A fault indicating vibration isolator

Abstract

The invention discloses a fault indicating vibration isolator in the field of rail transit, comprising a base and a bearing platform, the top of the base can be elastically deformed, the top surface of the base is closed by the bearing platform, a spiral steel spring is arranged in the base and filled with damping agent; a through hole with a small diameter at the top and a large diameter at the bottom is arranged at the center of the bearing platform; the top of the through hole is closed by an indicating plate; a screw is inserted at the bottom of the through hole, and the bottom of the screw is connected to a hollow damping tube; the ejector comprises an ejector body and an ejector limiting mechanism; the ejector limiting mechanism and the ejector body are cross-arranged, the tip of the ejector body penetrates the damping tube and the screw upward, and a gap is left between the ejector body and the indicating plate; the ejector limiting mechanism respectively passes through two limiting holes on the damping tube, and the damping tube is sleeved with a locking nut located below the ejector limiting mechanism; the screw and the damping tube are sleeved with a constraint spring located below the bearing platform and above the ejector limiting mechanism.

Description

Technical Field

[0001] The invention relates to a fault indicating vibration isolator in the field of rail transportation. Background Art

[0002] According to relevant regulations, the service life of the floating plate of the subway track is more than 50 years, and the service life of the steel spring damping isolator must reach more than 30 years. However, during the service life of all isolators, it is inevitable that some isolators will have failures such as steel spring breakage during their service life. At present, there is no isolator with a real fault indication function. Since the isolator is installed in the floating plate, this built-in structure makes it very difficult for the staff to perform daily performance inspections on the isolator. In addition, once the isolator spring breaks, the isolator will completely lose the function of supporting the floating plate, which is also very detrimental to the safety of train operation. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a fault indicating vibration isolator which not only has the advantages of high strength, stable vibration reduction performance and long service life, but also has the characteristics of fault indication and fault hazard limitation.

[0004] A technical solution to achieve the above object is: a fault indicating vibration isolator, comprising a base and a bearing platform, the top of the base can be elastically deformed, the top surface of the base is closed by the bearing platform, a spiral steel spring is arranged in the base and is filled with a damping agent;

[0005] A through hole with a smaller diameter at the top and larger diameter at the bottom is provided at the center of the support platform; the top of the through hole is closed by an indicator sheet; a screw is inserted into the bottom of the through hole, and the bottom of the screw is connected to a hollow damping tube;

[0006] The ejector includes an ejector body and an ejector limiting mechanism; the ejector limiting mechanism and the ejector body are arranged crosswise, the tip of the ejector body penetrates the damping tube and the screw rod upwards, and a gap is left between the ejector body and the indicator sheet;

[0007] The ejector pin limiting mechanism respectively passes through two limiting holes on the damping tube, and a locking nut located below the ejector pin limiting mechanism is sleeved on the damping tube;

[0008] The screw rod and the damping tube are sleeved with a restraining spring located below the support platform and above the ejector pin limiting mechanism.

[0009] Furthermore, a damping disk is sleeved on the bottom end of the damping tube, and the base includes a base body and a piston chamber cylinder, and a support platform is correspondingly provided on the top surface of the base body.

[0010] Furthermore, the top surface and the bottom surface of the damping plate are respectively provided with an upper groove and a lower groove.

[0011] Furthermore, the support platform includes a support platform body, a boss is provided at the center of the bottom surface of the support platform body, and the restraint spring is located under the support platform and above the ejector pin limiting mechanism.

[0012] Furthermore, an outer step surface is provided on the top of the piston chamber cylinder, a rubber sealing ring is fixed on the outer step surface, and a stainless steel hoop is wrapped around the outer circumference of the top and bottom of the rubber sealing ring.

[0013] Furthermore, an upper collar is provided on the inner circumference of the top of the rubber sealing ring and is welded and fixed to the bottom surface of the support platform, and the inner diameter of the upper collar is equal to the inner diameter of the spring chamber cylinder.

