CN102975174B - Transmission switching device of electric hammer - Google Patents
Transmission switching device of electric hammer Download PDFInfo
- Publication number
- CN102975174B CN102975174B CN201210531228.4A CN201210531228A CN102975174B CN 102975174 B CN102975174 B CN 102975174B CN 201210531228 A CN201210531228 A CN 201210531228A CN 102975174 B CN102975174 B CN 102975174B
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- bearing
- shifting part
- gear
- axle sleeve
- jackshaft
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
- B25D11/062—Means for driving the impulse member comprising a wobbling mechanism, swash plate
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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
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Percussive Tools And Related Accessories (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a transmission switching device of an electric hammer, and the device comprises an intermediate shaft; an intermediate shaft gear, a transmission gear, swing rod bearings and an intermediate shaft sleeve are arranged on the intermediate shaft; a connecting part extends outwards from the transmission gear; the connecting part is sleeved on one end of the intermediate shaft sleeve; the swing rod bearings are respectively sleeved on the connecting part and the intermediate shaft sleeve; keyway matching structures are arranged between the other end of the intermediate shaft sleeve and the intermediate shaft, the connecting part and the swing rod bearings; a shift bearing is arranged on the peripheral side of the intermediate shaft sleeve; the inner ring of the shift bearing is the intermediate shaft sleeve, and a groove is arranged on the outer ring of the shift bearing; and a shifting mechanism is connected into the groove. The transmission switching device of the electric hammer has the beneficial effects that a transmission mechanism and the shifting mechanism stay still relatively, no friction, wear, heating or oil leakage occurs, the service life is long, the maintenance amount is small, the gear friction phenomenon is overcome, and the working efficiency is high.
Description
Technical field
The present invention relates to a kind of electric hammer, particularly relate to and be a kind ofly located in electric hammer, for the transmission switching mechanism making electric hammer complete impact and bore operation.
Background technology
Chinese utility model patent (the patent No.: disclose a kind of transmission mechanism for electric tool 201120173533.1), it comprises: the axle driven by the driving mechanism of electric tool, the drive division comprising the first axle part, the second axle part and be arranged between the first axle part and the second axle part; Be installed on the gear of the first axle part, gear slides relative to the bearing of trend of the first axle part along axle, is provided with the actuator cooperatively interacted between gear and the drive division of axle; Be installed on the Oscillating lever bearing of the second axle part, Oscillating lever bearing comprises inner ring and outer ring, and the raceway between inner ring and outer ring is obliquely installed relative to the second axle part, is provided with the actuator cooperatively interacted between inner ring and drive division, outer ring is provided with fork, and fork extends in the inclined plane at slideway place.
In the structure of this transmission mechanism of electric tool, jackshaft is split-type structural, namely jackshaft is coaxially set together by the first axle part and the second axle part and is formed, concave-convex fit structure is provided with between the end that these two axle portions are mutually close, utilize concave-convex fit structure to be combined together, make power realize transmitting between the first axle part and the second axle part.On the first axle part, circumference is socketed with gear regularly, and the fork shift mechanism in transmission mechanism directly realizes connecting of contact with gear, so that fork shift mechanism handsetting gear slides axially on the first axle part.With the electric tool of this transmission mechanism when realizing bore operation, gear is rotating as main drive disk assembly always, and to realize with gear the fork shift mechanism that contact connects be geo-stationary, a large amount of heat is produced because of friction between fork shift mechanism and gear, these frictional heats can cause the lubricating oil temperature in electric tool to raise, and the flowing of lubricating oil can make electric tool bulk temperature raise.This one side easily makes the shell body of plastics produce distortion, and also can ring the sealing effectiveness arriving electric tool entirety by scape on the other hand, easily occur the seepage of lubricating oil, after using a period of time, electric hammer surface is easily dirty.In addition, shifter contacts with direct geared, and after long-term work, serious wear between the two, not only needs often to change consumable accessory, and this also can have influence on the sensitivity of fork shift institution staff.
