Shoulder type damping fastener

Abstract

The utility model relates to the technical field of rail transit, and discloses a shoulder type vibration reduction fastener which comprises a lower base plate, an elastic cushion and an upper base plate. Transverse blocking shoulders are arranged at the two ends of the lower base plate, a transverse limiting face is arranged on the upper base plate, the transverse blocking shoulders and the transverse limiting face are limited through transverse check blocks, and the transverse check blocks and the transverse limiting face are in wedge-shaped face fit. At least one of the front side surface and the rear side surface at the junction of the transverse stop block and the transverse limiting surface is provided with the limiting hole, and the limiting column is mounted in the limiting hole; the wedge-shaped assembly mode of an original transverse check block is not changed, the moving position of the transverse check block can be limited only by arranging the limiting holes and the limiting columns, original machining equipment does not need to be changed, and the increased cost is not high on the basis of improving the effect on the whole; and the original advantage of reducing the matching precision is still kept.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, in particular to a shoulder-blocking vibration-damping fastener. Background Art

[0002] More and more urban rail transit lines are laid by elevated lines and ground lines, and more and more lines pass through residential areas and densely populated areas. In this way, while rail transit provides people with a fast and safe way of travel, the noise and vibration problems it generates also seriously affect the quality of life of surrounding residents and endanger the safety of buildings around the lines. In order to reduce the noise and vibration generated by rail transit operation, vibration reduction products such as floating ballast plates, rail dampers, and vibration reduction fasteners are often used in rail transit. Among them, vibration reduction fasteners have been widely used in rail transit construction due to their advantages such as relatively convenient maintenance, low construction cost, and good vibration and noise reduction effects. They have become one of the simplest and effective measures to reduce the impact of surrounding environmental safety and noise.

[0003] During the operation of the train, a certain lateral force will be generated between the wheel and the rail. Under the action of the lateral force, the rail will gradually deviate from the original position, resulting in an increase in the dynamic expansion of the track gauge of the track system and a decrease in the dynamic stability of the track system, which will have an adverse effect on the track system and normal driving. Therefore, the vibration-damping fastener system must also have a certain ability to resist lateral forces, ensure that its own structure has a certain lateral strength, and maintain the track gauge. At present, some types of vibration-damping fasteners have been launched on the market, which have achieved certain vibration-damping effects. Among them, the shoulder-type vibration-damping fastener has been widely used due to its superior vibration-damping performance and lateral limiting ability, as well as reasonable cost.

[0004] In the prior art, there are shoulder-type vibration damping fasteners. Usually, a transverse shoulder is set in the fastener system. The transverse shoulder is used to control the transverse displacement of the upper iron pad, thereby improving the transverse stiffness of the fastener, thereby better achieving the vibration reduction effect and improving the stability and safety of the track system. This design has achieved relatively good application results in practical applications. However, in the actual production process, shoulder-type vibration damping fasteners have the problem of high matching accuracy requirements and inconvenient production. For example, the matching between the upper pad, the transverse block and the lower pad is difficult. Since the fastener system relies on the transverse shoulder on the lower pad to match the transverse block with a certain elasticity to achieve the lateral positioning of the upper pad, the transverse matching accuracy between the upper pad, the transverse block and the lower pad is relatively high, and a certain interference fit is required. However, in actual production, the upper pad and the lower pad are produced by casting technology, and its accuracy is difficult to meet the requirements of actual assembly, resulting in the need for repeated mold modification and debugging in production to achieve the best matching state, which is labor-intensive and time-consuming.

[0005] The patent application with publication number CN112501961A discloses a shoulder-type vibration-damping fastener, which realizes lateral fixation of the upper pad by setting a lateral stop block and multiple wedge-shaped limiting surfaces that cooperate with each other. At the same time, the wedge-shaped surface is used to reduce the processing difficulty to a certain extent, thereby reducing the difficulty of matching between the upper pad, the lateral stop block and the lower pad; although the innovative design of the shoulder-type vibration-damping fastener effectively reduces the complexity of assembly, in an environment where it is subjected to repeated vibration for a long time, the tight fit between the upper pad, the lateral stop block and the lower pad is difficult to maintain, which is specifically manifested in that the lateral stop block may undergo a small but significant displacement. Although this change seems negligible, it is enough to weaken the lateral restraining force, thereby adversely affecting the overall performance and stability of the vibration-damping fastener. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a shoulder-type vibration-damping fastener, which effectively solves the technical problems in the prior art that the lateral stopper is prone to loosening due to long-term vibration, and the lateral stopper moves outward, resulting in a reduction in the lateral limiting capacity of the vibration-damping fastener system.

[0007] The utility model provides a shoulder-blocking vibration-damping fastener, comprising: a lower pad, an elastic pad arranged on the upper side of the lower pad, and an upper pad arranged on the upper side of the elastic pad;

[0008] The lower pad is provided with transverse shoulders at both ends, and the upper pad is provided with transverse limiting surfaces corresponding to the transverse shoulders. The transverse shoulders and the transverse limiting surfaces are limited by transverse blocks, and a wedge-shaped surface fit is formed between the transverse blocks and the transverse limiting surfaces;

[0009] The invention is characterized in that it also includes a limiting hole and a limiting column, the limiting hole is provided on at least one of the front side surface and the rear side surface at the intersection of the transverse stopper and the transverse limiting surface, and the limiting column is installed in the limiting hole.

[0010] Furthermore, the limiting holes are opened on the transverse shoulder, the transverse stopper and the transverse limiting surface.

[0011] Furthermore, the limiting column is installed in the limiting hole by interference fit.

[0012] Furthermore, the limiting hole is provided with an internal thread, and the limiting column is provided with an external thread matching the internal thread.

