CN101096088A - A hammer drill and the cylinder support structure thereof - Google Patents

A hammer drill and the cylinder support structure thereof Download PDF

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Publication number
CN101096088A
CN101096088A CNA2007101279426A CN200710127942A CN101096088A CN 101096088 A CN101096088 A CN 101096088A CN A2007101279426 A CNA2007101279426 A CN A2007101279426A CN 200710127942 A CN200710127942 A CN 200710127942A CN 101096088 A CN101096088 A CN 101096088A
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CN
China
Prior art keywords
cutting tool
cylinder
piece
piston
anchor clamps
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Pending
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CNA2007101279426A
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Chinese (zh)
Inventor
乌尔里希·毕凯沙
马克·浩特域
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Black and Decker Inc
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Black and Decker Inc
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Publication of CN101096088A publication Critical patent/CN101096088A/en
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  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

A hammer drill comprising: a housing; a stationary cylinder (52), having two ends (850,854), mounted within the housing; a piston (50) slideably mounted within the cylinder (52); a drive mechanism which converts the rotary output of the motor (32) into a reciprocating motion of the piston (50) within the cylinder; a ram (54) slideably mounted within the cylinder (52), forward of the piston (50), and which is reciprocatingly driven by the piston (50) via an air spring (56); a beat piece support structure mounted in the housing forward of the cylinder (52); a beat piece (58) slideably supported within the beat piece support structure which is repetitively struck by the reciprocating ram (54) and which in turn repetitively strikes an end (402) of a tool; wherein the stationary cylinder (52) is mounted within the housing by having its ends (850,854) sandwiched between two parts (852,856) of the housing (2,502) to hold it stationary.

