CN110937503B - Device and method for freely changing site of trackless portal crane - Google Patents
Device and method for freely changing site of trackless portal crane Download PDFInfo
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- CN110937503B CN110937503B CN201911217490.XA CN201911217490A CN110937503B CN 110937503 B CN110937503 B CN 110937503B CN 201911217490 A CN201911217490 A CN 201911217490A CN 110937503 B CN110937503 B CN 110937503B
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- wheels
- support
- tyre
- portal crane
- oil cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/08—Runners; Runner bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/10—Undercarriages or bogies, e.g. end carriages, end bogies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
The invention provides a device and a method for freely changing a field of a trackless portal crane, which comprises a movable bottom vehicle, a plurality of positioning and supporting devices, the movable bottom vehicle comprises a frame arranged on the bottom surface of a leg part of the portal crane and wheels arranged at the front and rear parts of two side edges of the frame, the wheels are respectively provided with a driving device, the tire treads of the wheels are provided with convex one-way rotary patterns, the rotary directions of the tyre patterns of the adjacent wheels of the four wheels are opposite, the positioning and supporting devices comprise oil cylinders and supports, the supports are arranged at the bottom parts of the side walls of the leg part of the portal crane, and the oil cylinders are arranged on the supports and are vertical to the. The device can make the gantry crane move along the arbitrary direction of place plane in the place at place, full play gantry crane's effect, create the biggest benefit.
Description
Technical Field
The invention belongs to the field of portal cranes, and particularly relates to a device and a method for freely changing a field of a trackless portal crane.
Background
Publicly know, gantry crane generally divide into four legs, can only rely on the iron wheel of shank bottom to move on track bulk motion during the removal, and among the prior art, when gantry crane changed the place, often need follow a set of track and remove to another group track on, but can't break away from orbital constraint all the time, because orbital restriction makes gantry crane's removal scope very limit, very big reduction production efficiency. In order to improve the moving efficiency of the portal crane, a moving method with one side fixed and the other side moving around the fixed side to form a circular moving range is adopted, so that the working efficiency of the portal crane is improved to a certain extent, but the portal crane cannot be flexibly used.
Disclosure of Invention
The invention aims to provide a device for freely switching a field of a trackless portal crane, which can enable the portal crane to move in the field along any direction of the field plane, fully play the function of the portal crane and create the maximum benefit.
Another object of the present invention is to provide a site conversion method of the above apparatus.
In order to achieve the purpose, the technical scheme of the invention is as follows: a device for freely changing a field of a trackless portal crane comprises a movable bottom car and a plurality of positioning and supporting devices,
the movable bottom car comprises a frame arranged on the bottom surface of the leg of the portal crane, wheels arranged at the front and rear parts of two side edges of the frame, the wheels on the two side edges are symmetrically arranged, the wheels are respectively provided with a driving device, the tire tread of each wheel is provided with a raised tread which is a unidirectional rotary pattern, the rotary directions of the treads of the adjacent wheels of the four wheels are opposite,
the positioning and supporting device comprises an oil cylinder and a support, wherein the support is arranged at the bottom of the side wall of the leg of the portal crane, the oil cylinder is arranged on the support and is perpendicular to the ground, a supporting seat in contact with the ground is arranged at the top end of a piston rod of the oil cylinder, and the oil cylinder is used for supporting the leg of the portal crane to enable wheels of the moving bottom car to be off the ground.
The positioning and supporting devices are two or four symmetrically arranged.
The unidirectional spiral lines are left-handed spiral lines or right-handed spiral lines.
The unidirectional spiral grains are obliquely arranged in the form of convex tyre grains, and the included angle between the unidirectional spiral grains and the central line of the tyre surface is 20-70 degrees.
The included angle between the tyre thread of the unidirectional spiral thread and the central line of the tyre surface is 45 degrees.
The shape of the unidirectional spiral pattern is linear.
The support comprises an upper support, a lower support and a positioning clamping seat, wherein the upper support and the lower support are parallelly installed at the bottom of the side wall of the leg of the portal crane, the bottom of an oil cylinder is hinged to the upper support, the positioning clamping seat is detachably and fixedly connected with the lower support, and a clamping groove is formed in the positioning clamping seat and used for fixing the head of the oil cylinder.
The device for freely converting the field of the trackless portal crane can realize trackless movement of the portal crane, greatly improve the range of motion of the portal crane and improve the working efficiency.
