AT526275A2 - Clamping device and panel saw with a clamping device - Google Patents

Abstract

The present invention relates to a clamping device (1) for clamping a workpiece, in particular on a machine table, comprising a clamping device unit (30) having a clamping device, a hammerhead screw (10), and a clamping sleeve (20) which can be screwed onto the hammerhead screw (10), wherein the clamping device unit (30) comprises a locking pin (40) which can be inserted into the clamping sleeve (20) and wherein the locking pin (40) in the clamping sleeve (20) can be coupled to the hammer head screw (10). The present invention further relates to a panel saw with a machine table and a clamping device (1).

Description

15

20

25

30

HOKO021 1

Clamping device and panel saw with a clamping device

tung

The present invention relates to a clamping device for clamping a workpiece, in particular for clamping a workpiece on a machine table, preferably a panel saw, with the features of patent claim 1 and a

Sliding table saw with the features of patent claim 15.

Clamping devices are known from the prior art in different designs. Especially for panel saws, clamping devices are known from the prior art, which use eccentrics or pneumatic ones

Clamping cylinder clamps the respective workpiece.

Such clamping devices have proven themselves in the past. However, it has been shown that they are often unwieldy to use, have a particularly high weight and are expensive to purchase. In addition, such known clamping devices can only be used vertically

Clamping direction can be used.

This is where the present invention comes into play.

The present invention is dedicated to the task of proposing an expediently improved clamping device. The clamping device should be easy to handle and have a low weight. Furthermore, the clamping device should be of simple construction and inexpensive in terms of acquisition costs

be.

These tasks are carried out using a tensioning device

a workpiece with the features of patent claim 1 and

15

20

25

30

HOKO021 2

through a panel saw with the features of the patent application

Proverb 15 solved.

Further advantageous embodiments of the present invention

dung are specified in the subclaims.

The clamping device according to the invention with the features of claim 1 for clamping a workpiece, in particular for clamping a workpiece on a machine table, preferably a panel saw, has a clamping device unit having a clamping device, a hammerhead screw and a clamping sleeve which can be screwed onto the hammerhead screw. The clamping device unit also preferably comprises a locking pin at the end, which can be inserted into the clamping sleeve, it being provided according to the invention that the locking pin in the clamping sleeve is directly connected to the hammer head screw

can be linked indirectly.

The present invention is based on the idea that, for fastening the clamping device, the hammerhead screw, in particular a thread of the hammerhead screw, can be coupled both to the clamping sleeve and to the clamping device unit, which makes both the handling and the construction of the proposed clamping device particularly simple and make it compact. To attach the clamping device, for example to a machine table of a panel saw, the hammerhead screw can first be inserted into a receiving groove provided there, preferably a T-slot. The clamping sleeve can then be screwed onto the thread of the hammer head screw protruding from the receiving groove. The machine table is clamped between the hammer head screw and the clamping sleeve, thereby changing the position

the clamping sleeve is fixed on the machine table; about it

15

20

25

30

HOKO021 3

In turn, the position of the clamping device on the machine table is determined. The locking pin of the clamping device unit can then be inserted or inserted into the clamping sleeve. Here, either a coupling with the hammerhead screw can take place by screwing the clamping sleeve to the thread of the hammerhead screw, or by clamping the locking pin in the clamping sleeve, especially when the workpiece is clamped by the clamping device unit, and connecting it to the hammerhead screw via the clamping sleeve . This takes advantage of the fact that the clamping device transmits transverse forces and/or torque via the locking pin to the clamping sleeve, whereby the locking pin is in the

Clamping sleeve can tilt or jam.

As a result, the locking pin is in or, in other words, within the volume surrounded by the clamping sleeve in the clamping sleeve with the hammer head screw directly or medium-

bar coupled.

A further advantageous embodiment of the present invention provides that the clamping sleeve has a through hole. The through hole connects two opposite end faces of the clamping sleeve and is preferably coaxial

arranged to an axis of symmetry of the clamping sleeve.

