CN111362135A - Crane jacking mechanism and working process thereof - Google Patents

Crane jacking mechanism and working process thereof Download PDF

Info

Publication number
CN111362135A
CN111362135A CN202010135413.6A CN202010135413A CN111362135A CN 111362135 A CN111362135 A CN 111362135A CN 202010135413 A CN202010135413 A CN 202010135413A CN 111362135 A CN111362135 A CN 111362135A
Authority
CN
China
Prior art keywords
clamping
jacking
oil cylinder
main shaft
crane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010135413.6A
Other languages
Chinese (zh)
Inventor
李万录
程兆辉
赵旭
潘雷涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan Heavy Industry Co Ltd
Original Assignee
Taiyuan Heavy Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan Heavy Industry Co Ltd filed Critical Taiyuan Heavy Industry Co Ltd
Priority to CN202010135413.6A priority Critical patent/CN111362135A/en
Publication of CN111362135A publication Critical patent/CN111362135A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/18Travelling gear incorporated in or fitted to trolleys or cranes with means for locking trolleys or cranes to runways or tracks to prevent inadvertent movements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25Constructional features
    • B66F3/42Constructional features with self-contained pumps, e.g. actuated by hand
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003Systems with load-holding valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00Circuits for servomotor systems
    • F15B2211/30Directional control
    • F15B2211/305Directional control characterised by the type of valves
    • F15B2211/3056Assemblies of multiple valves

Abstract

The invention discloses a crane jacking mechanism and a working principle thereof, and the crane jacking mechanism comprises four jacking devices and a hydraulic system, wherein each jacking device comprises: a jacking oil cylinder, two clamping oil cylinders and a clamping jaw. The first cylinder body of the jacking oil cylinder is arranged on the crane, and the first main shaft is located below the first cylinder body and vertically downward. Two second cylinder bodies of the clamping oil cylinders are symmetrically connected to the head of the first main shaft, the second main shafts of the two clamping oil cylinders face opposite directions and are collinear in axis, the second main shafts of the two clamping oil cylinders are perpendicular to the axis of the first main shaft of the jacking oil cylinder, and a T-shaped structure is formed by the second main shafts and the first main shaft. The number of the clamping jaws is two, each clamping jaw corresponds to one second main shaft, and each clamping jaw is connected to the end part of the corresponding second main shaft and used for clamping the track under the driving of the clamping oil cylinder. The hydraulic system is used for controlling and driving the jacking oil cylinder and the clamping oil cylinder to act. The crane jacking mechanism and the working process thereof are safe and stable, reduce labor intensity and can resist wind, prevent skidding and anchor the crane.

