CN-117263054-B - Cylinder arm pin driving mechanism and single-cylinder bolt telescopic system

CN117263054BCN 117263054 BCN117263054 BCN 117263054BCN-117263054-B

Abstract

The invention discloses a cylinder arm pin driving mechanism which comprises a first cylinder head body arranged at one end, close to the tail of an arm support, of a telescopic cylinder barrel, a second cylinder head body arranged at one end, far away from the tail of the arm support, of the telescopic cylinder barrel, a first cylinder head body dovetail groove and a first cylinder head body cylinder pin are arranged in the first cylinder head body, a second cylinder head body dovetail groove and a second cylinder head body cylinder pin are arranged in the second cylinder head body, the driving cylinder is a double-acting piston rod cylinder, a first piston rod extends out to drive the first cylinder head body cylinder pin and the second cylinder head body cylinder pin to synchronously move, when a first piston rod retracts, the first cylinder head body cylinder pin and the second cylinder head body cylinder pin are reset through a reset spring, and when a second piston rod extends out to drive the first cylinder head body dovetail groove and the second cylinder head body dovetail groove to synchronously move, and when the second piston rod retracts, the first cylinder head body dovetail groove and the second cylinder head body dovetail groove are reset through the reset spring.

Inventors

TONG MENG
WANG XIAOHUI
CUI XIANGPO
XIANG XIAOQIANG
DONG WENBIN

Assignees

徐州重型机械有限公司

Dates

Publication Date: 20260505
Application Date: 20230506

Claims (5)

1. A cylinder arm pin driving mechanism, comprising: The telescopic cylinder barrel (12), one end of the telescopic cylinder barrel (12) close to the tail of the arm support is provided with a first cylinder head body (1), and one end of the telescopic cylinder barrel (12) far away from the tail of the arm support is provided with a second cylinder head body (19); A first cylinder head body dovetail groove (2) and a first cylinder head body cylinder pin (3) are arranged in the first cylinder head body (1), and a second cylinder head body dovetail groove (18) and a second cylinder head body cylinder pin (17) are arranged in the second cylinder head body (19); The driving oil cylinder (7), wherein the driving oil cylinder (7) is a double-acting double-piston-rod oil cylinder and comprises an oil cavity A and an oil cavity B, a piston rod I (8) is arranged in the oil cavity A, and a piston rod II (9) is arranged in the oil cavity B; The first piston rod (8) stretches out to drive the first cylinder head cylinder pin (3) and the second cylinder head cylinder pin (17) to synchronously move, and when the first piston rod (8) retracts, the first cylinder head cylinder pin (3) and the second cylinder head cylinder pin (17) are reset through a reset spring (5); the second piston rod (9) stretches out to drive the first cylinder head body dovetail groove (2) and the second cylinder head body dovetail groove (18) to synchronously move, and when the second piston rod (9) retracts, the first cylinder head body dovetail groove (2) and the second cylinder head body dovetail groove (18) are reset through a reset spring (5); the first piston rod (8) is abutted with a pressing rod (14), the pressing rod (14) is connected with a partition board b (6) and communicated with the first cylinder head cylinder pin (3), and the second cylinder head cylinder pin (17) is communicated with the partition board b (6) through a connecting plate b (13) and a long pull rod; The piston rod II (9) is abutted to a connecting plate a (11), the first cylinder head dovetail groove (2) is communicated with the connecting plate a (11) through a pull rod a (10.1) and a pull rod b (10.2), the pull rod a (10.1) and the pull rod b (10.2) are connected with a partition plate a (4) at one end close to the first cylinder head dovetail groove (2), the second cylinder head dovetail groove (18) is communicated with the connecting plate a (11) through a long pressing rod, and the reset spring (5) is arranged between the partition plate a (4) and the partition plate b (6).
2. The cylinder arm pin driving mechanism according to claim 1, wherein the movement start and target positions of the partition a (4) and the partition b (6) are provided with detection switches for detecting the positions of the partition a (4) and the partition b (6).
3. The cylinder arm pin driving mechanism according to claim 1, wherein the long tie rod includes a long tie rod a (16.1) and a long tie rod b (16.2), the long tie rod a (16.1) is provided between the connection plate b (13) and the top of the partition plate b (6), and the long tie rod b (16.2) is provided between the connection plate b (13) and the bottom of the partition plate b (6).
4. The cylinder arm pin driving mechanism according to claim 1, wherein the long pressing rod comprises a long pressing rod a (15.1) and a long pressing rod b (15.2), the long pressing rod a (15.1) is arranged between the second cylinder head body dovetail groove (18) and the top of the connecting plate a (11), and the long pressing rod b (15.2) is arranged between the second cylinder head body dovetail groove (18) and the bottom of the connecting plate a (11).
5. A single cylinder latch telescopic system comprising a cylinder arm pin drive mechanism as claimed in any one of claims 1 to 4.

