CN217350430U

CN217350430U - Gantry crane with deviation correcting device

Info

Publication number: CN217350430U
Application number: CN202121514475.4U
Authority: CN
Inventors: 郑之松
Original assignee: Hefei Zhenghao Mechanical Technology Co ltd
Current assignee: Hefei Zhenghao Mechanical Technology Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-09-02
Anticipated expiration: 2031-07-05

Abstract

The utility model relates to the technical field of gantry cranes, in particular to a gantry crane with a deviation correcting device, which comprises a travelling mechanism and a PLC controller, wherein the travelling mechanism comprises a travelling wheel box, the front end of the travelling wheel box is provided with an anti-collision rod and a deviation correcting box, the deviation correcting box is rotatably provided with a measuring wheel, the measuring wheel is connected with an encoder, the encoder and the travelling mechanism are both electrically connected with the PLC controller, a rotating shaft of the encoder is connected with a rotating shaft of the measuring wheel, the encoder transmits the data of the angular displacement of the travelling wheels at two sides of the gantry crane to the PLC controller, the PLC controller judges whether the gantry crane has deviation in the operation process by analyzing the change of the angular displacement of the travelling wheels at two sides, if the deviation occurs, the PLC controller controls the travelling wheels at two sides to correct the deviation of the gantry crane, and the setting of the deviation correcting device fully ensures the stability of the operation of the gantry crane, the potential safety hazard is reduced.

Description

Gantry crane with deviation correcting device

Technical Field

The utility model relates to a gantry crane technical field, concretely relates to gantry crane with deviation correcting device.

Background

With the great application of the portal crane in engineering construction, supporting leg traveling wheels and bearings are all quick-wear parts, but the original frequently-adopted box body structure is troublesome to replace, the original shaft-mounting traveling box body structure is that a round hole with the same diameter as that of a traveling wheel shaft is formed in a side plate of the box body, when the bearing needs to be replaced, the wheel shaft needs to be driven to the other side from one side of the traveling box body along the horizontal direction, and the wheel shaft is very difficult to disassemble and assemble due to the fact that the bearing rear wheel shaft and the box body are deformed.

In recent years, large-span portal cranes are widely applied to national engineering construction, and the problem of deviation of a travelling mechanism on a supporting leg due to the fact that the left side and the right side of the supporting leg of the large-span portal crane are asynchronous becomes more and more serious. In order to solve the potential safety hazard caused by the asynchronism of the left side and the right side of the landing leg of the large-span portal crane, innovation needs to be made on a crane walking mechanism.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a gantry crane with deviation correcting device sets up the mechanism of rectifying on the running gear of hoist both sides, rectifies the running gear when skew appears in the hoist both sides.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a gantry crane with deviation correcting device, includes running gear and PLC controller, running gear includes the walking wheel case, the front end of walking wheel case is provided with the crash bar and rectifies the case, it installs the axis of rotation to rotate on the lateral wall of case to rectify, key connection has the measuring wheel in the axis of rotation, the axis of rotation stretches out the one end of rectifying the case lateral wall and the pivot fixed connection of encoder, encoder and running gear all are connected with the PLC controller electricity, the case of rectifying sets up the below at the crash bar, the articulated front end of connecting at the walking wheel case of rectifying, fixedly connected with spring between the top of case of rectifying and the bottom of crash bar, the spring is in compression state all the time.

As a further aspect of the present invention: the travelling wheel box is provided with a top plate, two webs extending downwards are arranged on two sides of the top plate, two U-shaped grooves are symmetrically formed in the two webs, openings of the U-shaped grooves extend in the direction away from the top plate, a bearing is clamped in the U-shaped grooves, a travelling wheel shaft is fixedly mounted in an inner ring of the bearing, and a travelling wheel is fixedly connected to the travelling wheel shaft.

As a further aspect of the present invention: the U-shaped inslot joint has the backup pad, the backup pad top surface and the outer peripheral face butt of bearing outer ring.

As a further aspect of the present invention: first threaded holes are formed in webs on two sides of the U-shaped groove, the supporting plate is a T-shaped plate, the T-shaped plate is composed of a longitudinal plate parallel to the walking wheel shaft and a transverse plate perpendicular to the longitudinal plate, the longitudinal plate is clamped in the U-shaped groove, and the transverse plate is connected with the webs of the walking wheel box through bolts.

