SU905450A1 - Device for securing cutting tools - Google Patents

Description

 DEVICE FOR CUTTING FASTENERS

one

The invention relates to devices for fastening cutting tools of the executive bodies of mining and earth-moving machines.

Known devices for fastening the cutting tool include a body on which the tool shank is mounted and clamps in the form of elastic elements P.

The disadvantage of such devices is the complexity of the design ({zhksator, which reduces the reliability of fastening the tool.

Closest to the proposed technical solution is a device for fastening the cutting tool, including a housing with through grooves and latches in the shape of a truncated cone with a through axially tapered bore for the tapered head of the locking element, mounted with a smaller base into the recess of the tool from the side of the body 2. TOOL

The disadvantage of such devices is the impossibility of protecting the instrument from damage under dynamic loads.

The purpose of the invention is to protect the instrument from damage.

The delivered chain is achieved by the fact that in the device for fastening the cutting tool, which includes a housing with scozal grooves and clamps in

10 the shape of a truncated cone with a through axially tapered hole for the tapered head of the locking element, mounted with a smaller base into the recess of the tool on the housing side,

The IS smaller retainer base has radial grooves mated to the retainer hole, while the conicity of the retainer is greater than the conicity of its recess, and the mating of the smaller base of the retainer to its conical surface is curvilinear.

FIG. 1 shows a device for fastening a cutting tool, a common

view in fig. 2 - seed aa in figure 1; in fig. 3 and 4 show two projections of the lock.

The device for fastening the cutting tool includes a housing 1 cos

through grooves 2 and clamps 3 in the shape of a truncated cone with a through axial taper hole 4 for the taper head of the locking element 5 The smaller base 6 clamps has 10 slots 7, which are aligned with the Ixator hole, and the taper surface 8 of the clamp is more than the taper surface 9 of its hole. Conjugation 10 smaller base 15

The ixator with its conical surface 8 is curved.

When the actuator operates at the moment of its collision with a strong inclusion of the rock, a dynamic load appears, exceeding several times the normal working load on the device for fastening the cutting tool. In this case, from the side of the case, the disk lock 5 is mainly affected by bending forces, which guarantees the destruction of the disk lock in the plane of the grooves.

The proposed device allows for the reuse of cutting tools.

Claims (2)

1. A device for fastening the cutting tool, including a housing with through grooves and latches in the shape of a truncated cone with a through axially tapered hole for the tapered head of the locking element, mounted with a smaller base into the tool’s recess on the housing side, characterized in that in order to protect the tool from breakage, the smaller base of the Fixers has radial grooves mated to the clamp hole, while the taper of the clamp is greater than the taper of its hole. 2. The device according to Clause 1, about tl and which is so that the mating of the smaller base of the clamp with its conical surface is made curvilinear. Sources of information taken into account in the examination 1. The UK patent number 982053, cl. E 1 F, published I960. 2. US patent ff 3 b9332, cl. publish 1969 (prototype). Srig. one