BRPI1102125A2 - motor mounting, in particular for a cooking appliance - Google Patents

Abstract

ENGINE FIXATION, IN PARTICULAR, FOR A COOKING APPLIANCE. The present invention relates to a motor retaining plate (50) for placing an electric motor, in particular, in a cooking appliance equipped with at least one retaining clip (52), which is arranged in one side of the motor retaining plate (50) and has a fitting section (58), and a fastening clip (70), which is arranged on a second side of the motor retaining plate (50). According to the invention there is also a construction group containing a wall (12) of a cooking appliance, a support (30) and a motor retaining plate (50) of that type, the support (30) having a bottom (32), for the support of the retaining clip (52), as well as, a lateral slot (60), through which the locking section (58) extends. Finally, according to the invention, a process is provided for mounting an engine retaining plate (50) on a wall (12) of a cooking appliance, by means of the following steps: an engine retaining plate (50) ) with at least one retaining clip (52), which is equipped with a locking section (58), is arranged on a support (30), which is provided with a slot (60). Then, the plug-in section (58) is pushed through the slot (60) and at least one fixing clip (70), which is provided on the motor retaining plate (50), is placed on the support (30).

Description

Patent Descriptive Report for "ENGINE FIXING IN PARTICULAR FOR A COOKING APPLIANCE".

The present invention relates to an engine retention plate for the attachment of an electric motor, in particular to a cooking appliance. The invention furthermore relates to a construction group with a wall of a cooking appliance, a holder and an engine retaining plate of this type. Finally the invention relates to a process for mounting an engine retaining plate on a wall of a cooking appliance.

For fixing an electric motor many different solutions are known. One solution is to secure the engine to an engine retaining plate, which has several mounting arms, which are provided with an opening respectively at its end. The fixing arms with their openings are seated on threaded pins, on which the nuts are then bolted. In this case, the high expenditure on fixing is disadvantageous as many screws need to be tightened. In addition, the many clamping arms represent heat bridges, which in particular then is disadvantageous if the electric motor is attached to the inner housing of a cooking appliance. The high temperatures that may occur inside the inner box during operation of the cooking appliance must be kept as far away from the electric motor as possible.

Therefore, the task of the invention is therefore to create a simple, inexpensive and reliable fixation of an electric motor, whereby a faster and qualitatively better assembly to date is possible.

To solve this task, according to the invention, there is provided a motor retaining plate for fixing an electric motor, in particular in a cooking appliance with at least one retaining stud. which is arranged on one side of the engine retaining plate and has a locking section and a retaining clip which is arranged on a second side of the engine retaining plate. The invention is based on the recognition that at least part of the pins, bolts and nuts employed so far can be replaced by a retaining clip equipped with a locking section. The locking section, for example, can be pushed into a slot in a bracket, whereby a mechanically reliable fixation of the motor retaining plate is provided.

Preferably, two paired retaining clips are provided on one side of the motor retaining plate, and two pairing retaining clips are provided on the opposite side of the motor retaining plate. This ensures a stable clamping of the motor retaining plate, in particular in the case of tipping forces and torsion moments, which are introduced via the motor retaining plate.

According to a preferred embodiment of the invention it is provided that the retaining clip is provided with a curved support section which is between the engaging section and the motor retaining plate. During mounting, the support section can touch a support, and thus serves for precise positioning of the motor retaining plate.

Between the mating section and the bearing section there may be provided a spring section which extends essentially parallel to the plane of the motor retaining plate. The spring section makes it possible to tighten the motor retaining plate and, in particular, the retaining clip relative to the bracket, so that vibration-free attachment is ensured.

Preferably, it is provided that the locking section is curved relative to the plane of the spring section. This ensures that the locking section is deposited by the spring section, whereby a precise contact corner defined from the locking section within a bracket slot is defined.

According to the preferred embodiment of the invention, the engine retaining plate is provided with a groove extending from the engine retaining plate to the retaining clip, in particular, to the bearing section. The spline increases the flexural strength of the motor retaining plate in the area of the retaining clip passageway such that eventually applied bending moments need to be received by the spring section, while the backing section does not deform. motor retention plate.

According to one embodiment of the invention it is provided that the securing clip is likewise made with a locking section. In the case of this variant, with respect to their execution, the securing clamps correspond to the retaining clamps, so that no bolts are required for fixing the motor retaining plate.

According to an alternative embodiment it is provided that the securing clip has an opening for receiving a threaded pin. In the case of this variant, the motor retaining plate fastening is divided into a screwless fastening, ie by means of the retaining clips, and a screwing, that is, into the retaining clips. In the case of this variant, in total fewer screws are required for fixing than in the prior art, so that a lower mounting expense results.

For the solution of the above mentioned task, a construction group is also provided containing a wall of a cooking appliance, a bracket and an engine retention plate of the type described above, the bracket having a bottom to support the retaining clip as well as a side slot through which the locking section extends. Although the motor retaining plate can be mounted with small expenditure on the bracket, very precise alignment of the motor retaining plate and thus the electric motor is ensured as the bracket serves as a reference plane.

Preferably, it is provided that the locking section is curved relative to the plane of the motor retaining plate. This configuration additionally employs friction locking, which is obtained by tightening the retaining clip in the bracket slot, plus a shape locking connection, whereby the locking section is bent such that so that it can no longer be retracted by the clip.

The above mentioned task is also solved by a process for mounting a motor retaining plate on a wall of a cooking appliance, firstly a motor retaining plate with at least , a retaining clip, which is equipped with a locking section, is disposed in a support, which is provided with a slot. Then the locking section is pushed through the slot and at least one retaining clip, which is provided on the motor retaining plate, is fixed to the bracket. With this process, the motor retaining plate can be fixed to the bracket at very small expense, precisely and yet inexpensively.

According to one embodiment of the invention it is provided that the motor retaining plate is rotated relative to the bracket such that the locking section is pushed through the slot. The rotational movement with which the locking section is pushed through the slot in the bracket during assembly can be performed by hand such that a very simple assembly process results. Additionally, this rotational movement can be guided and thereby supported, for example, by pins, which are provided in the bracket.

According to an alternative embodiment it is provided that the motor retaining plate is first pushed laterally such that the locking section is pushed through the slot and then it is rotated around the retaining clip. against the bracket until the retaining clip touches the bracket. In such a configuration, the engine retaining plate may be employed as a lever arm to tighten the retaining clip on the bracket. Therefore no tools are required to tighten the vibration-safe motor retaining plate.

In the following, the invention will be described with the aid of various embodiments, which are shown in the accompanying drawings. In this case, there are shown: - Figure 1 in a perspective view, an internal housing of a cooking appliance, with a motor retaining plate attached thereto, according to a first embodiment;

- in Fig. 2 in an enlarged view, the retaining plate of the engine of Fig. 1, in a second intermediate position during its assembly;

Figure 3 in an enlarged perspective view shows the lower half of the engine retention plate shown in Figure 1;

- in figure 4 the inner box of figure 1 in a side view;

in figure 5 the detail V of figure 4 in larger scale;

6 is a perspective view of an internal housing of a cooking apparatus with a motor retaining plate according to a second embodiment;

Figure 7 schematically in an enlarged view, the motor retaining plate of Figure 6 in an intermediate position during its assembly; and

- in figure 8 in a view corresponding to that of figure 7, the motor retaining plate after assembly is completed.

Figure 1 shows the inner box 5 of a cooking appliance. In the case of the cooking appliance this is a professional appliance for industrial kitchens in particular, a so-called combined pressure appliance. Inner box 5 has a bottom 10, a wall 12 and a lid 14. Wall 12 connects bottom 10 with lid 14, and extends (apart from an access opening 7 defining the right side). - the front of the appliance to the cooking compartment of the cooking appliance) around the entire circumference of the inner housing 5. The bottom 10, the wall 12 and the lid 14 are respectively made of metal and together surround the cooking compartment. Baking

Bottom 10 and lid 14 are provided, respectively, with an edge 16 or 18, which protrudes outwardly through wall 12, so that, seen from the cooking compartment, extends further than wall 12. At each edge 16, 18 are formed several openings 20, which may be, for example, embossed.

