CN100571980C - Grinder - Google Patents
Grinder Download PDFInfo
- Publication number
- CN100571980C CN100571980C CNB2006101621423A CN200610162142A CN100571980C CN 100571980 C CN100571980 C CN 100571980C CN B2006101621423 A CNB2006101621423 A CN B2006101621423A CN 200610162142 A CN200610162142 A CN 200610162142A CN 100571980 C CN100571980 C CN 100571980C
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- China
- Prior art keywords
- mentioned
- main shaft
- bearing
- dust proof
- proof member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Gear Transmission (AREA)
Abstract
A kind of grinder, the hexagon socket head cap screw (11) of Bolt Connection upper casing (9) and bearing housing (10) is screwed into from upper casing (9) side, and on main shaft (12), form respectively and engage and limit the large-diameter portion (21) of its lower position with labyrinth ring (22), and engage and limit the middle footpath portion (20) of its lower position with ball bearing (16), the flat face (24) by main shaft (12) side and the planar portions of labyrinth ring (22) side chimeric, main shaft (12) is combined on direction of rotation with labyrinth ring (22), and load onto labyrinth ring (22) outside successively from the top of main shaft (12) side, ball bearing (16), and second bevel gear (14), and from last direction main shaft (12) screw thread of second bevel gear (14) in conjunction with nut (30), thereby between middle footpath portion (20) and nut (30), limit ball bearing (16) and second bevel gear (14) moving in the axial direction respectively.Thus, the assembling operation of front end shell can be simplified, and the raising of productivity ratio can be realized.
Description
Technical field
The present invention relates to a kind of grinder that the disc emery wheel is installed vertical configuration on main shaft outstanding below the forward end housing.
Background technology
In the grinder, in the front end shell that the upper casing that will be cut apart up and down and lower casing Bolt Connection form,, along the vertical direction main shaft is carried out the axle supporting, and can the disc emery wheel be installed in the main shaft lower end that protrudes in below the lower casing by being located at the bearing in the lower house.On main shaft, by keyway in conjunction with or two flat chimeric etc. combined structure, but one is outer rotatably bevel gear is housed, and from outstanding motor output shaft is delivered to rotation on the bevel gear towards the place ahead in front end shell.
And, invade the bearing side of main shaft in order to prevent dust, side below the lower casing of main shaft, but by the outer rotatably discoidal dust proof member (for example with reference to patent documentation 1) of periphery near lower casing that be equipped with of the second combined structure one.As this second combined structure, adopt the structure that is pressed on the main shaft usually.
And the number of assembling steps of front end shell is as follows, is pressed into dust proof member to main shaft at first separately that is:, assemble bearing and lower casing thereafter on main shaft, and in conjunction with bevel gear, assemble lower casing and upper casing at last, and side is carried out bolting below lower casing.
[patent documentation 1] TOHKEMY 2001-9757 communique (Fig. 2)
As mentioned above, the assembling operation of front end shell by dust proof member be pressed into and the assembling of each parts, the different operations such as bolting of carrying out from the below are formed, therefore assembling required time becomes longer, operation is numerous and diverse, and production efficiency is relatively poor.Especially when carrying out bolting, when the grinder that will try assembling turns over, occur sometimes going up that lower house staggers or the situation of element falling, thereby cause the loss of activity duration from the below.
Summary of the invention
So, the object of the present invention is to provide a kind of assembling operation of front end shell and the grinder that can suitably boost productivity simplified.
For reaching above-mentioned purpose, technical scheme 1 described invention is characterised in that, the bolt member of lower house on the Bolt Connection is screwed into from last shell-side, and on main shaft, form the junction surface that engages and limit its lower position with dust proof member respectively, with second junction surface that engages and limit its lower position with bearing, second combined structure is formed by flat face and planar portions, the externally mounted part that this flat face is formed on the dust proof member of main shaft divides, this planar portions be formed on interior week of dust proof member with the corresponding position of flat face on, and from the top of main shaft successively outside dress dust proof member and bearing and bevel gear, and from the last direction spindle thread of bevel gear in conjunction with nut, thus, between second junction surface and nut, limit bearing and bevel gear moving in the axial direction respectively.
