CN101537979B - Locking pin insertion and extraction device and crane with same - Google Patents
Locking pin insertion and extraction device and crane with same Download PDFInfo
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- CN101537979B CN101537979B CN2009101339411A CN200910133941A CN101537979B CN 101537979 B CN101537979 B CN 101537979B CN 2009101339411 A CN2009101339411 A CN 2009101339411A CN 200910133941 A CN200910133941 A CN 200910133941A CN 101537979 B CN101537979 B CN 101537979B
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- Prior art keywords
- stop pin
- arm
- drive element
- internal segment
- plug mean
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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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
Abstract
The invention discloses a locking pin insertion and extraction device and a crane with the same. The locking pin insertion and extraction device is used for locking the relative movement between an internal knuckle arm and an external knuckle arm, and the locking pin insertion and extraction mechanism comprises at least two locking pins installed at the tail end of a telescopic arm and provided with an extended position and a retracted position so as to lock and unlock the internal knuckle arm and the external knuckle arm, also comprises a joint guiding bar and a driving part rotatably installed at the tail end of the telescopic arm, wherein both ends of the joint guiding bar are respectively articulated with a driving part and the locking pin inner end, and when rotating under the drive of a power source member, the driving part drives the locking pins to switch positions synchronously through a joint guiding bar. Compared with the prior art, the driving part is used to drive the locking pin through the joint guiding bar in the locking pin insertion and extraction device of the invention, thereby facilitating the part processing and manufacturing, and reducing the processing cost of the driving part of the locking pin insertion and extraction device.
Description
Technical field
The present invention relates to a kind of lockout mechanism, particularly relate to a kind of stop pin plug mean that is used to lock relative motion between internal segment arm and the acromere arm, also relate to a kind of hoisting crane with above-mentioned stop pin plug mean.
Background technology
Current, the telescopic boom that can adjust length and position according to actual needs is widely used in the construction machinery and equipments such as hoisting crane, suspension transferring machine.Though the concrete structure of telescopic boom varies, its groundwork is roughly similar; In general, telescopic jib comprises the above joint arm of two joints, is sleeved in sequence together, and the internal segment arm can move with respect to the acromere arm under suitable power driven in a longitudinal direction, realizes the variation of telescopic boom length.For stability and the reliability of realizing operation, have suitable length at telescopic boom, when end reaches the desired location, need corresponding lockout mechanism internal segment arm and the locking of acromere arm, to keep the stable and reliable of telescopic boom outer end, for the operation of being scheduled to facilitates.
At present, large-tonnage both domestic and external, super-tonnage telescopic boom hoisting crane generally adopt single cylinder single oil cylinder structure, and lockout mechanism generally adopts the stop pin plug-in and pull-off device.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the internal segment arm that matches and the sectional structure scheme drawing of acromere arm, and Fig. 2 is that A the figure shows the structural representation of stop pin plug-in and pull-off device under the prior art to view among Fig. 1.
In the existing stop pin plug-in and pull-off device, each 1 of stop pin needs or 2 finger oil cylinders are controlled; Because each stop pin respectively by different finger hydraulic oil cylinder driving, in working control, can't guarantee the synchronism of stretching out action and withdrawal action of each stop pin; The action of each stop pin is asynchronous often cause some or the part stop pin stressed, and then cause discontinuity equalization on the telescopic boom all directions, severe patient may cause stop pin and/or joint arm impaired.
In addition, for telescopic boom, particularly the telescopic boom of the hoisting crane of large-tonnage or super-tonnage generally needs to arrange a plurality of stop pins; When the stop pin plug mean that utilizes prior art to provide, the stop pin of layout is many more, then needs more finger oil cylinder or other actuating device, also suitable other additional mechanism providing additional operations such as oil pipe will be set; So just make that stop pin plug mean volume is very huge, not only mounting arrangements is very difficult, and because influencing each other between mechanism and the mechanism makes its control difficulty more, and then influence the reliability of stop pin plug mean.
Summary of the invention
At problems of the prior art, the technical matters that the present invention solves is, a kind of stop pin plug mean is provided, with the synchronism of a plurality of stop pins actions of guaranteeing this mechanism.
