CN213013719U - Overhead damping chamber vibration isolator - Google Patents
Overhead damping chamber vibration isolator Download PDFInfo
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- CN213013719U CN213013719U CN202021223057.5U CN202021223057U CN213013719U CN 213013719 U CN213013719 U CN 213013719U CN 202021223057 U CN202021223057 U CN 202021223057U CN 213013719 U CN213013719 U CN 213013719U
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- damping
- hole
- bottom plate
- damping chamber
- vibration isolator
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Abstract
The utility model discloses an overhead damping chamber vibration isolator, which comprises a spring footstock, a boss, an axle seat, a damping cylinder, an intermediate shaft, a locking nut, a compression spring, a damping agent, a sealing ring and a detection device, wherein the spring footstock is arranged above the damping cylinder; the damping cylinder comprises a cylinder wall and a base; the spring top seat comprises a top plate, a damping chamber and a bottom plate; a step hole is formed in the center of the top plate; the side surface of the bottom plate is matched with the cylinder wall by using a sealing ring, the middle shaft is connected with the bottom plate and the base, and the upper end of the middle shaft is provided with a thimble; the compression spring and the damping agent are arranged between the base and the bottom spring top seat; the detection device comprises a sensor, a compression nut and a mounting nut; the mounting nut is connected with the step hole, a through hole is formed in the center of the mounting nut, and the sensor is fixed in the through hole through the compression nut. The utility model has simple structure and convenient use and maintenance; the upper damping chamber is arranged, the vibration reduction performance is good, the detection device is arranged, and a foundation is laid for intelligent detection of the failure of the vibration isolator.
Description
Technical Field
The utility model relates to a track damping technical field, concretely relates to overhead damping chamber isolator.
Background
With the rapid development of urban rail transit, it is imperative to reduce the vibration and noise impact of rail transit on the surrounding environment, so components such as steel rails and track beds all adopt corresponding vibration reduction measures, at present, methods such as vibration reduction of a rail lower bolster, vibration reduction of a rubber floating slab, vibration reduction of fasteners and the like are mainly adopted in urban rail transit, particularly in sensitive areas, the urban rail transit adopts a floating slab track bed, a steel spring damping vibration isolator or other elastic support devices to realize effective vibration reduction and noise reduction, and the prior art mainly adopts a steel spring and rubber composite vibration absorber or a single steel spring vibration absorber, so that the following defects exist: 1. the steel spring rubber composite shock absorber has small damping of rubber, poor environment adaptability and short service life; 2. the single steel spring shock absorber has poor radial bearing capacity, and in use, horizontal offset can occur under pressure; 3. the steel spring shock absorber is difficult to detect and overhaul.
SUMMERY OF THE UTILITY MODEL
The technical purpose is as follows: to current steel spring shock absorber and the not enough of combination shape structure existence thereof, the utility model discloses a structural strength is high, environmental adaptability is good, long service life and be provided with the overhead damping room isolator of inefficacy sensor.
The technical scheme is as follows: in order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides an overhead damping room isolator which characterized in that: the device comprises a spring top seat, a boss, a shaft seat, a damping cylinder, an intermediate shaft, a locking nut, a compression spring, a damping agent, a sealing ring and a detection device; the spring top seat is arranged above the damping cylinder; the compression spring and the damping agent are arranged in a spring cavity formed between the spring top seat and the damping cylinder;
the damping cylinder comprises a cylinder wall and a base; the cylinder wall is fixedly connected with the base, the upper part of the cylinder wall is provided with a step, and the center of the upper end surface of the base is fixedly connected with the shaft seat;
the spring top seat comprises a top plate, a damping chamber and a bottom plate; the top plate and the bottom plate are fixedly connected, a damping chamber is formed in the middle, and a step hole is formed in the center of the top plate; the bottom center of the bottom plate is fixedly connected with the boss, the bottom plate and the boss are provided with center holes, and the side surface of the bottom plate is matched and connected with the inner side surface of the cylinder wall.