A further aspect of the present invention provides that the through hole has a threaded section corresponding to the hammer head screw and a receiving section. The threaded section is designed to interact with the thread of the hammerhead screw and to provide a screw connection between the hammerhead screw and the threaded end.

cut to form the clamping sleeve. The recording section is

15

20

25

30

HOKO021 4

designed so that the locking pin is completely or

can be partially used.

According to a further development, it is provided that the hammerhead screw protrudes through the threaded section of the clamping sleeve. Preferably, the thread is at least twice, preferably approximately three times, as long as the threaded section of the clamping sleeve. This can ensure that when the clamping device is attached to the machine table, the thread of the hammer head screw extends over the threaded section.

protrudes into the clamping sleeve.

According to a further development of the present invention, the through hole is designed to be stepped. Preferably, the through hole tapers gradually from one of the two end faces to the other of the two end faces, with the through hole preferably being in the narrowest cross section.

tion the threaded section is formed.

Furthermore, it is advantageous if the locking pin has at least two circular cylinder sections adapted to the clamping sleeve and arranged in steps. The step-shaped circular cylinder sections have different diameters and are arranged in such a way that the locking pin tapers towards a free end face. The outer diameter of the circular cylinder sections and the inner diameter of the through hole of the clamping sleeve are preferably coordinated with one another in such a way that, starting from the circular cylinder section with the smallest outer diameter, the gap between the respective circular cylinder section and the diameter

bore increases.

15

20

25

30

HOKO021 5

A further development of the present invention provides that the locking pin has a blind hole on a free end face into which the hammerhead screw or the thread of the hammerhead screw can be inserted. The blind hole is preferably designed coaxially to the axis of symmetry of the locking pin and can further preferably be dimensioned such that the thread protrudes freely into the blind hole

can.

The blind hole can also be provided with a thread that corresponds to the thread of the hammer head screw. The hammer head screw or the thread of the hammer head screw can be inserted into the thread of the blind hole or the clamping sleeve

be screwed in.

In addition, it has proven to be advantageous if the clamping sleeve is provided with knurling. The knurl makes the clamping sleeve particularly easy to grip and can be tightened or loosened by hand in order to place the clamping sleeve on the machine.

to fix the table in a desired position.

According to a further development, the clamping device unit can include a thrust piece, a tool and/or a measuring device. The push piece is configured to apply a clamping force to the respective workpiece to be clamped and can preferably apply a clamping force to the horizontal or vertical when the clamping device is used as intended

Attach workpiece. Furthermore, the clamping device unit can also have a profile

rail and a clamping bracket arranged on the profile rail

include, wherein the pushing part is arranged on the clamping bracket

15

20

25

30

HOKO021 6

is. The profile rail preferably extends in the axis of symmetry of the locking pin and can be encompassed by the clamping bracket. At one end, the locking pin is arranged on the profile rail and at the other end, a safety device can be provided, which can prevent unwanted loosening of the clamping bracket from the profile rail. The profile rail is preferred

materially connected to the locking pin.

In addition, it has proven to be advantageous if the clamping device unit or the pushing part is used as a lever clamp or as

Screw clamp is designed.

Another aspect of the present invention relates to a panel saw with a machine table and a previously described clamping device for clamping a workpiece, the machine table having at least one T-slot into which the hammerhead screw can be inserted and the machine table between the hammerhead screw and the clamping sleeve for fastening the Clamping device can be clamped on the machine table

is.

An advantageous development provides that a shim is provided between the clamping sleeve and the machine table, which prevents direct contact between the clamping sleeve and the machine table, whereby the machine table and / or the clamping sleeve can be protected from damage. The shim can, for example, be a plastic disc or press disc, preferably

made of a soft metal or the like. Below, with reference to the accompanying drawings,

tion two embodiments of the present invention

Described in detail. Show it:

15

20

25

30

HOKO021 7

Figure 1 is a perspective view of the clamping device according to the invention according to a first exemplary embodiment, comprising a clamping device unit with a locking pin, a hammer head screw and a

the hammer head screw screw-on clamping sleeve,

Figure 2 is a side view of the clamping device according to Figure

1,

Figure 3 shows a partially sectioned and enlarged detailed view of the locking pin, the clamping sleeve and

the hammer head screw and

4 shows a partially sectioned representation of a second exemplary embodiment of a clamping device according to the invention.

contraption.

