PL211352B1 - Tool for assesment of the degree of chain wear - Google Patents

Description

(12) PATENT DESCRIPTION (19) PL (11) 211352 (13) B1 (21) Application number: 383304 ^{(51) Int.Cl.}

G01B 3/24 (2006.01) G01B 3/38 (2006.01) G01B 5/14 (2006.01) (22) _{Filed on: 09/10/2007 G01B 5/30 (2006.01)} (54) Chain wear gauge

(73) The right holder of the patent: ACADEMY OF MINING AND HUTNICZA (43) Application was announced: THEM. STANISŁAWA STASZICA, Kraków, PL March 16, 2009 BUP 06/09 (72) Inventor (s): BOLESŁAW ZACHARA, Cracow, PL (45) The grant of the patent was announced: ŁUKASZ NOREK, Gawłówek, PL May 31, 2012 WUP 05/12 (74) Representative: item. stalemate. Barbara Kopta

PL 211 352 B1

Description of the invention

The subject of the invention is an apparatus for assessing the degree of chain wear, especially in lifting mechanisms of forklifts

A device is known from the Polish application P-284374 that solves the problem of chain wear control, especially chains used in mine horizontal and inclined transport. The device is characterized by the fact that the elongated handle ends with a mounting head with a through-hole. A connecting bolt connected to the measuring jaws passes through this hole and has a symmetrical measuring cutout at the bottom with a width corresponding to the minimum permissible chain link thickness. The outer spacing of the measuring jaws corresponds to the inner diameter of the controlled chain link.

Polish patent specification No. 154 429 discloses a device for measuring the elongation of a link chain under load, which has two adjustable measuring jaws pressed by springs, slidably mounted on a guide. The jaws are able to move parallel to the chain axis along the guide thanks to bearings with rolling elements. The guide has a handle for rigid fastening to one of the links of the tested chain sample. The elements of the universal inductive sensor are attached to the jaws. Constant pressure of the measuring jaws on the cells is ensured by springs.

The device according to the invention has measuring jaws, including a selected section of chain links, wherein a scale is cut on the body of the fixed jaw, parallel to the chain, cooperating with a vernier on the movable jaw. The device is equipped with a guide with sockets in which permanent magnets are mounted, allowing the device to be guided perpendicularly in relation to the chain, while the guide is mounted on a sliding arm set in a bracket. The bracket is equipped with locking elements and a pressure of the sliding element. There is also a scale on the guide arm that cooperates with a vernier cut on the arm support.

The invention is illustrated by an embodiment in the drawing which shows the tool in a plane perpendicular to the plane of the chain.

The device according to the invention has measuring jaws, including sections of chain links 1 (ladder or link) subjected to a standard tension (adopted in the inspection recommendations). On the body 2 of the fixed jaw 3, parallel to the chain, a scale is cut, cooperating with a vernier on the movable jaw 4. The device is equipped with a guide 5 with sockets 6 in which permanent magnets are mounted, allowing the device to be perpendicular to the chain, while the guide 5 is mounted on the arm 7, seated in the bracket 8. The arm 7 is fastened to the guide 5 by means of bolts and washers. The bracket is provided with locking elements and a clamp 9 of the sliding element. There is also a scale on the guide arm that cooperates with a vernier cut on the arm support.

Jaws 3 and 4 are inserted between the pins of the chain 1 on a selected section (e.g. 10 links), setting the distance and position with the guide 5, then the arm 7 is blocked with a screw and the position of the guide in relation to the chain is read on the scale marked on the arm the guide using a vernier on the arm support. This is necessary so that the setting is identical during the control measurement.

Next, the elongation of the selected link section is read on a scale marked on the body 2 using a vernier cut on the movable jaw 4. Control measurements are made on the same distance and under the same conditions.

The pitch section length value obtained using the device according to the invention can be used as comparative data each time the working chain elongation is checked, for example 1%, 2%, 3% or more of the original length.

Claims (1)

Patent claim An instrument for assessing the degree of chain wear, equipped with measuring jaws, characterized in that it has measuring jaws covering a selected section of chain links (1), where the body (2) of the fixed jaw (3) is cut parallel to the chain with a scale that cooperates PL 211 352 B1 with a vernier placed on the movable jaw (4), the device is also equipped with a guide (5) with sockets (6) in which permanent magnets are embedded, while the guide is mounted on a sliding arm (7). ), placed in the bracket (8), while the bracket is provided with blocking elements and the clamp (9) of the sliding element, the guide arm is also marked with a scale cooperating with a vernier cut on the arm bracket. Drawing