CN102029430B - Portable cutting machine - Google Patents
Portable cutting machine Download PDFInfo
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- CN102029430B CN102029430B CN 200910204938 CN200910204938A CN102029430B CN 102029430 B CN102029430 B CN 102029430B CN 200910204938 CN200910204938 CN 200910204938 CN 200910204938 A CN200910204938 A CN 200910204938A CN 102029430 B CN102029430 B CN 102029430B
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- arcuate flanks
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Abstract
The invention provides a portable cutting machine which comprises a saw bit, a case and a protective cover movably installed on the shell, wherein a saw bit through hole is arranged in the protective cover and is used for facilitating the pass of the saw bit, and the protective cover moves between a first position and a second position movably relative to the case. When the protective cover is located in the first position, the saw bit does not pass through the saw bit through hole; when the protective cover is located in the second position, the saw bit passes through the saw bit through hole. One of the protective cover and the case is provided with an arc guide rail, and the other one of the protective cover and the case is provided with a limiting part. The arc guide rail comprises a first arc side face and a second arc side face, and the first arc side face and the second arc side face are concentrically arranged. The limiting part comprises a first limiting part and a second limiting part, the first limiting part is selectively in linear contact with one of the first limiting part and the second limiting part, and the second limiting part is selectively in linear contact with one of the first limiting part and the second limiting part.
Description
Technical field
The present invention relates to a kind of power tool, especially relate to a kind of portable cutter.
Background technology
traditional portable cutter, for example the portable electric annular saw generally includes a saw blade that is used for processing work, be used for driving the motor of this saw blade, the output shaft of motor is usually all perpendicular to saw blade, main handle is used for holding for the operator in operating process, main handle is vertical with motor to be arranged, this electric circular saw comprises a base plate, decide guard shield and a moving guard shield for one, decide guard shield and be positioned at the top of base plate, at any time saw blade top is closed at wherein, moving guard shield is positioned at below base plate, during work, moving guard shield is rotatable exposes the saw blade bottom, the shortcoming of this traditional electrical annular saw be volume ratio more greatly and more clumsy, process some smaller, just not too applicable during thinner workpiece.
European patent EP has disclosed a kind of small volume for No. 1177868B1, light and handy portable electric annular saw, this electric circular saw comprises a less saw blade, be used for driving the motor of saw blade, casing, the casing front portion is used for accommodating transmission mechanism etc., the casing rear portion is used for accommodating motor etc., this little portable electric annular saw does not arrange independent handle, the rear portion of casing namely can be used as handle and uses, this electric circular saw does not have the independent guard shield of deciding, the casing front portion is contained in saw blade top wherein, this casing front portion just is equivalent to the guard shield of deciding of traditional electrical annular saw, independent moving guard shield movably is installed on the casing front portion, should moving guard shield comprise guard shield bottom and four from the bottom upwardly extending sidewall, the guard shield bottom is provided with opening and is used for making saw blade therefrom stretch out, moving shroud ring is around the anterior setting of housing, thereby and different with respect to the anterior removable saw blade depth of exposing that makes of casing.This electric circular saw structure is relatively simple, relatively is fit to the thinner workpiece of cutting.
but the anterior outer wall of the casing of the electric circular saw that discloses for No. EP1177868B1 is provided with the linear pattern chute, moving guard shield inwall is provided with slide block, slide block coordinates with chute and makes moving guard shield to slide with respect to casing, because chute is linear pattern, so moving guard shield is also rectilinear motion with respect to the motion of casing front portion, the connected mode of this linear pattern chute and slide block makes in use procedure, operator's hand must be anterior near housing, and make as much as possible the point of application be arranged in chute directly over so that slide block is more smooth and easy in the motion of chute, but can make like this gripping very uncomfortable.
In addition, be to coordinate by chute and slide block between the electric circular saw guard shield that discloses for No. EP1177868B1 and casing, relative motion between the two is for sliding, and frictional force between the two is force of sliding friction, this force of sliding friction is relatively large, makes that the operator relatively requires great effort in operating process.
