Stepless adjustment spring vibration isolator

Abstract

The utility model discloses a stepless adjusting spring vibration isolator, which relates to the field of urban rail transit, and comprises a base, an upper cover, an elastic body positioned between the base and the upper cover, and a screw cap in threaded fit with the upper cover, a plurality of lap joint lugs are arranged on the screw cap, and an adjusting counter bore is arranged at the top of the upper cover. The problems that in the prior art, due to the fact that multiple layers of height adjusting gaskets are adopted, the height adjusting precision is low, the technology is complex, and an outer sleeve needs to be replaced or assembling links need to be added through modification of a thread pair or an adapter are solved, and the purpose that the height adjusting precision is high under the conditions that the structure of an existing outer sleeve is not changed and the adapter does not need to be additionally arranged is achieved. Stepless continuous adjustment of the height of the floating slab track is completed through the self-adjusting structure of the vibration isolator body, so that the risk of uneven supporting caused by deterioration of a height adjusting gasket is eliminated, and the purposes of improving the long-term service stability and the driving safety of the track structure are achieved.

Description

Technical Field

[0001] The utility model relates to the field of urban rail transit, in particular to a stepless adjustment spring vibration isolator. Background Art

[0002] As an important part of the modern urban transportation system, urban rail transit plays an important role in alleviating urban traffic congestion, improving urban operation efficiency, promoting regional economic development, and achieving green and low-carbon travel. Since urban rail transit needs to pass through densely populated areas, it has high requirements for track vibration and noise reduction.

[0003] As a special type of vibration-reducing track, steel spring floating plate track has been widely used. The steel spring floating plate track is a track that sets a vibration isolator with a specific stiffness between the integral roadbed and the lower foundation of the roadbed, so that the roadbed is separated from the foundation structure, forming a "mass-spring" vibration isolation system, thereby isolating or reducing the impact of vibration transmitted from the track to the surroundings. Therefore, the steel spring isolator is an important vibration reduction component of the floating plate track, and the steel spring inside it acts as an elastic element to achieve the effect of vibration reduction and sound insulation.

[0004] The steel spring isolators on existing operating lines usually consist of two parts: an outer sleeve and an isolator. Generally, multi-layer height adjustment gaskets are used at the connection between the outer sleeve and the isolator to achieve the height adjustment function. However, this height adjustment process has many problems: on the one hand, the height adjustment process is complicated and cannot achieve continuous adjustment; on the other hand, during long-term operation, the quality of the height adjustment gaskets will deteriorate and the service performance will decrease, thereby reducing the height adjustment accuracy, resulting in uneven track support status, and further affecting the safety and stability of driving.

[0005] In the prior art, there are two main types of technologies that can achieve stepless continuous adjustment. The first type is to achieve stepless continuous adjustment by setting an internal thread on the outer sleeve and an external thread on the isolator, and using the interaction between the internal and external thread pairs. However, this method requires replacing the outer sleeve of the isolator on the existing operating line. However, the number of isolators in the vibration reduction section of the existing operating line is huge, and the outer sleeve of the isolator is cast together with the concrete and is solidified in the floating plate, making it difficult to remove and replace. The second type of technology is to use a special adapter to connect the outer sleeve and the isolator through the adapter, thereby achieving a stepless continuous adjustment function. However, adding an adapter will increase the complexity of the construction process to a certain extent. Therefore, it is necessary to carry out research on a new type of isolator to achieve a stepless adjustment function for the floating plate track height without changing the existing outer sleeve structure and without adding additional adapters. Utility Model Content

[0006] The utility model provides a stepless adjustment steel spring isolator to solve the problems in the prior art of low height adjustment precision, complex process, and the need to replace the outer sleeve or increase assembly links through threaded pairs or adapters. The utility model realizes stepless and continuous adjustment of the height of the floating plate track through the self-adjusting structure of the isolator body without changing the existing outer sleeve structure and without adding adapters, thereby eliminating the risk of uneven support caused by deterioration of the height adjustment gaskets and improving the long-term service stability of the track structure and driving safety.

[0007] The utility model is realized by the following technical solutions:

[0008] A stepless adjustment spring isolator comprises a base, an upper cover, an elastic body between the base and the upper cover, and a rotary cover threadedly matched with the upper cover, a plurality of overlapping ears are arranged on the rotary cover, and an adjustment countersunk hole is opened on the top of the upper cover.

