CN204262483U - Cutting machine - Google Patents
Cutting machine Download PDFInfo
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- CN204262483U CN204262483U CN201420573599.3U CN201420573599U CN204262483U CN 204262483 U CN204262483 U CN 204262483U CN 201420573599 U CN201420573599 U CN 201420573599U CN 204262483 U CN204262483 U CN 204262483U
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- Prior art keywords
- fixing point
- protective cover
- moving spring
- cutting machine
- fulcrum
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- 230000001681 protective effect Effects 0.000 claims abstract description 89
- 238000009434 installation Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 11
- 238000005452 bending Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 244000287680 Garcinia dulcis Species 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005945 translocation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
- B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
- B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Sawing (AREA)
Abstract
The utility model provides a kind of cutting machine.Annular saw (1) have can support sawtooth (3) rotatably main body (2), main body (2) can be supported on rotationally and cover a part for sawtooth (3) protective cover (40) and across being located at first fixing point (71) of main body (2) and being located at the back-moving spring (70) of the second fixing point (72) of protective cover (40).Back-moving spring (70) is via fulcrum (73) across the first fixing point (71) and the second fixing point (72), and fulcrum (73) is positioned at the position of departing from from the straight line (L) of link first fixing point (71) and the second fixing point (72).
Description
Technical field
The utility model relates to the cutting machine of the protective cover of the surrounding possessing rotary teeth (returning translocation sword) and be configured at this rotary teeth.
Background technology
An example as cutting machine there will be a known annular saw.As shown in Figure 7, annular saw 100 possesses the protective cover 102 of the sawtooth 101 be driven in rotation and the surrounding being configured at sawtooth 101.Protective cover 102 is also referred to as " safety guard " etc.Protective cover 102 can be installed on main body 103 rotationally, and is linked to main body 103 via back-moving spring 104.That is, main body 103 is fixed in one end of back-moving spring 104, and the other end is fixed on protective cover 102.As shown in Figure 8, if protective cover 102 abuts with the machined material X cut off by sawtooth 101, then the active force resisting back-moving spring 104 rotates to arrow a direction.If protective cover 102 rotates to arrow a direction, then sawtooth 101 exposes according to its amount of spin.If remove the abutting to machined material X, then protective cover 102 is rotated to arrow b direction by the active force of back-moving spring 104, returns to the position shown in Fig. 7.
That is, protective cover 102 can rotate between the position shown in the position shown in Fig. 7 and Fig. 8.Therefore, in the following description, be called " initial position " position of the protective cover 102 shown in Fig. 7, the position of the protective cover 102 shown in Fig. 8 is called " maximum rotated position ".
Prior art document
Patent document
Patent document 1: Japan Patent No. 3765425 publication
Back-moving spring 104 shown in Fig. 7, Fig. 8, when protective cover 102 rotates at every turn, is subject to load.So, in order to make the durability of back-moving spring 104 improve, expecting to reduce protective cover 102 and putting on the difference putting on the load of back-moving spring 104 when the load of back-moving spring 104 and protective cover 102 are positioned at maximum rotated position when being positioned at initial position.(elongation Δ is a) less, then the difference of load is also less for the difference of the total length of the back-moving spring 104 when the total length of the back-moving spring 104 when protective cover 102 is positioned at initial position and protective cover 102 are positioned at maximum rotated position.Namely, if the difference of the total length (a2) of the total length (a1) of the back-moving spring 104 shown in reduction Fig. 7 and the back-moving spring 104 shown in Fig. 8, then relative to the elongation of the total length (a1) of the back-moving spring 104 of initial position, (Δ ratio a) diminishes, and the load putting on back-moving spring 104 diminishes.
Here; in order to reduce the elongation of the back-moving spring 104 of the total length (a1) relative to the back-moving spring 104 of initial position, (Δ ratio a) needs to lengthen the total length (a1) of the back-moving spring 104 when protective cover 102 is positioned at initial position as far as possible., can be clear and definite according to Fig. 7: if lengthen the total length (a1) of back-moving spring 104, then main body 103 maximizes.Specifically, the fixing point 104a of the main body side of back-moving spring 104 away from the center of sawtooth 101, so must towards the size of Enlarge the main parts 103 on the left of the paper of Fig. 7.
Utility model content
The purpose of this utility model is, avoids the maximization of cutting machine, and the durability of the back-moving spring of protective cover is improved.
