CN103303269A - Extension and retraction mechanism and support leg extension and retraction system for concrete pump truck - Google Patents
Extension and retraction mechanism and support leg extension and retraction system for concrete pump truck Download PDFInfo
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- CN103303269A CN103303269A CN2012100655729A CN201210065572A CN103303269A CN 103303269 A CN103303269 A CN 103303269A CN 2012100655729 A CN2012100655729 A CN 2012100655729A CN 201210065572 A CN201210065572 A CN 201210065572A CN 103303269 A CN103303269 A CN 103303269A
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Abstract
The invention discloses an extension and retraction mechanism and a support leg extension and retraction system for a concrete pump truck, which relate to the technical field of engineering machinery and are used for solving the technical problems of low extension and retraction speeds and difficulty in maintaining existing in the prior art. The extension and retraction mechanism comprises a first moving part, a second moving part, a base body, an extension and retraction device and a first-stage linkage structure; the extension and retraction device comprises a first member and a second member; the first member can extend or retract relative to the second member along a predetermined direction; the first moving part is fixedly connected with the first member; the base body is fixedly connected with the second member; and the first moving part can be used for driving the second moving part to extend or retract relative to the first moving part along a predetermined direction through the first-stage linkage structure in an extension or retraction process. The support leg extension and retraction system for the concrete pump truck comprises the extension and retraction mechanism provided by the invention. Due to the adoption of the extension and retraction mechanism and the support leg extension and retraction system, the extension and retraction speeds of an extension and retraction support leg in the concrete pump truck are increased, the structure is simple, and the maintenance difficulty is lowered.
Description
Technical field
The present invention relates to technical field of engineering machinery, the concrete pump truck supporting leg telescopic system that is specifically related to a kind of telescoping mechanism and this telescoping mechanism is set.
Background technology
Concrete pump truck is the mechanical equipment that concrete pumping unit and cloth arm are housed on a kind of power actuated vehicle chassis simultaneously.Concrete pump truck telescopic outrigger (being called for short supporting leg or Retractive leg) is to support whole concrete pump truck, prevents the framing member that concrete pump truck is tumbled when work.
For making telescopic outrigger at flexible supporting leg mode of operation and the car load motoring condition of reaching of predetermined direction, be provided with the supporting leg telescopic system in the concrete pump truck specially, the telescoping mechanism in the supporting leg telescopic system (or claiming retractor device) is exclusively used in and drives supporting leg and stretch out or bounce back in predetermined direction.
At present, existing supporting leg telescopic system generally adopts double hydraulic cylinder (hydraulic actuating cylinder also claims oil cylinder) telescopic system, and Fig. 1 shows a kind of existing double hydraulic cylinder telescopic system (being called for short the twin-tub system).
As shown in Figure 1, existing double hydraulic cylinder telescopic system, comprise one-level Retractive leg 11, secondary Retractive leg 12, one-level Retractive leg cylinder support 13, secondary Retractive leg cylinder support 14, one-level telescopic oil cylinder 15, secondary telescopic oil cylinder 16, rotary table cylinder support 17 and a plurality of bearing pin 181,182,183,184, wherein:
Be connected by bearing pin 181 between the cylinder barrel of one-level telescopic oil cylinder 15 and the one-level Retractive leg cylinder support 13, be connected by bearing pin 184 between the piston rod of one-level telescopic oil cylinder 15 and the rotary table cylinder support 17.
Be connected by bearing pin 182 between the piston rod of secondary telescopic oil cylinder 16 and the secondary leg telescopic oil cylinder bearing 14, be connected by bearing pin 183 between the cylinder barrel of secondary telescopic oil cylinder 16 and the one-level leg oil cylinder telescopic oil cylinder bearing 13.
In the flexible process of the cylinder barrel of the cylinder barrel of one-level telescopic oil cylinder 15 or secondary telescopic oil cylinder 16 with respect to its piston rod separately, rotary table cylinder support 17 maintains static, cylinder barrel or piston rod can drive one-level Retractive leg 11 or secondary Retractive leg 12 left or right-hand motion in Fig. 1, thereby realize stretching out or bounce back (or claiming withdrawal) of one-level Retractive leg 11, secondary Retractive leg 12.One-level Retractive leg 11 and secondary Retractive leg 12 flexible has succession, and the two can not realize action simultaneously.