The grinder that technical scheme 1 relates to, upper casing and the lower casing cut apart up and down by Bolt Connection form, and be extruded with in inside on the front end shell of output shaft of motor in the lower house, by being located at the above-mentioned bearing of going up lower house respectively, along the vertical direction main shaft is carried out the axle supporting, and can protrude in above-mentioned lower casing below the lower end of above-mentioned main shaft the disc emery wheel is installed, but on above-mentioned main shaft, be equipped with outside rotatably from the gear of above-mentioned output shaft transmission rotation by the combined structure one, and but side is equipped with the dust proof member of periphery near above-mentioned lower casing outside rotatably by the second combined structure one below the above-mentioned lower casing of above-mentioned main shaft, it is characterized in that, the above-mentioned bolt member of going up lower house of Bolt Connection is screwed into from the above-mentioned shell-side of going up, and, on above-mentioned main shaft, form the junction surface that engages and limit its lower position with above-mentioned dust proof member, above-mentioned second combined structure is formed by flat face and planar portions, the externally mounted part that this flat face is formed on the above-mentioned dust proof member of above-mentioned main shaft divides, this planar portions be formed on interior week of above-mentioned dust proof member with the corresponding part of above-mentioned flat face on, load onto the bearing of stating dust proof member and being arranged at lower house from the top of above-mentioned main shaft outside successively, and said gear, and from the top of said gear to above-mentioned spindle thread in conjunction with nut, thus, between above-mentioned junction surface and nut, limit above-mentioned bearing that is arranged at lower house and gear moving in the axial direction respectively.
In the technical scheme 2 described inventions, on the basis of the purpose of technical scheme 1, in order dust proof member not to be caused burden and spring bearing and gear, be formed with second junction surface above the junction surface in main shaft, this second junction surface with not with the size of interior all interferences of dust proof member, engage and limit its lower position with bearing.
The grinder that technical scheme 2 relates to, it is characterized in that, be formed with second junction surface above the junction surface on the main shaft, this second junction surface not to be engaging with the bearing that is arranged at lower house with the size of interior all interferences of dust proof member, and limits its lower position.
According to technical scheme 1 described invention, in front end shell, can be from lower house on the Bolt Connection of top, and can assemble all parts from the top.Therefore, can simplify the assembling operation of front end shell, save time and the labour, can expect the raising of productivity ratio.
According to technical scheme 2 described inventions, by second junction surface, can be from supported underneath bearing and gear, thus can not cause burden to dust proof member.Therefore, dust proof member be need not to make in order to ensure intensity metallic article, and cheap material manufacturing such as available synthetic resin.
Description of drawings
Fig. 1 is the longitudinal sectional view of grinder.
Fig. 2 is the vertical view of grinder.
Fig. 3 is the amplification view of gear-box part.
Fig. 4 is the key diagram (last figure is A-A line cross section, and figure below is B-B line cross section) of labyrinth ring.
Reference numeral is described as follows:
1 grinder, 2 motor cases, 3 commutator machines, 4 output shafts, 6 gear-boxes, 9 upper casings, 10 bearing housings, 11 hexagon socket head cap screws, 12 main shafts, 14 second bevel gears, 15,16 ball bearings, 19 disc emery wheels, footpath portion in 20,21 large-diameter portions, 22 labyrinth rings, 23 through holes, 28 retainers, 30 nuts.
The specific embodiment
Below, based on accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the longitudinal sectional view of an example of expression grinder, Fig. 2 is a vertical view, in the grinder 1, the place ahead (Fig. 1 left side) at the motor case 2 that accommodates commutator machine 3, carry out the gear-box 6 of shaft bearing plate 5 assemblings of axle supporting across output shaft 4, and assemble back cover 7 in the wings as front end shell to commutator machine 3.The 8th, be arranged at the side of motor case 2, and the sliding button that the switches that are located in the back cover 7 is carried out open and close by slide.
Gear-box 6, and is constituted and to comprise on motor case 2 by bolting: at the upper casing 9 of lower opening; Be fixed thereon the bearing housing 10 on the lower opening of shell 9, as shown in Figure 3, be that hexagon socket head cap screw 11,11 is screwed in the lower casing 10 by top with bolt member, and both are formed as one from upper casing 9 as lower casing.
And, in gear-box 6, when output shaft 4 is given prominence to, main shaft 12 is gone up in the place ahead of this output shaft 4 along the vertical direction by the axle supporting, and second bevel gear, 14 engagements that make first bevel gear 13 that combines with the front end of output shaft 4 and be combined into one with main shaft 12, thus, the rotation of output shaft 4 can be passed to main shaft 12.With regard to main shaft 12,15 supportings of ball bearing of its upper end by keeping by upper casing 9, the position, intermediate portion is 16 supportings of ball bearing by the bearing that is kept by bearing housing 10, its lower end is outstanding to the below of bearing housing 10.In the lower end of this main shaft 12, by inner flange 17 and outward flange 18 vertical configurations disc emery wheel 19 is installed.
The lower portion of the ball bearing 16 in main shaft 12 forms diameter is big more middle footpath portion 20 and two stage diameters of large-diameter portion 21 more downwards, is provided with the labyrinth ring 22 as dust proof member here.As shown in Figure 4, this labyrinth ring 22 has through hole 23 on the axle center, it is chimeric with the large-diameter portion 21 of main shaft 12 that this through hole 23 has the below, and two chimeric stage diameters of top and middle footpath portion 20, rank portion by through hole 23 connects with large-diameter portion 21 as the junction surface, limits its lower position.At this moment, middle footpath portion 20 not with through hole 23 interferences of labyrinth ring 22, allow top moving to the lower position from labyrinth ring 22.
