CN201253840Y - Hammer drill type power tool - Google Patents

Abstract

A hammer drill-type power tool comprises a hammer mechanism (6) for realizing a hammering function and a drill mechanism (7) for realizing a drilling function; the hammer mechanism (6) and the drill mechanism (7) are driven by a motor (5) located inside a shell body (1) and can be switched under a torque transmission state and a disconnected torque transmission state through respective sliding clutch; the hammer drill-type power tool also comprises a working mode switching mechanism; the working mode switching mechanism comprises an adjusting knob (9) and a shifting fork (10); the adjusting knob (9) is connected with the sliding clutch of the drill mechanism (7); the shifting fork (10) is connected with the sliding clutch of the hammer mechanism (6); moreover, the adjusting knob (9) and the shifting fork (10) are movably connected to drive the shifting fork (10) to be located under a first position and a second position; when the shifting fork (10) is located under the first position, the hammer mechanism (6) can transfer torque; and when the shifting fork (10) is located under the second position, the hammer mechanism (6) disconnects the torque transmission, while the drill mechanism (7) can transfer torque.

Description

Hammer drill type power tool

Technical field

The utility model relates to a kind of hammer drill type power tool, particularly a kind of hammer drill type power tool with working mode change mechanism is in order to realize the conversion mutually under the mode of operation that hammering pattern, drill mode and hammer drill combine at least of described hammer drill type power tool.

Background technology

Hammer drill type power tool can be changed between multiple mode of operation according to user's needs, and basic mode of operation generally comprises simple hammering pattern, the pattern that simple drill mode and hammer drill combine.At above-mentioned mode of operation, the operator can realize by working mode change mechanism.

U.S. Pat 6015017A discloses a kind of electric hammer.This electric hammer comprises hammer mechanism and rig structure, and described hammer mechanism and rig structure drive by the motor that is arranged in the casing, and can realize hammering function and boring function respectively.Certainly, under the situation that this hammer mechanism and rig structure are driven by motor at the same time, electric hammer then is operated under the mode of operation that hammer drill combines.For the ease of the operator mode of operation of electric hammer is regulated, this electric hammer also comprises working mode change mechanism, and it comprises the adjustment cam that can manipulate for the operator and the slide bar assembly that connects with the adjustment cam activity.Wherein, adjustment cam is connected the casing outside can supply operator's manual operation, and, the inboard of adjustment cam is provided with cam pin, cam pin is connected with slip-clutch in the hammer mechanism, the slip-clutch that is used for governor weight mechanism slides, and connects or off-state thereby hammer mechanism integral body is, and whether the moment of torsion transmission is promptly arranged; One end of slide bar assembly is formed with shift fork, and shift fork is connected with slip-clutch in the rig structure, and the slip-clutch that is used for regulating the rig structure slides, and connects or off-state thereby rig structure integral body is, and whether the moment of torsion transmission is promptly arranged.Simultaneously, the other end of this slide bar assembly again with the linking together of adjustment cam activity, and be subjected to the driving of adjustment cam and produce slip.

When the operator rotates adjustment cam, the slip-clutch of the cam pin on the adjustment cam on can governor weight mechanism, simultaneously, adjustment cam can drive the slide bar assembly again and slide, and the slip-clutch that the slide bar assembly drives again on the rig structure slides.

And the general working mode change mechanism that adopts of industry normally comprises independently adjusting knob, regulate the slip-clutch in control hammer mechanism and the rig structure respectively, with respect to patent US6015017A, this regulative mode is complex structure not only, and complex operation.Therefore, the electric hammer that is disclosed in this patent can realize only just can regulating by an operated key mode of operation of electric hammer, promptly rotate adjustment cam when resting on the different position of rotation as the operator, can make electric hammer be in different mode of operations respectively, just seeming has advantage simple in structure, that ease for use is strong.

But, in the working mode change mechanism of this electric hammer owing to adopted cam structure.Cam is a kind of element higher to processing request, includes relative a high-order portion and a low portion, by high-order portion and low portion and being connected of other elements producing different duties.Therefore, the accuracy of these two parts is had relatively high expectations on the cam, has a little deviation will cause cam and being connected of other elements to go wrong, and can not reach requirement.Therefore, from preparing and being not easy.Simultaneously, the slide bar assembly that the utility model adopted is to extend along the axial direction that is parallel to the cylinder that is positioned at casing, its length almost runs through the inside of whole casing, thereby causes the size of slide bar assembly bigger, and casing inner install narrow and small in the space is difficult for.

