CN202391133U

CN202391133U - Latch hook assembly, folding arm support of engineering machinery and concrete pumping equipment

Info

Publication number: CN202391133U
Application number: CN2011205564248U
Authority: CN
Inventors: 邝昊; 李乡安
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2011-12-27
Filing date: 2011-12-27
Publication date: 2012-08-22
Anticipated expiration: 2021-12-27

Abstract

The utility model discloses a latch hook subassembly that is used for first object and second object of hook lock relative motion, including setting up first latch hook and the second latch hook on first object and second object respectively, first latch hook and second latch hook set up relatively and homoenergetic move about elastically, and wherein, through the relative motion of first object and second object, first latch hook can make first latch hook and/or second latch hook elastic motion along the relative slip of second latch hook to make first latch hook selectively hook lock or break away from the second latch hook. The utility model also discloses an use the utility model provides a folding cantilever crane of engineering machine tool of latch hook subassembly can prevent effectively that folding cantilever crane from the flagging of festival arm under fold condition. In addition the utility model also discloses an use the utility model provides a concrete pumping equipment of engineering machine's folding cantilever crane.

Description

The foldable arm rack of lock hook assembly, engineering machinery and concrete pumping equipment

Technical field

The utility model relates to two object hook lock fields together, particularly, relates to a kind of lock hook assembly, uses foldable arm rack and the concrete pumping equipment that uses this foldable arm rack of the engineering machinery of this lock hook assembly.

Background technology

In every field, two relative motion objects need hook lock situation together a lot.For example, in the foldable arm rack of concrete pumping equipment,, transport with convenient because after hours, two adjacent arm joints need fold.Yet as shown in Figure 1, the first arm 61 is hinged on the end of second arm 62, and carries out rotatablely moving with respect to second arm 62 through driving oil cylinder 7.After foldable arm rack work was accomplished, the first arm 61 need be folded in the below of second arm 62.Because the effect of gravity, the first arm 61 phenomenon that the meeting generation moves downward away from second arm 62 in processes such as transportation, promptly sagging distortion takes place in the first arm 61.This sagging distortion can cause interference to miscellaneous part especially, when especially the first arm 61 is long-armed this distortion more obvious, also can cause driving oil cylinder 7 to lose efficacy when serious, cause unnecessary loss.

In the prior art, in order to overcome this sagging distortion, when the theoretical folding position of design the first arm 61, just can take into account sag of chain usually; Promptly shown in the dotted portion among Fig. 1; Through the driving of driving oil cylinder 7, design the first arm 61 theoretical folding positions to such an extent that distance second arm 62 is nearer, when sagging distortion takes place the first arm 61, to compensate its sag of chain; Thereby make the first arm 61 not cause interference, can normally use miscellaneous part.

Yet, because driving oil cylinder 7 drives the first arm 61 more near second arm 62, therefore when this two arms joint is not also opened; If generation needs the horizontal level of second arm from Fig. 1 to rise to the situation of vertical position; In the rise process of second arm 62, in motion process, the sagging distortion of the first arm 61 can diminish gradually; Gravity is more and more littler to its sagging deformation effect, means the first arm 61 sagging distortion resilience gradually in motion process.Therefore; Since the first arm 61 more near the design of second arm 62, make the first arm 61 and second arm 62 to press together, if the situation that the lower cover of second arm, 62 arms is extruded distortion will appear in press section bit comparison weakness; Thereby cause second arm 62 to damage, and influence is used.Therefore thisly overcome the sagging method of the first arm and impracticable.In addition, when the using compensation method solved the sagging problem on deformation of jib, the stroke of making the driving oil cylinder 7 of compensation scheme can be greater than the stroke of not making compensation scheme, thereby the weight of driving oil cylinder 7 can more weigh, and was unfavorable for the boom system loss of weight;

Do not use foldable arm rack in addition as for a long time,, make driving oil cylinder 7 lose efficacy gradually, the pulling force to the first arm 61 can't be provided, thereby cause boom system to open the initiation security incident by nature because hydraulic system can more or less be leaked in actual conditions.Therefore, need a kind of auxiliary locking device, with the first arm 61 removably regularly on second arm 62.Promptly do not use and when folding, the first arm 61 can be fixed on second arm 62 when jib, and when using, the first arm 61 again can with 62 disengagings of second arm.But this will inevitably cause the not convenient of operation, needs special personnel to carry out the fixing and disengaging between the arm joint, and operating efficiency is reduced.