Scheme one of the present utility model is a kind of cutting machine, it is characterized in that having: the main body rotatably supporting rotary teeth; Described main body can be supported on rotationally and cover the protective cover of a part for described rotary teeth; And across being located at the first fixing point of described main body and being located at the back-moving spring of the second fixing point of described protective cover; described back-moving spring is via fulcrum across described first fixing point and described second fixing point, and described fulcrum is positioned at the position of departing from from the straight line linking described first fixing point and described second fixing point.
The cutting machine of scheme two of the present utility model is on the basis of scheme one, it is characterized in that, described fulcrum and described first fixing point of link are compared with the straight line of described second fixing point and be positioned at top.
The cutting machine of scheme three of the present utility model is on the basis of scheme one, it is characterized in that, described fulcrum be positioned at by the vertical line by described first fixing point, the horizontal line by described second fixing point and link described first fixing point and described second fixing point straight line surround region.
The cutting machine of scheme four of the present utility model is on the basis of scheme one; it is characterized in that; the amount of exposing of described rotary teeth is according to the change in location of described protective cover; described protective cover be positioned at described rotary teeth expose when quantitative change obtains minimum position and described protective cover be positioned at described rotary teeth expose quantitative change obtain maximum position time, described fulcrum is positioned at the position of departing from from the straight line linking described first fixing point and described second fixing point.
The cutting machine of scheme five of the present utility model is on the basis of scheme one, and it is characterized in that having the fulcrum post being configured at described fulcrum, described back-moving spring hangs on described fulcrum post.
The cutting machine of scheme six of the present utility model is on the basis of scheme two, it is characterized in that, described back-moving spring is the helical spring that described in pitch ratio, the diameter of fulcrum post is little.
The cutting machine of scheme seven of the present utility model is on the basis of scheme five, it is characterized in that, at the described fulcrum post roller that to be provided with this fulcrum post be rotating shaft, described back-moving spring hangs on described roller.
The cutting machine of scheme eight of the present utility model is on the basis of scheme one; it is characterized in that; described protective cover has the installation portion that can be installed on the ring-type of described main body rotationally, around the rotating shaft being arranged on described rotary teeth described installation portion and this rotating shaft coaxle.
The cutting machine of scheme nine of the present utility model is on the basis of scheme eight, it is characterized in that, described installation portion be installed on rotatably support described rotating shaft bearing around.
The cutting machine of scheme ten of the present utility model is on the basis of scheme nine, it is characterized in that, have the drive source of described rotary teeth and the rotary driving force exported from this drive source be delivered to the reducing gear of described rotating shaft, described reducing gear comprises the first gear, final gear and the idler gear between described first gear and described final gear.
The effect of utility model
According to the utility model, the maximization of cutting machine can be avoided, and the durability of the back-moving spring of protective cover is improved.
Accompanying drawing explanation
Fig. 1 is the side view of the annular saw of the first embodiment, is the side view of protective cover when being positioned at initial position.
Fig. 2 is the sectional view of the annular saw shown in Fig. 1.
Fig. 3 is the enlarged drawing of the protective cover shown in Fig. 1.
Fig. 4 is the side view of the annular saw of the first embodiment, is the side view of protective cover when being positioned at maximum rotated position.
Fig. 5 is the side view of the variation representing the annular saw shown in Fig. 1.
Fig. 6 is the sectional view of other variation representing the annular saw shown in Fig. 1.
Fig. 7 is the side view of annular saw in the past, is the side view of protective cover when being positioned at initial position.
Fig. 8 is the side view of annular saw in the past, is the side view of protective cover when being positioned at maximum rotated position.
In figure:
1-annular saw, 2-main body, 3-sawtooth, 3a-clamping screw, 4-electro-motor, 4a-rotating shaft, 4b-pinion, 5-Poewr transmission mechanism, 5a-output shaft, 5b-gear, 10-motor shell, 20 gear-boxes, 21-bearing cage, 22-bearing, 23-sunk screw, 24-cover, 30-saw hood, 31-inner side cap assembly, 31a-flange part, 31b-inside side walls portion, 32-outside mask parts, 32a-arc sections, 32b-outside side wall portion, 40-protective cover, 41-installation portion, 41a-engaging portion, 42-interior plate, 43-outer panel, 44-locating part, 50-handle, 60-base portion, 61-slit, 62-bolster, 63-adjustment screw, 70-back-moving spring, 71-the first fixing point, 72-the second fixing point, 73 fulcrums (bending point), 74-fulcrum post, 80-separating knife (cutting り sword), 81-bolt, 90-reducing gear, 91-the first gear, 92-idler gear.
