EP1920889A1 - Impact tool with pneumatic drive - Google Patents

Abstract

The impulse tool has an inertia trip device (5) which has at least one trip piston (8) which is movable relative to the drive rotor (3) for changing the air feed (6) between the open and closed positions, and an annular inertia component (9) which is co-rotatable by the drive rotor. By the inner contour of the inertia component, at least one drive component (11), which is radially adjustable relative to the drive rotor, can be deflected upon achieving the trip impulse. The drive component is movably connected to a release device (13), movable between a released and an arrested position, for the trip piston.

Description

The invention relates to a pulse tool, in particular a pulse wrench, with at least one pneumatic drive unit having a drive rotor, and with a pulse unit driven by this, wherein the drive unit is associated with a delay-dependent Trägheitsabschalteinrichtung to interrupt the air supply upon reaching a shutdown pulse.

Such a pulse tool is known from practice and is used for example for screwing. In such a screw, it has been found to be advantageous that the screw is up to a specified tightening torque. This is associated with a corresponding turn-off pulse, which is generated by the pulse unit. Upon application of this switch-off pulse, the inertia shut-off device detects a corresponding delay and causes an interruption of the air supply to the pneumatic drive unit, so that it no longer drives the pulse unit and accordingly no further pulses are generated.

Object of the present invention is to improve such a pulse tool to the effect that this has a compact design, low weight and at the same time a quick shutdown by the Trägheitsabschalteinrichtung or allows.

This object is solved by the features of patent claim 1.

According to the invention, the Trägheitsabschalteinrichtung at least one for changing the air supply between the open and closed positions relative to the drive rotor displaceable shut-off piston and a rotatable by the drive rotor, in particular annular inertia body. The shut-off is easy to move from the open to the closed position, wherein in the closed position, the air supply is completely or at least largely interrupted to the drive unit. The inertia body is rotated accordingly by the drive rotor. As soon as an impulse is set, further rotation of the inertial body relative to the drive body may occur due to the corresponding inertia of the inertial body.

The inertia body has an inner contour, by means of which at least one drive body, which is adjustable essentially radially relative to the drive rotor, can be deflected. Upon reaching the shutdown pulse and further rotation of the inertial body relative to the drive body is carried out according to the deflection of the drive body. This is motion-connected with a movable between a release and a retaining position release device for the shut-off. Depending on the radial adjustment of the drive body, the release device is correspondingly arranged in the region between release and retention position. In the release position, a release of the shut-off piston, so that it is displaceable from its opening into the closed position.

According to the invention, only a few parts are required for the Trägheitsabschalteinrichtung, which are preferably low in mass and cover only small ways to allow in particular a corresponding adjustment of the shut-off piston in its closed position. A simple arrangement of the shut-off piston relative to the drive unit can be seen therein when the shut-off piston is slidably mounted on a substantially cylindrical rotor extension of the drive rotor opposite to the pulse unit. As a result, the corresponding adjustment of the shut-off piston between closed and open position takes place directly along the rotor extension.

The tool can be made more compact, when the inertial body extends around the rotor extension and in particular is rotatably mounted at its free end.

An easily manufactured inertia body, which occupies relatively little space at the same time, is an inertia body with a substantially circular outer circumference and a polygonal inner circumference with a corresponding inner contour. Due to the polygonal inner circumference or the inner contour, a deflection of the drive body takes place during relative movement between the rotor extension and the inertia body.

The inner contour or inner circumference can be designed differently. As preferred, a substantially triangular and in particular equilateral inner circumference can be considered.

In order to be able to move the drive body well along the corresponding sides of the triangle to corresponding triangular tips, the corresponding sides of the triangle can be convexly curved.

In order to be able to arrange the drive body securely in the sides of the triangle, during the joint rotation of the inertia body and the rotor extension, the corresponding triangular tips can have convexly curved inner sides. In this case, this convex curvature correspond to the curvature of the drive body.

To be able to act on the corresponding body better and more evenly by drive body, a drive body of each triangle tip can be assigned. As a result, three drive bodies are moved in the form of spheres in accordance with reaching the turn-off in the direction of the body and adjust this to release the cut-off.