As a further aspect of the present invention: the rotating shaft is connected with the rotating shaft of the encoder through a spiral coupler.

The utility model has the advantages that:

1. through being connected the encoder pivot with the axis of rotation of measuring wheel, the encoder gives the PLC controller with the data transfer of the angle displacement of the walking wheel of gantry crane both sides, the PLC controller judges whether the skew has appeared at the operation in-process of gantry crane through the change of the angle displacement of the walking wheel of analysis both sides, if the skew appears, the motion of walking wheel is taken turns to gantry crane to the PLC controller control both sides, deviation correcting device's setting has fully guaranteed the stability of gantry crane operation, potential safety hazard has been reduced.

2. The wheel shaft of the travelling wheel is fixed in the U-shaped groove of the web plate of the travelling wheel box, the wheel shaft is further fixed by the supporting plate connected to the web plate through the bolt, the travelling wheel is reliably connected with the portal crane when in use, when the travelling wheel needs to be replaced and maintained, the wheel shaft can be conveniently taken down only by taking down the supporting plate, adverse effects on other parts such as the travelling wheel box can not be caused when the wheel shaft is taken down, and the mounting and dismounting efficiency of the travelling wheel is improved.

Drawings

The present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic side view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the connecting structure of the traveling wheel box and the crash bar of the present invention;

FIG. 3 is a schematic view of the cross-sectional structure of the measuring wheel box of the present invention;

fig. 4 is a schematic top view of the support plate of the present invention.

In the figure: 1. a measuring wheel; 2. a helical coupling; 3. an encoder; 4. a rotating shaft; 5. a spring; 6. a running wheel axle; 7. a support plate; 8. an anti-collision rod; 9. a traveling wheel box; 10. a deviation rectifying box; 11. a PLC controller; 12. a U-shaped groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention relates to a gantry crane with a deviation correcting device, which comprises a traveling mechanism and a PLC controller 11, wherein the traveling mechanism comprises a traveling wheel box 9, the front end of the traveling wheel box 9 is provided with an anti-collision rod 8 and a deviation correcting box 10, the side wall of the deviation correcting box 10 is rotatably provided with a rotating shaft 4, the rotating shaft 4 is connected with a measuring wheel 1 by a key, one end of the rotating shaft 4 extending out of the side wall of the deviation correcting box 10 is fixedly connected with the rotating shaft of an encoder 3, the encoder 3 records the distance traveled by the measuring wheel 1 and converts the distance parameter into a digital signal, the encoder 3 and the traveling mechanism are both electrically connected with the PLC controller 11, the PLC controller 11 receives the rotating signal of the traveling mechanism of the encoder 3, compares the difference of the distance traveled by the measuring wheels 1 at both sides and compares the traveling data of the traveling wheels, whether the deviation occurs in the walking process of the portal crane is judged, the deviation rectifying box 10 is arranged below the anti-collision rod 8, the deviation rectifying box 10 is hinged to the front end of the walking wheel box 9, the spring 5 is fixedly connected between the top of the deviation rectifying box 10 and the bottom of the anti-collision rod 8, the spring 5 is always in a pressed state, the pressed spring 5 can guarantee that the measuring wheel 1 is always abutted to the rail surface, and the accuracy in measurement of the measuring wheel 1 is guaranteed.

The traveling wheel box 9 is provided with a top plate, two sides of the top plate are respectively provided with a web plate extending downwards, two U-shaped grooves 12 are symmetrically formed in the two web plates, the openings of the U-shaped grooves 12 extend towards the direction away from the top plate, bearings are clamped in the U-shaped grooves 12, traveling wheel shafts 6 are fixedly mounted in inner rings of the bearings, traveling wheels are fixedly connected to the traveling wheel shafts 6, and the U-shaped grooves 12 are convenient to mount and dismount.

The U-shaped groove 12 is internally clamped with a supporting plate 7, the top surface of the supporting plate 7 is abutted to the outer peripheral surface of the bearing outer ring, and the supporting plate 7 is used for fixing the bearing in the U-shaped groove 12, so that looseness and deviation of the bearing and a walking wheel caused by vibration of running of the crane are avoided.

The supporting plate 7 is a T-shaped plate, the T-shaped plate is composed of a longitudinal plate parallel to the walking wheel shaft 6 and a transverse plate perpendicular to the longitudinal plate, the longitudinal plate is clamped in the U-shaped groove 12, the transverse plate is fixedly connected to a web plate of the walking wheel box 9 through a bolt, the supporting plate 7 can also be an H-shaped plate, an arc-shaped groove is formed in the top surface of the supporting plate 7, and the shape of the arc-shaped groove is matched with that of a bearing arc in the U-shaped groove 12.

