Hand tool with a locking unit

Abstract

In a hand-held power tool with a tool holder (140) having an internal receptacle (211) for receiving an insert tool, and with a percussion mechanism for applying impact pulses to an insert tool (145) arranged in the internal receptacle, wherein a locking unit (160) is provided for locking the insert tool in the internal receptacle, said locking unit having a locking bolt (230) arranged at least approximately perpendicular to a longitudinal extent (102) of the internal receptacle, said locking bolt locking the insert tool in the internal receptacle in a locking position (200) and unlocking it in an unlocking position for removal from the internal receptacle, and wherein the locking bolt is connected in a rotationally fixed manner to an operating element (240),the operating element is locked in the locking position of the locking bolt in a blocking position (219) on the tool holder in a rotationally fixed manner and can be moved from the blocking position (219) into an intermediate position by being acted upon against a spring force by at least one spring element, wherein the locking bolt can be rotated from the locking position into the unlocking position by rotating the operating element in the intermediate position.

Description

State of the art

[0001] The present invention relates to a handheld power tool, in particular a demolition hammer, drill hammer, or chisel hammer, comprising a tool holder having an internal receptacle for receiving an insert tool, and comprising a percussion mechanism for applying impact pulses to an insert tool arranged in the internal receptacle. To lock the insert tool in the internal receptacle, a locking unit is provided which has a locking pin arranged at least approximately perpendicular to a longitudinal extent of the internal receptacle, which locks the insert tool in the internal receptacle in a locking position and unlocks it in an unlocking position for removal from the internal receptacle, wherein the locking pin is connected in a rotationally fixed manner to an operating element.

[0002] Such a handheld power tool, designed as a demolition hammer, is known from the prior art. The demolition hammer has a tool holder for receiving an insert tool and is equipped with a percussion mechanism for applying impact pulses to an insert tool arranged in the tool holder. To lock the insert tool in the internal holder, a locking unit is provided which has a locking pin arranged at least approximately perpendicular to a longitudinal extent of the internal holder. The locking pin is connected in a rotationally fixed manner to an operating element, locks the insert tool in a locking position in the internal holder, and unlocks the insert tool in an unlocking position for removal from the internal holder. Disclosure of the invention

[0003] The invention relates to a hand-held power tool, in particular a demolition hammer, drill hammer or chisel hammer, with a tool holder which has an internal receptacle for receiving an insert tool, and with an impact mechanism for applying impact pulses to an insert tool arranged in the internal receptacle, wherein a locking unit is provided for locking the insert tool in the internal receptacle, which locking unit has a locking bolt arranged at least approximately perpendicular to a longitudinal extent of the internal receptacle, which locks the insert tool in a locking position in the internal receptacle and unlocks it in an unlocking position for removal from the internal receptacle, and wherein the locking bolt is connected in a rotationally fixed manner to an operating element.In the locking position of the locking bolt, the operating element is locked in a blocking position on the tool holder in a rotationally fixed manner and can be moved from the blocking position into an intermediate position by being acted upon against a spring force of at least one spring element, wherein the locking bolt can be rotated from the locking position into the unlocking position by rotating the operating element in the intermediate position.

[0004] The invention thus enables the provision of a hand-held power tool with a locking unit in which the operating element, which can be arranged in an intermediate position, enables safe and reliable locking and unlocking of the locking bolt.

[0005] Preferably, the operating element extends parallel to a longitudinal extension of the tool holder in the blocking position.

[0006] This enables a space-saving and compact arrangement of the control element.

[0007] Preferably, the at least one spring element is designed as a disc spring, wherein the disc spring is arranged on the locking pin.

[0008] This enables a safe and reliable arrangement of at least one spring element.

[0009] The at least one spring element is preferably arranged at an end of the locking bolt facing away from the operating element and / or at an end of the locking bolt facing the operating element.

[0010] Thus, a suitable arrangement of the at least one spring element can be made possible in a simple manner.

[0011] According to one embodiment, the at least one spring element is formed integrally with the operating element.

[0012] This makes it easy and straightforward to provide an alternative spring element.

[0013] The operating element is preferably designed as a spring clip or as an elastomer clip.

[0014] This allows a safe and reliable spring element to be provided.

[0015] Preferably, the operating element designed as a spring clip has spring arms which can be acted upon towards one another to move the operating element from the blocking position into the intermediate position.

