DE10152907A1 - Hinge for a stove hatch - Google Patents

Abstract

The invention relates to a hinge for a stove door, comprising a housing (1) in which a plug-in part (2) is rotationally (10) mounted. In order to be able to easily influence the torque produced by the spring, a spring guide (3) which is loaded by a spring (6), preferably a pressure spring, is provided, said spring guide being fitted with a roller (15) that is guided through a curved section (9) of the plug-in part (2).

Description

The invention relates to a hinge for a stove flap, which is also known as a "stove share nier "can be referred to, according to the preamble of claim 1.

Such stove hinges are already known. They generally have a Ge housing on which a plug-in part is pivotally mounted. The housing is on the Stove flap attached. The plug is in the stove or in the housing of the Her of, for example, a side wall, inserted or otherwise fastened there. However, it is also possible to attach the housing to the stove and the plug-in part to the Fasten the stove flap. The housing can be essentially box-shaped be designed. The pivot axis can be in a corner of the housing, for example in a lower outer corner, especially on that side of the housing, which protrudes from the part of the plug-in part protruding from the housing is agile.

Stove hinges of this type often have a spring through which the weight the stove flap should be compensated. The stove flap is usually on egg ner horizontal axis pivotally mounted on the front of the cooker, whereby the stove flap is in the closed position vertically above the swivel axis and who is swung out to an angle of, for example, 90 ° that can. The opening torque increases in the course of this pivoting process the hearth flap in a substantially sinusoidal shape. By the Fe that of the stove hinge can this opening torque (door torque) the Stove flap can be compensated. Furthermore, the spring can also be a agreed closing force of the stove flap are generated in its closed position.  

The object of the invention is to propose a stove hinge through which the torque generated by the spring can be influenced in a simple manner can.

According to the invention, this object is achieved by the characterizing features of Claim 1 solved. The hinge includes a spring guide that is supported by a spring is burdened. This spring is preferably a torsion spring or coil spring. The spring control is provided with a roller that is in a curve (Guide curve, guideway) of the plug-in part is guided. Here it is, however it is not absolutely necessary for the roll to roll. Instead of a role in the real sense can also use another management element Det, which is rigid and in the curve or guideway slides or which is pivotable and which when sliding along the curve or guideway can perform a pivoting movement. The role or the other guide element can be guided in the curve or guideway his. However, it can also go through the curve or guideway in other ways be led.

Due to the design of the curve, this can be done by the hinge on the Herdklap pe exerted torque can be influenced. This torque depends on that Course and the inclination of the guideway and the angle of rotation reached or opening angle. The spring will advance over the course of the guideway voltage controlled. Special settings can be made via the inclination of the guideway lungs, detents and / or additional moments can be achieved.

Advantageous further developments are described in the subclaims.

The spring is preferably designed as a compression spring. A compression spring, in particular a torsion spring that is under pressure is less susceptible to vibration than a spring under tension, so that less disturbing noises are generated  become. However, a tension spring can also be used to carry out the invention be det.

Another advantageous development is characterized in that the role is provided on an outwardly facing tab of the spring guide. before the roller is preferably located outside the housing of the hinge. here by the distance and thus the lever arm between the pivot axis of the Hinge and roller are enlarged, which makes the force of the spring better can be exploited. Accordingly, it is possible to make the spring smaller dimension and manage with lower spring forces. Through the Absen Tension of the spring force can make the hinge weaker and smaller the, because the components of the hinge absorb only lower forces have to.

According to a further advantageous development, the curve points in the closing position development of the hinge on an inclination causing the required closing force. According to the legal regulations, stove flaps have a certain closing achieve strength. This closing force can be caused by the inclination of the cure ve easily generated.

Another advantageous development is characterized in that the curve has a neutral section at a certain opening of the hinge This is preferably an opening angle of approximately 20 ° forms the so-called "grill stop". However, the angle can be in the range of 10 ° are up to 30 ° and in certain cases even more or less. The neutral section of the curve causes the stove flap to "grill stop" at the predetermined opening angle.

The curve is preferably designed such that the due to the curve ver spring force generated the opening torque or door torque of the stove flap essentially compensates. If the curve is in the closed position of the Hinge has an inclination causing the required closing force  and / or if the curve makes a new one at a certain opening of the hinge central section, the aforementioned advantageous development can be made in this way be designed so that the spring force generated due to the curve shape the opening balancing moment of the stove flap essentially in those areas, which was outside the closed position and / or the specific open position gene.

The spring guide is preferably guided in the housing. This leadership will preferably achieved by a support, which is preferably a Pad is made of plastic or another suitable material.