Description

Crane jacking mechanism and working process thereof
Technical Field
The invention relates to the technical field of cranes, in particular to a crane jacking mechanism and a working process thereof.
Background
When the wheel of the crane is replaced or maintained, the crane needs to be lifted to a certain height, and the wheel is kept in a suspended state so as to maintain or replace the wheel.
As shown in fig. 1, in the prior art, when a crane is lifted, a jack is generally placed on a rail bearing beam to lift the crane, and a cushion block is arranged at the top or bottom of the jack so as to adapt to the lifting height. The crane can incline when being lifted, so the contact between the crane and the jack or the cushion block is point contact or line contact, and the rail bearing beam, the jack, the base plate and the crane are all simply put, so that the potential safety hazard of sliding or caving exists.
In addition, in the wind resistance and skid resistance of the crane in the prior art, the rotation of wheels of the crane is limited by a wind-proof iron wedge brake, a hydraulic top rail brake, a hydraulic wheel edge brake and the like, the rolling friction between the crane and a rail is converted into sliding friction, and the crane is prevented from sliding through friction resistance. However, the wind-resistant anti-skid means only prevents the crane from sliding through the blockage and the friction force of the wheels, and when the wind force is enough to overcome the blockage and the friction force, the crane starts to slide even if the wheels do not rotate, and the wind-resistant anti-skid means fails.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a crane jacking mechanism and a working process thereof. The specific technical scheme is as follows:
in a first aspect, a crane jacking mechanism is provided, the mechanism comprises four jacking devices and a hydraulic system, wherein each jacking device corresponds to a wheel set of a crane and keeps a preset distance with the corresponding wheel set; each of the jacking devices comprises: the lifting oil cylinder, the two clamping oil cylinders and the clamping jaw are arranged; the first cylinder body of the jacking oil cylinder is arranged on the crane, a first main shaft is positioned below the first cylinder body and vertically downward, the first cylinder body is the cylinder body of the jacking oil cylinder, and the first main shaft is the main shaft of the jacking oil cylinder; the two second cylinder bodies of the clamping oil cylinders are symmetrically connected to the head part of the first main shaft, the second main shafts of the two clamping oil cylinders face opposite directions, the axes of the two second main shafts are collinear, the two second main shafts are perpendicular to the axis of the first main shaft of the jacking oil cylinder, and a T-shaped structure is formed by the two second main shafts and the first main shaft; the second cylinder body is a cylinder body of the clamping oil cylinder, and the second main shaft is a main shaft of the clamping oil cylinder; the number of the clamping jaws is two, each clamping jaw corresponds to one second spindle, and each clamping jaw is connected to the end part of the corresponding second spindle and used for clamping a track under the driving of the clamping oil cylinder; and hydraulic elements in the hydraulic system are communicated with the jacking oil cylinders and the clamping oil cylinders in each jacking device through pipelines and accessories and are used for controlling and driving the jacking oil cylinders and the clamping oil cylinders to act.
In one possible design, an annular groove is formed in the first cylinder body, two semicircular rings with holes are installed in the annular groove, and the two semicircular rings are connected with a crane through bolt groups; the head of the first main shaft is provided with a threaded hole, the bottom of the second cylinder body is provided with an external thread, and the second cylinder body is screwed in and fixed in the threaded hole of the first main shaft in a threaded connection mode.
In one possible design, the clamping jaw comprises a connecting part, a jaw opening and a clamping jaw which are sequentially connected from top to bottom; the connecting portion of the clamping jaw is provided with a counter bore, the end portion of the second spindle is provided with a screw, and the screw at the end portion of the second spindle is inserted into the counter bore of the connecting portion of the clamping jaw and is assembled and fixed into a rigid body through a nut.
In one possible embodiment, the surface of the jaws and the claws is adapted to the cross section of the rail, and the surface of the jaws is toothed.
In one possible design, the hydraulic system includes: the hydraulic control system comprises an oil tank, a main pump group, a pressure regulating valve group, a first multi-way valve group, a second multi-way valve group, a pressure sensor and a hydraulic lock; the pressure regulating valve group is connected with the main pump group, the main pump group is communicated with the jacking oil cylinder through the first multi-way valve group, and the main pump group is communicated with the clamping oil cylinder through the second multi-way valve group; the pressure regulating valve group is combined with the main pump group, the first multi-way valve group and the second multi-way valve group and respectively controls the actions of the jacking oil cylinder and the clamping oil cylinder; the oil tank is respectively communicated with the main pump group, the pressure regulating valve group, the first multi-way valve group and the second multi-way valve group; the hydraulic lock is arranged between the second multi-way valve group and the clamping oil cylinder and used for locking the clamping oil cylinder for pressure maintaining.
In one possible design, pressure sensors are respectively arranged on the first multi-way valve group and the jacking oil cylinder; and a pressure sensor is arranged in the second multi-way valve group.
In one possible design, the end of the first spindle has a circular arc structure.
In a second aspect, a working process of a crane lifting mechanism is provided, the working process of the crane lifting mechanism for lifting a crane includes:
the hydraulic system drives and controls the jacking oil cylinder to act, and the first main shaft extends downwards to be in contact with the track;
the hydraulic system drives and controls the clamping oil cylinder to act, and the second main shaft drives the two clamping jaws to move oppositely to center and clamp the track; after the two clamping jaws clamp the track, the hydraulic lock locks the clamping oil cylinder for pressure maintaining;
