CN102518306B

CN102518306B - Locking hook assembly, folding arm support of engineering machine and concrete pumping equipment

Info

Publication number: CN102518306B
Application number: CN2011104455303A
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: 2013-12-04
Anticipated expiration: 2031-12-27
Also published as: CN102518306A

Abstract

The invention discloses a locking hook assembly for hooking and locking a first object and a second object in relative movement. The locking hook assembly comprises a first locking hook and a second locking hook which are respectively arranged on the first object and the second object, and the first locking hook and the second locking hook are oppositely arranged and can elastically move, wherein by relative moment of the first object and the second object, the relative slip of the first locking hook along the second locking hook enables the first locking hook and/or the second locking hook to elastically move, so that the first locking hook can be selectively hooked and locked with or separated from the second locking hook. The invention also discloses a folding arm support of an engineering machine using the locking hook assembly. Sagging of a lower joint arm when the folding arm support is in a folded state can be effectively prevented. In addition, the invention also discloses concrete pumping equipment using the folding arm support of the engineering machine.

Description

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

Technical field

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

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, due to after hours, two adjacent arms joints need to fold, to facilitate transportation.Yet as shown in Figure 1, the first arm 61 is hinged on the end of the second arm 62, and by driving oil cylinder 7 to carry out rotatablely moving with respect to the second arm 62.After foldable arm rack work completes, the first arm 61 need to be folded in the below of the second arm 62.Due to the effect of gravity, the phenomenon moved downward away from the second arm 62 can occur in the first arm 61 in the processes such as transportation, and sagging distortion occurs 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 when serious and drive oil cylinder 7 to lose efficacy, cause unnecessary loss.

In the prior art, in order to overcome this sagging distortion, usually just can take into account sag of chain when the theoretical folding position of design the first arm 61, as shown in the dotted portion in Fig. 1, by driving the driving of oil cylinder 7, by the folding position of the first arm 61 theories, design apart from the second arm 62 more recently, to compensate its sag of chain when sagging distortion occurs the first arm 61, thereby make the first arm 61 to miscellaneous part, not cause interference, can normally use.

Yet, owing to driving oil cylinder 7 that the first arm 61 is driven to obtain to more close the second arm 62, therefore when this two arms joint is not also opened, if occur to need the horizontal level of the second arm from Fig. 1 to rise to the situation of vertical position, in the rise process of the second arm 62, in motion process, the sagging distortion of the first arm 61 can diminish gradually, gravity is more and more less to its sagging deformation effect, means the sagging distortion resilience gradually in motion process of the first arm 61.Therefore, design due to more close second arm 62 of the first arm 61, make the first arm 61 and the second arm 62 to press together, if press section bit comparison weakness is extruded the situation of distortion with regard to the lower cover that there will be the second arm 62 arms, thereby cause the second arm 62 to damage, and impact is used.Therefore thisly overcome the sagging method of the first arm impracticable.In addition, when the using compensation method solves 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 be heavier, is unfavorable for the boom system loss of weight;

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

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

Summary of the invention

An object of the present invention is to provide a kind of lock hook assembly, this lock hook assembly can make the first object and the second object that are provided with this lock hook assembly automatically realize mutual hook lock or disengaging in the process of relative motion, and simple in structure, practical.

Another order of the present invention is to provide a kind of foldable arm rack of engineering machinery, this foldable arm rack is used lock hook assembly provided by the invention, make the alternate arm joint of foldable arm rack when relative motion, can hook lock and disengaging, can either prevent sagging distortion, do not affect again jib and launch, practicality is high.

A further object of the present invention is to provide a kind of concrete pumping equipment, and this concrete pumping equipment comprises the foldable arm rack of engineering machinery provided by the invention.

To achieve these goals, the invention provides a kind of lock hook assembly, this lock hook assembly can relative motion for hook lock the first object and the second object, described lock hook assembly comprises the first latch hook and the second latch hook be oppositely arranged, described the first latch hook is arranged on the first object and flexibly activity, and the second latch hook is arranged on the second object and flexibly activity, wherein, relative motion by described the first object and described the second object, described the first latch hook can make described the first latch hook and/or described the second latch hook flexibly movable along the relative sliding of described the second latch hook, so that described the first latch hook hook lock or break away from described the second latch hook selectively.

