CN202825747U - Electric hammer transmission mechanism - Google Patents
Electric hammer transmission mechanism Download PDFInfo
- Publication number
- CN202825747U CN202825747U CN 201220508391 CN201220508391U CN202825747U CN 202825747 U CN202825747 U CN 202825747U CN 201220508391 CN201220508391 CN 201220508391 CN 201220508391 U CN201220508391 U CN 201220508391U CN 202825747 U CN202825747 U CN 202825747U
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- China
- Prior art keywords
- gear
- plectrum
- electric hammer
- jackshaft
- otic placode
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Abstract
The utility model discloses an electric hammer transmission mechanism. The problems that an existing electric hammer is easy to deform in working process and lubricating oil is easy to leak are solved. The technical scheme is that the electric hammer transmission mechanism is provided with a large gear, a middle gear, a middle shaft and a clutch gear. The large gear is meshed with the middle gear, the middle gear and the clutch gear are both connected on the middle shaft in sliding and sleeved modes, and key groove matching structures which are matched with each other are arranged between the clutch gear and the middle gear and the middle gear and the middle shaft. A gear shifting mechanism is respectively connected with the clutch gear and the middle gear, and the size of the key groove matching structure between the middle gear and the middle shaft along the axial direction of the middle shaft is smaller than the length of a gear tooth of the middle gear. A first bearing is arranged on the middle gear, the inner ring of the first gear is the middle gear, a groove is arranged in the outer ring of the first bearing, and the gear shifting mechanism is connected inside the groove.
Description
Technical field
The utility model relates to a kind of electric hammer, relates in particular to a kind of being located in the electric hammer, is used for making electric hammer to finish the transmission mechanism of 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: by the axle that the driving mechanism of electric tool drives, 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, be provided with fork in the outer ring, fork extends in the inclined plane at slideway place.The utility model also relates to a kind of electric tool of aforementioned transmission mechanism, electric hammer drill especially of comprising.
In the structure of this transmission mechanism of electric tool, jackshaft is split-type structural, be jackshaft by the first axle part and coaxial being set together of the second axle part and consist of, between the mutually close end of these two axial regions, be provided with concave-convex fit structure, utilize concave-convex fit structure to be combined together, make power between the first axle part and the second axle part, realize transmitting.Circumferentially be socketed with regularly gear on the first axle part, the fork shift mechanism in the transmission mechanism directly realizes connecting of contact with gear, so that fork shift mechanism handsetting gear endwisely slips at the first axle part.With the electric tool of this transmission mechanism 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 relative static, produce a large amount of heat because of friction between fork shift mechanism and the gear, these frictional heats can cause the lubricating oil temperature in the electric tool to raise, and the mobile meeting of lubricating oil raises the electric tool bulk temperature.This one side easily makes the shell body of plastics produce distortion, also can ring the sealing effectiveness that arrives electric tool integral body 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 easily 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 defects, the utility model technical issues that need to address: provide a kind of electric hammer transmission mechanism, the functional reliability that the application of this transmission mechanism can the Effective Raise electric hammer.
For solveing the technical problem, the technical solution of the utility model: 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 is 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, size on keyway fit structure between described idler gear and the jackshaft is axial along jackshaft is less than the length of the gear teeth on the idler gear, be provided with clutch shaft bearing at idler gear, the inner ring of clutch shaft bearing is 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 drilling 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 by 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 is rotating, can keep relative static 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 described idler gear are positioned at the outside of clutch shaft bearing.This is so that the outer ring of clutch shaft bearing is relatively large, is convenient to be provided in the outer ring 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.
Described 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 described clutch gear is provided with the second bearing, and the inner ring of the second bearing is 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, there is no friction between fork shift mechanism and the clutch gear.
Described fork shift mechanism comprises knob, the first plectrum and the second plectrum, two otic placodes on the first plectrum, the second plectrum all are socketed on the bearing pin with gap, bearing pin is parallel with jackshaft, outside otic placode and idler gear on the first plectrum link, inboard otic placode and clutch gear on the second plectrum link, and the reversed column on the knob is plugged in the interval between the inboard otic placode of two plectrums; Be socketed with spring at pin, the inboard otic placode apportion of spring and the second plectrum is in the relative both sides of the inboard otic placode of the first plectrum, and the two ends of spring act on respectively on the inboard otic placode of the first plectrum and the second plectrum outside otic placode.This is convenient to arrange so that the fork shift mechanism structure is simple, conveniently by knob the mode of operation of electric hammer is switched.
Described the first plectrum is provided with seam, and seam is towards the inboard otic placode of the second plectrum.The setting of seam so that conveniently between two plectrums arrange that the inboard otic placode of the second plectrum can be resisted against in this seam, can improve between two plectrums connection stability in some position.
Be socketed with the linkage board of " Qian " shape on the described pin, linkage board and the first plectrum link, be provided with some dentation convex bodys in the outer end of linkage board, after the keyway fit structure between idler gear and the jackshaft was thrown off, these dentation convex bodys were meshed with gear wheel.Linkage board and the interlock of the 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 described the first plectrum is plugged in the linkage board.But the structural compactness at this Effective Raise fork shift mechanism place is convenient to the interlock that gusset piece is followed the first plectrum.
Be socketed with two spiral springs on the pin in linkage board, the two ends of a spiral spring act on respectively on the inner of the first plectrum outside otic placode and linkage board, and the two ends of another spiral spring act on respectively on the first plectrum outside otic placode and the linkage board outer end.These two spiral springs can effectively guarantee the mild property of linkage board action, are convenient to the engagement of linkage board and gear wheel, so that knob is mild in rotation process.
Therefore, the beneficial effects of the utility model: since idler gear in transmission process not can and fork shift mechanism between produce friction, the frictional heat that clutch shaft bearing produces in rotation process is little, electric hammer with boring work pattern the time, 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 be subject to larger impact, electric hammer is difficult for occuring leakage of oil, in the service life of this energy Effective Raise 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 with 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 schematic diagram with this transmission mechanism electric hammer.
Among the figure: 1, jackshaft; 2, idler gear; 3, groove; 4, outer ring; 5, cannelure; 6, the second bearing; 7, clutch gear; 8, gear wheel; 9, the gear teeth; 10, bearing pin; 11, spiral spring; 12, the first plectrum; 13, spring; 14, the second plectrum; 15, reversed column; 16, knob; 17, linkage board; 18, dentation convex body; 19, seam.
The specific embodiment
Below by preferred embodiment, and in conjunction with Figure of description the technical solution of the utility model is further described in detail:
Embodiment: to shown in Figure 5, the utility model electric hammer transmission mechanism is arranged in the electric hammer such as 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 that the gear teeth 9 still can be engaged on the gear wheel 8 after idler gear 2 was thrown off mutually with the keyway fit structure between the jackshaft 1.
The periphery of idler gear 2 is provided with clutch shaft bearing, and idler gear 2 itself is namely 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.The part of idler gear 2 in this extension inboard is cylindrical, 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.Outer peripheral face at clutch shaft bearing outer ring 4 extensions is provided with circular groove 3, and this groove 3 is used for and dials retaining device linking.
The periphery of clutch gear 7 is provided with the second bearing 6, and clutch gear 7 itself is the inner ring of the second bearing 6, and the outer peripheral face in the 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, the first plectrum 12 and the second plectrum 14, the first plectrum 12 and the second plectrum 14 generally all are the polymorphic structures by sheet integral machine-shaping, 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, the inboard otic placode of two plectrums by separately is staggered to be snapped together, and the reversed column 15 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, are provided with seam 19 at the first plectrum 12, the inboard otic placode of this seam 19 on the second plectrum 14, and the inboard otic placode on the 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 the first plectrum 12, be plugged on to the outboard ear sheet separation on the second plectrum 14 in the cannelure 5 on the second bearing 6 outer rings.For improving the stability of two plectrums on bearing pin 10, be socketed with spring 13 at bearing pin 10, inboard otic placode apportion on spring 13 and the second plectrum 14 is in the relative both sides of the first plectrum 12 inboard otic placodes, and the two ends of spring 13 act on respectively on the second plectrum 14 outside otic placodes and the first plectrum 12 inboard otic placodes.Under the effect of spring 13, the reversed column 15 on the inboard ear board clamping knob 16 on two plectrums.
On the bearing pin 10 near a side clearance of the first plectrum 12 be socketed with the medium position place that outside otic placode on linkage board 17, the first plectrums 12 that are " Qian " shape is positioned at linkage board 17.Be provided with some dentation convex bodys 18 in the outer end of linkage board 17, these dentation convex bodys 18 stretch out towards gear wheel 8 along the axis perpendicular to gear wheel 8. Linkage board 17 and 12 interlocks of the 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 linkage board 17 on the bearing pin 10 is connected to two spiral springs 11, the two ends of a spiral spring 11 act on respectively on the inner end and the outside otic placode on the first plectrum 12 of linkage board 17, and the two ends of another spiral spring 11 act on respectively on the outer end and the outside otic placode on the first plectrum 12 of linkage board 17.
On the basis of state shown in Figure 2, clockwise 90 degree are pulled knob 16, reversed column 15 impels the keyway fit structure between idler gear 2 and the jackshaft 1 to throw off, and reversed column 15 is by the first plectrum 12 pulling linkage boards 17, make dentation convex body 18 and gear wheel 8 engagements on the linkage board 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 the first plectrum, by the outside otic placode on it, a spiral spring 11 the dentation convex body 18 of linkage board 17 outer ends and gear wheel 8 are thrown off in the 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 again 90 degree and pull knob 16, reversed column 15 drives two plectrums and 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 linkage board 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 utility model, is not the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
The content that is not described in detail in this specification belongs to the known prior art of those skilled in the art.
Claims (9)
1. electric hammer transmission mechanism, has gear wheel, idler gear, jackshaft, clutch gear, gear wheel is meshed with idler gear, idler gear, clutch gear all is 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, size on keyway fit structure between described idler gear and the jackshaft is axial along jackshaft is less than the length of the gear teeth on the idler gear, be provided with clutch shaft bearing at idler gear, the inner ring of clutch shaft bearing is idler gear, 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, 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 described idler gear are positioned at the outside of clutch shaft bearing.
3. electric hammer transmission mechanism according to claim 2 is characterized in that, described 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 described clutch gear is provided with the second bearing, and the inner ring of the second bearing is 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, described fork shift mechanism comprises knob, the first plectrum and the second plectrum, two otic placodes on the first plectrum, the second plectrum all are socketed on the bearing pin with gap, bearing pin is parallel with jackshaft, outside otic placode and idler gear on the first plectrum link, and inboard otic placode and clutch gear on the second plectrum link, and the reversed column on the knob is plugged in the interval between the inboard otic placode of two plectrums; Be socketed with spring at pin, the inboard otic placode apportion of spring and the second plectrum is in the relative both sides of the inboard otic placode of the first plectrum, and the two ends of spring act on respectively on the inboard otic placode of the first plectrum and the second plectrum outside otic placode.
6. electric hammer transmission mechanism according to claim 5 is characterized in that, described the first plectrum is provided with seam, and seam is towards the inboard otic placode of the second plectrum.
7. electric hammer transmission mechanism according to claim 5, it is characterized in that, be socketed with the linkage board of " Qian " shape on the described pin, linkage board and the first plectrum link, be provided with some dentation convex bodys in the outer end of linkage board, 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 described the first plectrum is plugged in the linkage board.
9. electric hammer transmission mechanism according to claim 8, it is characterized in that, in linkage board, be socketed with two spiral springs on the pin, the two ends of a spiral spring act on respectively on the inner of the first plectrum outside otic placode and linkage board, and the two ends of another spiral spring act on respectively on the first plectrum outside otic placode and the linkage board outer end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220508391 CN202825747U (en) | 2012-10-02 | 2012-10-02 | Electric hammer transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220508391 CN202825747U (en) | 2012-10-02 | 2012-10-02 | Electric hammer transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202825747U true CN202825747U (en) | 2013-03-27 |
Family
ID=47937539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220508391 Expired - Lifetime CN202825747U (en) | 2012-10-02 | 2012-10-02 | Electric hammer transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202825747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837295A (en) * | 2012-10-02 | 2012-12-26 | 浙江奔宇工具有限公司 | Electric hammer drive mechanism |
-
2012
- 2012-10-02 CN CN 201220508391 patent/CN202825747U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837295A (en) * | 2012-10-02 | 2012-12-26 | 浙江奔宇工具有限公司 | Electric hammer drive mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |
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| CX01 | Expiry of patent term |