DE2457789A1 - BRAKE DEVICE FOR MULTIPLE PRESSES - Google Patents

Description

Brake device for garbage compactors.

The invention relates to household trash compactors which have found wide use. Such presses included usually a housing with a front opening, a door to the Closing the opening, an open-topped container which can be moved into and out of the housing, and a Pressing or compressing mechanism that is mounted in the housing. and which can be moved into the open-topped container, to compress the trash inside. Many presses or compactors currently on the market have a scissor-like hinge arrangement to exert force on the pressure plate. Devices of this type are inherent in one

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from existing disadvantage, as the mechanical benefit of the hinge assembly changes as a function of the position of the pressure plate over the length of the compression stroke. A typical press of this type is described in U.S. Patent 3,714,890.

There are also other presses known in which a screw-type Driving device is used to generate a pressing force that is generally constant and independent of position the pressure plate is. Two such compactors are described in U.S. Patents 3,727,546 and 3,741,108. Such presses however, have a number of disadvantages. One disadvantage is that the screw drive itself after turning back can clamp and block in its uppermost position, so that the motor drives the screw at the beginning of a the subsequent pressing process cannot break loose.

The problem that the screw drive is blocked occurs because during normal operation, when the pressure plate approaches its retracted or uppermost position, a limit switch turns off power to the engine. if however, the operator keeps the power switch on beyond the operating point of the limit switch, then moves it the screw mechanism continues to be driven back and blocked in its uppermost position. In a corresponding way After a certain amount of pressure, the motor could coast down after being switched off by the limit switch, which also resulted in a blockage of the screw drive was caused.

The use of a needle thrust bearing between the screw drive and the frame of the press proved only partially effective in solving the jamming problem. The friction between the frame and screw drive were diminished; thus the motor could release the tensioned or blocked drive at the beginning a subsequent press cycle. However, the needle thrust bearing did not have a braking effect and as a result the attack the retracting screw drive device on the frame with such a force that either the drive

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device or the power transmission from the motor to the drive device was damaged.

Furthermore, in US Pat. Nos. 3,783,312 and 2,172,440 attempts are made to develop a braking device for braking electrically To create engines under idle conditions, but such braking devices are in no way suitable for use in household garbage presses.

An object of the invention is therefore to provide an uncomplicated, inexpensive, simply structured and easy to maintain device for slowing the screw drive to a stop when the pressure plate is used reached their highest position, and still only a minor one or presents no resistance at all to the motor when the next subsequent cycle begins.

According to the present invention, a press brake is created, those in presses with screw drive between the drive device and the frame is used to stop the upward movement of the pressure plate and for easy reversal to be taken care of when the next subsequent pressing cycle is started. More specifically, a household garbage compactor comes with one Frame created that has a pressing chamber with an access opening thereto, a door that allows movement between ijffnungs- and

Closing positions for the access opening are appropriate »; Means of support an open-topped container in the chamber, a pressure plate for movement into and out of the container, around the inside to compress the garbage located, a screw-like drive device that extends through the frame for a vertical reciprocating pressure plate is supported with a screw device, means for fastening the plate on the screw device and comprises rotatable drive means for driving the screwing device. The garbage compactor is indicated by a Braking device which is rotatably mounted in abutting engagement with the frame and the drive device and which is

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can rotate over an arc in order to come into engagement with stop means mounted on the frame in order to reduce the rotational movement of the To stop the drive device releasably.

The garbage compactor according to the invention is in particular the The advantage achieved is that the screw-like drive device of a household garbage compactor is damaged when it is returned the rubbish press pressure plate is prevented in its uppermost or rest position.

The invention will now be based on further features and advantages the following description and the drawing of an exemplary embodiment explained in more detail.

Figure 1 is a side elevational view, partially in section, of the pressing mechanism of a household press incorporating the Press brake used according to the invention, the press mechanism shown in its uppermost position is.

FIG. 2 is a top view of that shown in FIG Press brake.

The pressing mechanism 20 shown in FIG. 1 comprises, as main components, a pressure plate 54, a screw-like drive device 56 for a vertical to-and-fro movement of the pressure plate 54 and stabilizing means 58, which between the plate 54 and the top wall 30 are arranged to support the plate 54 during a downward movement towards and into a garbage receiving area Hold container 18 therein generally horizontally.

The pressure plate 54 can be of any suitable construction and is conveniently comprised of a generally circular one Plate 60 sized to be received in container 18. The plate 60 forms a pair of ribs 62 on its underside in order to to provide increased strength and to act as a bottle breaker.

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The screw-like drive device 56 for a reciprocating movement The pressure plate 54 includes a screw 64, the lower end of which is in any suitable manner in a bearing element is attached. The bearing member 66 is attached to the plate 60 by a substantially hemispherical cup 70, in FIG an opening 72 for receiving the screw end is provided is. The cup 70 is attached to the pressure plate 54 in any suitable manner, which can be done, for example, by threaded elements 74. It can therefore be seen that the Pressure plate 54 is mounted for pivotal movement relative to the screw about a plurality of horizontal axes.

