CN104275685B - Cutter holding device and the hand held electric tool for including this cutter holding device - Google Patents
Cutter holding device and the hand held electric tool for including this cutter holding device Download PDFInfo
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- CN104275685B CN104275685B CN201310279617.7A CN201310279617A CN104275685B CN 104275685 B CN104275685 B CN 104275685B CN 201310279617 A CN201310279617 A CN 201310279617A CN 104275685 B CN104275685 B CN 104275685B
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- hollow cylinder
- cylindrical type
- type hollow
- electric tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
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- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Drilling And Boring (AREA)
Abstract
The present invention relates to provide a kind of cutter holding device for hand held electric tool, it includes the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder, one part in the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder can be slidably insert into another, the space of a part for the cutter of the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder restriction for accommodating the hand held electric tool.The invention further relates to the hand held electric tools for including this cutter holding device.According to the present invention, empty hammer phenomenon will not occur being used even if in hand held electric tool when the cutter of the clamping part with the clamping minister than standard cutter in the unloaded state, so as to slow down the abrasion of cutter, and extend the service life of hand held electric tool.
Description
Technical field
The present invention relates to electric tool more particularly to a kind of cutter holding device and including this cutter holding device
Hand held electric tool.
Background technology
The hand held electric tool of electric pick or electric hammer etc. generates cyclically-varying using the piston of axially reciprocating
Air pressure, to drive jump bit and impact bolt to hit the clamping part of cutter, to which impact force is transmitted on cutter, with
The operations such as just dug, bored in the stiff materials such as building walls or floor.
EP2239100A2 discloses a kind of hand held electric tool, it includes being arranged in hand held electric tool main casing
In carry gas vent tube-like piece.At one end, the piston of axially reciprocating is housed in tube-like piece；In the other end, tube-like piece
Equipped with the jump bit and impact bolt for being axially reciprocal movement.Gas vent on tube-like piece is between piston and jump bit.Tubulose
Equipped with the sleeve that can be slid on the outside of part.Sleeve close to the side of jump bit there is the kidney slot on tube-like piece to prolong
Reach the drive pin in tube-like piece.Tube-like piece is in the end far from piston equipped with the cutter holding device for cutter to be clamped.When
Hand held electric tool contacted with Seeding location in load condition when, cutter moves in the axial direction, push impact bolt also along
Axial movement.At this point, impacting bolt and driving pin contacts and sleeve is pushed to move, to make the exhaust on sleeve closed tube part
Hole, to form airtight space between jump bit and piston in tube-like piece.Thus, it can be passed to cutter by the airtight space
Pass impact force.Under the light condition that hand held electric tool and Seeding location are detached from, sleeve moves under the action of resetting spring
From the position that tube-like piece is equipped with gas vent, gas vent is made to be communicated with external environment so that airtight space disappearance, thus no longer to
Cutter transmits impact force.
In above-mentioned existing hand held electric tool, cutter holding device is integral structure, the length in its axial direction
It can not change.As clamping minister of the clamping part for the cutter that hand held electric tool uses than the cutter of standard, in hand-held
Under the light condition that electric tool and Seeding location are detached from, there is no enough gaps, very between the clamping part and impact bolt of cutter
To there may be an interference distances.Due to not enough gaps or there are interference distance, sleeve cannot be in resetting spring
Position or even jump bit of the tube-like piece equipped with gas vent are moved away under effect can not be moved away from the position that tube-like piece is equipped with gas vent.
Thus, even if there is airtight space if in the unloaded state in tube-like piece between jump bit and piston always.As a result,
Under light condition, impact force is transmitted to cutter still through the airtight space, this phenomenon is referred to as " sky hammer ".Sky hammer is not only
The abrasion of cutter is accelerated, and shortens the service life of hand held electric tool.
It is then desired to be especially improved to its cutter holding device to existing hand held electric tool, to carry
Its high compatibility to cutter.
Invention content
Present invention aim to overcome above-mentioned at least one defect in the prior art, a kind of cutter holding dress is proposed
It sets, this cutter holding device has improved compatibility, even if having the clamping of the clamping minister than standard cutter in clamping
It can prevent occurring empty hammer phenomenon in the unloaded state when the cutter in portion, to slow down the abrasion of cutter, and extend hand-held
The service life of electric tool.