In one aspect of the invention, a kind of stop pin plug mean is provided, be used to lock the relative motion between internal segment arm and the acromere arm, this stop pin plug mean comprises at least two stop pins that are installed in internal segment arm tail end, described stop pin has extended position and retracted position, with with internal segment arm and locking of acromere arm and releasing locking, also comprise connecting pilot bar and a drive element that is rotatably installed in internal segment arm tail end; Described connection pilot bar two ends are hinged with drive element and stop pin the inner respectively; When described drive element rotates under the propulsion source parts drive, drive described stop pin by the connection pilot bar and carry out the position conversion synchronously.
Preferably, this stop pin plug mean also comprises elastomeric element, and described elastomeric element two ends are supported on respectively on stop pin and the internal segment arm tail end, have the elastic force that makes stop pin be returned to extended position.
Preferably, when the propulsion source parts stopped outputting power, described elastomeric element made stop pin be transformed into extended position from retracted position.
Preferably, described propulsion source parts comprise telescoping cylinder, and described telescoping cylinder two ends are hinged with drive element and internal segment arm tail end respectively.
Preferably, described propulsion source parts comprise telescoping cylinder and actuating arm, and described telescoping cylinder and actuating arm are hinged, and described actuating arm is fixed on internal segment arm tail end by fastening device, and the position between described actuating arm and the internal segment arm depends on described fastening device adjustment.
In another aspect of the present invention, a kind of hoisting crane is provided, this hoisting crane has telescopic boom, and described telescopic boom has above-mentioned any stop pin plug mean.
Compared with prior art, stop pin plug mean provided by the invention comprises a drive element that is rotatably installed in internal segment arm tail end, this drive element can drive the stop pin synchronization action of this device, make stop pin carry out the position conversion synchronously, thereby can avoid because the asynchronous some or part stop pin overload that causes of action guarantees telescopic boom functional reliability and stability.Simultaneously, drive a plurality of stop pin actions with a drive element in this invention, can make stop pin plug mean structure simpler, volume is littler, makes the installation of stop pin plug mean very convenient with layout.
In optional technical scheme, the guide grab of drive element is matched with the pilot hole of stop pin, can carry out suitable control to the bidirectional-movement of stop pin by drive element, thereby can increase stop pin plug mean reliability.
In optional technical scheme, on described drive element, establish guide groove, and guide groove is matched with the connecting pin of the inner that is installed in described stop pin, and the action that drive element can control lock rationed marketing on both direction also can guarantee the reliability of stop pin plug mean.
In the optional technical scheme of another kind, drive element moves by connecting pilot bar driving stop pin, can make things convenient for processing, the manufacturing of parts, reduces the tooling cost of stop pin plug mean drive element.
In further technical scheme, described stop pin plug mean also is provided with elastomeric element, and described elastomeric element has the elastic force that makes stop pin be returned to extended position.This technical scheme can be accelerated the stop pin plug mean and change to lock-out state from released state.
In further technical scheme, at the propulsion source component failure, when takeoff output interrupts, described elastomeric element can also overcome the resistance that drive element forms, the driving stop pin is protruding, and make the stop pin plug mean keep lock-out state, can increase the reliability of stop pin plug mean like this.
Stop pin plug mean provided by the invention is applicable to the internal segment arm of telescopic boom and the locking between the acromere arm.
Description of drawings
Fig. 1 is the internal segment arm that matches and the sectional structure scheme drawing of acromere arm;
Fig. 2 is that A the figure shows the structural representation of stop pin plug-in and pull-off device under the prior art to view among Fig. 1;
Fig. 3 is the structural representation of the stop pin plug mean master apparent direction that provides for the embodiment of the invention one, and the direction of observation of this figure is parallel with longitudinal direction, the state when the figure shows stop pin and being in extended position;
Fig. 4 is an I-I part enlarged drawing among Fig. 3, the figure shows the position relation of stop pin and retracing spring;
Fig. 5 is in the embodiment of the invention one, the structural representation of drive element;
Fig. 6 is that B the figure shows the structure of stop pin the inner to view among Fig. 4;
When Fig. 7 is the drive element rotation, the scheme drawing of the position relation of guide grab and connecting pin;
Fig. 8 is the state of the stop pin of the stop pin plug mean that provides of the embodiment of the invention one when being in retracted position;
Fig. 9 is in the embodiment of the invention one, the scheme drawing of the guide grab of another kind of structure and the position of connecting pin relation;
Figure 10 is the structural representation of the stop pin plug mean that provides of the embodiment of the invention two;
Figure 11 is the structural representation of the stop pin plug mean that provides of the embodiment of the invention three;
Figure 12 is a kind of structural representation with drive element of guiding annular groove;
Figure 13 is among the embodiment four, the structural representation of drive element;
Figure 14 is the structural representation of the stop pin plug mean that provides of the embodiment of the invention five;
Figure 15 is the structural representation of the stop pin plug mean that provides of the embodiment of the invention six
Figure 16 is among the embodiment six, the motion principle figure of stop pin plug mean.
