DE20108315U1 - Tabletop height adjustment - Google Patents

Description

Description

Table top height adjustment

A geometrically shaped tube made of various materials (preferably aluminum) is driven by a motor via a spindle to drive a runner. This runner can be located inside or outside the tube. Table tops or other items can be changed in position using this runner. Monocolumns or columns of the number &eegr; can be connected to one another. These can then preferably run synchronously.

Advantage over known systems:

Regardless of the length of the tubes, the rotor can travel strokes that are independent of the motor installation length.

Functional description;

Image 1

The tube 1 of any shape contains a drive 2 which is connected to the tube 1 and by which a spindle 3 is driven in rotation.

The rotating spindle 3 penetrates a nut 5, which has a corresponding internal thread. This nut 5 is mounted in the tube 1 in a rotationally secure manner due to its shape.

At least one point in the nut 5 there is a connection 6 (screw, bolt ...) with a so-called runner 4. This connection ensures that a displacement of the nut 5 also moves the runner 4.

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The runner 4 can be guided lengthwise in the tube 1 by means of a special shape (dovetail guide, etc.). In the case of monocolumns, this can produce a stabilization of the components attached to the guide 4.

Figure 1 also shows that the rotor(s) 4 can also run covered within an extended tube 1 (extra chamber 13).

To enable the connection of nut 5 to the rotor 4 via connection 6, an opening 7 is made lengthwise in the tube 1. - This is at least as long as the travel of the spindle and nut allows.

The left and right representations in Figure 1 only differ in the arrangement of drive 2. On the left, the drive is at the bottom, on the right at the top. This can be useful because it allows the cable routing of motor 2 to be selected upwards or downwards.

In the single column/mono column version, the pipe 1 is connected to a suitable base plate 8. Or the pipe 1 is statically held at the lower and upper ends. This is possible if the pipe length 1 extends, for example, between the floor and ceiling and is connected.

When using two or more columns 1, these are connected to each other in a suitable manner. This can be done via the tubes 1 at the bottom or top or via a static connection of the corresponding runners 4.

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To ensure that the nut 5 does not cause any dynamic damage when running quickly towards the motor 2 or towards the spindle end 9, the nut ends 5a to 5b are designed by their shape or the softness of the material in such a way that this property reduces the run-up forces by extending the run-out path in a spring-like manner. Alternatively, springs of any design can also perform this task.

This can also be solved by an electronic path/stroke measurement, so that the elastic ends of the nut are superfluous or supplemented. The drive is then stopped electronically before the end positions are reached.

picture 2

The design in Figure 2 is essentially the same as that in Figure 1.

Only here the drive 2 takes over the movement of the rotor 4 directly via the connection 6. The spindle 3 makes a relative movement through its rotation through the nut 10, which is firmly connected to the tube 1.

The nut 10 has the same elastic properties at the top 10a and bottom 10b as described in Figure 1. (Softness or springs of any design/shape)

The left and right representations in Figure 2 differ only in the arrangement of the drive 2. On the left, the drive is at the bottom, on the right at the top. This can be useful so that the cable routing of the motor 2 can be selected upwards or downwards, or the cable connection of the drive 2 can be

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according to the invention without relative movement with the level of the runner 4 (table top). Here too, as in Figure 1, the runner(s) 4 can run covered in an extra chamber 13 mounted in or on the tube.
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picture 3

Figure 3 shows the invention as a monostructure with a plate 14 attached to the rotor. The rotor 4 is shown here without a connection 6 to the drive 2 or 5. The rotor can also run in the tube 1 as described. In the same recess as the drive parts or in a separate chamber.

Image 4

Figure 4 shows the invention with the number of columns η = 2 . For stability reasons, both the runners 4 and the foot supports 8 can be firmly connected to one another (connection not shown).

Picture 5 and 6

Figure 5 shows a "soft" end stop solution similar to Figure 1 (5a and 5b). This allows a large spring travel for run-out. This large and important run-out travel has the advantage that the same spring travel acts in both directions, and yet only reduces the possible useful stroke of the spindle by the one stroke (normal stops have a shortening effect twice).

When the spindle 3 with the pot 2 0 reaches the base plate 8, the pot 2 0 compresses the spring 21. A soft run-out

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fen is possible in this way. If the spindle 3 moves in the other direction, the slide 22 comes to a stop on the nut 10 and can thus utilize the spring effect 21. This means that the same spring travel FW of the spring acts in both directions without loss of length when two springs are arranged.

Figure 6 shows the same thing, but not with a compression spring, but with a certain number of disc springs. These can be inserted according to the desired hardness and spring travel.

Claims (8)

1. Guide tube for a table top height adjustment, characterized in that a runner/slider ( 4 ) can be displaced in a form-fitting or non-form-fitting manner by means of a drive ( 2 ) mounted in the guide tube ( 1 ) or at one end of the guide tube ( 1 ). 2. Guide tube according to claim 1, characterized in that the rotor ( 4 ) runs in the guide tube ( 1 ) covered in an extra chamber ( 13 ). 3. Guide tube according to claim 1 or 2, characterized in that the rotor ( 4 ) is connected to a drive part ( 5 or 2 ) via a transmission element ( 6 ). 4. Guide tube according to claim 3, characterized in that a longitudinal recess ( 7 ) in the guide tube ( 1 ) enables the required travel path. 5. Guide tube according to one of the preceding claims, characterized in that the guide tube ( 1 ) is statically connected to further elements (floor/ceiling) only at the bottom ( 8 ), only at the top ( 12 ) or at the bottom and top for its stabilization. 6. Guide tube according to one of the preceding claims, characterized in that one or more guide tubes ( 1 ) are provided as mono-columns or n-fold columns, wherein in the case of several columns the runners ( 4 ) are statically connected to one another. 7. Guide tube according to one of the preceding claims, characterized in that one or more runners ( 4 ) are present on the same guide tube ( 1 ) in order to move several plates and elements to be moved. 8. Guide tube according to one of the preceding claims, characterized in that a spring travel extension (FW) acting in two directions is provided.