As a rule, a corresponding impulse tool is movable in both directions of rotation both for fastening and loosening a screw connection. In order to dispense with an automatic shutdown by the Trägheitsabschalteinrichtung when loosening the screw, the polygonal inner circumference may be asymmetrically relatively defined by the rotor extension axis of rotation. Drive balls are preferred as the drive body, since they do not require any specific assignment to the corresponding triangular tips.

In order to ensure a co-rotation of the inertial body during rotation of the rotor extension in a simple manner, this can have a driving device for the drive body to the deflection radially outward. That is to say, during the rotation of the rotor extension, the driving bodies move through the entrainment device into the triangular tips and in this way take the inertia body with it so that it rotates corresponding to the rotor extension or to the rotor of the drive unit.

A simple realization of such entrainment means can be seen therein if it has at least radial openings and an abutment body arranged in a longitudinal bore of the radial extension. In the radial openings, the drive body are mounted radially adjustable and are prevented from falling into the corresponding longitudinal bore of the rotor extension by the plant body.

In order to achieve a good contact between the contact body and the drive body, the contact body can be formed at least in the direction of the drive body spherical or conical.

Particularly preferred may be considered when the body part of the release device and is mounted adjustably in the longitudinal direction of the longitudinal bore. That that with radial adjustment of the drive body inwardly upon reaching the shutdown pulse, the drive body on the contact body to its adjustment in the longitudinal direction of the longitudinal bore press and so this allows as part of the release device an adjustment of the shutdown piston from its opening into its closed position. In order to press in this connection in a simple manner, the system body in particular before reaching the turn-off pulse against the drive body, the contact body can be pressurized in the direction of the drive body.

There is also the possibility that the shut-off piston is pressurized in the direction of the closed position, in particular by means of a piston compression spring. This results in the advantage that upon release of the shut-off piston, this is pressed directly by its piston compression spring in the closed position, and in particular no entrainment of the shut-off must be done by, for example, the plant body or other parts of the release device.

In order to keep it safe in its open position prior to release of the shutoff piston, the rotor extension may have at least one slot on the circumference, in each of which a locking body is slidably mounted, with one of the cutoff piston and from the other side slidable in the longitudinal bore mounted holding sleeve of the release device is in abutment. This retaining sleeve can be moved by moving the contact body in the longitudinal direction of the longitudinal bore, whereby the locking body can move along the elongated hole and moves according to the shut-off piston from the opening to the closed position.

In order to be able to securely hold the shut-off piston through the blocking body, in particular in the open position, the shut-off piston can have on its inside a receiving groove for the blocking body.

The investment of the retaining sleeve on the locking body can for example be made in such a way that the locking body is in contact with a free end of the retaining sleeve. If the holding sleeve is then displaced in the longitudinal direction of the longitudinal bore, the blocking body follows the free end along the oblong hole and correspondingly the cutoff piston with its receiving groove for the blocking body, so that it can be displaced out of its opening into its closed position in accordance with the displacement of the holding sleeve.

To load the retaining sleeve in a simple manner opposite to a corresponding adjustment by the contact body, the retaining sleeve can be pressurized within the longitudinal bore in the direction of locking body in particular by a compression spring.

In order to prevent the locking body in a simple manner from falling into the longitudinal bore of the rotor extension, a Abschalthülse may be disposed within the retaining sleeve and be in abutment with the plant body with a plant end. Shut-off sleeve and retaining sleeve are connected to motion, so that at the same time a displacement of the retaining sleeve takes place during an adjustment of the shut-off sleeve by the contact body. The pressurization of the retaining sleeve can simultaneously serve to pressurize the Abschaltthülse in the direction of contact body.

In particular, in this context, the locking body with an outer side of the retaining sleeve in abutment, whereby a falling into the lock body is prevented in the longitudinal bore.

Furthermore, can be regarded as favorable when a bolt is disposed within the Abschalthülse whose the drive unit zuweisendes first end is pressurized in the direction of plant body.

By such a bolt, in particular, the shutdown pulse can be adjusted, for example, by the bolt in the longitudinal bore to vary its pressurization is adjustable.

