HANDHELD PULL AND PUSH DEVICE

Description

[0001] The invention relates to a handheld pulling and pushing device for driving interchangeable tools, with a drive unit comprising a battery-powered electric motor, a threaded drive with a threaded spindle connected to the drive unit and rotatably mounted on a 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 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.

[0002] Handheld pulling and pushing devices, i.e., devices that can be used mobilized by one person, such as handheld 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 self-piercing rivets, which have a drive unit with an electrically driven threaded spindle of a screw drive, are known in various embodiments from the prior art. The screw drive converts the rotary motion of the electric motor into a linear motion of the pulling or pressing tool in a known manner. In the case of the setting process of a blind rivet element, for example, a mandrel of the blind rivet element is moved axially.

[0003] The riveting and pressing devices described above are used, for example, in automotive workshops for carrying out repairs on vehicle bodies and for maintenance work on pipe or cable connections. Depending on the work to be carried out, it is necessary to drive a variety of different interchangeable tools with the riveting and pressing devices. Even known handheld devices, such as those disclosed in DE 10 2021 131 294 A1, which discloses the preamble of claim 1 and which allow the operation of both drawing and pressing tools, have the disadvantage of limited connection and / or drive options for interchangeable tools. To improve the connection options, manually operated quick-release couplings are known, as described, for example, in EP 4 091 771 A1, DE 39 09 968 A1 and EP 2 551 529 A2.

[0004] Based on this, the invention aims to provide a handheld pulling and pushing device that can be used flexibly.

[0005] The invention solves the problem by means of a handheld pulling and pushing device with the features of claim 1. Advantageous further developments of the invention are specified in the dependent claims.

[0006] A characteristic feature of the handheld pulling and pushing device according to the invention is that the housing body of the handheld pulling and pushing device has a connection section for the detachable attachment of a tool device to the pulling and pushing device.

[0007] Tool fixtures are various components driven by a pull and push device, which may include, for example, devices for converting tensile and compressive forces or other types of adapters. If the handheld pull and push device is designed to also drive rotary tool fixtures, the tool fixture may, for example, be formed by an articulated device that allows the tool fixture to pivot relative to the pull and push device.

[0008] The inventive design of the housing body of the handheld pulling and pushing device, with a connection section for the detachable attachment of various tool devices to the pulling and pushing device, makes it possible, with a corresponding design of the tool device, to arrange it on the handheld pulling and pushing device according to the application. By providing a connection section, preferably a standardized one, it is thus possible to significantly increase the range of applications for the handheld pulling and pushing device, whereby a wide range of tasks can be performed using the handheld pulling and pushing device with the aid of different tool devices, particularly if, according to a further development of the invention, it is also designed to drive rotaryally operated tool devices.

[0009] According to the invention, the connection section has a quick-release coupling adjustable between a locking position and an unlocking position in order to fix the tool devices to the housing body of the handheld pulling and pushing device.

[0010] The use of a quick-release coupling is characterized by the fact that the operator can quickly and easily switch between the unlocked position, in which a tool can be attached to or removed from the connecting section, and the locked position, in which a tool is permanently fixed to the connecting section of the pull-and-push device. The quick-release coupling is particularly advantageous because it eliminates the need for additional tools to attach or remove the tools. Designing the handheld pull-and-push device with a quick-release coupling thus enables quick and convenient tool changes, as well as the mounting and dismounting of tools from the pull-and-push device.

[0011] According to the invention, the quick-release coupling can be adjusted between the unlocking and locking positions by means of an electric drive device.

[0012] The use of an electric drive for operating the quick-release coupling, i.e., for adjusting it between the unlocked and locked positions, significantly increases the ease of use of this handheld pull and push device. Furthermore, an electric drive minimizes or completely eliminates the risk of incorrect operation of the quick-release couplings.

[0013] Further operational safety can be enhanced by a further advantageous embodiment of the handheld pull and push device, whereby the quick-release coupling incorporates a sensor unit for status detection and a display unit connected to the sensor unit for signaling the status of the quick-release coupling. According to this embodiment of the invention, the sensor unit can detect the status of the quick-release coupling, i.e., in particular, it determines whether it is in the unlocked or locked position. The status detected by the sensor unit can then be displayed to an operator of the pull and push device via a display unit, which may, for example, be suitable indicator lamps, thereby further increasing operational safety.

[0014] According to a further embodiment of the invention, the sensor unit is also equipped with a communication unit for transmitting the status information to the drive unit. In this embodiment, the status of the quick-release coupling determined by the sensor unit is transmitted via the communication unit to the drive unit or to a control unit that controls the drive unit. With a corresponding design of the control unit, operation of the push-pull device can thus be blocked if the sensor unit has not signaled to the drive unit that the quick-release coupling is in a safe operating position.

[0015] The communication unit can be designed in any way to transmit sensor data to the drive unit; it can be designed for both wireless and wired data transmission, with the Bluetooth standard being preferred for wireless data transmission.