For this reason, technique scheme is necessary further improvement in fact.

The utility model content

The purpose of this utility model is to provide a kind of simple in structure, hammer drill type power tool that volume is small and exquisite and easy to operate.

Another purpose of the present utility model is to provide in terms of existing technologies a kind of, can realize the hammer drill type power tool of operating in a key working mode change equally.

For achieving the above object, the utility model discloses a kind of hammer drill type power tool, comprise the hammer mechanism of realizing the hammering function and the rig structure of realizing the boring function, the two motor that all is positioned in the housing drives, and change can transmitting under moment of torsion and the state that disconnects the moment of torsion transmission by the slip-clutch that is provided with separately, described hammer drill type power tool also comprises working mode change mechanism, described working mode change mechanism comprises adjusting knob and shift fork, adjusting knob is connected with the slip-clutch of rig structure, shift fork is connected with the slip-clutch of hammer mechanism, and, adjusting knob and shift fork flexibly connect and shift fork can be positioned under the primary importance and the second place, when shift fork is positioned under the primary importance, hammer mechanism can transmit moment of torsion, and be positioned under the second place when shift fork, hammer mechanism disconnects the moment of torsion transmission and the rig structure can transmit moment of torsion.

As to the replenishing of such scheme, adjusting knob is provided with cam pin, and the slip-clutch of rig structure comprises clutch cover, and clutch cover is connected with cam pin; Shift fork is by being arranged on the pilot pin in the housing and can being arranged on described hammer drill type power tool inside along what the axial direction of pilot pin slided; First terminal and second end that shift fork comprises main body and is positioned at the main body two ends, the slip-clutch of hammer mechanism comprises sliding sleeve, the sliding sleeve and first terminal the connection; First end is tabular, and the connected mode of itself and sliding sleeve is to be formed with cannelure on the sliding sleeve, and first end is inserted in the cannelure; Second end is tabular, and it is inserted between adjusting knob and the clutch cover, and in the vertical direction, and second end is positioned at the top of the cam pin of adjusting knob just.

Adopt this hammer drill type power tool, activity by adjusting knob and shift fork connects relation, thereby can make the operator only operate adjusting knob, just can regulate the slip-clutch of hammer mechanism and rig structure simultaneously, realize the function that just can between multiple mode of operation, change by the single operation key.And in the working mode change mechanism that is adopted, adjusting knob and shift fork simple in structure, volume is small and exquisite, be fit to be applied in the narrow and small casing of volume, thereby the handled easily person uses.

Description of drawings

Fig. 1 is the schematic diagram of hammer drill type power tool in the specific embodiment of the utility model;

Fig. 2 is the partial sectional view of this hammer drill type power tool, analyses and observe the transmission mechanism and the interior motor of a part of motor shell that partly comprise in the inner housing;

Fig. 3 is the stereogram of adjusting knob in this hammer drill type power tool;

Fig. 4 is the partial perspective view of this hammer drill type power tool;

Fig. 5 a is that A among Fig. 4 is to view;

Fig. 5 b is that B among Fig. 4 is to view;

Fig. 6 is the partial sectional view under the drill mode of this hammer drill type power tool;

Fig. 7 is the partial sectional view under the hammering pattern of this hammer drill type power tool;

Partial sectional view under the pattern that Fig. 8 combines for the hammer drill of this hammer drill type power tool;

Wherein, the related elements reference numeral is as follows:

1-housing; 2-drill chuck; 3-handle; 4-cable;

5-motor; 6-hammer mechanism; 7-rig structure; 8-cylinder;

9-adjusting knob; 10-shift fork; 11-inner housing; 12-motor shell;

31-switch; 51-motor drive shaft; 61-crank axle; 62-eccentric shaft;

63-connecting rod; 64-the first gear; 65-sliding sleeve; 651-cannelure;

66a, 66b-end face tooth; 67-spring; 71-jackshaft; 72-the second gear;

73-conical tooth; 74-bevel gear; 75-clutch cover; 76a, 76b-engaging tooth

77a, 77b-engaging tooth; 78-anti-pivoted housing; 79-spring; 81-lance;

82-percussion hammer; 83-piston; 91-cam pin; 100-pilot pin;

101-main body; 102-the first end; 103-the second end.

The specific embodiment

Below in conjunction with drawings and the specific embodiments the utility model is described in further detail.

