deflection unit

Abstract

Deflection unit for an electro-mechanically driven hand-held pulling and pushing device (27), with - a base body (2) having a connecting section (5) for releasably securing the deflection unit (1, 1a) to a connecting section (6) of the pulling and pushing device (27) and a rotatably mounted drive shaft (7), - a swivel head (3) having a coupling section (8) for connecting a tool unit (9) and a rotatably mounted output shaft (10), which is connected to the base body (2) so as to be pivotable about a pivot axis (11), - a coupling unit (4) which is designed to transmit the rotary movement of the drive shaft (7) to the output shaft (10) independently of the position of the swivel head (3) relative to the base body (2), and - a locking unit (16) for fixing a pivoting position of the pivoting head (3) relative to the base body (2), characterized in that the locking unit (16) has a locking element carrier (17) which can be adjusted between a release position and a locking position and which has at least one locking element (18) which - in the locking position, in sections in correspondingly arranged locking element receptacles (19, 20) on the base body (2) and the swivel head (3) and - in the release position is arranged at least outside a locking element receptacle (19, 20) of the base body (2) and swivel head (3).

Description

The invention relates to a deflection unit for an electro-mechanically driven hand-held pulling and pressing device and to a hand-held pulling and pressing device for driving replaceable pulling and pressing tools, witha drive unit having an electric motor,a threaded drive having 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 rotatably mounted on the housing body via a bearing unit in a rotationally fixed manner, anda coupling unit connected to a tool holder, which is connected to the threaded nut in such a way that tensile and compressive forces resulting from the rotational direction of the threaded spindle are transmitted to the coupling unit.Manually lockable pulling and pressing devices, i.e. such devices that can be used by a person in a mobile manner, such as, for example, manually lockable, electric riveting and pressing devices for setting blind rivet elements, such as blind rivets and blind rivet nuts, or for carrying out punching processes and for setting self-piercing rivets, which have a drive unit with an electric motor-driven threaded spindle of a threaded drive, are known in various configurations from the prior art. In this case, a conversion of a rotational movement of the electric motor into a linear movement of the drawing or pressing tool takes place in a known manner via the screw drive. In the case of carrying out the setting process of a blind rivet element, a pulling pin of the blind rivet element is moved axially, for example.The riveting and pressing devices described above are used, for example, in motor vehicle workshops in the course of carrying out repair work on the body of vehicles and in the maintenance work of pipe or cable connections. Depending on the work to be carried out, it is necessary to drive a plurality of the most varied replaceable tools with the riveting and pressing devices. Even known hand-held devices which make possible both the operation of drawing tools and pressing tools have the disadvantage of limited connection and / or drive possibilities for replaceable tools.Deflection units for a joint wrench are already known from DE 10 2005 054 046 A1 and DE 103 18 563 A, in which the drive shaft and the output shaft are rotatably mounted in a transmission housing and can be pivoted with respect to one another over at least a pivot angle of 90°. Furthermore, DE 100 01 091 A1 discloses an electric hand tool in which a tool holder is coupled via a spindle to a drive shaft in a gear housing, wherein the gear housing is formed in two parts and the two parts of the gear housing are rotatable relative to one another in a rotation plane running obliquely to the drive shaft and the spindle and can be locked in the respectively desired rotation position.Proceeding from this, the object of the invention is to provide a deflection unit for an electro-mechanically driven hand-held pulling and pressing device and a hand-held pulling and pressing device which is reliably and flexibly suitable for driving replaceable tools.The invention achieves the object by a deflection unit having the features of claim 1 and by a hand-held pulling and pressing device having the features of claim 8. A further development of the hand-held pulling and pressing device is specified in claim 9.The deflection unit according to the invention for an electro-mechanically driven hand-held pulling and pressing device hasa base body having a connecting section for the detachable fixing of the deflection unit to a connecting section of the pulling and pressing device, and a rotatably mounted drive shaft,a swivel head having a coupling section for connecting a tool unit and a rotatably mounted output shaft,a coupling unit configured for transmitting the rotational movement of the drive shaft to the output shaft independently of the position of the swivel head with respect to the base body, anda locking unit for fixing a pivot position of the pivot head relative to the base bodywherein the swivel head is connected to the base body so as to be pivotable about a joint axis.The configuration of the base body with