Hammer with divided hammer tip

Abstract

The invention relates to a hammer, in particular for comminuting devices, including a rotor and/or at least one shaft to and/or on which the hammer can be fixed. Said hammer consists of a lower body provided with a through hole which is provided to connect the hammer to the rotor and/or the shaft, and at least one cutting body which can be detachably/rigidly connected to the lower body. The cutting body of the invention includes at least two parts.

Claims

1. A hammer for use in a comminution device that has a rotor and a shaft to or on which the hammer can be fastened, the hammer comprising a lower body provided with a through hole, wherein the through hole is provided for connecting the hammer with the rotor and the shaft, and at least one cutting body, wherein the at least one cutting body is connected detachably with the lower body, wherein the at least one cutting body is formed of a blade, a support body and a pressing piece; wherein the blade is positioned between the support body and the pressing piece; wherein the lower body supports the at least one cutting body by extending between the shaft and a tip of the blade adapted to rotate around the shaft; and wherein a connection shoulder is provided at the support body, and the connection shoulder fittingly engages with a recess provided in the lower body, wherein the recess is sectionally J-shaped causing a self-locking connection when seen from a direction parallel to a rotation axis of the shaft, and the connection shoulder and the recess have corresponding shapes, and the recess is provided in a part of the lower body that engages with and receives the support body.

2. The hammer according to claim 1, wherein a connection shoulder is provided at the support body, the at least one cutting body and the support body are supported across their overall width on or at the lower body.

3. The hammer according to claim 2, wherein the support body is configured such that it can be inserted at least partly along with the connection shoulder in the lower body.

4. The hammer according to claim 1, wherein a recess is provided in the lower body, and the recess is encircled on four sides, and has lateral guide bridges, wherein the support body has at least two support surfaces that are wedge-shaped or conically tapering, and the support body interacts with counter support surfaces provided correspondingly at the support body.

5. The hammer according to claim 1, wherein blade support surfaces are provided at the support body on the support body's side facing the blade for holding, supporting and centering the blade.

6. The hammer according to claim 5, wherein at the blade, blade counter support surfaces are formed interacting with the blade support surfaces, and in the at least one cutting body and the support body, each time a bore hole is provided, the bore holes are provided correspondingly for holding a connecting means.

7. The hammer according to claim 6, wherein the connecting means is a screw.

8. The hammer according to claim 1, wherein the blade fittingly engages with the pressing piece and the support body.

9. The hammer according to claim 1, wherein the blade is configured as exchange blade with two blade tips.

10. The hammer according to claim 1, wherein at the blade at the edges and sides pointing in cutting direction hardened areas, hard facings, welding-ons, hard metal coverings are provided.

11. The hammer according to claim 1, wherein the blade is formed from hard metal.

12. The hammer according to claim 1, wherein the blade is configured wedge-shaped or V-shaped in the direction of the blade tips.

13. The hammer according to claim 1, wherein the blade has two centering elevations.

14. The hammer according to claim 1, wherein at the blade, wedge-shaped or V-shaped areas are provided to fittingly engages with the support body.

15. The hammer according to claim 1, wherein at the lower body at least one opening is provided, on the side of the lower body opposite cutting direction, extending at least to the through bore hole and serving for holding a lubricant.

16. The hammer according to claim 1, wherein the lower body and the at least one cutting body have been created at least partly as forged/punched parts, and the blade is formed in one piece and corresponds with the width of the at least one cutting body.

17. A comminution device is a chipper with at least one hammer according to claim 1.

18. A hammer for use in a comminution device that has a rotor and a shaft to or on which the hammer can be fastened, the hammer comprising a lower body provided with a through hole, wherein the through hole is provided for connecting the hammer with the rotor and the shaft, and at least one cutting body, wherein the at least one cutting body is connected detachably with the lower body, wherein the at least one cutting body is formed of a blade, a support body, and a pressing piece; wherein the blade is positioned between the support body and the pressing piece; wherein the lower body supports the at least one cutting body by extending between the shaft and a tip of the blade adapted to rotate around the shaft, and a recess is provided in an interior of the lower body, in which at least one connection shoulder is provided at the support body fittingly engages with the recess, and the connection shoulder fittingly engages with a nose provided at the lower body; and wherein the recess is sectionally J-shaped causing a self-locking connection when seen from a direction parallel to a rotation axis of the shaft.

Description

(1) In the following, the invention will be described by means of examples. In the figures:

(2) FIGS. 1a and 1b: hammer according to the invention in a side view and as three-dimensional representation,

(3) FIGS. 1c and 1d: support body according to the invention in different views,

(4) FIG. 1e: blade according to the invention in a modification,

(5) FIG. 2a: another embodiment of the hammer according to the invention with support body, blade, and pressing piece in a three-dimensional view,

(6) FIGS. 2b, 2c and 2d: hammer according to FIG. 2a in different views,

(7) FIGS. 2e and 2f: blade for a hammer according to FIG. 2a in different views.