There is following technical matters at least in existing double hydraulic cylinder telescopic system:
On the one hand, the one-level Retractive leg in the existing supporting leg telescopic system has succession with the fore and aft motion of secondary Retractive leg, can not realize simultaneously that same action namely can not stretch out or bounce back the while in the same direction, causes stretching speed slow.
On the other hand, the hydraulic efficiency pressure system of the two oil cylinder forms that adopt in the existing supporting leg telescopic system not only complex structure, cost height, be difficult to layout, and leakage of oil point is many.In telescopic process, the length of hydraulic tubing can be according to the flexible respective change of doing of oil cylinder and supporting leg, and hydraulic tubing is subjected to supporting leg extruding easily and damages in supporting leg inside, makes supporting leg telescopic system poor stability, simultaneously, because two oil cylinder form hydraulic efficiency pressure systems take than large space, damage back service clearance deficiency, just can keep in repair after supporting leg need being extracted, maintenance process is very difficult, maintainer's labour intensity is bigger, and maintenance cycle is long, causes maintenance difficulty bigger.
Summary of the invention
The objective of the invention is the concrete pump truck supporting leg telescopic system that proposes a kind of telescoping mechanism and this telescoping mechanism is set.Solve prior art and had the technical matters that stretching speed is slow, maintenance difficulty is bigger.
For achieving the above object, the invention provides following technical scheme:
Telescoping mechanism among the application comprises first movement parts, second movement parts, pedestal, telescopic mounting and first order linkage structure, wherein:
Described telescopic mounting comprises first member and second member, and described first member can stretch out or bounces back along predetermined direction with respect to described second member;
Described first movement parts is captiveed joint with an end of described first member, and described pedestal is captiveed joint with an end of described second member;
Described first order linkage structure is arranged between described pedestal, described first movement parts and described second movement parts, and described first movement parts is stretched out or retraction process in can drive described second movement parts by described first order linkage structure and stretch out with respect to described first movement parts or bounce back along described predetermined direction.
Preferably, described first order linkage structure comprises first pulley that is installed in described first member, one end, second pulley that is in the described first movement parts end lower edge and pulling force transmission rope band, wherein:
The pulley body that described first pulley and described second pulley include framework and flexibly connect with described framework, described this physical efficiency of pulley is rotated with respect to described framework around the active connection place of itself and described framework;
The framework of described first pulley is captiveed joint with an end of described first member, and the framework of described second pulley is captiveed joint with the end lower edge of described first movement parts;
Captive joint with described pedestal and a belt body regulating plate of fixing respectively in the two ends of described pulling force transmission rope band, and the stage casing part of described pulling force transmission rope band is walked around the pulley body of described first pulley and the pulley body of described second pulley.
Preferably, the framework of described first pulley is captiveed joint by first fastener with described first member, the flexible parts of clamping between the framework of described first pulley and described first member.
Preferably, described first movement parts is socketed on outside described second movement parts, described first member is embedded in described second movement parts, also be provided with roller on the framework of described first pulley, the framework of described roller and described first pulley flexibly connects, and described roller can rotate by the framework with respect to described first pulley around the active connection place of the framework of itself and described first pulley, and described roller and described second movement parts connect.
Preferably, described pulling force transmission rope band comprises first belt body and second belt body, and described first belt body and described second belt body include first termination, second termination and the stage casing part between described first termination, described second termination, wherein:
All captive joint with described second movement parts in described first belt body and described second belt body described first termination separately;
Captiveing joint with described pedestal in second termination of described first belt body, captives joint with fixing described belt body regulating plate in second termination of described second belt body;
The stage casing part of described first belt body is walked around the pulley body of described first pulley, and the stage casing part of described second belt body is walked around the pulley body of described second pulley.
