SU1751307A1 - Device for securing cutting bit of mining machine - Google Patents

Abstract

SUMMARY OF THE INVENTION: The device comprises a tool holder with a longitudinal slot and with transverse channels, a locking element and a channel in the tool holder. The locking element is made in the form of an U-shaped bracket made of an elastic material. The side of the tool holder is made with a blind socket to accommodate the base of the bracket of shorter length. The channel in the tool holder is made with two sections in one plane. The longitudinal symmetry axes of the sections are angled to each other. The base of the bracket of the longer holder and in the channel of the holder 1 or

Description

The invention relates to the mining industry, namely to devices for fastening the cutting tools of the executive bodies of mining machines.

A device for fastening a cutter of a mining machine is known, comprising a tooth fixed in the recess of the holder by means of a cotter pin having an eccentric part. By turning the pin with a handle that extends it, you can insert the eccentric part into a groove made on one of the sides of the tooth shank to fasten it, or take this part out of the groove to replace the tooth

A disadvantage of this device is the unreliability of the attachment of the clove, since it is possible for the eccentric part of the pin to exit the groove of the shank as a result of the longitudinal movement of the clog during its operation, and the impact of the broken pieces of the mineral on the pin pin.

The closest in technical essence to the proposed device is

for mounting a cutter of a mining machine, including a tool holder with a longitudinal slot for accommodating the tool holder and transverse channels for accommodating a locking element that are coaxially in the tool holder side locking element and a channel for accommodating a locking element fixed in one of the side frames of the tool holder longitudinal located in the tool holder cylindrical stud.

The known device is characterized by the complexity of the design, which involves the presence of two locking elements, and inconvenience in maintenance, as the time required to replace the tool increases.

The purpose of the invention is to simplify the design of the device while improving ease of maintenance by reducing the time required to replace the tool.

The drawing shows the proposed device, the cut,

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The device for fastening the cutter of the mining machine includes a tool holder 1 with a longitudinal slot 2 for accommodating the holder of the tool 3 with a channel 4 made with two sections located in one plane, the longitudinal axes of which are angled to each other, the top of which is oriented to the entrance 5 of the longitudinal slot 2 tool holders 1. In the side frames of the tool holder 1, transverse channels 6 are coaxially arranged, and one of the side frames is provided with a bore, in which there is a blind socket 8, the longitudinal axis of which is parallel to the longitudinal axis across b channel in the corresponding side of the tool holder 1. The locking element 9 is made in the form of a U-shaped bracket made of elastic material with bases of different lengths. The base 10 of the longer bracket is located in the transverse channels 6 of the tool holder side 1 and in the channel 4 of the tool holder 3, and the base 11 brackets of shorter length are located in the hollow socket 8 of the sidewall of the tool holder 1, while the length of the base 11 brackets of shorter length are greater than the depth of the hollow socket 8

The device for fastening the cutter of the mining machine works as follows

In the tool holder 1 in the longitudinal slot 2, the holder of the tool 3 is inserted and inserted from the bore 7 into the transverse channels b of the tool holder 1 and the channel 4 of the tool holder 3, the locking element 9 with the base 10 of greater length, while the base 11 of a smaller length is inserted with a light hammer the blind socket 8 until it stops The base 10 is elastically bent, exerting on the cutter 3 a force applied to the base of its shank The locking element 9 is kept from falling out in channels 4 and 6 by friction forces between the base 10 and the surface of channels 4 and 6 as well

forces arising when the deformation wave moves along the base 10. When replacing the cutter, the locking element 9 with a screwdriver is removed from channels 4 and 6 and

blind nest 8

The proposed device is simple in design, convenient and reliable in operation.

Claims (1)

Invention Formula A device for fastening a cutter of a mining machine, comprising a tool holder with a longitudinal socket for accommodating the tool holder and transverse channels for accommodating a locking element that are coaxially arranged in the tool holder sides, a locking element and a channel for accommodating a locking element located in the tool holder, characterized in that in order to simplify its design while improving ease of maintenance by reducing the time spent on replacing the cutter, the locking element is made in the form of a U-shaped bracket made of elastic material with bases of different lengths, and one of the tool holder sidewalls is made with a blind socket to accommodate the base of the bracket of smaller length whose longitudinal axis is parallel to the longitudinal axis transverse channel in the corresponding sidewall of the tool holder; in this case, the channel in the cutter holder is made with two sections located in one plane, the longitudinal symmetry axes of which They are located at an angle to each other, the top of which is oriented towards the entrance of the toolholder longitudinal socket, and the longer bracket base is located in the transverse channels of the toolholder sidewalls and the tool holder channel, and the shorter base base length is deeper than the depth of the hollow socket in the toolholder sidewall.