阅读说明：本技术 一种双油缸单出杆式粘滞流体阻尼器 (Double-oil-cylinder single-rod viscous fluid damper ) 是由 苏毅 田嘉诚 施镐 于 2021-08-23 设计创作，主要内容包括：本发明公开了一种双油缸单出杆式粘滞流体阻尼器,包括活塞装置、前盖板、内缸、外缸、后盖板。当活塞装置向前运动时,粘滞流体首先被活塞从内缸的前阻尼孔推出,流入外缸,随着活塞装置的继续运动,粘滞流体从内缸的后阻尼孔再次由外缸流入内缸。相较于普通单出杆式粘滞流体阻尼器,该装置由于把阻尼孔从活塞转移到内缸前、后部,在有限的长度内提升了阻尼力,提高了阻尼效率,并且,在外缸上开有泄压孔,有效地解决了单出杆式粘滞流体阻尼器活塞前、后部压强不平衡问题,无需另设调节装置,另外,由于所有构件均采用螺纹连接,便于前期加工制作组装以及后期维护、检修及更换。(The invention discloses a double-oil-cylinder single-rod viscous fluid damper which comprises a piston device, a front cover plate, an inner cylinder, an outer cylinder and a rear cover plate. When the piston device moves forward, the viscous fluid is firstly pushed out from the front damping hole of the inner cylinder by the piston and flows into the outer cylinder, and along with the continuous movement of the piston device, the viscous fluid flows into the inner cylinder from the outer cylinder again from the rear damping hole of the inner cylinder. Compared with the common single-rod viscous fluid damper, the damping device has the advantages that the damping holes are transferred from the piston to the front part and the rear part of the inner cylinder, the damping force is improved within a limited length, the damping efficiency is improved, in addition, the pressure relief holes are formed in the outer cylinder, the problem of unbalanced pressure of the front part and the rear part of the single-rod viscous fluid damper piston is effectively solved, an adjusting device is not required to be additionally arranged, and in addition, due to the fact that all components are connected through threads, the single-rod viscous fluid damper is convenient to machine, manufacture and assemble in the early stage and maintain, overhaul and replace in the later stage.)

1. The utility model provides a two hydro-cylinders list goes out pole formula viscous fluid damper which characterized in that: the double-oil-cylinder single-rod viscous fluid damper mainly comprises a piston device (1), a front cover plate (2), an inner cylinder (3), an outer cylinder (4) and a rear cover plate (5), wherein the piston device (1) is arranged in the inner cylinder (3), the communicating hole (11) penetrating through the front cover plate (2) extends out, the piston device (1) freely moves in the inner cylinder (3), one end of the inner cylinder (3) is screwed into the front cover plate (2) through threads, the other end of the inner cylinder is screwed into the rear cover plate (5) through threads, one end of the outer cylinder (4) is screwed into the front cover plate (2) through threads, the other end of the outer cylinder is screwed into the rear cover plate (5) through threads, a pressure relief hole (15) in the middle of the outer cylinder (4) is located on the upper side of the whole device after installation is completed, a front damping hole (13) in the inner cylinder (3) and a front cover plate damping hole (12) in the front cover plate (2) form a passage, and a rear damping hole (14) in the inner cylinder (3) and a rear cover plate damping hole (20) in the rear cover plate (5) form a passage.

2. The dual-cylinder single-rod viscous fluid damper of claim 1, wherein: the piston device (1) is formed by welding a piston rod (6) and a piston (7), the piston (7) is a steel concentric circular cylinder, the outer diameter of the piston is matched with the inner diameter of the inner cylinder (3), the piston rod (6) is a steel round rod, a piston device connecting hole (8) is formed in the position where the piston device is connected with the vibration damping structure, and the piston device (1) reciprocates to enable viscous fluid in the inner cylinder (3) and the outer cylinder (4) to flow through the front damping hole (13) and the rear damping hole (14) to generate damping force.

