CN201412153Y - Rock drill support with buffer spring - Google Patents

Abstract

The utility model relates to a rock drill, in particular to a rock drill support with a buffer spring for protecting chains from damaging. The rock drill comprises a rock drill support, wherein the rock drill support is connected with a rock drill thruster, the inside of the rock drill support is provided with a spring buffer device which comprises a front linkage device, the buffer spring and a rear linkage device, the front linkage device is connected with a front support of the rock drill support, the rear linkage device is connected with a rear support of the rock drill support, and the buffer spring is arranged between the front linkage device and the rear linkage device. The rock drill support has the advantages that first, firstly, when a thrust motor is started, the start impact ofchains is released for leading the rock drill to stably start, secondly, when a thrust beam is overloaded to move, thrust chains can be protected from overloading, thirdly, the rock drill support reduces the high-frequency vibration and noises produced when the rock drill works.

Description

The drill bar of buffer spring is housed

Technical field

The utility model relates to a kind of hammer drill, particularly a kind of drill bar that buffer spring is housed that is used to protect the chain damage.

Background technology

Buffer had mechanically obtained using widely in mine engineering in recent years, wherein in high efficiency all-hydraulic driving drill carriage, be converted to present " soft-hard " link from original " firmly " link, reduce the vibration of car load, improve the drill carriage total quality, and obtained good effect.Under the background that the design of vitals overload protection is approved by increasing design engineer, buffer caused the attention of the relevant companies in various countries, and organizational strength is developed competitively in the superiority in this field.

The chain type propeller is a kind of traditional propeller, uses more on some long stroke propellers.Chain drive is a rigidity, and its vitals chain under adverse circumstances such as vibration and silt, is easy to damage.So developing a kind of buffer that is used to protect chain to damage is very important.

Summary of the invention

The purpose of this utility model is exactly the weak point in the background technology; provide a kind of when alleviating in the chain type forward beam hydraulic motor and starting to the temporary impact of chain with when drill bar blocks, chain is played the drill bar that buffer spring is housed of protective effect.

For achieving the above object, the utility model is equipped with the drill bar of buffer spring, comprise drill bar, drill bar is connected with drill feed, be provided with spring bumper in the drill bar, spring bumper comprises preceding linked set, buffer spring and back linked set, and preceding linked set is connected with the fore-stock of drill bar, back linked set is connected with the after-poppet of drill bar, is provided with buffer spring between preceding linked set and the back linked set.

For of the present utility model a kind of preferred, preceding linked set rear end and back linked set front end are connected with spring base I and spring base II respectively, buffer spring is set on spring base I and the spring base II, and the buffer spring two ends are connected with spring base II with spring base I respectively.

For of the present utility model a kind of preferred, be respectively equipped with through hole on the fore-stock of described drill bar and the after-poppet, preceding linked set is connected with through hole on the after-poppet with fore-stock respectively with the back linked set.

For of the present utility model a kind of preferred, spring base I is connected with the back linked set with preceding linked set rear end by the overload protection pin respectively with spring base II.

For of the present utility model a kind of preferred, preceding linked set front end is connected with chain respectively with linked set rear end, back.

The utility model is compared with background technology, and having one is propulsion motor when starting, and has alleviated the startup impact force of chain, and hammer drill is started steadily; The 2nd, during the motion of forward beam overload, play overload protection to advancing chain; The 3rd, dither when reducing hammer drill work and the noise that is produced thereof.

The utility model is elaborated with reference to accompanying drawing below in conjunction with embodiment.

Description of drawings

Fig. 1 is the structural representation that the drill bar of buffer spring is housed.

The specific embodiment

Embodiment 1: with reference to Fig. 1.The drill bar of buffer spring is housed, comprise drill bar, drill bar is connected with drill feed, be provided with spring bumper in the drill bar, spring bumper comprises preceding linked set 1, buffer spring 6 and back linked set 9, preceding linked set 1 is connected with the fore-stock 2 of drill bar, and back linked set 9 is connected with the after-poppet 8 of drill bar, is provided with buffer spring 6 between preceding linked set 1 and the back linked set 9.Preceding linked set 1 rear end and back linked set 9 front ends are connected with spring base I 5 and spring base II 7 respectively, and buffer spring 6 is set on spring base I 5 and the spring base II 7, and buffer spring 6 two ends are connected with spring base II 7 with spring base I 5 respectively.Be respectively equipped with through hole 3 on the fore-stock 2 of described drill bar and the after-poppet 8, preceding linked set 1 is connected with through hole 3 on the after-poppet 8 with fore-stock 2 respectively with back linked set 9.Spring base I 5 is connected with back linked set 9 with preceding linked set 1 rear end by overload protection pin 4 respectively with spring base II 7.Preceding linked set 1 front end is connected with chain respectively with linked set rear end, back 9.

Embodiment 2: with reference to Fig. 1.During motor starting, preceding linked set 1 is received the tensile force f 1 of front end chain and the reaction force F1 ' of buffer spring 6.At this moment, buffer spring 6 is subjected to the tensile force f 2 of rearmounted chain, the frictional force f1 of drill bar and the inertia force f2 of hammer drill, and these force directions are opposite.Spring begins elongation under the effect of bidirectional force.Suppose that elongation is x, the elastic coefficient K then has F1＞F1 '=Kx, and the spring elongation absorbs impact stress.When F1=F1 '=F2+f1+f2, drill bar begins action.When drill bar was blocked by thing, chain can be subjected to the overload tensile force f g of propulsion motor, and this overload power is also with the equally slow increase of above-mentioned principle.Suppose that it is Fx that chain is broken required power, the diameter of overload protection pin is d, and shear stress allowable is [τ], then: $\frac{\mathrm{\π}{d}^2}{4}\left[\mathrm{\τ}\right]\≤\mathrm{Fx}.$

What need understand is: though the foregoing description is to the utility model detailed explanation of contrasting; but these explanations; just to simple declaration of the present utility model; rather than to restriction of the present utility model; any utility model that does not exceed in the utility model connotation is created, and all falls in the protection domain of the present utility model.

Claims (5)

1, a kind of drill bar that buffer spring is housed, comprise drill bar, drill bar is connected with drill feed, it is characterized in that: be provided with spring bumper in the drill bar, spring bumper comprises preceding linked set (1), buffer spring (6) and back linked set (9), preceding linked set (1) is connected with the fore-stock (2) of drill bar, back linked set (9) is connected with the after-poppet (8) of drill bar, is provided with buffer spring (6) between preceding linked set (1) and the back linked set (9).

2, the drill bar that buffer spring is housed according to claim 1, it is characterized in that: preceding linked set (1) rear end and back linked set (9) front end are connected with spring base I (5) and spring base II (7) respectively, buffer spring (6) is set on spring base I (5) and the spring base II (7), and buffer spring (6) two ends are connected with spring base II (7) with spring base I (5) respectively.

3, the drill bar that buffer spring is housed according to claim 1, it is characterized in that: be respectively equipped with through hole (3) on fore-stock of described drill bar (2) and the after-poppet (8), preceding linked set (1) is gone up through hole (3) with fore-stock (2) and after-poppet (8) respectively with back linked set (9) and is connected.

4, the drill bar that buffer spring is housed according to claim 2 is characterized in that: spring base I (5) is connected with back linked set (9) with preceding linked set (1) rear end by overload protection pin (4) respectively with spring base II (7).

5, the drill bar that buffer spring is housed according to claim 1 is characterized in that: preceding linked set (1) front end is connected with chain respectively with linked set rear end, back (9).

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