An advantageous embodiment can be seen therein, when the bolt is bolted directly to the shut-off sleeve for adjustment relative to this. In this case is the Abschalthülse with the plant body in Appendix, as described above, and by the connection with the bolt and the possibility of varying its pressurization results in accordance with a variation of the pressurization of the contact body by the Abschaltthülse.

A simple way of pressurizing the bolt can be seen therein, when a corresponding bolt pressure spring is optionally arranged with a collar bolt between this and the first end of the bolt. The bolt compression spring can be arranged, for example, between a closed end of the longitudinal bore of the rotor or the rotor extension and the bolt or the collar bolt.

In order to keep the shut-off piston in its open position at rest, a spring constant of the compression spring may be greater than a spring constant of the piston compression spring. In this way, there is no release of the shut-off piston by the release device without Trägheitsabschalteinrichtung.

In order to enable a sufficient sealing of the air supply in the direction of the drive unit, the shut-off piston can have a radially outwardly projecting closing flange. This is then in the closed position at corresponding air channels or the like within the pulse tool to the seal.

In the structure described above, in particular the Trägheitsabschalteinrichtung, it also proves to be advantageous if the inertial body is mounted floating. In other words, the inertia body is essentially supported and also driven during its rotation by the set bolt compression spring force on the contact body pressed radially outward and rotated by the driving device together with the rotor extension drive body.

Additional bearings for the inertial body are not necessary.

It may turn out to be advantageous in this context, if necessary, the drive body are laterally secured in the longitudinal direction by stops such as snap rings or the like.

In order to allow a simple adjustment for the bolt and thus a simple adjustment of the turn-off without having to remove a plurality of parts of the pulse tool, the contact body may have a substantially central longitudinal opening which is aligned with a plug-in recess in the bolt. By means of this longitudinal opening, a rotation of the screw bolt and thus an adjustment in the longitudinal direction can then take place via the insertion recess, as a result of which the pressurization by the bolt pressure spring can be varied.

In order to reduce in this context, no part of the housing of the pulse tool, the housing of the pulse tool may have an insertion for an adjustment, which can be inserted through this and then through the longitudinal opening of the contact body into the Einsteckvertiefung for rotating the bolt.

The corresponding insertion opening of the housing must normally be closable so that the appropriate air supply can take place under sufficient pressure within the housing. A simple way to close the insertion can be seen therein, if it has on its inside a sealing seat for sealing engagement of a particular spherical closing body. This closing body may for example be a rubber ball. By the appropriate adjustment of the closing body is removed from its sealing seat and then introduced the adjusting tool into the Einsteckvertiefungen in the housing. After adjustment of the bolt and removing the adjusting tool, the closing body is automatically pressed again in sealing engagement with its sealing seat when building an air pressure within the housing.

In order to prevent an automatic rotation of the bolt relative to the Abschalthülse, may be arranged between these a frictional engagement element in the form of, for example, a spring, an elastomeric pin or the like. Furthermore, the shut-off sleeve can be secured against rotation relative to the rotor extension as a reaction receptacle during rotation of the bolt via a spherical locking body.

In the following, an advantageous embodiment of the invention will be explained in more detail with reference to the accompanying drawings.

Fig. 1

eine seitliche prinzipielle Darstellung eines erfindungsgemäßen Impulswerkzeugs;

Fig. 2

einen Längsschnitt durch eine Antriebseinheit mit Trägheitsabschalteinrichtung für ein Impulswerkzeug nach Fig. 1,

Fig. 3

einen Schnitt entlang der Linie III-III aus Fig. 2 durch die Trägheitsabschalteinrichtung, und

Fig. 4

eine vergrößerte Darstellung eines Teils der Fig. 2

Show it:

Fig. 1

a lateral schematic representation of a pulse tool according to the invention;

Fig. 2

a longitudinal section through a drive unit with Trägheitsabschalteinrichtung for a pulse tool after Fig. 1 .

Fig. 3

a section along the line III-III Fig. 2 by the Trägheitsabschalteinrichtung, and

Fig. 4

an enlarged view of a portion of Fig. 2

Fig. 1 is a side view of a pulse tool 1 with a handle and a release button and with a pneumatic drive unit 2 in the form of an air motor and a pulse unit 4 is shown. The pulse unit 4 can be designed in a manner known per se as a single, double or multi-chamber impact unit. The drive unit 2 is also associated with a changeover button 54, by which the direction of rotation of the drive unit 2 is variable.