3. The dual-cylinder single-rod viscous fluid damper of claim 1, wherein: the front cover plate (2) is provided with a front inner cylinder connecting plate (9) and a front outer cylinder connecting plate (10), the inner part of the front inner cylinder connecting plate (9) is subjected to tapping treatment and is matched with the threads at the end part of the inner cylinder (3), a front cover plate damping hole (12) is also arranged at the position, corresponding to the front damping hole (13) on the inner cylinder (3), on the front inner cylinder connecting plate (9), the inner part of the front outer cylinder connecting plate (10) is subjected to tapping treatment and is matched with the threads at the end part of the outer cylinder (4), and a communication hole (11) is formed in the middle of the front cover plate (2).

4. The dual-cylinder single-rod viscous fluid damper of claim 1, wherein: the main body of the inner cylinder (3) is a cylinder body, a front damping hole (13) is formed in one end of the inner cylinder, a rear damping hole (14) is formed in the other end of the inner cylinder, tapping is conducted on the two ends of the inner cylinder, and the inner cylinder is matched with threads of a front inner cylinder connecting plate (9) and a rear inner cylinder connecting plate (16).

5. The dual-cylinder single-rod viscous fluid damper of claim 1, wherein: the main body of the outer cylinder (4) is a cylinder body, both ends of the outer cylinder are subjected to tapping treatment and are matched with the threads of the front outer cylinder connecting plate (10) and the rear outer cylinder connecting plate (17), and the middle part of the outer cylinder (4) is provided with a pressure relief hole (15).

6. The dual-cylinder single-rod viscous fluid damper of claim 1, wherein: rear cover plate (5) are provided with back inner cylinder connecting plate (16) and back outer cylinder connecting plate (17) on it, do the tapping processing in back inner cylinder connecting plate (16) inside, with the screw thread phase-match of inner cylinder (3) tip, and on back inner cylinder connecting plate (16), also be provided with back apron damping hole (20) with back damping hole (14) corresponding position on inner cylinder (3), do the tapping processing in back outer cylinder connecting plate (17) inside, with the screw thread phase-match of outer cylinder (4) tip, be provided with connecting rod (18) in back cover plate (5) middle part outside, it has back apron connecting hole (19) to open with the vibration damping structure department of being connected.

Technical Field

The invention relates to the field of viscous fluid dampers, in particular to a double-oil-cylinder single-rod type viscous fluid damper.

Background

At present, a common single-rod viscous fluid damper has three obvious defects, namely, an inner cylinder of the viscous fluid damper is divided into two oil chambers by a piston, one oil chamber is provided with a piston rod, and the other oil chamber is not provided with the piston rod, so that when the piston slides back and forth, the two oil chambers of the inner cylinder always have the volume difference of the viscous fluid, therefore, an adjusting device needs to be additionally arranged or a double-rod mode is adopted in the using process, the length of the damper is greatly increased, and the damper cannot be installed under many conditions; secondly, because the damping hole of the current viscous fluid damper is arranged on the piston, the length of the damping hole determines the mechanical parameters of the damper, so that the piston is often very long, and the length of the damper is increased; thirdly, the pressure of an oil cavity of the conventional viscous fluid damper is high during vibration reduction, the oil leakage from a driven sealing part becomes a common problem, and the vibration reduction capability of the viscous fluid damper can be completely lost if the oil leakage is large.

In order to reduce the pressure of the oil chamber, some methods are proposed at home and abroad, for example, patent No. CN 202010695763Y discloses a serial variable damping viscous fluid damper, which adopts a mode of connecting two viscous fluid dampers in series to increase the damping force, i.e. under the same total damping force, the oil chamber pressure can be greatly reduced and the risk of oil leakage can be reduced when the device is adopted, but the device has the defects of overlong length and low damping efficiency.

Aiming at the existing situation, the invention adopts the nesting mode of two cylinder bodies, the front damping hole and the rear damping hole are arranged, the distance between the front damping hole and the rear damping hole determines the mechanical parameters of the damper, the damping efficiency of the device is greatly improved, and the length of the device is effectively shortened. And the outer cylinder is provided with a pressure relief hole, and the viscous fluid is communicated with the atmosphere, so that the pressure of the viscous fluid is always at one atmospheric pressure, and an adjusting device is not required to be additionally arranged. In addition, all the structures are connected by threads, so that the processing, manufacturing and assembling in the early stage and the maintenance, overhaul and replacement in the later stage are facilitated.