Preferably, be fixedly connected with the butt joint base plate on described second movement parts, described first belt body and described second belt body described first termination separately be embedded in two different first plate bodys respectively and respectively with different two described first plate body captive joints, second fastener passes the positioning through hole and the described base plate captive joint that docks that is opened on described first plate body;
Be installed with locating bush on described second termination of described second belt body, offer outside thread on the described locating bush, the outside thread that described locating bush passes on the part of described belt body regulating plate is connected with nut thread.
Preferably, described first belt body and/or described second belt body are the rope row that the above steel rope of two bundles constitutes;
And/or, described first member is captiveed joint by first bearing pin with described first movement parts, described second member is captiveed joint by second bearing pin with described pedestal, described second termination of described first belt body is embedded in second plate body and with described second plate body captives joint, and described second plate body is captiveed joint by the 3rd bearing pin with described pedestal.
Preferably, described telescopic mounting is oil cylinder, the cylinder barrel that described first member is described oil cylinder or piston rod one of them, the cylinder barrel that described second member is described oil cylinder or piston rod wherein another;
Perhaps, described telescopic mounting is electric pushrod, the shell that described first member is described electric pushrod or push rod one of them, the shell that described second member is described electric pushrod or push rod wherein another.
Preferably, described telescoping mechanism also comprises the 3rd movement parts and second stage linkage structure, wherein:
Described second movement parts is socketed on outside described the 3rd movement parts;
Described second stage linkage structure is arranged between described pedestal, described second movement parts and described the 3rd movement parts, and described second movement parts can drive described the 3rd movement parts by described second stage linkage structure and stretch out with respect to described second movement parts or bounce back along described predetermined direction.
The concrete pump truck supporting leg telescopic system that the application provides comprises the described telescoping mechanism of the arbitrary embodiment of the present invention, wherein:
The one-level telescopic outrigger that described first movement parts is concrete pump truck;
The secondary telescopic outrigger that described second movement parts is described concrete pump truck;
Described pedestal is the rotary table of described concrete pump truck;
Described telescopic mounting is oil cylinder, and described first member is the cylinder barrel of described oil cylinder, and described second member is the piston rod of described oil cylinder.
Based on the arbitrary technical scheme in the technique scheme, the embodiment of the invention can produce following technique effect at least:
Because in the telescoping mechanism provided by the present invention, first member (for example cylinder barrel of oil cylinder) can stretch out or bounces back along predetermined direction with respect to second member (for example piston rod of oil cylinder), first movement parts (for example one-level telescopic outrigger of concrete pump truck) is captiveed joint with first member, so first movement parts can be stretched out with respect to the predetermined direction in second member edge under the drive of first member or bounce back, simultaneously, first movement parts stretch out or retraction process in can also drive second movement parts (for example secondary telescopic outrigger of concrete pump truck) by first order linkage structure and stretch out with respect to first movement parts or bounce back along predetermined direction, so first movement parts stretch out along predetermined direction with respect to second member or the process that bounces back in, can be in the lump drive second movement parts by first order linkage structure and stretch out with respect to first movement parts or bounce back along predetermined direction, namely the while (synchronously) stretches out or bounces back only to need a telescopic mounting (for example an oil cylinder or an electric pushrod) just can realize the interlock of first movement parts and second movement parts thus.
In the time of in telescoping mechanism provided by the present invention is applied to concrete pump truck supporting leg telescopic system, only need an oil cylinder as telescopic mounting, just can realize the interlock of one-level telescopic outrigger and the secondary telescopic outrigger of concrete pump truck, compared with prior art, because stretching out simultaneously or bounce back of one-level telescopic outrigger and secondary telescopic outrigger, so stretching speed is faster, in addition, only need to use an oil cylinder, that is to say only needs to use single cylinder system, single cylinder system is with respect to the two cylinder systems that use in the prior art, not only simple in structure, cost is low, be convenient to arrange, leakage of oil point less, and the inside of telescopic outrigger is difficult for being extruded and damages, telescopic system stability is better, it is also smaller to take up room, even it is also relatively more sufficient to damage the back service clearance, and more convenient maintenance, maintenance difficulty is lower, exists stretching speed slow so solved prior art, the technical matters that maintenance difficulty is bigger.