A kind of hammer drill type power tool is disclosed in the preferred embodiment of the present utility model.This hammer drill type power tool has multiple mode of operation, comprises the pattern that simple hammering pattern, simple drill mode and hammer drill combine at least, and certainly, this hammer drill type power tool can also comprise other additional modes, as angular adjustment etc.The conversion of above-mentioned mode of operation realizes by working mode change mechanism.See also Fig. 1, this working mode change mechanism comprises and is arranged on the outer adjusting knob 9 of casing, and the person regulates in order to handled easily, thereby makes this hammer drill type power tool can be operated under the hammering pattern or under the drill mode or under the pattern that combines of hammer drill.As shown in the figure, these three kinds of mode of operations all adopt the mode of icon to mark on this adjusting knob 9 at least, help operator's identification.

See also Fig. 2, this hammer drill type power tool comprises housing 1.Housing 1 roughly is the L type of counter-rotating, comprises the motor shell 12 that is used to that the inner housing 11 of transmission mechanism is set and is used to be provided with motor 5.And inner housing 11 roughly is vertical angle setting with motor shell 12.The front end of housing 1 (left side is defined as front end among Fig. 2, and the right side is defined as the rear end) is connected with drill chuck 2, is used to install all kinds of drill equipments.The rear end of housing 1 then is connected with the handle 3 that is the D type haply.Handle 3 is provided with switch 31, and it is connected on the power source by cable 4, and the power source here is mainly power supply, thereby switch 31 can open or cut out motor 5.

In motor shell 12, be provided with motor 5 along vertical direction (being as the criterion) with view direction among Fig. 2.Motor 5 comprises the motor drive shaft 51 that has spline, can be used for exporting rotation torque.In inner housing 11, be provided with transmission mechanism.The effect of this transmission mechanism is, will be passed on the drill chuck 2 by the rotation torque of motor 5 outputs and the hammering campaign or the boring that convert drill chuck 2 to is moved.Described transmission mechanism comprises hammer structure 6 and rig structure 7 respectively.When hammer mechanism 6 is connection status and rig structure 7 is off-state simultaneously (connection here or off-state are meant mainly whether the moment of torsion transmission is arranged), this hammer mechanism 6 is after receiving rotation torque, do the hammering campaign, thereby hammer drill type power tool is operated under the hammering pattern; When rig structure 7 was connection status and hammer mechanism 6 is off-state simultaneously, this rig structure 7 was done the boring motion, thereby hammer drill type power tool is operated under the drill mode after receiving rotation torque; When hammer mechanism 6 and rig structure 7 were connection status simultaneously, the rotation torque of motor drive shaft 51 outputs can be passed on hammer mechanism 6 and the rig structure 7 simultaneously, thereby hammer drill type power tool is operated under the pattern that hammer drill combines.

This hammer mechanism 6 comprises the crank axle 61 that is parallel to motor drive shaft 51 settings, is connected with eccentric shaft 62 on crank axle 61, and perhaps, eccentric shaft 62 also can be one-body molded with crank axle 61.Eccentric shaft 62 flexibly connects with the end perpendicular to the connecting rod 63 of eccentric shaft 62 haply, thereby can drivening rod 63 motions.In addition, in inner housing 11, the direction perpendicular to motor drive shaft 51 is provided with cylinder 8 haply, and in cylinder 8, be disposed with lance 81, percussion hammer 82 and piston 83.Wherein, piston 83 is fixedlyed connected with the other end of connecting rod 63.Thereby, when crank axle 61 when rotated, eccentric shaft 62 also will be done eccentric rotation thereupon, and further drivening rod 63 produces along the axial direction of connecting rod 63 and moves back and forth, connecting rod 63 drives piston 83 again and do the piston motion in cylinder 8, and then by percussion hammer 82 and lance 81, the moment of torsion of hammering campaign is passed to drill chuck 2, hammer drill type power tool is operated under the hammering pattern.Need to prove that the cylinder 8 that is adopted in the present embodiment and to be arranged on lance 81, percussion hammer 82 and pistons 83 in the cylinder 8 all are conventional elements in the hammer drill type power seldom elaborates at this.

