SU1451263A1 - Cutting unit of mining machine - Google Patents

Description

The invention relates to the mining industry, and in particular to the executive bodies of mining machines. '

The aim of the invention is to increase the wear resistance of the Executive body by increasing the intensity of rotation of the cutter during cutting.

Figure 1 shows the Executive body, General view; figure 2 - node I 10 in figure 1.

The executive body of the mining machine includes a holder 1 cutter 2 with pro. longitudinal axis of symmetry 3.

The tool holder is located in the 15th longitudinal hole 4 of the holder 5 of the fist 6, which is mounted on the housing 7 of the executive body of the mining machine. The tool holder is installed in the holder of the fist with a clearance fi _MOKC with 20 the possibility of free rotation, longitudinal movement and angular deflection ob and has a shank 8 with a groove 9 under the latch 10. The shank is equipped with a support 11 in the form of a truncated 25 cone with an end face flat base 12, which interacts with the end part 13 of the cam stop 14. The end flat base of the shank support is limited by its intersection line 30 with the sphere, the center of which is located at point 0 of the axis intersection. 15 holder holes' with axis 3 der ~. the cutting tool at its maximum ^K C ^{= + B} where L is the length of the fist holder, mm;

B is the distance from the cam stop to its holder, mm;

Mach ^{- the} size of the gap in the fist holder with a maximum angular deviation of the toolholder, mm.

With the rotating body 7 of the executive body of the mining machine, this organ is fed to the face 16. Cutter 2 is introduced into the rock and separates part of the rock from it, while the cutter is deflected in the fist by an angle sb with the center of deviation at point 0 and the radius of deviation. To _with , it contacts the end base of its support with the fist stop and rotates around its longitudinal axis during operation. Then this one; the cycle is repeated many times.

The end flat base 12 of the shank is limited by the line of its intersection with the sphere centered at point 0 and radius R _c ; under cyclic loads, this leads to the formation of a spherical surface, which is in contact with the focus of the fist at a point. This point contact is located approximately in the center of the holder with an angular deviation of about in the fist, and ve-35 of the incisor, which significantly reduces the moment, the radius K _s is found to be out of the resistance to the rotation of the incisor in

VNIIIPI Order 7044/25 Circulation 514

Subscription

Custom polygr. ave, city of Uzhhorod, st. Project, 4

Claims (1)

EXECUTIVE BODY OF THE MINING MACHINE, including a tool holder with a longitudinal axis of symmetry located in the longitudinal hole of the fist holder with the possibility of free rotation, longitudinal movement and angular deviation, and a tool shank having a support with a face flat base located with the possibility of interaction with the end part of the cam stop ·, Characterized in that, in order to increase wear resistance by increasing the intensity of rotation of the cutter during cutting, the end flat base of the support is limited by a line its intersection with a sphere whose center is located at the point of intersection of the axis of the hole of the holder with the axis of the tool holder at its maximum angular deviation in the fist, and the radius K _c is determined from the expression R _c = - + В + & „ _ax , • where L is the length of the fist holder, mm; B is the distance from the cam stop to the cam holder, mm; L _{MO | kC} - the size of the gap in the fist holder at the maximum angular deviation of the toolholder, mm. SU „„ 1451263