Description

Cylinder arm pin driving mechanism and single-cylinder bolt telescopic system Technical Field The invention relates to a cylinder arm pin driving mechanism and a single-cylinder bolt telescopic system, and belongs to the technical field of cranes. Background The single-cylinder bolt type crane boom has the typical characteristics of no limitation of the length of the boom, smooth section change of the crane boom, high hoisting performance and the like, and is widely applied to the crane industry. The traditional single-cylinder bolt type telescopic mechanism is characterized in that a single cylinder head body is assembled on a telescopic cylinder to realize telescopic action of an extension arm, the stroke of the telescopic cylinder is larger than the maximum stroke of each section of extension arm, so that the cylinder can realize such a large stroke and can push the extension arm to stably extend, the cylinder rod and the cylinder barrel of the cylinder are required to be thick and long, and a larger oil tank is required to be arranged to provide more oil. This results in high cylinder costs and excessive crane loading weight. The later stage is improved to the drawback of the telescopic machanism of single cylinder head body, derives the telescopic machanism of two cylinder head bodies, namely assembles two cylinder head bodies around on the telescopic cylinder, adopts the mode of relay around to realize the telescopic action of hoist arm. Therefore, the length of the oil cylinder can be shortened, the diameter and the rod diameter of the oil cylinder are reduced, the cost of the oil cylinder is reduced, the size of an oil tank can be reduced, the loading weight is reduced, the lifting capacity is improved, and the crane is designed to have more playing space. The actuating mechanisms of the two cylinder head bodies in the prior art are completely independent, and the synchronization of the actions is ensured only by a common hydraulic oil source. The cylinder pin and the dovetail groove of the two cylinder head bodies are driven by two sets of driving elements, and the motion positions of the two driving elements are detected by the sensors. In the technical scheme of the existing telescopic system, synchronous action of cylinder pins of two cylinder head bodies and synchronous action of dovetail grooves of the two cylinder head bodies are required, and the action mechanisms of the two cylinder head bodies are independent and can only realize synchronization by means of a hydraulic system, namely, the two cylinder pin driving cylinders or the dovetail groove driving cylinders are synchronously supplied with pressure oil; In the scheme of the existing double-cylinder head body, the front cylinder head body mechanism and the rear cylinder head body mechanism are mutually independent, and a common driving oil source is adopted to realize synchronous action of the two cylinder head bodies. In the scheme, the detection of the position of the cylinder arm pin of each cylinder head body depends on two detection switches respectively, and 8 detection switches are needed for the front cylinder head body and the rear cylinder head body. In practical use, because the detection switches are more, the single detection unit formed by the detection switches cannot strictly ensure the reliability, and the reliability of the detection system of the whole telescopic system is lower. The arrangement of the double cylinder head body makes it necessary to place one of them in the front section of the cylinder, far away from the tail of the arm support, the maintainability is extremely poor. The two cylinder head bodies share two sets of driving elements and two sets of position detection elements, so that the cost is high, and the reliability is not as high as that of one set. Disclosure of Invention The invention aims to provide a cylinder arm pin driving mechanism and a single-cylinder bolt telescopic system, which are used for solving the defects of poor reliability and high cost caused by excessive elements in the prior art. A cylinder arm pin drive mechanism comprising: The telescopic cylinder barrel is provided with a first cylinder head body at one end close to the tail of the arm support, and a second cylinder head body at one end far away from the tail of the arm support; The first cylinder head body is internally provided with a first cylinder head body dovetail groove and a first cylinder head body cylinder pin; The driving oil cylinder is a double-acting double-piston-rod oil cylinder and comprises an oil cavity A and an oil cavity B, wherein a piston rod I is arranged in the oil cavity A, and a piston rod II is arranged in the oil cavity B; the first cylinder head body cylinder pin and the second cylinder head body cylinder pin are driven to synchronously move by the extension of the piston rod I, and when the piston rod I is retracted, the first cylinder head body cylinder pin and the second cylinder head bod