Handheld pull and compression device and hydraulic pressure amplifier

Abstract

The invention relates to a hand-held pulling and compressing device and a hydraulic pressure amplifier for an electromechanically driven pulling and compressing device for driving a pulling and pressing tool. In order to provide a hydraulic pressure amplifier for electromechanically driving a hand-held pulling and compressing device and a hand-held pulling and compressing device which can be conveniently and flexibly adapted to different operations, the hydraulic pressure amplifier is provided with a housing body, the hydraulic pressure amplifier is provided with at least one first working chamber filled with hydraulic fluid and a connecting section used for detachably fixing the hydraulic pressure amplifier to the connecting section of the pulling and compressing device. Furthermore, the hydraulic pressure amplifier has a first hydraulic piston, which is arranged in the first working chamber so as to be displaceable between a starting position and an end position, and which has a first piston surface and a coupling section for connecting to a drive element of the pulling and compressing device, which drive element can be adjusted relative to the connecting section. Furthermore, the hydraulic amplifier has a second hydraulic piston which is arranged displaceably at a distance from the first hydraulic piston in the working chamber and has a second piston surface larger than the first piston surface and a mechanical tool connection for pulling and pressing the tool.

Description

Technical Field

[0001] The invention relates to a hand-held pulling and compressing device and a hydraulic force amplifier for an electromechanically driven pulling and compressing device for driving a pulling and pressing tool. Background Art

[0002] In various embodiments, hand-held pulling and compressing devices are known from the prior art, i.e. devices that can be used by a person on the move, such as hand-held electric riveting and pressing devices for setting blind rivet elements, such as blind rivets and blind rivet nuts, or for performing punching processes and setting punch rivets, which have a drive unit for a motor-driven threaded spindle with a screw drive. The screw drive converts the rotary movement of the motor into a linear movement of the pulling and pressing device in a known manner. For example, in the case of a setting process of a blind rivet element, the mandrel of the blind rivet element is moved axially.

[0003] For example, the hand-held pulling and compressing device described above can be used in vehicle repair shops when performing repair work on the body of a vehicle and maintaining pipe or cable connections. Depending on the work to be performed, the pulling and compressing device needs to drive a large number of different interchangeable tools, for example with different forces.

[0004] A disadvantage of the known handheld devices which enable the operation of pulling and pressing tools is that their application possibilities are restricted by the design of the device, in particular the spindle drive and / or the drive unit. Summary of the invention

[0005] Based on this, the object of the present invention is to provide a hydraulic force amplifier for an electromechanically driven hand-held pulling and compressing device and a hand-held pulling and compressing device which can be easily and flexibly adapted to different operations.

[0006] The invention solves this problem by a hydraulic force booster having the features of claim 1 and a hand-held pulling and compressing device having the features of claim 11. Claims 2 to 10 give further advantageous embodiments of the hydraulic force booster.

[0007] According to the invention, a hydraulic force amplifier (hereinafter referred to as "force amplifier") has at least one housing body filled with a hydraulic fluid, such as hydraulic oil, which has a connection section for removably fixing the force amplifier to the connection section of the pulling and compressing device. According to the invention, the force amplifier has a first hydraulic piston, which is arranged in a first working chamber so as to be displaceable between a starting position and an end position, which has a first piston surface and a coupling section for connecting to a drive element of the pulling and compressing device, which drive element can be adjusted relative to the connection section. In addition, according to the invention, the force amplifier also has a second hydraulic piston, which is displaceably arranged in the working chamber at a certain distance from the first hydraulic piston and has a second piston surface that is larger than the first piston surface, and a machine tool connection for the pulling and pressing device.

[0008] A hydraulic force amplifier is understood to be a unit designed to increase the pulling and compressing forces generated by a hand-held pulling and compressing device and transmit them to a pulling or pressing tool.

[0009] The working chamber is delimited by an inner wall of the housing body and by a first piston surface of the first hydraulic piston and a second piston surface of the second hydraulic piston, the second piston surface preferably facing the first piston surface.

[0010] The design of the housing body with the connection section makes it possible to fix the force amplifier to the electromechanically driven pulling and compressing device so that it can be used for high pulling or compressing force operation. The first hydraulic piston is reliably connected via its coupling section to a drive element that can be adjusted by the electromechanical drive device, such as a tool holder of the pulling and compressing device.