Another advantageous development is characterized in that the lever arm of the role is changeable relative to the pivot axis of the plug-in part. before it is partial if the spring guide has a guide pin which is in a another curve of the housing is guided. It is also possible, however provision pin in the housing and the further curve in the spring guide. By changing the length of the lever arm between the roller and the Swivel axis, which is caused by a movement of the spring guide relative to the can be generated from the hinge on the stove flap trained torque can also be influenced. The movement of the lead can be led over the further curve (guide curve, guideway) where by the lever arm of the acting spring force in relation to the pivot point of the Plug part can be changed. The torque is superimposed the effects of the curve of the plug and the other curve controlled. here the range of influencing the torque can be increased by. Furthermore, the size of the hinge can be reduced.

The spring preload can be changeable. It is advantageous if an An stroke for the spring is adjustable. This stop can be designed as a mother be or include a nut, so that a rotation of a change in Spring preload can be generated. The arrangement is preferably such made that the nut or other component to change the spring  Preload is adjustable by hand. The hinge can change the spring preload can be adapted to different stove flaps.

Another advantageous development is characterized in that with the Plug part is connected to a locking part. The locking part is preferably pivotable. It is advantageous if the pivot axis of the locking part is displaceable. The Locking part can have a wedge. The locking part preferably has a latch se on.

Embodiments of the invention are described below with reference to the accompanying Drawing explained in detail. In the drawing shows

Fig. 1, the hinge in the closed position in a view from behind,

Fig. 2 view of the hinge according to Fig. 1 in the closed position in a side,

Fig. 3, the hinge according to Fig. 1 and Fig. 2 in an opening position with an opening angle of approximately 45 ° in a side view;

Fig. 4, the hinge according to Fig. 1-3 opening angle in the open position with a Publ of substantially 90 ° in a side view;

Fig. 5 shows the hinge according to Fig. 1-4 in the closed position to an on view from above,

Fig. 6 shows the variation of the torque as a function of the opening angle of the hinge,

Fig. 7 shows a modification of the hinge with a lock part in the apply position verrie,

Fig. 8, the hinge of FIG. 7 in a partially open position and

Fig. 9, the hinge according to FIGS. 7 and 8 in the locked position.

The housing 1 of the hinge, which can also be referred to as a hinge body, can be installed in the stove door. However, the reverse arrangement could also be chosen in which the housing 1 of the hinge is installed in the stove or is otherwise attached to the stove (not shown in the drawings). On the housing 1 , a plug part 2 is pivotally mounted about an axis 10 . The connection to the stove is made via the plug-in part 2 , which snaps into the stove or is otherwise fastened. The pivot axis 10 is located in the rear lower part of the housing 1 on the side of the housing 1 which faces away from the plug part 2 . The plug part 2 protrudes from the housing 1 .

A spring guide 3 is guided in the housing 1 . The spring guide 3 comprises an upwardly projecting from the housing 1 guide rod 11 , at the obe rem end a stop 12 is provided. A compression spring 6 is clamped between this stop 12 and a plastic pad 5 . The stop 12 can be designed as a nut (not shown in the drawing), which can be rotated on a thread provided at the upper end of the guide rod 11 (if not shown in the drawing), so that this results in the prestressing of the compression spring 6 can change. In this case, the stop 12 designed as a nut can be adjusted by a tool, for example a screwdriver, a wrench or an Allen key. Furthermore, the mother can also be formed out as a wing nut or other hand-operated nut.

The plastic pad 5 lies on the upper end face of the housing 1 . It has a downward-pointing part (not shown in the drawing) which lies in a corresponding recess in the upper end face 13 of the housing and through which the guide rod 11 of the spring guide 3 is guided.

The spring guide 3 has at its lower end an outwardly facing La cal 14 , to which a pin 7 is attached, around which a roller 15 is rotatably mounted.

Furthermore, a guide pin 8 is provided in the spring guide 3 , in particular a pressed pin, which is guided in a further curve 4 provided in the housing 1 . It is advantageous if the pin 8 is lower, that is closer to the roller 15 , than shown in the drawing, since then the torque acting on the spring guide 3 becomes lower. A change in the lever arm h between the axis 10 and the roller 15 takes place over the course of the further curve 4 . The further curve 4 has the shape of a longitudinal slot, which runs in the upper, longer area in a straight line and parallel to the direction of movement of the spring guide 3 and in the lower end area in the manner shown in FIGS. 2 to 4 to the left, i.e. away from the roller 15 is inclined. It is hereby achieved that the lever arm h decreases towards the completely open position shown in FIG. 4.