a connecting section makes it possible to fix the deflection unit in a fixed position on an electro-mechanically driven pulling and pressing device, so that tool units, for example a blind rivet nut tool, connected to the coupling section of the swivel head can be driven via the deflection unit.For driving the drive shaft of the swivel head, i.e. for generating a rotational movement of the output shaft driving the tool units, the drive shaft rotatably mounted on the base body is designed, for example, for a rotationally fixed connection to a threaded spindle of the pulling and pressing device, which is a component of a threaded drive drivable by means of a drive unit of the pulling and pressing device, by means of which rotational movements of an electric motor of the drive unit can be converted into a translatory movement of a tool holder, as a result of which pulling and pressing processes can be carried out by means of the pulling and pressing device.The present rotational movement of the threaded spindle of the pulling and pressing device can thus be used to drive the drive shaft, wherein the rotational movement of the drive shaft is converted into a rotational movement of the output shaft via the coupling unit of the deflection unit.Alternatively or additionally to a possibility of connecting the drive shaft to the threaded spindle of the pulling and pressing device, the drive shaft can also be designed to be connected in a rotationally fixed manner to a rotary shaft that can be driven by the drive unit of the pulling and pressing device. The possibility of connection to a rotation shaft of the pulling and pressing device exists if the pulling and pressing device has a threaded spindle designed as a hollow shaft, which enables the arrangement of a rotation shaft extending coaxially to the hollow shaft, which is coupled to the electric motor of the drive unit. In the case of deactivation of the threaded drive, it is thus possible to drive the drive shaft on the threaded spindle independently of the adjustment length of the threaded nut, so that the operation of tool units which can be connected to the swivel head is not limited by a rotational speed of the drive shaft which is limited by the adjustment length of the threaded nut.According to the invention, it is further provided that the swivel head is connected to the base body so as to be pivotable about a swivel axis. This enables a particularly flexible use of a tool unit connected to the swivel head, after the swivel head in connection with the tool unit can be brought into an optimum position on a workpiece to be machined by the swivel movement. In particular, the pivotability provided by the deflection unit enables the use of the pulling and pressing device for carrying out working processes in difficult-to-access areas.An increase in flexibility can be achieved if, according to a further embodiment of the invention, the connecting section of the base body is designed for connection to the connecting section of the pulling and pressing device, which connection can be rotated about the longitudinal axis of the drive shaft. According to this embodiment of the invention, the swivel head is thus pivotable relative to the base body about the swivel axis and the base body is additionally connected to the connecting section of the pulling and pressing device such that it can be rotated about the longitudinal axis of the drive shaft. A deflection unit developed in this way thus increases the possible uses of a pulling and pressing device equipped with such a deflection unit.The transmission of the rotational movement of the drive shaft to the output shaft driving the connectable tool units can in principle take place in any desired manner, for example by means of a universal joint or a flexible shaft section in the region between the drive shaft and the output shaft. According to an advantageous further development of the invention, however, it is provided that the coupling unit has a transmission bevel gear arranged rotatably about the joint axis, which is in engagement with a drive bevel gear arranged on an end of the drive shaft facing the joint axis and a driven bevel gear arranged on an end of the drive shaft facing the joint axis. A transmission of the rotational movement of the drive shaft to the output shaft via a corresponding bevel gear connection is distinguished in this case in that high torques can also be transmitted via the bevel gears in a particularly simple and reliable manner. At the same time, the use of bevel gears offers the possibility of converting a rotational movement of the drive shaft into a geared rotational movement of the drive shaft in a corresponding configuration of the bevel gears.The design of the pivotability, like the transmission of the rotational movement of the drive shaft to the output shaft, can basically be freely selected. According to an advantageous embodiment of the invention, however, it is provided that the base body and the swivel head are pivotably connected to one another via a swivel pin extending along the swivel axis, wherein the swivel pin is furthermore configured for rotatable mounting of the transmission bevel gear. This embodiment of the invention enables a particularly simple and compact construction of the coupling unit and thus of the entire deflection unit. The arrangement of the transmission bevel gear on the pivot axis enables a particularly simple configuration of the bevel gear connection, so that the deflection unit can be produced overall in a particularly simple and cost-effective and compact manner. The ability of the bevel gear to rotate about the pivot axis can be achieved here on the one hand by a rotatable mounting of the pivot bolt and also by a rotatable mounting of the bevel gear on the pivot bolt.According to the invention, the deflection unit further comprises a locking unit for fixing the swivel head in a set swivel position of the swivel head relative to the base body. This embodiment makes it possible to define a set angular position of the swivel head with respect to the base body, i.e. to lock the swivel head with respect to the base body in the set position, if this is required.According to the invention, it is provided that the locking unit has a locking element carrier, which can be adjusted between a release position and a locking position, with at least one locking element, which has a locking element.in the blocking position, sections of corresponding arranged blocking element receptacles on the base body and the swivel head, andin the release position at least outside a locking element receptacle of the base body and the swivel headis arranged.According to this embodiment, pivot head receptacles, for example in the form of bores, are arranged on the base body and the pivot head, which are aligned in predetermined angular positions of the pivot head with respect to the base body, so that the pivot head and the base body can be locked with respect to one another via a locking element extending through the aligned locking element receptacles. The number of angular positions in which the swivel head can be locked relative to the base body can thus be determined in a simple manner by means of the number of locking element receptacles on the base body and the swivel head. For pivoting the pivoting head relative to the base body, the locking unit can be adjusted into the release position in which the at least one locking element is at least not arranged in one of the locking element receptacles of the pivoting head and base body, so that the pivoting head can then be adjusted relative to the base carrier.The orientation of the blocking elements can basically be freely selected. According to a particularly advantageous embodiment of the invention, however, it is provided that the blocking element carrier has at least one blocking element which extends parallel to the pivot axis and which is adjustable in the pivot axis direction between the release position and the blocking position. This embodiment of the invention enables a particularly simple and compact embodiment of the locking unit. In the locked position, the locking element extends substantially perpendicular to the pivot direction of the pivot head relative to the base carrier, whereby a particularly reliable locking is achieved.It is particularly advantageously provided here that the blocking element carrier is arranged on the pivot pin, wherein the pivot pin is adjustable in the longitudinal axis direction between the blocking position and the release position. By means of this configuration, the locking unit can be adjusted between the blocking position and the release position by adjusting the pivot bolt, wherein the blocking elements extend parallel to the longitudinal axis of the pivot bolt on the blocking element carrier, which enables a particularly simple and compact configuration of the locking unit.According to a particularly advantageous embodiment, it is provided that the locking unit is prestressed in the direction of the blocking position, so that after a desired pivoting position of the pivoting head relative to the base body is reached, the locking unit is automatically adjusted into the blocking position.The invention also achieves the object by a hand-held pulling and pressing device for driving replaceable pulling and pressing toolsa drive unit having an electric motor,a threaded drive having 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 rotatably mounted on the housing body via a bearing unit in a rotationally fixed manner, anda coupling unit connected to a tool holder, which is connected to the threaded nut in such a way that tensile and compressive forces resulting from the rotational direction of the threaded spindle are transmitted to the coupling unit.A characteristic of the hand-held pulling and pressing device according to the invention is that it is detachably connected to a previously described, according to the invention or further developed deflection unit.The hand-held pulling and pressing device according to the invention, in addition to the drive of mechanically driven pulling and pressing tools, enables the drive of tool units via the deflection unit, which can be driven in rotation via the output shaft. The pivotability of the swivel head relative to the base body thereby enables an optimal adaptation and positioning of the tool unit during operation, so that the hand-held pulling and pressing device can be used particularly flexibly. If necessary, it is possible, by simply dismantling the deflection unit, to use the pulling and pressing device to carry out pulling and pressing work, the latter then driving mechanically driven pulling and pressing tools.The drive of the output shaft can be effected by a connection to the threaded spindle of the pulling and pressing device. According