Connecting rod type carrying pin inserting mechanism for crane
The present invention is mainly concerned with the hoisting crane field, refers in particular to a kind of connecting rod type carrying pin inserting mechanism for crane.
Present large-tonnage both domestic and external, super-tonnage car hosit generally adopt single cylinder single oil cylinder telescoping mechanism, and this class telescoping mechanism mainly is made up of the bearing pins on bolt mechanism, telescopic oil cylinder, the arm and other duplicate.Bolt mechanism is the critical component of this class telescoping mechanism.
Bolt mechanism mainly is made up of the plug-in and pull-off device of flexible pin assembly and bearing pins, and its main principle of work can be illustrated by Fig. 1.The flexible pin assembly of bolt mechanism and the plug-in and pull-off device of bearing pins have been marked among Fig. 1, its working process is: 1, the movable end of bolt mechanism and telescopic oil cylinder is fixed, flexible pin assembly stretches out pin at the afterbody of first telescopic boom, and the movable end of telescopic oil cylinder is comprised that the telescoping mechanism and first telescopic boom interconnect; 2, bearing pins one is fixed on the first telescopic boom afterbody, by the pin-and-hole that inserts on the basic arm first telescopic boom is connected on the basic arm; 3, the plug-in and pull-off device of bearing pins is extracted bearing pins one from pin-and-hole, and the basic arm and first telescopic boom are separated from each other; 4, the fixed end of telescopic oil cylinder is fixed on the basic arm afterbody, at this moment will drive first telescopic boom when telescopic oil cylinder moves and other telescopic boom of being fixed on above it moves simultaneously, has realized the flexible of arm; 5, when first telescopic boom moves to the pin-and-hole position of an appointment, the plug-in and pull-off device of bearing pins discharges bearing pins one, and bearing pins one ejects by the application force of retracing spring, inserts in the pin-and-hole again, first telescopic boom is reconnected on the basic arm, thereby realized the once flexible of arm.Above action can circulate and carry out.If desired arm is extremely stretched state entirely from full reduced state action, then must stretch the N telescopic boom earlier, the flexible then pin assembly pin that will stretch is regained, bolt mechanism with the portion of the movable end of telescopic oil cylinder and N telescopic boom from and retract to the afterbody of N-1 telescopic boom, repetitive cycling is up to first telescopic boom is reached the position.
From above bolt mechanism working process, the flexible pin assembly of bolt mechanism and the plug-in and pull-off device of bearing pins move more frequent in the telescopic process of arm, and the service condition complexity plays critical effect in flexible action.The plug-in and pull-off device action of flexible pin assembly and bearing pins all realizes by pressure oil and retracing spring in the existing bolt mechanism, its principle of work is as follows: Fig. 2 is the scheme drawing of flexible pin assembly, when not having pressure oil to enter oil cylinder, flexible pin 101 is released and is inserted the pin-and-hole of arm 105 afterbodys by retracing spring 102, interconnect bolt mechanism and arm 105 fixing, when pressure oil enters pressure oil acting chamber 104, flexible pin 101 is withdrawn in the cylinder tube, and bolt mechanism is separated with arm 105; Fig. 3 is the scheme drawing of the plug-in and pull-off device of bearing pins 106, when bolt mechanism with after arm 105 is connected, the plate 107 of pulling pin of the plug-in and pull-off device of bearing pins 106 hooks bearing pins 106, effect by pressure oil, piston rod 108 drives the plate 107 of pulling pin bearing pins 106 is extracted downwards, at this moment two arms 105 separate, telescopic oil cylinder drives arm 105 and moves to another one appointment pin-and-hole position, pressure oil is cut off, reset by the application force piston rod 108 of the sheet reset spring 109 of pulling pin and the plate 107 of pulling pin, bearing pins 106 is released the back and inserts automatically in the pin-and-hole, and two arms 105 are retightened together.