The specific embodiment
Describe the present invention below in conjunction with accompanying drawing, the description of this part only is exemplary and explanatory, should any restriction not arranged to protection scope of the present invention.
Should be noted that: in the presents, if no special instructions, be reference with the internal segment arm axle line of telescopic boom, the direction consistent with internal segment arm axle line direction is longitudinal direction, direction around internal segment arm axle line is a circumferential direction, near in internal segment arm axle line is, away from internal segment arm axle line be outside.
Please refer to Fig. 3, the structural representation of the stop pin plug mean master apparent direction that Fig. 3 provides for the embodiment of the invention one, the direction of observation of this figure is parallel with longitudinal direction.The stop pin plug mean that embodiment one provides comprises a drive element 310, four stop pins 320 and four retracing springs 330.In addition, for the convenience of describing, also show internal segment arm 110 and acromere arm 130 among the figure.
Please refer to Fig. 4, Fig. 4 is an I-I part enlarged drawing among Fig. 3, and this figure has illustrated the position relation of stop pin and retracing spring.Stop pin 320 is installed on the key seat 111 of internal segment arm 110 tail ends, and can be along its axial-movement; Four stop pins 320 are at the circumferential rectangular distribution of the tail end of internal segment arm 110.Four retracing springs 330 are enclosed within respectively outside the stop pin 320, one end bearing is on key seat 111, the other end is bearing on the supporting base 321 of stop pin 320, and by the application force that supporting base 321 keeps stop pin 320, makes stop pin 320 have the trend that moves outward; When stop pin 320 is in free state, retracing spring 330 can make stop pin 320 be in extended position, and matched in the outer end of stop pin 320 with the lock hole of acromere arm 130, when four stop pins 320 all are in extended position, just can make internal segment arm 110 and acromere arm 130 guarantee lock-out state.Being appreciated that retracing spring 330 is not limited to coil spring, also can be other forms of spring, as leaf spring, torsion spring etc.; Also can be other elastomeric elements with suitable elastic force.
With reference to figure 5, Fig. 5 is in the embodiment of the invention one, the structural representation of drive element.Drive element 310 is rotatably installed in the tail end of internal segment arm 110, and is driven by propulsion source parts 340.Drive element 310 preferred discotic structures, so that keep balance in rotary course, its rotation axis overlaps with internal segment arm 110 longitudinal axis.Propulsion source parts 340 comprise actuating arm 341 and two telescoping cylinders 342; The tail end of internal segment arm 110 is installed and is fixed at actuating arm 341 middle parts, and two ends are protruding symmetrically.One outer end of telescoping cylinder 342 1 ends and actuating arm 341 is hinged, and the other end and drive element 310 are hinged; Two telescoping cylinder 342 symmetric arrangement when telescoping cylinder 342 stretches, can change the distance between its two ends hinge-point; Because actuating arm 341 maintains static, telescoping cylinder 342 moves with drive element 310 pivotallys attached one end, makes drive element 310 rotations.Change the distance between telescoping cylinder 342 two ends, just can make the suitable angle of drive element 31 rotations.Be understood that the meaning with 310 rotations of two telescoping cylinders, 342 driving drive elements is, can guarantee the stress balance of drive element 310 and actuating arm 341, avoid or alleviate because the wearing and tearing that caused by force unbalance, prolong the service life of drive element 310, improve the reliability of stop pin plug mean work; Under specific circumstances, also can drive drive element 310 rotations with a telescoping cylinder 342; Telescoping cylinder 342 can be hydraulic ram or air cylinder or the like.In this example, telescoping cylinder 342 is hinged with actuating arm 341, and actuating arm 341 is installed in internal segment arm 110 tail ends by fastening device, the meaning of this technical scheme is: can produce corresponding wearing and tearing between connecting pin 322 described later and the guiding curved surface, therefore, need to adjust the distance between the telescoping cylinder 342 two ends hinge-points by suitable operating cycles; When adjusting, can concern realization by the position of adjusting between actuating arm 341 and the internal segment arm 110, thereby can make things convenient for the maintenance of stop pin plug mean; And, when the stop pin plug mean is installed, also can concern the distance of adjusting easily between the telescoping cylinder 342 two ends hinge-points with position between internal segment arm 110 tail ends, for the installation of stop pin plug mean facilitates by adjusting actuating arm 341.Be appreciated that, the distance of adjusting between the telescoping cylinder 342 two ends hinge-points has multiple concrete mode, actuating arm 341 is realized with respect to the suitable angle of internal segment arm 110 rotations, also can be realized by the hinge-point of change actuating arm 341 outer ends and the distance between internal segment arm 110 axis.Be appreciated that under specific circumstances, also can telescoping cylinder 342 and internal segment arm 110 tail ends are directly hinged, with simplified structure.