For this purpose, according to an aspect of the present invention, a kind of cutter holding device for hand held electric tool is provided, including：
First cylindrical type hollow cylinder；
Second cylindrical type hollow cylinder；
Wherein, one a part of energy in the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder
It is enough slidably insert into another, the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder are limited and used
In the space of a part for the cutter for accommodating the hand held electric tool.
Preferably, one in the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder can be continuously
Gap is slidably inserted into another.
Preferably, the cutter holding device further includes at least one connecting pin, the first cylindrical type hollow cylinder and
It is provided with the connecting hole for partly accommodating the connecting pin on one in the second cylindrical type hollow cylinder, described
It is correspondingly provided on another in one cylindrical type hollow cylinder and the second cylindrical type hollow cylinder axially extending thin
Elongated slot, the connecting pin accommodated in the connecting hole are partly extended in the elongated slot so that first cylinder
Type hollow cylinder and the second cylindrical type hollow cylinder can be under the guiding of the connecting pin and the elongated slot relative to each other
Axially slide.
Preferably, the length of the elongated slot is chosen to be under load condition when the hand held electric tool, described
End of the connecting pin not with the elongated slot is in direct contact.Preferably, the cutter holding device further includes for by the company
Outbound keeps retaining ring in the connecting hole.
Preferably, the cutter holding device further includes the snap ring being arranged in the connecting hole both sides, is used for the guarantor
Held in ring is securely maintained at position.
Preferably, the first end of the first cylindrical type hollow cylinder can gapless be slidably inserted into second cylinder
In the opposite first end of type hollow cylinder, the connecting hole for partly accommodating the connecting pin is arranged in second circle
On column type hollow cylinder, the axially extending elongated slot is arranged on the first cylindrical type hollow cylinder.
Preferably, the cutter holding device further includes for the holding by connecting pin holding in the connecting hole
Ring.
Preferably, the cutter holding device further includes being arranged on the second cylindrical type hollow cylinder to be located at the company
The circumferential recess of hole both sides is connect, the circumferential recess is respectively used to place the snap ring that the retaining ring is securely maintained to position.
Preferably, the elongated slot does not penetrate the inner wall of the first cylindrical type hollow cylinder.
Preferably, the logical of the inner wall for penetrating the first cylindrical type hollow cylinder is provided on the bottom wall of the elongated slot
Hole.
Preferably, it is also formed on the first cylindrical type hollow cylinder for partly accommodating the folder for clamp-on tool
The through-hole of tight element and the circumferential recess for placing snap ring, the snap ring is for making the clamping element being maintained at institute
The retaining ring stated in through-hole is fixed in place.
Preferably, the end cap for placing hand held electric tool is also formed on the first cylindrical type hollow cylinder
Circumferential recess.
Preferably, it is also formed on the second cylindrical type hollow cylinder for consolidating the second cylindrical type hollow cylinder
Determine to the mounting hole and circumferential recess on the tube-like piece of the hand held electric tool.
Preferably, the internal diameter of the various pieces of the first cylindrical type hollow cylinder and the second cylindrical type hollow cylinder
It is selected to be suitable for holding cutter.
Preferably, the hand held electric tool is electric hammer or electric pick.
According to a further aspect of the invention, a kind of hand held electric tool is provided, the hand held electric tool includes as above
The cutter holding device.
Preferably, the second end of the second cylindrical type hollow cylinder is inserted into the tube-like piece of the hand held electric tool
In, fixed pin passes through the through-hole on the tube-like piece to extend in the mounting hole on the second cylindrical type hollow cylinder, retaining ring quilt
It is arranged on the outside of the tube-like piece and for the fixed pin to be held in place, snap ring is placed in second cylindrical type
In the circumferential recess on empty cylinder, the retaining ring is held in place on the tube-like piece.
Preferably, the outer wall of the tube-like piece is circumferentially provided with stepped part, and the inner wall of the retaining ring is circumferentially
It is provided with the stepped part to match with the stepped part.
Preferably, it is provided between the procapsid of the hand held electric tool and the first cylindrical type hollow cylinder
Retaining ring for being maintained at clamping element in the through-hole on the first cylindrical type hollow cylinder, and in first circle
It is laid in circumferential recess on column type hollow cylinder for the retaining ring to be fixed to snap ring in place, to make the front housing
Body and the first cylindrical type hollow cylinder are held fixedly together.
