Eisenhammer

Abstract

Iron hammer comprising a handle (10), a first tool head (20) and a second tool head (30), characterized by that the handle (10), in contrast to the first and second tool heads (20, 30), is made of lightweight material and is designed such that it extends in the longitudinal direction, wherein the handle (10) has a handle part (11) and a base part (12), wherein the handle part (11) and the base part (12) are connected to one another, wherein an L-shaped recess (13) is formed at one end of the base part (12) and an axle hole (14) is formed at the other end thereof, which is connected to the recess (13), so that the first tool head (20) can be assembled with the second tool head (30) via the recess (13) and the axle hole (14) and can be mounted on the handle (10), wherein at least one first joining part (131) is arranged on the wall surface of the recess (13); that an L-shaped supporting edge (21) is formed on one end of the first tool head (20), on which a fixing hole (22) is arranged, wherein a first hole (23) is provided on the upper side of the first tool head (20), which is connected to the fixing hole (22), wherein by supporting the supporting edge (21) on the wall surface of the recess (13), the first tool head (20) is first provisionally fixed to the handle (10), wherein at least one second joining part (211) is arranged on the supporting edge (21), wherein the fixing hole (22) of the first tool head (20) is aligned by the interlocking of the first and second joining parts (131, 211) during assembly in order to achieve a larger connection and contact surface of the base part (12) and the first tool head (20), wherein the first joining part (131) a guide rib and the second joining part (211) is a guide groove; and that the second tool head (30) has a shaft (31), at the side end of which a connecting section (32) is arranged, in which a second hole (33) is provided, wherein by inserting the shaft (31) into the axle hole (14) and pressing the connecting section (32) into the fixing hole (22) under application of pressure, the connecting section (32) sits in the fixing hole (22) with interference, whereby the first tool head (20) and the second tool head (30) are mounted together on the handle (10), wherein by inserting a closure element (40) into the first tool head (20) via the first hole (23) and connecting the first tool head (20) to the connecting section (32), the shaft (31) is prevented from gradually retracting due to strong vibrations.

Description

Technical field

[0001] The invention relates to an iron hammer which avoids causing hand pain or injuries due to vibrations during striking. State of the art

[0002] Fig. 11 shows a conventional iron hammer 60 comprising a head 61 and a handle 62, the head 61 having a first end 611 and a second end 612, the iron hammer 60 being capable of striking objects with at least the first end 611.

[0003] However, the conventional iron hammer 60 of the type mentioned above has the following deficiencies. The head 61 and the handle 62 of the iron hammer 60 are forged from a single piece of metal, such as iron or steel, so that the iron hammer as a whole is very heavy. Due to the heavy weight of the iron hammer 60, a large counterforce is generated when striking, which acts on the hand (see also Fig. 9). Therefore, the user may experience hand pain or injury due to the vibration generated when striking with the iron hammer 60, resulting in a lack of safety and comfort with the conventional iron hammer 60. Furthermore, the head 61 and the handle 62 are integrally connected, so a different mold must be manufactured when producing an iron hammer 60 with different functions. Therefore, the production of the iron hammer 60 requires greater cost and labor. Object of the invention

[0004] The invention is based on the object of creating an iron hammer which eliminates the deficiencies mentioned in the prior art. Technical solution

[0005] This object is achieved according to the invention by an iron hammer having the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0006] The invention provides an iron hammer comprising a handle, a first tool head, and a second tool head. Different from the first and second tool heads, the handle is made of lightweight material and configured to extend longitudinally, the handle having a handle portion and a base portion, the handle portion and the base portion being connected to each other, an L-shaped recess being formed at one end of the base portion and an axle hole being formed at the other end thereof, said hole communicating with the recess, so that the first tool head can be assembled with the second tool head via the recess and the axle hole and mounted on the handle.An L-shaped support rim is formed on one end of the first tool head, on which a fixing hole is arranged. A first hole is provided on the top of the first tool head and communicates with the fixing hole. By supporting the support rim on the wall surface of the recess, the first tool head is first provisionally fixed to the stem and the fixing hole is directed towards the axle hole. The second tool head has a shaft, at the side end of which a connecting portion is arranged, in which a second hole is provided. By inserting the shaft into the axle hole and pressing the connecting portion into the fixing hole under pressure, the connecting portion will fit in the fixing hole with interference, whereby the first tool head and the second tool head are mounted together on the stem.By inserting a locking element into the first tool head via the first hole and connecting the first tool head to the connecting section, the shaft is prevented from gradually retracting due to strong vibrations.