As shown in Figure 5, drive element 310 has four guide grabs 311, and each guide grab 311 is relative with a stop pin 320 respectively.Guide grab 311 the inners are fixed with the periphery of the drive element 310 of plate-like, and the outer end is in drive element 310 outsides.In this example, four guide grab 311 structures are identical, and its outer end is extended suitable angle along clockwise direction.
With reference to figure 6 and Fig. 7, Fig. 6 is that B is to view among Fig. 4, and this figure has illustrated the interior end structure of stop pin, when Fig. 7 is the drive element rotation, and the scheme drawing of the position relation of guide grab and connecting pin.Has connecting pin 322 in stop pin 320 the inners; In stop pin 320 inside, connecting pin 322 outsides have through hole radially, this hole is a pilot hole 323, pilot hole 323 can hold guide grab 311.When the suitable angle of drive element 310 rotation, guide grab 311 outer ends enter in the pilot hole 323, and connecting pin 322 matches with the medial surface of guide grab 311, and along with the anglec of rotation difference of guide grab 311, move along guide grab 311 medial surfaces.Guide grab 311 medial surfaces are the guiding curved surface, and this guiding curved surface has predetermined trend, when connecting pin 322 is moved along the guiding curved surface of guide grab 311, move to the rotation axis of drive element 310.As shown in Figure 7, during in the C1 position, the distance between the axis of connecting pin 322 and drive element 310 rotation axiss is R1 at connecting pin 322, and during in the C2 position, the distance between connecting pin 322 axis and drive element 310 axis is R2, R2＞R1 at connecting pin 322; Therefore, when drive element 310 rotation, when connecting pin 322 moved along the guiding curved surface of guide grab 311 inboards, also the rotation axis with respect to drive element 310 moved; Because connecting pin 322 is installed on the stop pin 320, stop pin 320 can only move on its axis direction, therefore, connecting pin 322 can drive stop pin 320 along moving on its axial direction with respect to moving of drive element 310 rotation axiss, and then make stop pin 320 action of withdrawing, be transformed into retracted position from extended position.
The working process of the stop pin plug mean that embodiment one is provided is described below.
With reference to figure 3 and Fig. 8, Fig. 3 shows the structural representation of the stop pin plug mean master apparent direction that the embodiment of the invention one provides, the state when the figure shows stop pin and being in extended position; The stop pin of the stop pin plug mean that Fig. 8 provides for the embodiment of the invention one is in the state of retracted position.
As Fig. 3, during with 130 lockings of suitable internal segment arm 110 and acromere arm, telescoping cylinder 342 is shunk at needs, guide grab 311 breaks away from connecting pin 322 along with drive element 310 conter clockwises (is with Fig. 3 with reference to) rotation; Stop pin 320 is under the effect of retracing spring 330, protruding, match with the lock hole of acromere arm 130 in its outer end, four stop pins 320 match with lock hole on 130 4 sides of acromere arm respectively, realize the locking between internal segment arm 110 and the acromere arm 130.