[0016] This means the control element can be designed simply and easily.

[0017] According to one embodiment, the operating element can be rotated about an axis of rotation which is oriented perpendicular to a longitudinal extension of the tool holder in order to move from the blocking position into the intermediate position.

[0018] This makes it easy to enable an alternative direction of movement of the control element.

[0019] Preferably, the tool holder has a blocking element with at least one receptacle and / or a contact edge for rotationally locking the operating element in the blocking position.

[0020] This enables safe and reliable blocking of the control element in the blocking position.

[0021] Preferably, at least one damping element for at least partially damping an action on the insert tool in an idle state of the hand-held power tool is assigned to the locking bolt, wherein the operating element has a receptacle in which the blocking element moves during damping in the idle state of the hand-held power tool.

[0022] This makes it easy and uncomplicated to at least partially dampen the insert tool. Short description of the drawings

[0023] The invention is explained in more detail in the following description using exemplary embodiments illustrated in the drawings. They show: Fig. 1 a perspective view of a hand-held power tool designed as a demolition hammer, for example, with a percussion unit and a locking unit associated with a tool holder, Fig. 2 a perspective view of a first side of the tool holder with the locking unit of Fig. 1, Fig. 3 a perspective view of a second side of the tool holder with the locking unit of Fig. 1, Fig. 4 a side view of the tool holder with the locking unit of Fig. 1 to Fig. 3, Fig. 5 a sectional view through the tool holder with the locking unit of Fig. 1 to Fig. 4, Fig. 6 a side view of the tool holder with the locking unit of Fig. 1 to Fig. 5 in a locking position and an associated control element in a blocking position, Fig. 7 a side view of the tool holder with the locking unit of Fig. 1 to Fig. 6 with the control element of Fig. 6 in an intermediate position, Fig. 8 a perspective view of the tool holder with the locking unit of Fig. 1 to Fig. 7 with an alternative control element, Fig. 9 a sectional view of the tool holder with the locking unit and the operating element of Fig. 8 in the intermediate position, Fig. 10 a sectional view of the tool holder with the locking unit and the operating element of Fig. 8 in the intermediate position, which compared to Fig. 9 is twisted in the circumferential direction, Fig. 11 a perspective view of the tool holder with the locking unit of Fig. 1 to Fig. 10 with another control element in the blocking position, Fig. 12 a perspective view of the tool holder with the locking unit and the operating element of Fig. 11 in the intermediate position, Fig. 13 an enlarged section of the tool holder with the locking unit and the operating element of Fig. 11 and Fig. 12 in the intermediate position, Fig. 14 a sectional view of the tool holder with the locking unit and the operating element of Fig. 11 to Fig. 13 in the intermediate position, Fig. 15 a perspective view of the tool holder with the locking unit of Fig. 1 to Fig. 14 with an alternative control element, Fig. 16 a sectional view of the tool holder with the locking unit of Fig. 15 in the locking position, Fig. 17 an enlarged section of the tool holder with the locking unit of Fig. 15 and Fig. 16 in the locking position, Fig. 18 a side view of the tool holder with the locking unit and the operating element of Fig. 15 to Fig. 17 in the intermediate position, Fig. 19 a perspective view of the tool holder with the locking unit of Fig. 1 to Fig. 18 with an operating element according to a further embodiment, and Fig. 20 a sectional view of the tool holder with the locking unit of Fig. 19 in the locking position. Description of the embodiments

[0024] In the figures, elements with the same or comparable function are provided with identical reference symbols and are described in detail only once.

[0025] Fig. 1 shows a handheld power tool 100, embodied, for example, as a demolition hammer, with a percussion unit 150 and a tool holder 140 designed to receive an insert tool 145, in particular a chisel insert tool. A locking unit 160 for locking the insert tool 145 in the tool holder 140 is assigned to the tool holder 140. Furthermore, the handheld power tool 100 illustratively has a main handle 117 and, for example, an auxiliary handle 116, via which the handheld power tool 100 can be held and guided by an operator. The main handle 117 is illustratively U-shaped. The auxiliary handle 116 is also illustratively U-shaped.

[0026] The handheld power tool 100 further comprises a housing 110 in which a drive motor 120 is arranged. An optional motor housing 125 is preferably associated with the drive motor 120, which is illustratively arranged in the housing 110. The drive motor 120 is designed to drive the tool holder 140 or the insert tool 145 arranged therein.

