CN103158071B - Grinder - Google Patents
Grinder Download PDFInfo
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- CN103158071B CN103158071B CN201210395434.7A CN201210395434A CN103158071B CN 103158071 B CN103158071 B CN 103158071B CN 201210395434 A CN201210395434 A CN 201210395434A CN 103158071 B CN103158071 B CN 103158071B
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- Prior art keywords
- installation portion
- engaging
- straight line
- protecting hood
- holding section
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Abstract
The invention provides a kind of grinder, by the mounting structure of runner protecting hood reasonably can be formed, reduce the overall dimensions size of grinder.Grinder of the present invention has: the main part with ring part (62); The runner protecting hood (40) on ring part can be arranged on; Runner protecting hood is fixedly remained on the holding member (60) on ring part.Runner protecting hood has the cylindrical portion (42) of the annular be arranged on ring part.Runner protecting hood holding member has the slide unit (71) engaged with cylindrical portion and the pressing portion (91) making holding section movement.Slide unit can be made to move for pressing portion and the engaging of the fastening state fastened at cylindrical portion and slide unit and cylindrical portion and slide unit is switched by between the engaging disarm state removed.Further, pressing portion leave the 1st straight line and with the 2nd straight line of the 1st straight line parallel on move linearly, described 1st straight line refers in the prescribed direction by the straight line at the center of cylindrical portion (42).
Description
Technical field
The present invention relates to a kind of grinder with runner protecting hood.
Background technology
A kind of motor-driven mill with security protection portion is disclosed in Japanese invention Patent Laid spy table 2006-521937.This security protection portion can be locked in multiple set angle position by clamping device.This clamping device extends along the length direction of the housing receiving dress motor, and configures towards rotary output axis.
In above-mentioned Japanese invention Patent Laid spy table 2006-521937, be provided with rotary output axis at the center of safty shield, the clamping device of motor-driven mill can move linearly in the radial direction of the central axis by this rotary output axis, between locking position and liberation position.Clamping device has the moving part carrying out moving linearly, the radial outside in the maximum diameter portion of safty shield must be configured in due to this moving part, thus, the increase (maximization) that such clamping device can cause the size of motor-driven mill is configured.
Prior art document
Patent document
Patent document 1: Japanese invention Patent Laid spy table 2006-521937
Summary of the invention
In view of this, the object of the present invention is to provide a kind of technology so that the mounting structure of runner protecting hood reasonably can be formed.
For achieving the above object, grinder of the present invention is: it has: the main part with the collar; The runner protecting hood on the described collar can be arranged on; Described runner protecting hood is fixedly remained on the holding member on the described collar.Described runner protecting hood has the installation portion of the annular be arranged on the described collar, and described holding member has the holding section engaged with described installation portion and the snap-action portion making the movement of described holding section.Holding section can be made to move for described snap-action portion and the engaging of the fastening state fastened in described installation portion and described holding section and described installation portion and described holding section is switched by between the engaging disarm state removed, and, described snap-action portion leave the 1st straight line and with the 2nd straight line of the 1st straight line parallel on move linearly, described 1st straight line refers in the prescribed direction by the straight line at the center of described installation portion.
Adopt the present invention, make snap-action portion leave the 1st straight line and the 2nd straight line being parallel to the 1st straight line moves linearly.This, compared with the structure of carrying out moving linearly on the 1st straight line, can reduce the size of the runner maintaining body comprising runner protecting hood and holding member.Namely, when employing makes snap-action portion carry out the structure moved linearly on the 1st straight line, the length dimension of runner protecting hood maintaining body on the bearing of trend of the 1st straight line is, the length dimension sum of the length dimension of the maximum outside diameter of installation portion and the movable area in snap-action portion.And adopt the present invention, because snap-action portion is leaving the 1st straight line and the 2nd straight line being parallel to the 1st straight line moves linearly, thus, runner protecting hood maintaining body length dimension in the prescribed direction can be shortened, shortening amount is, the difference of the diameter of the part of the configuration card closing operation parts of installation portion length in the prescribed direction and installation portion.Utilize the configuration structure of such runner protecting hood maintaining body can reduce the overall dimensions size of grinder.
A preferred embodiment of grinder of the present invention is: described holding section engages with the outer end of described installation portion, and this outer end is positioned at and is parallel to described 1st straight line and on straight line by the central area of described installation portion.
Adopt which, when snap-action portion is consistent with the moving direction of holding section, holding section and installation portion, the part of straight line intersection that parallels with the moving direction in the snap-action portion of the central area by this installation portion engages, thus holding section can be made stably to engage with installation portion.That is, by making the moving direction of holding section near the normal direction of installation portion thus holding section can being made stably to engage with installation portion.
The preferred embodiment of grinder of the present invention is: the engaging with described installation portion is removed to the medial movement of described installation portion in described holding section.
Adopt which, because holding section is to the medial movement of installation portion, thus, with structure from holding section to the outside movement of installation portion compared with, the appearance and size of grinder can be reduced.
The preferred embodiment of grinder of the present invention is: described holding section is made up of the multiple engaging inscape portions engaged with described installation portion.
Adopt the manner, because holding section is made up of multiple engaging inscape portion, thus can be kept installation portion, so can stably keep installation portion by multiple engaging inscape portion.