The applicant is that 200920037895.0 patent application has disclosed a kind of portable circular saw in the application number of on February 6th, 2009 application.This portable circular saw comprises: motor; Saw blade; Be used for the transmission mechanism of transferring power between motor and saw blade; Housing, this housing comprise the anterior and housing of housing rear portion; The housing front portion is used for accommodating described transmission mechanism and at least part of saw blade, and the housing rear portion is used for accommodating described motor; Be installed on the guard shield of housing front portion, this guard shield comprises bottom guard shield, the guard shield bottom is provided with opening and therefrom exposes with processing work for saw blade, described guard shield with respect to housing movably from the primary importance to the second place, when guard shield is positioned at primary importance, saw blade is not exposed to opening, and when guard shield was positioned at the second place, saw blade is at least part of was exposed to opening; Guard shield is provided with arc groove, and housing is equipped with spherical on the front portion, and this spherical can roll along described arc groove and make described guard shield move between primary importance and the second place.This kind portable circular saw, be arcuate movement because this special connected mode of guard shield and housing front portion makes guard shield and the relative motion between the two of housing front portion, thereby the position that the operator holds in operating process does not need too close housing anterior, like this can be more laborsaving, and operate comfortable.Usually, spherical and arc groove are respectively equipped with two groups on a side of housing front portion and guard shield, and in use, the application of force direction of operator's hand will guarantee as much as possible.Otherwise, if move around concentric not when these two groups of sphericals move along separately arc grooves, can make spherical be easy in arc groove stuck.Yet; in actual use procedure; different operator often holding mode is different; application of force direction also can be different; same operator at last just, different time points, application of force direction also has difference; thereby this portable circular saw in use usually stuck phenomenon can occur, makes cutting work have some setbacks very much.
Summary of the invention
Technical problem to be solved by this invention is to provide the reliable portable cutter of a kind of operation.
In order to address the above problem, the invention provides a kind of portable cutter, comprise: saw blade, housing movably is installed on the guard shield on described housing, this guard shield is provided with the saw blade through hole and is used for making saw blade therefrom pass, this guard shield movably moves between primary importance and the second place with respect to described housing, and when guard shield was positioned at primary importance, described saw blade did not pass from the saw blade through hole, when guard shield was positioned at the second place, described saw blade passed from described saw blade through hole; One in described guard shield and described housing is provided with arc-shaped guide rail, another in both is provided with locating part, described arc-shaped guide rail comprises the first arcuate flanks and the second arcuate flanks, this first arcuate flanks and the second arcuate flanks arrange with one heart, described locating part comprises first group of locating part and second group of locating part, a linear contact in described first group of locating part and described the first arcuate flanks or the second arcuate flanks, described second group of locating part contacts with a linearity in described the first arcuate flanks or the second arcuate flanks.
In disclosed portable cutter, be provided with arc-shaped guide rail due to one in guard shield and housing, another in both is provided with locating part, this connected mode makes the relative housing of guard shield always move along concentric tracks, thereby prevent from occurring in operating process stuck phenomenon, the assurance operating process is carried out smoothly.
Preferred implementation of the present invention is also following several:
Preferably, arc-shaped guide rail of the present invention is located on guard shield, and locating part is located on housing.
Preferably, arc-shaped guide rail of the present invention is arc groove.
Preferably, arc groove of the present invention comprises groove floor, and portable cutter comprises that further the mating part coordinates with groove floor.
Preferably, mating part of the present invention contacts with groove floor is linear.
Preferably, arc groove of the present invention comprises two recess sidewall, and the first arcuate flanks and the second arcuate flanks lay respectively on two recess sidewall.
Preferably, first group of locating part of the present invention and second group of locating part are respectively bearing.
Preferably, arc-shaped guide rail of the present invention is arc groove, the first arcuate flanks and the second arcuate flanks are the medial surface of two correspondences of arc groove, first group of locating part and second group of locating part are respectively bearing, each bearing is contained in arc groove, and exercisable and the first arcuate flanks or the second arcuate flanks is linear contacts.
Preferably, arc-shaped guide rail of the present invention is arc opening, the first arcuate flanks and the second arcuate flanks are formed at two corresponding outsides of arc opening, first group of locating part and second group of locating part are respectively two bearings, be positioned at the both sides of arc opening as two bearings of first group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks are linear to be contacted, be positioned at the both sides of arc opening as two bearings of second group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks is linear contacts.
Preferably, arc-shaped guide rail of the present invention is arc convex, the first arcuate flanks and the second arcuate flanks are formed at the lateral surface of two correspondences of arc convex, first group of locating part and second group of locating part are respectively two bearings, be positioned at the both sides of arc convex as two bearings of first group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks are linear to be contacted, be positioned at the both sides of arc convex as two bearings of second group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks is linear contacts.