In the following description of the figures and in the accompanying figures, identical or functionally identical components are used

marked with the same reference numerals. In addition, not everyone in the figures is the same or functionally the same.

chen components are provided with a reference number.

Figure 1 shows a perspective view of the clamping device 1 according to the invention for clamping a workpiece (not shown), in particular for clamping a workpiece on a machine table (not shown), preferably a machine table of a panel saw (not shown). The clamping device 1 comprises a hammer head screw 10, a clamping sleeve 20 which can be screwed onto the hammer head screw 10 and a clamping device

Clamping device unit 30.

15

20

25

30

HOKO021 8

2 and 3, the hammerhead screw 10 comprises an anchor section 12 and a thread 14. The anchor section 12 is set up or configured to be inserted into a receiving groove (not shown), in particular a T-slot, of the machine table, and to reach behind an undercut area (not shown) in the receiving groove. The thread 14 protrudes from the anchor section 12 and protrudes into the receptacle as intended.

menut inserted state out of the receiving groove.

The clamping sleeve 20 can be seen in detail in Figures 2 and 3. The clamping sleeve 20 is preferably a rotationally symmetrical cylinder body and has a first end face 28 and a second end face 29, the first end face 28 and the second end face 29 being arranged on opposite sides in an axis of symmetry of the cylinder body. The clamping sleeve 20 also has a through hole 22, which connects the first end face 28 and the second end face 29. The first end face 28 can form a support surface through which the clamping device 1 can be supported on the machine table. Accordingly, when the tensioning device 1 is used as intended, it is the first

Front side 28 faces the machine table.

The through hole 22 is preferably arranged and points coaxially to the axis of symmetry of the clamping sleeve 20, which in the present case is also referred to as the X axis

a threaded section 23 and a receiving section 25.

The threaded section 23 is in the area of the first end face

28 and extends from there along the axis X

towards the second end face 29. In addition, the

15

20

25

30

HOKO021 9

Threaded section 23 is matched to the thread 14 of the hammer head screw 10, whereby the thread 14 is connected to the threaded section

23 can form a screw connection.

The receiving section 25 is configured to receive the locking pin 40 of the clamping device unit 30, at least in some areas. The sectional view according to Figure 3 shows that the through hole 22 is stepped. The through hole 22 widens gradually starting from the first end face 28 to the second end face 29, with at least one step being formed at the end of the threaded section 23. The receiving section 25 can have two sections with different inner diameters, separated by a further stage

exhibit.

The locking pin 40 of the clamping device unit 30 can be seen in detail in FIGS. 2 and 3, whereby it can be seen that the locking pin 40 adapts to the shape of the receiving section.

tes 25 of the clamping sleeve 20 is adapted.

The locking pin 40 has a free end face 41, into which a hole, preferably a blind hole 42, is made. The thread 14 of the hammer head screw 10 can preferably be inserted freely into the hole. The blind hole 42 is preferably coaxial with the axis of symmetry of the

Locking pin 40 arranged.

The bore can also be provided with a thread 44, the thread 44 corresponding to the thread 14 of the hammer head screw 10. The threads 14, 44 can form a screw connection, which will be described in detail later.

ben will be.

15

20

25

30

HOKO021 10

Figure 3 shows that the locking pin 40 can have at least two circular cylinder sections 47, 48 which are adapted to the clamping sleeve 20 and arranged in a step-like manner adjacent to one another, with the locking pin 40 tapering towards the free end face 41. The first circular cylinder section 47 extends from

the free end face 41.

In the area of the free end face 41, the locking pin 40 can have a chamfer, which simplifies handling when inserting the locking pin 40 into the clamping sleeve 20.

can be accomplished.

The inner diameters of the receiving section 25 and the circular cylinder sections 47 and 48 are preferably coordinated with one another in such a way that a gap dimension between the clamping sleeve 20 and the locking pin 40 starts from the first circular cylinder distance.

average 47 increases.

