CN1892013A

CN1892013A - Air filter

Info

Publication number: CN1892013A
Application number: CNA2006101054080A
Authority: CN
Inventors: J·科恩; H·滋梅曼恩
Original assignee: Andreas Stihl AG and Co KG
Current assignee: Andreas Stihl AG and Co KG
Priority date: 2005-07-06
Filing date: 2006-07-06
Publication date: 2007-01-10
Anticipated expiration: 2026-07-06
Also published as: DE102005031501B4; DE102005031501A1; CN1892013B

Abstract

An air filter for an internal combustion engine of a hand-held tool such as a power saw, an abrasive cutting wheel, a trimmer etc., has a case element (12) for limiting the sweet gas chamber of the air filter. The air filter has a filter element (11), wherein the combustion air used for the internal combustion engine is sucked through the filter element (11) to the sweet gas chamber. The filter element (11) is detachablely fixed to the case element (12). In order to make the assemble and disassemble procedure of the filter element simple, and to make the filter element (11) has at least one connection board (26), the filter element can be inserted into a seat (17) of the case element (12), wherein the filter element (11) is positioned at least at one direction with respect to the case element (12) by the connection board (26) in the seat (17), and wherein the connection board (26) is held in the seat (17), so that the filter element (11) can swing corresponding to the case element (12).

Description

Air filter

Technical field

The present invention relates to a kind of air filter that is used for the walk-behind type working appliance just like the explosive motor of power saw, slitting wheel, removing cutting device etc., it has the case member in limit air filter pure qi (oxygen) chamber, also has a filter element, wherein the combustion air used of internal-combustion engine is pumped in the pure qi (oxygen) chamber by filter element, and wherein removable the turning up the soil of filter element is fixed on the case member.

Background technique

By US 3,203,158 a kind of air filters that are used for the suction channel of explosive motor of cicada, it can be fixed on the pumping tube with fast moving hook.Be provided with four fast moving hooks, they must be pulled down so that change filter.For this reason must be easily near filter element.In order to pull down filter element all fast moving hooks are side by side moved.All fast moving hooks are positioned on the pumping tube.This makes the replacing of filter element more difficult.

Summary of the invention

The task of invention is to propose a kind of air filter that belongs to this type of pattern, even it also can be changed when accessibility is restricted easily and quickly.

This task solves by a kind of air filter, it has the case member in limit air filter pure qi (oxygen) chamber, also has a filter element, wherein the combustion air used of internal-combustion engine is pumped in the pure qi (oxygen) chamber by filter element, and wherein removable the turning up the soil of filter element is fixed on the case member.According to the present invention, for filter element is fixed on the case member, be provided with at least one connecting plate, it can be inserted in the seat, wherein connecting plate makes filter element locate at least one direction with respect to case member in being present, and in wherein connecting plate keeps being present, so that filter element is swung with respect to housing parts.

Because it is simple and can make the filter element swing that connecting plate can insert the assembling that makes filter element in present.Correspondingly can take apart and filter element is taken out in seat by swing.Filter element must be with limitation can be approaching in the present position, inserts connecting plate enough space because only must be useful on here.The operator needn't reach the position of seat for assembling and dismounting filter element.Even therefore filter element also can be assembled and dismantle easily under the position dimension condition of limited.Seat and connecting plate can design simply, thus make air filter can be simply and cost advantageously make.Connecting plate can be arranged on the filter element or on the housing parts.Seat is arranged on the other separately member, that is to say on the case member or on the filter element.

For being fixed on, filter element preferentially is provided with at least one fast moving hook on the case member.By fast moving hook filter element preferentially is being fixed on the case member in the easy close position after swing.Fast moving hook especially is arranged in of filter element and is opposite on the side of connecting plate, thus connecting plate and fast moving hook that filter element is realized is well secured.A kind of simple technological scheme can realize as follows: fast moving hook and a retention tab acting in conjunction that is molded on the case member.Fast moving hook preferentially is designed to be substantially L-shape.L-shape design proposal can make fast moving hitcher that enough big movable property is arranged.