Description of drawings
Below in conjunction with accompanying drawing, the present invention is done further detailed description.
Fig. 1 is the stereogram of the portable cutter that discloses of first embodiment of the invention.
Fig. 2 is portable cutter that Fig. 1 the discloses plane when guard shield is not installed.
Fig. 3 is portable cutter that Fig. 1 the discloses cut-away view when guard shield is not installed.
Fig. 4 is the stereogram of the guard shield of the portable cutter that discloses of Fig. 1.
Fig. 5 is the guard shield stereogram from another perspective in Fig. 4.
Fig. 6 is the stereogram of portable cutter when saw blade exposes guard shield that Fig. 1 discloses.
Fig. 7 is the three-dimensional exploded view of the portable cutter that discloses of Fig. 1.
Fig. 8 is the stereogram that portable cutter that Fig. 1 discloses is seen from opposite side when guard shield is not installed.
Fig. 9 is that the portable cutter that discloses of Fig. 8 is at the partial enlarged drawing at A place.
The stereogram that Figure 10 is the portable cutter that discloses of Fig. 1 when the position that spanner is in out.
Figure 11 is the stereogram of the depth adjustment of the portable cutter that discloses of Figure 10.
Figure 12 is portable cutter that Fig. 1 the discloses cut-away view when guard shield and gear-box being installed being opened.
Figure 13 is the exploded view of portable cutter when base plate is not installed on guard shield that Fig. 1 discloses.
Figure 14 is the partial exploded view of the portable cutter that discloses of Fig. 1.
Figure 15 is the schematic internal view of portable cutter when guard shield is installed that Fig. 1 discloses.
Figure 16 is the part schematic diagram of the portable cutter that discloses of second embodiment of the invention.
Figure 17 is the part schematic diagram of the portable cutter that discloses of third embodiment of the invention.
In figure:
40. portable cutter 68. base plate 92. arc openings
42. housing 70a-d. guard shield sidewall 94. arcs are accommodated plate
44. anterior 72. saw blade through hole 96. slide blocks of housing
46. housing rear portion 74. chip-removal hole 98. cam spanners
48. handle grip section 76. cavity 100. cam part
50. first end 78. top edge 102. spanner sections
52. the second end 80a-d. arc groove 104. pointers
54. power line 82a-d. housing sidewall 106. rebounding mechanisms
56. saw blade 84. cylinder 108. helical springs
58. motor 86. pin 110. pins
60. switch 88. groove 112. pilot holes
62. transmission mechanism 88a. square groove 114. diameters are than small end
64. the guard shield 88b. cylindrical recesses 116. larger ends of diameter
66. guard shield bottom 90. depth adjustment 118. indicator collets
120. the first arcuate flanks 130. bearing outer ring 140. bearings
122. the second arcuate flanks 132. groove floor 142. arc convex
124. bearing 134. arc opening 144. first arcuate flanks
126. projection 136. first arcuate flanks 146. second arcuate flanks
128. bearing inner race 138. second arcuate flanks 148. bearings
X, Y. longitudinal extending axis a. angle
The specific embodiment
Embodiment one
With reference to Fig. 1, a kind of portable cutter 40 comprises housing 42, and this housing 42 comprises housing front portion 44, housing rear portion 46 and the housing middle part that is connected housing anterior 44 and housing rear portion 46.Housing middle part is handle grip section 48 in an embodiment of the invention.Housing 42 can be moulding, and can be made of two and half shells.Housing rear portion 46 comprises first end 50 and the second end 52, first end 50 and handle grip section 48 adjacency, and the second end 52 is away from handle grip section 48 and usually be connected with power line 54.
With reference to Fig. 2, handle grip section 48 roughly extends straight together with housing rear portion 46, handle grip section 48 is X with the longitudinal extending axis at housing rear portion 46, extend from 48 bendings of handle grip section housing front portion 44, the longitudinal extending axis of housing front portion 44 is Y, the angle a of the longitudinal extending axis X at the longitudinal extending axis Y of housing front portion 44 and handle grip section 48 and housing rear portion 46 is more than or equal to 90 degree, and angle a is greater than 90 degree in the present embodiment.
