CN204621768U - Throw - Google Patents
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- CN204621768U CN204621768U CN201520251059.8U CN201520251059U CN204621768U CN 204621768 U CN204621768 U CN 204621768U CN 201520251059 U CN201520251059 U CN 201520251059U CN 204621768 U CN204621768 U CN 204621768U
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- main shaft
- housing
- bearing
- seal member
- motor
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Abstract
The utility model provides a kind of throw, even if it also can keep the sealing of seal member for a long time when main shaft generation axial play.Cutting machine (1) is provided with: housing; Motor (6), it is housed in housing; Main shaft (8), its part is housed in housing, and drives rotation by motor (6), and it can install tip end tool (T) from the end that housing is given prominence to; O shape ring (38), it is arranged on the periphery of main shaft (8), the gap (S) on the axial direction being positioned at main shaft (8) between the front wall portion (36) and the medial flange portion (31) of main shaft (8) of sealed bearing guard ring (24); Wave washer (39), for axially exerting a force to pushing O shape ring (38) side to main shaft (8) at main shaft (8).
Description
Technical field
The utility model relates to a kind of throw, and as cutting machine etc., it is provided with tip end tool on the main shaft rotated by motor driving.
Background technology
In the throws such as cutting machine, the rotation of the output shaft of motor passes to the main shaft different from output shaft main body via gear, the discoid tip end tool be arranged on main shaft is rotated thus carries out the operations such as cutting (such as with reference to non-patent literature 1).Fig. 4 is the enlarged drawing of the main shaft portion of cutting machine 50 of the prior art, the output shaft 52 receiving the motor of dress in mode is toward the front outstanding in the housing 51 of front side, and, the main shaft 53 being parallel to output shaft 52 is supported in the housing 51 of front side, and the pinion 54 being fixed on the top of output shaft 52 is meshed with the gear 55 at the rear being fixed on main shaft 53.This main shaft 53 is supported by the bearing 57 of front side and the bearing 59 of rear side, and this main shaft 53 can rotate, wherein, the bearing 57 of front side is kept by the bearing retaining ring 56 be installed to from front on housing 51, the bearing 59 of rear side is kept by the recess 58 that housing 51 is formed, by medial flange portion 60, outboard flanges portion 61 and bolt 62, the tip end tool T of skive etc. can be installed in the leading section outstanding from bearing retaining ring 56 of this main shaft 53.
Further, the periphery of the part between bearing retaining ring 56 and medial flange portion 60 of main shaft 53 is provided with O shape ring 63, the dust produced time to prevent from carrying out cutting operation etc. etc. are from invading bearing 57 side between main shaft 53 and bearing retaining ring 56.
[non-patent literature 1] herds field composite merchandise catalogue 2014-4,68 pages, rechargeable cutting machine CC300DW etc. (retrieval day: Heisei on June 30th, 26, retrieval address: http://www.makita.co.jp/product/ecatalog/sougou/index.html#68)
In this cutting machine 50, sometimes due to component tolerance etc., small axial play can be there is in main shaft 53, this loosens and the gap S being provided with O shape ring 63 between bearing retaining ring 56 and medial flange portion 60 is changed, if gap S becomes large, the sealing of O shape ring 63 reduces, if gap S diminishes, O shape ring 63 can be caused the deteriorations such as wearing and tearing to be accelerated by excessively pushing.
Utility model content
Therefore, the purpose of this utility model is to provide a kind of throw, in this throw, even if main shaft generation axial play, also can keep the sealing of the seal members such as O shape ring for a long time.
For reaching described object, the technical solution of the utility model 1 is that throw has: housing; Motor, it is housed in housing; Main shaft, its part is housed in housing, and drives rotation by motor, and it can install tip end tool from the end that housing is given prominence to; Seal member, it is arranged on the periphery of main shaft, for the gap being axially positioned at main shaft between seal casinghousing and main shaft; Force application mechanism, it exerts a force to the side of main axial push seal member in the axial direction.
The technical solution of the utility model 2 adopts following structure: on the basis of technical scheme 1, and seal member is O shape ring.
The technical solution of the utility model 3 adopts following structure: on the basis of technical scheme 1 or technical scheme 2, bearing is maintained in housing, this bearing is used for supporting spindle, and this main shaft can rotate, force application mechanism is wave washer, it is positioned at the maintaining part of bearing, is configured between housing and bearing.
The technical solution of the utility model 4 adopts following structure: on the basis of technical scheme 3, and bearing is enclose the rolling bearing being furnished with rolling element between outer ring within it, and wave washer is contacted with outer ring and exerted a force to main shaft by bearing.
