CN1781673A - Hammer drill - Google Patents
Hammer drill Download PDFInfo
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- CN1781673A CN1781673A CN 200510128669 CN200510128669A CN1781673A CN 1781673 A CN1781673 A CN 1781673A CN 200510128669 CN200510128669 CN 200510128669 CN 200510128669 A CN200510128669 A CN 200510128669A CN 1781673 A CN1781673 A CN 1781673A
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- cylinder
- operation tool
- switching
- hammer drill
- connector
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D16/006—Mode changers; Mechanisms connected thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/003—Crossed drill and motor spindles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
- B25D2211/06—Means for driving the impulse member
- B25D2211/068—Crank-actuated impulse-driving mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0015—Tools having a percussion-only mode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0023—Tools having a percussion-and-rotation mode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0038—Tools having a rotation-only mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0046—Preventing rotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
- B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
A switching mechanism switches on and off transmission of a striking force to a working tool, and switches on and off transmission of a rotational force to the working tool, thereby switching operation modes among at least a rotation and strike mode, a strike only mode, and a neutral mode. A rotation locking mechanism engages a cylinder during the strike only mode, thereby locking rotation of the cylinder. During the neutral mode, the transmission of the striking force, the transmission of the rotational force, and the locking of rotation of the cylinder are all turned off.
Description
Technical field
The present invention relates to as hammer and the hammer drill that bores function, and comprise and be used for impulsive force is applied to impulsive force transport sector on the operation tool and the revolving force transport sector that is used for revolving force is transferred to operation tool.
Background technology
The hammer drill that is provided with impulsive force transport sector and revolving force transport sector has three kinds of operator schemes traditionally: be used for impulsive force is applied to rotation and the conflicting model that drives the operation tool rotation on the operation tool simultaneously; Be used to drive a rotary mode of operation tool rotation; And be used for impulsive force is applied to a conflicting model on the operation tool.Such hammer drill needs the operator scheme switching mechanism to come according to required operation switching operation modes.
Such operator scheme switching mechanism proposes among 648 (the corresponding Japanese patent application publication No.2002-192481) in U.S. Patent No. 6,557.This operator scheme switching mechanism is provided with gear and the clutch mechanism that is used for each impulsive force transport sector, revolving force transport sector.For switching operation modes, hammer drill use clutch mechanism interrupts the transmission from the revolving force of motor.
Summary of the invention
Except three kinds of operator schemes, hammer drill also has the middle model that is used for mechanically interrupting being transferred to the revolving force of operation tool.Therefore, when power switch is closed, the user can change operation tool and around its axis rotary manipulation instrument so that the blade of instrument is adjusted to required angle.
But in traditional hammer drill of this type, impulsive force is transferred to operation tool in middle model.Therefore, if power switch is opened the angle that the user can not change operation tool or can not adjust operation tool in the process at this moment, because impulsive force is applied on the operation tool.
In addition, aforesaid conventional mode of operation switching mechanism needs the parts and the complicated structure of greater number.As a result, hammer drill has bigger volume and constructs very expensive.In addition, hammer drill is heavier, so more is difficult to operation.
Because aforementioned, an aspect of of the present present invention provides a kind of hammer drill, and described hammer drill can make user security change operation tool and adjust the angle of operation tool.
Other purpose of the present invention provides a kind of hammer drill with switching mechanism, its number by simplifying described structure and reducing the parts in the switching mechanism, make that switching mechanism is compacter, lighter and it is more cheap to manufacture, and easier operation and have the persistence of improvement.
In order to obtain above-mentioned and other purpose, according to an aspect of the present invention, the invention provides a kind of hammer drill.Described hammer drill comprises housing, motor, operation tool, impulsive force transport sector, revolving force transport sector, switching mechanism and rotary locking mechanism.Motor is arranged in the housing and produces revolving force.The impulsive force transport sector comprises cylinder, piston, movement conversion mechanism and impulse member.Cylinder rotatably is supported in the housing.Cylinder extends in the axial direction and has an end and an other end.Operation tool matches with rotatable with cylinder with a described end.Piston is provided with adjacent to the described other end in the cylinder, and can move back and forth in the axial direction.Movement conversion mechanism is converted to the revolving force of motor the reciprocating motion of piston.Impulse member is arranged between the piston in operation tool and the cylinder and in the axial direction slidably.Air chamber is formed in the cylinder between piston and the impulse member.The reciprocating motion of piston produces pressure change in air chamber, allow impulse member that impulsive force is transferred to operation tool.The revolving force transport sector comprises that the revolving force with motor is transferred to the gear of cylinder, thus with the operation tool rotary cylinder.Switching mechanism opens and closes impulsive force is transferred to operation tool, and opens and closes revolving force is transferred to operation tool, thus switching operation modes in rotation and conflicting model, a conflicting model and middle model at least.In the process of middle model, the transmission of impulsive force, the transmission of revolving force, and the locking of the rotation of cylinder all is closed.