In the plug-in part 2 , a curve 9 is provided which is penetrated by the roller 15 and in which this roller 15 is guided.

At its beginning, that is to say at the point at which the roller 15 is located when the hinge assumes the closed position shown in FIG. 2, the curve 9 has an initial section 16 which has a certain inclination by means of which a predetermined closing force is generated becomes.

This initial section 16 is followed by a convex section, which can be referred to as a cam 17 . On the side of the cam 17 facing away from the starting section 16 , a neutral section 18 is provided, which lies at a point on the curve 9 which corresponds to an opening angle of approximately 20 °. If the roller 15 is in the region of this neutral section 18 , the stove flap is in a stable position in which the opening torque (door torque) of the stove flap is essentially the same as the counter-torque generated by the compression spring 6 . In this position the stove flap is in the so-called grill stop.

The adjoining area 19 of the curve 9 is designed such that the spring force generated in the course of this section 19 substantially compensates for the opening moment of the flap.

This will be explained below with reference to FIG. 6. There, the opening angle of the hinge is entered on the horizontal right axis, starting with the opening angle 0 ° (closed position; Fig. 2) up to the opening angle 90 ° (fully open position; Fig. 4). The torque is shown in Nm on the vertical axis.

The curve 20 represents the curve of the torque that is generated by a stove flap with a weight of approximately 10 kg. This torque increases sinusoidally. It reaches its highest value at the full opening angle of 90 °.

Curve 21 shows the profile of the torque generated by the hinge when the hinge is opened. At the beginning of the opening process, this torque has a maximum of slightly more than 7.5 Nm at an opening angle of approximately 5 °. The very steep curve of the hinge torque up to this maximum is generated by the inclination of the initial section 16 of the curve 9 .

In the subsequent area, the hinge torque drops significantly. It reaches curve 20 in the range of approximately 17 °. With a further opening of the stove flap, the torque of the hinge generated by the spring force shown in curve 21 essentially corresponds to the opening torque of the stove flap shown in curve 20 . This can be achieved by appropriate shaping of section 19 of curve 9 .

When the stove flap is closed, the torque generated by the hinge passes through curve 22 , which is lower than curve 21 due to the hysteresis of the hinge. The curve 22 falls below the curve 20 at approximately 18 °, drops to approximately 0 Nm and exceeds the curve 20 again at approximately 13 °. The range from 18 ° to 13 ° corresponds to the grill stop, which assumes a stable position at the minimum of curve 22 , that is to say at approximately 17 °.

Optionally, the change of the control curves 21 , 22 also allows an influence such that the stove flap falls gently from an opening with a certain angle of, for example, 60 °. In this case, curve 21 intersects curve 20 at this angle of, for example, 60 ° and runs below curve 20 at larger angular positions.

By appropriate dimensioning of the hinge it can be achieved that the curves 21 and 22 , as shown in FIG. 6, run essentially at the same distance on both sides of the curve 20 . In a corresponding manner can be achieved by a different dimensioning of the hinge who can that the curves 21 and 22 are lowered or raised by loading.

In the lower part of the housing 1 , a recess 24 is provided on the side of the plug-in part 2 , which is penetrated by the plug-in part 2 and the tab 14 of the spring guide 3 . The roller 15 , which is provided on the tab 14 , is located in this way outside the housing 1st As a result, a large distance and thus a large lever arm h can be achieved between the axis 10 and the roller 15 . Due to this large lever arm, the compression spring 6 can be dimensioned relatively weak ver.

The force of the compression spring 6 is transmitted via the spring guide 3 to the roller 15. The roller 15 runs in the curve 9 of the plug-in part 2 . The shape of curve 9 allows adaptation to the door torque in any open position. The neutral section 18 adjoining the cam 17 enables an intermediate stop during the opening or closing process (“grill stop”).

The hinge is also suitable for cookers with very heavy doors. In particular for stoves with a device for pyrolysis cleaning, the doors or Flaps relatively heavy. They reach a weight of up to 14 kg.

The invention creates a hinge that manages with a small number of components. The hinge characteristic can be freely selected via the shape of curve 9 . Torque compensation can be generated in any open position of the door or stove flap. The arrangement can in particular be made such that the torque generated by the spring is essentially the same as the torque opening the door or flap. The hinge according to the invention is very small. By using a compression spring, which is less susceptible to vibration than a tension spring, no disturbing noises are generated. The pad or plastic pad 5 causes further damping of vibrations and noises.