A method for freely changing a field of a trackless portal crane comprises the following steps,
step 2, installing a positioning support device on the symmetrical surface of the bottoms of four legs of the crane, wherein the positioning support device comprises an oil cylinder and a support, the support is installed at the bottom of the side wall of the leg of the portal crane, the oil cylinder is installed on the support and is vertical to the ground, a support seat which is contacted with the ground is arranged at the top end of a piston rod of the oil cylinder, a piston of the oil cylinder extends out to support the crane, wheels of a moving bottom car are lifted off the ground, and the in-situ positioning of the crane is completed,
step 3, moving the crane, recovering the oil cylinder piston, moving the wheels of the chassis to the ground, adopting a moving mode until reaching the required position, wherein the moving mode comprises,
a) the driving devices of all wheels of the moving chassis rotate in the same direction and move in the rotating direction to finish the forward and backward movement,
b) the front wheel driving device and the rear wheel driving device on the same side of the moving bottom car reversely rotate, the rotation direction of the wheel driving device on the opposite side is the same as that of the symmetrical wheels, the left and right movement is completed,
c) the angular movement may be performed in a manner such that the movement modes a and b are alternately and cyclically performed.
The field conversion method of the invention enables the gantry crane to move conveniently and quickly, avoids the constraint of the track and greatly improves the working efficiency.
Drawings
Fig. 1 is a schematic view of the present invention in use.
FIG. 2 is a schematic view of the structure of the mobile chassis of the present invention.
FIG. 3 is a schematic structural view of the mobile chassis and the positioning support device of the present invention.
FIG. 4 is a diagram of the force analysis of the right tire tread of the wheel of the present invention.
FIG. 5 is a graph of the force analysis of the left tire tread of the wheel of the present invention.
FIG. 6 is an analysis diagram of the X-axis movement stress of the moving bed vehicle of the present invention.
FIG. 7 is a graph illustrating the force analysis of the y-axis movement of the mobile cart according to the present invention.
Detailed Description
As shown in fig. 1-3, the device for freely changing the ground of the trackless portal crane comprises a movable bottom carriage 1, a positioning and supporting device,
the movable bottom vehicle comprises a frame 11 arranged on the bottom surface of a leg of the portal crane, wheels 12 arranged at the front and rear parts of two side edges of the frame, wherein the wheels on the two side edges are symmetrically arranged, the wheels are respectively provided with a driving motor 13, and raised tyre threads are arranged on tyre treads of the wheels; taking the right-handed spiral pattern as an example, the tire is laid down, the left bottom and the right height of the convex tire pattern or the concave tire mark are right handed, the inclination angle range of the tire is 20 degrees to 70 degrees, when the angle is 45 degrees, the efficiency of a free conversion field is highest, the one-way spiral pattern is linear, the tire can directly penetrate through the whole tire tread, and can also be broken in the middle, as long as the whole trend of the tire spiral pattern is right handed. And the left-handed spiral pattern is opposite. When the angle is deviated by 45 degrees, the efficiency of forward and backward movement is better than the efficiency of left and right movement or the efficiency of left and right movement is better than the efficiency of forward and backward movement when the angle is larger, wherein the better movement efficiency is better than that when the angle is 45 degrees.
The device of the invention adopts novel tire patterns to achieve the purpose of the invention, the driving mode of the wheels is different from that of the traditional vehicle, each wheel is provided with a driving motor, and the purpose of movement is achieved by positive and negative rotation of an electric control adjusting motor.
Positioning support device, including hydro-cylinder 21, a support, the support includes upper bracket 22, lower carriage 23, location cassette 24, it is upper, lower carriage parallel mount is in gantry crane shank lateral wall bottom, the articulated upper bracket 22 in the bottom of hydro-cylinder 21 jar, location cassette 24 passes through bolt fixed connection with the lower carriage, be provided with the draw-in groove on the location cassette 24, be used for fixed cylinder head, the hydro-cylinder is installed on the support, perpendicular with ground, the top of the piston rod of the hydro-cylinder is provided with the supporting seat 25 with ground contact, hydro-cylinder 21 is used for supporting the portal crane shank of place, make and remove end car wheel liftoff.