Detailed description of the invention
(the first embodiment)
Below, an example of embodiment of the present utility model is described.Annular saw 1 shown in Fig. 1 is the example applying cutting machine of the present utility model.Annular saw 1 shown in Fig. 1 has main body 2 and can be supported on the rotary teeth (sawtooth 3) of main body 2 rotatably.
As shown in Figure 2, main body 2 comprises motor shell 10, gear-box 20, saw hood 30, protective cover 40 and handle 50.Accommodate drive source that is the electro-motor 4 of sawtooth 3 at motor shell 10, contain the Poewr transmission mechanism 5 rotary driving force exported from electro-motor 4 being delivered to sawtooth 3 at gear-box 20.Saw hood 30 covers a part (top) for sawtooth 3, and protective cover 40 covers other part (bottom) of sawtooth 3.
Further, as shown in Figure 1, the bottom of main body 2 is provided with base portion 60, and one end (front end) of base portion 60 can be installed on the end of saw hood 30 rotationally.As shown in Figure 2, be provided with slit 61 at base portion 60, a part (bottom) for sawtooth 3 is outstanding to the below of base portion 60 by this slit 61.Referring again to Fig. 1.The front end of base portion 60 can be linked to the end of saw hood 30 rotatably by bolster 62, on the other hand, be provided with not shown hold-down screw at the other end (rear end) of base portion 60.If unclamp hold-down screw, then can with bolster 62 for fulcrum makes base portion 60 rotate at above-below direction.If base portion about 60 rotates, then the overhang to the sawtooth 3 below base portion changes, the change in depth of cutting-in.In addition, if unclamp the adjustment screw 63 shown in Fig. 1, then can change comprise sawtooth 3 main body 2 relative to the angle of base portion 60.That is, sawtooth 3 deflection can be made.
Motor shell 10 shown in Fig. 2 is formed as tubular by synthetic resin.The direction of principal axis one end eliminating illustrated motor shell 10 is closed, and is provided with opening portion at the direction of principal axis other end.Handle 50 is from the outer peripheral face of motor shell 10 and extend towards oblique rear substantially in parallel with the Plane of rotation of sawtooth 3.
Gear-box 20 is formed by metal (being aluminium in the present embodiment).Its one end of gear-box 20 is docked on the opening portion of motor shell 10, integrated with motor shell 10.That is, the inner space of motor shell 10 is communicated with the inner space of gear-box 20.
The rotating shaft 4a being contained in the electro-motor 4 of motor shell 10 crosses the inside that motor shell 10 and the interface of gear-box 20 enter gear-box 20.Pinion 4b is provided with in the front end of rotating shaft 4a of the inside entering gear-box 20.
Be formed with cylindric bearing cage 21 in the opposing party end (with the end of opposition side, end butting up against motor shell 10) of gear-box 20, contain bearing (ball bearing) 22 in the inner side of this bearing cage 21.The opening portion containing the bearing cage 21 of bearing 22 is utilized the cover 24 that sunk screw 23 is fixed on gear-box 20 and closes.
Bearing 22 can support the output shaft 5a forming Poewr transmission mechanism 5 rotatably.Output shaft 5a is parallel with the rotating shaft 4a of electro-motor 4, and, through bearing 22.One end of output shaft 5a is positioned at the inside of gear-box 20, and the other end protrudes from the outside of gear-box 20.Sawtooth 3 is fixed on the end to the outstanding output shaft 5a in the outside of gear-box 20 by clamping screw 3a.On the other hand, have the gear 5b forming Poewr transmission mechanism 5 at the end winding support of output shaft 5a of the inside being positioned at gear-box 20, this gear 5b engages with pinion 4b.That is, sawtooth 3 can be supported on main body 2 rotatably, and by the driving force rotary actuation of transmitting via Poewr transmission mechanism 5.
As shown in Figure 2, around bearing cage 21, be provided with inner side cap assembly 31.Inner side cap assembly 31 possesses the flange part 31a that the Plane of rotation along sawtooth 3 is expanded and the inside side walls portion 31b extended to the direction that the Plane of rotation with sawtooth 3 intersects from the edge of flange part 31a.Inner side cap assembly 31 is integrally formed with gear-box 20, forms a part for gear-box 20.
