Toolhead for drawknife cutter

FIELD: mining.

SUBSTANCE: toolhead for drawknife cutter features mounting pocket open from above for receiving cutter liner limited at the ends with two lateral, one front and one back supporting walls forming drawknife cutter support located mainly in the middle part of back supporting wall and descending to the outer areas. End side of the back support wall directed to the mounting pocket features guiding surfaces in the outer areas, the said guiding surfaces descending inside at an angle to the mounting pocket and serving as an auxiliary mounting device for drawknife cutter.

EFFECT: excellent support of inserted cutter and fast and simple cutter mounting.

8 cl, 4 dwg

 

The invention relates to a tool holder for cutter coal or mining plow, open at its upper side a mounting pocket for reception is executed on the cutter shank, limited by the edges of the two side, one front and one rear support walls, and the rear support wall is elevated, protruding above the adjacent lateral support walls forming a back cutter, made mainly or essentially in the middle region of the rear supporting wall and downward to its outer regions.

Have known from DE 29803944 U holder supporting the chisel plow on the back elevation is above the lateral supporting walls only at a short interval and therefore provides only marginally improved backup cutter than the holder, with all four supporting walls have approximately the same height. Slightly improved backup cutter due to the elevated rear support wall is achieved, in General, with the disadvantage that the rear support wall may be deposited coal dust and bitterballs there, resulting in a considerably complicated disassembly of the cutter. The reason for the increased deposition of coal dust in the rear elevated supporting wall is that the rise in the known holders of the preamplifiers is treno almost across the entire width and consequently the side next to the inserted cutter between the lateral supporting walls and outer raised regions of the rear supporting wall resulting wedge-shaped groove, which can easily be deposited coal.

Avoid shortcomings unwanted deposition of coal dust in the transition region between the lateral and rear support walls in DE 29901985 asked to perform elevation only in the middle region of the rear supporting wall, and then the rear support wall must descend to its outer regions, resulting converted to the cutter or to the mounting pocket rear end side of the supporting wall on the outer areas has a guide surface that passes obliquely outwards to the working direction of the cutter. Since forming the backup cutter elevation stands side over the inserted cutter only slightly, between incisor, lateral supporting walls and the outer regions of the rear supporting wall not there is a significant dead space. In addition, oriented obliquely to the working direction of the cutter guide surface must ensure that coal, which is blown off toward the working direction of the cutter from its tip in the direction of the rear supporting wall, slid obliquely outward.

This tool holder although and reduced the tendency to the accumulation of coal dust in the wedge-shaped groove, but the installation of a new cutter, for example, due to wear and tear replacement of all or individual cutters difficult due to the implementation of the Oia with facing outward, reaching almost to the mounting pocket guide surfaces.

The objective of the invention is to provide a tool holder that would make a good backup of the inserted cutter, as well as quick and hassle-free mounting of the cutter.

This task in accordance with the invention is solved due to the fact that facing to the mounting pocket rear end side of the supporting wall on the outer areas are equipped with downward sloping inwards towards the mounting pocket guide surfaces as an auxiliary mounting device for chisel plow. Descending to the mounting pocket guides surface greatly facilitates the insertion of the cutter, because even installed with a slight misalignment of the cutter through the guide surfaces oriented relative to the mounting pocket. End wall is further to the rear struts cutter. At the same time, the guiding surfaces can also contribute to the removal of coal dust from the mounting pocket.

In a preferred embodiment, a lateral support wall can be performed on its upper closing surface essentially along its entire thickness flat and/or in the form of descending to the longitudinal Central plane of the mounting pockets of the bevel. Mainly two closing surfaces are thus relative to rodolniy the mid-plane angle of the bevel of about 93° . This orientation covers the surface of the side support walls improves the support is inserted in the mounting pocket of the cutter as the cutter his head on both sides of the mounting pocket can fit over a large area to the closing surfaces or to build on them. In addition, to prevent unwanted dead space between the head or shank of the cutter and the tool holder, and is achieved by the removal of coal dust. Next, the guiding surfaces can be mainly above and partially below the end surface of the side supporting walls in order to provide for the input of his cutter shank below the level of the closing surfaces.

For optimal backup cutter front support wall may be provided on the transition to closing the sides of the lateral supporting walls supporting the spout to the cutter head, with the front surface of the base of the trunk is mainly provided with a V-shaped indentation for additional lateral fixation of the head cutter. Next, the outer region of the end side of the rear supporting wall may be predominantly from top elevation to the closing parties on the guide surfaces and the adjacent outside edge surfaces of the arcuate grooved path. The allotment of coal is improved, if the tool holder according to the invention, the edge of the s surface descend obliquely backward to the lateral supporting walls, therefore, similarly to the standard holders, form a narrow, oriented obliquely to the working direction of the plane of the guide surface, which divert coal inclined outward. Narrow edge surface can be, in extreme cases, formed exclusively preferred for casting of the tool holder round transitions.

In accordance with the holder when the work load he has mainly if necessary, only slightly pronounced asymmetric design of the side support walls and outer regions of the rear support wall relative to the longitudinal mid-plane of the mounting pocket. Appropriate backup cutter formed in the rear support wall in its middle, the most elevated region has a width approximately corresponding to the width of the mounting pocket. Thus, the rear support wall in its middle region, in any case, mainly near the arcuate top of the rear supporting wall is not wider or, at least, slightly wider than inserted in the mounting pocket cutter, and the outer region does not have to be provided over the entire height formed in the rear support wall elevation, but in the preferred embodiment of the invention only where back in the zvyshennoy area of the support wall side is inserted cutter or mounting pocket i.e. in the transition region to the lateral supporting walls.

Other differences and advantages of the invention follow from the following description and drawings, in which more detail is illustrated the preferred embodiment of the invention. In the drawings shows:

figure 1 - tool holder, according to the invention, in perspective;

figure 2 - the holder of figure 1 in side view;

figure 3 - the holder of figure 1 in a front view; and

figure 4 - tool holder of figure 1 in the top view.

In the drawings, the position of the 10 designated tool holder for coal plow (not shown), in the open, at least on the upper side of the mounting pocket 1 which its shank can be inserted and suitable fixing means fixed cutter (not shown). From the lower side 2 of the tool holder 10 are two sides 3, 4, a front 5 and one 6 rear supporting wall, which limit the closed edges of the mounting pocket 1, as shown in figure 2 and 3, where the position of mounting of the pocket 1 is indicated by the dashed lines. Mounting pocket 1 is held at its front and rear, formed by the supporting walls 4, 5 of the bounding surfaces tilted back at an angle of approximately 55° relatively marked in figure 2 by the arrow And the direction of work of the plow. Educated lateral supporting walls 3, 4 side will limit the global surface mounting pocket 1 diverge at a small angle of inclination, approximately 1.8°, relative to the longitudinal mid-plane M of the mounting pocket 1, so that the mounting pocket from the lower side 2 extends slightly wedge-shaped for optimum fastening respectively made of the shank of the cutter is inserted in the mounting pocket 1 flush.

As clearly seen from the drawings, the rear support wall 6 is above the closing surfaces 7, 8 of the two lateral supporting walls 3, 4 and the front support wall 5 their portion 6A by about 1/3 of its height. Plot 6A forms, therefore, the exaltation, the end face 11 of which is pointing in the direction of a plane or facing to the mounting pocket 1, provides additional back support for outside faces inserted in the tool holder 10 of the cutter. The end face 11 has an arcuate grooved contour, as clearly seen in particular in figure 2. The end face 11 of the plot of the supporting wall or elevation 6A has a Central region 12, passing on the width of the mounting pocket 1, and two lying above the closing surfaces 7, 8 of the lateral supporting walls 3, 4 of the outer region 13, 18, provided with a downward sloping inwards towards the mounting afford 1 guide surfaces 14, 15. These guide surfaces 14, 15 are auxiliary wiring n is usposobieniem to enter in the mounting pocket 1 shank of the cutter during installation and are partially below the closing surfaces 7, 8. Both edge areas 16, 17 adjacent to the guide surfaces, respectively, from the side, i.e. at the transition to the lateral supporting walls 3, 4, descend sideways and backward and form at the expense of the lateral guide surface for removal of coal fines. As clearly seen in figure 3 and 4, the guiding surfaces 14, 15 are slightly different, so that the tool holder 10, in General, is asymmetric relative to the longitudinal mid-plane M. in Addition, the design is such that forming the backup cutter elevation 6A are carried out mainly in the middle region of the rear supporting wall 6 width approximately corresponding to the width of the mounting pocket.

The two closing surfaces 7, 8 fall outside inside to the mounting pocket 1 in the form of a bevel at an angle of approximately 3°so that the angle α the bevel is with the longitudinal middle plane M of approximately 93°. On the closing transition surfaces 7, 8 in the front support wall 5 made reference spout 20 for the front struts cutter. The front surface 21, 22 of the support spout 20 is inclined obliquely backward approximately at the same angle that the front and rear of the bounding surface mounting pocket, and converge at an obtuse angle of approximately 170°. Due to this, there is formed a V-shaped recess, which may be supported by side is in the cylinder, a cutter (not shown). Supporting the spout 20 is far behind the hole 23 for driving into the front of the supporting wall 5, so that the locking head cutter finger plow the insert can securely against the outer side of the front support wall 5.

Due to the elevation 6A backup cutter relative to the other of the support walls 3, 4, 5 are inserted in the mounting pocket 1 cutter has a particularly large contact surface, which contact pressure in this most loaded region is always relatively low and the service life of the cutter and the tool holder is increased in comparison with the known rescueme nodes. The force exerted on the tool holder by the plow, can through the protruding rear bearing surface very well understood by the tool holder, and, in particular, provide a cutter moments are well captured by the tool holder, because bóincreased compared with the prior art reference intervals resulting from the load torques below. Due to the narrow, elongated in the height of backup cutter only in the middle of the section 6A of the rear support wall 6 is reliably prevented penetration of coal between the tool holder and the shank of the cutter in the cutting area of the site, its accumulation and briquetting.

1. Tool holder for cutter coal or mining plow with the ryty on its upper side a mounting pocket for reception is executed on the cutter shank, limited by the edges of the two side, one front and one rear support walls, and the rear support wall is elevated, protruding above the adjacent lateral support walls forming a support for the cutter plane made mainly in the middle region of the rear supporting wall and downward to its outer regions, characterized in that the facing to the mounting pocket (1) the end face (11) of the rear supporting wall (6, 6A) on the external areas (13, 18) is provided with a downward sloping inwards towards the mounting pocket guide surfaces (14, 15) as Assembly accessories for chisel plow.

2. Tool holder according to claim 1, characterized in that the lateral support walls (3, 4) respectively on its upper closing surface (7, 8), formed essentially along its entire thickness flat and/or in the form of descending to the longitudinal mid-plane (M) mounting pocket (1) of the bevel.

3. Tool holder according to claim 2, characterized in that the two closing surfaces (7, 8) are relative to the longitudinal mid-plane (M) angle (a) of the bevel of approximately 93°.

4. Tool holder according to claim 2 or 3, characterized in that the guide surface (14, 15) are located above and partially below the closing surfaces (7, 8) of the side support walls (3, 4).

5. Tool holder according to claim 1, the best of the decomposing those what the front support wall (5) is provided at the transition to the closing sides (7, 8) of the side support walls (3, 4) support the spout (20) for the cutter head, with the front surface (21, 22) of the reference nozzle (20) is provided with a U-shaped recess.

6. Tool holder according to claim 1, characterized in that the outer region (13, 18) front side (11) of the rear base wall (b) are from the top elevation (6A) to the closing sides (7, 8) on the guide surfaces (14, 15) and the adjacent outside edge surfaces (16, 17) arcuate grooved path.

7. Tool holder according to claim 6, characterized in that the boundary surface (16, 17) descend to the lateral support walls (3, 4) inclined ago.

8. Tool holder according to claim 1, characterized in that the lateral support walls (3, 4) and outer region (13, 18) of the rear support wall has an asymmetrical structure with respect to the longitudinal mid-plane (M) mounting pocket (1).

Priority items:

29.12.2003 according to claims 1-8.



 

Same patents:

FIELD: mining.

SUBSTANCE: toolhead for drawknife cutter features mounting pocket open from above for receiving and supporting cutter liner limited at the ends with two lateral walls in relation to the operation drawknife direction, a front and a back supporting walls, the latter being higher than the former. One lateral support wall oriented away from breakage face during operation is higher than the front and the other lateral walls and forms a lateral cutter liner support longer than the other lateral support wall.

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