the hydraulic system drives and controls the jacking oil cylinder to act, and the first main shaft continues to extend downwards to enable the crane to jack to a preset height.
In one possible design, the work process of anchoring the crane by the crane jacking mechanism comprises the following steps:
the hydraulic system drives and controls the four jacking devices to synchronously act;
the hydraulic system drives and controls the jacking oil cylinder to act, and the first main shaft extends downwards to be in contact with the track;
the hydraulic system drives and controls the clamping oil cylinder to act, the second main shaft drives the two clamping jaws to move oppositely to center the clamping rail, and after the two clamping jaws in each jacking device clamp the rail, the hydraulic lock locks the clamping oil cylinder for pressure maintaining.
In one possible design, the automatic centering operation of the two jaw pair tracks comprises:
under the working condition that the first main shaft is not aligned with the track, the two clamping jaws move oppositely, and one clamping jaw close to the track contacts the track firstly; the jaw which is firstly contacted with the track stops moving, the other jaw continues to move towards the track under the driving of the second main shaft of the clamping oil cylinder until the other jaw is contacted with the track and stops moving, so that the two jaws finish the automatic centering of the track, the clamping of the track is realized, and the hydraulic lock locks the clamping oil cylinder for pressure maintaining.
The technical scheme of the invention has the following main advantages:
the crane jacking mechanism and the working process thereof can ensure that the jacking maintenance process is safer and more stable, compared with the prior art, the crane jacking mechanism is convenient to operate, saves jack carrying, multiple jacking operations and work of a base plate and a cushion block, and reduces the labor intensity. Meanwhile, the jacking mechanism can also resist wind, prevent skidding and anchor the crane.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a jacking structure provided in the prior art;
FIG. 2 is a schematic view of an orientation of a wheelset of a lift truck on a rail according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a single jacking device in the jacking mechanism of the crane according to an embodiment of the present invention;
FIG. 4 is a front view of a jacking cylinder in the jacking mechanism of a crane according to an embodiment of the present invention;
FIG. 5 is a side view of a jacking cylinder in a crane jacking mechanism according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a first cylinder in the crane jacking mechanism according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a semicircular ring in the lifting mechanism of the crane according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a clamping cylinder in a crane jacking mechanism according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a claw in a crane jacking mechanism according to an embodiment of the invention;
FIG. 10 is a schematic diagram of a hydraulic system of a crane jacking mechanism according to an embodiment of the present invention;
fig. 11 is a partially enlarged view of a first multi-way valve set in the crane lifting mechanism according to an embodiment of the present invention;
FIG. 12 is a partial enlarged view of a second multi-way valve set in the crane jacking mechanism according to an embodiment of the present invention;
fig. 13-1 to 13-6 are diagrams illustrating the operation of a single jacking device jacking crane in the crane jacking mechanism according to an embodiment of the present invention.
Description of reference numerals:
1-hydraulic system, 11-oil tank, 12-main pump group, 13-pressure regulating valve group, 14-first multi-way valve group, 15-second multi-way valve group, 16-hydraulic lock, 2-jacking oil cylinder, 21-first cylinder body, 211-annular groove, 212-semicircular ring, 22-first main shaft, 3-clamping oil cylinder, 31-second cylinder body, 32-second main shaft, 321-screw rod, 4-clamping jaw, 41-connecting part, 411-counter bore, 42-clamping jaw and 43-clamping jaw
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
In a first aspect, an embodiment of the present invention provides a crane lifting mechanism, as shown in fig. 2 to 12, the mechanism includes four lifting devices and a hydraulic system 1, each lifting device corresponds to a wheel set of a crane and maintains a preset distance with the corresponding wheel set, that is, the four lifting devices are respectively disposed near the four wheel sets of the crane. The jacking device comprises: the jacking oil cylinder 2, the clamping oil cylinder 3 and the clamping jaw 4; the first cylinder body 21 of the jacking oil cylinder 2 is connected to the crane through two semicircular rings 212 clamped into an annular groove 211 of the first cylinder body by bolts, a first main shaft 22 is positioned below the first cylinder body 21 and vertically downward, the first cylinder body 21 is the cylinder body of the jacking oil cylinder 2, and the first main shaft 22 is the main shaft of the jacking oil cylinder 2; the number of the clamping oil cylinders 3 is two, the two second cylinder bodies 31 are respectively connected to the first main shaft 22, the two second main shafts 32 face opposite directions, the axes are collinear, and are symmetrically arranged at the head of the first main shaft 22, the second cylinder bodies 31 are the cylinder bodies of the clamping oil cylinders 3, and the second main shafts 32 are the main shafts of the clamping oil cylinders 3; the number of the clamping jaws 4 is two, each clamping jaw 4 corresponds to one second main shaft 32, and each clamping jaw 4 is connected to the end part of the corresponding second main shaft 32 and used for clamping a track under the driving of the clamping oil cylinder 3; the hydraulic system 1 is respectively connected with the jacking oil cylinder 2 and the clamping oil cylinder 3 in each jacking device and is used for driving and controlling the actions of the jacking oil cylinder 2 and the clamping oil cylinder 3.
The hydraulic system schematic diagram is shown in fig. 10 to 12. The hydraulic system 1 mainly includes: the hydraulic system comprises an oil tank 11, a main pump group 12, a pressure regulating valve group 13, a first multi-way valve group 14, a second multi-way valve group 15, a hydraulic lock 16, a pressure sensor and the like, wherein the parts are connected through pipelines and accessories to form a complete hydraulic system.