Many technical schemes that the invention described above provides can produce following advantage at least:
1, concrete pump truck supporting leg telescopic system of the present invention adopts single oil cylinder, hydraulic efficiency pressure system is simple, leakage of oil point less, cost is low, and single oil cylinder and its hydraulic efficiency pressure system take up room little, because service clearance is bigger, so can directly keep in repair in the rear end of telescopic outrigger, need not telescopic outrigger is extracted during et out of order, reduce maintainer's labour intensity, shortened maintenance cycle.
2, the present invention can realize that two-stage or multi-stage expansion supporting leg move simultaneously, and contraction time has shortened one times, has improved operating efficiency.
3, concrete pump truck supporting leg telescopic system overall structure of the present invention is simple, rate of breakdown is little, good stability;
4, telescoping mechanism provided by the present invention adopts adjustable rope row mechanism, can offset manufacturing errors and assembly error.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the scheme drawing of annexation of the chief component of existing double hydraulic cylinder telescopic system;
The scheme drawing of the annexation of the chief component of the telescoping mechanism that Fig. 2 provides for the preferred embodiment of the present invention;
Fig. 3 is the decomposing schematic representation of first belt body shown in Fig. 2, telescopic mounting, second belt body, first pulley, second pulley and roller;
Fig. 4 is the decomposing schematic representation between telescopic mounting shown in Fig. 2 and first movement parts, second movement parts and the pedestal;
Fig. 5 is first termination of first belt body shown in Fig. 2, first termination, second fastener and first plate body and the decomposing schematic representation that docks base plate of second belt body;
Fig. 6 is the decomposing schematic representation of second termination of second belt body shown in Fig. 2 and locating bush, belt body regulating plate, nut.
The specific embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
The embodiment of the invention provide a kind of stretching speed fast, take up room little, simple in structure, not fragile, and the telescoping mechanism of being more convenient for keeping in repair and concrete pump truck supporting leg telescopic system that this telescoping mechanism is set.
As Fig. 2～shown in Figure 6, the telescoping mechanism that the embodiment of the invention provides, comprise as shown in Figure 2 first movement parts (being the one-level telescopic outrigger among Fig. 2), 21, second movement parts (being the secondary telescopic outrigger among Fig. 2) 22, pedestal (being rotary table among Fig. 2) 23, telescopic mounting (among Fig. 2 be example with the oil cylinder) 24 and first order linkage structure 25, wherein:
Telescopic mounting 24 comprises that first member (being the cylinder barrel of oil cylinder among Fig. 2) 241 and second member (being the piston rod of oil cylinder among Fig. 2), 242, the first members 241 can stretch out or bounce back along predetermined direction with respect to second member 242.First movement parts 21 is captiveed joint with an end of first member 241, and pedestal 23 is captiveed joint with an end of second member 242.
First order linkage structure 25 is arranged between pedestal 23, first movement parts 21 and second movement parts 22, and first movement parts 21 is stretched out or retraction process in can drive second movement parts 22 by first order linkage structure 25 and stretch out with respect to first movement parts 21 or bounce back along predetermined direction.
In the telescoping mechanism provided by the present invention, first member 241 can stretch out or bounces back along predetermined direction with respect to second member 242, first movement parts 21 is captiveed joint with an end of first member 241, so first movement parts 21 can be stretched out with respect to the predetermined direction in second member, 242 edges under the drive of first member 241 or bounce back.
Simultaneously, first movement parts 21 stretch out or retraction process in can also drive second movement parts 22 by first order linkage structure 25 and stretch out with respect to first movement parts 21 or bounce back along predetermined direction, so first movement parts 21 stretch out along predetermined direction with respect to second member 242 or the process that bounces back in, can stretch out with respect to first movement parts 21 by the predetermined direction in first order linkage structure 25 drive second movement parts, 22 edges in the lump or bounce back, only need a telescopic mounting 24 can realize that just the interlock of first movement parts 21 and second movement parts 22 is that (synchronously) stretches out or bounce back simultaneously thus.
