CN1280555C

CN1280555C - Shock absorber

Info

Publication number: CN1280555C
Application number: CNB2004100013811A
Authority: CN
Inventors: 龙锡弼
Original assignee: Individual
Current assignee: Koba Co ltd
Priority date: 2003-01-09
Filing date: 2004-01-07
Publication date: 2006-10-18
Anticipated expiration: 2024-01-07
Also published as: CN1517573A; KR20040064028A; KR100502470B1

Abstract

A shock absorber is provided to enable various uses according to the purposes by selectively adjusting the absorbing degree of impact according to the impact given. A shock absorber comprises a body(10) having an eccentric part(12) to the pierced middle inner wall; a rod cover(60) having an annular space and an incision part(62); an accumulator(70) installed in the annular space of the rod cover; a built-in tube(20) coming in contact with the inner surface of the body; an operation part(50) comprising a piston rod(51) inserted in the rod cover, a piston moving in the built-in tube, a spring guide(54) fixed to the piston rod of the rear of the piston, and a compression spring(52) giving elastic force to the spring guide; and a dial cap(40) rotatably combined to the end of the body while receiving the end of the built-in tube, and fixed to the built-in tube by a fixing bolt(42). The rod cover is installed to the inner front of the body. An oil conduit(22) is formed between the outer surface of the built-in tube and the eccentric part of the body. Plural oil inflow and outflow holes(26) are formed to the outer wall of the built-in tube, to communicate with the oil conduit. A through hole(28) is formed to the outer wall of the front end of the built-in tube. A deflection fixing bolt(44) is fastened to a side of the dial cap, to be selectively fixed to the end of the body.

Description

Vibration damper

Technical field

The present invention relates to a kind of vibration damper that is used for various industrial fields, relate in particular to a kind of like this vibration damper, that is, its buffer capacity is with being applied to impact strength on it and optionally controlled, thereby is used for its desirable application.

Background technique

Usually, vibration damper is used to suppress to be applied to the shock and vibration on it.This class vibration damper also is known as oil damper, is installed in the impact that suppresses to be applied on automobile and the production line on it.Conventional vibration damper is configured to hold high viscosity liquid such as oil, so that suppress to be applied to the shock and vibration on its piston.At this moment, piston is withdrawn backward, absorbs shock and vibration simultaneously.After this, piston is returned to its normal position to carry out the preparation of reception shock and vibration subsequently.

In fact, Chang Gui vibration damper is optionally to use corresponding to the position of its application and occasion.Therefore, when mechanical device changed in its structure to some extent, the vibration damper that is associated with the change parts was just necessary with new replacing.Therefore, the defective of conventional vibration damper existence is that even if the vibration damper that is replaced still can be brought into play its function, but vibration damper must leave in the additional memory device or abandon.

That is to say that any machinery that a plurality of vibration dampers are housed in production line breaks down and when causing machinery to be replaced, the vibration damper that is associated with machinery all must be reinstated new more changing with machinery one.Therefore, when the machinery in the production line suffered damage or destroys, vibration damper that is associated and machinery all must be changed, thereby cause double economic loss.

In addition, produce high-quality product although be suitable for transmitting the impact force that the transfer equipment of accurate device such as semiconductor product has to farthest reduce to be applied on the product in transport process, but existing vibration damper can not absorb the impact that is applied on the semiconductor product effectively, does not also just allow and produces the high quality of products that does not have defective.

That is to say, be applied on the semiconductor production equipment,, need provide a kind of and can regulate the vibration damper of its buffer capacity with the impact that is applied on it according to its application owing to have the various impacts of varying strength.Therefore, do not control the place of the parts of pressing in the vibration damper at vibration damper, vibration damper just can not be adapted to the various operating modes that the equipment of vibration damper is housed effectively.

For this reason, press for a kind of vibration damper that can control its buffer capacity with its application of improvement.

Summary of the invention

Therefore, the present invention is intended to solve the aforementioned problems in the prior, and one object of the present invention is to provide a kind of vibration damper, and its buffer capacity can be optionally controlled with the impact strength that is applied on it, thereby be used for its desirable application.

