CN101851943A

CN101851943A - Replacing and clamping-pushing device of digging and shoveling teeth of engineering construction machines and tools

Info

Publication number: CN101851943A
Application number: CN200910068298A
Authority: CN
Inventors: 柯荣庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-30
Filing date: 2009-03-30
Publication date: 2010-10-06

Abstract

The invention relates to a replacing and clamping-pushing device of digging and shoveling teeth of engineering construction machines and tools, comprising a tooth holder, a tooth tail, a clipping unit, wherein the tooth holder is provided with a fixing part fixed on a shovel loader; the fixing part is convexly provided with an inserting part at one end far away from the shovel loader; a first perforation is arranged between both sides of the inserting part; the first perforation transversally passes through the fixing part; and the center of the first perforation is provided with a limiting part; one end of the tooth tail is provided with a slot the shape of which corresponds to that of the inserting part; both sides of the tooth tail are respectively provided with a second perforation; both the second perforation are arranged opposite to each other and are communicated with the slot; and the tooth tail is sleeved in the inserting part of the tooth holder by the slot; the clipping unit is arranged between the first perforation of the tooth holder and the second perforations of the tooth tail and can carry out telescopic sliding between the first perforation of the tooth holder and the second perforations of the tooth tail so that the tooth tail can be sleeved and positioned on the tooth holder. The invention achieves the convenience for the shovel to replace the digging and shoveling teeth and prevents pin pieces from being broken because of the impact of the tooth tail.

Description

Engineering changes and clamping-pushing device with the pick of building facility, teeth

Technical field

The present invention relates to a kind of engineering changeing and clamping-pushing device with the pick of building facility, teeth.

Background technology

As shown in figure 14, it is existing excavator pick (shovel) toothing, it is to have pick (shovel) tooth 9 that several layouts such as grade are provided with on a scraper bowl, respectively this pick (shovel) tooth 9 comprises a toothholder 90 and a tooth tail 91 respectively, this toothholder 90 has first perforation 901 that laterally runs through, and this tooth tail 91 is to be sheathed on this toothholder 90, and has a pair of second perforation 911 that should toothholder 90 first perforation 901 respectively in these tooth tail 91 both sides, and use a hammer 93 with a pin member 92 via this tooth tail 91 wherein a side second the perforation 911 beat this first the perforation 901 in, relend by a C type and buckle 902 with after this pin member 92 being positioned this first perforation 901, its two ends convexedly stretch in respectively this second perforation 911, are positioned on this toothholder 90 to limit this tooth tail 91.

There is following problem in above-mentioned existing excavator pick (shovel) toothing:

1, by among Figure 15 and Figure 16 as seen, respectively 9 in (shovel) tooth should be dug on this scraper bowl because spacing distance is limited, then when this pin member 92 when beaing into the predeterminated position of this first perforation before 901, and can't reserve and beat distance and the suitable angle of beaing fully, so must and be placed in the narrow and small clearance space hammer 93 side-swaies usually and beat, when this pin member 92 in pass this second the perforation 911 enter again this first the perforation 901 appropriate depth after, just can hand iron hammer 93 again and be located at an angle of inclination, and auxiliary strike bar 94 and beat this pin member 92 again by one, so that can completely inserting and be positioned first perforation 901 and second of this toothholder 90 and this tooth tail 91, this pin member 92 bores a hole 911, therefore, this pin member 92 is in being carried out the process of beaing, its partial structurtes will easily cause distortion and integrally bending because of beaing, and increase greatly in the future in the puzzlement of changing this pick (shovel) tooth 9.

2, when this scraper bowl shovels in the operation process in digging, because this pin member 92 and this first perforation 901 and this second 911 of perforation have the gap, therefore foreign matter can be packed in the gap unavoidably, hard thing then may cause this pin member 92 in respectively this perforation 901 if foreign matter is microlith or metal etc., stuck in 911, when and for example foreign matter is muddy, then can block in this pin member 92 and respectively this perforation 901,911, therefore, when this pin member 92 is desired by respectively this perforation 901, when separating in 911, then must remove foreign matter earlier just can separate again, severe patient then must destroy this pick (shovel) tooth 9, for example cuts to destroy the overall structure of this pick (shovel) tooth 9 with oxyhydrogen flame.

