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Lifting device with toggle mechanism

A lifting device, toggle lever technology, applied in the direction of lifting device, lifting frame, manufacturing tools, etc., can solve problems such as inaccuracy

Active Publication Date: 2017-08-25
WALTER MASCHINENBAU GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not advantageous as the mass of the drive must also move completely
Furthermore, it has been found that the actuation of the working position of such an elevator is too imprecise for many applications

Method used

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  • Lifting device with toggle mechanism
  • Lifting device with toggle mechanism
  • Lifting device with toggle mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Figure 1 to Figure 3 The lifting device 10 is shown and includes a lifting member 11 that can move in the lifting direction H. The lifting member 11 is plate-shaped. The lifting member includes a mounting surface 12 on which a support unit 13 (as shown in the exemplary embodiment here) and / or a chuck unit can be mounted. The supporting unit 13 includes a supporting member 14 having a supporting groove 15, and the cross-section of the supporting groove 15 may be arcuate or prismatic. The not-shown workpiece in the supporting recess 15 may be partially enclosed and supported in its axial extension direction. In this way, the supporting unit 13 at a certain axial distance from the chuck can support the workpiece on one side of the chuck, thereby avoiding bending when the workpiece is machined.

[0034] In a variant of the illustrated exemplary embodiment, a chuck can also be used with a tailstock or the like on the lifting member 11. For example, a chuck can be used to mo...

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PUM

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Abstract

The invention relates to a lifting device (10) comprising a lifting member (11) movable in a linear direction between a rest position (R) and a working position (A). The lifting part (11) carries a support unit (13) for the workpiece and / or a clamping unit for said workpiece. At least one drive device (18), and in particular two drive devices (18), are provided for moving the lifting element (11). Each drive device (18) comprises a toggle mechanism (22) comprising a first toggle lever (22a) pivotally supported on the lifting member (11) and a second toggle lever supported on the base member (17). Two toggle levers (22b). The two toggle levers (22a, 22b) are pivotally supported one behind the other on a common elbow joint (31). The driver (19) of the drive unit (18) is in contact with the elbow joint (31). The positioning device (40) predetermines the position of the lifting element (11) in the lifting direction (H) and in particular transversely to the lifting direction (H) in the working position (A). For this purpose, the positioning device preferably has a stop surface (41) against which the lifting member (11) is pushed into the working position (A) by means of at least one drive device (18). In this working position (A), the elbow joint angle (α) of the toggle mechanism 22 is less than 180°, so that the two toggle levers ( 22 a ) and ( 22 b ) of the toggle mechanism ( 22 ) are outside the extended position.

Description

Technical field [0001] The present invention relates to a lifting device having a lifting member that moves between a working position and a rest position in a linear manner. A supporting unit and / or a clamping unit for supporting or clamping the workpiece in place are provided on the lifting member. For example, the supporting unit may be a pillar provided for supporting a cylindrical workpiece. The clamping unit may include, for example, a tailstock or similar clamping device, in order to clamp the workpiece in place, especially in the axial direction. Preferably, the lifting device is arranged to be used in a grinding machine in order to grind cylindrical workpieces. Background technique [0002] For example, a lifting table is already known from the publication DE 36 709 U1. This kind of lifting platform includes a platform top, a base part and a lever assembly with four levers, the levers are hinged one after another to form a closed loop. One of the joints of the lever ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q1/25B23Q7/00B23Q16/00B66F7/00
CPCB23Q7/005B23Q1/25B23Q16/001
Inventor D.辛德勒S.屈默勒
Owner WALTER MASCHINENBAU GMBH