Several pins 22 are welded to the wall 12 (see, in particular, Figures 4 and 5), each pin having a groove 24, and at its end is equipped with a thread.

In the openings 20, the edges 16, 18 of the bottom 10 and the lid 14, in total two supports 30 are suspended. Each support has a U-shaped cross-section, with a bottom part 32, and two side flaps 34. As a material for the supports 30 is particularly suitable sheet which is stamped with little expense and can be folded into the desired shape. For stabilization of the side flaps 34, their edge is performed with a double layer spaced from the bottom 32.

At the bottom 32 of each support 30 are provided two oval holes 36 which at the lower end are provided with a circular shaped flare. Each oval hole thus has a keyhole-like shape. Hooks 40 and 42 are provided at the upper end and lower end of each bracket, which are provided for hooking into the openings 20 at the edge 16 of the bottom 10, and at the edge 18 of the lid 14. As can be seen in particular, 4, the hooks 40, 42 are laterally separated from the support, and indeed on the side behind the bottom 32, viewed from the side tabs 34. In this case, the hooks 40, 42 are attached respectively in a laterally curved connecting portion 44 which is formed in extensions of the side flaps 34.

Both hooks 40, 42 are made in pin form and extend in the same direction. Referring to the exemplary embodiment shown in Figures 1 to 5, the two hooks 40, 42 extend downwards. The hooks 40 at the upper end of the bracket 30, therefore, are directed towards the center of the bracket 30, while the hooks 42 at the lower end are spaced from the bracket 30.

The supports 30 are suspended in the inner box of the cooking appliance by a simple sliding movement. For ease of assembly, in this case the oval holes 36 and the hooks 40, 42 are at different levels from one another. In a first step, the brackets 30 are arranged over the pins 22 such that the head of each pin 22 extends through the circular shaped flare at the lower end of the oval hole 36. In that state, the hooks 40 42 are still spaced by the edges 16, 18 from the bottom or the lid 14. Then the brackets are moved downwards, whereby the slot 24 of the pins 22 slides into the narrowest section of the oval holes 36. Thus , the pins are retained in a direction perpendicular to the plane of the bottom part 32 of the brackets 30. Then the upper hooks 40 are placed in the corresponding openings 20 at the edge 8 of the lid 14. In this case, a force may be applied to the bracket 30. whereby the wall 12 is tightened with respect to the lid 14. Then the corresponding bracket is moved lower, until also the lower hooks 42 can be placed in the corresponding opening 20. Also in this case, a pre-tensioning force may be applied in a direction perpendicular to the plane of the wall 12. Finally the support is moved further down until the lower connecting portion 44 abuts the lower edge 16. The support is then held in the vertical direction. By properly sizing and positioning the openings 20, pins 22, and brackets 30 relative to each other, it is ensured that the wall 12 is tightened to the desired shape so that no beat noises and vibrations.

The two brackets 30 serve as supports for a motor retaining plate 50 to which a fan motor may be attached. The engine retaining plate 50 is made of sheet metal having a generally rectangular shape and is in all equipped with four tabs which are arranged at opposite edges of the engine retaining plate 50 which are opposite each other. , and are for securing the engine retaining plate 50 to the two brackets 30. At the lower end of the engine retaining plate 50 relative to the figures, two retaining clips 52 are formed, which are comprised of a section of U-shaped support 54 in cross section (see Figure 5), a spring section 56, and a locking section 58.

The bearing section 54 is provided to be able to contact the bottom 32 of the bearing 30. The spring section 56 which connects to the bearing section 54 extends in the assembled state of the motor retaining plate 50. exactly parallel to the plane of the motor retaining plate 50, but slightly upwards. The locking section 58 is intended to be pushed into a slot 60 (see in particular Figure 5) which is formed in a side flap 34 of the brackets 30. In this case the locking section 58 is bent relative to the spring section 56 such that it is further away from the bottom part 32 of the corresponding bracket than the spring section 56. As can be seen in particular in Figure 2, the locking section 58 is provided with a hook-shaped fleece clip 64, which is laterally separated from the locking section 58. For stabilization of the passage of the motor retaining plate 50 to the retaining clips 52, respectively, is provided. a groove 62 extending from the surface of the motor retaining plate 50 to approximately the bottom of the bearing section 54 (see in particular figure 3).