Description

Percussion drill and cylinder fixture thereof
Technical field
The present invention relates to a kind of percussion drill, relate in particular to a kind of road breaker.
Background technology
Percussion drill has three kinds of operator schemes usually.Such percussion drill generally comprises installation rotating axle (or main shaft) in the enclosure, and the rotating driving device that described axle can be set up in the enclosure optionally drives.Rotating driving device also is that the motor that is positioned at shell drives.Axle drives the cutting tool cutting tool clamper of percussion drill rotatably, but clamper drive rotatably then for example be drill bit etc. be fixed in cutting element in the clamper with delivery mode., axle inside is equipped with piston usually, and described piston can reciprocally be driven by impact driving mechanism, thereby the rotation of motor is driven the reciprocal driving that transforms into piston.A plunger that slidably is installed in the place ahead axle inside and that be positioned at piston, by piston because continuous boosting and step-down and reciprocally driving in the air cushion that forms between piston in the axle and the plunger.Plunger impacts the piece that impacts in the axle that is installed in plunger the place ahead with sliding type repeatedly, the described piece that impacts is delivered to the place ahead on the cutting element that is fixed to releasedly in the anterior cutting tool clamper of percussion drill to impacting from plunger then, makes instrument can limit the reciprocating motion of degree.The rotation that mode shift mechanism could engage and break away from center roller selectively drives and/or to the reciprocal driving of piston.Three kinds of operator schemes of such percussion drill are; Hit mode, wherein driven plunger reciprocally only; Drill mode, wherein drive spindle rotatably only; Impact and drill mode, wherein not only reciprocally driven plunger but also drive spindle rotatably.
EP1157788 discloses a kind of like this percussion drill.
This percussion drill generally includes three kinds of operator schemes, yet the percussion drill that only has a kind of or two kinds of operator schemes is also quite general.For example, polytype percussion drill is arranged, it only has drillable a kind of pattern and generically is called awl.
The percussion drill that another kind has the single operation pattern is exactly a road breaker.
Road breaker is the percussion drill that only has the single operation pattern, only has hit mode (being sometimes referred to as the chisel pattern) that is:.Road breaker tends to be relatively large-scale percussion drill, makes himself weight can be used to assist the operation of road breaker.Though a road breaker fully might be grasped in operator's hand fully in theory, general, their weight makes this usage not establish reality or has limited the number of times of such operation at least.Therefore, when manually-operated, road breaker generally be used to down to engineering operation, like this, the cutting tool cutting tool that is clamped in the cutting tool cutting tool clamper contacts with ground, and the weight of road breaker is transferred on the ground by cutting element.
EP1475190 discloses a kind of like this road breaker.
During the operation road breaker, its inner plunger impacts cutting element such as chisel etc. repeatedly through impacting piece, and described cutting element is clamped in the cutting tool clamper, and described cutting tool clamper is positioned at the lower end of road breaker main body.Plunger and piston are installed on one fixedly in the cylinder with form slidably usually.This cylinder can not rotate or sliding motion.
Figure 19 A and 19B show the fixedly cylinder of prior art, and fixedly cylinder is used one on the percussion drill with single operation pattern, and this percussion drill only has hit mode.Figure 19 A shows the fixedly side of cylinder, and Figure 19 B shows this fixedly cross section of cylinder.
Fixedly cylinder has comprised a slender type and has had the tube-like piece 800 at two ends 802,804.A shoulder 806 forms at the circumferential perimeter place of tube-like piece 800 and at contiguous first end 802 places.The overall diameter of shoulder 802 is greater than the overall diameter of tube-like piece 800.A groove (groove) 808 forms around shoulder 806.A piston and a plunger are slidably mounted in the tube-like piece 800, and it is right-hand that plunger then is shown in piston as Figure 19 A and 19B.Piston can be able to reciprocally be driven by the reverse bar of tube-like piece 800 first ends 802.Cylinder is fixed in the housing of hammer drill.
Support member in housing (or supporter) 812 (only illustrating at Figure 19 B) engages with the both sides 810 of tube-like piece, thereby is the cylinder location.Yet supporter 812 is the axial location of control cylinder not, or prevents moving axially of cylinder.The part 814 of housing combines by a figure clevis with shoulder 806, moves axially or because rotatablely moving of causing of CONTACT WITH FRICTION because of cylinder that figure clevis 816 and engaging of groove 808 cause preventing.
Support member 812 provides extra frictional engagement and helps prevent and rotatablely moves.
Fig. 1 to 6 is shown as the cutting tool that typically is used for road breaker in the prior art and the design of cutting tool clamper.
With reference to figure 1, a kind of design of cutting element has been described.This cutting instrument with for example be a kind of road breaker that can be used for these types chisel as an example.
Cutting element (or cutting tool) comprises joining with a work piece and merges the working end (not shown) be formed at bar handle 400 1 ends.Work piece can for example be a concrete floor.Bar handle 400 has cross section and longitudinal axis 408 that is hexagonal shape.Another link 402 with respect to the working end has comprised a bindiny mechanism.
First kind of bindiny mechanism is that the form with rib constitutes, and described rib forms round the circumference of bar handle 400, and is positioned at the far-end preset distance place apart from the link 402 of bar handle.Second kind of bindiny mechanism constitutes with the form of groove 406, and groove 406 is formed at a side of bar handle 400 along the part of the length of bar handle 400, is positioned at the far-end preset distance place apart from the link 402 of bar handle.The third type as shown in Figure 1, not only comprises rib 404 but also comprise groove 406.
Cutting tool with first type of bindiny mechanism is used for engaging and first type cutting tool clamper 404 of clamping rib 404 is used.Cutting tool with second type of bindiny mechanism is used for being used for second type cutting tool clamper of clamping cutting tool and using with engaging with groove 406.Cutting tool with the third type bindiny mechanism is used for and first type the cutting tool clamper that can adopt bindiny mechanism's clamping cutting tool of first type, can adopt second type cutting tool clamper of second kind of bindiny mechanism's clamping cutting tool, perhaps can adopt the cutting tool clamper of bindiny mechanism's clamping cutting tool of the third type to use together.
Yet, can utilize in three types of bindiny mechanisms any one to be used for the design of cutting tool clamper of clamping cutting tool and exist.A kind of like this cutting tool clamper will be described now.
With reference to figure 1, cutting tool clamper 500 comprises cutting tool clamper shell 502, and described cutting tool clamper shell 502 is made of single metal casting, and described single metal casting utilizes standard bolt 506 series and is connected on the intermediate case 504.The flange 510 that a plurality of holes 508 are run through around cutting tool clamper shell 502 upper ends forms.A plurality of corresponding apertures 512 are through the substrate 514 of intermediate case 504 and form.Bolt 506 passes the hole 508 in cutting tool clamper shell 502 flanges 510, passes the hole 512 by intermediate case 504 substrates 514 subsequently again.Standard nut 518 is rotated on the end of bolt 506 of the substrate 514 that is adjacent to intermediate case 516, so that cutting tool clamper shell 502 is fixed on the intermediate case 504.
Being integrally formed in the cutting tool clamper shell 502 is the tubular recess 520 with hexagonal cross-section, and it is used for holding the link 402 of bar handle 400.The hexagonal cross-section of groove 520, the corresponding hexagonal cross-section of bar handle 400, and their sizes separately can prevent that cutting tool from producing rotation in groove 520.
Tubular conduit 522 forms on the width of cutting tool clamper shell 502 crossing one.The shape of cross section of tubular conduit 522 is oval.Tubular conduit 522 heart place therein runs through the top that intersects at (intersects) tubular recess 520.Metallic rod 524 with circular cross-section runs through the total length of tubular conduit 522, and the end 526 of metallic rod 524 extends out to the both sides of cutting tool clamper shell 502.The center 560 of metallic rod 524 comprises a circular groove 528 that laterally forms, and its depth capacity in the center is half of metallic rod 524 width (or thickness).Comprise the top that the center of the metallic rod 524 of groove 528 is located in tubular recess 520 tops and crosses described tubular recess 520.
Metallic rod 524 can be around the rotation freely in tubular conduit 522 of its longitudinal axis 530, and the longitudinal axis 530 of described metallic rod 524 is parallel with the longitudinal axis of tubular conduit 522.When cutting tool was positioned at the inside of cutting tool clamper 500, the ellipse of passage can make metallic rod 524 slide along the direction (arrow M indication) of the direction that is parallel to the cutting tool longitudinal axis 408.
There are U-shaped anchor clamps 532 to be installed on rigidly on the two ends 526 of metallic rod 524.U-shaped anchor clamps 532 comprise two ends 534, and described two ends 534 form with the shape of annulus.Two bar holes 536 of annulus 534 are coaxial and toward each other.Link to each other with the ring 534 of each end for cranking arm 538.Two ends of 538 of cranking arm link to each other with semicircle crotch 540, and Fig. 1 more is shown clearly in.The internal diameter of crotch 540 is greater than the internal diameter of bar handle 400, but less than the external diameter of cutting tool rib 404.The ring 534 of end, crank arm 538 and crotch 540 by steel with the integral structure manufacturing.
Porose 542 ends 526 of running through metallic rod 524 form, and the axle in hole 542 is parallel to each other, and perpendicular with the longitudinal axis 530 of metallic rod 524.Porose 544 end loops 534 that run through U-shaped anchor clamps 532 form, and the axle in hole 544 is parallel to each other, and perpendicular with the axle in the bar hole 536 of end loops 534.The end of metallic rod 524 be positioned at end loops 534 bar hole 536 inside and be directed, make the hole 542 of metallic rod 524 aim at (referring to Fig. 4) with the hole 544 of end loops 534.There is the pin (not shown) to pass every group of mating holes 542,544, end loops 534 is rigidly connected on the end 526 of metallic rod 524.
Metallic rod 524 is held (hold) in tubular conduit 522 by two rubber rings that compress 546, and described two rubber rings that compress 546 are positioned at 548 inside, hole, and described hole 548 is formed at cutting tool clamper shell 502 sides (referring to Fig. 1).Rubber ring 546 is biased into metallic rod 524 center of tubular conduit 522 inside.Yet by compressing rubber ring 546, metallic rod 524 can the direction (arrow M) along the direction that is parallel to the cutting tool longitudinal axis 408 move in oval tubular passage 522.
U-shaped anchor clamps 532 synchronously pivot round the longitudinal axis 530 of metallic rod 524 with metallic rod 524.U-shaped anchor clamps 532 pivoting actions are locked at cutting tool 400 in the cutting tool clamper, perhaps cutting tool 400 are discharged in the cutting tool clamper.
U-shaped anchor clamps 532 itself are used for collaborative first type bindiny mechanism together by engaging with the rib 404 of cutting tool, thus the clamping cutting tool.U-shaped anchor clamps 532 are pivoted to the position that tubular recess 520 exposes.It should be noted that: U-shaped anchor clamps 532 will be positioned at the circular groove 528 of metallic rod 524 towards the position of tubular recess 520, so that the insertion of the link 402 that metallic rod 524 can the overslaugh cutting tool.The link 402 of cutting tool is inserted in the tubular recess 520, engages up to the extension 550 of rib 404 with cutting tool clamper shell 502.Subsequently, U-shaped anchor clamps 532 pivot, and center on the bar handle 400 of the cutting tool of rib 404 belows up to the crotch 540 of U-shaped anchor clamps 532.In this position, prevented the crotch 540 of rib 404 by U-shaped anchor clamps 532.When cutting tool link 402 skidded off tubular recess 520, rib 404 engaged with U-shaped anchor clamps 532, stops it to move to the farther place then.So, when the link 402 of cutting tool is clamped in the tubular recess 520, can be along axially in the limited range of advancing, sliding, moving range is the distance (as shown in Figure 3) that rib 404 can slide between extension 550 and crotch 540.In order to discharge cutting tool, the U-shaped anchor clamps pivot, thereby crotch is removed from the passage of rib 404, break away from tubular recess 520 to allow link 402 fully to slide.