The preferred embodiment of grinder of the present invention is: described holding section is made up of the multiple engaging inscape portions engaged with described installation portion, engage inscape portion described at least one and remove the engaging with described installation portion to described installation portion medial movement, engage key element portion described in remaining and move to the outside of described installation portion and remove the engaging with described installation portion.
Adopt which, only need to make holding section to move to a direction relative to installation portion and multiple engaging inscape portion can be made to dodge respectively to the inner and outer of installation portion.That is, not needing holding section to carry out complicated move mode can the engaging of engagement release portion and installation portion.
The preferred embodiment of grinder of the present invention for: described snap-action portion is configured in, with the tangent line region corresponding to the tangent line of the described installation portion of described 1st straight line parallel, and this snap-action portion is parallel to this and tangentially moves linearly.
Adopt the manner, snap-action portion leaves the 1st straight line and is parallel to the tangent line region near the tangent line of the 1st straight line.Thus, in the position in configuration card closing operation portion, the length dimension of installation portion on the moving direction in snap-action portion can be roughly zero.So, the length dimension of runner protecting hood maintaining body on the direction being parallel to the 1st straight line can be shortened.
The preferred embodiment of grinder of the present invention is: described multiple engaging inscape portion is relative to the Central Symmetry of described installation portion.
If multiple engaging inscape portion is asymmetric relative to the center of installation portion, then the center of fiqure (center) in multiple engaging inscape portion and the center of installation portion inconsistent, thus holding member to installation portion carry out bias keep.On the other hand, adopt the manner, because multiple engaging inscape portion is relative to the Central Symmetry of described installation portion, thus holding member can stably keep installation portion.
The preferred embodiment of grinder of the present invention is: described runner protecting hood optionally can be configured on multiple different turned position by the rotation relative to the described collar, and described runner protecting hood can be arranged on the described collar and to be arranged in one that selects from described multiple turned position.Described installation portion has the multiple engaged parts engaged with described holding section, and described multiple engaged part is to be formed at equal intervals in the circumference of the annular section of described installation portion.Described multiple engaging inscape portion corresponds to selected described turned position and engages with in described multiple engaged part.
Adopt the manner, runner protecting hood bag remains on from the turned position selected in multiple turned position, thus, can correspond to the position that operating type changes runner protecting hood.In addition, multiple engaged part to be formed at equal intervals, corresponding to the turned position of selected runner protecting hood, multiple engaging inscape portion engages with corresponding engaged part, which thus, no matter in turned position, can both be kept installation portion by multiple engaging inscape portion.
The preferred embodiment of grinder of the present invention is: described holding member has the loading component loaded described snap-action portion.Described snap-action portion is undertaken moving by the active force overcoming described loading component and removes the engaging of described installation portion and described holding section.
Adopt the manner, when installation portion engages with holding section, loaded snap-action parts by loading component, thus, the effect that can prevent snap-action portion from surprisingly receiving external force causes installation portion to be removed with the engaging of holding section.
The preferred embodiment of grinder of the present invention is: described holding member has the inclination movement limiting unit engaging the inclination movement limiting described runner protecting hood with described installation portion.
Adopt the manner, because holding member has inclination movement limiting unit, thus can suppress the inclination of runner protecting hood.In addition, the vibration produced when grinder can be suppressed to be driven causes the inclination of runner protecting hood.
The preferred embodiment of grinder of the present invention is: described installation portion has the multiple engaged parts engaged with described holding section.Also there is the 1st elastomeric element engaged with described engaged part.Described 1st elastomeric element loads described installation portion on the direction of the centerline axis parallel with described installation portion.Described installation portion can rotate in the circumferential relative to the described collar, by the active force of described 1st elastomeric element, described installation portion is connected on the described collar.
Adopting the manner, by making installation portion rotate in the circumferential relative to the collar, thus runner protecting hood can be made to arrive multiple turned position.Further, the active force due to the 1st elastomeric element makes installation portion be connected on the collar, and thus, when installation portion can be suppressed to rotate in the circumferential, this installation portion is relative to the instability of the motion of the collar.In addition, by making the 1st elastomeric element be fastened on engaged part, thus the turned position of runner protecting hood can reliably be kept.That is, can reliably position in the circumferential runner protecting hood.
The preferred embodiment of grinder of the present invention is: also have on the direction of the centerline axis parallel with described installation portion by the 2nd elastomeric element that described holding member loads described installation portion.By the active force of described 2nd elastomeric element, described installation portion is connected on the described collar.
Adopt the manner, because the 2nd elastomeric element makes installation portion be connected on the collar by holding member, when installation portion thus can be suppressed to rotate in the circumferential, this installation portion is relative to the instability of the motion of the collar.
The preferred embodiment of grinder of the present invention is: described 1st elastomeric element and described 2nd elastomeric element are integrally formed.
Adopt the manner, because the 1st elastomeric element and the 2nd elastomeric element are made up of parts, thus, can the increasing of quantity of suppression component.
The preferred embodiment of grinder of the present invention is: described collar assigned position is in the axial direction formed with recess.Described holding member engages with described recess makes this holding member be prevented from described movement axially, but allows this holding member to move in the radial direction of the described collar.
Adopting the manner, owing to can be kept holding member by the recess be formed on the collar, thus not needing to arrange the parts for keeping holding member again.