To sum up; Provide a kind of can either be through the relative motion of the first arm 61 and second arm 62 self; Just the first arm 61 is fixed on second arm 62, can realizes that the fastening devices of the disengaging between the first arm 61 and second arm 62 has positive effect through the first arm 61 and second arm 62 self relative motion again.

The utility model content

A purpose of the utility model provides a kind of lock hook assembly, and this lock hook assembly can make first object and second object that are provided with this lock hook assembly in the process of relative motion, realize mutual hook lock or disengaging automatically, and simple in structure, practical.

Another order of the utility model provides a kind of foldable arm rack of engineering machinery; The lock hook assembly that this foldable arm rack uses the utility model to provide; Make the alternate arm joint of foldable arm rack when relative motion, can hook lock and disengaging, can either prevent sagging distortion; Do not influence jib again and launch, practicality is high.

Another purpose of the utility model provides a kind of concrete pumping equipment, and this concrete pumping equipment comprises the foldable arm rack of the engineering machinery that the utility model provides.

To achieve these goals; The utility model provides a kind of lock hook assembly; This lock hook assembly is used for first object and second object that hook lock can relative motion; Said lock hook assembly comprises first latch hook and second latch hook that is oppositely arranged, and said first latch hook is arranged on first object and flexibly activity, and second latch hook is arranged on second object and flexibly activity; Wherein, Through the relative motion of said first object and said second object, said first latch hook can make said first latch hook and/or said second latch hook flexibly movable along the relative slip of said second latch hook, so that said first latch hook hook lock or break away from said second latch hook selectively.

Preferably, the angle of the latch hook face of the latch hook face of said first latch hook and said second latch hook is 20 °-90 °.

Preferably; Be fixed with first on said first object; Said second object relatively is fixed with second; This first and second axial angle is 90 °, is arranged on this first but said first latch hook passes said first and resilient movement ground, also is arranged on this second to resilient movement but said second latch hook passes said second.

Preferably; Said first latch hook circumferentially is arranged on said first regularly; Said second latch hook can be along said second resilient movement through second spring part, and said first latch hook is formed with the slip latch hook end that can slide along the front end of said second latch hook.

Preferably, said slip latch hook end is an arc structure.

Preferably; The latch hook structure of said second latch hook comprises latch hook end and cardinal extremity; Said latch hook end is provided with the elastic baffle of the said latch hook structure of sealing, and an end of this elastic baffle is pressed against on the said cardinal extremity, and said first latch hook can be along said first resilient movement through first spring part; Said second latch hook circumferentially is arranged on said second regularly, and the said latch hook end inboard of said second latch hook is formed with and leads to said cardinal extremity sliding bevel.

Preferably, said sliding bevel is a plane structure.

Preferably; Said first is special-shaped axis with said second; This special-shaped axis is separately fixed on said first object and second object through support member, and correspondingly is formed with the profiled holes with this special-shaped axis form fit on said first latch hook and said second latch hook.

Preferably, said first latch hook and said second latch hook comprise respectively can hard to bear urgent elastic deformation elastic portion, and said first latch hook is fixedly installed on first object, said second latch hook is fixedly installed on second object.

Preferably, said first latch hook is formed with the slip latch hook end that can slide along the front end of said second latch hook.

Preferably; The latch hook structure of said second latch hook comprises latch hook end and cardinal extremity; Said latch hook end is provided with the elastic baffle of the said latch hook structure of sealing; One end of this elastic baffle is pressed against on the said cardinal extremity, and the said latch hook end inboard of said second latch hook is formed with and leads to said cardinal extremity sliding bevel.

Another aspect according to the utility model; A kind of foldable arm rack of engineering machinery is provided; This foldable arm rack comprises the first arm and second arm hinged with this first arm, and said foldable arm rack comprises the lock hook assembly that the utility model provides, wherein; First object is a first arm, and second object is second arm.

Preferably, said second arm is for work as forearm, and said the first arm is to be hinged on the following joint arm that deserves forearm, and the said arm of joint down rotates when forearm around said through driving oil cylinder.

According to the utility model more on the one hand, a kind of concrete pumping equipment is provided, this concrete pumping equipment comprises foldable arm rack, said foldable arm rack is the foldable arm rack of the engineering machinery that provides of the utility model.

Pass through technique scheme; But first latch hook of the lock hook assembly that provides through the utility model and second latch hook are owing to be located to resilient movement on first object and second object respectively; Relative slip through first latch hook and second latch hook can make first latch hook and/or the second latch hook resilient movement; Thereby can realize preventing the sagging distortion of jib, and can also realizing the disengaging between the two through the relative motion of the first arm and second arm as the first arm of first object with as the mutual hook lock of second arm in the relative motion process of second object; Do not influence jib work, and simple in structure, practical.