The pressure regulating valve group 13 is combined with the first multi-way valve group 14 and the pressure sensor to control the start and stop of the action of the jacking oil cylinder 2; the pressure regulating valve group 13 is combined with the second multi-way valve group 15 and the pressure sensor to control the start and stop of the action of the clamping oil cylinder 3; and the hydraulic lock 16 is arranged between the second multi-way valve group 15 and the clamping oil cylinder 3 and is used for locking the clamping oil cylinder 3 for pressure maintaining. The pipeline connected with the clamping oil cylinder 3 is a high-pressure hose so as to remove the restraint between adjacent pipe fittings and avoid the pipeline from being broken.
An interlock button (not shown in the figure) is further arranged in the hydraulic system 1 and used for locking the crane running mechanism and the hoisting mechanism and ensuring the safety of personnel operation or the crane during the wheel maintenance, replacement or anchoring period of the crane.
As shown in fig. 4 to 7, the first cylinder 21 is provided with an annular groove 211, two semicircular rings 212 with holes are installed in the annular groove 211, and the two semicircular rings 212 are connected with a bolt for a crane, so that the jacking cylinder 2 can be conveniently installed and detached.
As shown in fig. 4 and 5, the head of the first main shaft 22 of the jacking cylinder 2 is provided with a threaded hole, as shown in fig. 8, the bottom of the second cylinder 31 of the clamping cylinder 3 is provided with an external thread, and as shown in fig. 3, the second cylinder 31 of the clamping cylinder 3 is connected with the first main shaft 22 in a thread pair manner to form a T-shaped structure. The design structure is simplest, the strength of the head part of the first main shaft 22 is improved, and the clamping oil cylinder 3 is convenient to mount, dismount and maintain; in order to avoid the bending deformation of the first main shaft 22 during the jacking process, the head of the first main shaft is designed into an arc structure, so that the reliability and the safety of the mechanism are improved.
As shown in fig. 8 and 9, the jaw 4 comprises a connecting portion 41, a jaw 42 and a jaw 43; two counter bores 411 are arranged on the connecting portion 41, and the counter bores 411 are respectively connected with the second main shaft 32 and the screw 321, so that the clamping jaws 4 and the second main shaft 32 form a pair of rigid bodies, and automatic centering and clamping of the clamping jaws 4 on the rails are realized.
The section of the jaw 42 and the jaw 43 of the jaw 4 is matched with the cross section of the track, and the surface of the jaw 42 is in a tooth shape, so that the friction force between the jaw 4 and the track can be increased, and the jaw is tightly combined with the track. The claws 43 limit the claws 4 to move upwards along the side surface of the track, so that the claws 4 can be prevented from sliding relative to the track in the jacking or anchoring process, and accidents caused by infirm clamping can be avoided.
The working process of the crane jacking mechanism provided by the embodiment of the invention is described as follows:
the four jacking devices are respectively positioned at the left front, the left back, the right front and the right back of the crane. The following only takes a single left-front jacking device as an example to explain the working process of the crane jacking mechanism:
as shown in fig. 13-1 to 13-6, in an initial state (13-1) → the main shaft 22 of the jacking cylinder 2 is extended and lowered → the head of the main shaft 22 is in contact with the rail (13-2) → the main shaft 32 of the clamping cylinder 3 moves oppositely → the claw 4 is driven to automatically center and clamp the rail (fig. 13-3 and 13-4) → the main shaft 22 of the jacking cylinder 2 is extended again, and the jacking crane rises to reach a required height and stops (fig. 13-5) → replacement and maintenance work is started. The replacement and maintenance are finished and the original state is returned to (fig. 13-6) in the reverse order.
When the crane jacking mechanism jacks the crane, the hydraulic system 1 drives and controls the jacking oil cylinder 2 to act, and the first main shaft 22 extends downwards to be in contact with the track; the hydraulic system 1 drives and controls the clamping oil cylinder 3 to act, and the two second main shafts 32 drive the two clamping jaws 4 to move oppositely to clamp the track; the hydraulic system 1 drives and controls the jacking oil cylinder 2 to act again, and the first main shaft 22 continues to extend downwards until the crane is jacked to the preset height.
It can be understood that only need make the maintenance wheel place with two jacking devices of one side move simultaneously can, for example, can make left front, left back move simultaneously, overhaul left wheel, also can make left front, right front move simultaneously, overhaul the wheel of front side.
The crane jacking mechanism can also anchor the crane, and the anchoring process comprises the following steps: the hydraulic system 1 drives and controls the four jacking devices to synchronously act, the hydraulic system 1 drives and controls the jacking oil cylinder 2 in each jacking device to act, and the first main shaft 22 extends downwards to be in contact with the track; the hydraulic system 1 drives and controls the clamping oil cylinder 3 to act, and after the two second main shafts 32 drive the two clamping jaws 4 to move oppositely to clamp the track, the clamping oil cylinder maintains pressure to enable the clamping jaws 4 to keep a clamping state all the time. It can be understood that the four jacking devices are put into use at the same time, so that the crane can keep balance and the anchoring effect is improved.
Therefore, the crane jacking mechanism provided by the embodiment of the invention can ensure that the jacking maintenance process is safer, more stable and more reliable, is convenient to operate compared with the prior art, saves jack transportation, multiple jacking operations and work of a base plate and a cushion block plug pad, reduces the labor intensity, and can resist wind, prevent skidding and anchor the crane.
Specifically, the working process of the crane jacking mechanism is described as follows by taking the left front jacking device as an example: and (3) pressing an interlocking button to lock the crane operation and hoisting mechanism and start the hydraulic system 1.