On this crank axle 61, also be arranged with first gear 64 with gap, this first gear 64 is connected with spline engagement on the motor drive shaft 51.When motor drive shaft 51 output rotation torques, can drive this first gear, 64 rotations, but because this first gear 64 is to be set in a gap on the crank axle 61, so when 64 rotations of first gear, can't drive crank axle 61 rotations.For this reason, also be arranged with slip-clutch on crank axle 61, described slip-clutch comprises with respect to crank axle 61 and being slidingly connected, and the sliding sleeve 65 that can slide along the axial direction of crank axle 61.Sliding sleeve 65 is provided with end face tooth 66a towards the end face of first gear 64, similarly, on the end face of first gear 64, also is provided with end face tooth 66b accordingly.Under the nature, sliding sleeve 65 is positioned at the position of close first gear 64 by spring 67, on this position, end face tooth 66b engagement on the end face tooth 66a on the sliding sleeve 65 and first gear 64 connects, thereby has produced connection between the two, can transmit moment of torsion, promptly when first gear 64 is subjected to drive the generation rotation, by the engagement of end face tooth 66a, 66b, sliding sleeve 65 also will produce rotation thereupon, and drive crank axle 61 rotations further.

If sliding sleeve 65 produces slip along the axial direction of crank axle 61, at this moment, spring 67 will be compressed, and the end face tooth 66b on the end face tooth 66a on the sliding sleeve 65 and first gear 64 will produce disengaging, then 64 meetings of first gear produce idle running on crank axle 61, and do not transmit any moment of torsion.In this case, the state that hammer mechanism 6 integral body are disconnection promptly can't transmit moment of torsion, is operated under the hammering pattern thereby can't drive hammer drill type power tool.

Rig structure 7 comprises the jackshaft 71 that is parallel to this motor drive shaft 51, has been fixedly coupled second gear 72 on jackshaft 71, is used for the rotation torque of motor drive shaft 51 is passed to jackshaft 71.The top of jackshaft 71 forms tapered tooth 73, is bevel gear 74 with 73 engagements of tapered tooth connect.Bevel gear 74 is set in the outside of cylinder 8, and with cylinder 8 for fixedlying connected.When jackshaft 71 rotations, the engagement with bevel gear 74 connects by conical tooth 73, and bevel gear 74 will drive the axial direction generation rotation of cylinder 8 around cylinder 8, thereby hammer drill type power tool is operated under the drill mode.

In the outside of cylinder 8, also be arranged with slip-clutch.Described slip-clutch comprises can be with respect to cylinder 8 and the clutch cover 75 that slides along the axial direction of cylinder 8.The outside of clutch cover 75 is respectively equipped with two groups of engaging tooth 76a, 77a.Corresponding first group of engaging tooth 76a is provided with engaging tooth 76b on bevel gear 74, and by the tension that 79 pairs of clutch covers of the spring that is set in cylinder 8 outsides 75 produce, this a pair of engaging tooth 76a, 76b always are engagement; Corresponding second group of engaging tooth 77a has been fixedly coupled anti-pivoted housing 78 in the inboard of inner housing 11.The inboard of anti-pivoted housing 78 is formed with engaging tooth 77b.By the slip of clutch cover 75, the bevel gear 74 that is connected with a joggle with it can be changed under the state that rotates or prevent to rotate.When clutch cover 75 along the moving axially of cylinder 8, after engaging tooth 77a, 77b being meshing with each other connect, clutch cover 75 is subjected to the restriction of anti-pivoted housing 78 and can't rotates, and then the bevel gear 74 that is connected with a joggle with it also can't be rotated.At this moment, cylinder 8 can not rotate, and hammer drill type power tool can't be operated under the drill mode; And only be connected with a joggle with bevel gear 74 when clutch cover 75, and when breaking away from anti-pivoted housing 78, because clutch cover 75 is not subjected to the restriction of anti-pivoted housing 78, so clutch cover 75 still can be along with bevel gear 74 is together rotated.The hammer drill type power tool of this moment can be operated under the drill mode.

Need to prove, when clutch cover 75 connects with anti-pivoted housing 78 engagements, because rig structure 7 by locked, can't transmit rotation torque.But; because motor drive shaft 51 still has rotation torque output; for avoiding rig structure 7 to damage; second gear 72 has here adopted the common releasing structure of industry; promptly when existing than heavy load; second gear 72 will automatically disconnect and being connected of motor drive shaft 51, and then disconnect the transmission of rotation torque, and whole rig structure 7 is produced effectively protection.The releasing structure here is common by industry, and use is all arranged in various hammer drill type power tools, seldom elaborates at this.