For reaching described object, the technical solution of the utility model 5 is that throw has: housing; Motor, it is housed in housing; Main shaft, its part is housed in housing, and drives rotation by motor, and it can install tip end tool from the end that housing is given prominence to; Seal member, it is arranged on the periphery of main shaft, for the gap being axially positioned at main shaft between seal casinghousing and main shaft; Maintain mechanism, it makes the corresponding gap between housing with main shaft keep certain.
The technical solution of the utility model 6 adopts following structure: on the basis of technical scheme 5, and maintaining mechanism is force application mechanism, and it exerts a force to the side of main axial push seal member in the axial direction.
For reaching described object, the technical solution of the utility model 7 is that throw has: rotating part; Fixed part, it keeps rotating part; Seal member, it is configured between rotating part and fixed part; Force application mechanism, it exerts a force to fixed part to rotating part.
Adopt technical scheme 1,5 and 7, even if there is axial play in main shaft (rotating part), also the gap between housing (fixed part) and main shaft can be made to keep certain by force application mechanism, keep the sealing of the seal members such as O shape ring therefore, it is possible to permanent.
Adopting technical scheme 2, except the effect in technical scheme 1, by using O shape ring as seal member, suitable seal member can be used to seal between housing and main shaft.
Adopt technical scheme 3, except the effect in technical scheme 1 or 2, by using wave washer as force application mechanism, can adopt and save space and the force application mechanism of low cost.
Adopt technical scheme 4, except the effect in technical scheme 3, the outer ring of rolling bearing can also be utilized with carrying out advantages of simple to exert a force to main shaft.
Adopt technical scheme 6, except the effect in technical scheme 5, can also by maintaining gap simply to main shaft force.
Accompanying drawing explanation
Fig. 1 is the longitudinal section of cutting machine.
Fig. 2 is the enlarged drawing of main shaft portion.
Fig. 3 is the stereogram of wave washer.
Fig. 4 is the enlarged drawing of the main shaft portion of cutting machine of the prior art.
[description of reference numerals]
1: cutting machine; 2: pedestal; 3: main body; 4: motor housing; 5: procapsid; 6: motor; 7: output shaft; 8: main shaft; 11: cover portion; 15,16,25,27: bearing; 20: minor diameter part; 21: central diameter portion; 22: large-diameter portion; 23: flange part; 24: bearing retaining ring; 25a: inner ring; 25b: outer ring; 26: recess; 28: gear; 31: medial flange portion; 32: outboard flanges portion; 36: front wall portion; 36a: conical section; 36b: thin-walled portion; 37: protuberance; 38:O shape ring; 39: wave washer.
Detailed description of the invention
With reference to the accompanying drawings embodiment of the present utility model is described.
Fig. 1 is the longitudinal section of the cutting machine of an example as a kind of throw, in cutting machine 1, the pedestal 2 overlooking rectangular shape is assembled with main body 3, wherein main body 3 has motor 6 and main shaft 8, and can install discoid tip end tool T (skive etc.) in the front end (with the left side in Fig. 1 for front) of main shaft 8.In main body 3, the procapsid 5 of main shaft 8 is kept to be fixed on the front of motor housing 4 from rear by multiple screw 9, wherein, motor housing 4 receives dress motor 6, and this motor 6 toward the front, the top of motor housing 4 is connected with handle 10, wherein, is built-in with the switch do not shown in figure and is provided with the battery pack as power supply in handle 10.Procapsid 5 has cover portion 11, and this cover portion 11 circumferentially covers the upper portion of the tip end tool T be arranged on main shaft 8, and the below that the lower portion of tip end tool T is arranged at this tip end tool T to pedestal 2 under the state on main shaft 8 is outstanding.
Pedestal 2 and main body 3 are interconnected by the axle (not shown) being located at procapsid 5 left and right sides, and pedestal 2 can rotate relatively with main body 3, the axle on right side can slide up and down along the arc-shaped degree of depth guide member (not shown) vertically set up on the base 2, and can be fixed in the optional position on degree of depth guide member by the turn-knob screw be located on this axle.Like this, the overhang (approach) of tip end tool T from pedestal 2 can be adjusted by adjusting this fixed position.
In addition, in main body 3, can slide along the arc-shaped guide groove of guide member (not shown) before being connected with the left side of pedestal 2 in the position, rear of the axle in left side, and, the optional position on guide groove can be fixed in by the turn-knob screw be located on this position.Like this, the angle of tip end tool T-phase for pedestal 2 can be adjusted.
