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A bolt elongation detection device

A detection device and elongation technology, used in measuring devices, instruments, etc., can solve the problems of high quality requirements on both ends of the bolt, inability to detect, inaccurate detection results, etc., to achieve flexible self-adaptive action and bolt elongation. Precise, wide-ranging effects

Active Publication Date: 2020-05-08
JIANGSU XCMG CONSTR MASCH RES INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both outer diameter dial gauge / caliper testing and ultrasonic testing have high requirements on the quality of both ends of the bolt, and even require pre-processing, which increases testing costs and inaccurate testing results
The patent "A Measuring Device and Method for the Elongation of Connecting Rod Bolts" is only suitable for the detection of the elongation of bolts with central holes on both ends, and has poor versatility; after most bolts are assembled, the space at both ends is limited, and several bolts are arranged along the axial direction of the bolts. The display dial indicator will not be able to detect; the detection device is only suitable for the detection of bolts of one length and size, and the applicability is poor

Method used

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  • A bolt elongation detection device
  • A bolt elongation detection device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, it is a bolt elongation detection device, the bolt 4 to be detected is the detected part, and the bolt 4 to be detected includes a nut 41 and a screw rod 42;

[0025] It includes a handle 1, a retractable positioning block 2, an adjustment shaft 3, a bolt to be detected 4, a fastening screw 5, a host 6, a displacement sensor 7, a connecting sleeve 8, a guide rod 9, a positioning guide rod 10, and an adjustment screw 11.

[0026] A retractable positioning block 2 is arranged on one side of the handle 1, and a positioning guide rod 10 is arranged on the corresponding other side;

[0027] The telescopic positioning block 2 includes a connected moving bar 21 and a positioning part 22; the positioning part 22 is positioned at the inner side of the handle 1, and the free end face of the positioning part 22 is a precision plane for positioning the nut 41 of the bolt 4 to be detected, and the positioning part 22. The positioning end face is provided ...

Embodiment 2

[0034] A bolt elongation detection system, including the above-mentioned bolt elongation detection device, and also includes a host 6;

[0035] The handle 1 is used to support the entire detection system; one end of the handle 1 is provided with a round hole for the telescopic positioning block 2 to slide precisely along the axial direction, a fixing hole for the adjustment shaft 3, and a hole for the fastening screw 5. Threaded hole; the other end of the handle 1 is provided with the fixing hole of the displacement sensor 7, the guide hole of the positioning guide rod 10, and the matching internal thread of the adjusting screw 11.

[0036] The telescopic positioning block 2 includes two sections of shaft shoulders, one section of shaft shoulder 21 fits with a round hole at one end of the handle 1, and can slide along the axial direction, and a precision rack is also arranged on this section of shaft shoulder, which is compatible with the adjustment The gear on the shaft 3 coo...

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PUM

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Abstract

The invention discloses a bolt elongation detection device. The bolt elongation detection device comprises a handle, a telescopic positioning block, a displacement sensor, a guide rod and a positioning guide rod, wherein the telescopic positioning block is arranged on one side of the handle, and the positioning guide rod is arranged on the other side of the handle; the telescopic positioning blockcomprises a movable rod and a positioning part which are connected with each other; the positioning part is located on the inner side of the handle, and the end surface of the free end of the positioning part is a precise plane and is used for positioning one end of a to-be-detected bolt; one end of the movable rod is connected with the positioning part, is arranged in a round hole of the handleat the other end in a penetrating mode, and can axially move along the length direction of the to-be-detected bolt; the positioning guide rod is arranged in a guide hole of the handle, is close to theprecision end surface of the telescopic positioning block and is used for positioning the other end of the to-be-detected bolt; and an outer conical surface is arranged at the middle end of the positioning guide rod, is matched with the conical surface of the guide rod, and is used for converting the axial displacement of the positioning guide rod into the axial displacement of the guide rod; andthe displacement sensor is arranged corresponding to the guide rod and is used for sensing the axial displacement of the guide rod.

Description

technical field [0001] The invention belongs to the technical field of detection equipment, and in particular relates to a bolt elongation detection device. Background technique [0002] Bolt connection is the main assembly scheme of construction machinery. Due to the complex construction environment and harsh working conditions of construction machinery, during the production process and after-sales service of construction machinery, the requirements for bolt pre-tightening force are relatively high. When bolts are tightened, the bolt elongation is required to meet the design requirements to ensure that Reliable and stable bolt connection during long-term operation. Therefore, in the production process and after-sales service of construction machinery, it has become a technical problem to quickly and accurately obtain the bolt elongation and judge the bolt connection quality accurately and intuitively. Unfortunately, at present, there is no suitable and effective detectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/02
CPCG01B21/02
Inventor 王灿陈新春韩帅帅
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD