RU11284U1 - EFFECT ROPE CABLE - Google Patents

Abstract

The cable for the transmission of force, made in the form of a steel flexible rope, enclosed in a sheath containing inner, reinforcing and outer layers, characterized in that the inner and outer layers of the sheath are made of thermoplastic material, for example, polyethylene, the inner layer being made of thermally expanding external - from heat-shrinkable material.

Description

Ex. N

Cable for power transmission.

The utility model relates to mechanical engineering, namely, to fields of technology where flexible thrusts are used to transmit forces, for example, in small aircraft - to control elevators and directions, on cars - flexible clutch cables and brakes, on motorcycles - gas, clutch and hand brakes, on bicycles - hand brake cables and chain shifting to other gears, etc.

Known flexible rods for the transmission of force, which are currently used in various branches of mechanical engineering, are steel "anatics of twisted steel wires (strands), which are installed inside a flexible shell containing an inner layer of polymeric material, reinforcing layer in the form of a tightly twisted a metal spring made of wire and the outer layer is made of rubberized fabric, PVC compound or other similar material (see Motorcycles K-125, K-175 and their modifications. V.I. Aksenov, Yu.V. Danilov, V.K. Egorov et al. Moscow, Mash giz, 1962, p. 75).

The disadvantage of the described cable design is the fragility of the service, which is a consequence of the materials used. The polymer material ages with time, at low temperatures it becomes brittle, the rubberized fabric on the outer shell does not withstand excesses. Water and dirt trapped inside the shell will corrode the metal cable. With long interruptions in operation, the cable in the form of flexible traction can generally lose its performance.

The use of thermoplastic materials for coating the inner surface of pipes is known (see Swiss Patent No. 679845, class B 29 C 63/22, published April 30, 1992), heat-shrinkable and heat-expanding tubes are known (see Japanese Patent No. 2-1294, class. In 29 C 61/06, published on 11/08/90), as well as methods and devices for their manufacture (see Japan Patent No. 4-22134, CL 29 C 61/08, published on 04/15/92 and Japan's application N 3 -63943 according to class B 29 C 61/08, published on October 3, 91).

From the patent of the Russian Federation N 2011916 by class. F 16 L 11/08 with a priority of 1/23/90. A flexible pipe is known that comprises an elastic pipe, a reinforcing layer and an outer shell wrapped around it, the reinforcing layer being screwed in the form of a roll with the ability to seal adjacent layers, made of reinforced material and contains, at least on one side, a material with a low coefficient of friction.

The specified technical solution is the closest analogue both in terms of function and in the number of matching features and can be taken as a prototype.

The disadvantage of the prototype is the technological complexity of winding the reinforcing layer (spring of steel wire) on an elastic pipe. In addition, in the gfototype there is no outer coating of the reinforcing layer, therefore, there is no protection against the effects of harmful factors. The disadvantage of the prototype is also the low strength of the tube in compression, which leads to crushing of the tube at the attachment points, and

MPKb F 16G 9/00 F 16L 11/00 F 16С 1/26

also insufficient rigidity, which leads to sagging of the tube in the spans of meyatsyau places of attachment. In addition, the presence of a material with a low coefficient of friction does not exclude the ingress of water and dirt into the tube and, as a result, corrosion of the cable.

The task to be solved by this technical solution is to create a technological, strong, reliable and durable cable design for transmitting forces.

According to the application for a utility model, this problem is solved by the use of new materials in the construction of the cable sheath and new manufacturing technology. The shell consists of an inner, reinforcing and outer layer. The reinforcing layer is made in the form of a tightly twisted metal wire spring. The inner and outer layers of the shell are made of thermoplastic material, the inner layer of thermally expanding material, the outer layer of heat-shrinkable material.

The invention is illustrated in the drawing, which shows a General view of the cable in the shell.

The rope 1 is installed in the inner shell 2, a spring is installed on the shell 2, which is a reinforcing layer 3, on which the outer layer 4 is applied.

The manufacture of the device is carried out as follows. On a special mandrel, a dense spring of steel wire is wound, a spring of the required length is cut off and a heat-expanding tube is installed inside the spring, and a heat-shrinkable tube is outside. After that, heat is applied to the design, leading to the restoration of the set geometrical parameters of the thermoplastic material, as a result of which the inner layer, thermally expanding, creates the necessary tightness to the inner side of the reinforcing layer, and the outer layer, heat-shrinkable, seals and hardens the shell. A cable (flexible traction) of a given length with pre-applied lubricant is installed in the resulting sheath. At least one end of the casing is fitted with a metal tip with a rubber sealing cap.

The implementation of the cable to transfer the force of the proposed design allows you to provide the following advantages:

1. Simplicity of manufacturing technology. The manufacturing processes of steel cables, springs from steel wire, tubes from thermoplastic materials are mastered by the industry and do not require special expensive equipment.

2. The ability to obtain the required structural rigidity - by changing the density of the winding of the reinforcing layer and choosing the cross-sectional area of the source wire.

3. The flexibility of the cable is maintained - the thermoplastic material is elastic, with bending, the shape of the inner channel (tunnel) is preserved, where the cable moves with a minimum clearance.

4. The elasticity of the shell design allows the cable to be laid to transfer forces with a large bend without affecting the performance of the cable.

5. The inner layer of thermally expanding polyethylene has a low coefficient of friction, in addition, the presence of lubricant in the rubbing pair ensures the durability of its operation.

6. The presence at the ends of the shell of the tips with seals, or at least one tip, protects the cable from water and dirt, which increases the life of the cable.

Claims (1)

The cable for the transmission of force, made in the form of a steel flexible rope, enclosed in a sheath containing inner, reinforcing and outer layers, characterized in that the inner and outer layers of the sheath are made of thermoplastic material, for example, polyethylene, the inner layer being made of thermally expanding external - from heat-shrinkable material.