CN201133440Y

CN201133440Y - Elastic colloid buffer

Info

Publication number: CN201133440Y
Application number: CNU2007201904846U
Authority: CN
Inventors: 宫树森; 王庆; 于龙; 程云艳
Original assignee: BEIJING JZTH BUFFER TECHNOLOGY Co Ltd
Current assignee: BEIJING JZTH BUFFER TECHNOLOGY Co Ltd
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-10-15
Anticipated expiration: 2017-11-30

Abstract

The utility model relates to an elastic rubber buffer which is provided with a cylinder and a piston rod; one end of the cylinder is open and the other end is closed; the open end is provided with a cylinder cover; the cylinder is fully filed with elastic rubber with specified pressure; the piston rod goes through the cylinder cover, extends into the cylinder and can move axially; a piston is fixed on one end of the piston rod which is arranged in the cylinder, and the other end of the piston rod extends out of the cylinder; a first piston ring is inlaid on the peripheral of the piston; the piston slides in a sealed space relative to the inner wall of the cylinder; a plurality of damping holes and one-way valves are axially arranged on the piston. The elastic rubber buffer of the utility model regulates the performance by regulating the size of the damping holes, overcomes the deficiencies of the prior art and enlarges the damping force regulating scope; adoption of two independent seals greatly extends the service life of the buffer; the elastic rubber buffer has the advantages of simple structure, small size, excellent and stable performance.

Description

Elastic colloid buffer

Technical Field

The utility model relates to a buffer, in particular to an elastic colloid buffer which adopts an elastic colloid material as a buffer medium.

Background

Most of the currently known dampers are pneumatic springs, hydraulic dampers, gas-liquid dampers, spring dampers, etc., and are used for protecting industrial equipment, reducing noise, etc. The media of the buffer are mostly hydraulic oil or nitrogen gas and the like, and due to the technical problem of sealing, the buffer has the obvious defects of leakage, short service life, large volume, low absorption rate, inconvenient maintenance and the like.

Therefore, an elastic colloid used as a buffer medium has certain viscosity, compressibility and recoverability without external force. The elastic colloid is a high molecular synthetic material which is widely applied to the design and manufacture of industrial shock absorbers abroad and is continuously perfected and developed in the past decades. The performance characteristics of the elastic colloid are as follows:

1. viscosity: the viscosity is between 500000 and 20000000cst, and is formed by the viscous property of elastic colloid, and this condition generates extremely high viscous friction which is far higher than the property of common hydraulic oil with viscosity of only 50 to 500 cst. The viscosity determines its cushioning properties.

2. Compression performance: when the elastic gel is compressed by the application of an external force, the internal pressure of the elastic gel rises significantly, and when the pressure is increased to 4000bar, the shrinkage rate is about 15%, and the compressibility determines its elastic properties.

3. The advantages are that: the most remarkable advantages of the elastic colloid are as follows: in a single piece device, the elastic gel can provide energy dissipation and energy storage in the proportions required to solve the problem, thereby eliminating vibration and absorbing external impact energy. It has high viscosity, compressibility, obvious heat stability and chemical stability, no ageing and other advantages.

Fig. 1 shows a known elastic gel buffer 20. The buffer of this structure has the following disadvantages:

1. the dynamic reaction force of the buffer 20 is generated by the elastic rubber flowing through the annular gap 201, the size of the annular gap 201 is not easy to control, the size of the gap is unstable, and the performance of the buffer is not stable enough.

2. In order to generate enough large dynamic counter force, the annular gap 201 is generally very small, and in the moving process, due to the lack of guiding, the outer wall of the piston and the inner wall of the cylinder barrel are easy to scratch, so that the original performance of the buffer is damaged, unsafe factors of the cylinder barrel, the piston and other parts are increased, and the service life of the buffer is shortened.

3. The guide part 202 for the piston rod is only arranged at the cylinder cover, the guide length is too small, the piston rod extends into the cylinder barrel in the impact process, the piston forms a suspension wall end at the moment, the piston rod is easy to bend and deform in the impact process, and when the annular gap between the piston and the cylinder barrel is small, the piston is easy to deflect and scratches the inner wall of the cylinder barrel.