For U-shaped anchor clamps 532 provide one first retaining mechanism, make, when crotch lock onto the cutting tool clamper when inner round bar handle 400 with cutting tool, the U-shaped anchor clamps 532 that comprise crotch 540 are locked in and prevent that cutting tool is unintentionally from position that the cutting tool clamper breaks away from.Being formed on two annulus 534 of U-shaped anchor clamps 532, outer what place is the first plane lock face 552.Be formed on the cutting tool clamper shell 502 for corresponding plane clamping face 554.When crotch 540 when bar handle 400 is held on cutting tool in the cutting tool clamper, plane locking face 552 and plane clamping face 554 are aligned with each other and by rubber ring 546 it is applied bias voltage (metallic rod 524 being applied bias voltage along the direction of arrow M and towards the center of tubular conduit 522) jointly, so that they can abut one another together (referring to Fig. 5 solid line part).When surface 552,554 for the plane and when being applied bias voltage together, can stop annulus 534 to be rotated.For rotating ring 534, the U-shaped anchor clamps that pivot thus, described U-shaped anchor clamps 532 have to move axially (along the direction of arrow M), to allow plane locking face 552 with respect to plane clamping face 554 pivot (shown in Fig. 5 chain-dotted line).The moving axially of U-shaped anchor clamps 532 (arrow M) is that the extruding by the rubber ring 546 in the hole 548 realizes that described hole 548 allows metallic rod 524 to slide in oval-shaped tubular conduit 522.The pivot of U-shaped anchor clamps 532 moves the compression that causes rubber ring 546, thereby the first plane locking face 552 is ridden up on the plane clamping face 554.The biasing force of annulus 546 keeps locking face 552 to press clamping face 554, thereby and pins U-shaped anchor clamps 532 at the locked position place.
Metallic rod 524 itself can be used to collaborative second type of bindiny mechanism together, by engaging the clamping cutting tool with the groove 406 of cutting tool.Metallic rod 524 is pivoted to the position of U-shaped anchor clamps 532 away from the cutting tool location, makes groove 520 be exposed.The exact position of U-shaped anchor clamps 532 is such, that is: the circular groove 528 of metallic rod 524 is towards the inside of tubular recess 520.So, fully enter in the tubular recess 520 without any limiting the link 402 that prevents cutting tool 400 in tubular recess 520 inside.
The link 402 of cutting tool fully inserts in the tubular recess 520.Its groove 406 of having guaranteed cutting tool 400 towards last towards metallic rod 524.Should be noted in the discussion above that cutting tool can not rotate owing to the shape of cross section of bar handle 402 and groove 520 in groove 520.
When the link 402 of cutting tool 400 was inserted in the tubular recess 520 fully, the groove 528 of metallic rod 524 was towards groove 406 inside of cutting tool.
U-shaped anchor clamps 532 pivot subsequently, cause metallic rod 524 to pivot, up to the groove 528 of metallic rod 524 dorsad till the groove 406 of cutting tool.In this, the central part 560 of metallic rod 524 towards and be positioned at the inside of the tubular recess 520 of cutting tool clamper, and therefore towards and be positioned at the inside of the groove 406 of cutting tool 400.This as shown in Figure 2.
In this position, the upper limb 412 of groove 406 and lower edge 414 are prevented from passing the core 560 of metallic rod 524 and advance.When cutting tool link 402 skidded off tubular recess 520, upper limb 412 engaged with the core 560 of metallic rod 524, stops it to move to the farther place then.So, when the link 402 of cutting tool is clamped in the tubular recess 520, can be along axially in the limited range of advancing, sliding, moving range is the distance (as shown in Figure 2) that core 560 can slide between the upper limb 412 of groove 406 and lower edge 414.
In order to discharge cutting tool, the U-shaped anchor clamps pivot, thereby metallic rod 524 is pivoted, and described rotation makes the core 560 of metallic rod 524 shift out from the groove 406 of cutting tool 400, thereby allows the link 402 of cutting tool fully to skid off tubular recess 520.
For U-shaped anchor clamps 532 provide second retaining mechanism, make, the groove 406 that is positioned at cutting tool 400 when the central part 560 of metallic rod 524 is when locking onto the cutting tool clamper with cutting tool 400, and the U-shaped anchor clamps 532 that comprise metallic rod 524 are located in and can prevent that cutting tool breaks away from the position of cutting tool clamper unintentionally.Being formed on two annulus 534 of U-shaped anchor clamps 532, outer what place is the second plane locking face 562.As mentioned above, be formed on the cutting tool clamper shell 502 for plane clamping face 554.Be positioned at the groove 406 of cutting tool 400 when the central part 560 of metallic rod 524, when being clamped in cutting tool in the cutting tool clamper, the second plane locking face 562 and plane clamping face 554 are aligned with each other and applied bias voltage towards each other by rubber ring 546, so that they abut one another together (referring to Fig. 6 solid line part).When being the plane for described, can stop annulus 534 rotations.For rotating ring, pivot thus U-shaped anchor clamps and metallic rod 524, described U-shaped anchor clamps 532 have to move axially (along the direction of arrow M), to allow the second plane locking face 562 with respect to plane clamping face 564 pivot (shown in Fig. 6 chain-dotted line).Moving axially of U-shaped anchor clamps 532 is that extruding by the rubber ring 546 in the hole 548 realizes that described hole 548 allows metallic rod 524 to slide in oval-shaped tubular conduit 522.The pivot of U-shaped anchor clamps 532 moves and causes rubber ring 546 compressions, thereby the second plane locking face 562 is ridden up on the plane clamping face 554.The biasing force of annulus 546 keeps locking face 562 to press against on the clamping face 554, thereby U-shaped anchor clamps 532 are pinned at the locked position place.
Such cutting tool clamper can clamping has any one cutting tool of three types of bindiny mechanisms.
Have in the process of road breaker of such cutting tool clamper in operation, impact the link 402 that piece 564 impacts cutting tool 400 repeatedly.The diameter that impacts the head 566 of piece 564 holds the diameter of tubular recess 520 of the link 402 of cutting tool 400 greater than needs.So, the top 568 of tubular recess 520 has the diameter of increase, and the head 566 that impacts piece 564 is advanced along the length on the top 568 of tubular recess 520.
Impact piece 564 along axle 570 (when the clamping in the cutting tool clamper, the longitudinal axis that is parallel to cutting tool 400) forward, 572 restrictions of the downward crop that moves through the head that impacts piece 564 566 that engages with lower baffle plate 574, described lower baffle plate 574 is formed between the remainder of top 568 parts of tubular recess 520 and tubular recess 520.
Impact piece 564 along axle 570 backward, 576 restrictions of the back porch that moves through the head that impacts piece 564 566 that engages with overhead gage 578 that makes progress, described overhead gage 578 is formed at the side with cutting tool clamper shell 502 rigidly connected beckets 580.
Comprise that the cutting tool clamper of tubular recess 520 head portions 568 and becket 580 and the supporting construction that impacts piece 564 are designed such that: when it is used to clamping when having the cutting tool of first type of bindiny mechanism, rib 404 always can engage with the extension 550 of cutting tool clamper shell 502.When the link 402 of cutting tool 400 was inserted into tubular recess 520, it engaged with the head 566 that impacts piece 564, because gravity former thereby be applied in downward bias voltage, and it is boosted.In the time of in link 402 slips into tubular recess 520, it overcomes the gravity biased that applies and upwards promotes to impact piece.At the back porch 576 of the head 566 that impacts piece 564 with before the overhead gage 578 of the side that is formed at becket 580 engages, the design of supporting construction is set as feasible: rib 404 always engages with the extension 550 of cutting tool clamper shell 502, and wherein said becket 580 is rigidly connected to the top of cutting tool clamper shell 502.
During the operation road breaker, road breaker produces a large amount of vibrations.In order to make road breaker as far as possible to user friendly, hope can reduce the vibratory output that the operator bears as much as possible.Realize that above-mentioned a kind of method is: utilize damper mechanism to offset or subdue the vibration that the operation owing to road breaker causes.EP1252976 discloses the percussion drill with a kind of like this damper mechanism.
EP1252976 has shown a kind of cylinder, piston, plunger of being equipped with, and the percussion drill that impacts piece, wherein said piston can utilize motor back and forth to be driven in cylinder, described plunger is slidably mounted in the cylinder, and back and forth driven via air cushion by piston, the described piece that impacts is impacted repeatedly by plunger, and in turn impacts the end of the cutting cutting tool such as the chisel that is clamped in cutting tool clamper inside.The vibration piece that contends with is used for reducing the vibration of percussion drill inside.Contend with piece round cylinder and be slidingly mounted on the cylinder, and be clamped between two springs, the described spring piece that will contend with is biased into the precalculated position of cylinder.The quality of piece and the intensity of spring of contending with is to be provided with like this, that is: when switching impulse bored, the vibration of contend with piece vibration and piston and plunger was in out of phase, the vibration that produces in the time of can offsetting or subdue the percussion drill operation like this.
Summary of the invention
Therefore, the percussion drill that is provided comprises:
Housing;
Be installed in the cutting tool clamper on the housing, it can the clamping cutting tool;
Be installed in the motor (32) in the housing;
Be installed in the fixedly cylinder (52) in the housing, it has two ends (850,854);
Be slidably mounted in the piston (50) in the cylinder (52);
Driving mechanism, described driving mechanism the rotation of motor (32) output can be converted to piston (50) in cylinder reciprocating motion;
Plunger (54), it is installed in the cylinder (52) slidably, and is positioned at piston (50) the place ahead, and it is back and forth driven by piston (50) through air spring (56);
Be installed in and impact the piece supporting construction in the housing in cylinder (52) the place ahead;
Impact piece (58), it is supported on slidably and impacts piece supporting construction inside, when impacting piece (58) and be clamped in the cutting tool clamper, its plunger (54) that is moved back and forth impacts repeatedly, and impact the end (402) of cutting tool then repeatedly, thereby with the MOMENTUM TRANSMISSION of plunger (54) to cutting tool;
It is characterized in that fixedly cylinder (52) longitudinally is installed in enclosure interior, its installation form is that two end (850,854) surely is clipped between two parts (852,856) of housing (2,502), thereby fixedly cylinder is maintained fixed.
Such structural design provides a stable system, when making cylinder can be installed in the percussion drill and allow that cylinder can relatively narrow or slender along its overall length.
Preferably, in the end (850,854) of cylinder (52) with between the part (852,856) of the housing of this end O shape ring (858) can be arranged.
Description of drawings
Now, will specific embodiments of the invention be described with reference to the accompanying drawings, wherein:
Fig. 1 is the exploded view of the design of prior art cutting tool clamper;
Fig. 2 is the profile of cutting tool clamper shown in Figure 1, and has comprised the vertical cross section of the cutting tool end that is positioned at cutting tool clamper inside;
Fig. 3 has rotated 90 degree for cutting tool clamper shown in Figure 1 vertical cross section together with the cutting tool end that is positioned at cutting tool clamper inside, Fig. 3 position shown in Figure 2 relatively along axis 507;
Fig. 4 is the sectional view of the cutting tool clamper of clamping cutting tool along the direction shown in the arrow B among Fig. 3;
Fig. 5 is provided with the side view of the cutting tool clamper design of U-shaped anchor clamps for prior art, and it is in the first locked position place;
Fig. 6 is provided with the side view of the cutting tool clamper design of U-shaped anchor clamps for prior art, and in this figure, the U-shaped anchor clamps are in the second locked position place;
Fig. 7 is according to the road breaker of the present invention oblique view of (not comprising the U-shaped anchor clamps);
