FI64828B - SKOPTAND FAEST VID EN BYGGNADSMASKINS SAERSKILT GRAEVMASKINS SKOPAS KANT - Google Patents

Description

r, NOTICE A / 1o0o tBJ (11) UTLÄGGNINGSSKRIFT 6 4 0 ^ 0

Patent aeddelal.

^ v ^ (51) Kv.lk 3 / lnt.CI.3 E 02 F 9/28 SUOMI_FINLAND (21) PK * nttlh »k *» nu * - P * t * nt »n * eknlng 701952 (22) H »K« ml »pllvl— AnsBknlngtdtg 19-06.78 (FI) (23) Alkupllvl - Glltighatsdig 19. Ob. 78 (41) Tullut | ulklscksl - Bllvit offantlig 05. OU. 79

National Board of Patents and Registration · / 44) Date of issue: oq nq 0 ^

Patent and registration authorities Anaekan utlagd och utl ^ kriftun publkcrad J J

(32) (33) (31) Petty «zeal— Begird prlorltut Ol + .IO. 77

Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) P 27 ^ 97-9 (71) Intertractor Viehmann GmbH & Co., Hagener Strasse 325, 5820 Gevelsberg, Federal Republic of Germany-Förbundsrepubliken Tyskland (DE) (72) Hansjoachim Brunn, Damme, Carl Fass Ennepetal,

Federal Republic of Germany-Förbundsrepubliken lyskland (DE) (7 * 0 Leitzinger Oy (5 ^) Bucket harrow attached to the bucket blade of a construction machine, in particular an excavator - Skoptand fäst vid en byggnadsmaskins, särskilt Grävmaskins, skopas kant

The invention relates to a bucket tooth attached to the bucket blade of a construction machine, in particular an excavator, comprising a toothed body bearing a replaceable tooth tip resting against the inner surface of the bucket, the tip being somewhat wedge-shaped and gripped by a tooth tip recess cut passes through the holes in the tooth tip and the body tip, squeezing the tooth tip into the body tip, in addition to which the tooth body rests on the front surface of the bucket blade with a downwardly extending shoulder.

In such a bucket tooth known from DOS publication 2,605,211, the part of the tooth body which attaches to the bucket blade is formed in a U-shaped section, the shoulder of which along the tooth body is fixedly connected at its free end to the bucket blade, this connection usually by welding. The object of the invention is now to provide, with a bucket tooth as described above, the possibility that, with the same consumption of working material as before, it is possible to withstand considerably greater loads applied by the toothpicks to the bucket blade than before.

2 64828 According to the invention, this object is achieved in that the rear part of the tooth body, starting from the shoulder resting on the edge of the bucket blade, has an H-shaped cross-section with the web approximately parallel to the inner surface of the bucket blade on which the tooth body rests, and the line of action of the longitudinal forces transmitted to the profiled tooth body intersects the web in the region above the mid-shoulder.

These measures provide a much better conduction of force to the bucket blade than before. This is done in such a way that the longitudinal forces generated by the tooth tips are now also applied to the shoulder of the tooth body part, which acts as a fastener, almost straightforwardly and without torque.

While, according to the already described, known embodiment, the longitudinal forces from the tooth tip to the shoulder region are transmitted substantially in the longitudinal direction of the tooth tip and tooth body, however, in the shoulder region is approximately form; it is found that the device according to the invention, which requires the same amount of substance, provides significantly greater shape stability than the known device.

A preferred embodiment for the above-described function in the wedge surfaces above and below the tooth body tip is grooves running in the mounting direction of the tooth tip and in that the respective sides of the tooth tip recess cut have protruding grooves arranged longitudinally and adhering to said grooves.

Thus, the position of the interchangeably mounted tooth tip on the tooth body is much better ensured than hitherto, so that even in harsher working conditions, the preselected direction of the lines of action of the forces from the tooth tip to the tooth body remains correct.

3 64828

It is also advantageous if the system for interchangeably connecting the tooth tip to the tooth body is provided with a negative clearance in order to improve the suitability under load as the loading time increases.

In a further preferred embodiment of the invention, the plane of symmetry between the sides corresponding to the wedge surface of the tip of the tooth cutting body is at an acute angle to the plane of symmetry of the outer surfaces of the tip ends. , its second outer surface forms a smaller obtuse angle with the lower surface of the bucket blade than before.

