CN1219984C - Coupling with metal rubber pin - Google Patents

Abstract

A shaft coupling with metal rubber pins relates to a shaft coupling with pins made of new materials. At present, due to the limitation of the material properties of the parts, the elastic elements used to compensate the displacement in the elastic coupling cannot satisfy the fatigue life in high temperature, low temperature, large temperature difference and corrosive environment. The invention comprises a left half coupling (1), a right half coupling (2), a column pin (3) connecting the left half coupling (1) and the right half coupling (2), and the column pin (3) It is made of metal rubber material. Couplings using metal rubber pins have good high and low temperature resistance, large temperature difference resistance and corrosion resistance; and the coupling has high torque transmission capacity and long fatigue life; couplings using metal rubber pins have With the ability to compensate axial displacement, radial displacement, angular displacement and comprehensive displacement, the coupling is suitable for various working conditions, especially high temperature, low temperature, large temperature difference and corrosive environment, and has a wide range of applications.

Description

Couplings with Metal Rubber Pins

Technical Field: The present invention relates to a shaft coupling with a pin of a new material.

Background technology: Coupling is one of the very important components in mechanical devices and mechanical equipment. Its main function is to connect two shafts to realize the transmission of motion and power. It is widely used in practical engineering. As a standard part in mechanical design, there are dozens of couplings used in actual engineering. In order to ensure the normal operation of the coupling, the axes of the two shafts connected by the coupling should be strictly concentric. However, due to factors such as processing and assembly errors and force deformation, the axis of the two shafts connected by the coupling may produce various offset forms such as axial displacement, radial displacement, angular displacement and comprehensive displacement. The movable rigid coupling compensates for various displacements through the relative movement between the components of the coupling during work, while the elastic coupling uses the elastic elements contained in the coupling to compensate for various displacements. At present, most of the elastic elements used to compensate displacement in elastic couplings are non-metallic elastic materials such as rubber and nylon. The fatigue service life under the temperature difference and corrosive environment is difficult to be satisfactory. Therefore, the development of elastic couplings suitable for special working conditions such as high and low temperature, large temperature difference and corrosive environment not only has a strong ability to compensate various displacements, but also has a high bearing capacity and fatigue strength. It is one of the key problems that scholars and manufacturers in the field of mechanical engineering are trying to solve.

Summary of the invention: The object of the present invention is to provide a coupling that not only has a good ability to compensate for displacement, but also has various properties such as high temperature resistance, low temperature resistance, and large temperature difference. It includes a left half coupling 1, a right half coupling 2, the pin 3 that connects the left half coupling 1 and the right half coupling 2, the pin 3 is made of metal rubber material, and the metal rubber material is made of a wire coil with a diameter of 0.06-0.25mm The elastic element 3-1 made and the outer sheath 3-2 made of soft material wrapped outside the elastic element 3-1 are composed. The invention applies the metal rubber technology to the coupling structure, and the coupling using the metal rubber pin has good high and low temperature resistance, large temperature difference resistance and corrosion resistance; and the coupling has a higher ability to transmit torque, Long fatigue life; the coupling with metal rubber pin has the ability to compensate axial displacement, radial displacement, angular displacement and comprehensive displacement. The coupling is suitable for various working conditions, especially high temperature, low temperature and large temperature difference And corrosive environment and other working conditions, a wide range of applications. The coupling using metal rubber components is a new type of coupling with unique performance, simple structure and wide application range. It is a high-tech and high value-added product that can be widely used in various general machinery, special Machinery, heavy machinery, light machinery, national defense equipment and civilian product markets have huge development potential.

BRIEF DESCRIPTION OF THE DRAWINGS: Fig. 1 is a schematic structural diagram of the present invention, Fig. 2 is a schematic structural diagram of a metal rubber pin, Fig. 3 is a left view of Fig. 2, and Fig. 4 is a schematic structural diagram of Embodiment 2.

Specific embodiment 1: Referring to Fig. 1, Fig. 2 and Fig. 3, this embodiment includes a left half coupling 1, a right half coupling 2, and a pin connecting the left half coupling 1 and the right half coupling 2 3. The pin 3 is made of metal rubber material. The pin of the metal rubber material is an elastic element 3-1 made of a metal wire with a diameter of 0.06-0.25mm and wrapped around the elastic element 3-1. It consists of an outer sheath 3-2 made of soft material, the metal wire of the elastic element 3-1 can be stainless steel wire, steel wire, copper wire or aluminum wire, and the outer sheath 3-2 can be copper or aluminum or polytetrafluoroethylene , the metal rubber material can be made into the required shape of the pin, and the cross section of the pin 3 is circular. A retaining ring 4 is provided at the outer end of the column pin 3, and the retaining ring 4 is connected to the coupling through a screw 5. When installing, the left half coupling and the right half coupling are connected by a key to realize the connection with the circumference of the two shafts to be connected. The direction is fixed; the metal rubber pins are assembled with the pin holes at the flanges of the two halves of the coupling in the form of an interference fit. When working, the metal rubber pins bear shear loads. The number and size of the pins depend on The geometric dimensions of the coupling and the torque transmitted. The left and right retaining rings are respectively fixed on both sides of the two halves of the coupling by fixing screws to prevent the metal rubber pins from coming out of the holes during operation. An elastic washer is installed between the screw 5 and the retaining ring 4 to prevent the screws from working. When it is loose due to the action of alternating load, when installing, there is a gap between the end faces of the two half-couplings, and the axial deformation, radial deformation and bending deformation produced by the metal rubber pin after the force is used to compensate possible The resulting axial displacement, radial displacement, angular displacement and comprehensive displacement.

Specific embodiment 2: Referring to FIG. 4 , the difference between this embodiment and specific embodiment 1 is that the pins made of metal rubber are rolled from metal wires with a diameter of 0.06-0.25 mm. The manufacturing method of the elastic element 3-1 in the present invention is as follows: firstly, the metal wire is wound into a spiral coil by a special forming machine, and then the spiral coil is stretched with a fixed pitch so that the pitch is approximately equal to the diameter of the spiral coil; The spiral roll is made into a blank, and then the blank is cold-stamped.

The technical key point of the present invention is to apply metal rubber components to the structure of the coupling. The metal rubber components use metal wires as raw materials and do not contain any ordinary rubber. After being shaped by a special preparation process, the metal rubber pins have ordinary rubber With the same elasticity, it can be prepared as a hollow pin or as a solid pin. Its geometric size depends on the transmission torque required by the coupling. By adjusting the diameter of the wire, the diameter of the spiral coil, and the arrangement of the blank Process, porosity, and pin structure shape, etc., can make metal rubber pins have different stiffnesses to meet the needs of different working conditions. Correct selection of metal wire raw materials can make metal rubber pins resistant to high temperature, low temperature, Large temperature difference resistance and corrosion resistance, through the deformation performance of the metal rubber pin after being stressed, the coupling can have the ability to compensate for various displacements.

Claims (8)

1. A coupling with a metal rubber pin, which includes a left half coupling (1), a right half coupling (2), connecting the left half coupling (1) and the right half coupling ( 2) The column pin (3), characterized in that the column pin (3) is made of metal rubber material, and the column pin of the metal rubber material is rolled from a metal wire with a diameter of 0.06-0.25mm The elastic element (3-1). 2. The shaft coupling with metal rubber pins according to claim 1, characterized in that the metal rubber pins are elastic elements (3 -1) and an outer sheath (3-2) made of a soft material wrapped outside the elastic element (3-1). 3. The coupling with metal rubber pins according to claim 1, characterized in that the cross section of the pins (3) is circular. 4. The coupling with metal rubber pin according to claim 1, 2 or 3, characterized in that the metal wire of the elastic element (3-1) is stainless steel wire or steel wire or copper wire or aluminum wire. 5. The shaft coupling with metal rubber pins according to claim 2, characterized in that the outer sheath (3-2) is made of copper or aluminum or polytetrafluoroethylene. 6. The shaft coupling with metal rubber pin according to claim 1, 2 or 3, characterized in that a retaining ring (4) is provided at the outer end of the pin (3), and the retaining ring (4) is passed through the screw (5) Connect with the coupling. 7. The shaft coupling with metal rubber pins according to claim 4, characterized in that a retaining ring (4) is provided on the outer end of the pin (3), and the retaining ring (4) is connected with the screw (5) Coupling connection. 8. The shaft coupling with metal rubber pin according to claim 5, characterized in that a retaining ring (4) is provided on the outer end of the pin (3), and the retaining ring (4) is connected with the screw (5) Coupling connection.

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