Effect of the present invention
Adopt the present invention, a kind of technology can be provided thus reasonably can form the mounting structure of runner protecting hood.
Accompanying drawing explanation
Fig. 1 is the integrally-built sectional view of the grinder representing the specific embodiment of the present invention;
Fig. 2 is the top view of runner protecting hood;
Fig. 3 is the oblique view of the entirety of the mounting structure representing runner protecting hood;
Fig. 4 is the exploded perspective view of Fig. 3;
Fig. 5 is the oblique view of runner protecting hood installation portion;
Fig. 6 is the top view of Fig. 5;
Fig. 7 is the top view of Fig. 5;
Fig. 8 is the side view of Fig. 5;
Fig. 9 is the partial enlarged drawing of Fig. 1;
Figure 10 is the sectional view along X-X line in Fig. 1;
Figure 11 is the sectional view along XI-XI line in Fig. 1;
Figure 12 represents to make the slide unit in Figure 11 and push part produce the accompanying drawing of the state of movement;
Figure 13 represents the accompanying drawing making the slide unit in Figure 10 produce the state of movement;
Figure 14 is the sectional view being equivalent to Figure 11 of the 1st variation;
Figure 15 is the sectional view being equivalent to Figure 11 of the 2nd variation.
Description of reference numerals
1 grinder; 2 emery wheels; 10 main casings; 20 transmission mechanism housings; 30 back casings; 40 runner protecting hoods; 41 guard section; 42 cylindrical portion (installation portion); 43 protuberances; 44 engaging recessed parts (engaged part); 50 runner protecting hood installation portions; 60 runner protecting hood engaging parts; 61 pedestals; 62 ring parts (collar); 63 spindle through-holes; 64 gathering sills; 65 the 1st slots; 66 the 2nd slots (recess); 67 relief portion; 68 bolts; 70 runner protecting hood holding members (holding member); 71 slide units (holding section); 72 flat parts; 73 notch; 74 engaging protuberances (engaging inscape portion); 75 movement limiting portions (inclination movement limiting unit); 76 screws; 80 leaf springs; 81 fixed parts; 82 the 1st loading units (the 1st elastomeric element); 83 holding sections (the 1st elastomeric element); 84 the 2nd loading units (the 2nd elastomeric element); 90 push part; 91 pressing portion; 92 helical springs; 93 spring abutment; 94 guide rods; 95 bolts; 96 packing rings; 97 screws; 100 motors; 101 rotating shafts; 200 the 1st bevel gears; 201 the 2nd bevel gears; 202 main shafts; 300 power supply wiring portions; L1 straight line (the 1st straight line); L2 straight line (the 2nd straight line).
Detailed description of the invention
With reference to the accompanying drawings the specific embodiment of the present invention is described in detail.Present embodiment is example the present invention be applied on grinder.This grinder is the power tool of the emery wheel, cutting tool etc. had as grinding cutter, mask cutter etc., emery wheel, cutting tool is rotated thus can carry out the operation of grinding, cutting and cutting etc. to work piece.
As shown in Figure 1, the main body of grinder 1 is made up of with runner protecting hood 40 etc. main casing 10, transmission mechanism housing 20, back casing 30.
Main casing 10 is housing roughly cylindrically, wherein receives and is filled with motor 100.The rotating shaft 101 of motor 100 is stretched out to transmission mechanism housing 20 side.
Transmission mechanism housing 20 is arranged on the side of main casing 10.This transmission mechanism housing 20 is mainly received and is filled with the 1st bevel gear 200, the 2nd bevel gear 201, main shaft 202, bearing 203,204 etc.1st bevel gear 200 is sleeved in rotating shaft 101.2nd bevel gear 201 engages with the 1st bevel gear 200.In addition, the 2nd bevel gear 201 is connected with main shaft 202, the 2nd bevel gear 201 and main shaft 201 common rotation.This main shaft 202 is kept by two bearings 203,204.Thus, be the rotation of the main shaft 202 perpendicular to turning cylinder 101 by the rotation output transform of motor 100.The inner flange 205 with this main shaft 202 associated movement is remain in the top ends of main shaft 202.In addition, be formed with screw thread in the top ends of main shaft 202, outward flange 206 is threaded connection and is arranged on this main shaft 202 and can unloads.Between inner flange 205 and outward flange 206, hold emery wheel 2, and this emery wheel 2 can unload.
Back casing 30 is arranged on the side contrary with transmission mechanism housing 20 of main casing 10.This back casing 30 is received and is filled with power supply wiring portion 300.This power supply wiring portion 300 is electrically connected with motor 100.In power supply wiring portion 300, be provided with power line 301 and switch 302, power line 301 is for from external power source transmission current, and switch 302 is for switching the Push And Release (ON, OFF) of the driving to grinder 1.
As shown in Figure 2, the parts of roughly semicircular in shape when runner protecting hood 40 is for overlooking.This runner protecting hood 40 is made up of guard section 41 and cylindrical portion 42.Cylindrical portion 42 is provided with to three outstanding protuberances 43 of radially inner side.In addition, as shown in Figure 3 and Figure 4, cylindrical portion 42 is equally spaced provided with 12 engaging recessed parts 44 in circumference.As shown in Figure 1, this runner protecting hood 40 is arranged on runner protecting hood installation portion 50 by cylindrical portion 42, and can unload.Thus, by half circumference of guard section 41 from outer side covers emery wheel 2.So, can be suppressed to add dispersing of the fragment of the work piece caused man-hour by emery wheel 2 pairs of work pieces by runner protecting hood 40, and prevent user from touching the emery wheel 2 of rotation, protection user can not be injured.
