DE8716304U1 - Clamping element - Google Patents

Description

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Kurt Sistig;, 5203 MUdH 08. Dec< 1987

Herbert delimit &zgr;, 5200 Siegburg: Ne/Pa(0182 A)

Ä1 be^&euro; Biertheif,, 52ÖÖ- Siegburg; GM 8740 DE

Clamping element }J

Description

The invention relates to a clamping element for axially fixing two tubular bodies inserted into one another in relation to axial pressure forces. Such elements of simple design with great ease of movement are particularly necessary in the area of the suff port, where extension parts of booms or mast extensions are to be fixed in any desired position with little effort and without any steps. The load is only applied as an axial shear load, i.e. in the sense of a shortening of the tubular sections inserted into one another.

Up to now, designs have been used in which the pipe with a smaller diameter has ring grooves into which O-rings are inserted, which then clamp against the pipe with a larger diameter. The disadvantage of these ring grooves is that they only allow for step-by-step adjustment.

The invention is based on the object of providing a particularly simple and inexpensive construction for the same purposes, which enables a continuous adjustment

A first solution is a clamping element which is characterized by an inclined pipe section (5) made of essentially deformation-resistant raw material, the outer diameter of which in axial projection lies within the wall thickness of the pipe (1) with a larger diameter or of an Arbor socket (J) placed thereon and with an inner elastic coating, the inner diameter of which in axial projection corresponds approximately to the outer diameter of the thinner inserted pipe (2), the axes of the outer diameter of the pipe section (5) and the inner diameter of the coating (6) being coaxial with one another.

An equivalent solution consists of a clamping element, which is characterized by a straight pipe section (5) made of essentially deformation-resistant pipe material, the outer diameter of which in axial projection lies within the wall thickness of the pipe (1) with a larger diameter or a stop sleeve (7) placed on it and with an inner elastic coating (ö), the inner diameter of which in axial projection corresponds approximately to the outer diameter of the thinner inserted pipe (2), whereby the axes of the outer diameter of the pipe section | (5) and the inner diameter of the coating (6) form an angle with each other.

The effect according to the invention consists in the fact that the elastic element with ^a circular coating in the passage opening can be pushed onto the pipe passage with little resistance and can be brought into any position. In this case, there may be a slight pre-stress of the elastic coating.

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.:Inserting the pipe with a thinner diameter into the pipe with a thicker diameter creates contact between the ■externally inelastic pipe material and the face of the ■pipe with a larger diameter. This leads to a tilting of the coating of the clamping element, whereby the pre-tension of the elastic inner coating increases locally and a sufficient clamping effect is achieved to prevent the pipe with a smaller diameter from being pushed in further. When the load is released and pulled out, the clamping effect is immediately eliminated.

A significant advantage of the clamping element according to the invention is that it can be produced using an extremely simple manufacturing process by sawing off constantly wide pipe sections from the round base material, whereby an inner coating can already be permanently applied in a suitable manner beforehand and can be re-drilled or re-cut if necessary.

Preferred embodiments are shown in the drawings.

Figure 1 shows a clamping element according to the invention

according to a first solution before and after the onset of axial fixation.

Figure 2 shows a clamping iron according to the invention

according to a second solution before and after the onset of axial fixation.

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k . In Figure 1, a pipe 1 with a larger diameter*, a pipe 2 with a smaller diameter inserted into it and '

^¥ ''' - a clamping element 3 according to the invention pushed onto this is shown. The clamping element 3 has an outer inclined tube section 5 of great dimensional rigidity and an inner elastic coating 6 with a uniform material thickness, so that the axes of the outer diameter and the inner diameter coincide. The tube 2 is pushed further into the tube i in the direction of the arrow. On the left is

i, ¹ the clamping element 3 with axial distance to the front face 4

the pipe 1 can be seen; on the right it is shown how the clamping element 3 has come to rest on the front surface 4 of an adapter sleeve 7 placed on the pipe 1 and has thereby positioned itself with its central axis at an angle to the longitudinal axis of the pipes. This deforms the elastic layer 6, which thereby generates clamping forces.

Figure 2 also shows a pipe 1 with a larger diameter, a pipe 2 with a smaller diameter pushed into it and a clamping element 3 according to the invention ^pushed onto it. The clamping element comprises an outer straight pipe section 5 with a large shape and an inner elastic coating with a non-uniform wall thickness, such that the axes of the through opening and the outer circumference form an angle with one another.

The pipe 2 is inserted into the pipe 1 in the direction of the arrow. On the left, the clamping element 3 is shown with an axial distance to the front surface 4 of the pipe I ; on the right,

^&psgr; the clamping element 3 on the front face 4 of a stop

Inuffe 7 is shown in the appendix.

The axis of the outer section is coaxial with the longitudinal axis of the pipes. The elastic coating is deformed and thereby generates clamping forces.

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Kurt Sistig, 5203 Much Herbert Schmitz, 5200 Siegburg Albert Bierther, 5200 Siegburg

08 Dec 1987 Ne/Pa(0182 A)

GM 8740 DE

Clamping element

Reference list

Pipe (thicker diameter) Pipe (thinner diameter) Clamping element End face Rigid pipe section Elastic coating Stop sleeve

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Claims (4)

Kurt Sistig, 5203 Much 08. Dec. 1987 Herbert Schmitz, 5200 Siegburg Ne/Pa(0182 A) Albert Bierther, 5200 Siegburg GM 8740 DE clamping element protection claims 1. Clamping element for axially fixing two tubular bodies inserted into one another with respect to axial compressive forces, marked by an inclined pipe section (5) made of essentially deformation-resistant pipe material, the outer diameter of which in axial projection lies within the wall thickness of the pipe (1) with a larger diameter or a stop sleeve (7) placed thereon and with an inner elastic coating (6) whose inner diameter in axial projection corresponds approximately to the outer diameter of the thinner inserted pipe (2), the axes of the outer diameter of the pipe section (5) and the inner diameter of the coating (6) being coaxial to one another. 2. Clamping element for axially fixing two interlocking inserted pipe body with respect to axial compressive forces, marked by *4 iH*i t ti Hit it t ti i ii t tit* "' \ V ' i ^u tt Cl t a straight pipe section (5) made of essentially deformation-resistant pipe material, the outer diameter of which in axial projection lies within the wall thickness of the pipe (1) with a larger diameter or a stop sleeve (7) placed thereon and with an inner elastic coating (6), the inner diameter of which in axial projection corresponds approximately to the outer diameter of the thinner inserted pipe (2), v.-wherein the axes of the outer diameter of the pipe section (5) and the inner diameter of the coating (6) form an angle with one another. 3. Clamping element according to claim 1 or 2, characterized in that the outer pipe section (5) is made of light metal. 4. Clamp lenient according to claim 1, 2 or 3, characterized in that the inner coating (6) consists of polyurethane or rubber. f 1 ti I J £ �iacgr; ' t i «■ if l.ll Ht