Fig. 8 A is the side view according to road breaker upper end of the present invention (not comprising handle);
Fig. 8 B is according to road breaker lower end side view of the present invention;
Just show a side when Fig. 8 A and 8B combination according to road breaker of the present invention (not comprising handle);
Fig. 9 A is the vertical cross section of the direction of the arrow A shown in road breaker (not comprising handle) upper end edge Fig. 8 A and the 8B;
Fig. 9 B is the vertical cross section of road breaker along the mid portion shown in the direction of the arrow A shown in Fig. 8 A and the 8B;
Fig. 9 C is that road breaker is along the lower end vertical cross section shown in the direction of the arrow A shown in Fig. 8 A and the 8B;
The combination of Fig. 9 A, 9B and 9C shows a vertical cross section according to road breaker of the present invention (not comprising handle);
Figure 10 is according to the piece that impacts of the present invention;
Figure 11 A is side view of Heli-Coil  nut;
Figure 11 B is the vertical view of Heli-Coil  nut;
Figure 11 C is the vertical cross section of the Heli-Coil  nut shown in the direction of arrow B in Figure 11 B;
Figure 11 D is the oblique view of Heli-Coil  itself;
Figure 12 is the oblique view of bent axle, disk and drive pin 40 combinations;
Figure 13 A to 13G demonstrates the oil cap of bent axle;
Figure 13 A is its vertical view;
Figure 13 B is its vertical cross section;
Figure 13 C is its side view;
Figure 13 D is its upward view;
Figure 13 E is Figure 13 C along its axis, revolves to turn 90 degrees the side view shown in the back;
Figure 13 F is an oblique view;
Figure 13 G is Figure 13 F along its axis, has rotated the oblique view behind 90 degree;
Figure 14 A is a side view of the cutting tool clamper of U-shaped anchor clamps when the primary importance place;
Figure 14 B is a side view at the U-shaped anchor clamps two ends of U-shaped anchor clamps when the primary importance place;
Figure 14 C is the feature of the vertical cross section of the zone of the Q among Figure 14 D metallic rod appointment, that be positioned at the oval tubular passage;
Figure 14 D is along the vertical cross section of the cutting tool clamper of arrow C direction among Figure 14 A;
Figure 15 A is a side view of the cutting tool clamper of U-shaped anchor clamps when second place place;
Figure 15 B is a side view at the U-shaped anchor clamps two ends of U-shaped anchor clamps when second place place;
Figure 15 C is the feature of the vertical cross section of the metallic rod appointment of P district, that be positioned at the oval tubular passage among Figure 15 D;
Figure 15 D is along the vertical cross section of the cutting tool clamper of arrow D direction among Figure 15 A;
Figure 15 E is the front view of the direction of the cutting tool clamper that the do not comprise cutting tool arrow E in Figure 15 D;
Figure 16 A is the side view of the cutting tool clamper of U-shaped anchor clamps when the 3rd position;
Figure 16 B is the side view at the U-shaped anchor clamps two ends of U-shaped anchor clamps when the 3rd position;
Figure 16 C is the feature of the vertical cross section of the metallic rod that limit, that be positioned at the oval tubular passage of Zone R among Figure 16 D;
Figure 16 D is along the vertical cross section of the cutting tool clamper of arrow F direction among Figure 16 A;
Figure 17 A is the side view of the cutting tool clamper of U-shaped anchor clamps when the 4th position;
Figure 17 B is the side view at the U-shaped anchor clamps two ends of U-shaped anchor clamps when the 4th position;
Figure 17 C is the feature of the vertical cross section of the metallic rod S area definition, that be positioned at the oval tubular passage among Figure 17 D;
Figure 17 D is along the vertical cross section of the cutting tool clamper of arrow G direction among Figure 17 A;
Figure 18 shows the feature of hit piece supporting construction and cylinder bottom;
Figure 19 A shows the side diagrammatic sketch of the fixedly cylinder of existing design; And
Figure 19 B shows the sectional drawing of the fixedly cylinder of existing design.
The specific embodiment
Though the instrument of the embodiment of this specification can be cutting tool or other cutting element, in specification, all be called cutting tool in order to avoid superfluous.Yet " cutting tool " communicates with " cutting element " in this manual.
In this manual, the technical characterictic in above reaching described instrument of Fig. 1-6 and cutting tool clamper equally also is present in the described road breaker of present embodiment.In the Syria of each embodiment states, also used same Reference numeral, its every conventional design also is incorporated herein automatically and does not go to live in the household of one's in-laws on getting married.Yet, when new technical characterictic of the present invention and above-mentioned technical characterictic similar, but and when inequality, distribute hereinafter and introduced new Reference numeral.So, having outside the explanation with other, new technical characterictic also will have new Reference numeral.
With reference to figure 7, by upper case 2, intermediate case 504, and cutting tool clamper shell 502 is formed cutting tools to the road breaker of the embodiment of the invention as an embodiment of percussion drill
Upper case 2 is by comprising that 8 and two side clam shells 10 of a center clam shell (clamshell) are formed.Each of two side clam shells 10 is utilized a plurality of screws 14 and is connected in each side of center clam shell 8.What be connected with each side clam shell 10 is handle 16, and during operation, the operator supports road breaker by described handle 16.
Intermediate case 504 comprises utilizes a series of bolt 18 to connect or to be connected to the single metal casting of upper case 2, described bolt 18 passes the hole of the flange 20 that is formed at intermediate case 504 upper ends, and threadingly engaging on the mat bolt is formed in the screwed hole in center clam shell 8 lower ends 22 of upper case 2.
Cutting tool clamper shell 502 comprises a single metal casting, and this single metal casting utilizes a series of bolts 24 to be connected on the intermediate case 504.The flange 510 around cutting tool clamper shell 502 upper ends is run through in a plurality of holes 508.Substrate or the base 514 and form of the hole 512 of a plurality of correspondences on the intermediate case 504.Bolt 24 passes the hole 508 on the flange 510 on the cutting tool clamper shell 502, passes the hole 512 of running through intermediate case 504 substrates 514 subsequently again.Self-locking Heli-Coil Nut 30 is screwed into the end with the adjacent bolt 24 of the substrate 514 of intermediate case 504, thereby cutting tool clamper shell 502 is fixed on the intermediate case 504.Rubber seal 82 is set between cutting tool clamper shell 502 and the intermediate case 504.
Now, will a kind of self-locking Heli-Coil with volution inner ring be described with reference to figure 11A to 11D Nut 30.This self-locking nut is with Heli-Coil Be trade mark.Heli-Coil Shown in Figure 11 D.It comprises spiral winding.Described coil comprises epimere 304, intermediate coil 306 and hypomere 308.Epimere 304 and hypomere 308 comprise the spiral coil of following same circular path.Spiral coil extends along its central axis with fixed-circumference.Intermediate coil comprises a series of straightway, and it forms a hexagon path and forms one and have orthohexagonal rigid line figure.Heli-Coil Nut comprises the nut 310 of standard or conventional design, and it has traditional screw channel and runs through itself nut.Heli-Coil Be positioned at the screw thread 312 of nut 310.Described Heli-Coil Spiral winding has the pitch identical with nut thread, and described Heli-Coil The line that is equivalent to the nut thread groove diameter by diameter constitutes.Now, Heli-Coil The screw thread that serves as nut 310.Intermediate coil 306 makes the Heli-CoilU nut have self-locking feature, and when nut was screwed on the bolt, it can be clamped on the bolt and can prevent Heli-Coil by the mat intermediate coil Nut is outwarded winding.The reason that intermediate coil has latching characteristics is: the shape of cross section of bolt shaft is for circular, and the cross section of intermediate coil is a hexagon.Therefore, when the medium line circle is screwed into when spool last, intermediate coil applies a clamping force with grip bolt to the axle of bolt.
Heli-Coil Be extended to effectively and cross in the nut on all screw threads imposing on stress on the nut thread, rather than stress is applied on the screw thread of single part.
With reference to figure 9A, motor (that is motor) 32 is positioned on the upper case, and described motor 32 is driven by the supply of electric power that cable 34 provides, and described cable 34 is connected on the motor 32 via electric switch 33.The pivoting lever 36 that links to each other with switch is positioned on the handle 16.Pressing lower beam 36 can actuating motor (that is motor) 32.
Motor 32 rotates through a plurality of gears and drives bent axle 38.The spline output shaft 100 of motor (that is motor) 32 drives first gear 102 rotatably, and described first gear 102 is installed on the rotatable shaft 104 rigidly.Rotatable shaft 104 is in bearing 116 is rotatably mounted in upper case 2.Second gear 106 also is installed on the rotating shaft 104 rigidly, and be adjacent to first gear 102, thereby make first gear round the rotation of the longitudinal axis 108 of rotatable shaft 104 and and cause that second gear is around the longitudinal axis 108 and with the speed rotation identical with first gear 102.Second gear 106 is meshed with the 3rd gear 110.The 3rd gear is installed on the end of bent axle 38 rigidly.Bent axle 38 is rotatably mounted in the upper case 2 through two groups of bearings 112,114.
Drive pin 40 is installed on the platform 42 with eccentric form, and described platform 42 is rigidly connected to an end of bent axle 38, forms a crank.Figure 12 is the oblique view of this crank.Crank 40,42,38 is with the integrally formed form integral body structure that forms as one.The rotation of bent axle 38 causes the longitudinal axis 44 of drive pin 40 to be rotated round the longitudinal axis 46 of bent axle 38 in known manner.Platform 42 comprises semi-circular portions 314 and jut 316, and drive pin 40 has been installed on jut 316.The quality of semi-circular portions 314 is used for offsetting or subdues when rotating because of crank, is applied to active force on the crank through drive pin 40.
Tubular conduit 300 is extended on the whole length of bent axle 38, passes through the whole length of bent axle 38 to allow air and lubricating grease, thereby makes them easier to be mobile in upper case 2.Similarly, tubular conduit 302 is extended on the whole length of drive pin 40, thereby also allows air and lubricating grease to run through the length of drive pin 40, makes them easier to be mobile in upper case 2.As shown in figure 12, oil-way 318 is formed in the jut 316, and extends to drive pin 40 from the end of jut, and described jut 316 extends radially outwardly from the longitudinal axis 46 of bent axle 38.The function of oil-way 318 will be explained in more detail hereinafter.
With reference to Figure 13 A to 13G, oil cap 320 is clipped in the end of the bent axle 38 shown in Fig. 9 A.The top cover 324 that oil cap 320 comprises tubular body 322 and has a flush end, flush end top cover 324 are connected in an end of tubular body 322.Tubular body 322 has a passage 326 that runs through its length, and its substrate 332 is opened wide.Flush end top cover 324 comprises another tubular conduit 328, and described tubular conduit 328 extends to passage 326 in the tubular body 322 from periphery one side of this end top cover 324.This provides the passage from end top cover 324 edges to the substrate 332 of tubular body 322, thereby allows lubricating oil by oil cap 320.
The tubular body 322 of oil cap is positioned at the tubular conduit 300 of bent axle 38, and end top cover 324 is against the end of bent axle.The direction of oil cap 320 is orientated as and is made tubular conduit 328 point to drive pin 40, also linearly aims at it thereby make tubular conduit 328 point to oil-way 318.Arrow 330 on the top cover act as the direction of pointing out tubular conduit so that assembling.
One reverse bar 48 is through driving bearing 334 and the end at its both ends rotatably is connected on the drive pin 40.Oppositely the other end of bar 48 is connected in piston 50 pivotly, and described piston 50 is slidably mounted in cylinder barrel or the cylinder 52, and cylinder 52 is installed in the intermediate case 504 rigidly.It is reciprocating in cylinder 52 that the rotation of bent axle 38 causes piston 50.
Gear 102,106,110, crank 38,40,42, oppositely bar 48 and rotatablely moving of piston 50 impel lubricating oil to pass through the tubular conduit 300 of bent axle 38 and the tubular conduit of drive pin 40, and this will be explained in more detail hereinafter.
First end 850 of cylinder 52 is firmly being fixed by the parts 852 of the upper case 2 of central clam shell 8.854 at second end of cylinder is firmly fixing by an O type ring 858 by the parts 856 of middle casing 502.Two parts 852,856 of housing 2,502 surely are clipped in the middle cylinder 5, along one long to direction, and will be fixing by the two ends 850,854 of cylinder 52, and it can not be moved.