4. When the return is performed, the damping force is too large, the response is too slow, and the low-temperature performance is extremely poor.

Chinese patent No. ZL200410062249.1 also discloses "a viscous damping buffer", which is a shock absorber, in which the known structure is that after the external force is removed, the piston and the piston rod stay at the current position and do not rebound. The damping mode that adopts in this structure is aperture and clearance, consequently, still exists the not good control of the size of above-mentioned annular clearance, and the clearance size is unstable, causes the buffer performance not stable enough to and only there is piston rod one end to support, and the piston just formed a suspension end in the motion process, causes the defect that the piston rod of impact in-process takes place bending deformation easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an elastic colloid buffer, this elastic colloid buffer can overcome above-mentioned well-known technique's defect effectively, avoids the piston to produce when the motion and intervene with the cylinder within a definite time, has improved the motion stationarity.

Another object of the present invention is to provide an elastic gel buffer, which can effectively change the performance curve of the buffer and enhance the low temperature performance of the buffer.

It is still another object of the present invention to provide an elastic gel buffer which can easily adjust the damping force of the buffer.

Therefore, the utility model provides a pair of elastic colloid buffer, wherein, elastic colloid buffer has:

one end of the cylinder body is an open end, the other end of the cylinder body is a closed end, and a cylinder cover is arranged at the open end; the cylinder body is filled with elastic colloid with specified pressure;

the piston rod penetrates through the cylinder cover, extends into the cylinder body and can move along the axial direction; one end of the piston rod, which is positioned in the cylinder body, is fixed with a piston, and the other end of the piston rod extends to the outside of the cylinder body;

a first piston ring is embedded in the periphery of the piston, and the piston slides in a sealing way relative to the inner wall of the cylinder body; the piston is provided with a plurality of damping holes and one-way valves along the axial direction.

The elastic gel buffer as described above, wherein the check valve has a valve body and a spring, and is accommodated in a through hole provided in the piston; a reducing small-caliber hole is formed at one end of the through hole, and the opening end of the small-caliber hole faces to one side of the piston connected with the piston rod; the valve body can be accommodated in the through hole in a way of closing the reducing small-caliber hole and is positioned at the front part of the reducing small-caliber hole; one end of the spring abuts against the valve body, the other end of the spring abuts against the fixing bolt, the bolt is connected with the through hole, and a circulation channel is formed between the bolt and the piston.

The elastic colloid damper as described above, wherein the bolt has a through hole in a middle portion thereof, and the through hole constitutes a flow passage between the bolt and the piston.

The elastic colloid buffer as described above, wherein at least one groove is axially provided on the inner circumferential wall of the through hole of the bolt or the piston.

The elastic rubber buffer as described above, wherein the outer circumferential surface of the bolt has at least one flat surface in the axial direction.

The elastic colloid buffer, wherein the damping holes and the one-way valves are uniformly distributed on the piston, and the damping holes and the one-way valves are arranged in a staggered manner.

The elastic colloid buffer is characterized in that at least one supporting and guiding ring matched with the piston rod is arranged on the inner periphery of the cylinder cover.

The elastic colloid damper as described above, wherein the number of the sealing members equal to the number of the support guide rings is provided on the inner periphery of the cylinder head, and the support guide rings are provided on the side of the sealing members closer to the outside of the cylinder head.

The elastic rubber buffer as described above, wherein the inner circumference of the cylinder head is provided with a second piston ring cooperating with the piston rod.

The elastic gel buffer as described above, wherein the second piston ring is disposed near an inner side of the cylinder body; the support guide ring and the seal are both disposed outside the second piston ring.

The utility model discloses an elastic colloid buffer's characteristics and advantage are:

1. the utility model discloses simple structure has realized the purpose that improves shock-absorbing capacity and stability through this simple structure.

2. Because the elastic colloid is used as a medium and is a semi-fluid high polymer material, the requirement on sealing is reduced, and the service life of the buffer can be prolonged.

3. The utility model discloses an elastic colloid buffer bears pressure parts has higher intensity to have good support, consequently the stress is better, moves steadily.