Summary of the invention
For overcoming above-mentioned defect, the technical issues that need to address of the present invention: the transmission switching device shifter providing a kind of electric hammer, the application of this transmission switching device shifter effectively can improve the functional reliability of electric hammer.
For solveing the technical problem, technical scheme of the present invention: a kind of transmission switching device shifter of electric hammer, comprise transmission mechanism, shifter and the knob be connected with gearshift, transmission mechanism comprises jackshaft, jackshaft is provided with countershaft-gear, one end of jackshaft is provided with travelling gear, jackshaft is provided with Oscillating lever bearing between travelling gear and countershaft-gear, described jackshaft gap between travelling gear and countershaft-gear is socketed with middle axle sleeve, travelling gear stretches out connecting portion near the side facing epitaxy of countershaft-gear, connecting portion is socketed in one end outer circumferential side of middle axle sleeve away from countershaft-gear with gap, Oscillating lever bearing is socketed in the outer circumferential side of connecting portion with gap near one end of travelling gear, the Oscillating lever bearing other end is socketed in jackshaft with gap and puts, between the inner peripheral surface of the middle axle sleeve other end and jackshaft, between middle axle sleeve one end outer peripheral face and the inner peripheral surface of connecting portion and be equipped with the keyway fit structure cooperatively interacted between Oscillating lever bearing other end inner peripheral surface and middle axle sleeve, middle axle sleeve other end outer circumferential side is provided with displacement bearing, displacement bearing inner race is middle axle sleeve, displacement bearing outer ring is provided with groove, described gearshift is connected in this groove.In electric hammer, gear wheel is connected with countershaft-gear, drill bit shaft respectively, and gear wheel can drive drill bit shaft to rotate, and makes electric hammer realize drill mode; Fork on Oscillating lever bearing is tilting relative to the axis of Oscillating lever bearing, and fork is connected on the cylinder rod that is connected with electric hammer drill axle, and the rotation of Oscillating lever bearing, pulls cylinder action, thus realizes the conflicting model of electric hammer.Knob rotates the displacement action produced makes middle axle sleeve move around the connected mode changed in transmission mechanism along jackshaft by shifter, thus realizes electric hammer and switch between conflicting model, drill mode, conflicting model these three kinds of mode of operations synchronous with drill mode.The connection of contact is realized between shifter and displacement bearing, no matter whether middle axle sleeve is in rotation, keeps geo-stationary, thus do not have friction, wearing and tearing between the outer ring of shifter and displacement bearing, also would not generate heat, fundamentally overcome problems of the prior art.
As preferably, the outer ring of described displacement bearing is axially protruding along jackshaft, and the gap between the inner peripheral surface of this extension of outer ring and middle axle sleeve outer peripheral face is much smaller than the diameter of ball, and described groove is positioned on the outer peripheral face of this extension.This makes the outer ring of displacement bearing relatively large, is convenient to arrange on outer ring for structure joining with fork shift mechanism.The good stability of displacement bearing on jackshaft cover, in middle axle sleeve rotation process, the outer ring in displacement bearing can keep good positional stability.
As preferably, the internal diameter of the described middle axle sleeve other end is less than the external diameter of countershaft-gear, and the external diameter of displacement bearing is greater than Oscillating lever bearing other end internal diameter.What be convenient to that jackshaft is enclosed within when jackshaft axially moves around is spacing.
Keyway fit structure both can be singly-bound fit structure, also can be double bond fit structure, also can be cotter way fit structure, and as preferably, described keyway fit structure is spline fitted structure.Spline fitted structure is convenient to the switching of connected mode between key and groove, is also conducive to the stationarity of transmission.
As preferably, described connecting portion inner peripheral surface spline structure inner end end face to the distance of the spline structure outer face of Oscillating lever bearing other end inner peripheral surface is less than spline structure that connecting portion inner peripheral surface spline structure inner end end face to middle axle sleeve and Oscillating lever bearing the match ultimate range near the end face of connecting portion one end, and the spacing between the both ends of the surface that two spline structures on middle axle sleeve outer peripheral face are relative is greater than the length of the spline structure on Oscillating lever bearing.Like this when jackshaft cover move to abut against with countershaft-gear time, can guarantee to throw off spline joint between Oscillating lever bearing and middle axle sleeve, make electric hammer can realize simple drill mode.