According to a further aspect of the invention, the invention provides a kind of hammer drill.Described hammer drill comprises housing, motor, operation tool, impulsive force transport sector, revolving force transport sector, switching mechanism and rotary locking mechanism.Motor is arranged in the housing and produces revolving force.The impulsive force transport sector comprises cylinder, piston, movement conversion mechanism and impulse member.Cylinder rotatably is supported in the housing.Cylinder extends in the axial direction and has an end and an other end.Operation tool matches with rotatable with cylinder with a described end.Described operation tool can radially move.Piston is provided with adjacent to the described other end in the cylinder, and can move back and forth in the axial direction and movable.Movement conversion mechanism is converted to the revolving force of motor the reciprocating motion of piston.Impulse member is arranged between the piston in operation tool and the cylinder and in the axial direction slidably.Air chamber is formed in the cylinder between the piston and impulse member.Described cylinder is formed with at least one through hole, is used to provide the fluid between air chamber and the cylinder outside to be communicated with.The revolving force transport sector comprises that the revolving force with motor is transferred to the gear of cylinder, thus with the operation tool rotary cylinder.Switching mechanism is switching operation modes between first operator scheme and second operator scheme.In first operator scheme, described at least one through hole is closed when a described other end moves at operation tool, and when at least one through hole was closed, the reciprocating motion of cylinder produced reciprocating motion in air chamber, allowed impulse member that impulsive force is transferred to operation tool.In second operator scheme, described at least one through hole is constant opening, and the restriction impulse member is transferred to operation tool with impulsive force.
Description of drawings
These and/or others of the present invention and feature will from the following explanation of embodiment and in conjunction with the accompanying drawings and detail knowledge to, wherein:
Fig. 1 is the side view of hammer drill according to an embodiment of the invention;
Fig. 2 is according to the hammer drill of the first embodiment of the present invention vertical cross-section at rotation and conflicting model;
Fig. 3 A is the side view according to employed switching part in the hammer drill of first embodiment;
Fig. 3 B is the upward view of the switching part shown in Fig. 3 A;
Fig. 4 is the vertical cross-section of hammer drill in a rotary mode;
Fig. 5 is the vertical cross-section of hammer drill in a conflicting model;
Fig. 6 is the vertical cross-section of hammer drill in middle model;
Fig. 7 is the explanation view of the position of the orientation of the cam in the switching part when hammer drill is in rotation and conflicting model and the cam pin on the cam;
Fig. 8 is the explanation view when the position of the orientation of hammer drill cam in the switching part in a rotary mode and the cam pin on the cam;
Fig. 9 is the explanation view when the position of the orientation of hammer drill cam in the switching part in a conflicting model and the cam pin on the cam;
Figure 10 is the explanation view when the position of the orientation of hammer drill cam in the switching part in middle model and the cam pin on the cam;
Figure 11 is the vertical cross-section of hammer drill in a rotary mode according to a second embodiment of the present invention;
Figure 12 be according to a second embodiment of the present invention hammer drill the rotation and conflicting model in vertical cross-section.
The specific embodiment
Hammer drill to embodiments of the invention describes below with reference to accompanying drawings.
＜the first embodiment 〉
Fig. 1 is the side view of hammer drill according to an embodiment of the invention.Hammer drill 1 as shown in Figure 1 can be operated in four kinds of patterns: rotation and conflicting model, a rotary mode, a conflicting model and middle model.Hammer drill 1 comprises and is used to hold impulsive force transport sector, revolving force transport sector and the back housing 2 with the switching mechanism of explanation.
Hammer drill 1 comprises the handle 3 on the rear end that is arranged on housing 2 (right-hand member of Fig. 1); Be arranged on the ON/OFF switch 4 on the handle 3; Be connected to the electric wire 5 that handle 3 is used for electricity is supplied to hammer drill 1; Can be rotatably set in the dial-type switching part 6 that is used for switching operation modes on the side of housing 2; And be provided with near the front end of housing 2 and the assist handle 7 of lateral protrusions (towards the observer of Fig. 1).
The back is installed in the operation tool 26 (referring to Fig. 2) of explanation on the front end of hammer drill 1.Operation tool 26 receives impulsive forces, revolving force or the two carries out required operation.
Then, the internal structure of hammer drill 1 describes with reference to Fig. 2 to Fig. 3 B.
Fig. 2 is the vertical cross-section of demonstration according to the associated components of the hammer drill 1 of the first embodiment of the present invention.Fig. 3 A is a side view, and Fig. 3 B is to use the upward view of the switching part 6 in hammer drill 1.For illustrative purposes, being arranged on switching part 6 on the side of housing 2 is shown in Fig. 2 and moves 90 degree.
Housing 2 is configured with electric machine casing 2A and is attached to the cylinder shell 2B at the top of electric machine casing 2A.Electric machine casing 2A holds the drive source of motor 8 as hammer drill 1.Motor 8 is set up such output shaft (motor shaft) 9 and raises up from motor 8.Pinion 10 is integrally formed with the top of output shaft 9.
Crank axle 11 also rotatably is supported on the motor 8 by vertical setting with jackshaft 12, and each is on the either side of output shaft 9.Gear 13 is being mounted respectively on the centre position on crank axle 11 and jackshaft 12 at relative its height with 14. Gear 13,14 and be formed on pinion 10 engagements on the top of output shaft 9.Crank-pin 15 is formed with crank axle 11 and is stood vertically from the top of crank axle 11 in the position from the pivot off-centre of crank axle 11.Having more, the bevel gear 16 of minor diameter is integrally formed on the top of jackshaft 12.