Referring to Fig. 3 ~ Figure 13, the installation portion installing this runner protecting hood 40 is described in detail.In addition, in Fig. 3 ~ Figure 13, for convenience, the parts outside runner protecting hood 40 and runner protecting hood installation portion 50 are eliminated.And, in Fig. 5 ~ Fig. 8, for convenience, runner protecting hood 40 is also dispensed.As shown in Fig. 3 ~ Fig. 8, runner protecting hood installation portion 50 is primarily of runner protecting hood engaging part 60 and formation such as runner protecting hood holding member 70 grade.
As shown in Figure 4, runner protecting hood engaging part 60 is made up of the ring part 62 of pedestal 61 and cylindrical shape outstanding from this pedestal 61.The spindle through-hole 63 passed for main shaft 202 is formed at the center of ring part 62.As shown in Fig. 4 ~ Fig. 6, be formed with the gathering sill 64 that three protuberances 43 of runner 40 are led in the periphery of ring part 62.In addition, as shown in Fig. 4, Fig. 7 and Fig. 8, be formed with the 1st slot 65 be communicated with gathering sill 64 at the complete cycle of the periphery of ring part 62.In addition, in the coupling part of pedestal 61 with ring part 62, on the complete cycle of ring part 62, the 2nd holding section 66 is formed with.In addition, as shown in Fig. 4 ~ Fig. 6, be formed with relief portion 67 in the periphery of ring part 62, this relief portion 67 enables engaging protuberance 74b move to the direction at the center near ring part 62.This relief portion 67 is connected with the 2nd holding section 66.Runner protecting hood engaging part 60 is fixed on transmission mechanism housing 20 by 4 bolts 68.This runner protecting hood engaging part 60 is the example structure corresponding to " collar " of the present invention.
As shown in Figure 4, runner protecting hood holding member 70 is formed primarily of slide unit 71, leaf spring 80 and push part 90.
As shown in Fig. 4 ~ Fig. 6, slide unit 71 is for having the parts of flat part 72, and this flat part 72 is roughly flat parts for what be configured in the roughly half cycle scope of the periphery of ring part 62.On flat part 72, the position corresponding in the head of two bolts 68 given prominence to from pedestal 61 is formed with two notch 73.In addition, as shown in Figure 6, be L1 along the above-below direction of Fig. 6 by the straight line at the center of ring part 62, slide unit 71 is engaging protuberance 74a, 74b from outstanding two of flat part 72 with the end position of this straight line intersection has.In addition, slide unit 71 also has movement limiting portion 75, and this movement limiting portion 75 and periphery of facing to ring part 62 outstanding from flat part 72 configures.As shown in Figure 4, flat part 72 is formed with the screw 76 screwed with two screws 97.
As shown in Figure 4, the metal parts of the tabular roughly in letter U shape when leaf spring 80 is for overlooking, it covers the roughly half cycle of the peripheral part of ring part 62.This leaf spring 80 has fixed part 81, and two ends of this fixed part 81 are passed for bolt 68 respectively, are fixed on pedestal 61 by leaf spring 80 by two bolts 68.In addition, as shown in Fig. 4, Fig. 8, leaf spring 80 has: two the 1st loading units 82 bent in thickness of slab direction, the holding section 83 projected upwards in thickness of slab side be further formed in the part of connection two the 1st loading units 82, connect the 2nd loading unit 84 of the 1st loading unit 82 and fixed part 81.This holding section 83 can engage with the engaging recessed part 44 of runner protecting hood 40.In addition, the 2nd loading unit 84 is bent upwards in thickness of slab side from the side.
As shown in Fig. 4 ~ Fig. 6, push part 90 is slided for push pressing portion 91 for user thus make the slide unit 71 that is connected with pressing portion 91 produce relative to pedestal 61.Pressing portion 91 roughly in word master L-shape configures along the straight line L2 shown in Fig. 6.This pressing portion 91 is configured in the tangent line region near the tangent line parallel with straight line L1 of ring part 62.In the end of pressing portion 91, helical spring 92 is installed.This helical spring 92 abuts with the spring abutment 93 be fixed on transmission mechanism shell 20.Specifically, spring abutment 93 is provided with guide rod 94, this guide rod 94 is through the inside of helical spring 92.Thus helical spring 92 can stretch along the 2nd straight line L2 in Fig. 6, and pressing portion 91 moves on the bearing of trend of straight line L2.Spring abutment 93 is fixed on transmission mechanism housing 20 by packing ring 96 by bolt 95.In addition, pressing portion 91 is provided with two screws 97, this screw 97 screws with the screw 76 of slide unit 71, thus makes slide unit 71 and pressing portion 91 movement jointly.Above-mentioned straight line L1 and L2 is respectively the example structure corresponding to " the 1st straight line " and " the 2nd straight line " in the present invention.