In the said structure, first movement parts 21 both can drive second movement parts 22 by first order linkage structure 25 and stretch out with respect to first movement parts 21 along the direction of being scheduled in the process of stretching out, first movement parts 21 can drive second movement parts 22 by first order linkage structure 25 again and bounce back with respect to first movement parts 21 along predetermined direction in retraction process.
Certainly, first movement parts 21 also can only be stretched out (at this moment with respect to first movement parts 21 along predetermined direction by first order linkage structure 25 drives second movement parts 22 in the process of stretching out in the present embodiment, retraction can use other structures to realize), in like manner, first movement parts 21 also can be only in retraction process by first order linkage structure 25 drive second movement parts 22 along predetermined direction with respect to first movement parts, 21 retractions (at this moment, stretch out can use other structures to realize).
As shown in Figures 2 and 3, first order linkage structure 25 comprises first pulley 251 that is installed in first member, 241 1 ends, second pulley 252 that is in first movement parts, 21 end lower edges and pulling force transmission rope band 253 in the present embodiment, wherein:
The framework 2510 of first pulley 251 is captiveed joint with an end of first member 241, and the framework 2520 of second pulley 252 is captiveed joint with the end lower edge of first movement parts 21.
Captive joint with pedestal 23 and a belt body regulating plate 262 of fixing respectively in the two ends of pulling force transmission rope band 253, and the stage casing part of pulling force transmission rope band 253 is walked around the pulley body 2511 of first pulley 251 and the pulley body 2521 of second pulley 252.
As shown in Figures 2 and 3, described pulling force transmission rope band 253 preferably includes first belt body 2531 and second belt body 2532.When first movement parts 21 when predetermined direction is stretched out (towards right motion) or retraction (towards left movement) in the drive lower edge of first member 241 of telescopic mounting 24, first member 241 drives first pulley 251 simultaneously and stretches out or bounce back along predetermined direction, when first movement parts 21 is stretched out in the predetermined direction in the drive lower edge of first member 241 of telescopic mounting 24, first pulley 251 is towards right motion and promote first belt body 2531 that pulling force transmits rope band 253, first belt body 2531 pullings, second movement parts 22 by pulling force transmission rope band 253 is stretched out in the lump, first movement parts 21 is when the direction retraction that the drive lower edge of first member 241 of telescopic mounting 24 is scheduled to, second pulley 252 is towards left movement and promote second belt body 2532 that pulling force transmits rope band 253, by second belt body, 2532 pullings, second movement parts, 22 retractions of pulling force transmission rope band 253.
The framework 2510 of first pulley 251 and first member 241 are captiveed joint by first fastener 254 as shown in Figure 3 in the present embodiment, the flexible parts of clamping (for example spring washer) 255 between the framework 2510 of first pulley 251 and first member 241, elastomeric element 255 are subjected to the extruding of the framework 2510 of first pulley 251 and first member 241 and are out of shape.Elastomeric element 255 is preferably and uses the spring washer be socketed on first fastener 254, also can be Rubber shock-absorbing pad, and elastomeric element 255 has the be hit effect on surface of buffering, damping and protection parts.First fastener 254 is preferably and uses bolt or screw.
Because roller 256 and second movement parts 22 connect, towards right (stretching out) or in the process of a left side (retraction) motion, roller 256 can roll left moving towards right or court along the inside face of second movement parts 22 at first member, 241 drives, first pulley 251.The effect that roller 256 can play guiding to first member 241 of telescopic mounting 24, support.
Pulling force transmission rope band 253 comprises first belt body 2531 and second belt body 2532 as shown in Figure 3 in the present embodiment, first belt body 2531 and second belt body 2532 include first termination, second termination and the stage casing part between first termination, second termination, wherein:
All captive joint with second movement parts 22 as shown in Figure 1 in first termination of first termination of first belt body 2531 and second belt body 2532.Captiveing joint with pedestal 23 in second termination of first belt body 2531, captives joint with fixing belt body regulating plate 262 in second termination of described second belt body 2532.
The stage casing part of first belt body 2531 is walked around the pulley body 2511 of first pulley 251.