[0009] In view of the problem that the continuously adjustable spring isolators in the prior art are not compatible with the floating plate tracks of urban rail transit built earlier, the utility model proposes a stepless adjustment spring isolator, wherein the base, upper cover and elastomer are all existing structures of the spring isolator, which will not be elaborated here. The vibration isolator of the present application includes a screw cover that can be threadedly connected to the upper cover, and a plurality of lap ears are arranged on the screw cover, and the number and distribution of the lap ears match the support plate structure on the existing outer sleeve, so that the vibration isolator of the present application can be installed in the outer sleeve. An adjustment countersunk hole is provided on the top of the upper cover, so that after the vibration isolator is installed in place, the rotation of the upper cover can be controlled by a tool matching the adjustment countersunk hole. The adjustment countersunk hole can be realized by any countersunk hole structure that can drive the upper cover to rotate, such as a square hole, a hexagonal countersunk hole, etc.

[0010] During specific use, the lap ears in the vibration isolator of the present application are aligned with the gap of the support plate of the existing outer sleeve, and the vibration isolator of the present application is installed inside the existing outer sleeve until the base is located on the foundation. At this time, the rotary cover is located below the lower support plate of the outer sleeve, and the vibration isolator of the present application is rotated until the lap ears abut against the stop block of the inner wall of the existing outer sleeve in the circumferential direction; at this time, under the pushing action of the elastic body, the top surface of the lap ears abuts against the bottom surface of the lower support plate of the outer sleeve. When the height of the vibration isolator needs to be adjusted, the upper cover is driven to rotate by a tool matching the adjustment countersunk hole, and a spiral relative motion occurs between the upper cover and the rotary cover, so that the height adjustment of the floating plate can be realized, and then the stepless adjustment of the height of the vibration isolator can be realized.

[0011] It can be seen that the present application abandons the technical idea that a spring isolator with a continuous adjustment function in the prior art needs to use a special adapter, and instead realizes the continuous adjustment function by optimizing the structure of the isolator itself. The upper cover and the rotary cover in the present application are both components that make up the isolator; the present application can achieve compatibility and optimization of the existing floating plate track of urban rail transit without changing the existing outer sleeve structure of the isolator and without destroying the existing floating plate structure, significantly improving the efficiency of the transformation of the vibration reduction section of the existing operating line, and significantly reducing the cost of the transformation and subsequent maintenance of the vibration reduction section of the existing operating line. The present application completes the stepless and continuous adjustment of the height of the floating plate track through the self-adjusting structure of the isolator body, overcomes the risk of uneven support caused by the deterioration of the height adjustment gasket, and improves the long-term service stability of the track structure and driving safety.

[0012] Furthermore, the outer wall of the upper cover is provided with an external thread, and the inner wall of the screw cap is provided with an internal thread matching the external thread; the screw cap is sleeved outside the upper cover. This solution clearly defines the threaded connection between the screw cap and the upper cover; the adjustment stroke of the vibration isolator in this solution is determined by the matching length between the internal thread and the external thread.

[0013] Furthermore, the upper cover includes a reduced diameter portion and a main body portion which are distributed on the upper and lower parts, the outer diameter of the reduced diameter portion is smaller than the outer diameter of the main body portion, and the external thread is arranged on the reduced diameter portion.

[0014] In this solution, the reduced diameter portion is located above the main body, and the main body realizes the cooperation with the elastic body and the base below, and the reduced diameter portion realizes the threaded connection with the screw cap. Among them, the reduced diameter portion has a smaller outer diameter than the main body, which can increase the thickness of the corresponding screw cap while keeping the original external dimensions of the isolator unchanged, thereby increasing the overall structural strength of the adjustment part of the isolator, which is beneficial to prolonging the service life of the isolator of this application. In addition, since this solution can keep the original external dimensions of the isolator unchanged, it can better adapt to the existing outer sleeve, and further ensure the compatibility with the outer sleeve of the isolator in the existing operating lines.

[0015] Furthermore, there are three overlapping ears in total, and the three overlapping ears are evenly distributed in a circumferential direction on the outer wall of the rotary cover, which is also conducive to ensuring the compatibility with the outer sleeve of the vibration isolator in the existing operating lines.