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

Preferably, be fixed with the first axle on described the first object, described the second object relatively is fixed with the second axle, the axial angle of this first axle and the second axle is 90 °, but described the first latch hook also is arranged on this first axle to resilient movement through described the first axle, but described the second latch hook also is arranged on this second axle to resilient movement through described the second axle.

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

Preferably, described slip latch hook end is arc structure.

Preferably, the slip latch hook end of described the first latch hook approaches described the second latch hook ground slip along the front end of described the second latch hook, and drive described the second latch hook along described the second axle resilient movement, and enter this second latch hook from the front end of described the second latch hook, and the hook lock of realization and described the second latch hook.

Preferably, the latch hook structure of described the second latch hook comprises latch hook end and cardinal extremity, described latch hook end is provided with the elastic baffle of the described latch hook structure of sealing, one side pressure of this elastic baffle leans against on described cardinal extremity, and described the first latch hook can be along described the first axle resilient movement by the first spring part, described the second latch hook circumferentially is arranged on described the second axle regularly, and the described latch hook end inboard of described the second latch hook is formed with and leads to described cardinal extremity sliding bevel.

Preferably, described sliding bevel is plane structure.

Preferably, the front end of described the first latch hook is by approaching the slip of described the second latch hook along described sliding bevel, the described elastic baffle of pushing tow and sliding on described cardinal extremity, and break away from described elastic baffle, this elastic baffle elastic reset and being pressed against on described cardinal extremity, so that the slip away from described the second latch hook by the upper surface along described elastic baffle of described the first latch hook, and break away from this second latch hook.

Preferably, described the first axle and described the second axle are special-shaped axis, this special-shaped axis is separately fixed on described the first object and the second object by support member, and correspondingly is formed with the profiled holes with this special-shaped axis form fit on described the first latch hook and described the second latch hook.

Preferably, described the first latch hook and described the second latch hook comprise respectively the elastic portion that can be forced to elastic deformation, and described the first latch hook is fixedly installed on the first object, and described the second latch hook is fixedly installed on the second object.

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

Preferably, the latch hook structure of described the second latch hook comprises latch hook end and cardinal extremity, described latch hook end is provided with the elastic baffle of the described latch hook structure of sealing, one side pressure of this elastic baffle leans against on described cardinal extremity, and the described latch hook end inboard of described the second latch hook is formed with and leads to described cardinal extremity sliding bevel.

According to another aspect of the present invention, provide a kind of foldable arm rack of engineering machinery, this foldable arm rack comprises the first arm and second arm hinged with this first arm, described foldable arm rack comprises lock hook assembly provided by the invention, wherein, the first object is the first arm, and the second object is the second arm.

Preferably, described the second arm is to work as forearm, and described the first arm is to be hinged on the lower joint arm that deserves forearm, and described lower joint arm is by driving oil cylinder to rotate around the described forearm of working as.

In accordance with a further aspect of the present invention, provide a kind of concrete pumping equipment, this concrete pumping equipment comprises foldable arm rack, the foldable arm rack that described foldable arm rack is engineering machinery provided by the invention.

Pass through technique scheme, but the first latch hook by lock hook assembly provided by the invention and the second latch hook are owing to being located to resilient movement respectively on the first object and the second object, relative sliding by the first latch hook and the second latch hook can make the first latch hook and/or the second latch hook resilient movement, thereby can realize as the first arm of the first object with as the mutual hook lock of the second arm in the relative motion process of the second object, prevent the sagging distortion of jib, and the relative motion by the first arm and the second arm can also realize the disengaging between the two, do not affect jib work, and simple in structure, practical.

Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.

The accompanying drawing explanation

Accompanying drawing is to be used to provide a further understanding of the present invention, and forms the part of manual, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the structural representation that in prior art, the using compensation method prevents the sagging distortion of jib (horizontal folding state).

Fig. 2 is the structural representation (vertically folding device) of the foldable arm rack of engineering machinery provided by the invention;

Fig. 3 a and Fig. 3 b show respectively the facing of the first latch hook in lock hook assembly provided by the invention, side-looking structural representation;

Fig. 4 a and Fig. 4 b show respectively the second latch hook in lock hook assembly provided by the invention side-looking, face structural representation;

Fig. 5 a to Fig. 5 d shows lock hook assembly provided by the invention by relative sliding and hook lock process schematic diagram together;

Fig. 6 a to Fig. 6 g is the process schematic diagram of showing that lock hook assembly provided by the invention breaks away from by relative sliding.

