RU2613799C1 - Wedge for fixing working element on handle - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: wedge for fixing the working element on the handle comprises the central wedging part and the side inserts placed relative to the central wedging part. Notches are made on the surface of the insert adjacent to the handle and immersed in it. The ends of the inserts are bonded to each other above the central wedging part, and at least one of them has the possibility of the contact with the upper butt of said part.

EFFECT: design simplification and improvement of the wedge operational characteristics.

6 cl, 5 dwg

Description

The invention relates to auxiliary elements of tools for their fastening on the handles of wood.

The prototype is a wedge for fastening a hand percussion instrument on a wooden handle, containing a central proppant with a wedge-shaped cross section and side inserts connected by jumpers that are spaced relative to the central proppant along its longitudinal axis of symmetry in the direction of its entry and are located in planes perpendicular to the plane wedge-shaped section of the central proppant [A.S. USSR 1477536, IPC B25G 3/28, 1989].

The disadvantage of the prototype is:

- the complexity of the design of the wedge;

- insufficient strength of fastening of the percussion instrument, due to the lack of reliable locking of the wedge in working condition due to the size dispersion in the manufacture of parts, which can lead to its displacement during operation during prolonged exposure to multiple significant shock loads;

- the lack of full contact of the surface of the wedge to the handle due to the relatively large contact surface of the tip of the insert, which prevents the complete entry of the tip into the material of the handle and, therefore, the snug fit of the insert to the latter. It also impairs the wedge fastening strength and can lead to displacement of the wedge and subsequent reeling (hanging) of the tool relative to the handle during operation.

The objective of the invention is to simplify the design and improve performance.

The problem is solved in that the wedge for mounting the working body on the handle containing side inserts located relative to the central proppant, has notches in the insert, on the surface adjacent to the handle and drowning in it, while the ends of the inserts are fastened between the central proppant itself and at least one of them has the ability to contact with the upper end of the specified part.

On the fastened ends of the inserts, the notches are made in the opposite direction. The width of the insert is less than the width of the central proppant. The notches are made in the form of a triangle. The height of the notches decreases from the bottom of the insert to its top. The height of the notches placed along the stake is greater than the height of the notches located across.

These distinctive features allow you to achieve the following advantages compared with the prototype.

The insertion, on the surface adjacent to the handle and drowning in it, notches, fastening of the ends of the inserts with each other and providing one of the inserts with the possibility of contact with the upper end of the specified part, simplifies the design of the wedge and ensures a snug fit of the surface of the latter to the handle. In this case, the inserts are held in the handle by glaring protrusions, and the central part - by the fastened ends of the inserts. All this increases the reliability of fastening the percussion instrument.

Performing on the surface of the insert protruding above the handle notches in the opposite direction allows you to better hold the wedge in the handle due to the notches pressed into its end face after bonding the inserts together.

Performing the insert width smaller than the width of the central proppant allows the central part (when making it from wood) to come into direct contact with the handle on a larger surface, which improves the retention of the central part in the handle, since the coefficient of friction of a tree on a tree is greater than metal on a tree. This increases the reliability of the mount.

The implementation of the notches in the form of a triangle improves their penetration into the material of the handle and allows you to more firmly hold the insert from moving along the surface of the handle, since the triangle is essentially a flat wedge that facilitates deep penetration into the material. Penetration would be carried out with even less effort if the tip and edges of the triangle were sharpened. This increases the reliability of the fit and fastening of the wedge.

Reducing the height of the notches from the bottom of the insert to its top improves the conditions of abutment of the central part of the wedge to the handle, preventing the formation of cracks between this part and the handle, thereby eliminating the possible penetration of water into the slot and decay of the tree.

Performing the height of the notches placed along the stake, greater than the height of the notches located transversely, allows for a more snug fit of the insert surface to the handle, since less force is required for the penetration of the notch along the wood fibers than across. This increases the reliability of mounting the wedge in the handle.

The invention is illustrated by drawings.

In FIG. 1 shows a wedge for mounting the working body on the handle at the time it begins to be installed in the slot of the handle. In FIG. 2 shows a wedge after installing its central part in the slot. In FIG. 3 shows a wedge after fastening the ends of its side inserts over the central part. In FIG. 4 shows a side insert of a wedge. In FIG. 5 shows a view A of an insert.

The wedge for attaching the working body to the handle contains a central proppant part 1, which can interact with side inserts (petals) 2, having notches in the form of triangular protrusions 3 and placed in the slot 4 of the handle 5, on which the working body 6 is mounted. The insert can be figured holes 7 after extruding the protrusions.

A wedge works for fastening the working body as follows.

In the slot 4 of the handle 5 is placed (leaving the ends) side inserts 2, facing the protrusions 3 to the surface of the slot, and the central proppant part 1 is pressed between them (Fig. 1). In this case, triangular protrusions 3 (notches), made, for example, as a kitchen grater, are pressed into the surface of the wooden handle 5, on the end of which the working body 6 is previously put on (Fig. 2, 4, 5). Then, for example, with a milling cutter, the excess of part 1 protruding above the end of the handle is removed, the ends of the inserts 2 are bent and fastened together, for example by contact welding, over part 1 (Fig. 2, 3).

The implementation of the invention will allow you to create a simple in design and reliable wedge for mounting the shock working body on the handle.

Claims (6)

1. A wedge for attaching a working member to a wooden handle, comprising a central proppant and side inserts located relative to the central proppant in the slots of the handle, characterized in that the inserts are made in the form of petals and notches are made on the surfaces adjacent to the handle, with the ends the inserts are fastened together over the central proppant and at least one of them has the ability to contact the upper end of the proppant. 2. The wedge according to claim 1, characterized in that at the fastened ends of the inserts the notches are made in the opposite direction. 3. The wedge according to claim 1, characterized in that the width of the insert is less than the width of the central proppant. 4. The wedge according to claim 1, characterized in that the notches are made in the form of a triangle. 5. The wedge according to claim 1, characterized in that the height of the notches decreases from the bottom of the insert to its top. 6. The wedge according to claim 1, characterized in that the height of the notches placed along the stakes is greater than the height of the notches located transversely.

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