Motor 6 is commutator (commutator) formula motor, its by the stator 12 remained in motor housing 4 and this stator 12 through and the rotor 13 that rear is provided with commutator 14 form, the front-end and back-end being located at the output shaft 7 of the center of rotor 13 are supported by bearing 15 and bearing 16 respectively, wherein, bearing 15 is maintained at the rear of procapsid 5, bearing 16 is maintained on the inner surface at the rear portion of motor housing 4, the top of this output shaft 7 is outstanding in procapsid 5 through bearing 15, this top is fixed with pinion 17.In addition, be fixed with centrifugal fan 18 at the rear side of bearing 15, the leading section of motor housing 4 is provided with deep bead 19, and this deep bead 19 surrounds the outside of centrifugal fan 18, guides air forwards to flow.Like this, by the rotation of centrifugal fan 18 from the air that the air entry (not shown) be located at after motor housing 4 sucks, flowing through motor 6 and after motor 6 is cooled, be directed to procapsid 5 side by deep bead 19, discharge from exhaust outlet (not shown).
As shown in Figure 2, steps change is large from back to front according to the order of minor diameter part 20, central diameter portion 21, large-diameter portion 22 for the external diameter of main shaft 8, between central diameter portion 21 and large-diameter portion 22, is circumferentially provided with the flange part 23 larger with large-diameter portion 22 phase diameter group.In the below of output shaft 7, the through bearing retaining ring 24 of main shaft 8 is assembled into procapsid 5 from front, and the bearing 25 remained in this bearing retaining ring 24 is fixed in the central diameter portion 21 of main shaft 8.In addition, minor diameter part 20 is fixed with the bearing 27 remained in recess 26, its center dant 26 is formed on the inner surface of the rear side of procapsid 5, and main shaft 8 is supported in the front of output shaft 7 and is parallel to output shaft 7, and its large-diameter portion 22 and flange part 23 are forwards given prominence to than bearing retaining ring 24.At the rear of bearing 25, gear 28 is fixed in central diameter portion 21, and is meshed with the pinion 17 of output shaft 7.
The bearing 25 of front side is positioned at the front end in central diameter portion 21, and the rear surface of its inner ring 25a and flange part 23 abuts against, and the inner peripheral surface of outer ring 25b and bearing retaining ring 24 slidingly contacts.Gear 28 is the state abutted against with the rear surface of packing ring 29, limits it rearward move by the locating snap ring 30 of the rear end being located at central diameter portion 21, and wherein, packing ring 29 abuts against with the rear surface of inner ring 25a.Like this, bearing 25, packing ring 29, this three of gear 28 are between flange part 23 and locating snap ring 30, and this three movement is in front-rear direction restricted, consistent in a rotational direction with main shaft 8 in this condition.
The bearing 27 of rear side is positioned at the front end of minor diameter part 20, and the rear surface in its inner ring 27a and central diameter portion 21 abuts against, and the inner peripheral surface of its outer ring 27b and recess 26 slidingly contacts.
In addition, on the large-diameter portion 22 of main shaft 8, tip end tool T can be installed by discoid medial flange portion 31 and outboard flanges portion 32.Namely, make the cylindrical portion 33 of the middle position being located at medial flange portion 31 chimeric with large-diameter portion 22, and the rear surface of this cylindrical portion 33 and flange part 23 are abutted against, in this condition, make the centre bore of tip end tool T chimeric with cylindrical portion 33, cover on cylindrical portion 33 from its front by outboard flanges portion 32, pass the center in outboard flanges portion 32 and medial flange portion 31 by making bolt 34 and be screwed in the screw 35 on the axle center being arranged on main shaft 8, thus make tip end tool T be clamped between medial flange portion 31 and outboard flanges portion 32, be fixed together with main shaft 8.
And bearing retaining ring 24 has: front wall portion 36, it is in the form of annular discs, and between the bearing 25 and medial flange portion 31 of front side, inner circumferential surface extends to the flange part 23 close to main shaft 8; Protuberance 37, its front, lateral in medial flange portion 31 is given prominence to, and overlapped with the outer peripheral face in medial flange portion 31 under the state of the outer peripheral face near medial flange portion 31.Wherein, the front portion of front wall portion 36 forms conical section 36a, the thickness of this conical section 36a middle part is in the radial direction more then thinner close to center, for front wall portion 36 and both medial flange portions 31 gap in the longitudinal direction, the gap S near the thin-walled portion 36b place of flange part 23 is maximum.In gap S between this medial flange portion 31 and thin-walled portion 36b of front wall portion 36, the O shape ring 38 as seal member is arranged on the periphery of flange part 23, seals between medial flange portion 31 and front wall portion 36.