As preferably, described connecting portion inner peripheral surface spline structure inner end end face to the minimum range of middle axle sleeve other end end face is less than connecting portion inner peripheral surface spline structure inner end end face to one end end face of jackshaft spline structure near connecting portion.Like this when jackshaft cover move to abut against with Oscillating lever bearing time, can guarantee to throw off spline joint between middle axle sleeve and jackshaft, make electric hammer can realize simple conflicting model.
As preferably, described Oscillating lever bearing is provided with location bearing in the side near travelling gear, and the inner ring of Oscillating lever bearing and the inner ring of location bearing are connected as a single entity, and the outer ring of location bearing extends outward location-plate, and location-plate is fixedly connected with the positioning seat of electric hammer.Location bearing with Oscillating lever bearing altogether inner ring is set outside Oscillating lever bearing again, makes Oscillating lever bearing can obtain circumferential rotatable shaft to can the function of effective location.
As preferably, described gearshift comprises the first shifting part, the second shifting part, shackle member, bearing pin and spring, bearing pin and jackshaft are arranged in parallel, and sidewall is extended respectively to side in the two ends of the first shifting part, the second shifting part, make the first shifting part, the second shifting part entirety all in "
" shape, bearing pin is respectively with gap through the first shifting part, the two side of the second shifting part, one sidewall of the first shifting part is between the two side of the second shifting part, another sidewall of first shifting part is positioned at the outside of the second shifting part one sidewall, be socketed on bearing pin gapping of spring, one end of spring is connected on a sidewall of the first shifting part, the other end of spring is connected on a sidewall of the second shifting part, one end of shackle member is socketed on bearing pin with gap, the other end of shackle member is provided with the fork-shaped pin with recess, the clamping of fork-shaped pin in a groove, shackle member is between another sidewall of the first shifting part and the second shifting part one sidewall, first shifting part extends first group of pin of " L " shape to another side-wall outer side, second shifting part extends second group of pin of " N " shape to a side-wall outer side, the driving lever that described knob is biased is connected between first group of pin and second group of pin.Rotate the driving lever generation displacement that knob makes to be biased, the displacement of driving lever is all pass to shackle member by spring to promote middle axle sleeve and axially move around along jackshaft, annexation between the spline fitted structure changing the spline structure that puts of jackshaft and jackshaft, Oscillating lever bearing, connecting portion, thus realize boring, hammer, to bore but also the function of hammer not only.Because the elastic force of spring is better handling, response speed is very quick, middle axle sleeve action can be promoted instantaneously, biting teeth phenomenon is there will not be when spline fitted structure recovery is engaged, the service life of each counterpart can be extended, also make manually to adjust without the need to operating personnel during gearshift simultaneously, can operating efficiency be improved, guarantee the personal safety of operating personnel.
As preferably, described bearing pin is also provided with keeper between a sidewall and another sidewall of the second shifting part of the first shifting part, and one end of keeper is socketed on bearing pin with gap, and the other end of keeper is provided with the serrate slot matched with countershaft-gear profile of tooth.Electric hammer is when being in the state of hammer, and the serrate slot on keeper is meshed with countershaft-gear, guarantees that countershaft-gear can not rotate, and improves work quality.
Therefore, beneficial effect of the present invention: one, due to idler gear in transmission process can not and fork shift mechanism between produce and rub, the frictional heat that clutch shaft bearing produces in rotation process is little, when electric hammer is with the work pattern of boring, a large amount of heat can not be produced in the inside of electric hammer, this contributes to the maintenance of electric hammer plastic casing body, and electric hammer entirety is not easily hot.Because lubricating oil can not promote higher temperature in the electric hammer course of work, the sealing property of the inner liquid sealing structure of electric hammer can not be subject to larger impact, not easily there is leakage of oil in electric hammer, this effectively can improve the service life of electric hammer, do not need often to keep in repair electric hammer.Fork shift mechanism can not produce with idler gear and rub in the electric hammer course of work, and the wear extent of fork shift mechanism is little, thus effectively can ensure the work sensitivity of fork shift mechanism.
