Shantui Corporation obtains patent for trolley frame welding fixture; trolley frame welding fixture with both ends fixed, universal and does not affect welding

March 21 News: According to the State Intellectual Property Office, Shantui Engineering Machinery Co., Ltd. has applied for a patent titled “Welding Fixture for Carriage Frame,” with authorization publication number CN224011498U, granted on March 20, 2026. The application number is CN202422891834.8, published on March 20, 2026, filed on November 26, 2024. Inventors include He Jingli, Zhang Minghui, Ding Zhiyuan, Zhang Jinghua, Wu Shipeng, Ji Houzhan. The patent agency is Jinan Shunyuan Patent Agency Co., Ltd., with patent agent Zhao Yang. Classification codes are B23K37/00 and B23K37/047.

Patent Abstract: The utility model relates to a welding fixture for a carriage frame, belonging to the welding field. The technical solution includes a front-end fixture and a rear-end fixture. The front-end fixture comprises a fixture box, with front-end connection structures on both sides, including a first connection bolt and adjustment shims. The rear-end fixture includes a rear-end box with a connecting plate on the front face, which has multiple second connection holes fitted with second connection bolts. This design uses fixed ends at both sides; the front-end fixture extends into the interior cavity of the carriage frame and is fixed to the front end via the first connection bolt, with adjustable shims to accommodate different carriage frame models, enhancing the fixture’s versatility. The front-end fixture is located inside the carriage frame, and the rear-end fixture connects to the rear end surface, both not affecting the welding area on the outer surface of the carriage frame.

Shantui Co., Ltd. was established on December 14, 1993, and listed on the Shenzhen Stock Exchange on January 22, 1997. The company is headquartered in Jining, Shandong Province. It is a leading domestic manufacturer of construction machinery, with core businesses including bulldozers and other engineering equipment, possessing strong R&D and manufacturing capabilities.

Shantui’s industry classification is Mechanical Equipment - Construction Machinery - Complete Construction Machinery, covering sectors such as construction machinery, excavators, and machinery components. Its main business includes research, development, manufacturing, sales, leasing, maintenance, and technical consulting services for construction machinery, mining machinery, basic farmland construction machinery, harvesting machinery, and parts.

In 2025, Shantui’s revenue reached 14.62 billion yuan, ranking first among two companies in the industry, surpassing the industry average and median of 12.33 billion yuan, leading second-place Iron Construction Heavy Industry with 10.045 billion yuan. Main business revenue includes: main products of construction machinery totaling 10.95 billion yuan (74.90%), parts and other income of 2.668 billion yuan (18.25%), and supplementary income of 1.002 billion yuan (6.86%). Net profit was 1.214 billion yuan, ranking second in the industry, below the industry average and median of 1.349 billion yuan, trailing behind the top Iron Construction Heavy Industry with 1.483 billion yuan.

Recent patent applications by Shantui Engineering Machinery Co., Ltd.:

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