On the other hand, outside mask parts 32 are provided with across sawtooth 3 in the contrary side of inner side cap assembly 31.The outside side wall portion 32b that outside mask parts 32 possess the arc sections 32a opposed with the flange part 31a of inner side cap assembly 31 and extend to the direction that the Plane of rotation with sawtooth 3 intersects from the edge of arc sections 32a.The mode that inner side cap assembly 31 and outside mask parts 32 dock each other with the end face of mutual sidewall portion 31b, 32b is arranged opposite, becomes integrated.Therefore, between the flange part 31a and the arc sections 32a of outside mask parts 32 of inner side cap assembly 31, be formed with the gap corresponding with the width of mutual sidewall portion 31b, 32b, sawtooth 3 rotates in this gap.That is, by the part of gear-box 20 that is metal inner side cap assembly 31 with define the saw hood 30 of the part (top) for good and all covering sawtooth 3 with the plastic outside mask parts 32 of gear-box 20 split.
As shown in Figure 3, protective cover 40 has the outer panel 43 of roughly fan-shaped interior plate 42 that the installation portion 41 by the integrally formed ring-type of synthetic resin, the outer peripheral face from installation portion 41 expand to the radial outside of installation portion 41 and the semicircle arcuation opposed with the periphery of interior plate 42.
As shown in Figure 2, the installation portion 41 of protective cover 40 embeds the bearing cage 21 of gear-box 20 around.In other words, the installation portion 41 of protective cover 40 is installed on bearing 22 around.Further in other words, installation portion 41 and the output shaft 5a of protective cover 40 are coaxially arranged on the output shaft 5a (rotating shaft of sawtooth 3) that supported by bearing 22 around.The protective cover 40 being installed on main body 2 is as described above that rotating shaft can rotate in the circumference of sawtooth 3 with bearing cage 21.That is, protective cover 40 can rotate to the arrow a-b direction shown in Fig. 1, Fig. 4.
As shown in Figure 2, the width of protective cover 40 is narrower than the width of saw hood 30.If protective cover as shown in Figure 1 40 rotates to arrow a direction, then protective cover 40 enters the inner side (with reference to Fig. 4) of saw hood 30.In addition, along with protective cover 40 is to the rotation in arrow a direction, the bottom of sawtooth 3 is exposed.The amount of exposing of the bottom of sawtooth 3 increases pro rata with the amount of spin of protective cover 40 to arrow a direction.On the other hand, if the protective cover shown in Fig. 4 40 rotates to arrow b direction, then protective cover 40 enters the outside (with reference to Fig. 1) of saw hood 30.In addition, along with protective cover 40 is to the rotation in arrow b direction, sawtooth 3 is capped, and the amount of exposing of sawtooth 3 reduces.The amount of exposing of sawtooth 3 reduces pro rata with the amount of spin of protective cover 40 to arrow b direction.That is, protective cover 40 covers a part (bottom) for sawtooth 3, and makes the bottom of sawtooth 3 expose as required.Here, the bottom of sawtooth 3 refers to part outstanding compared with base portion 60 downwards.On the other hand, the top of so-called sawtooth 3 refers to part outstanding upward compared with base portion 60.
As shown in Figure 1, the locating part 44 of restriction protective cover 40 to the rotation in arrow b direction is provided with in main body 2.Specifically, if protective cover 40 only rotates ormal weight to arrow b direction, then the interior plate 42 of protective cover 40 is connected on locating part 44, and the rotation of protective cover 40 is limited.That is, protective cover 40 can rotate between the position in the position shown in the figure 1 and shown in Fig. 4.Therefore, in the following description, the position of the protective cover 40 shown in Fig. 1 is called " initial position ", the position of the protective cover 40 shown in Fig. 4 is called " maximum rotated position ".As shown in Figure 1, when protective cover 40 is positioned at initial position, the major part of the bottom of sawtooth 3 is covered by protective cover 40.In addition, the major part on the top of sawtooth 3 is always covered by saw hood 30.That is, when protective cover 40 is positioned at initial position, the quantitative change of exposing of sawtooth 3 obtains minimum, and sawtooth 3 is roughly overall to be covered by saw hood 30 and protective cover 40.