[0007] The iron hammer according to the invention is characterized by the following: The connecting portion of the second tool head press-fits into the fixing hole of the first tool head, and when the press-fit is released, the shaft retracts the first and second tool heads, so that the first and second tool heads are more firmly connected to each other at the handle. The press-fit of the connecting portion into the fixing hole is advantageous compared to a screw connection in that the press-fit prevents the first and second tool heads from gradually loosening due to vibrations that occur during use of the iron hammer. When using the iron hammer, at least the second tool head is used for striking.Because the iron hammer is lightweight overall, no excessive counterforce is generated during the striking process that is transferred to the hand, resulting in energy-saving, safer, and more comfortable handling of the iron hammer. Thus, only mild vibrations are generated during the striking process, which do not cause pain or injury to the hand. With the iron hammer according to the invention, it is advantageously possible to design the handle, the first tool head, and the second tool head in different designs depending on the desired function and to combine them with one another as desired, so that the process for manufacturing the iron hammer is diverse and variable. Thus, it is not necessary to produce a separate mold for each iron hammer with different functions. The iron hammer can thus be manufactured with reduced costs and labor. Short description of the drawings Fig. 1 shows a perspective view of a first preferred embodiment of an iron hammer according to the invention in the assembled state. Fig. 2 shows an exploded view of the iron hammer according to the invention in Fig. 1. Fig. Figure 3 shows a schematic diagram illustrating the application of pressure in the iron hammer according to the invention in Fig. 1. Fig. 4 shows a schematic representation to illustrate the filling of a closure element in the iron hammer according to the invention in Fig. 1. Fig. 5 shows a sectional view of the iron hammer according to the invention in Fig. 1 in assembled condition. Fig. Figure 6 is a schematic diagram illustrating the generation of mild vibrations transmitted to the hand during the striking process of the iron hammer according to the invention in Fig. 1. Fig. Figure 7 shows a first schematic diagram illustrating the assembly of another first tool head in the iron hammer according to the invention in Fig. 1. Fig. Figure 8 shows a second schematic diagram illustrating the assembly of another first tool head in the iron hammer according to the invention in Fig. 1. Fig. 9 shows an exploded view of a second preferred embodiment of an iron hammer according to the invention. Fig. 10 shows a sectional view of the iron hammer according to the invention in Fig. 9 in assembled condition. Fig. Figure 11 shows a schematic diagram illustrating the transmission of a large vibration generated during the striking process to the hand in a conventional iron hammer. Detailed description of preferred embodiments

[0008] Objects, features, and advantages of the present invention will be explained in more detail below with reference to the detailed description of exemplary embodiments and the accompanying drawings. However, the invention is not limited to the description of these exemplary embodiments and their illustration in the accompanying drawings.

[0009] As from Fig. 1 to Fig. As can be seen in Figure 5, the present invention relates to an iron hammer. The iron hammer comprises a handle 10, a first tool head 20, and a second tool head 30. Unlike the first and second tool heads 20, 30, the handle 10 is made of lightweight material and configured to extend longitudinally. The handle 10 includes a handle portion 11 and a base portion 12. The handle portion 11 and the base portion 12 are connected to each other. An L-shaped recess 13 is formed at one end of the base portion 12, and an axle hole 14 is formed at the other end thereof, communicating with the recess 13, so that the first tool head 20 can be assembled with the second tool head 30 via the recess 13 and the axle hole 14 and mounted on the handle 10.At one end of the first tool head 20, an L-shaped support edge 21 is formed, on which a fixing hole 22 is arranged. A first hole 23 is provided on the top of the first tool head 20 and communicates with the fixing hole 22. By supporting the support edge 21 on the wall surface of the recess 13, the first tool head 20 is first provisionally fixed to the stem 10 and the fixing hole 22 is directed towards the axle hole 14. The second tool head 30 has a shaft 31, at the side end of which a connecting portion 32 is arranged, in which a second hole 33 is provided. By inserting the shaft 31 into the axle hole 14 and pressing the connecting portion 32 into the fixing hole 22 under pressure, the connecting portion 32 will fit in the fixing hole 22 with interference, whereby the first tool head 20 and the second tool head 30 are mounted together on the handle 10.By inserting a locking member 40 into the first tool head 20 through the first hole 23 and connecting the first tool head 20 to the connecting portion 32, the shaft 31 can be prevented from gradually retracting due to strong vibrations.