[0016] Furthermore, a positioning hole is provided on the lap ear, and the axis of the positioning hole is parallel to the axis of the screw cap. Those skilled in the art should understand that the outer sleeve of the existing vibration isolator generally has an upper and lower support plate structure, and threaded holes for positioning connection are provided on the lower support plate of some outer sleeves. Therefore, the present solution provides positioning holes on the lap ear, so that the provided positioning holes correspond one-to-one with the threaded holes on the corresponding outer sleeve, so as to achieve the matching of the present application with the outer sleeve with threaded holes, and the relatively stable connection between the screw cap and the outer sleeve, thereby ensuring the stability of the screw cap during the height adjustment process.

[0017] Furthermore, the inner wall of the adjustment counterbore is provided with a locking hole that passes through the side wall of the upper cover, and also includes a locking pin that matches the locking hole. The locking hole in this solution radially passes through the side wall of the upper cover. When the vibration isolator is adjusted into place, the locking pin is inserted from the inside to the outside into the corresponding locking hole, so that the end of the locking pin abuts against the inner wall of the rotary cover to achieve temporary locking, thereby reducing the risk of mutual displacement between the rotary cover and the upper cover when the train passes.

[0018] Furthermore, a limiting hole is provided at the bottom of the base, and a limiting member matching the limiting hole is included, and the limiting member is used to be partially embedded in the foundation.

[0019] In this solution, a limiting part is embedded in the foundation, and a limiting hole matching the limiting part is opened at the bottom of the base; the part where the limiting part matches the limiting hole must be exposed to the upper part of the foundation. When the base of the vibration isolator of this application is in place, the limiting hole is matched with the embedded limiting part, which is beneficial to reduce the installation difficulty of the vibration isolator, improve the installation efficiency, and ensure that the vibration isolator is installed in the correct position.

[0020] Furthermore, the base is provided with a fixing bolt, the elastic body is sleeved outside the fixing bolt, and also includes a fixing nut matching the fixing bolt. The fixing nut and the fixing bolt are used in combination to achieve the connection between the upper cover, the elastic body and the base.

[0021] Furthermore, the top of the fixing bolt is located in the adjusting countersunk hole, and the fixing nut is installed on the top of the fixing bolt. In this solution, the fixing bolt is inserted into the adjusting countersunk hole, and the fixing nut is also located in the adjusting countersunk hole, which is convenient for tightening the fixing nut in the self-adjusting countersunk hole.

[0022] Furthermore, it also includes a protective cover fixedly mounted between the base and the upper cover; those skilled in the art should understand that the protective cover in this solution is a flexible structure.

[0023] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0024] 1. The utility model abandons the technical idea that the spring isolator with continuous adjustment function in the prior art needs to use a special adapter, and realizes the continuous adjustment function by optimizing the structure of the isolator itself, overcoming the risk of uneven support caused by deterioration of the height adjustment gasket, and improving the long-term service stability of the track structure and driving safety.

[0025] 2. The utility model can achieve compatibility and optimization of the existing urban rail transit floating plate track without changing the existing isolator outer sleeve structure and without destroying the existing floating plate structure, which significantly improves the transformation efficiency of the existing operating line vibration reduction section and significantly reduces the transformation and subsequent maintenance costs of the existing operating line vibration reduction section.

[0026] 3. The utility model can increase the thickness of the corresponding screw cover while keeping the original external dimensions of the vibration isolator unchanged, thereby increasing the overall structural strength of the adjustment part of the vibration isolator, which is beneficial to prolonging the service life of the vibration isolator of the present application; and can better adapt to the existing outer sleeve.

[0027] 4. The utility model can achieve temporary locking through the locking pin, thereby reducing the risk of mutual displacement between the rotary cover and the upper cover when the train passes.

[0028] 5. The utility model is conducive to reducing the installation difficulty of the vibration isolator, improving the installation efficiency, and ensuring that the vibration isolator is installed in the correct position. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0030] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0031] Figure 2 It is a cross-sectional view of a specific embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the structure of a specific embodiment of the utility model installed in an outer sleeve;

[0033] Figure 4 This is a cross-sectional view of a specific embodiment of the utility model installed in an outer sleeve;

[0034] Figure 5 It is an exploded schematic diagram of a specific embodiment of the utility model;

[0035] Figure 6 It is a schematic diagram of the working state of a specific embodiment of the utility model.