Preferably, the end cap of the hand held electric tool is snapped onto by its week inward flange in first cylindrical type
It is fixedly held on the first cylindrical type hollow cylinder in circumferential recess on empty cylinder.
According to the present invention, since cutter holding device is made of two parts that can be slid relative to each other, cutter holding
The axial length of device can be adjusted.Even if using the clamping with the clamping minister than standard cutter in hand held electric tool
Will not occur empty hammer phenomenon when the cutter in portion in the unloaded state, so as to slow down the abrasion of cutter, and extend hand-held
The service life of formula electric tool.
Description of the drawings
Fig. 1 is the exploded perspective view of cutter holding device according to the preferred embodiment of the invention；
Fig. 2 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool is using standard cutter and under load condition；
Fig. 3 is the view similar with Fig. 2, but along different taken in section to show hand held electric tool in more detail
Structure；
Fig. 4 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool is using standard cutter and under light condition；
Fig. 5 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool uses the cutter of the clamping part with the clamping minister than standard cutter and is in light condition
Under；
Fig. 6 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool uses the cutter of the clamping part with the clamping minister than standard cutter and is in load condition
Under；And
Fig. 7 is the close-up schematic view of Fig. 3, it is shown that the second cylindrical type hollow cylinder of cutter holding device of the present invention
Connection between the tube-like piece of hand held electric tool.
Specific implementation mode
The present invention is described in detail below by exemplary embodiment.It is noted that it will be understood by those skilled in the art that
It is that following embodiment only provides the exemplary implementation of the cutter holding device about the present invention by way of example for simplicity
Example is not meant to carry out any restrictions to the present invention.
As shown in Figure 1, cutter holding device 1 according to the preferred embodiment of the invention includes the first cylindrical type hollow cylinder 3
With the second cylindrical type hollow cylinder 5.The outer diameter of the first end 3a of first cylindrical type hollow cylinder 3 is selected to be equal to or less than the
The internal diameter of the opposite first end 5a of two cylindrical type hollow cylinders 5 so that the first end 3a of the first cylindrical type hollow cylinder 3 can be inserted
In the opposite first end 5a for entering the second cylindrical type hollow cylinder 5.Preferably, the first end 3a of the first cylindrical type hollow cylinder 3
Outer diameter is selected to the internal diameter of the opposite first end 5a of substantially equivalent to the second cylindrical type hollow cylinder 5 so that in the first cylindrical type
The first end 3a of empty cylinder 3 can be slidably inserted into gapless in the opposite first end 5a of the second cylindrical type hollow cylinder 5.First
The first end 3a of cylindrical type hollow cylinder 3 is axially formed at least one elongated slot 3b, has three in a preferred embodiment
It elongated slot 3b and is uniformly distributed along the circumferential direction of the first cylindrical type hollow cylinder 3.Second cylindrical type hollow cylinder 5 it is opposite
Connecting hole 5b is accordingly formed on first end 5a.Second cylindrical type hollow cylinder 5, which is also formed with, is located at connecting hole 5b two
The circumferential recess 5c of side.
In assembling, as shown in Figures 2 and 3, the first end 3a of the first cylindrical type hollow cylinder 3 is inserted into the second cylindrical type
In the opposite first end 5a of empty cylinder 5, with sizable 7 quilts of connecting pin of connecting hole 5b on the second cylindrical type hollow cylinder 5
It is placed in connecting hole 5b and is partly extended in the elongated slot 3b on the first cylindrical type hollow cylinder 3.Then, it will keep
Ring 9 is placed in the position that connecting hole 5b is provided on the second cylindrical type hollow cylinder 5, so that connecting pin 7 is maintained at connecting hole
In 5b and elongated slot 3b.Finally, then by two snap rings 11 two circumferential recess 5c being caught on the second cylindrical type hollow cylinder 5
In, to which retaining ring 9 and the second cylindrical type hollow cylinder 5 are securely maintained at position.In this way, the first cylindrical type hollow cylinder 3
It can axially be slided relative to each other under the guiding of connecting pin 7 and elongated slot 3b with the second cylindrical type hollow cylinder 5.