The upper end of the screw 64 is received in an integrally threaded bushing 76 which is on a substantially spherical bearing element 78 is attached. A multitude von.Antriebsstifte 80 protrudes in the radial direction from the bearing element 78 into an equal plurality of drive slots 82 which are formed by a sleeve 84. The sleeve 84 forms a Inner seat 86 which matches the exterior of the bearing element 78. A retainer 88 is releasably attached to the open bottom end of the sleeve 84 in any suitable manner, for example can be done by a screw connection, not shown, in order to capture the bearing element 78.

Accordingly, it can be seen that rotation of the sleeve 84 causes rotation of the sleeve 76 through the drive connection, the formed by the pins 80 and the slots 82 to thereby move the screw 64 back and forth. It can also be seen that the screw 64 can perform a limited pivoting or tilting movement relative to the sleeve 84 due to the sliding relation of the bearing 78 with the inner seat 86 and the vertical extent of the slots 82.

The sleeve 84 forms an outer upwardly directed shoulder 90, which includes a needle or roller bearing 92 against a generally horizontal flange 94 which in turn against the Plate 96 of the upper reaction structure 40 abuts. As in the fol-

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will be explained in more detail, the plate 96 acts to transmit forces generated during pressing on the Top wall 30 and from there onto the frame 14. The flange 94 carries a tubular bearing section 98, which extends through the plate 96 passes through and is flush with the wall 30. On the Wall 30 and the tubular bearing section 98, a bearing device 100 is arranged on which the braking device 101 according to the present invention rests.

As can be clearly seen from Figure 2, the braking device contains 101 projections 103 which extend from their outer circumference in the radial direction. These projections 103 are dimensioned so that they extend over a sufficient length so that when the braking device rotates on rods or small Attack posts 105 which are firmly attached to the top wall 30. As can be seen from Figure 2, the posts are 105 attached at preselected locations on the plate 96 and protrude through the top wall 30 through to the protrusions 103 to engage the braking device and to allow the braking device to rotate through an angular rotation of, for example Rotates 70 °.

A sleeve or a ring 102, which is driven by an external power source (not shown) and is mounted on the bushing 84, rests on the braking device 101. It becomes clear that the ring 102 and sleeve 84 are mounted for rotation about an axis 108 defined by the guide body 76. The ring 102 is internally splined for a drive connection with the socket 84 to ensure. Furthermore, the ring 102 is externally serrated in order for a drive connection with a large, toothed wheel (not shown) and it is connected to the socket 84 by a suitable retaining element 106.

In operation, the braking mechanism according to the invention has the effect of to limit the rotation of the bushing 102 if there is a tension in the device 56 during a backward movement of the plate occurs in its highest position. In particular, it can be seen

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that moving the screw device back to its uppermost position causes the upper and lower reaction structures 40 and 38 abut one another, which in turn causes a turning force on the bearing element 78 and then on the Ring or the socket 102 is transmitted, which is still below is described in more detail. The reason for such a pressing or tightening can either be that the surgeon is the Keeps start button in a depressed state when the pressing mechanism moves back, or that the engine is in a final Rest position expires. Such a tightening has previously caused the retaining element 106 or the upper part to break the bush 84 breaks off. By adding the braking device on the other hand, such a phenomenon is prevented.

As already stated, the braking device 101 serves to limit the rotation of the sleeve 102 and thus to inhibit the Upward movement of the circular plate 60 and the lower reaction structure 38. Such a limitation is prevented in the following How to block the device 56 when the plate and reaction structure are in their uppermost position: When the lower reaction structure 38 abuts the upper reaction structure 40, each further rotation of the bushing 76 has the Tendency to pull the reaction structures even closer together. The screw 64 pulls on the hemispherical cup 70 and the in turn pulls the bushing 76 downwards onto the spherical bearing element 78, which in turn is attached to the holding element 88 and thus pulls down on socket .84. Such a downward force exerts pressure on the holding element 106.

As has already been stated, when the lower reaction structure strikes the upper reaction structure with force, the force transmitted to the holding part 106 can be sufficient for it to break. Alternatively, the upper part of the bushing 84 carrying the holding part 106 can break off. In order to prevent such a consequence, the braking device 101 is inserted on the upper side of the braking means 100 in an abutting relation to the bushing 102. In the circumstances described above,