[0016] The design of the quick coupling can, in principle, be any way you like, provided that it allows for easy and quick adjustment between the unlocking and locking positions, thus enabling quick exchange, assembly, and disassembly of the tool devices.According to a further development of the invention, the quick coupling has a ball detent with a locking ring and a coupling ring having several openings, each with a ball detent element, wherein the locking ring arranged coaxially to the coupling ring, the coupling ring and the ball detent elements are coordinated such that in the locking position the ball detent elements are arranged section by section in the openings such that they protrude from an inner side of the coupling ring and are secured in this locked position by the locking ring, and in the unlocking position the ball detent elements can be moved into a release position.

[0017] A locking ring is understood to be a ring-shaped structure, preferably with a circular cross-section. For improved handling, it may, for example, have grip elements or a textured surface on its outer side. The coupling ring is also arranged coaxially with the locking ring and, like the locking ring, preferably has a circular cross-section.

[0018] The openings in the coupling ring are adapted to the shape of the ball detent elements. To prevent malfunctions caused by the ball detent elements sliding out of the openings, the openings are designed so that the balls cannot escape from the inside of the coupling rings. This can be achieved, for example, by a slightly conical shape to the openings. The openings are shaped so that they protrude from the inside of the coupling ring in the locked position. The locking ring is adjustable relative to the coupling ring so that, in the locked position, it secures the ball detent elements in the locked position, i.e., in the position where the ball detent elements protrude partially from the inside of the coupling ring.In the unlocked position, the locking ring allows the ball detent bodies to be moved into the release position, in which they can be moved into the openings to such an extent that they no longer protrude from the inside of the coupling ring.

[0019] A suitable design of the pull-and-push device thus allows a tool to be easily attached to the connecting section when the quick-release coupling is in the unlocked position. In this state, the ball detent elements are positioned in the openings so that they no longer protrude from the inside, allowing a tool to be positioned coaxially with the inside of the coupling ring. Subsequent adjustment of the quick-release coupling to the locked position causes the ball detent elements to shift inwards, so that they protrude from the inside section by section and engage with a corresponding connecting section on the tool, thus preventing any movement along the longitudinal axis of the pull-and-push device and reliably locking the tool to the pull-and-push device.Furthermore, the advanced design of the quick-release coupling with a ball detent allows the tool device to be rotated relative to the pulling and pushing device about its longitudinal axis.

[0020] To disassemble the tool device, it is only necessary to adjust the locking ring to the unlocking position, which allows the ball detent bodies to be moved into the openings so that they no longer protrude from the inside, thus enabling the tool device to be removed.

[0021] To increase operational reliability, a locking unit is provided according to a further development of the invention, which secures the locking ring in the locked position. The locking unit can, for example, be a preferably spring-loaded locking bolt, which locks the locking ring in the locked position, so that the locking ring can only be moved from the locked to the unlocked position after a corresponding displacement of the locking unit, e.g., the locking bolt. Malfunctions or incorrect operation of the pull and push device are thus additionally prevented.

[0022] According to a further embodiment of the invention, the locking ring is rotatable relative to the coupling ring between the locking and unlocking positions. A corresponding embodiment of the invention is characterized by the fact that this allows for a particularly small installation space and effectively prevents malfunctions of the quick-release coupling.

[0023] An embodiment of the invention is explained below with reference to the drawings. The drawings show: Fig. 1 in a sectional view shows a schematic representation of a pulling and pushing device with a tool device connected to a connecting section; Fig. 2 in a sectional view shows a schematic representation of a quick coupling in an unlocked position; and Fig. 3 in a sectional view shows a schematic representation of the quick coupling of Fig. 2 in a locked position.

[0024] Figure 1 Figure 1 shows a schematic representation of a handheld pulling and pushing device 1 with a tool device 11 connected to a connection section 10 of the housing body 5 of the pulling and pushing device 1.

[0025] The handheld pulling and pushing device 1 has a drive unit 2 with an electric motor 3 for driving a threaded spindle 6 of a screw drive 4, which can be controlled and regulated via a control unit 21. The drive unit 2 has an intermediate gearbox 22 for transmitting the rotary movements of the electric motor 3 to the threaded spindle 6.

[0026] The screw drive 4 converts the rotational movement of the threaded spindle 6, driven by the drive unit 2, 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 in a rotationally fixed manner relative to the housing body 5 of the tension and compression device 1. 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.

[0027] In the Figure 1In the illustrated embodiment, the threaded spindle 6 of the screw drive 4 is designed as a hollow shaft within which a rotary shaft 23 extends coaxially. The rotary shaft 23 is connected to the drive unit 2 in a rotationally fixed manner, so that rotary movements generated by the drive unit 2 can be transmitted to corresponding tool fixtures 11, which can be connected to the connection section 10, independently of the adjustment travel of the threaded nut 7 on the threaded spindle 6. When the rotary shaft 23 is used to drive a tool fixture 11, the threaded spindle 6 is decoupled from the drive unit 2 at the pull and push device 1, so that the rotary shaft 23 is set in rotation solely by the drive unit 2.