The rotating shaft 4 is connected with the rotating shaft of the encoder 3 through the spiral coupler 2.

The working principle is as follows: when the various reasons of the gantry crane left and right sides running gear of large-span are asynchronous, the difference can appear in the angle displacement of the measuring wheel 1 of both sides, encoder 3 measures and takes notes measuring wheel 1 in the angle displacement of rotation process, when the angle displacement that two encoders 3 take notes is different, can regard as the running gear of gantry crane both sides landing leg displacement deviation to appear, PLC controller 11 receives behind the signal of displacement deviation, to the running gear of both sides send control signal, correct running gear, ensure gantry crane even running, avoid the potential safety hazard that the asynchronous of gantry crane left and right sides landing leg arouses. The deviation rectifying box 10 is hinged to the traveling wheel box 9 through a pin shaft, in the rotating process of the measuring wheel 1 on the track, the measuring wheel 1 cannot bounce due to the fact that the track surface is not straight, and is disconnected from the track temporarily, but the spring 5 abuts against the anti-collision rod 8, so that the measuring wheel 1 can be guaranteed to be in contact with the track surface all the time, and the measuring error of the encoder 3 is reduced.

When the walking wheel of portal crane needs to be changed, unscrew the bolt earlier, take off backup pad 7 from the walking case, take out walking shaft 6 from U-shaped groove 12 with the instrument afterwards, mainly take out the bearing in U-shaped groove 12 from U-shaped groove 12, after taking out bearing and walking shaft 6, it is more convenient when taking off walking wheel, bearing from walking shaft 6 afterwards.

The foregoing is illustrative and explanatory of the structure of the invention, and it is intended that those skilled in the art who have the structure described herein be able to make various modifications, additions or substitutions thereto, without departing from the scope of the invention as defined in the claims.

Claims

1. A portal crane with a deviation correcting device comprises a traveling mechanism and a PLC (programmable logic controller) (11), wherein the traveling mechanism comprises a traveling wheel box (9), an anti-collision rod (8) and a deviation correcting box (10) are arranged at the front end of the traveling wheel box (9), a rotating shaft (4) is rotatably installed on the side wall of the deviation correcting box (10), a measuring wheel (1) is connected to the rotating shaft (4) in a key mode, an encoder (3) is fixedly connected to one end, extending out of the side wall of the deviation correcting box (10), of the rotating shaft (4), the encoder (3) and the traveling mechanism are both electrically connected with the PLC (11), the gantry crane is characterized in that the deviation correcting box (10) is arranged below the anti-collision rod (8), the deviation correcting box (10) is hinged to the front end of the traveling wheel box (9), a spring (5) is fixedly connected between the top of the deviation correcting box (10) and the bottom of the anti-collision rod (8), the spring (5) is always in a pressed state.

2. The gantry crane with the deviation correcting device is characterized in that the travelling wheel box (9) is provided with a top plate, two sides of the top plate are respectively provided with a web plate extending downwards, two U-shaped grooves (12) are symmetrically formed in the two web plates, the opening of each U-shaped groove (12) extends in the direction away from the top plate, a bearing is clamped in each U-shaped groove (12), a travelling wheel shaft (6) is fixedly mounted in an inner ring of each bearing, and travelling wheels are fixedly connected to the travelling wheel shafts (6).

3. The gantry crane with the deviation correcting device according to claim 2, wherein a supporting plate (7) is clamped in the U-shaped groove (12), and the top surface of the supporting plate (7) is abutted to the outer peripheral surface of the bearing outer ring.

4. The gantry crane with the deviation correcting device is characterized in that the supporting plate (7) is a T-shaped plate, the T-shaped plate is composed of a longitudinal plate parallel to the axis of the traveling wheel shaft (6) and a transverse plate perpendicular to the longitudinal plate, the longitudinal plate is clamped in the U-shaped groove (12), and the transverse plate is fixedly connected with a web plate of the traveling wheel box (9) through a bolt.

5. Gantry crane with a deviation correction device according to claim 1, characterized in that the rotating shaft (4) and the shaft of the encoder (3) are connected to each other by a screw coupling (2).