Two, structure is simple, reasonable in design, easily manufactured, can realize electric hammer gear shift without the need to electric hammer stall, not only can avoid the generation of beating tooth phenomenon, and ensure the personal safety of operating personnel, raise labour productivity and work quality.
Accompanying drawing explanation
Fig. 1 is the electric hammer cross-sectional schematic with this transmission switching device shifter;
Fig. 2 is the schematic perspective view of this transmission switching device shifter;
Fig. 3 is transmission mechanism cross-sectional schematic of the present invention.
In figure: transmission mechanism 1, shifter 2, positioning seat 3, jackshaft 4, countershaft-gear 5, displacement bearing 6, middle axle sleeve 7, Oscillating lever bearing 8, location bearing 9, travelling gear 10, bearing pin 11, first group of pin 12, fork-shaped pin 13, second group of pin 14, shackle member 15, first shifting part 16, spring 17, second shifting part 18, keeper 19, serrate slot 20, groove 21, connecting portion 22, location-plate 23, extension 24.
Detailed description of the invention
Below by preferred embodiment, and in conjunction with Figure of description, technical scheme of the present invention is further described in detail:
Embodiment: as shown in Figure 1, the transmission switching device shifter of electric hammer of the present invention is arranged in electric hammer, the knob (not shown) comprising transmission mechanism 1, shifter 2 and be connected with shifter 2.
As Fig. 2, shown in Fig. 3, transmission mechanism 1 comprises jackshaft 4, jackshaft 4 is provided with the countershaft-gear 5 be connected as a single entity with jackshaft 4, one end of jackshaft 4 is provided with travelling gear 10, jackshaft 4 is provided with Oscillating lever bearing 8 between travelling gear 10 and countershaft-gear 5, described jackshaft 4 gap between travelling gear 10 and countershaft-gear 5 is socketed with middle axle sleeve 7, travelling gear 10 stretches out connecting portion 22 near the side facing epitaxy of countershaft-gear 5, connecting portion 22 is socketed in one end outer circumferential side of middle axle sleeve 7 away from countershaft-gear 5 with gap, Oscillating lever bearing 8 is socketed in the outer circumferential side of connecting portion 22 with gap near one end of travelling gear 10, Oscillating lever bearing 8 other end is socketed on middle axle sleeve 7 with gap, between the inner peripheral surface of middle axle sleeve 7 other end and jackshaft 4, between middle axle sleeve 7 one end outer peripheral face and the inner peripheral surface of connecting portion 22 and be equipped with the spline fitted structure cooperatively interacted between Oscillating lever bearing 8 other end inner peripheral surface and middle axle sleeve 7, connecting portion 22 inner peripheral surface spline structure inner end end face to the distance of the spline structure outer face of Oscillating lever bearing 8 other end inner peripheral surface is less than spline structure that connecting portion 22 inner peripheral surface spline structure inner end end face to middle axle sleeve 7 and Oscillating lever bearing 8 the match ultimate range near the end face of connecting portion 22 one end, spacing between the both ends of the surface that two spline structures on middle axle sleeve 7 outer peripheral face are relative is greater than the length of the spline structure on Oscillating lever bearing 8, connecting portion 22 inner peripheral surface spline structure inner end end face to the minimum range of middle axle sleeve 7 other end end face is less than connecting portion 22 inner peripheral surface spline structure inner end end face to one end end face of jackshaft 4 spline structure near connecting portion 22, the internal diameter of middle axle sleeve 7 other end is less than the external diameter of countershaft-gear 5, middle axle sleeve 7 other end outer circumferential side is provided with displacement bearing 6, displacement bearing 6 inner ring is middle axle sleeve 7, the outer ring of described displacement bearing 6 is axially stretched out to Oscillating lever bearing 8 side along jackshaft 4, gap between the inner peripheral surface of this extension 24 of outer ring and middle axle sleeve 7 outer peripheral face is much smaller than the diameter of ball, the external diameter of displacement bearing 6 is greater than Oscillating lever bearing 8 other end internal diameter, described groove 21 is positioned on the outer peripheral face of this extension 24.
