Hand tool with a percussion mechanism

Abstract

In a hand-held power tool with a percussion mechanism arranged in a percussion mechanism housing (155), a guide tube (210), a hammer tube (240) associated with the percussion mechanism, and a bearing element (260) for supporting the hammer tube in the percussion mechanism housing and in the guide tube, wherein the bearing element has a round base body (417) and at least two webs (412, 414) extending radially from the round base body, and wherein a recess (415) is formed between two webs adjacent in the circumferential direction (401) of the round base body, the round base body of the bearing element is C-shaped with an opening (411) in the radial direction (499), wherein the guide tube and the percussion mechanism housing form a cylindrical inner receptacle (222) along a longitudinal extent of the percussion mechanism for forming a press connection with the bearing element, wherein an outer circumference (261) of the bearing element is in the cylindrical inner receptacle (222) is arranged,and wherein an outer circumference (241) of the hammer tube forms a receptacle (242) in which an inner circumference (262) of the bearing element is arranged for at least partially supporting the hammer tube.

Description

State of the art

[0001] The present invention relates to a hand-held power tool, in particular a demolition hammer, having a percussion mechanism arranged in a percussion mechanism housing, a guide tube, as well as a hammer tube assigned to the percussion mechanism and a bearing element for supporting the hammer tube in the percussion mechanism housing and in the guide tube, wherein the bearing element has a round base body and at least two webs extending radially from the round base body, and wherein a recess is formed between two webs adjacent in the circumferential direction of the round base body.

[0002] A handheld power tool designed as a demolition hammer is known from the prior art. The demolition hammer comprises an impact mechanism arranged in a percussion mechanism housing, a guide tube, and a hammer tube associated with the impact mechanism. Furthermore, a bearing element for supporting the hammer tube is provided in the percussion mechanism housing and in the guide tube. The bearing element comprises a round base body and at least two webs extending radially from the round base body, with a recess formed between two webs adjacent in the circumferential direction of the round base body. Disclosure of the invention

[0003] The invention relates to a hand-held power tool, in particular a demolition hammer, with a percussion mechanism arranged in a percussion mechanism housing, a guide tube, as well as a hammer tube assigned to the percussion mechanism and a bearing element for supporting the hammer tube in the percussion mechanism housing and in the guide tube, wherein the bearing element has a round base body and at least two webs extending radially from the round base body, and wherein a recess is formed between two webs adjacent in the circumferential direction of the round base body.The round base body of the bearing element is C-shaped with an opening in the radial direction, wherein the guide tube and the impact mechanism housing form a cylindrical inner receptacle along a longitudinal extent of the impact mechanism for forming a press connection with the bearing element, wherein an outer circumference of the bearing element is arranged in the cylindrical inner receptacle, and wherein an outer circumference of the hammer tube forms a receptacle in which an inner circumference of the bearing element is arranged for at least partially supporting the hammer tube.

[0004] The invention thus enables the provision of a hand-held power tool with a percussion mechanism in which the bearing element enables safe and reliable mounting of the hammer tube in the guide tube.

[0005] Preferably, a first region, which is formed in the radial direction of the hammer tube between the outer circumference of the hammer tube and an inner circumference of the guide tube, and a second region, which is formed in the radial direction of the hammer tube between the outer circumference of the hammer tube and the inner circumference of the impact mechanism housing, are fluidly connected via the recess.

[0006] This allows for a simple and uncomplicated exchange of air and / or lubricant between the two areas.

[0007] Preferably, the at least two webs of the round base body are aligned radially outward in the radial direction of the round base body and form the outer circumference of the bearing element with their respective radially outer side surfaces.

[0008] This makes it easy to mount the hammer tube in the guide tube and on the striking mechanism housing.

[0009] According to one embodiment, a recess for fluidically connecting the first region to the second region is formed in the radial direction of the hammer tube between the recess of the bearing element and an inner circumference of the percussion mechanism housing.

[0010] This allows a fluid connection to be formed safely and reliably.

[0011] According to a further embodiment, the at least two webs of the round base body are aligned radially inward in the radial direction of the round base body and form the inner circumference of the bearing element with their respective radially inner side surfaces.