In addition, at the rear of front wall portion 36, between itself and the bearing 25 of front side, be provided with the wave washer 39 as force application mechanism.As shown in Figure 3, this wave washer 39 is the ring body along its circumferential undulate, and it is clipped between front wall portion 36 and bearing 25, is compressed in the axial direction thus abuts against with outer ring 25b, is produced the elastic force rearward exerted a force to main shaft 8 by bearing 25.So, for main shaft 8, even if produce axial play due to component tolerance, also can by the elastic force of wave washer 39, the rear position abutted against to the bottom surface with recess 26 pushes the bearing 27 of rear side.Thus, the gap S between the thin-walled portion 36b of medial flange portion 31 and front wall portion 36 keeps certain, and O shape ring 38 always with equal state compression, thus seals between medial flange portion 31 and front wall portion 36.
In addition, also wave washer 39 can being considered as a kind of maintenance mechanism, namely suppressing by rearward exerting a force to main shaft 8 it to occur to loosen, thus make the gap S between the thin-walled portion 36b of medial flange portion 31 and front wall portion 36 keep certain.
In cutting machine 1 as constructed as above, pedestal 2 is being placed under the state on machined material, pressing operation is carried out to the trigger (not shown) of establishing on the handle 10, thus the switch opened in handle 10, to be powered to motor 6 by battery pack thus rotor 13 is rotated, this rotation is afterwards slowed down via gear 28 by the pinion 17 of output shaft 7, and the rotation after deceleration is delivered to main shaft 8.Like this, and the tip end tool T of main shaft 8 one rotates, thus can carry out the operations such as cutting to machined material.
At this moment, the dust produced because cutting waits is discharged from the side after the direction of rotation of tip end tool T is circled round in cover portion 11, even if there is dust to move into the rear side of tip end tool T, because the protuberance 37 of bearing retaining ring 24 is overlapped with the outer peripheral face in medial flange portion 31, dust is also difficult to invade between medial flange portion 31 and the front wall portion 36 of bearing retaining ring 24.Even if dust invades between medial flange portion 31 and the front wall portion 36 of bearing retaining ring 24, be arranged so that the gap between medial flange portion 31 and front wall portion 36 bends in L-shaped on vertical section, so dust is difficult to arrive main shaft 8 side due to protuberance 37.
In addition, even if dust arrives main shaft 8 side, owing to having clamped O shape ring 38 between medial flange portion 31 and the front wall portion 36 of bearing retaining ring 24, therefore almost do not worried that dust invades the bearing 25 at its rear by front wall portion 36.Especially because main shaft 8 is rearward exerted a force by wave washer 39, thus inhibit the axial play of main shaft 8, gap S between the thin-walled portion 36b of therefore medial flange portion 31 and front wall portion 36 is kept necessarily, makes O shape ring 38 with equal state compression, maintains the sealing that it is suitable thus.
Like this, adopt the cutting machine 1 of described mode, this cutting machine 1 has: housing (motor housing 4, procapsid 5), and it is as fixed part; Motor 6, it is housed in housing; Main shaft 8, it is as rotating part, and its part to be housed in procapsid 5 and to drive rotation by motor 6, and tip end tool T can be installed in its end outstanding from procapsid 5; O shape ring 38, it is arranged on the periphery of main shaft 8, for sealing the gap S axially at main shaft 8 between the front wall portion 36 and the medial flange portion 31 of main shaft 8 of bearing retaining ring 24; Force application mechanism (wave washer 39) or maintenance mechanism (wave washer 39), described force application mechanism is used for axially exerting a force to main shaft 8 at main shaft 8, makes main shaft 8 push O shape ring 38, and described maintenance mechanism keeps certain for maintaining gap S.By adopting this structure, even if causing main shaft 8 to produce axial play due to component tolerance etc., also can maintain gap S by wave washer 39 and keeping certain, so the sealing of O shape ring 38 can be kept for a long time.
Especially, by using O shape ring 38 as seal member, suitable seal member can be used to seal between front wall portion 36 and medial flange portion 31.
In addition, by wave washer 39 being configured in as force application mechanism between front wall portion 36 and bearing 25 in the maintaining part (bearing retaining ring 24) of bearing 25, can adopting and save space and the force application mechanism of low cost.
In addition, because the outer ring 25b of wave washer 39 with the bearing 25 as rolling bearing contacts, and exerted a force by bearing 25 pairs of main shafts 8, therefore, it is possible to exert a force to main shaft 8 with utilizing the outer ring 25b advantages of simple of rolling bearing.