[0027] Furthermore, the drive motor 120 is preferably configured to drive the impact mechanism unit 150. An impact mechanism housing 155 is illustratively associated with the impact mechanism unit 150. The impact mechanism housing 155 preferably has a piston guide element for guiding at least one piston element along a longitudinal extension 102 of the impact mechanism housing 155 in at least one operating state, preferably an impact mode of the handheld power tool 100.

[0028] It should be noted that the present invention is not limited to a demolition hammer. The handheld power tool 100 can alternatively be designed, for example, as a hammer drill and / or chipping hammer.

[0029] Fig. 2 shows the tool holder 140 with an exemplary locking unit 160 of the hand-held power tool 100 of Fig. 1. The tool holder 140 is preferably provided with a flange 205 for mounting on the housing 110 of Fig. 1. Furthermore, the tool holder 140 has an internal receptacle 211 for receiving the insert tool 145 of Fig. 1. The Schlagwerk 150 from Fig. 1 is for applying the insert tool 145 arranged in the inner receptacle 211 of Fig. 1 formed with impact impulses.

[0030] The locking unit 160 preferably has a locking pin 230 arranged at least approximately perpendicular to the longitudinal extent 102 of the tool holder 140 or the inner receptacle 211, illustratively along a transverse direction 204. The locking pin 230 is mounted in two, preferably rectangular, receiving blocks 213, 214 arranged laterally of the tool holder 140. A receiving block 213 is arranged on a first side 201 of the locking unit 160, and a receiving block 214 is arranged opposite on a second side 202 of the locking unit 160. Fig. 2 illustrates the first side 201, on which an operating element 240 associated with the locking unit 160 is arranged.

[0031] The locking pin 230 locks the insert tool 145 arranged in the internal receptacle 211 in a locking position 200 and unlocks it in an unlocking position for removal from the internal receptacle 211. The locking pin 230 is connected to the operating element 240 in a rotationally fixed manner. In the locking position 200 of the locking pin 230, the operating element 240 is rotationally fixedly locked in a blocking position 219 on the tool holder 140. Preferably, the operating element 240 extends parallel to the longitudinal extension 102 of the tool holder 140 in the blocking position 219.

[0032] By applying a force against the spring force of at least one spring element (340 in Fig. 3) the operating element 240 is moved from the blocking position 219 to an intermediate position (700 in Fig. 7). Preferably, the operating element 240 moves along an arrow 298 or pivots around a rotation axis 289. The locking pin 230 is thereby locked in the intermediate position (700 in Fig. 7) can be rotated in the circumferential direction 299 of the locking pin 230 from the locking position 200 to the unlocking position.

[0033] The receiving block 213 has an internal receptacle 221. The internal receptacle 221 is illustratively closed by a cover 225. Furthermore, a sleeve 260 is assigned to the locking pin 230 on the first side 201. The sleeve 260 has an internal receptacle 263 for receiving the locking pin 230.

[0034] Furthermore, the sleeve 260 has an illustrative lower and upper flattened side 261, 262. The operating element 240 preferably has a web 241, 243 assigned to the lower and upper sides 261, 262 of the sleeve 260. The two webs 241, 243 are preferably connected to one another via a web 245 and form a receptacle 244. The sleeve 260 is received in the receptacle 244. Furthermore, the operating element 240 has a recess 246 on each of its webs 241, 243, and the sleeve 260 and the locking pin 230 have associated recesses, wherein a locking pin 270 for connecting the operating element 240, the sleeve 260, and the locking pin 230 is arranged in the recesses. The locking pin 270 preferably forms the rotation axis 289 about which the operating element 240 can be pivoted along the arrow 298.

[0035] In addition, the operating element 240 has a grip section 247 which is arranged on the web 245. Preferably, the web 245 forms a rectangular receptacle 242 with the grip section 247. Illustratively, a blocking element 250 associated with the tool holder 140 is arranged within the receptacle 242. The blocking element 250 is designed for the rotationally fixed blocking of the operating element 240 in the blocking position 219. With a damping in the idle state of the hand-held power tool 100 of Fig. 1, the blocking element 250 moves within the receptacle 242 along the longitudinal extension 102, whereby the locking unit 160 remains in the locking position 200.