When the Y1 in the pressure regulating valve group 13 and the Y3a in the first multi-way valve group 14 are powered on, the first main shaft 22 of the left front jacking oil cylinder 2 extends outwards, and when the first main shaft 22 is in contact with the track and a pressure sensor corresponding to the jacking oil cylinder 2 reaches a set pressure P1, the Y1 and the Y3a are powered off, and the left front jacking oil cylinder 2 stops working; when a pressure sensor corresponding to the clamping oil cylinder 3 reaches a set pressure P3, the Y2 and the Y7b are de-energized, the clamping oil cylinder 3 stops working, and the hydraulic lock 16 locks the clamping oil cylinder 3 for pressure maintaining; and powering on Y1 and Y3a again, extending the first main shaft 22 of the left front jacking oil cylinder 2, lifting the jacking crane, and powering off Y1 and Y3a to stop working until the jacking oil cylinder 2 is jacked to the required position. And finishing the jacking work.
When the pressure regulating valve group 13 and the first multi-way valve group 14 are reset, the Y2 in the pressure regulating valve group 13 and the Y3b in the first multi-way valve group 14 are powered on, the first main shaft 22 of the left front jacking oil cylinder 2 contracts, the crane descends, when wheels (not shown in the figure) are in contact with a track, the pressure sensor reaches the set pressure P2, the Y2 and the Y3b are powered off, and the left front jacking oil cylinder 2 stops acting; the Y2 in the pressure regulating valve group 13 and the Y7a in the second multi-way valve group 15 are powered on, the hydraulic lock 16 is unlocked, the second main shaft 32 of the left front clamping oil cylinder 3 extends outwards, the jaw 4 is separated from the track until the second main shaft 32 of the clamping oil cylinder 3 does not act, and the Y2 and the Y7a are powered off; and powering on Y2 and Y3b again, and contracting the first main shaft 22 of the left front jacking oil cylinder 2 until the jacking oil cylinder 2 does not act, and powering off Y2 and Y3 b. And resetting the jacking mechanism. And then, the interlocking button is pressed, the interlocking of the mechanism is released, and the crane works normally.
In the crane jacking mechanism provided by the embodiment of the invention, two claws 4 can automatically center the track specifically: under the condition that the first main shaft 22 is not aligned with the track, the two claws 4 move towards each other, and one claw closer to the track contacts the track firstly. Because the oil inlet cavities and the oil outlet cavities of the two clamping oil cylinders 3 are communicated, the jaw 4 which is firstly contacted with the track stops moving, the other jaw 4 continues to move towards the track under the driving of the second main shaft 31 of the clamping oil cylinder 3 until being contacted with the track to stop moving, so that the two jaws 4 finish the automatic centering of the track, the clamping of the track is realized, and meanwhile, the hydraulic lock 16 locks the clamping oil cylinder 3 for pressure maintaining.
Specifically, for example, the left front jack is assumed to be displaced from the center of the first main shaft 22 by an arbitrary value E with reference to fig. 13. When the first main shaft 22 contacts with the track and the jacking oil cylinder 2 stops working, the Y2 in the pressure regulating valve group 13 and the Y7b in the second multi-way valve group 15 are electrified, the second main shaft 32 of the left front clamping oil cylinder 3 drives the clamping jaws 4 to move towards the track at a constant speed, and the left clamping jaws 4 firstly contact with the track and stop moving under the limitation of the track due to the deviation of the E value; because the oil paths of the two clamping oil cylinders 3 are communicated, the force applied to the track by the left clamping jaw 4 is small, at the moment, the right clamping oil cylinder 3 drives the right clamping jaw 4 to continuously move leftwards until the right clamping oil cylinder contacts with the track to stop moving, the centering process is ended, the clamping of the track is realized, and meanwhile, the hydraulic lock 16 locks the clamping oil cylinders 3 for pressure maintaining.
When anchoring, taking the jacking device positioned at the front left as an example, when the jaw 4 completes automatic centering on the center of the track, the head of the track is positioned in the surrounding of the first main shaft 22, the jaw 42 and the jaw 43, then the pressure of an oil path is gradually increased, when the pressure sensor reaches the set pressure P3, the Y2 and the Y7b are de-energized, the clamping oil cylinder 3 stops working, and the hydraulic lock 16 locks the clamping oil cylinder for pressure maintaining. To this end, the main shaft 22, the jaw 42 and the jaw 43 are tightly combined with the rail to form a rigid body, thereby playing the roles of wind resistance, skid resistance and crane anchoring.
The hydraulic system of the crane jacking mechanism can drive and control any combination of four jacking devices, the left front jacking device is taken as an example to describe the working process of the crane jacking mechanism, the driving and the control of other combination modes of the jacking devices are similar to the left front jacking device, only the combination of the valve body and the hydraulic element in the pressure regulating valve group 13 and the first multi-way valve group 14 or the second multi-way valve group 15 is different, and the description is omitted herein.
In summary, the crane jacking mechanism and the working process thereof provided by the embodiment of the invention have the following beneficial effects:
1. the crane can be jacked to overhaul or replace wheels. 2. The device can be used as a rail clamping device and an anchoring device, and can resist wind, prevent skidding and anchor the crane at any position of the full stroke of the crane. 3. The clamping jaw has an automatic centering function on the center of the track. 4. The using process is safe and stable. 5. The operation is convenient, the jack carrying, the multiple jacking operation and the cushion plate or cushion block filling work are omitted, and the labor intensity is reduced.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A crane jacking mechanism is characterized by comprising four jacking devices and a hydraulic system, wherein each jacking device corresponds to a wheel set of a crane and keeps a preset distance with the corresponding wheel set; each of the jacking devices comprises: the lifting oil cylinder, the two clamping oil cylinders and the clamping jaw are arranged;
the first cylinder body of the jacking oil cylinder is arranged on the crane, a first main shaft is positioned below the first cylinder body and vertically downward, the first cylinder body is the cylinder body of the jacking oil cylinder, and the first main shaft is the main shaft of the jacking oil cylinder;
