DE29622739U1 - Clamping unit for clamping devices that hold workpieces with complex geometries - Google Patents

Description

G (P) 9612 EBU Se/bs

Applicant:
Emil Bucher GmbH & Co
Model and mechanical engineering
Schlossstrasse 146 - 150
D-73054 Eislingen/Fils

Clamping unit for clamping devices that hold workpieces with complicated geometries.

The innovation concerns a clamping unit according to the generic term of claim 1 for clamping devices that hold workpieces with complicated geometry, e.g. vehicle bodies and parts,

For known clamping units for said clamping devices

The individual parts of each clamping unit are manufactured with high precision, then assembled with respect to a base length specified by the user and firmly connected to one another.

In addition to the high manufacturing costs for the individual parts, the disadvantage is the considerable amount of rework required if the manufacturing dimensions are changed during the operation or the tight manufacturing tolerances are not adhered to.

Therefore, the primary purpose of the innovation is to create a clamping unit for the clamping devices in question, which enables the individual parts to be manufactured more cost-effectively and also reduces assembly time, and also allows readjustment by the user during production.

This task is solved by a clamping unit according to claim 1 by combining all of the features shown e.

· The following claims 2 to 5 show further developments or advantageous embodiments of the basic idea of the innovation.

The features of the new clamping unit are also explained using sketch drawings. 10

The drawings show in a largely schematic representation and partly in section in

Fig. 1 is a side view of a renewal device mounted on a 15 base plate.

appropriate clamping unit;

Fig. 2 Section A-A; 20 Fig. 3 Section B-B from Fig. 1 and

Fig. 4 shows another possible design of the middle part of the clamping unit made of a box-shaped profile.

The reference numbers have the following meaning:

1 Foot part la horizontal leg Ib vertical leg Ic Contact surface (u-shaped) ID ■ Installation area 2, 2: Holes 3, 3 Holes 4 Under!washer 4 ¹ Weld points 5 Threaded bolt 5a Passschaft 6 Middle section (box profile) 6a lower end 6b top end 6c ; Guide surface 6d Guide surface 7 lower height adjuster 8th Headboard 8a vertical leg 8b horizontal leg 8c upward-facing (cranked) shank' 8d Surface 8e AtO age surface (u-shaped) 8f Recess

9.9' holes

10 upper height adjuster

11 spacers

G Base plate (e.g. mounting plate with

a large number of threaded holes arranged in a pattern) S ■ clamping unit
T ; clamping part
Ta clamping lever

W Workpiece or forming claw, molded part &khgr; Base length

The description of the new clamping unit

is

characterized by the combination of the following features:

a) the foot part (1) and the head part (8) have

each have a contact surface (8c or 8e), preferably U-shaped, which correspond to a guide surface (6c or 6d) provided on the middle part (6); 25

b) the foot part (1) and the head part (8) are non-positively secured to the middle part (6) by means of detachable threaded bolts (5) which pass through holes (3, 3' or 9, 9') provided in the foot part (1) and in the head part (8) and engage in the middle part (6);

c) the respective diameter of the holes (3, 3' and 9, 9V) as well as of the holes (2, 2') provided in the horizontal leg (la) of the base part (1) is a few millimetres larger than the diameter of a fitting shaft (5a) provided on the threaded bolt (5);

d) immediately after the head of the threaded bolt (5) there is a washer (4) which sits on the fitting shaft (5a) without play and which rests against the outer wall of the base part (1) and the head part (81), and

e) on the horizontal leg (la) of the foot part (1) there is a lower height adjuster (7) acting on the lower end (6a) of the middle part (6) and serving for the manufacturer's adjustment of a base length (x).

Furthermore, it is of particular importance that on the horizontal leg (8b) of the head part (8); a to the upper end (6b) of the middle part (6)

an upper height adjuster (10) is arranged which serves for the user-side readjustment of the base length (x) _;

that the U-shaped contact surface (8e) provided on the vertical leg (8a) of the head part (8) has a lateral recess (8f) in the area of the holes (9, 9')

that the middle part (6), with an overall upward-looking shape, is angled one or more times in the longitudinal direction (Fig. 4).

Furthermore, it is finally pointed out that the middle part 6 preferably consists of a box-shaped profile.

In particular, when the middle part 6 is shaped according to Fig. 4 or a similar shape, the use of solid material with a corresponding cross-section or the production of the middle part 6 as a burnt part is also economical.

Claims (5)

-mg. European Patent Attorney N OR B eWt. WJ ·»·· ···· Patent and civil engineer
Representative on European licences Sign in* &eegr;: Emil Bucher GmbH & Co. Model and mechanical engineering Schloßstraße 146 - 150 D-73054 Eislingen/Fils Patent office: Brehmstrasse 37 D-73033 Göppingen Tel. 07161-71166 Fax 07161-683529 Telegrams: "Sea patent" 17 February 1997 G (P) 9612 EBU Se/bs PROTECTION CLAIMS 1. Clamping unit for clamping devices that hold workpieces (W) with a complicated geometry, consisting of a base part (1), an upstanding middle part (6) and a head part (8), the latter (8) being provided with a commercially available clamping part (T) having at least one clamping lever (Ta), »I characterized by the combination of the following features: a) the foot part (1) and the head part (8) each have a preferably U-shaped, contact surface (8c or 8e), each of which corresponds to a guide surface (6c or 6d) provided on the central part (6); b) by means of detachable threaded bolts (5) which are holes (3, 3' or 9, 9') provided in the foot part (1) and the head part (8) extend through and grip the middle part (6), the foot part (1) and the head part (8) are non-positively fastened to the middle part (6); c) the respective diameter of the holes (3, 3' and 9, 9 ¹ ) as well as of the holes (2, 2 ¹ ) is a few millimetres larger than the Diameter of a fitting shaft (5a) provided on the threaded bolt (5); d) immediately after the head of the threaded bolt (5) . there is a clearance-free seated washer (4) which rests against the outer wall of the foot part (1) and the head part (8), and e) on the horizontal leg (la) of the foot part (1) a lower height adjuster (7) is arranged which acts on the lower end (6a) of the middle part (6) and serves for the manufacturer's adjustment of a base length (x). 2. Clamping unit according to claim 1, characterized by 15 that the middle part (6) consists of a box-shaped profile. 3. Clamping unit according to one of the preceding claims, characterized in that on the horizontal leg (8b) of the head part (8) · a to the upper end (6b) of the middle part (6) acting upper height adjuster (10) is arranged for the user to readjust the base length (x). 4. Clamping unit according to one of the preceding claims, characterized in that the U-shaped contact surface (8e) provided on the vertical leg (8a) of the head part (8) has a lateral recess (8f) in the region of the holes (9, 9 ¹ ). 5. Clamping unit according to one of the preceding claims, characterized, that the middle part (6), with an overall upward-looking shape, is angled one or more times in the longitudinal direction (Fig. 4 ).