3, as shown in figure 17, it is the action schematic diagram that desire is dismantled this pin member 92, it is first perforation 901 that passes outermost toothholder 90 by a body 95, make these body 95 1 ends be resisted against the pin member of desiring to pull down 92 again, beat with hammer 93 so that this pin member 92 can be recessed out this C type again and buckle 902, in this first perforation 901 and this second perforation 911, break away from again, so necessary so reason of operation, be because the spacing distance of 9 in each pick (shovel) tooth limits to some extent, and the strength that hammer 93 knocks must make this pin member 92 recess out this C type and buckle 902, therefore, with the inconvenience that causes in the field-strip process.Moreover, if when this pin member 92 produce stuck as described above or foreign body obstruction when respectively this perforation 901,911 and this C type are buckled 902, then will cause field-strip difficult more.

4, see also Figure 18 to Figure 19, wherein, this toothholder 90 and this tooth tail 91 are after group is established, then still have a gap A between the two, and also have a gap B between this second perforation 911 and this pin member 92, therefore, when this tooth tail 91 in the digging operation process and when abutting against in this toothholder 90, because the distance of this gap B is greater than this gap A, so this pin member 92 can directly not be subjected to the bump of this tooth tail 91 in the two ends that protrude out this first perforation 901.

Yet, when having the gap between this toothholder 90 and this tooth tail 91, make this tooth tail 91 produce back the cushion space that hits this toothholder 90, but cause the two to touch the distortion at position easily; Moreover when healing when big in the gap, the strength of its bump is stronger, then easily makes 91 on this toothholder 90 and tooth tail more be easy to generate damage, and each second perforation 911 that easily makes this tooth tail 91 because of and 92 generations of this pin member rub and produce the phenomenon of reaming; Again as shown in figure 20, the respectively phenomenon of these second perforation, 911 generation reamings when this

tooth tail

91, and 91 on this toothholder 90 and this tooth tail are when collision causes this gap A greater than this gap B for a long time, this moment, this tooth tail 91 was to be resisted against this pin member 92 but not this toothholder 90 in digging operation, so this pin member 92 then directly is subjected to this tooth tail 91 collision back and forth in mining process, therefore, normal this pin member 92 that takes place produces the situation that ruptures and cause this tooth tail 91 to come off in digging operation, it is except that the puzzlement that causes digging operation, if this tooth tail 91 is dropped then to have by eminence and pounds the danger of hurting sb.'s feelings.

Therefore, the pick of existing excavator (shovel) toothing is when changing, in fact only only for this pin member 92 being dismantled with regard to necessary cost more than 10 minute even more than half an hour, therefore, suitable inconvenience in the dismounting operation of existing pick (shovel) tooth 9, and existing pick (shovel) tooth 9 easily is impacted and ruptures in mining process, and the problems referred to above are the emphasis place that institute of the present invention desire solves.

Summary of the invention

Technical problem underlying to be solved by this invention is, overcome the above-mentioned defective that prior art exists, and providing a kind of engineering with the changeing and clamping-pushing device of pick (shovel) tooth of building facility, it reaches scraper bowl and changes the convenience of digging (shovel) tooth, and prevents that pin member is hit by the tooth rear-end collision and ruptured.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of engineering changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: a toothholder, has a fixed part that is fixed in a scraper bowl, this fixed part plugs portion in convexing with one away from this scraper bowl one end, it has one first perforation between both sides, this first perforation is laterally through this fixed part, and is provided with a limiting section in this first perforation centre; One tooth tail, Yu Yiduan have one and plug the slot of portion's correspondingly-shaped with this, and are respectively equipped with one second perforation in these tooth tail both sides, and respectively this second perforation is to be to be oppositely arranged and to be connected with this slot, and this tooth tail is sheathed on the portion that plugs of this toothholder with this slot; One clip unit is to be arranged at respectively between this second perforation of first perforation of this toothholder and this tooth tail, and in first perforation of this toothholder and the respectively scalable slippage between this second perforation of this tooth tail, for this tooth tail socket and being positioned on this toothholder.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, wherein the clip unit comprises two bumping posts and an elastic component, respectively this bumping post is inserted in this first perforation two ends that plug portion respectively, and respectively this bumping post protrudes out the outer and correspondence of this first perforation respectively in an end wherein and convexedly stretches in respectively this and second bore a hole, and respectively this bumping post has a groove respectively at the end in this first perforation, respectively this groove is setting in opposite directions, and be provided with this elastic component between two grooves, the two ends of this elastic component lay respectively at respectively in this groove to shore respectively this bumping post.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, and wherein elastic component is to shore spring.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, and wherein elastic component is a polyurethane PU (Polyurethane).

