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Threaded joints with bolts and nuts

A technology of bolts and nuts, applied in the field of screw connectors, can solve problems such as not being suitable for ensuring that nuts are loose, and achieve the effect of reliable bolt connection, high self-locking dynamic measurement, convenient and bolt connection

Inactive Publication Date: 2014-10-15
NEWFREY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high degree of plasticity of such nuts and the cold flow properties of plastics, this known design is not suitable for securing nuts made of plastics against loosening

Method used

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  • Threaded joints with bolts and nuts
  • Threaded joints with bolts and nuts
  • Threaded joints with bolts and nuts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] figure 1The shown nut 1 is a one-piece formed part made of plastic. The nut has a body 2 with an outer contour in the shape of a hexagonal prism forming a tool engagement area 3 . At one end of the body 2, a disc-shaped flange is formed for supporting the nut 1 on the part to be fixed. The other end of the body 2 is provided with an inclined surface 5 to facilitate coupling of tools.

[0025] Such as figure 2 As shown, the nut 1 is pierced by a hole 6 coaxial with the tool engagement area 3 and having three distinct segments. The first section 7 extends through the largest part of the body 2 and is provided with an internal thread 8 formed by a thread groove 9 embedded in the wall of the hole 6 and extending along a helix. The internal thread 8 of the nut 1 has an outer diameter Da equal to the diameter of an imaginary cylinder coaxial with the internal thread, the surface of which is in line contact with the thread base of the thread groove 9 . The core diameter ...

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PUM

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Abstract

In a screw connection, the bolt is provided with an external thread consisting of threads of the trapezoidal thread type, with straight side surfaces converging radially towards each other and a radially outer interface between the side surfaces. The nut has a hole provided over at least a part of its length, the hole having an internal thread formed by a thread groove having side segments in the form of a trapezoidal thread that is straight in profile and converges radially toward each other, the side segments extending in a continuous manner The radially outward transition into the circular section of the thread base forming the thread groove. The outer diameter of the external thread of the bolt is larger than the diameter of the imaginary cylinder. The surface of the imaginary cylinder separates the side section of the internal thread of the nut before being screwed onto the bolt from the circular section of the thread base that forms the thread groove, and the nut is screwed When on a bolt, the bolt's external threads displace material in the area of ​​the thread base of the nut's internal threads.

Description

technical field [0001] The invention relates to a screw connection with a bolt and a nut, the nut can be screwed on the bolt, the external thread of the bolt and the internal thread of the nut have the same inclination and the same thread profile angle, and is used for the nut The material (at least in the area of ​​the internal thread) is softer than the material used for the bolt (at least in the area of ​​the external thread). The invention also relates to a nut made of plastic for such a screw connection. Background technique [0002] A screw connection of the above-mentioned type is known from DE 198 57 225 A1. This screw connection is used to fix the accelerator pedal to the body of the motor vehicle and is used in the automatic bolting process. In this screw connection, the bolt has a metric unified standard thread with a thread angle of 60 degrees, and the internal thread of the nut has a smaller outer diameter than the external thread of the bolt before being scre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B33/02F16B37/00F16B35/00
CPCF16B37/005
Inventor 弗兰克·罗斯曼克里斯琴·克姆夫约翰·莱茵德尔
Owner NEWFREY