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when downward thrust is applied via the bushing 84, the rotating bushing 102 forcibly engages the braking device 101 and thus exerts a rotating force on the braking device 101. When this happens is the
Braking device 101 is forcefully compressed between the bearing means 100 and the bushing 102 until it begins to rotate with the bushing. The braking device 101 rotates through an angle of, for example, 70 ° until the front edges 107 of the projections 103 with the uprights or posts 105 in contact
which are attached to the plate 96 and protrude through the top wall 30. At this point, further rotation of the braking device 101 is prevented. The attraction between
the bush 102 and the bearing 100 is continuously enlarged. Thus, the frictional forces between the bushing 102 and 102 reach
of the braking device 101 quickly a sufficient size to
to stop rotation of the sleeve 102. It becomes clear that
the braking function of the braking device 101 forms a gradually increasing braking effect which prevents the moving parts of the device 56 from stopping abruptly. In addition, it can be seen in a simple manner that at the beginning of a subsequent pressing cycle the bush 102 is in the opposite direction
Direction turns. Thus, the braking device 101, which is now firmly in engagement with the bushing 102, is free to rotate over an arc of, for example, 70 °. After a turn
over this arc of 70 °, the tightening force between the bushing 102 and the braking device 101 has increased in such a way
The extent to which, when the following edges 109 of the projections 103 abut against corresponding posts 105, the bush 102 is easily rotatable with only slight frictional contact with
of the braking device 101. Thus, the braking device 101 provides
for a braking of the device 56 and for a slight release or "breaking ^{loose" 1} · at the beginning of the next pressing cycle.

It should be noted that the braking device 101
has been shown and described with three projections that abut against corresponding posts, but that also other similar ones

under
Braking means could be provided. For example, Vgewissen

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Under certain circumstances, a suitable braking device with only one projection can be used against only one post or stand bumps into. The braking device would then over an arc of less than approximately 360 ° when performing the braking function turned. Similarly, a braking device could have a plurality of projections and uprights and posts be used. In such a case, the rotation of the Brake device over an arc of 30 ° or less the implementation of the braking function. Furthermore, the braking device does not need to have any specific shape, as long as care is taken that it releasably engages a stop in order to bring about the braking.

It also becomes clear that when a needle roller bearing is used as a bearing device 100 is used, the braking device 101, which is in contact therewith on its underside, is even lighter breaking loose would be at the beginning of a subsequent compaction cycle. Such a bearing also minimizes the frictional forces that the motor has to overcome in order to move the bushing 102 break loose and begin the compaction cycle.

Another feature of the compactor described here or the The press is shown in Figure 1 where the bottom of the bushing 76 is positioned well below the top wall 30 at a location where the Pressure plate 54 the container 18 at the end of the upward movement of the Screw 64 releases. Thus, the length of stroke of the screw 64 is measured from a location adjacent the bottom of the sleeve 76, rather than from the top wall 30. Since about half of the screw 64 is below the bottom wall 30 of the press in the uppermost position the screw 64 is located, it can be seen in a simple manner that the overall height of the press has been significantly reduced. Thus, the press can also be arranged under a conventional sink, since the screw 64 over the top of the press with protrudes at most about half its total length.

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It should be noted that the visual hood is directly connected to the Pressure plate 54 is connected and not via a hinge or Lifting mechanism. Thus, the resistance to movement encountered against the screw 64 is due to the resistance of compacting garbage and not a mechanical disadvantage or loss that occurs in a hinge assembly. As a result, will the full output power of the motor (not shown), apart from any frictional losses, is supplied to the pressure plate 54, in all vertical positions of the screw 64. Thus, the pressing force supplied by the pressing device 20 is relatively constant and independent of the vertical position of the press plate. Furthermore, there is the essential advantage that the Device 58 for keeping the pressure plate 54 horizontal during its downward movement, completely independent of the screw 64 and the socket 76 is.

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Claims (3)

■■■■: - :. m. - 11 claims 1. Household garbage compactor with a frame that has a pressing chamber with .an access opening, a door that allows for movement is attached between the open and closed position for the access opening, means for holding a top open container in the chamber, a pressure plate for movement in and out of the container around the to compress the garbage in it, a screw-like drive device, which is supported by the frame for a vertical Reciprocating movement of the pressure plate is supported, means for fastening the plate on the screwing device and rotatable drive means for driving the screwing device, characterized in that the braking device (101) is in impact engagement with the frame (14) and the drive device is rotatably mounted and is rotatable through an arc at a tightening force between the frame and the drive device in order to come into engagement with stop means (105) such that the rotational movement the drive device is releasably stopped. 2. Garbage compactor according to claim 1, characterized that the rotation of the braking device (101) is limited to an angular rotation of less than 360 °. 3. Garbage compactor according to claim 1, characterized in that the braking device (iOl) is a rotatable is flat disc (60) and the frame comprises bearing means which are in contact with the braking device. k. Garbage compactor according to claim 3, characterized in that the braking device (101) has attachment parts (103) which extend from the flat disc (60) in the radial direction in order to come into engagement with the stop means (105). 503845/0285 Garbage compactor according to claim 4, characterized in that the stop means have a plurality of Uprights or posts (105) which can be gripped by the lugs (103) upon rotation. 5C0345 / 0 285