Description of reference numerals

1 first latch hook 2 second latch hooks

3 first object 4 second objects

5 support members 7 drive oil cylinder

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

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

23 cardinal extremity 24 sliding bevels

31 first axle 32 second axles

41 first spring part 42 second spring parts

43 elastic baffle 61 first arms

62 second arms

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.

In the present invention, in the situation that do not do contrary explanation, the noun of locality used is as " upper and lower " the normally page based on as shown in Fig. 1 definition, and " front end of the front end of the first latch hook and the second latch hook " is two opposite ends that refer to respectively the first latch hook and the second latch hook.In addition, in the hook lock and detach procedure of the lock hook assembly of describing, the direction of arrow in Fig. 5 a to Fig. 6 g is the direction that the first latch hook 1 that the present invention mentions approaches the second latch hook 2, and the contrary of arrow is oppositely the direction of the first latch hook 1 away from the second latch hook 2.Other nouns of locality describe in concrete condition.It should be noted that these nouns of locality, only for the present invention is described, are not limited to the present invention.

According to the present invention, in order to overcome the sagging problem on deformation of the jib of mentioning in prior art, as shown in Figure 2, the invention 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 lock hook assembly provided by the invention, wherein the first arm 61 is the second object 4 that following lock hook assembly the first object 3, the second arms 62 are lock hook assembly.Particularly, the second arm 62 is for working as forearm, and the first arm 61 is to be hinged on the lower joint arm that deserves forearm, and lower joint arm is by driving oil cylinder 7 around rotating when forearm.Therefore, when arm support folding, can, by lower joint arm hook lock on forearm, to prevent lower joint arm, sagging distortion occur by lock hook assembly.Thereby do not need to use penalty method mentioned in prior art, therefore lower joint arm can prevent sagging distortion, can, to being pushed when forearm, effectively not guarantee the safety of jib again.Compare in addition the mode of using compensation method, drive the stroke of oil cylinder 7 less, be conducive to alleviate the weight of foldable arm rack, not sagging to guarantee it owing to driving oil cylinder 7 not need that lower joint arm is continuously applied to pulling force in addition, therefore drive the specification of oil cylinder 7 can be less, further alleviated the weight of foldable arm rack.In addition importantly, owing to using lock hook assembly to carry out the hook lock of lower joint arm, even in the situation that for a long time do not use foldable arm rack, even leakage occurs hydraulic system, also can not have influence on the safety of foldable arm rack.Can solve the sagging problem of jib fully.

Obviously, lock hook assembly act in foldable arm rack provided by the invention very important.Lock hook assembly provided by the present invention can be realized as the first arm of the first object with as the mutual hook lock of the second arm in the relative motion process of the second object, to prevent the sagging distortion of jib, and the relative motion by the first arm and the second arm can also realize the disengaging between the two, do not affect 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.

As shown in Fig. 2 to Fig. 6 g, according to an aspect of the present invention, a kind of lock hook assembly is provided, this lock hook assembly can relative motion for hook lock first object 3(the first arm 61) and second object 4(the second arm 62), lock hook assembly comprises the first latch hook 1 and the second latch hook 2 be oppositely arranged, the first latch hook 1 is arranged on the first object 3 and flexibly activity, and the second latch hook 2 is arranged on the second object 4 and flexibly activity, wherein, relative motion by the first object 3 and the second object 4, the first latch hook 1 can make the first latch hook 1 and/or the second latch hook 2 flexibly movable along the relative sliding of the second latch hook 2, so that the first latch hook 1 hook lock or break away from the second latch hook 2 selectively.