Other feature and advantage of the utility model will partly specify in the specific embodiment subsequently.

Description of drawings

Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of manual, is used to explain the utility model with the following specific embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:

Fig. 1 is that the using compensation method prevents the sagging deformed configurations sketch map of jib (horizontal folding state) in the prior art.

Fig. 2 is the structural representation (vertically folding device) of the foldable arm rack of the engineering machinery that provides of the utility model;

Fig. 3 a and Fig. 3 b show the facing of first latch hook in the lock hook assembly that the utility model provides, side-looking structural representation respectively;

Fig. 4 a and Fig. 4 b show respectively second latch hook in the lock hook assembly that the utility model provides side-looking, face structural representation;

Fig. 5 a to Fig. 5 d shows that the lock hook assembly that the utility model provides passes through to slide and hook lock process sketch map together relatively;

Fig. 6 a to Fig. 6 g is the process sketch map of lock hook assembly through sliding and break away from relatively of showing that the utility model provides.

Description of reference numerals

1 first latch hook, 2 second latch hooks

3 first objects, 4 second objects

5 support members, 7 driving oil cylinder

The front end of 11 slip latch hook ends, 12 first latch hooks

The front end 22 latch hook ends of 21 second latch hooks

23 cardinal extremities, 24 sliding bevels

31 first 32 second

41 first spring parts, 42 second spring parts

43 elastic baffles, 61 the first arms

62 second arms

The specific embodiment

Be elaborated below in conjunction with the specific embodiment of accompanying drawing to the utility model.Should be understood that the specific embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.

In the utility model; Do not doing under the situation of opposite explanation; The noun of locality that uses normally defines based on page shown in Figure 1 like " upper and lower ", and " front end of the front end of first latch hook and second latch hook " is two opposite ends that refer to first latch hook and second latch hook respectively.In addition, in the hook lock and detach procedure of the lock hook assembly of describing, the direction of arrow among Fig. 5 a to Fig. 6 g is the direction of first latch hook 1 mentioned of the utility model near second latch hook 2, and the opposite reverse of arrow then is the direction of first latch hook 1 away from second latch hook 2.Other nouns of locality then describe in concrete condition.It should be noted that these nouns of locality only are used to explain the utility model, are not limited to the utility model.

According to the utility model, the sagging problem on deformation of the jib of mentioning in order to overcome in the prior art, as shown in Figure 2; The utility model provides a kind of foldable arm rack of engineering machinery; This foldable arm rack comprises the first arm 61 and second arm 62 hinged with this first arm 61, and wherein, foldable arm rack comprises the lock hook assembly that the utility model provides; Wherein the first arm 61 is that following lock hook assembly first object 3, the second arms 62 are second object 4 of lock hook assembly.Particularly, second arm 62 is for working as forearm, and the first arm 61 is for being hinged on the following joint arm that deserves forearm, and following joint arm passes through driving oil cylinder 7 around working as the forearm rotation.Therefore, when jib is folding, through lock hook assembly can with under save the arm hook lock on forearm, to prevent down that sagging distortion takes place to save arm.Thereby need not use penalty method mentioned in the prior art, therefore the joint arm promptly can prevent sagging distortion down, can effectively not guarantee the safety of jib to pushing when forearm again.Compare the mode of using compensation method in addition; The stroke of driving oil cylinder 7 is littler; Help alleviating the weight of foldable arm rack; In addition since driving oil cylinder 7 do not need under save arm to be continuously applied pulling force not sagging to guarantee it, so the specification of driving oil cylinder 7 can be littler, further alleviated the weight of foldable arm rack.In addition importantly, because the use lock hook assembly descends the hook lock of joint arm, even do not using under the situation of foldable arm rack for a long time, even the safety that also can not have influence on foldable arm rack takes place to leak hydraulic system.Can solve the sagging problem of jib fully.

Obviously, lock hook assembly act in the foldable arm rack that the utility model provides very important.The lock hook assembly that the utility model provided can be realized as the first arm of first object with as the mutual hook lock of second arm in the relative motion process of second object; To prevent the sagging distortion of jib; And the relative motion through the first arm and second arm can also realize the disengaging between the two; Do not influence jib work, and simple in structure, practical, make whole process only need use original driving oil cylinder 7 to realize; And do not need to increase separately control circuit or hydraulic circuit, simple and practical.Below in conjunction with accompanying drawing the structure of lock hook assembly, working method etc. are elaborated.