In Fig. 2 , see also Fig. 4 is a longitudinal section in particular by the drive unit 2 and an associated delay-dependent Trägheitsabschalteinrichtung 5 shown.

The drive unit 2 comprises at least one drive rotor 3, which is rotatable by corresponding air pressure within a motor cylinder 55. Air pressure is provided via an air supply 6, wherein upon actuation of the corresponding release button on the handle, see also Fig. 1 , the air supply takes place in the flow direction 53.

The rotor 3 is connected at its end facing the pulse unit 4 with a rotor extension 52 of the impact mechanism, so that in this way by the drive unit 2, the pulse unit 4 is driven.

The corresponding drive rotor 3 has, opposite to the pulse unit 4, a cylindrical rotor extension 14. These and also part of the drive rotor 3 are centered a longitudinal bore 24 in the longitudinal direction 25. Both the drive rotor 3 and the rotor extension 14 are rotatably supported via corresponding rotary bearings relative to the motor cylinder 55 or housing 45 of the pulse tool 1.

Within the longitudinal bore 24, some elements of the Trägheitsabschalteinrichtung 5 are arranged. A bolt pressure spring 39 serves to act on a collar bolt ( Fig. 4 ) or a pressure ball 40 (FIG. Fig. 2 ) within the longitudinal bore 24. This collar bolt 40 is disposed between the bolt compression spring 39 and a bolt 36. A first end 37 of the bolt 36 is shaped as a substantially cone-shaped centering and receiving for the collar bolt 40. The bolt 36 extends to its second end 38, which is associated with a contact body 23 via a shut-off sleeve 34. This contact body 23 has a spherical or possibly also conical outer surface. Centered in the contact body 23, a longitudinal opening 43 is arranged, which is aligned with a Einsteckvertiefung 44 at the second end 38 of the bolt 36. Einsteckvertiefung 44 has a hexagonal cross-section and is used for engagement of an adjusting tool which can be inserted from outside the pulse tool 1, as will be explained below.

The threaded bolt 36 is disposed in a Abschaltthülse 34 and adjustable relative to this, with a thread between the two is usually formed. To secure a specific relative rotational position between the screw bolt 36 and the shut-off sleeve 34, a frictional engagement element 50 in the form of an elastomeric pin, a spring or the like is provided. To prevent rotation of the Abschaltthülse is still at least one locking body 60 after Fig. 2 provided with the rotor extension as a reaction receptacle during rotation of the bolt 36th

The Abschelthülse 34 is with its free end 35 with the plant body 23 in Appendix, with a corresponding system between bolt 36 and contact body 23 is only present when the bolt 36 is unscrewed accordingly from the Abschaltthülse 34, wherein the axial end positions of the bolt 36 through Circlips 58, 59 after Fig. 2 are delimited on both sides of the internal thread of the Abschelthülse 34.

Thus, only an investment between the end of the system 35 of the shut-off sleeve 34 and the contact body 23th

The shut-off sleeve 34 is at least partially inserted into a holding sleeve 29, which also extends in the longitudinal direction 25 and within the longitudinal bore 24. The retaining sleeve 29 is with its free end 32 with at least one locking body 28 in ball shape in contact. At its other end, it is pressurized by a compression spring 33 in the direction of the plant body 23. This compression spring 33 is supported within the longitudinal bore 24 at a level and is supported approximately at the level of the collar bolt 40.

In the region of the spherical blocking body 28, the rotor extension 14 has at least one oblong hole 27, along which the blocking body 28 is displaceable in the direction of the collar bolt 40, depending on the displacement of the retaining sleeve 29. At the same time the locking body 28 abuts on an outer side of the Abschaltthülse 34, so that a falling in of the locking body 28 is prevented in the longitudinal bore 24.