[0028] 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 rotary shaft 23, the connection section 10 of the housing body 5 of the pulling and pushing device 1 has a quick coupling 12, which in Figure 2 in their unlocked position and in Figure 3 shown in its locked position.

[0029] The quick-release coupling 12 has an outer locking ring 14, a coupling ring 15, and ball detent elements 16 arranged in openings 17, which together form a ball detent 13. The ball detent elements 16 are slidably arranged in the openings 17, the openings 17 being designed such that, in the locked position, they project section by section over the inner surface 19 of the coupling ring 15, but the openings 17 are designed such that the ball detent elements 16 cannot be moved out of the openings 17 over the inner surface 19.

[0030] In the Figure 2In the unlocked position shown, it is possible to move the ball detent elements 16, which are arranged in the locking position, towards the locking ring 14, whereby the ball detent elements 16 are then adjusted into corresponding recesses 18 on an inner surface of the locking ring 14, so that the ball detent elements 16 no longer protrude beyond the inner surface 19 of the coupling ring 15. In this position, it is then possible to position a tool device 11 adapted to the quick-release coupling 12 coaxially with the locking ring. 14 to arrange, or to remove an arranged tool device 11 from the connecting section 10.

[0031] A tool device 11 arranged sectionally coaxially to the coupling ring 15 is moved by a displacement of the locking ring. 14 from the in Figure 2 shown unlocking position in the Figure 3The locking position shown is secured in its position on the connecting section 10 of the pull and push device 1, whereby the locking ring is then 14 through its attachment to the ball detent bodies 16 these in the in Figure 3 The depicted locking position is engaged, in which the ball detent bodies 16 are section by section from the inside. 19 The coupling ring 15 protrudes and forms a positive connection with a corresponding connecting section of the tool device 11 in the longitudinal direction of the pulling and pushing 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 handle 20. The quick-release coupling 12 allows the tool device 11 to be rotated about the longitudinal axis of the pulling and pushing device 1 in the locked position. Reference symbol list

[0032] 1 Pull and push device 2 Drive unit 3 Electric motor 4 Threaded drive 5 Housing body 6 Threaded spindle 7 Threaded nut 8 Coupling unit 9 Tool holder (piston rod) 10 Connection section 11 Tool fixture 12 Quick coupling 13 Ball detent 14 Locking ring 15 Coupling ring 16 Ball detent body 17 Opening 18 Recess 19 Inside (coupling ring) 20 Handle element 21 Control unit 22 Gearbox 23 Rotary shaft

Claims

1. Hand-held pulling and compression device for driving interchangeable tools, with - a drive unit (2) comprising a battery-operated electric motor (3), - a screw drive (4) with a threaded spindle (6) connected to the drive unit (2) and mounted rotatably on a housing body (5), and a threaded nut (7) mounted rotatably on the threaded spindle (6) and non-rotatably on the housing body (5) via a bearing unit, and - a coupling unit (8) connected to a tool holder (9) for transmitting tensile and compressive forces resulting from the direction of rotation of the threaded spindle (6) from the threaded nut (7) to the tool holder (9), wherein the housing body (5) has a connection section (10) for detachable fixing of a tool device (11) to the pulling and compression device (1). characterized in that the connection section (10) has a quick coupling (12) which can be adjusted between a locked position and an unlocked position by means of an electric drive device.

2. Hand-held pulling and compression device according to claim 1, characterized in that the quick coupling (12) has a ball latching (13) with a locking ring (14) and a coupling ring (15) having a plurality of openings (17) each with a ball latching body (16), the coupling ring (14) arranged coaxially with the coupling ring (15) , the coupling ring (15) and the ball latching bodies (16) are matched to one another in such a way that in the locked position the ball latching bodies (16) are arranged in the openings (17) in such a way that they project partially from an inner side (19) of the coupling ring (15) and are secured by the locking ring (14) in a locked position and in the unlocked position the ball latching bodies (16) can be displaced into a release position.

3. Hand-held pulling and compression device according to claim 2, characterized by a locking unit fixing the locking ring (14) in the locked position.

4. Hand-held pulling and compression device according to claim 2 or 3, characterized in that the locking ring (14) is rotatable relative to the coupling ring (15) between the locked position and the unlocked position.

5. Hand-held pulling and compression device according to one or more of the preceding claims, characterized in that the quick coupling (12) has a sensor unit for detecting the status and a display unit connected to the sensor unit for indicating the detecting of the status.

6. Hand-held pulling and compression device according to claim 5, characterized by a communication unit for transmitting the detecting of the status to the drive unit (2).

7. Hand-held pulling and compression device according to one or more of the preceding claims, characterized in that the quick coupling (12) is electrically conductively connected to the drive unit (2).