As Fig. 8, needs internal segment arm 110 with respect to acromere arm 130 when longitudinal direction moves, need to remove locking relation between the two.Make telescoping cylinder 342 elongations, actuating arm 341 is fixing with internal segment arm 110, and telescoping cylinder 342 elongations make drive element 310 cws (is reference with Fig. 8) rotation.Guide grab 311 enters in the pilot hole 323, and connecting pin 322 matches with the guiding curved surface of guide grab 311 inboards; Along with telescoping cylinder 342 length constantly increase, connecting pin 322 moves on the guiding curved surface with respect to guide grab 311; Because stop pin 320 can only move on its axis direction, when connecting pin 322 moved along the guiding curved surfaces, driving stop pin 320 moved inward along its axis direction, overcame the action of withdrawing of retracing spring 330 elastic force; When telescoping cylinder 342 stretches out predetermined length, the predetermined angle of drive element 310 rotations, stop pin 320 moves inward suitable distance, is transformed into retracted position from extended position; The lock hole of the outer end of each stop pin 320 and acromere arm 130 breaks away from, and removes the locking relation between internal segment arm 110 and the acromere arm 130.
Be appreciated that, according to foregoing description, a plurality of stop pins 320 of the stop pin plug mean among the embodiment one are driven by a drive part 310, can carry out predetermined actions synchronously, thereby can guarantee that each stop pin 320 is in identical state, or be in extended position simultaneously, or be in retracted position simultaneously; Therefore, this stop pin plug mean can be avoided guaranteeing the reliability and stability of telescopic boom work because the asynchronous stop pin that causes 320 of action transships.Simultaneously, drive a plurality of stop pin 320 actions with a drive element 310 in this invention, can make stop pin plug mean structure simpler, reduce the volume of this device, make the installation of stop pin plug mean very convenient with layout.And this technical scheme will rotatablely move by the guiding curved surface and convert motion of translation to, can facilitate for the installation and the location of stop pin 320 on the one hand, and stop pin 320 outer ends are cooperated more easily with the lock hole of acromere arm 130; On the other hand, match with connecting pin 322, can reduce the shearing force that stop pin 320 is subjected to, make its more reasonable stress, reduce the wearing and tearing between stop pin 320 and the key seat 111, prolong the service life of stop pin 320 by the guiding curved surface.Be appreciated that, in order further to reduce the shearing force of 310 pairs of stop pins 320 of drive element, suitable connection guide can be installed outside connecting pin 322, and the connection guide can be rotated with respect to connecting pin 322, cliding friction will be converted into friction of rolling between curved surface and the connecting pin 322 leading.
Be appreciated that drive element 310 is not limited to rely on telescoping cylinder 342 and drives, can also adopt other mechanisms to realize, such as: can provide propulsive effort as the propulsion source parts with oscillating oil cylinder or rotary oil cylinder; Also can provide power for drive element with motor, or the like.
Be appreciated that, can make retracing spring 330 have suitable elastic force, when the connecting line that cuts off between telescoping cylinder 342 and hydraulic efficiency pressure system or the pressure system, retracing spring 330 elastic forces can overcome the friction force that telescoping cylinder 342 produces, and force drive element 310 contrarotations by connecting pin 322.The meaning of doing like this is, in the time of can providing the thrashing of power at telescoping cylinder 342 or for telescoping cylinder 342, stop pin 320 is stretched out, or keeps extended position, with internal segment arm 110 and 130 lockings of acromere arm, guarantees the safety of telescopic boom.
Among the embodiment one, driving elastic force that stop pin 320 overcomes retracing spring 330 when extended position is transformed into retracted position, the meaning of utilizing pilot hole 323 to hold guide grab 311 is, can guarantee the guiding curved surface of guide grab 311 and cooperating of connecting pin 322, thereby can make the stop pin plug mean have higher reliability.Can guarantee that connecting pin 322 matches and just can realize driving the purpose that stop pin 320 carries out predetermined action with the guiding curved surface as long as be understood that, therefore, the cooperation place of guiding curved surface and connecting pin 322 is not limited in stop pin 320 inside, connecting pin 322 is reached outside the stop pin 320, the guiding curved surface is matched with the sponson of connecting pin 322.In order to make guide grab 311 have bigger intensity, thereby provide bigger propulsive effort, drive stop pin 320 and carry out predetermined actions, drive element 310 can also have other concrete structures.Please refer to Fig. 9, this figure is in the embodiment of the invention one, the scheme drawing of the guide grab of another kind of structure and the position of connecting pin relation, among this figure, in stop pin 320 outsides, guide grab 311 with stretch out connecting pin 322 two parts outward and match; The meaning of this structure is: guide grab 311 has bigger intensity, and bigger propulsive effort can be provided, and drives the needs that stop pin 320 carries out predetermined action to satisfy.