In technique scheme, because the first latch hook 1 and the second latch hook 2 are separately positioned on the first object 3 and the second object 4, and all can be flexibly movable.Under the relative motion of the first object 3 and the second object 4, the first latch hook 1 and the second latch hook 2 can slide mutually, in the two mutual sliding process, can make the first latch hook 1 of being oppositely arranged and/or the second latch hook 2 flexibly movable so that the first latch hook 1 rotatably with the second latch hook 2 hook locks or disengaging.Thereby make the first object 3 and the second object 4 just can complete hook lock and disengaging in the relative motion process.Concrete motion process is clearer by following the preferred embodiment of the present invention being described with reference to accompanying drawing.Therefore when the first object 3 and the second object 4 be associated arm in foldable arm rack while saving, can meet the goal of the invention of above-mentioned foldable arm rack provided by the invention fully.

Wherein it should be noted that, in the relative sliding process of the first latch hook 1 and the second latch hook 2, the elasticity active situation of the first latch hook and the second latch hook, depend on the structure of the first latch hook 1 and the second latch hook 2 itself and the factor such as angle between the two.For example following provided by the invention a kind of preferred embodiment in, in the first latch hook 1 carries out the relative sliding process along the second latch hook 2, when resilient movement occurs in the second latch hook 2, the two hook lock, when resilient movement occurs in the first latch hook 1, the two disengaging.This optimal way, just for the present invention is described, is not limited to the present invention, in other NM embodiments, also can have other situations, and for example the situation of resilient movement occurs simultaneously for two latch hooks.For this type of set-up mode, as long as can meet purpose of the present invention, all should drop in protection scope of the present invention.

Wherein, the purpose of hook lock or disengaging in order conveniently to realize the first latch hook 1 and the second latch hook 2 by relative sliding, the latch hook face at these two latch hooks, 1,2 places is not coplanar, said " latch hook face " is for realizing the central plane at the latch hook structure place of hook lock and disengaging between latch hook herein, when this latch hook face is not coplanar, can hook lock between latch hook structure together.In the preferred embodiment of the present invention, the angle of the latch hook face of the latch hook face of the first latch hook 1 and the second latch hook 2 is 20 °-90 °.Wherein more approach 90 °, the relative sliding between two latch hooks and phase interlocking hook are more easily realized, so, in optimal way provided by the invention, more preferably, the angle of the latch hook face at the first latch hook 1 and the second latch hook 2 places is 90 °, mutually vertical.

In addition, can realize two

latch hooks

1,2 flexibly movable set-up mode have multiple, such as realizing flexibly moving of two latch hook integral body by the following elastic components such as spring, can also be by the mode of elastic portion be set on two

latch hooks

1,2, adopt elastomeric material fabrication portion or whole latch hook, can realize equally two latch hooks by relative sliding and movable purpose flexibly.Other that can expect are for those skilled in the art realized two latch hooks by relative sliding and movable embodiment flexibly, also should drop in protection scope of the present invention.

Particularly, in a preferred embodiment of the present invention, as shown in Fig. 5 a to Fig. 6 g, the first latch hook 1 is mutually vertical with the resilient movement direction of the second latch hook 2, therefore preferably, be fixed with the first axle 31 on the first object 3, the second object 4 relatively is fixed with the second axle 32, but the first latch hook 1 also is arranged on this first axle 31 to resilient movement through the first axle 31, but the second latch hook 2 also is arranged on this second axle 32 to resilient movement through the second axle 32, therefore in order to realize in above-mentioned preferred embodiment, two

latch hooks

1, 2 latch hook face is mutually vertical, the axial angle that the first axle 31 and the second axle 32 preferably are set is 90 °, i.e. two

axles

31, 32 axially mutually vertical.

For the resilient movement that realizes that the first following latch hook 1 and the second latch hook 2 occur in mutual sliding process.Preferably, the first axle 31 and the second axle 32 are special-shaped axis, and are separately fixed on the first object 3 and the second object 4 by support member 5, and correspondingly are formed with the profiled holes with this special-shaped axis form fit on the first latch hook 1 and the second latch hook 2.It should be noted that, said " special-shaped axis " is the on-circular cross-section axle in profile connected mode known in those skilled in the art herein, be formed on equally the on-circular cross-section hole that " profiled holes " is and this on-circular cross-section shape shaft coordinates on first,

second latch hook

1,2, form fit by this on-circular cross-section, can realize that first,

second latch hook

1,2 is in the corresponding enterprising line slip of axle, and not rotating, thereby a set of slippage pair of each self-forming.In other words, first,

