Cutter with round tail with cutter support

FIELD: mining.

SUBSTANCE: suggested invention is related to the field of mining and construction, in particular to cutters with round tails. Cutter with round tail comprises tail, at the same time tail is retained with the possibility of rotation in clamping cartridge. Clamping cartridge is equipped with one or several retaining elements that protrude inside, which enter circular groove arranged in cutter tail, so that clamping cartridge is retained on round tail of cutter without possibility of shift in axial direction. One or several retaining elements are installed in medium transverse plane of clamping cartridge or have identical axial distance from it. Clamping cartridge is arranged with the possibility of installation in two axial positions turned by 180° around its longitudinal axis on round tail of cutter and fixation on it selectively in one of both identical positions. Retaining elements are arranged between two oriented forming edges across longitudinal axis of clamping cartridge and are stamped and/or impressed inside. Besides forming edges pass along part of clamping cartridge circumference and have distance from each other, which is equal or less than width of circumferential groove in round tail of cutter.

EFFECT: simplified installation of clamping cartridge on round tail of cutter.

11 cl, 4 dwg

 

The invention relates to a pick-containing liner, which with the help of the clamping sleeve is held in the toolholder bore, and the shank is held in the clamping sleeve can be rotated, while the clamping sleeve provided with one or more protruding inside the retaining elements, which are executed in a round shank cutter ring groove, so that the clamping sleeve is retained on the round shank cutter immobile in the axial direction.

In this having a round shank of the cutter with the cutter holder is important axial position of the clamping sleeve on the shank of the tool holder, so that the clamping sleeve had probably smaller axial clearance. In addition, the shank of the cutter should be centered in the clamping sleeve with retaining elements so that the shank goes in the clamping sleeve with the possibility of free rotation.

Having a round shank cutter with holder specified in the beginning of the kind known from EP 0264015 A1 and DE 3712427 A1. In these known cutters with round shank as circumferential groove in the round shank cutter and pressed and/or depressed retaining the elements of the clamping sleeve are located in the end area of the shaft and, accordingly, the clamping sleeve.

Thus, axial p is the situation of the clamping sleeve on the round shank cutter firmly set, however, when installing the clamping sleeve must observe the correct position of the end sides of the clamping sleeve. Additionally, this is the location of the ring groove and the retaining element does not contribute to improved centering round shank in the clamping sleeve.

The objective of the invention is to facilitate the installation of the clamping sleeve on the round shank chisel in the case of having a round shank cutter, while also improving the centering of the clamping sleeve on the shank.

This object of the invention is solved by the fact that the holding element or the holding elements are located in the middle transverse plane of clamping sleeves or have it the same axial length, and that the clamping sleeve is made with possibility of installation on the round shank chisel in two rotated 180° around its longitudinal axis axial position and to lock it in one of the two identical provisions.

The displacement of the retaining elements in the Central transverse plane of the clamping sleeve and the corresponding position of the circumferential grooves in the round shank cutter when installing the clamping sleeve is not required to pay attention to the correct position of the end sides of the clamping sleeve.

It is also true, for example, at the location of the two or more circumferential rows by keeping the operating elements at the same distance from the middle transverse plane.

Regardless of the position of the clamping sleeve is always achieved one of the identical provisions of the clamping sleeve on the round shank cutter.

With this commit and supports symmetric clamping sleeve also improves the centering clamping sleeves on all the longitudinal direction. Thereby also improves the possibility of free rotation of the shank in the clamping sleeve.

Independent of the orientation of the clamping sleeve uniform characteristics of the rotation can be achieved in a simple way due to the fact that the retaining element or, respectively, the retaining elements are made symmetrically relative to the Central transverse plane of the clamping sleeve.

If in another embodiment, provided that the outer edges on both end sides of the clamping sleeve beveled, easier installation having a round shank cutter located on the shank of the clamping sleeve in the bore of the tool holder, in accordance with one implementation of the beveled outer edge of the end sides of the clamping sleeve are located at an angle of about 30-60° to the outer wall of the clamping sleeve to enable reliable input clamping sleeve into the corresponding socket of the tool holder.

To reduce to a minimum axial clearance of the clamping sleeve on the round shank chisel in one modificat is provided, that the retaining elements are allocated between the two directed transversely to the longitudinal axis of the clamping sleeve stamped edges and vyshtampovanny and/or depressed inside, and pressed the edges pass on part of the circumference of the clamping sleeve and have a distance from each other that is equal to or less than the width of the circumferential grooves in the round shank cutter. To reduce the radial clearance can be additionally provided that the retaining elements are converted to convex base of the circumferential grooves coaxial, concave centering the plot.

Formed in this concave centering sections of the holding elements ensure good centering of the shank in the clamping sleeve.

Thereby the retaining elements are preferably provided so that the clamping sleeve has three retaining element, of which one retaining element lies opposite the slotted clamping sleeve and both of the other holding element is shifted relative to that of one holding element around the circumference of the clamping sleeve is approximately 100°, and that the width of the circumferential grooves and thereby corresponding to the width of the holding elements is selected to be approximately 1/9-1/3 of the axial size of the clamping sleeve. When this concave centering sections of the holding elements are, for example,the angular area of about 30-50° of the circumference of the clamping sleeve to ensure sustainable support.

In order to vyshtampovannyj and/or depressed retaining elements do not have any sharp edges that may adversely affect the ability to rotate the round shank chisel in one implementation the retaining elements are provided, the ends of the concave centering sections of retaining elements through a convex curve moving in the transition area, and he in turn through a concave curve passes into the inner wall of the clamping sleeve. Additionally it can be provided that the opposing concave centering sections of convex outer sections of the clamping sleeve pass the ends through a concave curve, a transition section and a convex curvature in the outer wall of the clamping sleeve, and that the retaining elements vyshtampovanny and/or pushed so far inside that the convex outer areas, which protivorechat concave centering sections, spaced from the inner wall of the clamping sleeve, and that the depth of the circumferential grooves in the round shank cutter is of such dimensions that the concave centering sections of the holding elements in the tension of the clamped state of the clamping sleeve are arranged at a small distance from the bottom circumferential grooves.

If, finally, provided that the facing to the top of the cutter end side for IMEI sleeve is located at a distance from the conical introductory plot holes in the tool holder, which receives a tapered ledge head cutter or centering ledge located between the tool holder and cutter head wear washer, then this the end face of the clamping sleeve is free.

Below is a detailed description of the invention on the example of execution with reference to the accompanying drawings, which depict:

figure 1 - new clamping sleeve at the side view with side slits;

figure 2 is a longitudinal section of the clamping sleeve on the line II-II in figure 1;

figure 3 - cross section of the clamping sleeve on the line III-III in figure 1; and

4 is a partial longitudinal section having a round shank cutter with tool holder, the shank of which is equipped with a new clamping sleeve according to Fig 1 to 3, which is introduced into the toolholder bore.

As shown in Fig.1-3, the clamping sleeve 10 has a longitudinally directed slot 11, while the outer edges 14 and 15 of the end sides 12 and 13 are chamfered. Beveled outer edges 14 and 15 are inclined at an angle of about 30° to the outer wall of the clamping sleeve 10, so that they do not interfere with the introduction of conical introductory section 42 of the hole 41 of the holder 40 (see figure 4).

The outer edges 14 and 15 are beveled on both end sides 12 and 13, since the clamping sleeve 10 each of both end sides 12 and 13 may be referred to the introductory section 42.

Hold the s elements 16, 17 and 18 are located in the middle transverse plane 38 of the clamping sleeve 10 and is made symmetrically with her.

As shown in figure 4, round shank 31 of the cutter 30 has a circumferential groove 39, the location of which is selected so that the clamping sleeve 10 can be fixed on the shaft 31 in one of two axial positions, in which the retaining elements 16, 17, 18 are in the ring groove 39. Since the clamping sleeve 10 is made mirror relative to the Central transverse plane 38, is secured on the shaft 31 is rotated 180°. This facilitates its installation, since there is no need to observe the correct position relative to the shaft 31, as known in the holders. Therefore, the new clamping sleeve 10 may take on the shank 31 of one of the two identical provisions. Thus due to the approval of the holding elements 16, 17 and 18 and a circumferential groove 39 in the shank 31 is guaranteed that even facing the top 37 of the cutter end face 12 is not in a conical introductory section 42 of the hole 41 in the tool holder 40 and rests freely (see figure 4). In the conical introductory section 42 receive the head 36 of the cutter tapered ledge 32 of the shoulder 33, which are adjacent disposable groove 34 and a lateral flange 35 of the head 36 with the set top 37 of the cutter.

As shown in Fig.1-3, the clamping sleeve 10 having the t three distributed around the circumference of the retaining element 16, 17 and 18. One retaining element 16 lies opposite the slot 11. Both of the other holding element 17 and 18 are offset at an angle α equal to about 100°relative to the retaining element 16 on the circumference of the clamping sleeve 10.

The retaining elements 16, 17 and 18 selected two parallel stamping edges 20 and 21 which are directed transversely to the longitudinal axis 19 of the clamping sleeve 10 and pass through the corner from 50° to 60° of the circumference of the clamping sleeve 10.

Pressed and/or depressed holding elements 16, 17 and 18 form facing toward the bottom of the circumferential groove 39 coaxial concave centering section 22, which covers the angular area between 30° and 50°.

Centering the sections 22 of the holding elements 16, 17 and 18 pass their ends through a convex curve 26, a transition section and a concave curve 25 in the inner wall of the clamping sleeve 10. Lying opposite to the concave centering sections 22 convex outer parts move at both ends through a concave curve 24, a transition section and a convex curve 23 in the outer wall of the clamping sleeve 10.

The retaining elements 16, 17 and 18 can be vyshtampovanny and/or pushed so far inside that they are in the clamped state of the clamping sleeve 10 in the hole 41 of the holder 40 are concave centering sections 22 on a small the distance from the convex bottom of the circumferential groove 29. The depth of the circumferential grooves 39 should be selected accordingly and dimensioned in such a way that the convex outer sections of the holding elements 16, 17 and 18 were located at a distance from the inner wall of the clamping sleeve 10, as shown in cross section in figure 3.

The head 36 of the cutter can rely on a wearing washer which is attached to the front side of the holder 40 and centering ledge acts conical introductory section 42 of the holder 40.

In this case, the centering ledge wear washer does not come in contact with personally addressed installed on the front side round shank 31 of the cutter 30 of the clamping sleeve 10 and may not impede the turning of the shank 31.

1. The cutter (30) round shank containing the shank (31), the shank (31) is held can be rotated in the clamping sleeve (10), the clamping sleeve (10) is provided with one or more protruding inside the holding elements (16, 17, 18), which are performed in the round shank (31) of the cutter (30) ring groove (39), so that the clamping sleeve (10) is held at the round shank (31) of the cutter (30) without the possibility of a shift in the axial direction, when one or more holding elements (16, 17, 18) are located in the middle transverse plane (38) of the clamping sleeve (10) or who have her same axial distance, while the clamping sleeve (10) is made with possibility of installation in two rotated 180° around its longitudinal axis (19) of axial positions on the round shank (31) of the cutter (30) and fixing it in one of the two identical provisions, characterized in that the holding elements (16, 17, 18) allocated between two oriented transversely to the longitudinal axis (19) of the clamping sleeve (10) stamped edges (20, 21) and vyshtampovanny and/or depressed inside, and pressed the edges (20, 21 walking along part of the circumference of the clamping sleeve (10) and have a distance from each other that is equal to or less than the width of the circumferential groove (39) in the round shank (31) of the cutter (30).

2. The pick according to claim 1, characterized in that one or several holding elements (16, 17, 18) is executed symmetrically relative to the Central transverse plane (39) clamping sleeve (10).

3. The pick according to claim 1 or 2, characterized in that the outer edges (14, 15) on both the end faces (12, 13) of the clamping sleeve (10) beveled.

4. The pick according to claim 3, characterized in that the beveled outer edges (14, 15) of the clamping sleeve (10) are at an angle of 10 to 60° to the outer wall of the clamping sleeve (10).

5. The pick according to any one of claims 1 to 4, characterized in that the holding elements (16, 17, 18) form obrashenii convex bottom of the circumferential groove (39) coaxial, concave centering section (22).

6. The pick according to any one of claims 1 to 5, characterized in that the clamping sleeve (10) has three holding elements (16, 17, 18), of which one holding element (16) lies opposite the slot (11) of the clamping sleeve (10), and that both of the other holding element (17, 18) is displaced, respectively, relative to the retaining element (16) on the circumference of the clamping sleeve (10) is approximately 100°.

7. The pick according to any one of claims 1 to 6, characterized in that the width of the circumferential groove (39) and thus corresponding to the width of the holding elements (16, 17, 18) is selected to be approximately 1/9-1/3 of the axial size of the clamping sleeve (10).

8. The pick on any of pp.5-7, characterized in that the concave centering sections (22) of the holding elements (16, 17, 18) are on the corner of about 30-50° of the circumference of the clamping sleeve (10).

9. The pick on any of pp.5-8, characterized in that the ends of the concave centering sections (22) of the holding elements (16, 17, 18) through a convex curve (26), a transition section and a concave curve (22) pass into the inner wall of the clamping sleeve (10), and that opposite concave centering sections (22) is convex outer sections of the clamping sleeve (10) pass the ends through a concave curve (24), a transition section and yukle rounding (23) in the outer wall of the clamping sleeve (10).

10. The pick on any of pp.5-9, characterized in that the holding elements (16, 17, 18) vyshtampovanny and/or pushed so far inside that the convex outer areas, which protivorechat concave centering sections (22)are located at a distance from the inner wall of the clamping sleeve (10), and that the depth of the circumferential groove (39) in the round shank (31) of the cutter (30) are chosen so that the concave centering sections (22) of the holding elements (16, 17, 18) while holding in the hole (41) of the holder (40) of the clamping sleeve (10) adjacent to the bottom of the circumferential groove (39) or are from him a short distance.

11. The pick on any of PP-8, characterized in that the facing to the top (37) cutter end face (12) of the clamping sleeve (10) is at a distance from the conical input section (42) of the hole (41) in the tool holder (40), which receives a tapered ledge (32) head (36) of the cutter or centering ledge located between the tool holder (40) and a head (36) of cutter wear washers.
Priority: 27.10.2005 St - claims 1 to 11.



 

Same patents:

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EFFECT: increased ability of free tool rotation and minimized tool clogging with compacted small particles, which prevent free tool rotation.

6 cl, 9 dwg

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