The stage casing part of second belt body 2532 is walked around the pulley body 2521 of second pulley 252.
Said structure makes that installation, dismounting, the maintenance of pulling force transmission rope band 253 are more convenient.
As Fig. 2 and shown in Figure 5, be fixedly connected with butt joint base plate 221 in the present embodiment on second movement parts 22, first belt body 2531 and second belt body 2532, first termination separately are inserted into respectively in two different first plate bodys 220 regularly, second fastener (can be bearing pin, screw or bolt) 222 by be opened on described two first plate bodys 220 positioning through hole with dock base plate 221 captive joints.
This structure make between the belt body 2531 of winning, second belt body 2532 and second movement parts 22 be connected more simple, convenient.
As Fig. 2 and shown in Figure 6, be installed with locating bush 261 on second termination of second belt body 2532 in the present embodiment, offer outside thread on the end of locating bush 261, and locating bush 261 is threaded with the negative thread of making in the belt body regulating plate of fixing 262 by described outside thread.The outside thread that locating bush 261 passes on the part of belt body regulating plate 262 is threaded with nut 263.
Because to be threaded be the structure that a kind of tightness can be regulated, so can realize the adjusting of 2532 pairs of second pulleys of second belt body, 252 level of tightness by the tightness that adjusting is threaded.What is more important: said structure can be offset manufacturing errors and the assembly error of second belt body 2532.
Certainly, also locating bush can be set on second termination of first belt body 2531, at this moment, the locating bush on second termination of first belt body 2531 can be threaded with pedestal 23 along the axial direction of first belt body 2531.
Rope row has the advantage that cost is low, intensity is high.Certainly, rope row also can constitute for the rope band 253 of other materials.
As Fig. 2 and shown in Figure 5, second termination of first belt body 2531 is embedded in second plate body 233 and with second plate body 233 and captives joint in the present embodiment, and second plate body 233 is captiveed joint by the 3rd bearing pin 273 with pedestal 23.First member 241 and first movement parts 21 are captiveed joint by first bearing pin 271 as shown in Figure 4, first member 241 be preferably be fixedly arranged on first movement parts 21 on cylinder support 211 captive joint by first bearing pin 271.Second member 242 passes this second member with pedestal 23 by second bearing pin 272 captives joint with the respective through hole on the pedestal.Bearing pin connects not only easy for installation, and dismounting is also than being easier to.
Telescopic mounting 24 is preferably oil cylinder in the present embodiment, and first member 241 is the cylinder barrel of oil cylinder, and second member 242 is the oil cylinder piston bar.But also can be according to application and the piston rod of oil cylinder is used as first member 241, and the cylinder barrel of oil cylinder be used as described second member.It is big that oil cylinder has the weight of bearing, and safe and reliable advantage.
Certainly, adopt in the present embodiment electric pushrod as telescopic mounting 24 with the technical scheme that substitutes oil cylinder also within protection scope of the present invention.In this case, first member 241 be the shell of electric pushrod or push rod one of them, second member 242 be the shell of electric pushrod or push rod wherein another.
As further improvement of this embodiment, telescoping mechanism also comprises the 3rd movement parts and second stage linkage structure in the present embodiment, and wherein: second movement parts 22 is socketed on outside the 3rd movement parts (not shown) as shown in Figure 2.Second stage linkage structure (not shown) is arranged between pedestal 23, second movement parts 22 and the 3rd movement parts, and second movement parts 22 can drive the 3rd movement parts by second stage linkage structure and stretch out with respect to second movement parts 22 or bounce back along predetermined direction.
The setting of above-mentioned secondary linkage structure and the 3rd movement parts makes telescoping mechanism realize the flexible of three movement parts, and when being three grades of telescopic outriggers of concrete pump truck as if the 3rd movement parts, said structure can also be realized the flexible of three grades of telescopic outriggers.Second stage linkage structure specifically can be set to similar first order linkage structure 25, also can be set to other linkage structures.