The compression spring is positioned between the bottom plate and the base and sleeved on the boss and the shaft seat, and the damping agent is filled in a spring cavity between the bottom plate and the base;
the middle shaft is connected with the shaft seat and the bottom plate, the upper end of the middle shaft is provided with a thimble, and the thimble is positioned in the damping chamber;
the detection device comprises a sensor, a compression nut and an installation nut, the installation nut is fixed in a step hole, a through hole is formed in the center of the installation nut, the through hole is a step hole, a hole with a large diameter is located in the upper portion of the through hole, threads are arranged on the side face of the upper portion of the through hole, the sensor is fixed above the step of the through hole through the compression nut, the top of the ejector pin is located in the through hole, and the ejector pin and the sensor are located in the.
Preferably, the distance from the side surface of the bottom plate to the top end of the cylinder wall is greater than the distance from the thimble to the sensor.
Preferably, the distance between the top end of the ejector pin and the sensor is greater than the sum of the compression amount of the vibration isolator in the working state and the sensing distance of the sensor.
Preferably, one end of the intermediate shaft is fixedly connected with the shaft seat, the other end of the intermediate shaft penetrates through the central hole, and the intermediate shaft is fixed in the damping chamber by using a locking nut and a bottom plate.
Preferably, the intermediate shaft and the central bore are a clearance fit.
Preferably, the compression spring is sleeved between the shaft seat and the boss, and two ends of the compression spring are respectively sleeved on the boss and the shaft seat to limit the horizontal movement of the compression spring, so that the vertical state is kept, and the vibration reduction effect is improved.
Preferably, the top plate is provided with three mounting bolt holes which are uniformly distributed in the circumferential direction, so that the upper damping chamber vibration isolator can be conveniently mounted, and the vibration isolator can be prevented from rotating in the circumferential direction.
Preferably, the bottom end of the base is provided with a positioning hole.
Preferably, the top plate, the bottom plate and the boss may be integrally cast or joined by welding.
Preferably, the cylinder wall, the base and the shaft seat can be integrally cast or connected in a welding mode; the shaft seat is positioned in the center of the upper end face of the bottom plate, plays a role of a reinforcing structure with the middle shaft, and prolongs the service life.
The utility model discloses a damping agent fills in the spring cavity between a damping section of thick bamboo and spring footstock, the net volume of cavity reduces during the pressurized, the clearance between damping agent accessible jackshaft and the centre bore flows into in the damping chamber of top, the damping chamber plays the volume compensation effect, alleviate the pressure that the cavity received, absorb the vibration energy that partial compression spring received simultaneously, reduce overhead damping chamber isolator whole vibration, prevent that seal structure from damaging, and service life is prolonged, when pressure reduces, the damping agent gets back to in the spring cavity through jackshaft and bottom plate centre bore clearance.
The upper end of the utility model is fixed by the mounting bolt hole, and the bottom is fixed by the positioning hole; after the fixing is finished, when the upper damping chamber vibration isolator receives pressure from the upper part, the spring top seat moves downwards under the action of external pressure, the compression spring and the damping agent are compressed downwards, the net volume of a spring cavity body between the bottom plate and the base is reduced, the damping agent absorbs acting force applied to part of the compression spring, and the damping agent flows upwards into the damping chamber along a gap between the middle shaft and a center hole of the bottom plate under the action of the pressure.
Because the intermediate shaft and the base are fixed, when the spring top seat descends, the distance between the thimble and the sensor is shortened, and under a normal stress state, the distance between the top of the thimble and the sensor is greater than the sensing distance of the sensor, so that the upper damping chamber vibration isolator works normally; when the compression spring fails, the overall pressure-bearing capacity of the system is reduced, the descending distance of the spring top seat exceeds a normal range, the distance between the top of the thimble and the sensor is smaller than the sensing distance of the sensor, a signal is transmitted outwards, and the failure of the upper damping chamber vibration isolator at the position is displayed.
