Hydraulic cylinder with bidirectional double-mechanical locking at any position
A mechanical locking, any position technology, applied in the field of hydraulic cylinders, can solve the problems of difficult assembly, limited axial bearing capacity, limited maximum speed of the piston rod, etc., achieving easy implementation, reliable locking, and increased axial locking force. Effect
Pending Publication Date: 2019-04-05
HUST WUXI RES INST
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Problems solved by technology
But both have their own disadvantages: the sleeve type and the internal expansion type are not easy to assemble, and the maximum speed of the piston rod will be limited by the high ambient temperature; the surface of the brake disc type piston rod is easy to wear and has a low life; The friction type has limited axial bearing capacity, requires high machining accuracy, and the cylinder wall is easily damaged; the snap ring type cannot be locked at any position
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[0024] The present invention will be further described below in conjunction with specific drawings and embodiments.
[0025] The present invention proposes a hydraulic cylinder capable of realizing two-way double mechanical locking at any position, such as figure 1 As shown, it includes: piston rod 1, cylinder rear end cover 21, cylinder front end cover 22, housing 3, spring 4, outer bushing 5, piston 6, inner bushing 7, cylinder barrel 8;
[0026] Piston rod 1 enters cylinder barrel 8 through cylinder barrel rear end cap 21, cylinder barrel rear end cap 21 and cylinder barrel front end cap 22 respectively connect and seal the rear end and front end of cylinder barrel 8; cylinder barrel rear end cap 21 and piston The gap fit between the rods 1 and a sealing ring are provided to prevent hydraulic oil leakage in the rod chamber B of the oil cylinder, and at the same time, the rear end cover 21 of the cylinder and the cylinder 8 can move relative to the piston rod 1;
[0027] Th...
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The invention provides a hydraulic cylinder with bidirectional double-mechanical locking at any position. The hydraulic cylinder comprises a piston rod, a cylinder barrel rear end cover, a cylinder barrel front end cover, a shell, springs, an outer lining, a piston, an inner lining and a cylinder barrel; the outer lining is pushed through the springs in the cylinder barrel to act on the inner lining through a conical surface to enable the inner lining to contract and hold the cylinder barrel tightly, and meanwhile, the locking cylinder barrel generates elastic deformation under the action of aradial force to hold the piston tightly, so that double locking is achieved, an axial locking force of the oil cylinder is greatly increased, and locking is more reliable. Elastic force generated bythe compression deformation of the springs is converted into axial locking of the hydraulic cylinder barrel, namely when a hydraulic system is stopped, the hydraulic cylinder can be locked, and hydraulic cylinder locking does not need an extra high-pressure oil source. The hydraulic cylinder has the advantages of a traditional hydraulic cylinder locking device, and can bear larger axial loads in the meanwhile.
Description
technical field [0001] The invention belongs to the technical field of actuator mechanical locking in a hydraulic system, in particular to a hydraulic cylinder capable of realizing bidirectional double mechanical locking at any position. Background technique [0002] With the wide application of hydraulic cylinders, the hydraulic locking circuit cannot solve the piston slippage and stability problems caused by the inevitable internal leakage of hydraulic cylinders, and can only be used in occasions where the locking and positioning requirements are not high. For occasions that require high locking positioning and long-term reliable locking under load, mechanical locking hydraulic cylinders must be used. At present, the more commonly used hydraulic cylinder mechanical locking methods in the market are: sleeve type, brake disc type, steel ball friction type, roller friction type, internal expansion type, snap ring type, etc. But both have their own disadvantages: the sleeve t...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F15B15/14F15B15/26
CPCF15B15/1423F15B15/26F15B2015/268
Inventor 刘银水侯宝宝朱壮
Owner HUST WUXI RES INST