[0012] This makes it easy to provide an alternative storage element.

[0013] Preferably, in the radial direction of the hammer tube, between an inner circumference of the impact mechanism housing and an outer circumference of the hammer tube in the region of the recess of the bearing element, a recess is formed for fluidically connecting the first region to the second region.

[0014] This makes it easy and straightforward to provide an alternative fluid connection.

[0015] According to one embodiment, the bearing element comprises a round wire snap ring arranged in the receptacle of the hammer tube and two disc elements, wherein the round wire snap ring is arranged along a longitudinal extent of the impact mechanism between the two disc elements, and wherein the disc elements comprise a round base body with at least two webs oriented radially inward in the radial direction of the round base body.

[0016] This makes it easy to provide an alternative storage element.

[0017] Preferably, the bearing element comprises two retaining rings, each arranged in a receptacle of the hammer tube, and a disc element, wherein the disc element is arranged between the two retaining rings along a longitudinal extent of the striking mechanism, and wherein the disc element comprises a round base body with at least two webs oriented radially inward in the radial direction of the round base body.

[0018] This enables a safe and reliable arrangement of the bearing element.

[0019] Preferably, at least one first web is bent outwards in the axial direction of the round base body and at least one second web is aligned flush with the round base body.

[0020] This makes it easy to provide an alternative storage element.

[0021] Preferably, the impact mechanism housing and the guide tube are connected to one another via a screw connection, wherein the guide tube is mounted in sections on an outer circumference of the impact mechanism housing in the radial direction of the hammer tube.

[0022] This enables a safe and reliable connection of the impact mechanism housing to the guide tube. 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 mechanism arranged in a percussion mechanism housing, a guide tube and a hammer tube, Fig. 2 a section of a longitudinal section through the striking mechanism housing, the guide tube and the hammer tube of Fig. 1 to illustrate the bearing of the hammer tube, Fig. 3 an enlarged sectional view of the hammer tube bearing of Fig. 2, Fig. 4 a perspective sectional view of the bearing of the hammer tube of Fig. 2 and Fig. 3, Fig. 5 a sectional view of the bearing of the hammer tube of Fig. 2 to Fig. 4, Fig. 6 a perspective view of one of the bearings of the hammer tube of Fig. 2 to Fig. 5 assigned bearing element, Fig. 7 a perspective view of an alternative bearing element for supporting the hammer tube of Fig. 2 to Fig. 6, Fig. 8 a sectional view of the bearing of the hammer tube of Fig. 6 with the bearing element of Fig. 7, Fig. 9 a section of a longitudinal section through the striking mechanism housing, the guide tube and the hammer tube of Fig. 1 to illustrate an alternative bearing of the hammer tube with a multi-part bearing element, Fig. 10 a sectional view of the bearing of the hammer tube of Fig. 9, Fig. 11 a perspective view of one of the bearings of the hammer tube of Fig. 9 and Fig. 10 assigned bearing elements, Fig. 12 a perspective view of an alternative bearing element, Fig. 13 a section of a longitudinal section through the striking mechanism housing, the guide tube and the hammer tube of Fig. 1 to illustrate a bearing of the hammer tube with the bearing element of Fig. 12, Fig. 14 a section of a longitudinal section through the striking mechanism housing, the guide tube and the hammer tube of Fig. 1 to illustrate a bearing of the hammer tube with the bearing element of Fig. 12 and Fig. 13, Fig. 15 a sectional view of the bearing of the hammer tube of Fig. 12 to Fig. 14, and Fig. 16 a section of a longitudinal section through the guide tube, the hammer tube and a flange of Fig. 1 to illustrate an alternative mounting of the hammer tube at an end of the guide tube facing away from the striking mechanism. 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 mechanism 150 and a tool holder 140 designed to receive an insert tool 145, in particular a chisel insert tool. 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 designed to drive the percussion mechanism 150. A percussion mechanism housing 155 is illustratively assigned to the percussion mechanism 150. Furthermore, a guide tube 210 is provided, which is preferably fastened to the percussion mechanism housing 155 via a screw connection 190. A hammer tube (240 in Fig. 2). The hammer tube (240 in Fig. 2) is for guiding at least one piston element (232 in Fig. 2) along a longitudinal extension 102 of the impact mechanism housing 155 in at least one operating state. Preferably, the at least one operating state is impact operation 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 a section of the impact mechanism housing 155 and the guide tube 210 connected to the tool holder 140, as well as a flange 285 of the hand tool 100 of Fig. 1, to illustrate the percussion mechanism 150 of Fig. 1. Here, a hammer tube 240 assigned to the impact mechanism 150 is arranged perpendicular to the longitudinal extension 102 or in the radial direction 201 within the guide tube 210 and the impact mechanism housing 155. Radially inside the hammer tube 240, a piston guide element 259 is arranged for acting on a piston element 232. The piston element 232 transmits impacts to an impact means 231 of the impact mechanism 150. The impact means 231 in turn transmits the impacts to the insert tool 145 arranged in the tool holder 140 of Fig. 1. An air spring 258 is preferably formed along the longitudinal extension 102 between the piston guide element 259 and the piston element 232. Furthermore, the hammer tube 240 has recesses 257. It should be noted at this point that the structure and function of the percussion mechanism 150 as such are sufficiently known from the prior art, so that a detailed description thereof can be omitted here for the sake of brevity.