[0014] A technical solution of a fault-indicating vibration isolator of the present invention is adopted, comprising a base and a support, the top of the base is elastically deformable, the top surface of the base is closed by the support, a spiral steel spring is arranged in the base and filled with damping agent; a through hole with a small diameter at the top and a large diameter at the bottom is arranged at the center of the support; the top of the through hole is closed by an indicating plate; a screw is inserted into the bottom of the through hole, and the bottom of the screw is connected to a hollow damping tube; the ejector comprises an ejector body and an ejector limiting mechanism; the ejector limiting mechanism and the ejector body are cross-arranged, the tip of the ejector body passes through the damping tube and the screw upward, and a gap is left between the ejector body and the indicating plate; the ejector limiting mechanism respectively passes through two limiting holes on the damping tube, and the damping tube is sleeved with a locking nut located below the ejector limiting mechanism; the screw and the damping tube are sleeved with a constraint spring located below the support and above the ejector limiting mechanism. Its technical effects are: reasonable structure, high strength, good performance; the fatigue life of the vibration isolator reaches more than 8 million times. It has good vibration isolation effect, the ground vibration can be attenuated by more than 20dB, and the service life is designed according to 50 years. It eliminates the problem of large shaking of the carriage when the existing train passes through the floating plate vibration reduction section; it solves the problem of rail corrugation and other faults in the floating plate vibration reduction track line section. At the same time, it has a spiral steel spring failure indication function. This function is that when the spiral steel spring breaks or weakens, the constraint spring will be compressed, the support platform will drop, and the ejector will pierce the indicator plate 2, thereby notifying the inspector that there is a fault defect inside the vibration isolator and the vibration isolator needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a fault indicating vibration isolator of the present invention.

[0016] Figure 2 The figure is a schematic diagram of the appearance of a fault indicating vibration isolator of the present invention. DETAILED DESCRIPTION

[0017] See also Figure 1 In order to better understand the technical solution of the present invention, the inventor of the present invention will explain in detail through specific embodiments and in conjunction with the accompanying drawings:

[0018] See also Figure 1 A fault indicating vibration isolator of the present invention comprises a base 9, a support 8, a spiral steel spring 1, a screw rod 3, a restraining spring 6 and a thimble 5.

[0019] The base 9 includes a base body 91, a spring chamber cylinder 92 and a support platform 93. The spring chamber cylinder 92 is welded to the outer circumference of the top surface of the base body 91, and the support platform 93 is welded to the center of the top surface of the base body 91.

[0020] The top of the spring chamber cylinder 92 is provided with an outer step surface, on which a rubber seal ring 94 is fixed, and a stainless steel hoop 95 is wound around the outer circumference of the bottom of the rubber seal ring 94 to fix the rubber seal ring 94 to the outer step surface, and a stainless steel hoop 95 is also wound around the top of the rubber seal ring 94. This design ensures that the top of the piston chamber cylinder 92 is elastically deformable.

[0021] The top of the rubber seal ring 94 is closed by the support 8. The support 8 includes a support body 81 and a boss 82 located at the center of the bottom surface of the support 81. An upper collar 96 is welded on the outer periphery of the bottom surface of the support body 81. The outer circumference of the upper collar 96 contacts the inner circumference of the rubber seal ring 94, and the inner diameter of the upper collar 96 is equal to the inner diameter of the spring chamber cylinder 92. The purpose of this design is to enhance the rigidity of the top of the rubber seal ring 94.

[0022] Thus, a spring chamber is formed radially inside the spring chamber cylinder 92 of the base 9, and a helical steel spring 1 is arranged in the spring chamber, which is in line contact with the inner circumference of the upper collar 96 and the inner circumference of the spring chamber cylinder 92. The spring chamber is filled with a damping agent.

[0023] In this embodiment, the spring wire diameter of the spiral steel spring 1 is 42mm, the free height is 180±2mm, and the spring middle diameter is Φ129.5±1mm. The thickness of the support body 81 is 25mm, the thickness of the base body 91 is 20mm, and the spring chamber cylinder 92 is a seamless steel pipe with a wall thickness of 10mm.

[0024] A through hole 83 with a smaller diameter at the top and larger diameter at the bottom is provided at the center of the top surface of the support body 81, and the top surface of the through hole 83 is closed by the indicator sheet 2. A screw rod 3 is inserted at the bottom of the through hole 83, and the bottom of the screw rod 3 is connected to a hollow damping tube 4.

[0025] The ejector pin 5 includes an ejector pin body 51 and an ejector pin stopper mechanism 52. The ejector pin stopper mechanism 52 is arranged in a cross pattern with the ejector pin body 51 in the middle of the ejector pin body 51. A gap of 2 mm is left between the bottom of the ejector pin body 51 and the top surface of the support platform 93, and the tip of the ejector pin body 51 penetrates the damping tube 4 and the screw rod 3 upward, leaving a gap of 11.5 mm between the tip and the indicator sheet 2.

