CN102837295A - Electric hammer drive mechanism - Google Patents
Electric hammer drive mechanism Download PDFInfo
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- CN102837295A CN102837295A CN2012103737398A CN201210373739A CN102837295A CN 102837295 A CN102837295 A CN 102837295A CN 2012103737398 A CN2012103737398 A CN 2012103737398A CN 201210373739 A CN201210373739 A CN 201210373739A CN 102837295 A CN102837295 A CN 102837295A
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- plectrum
- electric hammer
- jackshaft
- otic placode
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Abstract
The invention discloses an electric hammer drive mechanism, which solves the problems that the traditional electric hammer is easy to deform and the lubricating oil is easy to leak in the working process. The technical scheme of the invention is as follows: the electric hammer drive mechanism is provided with a large gear, an intermediate gear, an intermediate shaft and a clutch gear, wherein the large gear is engaged with the intermediate gear, both the intermediate gear and the clutch gear are respectively sleeved on the intermediate shaft in a sliding way, a key slot matching structure is respectively arranged between the clutch gear and the intermediate shaft as well as between the intermediate gear and the intermediate shaft, the key slot matching structures are mutually matched, a shifting mechanism is respectively connected with the clutch gear and the intermediate gear, the size of the key slot matching structure between the intermediate gear and the intermediate shaft along the axial direction of the intermediate shaft is smaller than the length of each tooth on the intermediate gear, the intermediate gear is provided with a first bearing, an inner ring of the first bearing is an intermediate gear, an outer ring of the first bearing is provided with a groove, and the shifting mechanism is connected into the groove.
Description
Technical field
The present invention relates to a kind of electric hammer, relate in particular to a kind of being located in the electric hammer, be used to make electric hammer to accomplish the transmission mechanism of impact and bore operation.
Background technology
China's utility model patent (patent No.: disclose a kind of transmission mechanism that is used for electric tool 201120173533.1); It comprises: by the axle of the drive mechanism of electric tool, comprise the first axle part, the second axle part and be arranged at the first axle part and the second axle part between drive division; Be installed on the gear of the first axle part, gear slides with respect to the bearing of trend of the first axle part along axle, is provided with the actuator that cooperatively interacts between the drive division of gear and 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 the outer ring is obliquely installed with respect to the second axle part, is provided with the actuator that cooperatively interacts between inner ring and the drive division; On the outer ring, be provided with fork, fork extends in the inclined plane at slideway place.The invention still further relates to a kind ofly comprise the electric tool of aforementioned transmission mechanism, especially electric hammer bores.
In the structure of this electric tool transmission mechanism; Jackshaft is a split-type structural; Be jackshaft by the first axle part and coaxial being set together of the second axle part and constitute; These two axial regions near the end between be provided with concavo-convex fit structure, utilize concavo-convex fit structure to be combined together, make power between the first axle part and the second axle part, realize transmitting.On the first axle part, circumferentially be socketed with gear regularly, the fork shift mechanism in the transmission mechanism directly realizes connecting of contact with gear, so that fork shift mechanism handsetting gear endwisely slips on the first axle part.The electric tool that has this transmission mechanism is when realizing bore operation; Gear is to rotate as main drive disk assembly always; And realize that with gear the fork shift mechanism that contact connects is static relatively; Because of friction produces a large amount of heat, these frictional heats can cause the lubricating oil temperature in the electric tool to raise between fork shift mechanism and the gear, and the mobile meeting of lubricating oil raises the electric tool bulk temperature.The shell body generation distortion that this is prone to make plastics on the one hand also can ring to the whole sealing effectiveness of electric tool by scape on the other hand, is prone to the seepage of lubricating oil, and after use a period of time, the electric hammer surface is prone to dirty.In addition, dial retaining device and contact with direct geared, after the long-term work, serious wear between the two, this also can have influence on the sensitivity of fork shift mechanism work.
Summary of the invention
For overcoming above-mentioned defective, the technical issues that need to address of the present invention: a kind of electric hammer transmission mechanism is provided, and the application of this transmission mechanism can effectively improve the functional reliability of electric hammer.
For solveing the technical problem technical scheme of the present invention: a kind of electric hammer transmission mechanism has gear wheel, idler gear, jackshaft, clutch gear; Gear wheel is meshed with idler gear; Idler gear, clutch gear all are socketed on the jackshaft slidably, are equipped with the keyway fit structure that cooperatively interacts between clutch gear and the jackshaft and between idler gear and the jackshaft, and fork shift mechanism links with clutch gear and idler gear respectively; It is characterized in that; Keyway fit structure between said idler gear and the jackshaft is provided with clutch shaft bearing along the length of the size of jackshaft on axially less than the gear teeth on the idler gear on idler gear, the inner ring of clutch shaft bearing is an idler gear; The outer ring of clutch shaft bearing is provided with groove, and described fork shift mechanism is connected in this groove.Gear wheel circumferentially regularly the gap be socketed on the drill bit shaft, gear wheel drives drill bit shaft and rotates, and makes electric hammer realize the boring function.The rear end face of clutch gear is provided with the drive mechanism that can match with swing-bar mechanism, when clutch gear rotates, can drive the swing-bar mechanism action, and realize the impact function of electric hammer.Fork shift mechanism is through to idler gear, clutch gear the stirring of axial location on jackshaft, and realizes that electric hammer switches between synchronous these the three kinds of mode of operations of conflicting model, drill mode, conflicting model and drill mode.Realize connecting of contact between fork shift mechanism and the clutch shaft bearing, no matter whether idler gear can keep static relatively rotating between the outer ring of fork shift mechanism and clutch shaft bearing.
Ball in the clutch shaft bearing is offset to a side of outer ring; Axially stretch out towards the gear wheel direction along jackshaft the outer ring; Gap between the inner peripheral surface of this extension of outer ring and the jackshaft outer peripheral face is much smaller than the diameter of ball, and the gear teeth on the said idler gear are positioned at the outside of clutch shaft bearing.This makes that the outer ring of clutch shaft bearing is relatively large, is convenient on the outer ring, be provided for the joining structure with fork shift mechanism.The good stability of clutch shaft bearing on idler gear, in the idler gear rotation process, the outer ring in the clutch shaft bearing can keep good positional stability.
Said groove ringwise, groove is arranged on the outer peripheral face of outer ring extension.This has made things convenient for the setting of groove.
The periphery of said clutch gear is provided with second bearing, and the inner ring of second bearing is a clutch gear, and fork shift mechanism is connected in the cannelure on the second bearing outer ring outer peripheral face.When clutch gear drives the swing-bar mechanism action, not friction basically between fork shift mechanism and the clutch gear.
Said fork shift mechanism comprises knob, first plectrum and second plectrum; Two otic placodes on first plectrum, second plectrum all are socketed on the bearing pin with gap; Bearing pin is parallel with jackshaft; Outside otic placode and idler gear on first plectrum link, and inboard otic placode and clutch gear on second plectrum link, and the post of dialling on the knob is plugged in the interval between the inboard otic placode of two plectrums; On pin, be socketed with spring, the inboard otic placode apportion of the spring and second plectrum is in the relative both sides of the inboard otic placode of first plectrum, and the two ends of spring act on respectively on inboard otic placode of first plectrum and second plectrum outside otic placode.This makes that the fork shift mechanism structure is simple, is convenient to be provided with, and conveniently through knob the mode of operation of electric hammer is switched.
Said first plectrum is provided with seam, and seam is towards the inboard otic placode of second plectrum.The setting of seam makes between two plectrums and conveniently to arrange that the inboard otic placode of second plectrum can be resisted against in this seam, can improve between two plectrums connection stability in some position.
Be socketed with the interlock plate of " Qian " shape on the said pin; The interlock plate and first plectrum link; Outer end at the interlock plate is provided with some dentation convex bodys, and after the keyway fit structure between idler gear and the jackshaft was thrown off, these dentation convex bodys were meshed with gear wheel.Interlock plate and the interlock of first plectrum stop action at gear wheel, that is to say that when electric hammer was done simple impact work, these dentation convex bodys were meshed with gear wheel, thereby can guarantee the circumferentially fixing of gear wheel, so that electric hammer carries out simple percussion action up hill and dale.
The outside otic placode of said first plectrum is plugged in the interlock plate.This can effectively improve the structural compactness at fork shift mechanism place, is convenient to the interlock that gusset piece is followed first plectrum.
In the plate that links, be socketed with two spiral springs on the pin, the two ends of a spiral spring act on respectively on the inner of first plectrum outside otic placode and interlock plate, and the two ends of another spiral spring act on respectively on first plectrum outside otic placode and the interlock plate outer end.These two spiral springs can effectively guarantee to link mild property of plate action, the engagement of be convenient to link plate and gear wheel, make knob in rotation process gently.
Therefore; Beneficial effect of the present invention: since idler gear in transmission process not can and fork shift mechanism between produce friction; The frictional heat that clutch shaft bearing is produced in rotation process is little, when electric hammer is worked with the pattern of boring, can not produce a large amount of heat in the inside of electric hammer; This helps the maintenance of electric hammer plastic casing body, and electric hammer integral body is difficult for 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 receive bigger influence; Electric hammer is difficult for leakage of oil takes place, and in the service life that this can effectively improve electric hammer, does not need often electric hammer to be keeped in repair.Fork shift mechanism can not produce friction with idler gear in the electric hammer course of work, the wear extent of fork shift mechanism is little, thereby can effectively guarantee the work sensitivity of fork shift mechanism.
Description of drawings
Fig. 1 is the longitudinal sectional view that has this transmission mechanism electric hammer;
Fig. 2 is the structural representation of this electric hammer transmission mechanism;
Fig. 3 is the stereogram of a direction of this electric hammer transmission mechanism;
Fig. 4 is the stereogram of another direction of this electric hammer transmission mechanism;
Fig. 5 is the partial structurtes sketch map that has this transmission mechanism electric hammer.
Among the figure: 1, jackshaft; 2, idler gear; 3, groove; 4, outer ring; 5, cannelure; 6, second bearing; 7, clutch gear; 8, gear wheel; 9, the gear teeth; 10, bearing pin; 11, spiral spring; 12, first plectrum; 13, spring; 14, second plectrum; 15, dial post; 16, knob; 17, interlock plate; 18, dentation convex body; 19, seam.
The specific embodiment
Pass through preferred embodiment below, and combine Figure of description that technical scheme of the present invention is further specified:
Embodiment: to shown in Figure 5, electric hammer transmission mechanism of the present invention is arranged in the electric hammer like Fig. 1, and structure comprises gear wheel 8, idler gear 2, jackshaft 1, clutch gear 7.Wherein, Idler gear 2, clutch gear 7 are socketed in the periphery of jackshaft 1 with gap; Be provided with the keyway fit structure between idler gear 2 and the jackshaft 1 and between clutch gear and the jackshaft 1, so that the transmission of power on the jackshaft 1 is on idler gear 2 and clutch gear 7.
Keyway fit structure between idler gear 2 and the jackshaft 1 is less than the length of the gear teeth 9 on the idler gear 2 along jackshaft 1 size on axially; Be idler gear 2 with after the keyway fit structure between the jackshaft 1 is thrown off mutually, the gear teeth 9 still can be engaged on the gear wheel 8.
The periphery of idler gear 2 is provided with clutch shaft bearing, and idler gear 2 itself is promptly as the inner ring of clutch shaft bearing, and the gear teeth 9 on the idler gear 2 are positioned at the outside of clutch shaft bearing.Ball in the clutch shaft bearing is to be biased in the clutch shaft bearing, and ball is partial to a side relative with gear wheel 8.Axially stretch out to gear wheel 8 directions along jackshaft 1 the outer ring 4 of clutch shaft bearing, thereby this outer ring 4 forms columnar extension in the side near gear wheel 8.Idler gear 2 is cylindrical in the inboard part of this extension, and the gap between extension and idler gear 2 cylindrical parts is very little, reaches a millimeter rank, and this gap will be much smaller than the diameter of centimetre rank ball in the clutch shaft bearing.On the outer peripheral face of clutch shaft bearing outer ring 4 extensions, be provided with circular groove 3, this groove 3 is used for and dials retaining device linking.
The periphery of clutch gear 7 is provided with second bearing 6, and clutch gear 7 itself is the inner ring of second bearing 6, and the outer peripheral face of second bearing, 6 outer rings is provided with cannelure 5, dials retaining device and this cannelure 5 and links.
The structure of dialling retaining device comprises knob 16, first plectrum 12 and second plectrum 14; First plectrum 12 and second plectrum 14 all are the polymorphic structures by sheet integral machine-shaping generally; The both end sides of this two plectrum all is formed with the otic placode that stretches out in the same way; Inboard otic placode on one plectrum extend in another plectrum, and two plectrums snap together through inboard otic placode separately is staggered, and the post 15 of dialling on the knob 16 is plugged in the interval between these two inboard otic placodes.For ease of arranging, and two plectrums lean on support each other when some position, on first plectrum 12, are provided with seam 19, the inboard otic placode of this seam 19 on second plectrum 14, and the inboard otic placode on second plectrum 14 can be resisted against in this seam 19.Otic placode on two plectrums all is socketed on the bearing pin 10 with gap, and bearing pin 10 is arranged in parallel with above-mentioned jackshaft 1.In the groove 3 on the ground grafting clutch shaft bearing outer ring, outboard ear sheet separation 4 on first plectrum 12, be plugged on to the outboard ear sheet separation on second plectrum 14 in the cannelure 5 on second bearing, 6 outer rings.For improving the stability of two plectrums on bearing pin 10; On bearing pin 10, be socketed with spring 13; Inboard otic placode apportion on the spring 13 and second plectrum 14 is in the relative both sides of first plectrum, 12 inboard otic placodes, and the two ends of spring 13 act on respectively on second plectrum, 14 outside otic placodes and first plectrum, the 12 inboard otic placodes.Under the effect of spring 13, group post 15 on the tight knob 16 of the inboard ear plate holder on two plectrums.
On the bearing pin 10 near a side clearance of first plectrum 12 be socketed with the medium position place that outside otic placode on interlock plate 17, the first plectrums 12 that are " Qian " shape is positioned at interlock plate 17.Outer end at interlock plate 17 is provided with some dentation convex bodys 18, and these dentation convex bodys 18 stretch out towards gear wheel 8 along the axis perpendicular to gear wheel 8. Interlock plate 17 and 12 interlocks of first plectrum, when electric hammer was worked with simple conflicting model, these dentation convex bodys 18 were meshed with gear wheel 8.
Internal sleeve in interlock plate 17 on the bearing pin 10 is connected to two double helix springs 11; The two ends of one double helix spring 11 act on respectively on the inner end and the outside otic placode on first plectrum 12 of interlock plate 17, and the two ends of another spiral spring 11 act on respectively on the outer end and the outside otic placode on first plectrum 12 of interlock plate 17.
On the basis of state shown in Figure 2; Clockwise 90 degree are pulled knob 16, dial post 15 and impel the keyway fit structure between idler gear 2 and the jackshaft 1 to throw off, and dial post 15 through first plectrum, 12 pulling interlock plates 17; Make dentation convex body 18 and gear wheel 8 engagements on the interlock plate 17; Under the effect of spring 13 elastic force, clutch gear 7 cooperates with swing-bar mechanism is stable, and the electric hammer of this moment can be operated on the simple conflicting model.Continue 90 degree and pull knob 16; Spring 13 promotes 12 motions of first plectrum; Through the outside otic placode on it, a double helix spring 11 the dentation convex body 18 of interlock plate 17 outer ends and gear wheel 8 are thrown off in first plectrum, 12 motion processes, idler gear 2 cooperates with keyway fit structure between the jackshaft 1, under the effect of spring 13; Clutch gear 7 cooperates with swing-bar mechanism, electric hammer can be operated in again impact with the synchronous mode of operation of boring on.
Continue 90 degree again and pull knob 16; Dialling post 15 drives two plectrums all moves towards the direction of gear wheel 8; Clutch gear 7 is thrown off with swing-bar mechanism; Keyway fit structure between idler gear 2 and the jackshaft 1 still is combined together, and the dentation convex body 18 on interlock plate 17 outer ends is thrown off with gear wheel 8 already, and the electric hammer of this moment can be operated on the simple drill mode.
Above-described embodiment is a kind of preferred version of the present invention, is not the present invention is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Make the content of detailed description in this specification, belong to the those skilled in the art known prior art.
Claims (9)
1. electric hammer transmission mechanism; Have gear wheel, idler gear, jackshaft, clutch gear, gear wheel is meshed with idler gear, and idler gear, clutch gear all are socketed on the jackshaft slidably; Be equipped with the keyway fit structure that cooperatively interacts between clutch gear and the jackshaft and between idler gear and the jackshaft; Fork shift mechanism links with clutch gear and idler gear respectively, it is characterized in that, the keyway fit structure between said idler gear and the jackshaft is along the length of the size of jackshaft on axially less than the gear teeth on the idler gear; On idler gear, be provided with clutch shaft bearing; The inner ring of clutch shaft bearing is an idler gear, and the outer ring of clutch shaft bearing is provided with groove, and described fork shift mechanism is connected in this groove.
2. electric hammer transmission mechanism according to claim 1; It is characterized in that; Ball in the clutch shaft bearing is offset to a side of outer ring; Axially stretch out towards the gear wheel direction along jackshaft the outer ring, and the gap between the inner peripheral surface of this extension of outer ring and the jackshaft outer peripheral face is much smaller than the diameter of ball, and the gear teeth on the said idler gear are positioned at the outside of clutch shaft bearing.
3. electric hammer transmission mechanism according to claim 2 is characterized in that, said groove ringwise, groove is arranged on the outer peripheral face of outer ring extension.
4. electric hammer transmission mechanism according to claim 1 is characterized in that the periphery of said clutch gear is provided with second bearing, and the inner ring of second bearing is a clutch gear, and fork shift mechanism is connected in the cannelure on the second bearing outer ring outer peripheral face.
5. according to claim 1,2,3 or 4 described electric hammer transmission mechanisms; It is characterized in that said fork shift mechanism comprises knob, first plectrum and second plectrum, two otic placodes on first plectrum, second plectrum all are socketed on the bearing pin with gap; Bearing pin is parallel with jackshaft; Outside otic placode and idler gear on first plectrum link, and inboard otic placode and clutch gear on second plectrum link, and the post of dialling on the knob is plugged in the interval between the inboard otic placode of two plectrums; On pin, be socketed with spring, the inboard otic placode apportion of the spring and second plectrum is in the relative both sides of the inboard otic placode of first plectrum, and the two ends of spring act on respectively on inboard otic placode of first plectrum and second plectrum outside otic placode.
6. electric hammer transmission mechanism according to claim 5 is characterized in that, said first plectrum is provided with seam, and seam is towards the inboard otic placode of second plectrum.
7. electric hammer transmission mechanism according to claim 5; It is characterized in that; Be socketed with the interlock plate of " Qian " shape on the said pin, the interlock plate and first plectrum link, and are provided with some dentation convex bodys in the outer end of interlock plate; After the keyway fit structure between idler gear and the jackshaft is thrown off, these dentation convex bodys and gear wheel engagement.
8. electric hammer transmission mechanism according to claim 7 is characterized in that, the outside otic placode of said first plectrum is plugged in the interlock plate.
9. electric hammer transmission mechanism according to claim 8; It is characterized in that; In the interlock plate, be socketed with two spiral springs on the pin; The two ends of a spiral spring act on respectively on the inner of first plectrum outside otic placode and interlock plate, and the two ends of another spiral spring act on respectively on first plectrum outside otic placode and the interlock plate outer end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210373739.8A CN102837295B (en) | 2012-10-02 | 2012-10-02 | Electric hammer drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210373739.8A CN102837295B (en) | 2012-10-02 | 2012-10-02 | Electric hammer drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102837295A true CN102837295A (en) | 2012-12-26 |
| CN102837295B CN102837295B (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210373739.8A Active CN102837295B (en) | 2012-10-02 | 2012-10-02 | Electric hammer drive mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN102837295B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228192A (en) * | 2017-06-19 | 2017-10-03 | 锐奇控股股份有限公司 | A kind of gear adjusting device and method |
| CN107336199A (en) * | 2017-08-01 | 2017-11-10 | 江苏东成机电工具有限公司 | Multifunctional electric hammer |
| CN107984433A (en) * | 2017-12-30 | 2018-05-04 | 江苏东成机电工具有限公司 | Pattern switching mechanism and its electric tool |
| CN109555792A (en) * | 2018-12-05 | 2019-04-02 | 浙江亚特电器有限公司 | A kind of electric hammer arrangement of clutch |
| CN110000741A (en) * | 2019-04-23 | 2019-07-12 | 无锡锐克电动工具有限公司 | A kind of multi-functional brushless lithium electric hammer drill of Single button |
| WO2021115332A1 (en) * | 2019-12-09 | 2021-06-17 | 苏州宝时得电动工具有限公司 | Electric hammer |
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| CN202241182U (en) * | 2011-09-19 | 2012-05-30 | 无锡锐克电动工具有限公司 | Single-knob four-function electric hammer |
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| US6192996B1 (en) * | 1999-08-26 | 2001-02-27 | Makita Corporation | Mode changing mechanism for use in a hammer drill |
| CN2424208Y (en) * | 2000-02-26 | 2001-03-21 | 贵州虹山轴承研究所 | Special coupling axle bearing for chuck axle of chemical fiber high speed spinning curler head |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107228192A (en) * | 2017-06-19 | 2017-10-03 | 锐奇控股股份有限公司 | A kind of gear adjusting device and method |
| CN107336199A (en) * | 2017-08-01 | 2017-11-10 | 江苏东成机电工具有限公司 | Multifunctional electric hammer |
| CN107984433A (en) * | 2017-12-30 | 2018-05-04 | 江苏东成机电工具有限公司 | Pattern switching mechanism and its electric tool |
| CN109555792A (en) * | 2018-12-05 | 2019-04-02 | 浙江亚特电器有限公司 | A kind of electric hammer arrangement of clutch |
| CN109555792B (en) * | 2018-12-05 | 2023-10-13 | 浙江亚特电器股份有限公司 | Electric hammer clutch device |
| CN110000741A (en) * | 2019-04-23 | 2019-07-12 | 无锡锐克电动工具有限公司 | A kind of multi-functional brushless lithium electric hammer drill of Single button |
| WO2021115332A1 (en) * | 2019-12-09 | 2021-06-17 | 苏州宝时得电动工具有限公司 | Electric hammer |
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|---|---|
| CN102837295B (en) | 2014-11-12 |
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