The spring preload can be changeable. Because the spring force is proportional is low, the spring preload can be adjusted by hand. This can a hinge can be used for different cookers. The hinge is on ver different cookers adaptable or adjustable for different cookers.

In Figs. 7 to 9 show a modification of the hinge is shown, in which the further cam 4 'deeper, ie, closer to the roller 15, is present as in the form of execution according to Fig. 1 to 5. Furthermore, the further cam 4 'Ge continuously curved, in such a way that lever arm h niers with increasing opening of the crowd. The further curve 4 'is curved in such a way that the extent of the reduction in the lever arm h increases as the opening of the hinge increases.

In Figs. 7 to 9, for reasons of simplified drawing depicting lung the spring guide not shown. 3 Parts which correspond to those of the embodiment according to FIGS . 1 to 5 are provided with the same reference characters.

In the modification of FIGS. 7 to 9, a locking member 25 is connected with the pin 2. The locking part has a pivot axis 26 which is pivotably and longitudinally displaceably mounted in a guide 27 of the plug-in part 2 . The locking part 25 is pivotable about the pivot axis 26 . The pivot axis 26 is movable in the Füh tion 27 . The guide 27 is essentially straight.

The locking part 25 has at its end opposite the pivot axis 26 a wedge 28 which is formed from the lower, substantially circular arc-shaped contour 29 and the upper, also essentially circular-arcuate contour 30 and which tapers away from the pivot axis 26 . On the locking part 25 between the pivot axis 26 and the wedge 28, an upwardly facing latch 31 is also provided.

The housing 1 of the hinge is connected to the stove flap. The plug-in part 2 is suspended in a counter bearing 32 , which is attached to the stove. In the counter bearing 32 there are tabs 33 , into which an extension 34 of the plug part 2 engages. Furthermore, the counter bearing 32 has a tab 35 on which the rounded outer end 36 of the plug part 2 rests. Through the interaction of the tabs 33 with the extension 34 and the tab 35 with the end 36 it is achieved that the plug-in part 2 and the associated housing 1 of the hinge and the associated stove flap reliably by the weight of the stove flap in the in the Fig . 7 to 9 are kept position shown. However, it is possible for the plug-in part 2 to be moved out of the tabs 33 and 35 by pivoting the plug-in part 2 relative to the counter-bearing 32 in a clockwise direction. During this movement, the extension 34 is moved downward from the area between the tabs 33 , while the rounded outer end 36 moves past the tab 35 .

In Fig. 7 the locked position of the hinge is shown. A recessed support surface 37 is provided in the plug part 2 , the contour of which corresponds to the lower surface 29 of the locking part 25 . In the locked position, the locking part 25 rests with its lower surface 29 on the support surface 37 . The upper surface 30 of the locking part 25 lies at the corner 38 of the counter bearing 32 . The wedge 28 of the locking part 25 formed by the surfaces 29 , 30 is clamped between the support surface 37 and the corner 38 . The pivot axis 26 of the locking part 25 lies in the manner shown in FIG. 7 in the central region of the guide 27 , somewhat outside the center in the direction away from the axis 10 . In this position, the wedge 28 of the locking part 25 prevents the stove flap from being lifted out. In order to lift the stove flap, the housing 1 of the hinge would have to be turned clockwise, which is prevented by the wedge 28 between the support surface 37 and the corner 38 . The wedge 28 creates a self-locking feature that prevents the stove flap from being lifted out. The wedge 28 cannot come loose by itself. This prevents incorrect operation, which could otherwise result in the stove flap being accidentally removed by lifting it when the position is closed.

However, it is possible to open the stove flap, that is, to pivot the housing 1 about the axis 10 . After a slight pivoting, the partially open position shown in FIG. 8 is reached. If the stove flap is to be hung out, the stove flap is opened further until it reaches an opening angle which is somewhat larger than that shown in FIG. 9. In this open position, the locking member 25 is pivoted ver counterclockwise about the pivot axis 26 until it reaches the position shown in Fig. 9. In this position, the locking part 25 projects through the slot 24 into the housing 1 of the hinge. The locking lug 31 faces the axis 10 and the roller 15 . Subsequently, the stove flap and with it the housing 1 is pivoted somewhat toward the closed position until the locked position shown in FIG. 9 is reached. In this position, the tab 14 has reached the locking lug 31 (not shown in FIGS . 7 to 9). The outer end face of the locking part 25 lies against the edge 39 , which delimits the slot 24 at the top. A further closing of the hinge, ie a further pivoting of the hinge clockwise around the axis 10 , is prevented. If the stove flap is raised in this locked position, the plug-in part 2 is unhooked. The extension 34 of the plug part 2 slides down out of the tabs 33 and the stove flap can be removed.