[0011] The fixed arrangement of the force amplifier on the pulling and compressing device and the connection of the drive element of the pulling and compressing device to the first hydraulic piston make it possible to reliably adjust the first hydraulic piston between a starting position and an end position, so that the second hydraulic piston is adjusted accordingly by the pressure generated in the working chamber. Preferably, the second hydraulic piston can be adjusted between a starting state associated with the starting position and an end position state associated with the end position.

[0012] Due to the fact that the second piston surface is larger than the first piston surface, the force transmitted by the pulling and compressing device to the first hydraulic piston is amplified. The second hydraulic piston can be mechanically connected to the pulling and pressing tool via a tool connection, for example by a form fit in the direction of the longitudinal axis of the housing body, so that the amplified tensile and compressive forces are transmitted to the pulling and pressing tool. Switching between the tensile and compressive forces generated using the pulling and compressing device and the tensile and compressive forces increased by the force amplifier can be achieved in a simple manner by disassembling and assembling the force amplifier.

[0013] In principle, the pressure of the hydraulic oil is sufficient to transfer the tensile force from the first hydraulic piston to the second hydraulic piston. According to an advantageous further development of the invention, it is provided that the second hydraulic piston is connected to the first hydraulic piston in a form-fitting manner via a connecting element. For example, the connecting element is detachably connected to the second hydraulic piston or is integrally formed on the second hydraulic piston. Preferably, the connecting element is designed in such a way that a form-fitting match is produced between the first hydraulic piston and the second hydraulic piston along the longitudinal axis of the housing body. Particularly preferably, the second hydraulic piston is connected to the first hydraulic piston via the connecting element in such a way that a form-fitting match is produced when the first hydraulic piston is adjusted from the end position in the direction towards the starting position. This form-fitting connection ensures a simple adjustment of the second hydraulic piston by the first hydraulic piston in the direction towards the end position and in the direction towards the starting position. The form connection can be designed, for example, in the form of a thread or a bayonet lock, so that both tensile forces and compressive forces of the drive element can be transmitted from the first hydraulic piston to the second hydraulic piston.

[0014] Particularly preferably, the first hydraulic piston has a receptacle for arranging the connecting element. The receptacle is preferably understood to be a cavity of the first hydraulic piston. The receptacle preferably extends in the longitudinal direction of the hydraulic piston with a cross section, for example a circular cross section. Preferably, the cross section of the receptacle is adapted to the shape of the connecting element in such a way that the connecting element can be adjusted within the receptacle when the hydraulic piston is adjusted. Furthermore, the receptacle is preferably sealed against the ingress of hydraulic fluid. The receptacle advantageously counteracts an undesired mutual blocking of the hydraulic pistons when the hydraulic pistons move at different speeds.

[0015] The connection between the first hydraulic piston and the drive element of the pulling and compressing device is essential for the function of the force amplifier. In order to achieve the connection, a coupling element can be arranged on the first hydraulic piston, for example, which can be connected to the drive element in the pulling or device. According to an advantageous further development of the invention, a coupling section is provided that is designed to be connected to the drive element of the pulling and compressing device designed as a tool holder. The tool holder is usually a component that is partially arranged on the end face of the pulling and compressing device and is connected to the electromechanical drive, which is connected to the electromechanical drive, for example, via a screw drive, which makes it easy to replace the pulling and pressing tools. The good accessibility required for this makes it particularly easy to connect the first hydraulic piston of the force amplifier to the tool holder, for example, to bring it into contact. In addition, it can also be connected in a form-fitting manner so that in both adjustment directions of the hydraulic piston, the first hydraulic piston is connected to the tool holder in a form-fitting manner.

[0016] In principle, the connection of the force amplifier to the tension and compression device can be designed as desired. According to an advantageous embodiment of the invention, it is provided that the connection section of the force amplifier has a thread or a latching body for detachable fastening to the connection section of the tension and compression device having a thread or a latching body receptacle. A corresponding design of the connection section enables a safe and easily removable connection of the force amplifier to the tension and compression device without the need for further components and / or fastening elements. In order to release the connection between the force amplifier and the tension and compression device, it is only necessary to unscrew the force amplifier from the thread or to release the latching connection.