To achieve these goals, the invention provides a kind of vibration damper, it comprises: a cylindrical body is formed with an eccentric section with predetermined length on its internal surface; A bar cover that is positioned at this cylindrical body front side is provided with a circular groove around it, and is provided with notch portion in the rear end of this bar cover; An accumulator, it is installed in this bar and puts, to be assemblied in this circular groove; Pipe in one, it is inserted in this cylindrical body tightly, so just, in this, form an oil circuit between the outer surface of pipe and the cylindrical eccentric section, should open wide by interior Guan Zaiqi front end, and be formed with a plurality of oilholes in a zone corresponding with eccentric section, adjacent antetheca place of its front end of Guan Zaiyu comprises a through hole in this; An exciting unit, it has one and is inserted in piston rod in this bar cover, one and is contained on this piston rod and is fixed on spring guide on the rear end of the piston rod adjacent with this piston and one with piston mobile in interior pipe, one and is inserted on this spring guide pressure spring with this spring guide of bias voltage; And dial lid, it is rotatably installed on this cylindrical rear end admitting the rear end of pipe in this, and it is fastened in this on pipe by a lock bolt, and optionally by a single angle locking bolton on this cylindrical rear end; Wherein, piston rod has the first bar portion, the second bar portion and the 3rd bar portion backward successively in the past, the diameter maximum of the first bar portion wherein, and the diameter minimum of the 3rd bar portion, and in the middle of the diameter of the second bar portion occupy; Wherein allow the internal diameter of center hole of the piston that piston rod passes through greater than the external diameter of the second bar portion of piston rod, thereby reserve certain clearance betwixt, and the length of piston is less than the length of the second bar portion of piston rod, thereby piston can move in the second bar portion; Wherein the anterior end surface of piston can cooperate with step between the second bar portion with the first bar portion, thereby blocking-up is communicated with fluid between the described gap at the ante-chamber before the piston; Wherein, spring guide is connected with the 3rd bar portion of piston rod, and spring guide is provided with oil groove in its anterior end surface, and the back cavity that described oil groove is used for being positioned at the spring guide rear side is communicated with described interstitial fluid.

Description of drawings

Above and other objects of the present invention, feature and advantage will be below more clearly obtain understanding in conjunction with the accompanying drawings the detailed description, wherein:

Fig. 1 is a cylindrical cross-sectional figure, and this cylindrical body is parts of vibration damper in the one embodiment of the invention;

Fig. 2 a is the left side view of a bar cover, and this bar cover is parts of vibration damper of the present invention;

Fig. 2 b is the longitudinal section of Fig. 2 a bar cover;

Fig. 3 a is the right side view of an interior pipe, and pipe is parts of vibration damper of the present invention in this;

Fig. 3 b is the longitudinal section of pipe in Fig. 3 a;

Fig. 4 is the front view of a piston rod, and this piston rod is parts of vibration damper of the present invention;

Fig. 5 a is the left side view of a spring guide, and this spring guide is parts of vibration damper of the present invention;

Fig. 5 b is the cross-sectional figure along Fig. 5 a center line B-B;

Fig. 6 a is the longitudinal section of vibration damper of the present invention, and wherein piston impacts and withdrawal backward by applying one;

Fig. 6 b is the longitudinal section of vibration damper of the present invention, and wherein piston is returned to its normal position by the release of this impact;

Fig. 7 is the cross-sectional figure along Fig. 6 a center line A-A, and wherein the oilhole and the relative position between the oil circuit of interior pipe are big;

Fig. 8 is the view similar to Fig. 7, and wherein the oilhole and the relative position between the oil circuit of interior pipe are little.

Embodiment

To make a more detailed description the present invention with reference to accompanying drawing by example below.