Has the advantages that: the top-mounted damping chamber vibration isolator has the advantages that the center of the bottom is provided with the positioning hole, the upper part is provided with the mounting bolt hole, the horizontal and circumferential movement of the vibration isolator can be avoided, the mounting is convenient, and the fixing is firm; an intermediate shaft is connected with the spring top seat and the damping cylinder inside, so that the overall structural strength is improved; the damping agent flows into the upper damping chamber when stressed, volume compensation is carried out, the whole pressure of the structure is relieved, the damping agent absorbs partial vibration energy, the load of the compression spring is reduced, and the service life of the compression spring is prolonged; the detection device is arranged, so that the failure condition of the upper damping chamber vibration isolator can be conveniently and accurately detected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a sectional top view of a top plate of an overhead damping chamber isolator;
FIG. 2 is a cross-sectional view of the overhead damping chamber isolator taken along the line A-A of FIG. 1;
the damping device comprises a cylinder wall 1, a top plate 2, a thimble 3, a locknut 4, a seal ring 5, a compression spring 6, a damping agent 7, a mounting nut 8, a pressing nut 9, a sensor 10, an intermediate shaft 11, a damping chamber 12, a base plate 13, a base 14, a boss 15, a shaft seat 16, a positioning hole 17, a stepped hole 18, a stepped hole 19, a mounting bolt hole 20, a central hole 21 and a through hole 22.
Detailed Description
The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, which are not intended to limit the scope of the invention as described herein.
As shown in fig. 2, for the utility model provides a top damping chamber vibration isolator, including spring footstock, boss 15, axle bed 16, damping cylinder, jackshaft 11, lock nut 4, compression spring 6, damping agent 7, sealing washer 5 and detection device.
The damping cylinder comprises a cylinder wall 1 and a base 14, the cylinder wall 1 is fixedly connected with the base 14, the center position of the upper end face of the base 14 is fixedly connected with a shaft seat 16, and the cylinder wall 1, the base 14 and the shaft seat 16 can be integrally cast or connected in a welding mode; the center of the bottom of the base 14 is provided with a positioning hole for fixing the bottom of the upper damping chamber vibration isolator to prevent the vibration isolator from moving horizontally.
The spring top seat comprises a top plate 2, a bottom plate 13 and a damping chamber 12, the center position of the bottom plate 13 is connected with a boss 15, and a common central hole 21 is formed after the boss 15 and the bottom plate 13 are fixed; the top plate 2, the bottom plate 13 and the boss 15 can be integrally cast or connected by welding; as shown in figure 1, the top plate is triangular, three mounting bolt holes 20 uniformly arranged along the triangular direction are arranged, the distance between each bolt hole and the centroid of the top plate is the same, the stress is uniform, the fixing is facilitated, and the circumferential rotation of the top plate 2 can be prevented.
A step hole 18 is formed in the center of the top plate 2 and used for installing a detection device; the bottom plate 13 is connected with the upper end of the inner wall of the cylinder wall 1, the sealing ring 5 is arranged at the joint for sealing, the bottom plate 13 is provided with a circle of annular groove, the sealing ring 5 can be effectively fixed, the sealing ring is prevented from falling off, and the sealing effect is ensured.
The upper end of the intermediate shaft 11 penetrates through the central hole 21 and is fixed in the damping chamber 12 through the locking nut 4, the top of the intermediate shaft is provided with a thimble 3, and the intermediate shaft 11 is in clearance fit with the central hole 21; the other end is fixedly connected with the shaft seat 16, and can be in threaded connection or welded connection; the intermediate shaft 11 is connected with the shaft seat 16 and the bottom plate 13, and under the natural state, the contact surface of the spring top seat and the damping cylinder is ensured not to be separated under the action of the compression spring 6, and meanwhile, the structural strength can be enhanced.
The compression spring 6 and the damping agent 7 are located between the base plate 13 and the base 14, the compression spring 6 is sleeved on the boss 15 and the shaft seat 16, radial displacement of the compression spring 6 is limited, the compression spring 6 is kept in a vertical state, and the overall bearing capacity of the system is improved.
The damping agent 7 is filled in the spring cavity between the bottom plate 13 and the base 14, and can flow upwards into the damping chamber 12 through the gap between the intermediate shaft 11 and the central hole 21 in a compressed state, so that the pressure on the whole structure caused by the net volume reduction of the spring cavity where the compression spring 6 is positioned in the compressed state is relieved, the structure bearing capacity is improved, and volume compensation is provided; meanwhile, the damping agent 7 can absorb the vibration energy of the compression spring 6, so that the overall vibration of the vibration isolator is reduced, the service life of the compression spring 6 is prolonged, and the vibration isolation effect is good; the damping agent 7 can flow back into the spring cavity between the base plate 13 and the base 14 without being forced.
The detection device comprises a mounting nut 8, a compression nut 9 and a sensor 10; the mounting nut 8 is in threaded connection with the stepped hole 18, the mounting nut 8 is provided with a through hole 22, the through hole 22 comprises two concentric holes with different inner diameters, the hole with the larger inner diameter is positioned at the upper part of the mounting nut 8 and is provided with an internal thread, and the mounting nut is connected with the compression nut 9; the sensor 10 is fixed inside the through hole by a compression nut 9; the diameter of the thimble 3 is smaller than the minimum diameter of the through hole 22, the thimble can axially move in the through hole 22, the distance between the top end of the thimble 3 and the sensor 10 is larger than the sum of the descending distance of the spring top seat and the sensing distance of the sensor when the overhead damping chamber vibration isolator normally works, and the working state of the overhead damping chamber vibration isolator is convenient to detect.
The distance from the side surface of the bottom plate 13 to the top end of the cylinder wall 1 is greater than the distance from the top end of the thimble 3 to the sensor 10; the distance between the bottom of the bottom plate 13 and the step 19 is larger than the distance between the side surface of the bottom plate 13 and the top end of the cylinder wall 1.
When the overhead damping chamber vibration isolator provided by the utility model is stressed, the spring footstock integrally moves downwards to extrude the compression spring 6 and the damping agent 7, the net volume of the spring cavity is reduced, the damping agent 7 has a certain blocking effect on the movement of the compression spring 6, partial vibration energy is absorbed, and the vibration amplitude of the compression spring 6 is reduced; the volume of the spring cavity where the compression spring 6 is located is reduced, the damping agent 7 flows upwards to the damping chamber 12 along the fit clearance between the intermediate shaft 11 and the central hole 21 under the action of pressure, when the external pressure is reduced, the damping agent 7 flows back to the spring cavity in the original path, and the damping chamber 12 can relieve the pressure formed by junction due to the reduction of the net volume of the spring cavity.