With reference to Fig. 3, portable cutter 40 comprises the saw blade 56 of processing work and is used for driving the motor of this saw blade 56, and motor is motor 58 in the present embodiment.In other embodiments of the present invention, motor can be also air motor, hydraulic motor etc.Being contained in housing front portion 44 of saw blade 56 parts.Motor 58 is contained in housing rear portion 46, thereby motor 58 is electrically connected with power line 54 and can be connected on AC power (not shown), and motor 58 can be also to power by dc-battery certainly.Portable cutter 40 also comprises switch 60, and switch 60 is electrically connected with motor 58 and is used for controlling the unlatching of motor 58 and stopping.
Being provided with transmission mechanism 62 between motor 58 and saw blade 56 is used for thereby transmission of power to the saw blade 56 of motor 58 is driven saw blade 56 motions.Transmission mechanism 62 is contained in respectively in housing anterior 44 and handle grip section 48.
With reference to Fig. 1, Fig. 4 and Fig. 5, portable cutter 40 comprises guard shield 64, guard shield 64 around surround housing front portion 44, guard shield 64 comprises guard shield bottom 66, in the present embodiment, the outside of guard shield bottom 66 also is equipped with base plate 68 (with reference to Figure 13), base plate 68 bottom guard shield between 66 the mode by buckle be fixedly connected with.In the course of work, base plate 68 contacts with surface of the work.In other embodiments of the present invention, the outside of guard shield bottom 66 is mounting base 68 not also, but directly contacts with surface of the work by guard shield bottom 66.
With reference to Fig. 1 and Fig. 6, be connected with the mating part (about arc track and mating part by arc-shaped guide rail between guard shield 64 and housing front portion 44, the back can be described in detail), coordinate with arc-shaped guide rail by the mating part, thereby the restriction guard shield is along the displacement on the direction vertical with the saw blade plane.Arc-shaped guide rail is located on anterior in both one of guard shield and housing, and the mating part is located on guard shield and anterior another in both of housing.The mating part coordinates with arc-shaped guide rail and can move along arc-shaped guide rail.When move along arc-shaped guide rail the mating part, guard shield 64 relative housing front portions 44 are movably from the primary importance to the second place, when guard shield 64 is positioned at primary importance, saw blade 56 does not expose (with reference to Fig. 1) from saw blade through hole 72, when guard shield 64 is positioned at the second place, saw blade 56 is at least part of exposes (with reference to Fig. 6) from saw blade through hole 72, at this moment, portable cutter 40 can be used to processing work.
With further reference to Fig. 4 and Fig. 5, guard shield sidewall 70a and 70b be over against setting, and guard shield sidewall 70c and 70d be over against setting, and when guard shield 64 is installed on housing front portion 44, guard shield sidewall 70a and 70b and saw blade 56 almost parallels, and be positioned at the both sides of saw blade 56.In the present embodiment, arc-shaped guide rail is the arc groove 80a that is located on the inner surface of guard shield sidewall 70a, 80b and be located at arc groove 80c on the inner surface of guard shield sidewall 70b, 80d.Arc groove 80a-d is from guard shield bottom 66 roughly extensions obliquely.Arc groove 80a-d is along the circumferential direction interval setting of guard shield sidewall 70a and 70b inner surface.The center of circle corresponding with the circular arc at arc groove 80b place, the center of circle corresponding to the circular arc at arc groove 80a place is roughly the same center of circle.The center of circle corresponding with the circular arc at arc groove 80d place, the center of circle corresponding to the circular arc at arc groove 80c place is roughly the same center of circle.
With reference to Fig. 7, Fig. 8 and Fig. 9, housing front portion 44 comprises four housing sidewall 82a-d, respectively with the corresponding cooperation of four guard shield sidewall 70a-d of guard shield 64, in the present embodiment, the mating part is located on the outer surface of housing sidewall 82a and 82b and is coordinated with arc groove 80a-d.The mating part is generally projection, and projection is contained in arc groove 80a-d and can moves within it.
In the present embodiment, the mating part comprises cylinder 84, the center of cylinder 84 is provided with through hole, pin 86 passes through hole, the two ends of pin 86 are exposed to through hole, coordinating between the through hole of pin 86 and cylinder 84 is matched in clearance, thereby make cylinder 84 to rotate around pin 86, sidewall 82a and 82b are provided with to accommodate the groove 88 of mating part, the mid portion of groove 88 is square groove 88a, what be used for part accommodates cylinder 84, and the two ends of groove 88 are provided with the cylindrical recesses 88b that the two ends shape with the pin 86 that exposes through hole is complementary.Being contained in square groove 88a of cylinder 84 parts, the two ends of pin 86 are contained in cylindrical recesses 88b, between cylinder 84 and square groove 88a, certain gap are arranged, and this docked mode makes cylinder 84 to rotate in square groove 88a.In the present embodiment, be interference fit between the two ends of pin 86 and cylindrical recesses 88b, fall down thereby make whole mating part can not be easy to from the housing front portion 44.