[0030] The guide tube 210 is connected to the insert tool 145 by Fig. 1 is connected to the tool holder 140 via the flange 285. Preferably, the guide tube 210 is connected to the tool holder 140 via a screw connection 190 aligned along the longitudinal extent 102. Illustratively, the hammer tube 240 is mounted at its end facing the tool holder 140 on a bearing section 219 of the guide tube 210.

[0031] A bearing element 260 is assigned to the hammer tube 240 for supporting the hammer tube 240 in the percussion mechanism housing 155 and in the guide tube 210. Illustratively, the bearing element 260 is arranged at an end of the hammer tube 240 facing the percussion mechanism housing 155. The guide tube 210 and the percussion mechanism housing 155 form a preferably cylindrical inner receptacle 222 along the longitudinal extent 102 of the percussion mechanism 150 for forming a press connection with the bearing element 260. An outer circumference 261 of the bearing element 260 is arranged in the preferably cylindrical inner receptacle 222. Furthermore, an outer circumference 241 of the hammer tube 240 forms a receptacle 242, wherein an inner circumference 262 of the bearing element 260 is arranged in the receptacle 242 for at least partially supporting the hammer tube 240.

[0032] As described above, the impact mechanism housing 155 and the guide tube 210 are connected to one another via the screw connection 190, wherein the guide tube 210 is stepped and is mounted in sections on an outer circumference 224 of the impact mechanism housing 155 in the radial direction 201 of the hammer tube 240. A side surface 212 of the guide tube 210 forms an illustrative left side surface of the inner receptacle 222, and a side surface 223 of the impact mechanism housing 155 forms an illustrative right side surface of the inner receptacle 222. Illustratively and by way of example, the impact mechanism housing 155 forms a surface for receiving the outer circumference 261 of the bearing element 260. Alternatively, the guide tube 210 can also form a surface for receiving the outer circumference 261 of the bearing element 260.

[0033] Preferably, a first region 291 is formed in the radial direction 201 of the hammer tube 240 between the outer circumference 241 of the hammer tube 240 and an inner circumference 211 of the guide tube 210. Furthermore, a second region 292 is formed in the radial direction 201 of the hammer tube 240 between the outer circumference 241 of the hammer tube 240 and the inner circumference 221 of the impact mechanism housing 155. The bearing element 260 has at least one recess (415 in Fig. 4), whereby the recess (415 in Fig. 4) the first and second areas 291, 292 are fluidly connected.

[0034] Fig. 3 shows an enlarged section of the striking mechanism housing 155, the guide tube 210, the hammer tube 240, and the bearing element 260 of Fig. 2. This illustrates Fig. 3 shows the cylindrical inner receptacle 222 formed by the side surfaces 212 of the guide tube 210 and the side surface 223 of the striking mechanism housing 155 for forming a press connection 390 with the bearing element 260. In addition, Fig. 3 a recess 311 formed on the outer circumference 224 of the impact mechanism housing 155. A sealing element 310 is arranged in the recess 311. The sealing element 310 is preferably designed as a sealing ring.