[0026] The ejector stopper mechanism 52 respectively passes through the two stopper holes on the damping tube 4, and the damping tube 4 is sleeved with a jacking nut 41 located below the ejector stopper mechanism 52. The screw rod 3 and the damping tube 4 are sleeved with a restraining spring 6 located below the boss 82 of the support 8 and above the ejector stopper mechanism 52 of the ejector 5. The total length of the restraining spring 6 is 35 mm, of which the length of the portion sleeved with the damping tube 4 is 15 mm.

[0027] The damping plate 7 is sleeved on the bottom end of the damping tube 4 . An upper groove 71 is provided on the top surface of the damping plate 7 , and a lower groove 72 is provided on the bottom surface of the damping plate 7 .

[0028] A fault indicating vibration isolator of the present invention has the following characteristics:

[0029] It has the function of indicating the failure of the spiral steel spring 1. When the spiral steel spring 1 breaks or weakens, the restraint spring 6 will be compressed, the support platform 8 will drop, and the ejector pin 5 will pierce the indicator sheet 2, thereby notifying the inspector that there is a fault defect inside the vibration isolator and the vibration isolator needs to be replaced.

[0030] When the spiral steel spring 1 is broken or weakened, the lower groove 72 of the damping plate 7 will be seated on the supporting platform 93, so that the supporting platform 8 will not completely lose the function of supporting the floating plate, which will endanger the safety of train operation.

[0031] The fault-indicating vibration isolator of the present invention has a reasonable structure, high strength and good performance; the fatigue life of the vibration isolator reaches more than 8 million times. It has a good vibration isolation effect, and the ground vibration can be attenuated by more than 20dB. The service life is designed according to 50 years, which eliminates the problem of large shaking of the carriage when the existing train passes through the floating plate vibration reduction section; and solves the problem of rail corrugation and other faults in the floating plate vibration reduction track line section.

[0032] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A fault indicating vibration isolator, comprising a base and a support, wherein the top of the base is elastically deformable, the top surface of the base is closed by the support, a spiral steel spring is arranged inside the base and is filled with a damping agent, and is characterized in that: A through hole with a smaller diameter at the top and larger diameter at the bottom is provided at the center of the support platform; the top of the through hole is closed by an indicator sheet; a screw is inserted into the bottom of the through hole, and the bottom of the screw is connected to a hollow damping tube; The ejector includes an ejector body and an ejector stopper mechanism; the ejector stopper mechanism and the ejector body are arranged crosswise, the tip of the ejector body penetrates the damping tube and the screw rod upwards, and a gap is left between the ejector body and the indicator sheet; The ejector pin limiting mechanism respectively passes through two limiting holes on the damping tube, and a locking nut located below the ejector pin limiting mechanism is sleeved on the damping tube; The screw rod and the damping tube are sleeved with a restraining spring located below the support platform and above the ejector pin limiting mechanism.

2. A fault indicating vibration isolator according to claim 1, characterized in that: The bottom end of the damping tube is sleeved with a damping disk, the base comprises a base body and a spring chamber cylinder, and a support platform is correspondingly provided on the top surface of the base body.

3. A fault indicating vibration isolator according to claim 2, characterized in that: The top surface and the bottom surface of the damping plate are correspondingly provided with an upper groove and a lower groove.

4. A fault indicating vibration isolator according to claim 2, characterized in that: The support platform comprises a support platform body, a boss is arranged at the center of the bottom surface of the support platform body, the restraining spring is located under the support platform and above the ejector pin limiting mechanism.

5. A fault indicating vibration isolator according to claim 2, characterized in that: The top of the spring chamber cylinder is provided with an outer step surface, a rubber sealing ring is fixed on the outer step surface, and stainless steel hoops are wound around the outer circumference of the top and bottom of the rubber sealing ring.

6. A fault indicating vibration isolator according to claim 5, characterized in that: An upper collar is provided on the inner circumference of the top of the rubber sealing ring and is welded and fixed to the bottom surface of the support platform. The inner diameter of the upper collar is equal to the inner diameter of the spring chamber cylinder.

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