Certainly, telescoping mechanism can also arrange the 4th movement parts and third stage linkage structure, the 5th movement parts and fourth stage linkage structure and even N (N is the natural number greater than 5) movement parts and (N-1) level johning knot structure in the present embodiment.At this moment, this structure can realize the flexible of N movement parts, if during the N level telescopic outrigger that N movement parts is concrete pump truck, just can realize stretching of N level telescopic outrigger.
As shown in Figure 2, the concrete pump truck supporting leg telescopic system that the embodiment of the invention provides comprises the telescoping mechanism that the arbitrary technical scheme of the invention described above provides, wherein:
Telescopic mounting 24 is preferably oil cylinder, and first member 241 is preferably the cylinder barrel of oil cylinder, and second member 242 is preferably the piston rod of oil cylinder.
When telescoping mechanism comprised second stage linkage structure and the 3rd movement parts, the 3rd movement parts can be three grades of telescopic outriggers of concrete pump truck, and at this moment, said structure can also be realized the flexible of three grades of telescopic outriggers.When telescoping mechanism comprises N movement parts and (N-1) level johning knot structure.At this moment, said structure can be realized the flexible of N level telescopic outrigger.
Because stretching out simultaneously or bounce back of one-level telescopic outrigger and secondary telescopic outrigger, so stretching speed is faster, in addition, only need to use an oil cylinder, that is to say only needs to use single cylinder system, single cylinder system is with respect to the two cylinder systems that use in the prior art, not only simple in structure, cost is low, be convenient to arrange, leakage of oil point less, and the inside of telescopic outrigger is difficult for being extruded and damages, telescopic system stability is better, it is also smaller to take up room, even it is also relatively more sufficient to damage the back service clearance, and the maintenance of being more convenient for.
Unless otherwise indicated, term captive joint among the application all can be understood as: (for example using bolt, screw or bearing pin to connect) removably connects, also can be understood as: non-removable captive joint (for example welding), certainly, connection fastened to each other also can be replaced (obviously can't adopt except the integrally formed technology) by integral structure (for example use foundry technique is integrally formed to create).
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (10)
1. a telescoping mechanism is characterized in that, comprises first movement parts, second movement parts, pedestal, telescopic mounting and first order linkage structure, wherein:
Described telescopic mounting comprises first member and second member, and described first member can stretch out or bounces back along predetermined direction with respect to described second member;
Described first movement parts is captiveed joint with an end of described first member, and described pedestal is captiveed joint with an end of described second member;
Described first order linkage structure is arranged between described pedestal, described first movement parts and described second movement parts, and described first movement parts is stretched out or retraction process in can drive described second movement parts by described first order linkage structure and stretch out with respect to described first movement parts or bounce back along described predetermined direction.
2. telescoping mechanism according to claim 1 is characterized in that, described first order linkage structure comprises first pulley that is installed in described first member, one end, second pulley that is in the described first movement parts end lower edge and pulling force transmission rope band, wherein:
The pulley body that described first pulley and described second pulley include framework and flexibly connect with described framework, described this physical efficiency of pulley is rotated with respect to described framework around the active connection place of itself and described framework;
The framework of described first pulley is captiveed joint with an end of described first member, and the framework of described second pulley is captiveed joint with the end lower edge of described first movement parts;
Captive joint with described pedestal and a belt body regulating plate of fixing respectively in the two ends of described pulling force transmission rope band, and the stage casing part of described pulling force transmission rope band is walked around the pulley body of described first pulley and the pulley body of described second pulley.
3. telescoping mechanism according to claim 2 is characterized in that, the framework of described first pulley is captiveed joint by first fastener with described first member, the flexible parts of clamping between the framework of described first pulley and described first member.
4. telescoping mechanism according to claim 3, it is characterized in that, described first movement parts is socketed on outside described second movement parts, described first member is embedded in described second movement parts, also be provided with roller on the framework of described first pulley, the framework of described roller and described first pulley flexibly connects, and described roller can be around itself and the framework rotation with respect to described first pulley of the active connection place of the framework of described first pulley, and described roller and described second movement parts connect.