The clamping device unit 30 also has a profile rail 50, which is arranged on the side of the locking pin 40 opposite the free end face. The profile rail 50 is preferably in the axis of symmetry of the locking pin 40 of the locking pin 40 and can preferably be I-shaped in cross section

be.

At one end, the locking pin 40 is arranged on the profile rail 50 and at the other end, a safety device 52 can be provided, which can prevent the clamping bracket 55 from being undesirably released from the profile rail 50. The profile rail 50 can preferably be connected to the locking pin 40 in a materially bonded manner. On the profile rail 50 there is also a clamping bracket 55 with a push piece 58 that can be actuated by a control panel 56.

arranges, with the profile rail 50, the clamping bracket 55 and that

15

20

25

30

HOKO021 11

Control panel 56 can form a lever clamp or screw clamp. The clamping bracket 55 includes an eye-shaped clamping bracket bushing 54, which can encompass the profile rail 50 and is set up to connect to the profile rail 50 in a known manner

to tilt the position of the clamping bracket 55 on the profile

fix rail.

In the exemplary embodiment shown, the clamping device unit 30 is designed in the manner of a screw clamp. The push piece 58 and the operating part 56 designed as a rotary handle are coupled to the clamping bracket 55 via a clamp thread 57. The clamping means is preferably arranged in such a way that when clamping a torque corresponding to the clamping force or a transverse force is applied to the connection between the clamping sleeve and

acts on the locking pin.

To fasten the clamping device 1, the hammerhead screw 10 is first inserted into the receiving groove of the machine table. The clamping sleeve 20 is then screwed onto the hammer head screw 10 in such a way that the first end face 28 faces the machine table. A shim 60 can be arranged between the machine table and the clamping sleeve 20, as shown in the accompanying figures. The shim 60 prevents direct contact between the clamping sleeve 20 and the machine table and protects it from damage. The shim 60 can be, for example, a plastic disc or a press

be disc.

The clamping sleeve 20 can be tightened and the machine table

is between the clamping sleeve 20 and the anchor section 12

Hammer head screw 10 clamped, thereby changing the position of the

15

20

25

30

HOKO021 12

Clamping sleeve 20 is fixed on the machine table. In this intended state of the clamping sleeve 20, the thread 14 protrudes through the threaded section 23 of the clamping sleeve 20 and protrudes

into the receiving section 25 of the through hole 22.

The clamping device unit 30 is then inserted into the clamping sleeve 20 and coupled directly or indirectly to the hammerhead screw 10. For this purpose, the locking pin 40 is first inserted into the receiving section 25 of the clamping sleeve 20. The thread 14 of the hammer head screw 10 can be inserted into the drilling

Insert the locking pin 40.

As soon as the locking pin 40 is inserted into the receiving section 25 of the clamping sleeve 20, the thrust piece 58 can be brought into effective contact with the workpiece to be clamped. The workpiece can be clamped by operating the control panel 56

become.

In particular when clamping the workpiece, the locking pin 40 can jam within the receiving section 25 of the clamping sleeve 20, whereby the clamping device unit 30 or the clamping device 1 can be securely connected to the machine table. The clamping means generates a moment corresponding to a clamping force and/or a transverse force corresponding to the clamping force, through which the locking pin 40 is positioned within the clamping

sleeve 20 tilted.

In the event that the bore of the locking pin 40 has a thread 44, the locking pin 40 with the thread 14 of the clamping sleeve 20 can be inserted within the through hole 22 of the clamping sleeve 20.

Head screw 10 can be screwed or connected.

15

20

25

HOKO021 13

The hammer head screw 10, the clamping sleeve 20, the locking pin 40 and preferably also the profile rail 50 are arranged coaxially in their respective axis of symmetry, which is shown in the exemplary embodiment based on the drawing

Axis X is clarified.

Figure 4 shows a second embodiment of the present invention. The clamping device 1 according to the second exemplary embodiment is essentially identical to the clamping device 1 according to the first exemplary embodiment and comprises a hammer head screw 10, a clamping sleeve 20 which can be screwed onto the hammer head screw 10 and a clamping device.

send clamping device unit 30.