(8) FIGS. 1a and 1b show a hammer in a first embodiment according to the invention in a side view and in a three-dimensional representation. In the shown embodiment, hammer 1 consists of a lower body 2 with a through bore hole A for connecting the hammer 1 with the rotor or the shaft. The cutting body 3 consists of a blade 31 and at least one support body 32. As it can be seen, blade 31, support body 32, and lower body 2 are connected detachably/rigidly by means of a screw 100 designed preferably as machine screw. The screw 100 is secured with a nut 101. The bore holes in the blade 31, in the support body 32, and in the lower body 2 are here designed such that they correspond in assembled condition so that the screw 100 can be inserted without any problems.

(9) In the chosen embodiment, the blade 31 has a blade tip 310. The blade tip 310 defines a turning circle d. At the lower body 2 a support area 22 is provided that is in assembled condition or in the shown position in the top area of the lower body 2. Here a turning circle e of the lower body is defined that is determined by the upper edge of the lower body 2 or the support area 22. A defined distance between the turning circle d of the blade and the turning circle e of the lower body now determines the reduced amount that can be reached as a maximum without damaging the lower body 2. However, it is provided conveniently that the turning circle e is located at the upper bending angle of the support body 32 as an intermediate piece. The result is that the support body 32 as the intermediate piece 32 is neither reduced nor damaged, either, when used as intended.

(10) In the interior of the lower body 2 a recess 4 is arranged in which at least one connection shoulder 5 provided at the support body 32 as the intermediate piece engages form-fittingly. The connection shoulder 5 interacts here form-fittingly with a nose 21 provided at the lower body 2. On the side of the lower body 2 opposite the cutting direction an opening 200 is shown serving, for example, for holding a lubricating nipple. Thus lubricant can get in the through bore hole A for lubricating, if necessary, a bush that is arranged there and that is then also bored through.

(11) FIGS. 1c and 1d show a support body 32 according to the invention in different views. It can be seen here clearly that the connection shoulder 5 is indented so that it engages in a recess 4 only indicated in FIG. 1. The recess 4 is here encircled on four sides and has lateral guide bridges 6 forming the limitation of the recess 4. In the state of the art, the connection shoulder 5 has been located directly at the blade, and thus the blade, of course, had an essentially more solid configuration. This lead in particular to high losses of material during the intended employment and the required exchange of the blades. The invention now requires only to exchange the blades 31; Support body and lower body 2 can be used repeatedly. It can be seen clearly that in FIGS. 1c and 1d appropriate blade support surfaces 321 to 325 are provided on the side facing the blade in the assembled condition for the intended use. Furthermore, support surfaces 331 and 332 are shown extending V-like tapering outwards. The configuration of the support body 32 according to the invention allows to produce a self-centering connection between the support body and the lower body 2. Reference number 324 indicates an angled surface also supporting the blade 31.

(12) FIG. 1e shows an embodiment of a blade 31 according to the invention. This blade 31 is part of the cutting body 3 indicated schematically by an arrow. At the blade the blade tip 310 is pointed out, furthermore, blade counter support surfaces 311, 312, and 313 designed wedge-like opposite the cutting direction are shown.

(13) FIG. 2a shows another embodiment of the hammer 1 according to the invention. However, here an even more advantageous modification of the material share and a low-wear design, respectively, is shown consisting of a support body 32, a blade 31, as well as a pressing piece 33. These three bodies, support body 32, blade 31, and pressing piece 33, form the cutting body 3. The blade 31 has here, as it can be seen, a very low material share compared with the other bodies of the hammer 1. The screw 100 connects again the bodies, the blade 31 being held here only clampingly and form-fittingly. The bore hole extends from the pressing piece 33 through the support body 32 to the lower body 2. The blade 31 is configured as exchange blade and has accordingly two blade tips 310.

(14) FIGS. 2b to 2d show several views of the embodiment according to FIG. 2a. All reference numbers have already been presented, and are used here in the same way. Presenting anew is therefore not necessary.

(15) FIGS. 2e and 2f show a blade 31 as exchange blade. It has the two blade tips 310/1 and 310/2. Furthermore, the V-shaped areas 316 and 317 are shown that are a part of the form-fitting connection to the support body 32. On the opposite side, two centering elevations 314, 315 are shown serving for interacting with the pressing piece 33.

(16) The invention has been described before by means of examples. The claims filed now and to be filed later on along with the application are attempted formulations without prejudice for obtaining a broader protection.

(17) References in the sub-claims refer to the further design of the matter of the main claim through the characteristics of the respective sub-claim. These are, however, not to be understood as a waiver for obtaining an independent, subjective protection for the characteristics of the referred sub-claims.

(18) Characteristics so far only disclosed in the description can be claimed in the course of proceedings as being of inventive relevance, for example to distinguish from the state of the art.