Cylinder shell 2B horizontal-extending on fore-and-aft direction.Cylinder 17 is set in the horizontal alignment of cylinder shell 2B.Cylinder 17 rotatably is supported on two axle heads by ball bearing 18 and metal bearing 19 respectively.Piston 20 and impulse member 21 are engaged in the cylinder 17 slidably.Piston 20 is connected to the crank-pin 15 of crank axle 11 by connecting rod 22.One end of connecting rod 22 is connected with piston 20 by piston pin 23.
Two slidably sleeve 30,31 cooperate and can on fore-and-aft direction, slide around the periphery of cylinder 17.Sliding sleeve 30 is placed forward than slidably sleeve 31 is farther.A plurality of mating groove 30a are formed on slidably the interior week of sleeve 30 to go up and extend axially and are used to cooperate described pin 29.
Spin locking spare 32 radially outward is provided with from sleeve 31 slidably.The outer surface of spin locking spare 32 matches with the interior perimeter surface of cylinder shell 2B by spline fitted.Therefore, spin locking spare 32 can endwisely slip on the interior perimeter surface of cylinder shell 2B, but can not rotate in a circumferential direction.Compression spring 33 is installed in and is used for promoting backward consistently spin locking spare 32 between spin locking spare 32 and the ball bearing 18.The rear end surface of spin locking spare 32 contacts with the peripheral surface (cam face) of cam 6a in being arranged on switching part 6.
Fig. 3 A, 3B have shown the detailed structure of switching part 6.The above-mentioned cam 6a that mentions is integrally formed on the switching part 6 and has cam face as the indicated profile of Fig. 3 B.Cam pin 6b one is with forming at the end surface from the cam 6a of the locational end surface projection of the pivot of switching part 6 skew from end surface.
As shown in Figure 2, having larger-diameter bevel gear 34 rotatably is being supported on the peripheral surface of cylinder 17 on the rear end.Bevel gear 34 with have than bevel gear 34 more the bevel gear 16 of minor diameter engage.Bevel gear 34 rotatably is supported on the cylinder shell 2B by the rear end and the metal bearing 19 of cylinder 17.
Connector 35 cooperates by the outer surface of spline fitted around cylinder 17 between spin locking spare 32 and the bevel gear 34, and can (fore-and-aft direction) sliding on the axial direction of cylinder 17, still cylinder 17 rotates in a circumferential direction relatively.In other words, connector 35 is with cylinder 17 rotations.Compression spring 36 is installed in connector 35 and slidably is used between the parts 31 promoting connector 35 consistently backward, and the step part that is formed on like this on the preceding circumferential portion of connector 35 contacts with the cam pin 6b of switching part 6.A plurality of engaging claw 35a are formed on the front end of connector 35.Engaging claw 35a engages with engaging claw 32a on a plurality of rear end surfaces that are formed on spin locking spare 32 alternatively.A plurality of engaging claw 35b (referring to Fig. 5) are formed on the end surface of connector 35 and are used for engaging with a plurality of engaging claw 34a (referring to Fig. 5) that are formed on the bevel gear 34 alternatively.Connector 35 disposes gear clutch (dogclutch) with spin locking spare 32 and bevel gear 34.
In addition, aforesaid gear 14, jackshaft 12, bevel gear 16,34, connector 35, cylinder 17 etc. constitute the revolving force transport sector.The revolving force transport sector is transferred to operation tool 26 with the rotation of output shaft 9 and is used to drive operation tool 26 rotations.
In addition, aforesaid airport 25, annular element 28, pin 29, slidably sleeve 30,31, spring 36, connector 35, spin locking spare 32 etc. constitute switching mechanisms.
Then, with reference to Fig. 2,4-10 the hammer drill with said structure is in 1 at hammer drill) rotation and conflicting model, 2) rotary mode, 3) conflicting model and 4) operation during middle model (intermediateness) describes.Fig. 2 has shown the vertical cross-section of the associated components of hammer drill in rotation and the conflicting model.Fig. 4,5 and 6 has shown the vertical cross-section of the relevant portion of hammer drill in the process of a rotary mode, a conflicting model and middle model respectively.Fig. 7,8,9 and 10 has shown the explanation view of the position of the cam pin 6b of the orientation of the cam 6a in the switching mechanism 6 and cam 6a in the process of rotation and conflicting model, a rotary mode, a conflicting model and middle model respectively.
1) rotation and conflicting model
In rotation and conflicting model, hammer drill 1 is applied to impulsive force and drives operation tool 26 rotations on the operation tool 26 simultaneously.When switching part 6 was rotated with selection rotation and conflicting model, the cam 6a and the cam pin 6b of switching part 6 were placed as shown in Figure 7.At this moment, connector 35 engages with bevel gear 34, as shown in Figure 2, and engaging claw 35b and engaging claw 34a (referring to Fig. 5) joint (clutch is ON).In addition, as shown in Figure 2, the spin locking spare 32 of the front surface of rear end surface contact cam 6a separates (clutch is OFF) from connector 35.