[0036] Fig. 3 shows the tool holder 140 with the locking unit 160 of Fig. 2 viewed from the second page 202. This illustrates Fig. 3 the receiving block 214 with its inner receptacle 321. Analogous to the inner receptacle 221, the inner receptacle 321 is closed by a cover 325.

[0037] Preferably, at least one spring element 340 is provided. According to one embodiment, the at least one spring element 340 is arranged on the locking pin 230. In this case, the at least one spring element 340 is preferably designed as a disc spring. Illustratively, the at least one spring element 340 is arranged at an end of the locking pin 230 facing away from the operating element 240. For this purpose, the locking pin 230 has a circumferential collar 331 which forms a contact edge 332. The circumferential collar 331 has a larger diameter than the locking pin 230. The at least one spring element 340 abuts the contact edge 332 in the transverse direction 204. Illustratively, the spring element 340 designed as a disc spring is arranged in the transverse direction 204 between the contact edge 332 and the cover 325. Alternatively or optionally, the at least one spring element 340 is arranged at an end of the locking bolt 230 facing the operating element.

[0038] Fig. 4 shows the tool holder 140 with the locking unit 160 in the locking position 200 and the blocking position 219 of the operating element 240. To rotationally lock the operating element 240 in the blocking position 219, the blocking element 250 has at least one, illustratively two, contact edges 411, 412. The holder 242 of the operating element 250 rests against the contact edges 411, 412, thereby preventing rotation of the operating element 250.

[0039] Fig. 5 shows the tool holder 140 with the locking unit 160 of Fig. 2 to Fig. 4 in the locking position 200 and the blocking position 219 of the control element 240. Fig. 5 on the first side 201 a recess 511 in the locking bolt 230 for arranging the locking pin 270. According to one embodiment, the spring element 340 is arranged at an end of the locking bolt 230 facing away from the operating element 240. Here, Fig. 5 on the second side 202, the formation of the circumferential collar 331 with the contact edge 332 of the locking pin 230, against which the spring element 340 rests. Preferably, a disk 520 is arranged in the transverse direction 204 between the spring element 340 and the cover 325. In addition, Fig. 5 a recess 519 formed in the area of ​​the inner receptacle 211 of the tool holder 140. The recess 519 in the unlocking position provides an insert tool arranged in the inner receptacle 211, e.g. the insert tool 145 of Fig. 1, free for removal from the interior shot 211.

[0040] According to one embodiment, the locking pin 230 is assigned at least one damping element 530, 540 for at least partially dampening the impact on the insert tool 145 in an idle state of the hand-held power tool 100. Illustratively, the internal receptacles 221, 321 widen in the transverse direction 204 toward the internal receptacle 211 into an internal receptacle 532, 542. Illustratively, two damping elements 530, 540 are shown, with one damping element 530 being arranged in the internal receptacle 532 and one damping element 540 being arranged in the internal receptacle 542. The internal receptacles 532, 542 are not connected to the internal receptacle 211.

[0041] With a damping in the idle state of the hand tool 100 of Fig. 1, the blocking element 250 moves due to the damping along the longitudinal extension 102 in the receptacle 242 of the operating element 240.

[0042] Fig. 6 shows the tool holder 140 and the locking unit 160 of Fig. 2 to Fig. 5 in the locking position 200 and the blocking position 219 of the control element 240. Fig. 6 a rounding 610 of the operating element 240. The rounding 610 is formed along the longitudinal extent 102 on an edge 611 facing the cover 225.

[0043] Fig. 7 shows the tool holder 140 and the locking unit 160 of Fig. 6 in an intermediate position 700 of the operating element 240. To arrange the operating element 240 in the intermediate position 700, the operating element 240 is rotated along the arrow 298 about the axis of rotation 289, whereby the rounding 610 of the operating element 240 pushes the locking pin 230 against the spring force of the spring element 340 from Fig. 3 and Fig. 5 along an arrow 702 to the first side 201 in the transverse direction 204 of Fig. 5. This creates a gap 720 between the cover 225 and the sleeve 260. In the intermediate position 700, the operating element 240 can be rotated in the circumferential direction 299, whereby the locking pin 230 is also rotated and an insert tool 145 arranged in the inner receptacle 211 of Fig. 1 is released for withdrawal.