858 pairs of steady systems of this folder of O shape ring provide the flexibility of a not half to allow that housing 2,502 and cylinder are in the textural production error tolerance that can have to a certain degree.
Plunger 54 is positioned at cylinder 52, and can be free to slide in cylinder 52.Piston ring is round piston 50, to prevent the air process piston 50 in the cylinder.Similarly, piston ring is round plunger 54, thus prevent in the cylinder air through or flow through plunger 54.Therefore, the reciprocating motion of piston 50 reciprocally drives plunger 54 in the cylinder 52 via the air spring 56 between piston 50 and plunger 54.A pore 100 is formed on the wall of cylinder 52.Shown in Fig. 9 B, in case plunger 54 moves apart piston 50 and through air passing hole 100, air just can leave or enter the space in the cylinder 52 between plunger 54 and piston 50.This effectively passivation air spring 56, thereby allow plunger 54 freely to advance and slide subsequently towards impacting piece 58 along cylinder 52.Plunger knocks and impacts piece 58, subsequently towards the piston resilience.When plunger 54 through air passing hole 100, and towards piston 50 shift-ins, then air just can not leave or enter the space in the cylinder 52 between plunger 54 and the piston 50 again.So, air spring 56 is just rebulid, and allows plunger 54 back and forth to be driven by piston 50 through air spring 56.
When plunger 54 was reciprocally driven by piston 50, it also knocked repeatedly and impacts piece 58.Described one on piece 58 mats that impact impact the piece supporting construction and supported, and the described piece supporting construction that impacts is sandwiched between cutting tool clamper shell 502 upper ends and intermediate case 504 lower ends.A recess 60 is formed in the lower end of plunger 54.The top that impacts piece 58 is impacted by the substrate 62 of plunger recess 60.This has reduced the length overall of hit agency, has also maximized the haul distance (being the maximum axial distance that plunger can carry out in cylinder 52) of plunger 54 simultaneously.
Impact the piece supporting construction and comprise a pipe shape metallic supports 64 that is shaped, it has the tubular conduit that runs through itself length and tool homogeneous circular cross-section.The lower end of shaping pipe shape metallic supports 64 is positioned at a circular depressions, and described circular depressions is positioned at the upper end of cutting tool clamper shell 502.A rubber shock absorber 66 is sandwiched between the radially step 68 and intermediate case 504 that radially stretches, and described radially step 68 is formed on the shaping pipe shape metallic support 64.A guide member 70 is sandwiched between cutting tool clamper shell 502 and the shaping pipe shape metallic support 64.
Figure 10 more is shown clearly in, and impacts piece 58 and comprises that 72, one radial protrusion parts 74 of a cylindrical rod handle and one are as the extension 76 as the nose.Radial bars handle 72 is positioned at the tubular conduit inside of shaping pipe shape metallic support 64, and it can slide in tubular conduit along the longitudinal axis 78.Seal 80 is arranged in the tubular conduit wall, and seal engages with the side of the cylindrical rod handle 72 that impacts piece 58, to prevent entering in the intermediate case 504 through shaping pipe shape metallic support 64 such as dust etc.The radial protrusion part 74 that impacts piece 58 has formed crop 88 in its place ahead, has then formed back porch 84 in the wings.
The back back porch 84 that has been subjected to radial protrusion part 74 to (making progress) motion (towards Fig. 9 B and 9C right-hand) that impacts piece 58 limits.Described radial protrusion 74 parts engage with the inclined-plane (angled face) 86 of shaping pipe shape metallic support 64.Forward direction (downwards) motion (towards the left of Fig. 9 B and 9C) that impacts piece 58 has been subjected to crop 88 restrictions of radial protrusion 74, and described radial protrusion 74 inclined-plane 90 interior with being formed at cutting tool clamper shell 502 engages.
Cutting tool clamper shell 502 has constituted the main supporting structure of cutting tool clamper, can the clamping cutting tool in the cutting tool clamper, for example: chisel.When plunger 54 was back and forth driven by piston 50, described plunger 54 impacted the end of the bar handle 72 of piece 58 repeatedly, and the extension 76 of bar handle 72 impacts the cutting tool that is clamped in the cutting tool clamper again repeatedly.
This road breaker comprises vibration-proof structure, and described damper mechanism can be offset or be subdued the vibration that is produced by the operation of road breaker.Damper mechanism comprises the tubulose piece 102 that contends with, and it has circular cross-section and is provided with around cylinder 52.The tubulose piece 102 that contends with is made by magnetic material (or, alternately, permanent magnet can be built in the piece that contends with), hereinafter will be explained in more detail.The tubulose piece 102 that contends with is slidably mounted within on the cylinder 52 via two guide rings 104,106.First lead ring 104 is connected in the lower end that tubulose contends with piece 102 rigidly, and second guide ring 106 is connected in the upper end that tubulose contends with piece 102 rigidly.Two guide rings 104,106 directly are installed on the cylinder, and can slide along the surface of cylinder 52.Tubulose contends with the internal diameter of piece 102 greater than the external diameter of cylinder 52.This causes contending with at tubulose and forms gap 108 between the outside of piece 102 and cylinder 52.Guide ring 104,106 keeps the size of this gap 108, and piece 102 does not contact cylinder 52 to guarantee to contend with.Splash ring is around cylinder 52, and when guide ring 104,106 slides surfacewise, reduced the friction between guide ring 104,106 and cylinder 52 outer surfaces,
The tubulose piece 102 that contends with is biased to center between two helical springs 110,112, and described two helical springs 110,112 are round cylinder 52.First helical spring 110 is sandwiched between the center clam shell 8 of second guide ring 106 and upper case 2, and second helical spring 112 is sandwiched between the recess in first guide ring 104 and the intermediate case 502.
When the operation road breaker, it produces vibration.Described vibration has caused the piece 102 that contends with along cylinder 52 (or ground, front and back) vibration to and fro.The vibration that is arranged so that the piece 102 that contends with of the weight of single spring intensity of two springs 110,112 and active force thereof and the piece 102 that contends with and the vibration of road breaker are outs of phase, the motion that is caused has reduced the vibratory output that the road breaker main body stands, thereby produces effectiveness in vibration suppression.
Now, will the lubricating system of road breaker be described.
In order to operate road breaker effectively, its inner member must utilize lubricating oil to be lubricated, and described lubricating oil can be around the component parts of road breaker, portion freely flows within it, thereby reduces friction, grinds and break.One of problem of road breaker is to guarantee the dispersion of lubricating oil in described component parts.This road breaker utilizes the motion of its component parts, and lubricating oil is distributed to needed zone.
When road breaker was operated, motor 32 was through gear 102,106, and 110 rotations drive bent axles 38, and described gear is with known method driven plunger 50 reciprocally.When piston 50 moved back and forth in cylinder 52, the size in the gap 336 at piston 50 rears fluctuateed continuously.Along with the variation of volume, the air capacity in the gap 336 piston rear, that be arranged in cylinder 52 also takes place to change continuously.Therefore, when the volume in gap 336 increased, air was extracted the top of the cylinder 52 that enters piston 50 back from upper case 2; When the volume in gap 336 reduced, air was ejected in the upper case 2 from the top of cylinder 52.This has caused that a large amount of air movements is arranged in upper case 2.
In addition, when operation during road breaker, the tubulose piece 102 that contends with slides in the mode of vibration along cylinder 52 outsides, carries out vibration-damping function.
Lubricating oil is coated on the internals of road breaker, described internals comprise bent axle 38, drive pin 40, oppositely rear portion, the cylinder 52 of bar 48, piston 50 the outside, piece 102 and spring 110,112 contend with.When air is sucked and is discharged the gap 336 of the cylinder 52 that is positioned at piston 50 back repeatedly, because the reciprocating motion of piston 50 in cylinder 52, make a large amount of air in upper case 2, move, this causes air and is entrained in airborne oil, the general form that forms spraying, tubular conduit 300 by bent axle 38 moves along alternating direction.The generation of mist of oil is by crank 38,40,42, oppositely the motion of bar 48, gear 102,106,110 and piston 50 causes.When the reciprocating motion owing to piston 50 caused the fluctuation of air, the tubular conduit 300 in the bent axle 38 was more prone to the interior air of upper case and the motion of lubricating oil.
A critical elements need lubricating is the driving bearing 334 between reverse bar 48 and drive pin 40.Driving bearing 334 required lubricated arrangements by oil cap 320 and oil-way 318 provide.
Be drawn out of the tubular conduit 300 of bent axle 38 when air and its lubricating oil of carrying secretly, and when the gap 336 of piston 50 back enters (because air is inhaled in the gap 336 in the cylinder 52 behind the piston 50), air and its oil of carrying secretly enter in the zone 338 that is adjacent to reverse bar 48 by oil cap 320 from the tubular conduit 300 of bent axle 38.In order to pass through oil cap 320, it must pass through the tubular conduit 328 of the end top cover 324 of oil cap 320.When bent axle 38 rotation, oil cap 320 and the end top cover 324 that is provided with tubular conduit 328 also are rotated.Therefore, the lubricating oil of carrying secretly is because action of centrifugal force, and radially outward discharges from tubular conduit along the longitudinal axis 46 of bent axle 38.Because tubular conduit 328 driven in registry pins 40, so its aims at and is straight line with oil-way 318 and distribute, radially the lubricating oil of Pai Chuing by directly towards and enter in the oil-way 318.Because action of centrifugal force, lubricating oil flows out continuously along oil-way 318 subsequently, and till the substrate generation of itself and drive pin 40 contacted, described substrate engaged with driving bearing 334.Therefore, can guarantee that driving bearing 334 obtains constant lubricating.
When oil that air and its are carried this secretly is pushed in the tubular conduit 300 of bent axle 38 from the gap at piston 50 rears, (at this moment owing to discharge the gap 336 of air in the cylinder 52 at piston 50 rears), air and its oil of carrying secretly enter the tubular conduit 300 of bent axle by oil cap 320 in the zone 338 that is adjacent to reverse bar 48.Yet, because the rotation of bent axle 38 causes centrifugal action on lubricating oil, therefore be contained in lubricating oil in the oil-way 318 and can not be pumped to position away from drive pin 40.
The oscillating movement of piece 102 of contending with has also caused in a space or the air movement of 340 inside, gap, the cylinder 52 of described gap 340 in the intermediate case 502.In addition, the contend with oscillating movement of piece 102 makes oil become spraying.Air movement makes the lubricant mist that is produced circulate in gap 340, and described gap 340 is positioned at intermediate case 502, and described intermediate case 502 is around cylinder 52.
Need another lubricated important area below the plunger 54 but impacting lower cylinder space 342 above the piece supporting construction.In order to realize lubricating, there is a bending channel path 344 to be formed in the substrate of intermediate case 504, described bending channel path 344 guides air and its lubricating oil of carrying this secretly to enter in the lower cylinder space 342.When contending with piece 102 when the cutting tool clamper moves down, it promotes air and the lubricating oil carried secretly enters in the bending channel 344, and described bending channel 344 is because its shape, guides air and the lubricating oil carried secretly enters in the lower cylinder space 342.When the piece 102 that contends with moves up away from the cutting tool clamper, the lubricating oil that it deflates and carrying secretly in the lower cylinder space 342 by bending channel 344.The motion that air and the lubricating oil of carrying secretly entered and discharged lower cylinder space 342 also be subjected to plunger 54 in cylinder 52 increase and the motion that reduces lower cylinder space 342 assist, the fluctuation of motion build-up of pressure, thus produce air movement.The motion 54 of plunger is different with the motion phase of the piece 102 that contends with, thereby even become anti-phase relation to make to enter and discharge in the motion in lower cylinder gap 342 at air and the lubricating oil carried secretly, they can cooperate mutually in mat motion separately.