[0017] For example, the hydraulic pistons are arranged relative to each other in such a way that the hydraulic pistons can be adjusted along an axis, for example in the direction of the longitudinal axis of the housing body. However, according to an advantageous further development of the invention, it is provided that the hydraulic pistons can be arranged at an angle relative to each other. For example, the hydraulic pistons are arranged at an angle to each other, for example between 70°-180°, preferably between 75°-180°, and most preferably between 80°-180°. The angle between the hydraulic pistons preferably refers to the angle between the longitudinal axis of the first hydraulic piston and the longitudinal axis of the second hydraulic piston. The housing body is particularly preferably designed so that the hydraulic pistons in the above-mentioned area can be adjusted between different angular positions, for example 90°, 135° and 180°. Preferably, the housing body is preferably composed of at least two parts. Preferably, the housing body has two housing parts, which can be rotated relative to each other by an articulation element. The articulation element is preferably arranged on the housing in the area of ​​the working chamber filled with hydraulic fluid, in particular between the hydraulic pistons. Since the hydraulic pistons can be arranged flexibly or fixedly at a certain angle relative to each other, the advantageous design of the housing body makes it possible to easily and, if appropriate, flexibly change the direction of the forces, so that the pulling and compression devices connected to the hydraulic force amplifier can be used particularly easily in different, even confined environments, such as areas that are difficult to reach by motor vehicles.

[0018] According to an advantageous further development of the invention, it is provided that the housing body has a second working chamber filled with hydraulic fluid, which second working chamber is formed by two partial working chambers connected by a hydraulic coupling. The partial working chambers are preferably spaced apart from one another by the hydraulic piston and / or the first working chamber, preferably in the direction of the longitudinal axis of the housing body, and are connected to one another by a hydraulic coupling, for example a line for the hydraulic fluid.

[0019] Particularly preferably, the first hydraulic piston has a third piston surface arranged at a distance from the first piston surface, and the second hydraulic piston has a fourth piston surface arranged at a distance from the second piston surface, the third and fourth piston surfaces each being arranged in one of the partial working chambers of the second working chamber. Preferably, the partial working chamber is delimited by the two hydraulic pistons, in particular the third piston surface or the fourth piston surface, and the inner wall of the housing body. The third piston surface is preferably arranged on the first hydraulic piston facing away from the first piston surface. The fourth piston surface is preferably arranged on the second hydraulic piston facing away from the second piston surface.

[0020] Preferably, the piston surfaces of the two hydraulic pistons are connected to one another via a support element, which particularly preferably defines the distance between the piston surfaces of the hydraulic pistons. The advantageous configuration of the second working chamber and the hydraulic piston enables a simple and reliable hydraulic return of the second hydraulic piston when the first hydraulic piston is adjusted from the end position to the starting position. In addition, this embodiment of the invention can also counteract the risk of cavitation in the hydraulic fluid located in the first working chamber.

[0021] According to an advantageous further development of the invention, it is provided that the second working chamber is connected to a compensating volume for thermal balancing of the hydraulic fluid. The compensating volume is preferably understood to be a container which is connected to the second working chamber, for example, by a line. The compensating volume is preferably designed to store some of the hydraulic fluid in the second working chamber in the event of thermal expansion and, particularly preferably, to release it back into the second working chamber. For example, the compensating volume has a third hydraulic piston. The third hydraulic piston is preferably adjustable to receive and / or distribute hydraulic fluid in the compensating volume. Preferably, the compensating volume has a spring element for pre-tensioning the third hydraulic piston, in particular a spring pre-tensioning, in order to automatically distribute the hydraulic fluid stored in the compensating volume into the second working chamber.

[0022] According to an advantageous further development of the invention, it is provided that the tool connection has a quick coupling. A quick coupling refers to a mechanical coupling of the tool connection which is preferably designed in such a way that the pulling and pressing tool can be easily and quickly connected to the tool holder. For example, the quick coupling takes the form of a bayonet lock or a ball lock. The quick coupling enables an easy and convenient exchange of the pulling and pressing tool connected to the force amplifier.

[0023] The present invention further solves the object by a hand-held pulling and compressing device for driving a pulling and pressing tool, which has:

[0024] - a drive unit comprising a battery-operated electric motor,

[0025] - a screw drive having a threaded spindle connected to the unit and rotatably mounted on the housing body, and a threaded nut rotatably mounted on the threaded spindle and non-rotatably mounted on the housing body via a bearing unit, and

[0026] - a coupling unit connected to the tool holder for transmitting tensile and compressive forces from the threaded spindle in the rotational direction from the threaded nut to the tool holder, wherein

[0027] The pulling and compressing device can be detachably connected to a hydraulic force amplifier according to the invention or further developed as described above.

[0028] In addition to driving the mechanically driven pulling and pressing tool with the maximum force generated by the pulling and pressing device, the handheld pulling and pressing device according to the present invention also enables driving with a force exceeding the maximum force by a force amplifier. Therefore, if necessary, switching between the original drive by the pulling and pressing device and the amplified drive by the force amplifier can be carried out in a simple manner by connecting or disconnecting the force amplifier and the pulling and pressing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Embodiments of the present invention will be explained below with reference to the accompanying drawings. The accompanying drawings show:

[0030] Figure 1 A perspective view of a schematic diagram of a hydraulic force amplifier for a hand-held pulling and compressing device;

[0031] Figure 2a for Figure 1 A cross-sectional view of a schematic diagram of a hydraulic pressure amplifier, wherein the first hydraulic piston is arranged in a starting position;

[0032] Figure 2 Figure 1 and Figure 2a A cross-sectional view of a schematic diagram of a hydraulic pressure amplifier wherein the first hydraulic piston is disposed in a terminal position;

[0033] Figure 3 is a perspective view of a schematic diagram of a pulling and compressing device having a hydraulic force amplifier disposed thereon;

[0034] Figure 4a for Figure 3 A cross-sectional view of a schematic diagram of a pulling and compressing device of FIG. 1 , wherein a hydraulic pressure amplifier is arranged thereon and a first hydraulic piston is arranged in a starting position;

[0035] Figure 4b for Figure 3 and Figure 4a A cross-sectional view of a schematic diagram of a pulling and compressing device of FIG. 1 , wherein a hydraulic pressure amplifier is arranged thereon and a first hydraulic piston is arranged in an end position;

[0036] Figure 5 A perspective view of a schematic diagram of another embodiment of a hydraulic pressure amplifier.

[0037] Reference numerals list

[0038] 1Hydraulic amplifier

[0039] 2 Shell body

[0040] 3First hydraulic piston

[0041] 4 Second hydraulic piston

[0042] 5 Inner wall

[0043] 6First piston surface

[0044] 7 Second piston surface

[0045] 8First working chamber

[0046] 9 Shoulders

[0047] 10Connection elements

[0048] 11 housing (cavity)

[0049] 12Inner surface

[0050] 13 Cover

[0051] 14Pull / Compression Device

[0052] 15 Connection section

[0053] 16 connection sections (pulling and compression devices)

[0054] 17 Motor

[0055] 18 drive units

[0056] 19 thread spindle

[0057] 20 screw drive device

[0058] 21 thread nut

[0059] 22 Piston rod, tool holder (driving element)

[0060] 23 end surface (first hydraulic piston)

[0061] 24 coupling section (first hydraulic piston)

[0062] 25 coupling units

[0063] 26 end faces (coupling unit)

[0064] 27 Shell body (pulling and compression device)

[0065] 28 Tool connection

[0066] 29 Second working chamber

[0067] 30 Third piston surface

[0068] 31 Fourth piston surface

[0069] 32 Parts of working chamber

[0070] 33 Hydraulic coupling (pipeline)

[0071] 34 Support elements

[0072] 35 Compensation volume

[0073] 36 Spring element

[0074] 37 Third hydraulic piston

[0075] L Longitudinal axis of the housing body (force amplifier) DETAILED DESCRIPTION

[0076] Figure 1 The sectional view shows an exemplary embodiment of a hydraulic pressure booster 1 which has a housing body 2 and a cover 13 which seals the housing body 2 in a sealing manner.

[0077] The first hydraulic piston 3 can Figure 2a The starting position and Figure 2b The second hydraulic piston 4 is arranged inside the housing body 2. The inner wall 5 of the housing body 2, together with the first piston surface 6 of the first hydraulic piston 3 and the second piston surface 7 of the second hydraulic piston 4, which is arranged at a certain distance from the first piston surface 6 and faces the first piston surface 6, defines a first working chamber 8, which is filled with hydraulic fluid. The second hydraulic piston 4 can be adjusted between the end positions shown. Figure 2a The starting position shown is associated with the starting state and Figure 2b The end positions shown are associated with the end states that are adjusted within the housing body 2. Figure 2a Starting from the starting position shown, the first hydraulic piston 3 can be adjusted to Figure 2b The end position shown, during adjustment, the pressure generated by the hydraulic fluid arranged in the working chamber 5 causes the second hydraulic piston 4 to move from the starting state, in which the second hydraulic piston is partially abutted against the shoulder 9 of the base body 4 with the second piston surface 7 facing the working chamber 5, to the ... Figure 2b The termination status shown.

[0078] In order to return the second hydraulic piston 4 from the end state shown in FIG. 2 to Figure 2bIn the starting state shown, a connection element 10 for positively connecting the hydraulic pistons 3 and 4 is used, which is arranged at one end on the second hydraulic piston 4 and is received at the other end in a housing provided on the first hydraulic piston 3 and having the shape of a cavity 11. When the first hydraulic piston 3 is adjusted from the end position to the starting position, the connection element 10 abuts against the inner surface 12 of the cavity 11, so that when the first hydraulic piston 3 returns from the end position to the starting position, a positive fit is formed between the hydraulic pistons 3 and 4 in the direction of the longitudinal axis L of the housing body. By means of a tool connection 28, the second hydraulic piston 4 can be mechanically connected to a pulling and pressing tool, not shown, so that the tensile and compressive forces amplified by the force amplifier 1 are transmitted to the pulling and pressing tool.

[0079] To connect force amplifier 1 to Figure 3 In the illustrated pulling and compressing device 14 , the housing body 2 has a connecting section 15 which is designed for detachable connection to a connecting section 16 of the pulling and compressing device 14 , so that the force amplifier 1 can be arranged in a fixed position on the pulling and compressing device 14 .

[0080] The pulling and compressing device 14 has a drive unit 18, which includes an electric motor 17, by which a threaded spindle 19 of a screw drive 20 arranged in a housing body 27 can be driven. In addition to the threaded spindle 19, the screw drive 20 also has a threaded nut 21, which is arranged on the threaded spindle 19 and is non-rotatably mounted on the housing body 27. The threaded nut 21 serves to drive a tool holder in the form of a piston rod 22, which is mounted so as to be adjustable in the direction of the longitudinal axis of the threaded spindle 19, so that the first hydraulic piston 3 can be adjusted in the direction of the force amplifier 1 by the pulling and compressing device 14 via the piston rod 22 as a drive element. The first hydraulic piston 3 has a coupling section 24 on the end face 23 facing the piston rod 22, so that the movement of the piston rod 22 is reliably transmitted to the first hydraulic piston 6. The piston rod 22 is connected to the threaded nut 21 by a detachable coupling unit 25, which abuts against the end face 26 of the threaded nut 21 facing away from the piston rod 22 at its end opposite to the piston rod 22. The bearing unit 38 attached to the coupling unit 25 serves to non-rotatably mount the threaded nut 21 on the housing body 27 .

[0081] Another embodiment of the hydraulic pressure amplifier 1 is shown. Figure 5 The hydraulic pressure amplifier 1a shown in the figure is the same as the hydraulic pressure amplifier 1a according to the invention. Figures 1 to 4bThe force amplifier of the embodiment of the invention differs in that the connecting element 15 is missing, the second working chamber 29 and the alternative design of the hydraulic pistons 3a, 4a are missing. The first hydraulic piston 3a has a third piston surface 30 arranged at a distance from the first piston surface 6, and the second hydraulic piston 7 has a fourth piston surface 31 arranged at a distance from the second piston surface 7. The second working chamber 29 is formed by two partial working chambers 32, each of which is bounded by the third piston surface 30 or the fourth piston surface 31 and the inner wall 5 of the housing body 2a. The partial working chambers 32 are separated from each other in the direction of the longitudinal axis of the housing body 2a by the hydraulic pistons 3a, 4a and the first working chamber 8 and are connected to each other by a hydraulic coupling in the form of a line 33 for the hydraulic fluid.

[0082] Furthermore, the piston surfaces 6, 7, 30, 31 of the two hydraulic pistons 3a, 4a are each connected to one another via a support element 34, which defines the distance between the piston surfaces 6, 7, 30, 31 of the hydraulic pistons 3a, 4a. The second working chamber 29 is also connected to a compensation volume 35 for thermal compensation of the hydraulic fluid. The compensation volume 35 has a spring element 36 for spring pretensioning a third hydraulic piston 37 arranged on the compensation volume 35.

[0083] The hydraulic force amplifier 1 enables a pulling and pressing tool to be driven with an increased pressing force in a simple and reliable manner by means of a handheld pulling and compressing device 14 , which means that the pulling and compressing device 14 can be used flexibly for various operations.

[0084] All features associated with the various embodiments of the present invention may be provided to the hydraulic force amplifier or the handheld pulling and compressing device in different combinations to achieve their advantageous effects, even if these features have been described with respect to different embodiments.

Claims

1. A hydraulic pressure amplifier for an electromechanically driven pulling and compressing device (14) for driving a pulling and pressing tool, comprising: a housing body (2) having at least one first working chamber (8) filled with a hydraulic fluid, the housing body having a connecting section (15) for detachably fixing the force amplifier (1) to a connecting section (16) of the pulling and compressing device (14), - a first hydraulic piston (3), which is displaceably arranged in the first working chamber (8) between a starting position and an end position, comprising - a first piston surface (6), and a coupling section (25) for connecting to a drive element (22) of the pulling and compressing device (14), the drive element being adjustable relative to the connecting section (16), and - a second hydraulic piston (4) which is displaceably arranged in the first working chamber (8) at a certain distance from the first hydraulic piston (3), comprising - a second piston surface (7) that is larger than said first piston surface (6), and - Mechanical tool connection (28) for pulling and pressing tools.

2. The hydraulic pressure amplifier according to claim 1, characterized in that: The second hydraulic piston (4) is connected to the first hydraulic piston (3) in a form-fitting manner via a connecting piece (10).

3. The hydraulic pressure amplifier according to claim 1 or 2, characterized in that: The first hydraulic piston (3) has a receptacle (11) for arranging a connecting element (10).

4. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The coupling section (25) is designed to be connected to a drive element of the pulling and compression device (14) designed as a tool holder (22).

5. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The connecting section (15) has a thread or a latch body for detachably fixing to the connecting section (16) of the pulling and compressing device (14) having a thread or a latch body receiving portion.

6. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The hydraulic pistons can be arranged at an angle to each other.

7. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The housing body (2a) has a second working chamber (29) filled with a hydraulic fluid, wherein the second working chamber (29) is formed by two partial working chambers (32) connected by a hydraulic coupling (33).

8. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The first hydraulic piston (2a) has a third piston surface (30) arranged at a certain distance from the first piston surface (6), and the second hydraulic piston (4a) has a fourth piston surface (31) arranged at a certain distance from the second piston surface (7), the third and fourth piston surfaces (30, 31) each being arranged in one of the partial working chambers (32) of the second working chamber (29).

9. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The second working chamber (29) is connected to a compensation volume (35) for thermal compensation of the hydraulic fluid.

10. The hydraulic pressure amplifier according to at least one of the preceding claims, characterized in that The tool connection (28) has a quick coupling.

11. A hand-held pulling and compressing device for driving a pulling and pressing tool, comprising: - a drive unit (18) comprising a battery-operated electric motor (17), - a screw drive (20) having a threaded spindle (19) connected to the drive unit (17) and rotatably mounted on a housing body (27); and a threaded nut (21) rotatably mounted on the threaded spindle (19) and non-rotatably mounted on the housing body (28) via a bearing unit (38), and a coupling unit (25) connected to a tool holder (22) for transmitting the tensile and compressive forces resulting from the rotational direction of the threaded spindle (19) from the threaded nut (21) to the tool holder (22), It is characterized in that There is also a hydraulic force amplifier (1) according to at least one of claims 1 to 10, which is detachably connected to the pulling and compressing device (14).

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