[0044] Fig. 8 shows the tool holder 140 and the locking unit 160 of Fig. 1 to 7 with an alternative operating element 840. The operating element 840 has a cylindrical section 841 arranged on an outer circumference of the locking pin 230. On an end face facing the first side 201, the operating element 840 has at least two radially outwardly extending blocking parts 842, 846. The blocking parts 842, 846 have a larger diameter than the cylindrical section 841. Five blocking parts 842, 846 are shown illustratively, wherein the blocking parts 842, 846 are connected to one another in the circumferential direction 299. A gap 843 is formed in the circumferential direction 299 between two adjacent blocking parts 842, 846. A blocking element 844 assigned to the gap 843 is arranged offset in the transverse direction 204 toward the second side 202. The blocking element 844 is in contact with the blocking element 250. Furthermore, the operating element 840, orThe cylindrical portion 841 is assigned a cover 848, which is arranged in an internal receptacle 849 of the cylindrical portion 841. Preferably, a disk 810 is arranged in the transverse direction 204 between the operating element 240 and the cover 225.

[0045] To move the control element 840 from the blocking position 219 to the intermediate position 700 in Fig. 10, the operating element 840 is moved at the blocking parts 842, 846 in the transverse direction 204 away from the cover 225 against the spring force of a spring element (911 in Fig. 9). To move the locking unit 160 into the unlocking position, the operating element 840 can be in the intermediate position 700 in Fig. 10 together with the locking bolt 230.

[0046] Fig. 9 shows the tool holder 140 with the locking unit 160 and the operating element 840 of Fig. 8 in the locking position 200. The operating element 840 is arranged on an outer circumference of the locking pin 230. A spring element 911 is arranged in the inner receptacle 849 of the cylindrical portion 841. The spring element 911 rests against the cover 848 in the region of the first side 201, with the cover 848 being fixed in position via a disk 920 on the outer circumference of the locking pin 230.

[0047] Fig. 10 shows the tool holder 140 with the locking unit 160 and the operating element 840 of Fig. 8 and Fig. 9 in the intermediate position 700 of the operating element 840. Here, the operating element 840 was fixed to the blocking parts 842, 846 in Fig. 8 in the direction of arrow 1001, away from the cover 225, counter to the spring force of the spring element 911. The spring element 911 was compressed, and the operating element 840, or the cylindrical section 841 with the blocking parts 842, 846, was moved away from the cover 225, or the disc 810, so that the gap 720 was formed between the disc 810 and the operating element 840. In the intermediate position 700, the locking pin 230 can be rotated to move it into the unlocked position.

[0048] Fig. 11 shows the tool holder 140 and the locking unit 160 of Fig. 1 to Fig. 10 with an alternative operating element 1140. The operating element 1140 is preferably formed integrally with the at least one spring element 340. In Fig. 11, the operating element 1140 with the spring element 340 is designed as a spring clip with two spring arms 1141, 1142. In the Fig. In the blocking position 219 of the operating element 1140 shown in Figure 11, the blocking element 250 blocks the operating element 1140. The blocking element 250 has receptacles 1151, 1152 for receiving the spring arms 1141, 1142. The illustrative upper spring arm 1141 is arranged in the receptacle 1151, and the illustrative lower spring arm 1142 is arranged in the receptacle 1152.

[0049] To move the control element 240 from the blocking position 219 to the intermediate position 700 in Fig. 12, the spring arms 1141, 1142 can be biased toward each other. Here, the spring arm 1141 is biased in the direction of arrow 1102, and the spring arm 1142 is biased in the direction of arrow 1103.

[0050] In addition, the locking pin 230 has a peripheral collar 1162 which forms a contact edge 1164. The disc 810 of Fig. 8 is arranged along the transverse direction 204 between the contact edge 1164 and the cover 225.

[0051] Fig. 12 shows the tool holder 140 and the locking unit 160 with the operating element 1140 of Fig. 11 in the intermediate position 700. By applying pressure to the spring arms 1141, 1142 towards each other, the spring arms 1141, 1142 are moved out of the receptacles 1151, 1152 of the blocking element 250. Illustratively, the spring arms 1141, 1142 are moved in the direction of the arrow 298 from the blocking position 219 into Fig. 11 is arranged rotated. To arrange the locking pin 230 in the unlocking position, the locking pin 230 can be rotated by the operating element 1140 from the shown intermediate position 700 in the circumferential direction 299.

[0052] Fig. 13 shows the tool holder 140 and the locking unit 160 with the operating element 1140 of Fig. 11 and Fig. 12 in the intermediate position 700 and illustrates the receptacles 1151, 1152 of the blocking element 250. In the blocking position 219 (cf. Fig. 11) of the operating element 1140, the spring arms 1141, 1142 are arranged in the receptacles 1151, 1152, whereby a rotation of the operating element 1140 into the intermediate position 700 and a rotation of the locking pin 230 into the unlocking position is reliably prevented.

[0053] Fig. 14 shows the tool holder 140 and the locking unit 160 with the operating element 1140 of Fig. 11 to Fig. 13 in the intermediate position 700. This illustrates Fig. 14 shows the circumferential collar 1162 of the locking pin 230 formed on the first side 201, which arranges the cover 225 in the internal receptacle 221 via the washer 810. On the second side 202, the locking pin 230 has a locking washer 1410 arranged in a receptacle 1411 of the locking pin 230. The locking washer 1410 forms the contact edge 332. Along the transverse direction 204, the washer 520 is arranged between the cover 325 and the contact edge 332 of the locking washer 1410. The locking washer 1410 positions the washer 520 such that the cover 325 is arranged in the internal receptacle 321.

[0054] Fig. 15 shows the tool holder 140 and the locking unit 160 of Fig. 1 to Fig. 14 with an alternative operating element 1540. The operating element 1540 has a section 1545, which is arranged on an outer circumference of the locking pin 230, and an operating section 1541. The operating section 1541 has a recess 1542, in which the blocking element 250 is arranged in the blocking position 219 of the operating element 1540. Furthermore, the locking pin 230 has a receptacle (1661 in Fig. 16) for receiving a locking washer 1562. The locking washer 1562 forms a contact edge 1564. In the transverse direction 204, a spring element 1510 is arranged between the section 1545 of the operating element 1540 and the locking washer 1562. The spring element 1510 is preferably designed as a disc spring. The section 1545 of the operating element 1540 is arranged along the transverse direction 204 between the cover 225 and the spring element 1510. To arrange the operating element 1540 in the intermediate position 700, the operating element 1540 is pivoted on the operating section 1541 in the direction of arrow 298.

[0055] Fig. 16 shows the tool holder 140 and the locking unit 160 with the operating element 1540 of Fig. 15 in the locking position 200. This illustrates Fig. 16 a receptacle 1661 of the locking bolt 230 for receiving the locking washer 1562.

[0056] Furthermore, Fig. 16 a recess 1620 associated with section 1545 of operating element 1540 for arrangement on an outer circumference of locking pin 230. At the opposite end, locking pin 230 has circumferential collar 331 with contact edge 332. Spring element 340 and another optional spring element 1640 are arranged along transverse direction 204 between contact edge 332 and disc 520. Spring elements 340, 1640 are preferably designed as disc springs.

[0057] When the operating section 1541 is pivoted in the direction of arrow 298, or into the intermediate position 700, the spring elements 1510, 340, 1640 are compressed and the locking pin 230 is moved toward the first side 201. The locking pin 230 can then be rotated circumferentially to position it in the unlocking position.

[0058] Fig. 17 shows the locking unit 160 with the operating element 1540 of Fig. 15 and Fig. 16 in the locking position 200 and the blocking position 219 of the control element 1540. Fig. 17 shows the recess 1620 of section 1545 of the operating element 1540 on the outer circumference of the locking pin 230. The locking pin 230 preferably has two opposing flattened portions 1711, 1712. The recess 1620 has a contour associated with the locking pin 230. The flattened portions 1711, 1712 and the associated recess 1620 can form a positive connection for the joint rotation of the locking pin 230 and the operating element 1540.

[0059] Fig. 18 shows the locking unit 160 with the operating element 1540 of Fig. 15 to Fig. 17 in the intermediate position 700. The section 1545 of the operating element 1540 has an edge 1811 that is arranged facing away from the operating section 1541 of the operating element 1540. The edge 1811 forms a rotation axis 1810 in the intermediate position 700.

[0060] Fig. 19 shows the tool holder 140 and the locking unit 160 of Fig. 1 to Fig. 18 with an alternative operating element 1940. The operating element 1940 is designed as an elastomer bracket. The operating element 1940 has two webs 1943, 1945, which are connected to one another via a connecting web 1948. An operating section 1949 is preferably assigned to the connecting web 1948. At their free end, the webs 1943, 1945 each have a connecting sleeve 1942, 1944, each with an internal receptacle 1921. The internal receptacles 1921 are connected to a transverse web 1910 assigned to the locking pin 230 and form a positive connection with the transverse web 1910. The transverse web 1910 forms a rotation axis.

[0061] In the blocking position 219 of the operating element 1940, the connecting web 1948 rests against a side 1999 of the blocking element 250 facing away from the inner receptacle 211 of the tool holder 140. To arrange the operating element 1940 in the intermediate position 700, the operating element 1940 is stretched on the operating section 1949 away from the inner receptacle 211 or in the direction of an arrow 1901 in order to release a positive connection between the blocking element 250 and the operating element 1940, and is then rotated in the direction of arrow 298 about the axis of rotation formed by the transverse web 1910. To arrange it in the unlocking position, the locking pin 230 is rotated by rotating the operating element 1940 in the circumferential direction 299.

[0062] Fig. 20 shows the tool holder 140 and the locking unit 160 with the operating element 1940 of Fig.19 in the blocking position 219 of the operating element 1940. In the blocking position 219, the blocking element 250 and the operating element 1940 or the connecting web 1948 form a positive connection.

Claims

[1] Hand tool (100), in particular a demolition hammer, drill hammer or chisel hammer, with a tool holder (140) which has an inner receptacle (211) for receiving an insert tool (145), and with a percussion mechanism (150) for applying impact pulses to an insert tool (145) arranged in the inner receptacle (211), wherein a locking unit (160) is provided for locking the insert tool (145) in the inner receptacle (211), which locking unit has a locking bolt (230) arranged at least approximately perpendicular to a longitudinal extent (102) of the inner receptacle (211), which locks the insert tool (145) in a locking position (200) in the inner receptacle (211) and unlocks it in an unlocking position for removal from the inner receptacle (211), and wherein the locking bolt (230) is connected in a rotationally fixed manner to an operating element (240) is connected, characterized byin that the operating element (240) is blocked in a blocking position (219) on the tool holder (140) in a rotationally fixed manner in the locking position (200) of the locking bolt (230) and can be moved from the blocking position (219) into an intermediate position (700) by being acted upon against a spring force by at least one spring element (340), wherein the locking bolt (230) can be rotated from the locking position (200) into the unlocking position by rotating the operating element (240) in the intermediate position (700). [2] Hand tool according to claim 1, characterized by that the operating element (240) extends in the blocking position (219) parallel to a longitudinal extension (102) of the tool holder (140). [3] Hand tool according to claim 1 or 2, characterized by that the at least one spring element (340) is designed as a disc spring, wherein the disc spring is arranged on the locking pin (230). [4] Hand tool according to one of the preceding claims, characterized by that the at least one spring element (340) is arranged at an end of the locking bolt (230) facing away from the operating element (240) and / or at an end of the locking bolt (230) facing the operating element. [5] Hand tool according to claim 1 or 2, characterized by that the at least one spring element (340) is formed integrally with the operating element (1140). [6] Hand tool according to claim 5, characterized by that the operating element (1140; 1940) is designed as a spring clip or as an elastomer clip. [7] Hand tool according to claim 6, characterized by that the operating element (1140) designed as a spring clip has spring arms (1141, 1142) which can be acted upon towards one another in order to move the operating element (240) from the blocking position (219) into the intermediate position (700). [8] Hand tool according to one of claims 1 to 4, characterized by that the operating element (240) is rotatable about a rotation axis (289) which is oriented perpendicular to a longitudinal extension (102) of the tool holder (140) for movement from the blocking position (219) into the intermediate position (700). [9] Hand tool according to one of the preceding claims, characterized by that the tool holder (140) has a blocking element (250) with at least one holder (1151, 1152) and / or a contact edge (411, 412) for rotationally locking the operating element (240) in the blocking position (219). [10] Hand tool according to claim 9, characterized bythat the locking bolt (230) is assigned at least one damping element (530, 540) for at least partially damping an action on the insert tool (145) in an idle state of the hand-held power tool (100), wherein the operating element (240) has a receptacle (242) in which the blocking element (250) moves during damping in the idle state of the hand-held power tool (100).

Images