A plurality of passage (not shown)s be formed in intermediate case 504 around the gap 340 of cylinder 52 with in abutting connection with between the zone 338 of reverse bar 48, be used for setting up air between the two and the path of the lubricating oil carried secretly.
It should be noted that the motion of piston 50 and plunger 54, via air cushion spring or air spring 56, is synchronous, but need not on phase place synchronous.The motion of piece 102 and plunger 54 and piston 50 also are synchronous and s contends with, but the two also need not homophase each other.So, in road breaker inside, there is the motion of pair air and any lubricating oil of carrying secretly to carry out comprehensively unified the coordination.
Gear 102,106,110 has other thick grease as lubricant, and described thick grease can add in the maintenance period, or is added on the element when assembling.Thick grease is viscosity, and its high slumpability makes it to be difficult for being moved because of the airwaves in the road breaker.Yet, as time goes by and lubricating oil in road breaker, circulate, lubricating oil and thick grease will mix.
When using road breaker, component parts inevitably weares and teares and causes the generation of metal fragment.These fragments can be transmitted around road breaker inside by the motion of air and the lubricating oil of carrying secretly thereof.This may cause bigger infringement.Utilize magnetic material to make to contend with piece 102, when metal fragment when contending with piece 102 because the effect of magnetic force, their pieces 102 that will be contended with attract, and are attached on the piece 102 that contends with.So, metal fragment is hunted down, thereby stops them to cause any infringement.For reaching this purpose, contending with fast 102 can also comprise a permanent-magnet pieces, for example permanent magnet.
Now the cutting tool clamper will be described.
Cutting tool clamper 94 is similar to the example aforesaid of the prior art referring to figs. 1 to 6.Wherein the cutting tool clamper with the described prior art of Fig. 1 to 6 is identical, and identical feature also is present among the embodiment of this cutting tool clamper, and has been incorporated herein and has used identical Reference numeral.
Should be noted in the discussion above that for clarity sake at Figure 14 A to 14D, 15A to 15E among 16A to 16D and the 17A to 17D, impacts the piece supporting construction and is omitted together with impacting piece.
Figure 14 A to 14D and Figure 15 A to 15E only shown when the cutting tool clamper be used for clamping such as: U-shaped anchor clamps 532 engage the cutting tool clamper of cutting tool cutting tool rib 404, that have first type of bindiny mechanism.Utilize described mechanism, cutting tool is fixed in the cutting tool clamper, this mechanism is the same referring to figs. 1 to 6 described prior aries together.
Figure 14 A to 14D has shown the cutting tool clamper of the link 402 that is held on the cutting tool in the cutting tool clamper.Crotch 540 is round the bar handle 400 of cutting tool, and the link 402 that is positioned to stop cutting tool slides out from the recess 520 of cutting tool clamper, and this utilizes crotch 540 to realize to prevent that rib 404 from slipping over from crotch 540.The angle position mat of U-shaped anchor clamps 532 engages by flat locking face 552 and plane maintenance face 554 and keeps.In order to discharge chisel from the cutting tool clamper, U-shaped anchor clamps 532 pivot round the longitudinal axis 530 of metallic rod 524.When U-shaped anchor clamps 532 pivoted, flat locking face 552 kept face 554 to break away from the mode identical with above-mentioned prior art from the plane.
In the cutting tool clamper of prior art, in case flat locking face keeps face 554 to break away from from the plane, then U-shaped anchor clamps 532 can pivot freely.This has caused the generation of problem, that is: when U-shaped anchor clamps 532 can move freely, the operator can remove cutting tool from the cutting tool clamper, also cutting tool can be inserted in the cutting tool clamper.
In cutting tool clamper embodiment of the present invention, two annulus 534 of U-shaped anchor clamps 532 comprise storage surface 350.In order to remove or cutting tool to be inserted in the cutting tool clamper, U-shaped anchor clamps 532 are pivoted to the released position, shown in Figure 15 A to 15E, are the position of crotch 540 away from the rib on the cutting tool 404 herein.Storage surface 350 keeps face 554 to engage with the plane of cutting tool clamper, is used for U-shaped anchor clamps 532 are locked at the place, released position, shown in Figure 15 A to 15E.This has prevented the generation of problem, that is: when U-shaped anchor clamps 532 pivoted, the operator removed cutting tool from the cutting tool clamper, also cutting tool can be inserted in the cutting tool clamper.In case the insertion cutting tool, then U-shaped anchor clamps 532 can pivot and turn back to its locked position, and in described position, flat locking face 552 keeps face 554 to engage with the plane.
Utilize described mechanism, storage surface 350 is engaged and break away from the plane and keep face, thereby keep U-shaped anchor clamps 532 fixing, thus described mechanism and first locking face 552 and plane keep face 554 engage maintenance U-shaped anchor clamps 532 fix by mechanism be identical.
Should be noted that: when U-shaped anchor clamps 532 were in locked position (referring to Figure 14 D) or are in released position (referring to Figure 15 D), metallic rod 524 can not interfere with the link 402 (referring to Figure 14 C and 15C) of cutting tool.
Figure 16 A to 16D and Figure 17 A to 17D have shown when being used for clamping such as cutting tool clamper when utilizing metallic rod 524 to engage cutting tool cutting tool recess 406, that have second type of bindiny mechanism.Should be noted in the discussion above that accompanying drawing has shown that there is the cutting tool of recess 406 again in existing rib 404.When utilizing metallic rod 524, rib 404 cuts little ice when cutting tool is fixed to the cutting tool clamper.Utilize described mechanism, cutting tool is fixed in the cutting tool clamper, and described mechanism is the same with the described prior art of Fig. 1 to 6.
Figure 16 A to 16D has shown the cutting tool clamper of the link 402 of the cutting tool in the clamping cutting tool clamper.Metallic rod 524 is positioned at the recess 406 of cutting tool, and the link 402 that is positioned to stop cutting tool skids off from the recess 520 of cutting tool clamper, and this is to utilize metallic rod 524 to prevent that the edge 412,414 of recess 406 from slipping over realization from metallic rod 524.The angle position of U-shaped anchor clamps 532 keeps face 554 to engage by the second flat locking face 562 and plane and keeps.In order to discharge chisel from the cutting tool clamper, U-shaped anchor clamps 532 pivot round the longitudinal axis 530 of metallic rod 524.When U-shaped anchor clamps 532 pivoted, the second flat locking face 562 kept face 554 to break away from from the plane.
In the cutting tool clamper of prior art, in case when the second flat locking face 562 kept face 554 to break away from from the plane, U-shaped anchor clamps 532 can freely pivot.This has caused the generation of problem, that is: when U-shaped anchor clamps 532 moved, the operator can remove cutting tool from the cutting tool clamper, also cutting tool can be inserted in the cutting tool clamper.
In cutting tool clamper embodiment of the present invention, two annulus 534 of U-shaped anchor clamps 532 comprise additional storage face 352.In order to remove cutting tool or cutting tool to be inserted in the cutting tool clamper, U-shaped anchor clamps 532 are pivoted to a position, and shown in Figure 17 A to 17D, this position is that the circular groove 528 of metallic rod 524 is facing to the position that is positioned at the recess 406 on the chisel.Auxiliary storage face 352 keeps face 554 to engage with the plane of cutting tool clamper, U-shaped anchor clamps 532 are locked at the place, released position, shown in Figure 17 A to 17D.This has prevented the generation of problem, that is: when U-shaped anchor clamps 532 pivoted, the operator can remove cutting tool from the cutting tool clamper, also cutting tool can be inserted in the cutting tool clamper.In case inserted cutting tool, then U-shaped anchor clamps 532 just can pivot and turn back to its locked position, and in described position, the second flat locking face 562 keeps face 554 to engage with the plane.
Utilize described mechanism, auxiliary storage face 352 just can keep face 554 to engage and disengaging in the plane, thereby keep the fixing of metallic rod 352, described mechanism keeps face 554 to engage with second locking face 562 and plane, thus maintenance U-shaped anchor clamps 532 fix by mechanism be identical.
It should be noted that: when U-shaped anchor clamps 532 were positioned at position shown in Figure 14 A to 14D and Figure 15 A to 15E, metallic rod 524 can not disturbed the insertion of cutting tool link 402.Yet when the cutting tool with second type of bindiny mechanism was held by the cutting tool clamper that adopts metallic rod 524, these positions can't be used.This is to be in wrong side (shown in Figure 16 A to 16D) with respect to the released position of locked position because U-shaped anchor clamps 532 are positioned at cutting tool.When the crotch 540 of U-shaped anchor clamps 532 can not pass through the bar handle 400 of cutting tool, will stop it to be pivoted to the position shown in Figure 16 A to 16D.
Now, description is impacted the wearing and tearing indication of the extension 76 of piece 58.
In the process of operation road breaker, the extension 76 that impacts piece 58 impacts the link 402 of cutting tool 400 repeatedly.Bearing and wearing and tearing, and the extension 76 that impacts piece especially easily is worn.When impacting piece and be worn, its length will shorten.Therefore, what extension 76 with growth was provided impacts piece 58, is used for bearing the wearing and tearing that extension 76 is born.Yet, the more important thing is, can inform when sufficient or certain wearing and tearing take place for extension 76.
When not using road breaker, impact piece 58 and can be in impacting the piece supporting construction freely slide, its motion is subjected to the restriction of the back porch 84 of radial protrusion 74, and described radial protrusion 74 engages with the inclined-plane 86 at rear, and 88 of crops engage with inclined-plane, the place ahead 90.
When cutting tool slips in the tubulose recess 520 of cutting tool clamper, the end of the link 402 of cutting tool will engage with the extension 76 that impacts piece 58.When link further was inserted in the tubulose recess 520, its promoted to impact piece 58 (towards Fig. 9 C right-hand) backward, up to the back porch 84 of the radial protrusion 74 that impacts piece 58 with till the inclined-plane, rear 86 that impacts the piece supporting construction engages.At this some place, impact piece 58 and be prevented from being moved further along direction backward.This has prevented that again link 402 further is inserted in the tubulose recess 520 of cutting tool clamper.
Cutting tool with first kind of bindiny mechanism comprises rib 404.Distance between the end of the link 402 of rib 404 and cutting tool is predetermined gauged distance.The cutting tool clamper, impact piece 58 (wearing and tearing), the size that impacts the piece supporting construction is configured to, so that when link 402 promotes to impact piece 58 backward, when the back porch 84 of the radial protrusion 74 that impacts piece 58 engages with the inclined-plane, rear 86 that impacts the piece supporting construction, between the extension 550 of rib 404 and cutting tool clamper shell, there is small distance 360 (referring to Fig. 9 C).When prevention impacted piece 58 and is moved further, cutting tool can't insert in the cutting tool clamper further, and rib 404 can not move closer in the extension 550 of cutting tool clamper shell like this.
Because the length that impacts the extension 76 of piece is worn, therefore when utilize cutting tool, when promotion impacts piece 58 backward in the above described manner, the distance between the extension 550 of rib 404 and cutting tool clamper shell reduces.Small distance (360) (impacting of unworn extension 76 produced when piece is positioned at road breaker when having) is less than the length of the unworn extension 76 that impacts piece 58.Owing to used the extension 76 that impacts piece 58, in a single day the extension 76 that therefore impacts piece 58 is is fully worn and torn, and then its length will reduce, to such an extent as to the rib 404 of cutting tool engages with the extension 550 of cutting tool clamper shell.This sends to the operator and impacts the indication that piece 58 is is fully worn and torn and need change.This provides wearing and tearing indications for impacting piece 58, described impact that piece 58 is positioned at road breaker impact piece supporting construction inside, and impacted the piece supporting construction and centered on, so not accessible inspection.