And large-diameter portion 21 is provided with a pair of flat facial 24,24 on point-symmetric position, and its cross section becomes two flat, and the through hole 23 of labyrinth ring 22 also is formed in two flat that is formed with planar portions 25,25 on the position corresponding with flat facial 24,24.Therefore, by as each other chimeric of the two flat face of second combined structure, but and labyrinth ring 22 is combined rotatably with main shaft 12 one.Under the installment state of this labyrinth ring 22, the upright rising portions 26 of being located at outer peripheral edges be arranged with endless groove 27 below bearing housing 10 and move about chimericly, and be used for the dustproof of ball bearing 16 sides.
On the other hand, middle footpath portion 20 butts that become second junction surface of ball bearing 16 and main shaft 12, and its lower position is restricted, the upper surface of labyrinth ring 22 is near below the ball bearing 16, and becomes contactless state with ball bearing 16.On the outer circumferential side of ball bearing 16, butt has periphery to be clamped in the bearing bracket stand 28 of the mortar shape between upper casing 9 and the bearing housing 10.
And gear of the present invention i.e. second bevel gear 14, in the same manner chimeric with the large-diameter portion 21 of main shaft 12 and labyrinth ring 22, by each other chimeric of the promptly two flat faces of combined structure, but and combine rotatably with main shaft 12 one, and its lower end and ball bearing 16 connect.Above second cone bearing 14, screw thread is combined with nut 30 on the bolt part 29 that is formed at main shaft 12, and by being screwed into nut 30, second bevel gear 14 can be pushed downwards.
In grinder 1 as constituted above, during Assembling gear case 6, at first relative main shaft 12, from the top successively outside dress labyrinth ring 22, bearing housing 10, ball bearing 16, bearing bracket stand 28, second bevel gear 14, at last nut 30 is screwed into bolt part 29, like this, labyrinth ring 22, ball bearing 16, second bevel gear 14 vertically mobile restricted system between large-diameter portion 21 and nut 30, each parts is assembled on the main shaft 12 thus.And, at the upper end of main shaft 12 assembling ball bearing 15, make upper casing 9 cover bearing housings 10, thus clamp axis bolster 28, and with hexagon socket head cap screw 11 from top Bolt Connection upper casing 9 and bearing housing 10, finish the assembling of gear-box 9 thus.At last, its bolting is got final product on motor case 2 sides.
Like this, grinder 1 according to aforesaid way, hexagon socket head cap screw 11 with Bolt Connection upper casing 9 and bearing housing 10, be screwed into from upper casing 9 sides, on main shaft 12, form in addition and engage and limit the large-diameter portion 21 of its lower position with labyrinth ring 22, and by being formed at flat facial 24 of main shaft 12, form second combined structure with the planar portions 25 in the interior week that is formed at labyrinth ring 22, and from the top of main shaft 12 successively outside dress labyrinth ring 22 and ball bearing 16, and second bevel gear 14, and top Bolt Connection nut 30 on main shaft 12 from second bevel gear 14, thereby limit moving axially of the ball bearing 16 between large-diameter portion 21 and the nut 30 and second bevel gear 14 respectively, thus, in gear-box 6, can be from top Bolt Connection upper casing 9 and bearing housing 10, and can carry out the assembling of all parts from the top.Thus, can simplify the assembling operation of gear-box 6, save time and the labour, can expect the raising of productivity ratio.
Especially here, above the large-diameter portion 21 of main shaft 12, with not with the size of interior all interferences of labyrinth ring 22, form the middle footpath portion 20 that engages and limit its lower position with ball bearing 16, thus, can be by middle footpath portion 20 from the supported underneath ball bearing 16 and second bevel gear 14, thus can not cause burden to labyrinth ring 22.Therefore, need not labyrinth ring 22 to be made metallic article, and the material of cheapnesss such as available synthetic resin is made in order to ensure intensity.
And, in above-mentioned form, the junction surface and second junction surface are made of the large-diameter portion and the middle footpath portion that are located on the main shaft respectively, but also can on the side face of main shaft, dash forward and establish projection or prominent bar by the diameter that does not change main shaft, or make the two ends of on diametric(al), inserting logical pin outstanding, form the junction surface and second junction surface.In addition, also can cancel second junction surface, and the purpose of only utilizing the junction surface stretch out upward and dust proof member to reach the lower position of restriction bearing.