Shown in Fig. 2 to Fig. 6 g; An aspect according to the utility model; A kind of lock hook assembly is provided, and this lock hook assembly is used for first object 3 (the first arm 61) and second object 4 (second arm 62) that hook lock can relative motion, and lock hook assembly comprises first latch hook 1 and second latch hook 2 that is oppositely arranged; First latch hook 1 is arranged on first object 3 and flexibly activity; And second latch hook 2 is arranged on second object 4 and flexibly activity, wherein, and through the relative motion of first object 3 and second object 4; First latch hook 1 can make first latch hook 1 and/or second latch hook 2 flexibly movable along the relative slip of second latch hook 2, so that first latch hook 1 hook lock or break away from second latch hook 2 selectively.

In technique scheme, because first latch hook 1 and second latch hook 2 be separately positioned on first object 3 and second object 4, and all flexibly activities.Under the relative motion of first object 3 and second object 4; First latch hook 1 and second latch hook 2 can slide each other; In the two mutual sliding process; Can make first latch hook 1 that is oppositely arranged and/or second latch hook 2 flexibly movable so that first latch hook 1 rotatably with second latch hook, 2 hook locks or disengaging.Thereby make win object 3 and second object 4 in the relative motion process, just can accomplish hook lock and disengaging.Concrete motion process describes the preferred implementation of the utility model and clearer with reference to accompanying drawing through following.Therefore when first object 3 and second object 4 be associated arm in the foldable arm rack when saving, can satisfy the utility model purpose of the foldable arm rack that above-mentioned the utility model provides fully.

Need to prove that wherein in the relative sliding process of first latch hook 1 and second latch hook 2, the elasticity active situation of first latch hook and second latch hook depends on the structure of first latch hook 1 and second latch hook 2 itself and factor such as angle between the two.For example following the utility model provide a kind of preferred embodiment in, carry out in the relative sliding process along second latch hook 2 at first latch hook 1, when resilient movement take place in second latch hook 2, the two hook lock, when resilient movement takes place in first latch hook 1, the two disengaging.This optimal way just is used to explain the utility model, is not limited to the utility model, in other NM embodiments, also can have other situation, and for example the situation of resilient movement takes place simultaneously for two latch hooks.For this type of set-up mode,, all should drop in the protection domain of the utility model as long as can satisfy the purpose of the utility model.

Wherein, Realize that for ease first latch hook 1 and second latch hook 2 are through slide and the purpose of hook lock or disengaging relatively; The latch hook face at these two latch hooks, 1,2 places is coplane not; Said here " latch hook face " central plane for realizing that the latch hook structure of hook lock and disengaging belongs between the latch hook, when this latch hook face not during coplane, can hook lock between the latch hook structure together.In the preferred implementation of the utility model, the angle of the latch hook face of the latch hook face of first latch hook 1 and second latch hook 2 is 20 °-90 °.Wherein more near 90 °, the relative slip between two latch hooks realizes more easily that with interlocking hook mutually therefore in the optimal way that the utility model provides, more preferably, first latch hook 1 is 90 ° with the angle of the latch hook face at second latch hook, 2 places, promptly each other not vertically.

In addition; Flexibly movable set-up mode has multiple can to realize two

latch hooks

1,2; For example can realize whole flexibly the moving of two latch hooks through following elastic components such as spring; Can also promptly adopt elastomeric material fabrication portion or whole latch hook through the mode of elastic portion is set on two

latch hooks

1,2, can realize that equally two latch hooks are through slide and flexibly movable purpose relatively.Other that can expect to those skilled in the art realize that two latch hooks through sliding and flexibly movable embodiment relatively, also should drop in the protection domain of the utility model.

Particularly, in a preferred implementation of the utility model, shown in Fig. 5 a to Fig. 6 g; First latch hook 1 is vertical each other with the resilient movement direction of second latch hook 2; Therefore preferably, be fixed with first 31, the second object 4 on first object 3 and relatively be fixed with second 32; But first latch hook 1 passes first 31 and also is arranged on this first 31 to resilient movement; But second latch hook 2 passes second 32 and also is arranged on this second 32 to resilient movement, therefore in order to realize in the above-mentioned preferred implementation that the latch hook face of two

latch hooks

1,2 is vertical each other; The axial angle that preferably is provided with first 31 and second 32 is 90 °, and promptly two

axles

31,32 is axially vertical each other.

