Low-friction high-precision constant-force spring hanger

Abstract

The utility model discloses a low-friction high-precision constant-force spring hanger, which comprises a fixed frame and is characterized in that a roller component, a cam component, an auxiliary spring component, a load component and an adjusting bolt component are arranged in the fixed frame. The auxiliary spring assembly is provided with an auxiliary spring outer limiting ring, an auxiliary spring and an auxiliary spring pressing plate. The load assembly is provided with a main spring upper limiting ring, a main spring, a load pipe and a main spring lower limiting ring. Through radial limiting of the auxiliary spring and the main spring, the problems of deflection of the roller assembly and friction between the main spring and the load pipe are solved, and the constancy degree of the spring hanger is improved.

Description

Technical Field

[0001] The utility model relates to a low-friction, high-precision, constant-force spring hanger for use in industries such as chemical industry, thermal power and nuclear power, and belongs to the technical field of hoisting equipment. Background Art

[0002] Constant force spring hanger is a mechanism that provides a constant load to the equipment as it moves up and down, and is mainly used in chemical, thermal power and nuclear power industries. The current constant force spring hanger mainly adopts the force balance type, but the friction force will destroy the force balance relationship, thus affecting the constancy of the constant force spring hanger.

[0003] Utility Model Patent 201620640424.9 Force-balanced high-precision long-stroke constant-force spring hanger uses polytetrafluoroethylene pads at both ends of the bearing seat at the bottom of the cam, and nylon spacers at both ends of the locking pin in the guide roller assembly to reduce the friction between the bearing seat and the fixed frame, while ensuring that the guide roller does not deflect when moving up and down. However, it ignores the deflection of the roller assembly caused by improper auxiliary spring limitation, and the increase in friction between the main spring and the load tube caused by improper main spring limitation. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings and provide a high-precision constant-force spring hanger with small friction and high stability.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A low-friction and high-precision constant-force spring hanger comprises a fixed frame, and is characterized in that a roller assembly, a cam assembly, an auxiliary spring assembly, a load assembly, and an adjusting bolt assembly are arranged in the fixed frame.

[0007] Furthermore, the auxiliary spring assembly is provided with an auxiliary spring outer limiting ring, an auxiliary spring, and an auxiliary spring pressure plate.

[0008] Furthermore, the load assembly is provided with a main spring upper limit ring, a main spring, a load tube, and a main spring lower limit ring.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] 1. An auxiliary spring outer limit ring and an auxiliary spring pressure plate are arranged in the auxiliary spring assembly to prevent the deflection of the roller assembly caused by radial displacement during the extension and contraction of the auxiliary spring.

[0011] 2. The main spring upper limit ring and the main spring lower limit ring are set in the load assembly to prevent the friction between the main spring and the load tube caused by the radial displacement during the expansion and contraction of the main spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1 - fixed frame 2 - roller assembly 3 - cam assembly 4 - auxiliary spring assembly 5 - load assembly 6 - adjustment bolt assembly 41 - auxiliary spring outer limit ring 42 - auxiliary spring 43 - auxiliary spring pressure plate 51 - main spring upper limit ring 52 - main spring 53 - load tube 54 - main spring lower limit ring DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer definition of the protection scope of the present invention.

[0015] like Figure 1 As shown, a low-friction and high-precision constant-force spring hanger comprises a fixed frame 1, characterized in that a roller assembly 2, a cam assembly 3, an auxiliary spring assembly 4, a load assembly 5, and an adjustment bolt assembly 6 are arranged in the fixed frame 1.

[0016] The auxiliary spring assembly 4 is provided with an auxiliary spring outer limiting ring 41, an auxiliary spring 42, and an auxiliary spring pressure plate 43. When the hanger is working, the auxiliary spring 42 generates axial displacement. By providing the auxiliary spring outer limiting ring 41 and the auxiliary spring pressure plate 43, the radial displacement of the auxiliary spring 42 is limited to prevent the deflection of the roller assembly 2, thereby improving the stability of the spring hanger.

[0017] The load assembly 5 is provided with a main spring upper limit ring 51, a main spring 52, a load tube 53, and a main spring lower limit ring 54. When the hanger is working, the main spring 52 generates axial displacement. By providing the main spring upper limit ring 51 and the main spring lower limit ring 54, the radial displacement of the main spring 52 is limited, and the friction between the main spring 52 and the load tube 53 during the expansion and contraction process is prevented, thereby improving the stability of the spring hanger.

[0018] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents of the present invention should be included in the protection scope recorded in the claims.

Claims

1. A low friction, high precision constant force spring hanger, comprising a fixed frame, characterized in that A roller assembly, a cam assembly, an auxiliary spring assembly, a load assembly, and an adjustment bolt assembly are arranged in the fixed frame; the auxiliary spring assembly is provided with an auxiliary spring outer limiting ring, an auxiliary spring, and an auxiliary spring pressure plate; the load assembly is provided with a main spring upper limiting ring, a main spring, a load tube, and a main spring lower limiting ring; the auxiliary spring assembly (4) is provided with an auxiliary spring outer limiting ring (41), an auxiliary spring (42), and an auxiliary spring pressure plate (43); and the load assembly (5) is provided with a main spring upper limiting ring (51), a main spring (52), a load tube (53), and a main spring lower limiting ring (54).

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