second latch hook

1,2 all can move axially, but all circumferentially be arranged on regularly on

corresponding axle

31,32, as shown in Fig. 3 a and 4b, the first axle 31 and the second axle 32 are square shaft, the present invention does not limit for the special-shaped axis of other on-circular cross-sections, such as being triangular shaft, plum blossom oblique crank Z etc.Thereby realize following the first latch hook 1 and the second latch hook 2 resilient movement along

corresponding axis

31,32 in the relative sliding process.In addition, fix on the support member 5 of the first axle 31 and the second axle 32 irregularly-shaped hole be formed with too with the special-shaped axis form fit, so that the first axle 31 and the second axle 32 firmly be fixed on the first object 3 and the second object 4, and do not rotate.

In addition, in order to realize first, the

second latch hook

1, 2 along

corresponding axis

31, 32 resilient movement, as shown in Fig. 3 a to 4b, preferably, the first latch hook 1 by the first spring part 41 can along shown in the first axle resilient movement, and the second latch hook 2 can be along the second axle 32 resilient movement by the second spring part 42, wherein, the first spring part 41 and the second spring part 42 all are set on corresponding the first axle 31 and the second axle 32, wherein preferably, first, the

second spring part

41, 42 are respectively two, at

corresponding latch hook

1, 2 both sides are sheathed spring part all, this spring part one end and

latch hook

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

In another embodiment of the invention, the first latch hook 1 and the second latch hook 2 comprise respectively the elastic portion that can be forced to elastic deformation, and the first latch hook is fixedly installed on the first object 3, and the second latch hook 2 is fixedly installed on the second object 4.Therefore, pass through elastic portion, the first latch hook 1 and the second latch hook 2 can be fixedly installed on respectively on first,

second object

3,4, and the relative sliding by the first latch hook 1 and the second latch hook 2 can elastic portion be forced to distortion, thereby make the first latch hook 1 and the second latch hook that satisfactory elasticity activity occur, therefore by realizing purpose of the present invention.In this embodiment, " elastic portion " related in the present invention can be for realizing by satisfactory elastomeric material, the various macromolecular materials that for example there is good tensile property, perhaps comparatively flat thin metal construction etc., specifically need to need according to the size of required hook lock power between the first object and the second object to use, as long as can realize purpose of the present invention, the present invention does not limit selecting of materials.In addition, the part-structure that " elastic portion " can first,

second latch hook

1,2,, for being fixedly installed on the base portion part of

object correlation

3,4, can be for example also entire infrastructure, and whole suspension hook is satisfactory elastomeric material and makes.

The above has described two kinds of embodiments of realizing that latch hook can be flexibly movable, wherein, no matter how two latch hooks carry out the elasticity activity, the hook lock that two latch hooks are realized by relative sliding and the operating principle of disengaging are similar, therefore for convenience of description, below only mainly the preferred mode of the first is described by reference to the accompanying drawings, this optimal way, only for the present invention is described, is not limited to the present invention.

Particularly, for realize the first latch hook 1 can be along the second latch hook 2 relative slidings and hook lock on the second latch hook 2, preferably, the first latch hook 1 is formed with the slip latch hook end 11 that can slide along the front end 21 of the second latch hook 2.Therefore, in the hook lock process as shown in Fig. 5 a to Fig. 5 d, at first in Fig. 5 a, the first latch hook 1 approaches moving of the second latch hook 2 along the direction of arrow, in foldable arm rack provided by the invention, be by driving oil cylinder 7 to drive the first arms 61 to approach the second arm 62, due to the first arm 61 and the second arm 62 hinged, 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, slip latch hook end 11 front ends along the second latch hook 21 of the first latch hook 1 further approach described the second latch hook 2 ground and slide, now as shown in Figure 5 c, because the second latch hook 2 can be along the second axle 32 resilient movement, and the second axle 32 is mutually vertical with the first axle 31, therefore the first latch hook 1 be arranged on the first axle 31 can drive the second latch hook 2 to move along the second axle 32, and the first latch hook 1 is further approached the second latch hook 2 ground and slides.Therefore, until as shown in Fig. 5 d, because the first latch hook 1 constantly approaches the second latch hook 2 slips along the direction of arrow, the second latch hook 2 is constantly along the second axle 32 resilient movement simultaneously, the slip latch hook end 11 of the first latch hook 1 can fall into the latch hook structure of the second latch hook, and at the latch hook structure that falls into the second latch hook 2 in a flash, driving force disappearance due to 1 pair of the second latch hook of the first latch hook, the second latch hook 2 is under the effect of the second spring part 42, return to initial state, thereby complete the first latch hook 1 hook lock in the second latch hook 2.