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, and wherein each bumping post is respectively at the sheathed at least one catch ring of periphery, for preventing that foreign matter from plugging gap between portion via this bumping post respectively and this and entering in the groove of this bumping post respectively.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, wherein the aperture of each second perforation is less than the external diameter of this bumping post, and the two lateral walls of this tooth tail in this slot has a short slot that is connected with this second perforation respectively, and respectively form a barricade respectively with aperture difference between this second perforation and each short slot, respectively this barricade confession block respectively this bumping post in each short slot.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, wherein the clip unit is two bumping posts, respectively this bumping post is a magnet, respectively this bumping post is inserted in this first perforation two ends that plug portion respectively, and respectively this bumping post protrudes out the outer and correspondence of this first perforation respectively in an end wherein and convexedly stretches in respectively this second perforation, and two bumping posts in this first in boring a hole an end in opposite directions be like pole.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, and wherein each bumping post is respectively at the sheathed at least one catch ring of periphery, for preventing that foreign matter from plugging gap between portion via this bumping post respectively and this and entering to respectively in this bumping post

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, wherein the aperture of each second perforation is less than the external diameter of this bumping post, and the two lateral walls of this tooth tail in this slot has a short slot that is connected with this second perforation respectively, and be to form a barricade respectively with aperture difference between this second perforation and each short slot respectively, respectively this barricade be confession respectively this bumping post be adsorbed in respectively this barricade and block in each short slot.

The pick of building facility of aforesaid engineering, changeing and clamping-pushing device of teeth, wherein the clip unit comprises two bumping posts and an elastic component, respectively this bumping post is inserted in this first perforation two ends that plug portion respectively, and respectively this bumping post protrudes out the outer and correspondence of this first perforation respectively in an end wherein and convexedly stretches in respectively this and second bore a hole, this tooth tail has lead angle in this second perforation respectively towards a side of this slot opening, respectively this bumping post then has lead angle outside towards a side of this fixed part direction respectively at protruding out the outer end of this first perforation, should fit this tooth tail in the interior lead angle of this second perforation by outer lead angle, and should outer lead angle degree of depth less than lead angle in this, and respectively this bumping post is bored a hole in second of the opposite side of outer lead angle and this tooth tail and is had an elastic space between inwall.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, and wherein each bumping post is in an end that protrudes out this first perforation, outside this opposite side of lead angle have another corresponding outside lead angle.

Aforesaid engineering changes and clamping-pushing device with the pick of building facility, teeth, and wherein elastic component is a polyurethane.

Aforesaid engineering is with the pick of building facility, the clamping-pushing device of teeth, and wherein each bumping post is respectively at the sheathed at least one catch ring of periphery, for preventing that foreign matter from plugging gap between portion via this bumping post respectively and this and entering in the groove of this bumping post respectively.

The invention has the beneficial effects as follows that it reaches the convenience that scraper bowl is changed pick (shovel) tooth, and prevent that pin member is hit by the tooth rear-end collision and ruptured.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a three-dimensional combination schematic diagram of the present invention

Fig. 2 is a perspective exploded view of the present invention

Fig. 3 is a separation generalized section of the present invention

Fig. 4 is an assembling process schematic diagram of the present invention

Fig. 5 is that schematic diagram is finished in assembling of the present invention

Fig. 6 is the cross-sectional view of the second embodiment of the present invention

Fig. 7 is the cross-sectional view of the third embodiment of the present invention