Claims (2)

1, a kind of percussion drill comprises:
Housing;
Be installed in the fixedly cylinder (52) in the housing, it has two ends (850,854);
Be slidably mounted in the piston (50) in the cylinder (52);
Plunger (54), it is installed in the cylinder (52) slidably, and is positioned at piston (50) the place ahead, and it is back and forth driven by piston (50) through air spring (56);
Impact piece (58), it is supported on slidably and impacts piece supporting construction inside, when impacting piece (58) and be clamped in the cutting tool clamper, its plunger (54) that is moved back and forth impacts repeatedly, and impact the end (402) of cutting tool then repeatedly, thereby with the MOMENTUM TRANSMISSION of plunger (54) to cutting tool;
It is characterized in that fixedly cylinder (52) longitudinally is installed in enclosure interior, its installation form is that two end (850,854) surely is clipped between two parts (852,856) of housing (2,502), thereby fixedly cylinder is maintained fixed.
2, percussion drill as claimed in claim 1 wherein, is provided with O shape ring (858) in the end (850,854) of cylinder (52) with between the part (852,856) of the housing of this end.
CNA2007101279426A 2006-07-01 2007-06-27 A hammer drill and the cylinder support structure thereof Pending CN101096088A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB0613181A GB0613181D0 (en) 2006-07-01 2006-07-01 Pavement breaker
GB0613181.7 2006-07-05
GB0613328.4 2006-07-05
GB0620667.6 2006-10-18
GB0624346.3 2006-12-06