For the resilient movement that realizes that the first following latch hook 1 and second latch hook 2 are taken place in mutual sliding process.Preferably, first 31 and second 32 is special-shaped axis, and is separately fixed on first object 1 and second object 2 through support member 5, and correspondingly is formed with the profiled holes with this special-shaped axis form fit on first latch hook 1 and second latch hook 2.Need to prove; Said here " special-shaped axis " is the on-circular cross-section axle in the profile connected mode known in those skilled in the art; Be formed on the on-circular cross-section hole that " profiled holes " then is and this on-circular cross-section shape shaft cooperates on first,

second latch hook

1,2 equally,, can realize that first,

second latch hook

1,2 is in the enterprising line slip of corresponding axle through the form fit of this on-circular cross-section; And do not rotate, thereby each self-forming one cover slippage is secondary.In other words; First,

second latch hook

1,2 all can move axially; But all circumferentially be arranged on regularly on the

corresponding axle

31,32, shown in Fig. 3 a and 4b, first 31 and second 32 are square shaft; The utility model does not limit for the special-shaped axis of other on-circular cross-sections, for example can also be triangular shaft, plum blossom oblique crank Z etc.Thereby realize following first latch hook 1 and second latch hook 2 the resilient movement in relative sliding process along corresponding axis 31,32.In addition, be formed with the irregularly-shaped hole with the special-shaped axis form fit on fixing first 31 and second 32 the support member 5 too, so that first 31 and second 32 firm being fixed on first object 3 and second object 4, and do not rotate.

In addition, in order to realize the resilient movement of first,

second latch hook

1,2, shown in Fig. 3 a to 4b along

corresponding axis

31,32; Preferably, first latch hook 1 through first spring part 41 can along shown in first resilient movement, and second latch hook 2 can be along second 32 resilient movement through second spring part 42; Wherein, first spring part 41 and second spring part 42 all are set on corresponding first 31 and second 32, wherein preferably; First,

second spring part

41,42 is respectively two; I.e. all sheathed spring part in

corresponding latch hook

1,2 both sides, this spring part one end contacts with

latch hook

1,2, and the other end contacts with support member 5; To realize that latch hook, all can resilient movement on the both direction of corresponding axle.And when not working, can be stabilized on the corresponding axle 31,32.In addition, except spring part, can also use various elastic components well known in the art to replace, the utility model does not limit this type of variation.

In the another kind of embodiment of the utility model, first latch hook 1 and second latch hook 2 comprise respectively can hard to bear urgent elastic deformation elastic portion, and first latch hook is fixedly installed on first object 3, second latch hook 2 is fixedly installed on second object 4.Therefore; Pass through elastic portion; Can first latch hook 1 and second latch hook 2 be fixedly installed on respectively on first,

second object

3,4; And the relative slip through first latch hook 1 and second latch hook 2 can elastic portion receive compel distortion, thereby make first latch hook 1 and second latch hook that satisfactory elasticity activity take place, so through realizing the purpose of the utility model.In this embodiment; " elastic portion " related in the utility model can be for realizing through satisfactory elastomeric material; The various macromolecular materials that for example have good tensile property, perhaps comparatively flat thin metal construction etc. specifically need need be used according to the size of required hook lock power between first object and second object; As long as can realize the purpose of the utility model, the utility model does not limit selecting for use of this type of material.In addition, the part-structure that " elastic portion " can first,

second latch hook

1,2 for example is used for fixing the base portion part that is arranged on

object correlation

3,4, also can be entire infrastructure, and promptly whole suspension hook is satisfactory elastomeric material and processes.

The flexibly embodiment of activity of two kinds of realization latch hooks has been described above; Wherein, no matter how two latch hooks carry out the elasticity activity, the hook lock that two latch hooks are realized through sliding relatively and the operating principle of disengaging are similar; Therefore explanation for ease; Only combine accompanying drawing mainly first kind of preferred mode to be described below, this optimal way only is used to explain the utility model, is not limited to the utility model.