[0010] According to the invention, the handle 10 is made of aluminum alloy.

[0011] According to the invention, the first and second tool heads 20, 30 are made of heavy-weight metal, such as iron or steel.

[0012] According to the invention, the grip part 11 of the handle 10 is covered with a rubber coating 15, which ensures a high level of grip comfort and has a shock-absorbing and anti-slip effect.

[0013] According to the invention, at least one first joining part 131 is arranged on the wall surface of the recess 13 and at least one second joining part 211 is arranged on the support edge 21, wherein the fixing hole 22 of the first tool head 20 is aligned by the interlocking of the first and second joining parts 131, 211 during assembly in order to achieve a larger connection and contact surface of the base part 12 and the first tool head 20.

[0014] According to the invention, the first joining part 131 is a guide rib and the second joining part 211 is a guide groove.

[0015] According to the invention, the axle hole 14 is a stepped hole and the shaft 31 is a stepped shaft, wherein at least one step edge 141, 311 is formed on the axle hole 14 and the shaft 31.

[0016] According to the invention, the first tool head 20 is a goat horn-shaped nail puller (see Fig. 1 to Fig. 6).

[0017] According to the invention, the first tool head 20 is a hammer head of a brick hammer (see Fig. 7).

[0018] According to the invention, the first tool head 20 is a hammer head of a locksmith’s hammer (see Fig. 8).

[0019] According to the invention, the hole diameter of the fixing hole 22 is slightly smaller than the outer diameter of the connecting portion 32, so that the connecting portion 32 is fitted into the fixing hole 22 by applying pressure and can sit in the fixing hole 22 with interference.

[0020] According to the invention, an opening 231 is widened in the upper region of the first hole 23 and the closure element 40 is formed by filling it with epoxy resin 41, wherein the opening 231, the first hole 23 and the second hole 33 can be filled with the epoxy resin 41 at the same time so that the opening 231 is closed without any problems (see Fig. 4 and Fig. 5).

[0021] In a further embodiment, an opening 231 in the upper region of the first hole 23 is widened and the closure element 40 is formed from epoxy resin 41 and a bolt 42, wherein the bolt 42 is first inserted into the first hole 23 and the second hole 33 and the opening 231 is further filled with the epoxy resin 41 and thereby closed (see Fig. 9 and Fig. 10).

[0022] According to the invention, the first tool head 20 is first brought to bear against a fixing surface 50 and then the connecting section 32 of the second tool head 30 is pressed into the fixing hole 22 of the first tool head 20 by a pressing machine in such a way that the connecting section 32 sits in the fixing hole 22 with an oversize (see also Fig. 3).

[0023] According to the invention, the pressing machine is a hydraulic press and the fixing surface 50 is a fixing and clamping device mounted on the hydraulic press.

[0024] The iron hammer according to the invention is characterized by the following: The connecting portion 32 of the second tool head 30 press-fits into the fixing hole 22 of the first tool head 20, and the shaft 31, when the press-fit is released, retracts the first and second tool heads 20, 30, so that the first and second tool heads 20, 30 are more firmly connected to each other on the handle 10. The press fit of the connecting portion 32 into the fixing hole 22 is advantageous compared to a screw connection in that the press fit prevents the first and second tool heads 20, 30 from gradually loosening due to vibrations that occur during use of the iron hammer. When using the iron hammer, at least the second tool head 30 is used for striking.Because the iron hammer is lightweight, no excessive counterforce is generated during the striking process, which is transmitted to the hand, resulting in energy-saving, safer, and more comfortable handling of the iron hammer. Thus, only mild vibrations are generated during the striking process (see also . Fig. 6) that do not cause pain or injury to the hand. With the iron hammer according to the invention, it is advantageously possible to design the handle 10, the first tool head 20, and the second tool head 30 in different designs depending on the desired function and to combine them with one another as desired, so that the process for manufacturing the iron hammer is diverse and variable. Thus, it is not necessary to produce a separate mold for each iron hammer with different functions. This allows the iron hammer to be manufactured with reduced cost and labor.

