Rotary oil cylinder for lorry-mounted crane
A technology for truck-mounted cranes and slewing cylinders, which is applied to the field of slewing cylinders of truck-mounted cranes and slewing cylinders of truck-mounted cranes, and can solve the problems of time-consuming and laborious assembly, directional wear of dynamic seals, and high production costs of static seals.
Inactive Publication Date: 2012-07-04
CHANGZHI QINGHUA MACHINERY FACTORY +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Therefore, the use of threaded connections has the following disadvantages: 1. The production cost of the static seal is high, and the assembly is time-consuming and laborious
2. The piston is tightly connected with the piston rod through the thread, and the piston is easily affected by the radial force when the rack and piston rod mesh, resulting in directional wear of the dynamic seal between the piston and the cylinder, and the service life of the dynamic seal is reduced
Method used
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Embodiment Construction
[0011] Such as figure 1 , figure 2 , image 3 As shown, the rotary oil cylinder of the truck-mounted crane of the present invention includes a cylinder block 1, a piston 2 and a rack piston rod 3, and a piston 2 is respectively installed in the two cylinder blocks 1, and the two ends of the rack piston rod 3 are respectively connected to the The pistons 2 in the two cylinders 1 are connected, and each of the pistons 2 and the rack piston rod 3 is connected to a T-shaped column 4, and the two ends of the rack piston rod 3 are connected to the piston 2. There is a U-shaped slot 5 compatible with the T-shaped hanging column 4, and the two ends of the rack piston rod 3 and the piston 2 are connected through the supporting column 4 and the slot 5.
[0012] The size of the draw-in groove 5 should be moderately loose with respect to the size of the hanging post 4, so as to ensure the convenience of articulated connection; after articulated and connected, ensure that the side end f...
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The invention belongs to the technical field of hoisting, and in particular relates to a rotary oil cylinder for a lorry-mounted crane. The technical problem to be solved is to provide a rotary oil cylinder in which pistons and rack piston rods can be assembled conveniently in a labor-saving mode and the pistons are not influenced by radial force generated in the process of meshing the rack piston rods. According to the technical scheme, a connecting side between each piston and each rack piston rod is provided with a T-shaped hanging post; both connecting sides between the two ends of the rack piston rod and the piston are provided with a U-shaped clamping groove which adapts to the T-shaped hanging post; and the two ends of the rack piston rod and the piston are mutually hooked by the hanging post and the clamping grooves in a matched mode. The rotary oil cylinder is widely applied in the field of rotary oil cylinders of cranes.
Description
technical field [0001] The invention relates to a rotary oil cylinder for a truck-mounted crane, belonging to the field of rotary oil cylinders, in particular to a rotary oil cylinder for a truck-mounted crane. Background technique [0002] The rotary motion of the truck-mounted crane is realized through the rotary motion of the gear shaft driven by the rack of the rotary cylinder. The connection between the rack piston rod and the piston of the rotary cylinder is generally threaded. In order to ensure that the oil will not leak to the side of the piston rod, a sealing ring needs to be added to the joint between the piston rod and the piston for static sealing. Therefore, there are the following disadvantages in adopting threaded connection: 1. The production cost of the static seal is high, and the assembly is time-consuming and laborious. 2. The piston is tightly connected with the piston rod through the thread, and the piston is easily subjected to the radial force when ...
Claims
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Login to View More IPC IPC(8): F15B15/20F15B15/08
Inventor 王乐有牛小军宋丽娟郜普刚李凯宋理敏刘平才冬涛裴卫东
Owner CHANGZHI QINGHUA MACHINERY FACTORY