4. The elastic colloid buffer of the utility model has reasonable sealing design, and the cylinder cover is provided with the piston ring, so that the acting force of the high-pressure colloid on the sealing can be relieved in the moving process; meanwhile, the fit clearance between the support guide ring and the piston rod is small, and the sealed cold flow is reduced to the maximum extent. The above measures will greatly improve the service life of the buffer.

5. The utility model discloses sealed adopting twice independent seal (the sealed exclusive action of twice promptly, both making one sealed inefficacy, do not influence one other sealed yet), twice is sealed all has independent support direction, reduces sealed cold flow, improves sealed life greatly, prolongs the life of buffer simultaneously.

6. The utility model discloses an elastic colloid buffer, the size through adjusting the damping hole comes the regulation performance, has overcome among the well-known art through the defect of annular gap regulation performance. Because the controllability of the small hole area is far larger than that of the annular area, the performance is convenient to adjust, and the performance stability is high. In addition, because the piston and the cylinder body and the piston rod and the cylinder cover are guided by the piston ring and the supporting guide ring, the piston and the piston rod have guide at the same time in the moving process, and the stability of the moving process is greatly improved. Simultaneously, for avoiding taking place the problem that piston and cylinder inner wall take place to interfere among the well-known structure, the annular gap can not be very little, and the utility model discloses a damping hole can be processed very little, has consequently enlarged the control range of damping force.

7. Through being in the utility model discloses a set up the check valve on the piston, very big change the performance curve of buffer, strengthened the low temperature performance of buffer. In the movement process, the one-way valve is sealed during the process (namely the pressing-in process), and the damping is generated by the damping hole to generate dynamic counter force; the one-way valve is completely opened in the return stroke (namely the ejection process), the damping is composed of the damping hole and the opened one-way valve, the damping hole is equivalently enlarged, and the low-temperature resistance of the buffer and the response coefficient of the buffer are improved.

8. The utility model discloses a buffer simple structure, small, excellent performance and stability.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

FIG. 1 is a schematic view of a conventional elastic gel buffer;

FIG. 2 is a schematic structural view of the elastic rubber buffer of the present invention;

FIG. 3 is an enlarged partial schematic view at I of FIG. 2;

FIG. 4 is a schematic view of the pressing process of the elastic rubber buffer of the present invention;

fig. 5 is a schematic diagram of the popping process of the elastic colloid buffer of the present invention;

FIG. 6 is a schematic front view of a piston of the elastic gel damper of the present invention;

FIG. 7 is a schematic cross-sectional view taken along line A-A of FIG. 6;

FIG. 8 is a schematic rear view of a piston of the elastic gel damper of the present invention;

fig. 9A and 9B are views showing an embodiment of a bolt structure of a check valve of an elastic rubber buffer according to the present invention;

fig. 10A and 10B are views showing another example of the bolt structure of the check valve of the elastic rubber buffer according to the present invention;

fig. 11A and 11B are views showing another example of the bolt structure of the check valve of the elastic rubber buffer according to the present invention;

fig. 12 is a schematic cross-sectional view of the elastomeric snubber of the present invention, the cross-sectional position being along the line B-B of the piston in fig. 6.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 2, 3 and 12, the elastic rubber body buffer 10 of the present invention includes: a cylinder body 101 with one end being an open end and the other end being a closed end, and a cylinder cover 102 being arranged at the open end of the cylinder body; the cylinder 101 is filled with an elastic gel 103. A piston rod 104 extends into the cylinder 101 through the cylinder head 102 and can move axially; a piston 105 is fixed at one end of the piston rod 104 positioned in the cylinder 101, and the other end of the piston rod extends to the outside of the cylinder 101; a first piston ring 1051 is embedded in the outer periphery of the piston 105, and the piston ring 1051 performs the dual function of sealing and guiding when the piston 105 slides within the cylinder. Referring to fig. 6, 7 and 8, the piston 105 is provided with a plurality of damping holes 1055 and check valves 1053 along the axial direction.