When motor 8 was driven, the rotation of output shaft 9 was slowed down by pinion 10, gear 14, jackshaft 12 and bevel gear 16,34, and is transferred to cylinder 17 by the connector 35 that cooperates with bevel gear 34.Therefore, cylinder 17 and the operation tool 26 that is installed on the end of cylinder 17 are actuated to rotation, and operation tool 26 is as brill like this.
The rotation of the output shaft 9 in the motor 8 is also slowed down by pinion 10 and gear 13, and is transferred to crank axle 11, and crank axle 11 is actuated to rotate on predetermined speed like this.Crank-pin 15 and connecting rod 22 are converted to the rotation of crank axle 11 reciprocating linear motion of the cylinder 20 on the fore-and-aft direction within the cylinder 17.When operation tool 26 pushes the workpiece (not shown) this moment, the reaction force of gained is transferred to slidably sleeve 31 by intermediate member 27, annular element 28, pin 29 and slidable pin 30.As a result, slidably the motive force of sleeve 31 and spring 36 relative to and on cylinder 17, move the airport 25 that is formed on sealing in the cylinder 17 backward.As a result, be formed on the state that air chamber 24 in the cylinder 17 is in sealing.The reciprocating motion of piston 20 has changed the interior pressure in the air chamber 24, causes impulse member 21 to move back and forth on the fore-and-aft direction within the cylinder 17 and intermittently impacts intermediate member 27.By this impact, impulsive force is transferred to operation tool 26 from middle parts 27.
2) rotary mode
In a rotary mode, 1 of hammer drill is transferred to operation tool 26 with revolving force and rotates to drive operation tool 26.Rotary mode is by selecting from position rotation switching part 6180 degree as shown in Figure 7, and the cam pin 6b of cam 6a and switching part 6 is settled as shown in Figure 8 like this.
At this moment, the contacted connector 35 of the cam pin 6b of step part on the outer surface and switching part 6 is connected to bevel gear 34, as in rotation and conflicting model, and engaging claw 35b and engaging claw 34a (referring to Fig. 5) joint (clutch is ON).In addition, the spin locking spare 32 of the front surface of rear surface contact cam 6a moves forward by the motive force of the relative spring 33 of cam 6a, to contact sleeve 31 slidably and to move forward with the periphery along cylinder 17 of sleeve 30 slidably.As a result, when slidably sleeve 31 was moved, the seal on the airport 25 was disconnected, and extraneous air can enter the air chamber 24 that is formed on the cylinder 17 by airport 25 like this.
Because connector 35 and bevel gear 34 engage (clutch is ON) in a rotary mode, the rotation of output shaft 9 is transferred to cylinder 17 along rotation with the described identical path of conflicting model.Therefore, cylinder 17 and the operation tool 26 that is installed on the cylinder 17 are driven in rotation, and 26 of operation tools are used as and bore like this.
As in rotation and conflicting model, the rotation of the output shaft 9 in the motor 8 is converted into the reciprocating linear motion of the piston 20 within the cylinder 17 in the rotary mode.But, because the airport 25 in the cylinder 17 is opened as mentioned above, allow extraneous air by the air chamber 24 in the cylinder 17, the reciprocating motion of piston 20 does not produce pressure change in air chamber 24, interrupted thus impulsive force is transferred to operation tool 26.Therefore, 26 of operation tools are driven in rotation.At this moment, the reaction force of the power of operation tool 26 extruding workpiece is transferred to intermediate member 27, annular element 29, pin 29 and sleeve 30,31 slidably.But because slidably sleeve 31 contacts with spin locking spare 32, slidably the motion of sleeve 31 is limited on the circumferential direction, thus airport 25 is remained in the state of opening.
3) conflicting model
In a conflicting model, have only impulsive force to be transferred to operation tool 26.In order to select a conflicting model, switching part 6 turn 90 degrees from position dextrorotation as shown in Figure 8.In this state, the cam pin 6b of Fig. 6 a and switching part 6 is settled as shown in Figure 9.
At this moment, as shown in Figure 5, with the cam pin 6b of the contacted switching part 6 of step part on the periphery of connector 35 connector 35 is moved forward on cylinder 17, connector 35 separately and with spin locking spare 32 engages from bevel gear 34 like this.Spin locking spare 32 rotates connector 35 lockings to prevent connector 35.Therefore, the engaging claw 35b of connector 35 breaks away from (clutch is ON) from the engaging claw 35b of bevel gear 34.Because the rotation of cylinder 17 and operation tool 26 is locked in the conflicting model, has only impulsive force to be transferred to operation tool 26.Therefore, hammer drill 1 can be carried out effectively as hammer.
In addition, the spin locking spare 32 of the cam face of rear end surface contact cam 6a moves to as on the position identical in rotation and the conflicting model.When the reaction force of operation tool 26 to the extruding workpiece was applied to slidably on the sleeve 31, slidably sleeve 31 moved to the position that is used for sealing the airport 25 that is formed on cylinder 17.
Because connector 35 and bevel gear 34 break away from a rotary mode, as mentioned above, bevel gear 34 is dallied on cylinder 17, thereby this rotation is not transferred to cylinder 17.As a result, cylinder 17 and the operation tool 26 that is installed on the cylinder 17 are in the non-rotating state, and the rotation of these parts locks by the joint between connector 35 and the spin locking spare 32.