In the area of blocking body 28 or slot 27, a shut-off piston 8 is arranged, which is mounted on the outside of the rotor extension 14 in the longitudinal direction 25 slidably. This shut-off piston 8 has approximately centrally a radially outwardly projecting locking flange 41 which rests upon displacement of the shut-off piston 8 in the direction of the drive unit 2 on an air distributor plate 56 for interrupting the air supply to the drive unit 2. On its inner side 30, the shut-off piston 8 has a receiving groove 31, in which the locking body 28 is partially received opposite to the shut-off sleeve 34.

Externally on the shut-off piston 8, a piston compression spring 26 is arranged for pressurizing the shut-off piston 8 in the direction of the drive unit 2. This has a spring constant less than the corresponding spring constant of the compression spring 33.

The contact body 23 is biased according to the pressurization by in particular the abutment end 35 of the Abschaltthülse 34 and its connection to the bolt 36 and its pressurization by bolt pressure spring 39 in the direction of contact body 49. On its spherical or conical outer side are one, two, three or more spherical drive body 11 at. These are additionally supported by the outer surfaces of the contact body 23 in radial openings 22 of the rotor extension 14.

By system body 23 and radial opening 22 a driving device 21 is formed for these drive body 11, so that upon rotation of the drive rotor 3 and corresponding to the rotor extension 14, the drive body 11 are carried. These projects at least partially from the radial openings 22 and abut against an inner contour 10 or on the inner circumference 17 of an inertia body 9 of the inertia shut-off device 5. In the illustrated embodiment, three drive body 11 are in use, see also Fig. 3 ,

The inertia body 9 extends annularly outside about the rotor extension 14 and is floatingly supported by the drive body 11 at the free end 15 of the rotor extension. Laterally, the drive body 11 are secured by stops 42, for example in the form of snap rings or the like. Laterally, the drive body are also secured by the radial openings 22 of the rotor extension.

One end of the rotor extension 14 is closed by a closure plate 57 having a central opening.

In Fig. 3 is a section taken along the line III-III Fig. 2 essentially represented only by the Trägheitsabschalteinrichtung 5. This has the annular inertia body 9 and arranged in this drive body 11 in spherical form. An outer periphery 16 of the inertial body 9 is circular and inner circumference 17 and inner contour 10 are polygonal. In the illustrated embodiment, the inner contour 10 is formed triangular and in particular equilateral. The corresponding triangle sides 18 are slightly convexly curved, as are corresponding triangular points 19, the curvature of which corresponds essentially to a corresponding external curvature of the drive body 11.

In particular, in Fig. 3 recognizable that the drive body 11 are mounted radially adjustable in the radial openings 22 of the rotor extension 14. Between the Antriebskörpem 11 of the contact body 23 is arranged with its spherical or conical outer surface. Centered in the body 23, the longitudinal opening 43 is arranged. This aligns with the corresponding insertion recess 44 or insertion opening 46 in the housing 45, see also Fig. 2 , On the inside of the insertion opening 46 of the housing 45, a sealing seat 48 is formed for a closing body 49, which is formed for example by a rubber ball or the like.

In Fig. 3 the drive body 11 are arranged in the triangular tips 19 and with the corresponding inner contour 10 in Appendix. This arrangement is at a rotation of the drive unit 2 and thus a corresponding rotation of the inertia body 9 with the rotor extension 14 before. The inner contour 10 after Fig. 3 is rotationally symmetrical with respect to the axis of rotation 20 is formed. There is also the possibility that the inner contour 10 is correspondingly asymmetrical in order not to use, for example, the inertia section device 5 with reverse rotation of the drive unit 2.

If the transmission of the switch-off pulse, which corresponds to a corresponding end torque for detecting a screw connection, occurs a further rotation of the inertia body 9 relative to the rotor extension 14. This further rotation leads to a movement of the drive body 11 radially inwardly in the direction of rotation axis 20. This is done by the corresponding inner contour 10 of the inertial body 9. The drive body 11 press on the spherical or conical surface of the contact body 23. This is due to the pressurization in Fig. 2 moved to the left in the direction of drive unit 2. In this movement is also moved in accordance with the Abschalthülse 34 in the same direction as the retaining sleeve 29 which is connected to the Abschaltthülse 34 motion. Together with the disconnect sleeve 34 moves in accordance with the bolt 36 against the pressurization by Bolzendruckfeder 39. The corresponding Abschaltimpuls is previously on an adjustment and insertion 46, longitudinal opening 43 and insertion recess 44 by corresponding rotation of the bolt 36 relative to the shut-off 34 and thereby changed pressurization by Bolzendruckfeder 39 has been adjusted.