Existing bolt mechanism is owing to be subjected to the restriction of arm 105 inner space sizes, the plug-in and pull-off device main body 110 of flexible pin assembly main body 103 and bearing pins is a shared body element (Fig. 2 and device main body shown in Figure 3 are same main body), the dimension precision requirement height of this main body, added that piston rod 108 moves in main body, need a lot of packing elements to be installed in body interior, cause the difficulty of processing of bolt mechanism main body big like this, needed most advanced and sophisticated equipment and complicated technology to ensure the quality of products; Bolt mechanism is the tail end that is fixed on the telescopic oil cylinder cylinder barrel, then the piston rod of telescopic oil cylinder must be pulled out from cylinder barrel as need dismounting bolt mechanism, just can carry out further work then, if go wrong in arm 105 inside, the work capacity of maintenance is very large; The flexible pin 101 of flexible pin assembly is subjected to is friction stress on the cross-sectional plane, because flexible pin 101 is one with piston rod 108, this stress is finally born by the piston rod 108 of packing element and flexible pin 101, through repeatedly damaging packing element and the flexible piston rod of selling 108 behind the back and forth movement, problems such as hydraulic oil is revealed, device quilt card appear, the plug-in and pull-off device of bearing pins 106 has two oil cylinders to plate 107 effects of pulling pin, because application force is not on same straight line, the piston rod 108 of two oil cylinders can be subjected to offset loading force, hair fastener, problem such as return not occur.Above problem has caused bolt mechanism overall performance instability, and reliability is not high.
Summary of the invention
The technical problem to be solved in the present invention just is: at the technical matters that prior art exists, the invention provides a kind of simple and compact for structure, installation and maintenance convenient, performance is more reliable and more stable, improve the connecting rod type carrying pin inserting mechanism for crane of overall efficiency.
For solving the problems of the technologies described above, the solution that the present invention proposes is: a kind of connecting rod type carrying pin inserting mechanism for crane, it is characterized in that: it comprises bearing, the plate of pulling pin, sliding seat, spring reset mechanism and connecting rod mechanism, two blocks of plates of pulling pin are positioned at the both sides of bearing, the sliding seat activity that links to each other with single-acting cylinder is installed on the bearing, the plate of pulling pin links to each other with sliding seat by connecting rod mechanism, and sliding seat links to each other with spring reset mechanism.
Described spring reset mechanism comprises the spring axis of guide and retracing spring, and retracing spring is sheathed between the spring axis of guide, and the spring axis of guide links to each other with sliding seat.
The described plate of pulling pin links to each other with bearing by a guiding mechanism, and this guiding mechanism comprises pilot bar and orienting lug, and orienting lug is fixed on the plate of pulling pin, and pilot bar one end is fixed on the bearing, and the other end is sheathed in the guide groove of orienting lug.
Described connecting rod mechanism comprises main connecting rod and auxiliary connecting rod, and the two ends of main connecting rod are articulated in respectively on pull pin plate and the sliding seat, and the two ends of auxiliary connecting rod are articulated in respectively on pull pin plate and the bearing.
Described guiding mechanism is provided with self-locking device.
Described bearing is provided with position detecting device.
Compared with prior art, advantage of the present invention just is: the single acting oil cylinder imput power is the amount of a variation with the ratio of the power of pulling pin among the present invention, main connecting rod in the angle of the plate of pulling pin during less than 45 ° single acting oil cylinder be the labour-saving, usually begin to pull pin when angle is about 20 °, the at this moment required power of pulling pin also is mechanism's labour-saving state when being maximum.Action and the latch of pulling pin of the present invention moves and can both finish at short notice, can guarantee the high efficiency requirement of mechanism.The processing technology of some vital partss among the present invention realizes that easily domestic existing conventional Fabricating machinery just can guarantee.The present invention can integral disassembly, assembly and do not influence other mechanism of interoperation with it, for installing and maintenance provides convenience.This device has realized that oil cylinder separates with the plate of pulling pin, and reliability improves greatly, and fault rate is low.
Description of drawings
Fig. 1 is a bolt mechanism principle of work scheme drawing in the prior art;
Fig. 2 is the structural representation of flexible pin assembly in the prior art;
Fig. 3 is the structural representation of carrying pin inserting device in the prior art;
Fig. 4 is the frame principles scheme drawing of push-pull structure of the present invention;
Fig. 5 is the main TV structure scheme drawing after the present invention assembles;
Fig. 6 is the plan structure scheme drawing after the present invention assembles.
1, bearing 2, bearing pin
3, main connecting rod 4, auxiliary connecting rod
5, pull pin plate 6, orienting lug
7, pilot bar 8, sliding seat
9, the spring axis of guide 10, retracing spring
11, single acting oil cylinder
101, flexible pin 102, retracing spring
103, flexible pin assembly main body 104, pressure oil acting chamber
105, arm 106, bearing pins
107, pull pin plate 108, piston rod
109, pull pin sheet reset spring 110, plug-in and pull-off device main body
111, pressure oil cavity
The specific embodiment
Below with reference to the drawings and specific embodiments the present invention is described in further details.