The distance between the thimble 3 and the sensor 10 is reduced because the spring top seat moves downwards, and the distance between the top of the thimble 3 and the sensor 10 is larger than the sensing distance of the sensor 10 when the compression spring 6 works normally, so that the upper damping chamber vibration isolator works normally; when the compression spring 6 fails, the distance between the top of the thimble 3 and the sensor 10 is smaller than the sensing distance of the sensor 10, and the outside receives a signal, so that the failure of the vibration isolator is judged.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. The utility model provides an overhead damping room isolator which characterized in that: the damping device comprises a spring top seat, a boss (15), a shaft seat (16), a damping cylinder, an intermediate shaft (11), a locking nut (4), a compression spring (6), a damping agent (7), a sealing ring (5) and a detection device; the spring top seat is arranged above the damping cylinder; a compression spring (6) and a damping agent (7) are arranged in a spring cavity formed between the spring top seat and the damping cylinder;
the damping cylinder comprises a cylinder wall (1) and a base (14); the cylinder wall (1) is fixedly connected with the base (14), the upper part of the cylinder wall is provided with a step (19), and the center of the upper end surface of the base (14) is fixedly connected with the shaft seat (16);
the spring top seat comprises a top plate (2), a damping chamber (12) and a bottom plate (13); the top plate (2) is fixedly connected with the bottom plate (13), a damping chamber (12) is formed in the middle, and a step hole (18) is formed in the center of the top plate (2); the center of the bottom plate (13) is fixedly connected with the boss (15), the bottom plate (13) and the boss (15) are provided with a central hole (21), and the side surface of the bottom plate (13) is matched and connected with the inner side surface of the cylinder wall (1);
the compression spring (6) is positioned between the bottom plate (13) and the base (14) and sleeved on the boss (15) and the shaft seat (16), and the damping agent (7) is filled in a spring cavity between the bottom plate (13) and the base (14);
the middle shaft (11) is connected with the shaft seat (16) and the bottom plate (13), the upper end of the middle shaft (11) is provided with a thimble (3), and the thimble (3) is positioned in the damping chamber;
the detection device comprises a sensor (10), a compression nut (9) and a mounting nut (8), the mounting nut (8) is fixed in a step hole (18), a through hole (22) is formed in the center of the mounting nut (8), the through hole (22) is a step hole, a hole with a large diameter is located in the upper portion of the through hole (22), threads are arranged on the side face of the upper portion of the through hole (22), the sensor (10) is fixed above the step of the through hole (22) through the compression nut (9), the top of the ejector pin (3) is located in the through hole (22), and the ejector pin and the sensor (10) are located in the vertical direction.
2. The overhead damping chamber vibration isolator of claim 1 wherein: the distance between the side surface of the bottom plate (13) and the top end of the cylinder wall (1) is greater than the distance between the thimble (3) and the sensor (10).
3. The overhead damping chamber vibration isolator of claim 1 wherein: the distance between the top end of the ejector pin (3) and the sensor (10) is larger than the sum of the compression amount of the vibration isolator in the working state and the sensing distance of the sensor (10).
4. The overhead damping chamber vibration isolator of claim 1 wherein: one end of the intermediate shaft (11) is fixedly connected with the shaft seat (16), the other end of the intermediate shaft penetrates through the central hole (21), and the intermediate shaft is fixed in the damping chamber (12) by using a locking nut (4) and a bottom plate (13).
5. The overhead damping chamber vibration isolator of claim 4 wherein: the intermediate shaft (11) and the central hole (21) are in clearance fit.
6. The overhead damping chamber vibration isolator of claim 1 wherein: the compression spring (6) is sleeved between the shaft seat (16) and the boss (15).
7. The overhead damping chamber vibration isolator of claim 1 wherein: the top plate (2) is provided with three mounting bolt holes (20) which are uniformly arranged in the circumferential direction.
8. The overhead damping chamber vibration isolator of claim 1 wherein: the bottom end of the base (14) is provided with a positioning hole (17).
9. The overhead damping chamber vibration isolator of claim 1 wherein: the top plate (2), the bottom plate (13) and the boss (15) can be integrally cast or connected by welding.
10. The overhead damping chamber vibration isolator of claim 1 wherein: the cylinder wall (1), the base (14) and the shaft seat (16) can be integrally cast or connected in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021223057.5U CN213013719U (en) | 2020-06-29 | 2020-06-29 | Overhead damping chamber vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021223057.5U CN213013719U (en) | 2020-06-29 | 2020-06-29 | Overhead damping chamber vibration isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213013719U true CN213013719U (en) | 2021-04-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021223057.5U Active CN213013719U (en) | 2020-06-29 | 2020-06-29 | Overhead damping chamber vibration isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213013719U (en) |
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2020
- 2020-06-29 CN CN202021223057.5U patent/CN213013719U/en active Active
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