As shown in Figure 1, main body 2 and protective cover 40 are linked by back-moving spring (being helical spring in the present embodiment) 70.Specifically, one end of back-moving spring 70 is fixed on the first fixing point 71 of establishing on the body 2, and the other end of back-moving spring 70 is fixed on the second fixing point 72 be located on protective cover 40.That is, back-moving spring 70 is across the first fixing point 71 in main body and the second fixing point 72 on protective cover.Specifically; the hook being located at one end of back-moving spring 70 be engaging in be located at inner side cap assembly 31 (Fig. 2) not shown engaging portion on, the hook being located at the other end of back-moving spring 70 is engaging on the engaging portion 41a of the outer peripheral face of the installation portion 41 being located at protective cover 40.First fixing point 71 is configured near base portion 60 in vertical direction.Specifically, the first fixing point 71 be configured in the lower surface of base portion 60 top and as far as possible close to the position of base portion 60.Thereby, it is possible to the total length of longer ground reset spring 70.
Further, back-moving spring 70 via fulcrum 73 across the first fixing point 71 and the second fixing point 72.The fulcrum 73 of back-moving spring 70 process is at least positioned at initial position at protective cover 40, is positioned at the position of departing from from the straight line (L) of link first fixing point 71 and the second fixing point 72.Back-moving spring 70 is through being positioned at the result of the fulcrum 73 of above-mentioned position, bending at fulcrum 73 place.So, in the following description, sometimes fulcrum 73 is called " bending point 73 ".As shown in Figure 1, the bending point 73 of back-moving spring 70 is positioned at the region surrounded by the vertical line (V) by the first fixing point 71, the horizontal line (H) by the second fixing point 72 and above-mentioned straight line (L).
Be configured with fulcrum post 74 at fulcrum 73, the roller that to be provided with this fulcrum post 74 in the front end of fulcrum post 74 be rotating shaft, back-moving spring 70 frame is on roller.That is, back-moving spring 70 to hang on the roller be located in above-mentioned zone and bends.In addition, because the roller freely rotated is between back-moving spring 70 and fulcrum post 74, so the flexible of back-moving spring 70 carries out swimmingly.On the other hand, if the diameter of the pitch ratio roller of back-moving spring 70 is large, then back-moving spring 70 may be engaged roller.Therefore, expect that the diameter of the pitch ratio roller of back-moving spring 70 is little.In addition, at omission roller, when directly being hung on fulcrum post 74 by back-moving spring 70, based on reason same as described above, expect that the diameter of the pitch ratio fulcrum post 74 of back-moving spring 70 is little.
Next, the action of the protective cover 40 that the annular saw 1 of present embodiment possesses is described.Under the state being attached on the surface of not shown machined material by the lower surface of the base portion 60 shown in Fig. 1, main body 2 is moved along the surface of machined material.So along with the movement of main body 2, the masterpiece in arrow a direction is used for the protective cover 40 abutted with machined material, and protective cover 40 resists the active force of back-moving spring 70 to equidirectional rotation.Now, protective cover 40 is described above for rotating shaft rotates with bearing cage 21 (Fig. 2).That is, the installation portion 41 being embedded in the protective cover 40 of bearing cage 21 rotates along the circumference of bearing cage 21.If installation portion 41 rotates along the circumference of bearing cage 21, then as shown in Figure 4, the second fixing point 72 (engaging portion 41a) being located at installation portion 41 moves along the outer circumferential arrow a direction of bearing cage 21, and back-moving spring 70 elongates.Specifically, back-moving spring 70 elongates in the mode of one winds portions in the surrounding of installation portion 41.Afterwards, if the abutting of de-preservation cover 40 pairs of machined materials, then protective cover 40 rotates to arrow b direction because of the active force of back-moving spring 70, gets back to the initial position shown in Fig. 1.In addition, back-moving spring 70, after initial position got back to by protective cover 40, also continues to arrow b direction active force protective cover 40.That is, get back to the protective cover 40 after initial position to be pushed on locating part 44.In other words, protective cover 40 is held in initial position by back-moving spring 70.In present embodiment, fulcrum 73 is positioned at the high position of the straight line (L) of link first fixing point 71 when being positioned at initial position than protective cover 40 and the second fixing point 72.Therefore, during any position of protective cover 40 between initial position and maximum rotated position, fulcrum 73 is positioned at the position of departing from from the straight line (L) of link first fixing point 71 and the second fixing point 72.