the two second cylinder bodies of the clamping oil cylinders are symmetrically connected to the head part of the first main shaft, the second main shafts of the two clamping oil cylinders face opposite directions, the axes of the two second main shafts are collinear, the two second main shafts are perpendicular to the axis of the first main shaft of the jacking oil cylinder, and a T-shaped structure is formed by the two second main shafts and the first main shaft; the second cylinder body is a cylinder body of the clamping oil cylinder, and the second main shaft is a main shaft of the clamping oil cylinder;
the number of the clamping jaws is two, each clamping jaw corresponds to one second spindle, and each clamping jaw is connected to the end part of the corresponding second spindle and used for clamping a track under the driving of the clamping oil cylinder;
and hydraulic elements in the hydraulic system are communicated with the jacking oil cylinders and the clamping oil cylinders in each jacking device through pipelines and accessories and are used for controlling and driving the jacking oil cylinders and the clamping oil cylinders to act.
2. The crane jacking mechanism as claimed in claim 1, wherein the first cylinder is provided with an annular groove, two semicircular rings with holes are installed in the annular groove, and the two semicircular rings are connected with a crane through bolt sets;
the head of the first main shaft is provided with a threaded hole, the bottom of the second cylinder body is provided with an external thread, and the second cylinder body is screwed in and fixed in the threaded hole of the first main shaft in a threaded connection mode.
3. The crane jacking mechanism as claimed in claim 1, wherein the jaws comprise a connecting portion, a jaw opening and a jaw which are sequentially connected from top to bottom;
the connecting portion of the clamping jaw is provided with a counter bore, the end portion of the second spindle is provided with a screw, and the screw at the end portion of the second spindle is inserted into the counter bore of the connecting portion of the clamping jaw and is assembled and fixed into a rigid body through a nut.
4. The crane jacking mechanism of claim 3 wherein the surface of the jaws and the claws are shaped to fit the cross section of the rail and the surface of the jaws is toothed.
5. The crane jacking mechanism of claim 1, wherein the hydraulic system comprises: the hydraulic control system comprises an oil tank, a main pump group, a pressure regulating valve group, a first multi-way valve group, a second multi-way valve group, a pressure sensor and a hydraulic lock;
the pressure regulating valve group is connected with the main pump group, the main pump group is communicated with the jacking oil cylinder through the first multi-way valve group, and the main pump group is communicated with the clamping oil cylinder through the second multi-way valve group; the pressure regulating valve group is combined with the main pump group, the first multi-way valve group and the second multi-way valve group and respectively controls the actions of the jacking oil cylinder and the clamping oil cylinder;
the oil tank is respectively communicated with the main pump group, the pressure regulating valve group, the first multi-way valve group and the second multi-way valve group;
the hydraulic lock is arranged between the second multi-way valve group and the clamping oil cylinder and used for locking the clamping oil cylinder for pressure maintaining.
6. The crane jacking mechanism as claimed in claim 5, wherein pressure sensors are respectively disposed on said first multi-way valve set and said jacking cylinder; and a pressure sensor is arranged in the second multi-way valve group.
7. The crane jacking mechanism of claim 1 wherein the end of the first main shaft is of a circular arc configuration.
8. The utility model provides a working process that hoist lifts mechanism, its characterized in that, hoist lifts the working process that the mechanism carries out the jack-up to the hoist and includes:
the hydraulic system drives and controls the jacking oil cylinder to act, and the first main shaft extends downwards to be in contact with the track;
the hydraulic system drives and controls the clamping oil cylinder to act, and the second main shaft drives the two clamping jaws to move oppositely to center and clamp the track; after the two clamping jaws clamp the track, the hydraulic lock locks the clamping oil cylinder for pressure maintaining;
the hydraulic system drives and controls the jacking oil cylinder to act, and the first main shaft continues to extend downwards to enable the crane to jack to a preset height.
9. The operation of the crane jacking mechanism as claimed in claim 8, wherein the operation of the crane jacking mechanism anchoring the crane comprises:
the hydraulic system drives and controls the four jacking devices to synchronously act;
the hydraulic system drives and controls the jacking oil cylinder to act, and the first main shaft extends downwards to be in contact with the track;
the hydraulic system drives and controls the clamping oil cylinder to act, the second main shaft drives the two clamping jaws to move oppositely to center the clamping rail, and after the two clamping jaws in each jacking device clamp the rail, the hydraulic lock locks the clamping oil cylinder for pressure maintaining.
10. The operation of the crane jacking mechanism as claimed in claim 8 or 9, wherein the automatic centering operation of the two jaws on the track comprises:
under the working condition that the first main shaft is not aligned with the track, the two clamping jaws move oppositely, and one clamping jaw close to the track contacts the track firstly; the jaw which is firstly contacted with the track stops moving, the other jaw continues to move towards the track under the driving of the second main shaft of the clamping oil cylinder until the other jaw is contacted with the track and stops moving, so that the two jaws finish the automatic centering of the track, the clamping of the track is realized, and the hydraulic lock locks the clamping oil cylinder for pressure maintaining.
CN202010135413.6A 2020-03-02 2020-03-02 Crane jacking mechanism and working process thereof Pending CN111362135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010135413.6A CN111362135A (en) 2020-03-02 2020-03-02 Crane jacking mechanism and working process thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010135413.6A CN111362135A (en) 2020-03-02 2020-03-02 Crane jacking mechanism and working process thereof