On the side of the motor retaining plate 50, opposite the retaining clips 52 there are provided two retaining clips 70, one of which is provided with a circular shaped hole 72, and the other is provided with an oval hole 74, which is widened at one end in a circular shape. The two retaining clips 70 are bent from the motor retaining plate 50 such that they are approximately in the same plane as the two support sections 54 of the retaining clips 52.

For mounting the motor retaining plate 50, this plate is fixed to the two brackets 30 such that both retaining clips 52 and the two retaining clips 70 are within the channel formed by the portion. 32 and by the two side flaps 34 of each bracket 30. The hole 72 of one of the securing clips 70 is seated on one of the pins 22, in this case the left of the two pins, such that this pin serve as a pivot point for the engine retaining plate 50. The pin 22 of the right bracket 30 extends in this state approximately in the center through the circular widening at the lower end of the oval bore 74 of the second retaining clip. 70. The motor retaining plate 50 is then rotated around the pin 22 which acts as the pivot point in the direction of the arrow P of figure 2, whereby the two locking sections 58 are pushed through the slots 60 to the side flaps 34 (see the shown in figure 1).

In order to be able to engage locking section 58 through slot 60 during rotation of the motor retaining plate 50, a slight pressure is exerted with the fingers in the direction of arrow D of Figure 5 on spring section 56, so that the locking section 58 can get closer to the bottom 32 of the corresponding bracket 30. When the locking section 58 has been pushed sufficiently through the slot 60, the flexure clip 64 is on the outside of the corresponding holder so that it can be easily bent with pliers. In this way the retaining clips 52 can be secured against accidental slipping out of slot 60. In order to complete the mounting, nuts 22 are screwed onto the studs respectively (see Figure 1), such that the securing tabs are fixed to the brackets 30.

By tensioning the retaining clips 52, the motor retaining plate 50 is secured to the two supports 30 without vibration. Mounting can be done with a few taps and only two nuts are required to screw motor retaining plate 50. In this case brackets 30 provide a precise, defined reference plane through which the Motor retention plate 50 can be aligned exactly vertical. Since there are only few heat transfer points between the brackets 30 and the motor retaining plate 50, only little heat is transmitted from the inner housing 5 to the motor retaining plate 50 and, in particular, to the fixed motor. in her.

By deviating from the steps described for mounting the motor retaining plate 50 to the brackets 30 and thereby to the inner housing 5 of the cooking appliance, it may alternatively be provided that the motor retaining plate 50 is to be secured first. slightly inclined on the brackets so that only the retaining clips 52 come into the channel formed by the bottom 32 and the side flaps 34. Then the locking sections 58 are pushed through the slots 60 for the two brackets, which is possible without problems, as the slightly inclined alignment of the motor retaining plate 50 compensates for the inclined travel of the spring section 56 relative to the plane of the retaining plate of the motor. If the two engaging sections 58 are pushed correctly through the slots 60, the upper end of the motor retaining plate 50 is pressed against the brackets until the retaining clips also 70 abut the bottom 32, and a nut can be screwed onto the pin 22. While compressing the motor retaining plate 50 into the brackets, the bearing sections 54 act as turning points, and the retaining clips 52 are tightened elastic in the support due to the rotating movement.

In figures 6 to 8 a second embodiment is shown. For the known components of the first embodiment the same reference numerals are employed, and in this regard reference is made to the above explanations. The essential difference between the first and second forms of

This is because, in the case of the second embodiment, the securing clips 70 are also equipped with a socket section 58, and a flexing clip 64 attached thereto. In addition, each clip is provided with a guide slot 80, which extends concentrically from the center point of the motor retaining plate 50, and the end, which is closest to the locking section 58, is provided with a circular widening.