Above-mentioned serves as improvement and the change that make on the basis with embodiment one, also can combine by rights with the technical scheme that following each embodiment provides, therefore, and when following each embodiment is described, explanation no longer one by one.
Please refer to Figure 10, this figure is the structural representation of the stop pin plug mean that provides of the embodiment of the invention two.Among the embodiment two, guide grab 311 two ends link to each other with drive element 310 respectively, the sealing of guide grab 311 medial surfaces, and have the guiding curved surface that cooperates with connecting pin 322; In this example, because guide grab 311 two ends link to each other with drive element 310, therefore have bigger intensity, can provide bigger propulsive effort for stop pin 320, strengthen the reliability of stop pin plug mean work, the needs of satisfied more large-tonnage hoisting crane or Other Engineering machinery.
From embodiment two as can be seen, guide grab 311 two ends all link to each other with drive element 310, just form the structure of a groove shape like this between guide grab 311 and drive element 310.On the basis of embodiment two, the embodiment of the invention three provides the stop pin plug mean of another kind of structure.
With reference to Figure 11, this figure is the structural representation of the stop pin plug mean that provides of the embodiment of the invention three.Drive element 310 has guide groove 312, and guide groove 312 matches with the connecting pin 322 that is installed in stop pin 320 the inners; Described guide groove 312 has predetermined trend, when drive element 310 rotations, connecting pin 322 slides along guide groove 312, same principle, connecting pin 322 is along guide groove 312 slips the time, can drive stop pin 320 along its axial motion, make stop pin 320 carry out predetermined actions, realize the position conversion.As shown in figure 11, be appreciated that stop pin plug mean that this example provides when drive element 310 clickwises, can drive stop pin 320 withdrawals, make stop pin 320 be transformed into retracted position from extended position; When drive element 310 left-hand revolutions, can also drive stop pin 320 and stretch out, make stop pin 320 be transformed into extended position from retracted position; Therefore, the meaning of this structure is: the action that drive element 310 can two-way control lock rationed marketing 320, and then can improve the reliability of stop pin plug mean work; When retracing spring 330 lost efficacy, pin rationed marketing plug mean also can play a role, and under specific circumstances, can also save retracing spring 330, to simplify the structure of stop pin plug mean.
When providing power for drive element 310 with action source blocks such as motor, oscillating oil cylinders, also the guide groove 312 that cooperates with each connecting pin 322 can be interpenetrated, form guiding annular groove 313.Please refer to Figure 12, this figure is a kind of structural representation with drive element of guiding annular groove, the guiding annular groove 313 of drive element 310 can match with connecting pin 322, under the propulsion source parts drive, during drive element 310 rotations, can make between connecting pin 322 axis and drive element 310 rotation axiss apart from the generating period variation, thereby make the stop pin 320 can be at the enterprising line period sexual act of its axial direction, realize the preposition conversion; The meaning of this structure is: can make the fitting surface wearing and tearing between drive element 310 and the connecting pin 322 more even, further guarantee the synchronism of action between the stop pin 310.Certainly, for guaranteeing connecting pin 322 and guiding annular groove 313 or guide groove 312 bonded assembly reliability, guiding annular groove 313 or guide groove 312 can be done "T"-shaped structure, adapt therewith, the structure that matches with the T-shape structure need be made in the end of connecting pin 322.
Please refer to Figure 13, this figure is among the embodiment four, the structural representation of drive element.In this example, drive element 310 comprises four guide grabs 311 equally, and the places different with embodiment one are: the lateral surface of guide grab is parallel with medial surface, and guiding curved surface 3112 in medial surface forms, lateral surface form outer guiding curved surface 3111; In addition, guide grab 311 matches with the pilot hole 323 of stop pin 320; When drive element 310 clickwises, the interior guiding curved surface 3112 and the pilot hole 323 sidewall mutual actions of guide grab 311 drive the elastic force that stop pin 320 overcomes retracing spring 330, are transformed into retracted position from extended position; When drive element 310 left-hand revolutions, the outer guiding of guide grab 311 curved surfaces 3111 and pilot hole 323 sidewall mutual actions under the combined action of retracing spring 330 elastic forces, make stop pin 320 be transformed into extended position from retracted position.Be appreciated that drive element 310 that this example provides also can realize the two-way control to stop pin 320, therefore, under specific circumstances, also retracing spring 330 can be saved.