Fig. 8 is the perspective exploded view of the fourth embodiment of the present invention

Fig. 9 is the schematic diagram of the present invention in initial alignment

Figure 10 is the present invention produces bump in digging operation a schematic diagram

Figure 11 is the schematic diagram that each bumping post slippage of the present invention is adjusted

Figure 12 is the schematic diagram that the present invention locatees after the slippage adjustment

Figure 13 is a fifth embodiment of the present invention cross-sectional view

Figure 14 is the perspective exploded view of existing pick (shovel) tooth

Figure 15 be existing pick (shovel) tooth location one pin member overlook the action schematic diagram

Figure 16 is the side-looking action schematic diagram of location one pin member of existing pick (shovel) tooth

Figure 17 be existing pick (shovel) tooth separate a pin member overlook the action schematic diagram

Figure 18 is the diagrammatic cross-sectional side elevation of existing pick (shovel) tooth

Figure 19 is toothholder of existing pick (shovel) tooth and the gap schematic diagram between the tooth tail

Figure 20 is that a pin member of existing pick (shovel) tooth is clashed into the schematic diagram of fracture

The specific embodiment

See also Fig. 1 to Fig. 5, be the selected example structure of the present invention shown in the figure.

Present embodiment provides changeing and clamping-pushing device of the pick of a kind of engineering with the construction facility, teeth, and it comprises:

One toothholder 1 has a fixed part 11, and as Fig. 1 and shown in Figure 2, this toothholder 1 is the leading edge that is located in a scraper bowl 2 with its fixed part 11, and by a welding sequence so that this fixed part 11 is incorporated on this scraper bowl 2.

This fixed part 11 plugs portion 12 in convexing with one away from these scraper bowl 2 one ends, and it has one first perforation 121 between both sides, and this first perforation is 121 laterally through this fixed part 11, and is provided with a limiting section 122 in these first perforation, 121 centre.

One tooth tail 5, one end has one and plugs the slot 51 of portion's 12 correspondingly-shaped with this, and be respectively equipped with one second perforation 52 in these tooth tail 5 both sides, respectively this second perforation 52 is to be to be oppositely arranged and to be connected with this slot 51, and this tooth tail 5 is the portions that plug 12 that are sheathed on this toothholder 1 with this slot 51.

One clip unit 7 is 52 of each second perforation that are arranged at first perforation 121 of this toothholder 1 and this tooth tail 5, and in first perforation 121 of this

toothholder

1 and 52 flexible slippages of each second perforation of this tooth tail 5, for this tooth tail 5 sockets and being positioned on this toothholder 1.In present embodiment, this clip unit 7 comprises two bumping posts 3 and an elastic component 4.

Each bumping post 3 is inserted in this first perforation, 121 two ends that plug portion 12 respectively, and respectively this bumping post 3 protrudes out the outer and correspondence of this first perforation 121 respectively in an end wherein and convexedly stretches in respectively this and second bore a hole in 52, in present embodiment, the aperture of each second perforation 52 is less than the external diameter of this bumping post 3, and the two lateral walls of this tooth tail 5 in this slot 51 have respectively one with this second the perforation 52 short slots that are connected 53, and respectively this

second perforation

52 and 53 of each short slots form a barricade 54 respectively with aperture difference, each barricade 54 confession block respectively this bumping post 3 go out each second perforation 52 to avoid each bumping post 3 escape in each short slot 53.

And each bumping post 3 has a groove 32 respectively at the end in this first perforation 121, each groove 32 is setting in opposite directions, and be provided with elastic component 4 in 32 of two grooves, the two ends of this elastic component 4 lay respectively at respectively in this groove 32 shoring respectively this bumping post 3, and this elastic component 4 is to shore spring in present embodiment.

In addition, when this bumping post 3 respectively in this first perforation 121 during retraction, by the block of the limiting section 122 of this first perforation in 121, make the stroke of two bumping posts 3 slippage in this first perforation 121 identical, this purpose is the strength that average 4 pairs two bumping posts 3 of this elastic component are shored.Moreover respectively this bumping post 3 is respectively at the sheathed at least one catch ring 31 of periphery, enters to for preventing foreign matter from plugging the gap of 12 in portion via this bumping post 3 respectively and this in groove 32 of this bumping post 3 respectively.