Publications (1)

Publication Number Publication Date
CN101096088A true CN101096088A (en) 2008-01-02

Family

ID=36888534

Family Applications (9)

Application Number Title Priority Date Filing Date
CNA2007101096800A Pending CN101096093A (en) 2006-07-01 2007-06-27 Hammer drill and a lubricant system for the hammer drill
CNA2007101096815A Pending CN101096086A (en) 2006-07-01 2007-06-27 A hammer drill and method for indicating the beat piece wear
CNA200710109682XA Pending CN101096092A (en) 2006-07-01 2007-06-27 Hammer drill
CNA2007101096868A Pending CN101096090A (en) 2006-07-01 2007-06-27 Hammer drill
CNA2007101096779A Pending CN101096091A (en) 2006-07-01 2007-06-27 Hammer drill
CNA2007101279426A Pending CN101096088A (en) 2006-07-01 2007-06-27 A hammer drill and the cylinder support structure thereof
CNA2007101096853A Pending CN101096089A (en) 2006-07-01 2007-06-27 A tool holder for a pavement breaker
CNA2007101096834A Pending CN101096094A (en) 2006-07-01 2007-06-27 A lubricant system for the hammer drill
CNA2007101096904A Pending CN101096087A (en) 2006-07-01 2007-06-27 A hammer drill and supporting structure of the beat piece

Family Applications Before (5)

Application Number Title Priority Date Filing Date
CNA2007101096800A Pending CN101096093A (en) 2006-07-01 2007-06-27 Hammer drill and a lubricant system for the hammer drill
CNA2007101096815A Pending CN101096086A (en) 2006-07-01 2007-06-27 A hammer drill and method for indicating the beat piece wear
CNA200710109682XA Pending CN101096092A (en) 2006-07-01 2007-06-27 Hammer drill
CNA2007101096868A Pending CN101096090A (en) 2006-07-01 2007-06-27 Hammer drill
CNA2007101096779A Pending CN101096091A (en) 2006-07-01 2007-06-27 Hammer drill

Family Applications After (3)

Application Number Title Priority Date Filing Date
CNA2007101096853A Pending CN101096089A (en) 2006-07-01 2007-06-27 A tool holder for a pavement breaker
CNA2007101096834A Pending CN101096094A (en) 2006-07-01 2007-06-27 A lubricant system for the hammer drill
CNA2007101096904A Pending CN101096087A (en) 2006-07-01 2007-06-27 A hammer drill and supporting structure of the beat piece

Country Status (2)

Country Link
CN (9) CN101096093A (en)
GB (1) GB0613181D0 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN103260829A (en) * 2010-12-21 2013-08-21 罗伯特·博世有限公司 Portable power tool

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DE102011078628A1 (en) * 2011-07-05 2013-01-10 Robert Bosch Gmbh chlagwerkvorrichtung
CN102699376B (en) * 2012-06-11 2014-02-19 西安理工大学 Vibration generator for vibrating deep-hole drilling and boring equipment
DE102012212231A1 (en) 2012-07-12 2014-01-16 Hilti Aktiengesellschaft Hand tool
CN104139378B (en) * 2013-05-10 2017-05-03 苏州宝时得电动工具有限公司 Clamping device and power tool
JP6125392B2 (en) * 2013-09-27 2017-05-10 株式会社マキタ Impact tool
CN105648887B (en) * 2016-01-22 2017-07-11 张汉中 A kind of road upkeep work car
DE102017201558A1 (en) * 2017-01-31 2018-08-02 Robert Bosch Gmbh Accessory device for a hand tool
CN109505221B (en) * 2018-12-17 2020-11-03 广东博智林机器人有限公司 Building concrete hits garrulous robot fast
CN113226608B (en) * 2018-12-28 2024-08-13 工机控股株式会社 Working machine
EP3766639A1 (en) * 2019-07-18 2021-01-20 Hilti Aktiengesellschaft Handheld machine tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103260829A (en) * 2010-12-21 2013-08-21 罗伯特·博世有限公司 Portable power tool

Also Published As

Publication number Publication date
GB0613181D0 (en) 2006-08-09
CN101096086A (en) 2008-01-02
CN101096092A (en) 2008-01-02
CN101096094A (en) 2008-01-02
CN101096090A (en) 2008-01-02
CN101096087A (en) 2008-01-02
CN101096093A (en) 2008-01-02
CN101096091A (en) 2008-01-02
CN101096089A (en) 2008-01-02

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