The runner protecting hood holding member 70 with as above structure is mounted as illustrated in fig. 5, and slide unit 71 can be slided relative to pedestal 61.Specifically, as shown in Figure 9, Figure 10, slide unit 71 is kept by the 2nd slot 66 of ring part 62, can relative to the right and left upward sliding of pedestal 61 at Figure 10.Now, as shown in Figure 8, the 2nd loading component 84 of leaf spring 80 is configured between slide unit 71 and pedestal 61, namely loads relative to the 2nd slot 66 top of slide unit 71 to Fig. 8.2nd loading unit 84 is the example structure of " the 2nd elastomeric element " corresponded in the present invention.
In addition, as shown in figure 11, helical spring 92 is remained on pressing portion 91 with the state of compression and is fixed between the spring abutment 93 on transmission mechanism housing 20 by push part 90.Thus, loaded to the top in Figure 11 along straight line L2 by helical spring 92 pairs of push part 90 and slide unit 71.Namely, helical spring 92 along straight line L1 mono-segment distance left by the center of ring part 62 and the straight line L2 being parallel to this straight line L1 configure, thus, push part 90 can tangent line region near the tangent line parallel with straight line L1 of ring part 62, move linearly on the bearing of trend of straight line L2.In addition, as shown in Figure 6, under the state of not installing runner protecting hood 40, the engaging protuberance 74a of side is connected on ring part 62, and restriction push part 90 and slide unit 71 move to the top in Fig. 6.
In addition, as shown in Figure 12 and Figure 13, make its active force overcoming helical spring 92 if push pressing portion 91 and move, then the engaging protuberance 74b of opposite side does rectilinear motion to the direction at the center near ring part 62 on straight line L1, abut with relief portion 67, thus the movement of below (in Figure 13 left) in Figure 12 of slide unit 71 is prevented from.Now, the engaging protuberance 74a of side outwards moves along straight line L1 from the central side of ring part 62.This runner protecting hood holding member 70 is the example structure of " holding member " corresponded in the present invention.In addition, pressing portion 91 is the example structure in " the snap-action portion " corresponded in the present invention, and helical spring 92 is the example structure of " loading component " corresponded in the present invention.
Below the structure that runner protecting hood 40 is maintained on runner protecting hood installation portion 50 is described in detail.Runner protecting hood 40 to be arranged on runner protecting hood installation portion 50 and can to unload.And runner protecting hood 40 has multiple turned position relative to runner protecting hood installation portion 50.Specifically, runner protecting hood 40 is fastened on ring part 62 by cylindrical portion 42 is chimeric, and, can rotate in the circumference of runner protecting hood installation portion 50.Thus, make guard section 41 there are multiple turned positions with predetermined angular relative to runner protecting hood installation portion 50 and transmission mechanism housing 20.In other words, that is, runner protecting hood 40 can be made to rotate relative to runner protecting hood installation portion 50 thus can be configured on multiple different turned position.Thus, one can be selected from multiple turned position, runner protecting hood 40 is configured thereon.Thus, on an arbitrary turned position that runner protecting hood 40 can be made to be arranged on relative to runner protecting hood installation portion 50 select from multiple turned position.
When installing runner protecting hood 40, as shown in Figure 12 and Figure 13, push part 90 being pushed, engaging protuberance 74a, 74b being produced mobile, in this case, the cylindrical portion 42 of runner protecting hood 40 being fastened on ring part 62.Now, three of runner protecting hood 40 protuberances 43 are made to aim at the position of the gathering sill 64 of ring part 62.Afterwards, make runner protecting hood 40 relative to ring part 62 axially moving at ring part 62, thus cylindrical portion 42 is configured between ring part 62 and movement limiting portion 75.Cylindrical portion 42 abuts to the flat part 72 of slide unit 71, and it moves and is prevented from, and protuberance 43 enters in the 1st slot 65 via gathering sill 64.Thus, protuberance 43 is maintained in the 1st slot 65 and can rotates in the circumference of ring part 62.Now, the 2nd loading unit 84 of leaf spring 80 is by flat part 72 axially loading cylindrical portion 42 at ring part 62.Cylindrical portion 42 structure be fastened on ring part 62 is so-called bayonet socket (bayonet) structure.This cylindrical portion 42 is the example structure of " installation portion " corresponded in the present invention.
Along with runner protecting hood 40 is relative to the rotation of ring part 62, the holding section 83 of leaf spring 80 engages with in 12 engaging recessed parts 44.That is, by making runner protecting hood 40 rotate relative to ring part 62, thus holding section 83 can be removed with the engaging of engaging recessed part 44 by the elastic deformation of the 1st loading unit 82 of leaf spring 80.In addition, holding section 83 can be made optionally to engage with each engaging recessed part 44.By making holding section 83 engage with any one engaging recessed part 44, thus can position runner protecting hood 40, determining its turned position.That is, by making runner protecting hood 40 rotate relative to ring part 62, thus runner protecting hood 40 can be made to be arranged on multiple turned position relative to ring part 62.1st loading unit 82 and holding section 83 are the example structure of " the 1st elastomeric element " corresponded in the present invention, and engaging recessed part 44 is the example structure of " engaged part " corresponded in the present invention.
Select from multiple turned position and determine a turned position, removing the pushing to push part 90, then, under the effect of the active force of helical spring 92, pressing portion 91 moves to the position shown in Figure 11 together with slide unit 71.Thus engaging protuberance 74a, 74b engage with the engaging recessed part 44 of cylindrical portion 42, runner protecting hood 40 are remained on the state that can not produce rotation relative to ring part 62.Now, the periphery of cylindrical portion 42 abuts with movement limiting portion 75, stops push part 90 and slide unit 71 to move to the top in Figure 11.In addition, when movement limiting portion 75 abuts with the periphery of cylindrical portion 42, the engaging protuberance 74a of above-mentioned side does not abut with ring part 62.The slide unit 71 with engaging protuberance 74a, 74b is the example structure of " holding section " corresponded in the present invention, and holding section 74a, 74b are the example structure in " the engaging inscape portion " corresponded in the present invention.
When changing the turned position of runner protecting hood 40, as shown in Figure 12 and Figure 13, push part 90 being pushed, engaging protuberance 74a, 74b are moved, the engaging of engagement release protuberance 74a, 74b and engaging recessed part 44.Now, engaging protuberance 74b moves to the direction at the center near ring part 62, and engaging protuberance 74a moves laterally from the central side of ring part 62.That is, engage the medial movement of protuberance 74b to cylindrical portion 42, engaging protuberance 74a moves to the outside of cylindrical portion 42, and engaging protuberance 74a, 74b are removed with the engaging of engaging recessed part 44.Afterwards, runner protecting hood 40 is made to rotate relative to ring part 62 until arrive the turned position of regulation.After making runner protecting hood 40 rotate, remove the pushing to push part 90, thus engaging protuberance 74a, 74b are engaged with engaging recessed part 44 again, runner protecting hood 40 is remained on the turned position of regulation.
Adopt present embodiment as above, make the push part 91 of slide unit 71 movement, region at straight line L1 mono-segment distance left by the center of ring part 62 and near the tangent line being parallel to the ring part 62 of this straight line L1, to move linearly along the straight line L2 being parallel to this tangent line.This, compared with the structure making push part 90 carry out along the straight line L1 by above-mentioned center moving linearly, can reduce the size of runner installation portion 50.Such as, when employing makes push part 90 carry out along the straight line L1 by above-mentioned center the structure moved linearly, the length dimension of runner installation portion 50 on the bearing of trend of straight line L1 is, length dimension (from pressing portion 91 to the length of the spring abutment 93) sum of the length dimension (diameter of ring part 62) of the maximum outside diameter of ring part 62 and the movable area of push part 90.And in the present embodiment, because push part 90 is straight line L1 mono-segment distance that leaves by the center of ring part 62 and the region be parallel near the tangent line of the ring part 62 of this straight line L1 moves linearly, thus, the length dimension of runner installation portion 50 on the bearing of trend of straight line L1 is only the length of the movable area of push part 90.Utilize the structure of such runner protecting hood installation portion 50 can reduce the size of grinder 1.
In addition, adopt present embodiment, what slide unit 71 and push part 90 were carried out is move linearly.This be not compared with the structure of carrying out moving linearly, the service life of slide unit 71 and push part 90 can be improved.That is, owing to moving linearly, thus slide unit 71 and push part 90 are slided as a whole, so each structure member forming slide unit 71 and push part 90 is from the viewpoint to be worn away etc., under being placed in same condition of work.Instead of carry out in the structure that moves linearly, owing to can produce rotation, torsion etc. on each structure member, thus, the amount of movement of each structure member is different.Thus, can concentrate at the specific local stress that produces, consider from the angle of durability etc., this can increase consumption degree and the degree of aging of specific structure member.In the present embodiment, because slide unit 71 and push part 90 move linearly, the service life of each parts of slide unit 71 and push part 90 can thus be extended.
In addition, adopt present embodiment, the cylindrical portion 42 of engaging protuberance 74a, 74b and runner protecting hood 40, be positioned at the outer end diametrically paralleled with the moving direction of push part 90 and engage.That is, engage protuberance 74a, 74b to engage with engaging recessed part 44 in the position at the both ends diametrically of the furthest apart of cylindrical portion 42, thus, can stably keep runner protecting hood 40.In addition, move on straight line L2 by making push part 90, thus engaging protuberance 74a, 74b can be made to move on straight line L1, engaging protuberance 74a, 74b thus can be made to engage with engaging recessed part 44 in the position at the both ends diametrically of the furthest apart of cylindrical portion 42.
In addition, adopt present embodiment, medial movement from the engaging protuberance 74b of side to ring part 62 thus enter in relief portion 67.This with make two engage protuberance 74a, 74b to the outside movement of ring part 62 structure compared with, the appearance and size of grinder 1 can be reduced.In addition, owing to being that engaging protuberance 74a moves to the outside of ring part 62, engages protuberance 74b to the such structure of the medial movement of ring part 62, thus, the structure of slide unit 71 can not be caused more complicated, only need that slide unit 71 is slided to a direction and engaging protuberance 74a, 74b can be made to move.
In addition, adopt present embodiment, corresponding to the rotation of runner protecting hood 40, the holding section 83 of leaf spring 80 engages or engagement release with engaging recessed part 44.Thus, when holding section 83 engages with engaging recessed part 44, utilize the elastic force of leaf spring 80, make the rotation of runner protecting hood 40 produce " click clatter " sound, enable user experience turned position, thus reliably runner protecting hood 40 can be positioned at the turned position of regulation.
In addition, adopt present embodiment, 2nd loading unit 84 of leaf spring 80 is by cylindrical portion 42 axially the loading at ring part 62 of flat part 72 pairs of runner protecting hoods 40 of slide unit 71, further, the holding section 83 of leaf spring 80 is also to cylindrical portion 42 axially the loading at ring part 62 of runner protecting hood 40.Thus, the rotation posture (state) when runner protecting hood 40 can be made to rotate is more stable.In addition, owing to being form the 1st loading unit 82 and the 2nd loading unit 84 by a leaf spring 80, thus can the increasing of suppression component quantity.
In addition, adopt present embodiment, the periphery of cylindrical portion 42 is connected on movement limiting portion 75, is maintained on ring part 62 with such state.Thus, the unstability of the maintenance of the runner protecting hood 40 that the vibration produced when grinder 1 can be suppressed to drive causes.
In addition, adopt present embodiment, owing to forming the 2nd slot 66 on ring part 62, the 2nd slot 66 engages slide unit 71.Thus, slide unit 71 need not be made to produce movement in the axial direction can make slide unit 71 slide relative to pedestal 61.In addition, owing to forming notch 73 in the position corresponding to bolt 68, thus, can prevent slide unit 71 from coming off from ring part 62 by the head of bolt 82.
The following describes variation present embodiment being implemented to numerous variations.Wherein, the structure identical with present embodiment uses identical symbol to mark, and suitably eliminates its description.
As shown in figure 14, in the 1st variation, L3 and L4 is two straight lines being parallel to the straight line L2 extended on the moving direction of push part 90, and the two is by the central area of cylindrical portion 42.Engaging protuberance 74a and 74b fastens with the outer end crossing with straight line L3, L4 of cylindrical portion 42 respectively.That is, the engaging protuberance 74a of side engages with the outer end crossing with straight line L3 of cylindrical portion 42, and the engaging protuberance 74b of opposite side engages with the outer end crossing with straight line L4 of cylindrical portion 42.This engaging protuberance 74a, 74b configure relative to the Central Symmetry of cylindrical portion 42.In the 1st variation, due to engaging protuberance 74a, 74b also with in cylindrical portion 42, furthest apart, be positioned at diametrically end positions on engaging recessed part 44 engage, thus can stably keep runner protecting hood 40.
In addition, as shown in figure 15, in the 2nd variation, be provided with three engaging protuberances 74a, 74b, 74c.The outer end engaging protuberance 74a crossing with the straight line L1 at the center by this cylindrical portion 42 of cylindrical portion 42 engages.Engaging protuberance 74b, 74c engage respectively at the outer end crossing with straight line L3, the L4 of the central area by this cylindrical portion 42 of cylindrical portion 42.Three that engage with engaging recessed part 44 engage protuberance 74a, 74b, 74c and arrange relative to the Central Symmetry of cylindrical portion 42.In the 2nd variation, because three engaging protuberances 74a, 74b, 74c are arranged relative to the Central Symmetry of cylindrical portion 42, thus can stably keep runner protecting hood 40.
Above, runner protecting hood 40 to be arranged on runner protecting hood installation portion 50 and can to unload, but the present invention is not limited to this.As long as that is, runner protecting hood 40 can rotate, the structure that can remain on relative to runner protecting hood installation portion 50 on multiple turned position, runner protecting hood 40 also can be made can not to unload from runner protecting hood installation portion 50.
In addition, above, engaging protuberance configures relative to the Central Symmetry of cylindrical portion 42, but the present invention is not limited to this, and engaging protuberance also can be made asymmetric relative to the center of cylindrical portion 42.In addition, be illustrated for the situation being provided with plural engaging protuberance above, but, also only can be provided with an engaging protuberance.When being only provided with an engaging protuberance, this engaging protuberance is preferably made to the medial movement of cylindrical portion 42, engaging protuberance to be removed with the engaging of engaging recessed part.
Claims (14)
1. a grinder, it has:
There is the main part of the collar;
The runner protecting hood on the described collar can be arranged on;
Described runner protecting hood is fixedly remained on the holding member on the described collar,
It is characterized in that,
Described runner protecting hood has the installation portion of the annular be arranged on the described collar,
Described holding member has the holding section engaged with described installation portion and the snap-action portion making the movement of described holding section,
Holding section can be made to move for described snap-action portion and the engaging of the fastening state fastened in described installation portion and described holding section and described installation portion and described holding section is switched by between the engaging disarm state removed,
And, described snap-action portion leave the 1st straight line and with the 2nd straight line of the 1st straight line parallel on move linearly, described holding section is moved up in the side being parallel to described 1st straight line and switches described fastening state with described to engage disarm state, described 1st straight line refers to the straight line of the center line vertically through described installation portion.
2. grinder according to claim 1, is characterized in that,
Described holding section engages with a pair outer end be positioned on described 1st straight line of described installation portion.
3. grinder according to claim 1, is characterized in that,
Medial movement from described holding section to described installation portion and remove the engaging with described installation portion.
4. grinder according to claim 1, is characterized in that,
Described holding section is made up of the multiple engaging inscape portions engaged with described installation portion.
5. grinder according to claim 1, is characterized in that,
Described holding section is made up of the multiple engaging inscape portions engaged with described installation portion,
Engage inscape portion described at least one and remove the engaging with described installation portion to described installation portion medial movement,
Engage inscape portion described in remaining move to the outside of described installation portion and remove the engaging with described installation portion.
6. the grinder according to any one of Claims 1 to 5, is characterized in that,
Described snap-action portion is configured in and the tangent line region corresponding to the tangent line of the described installation portion of described 1st straight line parallel, and this snap-action portion is parallel to this tangent line and moves linearly.
7. the grinder according to claim 4 or 5, is characterized in that,
Described multiple engaging inscape portion is relative to the Central Symmetry of described installation portion.
8. the grinder according to claim 4 or 5, is characterized in that,
Described runner protecting hood optionally can be configured on multiple different turned position by the rotation relative to the described collar, and described runner protecting hood can be arranged on the described collar and to be arranged in one that selects from described multiple turned position,
Described installation portion has the multiple engaged parts engaged with described holding section,
Described multiple engaged part to be formed in the circumference of the annular section of described installation portion at equal intervals,
Described multiple engaging inscape portion corresponds to selected described turned position and engages with in described multiple engaged part.
9. the grinder according to any one of Claims 1 to 5, is characterized in that,
Described holding member has the loading component loaded described snap-action portion,
Described snap-action portion is undertaken moving by the active force overcoming described loading component and removes the engaging of described installation portion and described holding section.
10. the grinder according to any one of Claims 1 to 5, is characterized in that,
Described holding member has and engages with described installation portion and limit the inclination movement limiting unit of the inclination movement of described runner protecting hood.
11. grinders according to any one of Claims 1 to 5, is characterized in that,
Described installation portion has the multiple engaged parts engaged with described holding section,
Also there is the 1st elastomeric element engaged with described engaged part,
Described 1st elastomeric element loads described installation portion on the direction of the centerline axis parallel with described installation portion,
Described installation portion can rotate in the circumferential relative to the described collar, by the active force of described 1st elastomeric element, described installation portion is connected on the described collar.
12. grinders according to claim 11, is characterized in that,
Also have by the 2nd elastomeric element that described holding member loads described installation portion on the direction of the centerline axis parallel with described installation portion,
By the active force of described 2nd elastomeric element, described installation portion is connected on the described collar.
13. grinders according to claim 12, is characterized in that,
Described 1st elastomeric element and described 2nd elastomeric element are integrally formed.
14. grinders according to any one of Claims 1 to 5, is characterized in that,
The described collar is provided with recess in the axial direction,
Described holding member engages with described recess makes this holding member be prevented from described movement axially, but allows this holding member to move in the radial direction of the described collar.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-273302 | 2011-12-14 | ||
| JP2011273302 | 2011-12-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103158071A CN103158071A (en) | 2013-06-19 |
| CN103158071B true CN103158071B (en) | 2016-03-09 |
Family
ID=48581881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210395434.7A Active CN103158071B (en) | 2011-12-14 | 2012-10-17 | Grinder |
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| Country | Link |
|---|---|
| CN (1) | CN103158071B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6982991B2 (en) | 2017-06-20 | 2021-12-17 | 株式会社マキタ | Grinder |
| TWI723507B (en) | 2019-08-22 | 2021-04-01 | 車王電子股份有限公司 | Protective device for electric tools |
| CN112440210B (en) * | 2019-08-28 | 2022-04-08 | 车王电子股份有限公司 | Protective device of electric tool |
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| DE102009024427A1 (en) * | 2009-06-09 | 2010-12-16 | Metabowerke Gmbh | Protective casing for accommodating drive shaft of angle grinder, has adjusting ring rotatable in peripheral direction opposite to collar, so that ring is adjusted between engaging position and non-engaging position |
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| DE102009028404A1 (en) * | 2009-08-10 | 2011-02-17 | Robert Bosch Gmbh | Machine tool with a protective hood |
| CN202021517U (en) * | 2011-03-07 | 2011-11-02 | 浙江皇冠电动工具制造有限公司 | Drop prevention structure for screw component of protective cover of angle grinder |
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|---|---|---|---|---|
| EP1618990A1 (en) * | 2004-07-16 | 2006-01-25 | Narex Ceska Lipa a.s. | Power tool, especially angle grinder |
| DE102007052685A1 (en) * | 2007-11-05 | 2009-05-07 | Robert Bosch Gmbh | Hand tool |
| CN101977734A (en) * | 2008-03-18 | 2011-02-16 | 罗伯特·博世有限公司 | Hand-held machine tool, in particular hand-guided grinding machine |
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| CN101623850A (en) * | 2008-07-11 | 2010-01-13 | 罗伯特·博世有限公司 | Protective guard rotation-locking device |
| DE102009024427A1 (en) * | 2009-06-09 | 2010-12-16 | Metabowerke Gmbh | Protective casing for accommodating drive shaft of angle grinder, has adjusting ring rotatable in peripheral direction opposite to collar, so that ring is adjusted between engaging position and non-engaging position |
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| CN202021517U (en) * | 2011-03-07 | 2011-11-02 | 浙江皇冠电动工具制造有限公司 | Drop prevention structure for screw component of protective cover of angle grinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103158071A (en) | 2013-06-19 |
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