LOCKING DEVICE FOR A WEAR PART OF A SOIL-WORKING IMPLEMENT

Abstract

A locking device (3) for a wearing part (2) detachably attached to a soil-working working element (1) by means of quick-coupling elements (11, 21), wherein a locking element (31) attached to the working element (1) includes an end portion (312) projecting from the working element (1) and being provided with an engagement section (313) arranged to engage with a lock-receiving element (22) arranged on a lee-side face (2a) of the wearing part (2).

Claims

1.-8. (canceled)

9. A locking device (3) for a wearing part (2) detachably attached to a soil-working working element (1) by means of quick-coupling elements (11, 21), wherein a locking element (31) is fixed to the working element (1) and includes a resilient end portion (312), which projects from the working element (1) and is provided with an engagement section (313) arranged to engage with a lock-receiving element (22), characterized in that said lock-receiving element (22) is a recess arranged in a bottom and rear side area (2a) of the wearing part (2), said area (2a) being shielded relative to a material flow passing over the wearing part (2) when the soil-working element (1) is in function.

10. The locking device (3) according to claim 9, wherein the end portion (312) is tensioned in the operative position of the engagement section (313).

11. The locking device (3) according to claim 9, wherein the lock-receiving element (22) is a recess arranged in the lee-side face (2a) of the wearing part (2), the recess (22) being formed as a bottom side of a transverse elevation (23) on the top side of the wearing part (2), arranged to shield the wearing-part mounting (11).

12. The locking device (3) according to claim 9, wherein the engagement section (313) includes a front portion (3131) formed as a ramp arranged for sliding contact with a portion of the lee-side face (2a) of the wearing part (2) when the wearing part (2) is being connected to a wearing-part mounting (11) arranged on the working element (1).

13. The locking device (3) according to claim 9, wherein the engagement section (313) includes a rear portion (3132) formed as a ramp arranged for sliding contact with a portion of the lee-side face (2a) of the wearing part (2) when the wearing part (2) is being disconnected from a wearing-part mounting (11) arranged on the working element (1).

14. The locking device (3) according to claim 9, wherein the locking element (31) is formed from a springy plate material.

15. The locking device (3) according to claim 13, wherein the engagement section (313) is formed as a bent portion of the plate material.

Description

[0017] In what follows, an example of a preferred embodiment is described, which is visualized in the accompanying drawings, in which:

[0018] FIG. 1 shows a view of a portion of a working element viewed in the working direction of the working element, a locking device according to the invention being in engagement with the bottom side of a wearing part;

[0019] FIG. 2 shows a longitudinal section I-I according to FIG. 1 of the working element with the locking device in engagement with the wearing part;

[0020] FIG. 3 shows a longitudinal section I-I according to FIG. 1 of the working element with the locking device, but in which, for the sake of exposition, the wearing part has been pulled away from the working element; and

[0021] FIG. 4 shows, in perspective, a portion of the working element with the locking device in engagement with the wearing point, viewed from underneath the working element.

[0022] In the figures, the reference numeral 1 indicates a working element, shown here as a lower portion of a cultivator tine for working the soil. A wearing part 2, shown here as a cultivator point, also called a goosefoot share, is releasably attached to the working element 1. The wearing part 2 includes a quick-coupling element 21 formed as a socket arranged to slidingly engage with a corresponding pin of a quick-coupling element 11, also called a wearing part mounting, which is fixed to the working element 1. A locking device 3, which is fixed to the working element 1 projects forwards along a lee-side face 2a of the wearing part 2, that is to say along a bottom side and a rear side of the wearing part 2 where the locking device 3 lies shielded to a substantial degree from the mass flow passing over the wearing part 2 when the working element 1 is in function.

[0023] On its lee-side face 2a, the wearing part 2 includes a lock-receiving element 22 shown here as a recess which is formed, here, by shaping a transverse elevation 23 on the top side of the wearing part 2 arranged to shield the wearing-part mounting 11. The lock-receiving element 22 may be provided by machining, cold or warm forming or the like, and is necessarily not connected to the presence of said elevation 23. The lock-receiving element 22 may also be formed as an elevation, not shown, projecting from the lee-side face 2a.

[0024] Reference is now made especially to FIGS. 2 and 3, in which a longitudinal section through the working element 1 elucidates the invention in its simplest embodiment. The locking device 3 is formed of a locking element 31 formed from a plate material which is fixed in a first, rear end portion 311 to a fixing bolt 24 which, together with a second fixing bolt 25, constitutes fixing means for the wearing-part mounting 11. A second, front end portion 312 of the locking element 31 projects freely forwards from the wearing-part mounting 11 and includes a raised engagement section 313 arranged to engage in a locking manner in the lock-receiving element 22 of the wearing part 2. The engagement section 313 includes front and rear ramp-shaped portions 3131, 3132, that is to say having the shape of inclined planes. In the embodiment shown, the engagement section 313 is formed by bending the plate material from which the locking element 31 is formed, but the invention is not limited to an engagement section 313 formed in this way. The engagement section 313 may be formed as a pressed-out or forged elevation, not shown, or the engagement section 313 may form a separate element, not shown, which is fixed to the locking element 31 by gluing, soldering, welding or by the use of fasteners like screws, rivets and so on.

[0025] In the embodiment shown, the locking element 31 is formed from a springy plate material.

[0026] When there is a need to ensure that a wearing part 2 on a working element 1 will not fall off, the locking element 31 is fixed to the working element 1 with a fixing bolt 24 suitable therefor. For this operation the wearing part 2 is advantageously removed from the working element 1.

[0027] When a wearing part 2 is then attached to the working element 1, the wearing part 2 is connected by its quick-coupling element 21 to the corresponding quick-coupling element of the working element 1, as the wearing part 2 is slid onto the wearing-part mounting 11. During this movement, the second end portion 312 of the locking element 31 is pressed downwards as a portion of the lee-side face 2a of the wearing part 2 slides along the front ramp-shaped portion 3131 of the engagement section 313 until the engagement section 313 locks into the lock-receiving element 22 on the lee-side face 2a of the wearing part 2 by at least the rear, ramp-shaped portion 3132 resting against a corresponding side face of the lock-receiving element 22.

[0028] When the wearing part 2 has a tendency to come loose from its engagement with the wearing-part mounting 11, the engagement section 313 will prevent this from developing in such a way that the wearing part 2 falls off the working element 1, by the pressure of the rear ramp-shaped portion 3132 of the engagement section 313 against the wearing part 2 providing a force component acting to push in the direction of the coupling direction of the quick-coupling elements 11, 21.

[0029] When a wearing part 2 is to be removed from the working element 1, it is knocked loose from the wearing-part mounting 11. During this releasing displacement the second end portion 312 of the locking element 31 is pressed downwards as a portion of the lee-side face 2a of the wearing part 2 slides along the rear ramp-shaped portion 3132 of the engagement section 313 until the engagement section 313 is free from the lock-receiving element 22 on the lee-side face 2a of the wearing part 22.