It can then be attached again in a reverse movement. In order to release the locking of the locking part 25 , the stove flap is opened slightly further, so that the housing 1 is pivoted from the locked position shown in FIG. 9 about the axis 10 in the counterclockwise direction. In this position, the locking member 25 can be pivoted ver clockwise about the pivot axis 26 . The lock is thus released and the stove flap can be closed, so the housing 1 can be pivoted further clockwise about the axis 10 . When the stove flap closes, the closed region 40 of the housing 1 lying above the upper edge 39 of the slot 24 engages. The locking lug 31 bears against this closed area 40 above the edge 39 and is reliably brought into the locked position shown in FIG. 7 and held there.

The invention and its advantageous developments can create a hinge on the principle of double-acting, simple or superimposed control cams. The curve 9 causes by its course a stronger or weaker biasing of the spring 6 and thus a control of the hinge torque over the course of the opening angle. The curve 9 can also be designed double acting, in such a way that the slope of the curve can generate an increasing resistance or an additional torque and in this way it is possible in particular to increase the additional torque when closing or to create detent positions. The further curve 4 offers a further possibility of influencing the torque curve over the opening range of the stove flap by changing the lever arm h of the engaging force in relation to the pivot point 10 . In particular, by overlaid the two cam controls 9 and 4, the range of the torque influence can be expanded, so that the size of the hinge can be significantly reduced. The interaction of the two curves 9 and 4 makes it possible to achieve almost any desired hinge characteristics. In particular, it is possible, through the further curve 4, to reduce the effective lever arm h shortly before the end stop. It is possible to make the arrangement in such a way that the torque increasing via the opening movement decreases again.

It can be achieved that the stove flap from a desired opening win kel opens automatically.

Claims (17)

1. Hinge for a stove flap with a housing ( 1 ) on which a plug-in part ( 2 ) is pivotally mounted ( 10 ), characterized by a spring guide ( 3 ) loaded by a spring ( 6 ), which is provided with a roller ( 15 ) is, which is guided by a curve ( 9 ) of the plug part ( 2 ). 2. Hinge according to claim 1, characterized in that the spring ( 6 ) is a compression spring. 3. Hinge according to claim 1 or 2, characterized in that the roller ( 15 ) on an outwardly facing tab ( 14 ) of the spring guide ( 3 ) is seen easily. 4. Hinge according to one of the preceding claims, characterized in that the curve ( 9 ) in the closed position of the hinge has an inclination causing the required closing force ( 16 ). 5. Hinge according to one of the preceding claims, characterized in that the curve ( 9 ) has a neutral section ( 18 ) at a certain opening of the hinge from preferably about 20 ° before. 6. Hinge according to one of the preceding claims, characterized in that the curve ( 9 ) is designed such that the spring force generated due to the curve course compensates for the opening torque of the stove hatch in wesent union. 7. Hinge according to one of the preceding claims, characterized in that the spring guide ( 3 ) is guided in the housing ( 1 ). 8. Hinge according to claim 7, characterized in that the spring guide in the housing ( 1 ) through a support ( 5 ), preferably a plastic layer, is guided. 9. Hinge according to one of the preceding claims, characterized in that the lever arm (h) of the roller ( 15 ) relative to the pivot axis ( 10 ) of the plug-in part ( 2 ) is changeable. 10. Hinge according to one of the preceding claims, characterized in that the spring guide ( 3 ) has a guide pin ( 8 ) which is guided in a further curve ( 4 ) of the housing ( 1 ). 11. Hinge according to one of the preceding claims, characterized in that the bias of the spring ( 6 ) is variable. 12. Hinge according to one of the preceding claims, characterized in that a stop ( 12 ) for the spring ( 6 ) is adjustable, preferably by a nut. 13. Hinge according to one of the preceding claims, characterized in that a locking part ( 25 ) is connected to the plug-in part ( 2 ). 14. Hinge according to claim 13, characterized in that the locking part ( 25 ) is pivotable ( 26 ). 15. Hinge according to claim 14, characterized in that the Schwenkach se ( 26 ) of the locking part ( 25 ) is displaceable ( 27 ). 16. Hinge according to one of claims 13 to 15, characterized in that the locking part ( 25 ) has a wedge ( 28 ). 17. Hinge according to one of claims 13 to 16, characterized in that the locking part ( 25 ) has a latching lug ( 31 ).