It is smooth that connecting plate is designed to, and can insert in one direction in the seat, and this is parallel to the plane of connecting plate.For being inserted, connecting plate therefore just only needs little structure space in the seat.Seat preferentially has a back wall, and connecting plate abuts on the back wall.The layout of the back wall by seat just can be set pretightening force, with pretightening force filter element is fixed on the case member.Back wall is made of two planar sections aptly, and these two planar surface portion sections have angle mutually and link to each other on a limit.Two planar surface portion sections of back wall have constituted the supporting of a connecting plate simple in structure in present.On the slip limit that constitutes by arris, filter element is led in swing process.These two plane manufacturing easily, thereby form a kind of structure that can make easily.Regulation makes seat have two sidewalls, they arrange perpendicular to arris and determined present in the position of the longitudinal direction upper junction plate of arris.

Make case member have one around the edge, filter element just abuts on the edge.The back wall of seat and the edge of case member advantageously act on filter element in the opposite direction.Filter element is fixed perpendicular to the back wall of seat or on perpendicular to the direction at case member edge at one, and the other clamp structure that fast moving hook or use where necessary only is used to accept torque, and this torque is applied by the back wall of seat and the edge of case member.

For the fixing position of filter element on case member, suitable on filter element, fixed a pin, it stretches in the groove of case member and the longitudinal direction that is transverse to pin is fixed the position of filter element.Therefore can partly compensate the tolerance between connecting plate and seat and realize accurate localization.Design code make filter element have the filtering material on plane, it is arranged in the framework.Filtering material preferably is connected with frame fixation, thereby can clean filter element easily.But filtering material also can be fixed on the framework with pulling down, and filtering material can be changed.In order to make assembling and dismounting simple and filter element is fixed on the case member reliably, design code make filter element have two connecting plates and two fast moving elements, they all are fixed on the framework of filter element.

Description of drawings

Be illustrated with reference to the accompanying drawings below the embodiments of the invention.Accompanying drawing is depicted as:

Fig. 1: the side view of a power saw;

Fig. 2: the three-dimensional view of a filter element;

Fig. 3: the partial sectional view of the air filter of power saw shown in Figure 1;

Fig. 4: the enlarged view of local I V among Fig. 3;

Fig. 5: the enlarged view of the V of office among Fig. 3;

Fig. 6: the side view of air filter when packing filter element into;

Fig. 7 a: embodiment's of filter element three-dimensional view;

Fig. 8: the three-dimensional view of air filter shown in Figure 7 when packing filter element into;

Fig. 9: the three-dimensional view that the air filter shown in Figure 8 of filter element is housed;

Figure 10: the amplification partial sectional view of local X among Fig. 9.

Embodiment

Fig. 1 represents a walk-behind type working appliance, the just side view of a power saw 1.Power saw 1 has a shell 2, and it has a rear portion handgrip 3 and a handle tube 4 that is used to guide power saw 1.On the shell 2 that is positioned at rear portion handgrip 3 opposite side, be provided with 5, one of guard rails in Fig. 1 unshowned saw chain around this guard rail circulation revolution.In order to drive saw chain, power saw 1 has an explosive motor of being located at 2 li on shell.Explosive motor aspirates combustion air by air filter from surrounding environment.

Fig. 2 has represented the three-dimensional view of filter element 11 of the air filter of power saw 1.Filter element 11 has a framework 16, framework have around the edge, Sealing 20 is arranged on this edge.Framework 16 has a kind of graticule mesh 18, and the filtering material 17 on the plane of filter element 11 remains on the graticule mesh.Be provided with the peg 19 of four projectioies on graticule mesh 18, they are used as the protection to filtering material 17 when filter rinsed.On framework 16, mold two connecting plates 26.Connecting plate 26 points in parallel to each other, and flatly, in the occupied plane around the edge by framework 16, extend.The fast moving hook 14 that on framework 16, molds two L-types on two connecting plate 26 opposite side that is positioned at framework 16.To be described in detail below the function of connecting plate 26 and fast moving hook 14.

Fig. 3 has represented the filter element 11 on a case member 12 of power saw 1.Filter element 11 has constituted air filter 10 with case member 12.Case member 12 is fixed on another case member 8 of power saw 1 by a screw 9.At

case member

8 and 12 li suction channels 6 that respectively are provided with the internal-combustion engine of one section power saw 1 of case member.Be provided with screw 13 in the both sides of suction channel 6, they are used for fixing a Carburetor of not expressing in Fig. 3, and this Carburetor is located between

case member

8 and 12 and is provided with other one section suction channel 6 therein.In Fig. 3, represented one of them screw 13.Upwards be provided with an injection for 41 li in the adverse current of Carburetor and accept cup 28 in the pure qi (oxygen) chamber of air filter 10.On suction channel 6, be used for scavenging and store up the air passageways 7 of air (Sp ü lvorlagenluft) in advance and lead in the pure qi (oxygen) chamber of air filter 10 41 li.Pure qi (oxygen) chamber 41 is limited by case member 12 and filter element 11.

The filter element 11 of air filter 10 is fixed on the case member 12 of power saw 1 by two connecting plates 26 and two fast moving hooks 14.For these two connecting plates 26 extend on shell 12, mold the seat 27 li.The stop protrusion 15 that has 34, one fast moving hooks 14 of retention tab at that side case member 12 that is opposite to seat 27 is hooked respectively on retention tab 34.Can stipulate to make connecting plate 26 to take shape on the shell, and be fixed on the filter element the seat 27 li.

Amplify among Fig. 4 and represented a fast moving hook 14.Fast moving hook 14 is designed to the L-type basically, and the short supporting leg 37 of wherein fast fortune hook 14 takes shape on the framework 16, and extends in the plane around the edge of framework 16, extends on case member 12 and second long leg 38 of fast moving hook 14 is approximately perpendicular to this place.On the outer side surface of the knee 39 of fast moving hook 14, just in two supporting legs 37 and 38 positions that are connected with each other of fast moving hook 14, can mold rib on the outer side surface of knee 39, these ribs are transverse to two supporting legs 37 of fast moving

hook

14 and 38 longitudinal direction extends.This rib has stoped generation slippage when air filter 10 is installed.Form stop protrusion 15 at fast moving hook 14 on long leg 38 towards case member 12 those sides.Under filter element 11 assembling conditions, its face 43 smooth, that be approximately perpendicular to long leg 38 of stop protrusion 15 usefulness abuts in retention tab 34 rears.Retention tab 34 takes shape on the shell 12.Stop protrusion 15 has an inclined-plane 44 on that face of face 43 being opposite to.Retention tab 34 has an inclined-plane 45 in the side towards filter element 11.When having served as filter element part 11 and swinging on the case member 12, inclined-plane 44 and 45 slides mutually and therefore makes fast moving hook 14 easier snapping in.In order to unclamp fast moving hook 14, make its long leg 38 have the handle rib towards case member 12 those sides at it, the operator can act on and be used for unclamping fast moving hook 14 on the rib.

As shown in Figure 4, case member 12 have one around edge 21, the Sealing 20 of filter element 11 just abuts on this edge.Sealing 20 ride on its outer side surface around edge 21 on.Thereby guaranteed good sealing.

In Fig. 5, amplify and represented that seat 27 is together with connecting plate 26.Seat 27 has a back wall 30, and connecting plate 26 abuts on the back wall 30.Back wall 30 is made of two smooth portion's sections 31 and 32, wherein away from portion's section 31 of filter element 11 be roughly parallel on the case member 12 around edge 21.Second section 32 tilts with respect to 31 one-tenth obtuse angle alpha of first section.Connecting plate 26 abuts on first section 31 during state on being loaded on case member 12.These two portion's sections 31 and 32 are close to mutually on an arris 33 and are connected, and this arris 33 has constituted the slip arris 36 of filter element 11.The layout of seat 27 makes slip arris 36 be arranged to and around edge 21 spacing is arranged.Seat 27 has two sidewalls 29, has wherein represented one in Fig. 5.

These two sidewalls 29 abut in connecting plate 26 both sides, and filter element 11 is located with respect to case member 12 on the longitudinal direction of axis of oscillation 36.Realize the location for making filter element 11, on the framework 16 of filter element 11, be provided with a pin 25, it extend into one in the groove of 12 li corresponding layouts of case member, be a hole 24 herein, and therefore make filter element 11 be positioned on the direction of a longitudinal direction that is transverse to pin 25, just be positioned basically in the plane around edge 21 of case member.

In Fig. 6, represented the installation of filter element 11 on case member 12.As shown in Figure 6, filter element 11 is at first corresponding to the longitudinal direction of connecting plate 26 and be parallel on the direction of insertion 42 on plane of connecting plate 26 and arrange present 27 li.Direction of insertion 42 is parallel to second section 32 of the back wall 30 of seat 27.Therefore filter element 11 leads on back wall 30.Filter element 11 is swung on arrow 35 directions.Filter element 11 poor between the angle α between this angle that must swing is corresponding to the portion's section 31 and 32 180 ° and seat 27 back wall 30.When swing, slide on the slip arris 36 of connecting plate 26 present 27.After predetermined angular of filter element 11 swings, fast moving hook 14 and retention tab 34 engagements, and also inclined-plane 44 and 45 (Fig. 4) slides mutually.Then stop protrusion 15 snaps onto retention tab 34 back.This is shown among Fig. 3.In recline first section 31 (Fig. 5) of seat 27 of this position upper junction plate 26 of filter element 11.The seat 27 by the connecting plate 26 of filter element 11 press to around edge 21.On opposite side, filter element 11 by fast moving hook 14 keep with around edge 21 contact.Therefore filter element 11 is securely fixed on the case member 12.

For filter element 11 is taken apart, the long leg 38 of fast moving hook 14 is upwards drawn, stop protrusion 15 and retention tab 34 are separated from.Because the pretightening force of Sealing 20 is pressed filter element 11 and is left and outwards swing.On this position the operator can be in contrast to direction of insertion 42 shown in Figure 6 from seat 27 li take out filter elements 11.The framework 16 of filter element 11 preferably is made of plastics.Case member 12 also can be made of plastics.Fast moving hook 14 takes shape on the framework 16 aptly.Connecting plate 26 equally also can take shape on the framework 16.Seat 27 and retention tab 34 advantageously take shape on the case member 12.Therefore for being fixed, filter element 11 do not need to have subsidiary member.

Filtering material 17 is connected with graticule mesh 18 with framework 16 securely in the embodiment shown in Fig. 1 to 6.

The another kind of embodiment who in Fig. 7 to 10, has represented filter element 51.Components identical is represented with identical reference character as at Fig. 1 to 6.Filter element 51 has the filtering material 57 on plane and one and is designed to smooth framework 56 basically.Filtering material 57 has perforate 52 and is used for taking shape in pin 25 on the framework 56, that do not express at Fig. 7.On framework 56, mold two connecting plates 26 and be used to be encased in 27 li of the seats of case member 12, and mold two fast moving hooks 14.Framework 56 has the graticule mesh support 58 that abuts on the filtering material 57.

Fig. 8 represents that filter element 51 is installed on the case member 12 of power saw.Filtering material 57 places on the edge 21 of case member 12.The boundary dimension of filtering material 57 roughly is equivalent to the boundary dimension at edge 21.Framework 56 is inserted into 27 li of seats along its connecting plate 26 of direction of insertion 42 usefulness, and is swinging on the direction of arrow 35 on the case member 12, snaps onto the back of the retention tab 34 of case member 12 until fast moving hook 14.

Represented that in Fig. 9 air filter 51 is on the position that is loaded on the case member 12.Connecting plate 26 is arranged present 27 li and with fast moving hook 14 framework 56 is fixed on the case member 12.Filtering material 57 is clipped between framework 56 and the case member 12.

As shown in figure 10, take shape in pin 25 on the framework 56 and extend into 24 li in the hole be located on the case member 12.On each connecting plate 26, be provided with simultaneously a pin 25.Framework 56 have one around edge 53, it presses to the edge 21 of case member 12 with filtering material 57, and the pure qi (oxygen) chamber 41 of the air filter 10 that is constituted by filter element 51 and case member 12 is closed with respect to surrounding environment.

Because filtering material 57 is clamped between framework 56 and case member 12, therefore can change filtering material 57 easily.For this needs fast moving hook 14 is opened, change filtering material 57 and make fast moving hook that locking is firmly again.

Reference numerals list

The hole that 1 power saw is 24 12 li

Pin on 2 shells 25 16

Angle between the 3 rear portion handgrip α 31 and 32

Connecting plate on 4 handle tubes 26 11

Seat on 5 guided ways 27 12

6 suction channels 28 spray accepts cup

The sidewall of 7 air ducts 29 27

The back wall of 8 case members 30 27

The First section of 9 screws 31 30

Second section of 10 air cleaners 32 30

Arris between 11 filter elements 33 31 and 32

Retention tab on 12 case members 34 12

The end of 13 screws 35 27

14 fast moving hook 36 axiss of oscillation

First supporting leg of 15 14 stop protrusion 37 14

Second supporting leg of 16 10 framework 38 14

The knee of 17 filtering materials 39 14

On 18 graticule mesh 40 18 in flakes

The pure qi (oxygen) chamber of the peg 41 10 on 19 18

The direction of insertion of the Sealing 42 26 on 20 16

The face at the edge 43 15 on 21 12

Inclined-plane on the stiffening rib 44 15 on 22 14

Inclined-plane on the 23 handle ribs 45 34

Claims

1. the air filter that is used for a kind of explosive motor of walk-behind type working appliance, it has the case member (12) in limit air filter (10) pure qi (oxygen) chamber (41), also has a filter element (11,51), wherein the combustion air used of internal-combustion engine is by filter element (11,51) be pumped into lining, pure qi (oxygen) chamber (41), and filter element (11 wherein, 51) removable turning up the soil is fixed on the case member (12), it is characterized in that, for making filter element (11,51) be fixed on the case member (12), be provided with at least one connecting plate (26), it can be inserted into seat (27) lining, and wherein present (27) lining of connecting plate (26) makes filter element (11,51) locate at least one direction with respect to case member (12), and wherein connecting plate (26) keeps present (27) lining, so that filter element (11,51) can be swung with respect to housing parts (12).

2. by the described air filter of claim 1, it is characterized in that filter element (11,51) is fixed on the case member (12) by at least one fast moving hook (14).

3. by the described air filter of claim 2, it is characterized in that, fast moving hook (14) is arranged on the side that is positioned at connecting plate (26) opposite of filter element (11,51), and fast moving hook (14) and retention tab (a 34) acting in conjunction that takes shape on the case member (12).

4. by the described air filter of claim 2, it is characterized in that fast moving hook (14) is a L-shape.

5. by the described air filter of claim 1, it is characterized in that connecting plate (26) is smooth, and can be inserted into seat (27) lining on a direction (42), this seat is parallel to the plane of connecting plate (26).

6. by the described air filter of claim 1, it is characterized in that seat (27) has a back wall (30), connecting plate (26) abuts on this back wall.

7. by the described air filter of claim 6, it is characterized in that back wall (30) is made of two smooth portion's sections (31,32), these two portion's sections are (α) and adjoin each other on an arris (33) mutually in an angle; And seat (27) has two sidewalls (29), and they are arranged perpendicular to arris (33), and have stipulated the position of present (27) lining of connecting plate (26) along the longitudinal direction of arris (33).

8. by the described air filter of claim 6, it is characterized in that, case member (12) have one around edge (21), filter element (11,51) abuts on this edge; And the seat back wall (30) of (27) and the edge (21) of case member (12) act on filter element (11,51) in the opposite direction.

9. by the described air filter of claim 1, it is characterized in that, at filter element (11,51) fixed at least one pin (25) on, it extend in the groove on the case member (12), and determined that filter element (11,51) is transverse to the position of pin (25) longitudinal direction on case member (12).

10. by the described air filter of claim 1, it is characterized in that filter element (11,51) has the filtering material (17,57) on plane, this filtering material is arranged in a framework (16,56) lining.

11., it is characterized in that filtering material (17) is fixedlyed connected with framework (16) by the described air filter of claim 10.

12., it is characterized in that removable the turning up the soil of filtering material (57) is fixed on framework (56) lining by the described air filter of claim 10.

13. by the described air filter of claim 1, it is characterized in that filter element (11,51) has two connecting plates (26) and two fast moving hooks (14), they are fixed on the framework (16,56).

14., it is characterized in that described working appliance is a kind of power saw, slitting wheel, removing cutting device by the described air filter of claim 1.