As shown in Figs. 1-3, connecting pin 7 falls off from the elongated slot 3b on the first cylindrical type hollow cylinder 3 in order to prevent, elongated
Slot 3b does not penetrate the inner wall of the first cylindrical type hollow cylinder 3.Since hand held electric tool would generally produce in use
Raw more dust, dust can be permeated and be deposited on elongated slot 3b, to interfere the first cylindrical type hollow cylinder 3 and the
Two cylindrical type hollow cylinders 5 sliding axially relative to each other.First is penetrated for this purpose, can be arranged on the bottom wall of elongated slot 3b
The through-hole 3c of the inner wall of cylindrical type hollow cylinder 3.Certainly, elongated slot 3b can also penetrate the interior of the first cylindrical type hollow cylinder 3
Wall, but step or protruding portion are formed with to slidingly support connecting pin 7 on elongated slot 3b side walls.
The internal diameter of the various pieces of first cylindrical type hollow cylinder 3 and the second cylindrical type hollow cylinder 5 can be according to existing
Mode is selected to be suitable for holding cutter.First cylindrical type hollow cylinder 3 is also formed in second end attachment for partly holding
Receive for the clamping element of such as ball or cylinder of clamp-on tool through-hole 3d, place snap ring circumferential recess 3e, Yi Jian
Put the circumferential recess 3f of the end cap of hand held electric tool.Second cylindrical type hollow cylinder 5 is also formed with use in second end attachment
In the mounting hole 5d and circumferential recess 5e that are fixed to the second cylindrical type hollow cylinder 5 on the tube-like piece of hand held electric tool.
Although in preferred embodiment above, the first end 3a of the first cylindrical type hollow cylinder 3 is inserted into the second cylindrical type
In the opposite first end 5a of hollow cylinder 5, and it is provided with elongated slot on the first cylindrical type hollow cylinder, and in the second cylinder
Type hollow cylinder is provided with location hole, it will be appreciated that, it can also be arranged to the first end of the second cylindrical type hollow cylinder 5
5a is inserted into the first end 3a of the first cylindrical type hollow cylinder 3, and is provided with elongated slot on the second cylindrical type hollow cylinder,
And the first cylindrical type hollow cylinder is provided with location hole.
Include the hand held electric tool of cutter holding device of the present invention below in conjunction with the detailed descriptions of Fig. 2 and 3.
For simplicity, part same as the prior art in Fig. 2 and 3 and attached drawing 4-6 is not shown.It is equipped with
The hand held electric tool 20 of the cutter holding device 1 of the preferred embodiment of the present invention is including main casing 21 and passes through support component 23
The tube-like piece 25 being supported in a known manner in main casing 21.At one end（Right side in figure）, equipped with axial past in tube-like piece 25
The piston moved again（It is not shown）.Equipped with the jump bit 27 and impact bolt 29 for being axially reciprocal movement in the other end, tube-like piece.
Gas vent 31 on tube-like piece is between piston and jump bit 27.The outside of tube-like piece 25 is equipped with the control that can be slid on
Sleeve 33.Control sleeve 33 is provided with intermediate sleeve 35.Intermediate sleeve 35 is provided through the kidney slot on tube-like piece 25
37 extend to the drive pin 39 in tube-like piece 25.Certainly, control sleeve 33 can be integrally formed with intermediate sleeve 35.It is controlling
33 outside of sleeve is additionally provided with the resetting spring 41 for pushing control sleeve 33 and intermediate sleeve 35 to move together.
As shown in Figure 3 and 7, the second end of the second cylindrical type hollow cylinder 5 is inserted into tube-like piece 25, and fixed pin 43 passes through
Through-hole 45 on tube-like piece 25 extends in the mounting hole 5d on the second cylindrical type hollow cylinder 5.Retaining ring 47 is arranged in tubulose
On the outside of part 25 and for fixed pin 43 to be held in place.It is placed in the circumferential recess 5e on the second cylindrical type hollow cylinder 5
Snap ring 49 for retaining ring 47 to be held in place on tube-like piece 25.In order to ensure the second cylindrical type hollow cylinder 5 relative to
Tube-like piece 25 is securely fixed, and the outer wall of tube-like piece 25 can circumferentially be provided with stepped part 25a, and the inner wall of retaining ring 47 is then
Circumferentially it is provided with the stepped part 47a to match with the stepped part 25a on the outer wall of tube-like piece 25.In the outside of retaining ring 47
It is provided with the support ring 51 against the flange 47b in retaining ring 47.Support ring 51 is used to support one end of resetting spring 53.When
So, support ring 51 can be integrally formed with retaining ring 47.