And, be not limited to the setting in pairs of point symmetry ground in conjunction with the flat face and the planar portions of dust proof member, even only establish a place, perhaps setting up on the contrary is more than three places, and becomes near roughly polygonal chimeric, also has not big harm.
And, be not limited to ball bearing as bearing, also can be other bearings of needle bearing or metal etc., and gear also be not limited to bevel gear, also can be other gears of spiral bevel gear or helical gear etc.
And, gear and the combined structure of main shaft also can adopt the keyways beyond two flat to combine or spline in conjunction with waiting other combined structures.
Claims (2)
1. grinder, upper casing and the lower casing cut apart up and down by Bolt Connection form, and inside be extruded with motor output shaft in the lower house, by being located at the above-mentioned bearing of going up lower house respectively, along the vertical direction main shaft is carried out the axle supporting, and can protrude in above-mentioned lower casing below the lower end of above-mentioned main shaft the disc emery wheel is installed, but on above-mentioned main shaft, be equipped with outside rotatably from the gear of above-mentioned output shaft transmission rotation by the combined structure one, and but side is equipped with the dust proof member of periphery near above-mentioned lower casing outside rotatably by the second combined structure one below the above-mentioned lower casing of above-mentioned main shaft, this grinder is characterised in that
The above-mentioned bolt member of going up lower house of Bolt Connection is screwed into from the above-mentioned shell-side of going up, and,
On above-mentioned main shaft, form the junction surface that engages and limit its lower position with above-mentioned dust proof member, above-mentioned second combined structure is formed by flat face and planar portions, the externally mounted part that this flat face is formed on the above-mentioned dust proof member of above-mentioned main shaft divides, this planar portions be formed on interior week of above-mentioned dust proof member with the corresponding part of above-mentioned flat face on
Load onto bearing and the said gear of stating dust proof member and being located at lower house from the top of above-mentioned main shaft outside successively, and from the top of said gear to above-mentioned spindle thread in conjunction with nut, thus, between above-mentioned junction surface and nut respectively restriction be located at the bearing of lower house and gear moving in the axial direction.
2. grinder according to claim 1, it is characterized in that, be formed with second junction surface above the junction surface on the main shaft, this second junction surface not to be engaging with the bearing of being located at lower house with the size of interior all interferences of dust proof member, and limits its lower position.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005353949A JP4708989B2 (en) | 2005-12-07 | 2005-12-07 | Grinder |
| JP2005353949 | 2005-12-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1978134A CN1978134A (en) | 2007-06-13 |
| CN100571980C true CN100571980C (en) | 2009-12-23 |
Family
ID=38129527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101621423A Expired - Fee Related CN100571980C (en) | 2005-12-07 | 2006-12-06 | Grinder |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4708989B2 (en) |
| CN (1) | CN100571980C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794693A (en) * | 2011-05-23 | 2012-11-28 | 株式会社牧田 | Water-proof sheet and water injection electric tool provided with same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7096032B2 (en) * | 2018-03-28 | 2022-07-05 | 株式会社マキタ | Multi tool |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3328955A1 (en) * | 1983-08-11 | 1985-02-21 | Robert Bosch Gmbh, 7000 Stuttgart | ANGLE GRINDERS WITH A SAFETY CLUTCH |
| JPH0673802B2 (en) * | 1986-10-08 | 1994-09-21 | 株式会社芝浦製作所 | Disk grinder |
| JPH0453666A (en) * | 1990-06-21 | 1992-02-21 | Shibaura Eng Works Co Ltd | Motor-driven tool |
| JPH07299606A (en) * | 1994-04-28 | 1995-11-14 | Hitachi Koki Co Ltd | Bearing dustproof structure |
| DE19831542A1 (en) * | 1998-07-14 | 2000-01-20 | Bosch Gmbh Robert | Chucks, in particular suitable for power tool with rotating disk-shaped tool, e.g. angle grinder or circular saw, are fitted with specific spring in order hold rabbet ring tensioned to chuck flange |
| JP2000108056A (en) * | 1998-10-05 | 2000-04-18 | Makita Corp | Electric tool |
| JP3731802B2 (en) * | 2000-05-19 | 2006-01-05 | 株式会社マキタ | Sanda |
-
2005
- 2005-12-07 JP JP2005353949A patent/JP4708989B2/en active Active
-
2006
- 2006-12-06 CN CNB2006101621423A patent/CN100571980C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794693A (en) * | 2011-05-23 | 2012-11-28 | 株式会社牧田 | Water-proof sheet and water injection electric tool provided with same |
| CN102794693B (en) * | 2011-05-23 | 2014-12-10 | 株式会社牧田 | Water-proof sheet and water injection electric tool provided with same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4708989B2 (en) | 2011-06-22 |
| JP2007152525A (en) | 2007-06-21 |
| CN1978134A (en) | 2007-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20201206 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |