HAND-HELD PULLING AND COMPRESSION DEVICE

Abstract

The invention relates to a hand-held pulling and compression device for driving interchangeable tools, with a drive unit comprising a battery-operated electric motor, a screw drive with a threaded spindle connected to the drive unit and rotatably mounted on a housing body, and a threaded nut mounted rotatably on the threaded spindle and non-rotatably on the housing body via a bearing unit, and a coupling unit connected to a tool holder for transmitting tensile and compressive forces resulting from the direction of rotation of the threaded spindle from the threaded nut to the tool holder. In order to provide a hand-held pulling and compression device that can be used flexibly, it is provided that the housing body has a connection section for detachable fixing of a tool device to the pulling and compression device.

Claims

1. Hand-held pulling and compression device for driving interchangeable tools, with a drive unit comprising a battery-operated electric motor, a screw drive with a threaded spindle connected to the drive unit and mounted rotatably on a housing body, and a threaded nut mounted rotatably on the threaded spindle and non-rotatably on the housing body via a bearing unit, and a coupling unit connected to a tool holder for transmitting tensile and compressive forces resulting from the direction of rotation of the threaded spindle from the threaded nut to the tool holder, wherein the housing body has a connection section for detachable fixing of a tool device to the pulling and compression device.

2. Hand-held pulling and compression device according to claim 1, wherein the connection section has a quick coupling which can be adjusted between a locked position and an unlocked position.

3. Hand-held pulling and compression device according to claim 1, wherein the quick coupling is adjustable between the unlocked and locked position by means of an electric drive device.

4. Hand-held pulling and compression device according to claim 1, wherein the quick coupling has a ball latching with a locking ring and a coupling ring having a plurality of openings each with a ball latching body, the coupling ring arranged coaxially with the coupling ring, the coupling ring and the ball latching bodies are matched to one another in such a way that in the locked position the ball latching bodies are arranged in the openings in such a way that they project partially from an inner side of the coupling ring and are secured by the locking ring in a locked position and in the unlocked position the ball latching bodies can be displaced into a release position.

5. Hand-held pulling and compression device according to claim 1, including a locking unit fixing the locking ring in the locked position.

6. Hand-held pulling and compression device according to claim 1, wherein the locking ring is rotatable relative to the coupling ring between the locked position and the unlocked position.

7. Hand-held pulling and compression device according to claim 1, wherein the quick coupling has a sensor unit for detecting the status and a display unit connected to the sensor unit for indicating the detecting of the status.

8. Hand-held pulling and compression device according to claim 1, wherein a communication unit for transmitting the detecting of the status to the drive unit.

9. Hand-held pulling and compression device according to claim 1, wherein the quick coupling is electrically conductively connected to the drive unit.

10. Hand-held pulling and compression device according to claim 2, wherein the quick coupling is adjustable between the unlocked and locked position by means of an electric drive device.

11. Hand-held pulling and compression device according to claim 2, wherein the quick coupling has a ball latching with a locking ring and a coupling ring having a plurality of openings each with a ball latching body, the coupling ring arranged coaxially with the coupling ring, the coupling ring and the ball latching bodies are matched to one another in such a way that in the locked position the ball latching bodies are arranged in the openings in such a way that they project partially from an inner side of the coupling ring and are secured by the locking ring in a locked position and in the unlocked position the ball latching bodies can be displaced into a release position.

12. Hand-held pulling and compression device according to claim 3, wherein the quick coupling has a ball latching with a locking ring and a coupling ring having a plurality of openings each with a ball latching body, the coupling ring arranged coaxially with the coupling ring, the coupling ring and the ball latching bodies are matched to one another in such a way that in the locked position the ball latching bodies are arranged in the openings in such a way that they project partially from an inner side of the coupling ring and are secured by the locking ring in a locked position and in the unlocked position the ball latching bodies can be displaced into a release position.

13. Hand-held pulling and compression device according to claim 2, including a locking unit fixing the locking ring in the locked position.

14. Hand-held pulling and compression device according to claim 3, including a locking unit fixing the locking ring in the locked position.

15. Hand-held pulling and compression device according to claim 4, including a locking unit fixing the locking ring in the locked position.

16. Hand-held pulling and compression device according to claim 2, wherein the locking ring is rotatable relative to the coupling ring between the locked position and the unlocked position.

17. Hand-held pulling and compression device according to claim 3, wherein the locking ring is rotatable relative to the coupling ring between the locked position and the unlocked position.

18. Hand-held pulling and compression device according to claim 4, wherein the locking ring is rotatable relative to the coupling ring between the locked position and the unlocked position.

19. Hand-held pulling and compression device according to claim 2, wherein the quick coupling has a sensor unit for detecting the status and a display unit connected to the sensor unit for indicating the detecting of the status, or wherein the quick coupling is adjustable between the unlocked and locked position by means of an electric drive device.

20. Hand-held pulling and compression device according to claim 4, wherein the quick coupling has a sensor unit for detecting the status and a display unit connected to the sensor unit for indicating the detecting of the status.

Description

[0027] An embodiment of the invention is explained below with reference to the drawings. The drawings show in:

[0028] FIG. 1 a sectional view of a schematic representation of a pulling and compression device with a tool device connected to a connection section;

[0029] FIG. 2 a sectional view of a schematic representation of a quick coupling in an unlocked position and

[0030] FIG. 3 a sectional view of a schematic representation of the quick coupling of FIG. 2 in a locked position.

[0031] FIG. 1 shows a schematic representation of a hand-held pulling and compression device 1 with a tool device 11 connected to a connection section 10 of the housing body 5 of the pulling and compression device 1.

[0032] For driving a threaded spindle 6 of a screw drive 4 the hand-held pulling and compression device 1 has a drive unit 2 with an electric motor 3, which can be controlled and regulated via a control unit 21. The drive unit 2 has an intermediate gear 22 for transmitting the rotational movements of the electric motor 3 to the threaded spindle 6.

[0033] Via the screw drive 4, the rotational movement of the threaded spindle 6 driven by the drive unit 2 is converted into a translational movement of a tool holder designed as a piston rod 9 and connected to a coupling unit 8. The coupling unit 8 is connected to a threaded nut 7, which is arranged non-rotatably with respect to the housing body 5 of the pulling and compression device 1, so that as a result of the rotational movement of the threaded spindle 6, the threaded nut 7 performs a linear movement along the longitudinal axis of the threaded spindle 6, which can be used to drive the tool holder designed as a piston rod 9.

[0034] In the embodiment example shown in FIG. 1, the threaded spindle 6 of the screw drive 4 is designed as a hollow shaft, within which a rotating shaft 23 extends coaxially. The rotating shaft 23 is connected non-rotatably to the drive unit 2, so that rotational movements generated by the drive unit 2 can be transmitted to corresponding tool devices 11 that can be connected to the connection section 10, independently of the adjustment travel of the threaded nut 7 on the threaded spindle 6. If the rotating shaft 23 is used to drive a tool device 11, the threaded spindle 6 is decoupled from the drive unit 2 on the pulling and compression device 1, so that only the rotating shaft 23 is set in rotation by the drive unit 2.

[0035] For the detachable connection of different tool devices 11 which are designed for connection to the coupling unit 8, the tool holder 9 and/or the rotating shaft 23, the connection section 10 of the housing body 5 of the pulling and compression device 1 has a quick coupling 12, which is shown in its unlocked position in FIG. 2 and in its locked position in FIG. 3.

[0036] The quick coupling 12 has an outer locking ring 14, a coupling ring 15 and ball latching bodies 16 arranged in openings 17, which together form a ball latching 13. The ball latching bodies 16 are arranged displaceably in the openings 17, the openings 17 being designed in such a way that in the locking position they project partially beyond the inner side 19 of the coupling ring 15, but the openings 17 being designed in such a way that the ball latching bodies 16 cannot be moved out of the openings 17 beyond the inner side 19.

[0037] In the unlocked position shown in FIG. 2, it is possible to displace the ball latching bodies 16 arranged in the locked position in the direction of the locking ring 14, whereby the ball latching bodies 16 are then displaced in corresponding recesses 18 on an inner side of the locking ring 14, so that the ball latching bodies 16 then no longer project beyond the inner side 19 of the coupling ring 15. In this position, it is then possible to arrange a tool device 11 adapted to the quick coupling 12 coaxially to the locking ring 14, or to remove an arranged tool device 11 from the connection section 10.

[0038] A tool device 11 arranged sectionally coaxially to the coupling ring 15 is secured in its position on the connection section 10 of the pulling and compression device 1 by a displacement of the locking ring 14 from the unlocked position shown in FIG. 2 to the locked position shown in FIG. 3, wherein the locking ring 14 then locks the ball latching bodies 16 in the locking position shown in FIG. 3, in which the ball latching bodies 16 protrude partially from the inner side 19 of the coupling ring 15 and produce a positive fit with a corresponding connecting section of the tool device 11 in the longitudinal axis direction of the pulling and compression device 1. For convenient adjustment, i.e. rotation of the locking ring 14 between the unlocked and locked positions by an operator, the locking ring 14 has a grip element 20. The quick coupling 12 offers the possibility of rotating the tool device 11 in the locked position about the longitudinal axis of the pulling and compression device 1.

LIST OF REFERENCE SYMBOLS

[0039] 1 Pulling and compression device [0040] 2 Drive unit [0041] 3 Electric motor [0042] 4 Screw drive [0043] 5 Housing body [0044] 6 Threaded spindle [0045] 7 Threaded nut [0046] 8 Coupling unit [0047] 9 Tool holder (piston rod) [0048] 10 Connection section [0049] 11 Tool device [0050] 12 Quick coupling [0051] 13 Ball latching [0052] 14 Locking ring [0053] 15 Coupling ring [0054] 16 Ball latching body [0055] 17 Opening [0056] 18 Recess [0057] 19 inner side (coupling ring) [0058] 20 Grip element [0059] 21 Control unit [0060] 22 Gear [0061] 23 Rotating shaft