Disclosure of Invention

For convenience of description, the left, right, up and down are defined as directions shown in the abstract drawings, and it is specified that the motion from left to right is a forward motion and the motion from right to left is a backward motion.

In view of the above-mentioned problems, the present invention is a dual-cylinder single-rod viscous fluid damper, comprising a piston device, a front cover plate, an inner cylinder, an outer cylinder, and a back cover plate. When the piston device moves forwards, the viscous fluid is firstly pushed out from the front damping hole on the inner cylinder by the piston and flows into the outer cylinder, and along with the continuous movement of the piston device, the viscous fluid flows into the inner cylinder again from the outer cylinder from the rear damping hole on the inner cylinder. The invention aims to provide a double-oil-cylinder single-rod viscous fluid damper which is high in damping efficiency, long in service life, suitable for various scenes and convenient to maintain, overhaul and replace.

The invention is realized by adopting the following technical scheme:

a double-oil-cylinder single-rod viscous fluid damper mainly comprises a piston device, a front cover plate, an inner cylinder, an outer cylinder and a rear cover plate, wherein the piston device is arranged in the inner cylinder and extends out through a communication hole of the front cover plate, the piston device freely moves in the inner cylinder, one end of the inner cylinder is screwed into the front cover plate through threads, the other end of the inner cylinder is screwed into the rear cover plate through threads, one end of the outer cylinder is screwed into the front cover plate through threads, the other end of the outer cylinder is screwed into the rear cover plate through threads, a pressure relief hole in the middle of the outer cylinder is formed in the upper side of the whole device after the installation is completed, a passage is formed between a front damping hole in the inner cylinder and a damping hole in the front cover plate and used for viscous fluid to flow to generate damping force, and a passage is formed between a rear damping hole in the inner cylinder and a damping hole in the rear cover plate and used for viscous fluid to flow to generate damping force.

The piston device is formed by welding a piston rod and a piston, the piston is a steel concentric circular cylinder, the outer diameter of the piston is matched with the inner diameter of the inner cylinder, the piston rod is a steel circular rod, a connecting hole of the piston device is formed in the position where the piston rod is connected with the vibration damping structure, and the reciprocating motion of the piston device enables viscous fluid in the inner cylinder and the outer cylinder to flow through the front damping hole and the rear damping hole to generate damping force.

The front cover plate is provided with a front inner cylinder connecting plate and a front outer cylinder connecting plate, the inner diameter of the front inner cylinder connecting plate is matched with the outer diameter of the inner cylinder, tapping processing is carried out inside the front inner cylinder connecting plate and is matched with the threads at the end part of the inner cylinder, the inner cylinder can be screwed into the front cover plate through the threads, a front cover plate damping hole is also arranged on the front inner cylinder connecting plate and corresponds to the front damping hole on the inner cylinder, after the inner cylinder is screwed into the front cover plate, the front damping hole and the front cover plate damping hole of the two parts can form a passage for viscous fluid to flow to generate damping force, the inner diameter of the front outer cylinder connecting plate is matched with the outer diameter of the outer cylinder, tapping processing is carried out inside the front outer cylinder connecting plate and is matched with the threads at the end part of the outer cylinder, the outer cylinder can be screwed into the front cover plate through the threads, and a communication hole is formed in the middle of the front cover plate and is used for a piston rod to extend out.

The main body of the inner cylinder is a cylinder body, a front damping hole is formed in one end of the inner cylinder and matched with a front cover plate damping hole on a front cover plate, the inner cylinder is screwed into the front cover plate, a passage can be formed between the front damping hole and the front cover plate damping hole of the two parts, viscous fluid can flow through the front damping hole to generate damping force, a rear damping hole is formed in the other end of the inner cylinder and matched with a rear cover plate damping hole on a rear cover plate, the inner cylinder is screwed into the rear cover plate, a passage can be formed between the rear damping hole of the two parts and the rear cover plate damping hole, viscous fluid can flow through the rear damping hole to generate damping force, tapping processing is carried out on the two ends of the inner cylinder and matched with threads of a front inner cylinder connecting plate and a rear inner cylinder connecting plate, and the inner cylinder can be screwed into the front cover plate and the rear cover plate through threads.

The main body of the outer cylinder is a cylinder body, tapping processing is carried out on two ends of the outer cylinder and is matched with threads of a front outer cylinder connecting plate and a rear outer cylinder connecting plate, the outer cylinder can be screwed into a front cover plate and a rear cover plate through threads, a pressure relief hole is formed in the middle of the outer cylinder, the outer cylinder is screwed into the front cover plate and the rear cover plate through threads, and the pressure relief hole is formed in the upper portion of the whole device and used for eliminating pressure difference between the front portion and the rear portion of the piston.

The rear cover plate is provided with a rear inner cylinder connecting plate and a rear outer cylinder connecting plate, the inner diameter of the rear inner cylinder connecting plate is matched with the outer diameter of the inner cylinder, tapping processing is performed inside the rear inner cylinder connecting plate and is matched with the threads at the end part of the inner cylinder, the inner cylinder can be screwed into the rear cover plate through threads, a rear cover plate damping hole is also formed in the position, corresponding to the rear damping hole in the inner cylinder, on the rear inner cylinder connecting plate, the rear damping hole of the two parts after the inner cylinder is screwed into the rear cover plate and the rear cover plate damping hole can form a passage for viscous fluid to flow to generate damping force, the inner diameter of the rear outer cylinder connecting plate is matched with the outer diameter of the outer cylinder, tapping processing is performed inside the rear outer cylinder connecting plate and is matched with the threads at the end part of the outer cylinder, the outer cylinder can be screwed into the rear cover plate through threads, a connecting rod is arranged on the outer side of the middle part of the rear cover plate, and a rear cover plate connecting hole is formed in the position connected with the vibration damping structure.

The double-oil-cylinder single-rod viscous fluid damper provided by the invention has the following beneficial effects:

when the double-oil-cylinder single-rod type viscous fluid damper provided by the invention bears an external load, the piston device moves forwards, so that viscous fluid in the inner cylinder moves forwards, flows into the outer cylinder from the inner cylinder after passing through the front damping hole for the first time, flows into the inner cylinder from the outer cylinder through the rear damping hole again along with the continuous movement of the piston, and effectively solves the problem of unbalanced pressure at two sides of the piston because the outer cylinder is connected with the external atmosphere. Compared with the single-rod viscous fluid damper in the prior art, the double-oil-cylinder single-rod viscous fluid damper provided by the invention adopts a double-oil-cylinder nesting mode, and as the viscous fluid can pass through the damping hole twice in the movement process, the damping force is greatly improved within a limited length, the damping efficiency of the damper is improved, and the application scenes of the damper are increased. Due to the design of the pressure relief hole on the outer cylinder, a pressure adjusting device does not need to be additionally arranged. In addition, due to the application of the threads, the invention can be processed, manufactured and finally assembled according to parts in different factories, is convenient to maintain and overhaul and has strong practicability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a detailed view of a piston device of a dual cylinder single rod viscous fluid damper according to an embodiment of the present invention;

FIG. 2 is a detailed view of a front cover plate of a dual-cylinder single-rod viscous fluid damper according to an embodiment of the present invention;

FIG. 3 is a detailed view of an inner cylinder of a dual-cylinder single-rod viscous fluid damper according to an embodiment of the present invention;

FIG. 4 is a detailed view of an outer cylinder of a dual cylinder single rod viscous fluid damper according to an embodiment of the present invention;

FIG. 5 is a detailed view of a rear cover plate of a dual-cylinder single-rod viscous fluid damper according to an embodiment of the present invention;

FIG. 6 is a side view of a back cover plate of a dual cylinder single rod viscous fluid damper in accordance with an embodiment of the present invention;

FIG. 7 is a schematic structural view of a dual-cylinder single-rod viscous fluid damper according to an embodiment of the present invention;

fig. 8 is a cross-sectional view of a dual-cylinder single-rod viscous fluid damper according to an embodiment of the present invention.