[0035] Fig. 4 shows the impact mechanism housing 155, the guide tube 210, the hammer tube 240, and the bearing element 260 of Fig. 2 and Fig. 3. This illustrates Fig. 4 shows the bearing element 260, which has a round base body 417 and at least two webs 412, 414 extending radially from the round base body 417. Illustratively, seven webs 412, 414 are formed in the circumferential direction 401 of the bearing element 260. A recess 415 is formed at least between two, and preferably between two, adjacent webs 412, 414 in the circumferential direction 401 of the round base body 417. According to the invention, the round base body 417 is C-shaped with an opening 411 in the radial direction 499. The base body 417 is preferably designed in the manner of a snap ring. The recess 415 fluidically connects the first and second regions 291, 292.

[0036] According to one embodiment, the webs 412, 414 of the round base body 417 are oriented radially outward in the radial direction 499 of the round base body 417. The webs 412, 414 are formed as radial extensions on an outer circumference 418 of the base body 417. The webs 412, 414, with their respective radially outer side surfaces 416, form the outer circumference 261 of the bearing element 260. A recess 420 for fluidically connecting the first region 291 to the second region 292 is formed in the radial direction 201 of the hammer tube 240 between the recess 415 of the bearing element 260 and the inner circumference 221 of the percussion mechanism housing 155.

[0037] Fig. 5 shows the impact mechanism housing 155, the guide tube 210, the hammer tube 240, and the bearing element 260 of Fig. 2 to Fig. 4. This illustrates Fig. 5 shows the recesses 420. Due to the C-shaped base body 417 with the opening 411, the recesses 420 are larger in the illustratively upper region, i.e., in the region of the opening 411, than in the illustratively lower region. The inner circumference 262 of the bearing element 260 is arranged in the receptacle 242 of the hammer tube 240. The webs 412, 414 are evenly distributed in the circumferential direction 401. Alternatively, the webs 412, 414 can also be unevenly distributed in the circumferential direction 401.

[0038] Fig. 6 shows the bearing element 260 of Fig. 2 to Fig. 5. This illustrates Fig. 6 the C-shaped base body 417 of the bearing element 260 with the radially outwardly directed webs 412, 414. Through the opening 411, the bearing element 260 can be moved in the circumferential direction 401 for arrangement in the receptacle 242 of the hammer tube 240 from Fig. 2 to Fig. 5 be widened.

[0039] Fig. 7 shows the bearing element 260 designed according to an embodiment variant of Fig. 6 for storage of the hammer tube 240 of Fig. 2 to Fig. 5 in the guide tube 210 and the striking mechanism housing 155 of Fig. 2 to Fig. 5. In contrast to the embodiment of Fig. 6, the at least two webs 412, 414 of the C-shaped base body 417 of the bearing element 260 are now oriented radially inward in the radial direction 499 of the base body 417. The webs 412, 414, with their respective radially inner side surfaces 716, form the inner circumference 262 of the bearing element 260. The webs 412, 414 are formed as radial extensions on an inner circumference 718 of the base body 417.

[0040] Fig. 8 shows the striking mechanism housing 155, the guide tube 210, the hammer tube 240 of Fig. 2 to Fig. 5, as well as the bearing element 260 according to the variant of Fig. 7. Preferably, the outer circumference 261 of the bearing element 260, or the outer circumference 418 of the base body 417, is arranged in the inner receptacle 222 formed by the impact mechanism housing 155 and the guide tube 210, and the inner side surface 716, or the inner circumference 262, of the bearing element 260 is arranged in the receptacle 242 of the hammer tube 240. The recess 420 for fluidically connecting the first region 291 to the second region 292 in the radial direction 201 of the hammer tube 240 is formed between the inner circumference 221 of the impact mechanism housing 155 and the outer circumference 241 of the hammer tube 240 in the region of the recess 415 of the bearing element 260.