5. telescoping mechanism according to claim 4, it is characterized in that, described pulling force transmission rope band comprises first belt body and second belt body, described first belt body and described second belt body include first termination, second termination and the stage casing part between described first termination, described second termination, wherein:
All captive joint with described second movement parts in described first belt body and described second belt body described first termination separately;
Captiveing joint with described pedestal in second termination of described first belt body, captives joint with fixing described belt body regulating plate in second termination of described second belt body;
The stage casing part of described first belt body is walked around the pulley body of described first pulley, and the stage casing part of described second belt body is walked around the pulley body of described second pulley.
6. telescoping mechanism according to claim 5, it is characterized in that, be fixedly connected with the butt joint base plate on described second movement parts, described first belt body and described second belt body described first termination separately be embedded in two different first plate bodys respectively and respectively with different two described first plate body captive joints, second fastener passes the positioning through hole and the described base plate captive joint that docks that is opened on described first plate body;
Be installed with locating bush on described second termination of described second belt body, offer outside thread on the described locating bush, the outside thread that described locating bush passes on the part of described belt body regulating plate is connected with nut thread.
7. telescoping mechanism according to claim 6 is characterized in that, described first belt body and/or described second belt body are the rope row that the above steel rope of two bundles constitutes;
And/or, described first member is captiveed joint by first bearing pin with described first movement parts, described second member is captiveed joint by second bearing pin with described pedestal, described second termination of described first belt body is embedded in second plate body and with described second plate body captives joint, and described second plate body is captiveed joint by the 3rd bearing pin with described pedestal.
8. telescoping mechanism according to claim 7 is characterized in that, described telescopic mounting is oil cylinder, the cylinder barrel that described first member is described oil cylinder or piston rod one of them, the cylinder barrel that described second member is described oil cylinder or piston rod wherein another;
Perhaps, described telescopic mounting is electric pushrod, the shell that described first member is described electric pushrod or push rod one of them, the shell that described second member is described electric pushrod or push rod wherein another.
9. telescoping mechanism according to claim 8 is characterized in that, described telescoping mechanism also comprises the 3rd movement parts and second stage linkage structure, wherein:
Described second movement parts is socketed on outside described the 3rd movement parts;
Described second stage linkage structure is arranged between described pedestal, described second movement parts and described the 3rd movement parts, and described second movement parts can drive described the 3rd movement parts by described second stage linkage structure and stretch out with respect to described second movement parts or bounce back along described predetermined direction.
10. a concrete pump truck supporting leg telescopic system is characterized in that, comprises the arbitrary described telescoping mechanism of claim 1-9, wherein:
The one-level telescopic outrigger that described first movement parts is concrete pump truck;
The secondary telescopic outrigger that described second movement parts is described concrete pump truck;
Described pedestal is the rotary table of described concrete pump truck;
Described telescopic mounting is oil cylinder, and described first member is the cylinder barrel of described oil cylinder, and described second member is the piston rod of described oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100655729A CN103303269A (en) | 2012-03-14 | 2012-03-14 | Extension and retraction mechanism and support leg extension and retraction system for concrete pump truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100655729A CN103303269A (en) | 2012-03-14 | 2012-03-14 | Extension and retraction mechanism and support leg extension and retraction system for concrete pump truck |
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| CN103303269A true CN103303269A (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100655729A Pending CN103303269A (en) | 2012-03-14 | 2012-03-14 | Extension and retraction mechanism and support leg extension and retraction system for concrete pump truck |
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| CN (1) | CN103303269A (en) |
Cited By (4)
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| CN103466253A (en) * | 2013-10-10 | 2013-12-25 | 徐州徐工施维英机械有限公司 | Telescoping mechanism, belt conveyor and crushing and screening device |
| CN104002775A (en) * | 2014-06-09 | 2014-08-27 | 安徽星马专用汽车有限公司 | Concrete pump truck and support device thereof |
| CN104389851A (en) * | 2014-11-20 | 2015-03-04 | 徐州徐工施维英机械有限公司 | Hydraulic limiting device and concrete pump truck |
| CN115649123A (en) * | 2022-11-08 | 2023-01-31 | 吉林大学 | Arc-shaped two-stage telescopic concrete pump truck supporting leg structure |
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Application publication date: 20130918 |