When the gantry crane is used, the movable bottom car is used for enabling the gantry crane to move in any direction along a field plane on a field, the positioning and supporting device is used for locking the gantry crane at an appointed position, and when the gantry crane is locked, the oil cylinder supporting seat is in contact with the ground, and wheels of the movable bottom car are separated from the ground; and vice versa when moving.
4-5 the wheel used in the invention is specially designed, the tyre tread of the tyre is left-handed and right-handed, the wheel is subjected to stress analysis to further surface the advantages of the invention, the force of the wheel on the ground is F, the force of the ground on the wheel is F, and when the device is moved, we only need to pay attention to F, which is the driving force for driving the portal crane leg moving device to move. The driving force f for driving the device is not the same as the driving direction of the portal crane or the vertical driving direction of the portal crane. Instead, the resultant of the driving force f1 of the device of the invention and the force f2 in the vertical direction of travel, i.e. the driving force f of the device of the invention can be divided into the same driving force f1 in the direction of travel of the device of the invention and the force f2 in the vertical direction of travel of the device of the crane gate leg.
The wheel drive force analysis is as follows, with the wheels being A, B, C, D in the clockwise direction as viewed in fig. 6-7.
Forward, i.e., the wheel A, B, C, D rolls forward in the x-axis direction, the driving force f of the wheel a is divided into left f2 and forward f1, the driving force f of the wheel B is divided into right f2 and forward f1, the driving force f of the wheel C is divided into left f2 and forward f1, and the driving force f of the wheel D is divided into right f2 and forward f 1. Wherein f2 of the left wheel a is balanced with f2 of the right wheel D, wherein f2 of the left wheel C is balanced with f2 of the right wheel B, so that only four forward driving forces f1 remain, and the gantry leg moving device moves forward, i.e. in the x-axis direction.
The lateral movement, i.e., the rotation of the wheel A, B, C, D in the y-axis direction, the driving force f of the wheel a is divided into f1 to the right and f2 to the back, the driving force f of the wheel B is divided into f1 to the right and f2 to the front, the driving force f of the wheel C is divided into f1 to the right and f2 to the back, and the driving force f of the wheel D is divided into f1 to the right and f2 to the front. Wherein f2 of the wheel A backward balances with f2 of the wheel B forward, wherein f2 of the wheel C backward balances with f2 of the wheel D forward, so that only four driving forces f1 to the right are left, and the portal crane leg moving device moves to the right, namely moves along the y-axis direction.
When the gantry crane support leg moving device moves towards an angle, the principle is that the gantry crane support leg moving device moves for a plurality of circles along the direction of an x axis and moves for a plurality of circles along the direction of a y axis, namely the gantry crane support leg moving device moves along the direction formed by the x axis and the y axis.
Claims (6)
1. The utility model provides a device on trackless portal crane free switching place which characterized in that: comprises a movable bottom vehicle and a plurality of positioning and supporting devices,
the movable bottom car comprises a frame arranged on the bottom surface of a leg of the portal crane, wheels arranged at the front and rear parts of two side edges of the frame, the wheels on one side edge and the wheels on the other side edge are symmetrically arranged, the wheels are respectively provided with a driving device, the tire tread of each wheel is provided with a raised tyre grain, the raised tyre grain is a one-way spiral grain, the tyre grain rotary directions of adjacent wheels are opposite, the raised tyre grain of the one-way spiral grain is obliquely arranged, the included angle between the raised tyre grain and the central line of the tire tread is 20-70 degrees, the tyre grain of the one-way spiral grain is linear in shape, the portal crane moves forwards or backwards, the driving devices of all the wheels of the movable bottom car rotate in the same direction and move towards the rotary direction, and the forward or backward movement is completed; the portal crane moves leftwards or rightwards, the front wheel driving device and the rear wheel driving device on the same side of the moving bottom car rotate reversely, the rotating direction of the wheel driving devices on the opposite side is the same as that of the symmetrical wheels, the left or right movement is completed,
the positioning and supporting device comprises an oil cylinder and a support, wherein the support is arranged at the bottom of the side wall of the leg of the portal crane, the oil cylinder is arranged on the support and is perpendicular to the ground, a supporting seat in contact with the ground is arranged at the top end of a piston rod of the oil cylinder, and the oil cylinder is used for supporting the leg of the portal crane to enable wheels of the moving bottom car to be off the ground.
2. The device for freely switching the field of a trackless gantry crane according to claim 1, wherein: the positioning and supporting devices are two or four symmetrically arranged.