Particularly, for realize first latch hook 1 can along second latch hook 2 slide relatively and hook lock on second latch hook 2, preferably, first latch hook 1 is formed with the slip latch hook end 11 that can slide along the front end 21 of second latch hook 2.Therefore, in the hook lock process shown in Fig. 5 a to Fig. 5 d, at first in Fig. 5 a; First latch hook 1 is along the direction of arrow moving near second latch hook 2; In the foldable arm rack that provides specific to the utility model, be to drive the first arms 61 near second arm 62, because the first arm 61 and second arm 62 are hinged by driving oil cylinder 7; Therefore the relative motion between them is for rotating, and the change in location of this first latch hook 1 from Fig. 5 a to Fig. 5 b can be found out.In Fig. 5 b; The slip latch hook end 11 of first latch hook 1 further carries out sliding near said second latch hook 2 ground along the front end 21 of second latch hook; This moment is shown in Fig. 5 c, because second latch hook 2 can be along second 32 resilient movement, and second 32 mutual vertical with first 31; Therefore first latch hook 1 that is arranged on first 31 can move along second 32 by driving second latch hook 2, and first latch hook 1 then further carries out sliding near second latch hook, 2 ground.Therefore; Up to shown in Fig. 5 d, because first latch hook 1 constantly slides near second latch hook 2 along the direction of arrow, second latch hook 2 is constantly along second 32 resilient movement simultaneously; The slip latch hook end 11 of first latch hook 1 can fall into the latch hook structure of second latch hook; And in the latch hook structure that falls into second latch hook 2 in a flash, because the driving force of 1 pair second latch hook of first latch hook disappears, second latch hook 2 is under the effect of second spring part 42; Return to initial state, thereby accomplish first latch hook, 1 hook lock in second latch hook 2.

In said process, in order to adapt to relatively rotating of first object 3 and second object 4, preferably, slip latch hook end 11 is an arc, to adapt to the hook lock process of two objects in relative rotation better.Certainly; In other cases; This slip latch hook end 11 can be ramp structure; As long as the slip latch hook end 11 of first latch hook is slided in the latch hook structure of second latch hook 12, the concrete shape of this slip latch hook end can for those skilled in the art can be relative different shape, the utility model does not limit this.

And when first object 3 needs to break away from second object 4, when for example the first arm 61 needs disengaging second arm 62 to launch, need lock hook assembly to break away from.For first latch hook 1 is broken away from from second latch hook 2; Preferably; The latch hook structure of second latch hook 2 comprises latch hook end 22 and cardinal extremity 23; Latch hook end 22 is provided with the elastic baffle 43 of Sealed lock hook structure, and an end of this elastic baffle 43 is pressed against on the cardinal extremity 23, and latch hook end 22 inboards of second latch hook 2 are formed with and lead to cardinal extremity 23 sliding bevels 24.

Therefore, in latch hook detach procedure like Fig. 6 a to 6g, the hook lock state that wherein Fig. 6 a and Fig. 5 d showed for the lock hook assembly under the different views situation; And when first latch hook 1 begins to break away from, shown in Fig. 6 b, at first because first latch hook 1 can carry out resilient movement along first 31; When the front end 12 of first latch hook when arrow carries out near the moving of second latch hook 2; The slip that first latch hook 1 can carry out towards cardinal extremity 23 along the sliding bevel 24 of second latch hook 2 is along with the continuation of first latch hook 1 is slided, shown in Fig. 6 c and Fig. 6 d; The front end 12 of first latch hook is pressed against the elastic baffle 43 on the cardinal extremity 23 with pushing tow, and slides on the cardinal extremity 23.Along with further slip, shown in Fig. 6 e, elastic baffle 43 will break away from the front end 12 of first latch hook through the latch hook structure of first latch hook 1, therefore elastic reset under the effect of elastic force, and be pressed against again on the cardinal extremity 23.And this moment; Elastic baffle 43 can be the latch hook structure of first latch hook, 1 block, second latch hook 2 owing to be pressed against on the cardinal extremity 23, thereby shown in Fig. 6 f; First latch hook 1 can carry out sliding away from second latch hook 2 of the direction opposite with arrow through the upper surface along elastic baffle 43; After final front end 12 at first latch hook breaks away from second latch hook 2, first 31 elastic reset in edge owing to the effect of first spring part 41, thereby the process of first latch hook 1 disengaging second latch hook 2 of realization shown in Fig. 6 g.The disengaged position that this moment, Fig. 6 g and Fig. 5 a showed for the lock hook assembly under the different views situation.

The process that is different from hook lock, in the process of above-mentioned disengaging, first latch hook 1 at first need carry out the slip near second latch hook, and then carries out the slip away from second latch hook, and accomplishes the detach procedure of whole lock hook assembly.In addition, the front end 12 of first latch hook slides into cardinal extremity 23 along sliding bevel 24 for ease, and preferably, sliding bevel 24 is a plane structure.Certainly other structures that can realize purpose drop in the protection domain of the utility model equally.