As shown in Figure 2, described gearshift comprises the first shifting part 16, second shifting part 18, shackle member 15, bearing pin 11 and spring 17, bearing pin 11 and jackshaft 4 are arranged in parallel, sidewall is extended respectively to side in the two ends of the first shifting part 16, second shifting part 18, make the first shifting part 16, second shifting part 18 entirety all in "
" shape, bearing pin 11 is respectively with gap through the first shifting part 16, the two side of the second shifting part 18, one sidewall of the first shifting part 16 is between the two side of the second shifting part 18, another sidewall of first shifting part 16 is positioned at the outside of the second shifting part 18 1 sidewall, spring 17 is socketed on bearing pin 11 with gap, one end of spring 17 is connected on a sidewall of the first shifting part 16, the other end of spring 17 is connected on a sidewall of the second shifting part 18, one end of shackle member 15 is socketed on bearing pin 11 with gap, the other end of shackle member 15 is provided with the fork-shaped pin 13 matched with groove 21, fork-shaped pin 13 is connected in groove 21, shackle member 15 is between first another sidewall of shifting part 16 and the second shifting part 18 1 sidewall, first shifting part 16 extends first group of pin 12 of " L " shape to another side-wall outer side, second shifting part 18 extends second group of pin 14 of " N " shape to a side-wall outer side, the driving lever that described knob is biased is connected between first group of pin 12 and second group of pin 14.Bearing pin 11 is also provided with keeper 19 between a sidewall and second another sidewall of shifting part 18 of the first shifting part 16, and one end of keeper 19 is socketed on bearing pin 11 with gap, and the other end of keeper 19 is provided with the serrate slot 20 matched with countershaft-gear 5 profile of tooth.
As shown in Figure 1, Figure 2, Figure 3 shows, Oscillating lever bearing 8 is provided with location bearing 9 in the side near travelling gear 10, the inner ring of Oscillating lever bearing 8 and the inner ring of location bearing 9 are connected as a single entity, and the outer ring of location bearing 9 extends outward location-plate 23, and location-plate 23 is fixedly connected with the positioning seat 3 of electric hammer.
In electric hammer, countershaft-gear 5 is meshed with the gear wheel be fixedly connected on electric hammer drill axle, and the fork on Oscillating lever bearing 8 and the cylinders be connected on electric hammer drill axle connect.
The transmission switching device shifter operation principle of electric hammer is: rotate the driving lever generation displacement that knob makes to be biased, the first group of pin 12 that be displaced through that driving lever produces passes to the first shifting part 16, first shifting part 16 passes to the second shifting part 18 by spring 17, second shifting part 18 passes to fork-shaped pin 13 by shackle member 15, fork-shaped pin 13 is connected in the groove 21 of displacement bearing 6, thus axle sleeve 7 moves towards Oscillating lever bearing 8 side in the middle of promoting, keeper 19 moves in the same way with middle axle sleeve 7 under the drive of the second shifting part 18 simultaneously.Or, the second group of pin 14 that be displaced through that driving lever produces passes to the second shifting part 18, second shifting part 18 passes to the first shifting part 16 by spring 17, first shifting part 16 passes to fork-shaped pin 13 by shackle member 15, fork-shaped pin 13 is connected in the groove 21 of displacement bearing 6, thus axle sleeve 7 moves towards countershaft-gear 5 side in the middle of promoting, keeper 19 moves in the same way with middle axle sleeve 7 under the drive of the first shifting part 16 simultaneously.When jackshaft cover 7 move to abut against with Oscillating lever bearing 8 time, spline joint is thrown off between middle axle sleeve 7 and jackshaft 4, serrate slot 20 on keeper 19 is meshed with countershaft-gear 5, middle axle sleeve 7 only keeps engagement with Oscillating lever bearing 8, both travelling gears 10, the power of such travelling gear 10 just only passes to Oscillating lever bearing 8, and the fork on Oscillating lever bearing 8 promotes electric hammer drill axle and realizes simple conflicting model; When jackshaft cover 7 move to abut against with countershaft-gear 5 time, spline joint is