Hand held electric tool 20 further includes procapsid 54, setting procapsid 54 and the first cylindrical type hollow cylinder 3 it
Between retaining ring 55 clamping element 57 of such as ball or cylinder is maintained to the through-hole 3d on the first cylindrical type hollow cylinder 3
In, and clamping element 57 is radially inwardly squeezed, with clamp-on tool when needed.On first cylindrical type hollow cylinder 3
Through-hole 3d is dimensioned to the inner cavity for alloing clamping element 57 to be exposed to the first cylindrical type hollow cylinder 3 at least partly
In but not fall off from through-hole 3d.55 one end of retaining ring is against the flange 54a of procapsid 54 to extend internally, and the other end is against calmly
Position ring 59, and locating ring 59 is fixedly protected by the snap ring 61 in the circumferential recess 3e that is placed on the first cylindrical type hollow cylinder 3
It holds in place.Hand held electric tool 20 can also include end cap 63, and end cap 63 snapped onto the first circle by its week inward flange 63a
It is fixedly held on the first cylindrical type hollow cylinder 3 in circumferential recess 3f on column type hollow cylinder 3.In this way, procapsid
54, the first cylindrical type hollow cylinder 3 and end cap 63 are held fixedly together, so as to move together.Above-mentioned reset
The other end of spring 53 is supported on procapsid 54.Therefore, under the action of resetting spring 53, the first cylindrical type hollow cylinder 3
It can axially be slided relative to the second cylindrical type hollow cylinder 5 together with procapsid 54.
The case where hand held electric tool 20 is using standard cutter 65 are described below with reference to Fig. 2-4.
Fig. 2 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool is using standard cutter and under load condition.Fig. 3 is the view similar with Fig. 2, but along
Different taken in section to show the structure of hand held electric tool in more detail.When cutter 65 is in load shape against Seeding location
When state, cutter 65 moves right under axial force F effect, when cutter 65 is moved to a left side of the axial slender slot 65a on cutter 65
When end is contacted with clamping element 57, cutter 65 will overcome the effect of resetting spring 53 to push procapsid 54 in the first cylindrical type
Empty cylinder 3 is from left-most position（That is, when the right end of connecting pin 7 and the elongated slot 3b on the first cylindrical type hollow cylinder 3 contact
Position）It moves right, until cutter 65 also pushes impact bolt 29 to reach its right-most position as described above, that is, work as driving
The position of bolt 29 is impacted when pin 39 is moved to the rightmost side in the kidney slot 37 on tube-like piece 25.Impact bolt 29 is pushed in cutter 65
During moving right, impact bolt 29 pushes jump bit 27 to move right and push drive pin 39 on tube-like piece 25
It moves right in kidney slot 37, until impact bolt 29 reaches its right-most position.Moving right for drive pin 39 passes through intermediate sleeve
Cylinder 35 and 33 compression reseting spring 41 of control sleeve are closed to make control sleeve 33 be moved to the position residing for gas vent 31
Gas vent 31, to by jump bit 27, tube-like piece 25 and piston（It is not shown）Form airtight space.In this way, being transported in piston
When dynamic impact force can be transmitted to cutter 65 by the airtight space.It is produced to reduce when impact bolt 29 pushes drive pin 39
Raw reaction force and the abrasion for reducing impact bolt 29 and drive pin 39 can be arranged and be sleeved on impact bolt 29 with impact bolt
The 29 rubber ring 29a moved together, and setting is in tube-like piece 25, drive pin 39 extends to wherein and with drive pin 39 1
Play mobile rubber ring 39a.