Here, the total length (A1) of the back-moving spring shown in Fig. 1 is roughly the same with the total length (a1) of the back-moving spring 104 shown in Fig. 7.In addition, the total length (A2) of the back-moving spring 70 shown in Fig. 4 is roughly the same with the total length (a2) of the back-moving spring 104 shown in Fig. 8.That is, (Δ is a) roughly the same with above-mentioned elongation for the difference (elongation Δ A) of the total length (A2) of the back-moving spring 70 when total length (A1) and the protective cover 40 of the back-moving spring 70 when protective cover 40 is positioned at initial position are positioned at maximum rotated position., be straight relative to the back-moving spring 104 shown in Fig. 7, the back-moving spring 70 shown in Fig. 1 bends.That is, the back-moving spring 104 that annular saw 100 in the past possesses is straight when protective cover 102 is positioned at initial position.On the other hand, the back-moving spring 70 that the annular saw 1 of present embodiment possesses bends when protective cover 40 is positioned at initial position.Therefore, the first fixing point 71 as Figure 1 and Figure 4 compared with the fixing point 104a shown in Fig. 7, Fig. 8, close to the center of sawtooth 3.In other words, in the annular saw 1 of present embodiment, compared with the annular saw 100 shown in Fig. 7, Fig. 8, the fixing point of the main body side of back-moving spring 70 is close to the center of sawtooth 3.That is, by making back-moving spring 70 bend, suppress the elongation (Δ A) of back-moving spring 70, and main body 2 is miniaturized.In the present embodiment, fulcrum 73 is positioned at the region surrounded by the vertical line (V) by the first fixing point 71, the horizontal line (H) by the second fixing point 72 and the straight line (L) by the first fixing point 71 and the second fixing point 72.Therefore, the bending angle of the back-moving spring 70 in bending point 73 is obtuse angle, prevents the increase of concentrating, rubbing of the stress in bending point 73.
On the other hand, when maintaining the size of main body 2, between back-moving spring 70 and saw hood 30, produce space.That is, the space being provided with fixing point 104a in Fig. 7, Fig. 8 becomes free space.Therefore, it is possible to this free space is utilized the purposes at other.Such as, as shown in Figure 5, above-mentioned free space can be utilized to fix separating knife 80.Illustrated separating knife 80 is fixed by bolt 81, this bolt 81 be located at the position identical with the fixing point 104a shown in Fig. 7, Fig. 8 or the not shown screwed hole near it combines.In addition, the guide member etc. of the hold-down screw of fixed base 60, the rotation of guide bases 60 also can be configured at above-mentioned free space.That is, by making back-moving spring 70 bend, also can suppress the elongation (Δ A) of back-moving spring 70, and guarantee the space that can effectively apply flexibly in the inner side of main body 2.
The utility model is not limited to above-mentioned embodiment, can carry out various change in the scope not departing from its purport.Such as, the Poewr transmission mechanism 5 shown in Fig. 2 can change as shown in Figure 6.Poewr transmission mechanism 5 shown in Fig. 6 comprises reducing gear 90.Reducing gear 90 possesses as the gear 5b of final gear, the first gear 91 engaged with pinion 4b and the idler gear 92 between the first gear 91 and gear 5b (final gear).That is, the reducing gear 90 being contained in the Poewr transmission mechanism 5 shown in Fig. 6 is two reduction gears.When have employed two reduction gear as shown in Figure 6, position step-down compared with the output shaft 5a shown in Fig. 2 of output shaft 5a (rotating shaft of sawtooth 3), the depth capacity of cutting-in increases.In addition, when have employed two reduction gear as shown in Figure 6, diminish compared with the diameter of the gear 5b shown in Fig. 2 as the diameter of the gear 5b of final gear.If the diameter of gear 5b diminishes, then the bearing 22 for supporting output shaft 5a can select the bearing little with the bearing 22 phase diameter group shown in Fig. 2.Therefore, the diameter being installed on the installation portion 41 of the protective cover 40 of the surrounding of bearing 22 also must diminish, and the elongation (Δ A) of back-moving spring 70 diminishes further.
Also the first fixing point 71 can be arranged on the position higher than the second fixing point 72 (upper end of bearing cage 21), fulcrum 73 be arranged in the region that surrounded by the horizontal line by the first fixing point 71, the vertical line by the second fixing point 72 and the straight line by the first fixing point 71 and the second fixing point 72.In this situation, the angle of bend at bending point 73 place of back-moving spring 70 remains obtuse angle.In addition, the total length of back-moving spring 70 is guaranteed, main body 2 is miniaturized.