According to embodiment three, as can be seen, drive element 310 drives stop pin 320 when protruding, and what work is the internal face of guide groove 312, and therefore, with retracing spring 330 oppositely during assembling, it is protruding also can only to drive stop pin with drive element 310.
Please refer to Figure 14, this figure is the structural representation of the stop pin plug mean that provides of the embodiment of the invention five.As shown in the figure, retracing spring 330 is oppositely installed, and can keep stop pin 320 is applied an application force to the motion of retracted position direction.In drive element 310 outsides, has the guiding curved surface that cooperates with connecting pin 322; When needs stop pin 320 stretches out, can make drive element 310 left-hand revolutions (is reference with Figure 14), it is protruding to drive stop pin 320 by guiding curved surface and cooperating of connecting pin 322, makes stop pin 320 overcome the application force of retracing spring 330, is transformed into extended position from retracted position; When 320 withdrawals of needs stop pin, make drive element 310 contrarotations, stop pin 320 can be withdrawn under retracing spring 330 effects, is transformed into retracted position from extended position.
In the foregoing description, drive element 310 cooperates the control that realizes stop pin 320 predetermined action with connecting pin 322 by suitable guiding curved surface.The trend and stop pin 320 motion characteristicss that are appreciated that above-mentioned guiding curved surface have definite relation, therefore, guarantee the motion characteristics of stop pin 320, the working accuracy and the specific curvature of the curved surface that will guarantee to lead.Be appreciated that processing guiding curved surface needs specific processing technology and Fabricating machinery, so just make the processing of drive element 310 very complicated and difficult, the processing and manufacturing cost is higher; In addition, because the friction between connecting pin 322 and the guiding curved surface in use, in order to guarantee the motion characteristics of stop pin 320, needs regularly the stop pin plug mean to be safeguarded that this also uses telescopic boom and causes a lot of inconvenience.In order to overcome these problems, the present invention also provides the stop pin plug mean of another kind of structure, and this device has another kind of guiding mechanism.
Please refer to Figure 15, this figure is the structural representation of the stop pin plug mean that provides of the embodiment of the invention six.This example is to propose on the basis of embodiment one, is with the structure difference of embodiment one: drive element 310 is connected pilot bar 500 driving stop pins 320 by one and carries out predetermined actions.As shown in the figure, connect guide finger 500 and have suitable length, and an end and stop pin 320 are hinged, the other end and drive element 310 are hinged; Stop pin 320 can only move on its axial direction.With reference to Figure 16, this figure is among the embodiment six, the motion principle figure of stop pin plug mean, and among this figure, the direction parallel with stop pin 320 axis directions is the Y direction.The motion principle of this embodiment is: at drive element 310 during with the direction as shown clickwise, on the Y direction, the distance L that connects between the two ends hinge-point of guide finger 500 reduces; Because stop pin 320 can only move on the Y direction, connect guide finger 500 with respect to stop pin 320 left-hand revolutions, it is protruding to drive stop pin 320 simultaneously, makes stop pin 320 be transformed into extended position from retracted position, with internal segment arm 110 and 130 lockings of acromere arm; During with the direction as shown left-hand revolution, on the Y direction, the distance L that connects between the guide finger 500 two ends hinge-points increases at drive element 310; Connect guide finger 500 with respect to stop pin 320 clickwises, spur stop pin 320 simultaneously and inwardly withdraw, be transformed into retracted position, remove the locking between internal segment arm 110 and the acromere arm 130 from extended position.In this example, the connection guide finger 500 of selected suitable length just can be realized the control to stop pin 320 actions, owing to do not have Machining of Curved Surface, makes that each parts is processed, installation and maintenance is very convenient, can also realize two-way control, guarantee the reliability of control stop pin.In addition, have retracing spring 330 drive stop pins 320 from retracted position when extended position is changed, also can change suitable length, flexible connecting strand into connecting guide finger 500, pass through connecting strand, overcome the application force of retracing spring 330, stop pin 320 is retracted retracted position from extended position, realize control stop pin 320; The meaning of this technical scheme is further to cut down finished cost simplified structure.