In said process, in order to adapt to relatively rotating of the first object 3 and the second object 4, preferably, slip latch hook end 11 is arc, to adapt to better the hook lock process of two objects in relative rotation.Certainly, in other cases, this slip latch hook end 11 can be ramp structure, as long as can make the slip latch hook end 11 of the first latch hook slide in the latch hook structure of the second latch hook 12, the concrete shape of this slip latch hook end can for those skilled in the art can be relative various shapes, the present invention does not limit this.

And, when the first object 3 needs to break away from the second object 4, for example, when the first arm 61 needs disengaging the second arm 62 to be launched, need lock hook assembly to break away from.For the first latch hook 1 is broken away from from the second latch hook 2, preferably, the latch hook structure of the 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, one side pressure of this elastic baffle 43 leans against on cardinal extremity 23, and latch hook end 22 inboards of the second latch hook 2 are formed with and lead to cardinal extremity 23 sliding bevels 24.

Therefore, in the latch hook detach procedure as Fig. 6 a to 6g, the hook lock state for the lock hook assembly in the different views situation that wherein Fig. 6 a and Fig. 5 d show, and when the first latch hook 1 starts to break away from, as shown in Figure 6 b, at first because the first latch hook 1 can carry out resilient movement along the first axle 31, when the front end 12 of the first latch hook is approached moving of the second latch hook 2 along arrow, the slip that the first latch hook 1 can carry out towards cardinal extremity 23 along the sliding bevel 24 of the second latch hook 2, along with the continuation of the first latch hook 1 is slided, as shown in Fig. 6 c and Fig. 6 d, the front end 12 of the first latch hook is pressed against the elastic baffle 43 on cardinal extremity 23 by pushing tow, and slide on cardinal extremity 23.Along with further slip, as shown in Fig. 6 e, elastic baffle 43 will break away from by the latch hook structure of the first latch hook 1 front end 12 of the first latch hook, therefore elastic reset under the effect of elastic force, and again be pressed against on cardinal extremity 23.And now, elastic baffle 43 is owing to being pressed against on cardinal extremity 23, it can be the latch hook structure of first latch hook 1 block the second latch hook 2, thereby as shown in Figure 6 f, the first latch hook 1 can carry out sliding away from the second latch hook 2 of the direction contrary with arrow by the upper surface along elastic baffle 43, finally after the front end 12 of the first latch hook breaks away from the second latch hooks 2, due to the effect of the first spring part 41 along the first axle 31 elastic resets, thereby realize that the first latch hook 1 as shown in Fig. 6 g breaks away from the process of the second latch hook 2.The disengaged position for the lock hook assembly in the different views situation that now Fig. 6 g and Fig. 5 a show.

The process that is different from hook lock, in the process of above-mentioned disengaging, at first the first latch hook 1 needs to be approached the slip of the second latch hook, and then carries out the slip away from the second latch hook, and completes the detach procedure of whole lock hook assembly.In addition, for the front end 12 that facilitates the first latch hook slides into cardinal extremity 23 along sliding bevel 24, preferably, sliding bevel 24 is plane structure.Certainly other structures that can realize purpose drop in protection scope of the present invention equally.

Those skilled in the art can be understood that, the above has only described by reference to the accompanying drawings in the present invention and has carried out the embodiment of elasticity activity by latch hook integral body, and in carrying out the latch hook realized at above-mentioned another kind by elastic portion this itself carrying out the yielding movable flowing mode, elastic portion can realize the above-mentioned course of work equally, for fear of repetition, at this, do not do too much and repeat.