thrown off between Oscillating lever bearing 8 and middle axle sleeve 7, serrate slot 20 on keeper 19 is also disengaged from engagement status with countershaft-gear 5, middle axle sleeve 7 only keeps engagement with jackshaft 4, both travelling gears 10, the power of such travelling gear 10 just only passes to jackshaft 4, jackshaft 4 passes to the gear wheel be meshed with countershaft-gear 5 by countershaft-gear 5, the rotation forces electric hammer drill axle of gear wheel realizes simple drill mode; When jackshaft cover 7 mediates state, middle axle sleeve 7 is all in engagement with jackshaft 4, Oscillating lever bearing 8, travelling gear 10 respectively, serrate slot on keeper 19 20 and countershaft-gear 5 are in disengaged condition, make electric hammer drill axle can realize hammering into shape not only but also drill jig formula like this.In addition, when middle axle sleeve 7 rotates, displacement bearing 6 outer ring keeps and fork-shaped pin 13 geo-stationary.
Above-described embodiment is a kind of preferred version of the present invention, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
The content be not described in detail in this description, belongs to the known prior art of those skilled in the art.
Claims (8)
1. the transmission switching device shifter of an electric hammer, comprise transmission mechanism, shifter and the knob be connected with gearshift, transmission mechanism comprises jackshaft, jackshaft is provided with countershaft-gear, one end of jackshaft is provided with travelling gear, jackshaft is provided with Oscillating lever bearing between travelling gear and countershaft-gear, it is characterized in that: described jackshaft gap between travelling gear and countershaft-gear is socketed with middle axle sleeve, travelling gear stretches out connecting portion near the side facing epitaxy of countershaft-gear, connecting portion is socketed in one end outer circumferential side of middle axle sleeve away from countershaft-gear with gap, Oscillating lever bearing is socketed in the outer circumferential side of connecting portion with gap near one end of travelling gear, the Oscillating lever bearing other end is socketed in jackshaft with gap and puts, between the inner peripheral surface of the middle axle sleeve other end and jackshaft, between middle axle sleeve one end outer peripheral face and the inner peripheral surface of connecting portion and be equipped with the keyway fit structure cooperatively interacted between Oscillating lever bearing other end inner peripheral surface and middle axle sleeve, middle axle sleeve other end outer circumferential side is provided with displacement bearing, displacement bearing inner race is middle axle sleeve, displacement bearing outer ring is provided with groove, described gearshift is connected in this groove, the outer ring of described displacement bearing is axially protruding along jackshaft, gap between the inner peripheral surface of this extension of outer ring and middle axle sleeve outer peripheral face is much smaller than the diameter of ball, described groove is positioned on the outer peripheral face of this extension.
2. the transmission switching device shifter of electric hammer according to claim 1, is characterized in that: the internal diameter of the described middle axle sleeve other end is less than the external diameter of countershaft-gear, and the external diameter of displacement bearing is greater than Oscillating lever bearing other end internal diameter.
3. the transmission switching device shifter of electric hammer according to claim 1 and 2, is characterized in that: described keyway fit structure is spline fitted structure.
4. the transmission switching device shifter of electric hammer according to claim 3, it is characterized in that: described connecting portion inner peripheral surface spline structure inner end end face to the distance of the spline structure outer face of Oscillating lever bearing other end inner peripheral surface is less than spline structure that connecting portion inner peripheral surface spline structure inner end end face to middle axle sleeve and Oscillating lever bearing the match ultimate range near the end face of connecting portion one end, and the spacing between the both ends of the surface that two spline structures on middle axle sleeve outer peripheral face are relative is greater than the length of the spline structure on Oscillating lever bearing.