As in rotation and conflicting model, the slidably sleeve 31 in the rotary mode also seals the airport 25 that is formed in the cylinder 17, air chamber 24 is remained in the state of basic sealing.Therefore, the reciprocating motion of piston 20 produces pressure change in air chamber 24.As mentioned above, these pressure changes are transferred to operation tool 26 with impulsive force by impulse member 21 and intermediate member 27, and operation tool 26 is as hammer like this.
4) middle model
In middle model, revolving force and impulsive force all are not transferred to operation tool 26.Middle model is by 45 degree that roughly turn clockwise from as shown in Figure 9 position.In this state, the cam pin 6b of cam 6a and switching part 6 is settled as shown in figure 10.
At this moment, as shown in Figure 6, the cam pin 6b of the switching part 6 of the step part on the periphery of contact connector 35 moves forward connector 35 on cylinder 17.As a result, connector 35 separates from bevel gear 34, not engage with bevel gear 34 or spin locking spare 32.
In addition, as in a rotary mode, cam 6 utilizes the motive force of spring 33 to rotate described spin locking spare 32 forward.Spin locking spare 32 contact sleeve slidably 31 and slidably sleeve 31 move forward with the periphery of sleeve 30 slidably along cylinder 17.Therefore, the seal on the airport 25 disconnects, and allows extraneous air to enter air chamber 24.
In aforesaid middle model, connector 35 breaks away from (clutch is OFF) from bevel gear 34 and spin locking spare 32, and the airport 25 that is formed in the cylinder 17 is opened.Therefore, impulsive force or revolving force all are not transferred to operation tool 26, and operation tool 26 is not operated like this.Because operation tool 26 can dally in this state, the angular position of operation tool 26 can be easy to adjust.
Because operation tool 26 dallies in middle model, the operation tool that the user can be different with operation tool 26 usefulness is changed or can be easy to adjust the angular position of operation tool 26 to the desired position.In addition, because the position that spin locking spare 32 has limited the slidably sleeve 31 in middle model, airport 25 is always opened like this, impulsive force is not transferred to operation tool 26, the user can change the angular position of operation tool 26 or adjustment operation tool 26 safely like this, even when ON/OFF switch 4 is opened in the process of such operation.
Because traditional hammer drill is configured to impulsive force is transferred to operation tool 26 when ON/OFF switch 4 is opened in middle model, the problem of unexpectedly rotating such as operation tool 26 may be set to middle model and the user thinks that operator scheme takes place when being set to conflicting model in operator scheme.But, can prevent the generation of this problem in middle model reliably according to hammer drill of the present invention.
In aforesaid embodiment, switching part 6 is operated with opening and closing and is formed on airport 25 in the cylinder 17 with sleeve 31 slidably with switching shock pattern ON and OFF, and connector 35 is engaged with bevel gear 34 or connector is broken away to switch rotary mode ON and OFF from hammer gear 34.Therefore, the slidably sleeve 31 and the connector 35 that constitute switching mechanism can be provided with around cylinder 17, have simplified the structure of switching mechanism thus and have reduced the number of the parts in this mechanism.As a result, just can construct lighter, make more cheap, easier operation and more lasting more compact hammer drill 1.
In addition, by rotary manipulation instrument 26 simply, the cam pin 6b sliding connector 35 cam 6a slip simultaneously spin locking spare 32 of switching part 6, use such mechanism, operator scheme can be switched among rotation and conflicting model, a conflicting model, a rotary mode and middle model, has simplified the operation of switching mechanism thus.
When switching to a rotary mode from a conflicting model or must changing operation tool 26 conversely the time.Therefore, shown in Fig. 7-10, in the present embodiment, middle model be positioned in a conflicting model and only between the rotary mode with switching part 6 switching operation modes.Use such structure, switching part 6 always switch to a rotary mode from a conflicting model or conversely the time by middle model, need to change operation tool 26 this moment.Therefore, this structure has made things convenient in the replacing of functional unit 26 in middle model before the switching operation modes.
Following table 1 has been listed connector 35 and the engagement state between the bevel gear 34 (ON or OFF) and the open that is formed on cylinder 17 airports 25 of each operator scheme that is used for present embodiment.
| Operator scheme | The engagement state of connector and bevel gear | The open of the airport in the cylinder |
| Rotation and conflicting model | ON | Closed |
| Rotary mode | ON | Open |
| Conflicting model | OFF | Closed |
| Middle model | OFF | Open |
Following table 2 has been listed the ON/OFF state (engagement state between connector 35 and the bevel gear 34) of the revolving force transmission of each operator scheme that is used for present embodiment, the ON/OFF state (open of airport 25) of impulsive force transmission, and the ON/OFF state of spin locking function (engagement state between connector 35 and the spin locking spare 32).
| Operator scheme | The revolving force transmission | The impulsive force transmission | The revolving force lock function |
| Rotation and conflicting model | ON | ON | OFF |
| Conflicting model | OFF | ON | ON |
| Middle model | OFF | OFF | OFF |
| Rotary mode | ON | OFF | OFF |
＜the second embodiment 〉
Then, with reference to Figure 11,12 explanations hammer drill according to a second embodiment of the present invention.