3. The device for freely switching the field of a trackless gantry crane according to claim 1, wherein: the unidirectional spiral lines are left-handed spiral lines or right-handed spiral lines.
4. The device for freely switching the field of a trackless gantry crane according to claim 1, wherein: the included angle between the tyre thread of the unidirectional spiral thread and the central line of the tyre surface is 45 degrees.
5. The device for freely switching the field of a trackless gantry crane according to claim 1, wherein: the support comprises an upper support, a lower support and a positioning clamping seat, wherein the upper support and the lower support are parallelly installed at the bottom of the side wall of the leg of the gantry crane, the bottom of an oil cylinder is hinged to the upper support, the positioning clamping seat is detachably and fixedly connected with the lower support, and a clamping groove is formed in the positioning clamping seat and used for fixing the head of the oil cylinder.
6. A method for freely changing a field of a trackless portal crane is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step 1, installing a movable bottom car at the bottoms of four legs of a portal crane, arranging wheels at the front part and the rear part of two side edges of a frame of the movable bottom car symmetrically, arranging driving devices on the wheels respectively, arranging convex tyre lines on tyre surfaces of the wheels, wherein the convex tyre lines are unidirectional rotary lines, the rotary directions of the tyre lines of adjacent wheels are opposite,
step 2, installing a positioning support device on the symmetrical surface of the bottoms of the four legs of the portal crane, wherein the positioning support device comprises an oil cylinder and a support, the support is installed at the bottom of the side wall of the leg of the portal crane, the oil cylinder is installed on the support and is vertical to the ground, a support seat which is in contact with the ground is arranged at the top end of a piston rod of the oil cylinder, a piston of the oil cylinder extends out to support the portal crane, wheels of a moving bottom car are lifted off the ground, and the in-situ positioning of the portal crane is completed,
step 3, moving the gantry crane, recovering the oil cylinder piston, moving the wheels of the chassis to the ground, adopting a moving mode until reaching the required position, wherein the moving mode comprises,
a) and move forwards or backwards, the driving devices of all wheels of the moving chassis rotate in the same direction and move towards the rotating direction to finish the forward or backward movement,
b) the front wheel driving device and the rear wheel driving device on the same side of the moving bottom car reversely rotate, the rotation direction of the wheel driving device on the opposite side is the same as that of the symmetrical wheels, the left or right movement is completed,
c) the angular movement may be performed in a manner such that the movement modes a and b are alternately and cyclically performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911217490.XA CN110937503B (en) | 2019-12-03 | 2019-12-03 | Device and method for freely changing site of trackless portal crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911217490.XA CN110937503B (en) | 2019-12-03 | 2019-12-03 | Device and method for freely changing site of trackless portal crane |
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| CN110937503A CN110937503A (en) | 2020-03-31 |
| CN110937503B true CN110937503B (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911217490.XA Active CN110937503B (en) | 2019-12-03 | 2019-12-03 | Device and method for freely changing site of trackless portal crane |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325819A (en) * | 1998-11-30 | 2001-12-12 | 三星重工业株式会社 | Traveller with trolley |
| CN1428290A (en) * | 2001-12-26 | 2003-07-09 | 上海振华港口机械股份有限公司 | Tyre type gantry container crane large vehicle walking wheel hydraulic lifting and steering device |
| CN103803423A (en) * | 2012-11-14 | 2014-05-21 | 上海市闵行区知识产权保护协会 | Lifting machine |
| CN107352446A (en) * | 2017-09-13 | 2017-11-17 | 河南省三轩起重机械有限公司 | Liftable trackless portal crane |
-
2019
- 2019-12-03 CN CN201911217490.XA patent/CN110937503B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325819A (en) * | 1998-11-30 | 2001-12-12 | 三星重工业株式会社 | Traveller with trolley |
| CN1428290A (en) * | 2001-12-26 | 2003-07-09 | 上海振华港口机械股份有限公司 | Tyre type gantry container crane large vehicle walking wheel hydraulic lifting and steering device |
| CN103803423A (en) * | 2012-11-14 | 2014-05-21 | 上海市闵行区知识产权保护协会 | Lifting machine |
| CN107352446A (en) * | 2017-09-13 | 2017-11-17 | 河南省三轩起重机械有限公司 | Liftable trackless portal crane |
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| Publication number | Publication date |
|---|---|
| CN110937503A (en) | 2020-03-31 |
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