Publications (1)

Publication Number Publication Date
CN111362135A true CN111362135A (en) 2020-07-03

Family

ID=71202238

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010135413.6A Pending CN111362135A (en) 2020-03-02 2020-03-02 Crane jacking mechanism and working process thereof

Country Status (1)

Country Link
CN (1) CN111362135A (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB979537A (en) * 1962-09-05 1965-01-06 Sverre Munck Ship's gantry crane
FR1459813A (en) * 1965-07-01 1966-06-17 Vehicle suspension device
SU933613A1 (en) * 1979-09-07 1982-06-07 Проектно-Технологический Трест "Оргтехстрой" Воронежского Территориального Управления Строительства Loose motion preventing arrangement for load-handling machine
US4469191A (en) * 1981-10-21 1984-09-04 Adna Aktiengesellschaft Chassis with swivel-mounted wheel axles, especially for mobile cranes
JPH08333082A (en) * 1995-06-09 1996-12-17 Ishikawajima Harima Heavy Ind Co Ltd Rocking damping device of cargo handling gear
CN201206081Y (en) * 2008-01-29 2009-03-11 仲作为 Gantry crane hydraulic wind-proof apparatus
CN202224736U (en) * 2011-09-19 2012-05-23 上海理工大学 Pressure maintaining device for hydraulic locking of special-pipe cutting machine
CN104609301A (en) * 2015-02-09 2015-05-13 江西华伍制动器股份有限公司 Screw rod type electric rail clamping device
CN204751982U (en) * 2015-05-20 2015-11-11 河南省恒远起重机械集团有限公司 Safety device is prevent wind to crane on track developments
CN105417366A (en) * 2015-12-04 2016-03-23 徐州贝尔电气有限公司 Rail clamping device for rail
CN205918694U (en) * 2016-06-30 2017-02-01 山东蓬翔汽车有限公司 Multistage hydraulic cylinder for lift platform
CN207916867U (en) * 2018-01-24 2018-09-28 兖州煤业股份有限公司 A kind of hydraulic braking vehicle
CN110282546A (en) * 2019-07-09 2019-09-27 上海振华重工(集团)股份有限公司 A kind of cart walking mechanism and high pedestal jib crane