In addition, above-mentioned fulcrum 73 is formed by fulcrum post 74 and with the roller that fulcrum post 74 is rotating shaft., fulcrum post 74 can switch to rib.In this situation, in order to prevent back-moving spring 70 hooking, expecting that the two ends making clamping screw have fillet, preventing back-moving spring 70 hooking.
In addition, in the parts shown in Fig. 5, Fig. 6, identical with the parts illustrated or that essence is identical parts are marked identical symbol and omitted the description.
Claims (10)
1. a cutting machine, is characterized in that, has:
Rotatably support the main body of rotary teeth;
Described main body can be supported on rotationally and cover the protective cover of a part for described rotary teeth; And
Across being located at the first fixing point of described main body and being located at the back-moving spring of the second fixing point of described protective cover,
Described back-moving spring is via fulcrum across described first fixing point and described second fixing point, and described fulcrum is positioned at the position of departing from from the straight line linking described first fixing point and described second fixing point.
2. cutting machine according to claim 1, is characterized in that,
Described fulcrum is compared the straight line linking described first fixing point and described second fixing point and is positioned at top.
3. cutting machine according to claim 1, is characterized in that,
Described fulcrum be positioned at by the vertical line by described first fixing point, the horizontal line by described second fixing point and link described first fixing point and described second fixing point straight line surround region.
4. cutting machine according to claim 1, is characterized in that,
The amount of exposing of described rotary teeth according to the change in location of described protective cover,
Described protective cover be positioned at described rotary teeth expose when quantitative change obtains minimum position and described protective cover be positioned at described rotary teeth expose quantitative change obtain maximum position time, described fulcrum is positioned at the position of departing from from the straight line linking described first fixing point and described second fixing point.
5. cutting machine according to claim 1, is characterized in that,
There is the fulcrum post being configured at described fulcrum,
Described back-moving spring hangs on described fulcrum post.
6. cutting machine according to claim 5, is characterized in that,
Described back-moving spring is the helical spring that described in pitch ratio, the diameter of fulcrum post is little.
7. cutting machine according to claim 5, is characterized in that,
At the described fulcrum post roller that to be provided with this fulcrum post be rotating shaft, described back-moving spring hangs on described roller.
8. cutting machine according to claim 1, is characterized in that,
Described protective cover has the installation portion that can be installed on the ring-type of described main body rotationally,
Around the rotating shaft being arranged on described rotary teeth described installation portion and this rotating shaft coaxle.
9. cutting machine according to claim 8, is characterized in that,
Described installation portion be installed on rotatably support described rotating shaft bearing around.
10. cutting machine according to claim 9, is characterized in that,
There is the drive source of described rotary teeth and the rotary driving force exported from this drive source be delivered to the reducing gear of described rotating shaft,
Described reducing gear comprises the first gear, final gear and the idler gear between described first gear and described final gear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-207867 | 2013-10-03 | ||
| JP2013207867A JP2015071201A (en) | 2013-10-03 | 2013-10-03 | Cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204262483U true CN204262483U (en) | 2015-04-15 |
Family
ID=51863670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420573599.3U Expired - Lifetime CN204262483U (en) | 2013-10-03 | 2014-09-30 | Cutting machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2015071201A (en) |
| CN (1) | CN204262483U (en) |
| DE (1) | DE202014104662U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206615A (en) * | 2014-10-30 | 2017-09-26 | 罗伯特·博世有限公司 | Lower blade shroud for annular saw |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6915973B2 (en) * | 2016-09-02 | 2021-08-11 | 株式会社マキタ | Work machine |
-
2013
- 2013-10-03 JP JP2013207867A patent/JP2015071201A/en active Pending
-
2014
- 2014-09-29 DE DE202014104662.3U patent/DE202014104662U1/en not_active Expired - Lifetime
- 2014-09-30 CN CN201420573599.3U patent/CN204262483U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206615A (en) * | 2014-10-30 | 2017-09-26 | 罗伯特·博世有限公司 | Lower blade shroud for annular saw |
Also Published As
| Publication number | Publication date |
|---|---|
| DE202014104662U1 (en) | 2014-10-20 |
| JP2015071201A (en) | 2015-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tokyo, Japan Patentee after: HITACHI KOKI Co.,Ltd. Address before: Tokyo, Japan Patentee before: Hitachi Koki Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150415 |