As shown in fig. 3, 6, 7 and 8, the check valve 1053 includes a valve body 10531 and a spring 10532, and is accommodated in a through-hole 1052 provided in the piston 105, and one end of the through-hole 1052 forms a small-diameter hole 1056 with a reduced diameter; the valve body 10531 is accommodated in the through hole 1052 and located in front of the reduced-diameter small-diameter hole 1056, and can close the reduced-diameter small-diameter hole 1056 under the action of the spring 10532; one end of the spring 10532 abuts against the valve body 10531, and the other end abuts against the fixing bolt 10533, the bolt 10533 is connected to the through hole 1052, and a flow passage 1054 is formed between the bolt 10533 and the piston 105. In the structure of the present invention, the opening end of the small-bore hole 1056 faces to one side of the piston 105 connected to the piston rod 104, so that the check valve 1053 is closed in the process of pressing in the piston, and is opened in the rebound process of the piston 105.

Preferably, the bolt 10533 has a through hole 10534 in the middle thereof, as shown in fig. 9A and 9B, wherein fig. 9A is a schematic top view and fig. 9B is a schematic cross-sectional view. When the elastic rubber body 103 pushes the valve body 10531 to the right side in the figure to separate the valve body 10531 from the small-diameter hole 1056, the elastic rubber body can flow from one side to the other side of the piston 105 through the flow passage formed by the through hole 10534.

Another preferred example is as shown in fig. 10A and 10B, in which fig. 10A is a schematic front view, and fig. 10B is a schematic cross-sectional view taken along line C-C in fig. 10A. At least one groove 10535 for allowing the elastic gel to pass therethrough is provided in the axial direction on the bolt 10533 or on the inner peripheral wall of the through-hole 1052 of the piston 105, and fig. 10A and 10B show a structure in which two grooves 10535 are provided on the bolt 10533.

Still another preferred example is as shown in fig. 11A and 11B, where fig. 11A is a schematic top view, and fig. 11B is a schematic E-direction view of fig. 11A. At least one flat surface 10536 is axially formed on the outer peripheral surface of the bolt 10533, so that a gap is formed between the bolt 10533 and the through-hole 1052, and the gap forms a flow channel 1054 through which the elastic rubber can pass. As shown in fig. 2, 3, 11A, and 11B, two parallel flat surfaces 10536 may be formed on both side surfaces of the bolt 10533, respectively, so that two flow channels 1054 may be formed between the bolt and the through hole.

In this embodiment, the damping holes 1055 and the check valves 1053 are uniformly distributed on the piston 105, and the damping holes 1055 and the check valves 1053 are alternately arranged.

Further, a second piston ring 1022 that engages with the piston rod 104 is provided on the inner periphery (right direction in the drawing) of the cylinder head 102 near the inside of the cylinder block 105. During the movement of the piston rod 104, the second piston ring 1022 can simultaneously perform the sealing and guiding functions, and can relieve the instantaneous high pressure generated in the cylinder during the pressing-in process of the piston rod 104.

The utility model discloses be equipped with the twice independent sealedly that constitutes by sealing member 1023 in the cylinder cap 102 interior week with piston rod 104 matched with, two sealing member 1023 independent actions promptly, even sealed inefficacy together does not influence the sealing performance of another sealing member 1023 yet. And all there is independent support guide ring 1021 at two sealing members 1023, support guide ring 1021 sets up sealing member 1023 is close to cylinder cap 102 foreign side, plays to reduce the cold flow of sealed, improves sealing member 1023's life greatly, prolongs the life of buffer simultaneously. The two support guide rings 1021 and the seal 1023 are both disposed outside (in the left direction in the drawing) the second piston ring 1022. The utility model discloses a setting is in on the cylinder cap 102 second piston ring 1022, two support guide ring 1021 and setting are in the direction support to two positions of piston rod and piston is constituted to first piston ring 1051 on the piston 105 outer peripheral face, make the motion of piston 105 and piston rod 102 more steady.

The support guide ring 1021 is preferably a known support guide ring having a self-lubricating function to reduce frictional resistance during movement.

The utility model discloses a theory of operation is: as shown in fig. 4, the process of pressing the piston is shown. Under the action of the external force F, the piston rod 104 drives the piston 105 to move in the direction to the right in the figure, that is, the elastic colloid 103 in the cavity B on the right side of the piston 105 is pressed, so that the elastic colloid in the cavity B on the right side of the piston flows to the cavity C on the left side of the piston through the damping hole 1055 arranged on the piston 105, and the arrow D in the figure indicates the flowing direction of the elastic colloid. Because the utility model discloses a structure of damping hole, consequently can conveniently control the size of damping force. That is, the damping hole 1055 may be formed to have a predetermined size according to the use requirement so as to obtain a required damping force. At this time, the check valve 1053 is closed by the elastic gel in the B chamber, and the small diameter hole 1056 of the piston 105 is sealed by the valve body 10531, so that the elastic gel cannot flow through the through hole 1052.

With the known structure difference of controlling the size of damping force through the clearance between piston and cylinder body, the utility model discloses a damping hole can be very little, still probably guarantees the steady movement between piston and the cylinder body, and can not produce the annular gap that exists in the known structure between piston and the cylinder body very little, leads to piston and cylinder body inner wall to take place the problem of interfering.

As shown in fig. 5, the ejection process of the piston rod 104 is shown when the external force F is removed. During the pressing-in process of the piston rod 104, the elastic colloid 103 flows through the damping hole 1055 on the piston 105 to generate damping force. When the piston 105 reaches the final position, the flow of the elastic gel 103 is stopped, and the elastic gel 103 in the left and right chambers C, B of the piston 105 is substantially isobaric. When the external force F acting on the piston rod 104 is removed, the piston rod 104 is restored to the initial position due to the compressibility and recovery of the elastic gel 103 itself. In the rebound process, due to the resilience of the elastic colloid 103, the restoring force pushes the piston rod 104 back to the initial position, due to the existence of the restoring force of the elastic colloid, the elastic colloid in the C cavity of the cylinder body flows to the B cavity through the damping hole 1055, meanwhile, the valve body 10531 of the one-way valve is pushed to the right side in the figure, the diameter-reducing small-diameter hole 1056 is opened, and the one-way valve is about to be completely opened, at the moment, the damping is formed by the damping hole 1055 and the opened one-way valve 1053, which is equivalent to increasing the damping hole, reducing the return damping and improving the return speed, so that the performance curve of the buffer is greatly changed by arranging the one-way valve 1053, and the response coefficient and the low-temperature resistance of the buffer are enhanced. The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims

1. An elastic gel bumper, comprising:

2. The elastic gel bumper of claim 1 wherein the check valve has a valve body and a spring, the check valve being received in a through-hole provided in the piston; a reducing small-caliber hole is formed at one end of the through hole, and the opening end of the small-caliber hole faces to one side of the piston connected with the piston rod; the valve body can be accommodated in the through hole in a way of closing the reducing small-caliber hole and is positioned at the front part of the reducing small-caliber hole; one end of the spring abuts against the valve body, the other end of the spring abuts against the fixing bolt, the bolt is connected with the through hole, and a circulation channel is formed between the bolt and the piston.

3. An elastic gel damper according to claim 2 wherein said bolt has a through hole in the middle thereof, said through hole forming a flow path between the bolt and the piston.

4. An elastic gel bumper according to claim 2 wherein the through hole of said bolt or piston has at least one groove axially formed in the inner peripheral wall thereof.

5. An elastomeric bumper according to claim 2 wherein said bolt has an outer peripheral surface with at least one flat surface in an axial direction.

6. An elastic gel buffer as claimed in claim 1 wherein said orifice and check valve are uniformly disposed on said piston and said orifice and said check valve are staggered.

7. An elastic gel damper according to claim 1 wherein said cylinder head has at least one support guide ring on its inner periphery for engaging said piston rod.

8. The elastic gel bumper according to claim 7, wherein a number of sealing members equal to the number of the support guide rings are provided on an inner periphery of the cylinder head, and the support guide rings are provided on a side of the sealing members adjacent to an outer side of the cylinder head.

9. A resilient gel damper according to claim 7 or 8 wherein said cylinder head is provided at its inner periphery with a second piston ring cooperating with said piston rod.

10. The elastomeric snubber of claim 8, wherein the second piston ring is disposed proximate to an inner side of the cylinder; the support guide ring and the seal are both disposed outside the second piston ring.