[0036] Marks and corresponding parts names in the attached drawings:

[0037] 1-outer sleeve, 2-screw cover, 201-lap ear, 202-positioning hole, 3-fixing nut, 4-upper cover, 401-adjusting countersunk hole, 402-locking hole, 403-reduced diameter part, 404-main body, 5-locking pin, 6-elastic body, 7-protective cover, 8-fixing bolt, 9-base, 10-limiting piece, 11-limiting hole, 12-foundation, 13-stop block, 14-support plate, 15-floating plate. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is further described in detail in combination with the embodiments and the accompanying drawings. The schematic implementation mode of the utility model and its description are only used to explain the utility model and are not used as a limitation of the utility model. In the description of the present application, it should be understood that the orientation or position relationship indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0039] Example 1

[0040] like Figure 1 and Figure 2 The stepless spring isolator shown comprises a base 9, an upper cover 4, an elastic body 6 located between the base 9 and the upper cover 4, and a screw cap 2 threadedly matched with the upper cover 4, a plurality of lap ears 201 are arranged on the screw cap 2, and an adjustment countersunk hole 401 is arranged on the top of the upper cover 4. The outer wall of the upper cover 4 is provided with an external thread, and the inner wall of the screw cap 2 is provided with an internal thread matching the external thread; the screw cap 2 is sleeved on the outer side of the upper cover 4 by threads.

[0041] The elastic body 6 in this embodiment is a steel spring.

[0042] In this embodiment, the adjusting counterbore 401 is a hexagonal counterbore, and the corresponding rotating tool is a hexagonal wrench.

[0043] In addition, the base 9 of this embodiment is provided with a fixing bolt 8, the elastic body 6 is sleeved outside the fixing bolt 8, and also includes a fixing nut 3 matching the fixing bolt 8. The top of the fixing bolt 8 is located in the adjusting countersunk hole 401, and the fixing nut 3 is installed on the top of the fixing bolt 8.

[0044] This embodiment further comprises a protective sleeve 7 fixedly mounted between the base 9 and the upper cover 4, preferably a rubber sleeve.

[0045] This embodiment can be adapted to be used with the outer sleeve 1 of the existing vibration isolator, and the structure after being matched with the outer sleeve 1 is as follows Figures 3 to 5 The outer sleeve 1 has a support plate 14 and a plurality of stop blocks 13 located below the support plate 14. The outer sleeve 1 is pre-buried in the floating plate 15.

[0046] When it is necessary to replace the steel spring isolator in the existing operating line with the isolator of the present application, it is only necessary to take out the original isolator from the outer sleeve 1 and then install the isolator of the present application into the outer sleeve 1 .

[0047] When installing this embodiment, the lap ear 201 is aligned with the gap between the support plates of the existing outer sleeve 1, and the vibration isolator of the present application is installed inside the existing outer sleeve 1 until the base 9 is located on the foundation 12. At this time, the screw cap is located below the support plate 14 of the outer sleeve, and the vibration isolator is rotated as a whole until the lap ear 201 abuts against the stop block 13 on the inner wall of the outer sleeve 1 in the circumferential direction; at this time, under the pushing action of the elastic body 6, the top surface of the lap ear 201 abuts against the bottom surface of the support plate 14 of the outer sleeve 1; at this time, the state is as follows: Figure 6 shown.

[0048] When the height of the vibration isolator needs to be adjusted, the upper cover is driven to rotate by a rotating tool matched with the adjusting countersunk hole 401, so that a spiral relative motion occurs between the upper cover 4 and the rotating cover 2, thereby adjusting the height of the floating plate and further achieving stepless adjustment of the height of the vibration isolator.

[0049] In a more preferred embodiment, there are three overlapping ears 201 in total, and the three overlapping ears 201 are evenly distributed in a circumferential direction on the outer wall of the rotary cover 2 to facilitate matching with the layout of the support plate 14 of the existing outer sleeve 1.

[0050] Example 2

[0051] A stepless spring isolator, based on embodiment 1, as Figure 2 As shown, the upper cover in this embodiment includes a reduced diameter portion 403 and a main body portion 404 distributed on the upper and lower sides. The outer diameter of the reduced diameter portion 403 is smaller than the outer diameter of the main body portion 404 , and an external thread is provided on the reduced diameter portion 403 .

[0052] Preferably, the outer diameter of the main body 404 may be equal to the outer diameter of the original vibration isolator in the existing operating line, so as to facilitate matching with the existing outer sleeve.