The length of elongated slot 3b on first cylindrical type hollow cylinder 3 can be chosen to reach its rightmost side when impact bolt 29
Connecting pin 7 is contacted with the left end of the elongated slot 3b on the first cylindrical type hollow cylinder 3 when position.It is preferred that the first circle
The length of elongated slot 3b on column type hollow cylinder 3 can be chosen to the connecting pin 7 when impacting bolt 29 and reaching its right-most position
Certain interval is kept with the left end of the elongated slot 3b on the first cylindrical type hollow cylinder 3, as shown in Figure 3.In this way, even if negative
Load state, connecting pin 7 are not also contacted with the end of the elongated slot 3b on the first cylindrical type hollow cylinder 3, and connecting pin 7 will not be by
65 impact force of cutter transmitted by the first cylindrical type hollow cylinder 3, thus the service life of connecting pin 7 can be extended.Fig. 4 is
The cross-sectional view of the hand held electric tool of cutter holding device equipped with the preferred embodiment of the present invention, wherein hand electric
Tool is using standard cutter and under light condition.During being converted from load condition to light condition, cutter 65
Separating operation position.By clamping element 57, resetting spring 53 pushes the first cylindrical type hollow cylinder 3 and cutter 65 with preceding
Shell 54 moves together left-most position.At this point, the elongated slot 3b on connecting pin 7 and the first cylindrical type hollow cylinder 3 is most
Right end contacts.There is gap between cutter 65 and impact bolt 29 since cutter 65 is moved to the left, jump bit 27 can also push away
Dynamic impact bolt 29 is moved to the left.Meanwhile compressed resetting spring 41 pushes control sleeve 33 to be moved to the left, and opens tube-like piece 25
On gas vent 31.In this way, jump bit 27, tube-like piece 25 and piston do not re-form airtight space.Thus, just do not impact
Power is transmitted to cutter 65.
Hand held electric tool 20 is described using the clamping minister's having than standard cutter below with reference to Figures 5 and 6
The case where cutter 65 of clamping part.
Fig. 5 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool uses the cutter of the clamping part with the clamping minister than standard cutter and is in light condition
Under.The case where with using standard cutter, is similar, and the first cylindrical type hollow cylinder 3 is moved to most left under the action of resetting spring 53
Side position.First cylindrical type hollow cylinder 3 can be relative to the maximum distance d that the second cylindrical type hollow cylinder 5 moves with regard to right and wrong
Maximum allowable length of the clamping part of standard cutter than the clamping minister of standard cutter.This distance is so that when using clamping part ratio
It may insure that there are between one between cutter 65 and impact bolt 29 when cutter of the range of the clamping minister of standard cutter within d
Gap g, which, which can ensure that jump bit 27 and control sleeve 33 can be moved to, makes the opening of the gas vent on tube-like piece 25 31
Position, so that it is guaranteed that no impact force is transmitted to cutter 65 in the unloaded state.
Fig. 6 is equipped with the cross-sectional view of the hand held electric tool of the cutter holding device of the preferred embodiment of the present invention,
In, hand held electric tool uses the cutter of the clamping part with the clamping minister than standard cutter and is in load condition
Under.It should be understood that being born using the hand held electric tool of the cutter of the clamping part with the clamping minister than standard cutter
Under load state, the movement of all parts of hand held electric tool and the hand-held using standard cutter described with reference to Fig. 2 and 3
The movement of all parts in electric tool is substantially similar.It is to be noted, however, that Fig. 6 in fact shows hand electric
Tool has the cutter of maximum allowable length using clamping part.In this case, in load, cutter 65 is in responsive to axial force
Under move right can eliminate cutter 65 and impact bolt 29 between existing gap g, push impact bolt 29 as described above
Reach its right-most position.Drive pin 39 moves right through 33 compression reseting spring 41 of intermediate sleeve 35 and control sleeve,
To make control sleeve 33 be moved to the position residing for gas vent 31, gas vent 31 is closed, to by jump bit 27, tube-like piece 25
And piston（It is not shown）Form airtight space.In this way, by the airtight space impact force can be transmitted to cutter 65.
In this process, the first cylindrical type hollow cylinder 3 is still within left-most position without moving right.
Although resetting spring 53 can be when hand held electric tool is using standard cutter and under the load condition
Play the role of reducing vibration to a certain extent, but when hand held electric tool is used with the clamping minister than standard cutter
Clamping part cutter and when under the load condition, clamping element 57 may be at the axial slender slot 65a on cutter 65
In the position that is not contacted with the left end of axial slender slot 65a, in this way can be by reducing between cutter 65 and clamping element 57
Vibration is played the role of further suppressing vibration.