To sum up, in conjunction with the drawings hook lock and the detach procedure of lock hook assembly provided by the invention are had been described in detail, in said process, the hook lock of lock hook assembly and detach procedure all only rely on the relative motion of the first object 3 and the second object 4 to realize, in the foldable arm rack of engineering machinery provided by the invention, use to drive oil cylinder 7 to control under the first arm 61(to save arm) work as forearm with respect to the second arm 62() moved, thereby realize hook lock and the disengaging of lock hook assembly.Particularly, in order to make to drive oil cylinder 7 to drive more effortlessly lower joint arm, needs by lower joint arm hook lock when forearm the time, preferably, as shown in Figure 2, when forearm and lower joint arm, carrying out the hook lock operation during in vertical state, now because the sagging distortion of lower joint arm is minimum, therefore drive the driving force of oil cylinder 7 also minimum.Under needs, joint arm hook lock is on forearm the time, by driving oil cylinder 7 constantly to be reclaimed operation, make lower joint arm constantly approach and work as forearm, thereby make the first latch hook 1 be arranged on lower joint arm enter in the second latch hook by said process, can realize into hook, thereby make lower joint arm hook lock on forearm.And now, drive oil cylinder 7 to stop action, and due to the existence of lock hook assembly, make to drive oil cylinder without locking, can keep this hook lock state.In addition under Action of Gravity Field, lower joint arm is pulling force to the power when forearm all the time, at this moment no matter foldable arm rack in level, vertically state or other arbitrarily angled unhook phenomenons that not there will be.Effectively avoided the sagging distortion of time joint arm.

And when foldable arm rack needs work, only need proceed recovery operation by driving oil cylinder 7, make the continued access of lower joint knee-joint closely work as forearm, according to above-mentioned lock hook assembly operating principle, the first latch hook 1 on lower joint arm can shift out the second latch hook 2 on forearm, when the latch hook structure of the elastic baffle 43 of the second latch hook 3 shutoff the second latch hook again, drives oil cylinder 7 to be carried out stretching, thereby make lower joint arm away from working as forearm, and realize the unhook of the first latch hook 1 and the second latch hook 2 simultaneously.Can make the foldable arm rack normal operation of engineering machinery provided by the invention.Said process is all only controlled by driving oil cylinder 7, and, without adding other control system or device, makes practicality of the present invention stronger.

Those skilled in the art can be understood that in addition, because the joint of the arm at foldable arm rack is usually heavier, lock hook assembly provided by the invention need have certain tensile strength, in the embodiment of the elasticity activity of carrying out latch hook by elastic portion of describing in using first aspect present invention in the time of especially, 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 satisfactory scope.For instance, can form by the basic flattening existing latch hook, the cross section attenuation due to by base portion, can realize lateral deformation, but, because sectional area does not change, it has the tensile strength of original latch hook equally, thereby completes purpose of the present invention.As long as can realize the present invention, those skilled in the art can select the materials of any known in this area, and the present invention does not limit this.

Therefore, lock hook assembly provided by the invention is simple in structure, practical.Be applicable to the use of the foldable arm rack of engineering machinery provided by the invention fully.Can effectively solve the sagging problem of the first arm under folded state as lower joint arm, and the various motions of lock hook assembly can both be controlled by driving oil cylinder 7, therefore, do not affect opening and normal use of jib fully, and make foldable arm rack provided by the invention practical, can for example, for various engineering machinery, in coagulation pump truck or concrete spreader.

Therefore, according to a further aspect of the invention, a kind of concrete pumping equipment, this concrete pumping equipment comprises engineering machinery foldable arm rack provided by the invention.This concrete pumping equipment can be the concrete mixer with foldable arm rack or material distributing machine etc.Other use the engineering machinery of foldable arm rack provided by the invention all should drop in protection scope of the present invention in addition.

Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.

It should be noted that in addition, each concrete technical characterictic described in the above-mentioned specific embodiment, in reconcilable situation, can be combined by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible combinations.

In addition, between various embodiment of the present invention, also can carry out any combination, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims

1. a lock hook assembly, it is characterized in that, described lock hook assembly can relative motion for hook lock the first object (3) and the second object (4), described lock hook assembly comprises the first latch hook (1) and the second latch hook (2) be oppositely arranged, described the first latch hook (1) is arranged on the first object (3) above and can be flexibly movable, described the second latch hook (2) is arranged on the second object (4) above and can be flexibly movable, wherein, relative motion by described the first object (3) and described the second object (4), described the first latch hook (1) can make described the first latch hook (1) and/or described the second latch hook (2) flexibly movable along the relative sliding of described the second latch hook (2), so that described the first latch hook (1) hook lock or break away from described the 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 described the first latch hook (1) and described the second latch hook (2) is 20 °-90 °.