As shown in Figure 5 and Figure 6, connecting rod type carrying pin inserting mechanism for crane of the present invention, it comprises bearing 1, the plate 5 of pulling pin, sliding seat 8, spring reset mechanism and connecting rod mechanism, the plate 5 of pulling pin respectively has one left and right, two blocks of plates 5 of pulling pin are positioned at the both sides of bearing 1, sliding seat 8 activities that link to each other with single acting oil cylinder 11 are installed on the bearing 1, and the plate 5 of pulling pin links to each other with sliding seat 8 by connecting rod mechanism, and sliding seat 8 links to each other with spring reset mechanism.In the present embodiment, the plate 5 of pulling pin links to each other with bearing 1 by a guiding mechanism, and this guiding mechanism comprises pilot bar 7 and orienting lug 6, and orienting lug 6 is fixed on the plate 5 of pulling pin, and pilot bar 7 one ends are fixed on the bearing 1, and the other end is sheathed in the guide groove of orienting lug 6.The plate 5 of pulling pin is subjected to the restriction of orienting lug 6 to be parallel to pilot bar 7 to move, and obtains power by connecting rod mechanism, the action that can finish latch and pull pin.Connecting rod mechanism offers the plate 5 of pulling pin with the power that the application force of single acting oil cylinder 11 is converted into horizontal direction, makes it finish the action that level is pulled pin.Connecting rod mechanism comprises main connecting rod 3 and auxiliary connecting rod 4, and the two ends of main connecting rod 3 are articulated in respectively on pull pin plate 5 and the sliding seat 8, and the two ends of auxiliary connecting rod 4 are articulated in respectively on pull pin plate 5 and the bearing 1.Connecting rod mechanism offers the plate 5 of pulling pin with the power that the application force of single acting oil cylinder 11 is converted into horizontal direction, the action (shown in Fig. 6 left side) that makes it finish level and pull pin; And can automatically reset at the effect lower link mechanism and the single acting oil cylinder 11 of retracing spring 10, make the plate of pulling pin finish the action of horizontal latch.The pull pin moving direction of plate 5 of orienting lug 6,7 pairs of pilot bars limits, make the plate 5 of pulling pin to move in the horizontal direction and can not rotate, on orienting lug 6, self-locking device can be installed, self-locking device can obtain the motor message that orienting lug 6 provides, and the motion that self-locking device also can restricted guidance piece 6 simultaneously realizes lock function; Pulling pin plate 5 can parallel motion, bearing pins extracted during when the plate 5 of pulling pin telescopic boom is temporarily separated with its upper class arm to the center translation, after treating that telescopic oil cylinder drives this telescopic boom and finishes expanding-contracting action and put in place, pull pin plate 5 to the both sides translation, and bearing pins is released and turns back to pin-and-hole telescopic boom and its upper class arm are reconnected; Spring reset mechanism comprises the spring axis of guide 9 and retracing spring 10, and retracing spring 10 is sheathed between the spring axis of guide 9, and the spring axis of guide 9 links to each other with sliding seat 8.The spring axis of guide 9, retracing spring 10 are used to provide and transmit the power that resets to connecting rod mechanism and single acting oil cylinder 11.
Principle of work: referring to shown in Figure 4, the frame principles scheme drawing of push-pull structure of the present invention, represented connecting rod type carrying pin inserting mechanism for crane role in new type bolt mechanism among the figure, connecting rod type carrying pin inserting mechanism is subjected to the control of single acting oil cylinder 11, export the action of pulling pin with latch, output detection signal offers the detection of electrons element simultaneously, and with the action situation feed back to self-locking device, self-locking device also can carry out motion limits to it according to the action situation of retractable pin mechanism.Left side and the right side state of pulling pin and the latch state of plate 5 of representing respectively to pull pin among Fig. 5 and Fig. 6, sliding seat 8 level under the effect of single acting oil cylinder 11 travels forward among Fig. 6, pull pin plate 5 levels to the center translation by the connecting rod mechanism pulling simultaneously, with regard to the plate 5 residing states of pulling pin as left side among Fig. 6; The level under the effect of retracing spring of single acting oil cylinder 11 is moved backward after sliding seat 8 and the release, reset by the connecting rod mechanism plate 5 that promotes to pull pin simultaneously, just pulled pin plate 5 residing states as right side among Fig. 6, orienting lug 6 among Fig. 5 and pilot bar 7 make the sense of motion maintenance level always of the plate 5 of pulling pin in whole motion process.