The hammer mechanism 6 in the hammer drill type power tool and the structure of rig structure 7 below have been described respectively, and this structure belongs to comparatively common structure in hammer drill type power tool.And of the present utility model focusing on also comprises working mode change mechanism in hammer drill type power tool.Working mode change mechanism all produces with rig structure 7 with above-mentioned hammer mechanism 6 and is connected, and can be used for regulating above-mentioned hammer mechanism 6 and rig structure 7.See also Fig. 3 and Fig. 4, working mode change mechanism comprises the adjusting knob 9 that is arranged on casing 1 outside and is arranged on shift fork 10 in the inner casing 11.As shown in Figure 3, the inboard of adjusting knob 9 is provided with cam pin 91.The free end of cam pin 91 is connected with clutch cover 75 in the rig structure 7.See also Fig. 5 a, adjusting knob 9 can turn clockwise under the angular range between 0 ° to-180 ° around its axle center, when the operator operates these adjusting knob 9 rotations, cam pin 91 can drive the axial direction slip of clutch cover 75 along cylinder 8, promptly rotate by the off-centre of cam pin 91, drive clutch cover 75 and slide, thereby whether the connection or the disconnection of control rig structure 7 promptly there are moment of torsion to transmit.

See also Fig. 5 a and Fig. 5 b, shift fork 10 slidably is provided with in the inner housing 11 by pilot pin 100, and can slide between the primary importance and the second place along pilot pin 100.First terminal 102 and second end 103 that this shift fork 10 comprises main body 101 and is positioned at main body 101 two ends, wherein, first end 102 is tabular, it is connected perpendicular to the crank axle 61 of hammer mechanism 6 and with sliding sleeve 65, the concrete mode that connects is, be formed with cannelure 651 on sliding sleeve 65, the width of cannelure 651 is greater than the thickness of first end 102, thereby first end 102 can be inserted in the cannelure 651.Second end 103 is tabular, its be parallel to the jackshaft 71 of rig structure 7 and be inserted into adjusting knob 9 and clutch cover 75 between, and in the vertical direction, second end 103 is positioned at the top of the cam pin 91 of adjusting knob 9 just.Thereby when the operator is rotated counterclockwise adjusting knob 9, cam pin 91 will be rotated counterclockwise thereupon.In the rotary course of cam pin 91, it can turn to the below of second end 103 of shift fork 10, continues rotation, and then cam pin 91 can be raised shift fork 10 gradually, makes shift fork 10 be promoted to the second place along pilot pin 100 from primary importance.Lifting along with the main body 101 of shift fork 10, its another end, promptly first end 102 will drive sliding sleeve 65 in the hammer mechanism 6 and promote along the axial direction of crank axle 61, thereby first gear 64 and the sliding sleeve 65 that connect by end face tooth 66a, 66b engagement are originally broken away from, and whole hammer mechanism 6 is off-state.Otherwise, clockwise direction rotation adjusting knob 9, then cam pin 91 no longer plays a supportive role to shift fork 10, shift fork 10 can slide into primary importance again along crank axle 61 under the effect of the spring 67 of hammer mechanism 6, and sliding sleeve 65 in the hammer mechanism 6 and end face tooth 66a, the 66b on first gear 64 are meshed together again, and 6 of whole hammer mechanisms are connection status again.By such mode, in the utility model, only by an adjusting knob 9, just can realize the conversion of the mode of operation of hammer drill type power tool, and the adjusting knob 9 in the working mode change mechanism only comprises cam pin 91, and shift fork 10 also only is positioned at the position near hammer mechanism 6 and rig structure 7, and be not to run through whole housing as the shift fork in the background technology, the structure of therefore described working mode change mechanism is simple relatively, and volume is small and exquisite relatively and easy to use.

See also Fig. 6 to Fig. 8, be hammer drill type power tool of the present utility model three positions of the adjusting knob under three kinds of mode of operations respectively.In Fig. 6, adjusting knob 9 is positioned under drillman's operation mode.The cam pin 91 of adjusting knob 9 is positioned on 0 ° of position, its clutch cover 75 of having regulated in the rig structure 7 only is connected with a joggle with bevel gear 74, and break away from anti-pivoted housing 78, rig structure 7 is connection status, can transmit rotation torque, simultaneously, cam pin 91 also in the vertical direction is raised to the second place with shift fork 10 from primary importance, and sliding sleeve 65 and first gear 64 break away from the hammer mechanism 6 and make.At this moment, spring 67 by compression, the rotation torque of motor drive shaft 51 output is not passed on the crank axle 61, first gear 64 is an idling conditions, hammer mechanism 6 is off-state, and makes hammer drill type power tool be operated in drill mode.

In Fig. 7, adjusting knob 9 is positioned under the hammering mode of operation.The cam pin 91 of adjusting knob 9 is positioned on-180 ° the position, its clutch cover 75 of not only having regulated in the rig structure 7 is connected with a joggle with bevel gear 74, but also be connected with a joggle with anti-pivoted housing 78, simultaneously, cam pin 91 breaks away from shift fork 10, shift fork 10 does not produce the sliding sleeve in the hammer mechanism 6 65 and raises effect, still is in the primary importance place.Like this, sliding sleeve 65 still meshes with first gear 64 under the effect of spring 67.At this moment, spring 67 is tensioning state, and the rotation torque of motor drive shaft 51 outputs is by the engagement of first gear 64 with sliding sleeve 75, and be passed on the crank axle 61, and simultaneously, rig structure 7 is disengaged position, can't transmit rotation torque, and make hammer drill type power tool be operated in the hammering pattern.

In Fig. 8, adjusting knob 9 is positioned under the mode of operation of hammer drill combination.The cam pin 91 of adjusting knob 9 is positioned at roughly on the position that is-120 °.On this position, the clutch cover 75 in the rig structure 7 does not connect with anti-pivoted housing 78 engagements, thereby makes rig structure 7 integral body be connection status, can transmit rotation torque, simultaneously, cam pin 91 also breaks away from shift fork 10, thereby make hammer mechanism 6 integral body also be connection status, can transmit rotation torque.By such mode, hammer drill type power tool is operated under the mode of operation that hammer drill combines.

The foregoing description has provided hammer drill type power tool in conjunction with the accompanying drawings and has been operated in three kinds of user modes under the mode of operation, but the utility model is not limited only to described three kinds of mode of operations, can also comprise other mode of operations, realize but the conversion between these mode of operations is the working mode change mechanism that adopts by the utility model equally.

Claims (6)

1, a kind of hammer drill type power tool, comprise the hammer mechanism (6) of realizing the hammering function and the rig structure (7) of realizing the boring function, the two motor (5) that all is positioned in the housing (1) drives, and change can transmitting under moment of torsion and the state that disconnects the moment of torsion transmission by the slip-clutch that is provided with separately, it is characterized in that: described hammer drill type power tool also comprises working mode change mechanism, described working mode change mechanism comprises adjusting knob (9) and shift fork (10), adjusting knob (9) is connected with the slip-clutch of rig structure (7), shift fork (10) is connected with the slip-clutch of hammer mechanism (6), and, adjusting knob (9) flexibly connects with shift fork (10) and shift fork (10) can be positioned under the primary importance and the second place, when shift fork (10) is positioned under the primary importance, hammer mechanism (6) can transmit moment of torsion, and be positioned under the second place when shift fork (10), hammer mechanism (6) disconnects the moment of torsion transmission and rig structure (7) can transmit moment of torsion.

2, hammer drill type power tool as claimed in claim 1 is characterized in that: adjusting knob (9) is provided with cam pin (91), and the slip-clutch of rig structure (7) comprises clutch cover (75), and clutch cover (75) is connected with cam pin (91).

3, hammer drill type power tool as claimed in claim 2 is characterized in that: shift fork (10) by be arranged on the pilot pin (100) in the housing (1) and can slide along the axial direction of pilot pin (100) be arranged on described hammer drill type power tool inside.

4, hammer drill type power tool as claimed in claim 3, it is characterized in that: first end (102) and second end (103) that shift fork (10) comprises main body (101) and is positioned at main body (101) two ends, the slip-clutch of hammer mechanism (6) comprises sliding sleeve (65), and sliding sleeve (65) is connected with first end (102).

5, hammer drill type power tool as claimed in claim 4, it is characterized in that: first end (102) is tabular, the connected mode of itself and sliding sleeve (65) is to be formed with cannelure (651) on the sliding sleeve (65), and first end (102) is inserted in the cannelure (651).

6, hammer drill type power tool as claimed in claim 5, it is characterized in that: second end (103) is tabular, it is inserted between adjusting knob (9) and the clutch cover (75), and in the vertical direction, and second end (103) is positioned at the top of the cam pin (91) of adjusting knob (9) just.

Images