In addition, it is preferred that the thickness of the web increase regularly as it leaves its rear end towards the shoulder.

An embodiment of the invention will be explained in more detail below with reference to the accompanying drawings, in which:

Fig. 1 shows a section of the bucket tooth mounted in place along the line I-I in Fig. 2.

Figure 2 shows the same seen from above.

Figure 3 shows the same section along the line III-III.

Figure 4 shows the same section along the line IV-IV.

This bucket tooth attached to the excavator's bucket blade 1 consists of a tooth body 2, a toothed tip 3 attached thereto and a mounting bolt 4. The tooth body 2 has a wedge-shaped tip 5 extending over the bucket blade 1 and attached to a tooth tip 3 arranged according to the tip 5.

The bolt 4 passes through the holes 7 and 8 arranged to be displaced in the tooth tip 3 and the tip 5 64828 so that the tooth tip 3 is tightened on the tip 5 by the bolt 4.

At the connection point of the tip 5, a shoulder 9 resting on the end face of the bucket blade 1 is arranged in the tooth body 3.

Related to this, the section of the tooth body 2 at the opposite end, viewed at the tip 5, is I-shaped.

The web 10 of this tooth body portion extends approximately flush with the upper surface of the bucket blade 1.

The flange edges 11 against the bucket blade 1 are fixed to the bucket blade 1 by weld seams (not shown).

The tip 5 is bent and the web 10 is arranged so that the lines of action of the longitudinal forces acting from the tooth tip 3 on the web 10 intersect in the region of the shoulder 9.

Longitudinal grooves 12 are provided in the wedge surfaces of the tip 5 and protrusions 14 corresponding to the shape of the grooves 12 are formed in the respective surfaces 13 of the cut 6. The symmetry surfaces of the cutting surfaces 13 intersect the symmetry surfaces of the outer wedge surfaces 15, 15 'so that, as shown in Fig. 1 1 with a large, almost right-angled obtuse angle.

However, if the tooth tip 3 is rotated 180 ° about its longitudinal axis and attached to the tip 5, as shown by the broken lines in Fig. 1, the coulter surface 15 'forms a smaller obtuse angle with the lower surface of the bucket blade 1 than before, resulting in a larger free cut angle.

All new individual and combination features appearing in the description and / or drawings of the invention are considered essential to the invention.

Claims (4)

5 64828 A bucket tooth attached to the bucket blade of a construction machine, in particular an excavator, comprising a toothed body (2) bearing a replaceable tooth tip (3) resting against the inner surface of the bucket (1), the tip (5) being approximately wedge-shaped and gripped by a tooth tip recess 6 ), wherein the tooth tip (3) is fixed to the tooth body (2) by a bolt (4) passing through the holes (7, 8) of the tooth tip (3) and the tip (5) of the body (2) by pressing the tooth body into the body tip. ) rests on the front surface of the bucket blade (1) with its downwardly extending shoulder (9) at its front, characterized in that the rear part of the tooth body (2), starting from the pension (9) resting on the edge of the bucket blade (1), has an H-shaped cross section. 10) runs approximately parallel to the inner surface of the bucket blade (1) on which the tooth body rests, and that the longitudinal forces transmitted from the tooth tip (3) over the tip (5) of the body to the H-shaped tooth body part (2) the line of intersection cuts the web (10) in the area above the mid-level shoulder (9). A bucket tooth according to claim 1, characterized in that the wedge surfaces above and below the tooth body tip (5) have grooves (12) extending in the mounting direction of the tooth tip (3) and that the respective sides (13) of the tooth tip (3) recess (6) have projecting protrusions (14) fitted into the grooves (12), longitudinally and adhering to said grooves. Bucket tooth according to Claim 2, characterized in that the plane of symmetry between the sides (13) corresponding to the wedge surface of the body tip (5) of the tooth tip cut (6) is at an acute angle to the plane of symmetry of the outer surfaces (15, 15 '). wherein the lower of the converging tooth tip outer surfaces (15) is at an angle approximately parallel to the lower surface of the bucket blade (1), up to a right angle, and when the tooth tip (3) is rotated 180 ° about its longitudinal axis, its second outer surface (15 ') forms the lower bucket blade (1) with a smaller obtuse angle than before. β 64828 Bucket tooth according to one or more of the preceding claims, characterized in that the thickness of the web (10) increases regularly as it leaves its rear end towards the shoulder (9).