CN-121993201-A - Rotatable tool apron device

Abstract

The invention belongs to the technical field of mining equipment, and discloses a rotatable tool apron device which comprises a tool apron, wherein an inner hole is formed in the tool apron, a mounting sleeve is embedded in the inner hole and used for mounting the tool sleeve, a bearing structure is arranged between the mounting sleeve and the inner side wall of the inner hole, a positioning seat is arranged between the top of the mounting sleeve and the bearing structure, and a retainer ring is arranged between the bottom of the mounting sleeve and the bottom of the inner hole. According to the technical scheme, the structure of the tool apron is changed, the direct contact between the tool sleeve and the inner hole of the tool apron in the rotation process is avoided, friction and abrasion are further reduced, and the reaming problem caused by the abrasion of the inner hole of the tool apron is reduced.

Inventors

• LIU DONGYU
• HUANG QIULAI
• GAO HONGWEI
• MA ZIYAO
• JIANG NING
• CAO YANG
• ZHU HONG
• TAO RONG
• LI SONGMEI

Assignees

• 天地上海采掘装备科技有限公司
• 中煤科工集团上海有限公司

Dates

Publication Date

20260508

Application Date

20260309

Claims (4)

1. 1. The rotatable tool apron device is characterized by comprising a tool apron (1), wherein an inner hole is formed in the tool apron (1), an installation sleeve (2) is embedded in the inner hole, the installation sleeve (2) is used for installing a tool sleeve, a bearing structure (4) is arranged between the installation sleeve (2) and the inner side wall of the inner hole, a positioning seat (3) is arranged between the top of the installation sleeve (2) and the bearing structure (4), and a retainer ring (5) is arranged between the bottom of the installation sleeve (2) and the bottom of the inner hole.
2. 2. The rotatable tool apron device according to claim 1, wherein the inner wall of the inner bore is of a three-stage step structure, comprising a first step, a second step and a third step which are sequentially arranged from top to bottom, wherein the first step is used for supporting the top of the mounting sleeve (2), the second step is used for mounting the positioning seat (3), and the third step is used for mounting the bearing structure (4).
3. 3. A rotatable holder device according to claim 1, characterized in that a predetermined gap is provided between the top end of the mounting sleeve (2) and the top end of the inner bore.
4. 4. A rotatable holder arrangement according to claim 1, characterized in that the hardness of the mounting sleeve (2) is 50HRC or more.

Description

Rotatable tool apron device Technical Field The invention belongs to the technical field of mining equipment, and particularly relates to a rotatable tool apron device. Background At present, the underground coal mine is mined by adopting a mechanical fully-mechanized mining mode, and the quality of the coal cutting performance of a cutter device of the coal mining machine serving as one of the three machines directly influences the production efficiency of a coal mining working face. The coal cutter widely used in coal mining machines consists of a cutter holder, a cutter sleeve and a cutter, wherein the cutter sleeve and the cutter holder are in clearance fit or transition fit, the tail end of the cutter sleeve is fixed by a clamping ring, and the cutter sleeve can freely rotate in the cutter holder in the fit mode. In the cutting process, the cutter sleeve rotates relative to the cutter seat to enable the inner hole of the cutter seat to be subjected to sliding friction continuously, the inner hole of the cutter seat is worn too fast finally, a reaming phenomenon occurs, the cutter swings in the cutter seat, the cutting performance is greatly reduced, the cutter seat is generally fixed in a welding mode, maintenance is difficult to be carried out underground, and the production efficiency of a mining side is greatly influenced. If the knife sleeve is tightly matched with the knife holder, the knife is difficult to rotate in the cutting process, single-sided cutting is always kept, the abrasion of the knife head is accelerated, and the service life of the knife is reduced. In view of the above, the present invention provides a rotatable tool holder device. Disclosure of Invention The present invention is directed to a rotatable tool holder device, which solves the above-mentioned problems of the prior art. In order to achieve the above purpose, the invention provides a rotatable tool apron device, which comprises a tool apron, wherein an inner hole is formed in the tool apron, a mounting sleeve is embedded in the inner hole and used for mounting the tool sleeve, a bearing structure is arranged between the mounting sleeve and the inner side wall of the inner hole, a positioning seat is arranged between the top of the mounting sleeve and the bearing structure, and a retainer ring is arranged between the bottom of the mounting sleeve and the bottom of the inner hole. Optionally, the inner wall of hole is tertiary step structure, including top-down first step, second step and the third step that sets gradually, first step is used for supporting the top of installation cover, the second step is used for installing the positioning seat, the third step is used for installing bearing structure. Optionally, a preset gap is arranged between the top end of the mounting sleeve and the top end of the inner hole. Optionally, the hardness of the mounting sleeve is greater than or equal to 50HRC. The invention has the technical effects that: The rotatable tool apron device is designed in a structural innovation mode for the tool apron device of the cutter of the coal mining machine, on one hand, a bearing structure is introduced, sliding friction of a tool apron by a tool apron is changed into rolling friction, abrasion is reduced, rotatability of the tool apron is guaranteed, on the other hand, a structure convenient for replacing the tool apron is added, maintenance convenience of the tool apron device is improved, and service life of the tool apron device is prolonged. Drawings In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings: Fig. 1 is a schematic diagram of the overall structure in an embodiment of the present invention. The reference numerals indicate that 1, a tool apron, 2, a mounting sleeve, 3, a positioning seat, 4, a bearing structure and 5, a retainer ring. Detailed Description In the following, a technical solution in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts are with