BG1490U1 - Removable tooth coupling system for the bucket of a bucket excavator - Google Patents

Abstract

The system can be used in digger machines and has an adapter (2) for fixing along the leading edge of the bucket. In the adapter (2), removable tooth (3) is positioned, fixed by fixator (11) against accidental falling. The adapter (2) has a shape similar to truncated pyramid with rounded surfaces and at the coupling end it has a coupling bracket (6) of a shape corresponding to the profile of the leading edge. The adapter (2) has at its other end a longitudinal cylindrical opening (7) where a fixator (11) is positioned in a ring-shaped insert (10) at the end of the cylindrical tail (9) of the tooth (3), where the cylindrical opening (7) has a ring-shaped channel (13). The fixator (11) is elastic and has the shape of cylindrical ring with a slot (15) in its peripheral wall (16). The upper surface (12) of the coupling bracket (6) of the adapter (2) is inclined against the longitudinal axis O of the cylindrical opening (7) for the tooth (3) at an alpha angle not greater than 45?, and the optimum will be 10?.

Description

Technical field

The interchangeable tooth attachment system to the basket of a basket excavator is applicable in mechanical engineering, in particular in earthmoving machines.

BACKGROUND OF THE INVENTION

A removable tooth attachment system to a basket of basket excavator [US 5423138] is known, which has an adapter with a fast-wearing retainer for easy replacement of a removable tooth. The adapter is attached to the cutting tooth by means of a profile curve shaped, for example, in a side view close to the trapezoid. The removable tooth has a recess with a supporting lower surface, which touches the profile protrusion of the adapter and is fixed in this position by means of a stud in an opening blocked there with a pin therein. Such a construction uses specially prepared retainers and is not suitable for replaceable teeth commonly used for replacement in earthmoving machines.

There is also another attachment system for a changeable tooth to a basket excavator basket [PL 64914 Y1] with an adapter for attachment of a replaceable tooth and a cat retainer tooth locker that connects to the basket socket using a suitable bolt, into the locking hole of the stem. The adapter is in the form of a three-dimensional body, at least partially converging in the direction of its upper surface, with a cross-section close to a quadrangle, provided to its border with the stem with a transverse opening, which serves to fix the coaxially inserted tooth in the longitudinal opening of the adapter the help of a splint. Replacing the replaceable teeth is relatively complex, since it requires a slot on the cutting tooth of the basket to secure the adapters themselves with relatively complex geometry. These adapters sockets and openings get very dirty while operating the basket, causing considerable replacement problems for both teeth and adapters.

Another attachment system for a removable tooth is known to a basket excavator basket [PL 117318 Y1], in which, to reinforce such a system, the removable tooth has a conical adapter, which converges in the direction of the tooth blade made of a profile block of ceramic. solid alloys, and a cylindrical stem with the locking part has a circular hole in its free end for positioning the lock. The stem-side adapter has a flat surface that touches the frontal, also a flat wall of the tooth. This tooth is similar in structure to the removable tooth commonly used in earthmoving machines, but further adjustment of its tooth is required in the part that serves to attach the retainer.

The utility of the utility model is to create an attachment system for a replaceable tooth to the cutting tooth of the basket of a basket excavator with a simple and stable attachment and a simultaneous extension of the service life of the replaceable teeth.

The technical nature of the utility model

This task is solved by creating an attachment system for a replaceable tooth to a basket of a basket excavator, with an adapter for fixing it on the attacking part of the basket. In this adapter is positioned a removable tooth, fixed with a latch against accidental fall. The adapter is a body of a shape close to the intersected pyramid, with rounded surfaces, and has an attachment bracket at its connecting end, with a shape corresponding to the profile of the attacking edge of the basket. The adapter at the other end has a longitudinal, cylindrical opening for the cylindrical tail of the replaceable tooth. The retainer is positioned in an annular insert at the end of the cylindrical tail of the replaceable tooth. The retainer is elastic and has a cylindrical ring with a slit in its circumferential wall. The upper surface of the adapter mounting bracket is inclined toward the longitudinal axis O of the cylindrical orifice of the removable tooth at an alpha angle of not more than 45 °.