Figure 11 is the vertical cross-section of hammer drill 101 in a rotary mode according to a second embodiment of the present invention, Figure 12 is the vertical cross-section of hammer drill 101 in rotation and conflicting model according to a second embodiment of the present invention, and the identical Reference numeral of wherein similar part and parts use is repeated in this description avoiding.
In the hammer drill 101 according to second embodiment, cylinder 117 is held moving on the direction of front and back.Bevel gear 34 cooperates by the periphery of the cylinder 117 of spline fitted on the rear end, and cylinder 117 relatively bevel gear 34 move forward and backward.Cylinder 117 is with bevel gear 34 rotations.In the present embodiment, operation tool 26 is installed on the cylinder 117 by instrument sleeve 37.Use such structure, cylinder 117 and operation tool 26 are consistently with bevel gear 34 rotations.
In addition, slidably sleeve 38 and fixed muffle 39 cooperates around the periphery of cylinder 117.Slidably sleeve 38 be held with on the direction of front and back on cylinder 117 slidably.Fixed muffle 39 is fixed on the axial direction of cylinder 117 by holding ring 40.Being arranged on slidably, the compression spring 41 between the sleeve 38 and fixed muffle 39 promotes slidably sleeve 38 consistently forward.
In the hammer drill 101 with this structure, operation tool 26 is driven consistently with rotation, but the user can select between a rotary mode and rotation and conflicting model.
Then, explanation is used for 1) rotary mode and 2) operation of hammer drill 101 of rotation and the second embodiment of the present invention of conflicting model.
1) rotary mode
As shown in figure 11, by rotation switching part 106, thereby the cam 106a of switching part 106 contacts slidably sleeve 38 and moves forward slidably sleeve 38, selects a rotary mode.In a second embodiment, the pin 29 that is bonded in the sleeve 38 slidably is inserted into by not moving within elongated hole 17a as first embodiment with being fixed in the cylinder 117.Therefore, this moment, cylinder 117 moved forward with sleeve 38 slidably forward, be formed on the position that airport 25 in the cylinder 117 moves to the front portion of fixed muffle 39, will disconnect such extraneous air by fixed muffle 39 formed sealings thus can enter air chamber 24 by airport 25.
When motor 8 was driven, the rotation of output shaft 9 was slowed down before being transferred to cylinder 117 by pinion 10, gear 14, jackshaft 12 and bevel gear 16,34.As a result, cylinder 117 and the operation tool 26 that is installed on the end of cylinder 117 are actuated to rotation, and operation tool 26 is as brill like this.
In addition, after slowing down by pinion 10 and gear 13, the rotation of the output shaft 9 in motor 8 similarly is transferred to crank axle 11.Crank-pin 15 and connecting rod 22 are converted to the rotation of crank axle 11 reciprocating linear motion of the piston 20 within cylinder 117.But because airport 25 is in the state of opening in cylinder 117, as mentioned above, this makes extraneous air enter air chamber 24, and the reciprocating motion of piston 20 does not produce pressure change in air chamber 24.Therefore, impulsive force be not transferred to operation tool 26 and therefore operation tool 26 to rotation with as boring.
2) rotation and conflicting model
As shown in figure 12, rotation and conflicting model are selected by rotation switching part 106, and the slidably sleeve 38 that contacts the cam 106a of switching part 106 and cylinder 117 like this moves backward.At this moment, fixed muffle 39 sealings are formed on the airport 25 in the cylinder 117.
In rotation and conflicting model, the rotation of output shaft 9 along with a rotary mode in identical path be transferred to cylinder 117.Therefore, cylinder 117 and the operation tool 26 that is installed on the end of cylinder 117 are driven in rotation, and operation tool 26 is as brill like this.
In addition, because the airport 25 that is formed in the cylinder 117 seals by fixed muffle 39 in rotation and conflicting model, the air chamber 24 in the intermediate member 27 will be maintained in the state of sealing.Therefore, the reciprocating motion of piston 20 produces pressure and changes in air chamber 24, causes impulse member 21 front and back in cylinder 117 intermittently to impact intermediate member 27 toward redoubling.Therefore, intermediate member 27 is transferred to operation tool 26 with impulsive force, and operation tool 26 is also as hammer like this.
In aforesaid second embodiment, switching part 106 is operated to pass through slidably sleeve 38 and moves cylinder 117 to open and close airport 25 and switching shock pattern ON and OFF.Therefore, slidably sleeve 38 and the fixed muffle 39 that constitutes switching mechanism can be installed around cylinder 117.Among aforesaid first embodiment, second embodiment has simplified the structure of switching mechanism and has reduced the number of parts required in this mechanism.Therefore, just can construct lighter, make more cheap, easier operation and more lasting more compact hammer drill 101.
Although preferred embodiments of the present invention have been disclosed for illustrative one with ordinary skill in the art would appreciate that and can make amendment to the present invention under the situation that does not deviate from spirit of the present invention and essence, its scope is by claims and be equal to and limit.