From the above, owing to shovel when digging operation, foreign matters such as microlith that is produced in operation or metal may fall into the respectively gap of 52 of this second perforation of respectively this bumping post 3 and this tooth tail 5, therefore, be to be arranged with two catch rings 31 by this bumping post 3 respectively in the present embodiment in periphery, then when foreign matter still falls into accidentally, can carry out block by each catch ring 31, to prevent that foreign matters such as microlith or metal from entering respectively this bumping post 3 and this tooth tail 5 respectively in this second perforation 52, then can avoid respectively this bumping post 3 produces situation stuck or that block in each first perforation 121.

When toothholder 1 of the present invention is established with 5 groups on tooth tail, extremely shown in Figure 5 as Fig. 4, it is to utilize a clamping instrument 6 (be as shown in FIG. a C type pincers) with in first perforation 121 that two bumping posts 3 is pressed into this toothholder 1 earlier and plugs portion 12, and the slot 51 of this tooth tail 5 is sheathed on this plugs portion 12, making respectively, this bumping post 3 abuts against earlier in the inboard leading edge of this tooth tail 5 slots 51 in the part of these tooth tail 5 slots 51 inner edges, after decontroling this clamping instrument 6 again, and with the directly sheathed portion that plugs 12 of going into this toothholder 1 of the slot 51 of this tooth tail 5, at this moment, 3 respectively these barricades 54 with respectively this second perforation 52 of these tooth tail 5 both sides of two bumping posts are corresponding mutually, and by the elasticity of this elastic component 4 shore that the power contact ejects and pairing respectively this second perforation, 52 respectively this barricade 54 that stretches through in, so as to locating this tooth tail 5 on toothholder 1; Otherwise, desire with this tooth tail 5 when dismantling on this toothholder 1, then through this second perforation 52 respectively two bumping posts 3 are pressed in this respectively this first perforation 121 that plugs portion 12 earlier by this clamping instrument 6, make two bumping posts 3 in this slot 51, abut against slot 51 inner edges again, and behind this clamping instrument 6 of relieving, this tooth tail 5 can be separated on this toothholder 1 in this tooth tail 5.

Therefore, be not difficult to find the invention has the advantages that by above-mentioned explanation:

1, when this tooth tail 5 is desired to be mounted on this toothholder 1, only need by a clamping instrument 6 two bumping posts 3 are pressed in this first perforation 121, again this tooth tail 5 is sheathed on this toothholder 1, two bumping posts 3 are protruded out for respectively promptly finishing Assembly Action in this second perforation 52, therefore, even the spacing distance of each pick (shovel) between cog on scraper bowl is limited, also can not influence assembling operation, and do not need not only to save time but also laborsaving by beaing of requiring great effort.

2, owing to be to be arranged with catch ring 31 on this bumping post 3 respectively, thus can carry out the block of foreign matter, with prevent foreign matters such as microlith or metal enter respectively this bumping post 3 and this tooth tail 5 respectively this second is bored a hole in 52, and guarantee that two bumping posts 3 are smooth and easy without hindrance when slippage.

3, when desire is dismantled this tooth tail 5 on by this toothholder 1, only need two bumping posts 3 are pressed in this first perforation 21, this tooth tail 5 directly can be separated then suitable convenience and fast in the operation of changing tooth tail 5.

Certainly, still there are many examples in the present invention, therebetween the only variation on the details.See also Fig. 6, it is the second embodiment of the present invention, and wherein, this elastic component 4A is a polyurethane, its can reach equally with first embodiment in the identical effect of shoring.

See also Fig. 7, it is the third embodiment of the present invention, wherein, this clip unit 7 is two bumping post 3A, each bumping post 3A is a magnet, and two bumping post 3A in this first perforation in 121 an end in opposite directions be like pole, in present embodiment, it is replaced the magnetic that the elastic component among first embodiment 4 changes by each bumping post 3A itself, and because each bumping post 3A is originally as metal material, then can become magnet by a magnetization operation, and as shown in Figure 7, the end of each bumping post 3A in this first perforation 121 is all the S utmost point, so that two bumping post 3A after this first perforation 121 of retraction, can relend the principle of being repelled each other by the same sex and eject automatically, and adsorbable in each barricade 54 and block in each short slot 53, for be limited to this toothholder 1 first the perforation 121 and this tooth tail 5 second the perforation 52, so still can reach with first embodiment in the use elastic component 4 so that each bumping post 3 fastens the identical effect of location.