5. the transmission switching device shifter of electric hammer according to claim 3, is characterized in that: described connecting portion inner peripheral surface spline structure inner end end face to the minimum range of middle axle sleeve other end end face is less than connecting portion inner peripheral surface spline structure inner end end face to one end end face of jackshaft spline structure near connecting portion.
6. the transmission switching device shifter of electric hammer according to claim 1, it is characterized in that: described Oscillating lever bearing is provided with location bearing in the side near travelling gear, the inner ring of Oscillating lever bearing and the inner ring of location bearing are connected as a single entity, the outer ring of location bearing extends outward location-plate, and location-plate is fixedly connected with the positioning seat of electric hammer.
7. the transmission switching device shifter of the electric hammer according to claim 1 or 2 or 6, it is characterized in that: described gearshift comprises the first shifting part, the second shifting part, shackle member, bearing pin and spring, bearing pin and jackshaft are arranged in parallel, sidewall is extended respectively to side in the two ends of the first shifting part, the second shifting part, make the first shifting part, the second shifting part entirety all in "
" shape, bearing pin is respectively with gap through the first shifting part, the two side of the second shifting part, one sidewall of the first shifting part is between the two side of the second shifting part, another sidewall of first shifting part is positioned at the outside of the second shifting part one sidewall, be socketed on bearing pin gapping of spring, one end of spring is connected on a sidewall of the first shifting part, the other end of spring is connected on a sidewall of the second shifting part, one end of shackle member is socketed on bearing pin with gap, the other end of shackle member is provided with the fork-shaped pin with recess, the clamping of fork-shaped pin in a groove, shackle member is between another sidewall of the first shifting part and the second shifting part one sidewall, first shifting part extends first group of pin of " L " shape to another side-wall outer side, second shifting part extends second group of pin of " N " shape to a side-wall outer side, the driving lever that described knob is biased is connected between first group of pin and second group of pin.
8. the transmission switching device shifter of electric hammer according to claim 7, it is characterized in that: described bearing pin is also provided with keeper between a sidewall and another sidewall of the second shifting part of the first shifting part, one end of keeper is socketed on bearing pin with gap, and the other end of keeper is provided with the serrate slot matched with countershaft-gear profile of tooth.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210531228.4A CN102975174B (en) | 2012-12-11 | 2012-12-11 | Transmission switching device of electric hammer |
| PCT/CN2013/085366 WO2014090041A1 (en) | 2012-12-11 | 2013-10-17 | Transmission switching device of electric hammer |
| EP13840136.9A EP2767367B1 (en) | 2012-12-11 | 2013-10-17 | Transmission switching device of electric hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210531228.4A CN102975174B (en) | 2012-12-11 | 2012-12-11 | Transmission switching device of electric hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102975174A CN102975174A (en) | 2013-03-20 |
| CN102975174B true CN102975174B (en) | 2015-07-08 |
Family
ID=47849670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210531228.4A Active CN102975174B (en) | 2012-12-11 | 2012-12-11 | Transmission switching device of electric hammer |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2767367B1 (en) |