In a first assembly step, the motor retaining plate 50 is arranged on the two brackets 30 which serve as the support such that the two retaining clips 52 and the two retaining clips 70 will be in the channel formed by the bottom 32 and the two side flaps 34. In this case, the end of each guide slot 80, provided with the circular widening, is fitted to one of the pins 22. In the case of this embodiment not only are employed the upper two pins 22 but also the lower two pins 22, which in the first embodiment are covered behind the motor retaining plate 50 (see figure 4), and are only used there for wall mounting 12 From the state shown in Figure 7, the motor retaining plate 50 is rotated in the direction of arrow P, whereby the locking sections 58 with flexing tabs 64 are pushed through the slots 60 to the side flaps 34 of the brackets. 30, and the clips 52 and the retaining clips 70 are displaced such that the pins abut the end of the guide slots 80. In conclusion, the flexing clips 64 are easily bent, for example with pliers, such that the motor retaining plate 50 is secured to the brackets 30 with locking due to the shape. For increased vibration safety it may be envisaged that the locking sections 58 will be made slightly curved such that during insertion through the slots they tighten slightly on the side flaps 34.

REFERENCE LIST

inner housing 7 bottom access opening 12 wall 14 cover 16 edge 18 edge opening 22 pin 24 support slot 32 bottom part 34 side flap 36 oval hole 40 hook 42 hook 44 connecting part 50 motor retaining plate 52 retaining clip 54 support section 56 spring section 58 insert section 60 slot 62 groove 64 flexure tab 70 securing clip 72 hole 74 oval hole 80 guide slot

Claims (13)

1. Motor retaining plate (50) for placing an electric motor, in particular in a cooking appliance with at least one retaining clip (52), which is arranged on one side of the motor retainer (50) and has a locking section (58) and a retaining tab (70) which is disposed on a second side of the motor retaining plate (50). Motor retaining plate according to Claim 1, characterized in that two paired retaining clips (52) are provided on one side of the motor retaining plate (50) and two retaining clips. (70) arranged in pairs are provided on the opposite side of the motor retaining plate (50). Motor retaining plate according to either of claims 1 or 2, characterized in that the retaining clip (52) is provided with a curved support section (54) which lies between the retaining section. (58) and the motor retaining plate (50). Motor retaining plate according to Claim 3, characterized in that a spring section (56) extends between the locking section (58) and the bearing section (54). parallel to the plane of the motor retaining plate (50). Motor retaining plate according to Claim 4, characterized in that the locking section (58) is bent with respect to the plane of the spring section (56). Motor retaining plate according to any one of Claims 1 to 5, characterized in that a groove (62) is provided extending from the motor retaining plate (50) to the retaining clip ( 52) in particular to the support section (54). Motor retaining plate according to any one of claims 1 to 6, characterized in that the retaining clip (70) is likewise made with a locking section (58). Motor retaining plate according to any one of claims 1 to 6, characterized in that the retaining clip (70) has an opening for receiving a pin (22). Construction group containing a wall (12) of a cooking appliance, a holder (30) and a motor retaining plate (50) as defined in any one of the preceding claims, characterized in that the The support (30) has a bottom (32) for supporting the retaining clip (52) as well as a side slot (60) through which the locking section (58) extends. Construction group according to Claim 9, characterized in that the locking section (58) is curved relative to the plane of the motor retaining plate (50). Process for mounting an engine retaining plate (50) to a wall (12) of a cooking appliance, with the following steps: - an engine retaining plate (50) of at least a retaining clip (52), which is equipped with a locking section (58), is disposed in a support (30), which is provided with a slot (60); - the locking section (58) is pushed through the slot (60) and at least one retaining clip (70), which is provided on the motor retaining plate (50), is placed in the bracket (30). Process according to Claim 11, characterized in that the motor retaining plate (50) is rotated relative to the support (30) such that the locking section (58) is pushed through it. through the slot (60). Process according to Claim 11, characterized in that the motor retaining plate (50) is pushed first laterally such that the locking section (58) is pushed through. of the slot (60), and by the fact that it is then rotated around the retaining clip (52) against the bracket (30) until the retaining clip (70) abuts the bracket (30).