See also Fig. 8, it is the fourth embodiment of the present invention, wherein, this tooth tail 5 in respectively this second the perforation 52 sides towards these slot 51 openings have lead angle 55 in, each bumping post 3 then has lead angle 33 outside towards a side of these fixed part 11 directions respectively at protruding out these first perforation, 121 outer ends, should outer lead angle 33 be to fit this tooth tail 5 in the interior lead angle 55 of this second perforation 52, and be somebody's turn to do outer lead angle 33 degree of depth less than lead angle in this 55, do not produce the gap of bump each other for keeping this

toothholder

1 and 5 on this tooth tail.

As shown in Figure 9, it is this tooth tail 5 when being mounted on this toothholder 1, and the outer lead angle 33 of two bumping posts 3 is and 55 initial positions of replacing of interior lead angle of this tooth tail 5, is to be subjected to replacing of two bumping posts 3 between visible this toothholder 1 and this tooth tail 5 among the figure, so the gap of no slippage.

Yet, extremely shown in Figure 12 as Figure 10, when this tooth tail 5 produces bump in carrying out digging operation, 5 on this tooth tail can be as shown in figure 10 and relative moving in this toothholder 1 direction, at this moment, 3 of two bumping posts are as shown in figure 11 because of being subjected to shoring of this elastic component 4 protruding, make this tooth tail 5 can be in it lead angle 55 abut against in the outer lead angle 33 of this bumping post 3 respectively and be subjected to block, so this

toothholder

1 and 5 gaps of still keeping no slippage of this tooth tail.

In addition, each bumping post 3 in the opposite side of outer lead angle 33 be and second perforation, 52 inwalls of this tooth tail 5 between have an elastic space 8, this is that the outer lead angle 33 that cooperates each bumping post 3 during slippage, is avoided this tooth tail 5 space that each bumping post 3 of direct collision is reserved when digging operation between interior lead angle 55 degree of depth of this tooth tail 5.

Therefore, because in digging operation, when 5 on this toothholder 1 and tooth tail produce bump because of carrying out digging operation, then can outwards shore displacement by two bumping posts 3, but and fit in this outer lead angle 53 and this tooth tail 5 of block with lead angle in it 33, make the gap of no slippage between this tooth tail 5 and the toothholder 1, so 5 on this toothholder 1 and tooth tail do not have the cushion space of bump mutually, and can avoid the two because of clashing into the damage that is caused mutually, and pass through elastic space 8 designs of 3 of this tooth tail 5 and each bumping posts,, this tooth tail 5 causes the generation of each bumping post 3 fracture situation so that can not striking each bumping post 3, so pick of the present invention (shovel) tooth has quite safe structure.

See also Figure 13 again, it is the fifth embodiment of the present invention, and wherein, each bumping post 4 is in protruding out this first perforation, end of 121, outside this opposite side of lead angle 33 have another corresponding outside lead angle 33.

Claims

1. an engineering is characterized in that with the changeing and clamping-pushing device of the pick of building facility, teeth:

One toothholder, have a fixed part that is fixed in a scraper bowl, this fixed part plugs portion in convexing with one away from this scraper bowl one end, and it has one first perforation between both sides, this first perforation is laterally through this fixed part, and is provided with a limiting section in this first perforation centre;

One tooth tail, Yu Yiduan have one and plug the slot of portion's correspondingly-shaped with this, and are respectively equipped with one second perforation in these tooth tail both sides, and respectively this second perforation is to be to be oppositely arranged and to be connected with this slot, and this tooth tail is sheathed on the portion that plugs of this toothholder with this slot;

One clip unit is to be arranged at respectively between this second perforation of first perforation of this toothholder and this tooth tail, and in first perforation of this toothholder and the respectively scalable slippage between this second perforation of this tooth tail, for this tooth tail socket and being positioned on this toothholder.