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB979537A (en) * 1962-09-05 1965-01-06 Sverre Munck Ship's gantry crane
FR1459813A (en) * 1965-07-01 1966-06-17 Vehicle suspension device
GB1111115A (en) * 1965-07-01 1968-04-24 Pradon Jacques A vehicle of the type having a plurality of bogie trucks
SU933613A1 (en) * 1979-09-07 1982-06-07 Проектно-Технологический Трест "Оргтехстрой" Воронежского Территориального Управления Строительства Loose motion preventing arrangement for load-handling machine
US4469191A (en) * 1981-10-21 1984-09-04 Adna Aktiengesellschaft Chassis with swivel-mounted wheel axles, especially for mobile cranes
JPH08333082A (en) * 1995-06-09 1996-12-17 Ishikawajima Harima Heavy Ind Co Ltd Rocking damping device of cargo handling gear
CN201206081Y (en) * 2008-01-29 2009-03-11 仲作为 Gantry crane hydraulic wind-proof apparatus
CN202224736U (en) * 2011-09-19 2012-05-23 上海理工大学 Pressure maintaining device for hydraulic locking of special-pipe cutting machine
CN104609301A (en) * 2015-02-09 2015-05-13 江西华伍制动器股份有限公司 Screw rod type electric rail clamping device
CN204751982U (en) * 2015-05-20 2015-11-11 河南省恒远起重机械集团有限公司 Safety device is prevent wind to crane on track developments
CN105417366A (en) * 2015-12-04 2016-03-23 徐州贝尔电气有限公司 Rail clamping device for rail
CN205918694U (en) * 2016-06-30 2017-02-01 山东蓬翔汽车有限公司 Multistage hydraulic cylinder for lift platform
CN207916867U (en) * 2018-01-24 2018-09-28 兖州煤业股份有限公司 A kind of hydraulic braking vehicle
CN110282546A (en) * 2019-07-09 2019-09-27 上海振华重工(集团)股份有限公司 A kind of cart walking mechanism and high pedestal jib crane

Similar Documents

Publication Publication Date Title
CN201086718Y (en) Movable electric car lifting jack
EP2969884B1 (en) Self erecting jacking tower
CA2903613C (en) Safety mechanism for scissors lift assembly
CN210140781U (en) Sound barrier installation operation platform truck
US6286695B1 (en) Engine lifting and positioning assembly
CN111517212A (en) Lifting appliance capable of adjusting position of lifting point and inclination angle of lifted object and operation method
CN111362135A (en) Crane jacking mechanism and working process thereof
CN212403195U (en) Lifting appliance capable of adjusting position of hanging point and inclination angle of lifted object
US6273215B1 (en) Multi vehicle position cantilevered lift
CN2239377Y (en) Multifunction working platform for repairing automobile
KR100387566B1 (en) Lift-apparatus for automobile
CN206014327U (en) Auxiliary turner tool
CN108751034A (en) A kind of safe double-column hydraulic formula car lift
CN201040674Y (en) Safety pliers for guide rope
CN217350544U (en) Lifting jack
CN103806415A (en) Bottom pintle removing device for ship lock miter gate
CN212801217U (en) A displacement device for scattered cable saddle installation
CN206970131U (en) A kind of double-column lifter safeties
CN216038255U (en) Main shaft turning and placing device of hydraulic generator
CN210789149U (en) Self-adaptive hydraulic type dummy bar falling-prevention safety device
CN214990086U (en) Hydraulic lifting device for masonry platform
CN217578175U (en) Intelligent stair lift with steerable clamping structure
CN201458675U (en) Hydraulic rescue lifting machine
CN210260884U (en) Port crane gust-preventing capability detection device
CN2238769Y (en) Hydraulic folding light lifting machine cabable of moving and tipping for vehicle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination