CN202378013U - Magnetic electric hammer drill capable of canceling additional magnetic torque - Google Patents
Magnetic electric hammer drill capable of canceling additional magnetic torque Download PDFInfo
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- CN202378013U CN202378013U CN2011205225639U CN201120522563U CN202378013U CN 202378013 U CN202378013 U CN 202378013U CN 2011205225639 U CN2011205225639 U CN 2011205225639U CN 201120522563 U CN201120522563 U CN 201120522563U CN 202378013 U CN202378013 U CN 202378013U
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- permanent magnet
- magnet rings
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Abstract
The utility model discloses a magnetic electric hammer drill capable of canceling an additional magnetic torque. The magnetic electric hammer drill comprises a casing, a movement transmission mechanism, a magnetic impact mechanism and a drill chuck, wherein in the magnetic impact mechanism, a driving permanent magnet ring consists of a large permanent magnet ring and a small permanent magnet ring which reverse coaxially, and the small permanent magnet ring is nested in the large permanent magnet ring; the end surface of the small permanent magnet ring is fixedly connected with the large end surface of a drive disk, and a small driven gear is mounted on the shaft of the drive disk and connected with a small drive gear mounted on a middle shaft through an idle gear; and the end surface of the large permanent magnet ring is fixedly connected with the large end surface of a shaft sleeve outside the drive disk, the shaft sleeve is fixed in the casing of the electric hammer drill through a bearing, and a large driven gear is arranged on the shaft of the shaft sleeve and meshed with a large drive gear mounted on the middle shaft. According to the utility model, the additional magnetic torque exerted on the driven permanent magnet ring is cancelled through coaxial reverse rotation between the large and the small permanent magnet rings, a frictional force between a guide sleeve and an impact plate is reduced, and the impact efficiency is improved.
Description
Technical field
The utility model relates to a kind of electric hand tool, especially relates to a kind of magnetic force electric hammer that can offset additional magnetic moment of torsion and bores.
Background technology
It is that a kind of employing magnetic force mechanism will rotatablely move and convert the reciprocating electric hammer of translation into and bore that the magnetic force electric hammer bores; Impact hammer drill than traditional air cylinder formula electric impact drill, pneumatic type, magnetic driving mechanism has and do not have wearing and tearing, simple in structure, advantage such as the noise vibrations are little, environment friendly and pollution-free.The patent No. be 200710070248.5,200710070110.5 and application number be that 200910154740.X, patents such as 201110149454.1 all relate to the magnetic force electric hammer and bore; Its core institution is the driving permanent magnet rings of coaxial arranged in series, driven permanent magnet rings; The magnetic pole that exists a plurality of N utmost points, the S utmost point alternately to arrange on each permanent magnet rings; And make it only can do the axial translation motion through the rotation that pilot sleeve limits driven permanent magnet rings; When motor drives the rotation of driving permanent magnet rings through transmission system; Driven permanent magnet rings realizes that under the effect that replaces rotating excitation field translation moves back and forth, and meanwhile initiatively permanent magnet rings produces an additional magnetic moment of torsion on driven permanent magnet rings.Above-mentioned patent all is that the rotation through pilot sleeve restriction impact disc and driven permanent magnet rings overcomes this additional magnetic moment of torsion; Thereby the very big normal pressure of existence between pilot sleeve and the impact disc; When impact disc is done to move back and forth at a high speed in pilot sleeve; The frictional force that should additional magnetic moment of torsion causes is converted into thermal dissipation with a large amount of mechanical energy, makes electric hammer bore heating, greatly reduces the impact usefulness of electric hammer brill.
Summary of the invention
The purpose of the utility model is to provide a kind of magnetic force electric hammer that can offset additional magnetic moment of torsion to bore; The coaxial reverse rotation of the big permanent magnet rings of this beater mechanism utilization, little permanent magnet interannular; The additional magnetic moment of torsion of negative function on driven permanent magnet rings; Reduce the heating that electric hammer bores, improve and impact usefulness.
The technical scheme that the utility model technical solution problem is adopted is:
The utility model comprises housing; By motor, be installed in the idler gear of jackshaft one end, be installed in the driving gear of the jackshaft other end, the movement transferring that the driven wheel that is meshed with driving gear is formed; By driving-disc, the initiatively magnetic impacting mechanism formed of permanent magnet rings, driven permanent magnet rings, impact disc and the drill chuck that is connected with the turnbarrel end; In the described magnetic impacting mechanism, initiatively permanent magnet rings is made up of the little permanent magnet rings of coaxial reverse, big permanent magnet rings, and it is inner that little permanent magnet rings is nested in big permanent magnet rings, and little permanent magnet rings external diameter is less than the internal diameter of big permanent magnet rings; Little permanent magnet rings end face is fixedly connected with the large end face of driving-disc, on the axle of driving-disc little driven gear is housed, and little driven gear is connected with small active gear on being contained in jackshaft through idle pulley; The large end face of the axle sleeve that big permanent magnet rings end face is outer with being enclosed within driving-disc is fixedly connected, and axle sleeve bores in the housing at electric hammer through the axle sleeve bearing fixing, and the axle sleeve axle is provided with big driven gear, big driven gear and the big driving gear engagement that is contained on the jackshaft.
Described little permanent magnet rings, big permanent magnet rings and driven permanent magnet rings all along the circumferential direction have the N utmost point, the S utmost point alternately arranged of similar number, and each magnetic pole right angle of circumference equate.
Speed reducing ratio between described big driving gear and big driven gear is identical with the speed reducing ratio between little driven gear with the small active gear that connects through idle pulley.
The utility model is compared with background technology, and the beneficial effect that has is:
The multinomial magnetic force electric hammer that relates in the utility model and the background technology bores to be compared; Coaxial reverse rotation through big permanent magnet rings, little permanent magnet interannular; Offset the additional magnetic moment of torsion that acts on the driven permanent magnet rings; Reduce the frictional force between pilot sleeve and the impact disc greatly, reduced the heating that electric hammer bores, improved impact usefulness.
Description of drawings
Fig. 1 is the structural principle sketch map of the utility model;
Fig. 2 is the transmission mechanism oblique view of big permanent magnet rings in the utility model;
Fig. 3 is the transmission mechanism oblique view of the medium and small permanent magnet rings of the utility model;
The big permanent magnet rings of Fig. 4, little permanent magnet rings magnetic pole distribution schematic diagram.
Among the figure: 1, turnbarrel, 2, the turnbarrel bearing, 3, limit screw cap, 4, driven wheel, 5, pilot sleeve, 6, impact disc; 7, driven permanent magnet rings, 8, big permanent magnet rings, 9, little permanent magnet rings, 10, the axle sleeve bearing, 11, axle sleeve, 12, big driven gear; 13, little driven gear, 14, driving-disc, 15, the driving-disc bearing, 16, supporting base, 17, motor, 18, motor bearings; 19, jackshaft left end bearing, 20, jackshaft, 21, idler gear, 22, small active gear, 23, idle pulley; 24, big driving gear, 25, jackshaft right-hand member bearing, 26, driving gear, 27, housing, 28, drill chuck.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
As shown in Figure 1, the utility model comprises housing 27; By motor 17, be installed in the driving gear 26 of jackshaft 20 1 ends; Be installed in idler gear 21 and the small active gear 22 of jackshaft 20 other ends, big driving gear 24; A driven wheel 4 that is meshed with driving gear 26 and an end are installed in the turnbarrel 1 in driven wheel 4 holes; Idle pulley 23 (see figure 2)s that are meshed with small active gear 22 reach the little driven gear 13 on the driving-disc 14 that is installed in that is meshed with idle pulley 23, the movement transferring that is installed in big driven gear 12 compositions on the axle sleeve 11 that is meshed with big driving gear 24; Beater mechanism and the drill chuck 28 that is connected with turnbarrel 1 other end.In the described movement transferring; Turnbarrel 1 is fixed in the housing 27 through turnbarrel bearing 2; Jackshaft 20 is separately fixed in supporting base 16 and the housing 27 through jackshaft left end bearing 19, jackshaft right-hand member bearing 25; Jackshaft 20 is through the gears engaged on idler gear 21 and motor 17 armature shafts, and motor 17 armature shafts are fixed in the housing 27 through motor bearings 18; In the described magnetic impacting mechanism; Its pilot sleeve 5 is fixed in housing 27 1 ends; The small end that is arranged in the impact disc 6 of turnbarrel 1 is installed in pilot sleeve 5; The small end of impact disc 6 is connected with limit screw cap 3, and the big end of impact disc 6 is positioned at pilot sleeve 5 outer faces, and the driven permanent magnet rings 7 that magnetic pole is along the circumferential direction alternately arranged is installed; Driving-disc 14 1 ends are fixed in housing 27 other ends through driving-disc bearing 15, and the position that the big end of driving-disc 14 and impact disc 6 are relative is coaxial is equipped with little permanent magnet rings 9; The big end periphery of driving-disc 14 is with axle sleeve 11; One end of axle sleeve 11 is fixed in the housing 27 through axle sleeve bearing 10; The large end face of axle sleeve 11 is concordant with impact disc 6 large end faces, and the big permanent magnet rings 8 of and coplane coaxial with little permanent magnet rings 9 is installed on the large end face of axle sleeve 11.
The speed reducing ratio that described small active gear 22, little driven gear are 13 is identical with the speed reducing ratio of 12 of the big driving gears 24 that connects through idle pulley 23, big driven gear; Be fixed on small active gear 22 on the jackshaft 20, big driving gear 24 rotating speeds are identical, make identical, the switched in opposite of rotating speed of little driven gear 13, big driven gear 12.
As shown in Figure 2, be the transmission mechanism oblique view of big annular permanent magnnet 8 in the utility model.Gear on said motor 17 armature shafts and 21 engagements of the idler gear of jackshaft 20 1 ends, big driving gear 24 on the jackshaft 20 and 12 engagements of the big driven gear on the axle sleeve 11 are fixedly connected with big annular permanent magnnet 8 on the large end face of axle sleeve 11.
As shown in Figure 3, be the transmission mechanism oblique view of the medium and small permanent magnet rings 9 of the utility model.Gear on said motor 17 armature shafts and 21 engagements of the idler gear of jackshaft 20 1 ends; Small active gear 22 on the jackshaft 20 and idle pulley 23 engagements; Idle pulley 23 and little driven gear 13 engagements that are contained on the driving-disc 14 are fixedly connected with little annular permanent magnnet 9 on the large end face of driving-disc 14.Said idle pulley 23 dresses at one end are fixed on the axle of supporting base 16.
As shown in Figure 4, be big permanent magnet rings 8, little annular permanent magnnet ring 9 magnetic pole distribution schematic diagrams.The magnetic pole of described big permanent magnet rings 8, little annular permanent magnnet ring 9 along the circumferential direction is the N utmost point, the S utmost point is alternately arranged, the interface of the N utmost point and the S utmost point along annulus radially, and each magnetic pole right angle of circumference equal.
The operation principle of the utility model:
Like Fig. 1, shown in Figure 3, in the housing 27 of electric hammer motor 17 is housed, when motor 17 rotates; Utilize the idler gear 21 on its armature shaft front end gear driven jackshaft 20, driving gear 26 all is fixed on the jackshaft 20 and with jackshaft 20 and rotates with small active gear 22, big driving gear 24, therefore; Motor 17 output torques can be delivered on the driven wheel 4 through driving gear 26, and driven wheel 4 is fixed on the turnbarrel 1, and turnbarrel 1 is fixed in the housing 27 through turnbarrel bearing 2; Can not move axially; So can only rotate relative to housing 27, its front end is equipped with drill chuck 28, when 1 rotation of driven wheel 4 driven rotary sleeves; Can drive drill chuck 28 and rotate together, rotate thereby drive the drill bit (drill bit does not all draw among all figure) that is installed in wherein.
Simultaneously; Because small active gear 22, big driving gear 24 also are fixed on the jackshaft 20; When jackshaft 20 rotated counterclockwise, big driving gear 24 rotated thereupon, drives big driven gear 12 and clockwise rotates; Drive axle sleeve 11 again and clockwise rotate, and then drive little permanent magnet rings 9 and clockwise rotate; Meanwhile; Small active gear 22 also rotates counterclockwise with jackshaft 20; Drive idle pulley 23 again and clockwise rotate, drive little driven gear 13 again and rotate counterclockwise, drive driving-disc 14 again and rotate counterclockwise; And then drive big permanent magnet rings 8 and rotate counterclockwise, with the switched in opposite of little permanent magnet rings 9.Because the speed reducing ratio that the speed reducing ratio that small active gear 22, little driven gear are 13 and the big driving gear 24 that connects through idle pulley 23, big driven gear are 12 is identical, so identical, the switched in opposite of rotating speed of permanent magnet rings 8, little permanent magnet rings 9 greatly.
Because big permanent magnet rings 8, little permanent magnet rings 9 rotating speeds are identical and the N utmost point on it, S utmost point equiphase are interspersed (as shown in Figure 4); Driven permanent magnet rings 7 also is that the N utmost point, the S utmost point are interspersed and can not rotate; Suppose under the original state; Big permanent magnet rings 8, little permanent magnet rings 9 all produce maximum attraction to driven permanent magnet rings 7; When big permanent magnet rings 8, little permanent magnet rings 9 respectively counterclockwise, clockwise rotate a magnetic pole folder hour angle, big permanent magnet rings 8, little permanent magnet rings 9 all produce maximum repulsive force to driven permanent magnet rings 7, when rotating a magnetic pole angle more respectively; Then all driven permanent magnet rings 7 is produced maximum attraction, and then circulation successively.Therefore; Rotating speed is identical, the big permanent magnet rings 8 of switched in opposite, little permanent magnet rings 9 with the identical cycle driven permanent magnet rings 7 is produced attract, repulsive interaction; Thereby drive the impact disc that is fixedly connected with driven permanent magnet rings 7 and make reciprocal translational motion and drill hammer, finally realize the hammering function that electric hammer bores.
Because identical, the switched in opposite of rotating speed of big permanent magnet rings 8, little permanent magnet rings 9; Both are opposite to the additional magnetic torque direction that driven permanent magnet rings 7 produces; Interior external diameter value through big permanent magnet rings 8, little permanent magnet rings 9 rationally are set makes that these two reverse additional magnetic torque are identical, thereby offsets additional magnetic moment of torsion.
The invention that is used for explaining of the above-mentioned specific embodiment; Rather than the utility model limited; In the protection domain of the spirit of the utility model and claim,, all fall into the protection domain of the utility model to any modification and the change that the utility model is made.
Claims (3)
1. the magnetic force electric hammer that can offset additional magnetic moment of torsion bores, and comprises housing (27); By motor (17), be installed in the idler gear (21) of jackshaft (20) one ends, be installed in the driving gear (26) of jackshaft (20) other end, the movement transferring that the driven wheel (4) that is meshed with driving gear (26) is formed; By driving-disc (14), the initiatively magnetic impacting mechanism formed of permanent magnet rings, driven permanent magnet rings (7), impact disc (6) and the drill chuck (28) that is connected with turnbarrel (1) end; It is characterized in that: in the described magnetic impacting mechanism; Initiatively permanent magnet rings is made up of the little permanent magnet rings (9) of coaxial reverse, big permanent magnet rings (8); Little permanent magnet rings (9) is nested in big permanent magnet rings (8) inside, and little permanent magnet rings (9) external diameter is less than the internal diameter of big permanent magnet rings (8); Little permanent magnet rings (9) end face is fixedly connected with the large end face of driving-disc (14); On the axle of driving-disc (14) little driven gear (13) is housed, little driven gear (13) is connected with small active gear (22) on being contained in jackshaft (20) through idle pulley (23); The large end face of the axle sleeve (11) that big permanent magnet rings (8) end face is outer with being enclosed within driving-disc (14) is fixedly connected; Axle sleeve (11) is fixed on electric hammer through axle sleeve bearing (10) and bores in the housing (27); Axle sleeve (11) axle is provided with big driven gear (12), big driven gear (12) and big driving gear (24) engagement that is contained on the jackshaft (20).
2. a kind of magnetic force electric hammer that can offset additional magnetic moment of torsion according to claim 1 bores; It is characterized in that: described little permanent magnet rings (9), big permanent magnet rings (8) and driven permanent magnet rings (7) all along the circumferential direction have the N utmost point, the S utmost point alternately arranged of similar number, and each magnetic pole right angle of circumference equal.
3. a kind of magnetic force electric hammer that can offset additional magnetic moment of torsion according to claim 1 bores; It is characterized in that: the speed reducing ratio between described big driving gear (24) and big driven gear (12) is identical with the speed reducing ratio between little driven gear (13) with the small active gear (22) that connects through idle pulley (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205225639U CN202378013U (en) | 2011-12-14 | 2011-12-14 | Magnetic electric hammer drill capable of canceling additional magnetic torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205225639U CN202378013U (en) | 2011-12-14 | 2011-12-14 | Magnetic electric hammer drill capable of canceling additional magnetic torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202378013U true CN202378013U (en) | 2012-08-15 |
Family
ID=46626533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205225639U Withdrawn - After Issue CN202378013U (en) | 2011-12-14 | 2011-12-14 | Magnetic electric hammer drill capable of canceling additional magnetic torque |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202378013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490161A (en) * | 2011-12-14 | 2012-06-13 | 浙江大学 | Magnetic electric hammer drill capable of offsetting additional magnetic torque |
-
2011
- 2011-12-14 CN CN2011205225639U patent/CN202378013U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102490161A (en) * | 2011-12-14 | 2012-06-13 | 浙江大学 | Magnetic electric hammer drill capable of offsetting additional magnetic torque |
| CN102490161B (en) * | 2011-12-14 | 2013-11-20 | 浙江大学 | Magnetic electric hammer drill capable of offsetting additional magnetic torque |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120815 Effective date of abandoning: 20131120 |
|
| RGAV | Abandon patent right to avoid regrant |