2. the engineering according to claim 1 pick of building facility, changeing and clamping-pushing device of teeth, it is characterized in that: described clip unit comprises two bumping posts and an elastic component, respectively this bumping post is inserted in this first perforation two ends that plug portion respectively, and respectively this bumping post protrudes out the outer and correspondence of this first perforation respectively in an end wherein and convexedly stretches in respectively this and second bore a hole, and respectively this bumping post has a groove respectively at the end in this first perforation, respectively this groove is setting in opposite directions, and be provided with this elastic component between two grooves, the two ends of this elastic component lay respectively at respectively in this groove to shore respectively this bumping post.

3. engineering according to claim 2 changes and clamping-pushing device with the pick of building facility, teeth, and it is characterized in that: described elastic component is to shore spring.

4. engineering according to claim 2 changes and clamping-pushing device with the pick of building facility, teeth, and it is characterized in that: described elastic component is a polyurethane PU (Polyurethane).

5. engineering according to claim 2 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: described each bumping post is respectively at the sheathed at least one catch ring of periphery, for preventing that foreign matter from plugging gap between portion via this bumping post respectively and this and entering in the groove of this bumping post respectively.

6. engineering according to claim 2 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: the aperture of described each second perforation is less than the external diameter of this bumping post, and the two lateral walls of this tooth tail in this slot has a short slot that is connected with this second perforation respectively, and respectively form a barricade respectively with aperture difference between this second perforation and each short slot, respectively this barricade confession block respectively this bumping post in each short slot.

7. engineering according to claim 1 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: described clip unit is two bumping posts, respectively this bumping post is a magnet, respectively this bumping post is inserted in this first perforation two ends that plug portion respectively, and respectively this bumping post protrudes out the outer and correspondence of this first perforation respectively in an end wherein and convexedly stretches in respectively this second perforation, and two bumping posts in this first in boring a hole an end in opposite directions be like pole.

8. engineering according to claim 7 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: described each bumping post is respectively at the sheathed at least one catch ring of periphery, for preventing that foreign matter from plugging gap between portion via this bumping post respectively and this and entering to respectively in this bumping post.

9. engineering according to claim 7 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: the aperture of described each second perforation is less than the external diameter of this bumping post, and the two lateral walls of this tooth tail in this slot has a short slot that is connected with this second perforation respectively, and be to form a barricade respectively with aperture difference between this second perforation and each short slot respectively, respectively this barricade be confession respectively this bumping post be adsorbed in respectively this barricade and block in each short slot.

10. the engineering according to claim 1 pick of building facility, changeing and clamping-pushing device of teeth, it is characterized in that: described clip unit comprises two bumping posts and an elastic component, respectively this bumping post is inserted in this first perforation two ends that plug portion respectively, and respectively this bumping post protrudes out the outer and correspondence of this first perforation respectively in an end wherein and convexedly stretches in respectively this and second bore a hole, this tooth tail has lead angle in this second perforation respectively towards a side of this slot opening, respectively this bumping post then has lead angle outside towards a side of this fixed part direction respectively at protruding out the outer end of this first perforation, should fit this tooth tail in the interior lead angle of this second perforation by outer lead angle, and should outer lead angle degree of depth less than lead angle in this, and respectively this bumping post is bored a hole in second of the opposite side of outer lead angle and this tooth tail and is had an elastic space between inwall.

11. engineering according to claim 10 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: described each bumping post is in an end that protrudes out this first perforation, outside this opposite side of lead angle have another corresponding outside lead angle.

12. engineering according to claim 10 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: described elastic component is to shore spring.

13. engineering according to claim 10 changes and clamping-pushing device with the pick of building facility, teeth, it is characterized in that: described elastic component is a polyurethane.

14. the engineering according to claim 10 pick of building facility, the clamping-pushing device of teeth, it is characterized in that: described each bumping post is respectively at the sheathed at least one catch ring of periphery, for preventing that foreign matter from plugging gap between portion via this bumping post respectively and this and entering in the groove of this bumping post respectively.