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Shock Absorber for Vibration

A technology of buffer device and vibration device, which is applied in the direction of shock absorber, percussion drilling, vibration drilling, etc., can solve the problems of cost and miniaturization obstacles, and achieve the effect of suppressing the generation of vibration and noise

Inactive Publication Date: 2014-10-29
TOA TONE BORING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] This method is not particularly problematic in large devices, but it is an obstacle in terms of cost and miniaturization to install an air compressor in a small device, and an air cushion device that can change the spring coefficient without an air compressor is expected

Method used

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  • Shock Absorber for Vibration
  • Shock Absorber for Vibration
  • Shock Absorber for Vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In the soil pollution investigation machine, it is not preferable to disturb the collected sample with water, and therefore, unlike ordinary drilling, drilling is performed without water. In the case of drilling without water, it is impossible to use water to discharge the drilling sand to the ground. Therefore, the removal of the drilling sand is not sufficient, so it is necessary to compact and press the drilling sand into the formation around the drill hole. The drill bit is always pressed in Drilling in the state of the drilling surface. Therefore, the direction of vibration to be damped is only one direction, and it is only necessary to make the damping effect effective with respect to the drilling direction.

[0048] like figure 1 As shown, the vibrating device 1 rotates two eccentric weights 11 housed in the casing 10 in opposite directions, cancels out vibrations in the horizontal direction, and extracts only vibrations in the vertical direction.

[0049] A m...

Embodiment 2

[0062] Example 1 In polluted soil surveys, etc., in order to collect high-quality soil samples, drilling and sampling were not carried out at the water supply ground for discharging soil from boreholes, and the drilling soil was pressed into the surrounding ground by compaction, without Since the soil is discharged to the ground, the drill bit is pressed against the drill surface to perform drilling, and the direction of the damped vibration is only one direction.

[0063] On the other hand, when it is used in general drilling fields such as construction of water wells and ground work, it is possible to perform water feeding for soil discharge. Therefore, it may be required to carry out drilling while pulling the drill rod upward by the drill head bearing a part of the weight of the drill rod or the like.

[0064] In Embodiment 2, even when the drilling head is used to lift the weight of the drill rod by a certain amount, the air buffer device can buffer the vibration generate...

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Abstract

[PROBLEMS] To fill an air cylinder with air without installing an air compressor in an air buffer device. [MEANS FOR SOLVING PROBLEMS] The buffer device (2) consisting of a piston (21) and the air cylinder (22) is incorporated in an excitation device (1), and it constitutes a drill head with a speed reducer (4). When the drill head is raised, the air cylinder (22) rises with respect to the piston (21), and atmosphere is sucked to an air damper room (23) through a check valve (25). When the drill head is lowered and a drill bit is brought into contact with a drill face, the piston (21) cannot descend and the air cylinder (22) relatively descends with respect to the piston. Since the check valve (25) does not let air in the air cylinder (22) escape to an atmosphere-side, air in the air damper room (23) is compressed, and drop of the drill head stops when pressure in the air damper room (23) and weight of the drill head are balanced. Thus, the buffer device having an appropriate spring coefficient can be obtained.

Description

technical field [0001] The present invention relates to an air type shock absorber for preventing the vibration of a vibrating machine from being transmitted to a main body in a drilling machine utilizing vibration generated by a vibrating machine or a pile driving device utilizing vibration. Background technique [0002] A vibrating and rotating drill is used to transmit vibration to the rotating drill shaft. However, transmission of the vibration to a prime mover such as a hydraulic motor that drives the drill shaft or a reducer can also cause failure, so it is not ideal. A buffer device that prevents the transmission of vibration is required. As a shock absorber, a rubber damper having a good shock absorbing effect with a simple structure is often used. Furthermore, as described in Patent Document 1 (JP-A-8-232570), there is an air cushioning device (air damper) using an air cylinder instead of rubber in a hammer drill. [0003] Patent Document 1: Japanese Patent Applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B1/12E02D7/18F16F15/04
CPCE21B7/24F16F9/43F16F9/0218
Inventor 桥元杰大野真幸山下诚
Owner TOA TONE BORING