[0041] Fig. 9 shows the striking mechanism housing 155, the guide tube 210, and the hammer tube 240 of Fig. 2 to Fig. 5 and Fig. 8, with the bearing element 260 designed according to a further alternative embodiment. The bearing element 260 is now preferably designed in several parts with a round wire snap ring 910 and two disc elements 920, 930.

[0042] The round wire snap ring 910 is arranged in the receptacle 242 of the hammer tube 240. Furthermore, the round wire snap ring 910 is arranged along a longitudinal extension 102 of the striking mechanism 150 between the two disc elements 920, 930. The two disc elements 920, 930 are preferably of identical design and each have an outer circumference 921, 931. The outer circumference 921 of the disc element 920 and the outer circumference 931 of the disc element 930 are arranged in the inner receptacle 222. Illustratively, the disc element 920 rests against the side surface 212 of the guide tube 210, and the disc element 930 rests against the side surface 223 of the striking mechanism housing 155. The two disc elements 920, 930 are spaced apart from one another by the round wire snap ring 910.

[0043] An inner circumference 922, 932 of the disc elements 920, 930 is each arranged on the outer circumference 241 of the hammer tube 240. The inner circumference 922 of the disc element 920 is illustratively arranged to the left of the receptacle 242 of the hammer tube 240, and the inner circumference 932 of the disc element 930 is illustratively arranged to the right of the receptacle 242 of the hammer tube 240. Preferably, the disc elements 920, 930 each have a chamfer 923, 933 on their inner circumference 922, 932. The round wire snap ring 910 is preferably arranged along the longitudinal extension 102 between the chamfers 923, 933.

[0044] Due to the press connection 390 between the inner receptacle 222 and the radially outer regions of the disk elements 920, 930, the disk elements 920, 930 act on their radially inner region via the associated chamfers 923, 933 to press the round wire snap ring 910 into the receptacle 242 of the hammer tube 240.

[0045] Fig. 10 shows the striking mechanism housing 155, the guide tube 210, the hammer tube 240 of Fig. 2 to Fig. 5 and Fig. 8 and Fig. 9, as well as the bearing element 260 with the round wire snap ring 910 and the disc elements 920, 930 of Fig. 9. The round wire snap ring 910 has a C-shaped base body 911 with a radial opening 1033. An inner circumference 1032 of the round wire snap ring 910 is arranged in the receptacle 242 of the hammer tube 240.

[0046] The disc elements 920, 930 preferably each have a round base body 1017 with at least two webs 1012, 1014 oriented radially inward in the radial direction 499 of the round base body 1017. The webs 1012, 1014 rest with their respective radially inner side surfaces 1041 against an outer circumference 1031 of the round wire snap ring 910. The inner circumference 1032 of the round wire snap ring 910 forms the inner circumference of the bearing element 260. The outer circumferences 921, 931 of the disc elements 920, 930 form the outer circumference of the bearing element 260.

[0047] A recess 1015 is formed between two adjacent webs 1012, 1014 in the circumferential direction 401 of each round base body 1017. The recess 1015 connects the first and second regions 291, 292 of Fig. 9 fluidically. Here, the recess 420 for the fluidic connection of the first region 291 with the second region 292 in the radial direction 201 of the hammer tube 240 is formed between an outer circumference 1031 of the round wire snap ring 910 and the recess 1015 of the disk elements 920, 930.

[0048] Fig. 11 shows the disc element 930 of Fig. 9 and Fig. 10, wherein the disc element 930 is described as an example for the two disc elements 920, 930. Fig. 11 illustrates the round base body 1017 with the webs 1012, 1014 oriented radially inward in the radial direction 499 of the round base body 1017, as well as the recesses 1015 formed between two adjacent webs 1012, 1014. Furthermore, Fig. 11 the chamfers 933.

[0049] Fig. Figure 12 shows an alternative disc element 1230 which, together with two retaining rings (1310, 1320 in Fig. 13) forms the bearing element 260. The disk element 1230 illustratively has a round base body 1217 with at least two webs 1212, 1214 oriented radially inward in the radial direction 499 of the round base body 1217. Ten webs 1212, 1214 are illustrated. The round base body 1217 illustratively has a front side 1202 and an opposite rear side 1203. Preferably, at least one web 1212 is bent outward in the axial direction 1201 of the round base body 1217 or toward the rear side 1203 in the axial direction 1201. At least a second web 1214 is preferably aligned flush with the round base body 1217. A recess 1215 is illustratively formed between two webs 1212, 1214 adjacent in the circumferential direction 401 of the round base body 1217. The recess 1215 connects the first and second regions 291, 292 of Fig. 13 and Fig. 14 fluidically. Furthermore, the disk element 1230 has an outer circumference 1231, which, in the assembled state, is arranged in the inner receptacle 222. Furthermore, the webs 1212 have a radially inner side surface 1242, and the webs 1214 have a radially inner side surface 1241. Preferably, the side surfaces 1241 of the webs 1214 form the inner circumference of the bearing element 260.

[0050] Fig. 13 shows the striking mechanism housing 155, the guide tube 210, the hammer tube 240 of Fig. 2 to Fig. 5 and Fig. 8 to Fig. 10, as well as the disc element 1230 of Fig. 12 with two lateral securing rings 1310, 1320 along the longitudinal extension 102 to form the bearing element 260. The disc element 1230 is preferably along a longitudinal extension 102 of the striking mechanism 150 of Fig. 1 is arranged between the two retaining rings 1310, 1320. The retaining rings 1310, 1320 are arranged laterally, or illustratively to the right and left, of the disk element 1230 in associated recesses 242. The recesses 242 are formed, as described above, on the outer circumference 241 of the hammer tube 240. Due to the at least one web 1212 bent outward in the axial direction 1201, a preload is formed between the two retaining rings 1310, 1320, which ensures a play-free fit of the disk element 1230. Fig. 13 illustrates the curved web 1212 that abuts the retaining ring 1320. Furthermore, the retaining ring 1310 illustratively has an outer circumference 1311, and the retaining ring 1320 has an outer circumference 1321.

[0051] Fig. 14 shows the impact mechanism housing 155, the guide tube 210, the hammer tube 240 and the bearing element 260 with the disc element 1230 of Fig. 12 and Fig. 13 and the retaining rings 1310, 1320 of Fig. 13. This illustrates Fig. 14 the webs 1214, whose side surfaces 1241 form the inner circumference of the bearing element 260 and are arranged on the outer circumference 241 of the hammer tube.

[0052] Fig. 15 shows the impact mechanism housing 155, the guide tube 210, the hammer tube 240 and the bearing element 260 of Fig. 13 and Fig. 14, where Fig. 15 only one retaining ring 1320 is shown. According to one embodiment, the retaining rings 1310 and 1320 are Fig. 13 and Fig. 14 each formed as a snap ring with an opening 1599. The recess 420 for the fluidic connection of the first region 291 with the second region 292 in the radial direction 201 of the hammer tube 240 is between an outer circumference 1321 of the retaining ring 1320 (or 1331 of the retaining ring 1330 of Fig. 13 and Fig. 14) and the recess 1215 of the disc element 1230.

[0053] Fig. 16 shows the guide tube 210, the hammer tube 240, the tool holder 140 and the flange 285 of Fig. 2. According to an alternative embodiment, the flange 285 now additionally has an extension 1620 formed along the longitudinal extension 102 with a side surface 1612. Furthermore, the guide tube 210 has the side surface 223 to form the inner receptacle 222. The bearing element 260 is arranged in the inner receptacle 222, wherein the press connection 390 according to Fig. 3. The outer circumference 261 of the bearing element 260 is arranged in the inner receptacle 222, analogous to the previous embodiments. The inner circumference 262 of the bearing element 260 is arranged in the recess 242 of the hammer tube 240, analogous to the previous embodiments.

[0054] As above with Fig. 2, the tool holder 140 is connected to the guide tube 210 via the screw connection 190. Furthermore, the tool holder 140 has a recess 1611 for arranging a sealing element 1610. The sealing element 1610 is preferably designed to seal between the tool holder 140 and the guide tube 210.

Claims

[1] Hand tool (100), in particular a demolition hammer, with a percussion mechanism (150) arranged in a percussion mechanism housing (155), a guide tube (210), as well as a hammer tube (240) assigned to the percussion mechanism (150) and a bearing element (260) for supporting the hammer tube (240) in the percussion mechanism housing (155) and in the guide tube (210), wherein the bearing element (260) has a round base body (417) and at least two webs (412, 414; 1012, 1014; 1212, 1214) extending radially from the round base body (417), and wherein between two webs (412, 414; 1012, 1014; 1212, 1214) adjacent in the circumferential direction (401) of the round base body (417) a recess (415) is formed, characterized byin that the round base body (417) of the bearing element (260) is C-shaped with an opening (411) in the radial direction (499), wherein the guide tube (210) and the percussion mechanism housing (155) form a cylindrical inner receptacle (222) along a longitudinal extent (102) of the percussion mechanism (150) for forming a press connection (390) with the bearing element (260), wherein an outer circumference (261) of the bearing element (260) is arranged in the cylindrical inner receptacle (222), and wherein an outer circumference (241) of the hammer tube (240) forms a receptacle (242) in which an inner circumference (262) of the bearing element (260) is arranged for at least sectionally supporting the hammer tube (240). [2] Hand tool according to claim 1, characterized byin that a first region (291), which is formed in the radial direction (201) of the hammer tube (240) between the outer circumference (241) of the hammer tube (240) and an inner circumference (211) of the guide tube (210), and a second region (292), which is formed in the radial direction (201) of the hammer tube (240) between the outer circumference (241) of the hammer tube (240) and the inner circumference (221) of the impact mechanism housing (155), are fluidically connected via the recess (415). [3] Hand tool according to claim 1 or 2, characterized by that the at least two webs (412, 414) of the round base body (417) are oriented radially outwards in the radial direction of the round base body (417) and form the outer circumference (261) of the bearing element (260) with their respective radially outer side surfaces (416). [4] Hand tool according to claim 2 and 3, characterized bythat in the radial direction (201) of the hammer tube (240) between the recess (415) of the bearing element (260) and an inner circumference (221) of the percussion mechanism housing (155) a recess (420) is formed for the fluidic connection of the first region (291) to the second region (292). [5] Hand tool according to claim 1 or 2, characterized by that the at least two webs (412, 414) of the round base body (417) are oriented radially inward in the radial direction (499) of the round base body (417) and form the inner circumference (262) of the bearing element (260) with their respective radially inner side surfaces (716). [6] Hand tool according to claim 2 and 5, characterized bythat in the radial direction (201) of the hammer tube (240) between an inner circumference (221) of the impact mechanism housing (155) and an outer circumference (241) of the hammer tube (240) in the region of the recess (415) of the bearing element (260) a recess (420) is formed for fluidically connecting the first region (291) to the second region (292). [7] Hand tool according to claim 1 or 2, characterized by in that the bearing element (260) has a round wire snap ring (910) arranged in the receptacle (242) of the hammer tube (240) and two disc elements (920, 930), wherein the round wire snap ring (910) is arranged along a longitudinal extent (102) of the percussion mechanism (150) between the two disc elements (920, 930), and wherein the disc elements (920, 930) have a round base body (1017) with at least two webs (1012, 1014) oriented radially inwards in the radial direction (499) of the round base body (1017). [8] Hand tool according to claim 7, characterized by in that the bearing element (260) has two retaining rings (1310, 1320) each arranged in a receptacle (242) of the hammer tube (240) and a disk element (1230), wherein the disk element (1230) is arranged along a longitudinal extent (102) of the striking mechanism (150) between the two retaining rings (1310, 1320), and wherein the disk element (1230) has a round base body (1217) with at least two webs (1212, 1214) oriented radially inwards in the radial direction (499) of the round base body (1217). [9] Hand tool according to claim 8, characterized by that at least one first web (1212) is bent outwards in the axial direction (1201) of the round base body (1217) and at least one second web (1214) is aligned flush with the round base body (1217). [10] Hand tool according to one of the preceding claims, characterized bythat the impact mechanism housing (155) and the guide tube (210) are connected to one another via a screw connection (190), wherein the guide tube (210) is mounted in sections on an outer circumference (224) of the impact mechanism housing (155) in the radial direction (201) of the hammer tube (240).

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