Claims (17)
1. hammer drill comprises:
Housing;
Be arranged in the housing and produce the motor of revolving force;
Operation tool;
The impulsive force transport sector comprises:
Rotatably be supported on the cylinder in the described housing, described cylinder extends in the axial direction and has an end and an other end, and operation tool engages with rotatable with cylinder with a described end;
Piston, described piston setting be adjacent to the described other end in the cylinder, and can move back and forth in the axial direction;
Movement conversion mechanism, described movement conversion mechanism are converted to the revolving force of motor the reciprocating motion of piston; And
Impulse member, described impulse member is arranged in the cylinder between the operation tool and piston and in the axial direction slidably, air chamber is formed in the cylinder between piston and the impulse member, and the reciprocating motion of piston produces pressure change in air chamber, allows impulse member that impulsive force is transferred to operation tool;
The revolving force transport sector comprises that the revolving force with motor is transferred to the gear of cylinder, thus with the operation tool rotary cylinder;
Switching mechanism, described switching mechanism open and close the transmission of impulsive force to operation tool, and open and close the transmission of revolving force to operation tool, thus switching operation modes between rotation and conflicting model, a conflicting model and middle model at least; And
Rotary locking mechanism, described rotary locking mechanism engages cylinder in the process of a conflicting model, thus the rotation of lock cylinder;
Wherein, in the process of middle model, the locking of the rotation of the transmission of impulsive force, the transmission of revolving force and cylinder all is closed.
2. hammer drill according to claim 1, wherein, described cylinder has outer surface; And
Wherein said cylinder is formed with at least one through hole, and the fluid that is used to be provided between air chamber and the cylinder outside is communicated with,
Also comprise:
Center on the sleeve of the outer surface setting of cylinder, described sleeve in the axial direction slidably is used to open and close described at least one through hole, is communicated with the fluid between permission and blocks air chamber and the cylinder outside, opens and closes the transmission of impulsive force thus; And
Limited part, in the process of middle model, the slippage of described limited part restriction sleeve is used to open described at least one through hole.
3. hammer drill according to claim 2, wherein, described revolving force transport sector also comprises the connector that is provided with around the outer surface of cylinder, described connector cooperates with the cylinder outer surface by spline fitted with the outer surface of cylinder, allows connector in the axial direction slidably to be used for gear engagement and from described gear disengaging;
Wherein said housing has interior perimeter surface;
Wherein said rotary locking mechanism comprise be arranged in the housing and with the spin locking spare that the interior perimeter surface of housing cooperates by spline fitted, allow spin locking spare slidably to engage with connector and break away from being used in the axial direction from connector; And
Wherein spin locking spare is as limited part.
4. hammer drill according to claim 3, wherein, in the process of middle model, connector breaks away from from gear and spin locking spare, and described at least one through hole is opened.
5. hammer drill according to claim 3, wherein, described switching mechanism comprises the switching part with cam pin and cam; And
Wherein when switching part rotates, cam pin slides connector engaging with gear and spin locking spare and to break away from from it, and cam slide spin locking spare is with the position of change sleeve.
6. hammer drill according to claim 3, wherein, in the process of a conflicting model, connector engages with spin locking spare to be used for the rotation of lock cylinder and operation tool.
7. hammer drill according to claim 1, wherein, described operator scheme further comprises a rotary mode; And
Wherein in the process of a rotary mode, the transmission of switching mechanism closing impact and the transmission of opening revolving force are transferred to operation tool with revolving force thus, and do not transmit described impulsive force.
8. hammer drill according to claim 7, wherein, switching mechanism comprises the switching part that can operate on a plurality of switching positions; And
Wherein middle model is set between a conflicting model and the rotary mode to use the switching part switching operation modes.
9. hammer drill comprises:
Housing;
Be arranged in the housing and produce the motor of revolving force;
Operation tool;
The impulsive force transport sector comprises:
Rotatably be supported on the cylinder in the housing, described cylinder extends in the axial direction and has an end and an other end, and operation tool engages with rotatable with cylinder with a described end, and described operation tool can move in the axial direction;
Piston, described piston setting be adjacent to the described other end in the cylinder, and can move back and forth in the axial direction;
Movement conversion mechanism, described movement conversion mechanism are converted to the revolving force of motor the reciprocating motion of piston; And
Impulse member, described impulse member be arranged on operation tool in the cylinder and piston between and in the axial direction slidably, air chamber is formed in the cylinder between piston and the impulse member, and described cylinder is formed with at least one through hole, is used to provide the fluid between air chamber and the cylinder outside to be communicated with;
The revolving force transport sector comprises that the revolving force with motor is transferred to the gear of cylinder, thus with the operation tool rotary cylinder; And
Switching mechanism, switching mechanism is switching operation modes between first operator scheme and second operator scheme,
In first operator scheme, described at least one through hole is closed when a described other end moves at described operation tool, and when described at least one through hole was closed, the reciprocating motion of cylinder produced pressure and changes in air chamber, allowed impulse member that impulsive force is transferred to operation tool; And
In second operator scheme, described at least one through hole is constant opening, and the restriction impulse member is transferred to operation tool with impulsive force.
10. hammer drill according to claim 9, wherein, described switching mechanism comprises the sleeve that is provided with around cylinder, and described sleeve in the axial direction slidably is used for closing described at least one through hole in first operator scheme during towards a described other end motion when operation tool; And
Wherein switching mechanism by the restriction amount of exercise of sleeve switching operation modes.