When adjusting the retaining sleeve 29 against the pressurization by compression spring 33 can also be done an adjustment of the locking body 28 in the slot 27. According to this adjustment, a shift of the shut-off piston 8 due to the pressurization by piston pressure spring 26. With sufficient adjustment of the shut-off piston 8 is at least a reduction of the air supply to possibly the corresponding closing flange 21 abuts the air distribution plate 56. In Fig. 2 the release device formed from retaining sleeve, shut-off sleeve and bolt is arranged in its retaining position 12.

In this so-called closed position of the shut-off piston 8 there is no rotation of the drive unit 2 and thus not the pulse unit 4. As long as the release button on the handle, see Fig. 1 , is pressed by a worker, but is still the appropriate air pressure. Only when the worker lets go of the release button, no compressed air is applied and there is a provision of shut-off piston 8 and retaining sleeve 9 in particular due to the larger spring constant of the compression spring 39 in comparison to the piston compression spring 26th

A corresponding provision of the Abschaltthülse 34 and the contact body 23, whereby the drive body 11 are moved again in accordance with the triangular tips 19, see Fig. 3 , is always done immediately after release of the inertial body by the bolt pressure spring 39. That is, a reset of the inertial body is usually in its original position and then a reset of retaining sleeve 29, shut-off piston 8 and piston pressure spring 26 by means of locking balls 9, when the worker releases the trigger button ,

With regard to the shut-off piston 8 should be noted that this in the open position 7 after Fig. 2 or 4 is pressure-neutral and thus can not perform any movement in the closed position. This occurs only when the inertia cut-off device 5 operates accordingly, as described above. It should also be noted that the adjustment of the shut-off piston 8 must be done by the Trägheitsabschalteinrichtung 5 in the closed position only partially at a corresponding release by the release device 13, for example, a shift by 80 to 95 percent in the direction of the closed position may be sufficient. The final shutdown of the drive unit 2 can then take place due to the resulting pressure differences on the shut-off piston.

Claims (34)

Pulse tool (1), in particular impulse wrench, with at least one pneutmatischen drive unit (2) having a drive rotor (3), and with a pulse unit driven by the drive unit (4), wherein the drive unit (2) for interrupting the air supply upon reaching a Abschaltimpulses a delay-dependent Trägheitsabschalteinrichtung (5) is assigned,
characterized,
in that the inertia shut-off device (5) has at least one shut-off piston (8) displaceable relative to the drive rotor (3) for changing the air supply between open and closed positions (7) and a substantially annular inertia body (9) which can be rotated by the drive rotor (3) which on reaching the switch-off pulse by means of its inner contour (10) at least one substantially radially relative to the drive rotor (3) adjustable drive body (11) is deflectable, which drive body with a between a release and a retaining position (12) movable release device (13) for the shut-off piston (8) is movably connected, wherein the release device (13) by the drive body (11) in the release position for releasing the shut-off piston (8) for movement in the closed position is movable. Pulse tool according to claim 1, characterized in that the shut-off piston (8) on a substantially cylindrical rotor extension (14) of the drive rotor (3) opposite to the pulse unit (4) is displaceably mounted. Pulse tool according to claim 1 or 2, characterized in that the inertia body (9) extends around the rotor extension (14) and in particular at the free end (15) is rotatably mounted. Pulse tool according to one of the preceding claims, characterized in that the inertia body (9) has a substantially circular outer periphery (16) and a polygonal inner circumference (17). Pulse tool according to claim 4, characterized in that the inner circumference (17) is formed substantially triangular and in particular equilateral. Pulse tool according to claim 5, characterized in that the triangle sides (18) of the inner circumference are convexly curved. Pulse tool according to claim 5 or 6, characterized in that triangular tips (19) of the inner circumference (17) have convexly curved inner sides. Pulse tool according to one of the preceding claims, characterized in that a drive body (11) of each triangular tip (19) can be assigned. Pulse tool according to one of the preceding claims, characterized in that the polygonal inner circumference (17) is asymmetrical relative to a rotation axis (20), the rotor extension (14). Pulse tool according to one of the preceding claims, characterized in that the drive body (11) is a drive ball. Pulse tool according to one of the preceding claims, characterized in that the rotor extension (14) has a driving device (21) for the drive body (11) to the deflection radially outward. Pulse tool according to claim 11, characterized in that the entrainment device (21) has radial openings (22) in the rotor extension (14) and a bearing body (23) arranged in a longitudinal bore (24) of the rotor extension. Pulse tool according to claim 12, characterized in that the contact body (23) is at least in the direction of the drive body (11) spherical or conical. Pulse tool according to one of the preceding claims, characterized in that the abutment body (23) part of the release device (13) and in the longitudinal direction (25) of the longitudinal bore (24) is adjustably mounted. Pulse tool according to one of the preceding claims, characterized in that the contact body (23) is pressurized in the direction of the drive body (11). Pulse tool according to one of the preceding claims, characterized in that the cut-off piston (8) is pressurized in the direction of the closed position, in particular by means of a piston compression spring (26). Pulse tool according to one of the preceding claims, characterized in that the rotor extension has at least one slot (27) in which a blocking body (28) is displaceably mounted, with which from one side of the shut-off piston (8) and from the other side in the Longitudinal bore (24) slidably mounted retaining sleeve (29) is in abutment. Pulse tool according to one of the preceding claims, characterized in that the shut-off piston (8) on its inner side (3) has a receiving groove (31) for the locking body (28). Pulse tool according to one of the preceding claims, characterized in that the blocking body (28) with a free end (32) of the holding sleeve (29) in abutment. Pulse tool according to one of the preceding claims, characterized in that the retaining sleeve (29) within the longitudinal bore (24) in the direction of locking body (28) in particular by a compression spring (33) is pressurized. Pulse tool according to one of the preceding claims, characterized in that a Abschalthülse (34) at least partially disposed within the holding sleeve (29) and with a abutment end (35) with the contact body (23) in abutment. Pulse tool according to one of the preceding claims, characterized in that the blocking body (28) is in contact with an outer side of the shut-off sleeve (34). Pulse tool according to one of the preceding claims, characterized in that a screw bolt (36) is arranged inside the shut-off sleeve (34) whose first end (37) facing the drive unit (2) is pressurized in the direction of the contact body (23). Pulse tool according to one of the preceding claims, characterized in that the screw bolt (36) in the longitudinal bore (24) is adjustable to vary its pressurization. Pulse tool according to one of the preceding claims, characterized in that the screw bolt (36) with the shut-off sleeve (34) is screwed for adjustment relative to this. Pulse tool according to one of the preceding claims, characterized in that for pressurizing the bolt (36) a bolt pressure spring (39) with optionally a collar bolt (40) between this and the first end (37) of the bolt (36) is arranged. Pulse tool according to one of the preceding claims, characterized in that a spring constant of the compression spring (33) is greater than a spring constant of the piston compression spring (36). Pulse tool according to one of the preceding claims, characterized in that the shut-off piston (8) has a radially outwardly projecting locking flange (41). Pulse tool according to one of the preceding claims, characterized in that the inertial body (9) is mounted floating. Pulse tool according to one of the preceding claims, characterized in that the drive body (11) laterally in the longitudinal direction (25) by stops (22), such as snap rings or the like are additionally secured. Pulse tool according to one of the preceding claims, characterized in that the abutment body (23) has a substantially central longitudinal opening (43) which is aligned with a Einsteckvertiefung (44) in the screw bolt (36). Pulse tool according to one of the preceding claims, characterized in that a housing (45) of the pulse tool (1) has an insertion opening (46) for an adjusting, which through this insertion opening and through the longitudinal opening into the Einsteckvertiefung (44) for rotating the bolt (36) can be inserted. Impulse tool according to one of the preceding claims, characterized in that the insertion opening (46) on its inner side (47) has a sealing seat (48) for sealing engagement of a particular spherical closing body (49). Pulse tool according to one of the preceding claims, characterized in that a frictionally locking anti-rotation element (50) can be arranged between the screw bolt (36) and the shut-off sleeve (34).

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