of the housing, a sliding rod is arranged at the bottom of the inner cavity of the housing, a lower electrode plate matched with the upper electrode plate is arranged at the top end of the sliding rod, a first spring is sleeved on the sliding rod, the bottom end of the sliding rod is connected with the housing in a sliding mode and is connected with one end of a cross rod after the housing extends downwards, a counterweight ring is arranged at the other end of the cross rod, and the counterweight.

2. A crane hoist height limiting arrangement as claimed in claim 1, wherein: and a second spring is arranged between the upper electrode plate and the housing.

3. A crane hoist height limiting arrangement as claimed in claim 1, wherein: the bottom end of the sliding rod is rotatably connected with one end of the cross rod.

4. A crane hoist height limiting arrangement as claimed in claim 1, wherein: the cross rod is a telescopic rod.

5. A crane hoist height limiting arrangement as claimed in claim 1, wherein: the housing is detachably connected with the winding drum.

6. A crane hoist height limiting arrangement as claimed in claim 1, wherein: one side of reel is equipped with the notch along the reel axial, sliding connection has a slider in the notch, slider threaded connection is on the screw rod, the both ends of screw rod rotate with the mounting panel at notch both ends respectively and are connected, and the one end and the driving motor transmission of screw rod are connected, be equipped with proximity switch on the slider, proximity switch establishes ties in indicating circuit.