Above in association with specific embodiment to the present invention have been described in detail.It is obvious that above description and in the accompanying drawings
The embodiment shown should be construed as illustrative rather than limitation of the present invention.Those skilled in the art is come
It says, it is readily appreciated that can various variations or modifications carried out to it without departing from the spirit of the invention, these modifications
Or modification is all without departing from the scope of the present invention.
Claims (17)
1. a kind of cutter holding device (1) for hand held electric tool, including：
First cylindrical type hollow cylinder (3)；
Second cylindrical type hollow cylinder (5)；
Wherein, one part in the first cylindrical type hollow cylinder (3) and the second cylindrical type hollow cylinder (5)
It can be slidably insert into another, the first cylindrical type hollow cylinder (3) and the second cylindrical type hollow cylinder
(5) space of a part for the cutter for accommodating the hand held electric tool is limited；And
At least one connecting pin (7), in the first cylindrical type hollow cylinder (3) and the second cylindrical type hollow cylinder (5)
One on be provided with for partly accommodating the connecting holes of the connecting pin (7), the first cylindrical type hollow cylinder (3) and
It is correspondingly provided with axially extending elongated slot on another in the second cylindrical type hollow cylinder (5), is contained in described
The connecting pin (7) in connecting hole is partly extended in the elongated slot so that the first cylindrical type hollow cylinder (3)
It can be under the guiding of the connecting pin (7) and the elongated slot (3b) relative to each other with the second cylindrical type hollow cylinder (5)
Axially slide；
Wherein, the length of the elongated slot (3b) is chosen to be under load condition when the hand held electric tool, the company
End of the outbound (7) not with the elongated slot (3b) is in direct contact；And
The elongated slot (3b) does not penetrate the inner wall of the first cylindrical type hollow cylinder (3), but the bottom of the elongated slot (3b)
The through-hole (3c) for the inner wall for penetrating the first cylindrical type hollow cylinder (3) is provided on wall.
2. cutter holding device (1) as described in claim 1, which is characterized in that the first cylindrical type hollow cylinder (3) and
One in the second cylindrical type hollow cylinder (5) can gapless be slidably inserted into another.
3. cutter holding device (1) as described in claim 1, which is characterized in that further include for protecting the connecting pin (7)
Hold retaining ring (9) in the connecting hole.
4. cutter holding device (1) as claimed in claim 3, which is characterized in that further include being arranged in the connecting hole both sides
Snap ring (11), for the retaining ring (9) to be securely maintained at position.
5. cutter holding device (1) as described in claim 1, which is characterized in that the first cylindrical type hollow cylinder (3)
First end (3a) can gapless be slidably inserted into the opposite first end (5a) of the second cylindrical type hollow cylinder (5), use
It is arranged on the second cylindrical type hollow cylinder (5) in the connecting hole (5b) for partly accommodating the connecting pin (7), institute
Axially extending elongated slot (3b) is stated to be arranged on the first cylindrical type hollow cylinder (3).
6. cutter holding device (1) as claimed in claim 5, which is characterized in that further include for protecting the connecting pin (7)
Hold the retaining ring (9) in the connecting hole (5b).
7. cutter holding device (1) as claimed in claim 6, which is characterized in that further include being arranged in second cylindrical type
It is located at the circumferential recess (5c) of the both sides the connecting hole (5b) on hollow cylinder (5), the circumferential recess (5c) is respectively used to pacify
Put the snap ring (11) that the retaining ring (9) is securely maintained to position.
8. cutter holding device (1) as claimed in claim 5, which is characterized in that on the first cylindrical type hollow cylinder (3)
It is also formed with the through-hole (3d) for partly accommodating the clamping element for clamp-on tool and the circumferential direction for placing snap ring
Groove (3e), it is in place that the snap ring is used to make the retaining ring being maintained at the clamping element in the through-hole (3d) to fix.
9. cutter holding device (1) as claimed in claim 5, which is characterized in that on the first cylindrical type hollow cylinder (3)
It is also formed with the circumferential recess (3f) of the end cap for placing hand held electric tool.
10. cutter holding device (1) as claimed in claim 5, which is characterized in that the second cylindrical type hollow cylinder (5)
On be also formed with for will the second cylindrical type hollow cylinder (5) fixed to the hand held electric tool tube-like piece on
Mounting hole (5d) and circumferential recess (5e).