[0053] Example 3

[0054] A stepless spring isolator, based on any of the above embodiments, Figures 1 to 6 As shown, a positioning hole 202 is formed on the overlapping ear 201 , and the axis of the positioning hole 202 is parallel to the axis of the rotating cover 2 .

[0055] The positioning holes 202 in this embodiment correspond one-to-one to the threaded holes on the support plate of the existing outer sleeve 1 .

[0056] Example 4

[0057] A stepless spring isolator, based on any of the above embodiments, Figures 1 to 6 As shown, the inner wall of the adjusting counterbore 401 is provided with a locking hole 402 penetrating through the side wall of the upper cover 4 , and also includes a locking pin 5 matching the locking hole 402 .

[0058] When the vibration isolator is adjusted to the right position, the locking pin 5 is inserted from the inside to the outside into the corresponding locking hole 402 to reduce the risk of mutual displacement between the rotary cover 2 and the upper cover 4 when the train passes.

[0059] Example 5

[0060] A stepless spring isolator, based on any of the above embodiments, Figures 1 to 6 As shown, a limiting hole 11 is provided at the bottom of the base 9 , and the base 9 also includes a limiting member 10 matching the limiting hole 11 , and the limiting member 10 is partially embedded in the foundation 12 .

[0061] When installing the vibration isolator of this embodiment, the limiting hole 11 is assembled opposite to the embedded limiting member 10, which is helpful to reduce the installation difficulty of the vibration isolator, improve the installation efficiency, and ensure that the vibration isolator is installed at the designated position.

[0062] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

[0063] It should be noted that, in this document, terms such as "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this application can be directly connected or indirectly connected via other components without special explanation.

Claims

1. A stepless spring isolator, comprising a base (9), an upper cover (4), and an elastic body (6) located between the base (9) and the upper cover (4), characterized in that: It also comprises a screw cap (2) threadably matched with the upper cover (4), a plurality of overlapping ears (201) are arranged on the screw cap (2), and an adjusting countersunk hole (401) is arranged on the top of the upper cover (4).

2. The stepless adjustment spring isolator according to claim 1, characterized in that: The outer wall of the upper cover (4) is provided with an external thread, and the inner wall of the rotary cover (2) is provided with an internal thread matching the external thread; the rotary cover (2) is sleeved outside the upper cover (4).

3. The stepless adjustment spring isolator according to claim 2, characterized in that: The upper cover (4) comprises a reduced diameter portion (403) and a main body portion (404) which are arranged at the upper and lower parts, the outer diameter of the reduced diameter portion (403) being smaller than the outer diameter of the main body portion (404), and the external thread is arranged on the reduced diameter portion (403).

4. The stepless adjustment spring isolator according to claim 1, characterized in that: There are three lap ears (201) in total, and the three lap ears (201) are evenly distributed in a circular shape along the circumferential direction on the outer wall of the rotary cover (2).

5. The stepless adjustment spring isolator according to claim 1, characterized in that: A positioning hole (202) is provided on the overlapping ear (201), and the axis of the positioning hole (202) is parallel to the axis of the rotating cover (2).

6. The stepless adjustment spring isolator according to claim 1, characterized in that: The inner wall of the adjusting countersunk hole (401) is provided with a locking hole (402) penetrating through the side wall of the upper cover (4), and also includes a locking pin (5) matching the locking hole (402).

7. The stepless adjustment spring isolator according to claim 1, characterized in that: The base (9) has a limiting hole (11) at the bottom thereof, and also includes a limiting member (10) matching the limiting hole (11), wherein the limiting member (10) is used to be partially embedded in the foundation.

8. A stepless adjustment spring isolator according to any one of claims 1 to 7, characterized in that: The base (9) is provided with a fixing bolt (8), the elastic body (6) is sleeved outside the fixing bolt (8), and further comprises a fixing nut (3) matching the fixing bolt (8).

9. The stepless adjustment spring isolator according to claim 8, characterized in that: The top end of the fixing bolt (8) is located in the adjusting countersunk hole (401), and the fixing nut (3) is mounted on the top end of the fixing bolt (8).

10. A stepless adjustment spring isolator according to any one of claims 1 to 7, characterized in that: It also includes a protective sleeve (7) fixedly sleeved between the base (9) and the upper cover (4).

Images