In the drawings, 1-a piston device; 2-front cover plate; 3-inner cylinder; 4-outer cylinder; 5-a rear cover plate; 6-a piston rod; 7-a piston; 8-piston means connection hole; 9-front inner cylinder connecting plate; 10-front outer cylinder connecting plate; 11-a communicating hole; 12-front cover plate damping holes; 13-front damping orifice; 14-rear orifice; 15-pressure relief holes; 16-rear inner cylinder connecting plate; 17-rear outer cylinder connecting plate; 18-a connecting rod; 19-rear cover plate attachment holes; and 20-rear cover plate damping holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are merely exemplary of the invention, which may be embodied in various forms and arrangements, and that elements of the embodiments of the invention generally described and illustrated in the accompanying drawings may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like symbols and letters represent like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like, indicate orientations or positional relationships that are conventionally used to place the product of the present invention, and are used for convenience in describing and simplifying the present invention, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "connected" and "mounted" are to be construed broadly and may be, for example, fixedly, detachably, integrally, mechanically, electrically, directly or indirectly through intervening media, or as a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the following, some embodiments of the invention are described in detail with reference to the drawings, and features in the following examples may be combined with each other without conflict.

Referring to fig. 1 to 8, a double-cylinder single-rod viscous fluid damper mainly comprises a piston device (1), a front cover plate (2), an inner cylinder (3), an outer cylinder (4) and a rear cover plate (5), wherein threads are arranged on the inner side of a front inner cylinder connecting plate (9) and the inner side of a front outer cylinder connecting plate (10) on the front cover plate (2), threads are arranged on both ends of the inner cylinder (3) and both ends of the outer cylinder (4), and threads are arranged on the inner side of a rear inner cylinder connecting plate (16) and the inner side of a rear outer cylinder connecting plate (17) on the rear cover plate (5).

In the embodiment, an inner cylinder (3) is connected with a front inner cylinder connecting plate (9) on a front cover plate (2) through threads at one end, the outer diameter of a piston (7) is consistent with the inner diameter of the inner cylinder (3), the diameter of a piston rod (6) is consistent with the diameter of a communicating hole (11) on the front cover plate (2), a piston device (1) is installed in the inner cylinder (3), the piston rod (6) penetrates through the communicating hole (11) of the front cover plate (2) to extend out, and after the inner cylinder (3) is connected with the front cover plate (2), a front damping hole (13) on the inner cylinder (3) and a front cover plate damping hole (12) on the front cover plate (2) form a passage to communicate the inner cylinder (3) with an outer cylinder (4).

In the embodiment, the outer cylinder (4) is connected with a front outer cylinder connecting plate (10) of the front cover plate (2) through threads at one end, and after the outer cylinder (4) is connected with the front cover plate (2), a pressure relief hole (15) in the middle of the outer cylinder (4) is positioned on the upper side of the whole device.

In the embodiment, the rear cover plate (5) is connected with the inner cylinder (3) through threads on a rear inner cylinder connecting plate (16) on the rear cover plate, is connected with the outer cylinder (4) through threads on a rear outer cylinder connecting plate (17) on the rear cover plate, and after the outer cylinder (4) is connected with the rear cover plate (5), a rear cover plate damping hole (20) on the rear cover plate (5) and a rear damping hole (14) on the inner cylinder (3) form a passage to communicate the inner cylinder (3) and the outer cylinder (4).

In the embodiment, the viscous fluid is stored in the inner cylinder (3) and the outer cylinder (4), the liquid level of the viscous fluid does not overflow from the pressure relief hole (15) on the outer cylinder (4) but does not overflow from the front damping hole (13) and the rear damping hole (14), and the viscous fluid is ensured not to leak from the pressure relief hole (15) when in use.

The present invention is not limited to the above-described preferred embodiments, but various modifications and changes can be made by those skilled in the art, and any modifications, equivalent substitutions, improvements, etc., which are within the principle of the present invention, are included in the scope of the present invention.