| CN (1) | CN102975174B (en) |
| WO (1) | WO2014090041A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975174B (en) * | 2012-12-11 | 2015-07-08 | 浙江奔宇工具有限公司 | Transmission switching device of electric hammer |
| CN104455396B (en) * | 2014-11-17 | 2016-08-24 | 张家港市创基机械设备制造有限公司 | Shifter in four function electric hammers |
| CN104455397B (en) * | 2014-11-17 | 2016-09-14 | 张家港市创基机械设备制造有限公司 | Shifter in three function electric hammer |
| CN104942762A (en) * | 2015-06-05 | 2015-09-30 | 吴志明 | Electric hammer |
| CN107627263B (en) * | 2017-09-30 | 2023-11-10 | 苏州宝时得电动工具有限公司 | Electric hammer |
| CN107891402A (en) * | 2018-01-03 | 2018-04-10 | 尚才平 | The gearshift of three function electric hammer |
| CN109555792B (en) * | 2018-12-05 | 2023-10-13 | 浙江亚特电器股份有限公司 | Electric hammer clutch device |
| CN112296946B (en) * | 2019-07-23 | 2022-03-18 | 南京德朔实业有限公司 | Electric hammer |
| CN115199739A (en) * | 2022-05-27 | 2022-10-18 | 浙江东立电器有限公司 | Gear adjusting device |
| CN115045995A (en) * | 2022-05-27 | 2022-09-13 | 浙江东立电器有限公司 | Gear adjusting device and adjusting method thereof |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2820128A1 (en) * | 1978-05-09 | 1979-11-22 | Bosch Gmbh Robert | CRAFT MACHINE |
| DE3039669A1 (en) * | 1980-10-21 | 1982-05-27 | Robert Bosch Gmbh, 7000 Stuttgart | DRILLING HAMMER |
| DE3819125A1 (en) * | 1988-06-04 | 1989-12-14 | Bosch Gmbh Robert | DRILLING HAMMER |
| JPH07328954A (en) * | 1994-06-09 | 1995-12-19 | Hitachi Koki Co Ltd | Hammer drill |
| DE10355812A1 (en) * | 2003-11-28 | 2005-06-09 | Robert Bosch Gmbh | Power tool |
| CN2707439Y (en) * | 2004-05-25 | 2005-07-06 | 铁鎯电动工具有限公司 | Three-function light electric hammer |
| DE102004026845A1 (en) * | 2004-06-02 | 2005-12-22 | Robert Bosch Gmbh | Hand tool, in particular drill and / or percussion hammer |
| DE102004058686A1 (en) * | 2004-09-03 | 2006-03-09 | Robert Bosch Gmbh | Power tool with a drive that can be switched over between the operating modes drilling, impact drilling, and chiseling |
| DE102005056205A1 (en) * | 2005-11-25 | 2007-06-06 | Robert Bosch Gmbh | Rotary hammer with three operating modes |
| DE102006027116A1 (en) * | 2006-06-12 | 2007-12-13 | Robert Bosch Gmbh | Electric hand tool e.g. boring and/or striking hammer, has intermediate shaft of electrical motor driving work spindle and/or drive of striking mechanism, and gear and coupling device exhibiting angular gear as gear |
| CN1899772A (en) * | 2006-07-25 | 2007-01-24 | 常州赛迪电气制造有限公司 | Multifunctional electric hammer |
| DE102010002672A1 (en) * | 2010-03-09 | 2011-09-15 | Robert Bosch Gmbh | hammer drill device |
| CN202129475U (en) * | 2011-05-19 | 2012-02-01 | 博世电动工具（中国）有限公司 | Electric tool and transmission mechanism thereof |
| CN102794751B (en) * | 2011-05-23 | 2017-02-01 | 博世电动工具（中国）有限公司 | Electric tool and transmission switching mechanism thereof |
| CN202318260U (en) * | 2011-05-23 | 2012-07-11 | 博世电动工具（中国）有限公司 | Electric tool and transmission switching mechanism thereof |
| CN102975174B (en) * | 2012-12-11 | 2015-07-08 | 浙江奔宇工具有限公司 | Transmission switching device of electric hammer |
| CN203045678U (en) * | 2012-12-11 | 2013-07-10 | 浙江奔宇工具有限公司 | Transmission switching device of electric hammer |
-
2012
- 2012-12-11 CN CN201210531228.4A patent/CN102975174B/en active Active
-
2013
- 2013-10-17 WO PCT/CN2013/085366 patent/WO2014090041A1/en active Application Filing
- 2013-10-17 EP EP13840136.9A patent/EP2767367B1/en not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| EP2767367A4 (en) | 2015-10-14 |
| WO2014090041A1 (en) | 2014-06-19 |
| EP2767367B1 (en) | 2016-12-07 |
| CN102975174A (en) | 2013-03-20 |
| EP2767367A1 (en) | 2014-08-20 |
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