The best effect is obtained when the alpha angle is 10 °.

There may be a annular groove in the cylindrical opening whose position corresponds to the position of the annular insert of the tail of the removable tooth, the annular groove being for retaining an annular annulus.

1490 Ul relief stop located on the retainer.

It is possible that in the middle part of the outer circumferential side of the retainer ring there is a relief stopper with a series of point convexities and a length L greater than half the perimeter of the side wall. In this case, the slit is zigzag and passes through the middle of the side wall in the area without relief stopper. The slit topology ensures that the ends of the retainer slide into the slit area when tightened and loosened.

There may be an annular projection on the front face of the adapter around the cylindrical opening, and there may be a annular groove at the rear end of the removable tooth blade that holds the annular projection.

There may be longitudinal grooves on the outer surface of the adapter.

The attachment system for a replaceable tooth to the cutting tooth of a basket on a basket excavator has a simple and stable fixing and at the same time prolongation of the service life of the replaceable teeth.

Explanation of the annexed figures

The utility model is more precisely explained in the figures where:

Figure 1 is a longitudinal section view of the interchangeable tooth attachment system along the longitudinal axis of the adapter;

Figure 2 is a cross-sectional view of the attachment of the replacement tooth stem in the adapter;

Figure 3 is a sectional view of a possible formation of the front of the adapter and the rear surface of the working part of the replaceable tooth;

Figure 4 is an asymmetric view of the retainer with a ring-shaped relief stopper issued;

Figure 5 is an asymmetric depiction of a latch with a protruding stopper with a number of point projections;

Figure 6 is an asymmetric representation of the interchangeable tooth attachment system to the basket of a basket excavator.

Exemplary implementation and operation of the utility model

Replacement tooth attachment system to basket of basket excavator, FIG. 1 consists of an adapter 2 for fixing on the attacking part of the basket. In this adapter 2 is positioned a removable tooth 3, fixed with a latch 11 against accidental fall. Adapter 2 is a body with a shape close to the intersected pyramid, with rounded surfaces, and having a clamp 6 on its connecting end, with a shape corresponding to the profile of the attacking edge of the basket. The adapter 2 at the other end has a longitudinal, cylindrical opening 7, in which is positioned the retainer 11, which is at the end of the cylindrical tail 9 of the removable tooth 3, in which the cylindrical opening 7 has a annular groove 13. There is an annular insert 10 of the tail 9. replaceable tooth 3. The retainer 11 is elastic and has a cylindrical ring with a slot 15 in its circumferential wall 16. The upper surface 12 of the adapter bracket 6 of the adapter 2 is inclined toward the longitudinal axis 0 of the cylindrical hole 7 for the removable tooth 3 below. Alpha angle not exceeding 45 °.

The best effect is obtained when the alpha angle is 10 °.

It is possible that the annular groove 13 of the cylindrical orifice 7 is in the stop zone of the annular insert 10 of the tail 9 of the replaceable tooth 3 - FIG. 2, in a suspended position, an annular relief stop 14 of the retainer 11 is in the annular groove 13.

It is possible that in the middle part of the outer circumferential side 16 of the retainer ring 11 there is a relief stopper 14 with a series of point projections 14a and a length L greater than half the perimeter of the side wall 16; 4 and FIG. 5. The slit 15 is zigzag and runs through the middle of the side wall 16 in the area without relief stop

14. The slit topology 15 provides mutual sliding of the ends of the retainer 11 in the area of the slit 15 when tightening and loosening.

It is possible for the front face 17 of the adapter 2 to have an annular projection 18 around the cylindrical opening 7, and at the rear end 19 of the blade tooth 3 there may be a annular groove 20, in which the annular projection 18 is in a fixed position. 3.

When the alpha angle is 10 °, it is possible to store the optimum limits of the bending effects on the removable tooth.

1490 Ul

3. To securely attach the replaceable tooth 3 to the adapter 2.

It is possible that there are longitudinal grooves on the outer surface of adapter 2 - FIG. 1 and FIG. 6.

The inclination of the upper surface of the attachment bracket 6 in the adapter 2 adjacent to the proud surface at the edge of the hopper ensures optimal distribution of operating loads during operation.

The main advantage of the utility model is the simple and efficient positioning of the tail 9 of the replaceable tooth 3 in the cylindrical opening 7 of the adapter 2 with easy mounting and dismantling by pressing and pulling.

The fixing of the removable tooth 3 in the adapter 2 is simple and is carried out by the elastic reaction of the pre-tightened retainer 11 with the stopper 14. When the tail 9 is pressed in the cylindrical opening 7, its end falls into the retainer 11 and it is locked in. the annular groove 13 in the adapter 2. In this way, the removable tooth 3 is locked to the adapter 2. Additionally, in the annular protrusion 18 in the front face 17 of the adapter 2, it falls into the annular groove 20a at the rear end of the blade 3. This gives additional stability. In addition, this fixation ensures a stable alignment of the outer surfaces of the adapter 2 and the removable tooth 3. The removable tooth 3 is pulled out by pulling, after which the stopper 11 returns to the starting position.

The presence of the chutes 4 - FIG. 6 - during the operation direct the buried mass and thus reduce the pollution of the system.

Claims (6)

Claims 1. Attachment system for replaceable tooth (3) to a basket of a basket excavator, with an adapter (2) for fixing on the attacking part of the basket, with a replaceable tooth (3) fixed with a lock (11) in this adapter (2). against accidental fall, the adapter (2) being a body of shape close to the intersected pyramid, with rounded surfaces, and having at its connecting end a clamp (6) having a shape corresponding to the profile of the attacking edge of the basket, such as the other end has a longitudinal cylindrical opening (7) for a cylindrical tail (9) of the replaceable tooth (3), and a retainer m (11) is positioned in a ring insert (10) at the end of the cylindrical tail (9) of the replaceable tooth (3), characterized in that the retainer (11) is elastic and has a cylindrical ring with a slit (15) ) in its circumferential wall (16) and the upper surface (12) of the adapter bracket (6) of the adapter (2) is inclined relative to the longitudinal axis O of the cylindrical opening (7) for the replaceable tooth (3) at an angle alpha, not greater than 45 °. A removable tooth attachment system (3) to a basket excavator basket according to claim 1, characterized in that the alpha angle is 10 °. 3. Replaceable tooth attachment system (3) to a basket excavator basket according to claims 1 and 2, characterized in that it has a annular groove (13) in the cylindrical opening (7) whose position corresponds to the position of the annular insert (10). ) on the tail (9) of the removable tooth (3), the annular groove (13) holding the protruding annular relief stopper (14) located on the retainer (11). 4. A removable tooth attachment system (3) to a basket excavator basket according to claim 3, characterized in that the relief stop (14) is arranged in the middle part of the outer circumferential side (16) of the retainer ring (11). a number of point projections (14a) having a length L greater than half the perimeter of the side wall (16), the slit (15) being zigzag and passing through the middle of the side wall (16) in the non-embossed portion the stopper (14) and the slit topology (15) provides mutual sliding of the ends of the retainer (1 1) in the slot area (15) when tightening and loosening. A removable tooth attachment system (3) to a basket excavator basket according to claim 1, characterized in that there is a annular projection (18) around the cylindrical opening (7) along the front face (17) of the adapter (2), and at the rear end (19) of the blade (3a) of the replaceable tooth (3) there is a annular groove (20) which holds the annular protrusion (18). A removable tooth attachment system (3) to a basket excavator basket according to claim 1, characterized in that there are longitudinal grooves (4) along the outer surface of the adapter (2). 5