CN86209608U - Lock mechanism for whisler-shape connecting device - Google Patents

Abstract

The utility model discloses a lock mechanism for Whisler-shaped connecting device which is provided with an upper arm and a lower arm. The upper arm and the lower arm are respectively connected with the top and the bottom of the bucket front edge of an excavating machine. The arm is provided with an opening which is used for mounting the lock mechanism which is composed of an iron and a C-shaped clamp. The lock mechanism comprises the C-shaped clamp and the iron matching with the C-shaped clamp; the C-shaped clamp and the iron are separated with each other. In the load bearing situation, a support plate under the effect of a spring is inserted between the C-shaped clamp and the iron to make the connecting device move corresponding with the bucket front edge.

Description

Lock mechanism for whisler-shape connecting device

The present invention relates to the locking mechanism on a Wheeler (Whisler) the type linkage, more particularly, be one the arm that is separated from each other on the linkage body is fixed on locking mechanism on the excavator-type shovel clamshell excavator leading edge.

The existing relevant patent that relates to the locking of Whisler type linkage comprises: No. 4267653 and No. 4271615.The more early stage patent that relates to this content has No. 3572785 and No. 3722932.

For fund and this simple economic cause of assigned personnel aspect, current market almost completely is to be engaged in corrective maintenance rather than to be engaged in preventive maintenance.Arduous operating condition does not have to change and the use of plant capacity is in limit, so the carrying of system is extremely big.Past can cooperate with bucket lip closely for making linkage as long as critical loaded area exists, and Whisler bucket lip system is exactly the main device that is used.Because above-mentioned reason is not this situation now, occurred continually the linkage arm destroyed and (or) C clamp pincers and carve the damage of iron system.Almost can not predict what will take place: be to carve iron to be extruded, the C clamp pincers come off then, thereby supporting place that makes the linkage arm has damage and fracture, or not fracture but whole impaired, does still fracture appear in the linkage arm, and then locking system occurs and be extruded? we can affirm, both just are welded to one another carving iron and C clamp pincers, carve iron and also can extrude, the C clamp pincers also can be lost.So can think this be linkage lost efficacy and (or) Fundamentals of a series of damaged conditions appear.

According to our viewpoint, the appearance of this fact causes because of matching loose between linkage and bucket lip.Basic area supported is at the front end of bucket lip, and bucket lip is supporting the fork position of linkage herein, and second important supporting area be at the rear portion of linkage arm, makes with it and carves iron and the assembling of C clamp pincers is appropriate, so that operate as normal.

We have overcome this problem, and method therefor is to allow linkage system whole moving under static(al) or shock loading, rather than resembles in traditional iron formula of carving connects, and the front region that has only the C clamp pincers and carve iron has mobile.Do making stress distribution more even like this, thereby strengthened integral intensity.With the exception of this, because with existing to carve the iron mounting means different, institute has also strengthened the convenience and the reliability of user's maintenance so that installation and removal are convenient in system.At last, this locking system has overcome one anyly to be carved iron formula C clamp pincers and carves the power of vertically extruding in the iron system to being present in, and this power often causes that carving iron is pushed out assembly.Especially, the present invention clamps part to C clamp and carves the iron part and use with the spring assembly that is inserted between the two, and has formed under not carrying of linkage situation, between the two only maintenance supporting contact.

When carving iron is when combining with C clamp pincers, and this assembly that is assembled together with the rear portion of Whisler type linkage arm is complete restrained and almost do not have a deformation ability.So, when linkage was mobile as mentioned above, huge extra load was applied on the arm of the linkage of carving the iron front portion.

The theory that on bucket lip, moves based on linkage, we have imagined the design of a kind of improved Whitler type linkage system, try hard to make system can cause in carrying place wearing and tearing under the environment of matching loose and work, because present situation more than 90% belongs to this environment.

Spring was not widely used in the locking mechanism of tooth in the past.In the explanation of No. 3832077 patent, a spring that together uses with the locking pin is arranged, so that point is fixed on the linkage.Though this linkage that is illustrated is the Whisler type, it does not use the C clamp pincers and carves iron, and is to use the bolt linkage on bucket lip.Because the thread abrasion or the full fine and close foreign material that fall make the dismounting difficulty, so avoid using bolt that linkage and bucket lip are fixed together for a long time.

Have accompanying drawing in the description of this invention, wherein:

Fig. 1 illustrates the partial cut away side views of locking mechanism operating principle in the prior art briefly.

Fig. 2 is the partial cut away side views of locking mechanism of the present invention.

Fig. 3 is the partial enlarged view that is produced by slice location line 3-3 among Fig. 2.

Fig. 4 is the part section enlarged side view of an embodiment of locking mechanism of the present invention.

Fig. 5 is the decomposition diagram of locking mechanism shown in Figure 4.

Fig. 6 is the partial cut away side views of a modified version of the present invention.

Fig. 7 is the partial enlarged view that is produced by slice location line 7-7 among Fig. 6.

Fig. 8 is the part section enlarged side view of the locking mechanism shown in Fig. 6,7.