In addition, seal member is not limited to O shape ring, also can adopt the seal member of other kinds such as X-shaped ring.
And except wave washer, force application mechanism can adopt disc spring, helical spring, flat spring etc., also can adopt rubber elastomeric material.The setting position of force application mechanism is also not limited in bearing retaining ring, as long as just can be able to change main shaft force.Like this, force application mechanism is not limited to compression force, such as, exceptionally straight (stretchings) such as helical springs also can be considered to be arranged between rear-end of spindle and housing carry out stretched force-applying.
In addition, main shaft is also not limited to described mode, suitably can select, also can carry out design alteration to the mounting structure of tip end tool to the presence or absence of the setting of its external diameter or flange part.In the housing, the conical section of its bearing retaining ring and thin-walled portion inessential formation, also can make bearing retaining ring and procapsid etc. form one.
And, as maintenance mechanism, be not limited to the force application mechanism adopting and utilize spring etc., also can consider to arrange holding section in case side, by fastening limit main shaft movement in the axial direction with main shaft or with the bearing etc. of its one, thus the gap of seal member is made to keep certain.
In addition, throw is also not limited to cutting machine, use seal member by the gap sealed structure axially between housing and main shaft as long as have, except the portable throws such as the grinder that the output shaft of circular saw, main shaft and motor intersects vertically, the console mode throws such as bench circular saw also applicable the utility model.
In addition, non-essential is that the state contacted with main shaft or rotating part is arranged on its outside by seal member.Such as in described mode, O shape ring also can be kept by bearing retaining ring and away from main shaft.In addition, also can can't help bearing retaining ring, and keep seal member by medial flange portion.
Claims (7)
1. a throw, is characterized in that,
Have:
Housing;
Motor, it is housed in described housing;
Main shaft, its part is housed in described housing, and driven by described motor and rotate, it can install tip end tool from the end that described housing is given prominence to;
Seal member, it is arranged on the periphery of described main shaft, for sealing the gap being axially positioned at described main shaft between described housing and described main shaft;
Force application mechanism, it axially exerts a force to the side of seal member described in described main axial push described.
2. throw according to claim 1, is characterized in that,
Described seal member is O shape ring.
3., according to throw according to claim 1 or claim 2, it is characterized in that,
Maintain bearing in described housing, described bearing is for supporting described main shaft, and described main shaft can rotate,
Described force application mechanism is wave washer, and it is positioned at the maintaining part of described bearing, is configured between described housing and described bearing.
4. throw according to claim 3, is characterized in that,
Described bearing is enclose the rolling bearing being furnished with rolling element between outer ring within it, and described wave washer is contacted with described outer ring and exerted a force to described main shaft by described bearing.
5. a throw, is characterized in that,
Have:
Housing;
Motor, it is housed in described housing;
Main shaft, its part is housed in described housing, and driven by described motor and rotate, it can install tip end tool from the end that described housing is given prominence to;
Seal member, it is arranged on the periphery of described main shaft, for sealing the gap being axially positioned at described main shaft between described housing and described main shaft;
Maintain mechanism, it makes the described gap between described housing and described main shaft keep certain.
6. throw according to claim 5, is characterized in that,
Described maintenance mechanism is force application mechanism, and it axially exerts a force to the side of seal member described in described main axial push described.
7. a throw, is characterized in that,
Have:
Rotating part; Fixed part, it keeps described rotating part; Seal member, it is configured between described rotating part and described fixed part; Force application mechanism, it exerts a force to described fixed part to described rotating part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-139854 | 2014-07-07 | ||
| JP2014139854A JP2016016469A (en) | 2014-07-07 | 2014-07-07 | Rotary tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204621768U true CN204621768U (en) | 2015-09-09 |
Family
ID=54040829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520251059.8U Active CN204621768U (en) | 2014-07-07 | 2015-04-23 | Throw |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2016016469A (en) |
| CN (1) | CN204621768U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6716981B2 (en) * | 2016-03-15 | 2020-07-01 | 株式会社三洋物産 | Amusement machine |
| JP6716983B2 (en) * | 2016-03-15 | 2020-07-01 | 株式会社三洋物産 | Amusement machine |
| JP6716982B2 (en) * | 2016-03-15 | 2020-07-01 | 株式会社三洋物産 | Amusement machine |
-
2014
- 2014-07-07 JP JP2014139854A patent/JP2016016469A/en active Pending
-
2015
- 2015-04-23 CN CN201520251059.8U patent/CN204621768U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016016469A (en) | 2016-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |