Tool holder

FIELD: mining.

SUBSTANCE: tool holder with toolhead has a cutter head in the retainer catch, the said cutler head being designed to receive a cutler capable of being inserted and replaced. The cutter head is mode in the form of a socket and is furnished with a hole for inserting the cutter. The toolhead has fixation side with retainer catch and outer side oriented opposite to the fixation side, so that during tool operation centrifugal forces are directed from the fixation side to the outer one. The retainer catch has an aperture passing through inner wall of the cutter head and forming dimensional connection to the environment, the said aperture opening the cutter head towards the outer side.

EFFECT: prevention of cutter jamming due to rock mass litter getting into the head.

8 cl, 6 dwg

 

The invention relates to a tool holder with a tool holder, which is in the fixture stops receiving element of the cutter for receiving is configured to insert into it and replace the cutter, and the receiving element is designed in the form of a slot and has a hole to enter the cutter and the tool holder has a mounting side mounting emphasis and facing away from the mounting side of the outer side, and moreover, during use of the tool centrifugal forces act in the direction from the mounting side to the outer side.

Such a device is known from DE 4322401 C2. Such tool holders are used, for example, in road milling machines, soil stabilizers, machines, mining or other

This tool holder is mounted, usually, on the base part on the surface of the milling drum. The tool holder is used for replaceable installation of the cutter in its receiving element. When this cutter is held with a gap in the receiving element, in most cases - with the help of the clamping sleeve. In this case, he can't fall out of the receiving element of the cutter, but it is held with the possibility of free rotation around its middle longitudinal axis. During use of tools cutter with its top fulfills the workpiece surface, for example surface dorogie this surface material is crushed. There large and small remote particle surface. They are removed from the area of the milling drum. Fine particles can penetrate into the region of the receiving element of the cutter. They remain there and hinder the ability of the cutter to rotate freely. Sometimes they are completely stuck cutters. Reduced ability to rotate leads to rapid wear of the cutter. If it is detected late, it also damaged the tool holder. This then causes events of the replacement.

Further, it may be disadvantageous that got into the receiving element of the cutter small particles prevents the replacement of the cutter in the receiving element of the cutter.

The objective of the invention is to provide a tool holder type mentioned at the beginning, which prevented jamming of the cutter due to trapped in the receiving element of rock mass of the waste.

This problem is solved by fixing the stop has an aperture that passes through the inner wall of the receiving element of the cutter and creates a spatial connection with the environment, and that the aperture opens, the receiving element of the cutter in the direction outer side.

Hit the receiving element of the cutter of a rock mass is transported by the rotary cutter along the longitudinal axis of the cutter in facing the cutter head direction. Thus wasnike the "suction effect", supported by periodic exposure tools. The holder now has, according to the invention, the aperture in the region of the receiving element of the cutter. It is located by the centrifugal force. If the rock mass will be entered into the receiving element of the cutter, it falls in the region of the opening and can again be removed in the surrounding environment. This preserves the ability of the cutter to rotate freely.

According to a possible variant of the invention can be provided that the receiving element of the cutter is made in the form of through slots, and is drawn from the entry opening of the cutter hole to eject and that the aperture opens, the receiving element of the cutter in the area of the hole to eject and is guided from the hole to push in the direction of the entry opening of the cutter. Then the user provides easy access to the receiving element of the tool, which allows quick and easy removal of the cutter.

According to a preferred variant embodiment of the invention provides that the receiving element of the cutter is inserted with the rod cutter and that opening is, at least, agreed with the stem end region of the receiving element of the cutter. In this design use the knowledge that caught the rock mass is transported in the direction of the axis of the cutter to the free end wiped the nya cutter. Now the aperture is located in the region of the end of the rod cutter, accumulating here rock mass can easily get into the environment.

This opening may be located, without reaching the end of the rod, reaching the end of the rod or partially overlapping the end of the rod.

Aperture can simply produce when provided that it is made in the form of through with crack-like notches, which has two parallel to each other in the direction of the longitudinal axis of the receiving element of the cutter of the bounding surface and the bounding surface have a spacing from each other, less than or equal to the diameter of the socket receiving element of the cutter, or the bounding surfaces are at an angle to each other and form an angle of less than 180°. If it is provided that the opening eliminates part of the inner wall of the receiving element of the cutter, which is less than 180° the perimeter of the receiving element of the cutter in the shape of a nest, the receiving element of the cutter is deteriorating in its support function for the inserted rod cutter only slightly.

Ease of access to the receiving element tools for dismantling tool additionally improved when provided, that the holder is fixed in the base part and the base part has a recess, which creates access for dismantling tool is enta to the receiving element of the cutter, and when this notch goes in the doorway.

Corresponding to the invention the tool holder can be designed in such a way that the holder agreed, at least one spray liquid device that introduces liquid into the receiving element of the cutter through the opening. The fluid then blurs gathering in the receiving element of the cutter of a rock mass, so that it can easily be removed through the opening.

This is especially effective when provided, that the spray liquid, the device directs a jet of fluid on the free end of the rod cutter.

Hereinafter the invention is explained in more detail through the drawings of the example implementation.

The drawings show:

figure 1 - side view in section of a tool holder with a cutting tool, tool holder and the base part,

figure 2 - shown in figure 1 the tool holder in perspective and on the back,

figure 3 - tool holder according to figure 2 in different types.

Figure 1 shows a tool holder that has a base portion 40. It can be fixed, for example welded, by means of the fastening surface 41 on the curved surface of the milling drum (not shown). The base portion 40 is inserted, the receiving element 42, which is inserted mounting the stop 11 of the holder 10. Mounting the stop 11 has lublinie 13 with a pressure surface 13.1. On a pressure surface 13.1 impact pressure screw 46 which is screwed into the internal thread of the base part 40. Pressure screw 46 is available for screw tool through the input 45 to the tool.

Pressure screw 46 acts on a pressure surface 13.1 so that the fastening prop 11 is inserted in the receiving element 42. While located on the front side in the shape of a prism the guiding surfaces 12 pressed to appropriately performed paired surfaces of the base part 40.

The design of the tool holder 10 is illustrated in more detail using figure 2 and 3. As here shown, the tool holder 10 adjacent to the fastening point 11 has a locking stop 15. It forms the rear support surface 14, which in the mounting state is applied to the mating surface 43 of the base part 40. Fixing the stop 15 has a cylindrical stop 16, which is made similar to the grooves formed in the form of circular recesses marks of wear. A cylindrical stop 16 ends, the bearing surface 18. Through the support surface 18 in the locking stop 15 is entered, the receiving element 20 of the cutter. The receiving element 20 of the cutter is made in the form of a cylindrical through-slot. It forms in the area of the supporting surface 18 hole 24 to enter the cutter and there is the hole 21 to eject.

In the FIC is IRowset the stop 15 has an opening 22. It creates a spatial connection between the external environment and the receiver element 20 of the cutter. This opening 22 opens, the receiving element 20 of the cutter to the centrifugal side of the tool holder 10. This can be clearly seen in figure 1. Tool holder 10 is converted to the base portion 40 of the mounting side and facing away from her, centrifugal direction.

During use of tools milling drum, and with it the tool holder rotate in the direction indicated in figure 1 by the arrow "A".

When this centrifugal forces which act radially outward in the direction of the centrifugal side of the tool holder 10.

As shown next, figure 1, the cutter 30 is inserted into the receiving element 20 of the tool holder 10. The cutter 30 has a cylindrical rod 31 of the cutter, which in one piece moulded head 32 of the cutter. The rod 31 of the cutter in a known manner fixed disk 35 for wear protection. It is made round and completely covers the support surface 18 of the holder 10. On facing away from the supporting surface 18 side of the head 32 of the cutter of the Central built upon the disk 35 for wear protection. The rod 31 of the cutter mounted longitudinally slotted clamping sleeve 34. It contains the locking elements 34.1, which are included in the ring groove of the rod 31 of the cutter for the formation of rotational support. The cutter 30 freely rotates p and this in the clamping sleeve 34, but held from axial loss.

When sostragivajutsja small excavation of the rock mass can get in the region of the receiving element 22 of the cutter. She finds the access region between the head 32 of the cutter and the disc 35 to protect from wear and respectively between the disc 35 for wear protection and bearing surface 18 of the holder 10. She gets these paths in the receiving element 20 of the cutter and in this case in the area between the rod 31 of the cutter and clamping sleeve 34. Due to the rotational motion and slightly limited axial play of the rod 31 of the cutter in the clamping sleeve 34 there is an effect of the pump. It pumps the rock mass in the direction of the free end of the rod 31 of the cutter. The rock mass is often also forms a sticky suspension when in the process of excavation is used coolant, for example water. The rock mass is blown due to the effect of the pump along the axis of the cutter from the hole entering the cutter in the direction of the hole to eject and at the same time towards the direction of centrifugal force until, until it comes to the free end of the rod 31 of the cutter from the intermediate region between the rod 31 of the cutter and clamping sleeve 34. Now acting here on accumulating rock mass centrifugal force to move it through the opening 22 of the receiving element 20 of the cutter.