Fig. 9 is the decomposition diagram of the locking mechanism shown in Fig. 6 to Fig. 8.

Referring now to accompanying drawing, be used for a Whisler linkage especially as can be seen from Fig. 1 to be fixed on of the prior art traditional locking mechanism on the excavator-type shovel clamshell excavator leading edge (being exactly excavator bucket, shovel bucket etc.).Have a look the vector analysis of loading force vector F below more earlier.This power can become arbitrarily angled with teeth surface or linkage front end center line, and this depends on the shoveled ojbect type, excavator position and load operation process.

When the continuous bump that produces when stressed F influence is worn the area supported of bucket lip, form the gap at the A place.We think that this gap allows the upper arm of linkage to be stretched and prolongs, and underarm is squeezed and crooked, and both of these case all appears at and is close to the place, front portion of carving iron and C clamp pincers.We think to act on C clamp pincers C and carve synthesis result on the iron W and form one and extrude power, by R _WExpression, this power causes that carving iron is extruded, both box lunch was carved iron and C clamp and is clamped and be welded together.This can make C clamp pincers damaged, the damage that brings abnormal load or linkage then.Or because C clamp pincers and carve between the iron inclined-plane (shown in this figure) or owing to the keyway on the bucket lip and carve the active force of the inclination that the similar inclined-plane (shown in L) between the front surface of iron produces, caused the power of extruding.Allow the inclined-plane be present in to carve still be present in bucket lip and carve the selection that belongs to the designer between the iron between iron and the C clamp pincers, and because of the pattern of bucket lip different.Come what may, carve the inclined-plane between iron and the C clamp pincers, no matter whether skewed slot is arranged on bucket lip, R all can exert all one's strength _WEffect is extruded in generation.

If the external load that we ran into is not the F on top but the F ' of bottom, buckling phenomenon can be created in upper arm so, and tension force and stretching then appear at underarm.Since carve between iron W and the C clamp pincers C the inclined-plane or (and) direction of carving the inclined-plane between the keyway on iron W and the bucket lip all is that upper end that basis is convenient to the bucket lip from scraper bowl is installed and stipulated, so both just under the effect of load F ', extruded power R _WDirection still be as shown in the figure direction.If we select C clamp pincers and the upper-lower position of carving iron are put upside down, and can bear the increase of the workload of installing from the scraper bowl bottom and causing, always the direction of extruding so is then downward, no matter and which face F or F ' act on.Force vector from F to F ' be tower loader or the typical wobbling effectl flutter effect of hydraulic actuated excavator in loading procedure to this alternation again.

Referring to Fig. 2, the structure of the embodiment of the invention comprises: one have lay respectively at the excavator-type shovel clamshell excavator leading edge up and down Whisler type linkage 20 these linkages of the upper arm 21 of side and underarm 22 have a combination, the protuberance 24 that stretches out forward, point 25 is removably mounted on it, and by a disengageable point locking mechanism locking.This is conventional method fully.

Perforate 27 and 28 on linkage upper arm 21 and underarm 22 also meets general routine, and correspondingly, the vertical extent hole 29 that being used on bucket lip placed locking mechanism also meets conventional usually.Locking mechanism is marked as 30, and can see the details after the amplification in Fig. 3 to Fig. 5.

Referring to Fig. 5, the locking mechanism 30 of this invention comprises: carve 32 and one of iron 31, C clamp pincers movably and the gripper shoe 33 under several springs 34 effects for one.Because the matching surface of carving between iron 31 and the C clamp pincers 32 no longer is the inclined-plane, so also just can not produce the power of extruding of carving on the iron that is applied to because of the effect between them.

At work, when linkage moved, locking mechanism 30 can freely move, thereby at C clamp pincers with carve in the device of iron unfixingly, and under the effect of power F and F ' variation, last underarm can more or less consistently move.

, carve and have a tooth bar 35 on the iron 31 to the embodiments of the invention shown in Figure 5 at Fig. 2, it meshes with tooth bar 36 on the gripper shoe 33.In addition, a plurality of guide pillars that extend back 37 are housed also on the gripper shoe 33, all are equipped with spring 34 on these guide pillars.Spring 34 puts in and is arranged in the dimple 38 that C clamp clamps 32 front surfaces.

For further adjusting the spring assembly that comprises gripper shoe 33 and spring 34, we are provided with a boss 39 in the back of gripper shoe 33, a pin 40 is installed in the hole thereon, and pin 40 passes and is positioned at the horizontal-extending groove 41 on the C clamp pincers sidewall and can slides therein then.

Be installed in the hole on the boss 39 and extension slot 41 in pin 40 preferably play a part gripper shoe 33 is led and keeps the gripper shoe front end face, tooth bar 36 is arranged on this end face, it is meshed with the rear end face of carving iron 31 that has tooth bar 35.In addition, when locking mechanism 30 when bucket lip 23 moves and is crooked, guide pillar 37 often can stop spring 34 to move unexpectedly.

This invention preferably uses one to move with respect to bucket lip along with Whisler type linkage and crooked system is arranged and can allow linkage to move for the first time, rather than uses a kind of with the C clamp pincers with (allowing linkage and the closely linked purpose of bucket lip the to reach) system of carving that iron locks together.