to an advantageous further development of the invention, it is provided that the threaded spindle is designed as a hollow spindle for receiving a rotary shaft connected to the drive unit and the drive shaft is designed for connection to the rotary shaft in a rotationally fixed manner.According to this embodiment of the invention, the configuration of the threaded spindle as a hollow spindle enables the arrangement of a rotary shaft coaxial to the hollow spindle and a direct connection of the rotary shaft to the drive unit, so that the rotary movement generated by the electric motor of the drive unit can be used via the rotary shaft to drive the drive shaft of the deflection unit.An embodiment of the invention will be explained below with reference to the drawings. In the drawings, there are shown: FIG. 1 shows a schematic illustration of a deflection unit with a locking unit arranged in a locking position in a sectional view; FIG. 2 shows a schematic illustration of a deflection unit with a locking unit arranged in a release position in a sectional view, and FIG. 3 is a sectional view of a schematic representation of a pulling and pressing device with a connectable deflection unit and a connectable tool unit.FIG. 1 shows a sectional view of an embodiment of a deflection unit 1 with a base body 2 and a swivel head 3. the base body 2 and the swivel head 3 are in this case connected to one another in an articulated manner via a swivel bolt 15 forming a swivel axis 11, wherein the swivel bolt 15 extends through corresponding openings 22, 23 on the swivel head 3 and the base body 2 in order to produce the swivelability of the swivel head 3 with respect to the base body 2. The swivel head 3 abuts in the contact region with the base body 2 on the outside on inner surfaces of a receiving section of the base body 2.The base body 2 has a drive shaft 7 rotatably mounted on a shaft bearing 21, which is connected in a rotationally fixed manner at its end facing the pivot bolt 15 to a drive bevel gear 13. In an analogous manner, the swivel head 3 has an output shaft 10 rotatably mounted on a shaft bearing 21, which for its part is connected in a rotationally fixed manner at its end facing the swivel bolt 15 to an output bevel gear 14.The input bevel gear 13 and the output bevel gear 14 together with a transmission bevel gear 12 rotatably arranged on the pivot bolt 15 form a coupling unit 4, by means of which rotational movements of the input shaft 7 are transmitted to the output shaft 10. The transmission of the rotational movement of the drive shaft 7 to the output shaft 10 takes place over the entire pivot range of the pivot head 3 relative to the base body 2.In order to fix a set pivot position of the pivot head 3 relative to the base body 2, the deflection unit 1 further comprises a locking unit 16. The locking unit 16 consists of a locking element carrier 17 arranged at one end of the swivel bolt 15, from which locking elements 18 extend parallel to the swivel bolt 15 in the direction of the base body 2 and the swivel head 3.In the release position of the locking unit 16 shown in FIG. 1, which is fixed on the base body 2 by a pivot bolt head 24 resting in a recess 25, the locking elements 18 are disengaged from locking element receptacles 19, 20 on the base body 2 and the pivot head 3. To define a set pivot position, the pivot bolt 15 is moved into the blocking position of the locking unit 16 shown in FIG. 2, in which the blocking elements 18 are arranged within the blocking element receptacles 19, 20 of the base body 2 and of the pivot head 3.For connection to a tool unit 9 shown by way of example in FIG. 3, the swivel head 3 has a coupling section 8 which ensures a reliable connection of the tool unit 9, which can then be connected to a pulling and pressing device 27 by means of the deflection unit 1 a.For connecting the deflection unit 1 ato the pulling and pressing device 27, the base body 2 has a connecting section 5, which makes it possible to arrange the base body 2 on a connecting section 6 of the pulling and pressing device 27 in such a way that it can be rotated about the longitudinal axis of the drive shaft 7. In the exemplary embodiment shown in FIG. 3, the drive of the drive shaft 7 is effected by connecting it to a rotary shaft 26 of the pulling and pressing device 27. the rotary shaft 26 extends here coaxially to a threaded spindle 30, which is formed as a hollow spindle and is part of a threaded drive 29, by means of which a rotary movement provided by a drive unit 28 having an electric motor 32 can be converted into a translatory movement of a coupling unit 34, which can be connected to a tool holder for arranging pulling and pressing tools.The transmission of the rotational movement of the drive unit 28 into a translatory movement is effected via a threaded nut 31 of the threaded drive 29, which is arranged in a rotationally fixed manner with respect to a housing body 36 of the pulling and pressing device 27, so that as a result of the rotational movement of the threaded spindle 30, the threaded nut 31 carries out a linear movement along the longitudinal axis of the threaded spindle 30, which can be used for driving the tool holders, not shown here.The possibility of connecting the drive shaft 7 to a rotary shaft 26 extending coaxially with the threaded spindle 30 makes it possible to transmit rotary movements generated by the drive unit 28 independently of the adjustment travel of the threaded nut 31 on the threaded spindle 30 to the output shaft 7 of the deflection unit 1 a, whereby a drive of tool units 9 connected to the deflection unit 1 ais possible in a reliable manner. The rotational movement of the drive unit 28 is generated by the electric motor 32, which is connected to the rotary shaft 26 via a gear 33, wherein the drive unit 28 can be controlled and regulated via a control unit 35.List of reference characters1, 1 a-deflection unit 2 main body 3 pivot head 4 coupling unit 5 connecting portion (main body) 6 connecting portion (tension and compression device) 7 drive shaft 8 coupling portion 9 tool unit 10 output shaft 11 pivot axis 12 transmission bevel gear 13 drive bevel gear 14 output bevel gear 15 pivot bolt 16 locking unit 17 locking element carrier 18 locking element 19 locking element receptacle (main body) 20 locking element receptacle (pivot head) 21 shaft bearing 22 opening 23 opening 24 pivot bolt head 25 recess 26 rotation shaft 27 tension and compression device 28 drive unit 29 screw drive 30 threaded spindle (hollow spindle) 31 threaded nut 32 electric motor 33 gear 34 coupling unit 35 control unit 36 housing body

Claims

Deflection unit for an electro-mechanically driven hand-held pulling and pressing device (27), having - a base body (2) which has a connecting section (5) for the releasable fixing of the deflection unit (1, 1a) to a connecting section (6) of the pulling and pressing device (27) and a rotatably mounted drive shaft (7), - a swivel head (3) which has a coupling section (8) for the connection of a tool unit (9) and a rotatably mounted output shaft (10) and is connected to the base body (2) such that it can swivel about a swivel axis (11), - a coupling unit (4) which is designed for a transmission of the rotational movement of the drive shaft (7) to the output shaft (10) which is independent of the position of the swivel head (3) with respect to the base body (2), and - a locking unit (16) for fixing a pivot position of the pivot head (3) relative to the base body (2), characterized in that the locking unit (16) has a locking element carrier (17), which can be adjusted between a release position and a locking position, with at least one locking element (18), which - in the locking position is arranged in sections in correspondingly arranged locking element receptacles (19, 20) on the base body (2) and the pivot head (3) and - in the release position is arranged at least outside a locking element receptacle (19, 20) of the base body (2) and pivot head (3).Deflection unit according to Claim 1, characterized in that the connecting section (4) is designed for connection to the connecting section (6) such that it can be rotated about the longitudinal axis of the drive shaft (7).Deflection unit according to Claim 1 or 2, characterized in that the coupling unit (8) has a transmission bevel gear (12) which is arranged rotatably about the pivot axis (11) and is in engagement with a drive bevel gear (13) arranged on an end of the drive shaft (7) facing the pivot axis (11) and with an output bevel gear (14) arranged on an end of the output shaft (10) facing the pivot axis (11).Deflecting unit according to one or more of the preceding claims, characterized in that the base body (2) and the swivel head (3) are pivotably connected via a swivel bolt (15) which extends along the swivel axis (11) and is designed for the rotatable mounting of the transmission bevel gear (12).Deflecting unit according to one or more of the preceding claims, characterized in that the blocking element carrier (17) has at least one blocking element (18) which extends parallel to the pivot axis (11) and is adjustable between the release position and the blocking position in the pivot axis direction.Deflecting unit according to one or more of the preceding claims, characterized in that the blocking element carrier (17) is arranged on the pivot pin (15), which is adjustable in the longitudinal axis direction between the blocking position and the release position.Deflecting unit according to one or more of the preceding claims, characterized in that the locking unit (16) is prestressed in the direction of the blocking position.Hand-held pulling and pressing device for driving replaceable pulling and pressing tools, having - a drive unit (28) having an electric motor (32), - a threaded drive (29) having a threaded spindle (30) connected to the drive unit (28) and mounted rotatably on a housing body (36), and a threaded nut (31) mounted rotatably on the threaded spindle (30) and mounted rotatably on the housing body (36) via a bearing unit, and - a coupling unit (34) connected to a tool holder, which coupling unit is connected to the threaded nut (31) in such a way that pulling and pressing forces resulting from the direction of rotation of the threaded spindle (30) are transmitted to the coupling unit (34), characterized bya deflection unit (1, 1a) according to one or more of Claims 1 to 7 which is detachably connected to the pulling and pressing device.Hand-held pulling and pressing device according to claim 8, characterised in that - the threaded spindle (30) is designed as a hollow spindle for receiving a rotary shaft (26) connected to the drive unit (28), and - the drive shaft (7) is designed for connection to the rotary shaft (26) in a rotationally fixed manner.

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