In the accompanying drawings, Fig. 1 is the cylindrical cross-sectional figure of vibration damper in the one embodiment of the invention, Fig. 2 a is the left side view of absorber rod cover of the present invention, Fig. 2 b is the longitudinal section of Fig. 2 a bar cover, Fig. 3 a is the right side view of pipe in the vibration damper of the present invention, Fig. 3 b is the longitudinal section of pipe in Fig. 3 a, Fig. 4 is the front view of piston lever of reducer of the present invention, Fig. 5 a is the left side view of absorber spring guide pin bushing of the present invention, Fig. 5 b is the cross-sectional figure along Fig. 5 a center line B-B, Fig. 6 a is the longitudinal section of vibration damper of the present invention, wherein piston impacts and withdrawal backward by applying one, Fig. 6 b is the longitudinal section of vibration damper of the present invention, wherein piston is returned to its normal position by the release of this impact, and Fig. 7 is the cross-sectional figure along Fig. 6 a center line A-A, and wherein the oilhole and the relative position between the oil circuit of interior pipe are big, Fig. 8 is the view similar to Fig. 7, and wherein the oilhole and the relative position between the oil circuit of interior pipe are little.

The vibration damper of one embodiment of the invention comprises a cylindrical body 10, is formed with an eccentric section 12 with predetermined length on its internal surface, as shown in Figure 1.Bar cover 60 is positioned at the front side of cylindrical body 10, and this bar cover 60 is provided with circular groove 61 around, and is provided with notch portion 62 in its back-end, as shown in Figure 1.An accumulator 70 is installed on the bar cover 60, thereby is assemblied in the circular groove 61.Vibration damper of the present invention also comprises in one manages 20, and it is inserted in the cylindrical body 10 tightly, so just forms oil circuit 22 between the eccentric section 12 of the outer surface of interior pipe 20 and cylindrical body 10.In pipe 20 opening wide at its front end, and be formed with a plurality of oilholes 26 in a zone corresponding to eccentric section 12.Interior pipe 20 also is provided with a through hole 28 at the antetheca place adjacent with its front end.Vibration damper of the present invention also comprises an exciting unit 50, and it has the piston rod 51 that is inserted in the bar cover 60, be assemblied on the piston rod 51 with piston 56 mobile interior pipe 20 in, be fixed on spring guide 54 on the rear end of the piston rod 51 adjacent with piston 56 and one is inserted on the spring guide 54 pressure spring 52 with biasing spring guide pin bushing 54.Vibration damper also comprises dial lid 40, and it is rotatably installed on the rear end of cylindrical body 10 rear end with pipe 20 in admitting.Dial lid 40 is managed on 20 in being fastened on by a lock bolt 42, and optionally is fastened on the rear end of cylindrical body 10 by a single angle lock bolt 44.

As shown in Figure 1, cylindrical body 10 is axially bored a hole, and the surface is provided with eccentric section 12 within it.The retaining groove 14 that has predetermined depth separately is respectively formed at the internal surface of cylindrical body 10 opposite ends.

Shown in Fig. 2 a and 2b, bar cover 60 is inserted in the cylindrical body 10.Bar cover 60 comprises formation circular groove 61 in its vicinity, and is axially bored a hole.Bar cover 60 is provided with flange in its back-end.Notch portion 62 is formed on the both sides that bar overlaps the outer surface of 60 flanges.

Accumulator 70 is positioned in the circular groove of bar cover 60.Accumulator 70 is made by the material of a kind of energy free shrink and expansion, as sponge, but seldom absorbs liquid.

Shown in Fig. 3 a and 3b, the rear end of bar cover 60 is connected with interior pipe 20, thus closely contact with it.Interior pipe 20 is assembled in the cylindrical body 10 slidably.Be formed with oil circuit 22 between the outer surface of interior pipe 20 and the eccentric section 12 of cylindrical body 10.In pipe 20 opening wide at its front end, and be formed with an oil hole 24 in its back-end, in oil is injected into by this oil hole 24 in the pipe 20.Interior pipe 20 comprises a plurality of oilholes 26 that are formed on its wall place, and a plurality of like this oilholes 26 just communicate with oil circuit 22.Interior pipe 20 also comprises the through hole 28 close with its front end.Through hole 28 can align with a plurality of oilholes 26, and can take any number setting.

Interior pipe 20 remains in the cylindrical body 10 by back clasp 30 with being stabilized, and this back clasp 30 is installed in the retaining groove 14 that is formed at cylindrical body 10 rear ends.Therefore, because interior pipe 20 is maintained fixed by clasp 30, be difficult to interior pipe 20 is taken out from the outside of cylindrical body 10.

Exciting unit 50 is inserted in the interior pipe 20 by bar cover 60 from the front portion of cylindrical body 10.Exciting unit 50 comprises piston rod 51, piston 56, spring guide 54 and pressure spring 52.

As shown in Figure 4, piston rod 51 comprises three bar portions, and they are variant mutually on diameter, the diameter maximum of first 51a of bar portion wherein, and the diameter minimum of the 3rd 51c of bar portion, and in the middle of the diameter of second 51b of bar portion occupy.First 51a of bar portion is inserted into the cylindrical body 10 from cylindrical front portion, and such first 51a of bar portion just is put in the center hole of bar cover 60.Buffer head 58 is connected with the front end of first 51a of bar portion.

Dust cover 16 is put in the front end of cylindrical body 10, penetrates the inside of cylindrical body 10 when dirt such as dust just can not be inserted in the cylindrical body 10 at first 51a of bar portion of piston rod 51 like this.Dust cover 16 is maintained fixed by preceding clasp 30, and this preceding clasp 30 is assembled in the preceding retaining groove 14 of cylindrical body 10.

Piston 56 is configured as cylindrical shape.Allow the internal diameter of center hole of the piston 56 that piston rod 51 passes through greater than the external diameter of second 51b of bar portion of piston rod 51, thereby reserve certain clearance 57 betwixt.The length of piston 50 is less than the length of second 51b of bar portion of piston rod 51, thereby allows that piston 56 can move on second 51b of bar portion of piston rod 51.

Shown in Fig. 5 a and 5b, spring guide 54 is connected with the 3rd 51c of bar portion of piston rod 51.Spring guide 54 is provided with a pair of oil groove 55 at its front-end face, and radially extend at its center from end face.Spring guide 54 is provided with a flange at its front end.

Shown in Fig. 6 a and 6b, manage in 20 in pressure spring 52 is inserted in, and supported by the interior edge face of interior pipe 20 at the one end.Pressure spring 52 is enclosed on the spring guide 54, and by the flange bearing of spring guide 54.

Dial lid 40 is by the back undergauge end of pipe 20 in rotatably being contained in, simultaneously with the back end in contact of cylindrical body 10.The rear end of pipe 20 also was fastened on the cylindrical body 10 by single angle lock bolt 44 in dial lid 40 was fastened to by lock bolt 42.After dial lid 40 rotated to an angle, single angle lock bolt 44 was axially screwed in cylindrical body 40 by dial lid 40, thereby dial lid 40 is maintained on the position of rotation.As lock bolt 42 and single angle lock bolt 44, can adopt stud bolt, can not cover 40 outstanding like this from dial.

Shown in Fig. 7 and 8, can adopt the buffer capacity of controlling vibration damper in such a way, that is, and dial lid 40 so that with the dial lid 40 interior pipes 20 that link to each other by user's rotation to manage 20 oilhole 26 and the relative position between the oil circuit 22 in changing.

The operation of vibration damper in the one embodiment of the invention will be described now.

When applying an impact for buffer head 58, the piston 56 that links to each other with buffer head 58 is withdrawn in the cylindrical body 10.When piston 56 was withdrawn backward, the through hole 28 of interior pipe 20 opened wide, thereby allows oil by through hole 28.Spring guide 54 moves in interior pipe 20 backward, compresses pressure spring 52 simultaneously.

The operation that is applied to the impact on the buffer head 58 according to the effective inhibition of the intensity of impacting is performed such, promptly, at single angle lock bolt 44 after dial lid 40 unscrews, dial lid 40 intensity corresponding to impact rotate to an angle, and then are fastened on the cylindrical body 10 by screwing single angle lock bolt 44.

When 40 rotations of dial lid, the interior pipe 20 that is fastened on the dial lid 40 by lock bolt 42 also rotates, thereby has changed the gap between the eccentric section of the surface of the interior pipe 20 that is formed with oilhole 26 and cylindrical body 10.

More particularly, when the gap between the eccentric section of the described surface of interior pipe 20 and cylindrical body 10 dwindled, the oil of less amount was by this gap that dwindles discharging.In this case, because vibration damper can absorb and cover 40 non-rotary situations with dial and compare higher impact, so vibration damper is suitable for absorbing higher impact.

Meanwhile, when dial lid 40 rotations during with the gap between the eccentric section of the surface of pipe 20 increase in and cylindrical body 10, more substantial oil discharges by the gap of expansion.In this case, because vibration damper can absorb and cover 40 non-rotary situations with dial and compare lower impact, so vibration damper is suitable for absorbing lower impact.

After managing in 20 in piston 56 is fully retracted to, piston 56 is returned to the normal position by means of pressure spring 52.This moment, spring guide 54 closely contacts with piston 56, and piston 56 just is separated with the ledge surface of first 51a of bar portion of piston rod 51 like this.Therefore, be contained in oil in the back cavity that limits by interior pipe 20 and piston 56 and just flow to ante-chamber before being arranged in piston 56 through oilhole 26, oil circuit 22, through hole 28 and oil groove 55 and gap 57.

As mentioned above, the invention provides a kind of vibration damper, it is suitable for optionally controlling its buffer capacity with the intensity that is applied to the impact on its buffer head, thereby can be used for desirable application, thereby provides Economy and valuable service to the user.

Although described a preferred embodiment of the present invention for exemplary purpose, but for a person skilled in the art, will be understood that, can do multiple improvement, replenish and replace and do not break away from the scope and spirit of the present invention that are disclosed in the claim of enclosing.

Claims

1, a kind of vibration damper, it comprises:

A cylindrical body (10) is formed with an eccentric section (12) with predetermined length on its internal surface;

A bar cover (60) that is positioned at this cylindrical body (10) front side is provided with a circular groove (61) around it, and is provided with notch portion (62) in the rear end of this bar cover;

An accumulator (70), it is installed on this bar cover (60), to be assemblied in this circular groove (61);

Pipe (20) in one, it is inserted in this cylindrical body (10) tightly, so just, in this, form an oil circuit (22) between the eccentric section (12) of the outer surface of pipe (20) and cylindrical body (10), should open wide by interior Guan Zaiqi front end, and be formed with a plurality of oilholes (26) in a zone corresponding with eccentric section (12), pipe (20) comprises a through hole (28) at the antetheca place adjacent with its front end in this;

An exciting unit (50), it has one and is inserted in piston rod (51) in this bar cover (60), one and is contained in this piston rod (51) and goes up and be fixed on spring guide (54) on the rear end of the piston rod (51) adjacent with this piston (56) and one with piston mobile (56) in interior pipe (20), one and be inserted in the last pressure spring (52) with this spring guide of bias voltage (54) of this spring guide (54); With

A dial lid (40), its be rotatably installed on the rear end of this cylindrical body (10) with admit should in rear end of pipe (20), and it is fastened in this by a lock bolt (42) and manages on (20), and optionally is fastened on the rear end of this cylindrical body (10) by a single angle lock bolt (44);

Wherein, piston rod (51) has the first bar portion (51a), the second bar portion (51b) and the 3rd bar portion (51c) in the past backward successively, the diameter maximum of the first bar portion (51a) wherein, the diameter minimum of the 3rd bar portion (51c), and in the middle of the diameter of the second bar portion (51b) occupy;

Wherein allow the internal diameter of center hole of the piston (56) that piston rod (51) passes through greater than the external diameter of the second bar portion (51b) of piston rod (51), thereby reserve certain clearance (57) betwixt, and the length of piston (56) is mobile thereby piston (56) can be gone up in the second bar portion (51b) less than the length of the second bar portion (51b) of piston rod (51); Wherein the anterior end surface of piston (56) can cooperate with step between the second bar portion (51b) with the first bar portion (51a), is communicated with fluid between described gap (57) thereby blocking-up is positioned at piston (56) ante-chamber before;

Wherein, spring guide (54) is connected with the 3rd bar portion (51c) of piston rod (51), spring guide (54) is provided with oil groove (55) in its anterior end surface, and the back cavity that described oil groove (55) is used for being positioned at spring guide (54) rear side is communicated with described gap (57) fluid.