Those skilled in the art can be understood that; Only combine accompanying drawing to describe in the utility model the embodiment that carries out the elasticity activity through latch hook integral body above; And the latch hook that carries out realizing through elastic portion at above-mentioned another kind originally itself carries out in the elasticity manner; Elastic portion can realize the above-mentioned course of work equally, for fear of repetition, does not do too much at this and to give unnecessary details.

To sum up; The hook lock and the detach procedure of the lock hook assembly that in conjunction with the drawings the utility model is provided specify; In said process, the hook lock of lock hook assembly and detach procedure all only rely on the relative motion of first object 3 and second object 4 to realize, in the foldable arm rack of the engineering machinery that the utility model provides; Then be to use driving oil cylinder 7 control the first arms 61 (joint arm down) to move, thereby realize the hook lock and the disengaging of lock hook assembly with respect to second arm 62 (working as forearm).Particularly; In order to make driving oil cylinder 7 drive joint arm down more effortlessly, the arm hook lock will be saved down the time at needs, preferably when forearm; As shown in Figure 2; Carrying out the hook lock operation when down the joint arm is in vertical state when forearm, this moment is because the sagging distortion of joint arm is minimum down, so also minimum of the driving force of driving oil cylinder 7.When needs down joint arm hook lock when on the forearm; Constantly reclaim operation by driving oil cylinder 7; Make that the joint arm is constantly near working as forearm down; Thereby make first latch hook 1 that is arranged on down on the joint arm get in second latch hook, can realize, thereby make down joint arm hook lock on forearm into hook through said process.And this moment, driving oil cylinder 7 stops action, because the existence of lock hook assembly makes driving oil cylinder need not locking, can keep this hook lock state.In addition under action of gravity, following joint arm is a pulling force to the power when forearm all the time, at this moment the phenomenon that breaks off relations can not occur no matter telescopic jib is in level, vertically state or other are arbitrarily angled.Effectively avoided the sagging distortion of time joint arm.

And when telescopic jib needs work, then only need to proceed recovery operation through driving oil cylinder 7, make that forearm is closely worked as in the continued access of joint knee-joint down; According to above-mentioned lock hook assembly operating principle; First latch hook 1 that saves down on the arm can shift out second latch hook 2 on forearm, and when the latch hook structure of the elastic baffle 43 of second latch hook 3 shutoff second latch hook again, driving oil cylinder 7 is carried out stretching; Thereby make down the joint arm away from working as forearm, and realize the unhook of first latch hook 1 and second latch hook 2 simultaneously.Can make the foldable arm rack operate as normal of the engineering machinery that the utility model provides.Said process is all only controlled through driving oil cylinder 7, and need not to add other control system or device, makes that the practicality of the utility model is stronger.

Those skilled in the art can be understood that in addition; Because heavier usually at the arm of telescopic jib joint, the lock hook assembly that the utility model provides need have certain tensile strength, the elastic portion of in using the utility model first aspect, describing in the time of especially of passing through is carried out in the embodiment of elasticity activity of latch hook; The material of elastic portion need adopt tensile strength high; And have the material of lateral elasticity distortion, this material can bear the sagging power of jib, and deflection need be controlled in the satisfactory scope.For instance, can form,, can realize lateral deformation owing to become the cross section attenuation of base portion through basic flattening existing latch hook, but because sectional area does not change, and it has the tensile strength of original latch hook equally, thereby the purpose of the utility model accomplished.As long as can realize the utility model, those skilled in the art can select this type of material of any known in this area for use, and the utility model does not limit this.

Therefore, the lock hook assembly that the utility model provides is simple in structure, and is practical.Be applicable to the usefulness of the foldable arm rack of the engineering machinery that the utility model provides fully.Can effectively solve as the sagging problem of the first arm under folded state that saves arm down; And the various motions of lock hook assembly can both be controlled through driving oil cylinder 7; Therefore, do not influence opening of jib fully and use, and the foldable arm rack that makes the utility model provide is practical with normal; Can be used for various engineering machinery, for example in coagulation pump truck or the concrete spreader.

Therefore, according to another aspect of the utility model, a kind of concrete pumping equipment, this concrete pumping equipment comprise the engineering machinery foldable arm rack that the utility model provides.This concrete pumping equipment can be the concrete mixer that has foldable arm rack or material distributing machine etc.Other use the engineering machinery of the foldable arm rack that the utility model provide all should drop in the protection domain of the utility model in addition.

More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned embodiment; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technical scheme of the utility model, these simple variant all belong to the protection domain of the utility model.

Need to prove in addition; Each concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner; For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.