On the basis that above-mentioned stop pin plug mean is provided, a kind of hoisting crane also is provided, this hoisting crane has telescopic boom, and telescopic boom has above-mentioned any stop pin plug mean; Because the stop pin plug mean has above-mentioned technique effect, the hoisting crane with above-mentioned stop pin plug mean also has above-mentioned technique effect.
The above only is a preferred implementation of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications; also above-mentioned technology contents can be combined to form other technical scheme, these improvements and modifications, and the other technologies scheme that forms also should be considered as protection scope of the present invention.
Claims (6)
1. stop pin plug mean, be used to lock the relative motion between internal segment arm and the acromere arm, this stop pin plug mean comprises at least two stop pins that are installed in internal segment arm tail end, described stop pin has extended position and retracted position, so that internal segment arm and acromere arm are locked and remove locking, it is characterized in that, also comprise connecting pilot bar and a drive element that is rotatably installed in internal segment arm tail end; Described connection pilot bar two ends are hinged with drive element and stop pin the inner respectively; When described drive element rotates under the propulsion source parts drive, drive described stop pin by the connection pilot bar and carry out the position conversion synchronously.
2. stop pin plug mean according to claim 1 is characterized in that, also comprises elastomeric element, and described elastomeric element two ends are supported on respectively on stop pin and the internal segment arm tail end, have the elastic force that makes stop pin be returned to extended position.
3. stop pin plug mean according to claim 2 is characterized in that, when the propulsion source parts stopped outputting power, described elastomeric element made stop pin be transformed into extended position from retracted position.
4. according to each described stop pin plug mean of claim 1-3, it is characterized in that described propulsion source parts comprise telescoping cylinder, described telescoping cylinder two ends are hinged with drive element and internal segment arm tail end respectively.
5. according to each described stop pin plug mean of claim 1-3, it is characterized in that, described propulsion source parts comprise telescoping cylinder and actuating arm, described telescoping cylinder and actuating arm are hinged, described actuating arm is fixed on internal segment arm tail end by fastening device, and the position between described actuating arm and the internal segment arm depends on described fastening device adjustment.
6. hoisting crane, this hoisting crane has telescopic boom, it is characterized in that, and described telescopic boom has claim 1 to each described stop pin plug mean of claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101339411A CN101537979B (en) | 2009-04-14 | 2009-04-14 | Locking pin insertion and extraction device and crane with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101339411A CN101537979B (en) | 2009-04-14 | 2009-04-14 | Locking pin insertion and extraction device and crane with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101537979A CN101537979A (en) | 2009-09-23 |
| CN101537979B true CN101537979B (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101339411A Expired - Fee Related CN101537979B (en) | 2009-04-14 | 2009-04-14 | Locking pin insertion and extraction device and crane with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101537979B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101850935B (en) * | 2010-06-22 | 2013-03-06 | 三一汽车起重机械有限公司 | Single-cylinder pin type telescopic arm device and pin interlocking device |
| CN102501054B (en) * | 2011-12-29 | 2013-09-04 | 徐州重型机械有限公司 | Device for adjusting sliding way of telescoping cylinder of crane |
| CN102619820B (en) * | 2012-04-06 | 2013-12-04 | 中联重科股份有限公司 | Fixing device and engineering machinery with same |
| FR3046150B1 (en) * | 2015-12-23 | 2017-12-29 | Manitowoc Crane Group France | TOWER CRANE COMPRISING A TELESCOPIC MAT |
| EP3448795B1 (en) | 2016-04-25 | 2023-07-26 | Manitowoc Crane Companies, LLC | Crane with rotary locking mechanism |
| CN107673247B (en) * | 2017-09-01 | 2019-10-22 | 北汽福田汽车股份有限公司 | Telescopic jib and engineering machinery |
| EP3578500B1 (en) | 2018-06-04 | 2022-07-20 | Manitowoc Crane Companies, LLC | Telescoping boom with rotary extension and locking system |
| CN109534192B (en) * | 2019-01-04 | 2024-03-05 | 三一汽车起重机械有限公司 | Locking mechanism for crane boom, crane boom and crane |
| JP7226184B2 (en) * | 2019-08-21 | 2023-02-21 | 株式会社タダノ | work machine |
| CN110902582B (en) * | 2019-12-04 | 2021-07-09 | 太原重工股份有限公司 | Telescopic boom and crane comprising same |
-
2009
- 2009-04-14 CN CN2009101339411A patent/CN101537979B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101537979A (en) | 2009-09-23 |
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