Unlike in the first exemplary embodiment, however, the push piece 58 is not vertically oriented when used as intended, but rather horizontally oriented. Furthermore, as shown, the locking pin 40 can only consist of a circular cylinder

cylinder section 47 may be formed.

The clamping device unit 30 includes the push piece 58 which can be actuated by the control part 56. The push piece 58 and the control part 56 designed as a rotary handle are connected to the clamping sleeve 20 via a ferrule thread 57, the ferrule thread

57 is formed into the profile rail designed as an extension of the locking pin. The push piece 58 and the clamp

threads 57 are arranged transversely to the X axis.

Reference symbol list

1 tensioning device 10 hammer head screw 12 anchor section

14 threads

20 clamping sleeve

22 through hole 23 threaded section 25 receiving section 28 first end face 29 second end face 30 clamping device unit 40 locking pin

41 front side

42 blind hole

44 threads

47 first circular cylinder section 48 second circular cylinder section 50 profile rail

52 fuse

54 socket

55 tension brackets

56 control panel

57 ferrule threads

58 thrust piece

60 shims

X axis

Claims (1)

15 20 25 30 HOKO021 15 Patent claims 1. Clamping device (1) for clamping a workpiece, especially special on a machine table, having — a clamping device unit (30) having a clamping device, — a hammer head screw (10), and — a clamping sleeve (20) that can be screwed onto the hammer head screw (10), - wherein the clamping device unit (30) comprises a locking pin (40) which can be inserted into the clamping sleeve (20) and — with the locking pin (40) in the clamping sleeve (20). the hammer head screw (10) can be coupled. 2. Clamping device (1) according to claim 1, characterized in that the clamping sleeve (20) has a through hole (22). 3. Clamping device (1) according to claim 2, characterized in that the through hole (22) has a threaded section (23) corresponding to the hammer head screw (10) and a receiving section (25) into which the Locking pin (40) can be used. 4, clamping device (1) according to claim 3, characterized in that the hammer head screw (10) protrudes through the threaded section (23). 10 15 20 25 30 HOKO021 6. 10. Tensioning device through this 16 (1) according to one of claims 2 to 4, marked, that the through hole (22) is stepped. Clamping device, thereby the locking pin (1) according to one of the aforementioned claims marked, (40) at least two to the that clamping sleeve (20) adapted and stepped circular cylinders the sections (4 Clamping device che, thereby the locking pin head screw locking pin (40) is clampable. Clamping device che, thereby the locking pin hole (42) ches the Hammerk Clamping device che, thereby the clamping sleeve ( Tensioning device che, 7, 48). (1) according to one of the aforementioned claims marked, (40) can be screwed into the clamping sleeve (20) (10), or in the clamping sleeve (20). that with the Hamdass the the servers- (1) according to one of the aforementioned claims marked, that (40) on one end face (41) a bag with a thread (44) in which cover screw (10) can be screwed in. (1) according to one of the aforementioned claims marked, 20) has a knurl. that (1) according to one of the aforementioned claims 15 20 25 30 HOKO021 11. 12 13. 14. 15 17 This indicates that the clamping device unit (30) comprises a thrust piece (58). Clamping device (1) according to claim 10, This indicates that the clamping device unit (30) has a profile rail (50) and a clamping bracket arranged on the profile rail (50). (55) with the push piece (58). .Clamping device according to claim 11, characterized in that the locking pin (40) is at one end on the profile rail (50). is arranged. Clamping device according to one of claims 11 or 12, characterized in that the profile rail (50) is cohesively connected to the locking pin (40) is connected. Clamping device according to one of the preceding claims, characterized in that the clamping device unit (30) is designed as a lever clamp or screw clamp is designed. .‚Sliding table saw with a machine table and a clamping Device (1) according to one of the preceding claims, wherein the machine table has a T-slot into which the hammer head screw (10) can be inserted and the machine table between the hammer head screw (10) and the clamping sleeve (20) for fastening the clamping device (1) at can be clamped to the machine table.