11. hammer drill according to claim 9, wherein, described switching mechanism by the restriction operation tool towards the amount of exercise of a described other end and switching operation modes.
12. hammer drill according to claim 9, wherein, described cylinder is removable in the axial direction when a described other end moves at operation tool; And
Wherein said switching mechanism is switching operation modes by the amount of movement of restriction cylinder.
13. hammer drill according to claim 9, wherein, described switching mechanism is included in rotatable cam in a plurality of position of rotation; And
Wherein switching mechanism is according to the position of rotation switching operation modes of cam.
14. hammer drill according to claim 9, wherein, described switching mechanism can switch to operator scheme the 3rd operator scheme, and wherein revolving force is closed to the transmission of cylinder.
15. hammer drill according to claim 9, wherein, described switching mechanism at least can be at rotation and conflicting model, a rotary mode and switching operation modes between the conflicting model only.
16. hammer drill according to claim 9, wherein, described cylinder has outer surface;
Its middle gear is rotatably supported around the outer surface of cylinder;
Wherein said revolving force transport sector also comprises the connector that is provided with around the outer surface of cylinder, connector cooperates by spline fitted with the outer surface of cylinder, allows connector in the axial direction slidably to be used for gear engagement with from described gear disengaging; And
Wherein said switching mechanism comprises switching part, and described switching part is operated between first switching position of connector and gear engagement and second switching position that wherein connector breaks away from from gear at least therein.
17. hammer drill according to claim 16, wherein, switching part is included in switching part and is operated the be dynamically connected cam pin of part of time shift, allows connector to engage with gear on first switching position, and allows to break away from from gear at the second switching position upper connector.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004338864 | 2004-11-24 | ||
| JP2004338864A JP4446248B2 (en) | 2004-11-24 | 2004-11-24 | Hammer drill |
| JP2005115734 | 2005-04-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1781673A true CN1781673A (en) | 2006-06-07 |
| CN100415453C CN100415453C (en) | 2008-09-03 |
Family
ID=36459905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510128669XA Active CN100415453C (en) | 2004-11-24 | 2005-11-23 | Hammer drill |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4446248B2 (en) |
| CN (1) | CN100415453C (en) |
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| CN101664917B (en) * | 2008-09-01 | 2011-09-07 | 苏州宝时得电动工具有限公司 | Hammer drill |
| CN102672681A (en) * | 2011-03-18 | 2012-09-19 | 株式会社牧田 | Impact tool |
| CN101844345B (en) * | 2009-03-23 | 2012-11-14 | 株式会社牧田 | Impact tool |
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| CA1136446A (en) * | 1979-06-18 | 1982-11-30 | Norman J. Ince | Hammer drill |
| DE3826213A1 (en) * | 1988-08-02 | 1990-02-15 | Bosch Gmbh Robert | DRILLING HAMMER |
| JP3574240B2 (en) * | 1995-11-13 | 2004-10-06 | 株式会社マキタ | Hammer drill |
| JP3582760B2 (en) * | 1997-04-18 | 2004-10-27 | 日立工機株式会社 | Hammer drill |
| DE19810088C1 (en) * | 1998-03-10 | 1999-08-26 | Bosch Gmbh Robert | Hammer and boring drill |
| JP3688943B2 (en) * | 1999-08-26 | 2005-08-31 | 株式会社マキタ | Hammer drill |
| JP4016772B2 (en) * | 2001-11-16 | 2007-12-05 | 日立工機株式会社 | Hammer drill |
| GB2394517A (en) * | 2002-10-23 | 2004-04-28 | Black & Decker Inc | Powered hammer having a spindle lock with synchronising element |
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| CN101664917B (en) * | 2008-09-01 | 2011-09-07 | 苏州宝时得电动工具有限公司 | Hammer drill |
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| US10583544B2 (en) | 2012-06-05 | 2020-03-10 | Robert Bosch Gmbh | Hand-held power tool device |
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| WO2014121728A1 (en) * | 2013-02-06 | 2014-08-14 | 苏州宝时得电动工具有限公司 | Power tool and clamping device |
| CN103963021A (en) * | 2013-02-06 | 2014-08-06 | 苏州宝时得电动工具有限公司 | Power tool |
| CN104994997A (en) * | 2013-03-26 | 2015-10-21 | 日立工机株式会社 | Electric tool |
| CN105415297A (en) * | 2015-12-02 | 2016-03-23 | 江苏东成机电工具有限公司 | Handheld multifunctional electric hammer |
| WO2020056654A1 (en) * | 2018-09-20 | 2020-03-26 | 博世电动工具（中国）有限公司 | Impact machine tool |
| CN112770873A (en) * | 2018-09-20 | 2021-05-07 | 博世电动工具（中国）有限公司 | Impact machine tool |
| CN112770873B (en) * | 2018-09-20 | 2023-09-22 | 博世电动工具（中国）有限公司 | Impact machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006142459A (en) | 2006-06-08 |
| JP4446248B2 (en) | 2010-04-07 |
| CN100415453C (en) | 2008-09-03 |
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