11. cutter holding device (1) as described in claim 1, which is characterized in that the first cylindrical type hollow cylinder (3)
It is selected to be suitable for holding cutter with the internal diameter of the various pieces of the second cylindrical type hollow cylinder (5).
12. cutter holding device (1) as described in claim 1, which is characterized in that the hand held electric tool (20) is electricity
Hammer or electric pick.
13. a kind of hand held electric tool (20), which is characterized in that the hand held electric tool includes such as claim 1-12
Any cutter holding device (1).
14. hand held electric tool (20) as claimed in claim 13, which is characterized in that when the hand held electric tool packet
When including cutter holding device as claimed in claim 12 (1), the second end of the second cylindrical type hollow cylinder (5) is inserted into
In the tube-like piece (25) of the hand held electric tool (20), fixed pin (43) passes through the through-hole (45) on the tube-like piece (25)
It extends in the mounting hole (5d) on the second cylindrical type hollow cylinder (5), retaining ring (47) is arranged on the tube-like piece (25)
Outside and for the fixed pin (43) to be held in place, snap ring (49) is placed in the second cylindrical type hollow cylinder
(5) in the circumferential recess (5e) on, the retaining ring (47) is held in place on the tube-like piece (25).
15. hand held electric tool (20) as claimed in claim 14, which is characterized in that the outer wall edge of the tube-like piece (25)
It and is circumferentially provided with stepped part (25a), the inner wall of the retaining ring (47) is circumferentially provided with and the stepped part (25a) phase
Matched stepped part (47a).
16. hand held electric tool (20) as claimed in claim 13, which is characterized in that when the hand held electric tool packet
When including cutter holding device as claimed in claim 10 (1), the hand held electric tool (20) procapsid (54) with
It is provided between the first cylindrical type hollow cylinder (3) hollow for clamping element (57) to be maintained at first cylindrical type
The retaining ring (55) in through-hole (3d) on cylinder (3), and the circumferential recess on the first cylindrical type hollow cylinder (3)
It lays in (3f) for by the fixed snap ring (61) in place of the retaining ring (55), to make the procapsid (54) and described
First cylindrical type hollow cylinder (3) is held fixedly together.
17. hand held electric tool (20) as claimed in claim 13, which is characterized in that when the hand held electric tool packet
When including cutter holding device as claimed in claim 11 (1), the end cap (63) of the hand held electric tool (20) passes through it
All inward flanges (63a) snap onto in the circumferential recess (3f) on the first cylindrical type hollow cylinder (3) and fixedly keep
Onto the first cylindrical type hollow cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310279617.7A CN104275685B (en) | 2013-07-03 | 2013-07-03 | Cutter holding device and the hand held electric tool for including this cutter holding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310279617.7A CN104275685B (en) | 2013-07-03 | 2013-07-03 | Cutter holding device and the hand held electric tool for including this cutter holding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104275685A CN104275685A (en) | 2015-01-14 |
| CN104275685B true CN104275685B (en) | 2018-07-31 |
Family
ID=52251277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310279617.7A Active CN104275685B (en) | 2013-07-03 | 2013-07-03 | Cutter holding device and the hand held electric tool for including this cutter holding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104275685B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262551B (en) * | 2017-07-18 | 2021-07-27 | 博世电动工具（中国）有限公司 | Tool holding device for electric tool and electric tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0272209B1 (en) * | 1986-12-17 | 1991-10-02 | HILTI Aktiengesellschaft | Hand tool |
| CN1329164C (en) * | 2001-09-17 | 2007-08-01 | 密尔沃基电动工具公司 | Rotary hammer |
| US7308948B2 (en) * | 2004-10-28 | 2007-12-18 | Makita Corporation | Electric power tool |
| CN103042506B (en) * | 2011-10-17 | 2016-02-10 | 南京德朔实业有限公司 | Clamping device |
| CN102729225B (en) * | 2012-07-12 | 2015-04-08 | 南京德朔实业有限公司 | Quick clamping mechanism |
-
2013
- 2013-07-03 CN CN201310279617.7A patent/CN104275685B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104275685A (en) | 2015-01-14 |
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