Certainly can be to be fixedly connected with between pin 86 and cylinder 84, and can be also matched in clearance between the two ends of pin 86 and cylindrical recesses 88b, make pin 86 and cylinder 84 rotate together.
With reference to Figure 10 and Figure 11, portable cutter 40 comprises that depth adjustment 90 is used for regulating depth of cut.Housing sidewall 82a is provided with arc opening 92.Bearing of trend and the radian of the bearing of trend of arc opening 92 and radian and arc groove 80a-d are roughly the same.One arc is accommodated plate 94 and is contained in this arc opening 92.Depth adjustment 90 movably is contained in arc and accommodates in plate 94.Depth adjustment 90 comprises slide block 96, and slide block 96 movably is installed on arc and accommodates in plate 94.
Being connected on slide block 96 of cam spanner 98 pivotables.Cam spanner 98 comprises cam part 100 and spanner section 102.By operation spanner section 102, cam part 100 is pivotable with the relative housing sidewall 82a clamping of depth adjustment 90 or unclamp.Fixingly on slide block 96 be connected with a pointer 104, pointer 104 is used to refer to the degree of depth of setting.Arc opening 92 1 sides indicate scale value (not shown), and this scale value represents saw blade depth.Pointer 104 points on the scale value of arc opening 92 1 sides, thereby shows the saw blade depth that current setting is good.
In work, when needing regulation depth, first lift spanner section 102, the position that cam spanner 98 is in out along arc opening 92 sliding sliders 96, makes pointer 104 point to the scale value that needs.After having set up the degree of depth, depress spanner section 102, make cam spanner 98 be in the position of closing, this moment, slide block 96 was locked in a certain position of arc opening 92.During cut workpiece, being pressed on surface of the work of base plate 68 parts, the operator holds handle grip section 48, and impose on 48 1 pressure of handle grip section, the relative guard shield 64 of housing 42 this moment is along arcuate movement, until the top edge 78 of guard shield 64 contacts with the cam part 100 of cam spanner 98, expose the saw blade 56 of the certain depth of guard shield 64 and just can process.
With reference to Figure 12, portable cutter 40 comprises rebounding mechanism 106, and this rebounding mechanism 106 is used for making the relative housing 42 of guard shield 64 move to primary importance from the second place.In the present embodiment, rebounding mechanism 106 comprises helical spring 108 and pin 110.portable cutter 40 further comprises gear drive (not indicating), this gear drive is contained in gear box casing (not indicating), gear box casing is provided with pilot hole 112 and is used for accommodating helical spring 108 and part pin 110, one end of helical spring 108 props up gear box casing, pin 110 comprises that a diameter is than small end 114 and the larger end 116 of diameter, diameter is than being arranged with helical spring 108 on small end 114, the larger end 116 of diameter is against guard shield bottom 66,66 direction compresses power to 110 1, pin to helical spring 108 towards guard shield bottom.
With reference to Figure 13, be provided with between guard shield 64 and base plate 68 and cut wide indicating device.This is cut wide indicating device and comprises some indicator collets 118.Indicator collet 118 movably is installed on guard shield sidewall 70a-b, be used for after saw blade 56 is exposed to guard shield 64, the indication saw blade 56 foremost and rearmost end.
With reference to Figure 14 and Figure 15, further combined with Fig. 4 and Fig. 5, portable cutter 40 further comprises locating part.Above-mentioned arc-shaped guide rail is arranged on both one of guard shield 64 and housing 42, and locating part is arranged on both another of guard shield 64 and housing 42, and this locating part coordinates with arc-shaped guide rail, thereby restriction guard shield 64 is along the displacement of arc-shaped guide rail normal direction.
In an embodiment of the invention, the arc-shaped guide rail that coordinates with locating part refers to above-mentioned arc groove 80a and 80d, the locating part of mainly first introducing arc groove 80a and being mated here.
Locating part comprises first group of locating part and second group of locating part.A linear contact in first group of locating part selectable and the first arcuate flanks or the second arcuate flanks, a linearity in second group of locating part selectable and the first arcuate flanks or the second arcuate flanks contacts.