In addition, also can carry out combination in any between the various embodiment of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.

Claims

1. lock hook assembly; It is characterized in that; Said lock hook assembly is used for first object (3) and second object (4) that hook lock can relative motion; Said lock hook assembly comprises first latch hook (1) and second latch hook (2) that is oppositely arranged, and said first latch hook (1) is arranged on the last and flexibly activity of first object (1), and said second latch hook (2) is arranged on the last and flexibly activity of second object (1); Wherein, Through the relative motion of said first object (3) and said second object (4), said first latch hook (1) can make said first latch hook (1) and/or said second latch hook (2) flexibly movable along the relative slip of said second latch hook (2), so that said first latch hook (1) hook lock or break away from said second latch hook (2) selectively.

2. lock hook assembly according to claim 1 is characterized in that, the angle of the latch hook face of the latch hook face of said first latch hook (1) and said second latch hook (2) is 20 °-90 °.

3. lock hook assembly according to claim 2; It is characterized in that; Be fixed with on said first object (3) first (31), said second object (4) relatively is fixed with second (32), and the axial angle of these first (31) and second (32) is 90 °; Said first latch hook (1) passes said first (31) but also is arranged on these first (31) to resilient movement, and said second latch hook (2) passes said second (32) but also is arranged on these second (32) to resilient movement.

4. lock hook assembly according to claim 3; It is characterized in that; Said first latch hook (1) circumferentially is arranged on said first (31) regularly; Said second latch hook (2) can be along said second (32) resilient movement through second spring part (42), and said first latch hook (1) is formed with the slip latch hook end (11) that can slide along the front end (21) of said second latch hook (2).

5. lock hook assembly according to claim 4 is characterized in that, said slip latch hook end (11) is an arc structure.

6. according to any described lock hook assembly among the claim 3-5; It is characterized in that; The latch hook structure of said second latch hook (2) comprises latch hook end (22) and cardinal extremity (23); Said latch hook end (22) is provided with the elastic baffle (43) of the said latch hook structure of sealing, and an end of this elastic baffle (43) is pressed against on the said cardinal extremity (23), and said first latch hook (1) can be along said first (31) resilient movement through first spring part (41); Said second latch hook (2) circumferentially is arranged on said second (32) regularly, and said latch hook end (22) inboard of said second latch hook (2) is formed with and leads to said cardinal extremity (23) sliding bevel (24).

7. lock hook assembly according to claim 6 is characterized in that, said sliding bevel (24) is a plane structure.

8. lock hook assembly according to claim 3; It is characterized in that; Said first (31) and said second (32) are special-shaped axis; This special-shaped axis is separately fixed on said first object (1) and second object (2) through support member (5), and correspondingly is formed with the profiled holes with this special-shaped axis form fit on said first latch hook (1) and said second latch hook (2).

9. lock hook assembly according to claim 2; It is characterized in that; Said first latch hook (1) and said second latch hook (2) comprise the elastic portion of the hard to bear urgent elastic deformation of ability respectively; And said first latch hook is fixedly installed on first object (3), and said second latch hook (2) is fixedly installed on second object (4).

10. lock hook assembly according to claim 9 is characterized in that, said first latch hook (1) is formed with the slip latch hook end (11) that can slide along the front end (21) of said second latch hook (2).

11. according to claim 9 or 10 described lock hook assemblies; It is characterized in that; The latch hook structure of said second latch hook (2) comprises latch hook end (22) and cardinal extremity (23); Said latch hook end (22) is provided with the elastic baffle (43) of the said latch hook structure of sealing, and an end of this elastic baffle (43) is pressed against on the said cardinal extremity (23), and said latch hook end (22) inboard of said second latch hook (2) is formed with and leads to said cardinal extremity (23) sliding bevel (24).

12. the foldable arm rack of an engineering machinery; This foldable arm rack comprises the first arm (61) and second arm (62) hinged with this first arm (61); It is characterized in that said foldable arm rack comprises according to any described lock hook assembly among the claim 1-11, wherein; Said first object (3) is said the first arm (61), and said second object (4) is said second arm (62).

13. the foldable arm rack of engineering machinery according to claim 12 is characterized in that, said second arm (62) is for work as forearm, and said the first arm (61) is for being hinged on the following joint arm that deserves forearm, and the said arm of joint down rotates when forearm around said through driving oil cylinder (7).

14. a concrete pumping equipment, this concrete pumping equipment comprises foldable arm rack, it is characterized in that, said foldable arm rack is the foldable arm rack according to claim 12 or 13 described engineering machinery.