Here are particularly the spine, what this region relative to the direction of rotation of the cutting drum is in the "shadow", namely in the area of the rear surface of the cutter 30 and the holder 10. Pushing in the direction of rotation or in the direction is not possible due to the fact, usually surrounded by a casing milling drum, because here the path obstructed by material milling and accordingly develop surface.

As figure 1 clearly shows, the aperture 22 is slightly covers the free end of the clamping sleeve 34 and together with the rod 31 of the cutter. Thus, the inference process may occur reliably. It also could be, if the aperture 22 ended the free end of the clamping sleeve 34 of the rod 31 of the cutter or was located with some offset.

The opening 22 is in spatial connection with the rear recess 44 of the base part 40.

This creates greater access to the free end of the rod 31 of the cutter. This simplifies the installation tool dismantling the visible end of the rod 31 of the cutter. It can conveniently navigate through the hole 43 to eject into the receiving element 20 of the cutter.

The invention is of course not limited to the illustrated example. You can use, for example, also the clamping sleeve 34, which does not cover the entire rod 31 of the cutter. Transportation of rock mass about what comes then is not overlapped region between the inner wall of the receiving element 20 of the cutter and the rod 31 of the cutter.

1. The tool holder with the tool holder (10), which has in fixing the focus (15), the receiving element (20) of the cutter for receiving completed with insertion and replacement of the cutter (30)and the receiving element (20) of the cutter in the shape of the socket and has a hole (24) to enter the cutter and the tool holder (10) has a mounting side mounting screws (11) and facing away from the mounting side of the outer side, and moreover while using tools, centrifugal forces act in the direction from the mounting side to the outer side, wherein the locking stop (15) has an opening (22)which passes through the inner wall of the receiving element (20) cutter and creates a spatial connection with the environment, and an aperture (22) opens a receiving element (20) of the cutter in the direction outer side.

2. The tool holder according to claim 1, characterized in that the receiving element (20) cutter made in the form of through slots, and has turned from the hole (24) to enter the cutter hole (21) for ejection, and an aperture (22) opens a receiving element (20) of the cutter in the area of the openings (21) for removing and passes from the holes (21) to push in the direction of the openings (24) to enter the cutter.

3. The tool holder according to claim 1 or 2, characterized in that the cutter (30) inserted rod (31) of the cutter in foster elem is HT (20) cutter, while the opening (22) is, at least, agreed with the stem end region of the receiving element (20) of the cutter.

4. The tool holder according to claim 1 or 2, characterized in that the opening (22) are designed as through with crack-like notches, which has two parallel to each other in the direction of the longitudinal axis of the receiving element (20) cutter bounding surface (23), and the bounding surface (23) have a spacing from each other, less than or equal to the diameter of the socket receiving element (20) of the tool, or the bounding surface (23) are arranged at an angle to each other and form an angle of less than 180°.

5. The tool holder according to claim 1 or 2, characterized in that the opening (22) excludes the portion of the inner wall of the receiving element of the cutter, which is less than 180° perimeter receiving element (20) of the cutter in the shape of a nest.

6. The tool holder according to claim 4, characterized in that the opening (22) excludes the portion of the inner wall of the receiving element of the cutter, which is less than 180° perimeter receiving element (20) of the cutter in the shape of a nest.

7. The tool holder according to any one of claims 1, 2 or 6, characterized in that the holder (10) is fixed in the base part (40)and the base part (40) has a recess (44), which creates access for dismantling tool to the hole (21) to push in Prien the m element (20) of the tool, and a recess (44) into the opening (22).

8. The tool holder according to any one of claims 1, 2 or 6, characterized in that the holder (10) is consistent, at least one spray liquid device that delivers fluid through the opening (22) in the receiving element (20) of the cutter.

Priority items:

24.06.2004 according to claims 1-8.



 

Same patents:

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