First group of locating part be identical with second group of locating part is a bearing 124.The upper outward extending projection 126 that is equipped with of housing sidewall 82a.Bearing 124 is installed on projection 126.Bearing 124 comprises bearing inner race 128 and bearing outer ring 130.The relative bearing inner race 128 of bearing outer ring 130 is rotatable.Be interference fit between bearing inner race 128 and projection 126.Two bearings 124 and two cylinders 84 all are contained in arc groove 80a.Two cylinders 84 are between two bearings 124, and the seat of cylinder 84 also is not limited between two bearings 124 certainly, also can be positioned at the outside of two bearings 124.
During operation, the operator presses handle grip section 48, make guard shield 64 move to the second place with respect to housing 42 from primary importance, as the bearing 124 of first group of locating part exercisable with the first arcuate flanks 120 or the second arcuate flanks 122 linear a contact in both, the gap certain with another maintenance in both; Simultaneously, as the exercisable linear contact that does not contact with the bearing 124 of first group of locating part in both with the first arcuate flanks 120 or the second arcuate flanks 122 of the bearing 124 of second group of locating part, and with both in another keep certain gap.
With reference to Figure 15, be certain flashy state diagram of relative housing 42 motions of guard shield 64, this moment, the bearing 124 as first group of locating part contacted with the first arcuate flanks 120 linearities, the gap certain with the second arcuate flanks 122 maintenances; Simultaneously keep certain gap as the bearing 124 of second group of locating part and the first arcuate flanks 120, contact with the second arcuate flanks 122 linearities.
After guard shield moves to the second place with respect to housing, the operator holds handle grip section 48, mobile portable cutting machine forward or backward, as first group of locating part with as linear a contact in exercisable while of the bearing of second group of locating part and the first arcuate flanks or the second arcuate flanks.
As hereinbefore, also contain in arc groove 80d and first group of locating part and second group of locating part that locating part is identical, the purpose that locating part is set in arc groove 80d is to make limit effect better.
Certainly the quantity of locating part is not limited to the above.
Embodiment two
With reference to Figure 16, present embodiment and embodiment one are basic identical, difference is that the arc-shaped guide rail that coordinates with locating part is not original arc groove, but is different from the another one arc opening 134 of arc groove, and the radian of this arc opening 134 is identical with the radian of aforementioned arc groove.Two respective side at arc opening 134 are provided with the first arcuate flanks 136 and the second arcuate flanks 138, first group of locating part and second group of locating part are respectively two bearings 140, be positioned at the both sides of arc opening 134 as two bearings 140 of first group of locating part, and exercisable and the first arcuate flanks 136 or second arcuate flanks 138 is linear contacts.
Figure 16 is certain flashy state diagram of relative housing 42 motions of guard shield 64, at this moment, a bearing 140 as first group of locating part contacts with the first arcuate flanks 136 linearities, as another bearing 140 and the second arcuate flanks 138 maintenance certain intervals of first group of locating part; Simultaneously, keep certain intervals as bearing 140 and first arcuate flanks 136 of second group of locating part, contact with the second arcuate flanks 138 linearities as another bearing 140 of second group of locating part.
Embodiment three
With reference to Figure 17, present embodiment and embodiment one basic identical (not shown), difference is that the arc-shaped guide rail that coordinates with locating part is not original arc groove, but being different from the another one arc convex 142 of arc groove, the radian of this arc convex 142 is identical with the radian of aforementioned arc groove.Lateral surface in two correspondences of arc convex 142 is provided with the first arcuate flanks 144 and the second arcuate flanks 146, first group of locating part and second group of locating part are respectively two bearings 148, these two bearings 148 are positioned at the both sides of arc convex 142, and exercisable and the first arcuate flanks 144 or second arcuate flanks 146 is linear contacts.
Figure 17 is certain flashy state diagram of relative housing 42 motions of guard shield 64, at this moment, a bearing 148 as first group of locating part contacts with the first arcuate flanks 144 linearities, as another bearing 148 and the second arcuate flanks 146 maintenance certain intervals of first group of locating part; Simultaneously, keep certain intervals as bearing 148 and first arcuate flanks 144 of second group of locating part, contact with the second arcuate flanks 146 linearities as another bearing 148 of second group of locating part.
Claims (10)
1. portable cutter comprises:
Saw blade;
Housing;
Movably be installed on the guard shield on described housing, this guard shield is provided with the saw blade through hole and is used for making saw blade therefrom pass, this guard shield movably moves between primary importance and the second place with respect to described housing, when guard shield is positioned at primary importance, described saw blade does not pass from the saw blade through hole, when guard shield was positioned at the second place, described saw blade passed from described saw blade through hole;
It is characterized in that:
One in described guard shield and described housing is provided with arc-shaped guide rail, another in both is provided with locating part, described arc-shaped guide rail comprises the first arcuate flanks and the second arcuate flanks, this first arcuate flanks and the second arcuate flanks arrange with one heart, described locating part comprises first group of locating part and second group of locating part, the linearity with in described the first arcuate flanks or the second arcuate flanks that described first group of locating part selected contacts, and the linearity with in described the first arcuate flanks or the second arcuate flanks that described second group of locating part selected contacts.
2. portable cutter according to claim 1, it is characterized in that: described arc-shaped guide rail is located on guard shield, and described locating part is located on housing.
3. portable cutter according to claim 1, it is characterized in that: described arc-shaped guide rail is arc groove.
4. portable cutter according to claim 3, it is characterized in that: described arc groove comprises groove floor, described portable cutter comprises that further the mating part coordinates with described groove floor.
5. portable cutter according to claim 4 is characterized in that: described mating part contacts with described groove floor is linear.
6. portable cutter according to claim 3, it is characterized in that: described arc groove comprises two recess sidewall, described the first arcuate flanks and the second arcuate flanks lay respectively on two recess sidewall.
7. portable cutter according to claim 1, it is characterized in that: described first group of locating part and second group of locating part are respectively bearing.
8. portable cutter according to claim 1, it is characterized in that: described arc-shaped guide rail is arc groove, described the first arcuate flanks and the second arcuate flanks are the medial surface of two correspondences of arc groove, described first group of locating part and second group of locating part are respectively bearing, each bearing is contained in arc groove, and exercisable and the first arcuate flanks or the second arcuate flanks is linear contacts.
9. portable cutter according to claim 1, it is characterized in that: described arc-shaped guide rail is arc opening, described the first arcuate flanks and the second arcuate flanks are formed at two corresponding outsides of arc opening, described first group of locating part and second group of locating part are respectively two bearings, be positioned at the both sides of arc opening as two bearings of first group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks are linear to be contacted, be positioned at the both sides of arc opening as two bearings of second group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks are linear to be contacted.
10. portable cutter according to claim 1, it is characterized in that: described arc-shaped guide rail is arc convex, described the first arcuate flanks and the second arcuate flanks are formed at the lateral surface of two correspondences of arc convex, described first group of locating part and second group of locating part are respectively two bearings, be positioned at the both sides of arc convex as two bearings of first group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks are linear to be contacted, be positioned at the both sides of arc convex as two bearings of second group of locating part, and exercisable and the first arcuate flanks or the second arcuate flanks are linear to be contacted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910204938 CN102029430B (en) | 2009-09-24 | 2009-09-24 | Portable cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910204938 CN102029430B (en) | 2009-09-24 | 2009-09-24 | Portable cutting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102029430A CN102029430A (en) | 2011-04-27 |
| CN102029430B true CN102029430B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910204938 Active CN102029430B (en) | 2009-09-24 | 2009-09-24 | Portable cutting machine |
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| CN (1) | CN102029430B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102848015A (en) * | 2011-06-27 | 2013-01-02 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
| CN102848016B (en) * | 2011-06-27 | 2015-09-09 | 苏州宝时得电动工具有限公司 | Portable cutter |
| CN102950333B (en) * | 2011-08-18 | 2015-04-22 | 苏州宝时得电动工具有限公司 | Portable cutting machine |
| CN102430799A (en) * | 2011-09-08 | 2012-05-02 | 中国人民解放军第四军医大学 | Multipurpose miniature electric saw for electronics |
| CN114951820B (en) * | 2022-04-12 | 2024-03-26 | 宁波天和电动工具有限公司 | Multifunctional mini saw |
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| US6757982B2 (en) * | 2000-05-12 | 2004-07-06 | Exakt Precision Tools Limited | Safety improvements for power tool |
| CN2569960Y (en) * | 2002-08-06 | 2003-09-03 | 胡桂强 | Movable protecting cover structure of electric cutting machine |
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|---|---|
| CN102029430A (en) | 2011-04-27 |
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