CN-224228665-U - Vibration-proof fixing device for long screw of coal mining machine

Abstract

The utility model relates to a vibration-proof fixing device for a long screw of a coal mining machine, and belongs to the technical field of coal mining machines. The utility model provides a coal-winning machine long screw rod antivibration fixing device, includes fixed subassembly, sets up in long screw rod mounting groove along long screw rod axial both sides, fixed subassembly orientation long screw rod's faying surface have with long screw rod opposite face assorted shape, so that fixed subassembly passes through the faying surface press from both sides tight in long screw rod's both sides. The vibration-proof fixing device is simple and reliable in structure, convenient to process and manufacture, high in applicability, high in flexibility and high in popularization, and the vibration-proof fixing device can be adjusted and arranged according to vibration impact of coal mining machines of different types and working conditions and natural frequency conditions of the long screw.

Inventors

• Quan Baochao
• YUE NANGENG
• HU TAO
• DENG XIN
• LU MING
• XU MINGQUAN
• YANG GUANG
• LI SONGMEI
• ZHANG LINGFENG
• WANG CHAO
• QIAN ZHUANGZHUANG
• GAO ZHENBANG
• LIU ZHEN

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

20260512

Application Date

20250603

Claims (6)

1. 1. The utility model provides a coal-winning machine long screw rod antivibration fixing device, its characterized in that includes fixed subassembly, sets up in long screw rod mounting groove along long screw rod axial both sides, fixed subassembly orientation long screw rod's faying surface have with long screw rod opposite face assorted shape, so that fixed subassembly passes through the faying surface press from both sides tight in long screw rod's both sides.
2. 2. The shearer long screw vibration-proof fixture of claim 1, wherein said fixture assembly comprises a mounting block and a fixture block; The fixing block is abutted against the long screw rod, and the joint surface of the fixing block facing the long screw rod is provided with a shape matched with the opposite surface of the long screw rod; Two opposite side surfaces of the mounting block and the fixing block, which are close to each other, are matched inclined surfaces, and the inclined surfaces incline from the direction away from the long screw mounting groove to the groove bottom direction of the long screw mounting groove; The fixing blocks are fixed in the long screw rod mounting grooves, so that the fixing blocks are clamped on two sides of the long screw rod.
3. 3. The long screw vibration-proof fixing device of the coal mining machine according to claim 2, wherein the bottom of the fixing block is abutted to the bottom of the long screw installation groove, and a gap is reserved between the bottom of the installation block and the bottom of the long screw installation groove.
4. 4. The vibration-proof fixing device for the long screw of the coal mining machine according to claim 2 or 3, further comprising a fastening screw, wherein a mounting hole is formed in the fixing block, and the fastening screw penetrates through the mounting hole to fix the fixing block in the long screw mounting groove.
5. 5. The vibration-proof fixing device for the long screw of the coal mining machine, according to claim 4, is characterized by further comprising a locking washer, wherein the mounting hole is a T-shaped hole, and the locking washer is sleeved on the screw of the fastening screw and is accommodated in a big hole of the T-shaped hole.
6. 6. A shearer loader long screw vibration prevention fixture according to any one of claims 1-3, wherein said fixture assemblies are symmetrically disposed along said long screw.

Description

Vibration-proof fixing device for long screw of coal mining machine Technical Field The utility model relates to the technical field of coal mining machines, in particular to a long screw vibration-proof fixing device of a coal mining machine. Background The coal mining machine is an important device for underground fully-mechanized coal mining face coal mining, and currently a double-drum type electric traction coal mining machine is commonly used, and rides on a scraper conveyor to reciprocate so as to cut and load the face coal. In order to improve the reliability of the coal mining machine, the coal mining machine is often divided into five parts of a left cutting part, a right cutting part, a left traction part, a right traction part and a middle electric cabinet according to the structural function, wherein the left traction part, the right traction part and the middle electric cabinet are positioned and fixed by a round cake pin and are tensioned by a long screw rod, and the three parts are commonly called as a middle machine body three-section. The machine body of the coal mining machine is of a flat structure, when the roller of the coal mining machine cuts coal, the machine body can generate vibration deformation, and particularly when the roller cuts more gangue and the weight of the coal mining machine is lighter, the roller generates strong impact vibration, so that the machine body vibrates. The long screw rod can also generate stretching deformation and impact vibration due to the cantilever structure, so that the nut is loosened, even the long screw rod is broken and fails, and the safety production of the mining square is seriously influenced. As shown in fig. 1, the coal mining machine comprises a left cutting part 1, a machine body 2 and a right cutting part 3, wherein the machine body 2 comprises three modules of a left traction part 21, an electric cabinet 23 and a right traction part 25, and the three modules are usually fixedly connected through a short screw rod assembly 22 and a long screw rod assembly 24 (shown in fig. 2). The long screw 241 is stressed by nuts at two ends to tightly pull the three sections of the machine body, but the middle part of the long screw is in a suspended state mostly due to manufacturing errors and convenient maintenance (as shown in fig. 3 and 4). When hard rock is cut by the roller of the coal mining machine to generate strong vibration impact, the machine body vibrates and deforms, resonance occurs when the vibration frequency is close to or the same as the natural frequency of the long screw rod, so that the long screw rod vibrates strongly, the stress of threads at the joint of the two ends of the long screw rod and the nut is increased, stress concentration is generated, fatigue fracture failure is fast caused, the nut is loosened, and safety risks exist. Therefore, the rigidity of the long screw needs to be improved, the natural frequency is improved, and the resonance point is avoided. The prior common practice is to add a rubber pad or a pressing plate for fixing. However, in actual use, the rubber pad has small rigidity, large volume and easy aging, and the pressing plate is fixed and loosened due to vibration of the screw, so that the effect is poor, and the vibration resistance problem cannot be well solved. Disclosure of Invention The utility model aims to solve the problems and provides a vibration-proof fixing device for a long screw of a coal mining machine. The purpose of the utility model is realized in the following way: The utility model provides a coal-winning machine long screw rod antivibration fixing device, includes fixed subassembly, sets up in long screw rod mounting groove along long screw rod axial both sides, fixed subassembly orientation long screw rod's faying surface have with long screw rod opposite face assorted shape, so that fixed subassembly passes through the faying surface press from both sides tight in long screw rod's both sides. Wherein, the fixed component comprises a mounting block and a fixed block; The fixing block is abutted against the long screw rod, and the joint surface of the fixing block facing the long screw rod is provided with a shape matched with the opposite surface of the long screw rod; Two opposite side surfaces of the mounting block and the fixing block, which are close to each other, are matched inclined surfaces, and the inclined surfaces incline from the direction away from the long screw mounting groove to the groove bottom direction of the long screw mounting groove; The fixing blocks are fixed in the long screw rod mounting grooves, so that the fixing blocks are clamped on two sides of the long screw rod. The bottom of the fixing block is abutted to the bottom of the long screw rod mounting groove, and a gap is reserved between the bottom of the mounting block and the bottom of the long screw rod mounting groove. The fixing block is provided with a fixing hole, and the fixing block is