[0025] Although the present invention has been described in detail using exemplary embodiments, it will be understood by those skilled in the art that the invention is not limited to these exemplary embodiments. Rather, modifications are possible such that individual features can be omitted or other combinations of features can be implemented, as long as the scope of the appended claims is not exceeded. The disclosure of the present invention includes all combinations of the individual features presented. List of reference symbols 10 stems 11 Handle 12 Basic part 13 Recess 131 first joining part 14 axle hole 141 Step edge 15 Rubber cover 20 first tool head 21 Support edge 211 second joining part 22 Fixing hole 23 first hole 231 Opening 30 second tool head 31 shaft 311 Step edge 32 connecting section 33 second hole 40 locking element 41 Epoxy resin 42 bolts 50 fixing area

Claims

[1] Iron hammer comprising a handle (10), a first tool head (20) and a second tool head (30), characterized by , that the handle (10), in contrast to the first and second tool heads (20, 30), is made of lightweight material and is designed such that it extends in the longitudinal direction, wherein the handle (10) has a handle part (11) and a base part (12), wherein the handle part (11) and the base part (12) are connected to one another, wherein an L-shaped recess (13) is formed at one end of the base part (12) and an axle hole (14) is formed at the other end thereof, which is connected to the recess (13), so that the first tool head (20) can be assembled with the second tool head (30) via the recess (13) and the axle hole (14) and can be mounted on the handle (10), wherein at least one first joining part (131) is arranged on the wall surface of the recess (13); that an L-shaped supporting edge (21) is formed on one end of the first tool head (20), on which a fixing hole (22) is arranged, wherein a first hole (23) is provided on the upper side of the first tool head (20), which is connected to the fixing hole (22), wherein by supporting the supporting edge (21) on the wall surface of the recess (13), the first tool head (20) is first provisionally fixed to the handle (10), wherein at least one second joining part (211) is arranged on the supporting edge (21), wherein the fixing hole (22) of the first tool head (20) is aligned by joining the first and second joining parts (131, 211) together during assembly in order to achieve a larger connection and contact surface of the base part (12) and the first tool head (20), wherein the first joining part (131) a guide rib and the second joining part (211) is a guide groove; and that the second tool head (30) has a shaft (31), at the side end of which a connecting section (32) is arranged, in which a second hole (33) is provided, wherein by inserting the shaft (31) into the axle hole (14) and pressing the connecting section (32) into the fixing hole (22) under application of pressure, the connecting section (32) sits in the fixing hole (22) with interference, whereby the first tool head (20) and the second tool head (30) are mounted together on the handle (10), wherein by introducing a closure element (40) into the first tool head (20) via the first hole (23) and connecting the first tool head (20) to the connecting section (32), the shaft (31) is prevented from gradually retracting due to strong vibrations. [2] Iron hammer according to claim 1, characterized by that the handle (10) is made of aluminum alloy. [3] Iron hammer according to claim 1, characterized bythat the recess (13) and the support edge (21) are both L-shaped in such a way that they fit together in terms of profile. [4] Iron hammer according to claim 1, characterized by that the handle part (11) of the handle (10) is covered with a rubber coating (15). [5] Iron hammer according to claim 1, characterized by that the axle hole (14) is a stepped hole and the shaft (31) is a stepped shaft, wherein at least one step edge (141, 311) is formed on the axle hole (14) and the shaft (31). [6] Iron hammer according to claim 1, characterized by that an opening (231) in the upper region of the first hole (23) is widened and the closure element (40) is formed by filling with epoxy resin (41), wherein the opening (231), the first hole (23) and the second hole (33) can be filled with the epoxy resin (41) simultaneously so that the opening (231) is closed without problems. [7] Iron hammer according to claim 1, characterized by that an opening (231) in the upper region of the first hole (23) is widened and the closure element (40) is formed from epoxy resin (41) and a bolt (42), wherein the bolt (42) is first inserted into the first hole (23) and the second hole (33) and the opening 231 is further filled with the epoxy resin (41) and thereby closed. [8] Iron hammer according to claim 1, characterized by that the first tool head (20) is first brought to bear against a fixing surface (50) and the connecting section (32) of the second tool head (30) is further pressed into the fixing hole (22) of the first tool head (20) by means of a pressing machine in such a way that the connecting section (32) sits in the fixing hole (22) with an oversize.

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