Second kind of embodiment of this invention such as Fig. 6 are to shown in Figure 9.The part figure denote go out with Fig. 2 to Fig. 5 in the part of structure similar, but all added 100.Therefore, linkage is marked as 120, and on its protuberance 124 Digging hock end 125 is installed.The upper and lower arm 121 and 122 of linkage lays respectively at the both sides up and down of excavator-type shovel clamshell excavator leading edge 123.

In this structure, the leading section of bucket lip is being contained a cylinder 142 these cylinders instead makes Whisler type linkage be convenient to do swing and bending motion with respect to bucket lip 123.

Another difference between the embodiment among this embodiment and Fig. 2 to Fig. 5 is on the feature of carving iron 131.Although it has not had to carve the effect of iron, we still are called one and carve iron, because carve iron traditionally the object that matches with C clamp pincers being called.Here, two vertical extent surface in front and back is actual to be parallel, still has the serration of level on the rear surface, or tooth bar, represents with 135.In this embodiment, there is a vertically extending inwall 129a front portion at the opening 129 of bucket lip 123.It is obviously different with the front inner wall 29a of Fig. 2 medium dip.As aforementioned, the opening shape on existing bucket lip is how, the just selection in the design, and some designer is willing to be intended to the 29a place and uses the inclined-plane.

This embodiment and previous embodiment also have difference on the guidance method of gripper shoe 133.In this structure, we have used a pin 140 that extends forward, and it passes the perforate 141 on the C clamp pincers 132.In the axial hole 139 in the middle of this pin puts on the guide pillar 137.

In the above description, be for the purpose of description to the details introduction of this invention, thereby under the situation of not runing counter to the principle and the scope of this invention, be proficient in the people of this technology, can do many changes above-mentioned details for those.

Claims (11)

1, in an excavator, exists one and in tunneling process, generally be used for horizontally extending bucket lip; A Whisler type linkage, it has one in tunneling process, the protuberance that stretches out forward from described bucket lip; It is characterized in that, for holding locking mechanism, on the arm of above-mentioned linkage and bucket lip, all be provided with the vertical opening that is in line and arranges; The opening of above-mentioned linkage arm is positioned at the end of above-mentioned arm; A locking mechanism is installed among the above-mentioned opening removably, and this mechanism comprises the spring assembly of carving iron and C clamp pincers and inserting of discrete vertical placement between above-mentioned two parts, when above-mentioned linkage does not carry, only formed supporting contact carving between iron and the C clamp pincers, thereby when above-mentioned linkage carries, allow the above-mentioned linkage on the above-mentioned bucket lip to do swing, and avoid on the above-mentioned arm separately in opening the place ahead of above-mentioned linkage arm, occurring stretching and extrusion stress concentrated.

2,, it is characterized in that not having the inclined-plane above-mentioned carving between iron and the C clamp pincers according to the mechanism described in the claim 1.

3, according to the mechanism described in the claim 2, it is characterized in that above-mentioned C clamp pincers and the above-mentioned iron of carving have the opposing vertical face, there are a plurality of dimples in each above-mentioned dimple, to place a spring on the face of above-mentioned C clamp pincers, and between above-mentioned spring and above-mentioned surface of carving iron, insert a gripper shoe.

4, according to the mechanism described in the claim 3, it is characterized in that above-mentioned gripper shoe also has a surface to carve the surperficial relative of iron with above-mentioned, surperficial and above-mentioned the carving of each above-mentioned gripper shoe all has rack gear arrangement on the iron surface.

5, according to the mechanism described in the claim 4, it is characterized in that having pin apparatuses on the above-mentioned C clamp pincers, be above-mentioned gripper shoe guiding.

6, according to the mechanism described in the claim 5, it is characterized in that on above-mentioned gripper shoe, having a boss to clamp a side and extend towards above-mentioned C clamp, a through hole is arranged on boss, above-mentioned pin passes above-mentioned boss hole.

7,, it is characterized in that on above-mentioned gripper shoe, having the perforate that is used to hold above-mentioned pin one of in the above-mentioned guide pillar for each above-mentioned spring all has a guide pillar according to the mechanism described in the claim 5.

8, according to the mechanism described in the claim 4, it is characterized in that above-mentioned carving has second vertical surface on the iron, be used for purpose with the inner surface applying of bucket lip upper shed.

9, the mechanism described in according to Claim 8, it is characterized in that above-mentioned second vertical surface with the first time on carving iron described surface parallel.

10, the mechanism described in according to Claim 8 is characterized in that for adapting to the beveled on the above-mentioned bucket lip, and above-mentioned second vertical surface is with respect to carving on the iron described surface tilt for the first time.

11, according to the mechanism described in the claim 1, it is characterized in that above-mentioned spring assembly comprises a gripper shoe, its is pushed away above-mentioned C clamp pincers under the elastic force effect, carve the iron engagement with above-mentioned, above-mentioned gripper shoe with carve iron the surface of relative band tooth bar all arranged.

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