ES2322397T3 - CUTTING HEAD WITH FAST BLADE SPARE SYSTEM. - Google Patents

Abstract

The head has a fast knife replacement system consisting of a lever tool (9), which acts upon gibbs for making the gibbs to go down by inserting respective rods on cutter head tops. A magnet tool (1) acting directly upon knives allows the insertion or removal of the knives in a space open by the lever tool. A main body is composed of a lathe-turned and rectified steel cylinder with slots for the gibbs and the knives, and a boring is provided at the tops to receive discs (10).

Description

Cutting head with quick replacement system of blades.

Area of the invention

The present invention makes reference, generically, to equipment for cutting wood and in particular to change the blades of cutting heads with those that have the planers of one, two, three or four sides and that also can be used to machine other materials that can be brushed, such as plastics, hardwood, density wood half and cork, among others.

Summary of the Invention

The new blade replacement system for detailed cutting heads in the present invention was conceived taking into account a series of objectives, such as the following:

to)

He rapid replacement of the blades of the cutting head, by means of a tool system consisting of a tool that act as a lever and another tool that works by way of magnet;

b)

He saving of operating time given the efficiency of system;

C)

He assembly and disassembly of the blades without touching them with the hand, which therefore provides total physical security to the operator.

The rapid blade replacement system of the cutting head described in the present invention is composed mainly of two special operating tools and of the change carried out in the main cylindrical body of the Cutting head.

Background of the invention

There are various tools for heads of cutting known in the state of the art such as, for example, the US patent 2002/174912 provides a basic assembly for a portable planer that has a base structure, a plate structure and multiple fasteners, where fasteners attach the plate structure to the structure base so that the plate structure is supported by the support surface. However, this technology continues without provide free area elements for a replacement action Quick tools on certain pins.

In US 6279444 another one is described cutting tool in which, to change the blade, the closure  of the clamping jaw is made by means of a bolt spring-loaded that snaps into a concavity that found in the clamping jaw. This solution is also visibly different from the present invention.

Brief description of the drawings

Fig. 1 shows an exploded view in perspective of the cutting head;

Fig. 2 shows a partial view from above. from the top of the cutting head (12);

Fig. 3 shows a series of views of the lever tool (9);

Fig. 4 shows a series of views of the magnetized tool (1);

Fig. 5 shows a perspective view of the whole system;

Fig. 6 shows a top view with a detail of how the lever tool (09) works;

Fig. 7 shows a view with the unlocking representation;

Fig. 8 shows the profile of the blade (02).

Detailed description

The quick blade replacement device It consists of two tools. The first, the lever tool (09), is an arm composed of a central bar and two ribs fixed at its ends with the appropriate configuration; this bar It is of variable length since it adapts to the length of the cylinder of the cutting head, and the arm is used to unlock the knife. The ribs are rectangular in shape and in the form of concavity (a) at one end to allow adjustment in the cutting head and lean on support pins. The second tool, the magnetized tool (01), is a handle that consists basically of a rectangular frame, which has a magnet attached to the end whose function is to attract the blade (02) and either to remove it from the slot in which it is housed or to place it there.

The cutting head is completed with two discs circular steel (10) that are located at the ends of the cylinder and that are fixed with screws (6) to said head of cut. These discs (10) are turned to a medium thickness to leave free access space (b) for the tool entry, the which will work on the cotter pins (03) introduced in the inner sides of the discs (10) and at the ends of the cotters (04).

Designed in this way, the cutting head with rotating movement can be internally perforated to use it on the solid shaft of a planer, or you can also be built in solid steel and with an embedded shaft, with bearings and pulley. Depending on their diameter, the heads of cut could have 2, 3, 4, 5, 6, 8, 10 or 12 blades (02).

The blades of the cutting head are blades profiled (02) in fast cutting steel (HSS) English) with 16% or 18% tungsten (W) tempered and ground with flat and double cut configuration, to be inserted in the slots (11) and fastened with the aforementioned keys (04) previously. The steel blades (02) configuration adjusted, which have a trapezoid profile with a recess in the smaller parallel side, they will take the form of the wall profile inside the head slot (11), as they are tightened by the pressure exerted by the key (04).

Description of the process of operation of the tools

The fast blade replacement system now Revealed can be described as follows:

Each blade (02) can be inserted or removed of the cutting head in an easy and fast way without needing that the operator must touch it with his hands.

For this purpose two have been developed specific tools (Fig. 3 and 4): the tool (09) (Fig. 3 and 7) is inserted with one hand at the ends of the head of cut until the tool is locked in the recess (a) having reached the cotter pins (03) (Fig. 1 and 2) located at the ends of the key (04) (Figure 1 and 2), then producing a lever movement (pushing the bar from the tool down) (Fig. 7); the pressure exerted on the back of the tool ribs against the pins (13) (Fig. 1 and 7) located on the discs (10) (Fig. 1 and 5) make the key (04) (Fig. 1 and 2) descend in all its length. Holding the magnetized tool (01) (Fig. 4) with the another hand, the magnet should be placed near the blade (02) to attract it and then change it in the free access space (b of the Fig. 6). Finally, the tool must be loosened and removed. lever (09) previously inserted, thus allowing the rectangular steel bars (07) (Fig. 1) located at the base of the cutting head drive the key lift (04), efficiently positioning the blade (02) in its respective place; The tools can then be removed.

Description of the preferred embodiments

In order to better understand the invention, we describe below as a non-limiting example a  preferred embodiment of the cutting head and tools according to the present invention, referring to the drawings Attached with the figures they represent:

Fig. 1: a perspective view, with the pieces separated, schematically showing the main body, a cutting head blade (02), a fixing key (04), the two end disks (10); the tools to change the knife; the rectangular arched steel bars (7) and the screws (5);

Fig. 2: a partial view of the upper part of the cutting head showing the profile of the grooves (11) of the main body, a key (04) in position with the blade (02) and the replacement movements of the blade (02) and the key actuation devices (04);

Fig. 3: a view of the lever tool (09) that drives the key (04) and allows the release of the blade (02), relating the recesses (a) of the tool lever with the cotter pins (03);

Fig. 4: a view of the tool that removes or put the blade (02) in place;

Fig. 5: a perspective view of the entire system, with the blades of the cutting head, the keys clamp (04) inserted into the grooves (11) of the body main (08) and blade replacement tools (02) in operating position;

Fig. 6: a view that shows in detail how the unlocking tool works, making the key (04) descend and creating a free access space (b) to the blades (02);

Fig. 7: a view showing the movement that must be run on the release lever tool (09) so that it lowers the key (04).

Fig. 8: shows the profile of the blade (02) a use.

Referring to the drawings, Fig. 1 shows you can see the main body (08) consisting of a cylinder of turned and ground steel, with grooves (11) for the keys (04) and blades (02), and perforated (12) at the ends for fit the discs (10). The unlock lever tool of the blade (02) in Fig. 3, inserted in the remaining space between the ends of the key (04) and the discs (10) in Fig. 5 and pressed down the key (04).

Claims (5)

1. Cutting head with rapid blade replacement system for planers of wood and similar materials that require brushing, with a main body (08) consisting of a turned and ground steel cylinder, with slots (11) for the keys (04) for fastening the blades, and blades (02), characterized by a blade application system for cutting head composed of two circular steel discs (10) lowered on the inner side and screwed to each end of the cutting head, with pins (13) on the inner side whose amount is equivalent to the amount of the blades (02) and the cotter pins (03) located at the two ends of the keys (04), which allows, with the use of tools, the release and replacement of the blades (02) from a free access space (b). 2. Cutting head according to claim 1 characterized in that the keys (04) act on the blades (02) when pressed by the rectangular steel bars (07). 3. Cutting head according to claim 1 characterized by the use of a lever tool (09) which, by inserting the respective ribs into the upper parts of the cutting head and exerting pressure, acts on the keys (04) causing them to descend to, in this way, open the space (b) where the blade (02) will be inserted. 4. Cutting head according to claim 1 characterized by the intended use of a magnetized tool (01) which, acting directly on the blade (02), allows the insertion or removal of the same blade (02) in the open space ( b) by the lever tool (09). 5. Cutting head according to claim 1 characterized by blades (02) of fast cutting steel with 16% or 18% tungsten (W), whose profile is a trapezoid with a recess in the smaller parallel side.