3. lock hook assembly according to claim 2, it is characterized in that, be fixed with the first axle (31) on described the first object (3), described the second object (4) relatively is fixed with the second axle (32), the axial angle of this first axle (31) and the second axle (32) is 90 °, described the first latch hook (1) passes described the first axle (31) but also is arranged on to resilient movement this first axle (31) above, and described the second latch hook (2) passes described the second axle (32) but also is arranged on this second axle (32) to resilient movement.

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

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

6. lock hook assembly according to claim 5, it is characterized in that, the slip latch hook end (11) of described the first latch hook (1) approaches described the second latch hook along the front end (21) of described the second latch hook and slides (2), and drive described the second latch hook (2) along described the second axle (32) resilient movement, and enter this second latch hook (2) from the front end (21) of described the second latch hook, and the hook lock of realization and described the second latch hook (2).

7. according to the described lock hook assembly of any one in claim 3-6, it is characterized in that, the latch hook structure of described the second latch hook (2) comprises latch hook end (22) and cardinal extremity (23), described latch hook end (22) is provided with the elastic baffle (43) of the described latch hook structure of sealing, one side pressure of this elastic baffle (43) leans against on described cardinal extremity (23), and described the first latch hook (1) can be along described the first axle (31) resilient movement by the first spring part (41), described the second latch hook (2) circumferentially is arranged on described the second axle (32) regularly, and described latch hook end (22) inboard of described the second latch hook (2) is formed with leads to described cardinal extremity (23) sliding bevel (24).

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

9. lock hook assembly according to claim 8, it is characterized in that, the front end (12) of described the first latch hook (1) is by approaching the slip of described the second latch hook (2) along described sliding bevel (24), the described elastic baffle of pushing tow (43) and sliding on described cardinal extremity (23), and break away from described elastic baffle (43), this elastic baffle (43) elastic reset and being pressed against on described cardinal extremity (23), so that described the first latch hook (1) slip away from described the second latch hook (2) by the upper surface along described elastic baffle (43), and break away from this second latch hook (2).

10. lock hook assembly according to claim 3, it is characterized in that, described the first axle (31) and described the second axle (32) are special-shaped axis, it is upper that this special-shaped axis is separately fixed at described the first object (3) and the second object (4) by support member (5), and correspondingly be formed with the profiled holes with this special-shaped axis form fit on described the first latch hook (1) and described the second latch hook (2).

11. lock hook assembly according to claim 2, it is characterized in that, described the first latch hook (1) and described the second latch hook (2) comprise respectively the elastic portion that can be forced to elastic deformation, and it is upper that described the first latch hook is fixedly installed on the first object (3), and described the second latch hook (2) is fixedly installed on the second object (4).

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

13. according to the described lock hook assembly of claim 11 or 12, it is characterized in that, the latch hook structure of described the second latch hook (2) comprises latch hook end (22) and cardinal extremity (23), described latch hook end (22) is provided with the elastic baffle (43) of the described latch hook structure of sealing, it is upper that one side pressure of this elastic baffle (43) leans against described cardinal extremity (23), and described latch hook end (22) inboard of described the second latch hook (2) is formed with and leads to described cardinal extremity (23) sliding bevel (24).

14. 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, described foldable arm rack comprises according to the described lock hook assembly of any one in claim 1-13, wherein, the first object (3) is the first arm (61), and the second object (4) is the second arm (62).

15. the foldable arm rack of engineering machinery according to claim 14, it is characterized in that, described the second arm (62) is to work as forearm, and described the first arm (61) is to be hinged on the lower joint arm that deserves forearm, and described lower joint arm is by driving oil cylinder (7) to rotate around the described forearm of working as.

16. a concrete pumping equipment, this concrete pumping equipment comprises foldable arm rack, it is characterized in that, described foldable arm rack is the foldable arm rack according to the described engineering machinery of claims 14 or 15.