[0013] Furthermore, an end head with a diameter larger than that of the limiting column is fixed to the outer end of the limiting column, and a spring washer is sleeved on the limiting column and pressed outside the limiting hole through the end head.

[0014] Furthermore, the outer side of the limiting hole is connected to a mounting hole having a diameter larger than that of the limiting hole, and the end head is placed in the mounting hole.

[0015] Furthermore, the lower end surface of the transverse stopper is an arc surface or the side edge of the lower end surface is chamfered.

[0016] Furthermore, a notch extending along the axial direction of the limiting column is formed at the insertion end of the limiting column.

[0017] Furthermore, a vertically extending guide groove with an open upper end is formed on the transverse shoulder, and a guide strip cooperating with the guide groove is provided on the transverse stop block.

[0018] Furthermore, the elastic pad extends to the inner side surface of the transverse shoulder.

[0019] The embodiments of the present utility model have the following technical effects:

[0020] 1. The utility model does not change the wedge-shaped assembly mode of the original transverse block, and can limit the moving position of the transverse block only by setting the limiting hole and the limiting column, so that the original processing equipment does not need to be changed, and the vibration-damping fasteners that have been processed can be directly modified. Overall, the increased cost is not high on the basis of improving the effect; and the original advantage of reducing the matching accuracy is still retained;

[0021] 2. The limit holes of the utility model are arranged on the transverse stopper and the transverse limit surface, and the transverse stopper is blocked by the transverse limit surface in the vertical direction through the limit column, so that it is not easy to move upward;

[0022] 3. Compared with the prior art, the utility model sets the limiting holes on the transverse shoulder, the transverse stopper and the transverse limiting surface, which also realizes the self-locking of the upper and lower base plates.

[0023] 4. The utility model provides guide strips and guide grooves, so that when the transverse block is inserted between the transverse block shoulder and the transverse limit surface, it has a certain guiding effect, and after the insertion is completed, the guide strips and guide grooves limit the forward and backward movement of the transverse block, making the connection more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is the front view of Example 1 of the utility model;

[0026] Figure 2It is a three-dimensional diagram of Example 1 of the utility model;

[0027] Figure 3 This is a three-dimensional view of the horizontal stopper and the limit column of Example 1 in this embodiment being pulled out;

[0028] Figure 4 It is a partial stereogram of Example 3 of the utility model provided with external threads and Example 4 provided with a terminal head and a spring washer;

[0029] Figure 5 This is a three-dimensional diagram of a limit hole provided on the transverse stopper of Example 1 of the utility model;

[0030] Figure 6 This is a three-dimensional diagram of an internal thread being arranged in a limiting hole in Example 3 of the utility model;

[0031] Figure 7 It is a partial stereogram of embodiment 5 of the utility model provided with a mounting hole;

[0032] Figure 8 A three-dimensional diagram of a notched limit post in Example 6 of the present utility model;

[0033] Fig. 9 It is a partial stereogram of Example 7 of the utility model provided with a guide groove;

[0034] Fig.10 This is a three-dimensional diagram of Example 7 of the present utility model provided with a guide strip.

[0035] Explanation of the accompanying drawings: lower pad 1, transverse shoulder 101, elastic pad 2, upper pad 3, transverse limiting surface 301, transverse stop block 4, limiting hole 5, internal thread 501, limiting column 6, external thread 601, end 602, spring washer 7, mounting hole 8, notch 9, guide groove 10, guide strip 11. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0037] Embodiment 1,

[0038] like Figure 1 , 2As shown in Figures 3 and 5, the utility model designs a shoulder-type vibration-damping fastener, comprising a lower pad 1, an elastic pad 2 arranged on the upper side of the lower pad 1 and an upper pad 3 arranged on the upper side of the elastic pad 2, the lower pad 1 is provided with a transverse shoulder 101, the transverse shoulder 101 is arranged at the diagonals on the left and right sides of the lower pad 1, the upper pad 3 is provided with a transverse limiting surface 301 corresponding to the transverse shoulder 101, the transverse shoulder 101 and the transverse limiting surface 301 are limited by a transverse stopper 4, a wedge-shaped surface fit is formed between the transverse stopper 4 and the transverse limiting surface 301, and the wedge-shaped fit makes it easier for the transverse stopper 4 to be assembled into the gap between the transverse shoulder 101 and the transverse limiting surface 301.

[0039] In order to reduce the difficulty of matching between the transverse shoulder 101 of the lower pad, the transverse limiting surface 301 of the upper pad 3 and the transverse stopper 4, a wedge-shaped structure is provided on the transverse limiting surface 301 of the upper pad 3, and a reverse wedge-shaped structure is provided on the corresponding transverse stopper 4. The reverse wedge-shaped structure on the transverse stopper 4 and the wedge-shaped structure on the transverse limiting surface 301 of the upper pad 3 can eliminate the tolerance gap between the upper pad 3 and the transverse stopper 4 due to manufacturing and processing, thereby improving the matching effect between them.

[0040] It also includes a limiting hole 5 and a limiting column 6. The limiting hole 5 is provided on at least one of the front side and the rear side where the transverse stopper 4 and the transverse limiting surface 301 meet, and the limiting column 6 is installed in the limiting hole 5.

[0041] The limiting hole 5 covers the transverse stopper 4 and the transverse limit surface 301. When the limiting column 6 is a column, the limiting column 6 is installed in the limiting hole 5 by interference fit. The end face of the limiting column 6 at one end is semicircular or chamfered, which is convenient for the limiting column 6 to enter the limiting hole 5. The limiting column 6 has a certain deformation ability and high mechanical strength. The material of the limiting column 6 can be made of cast iron, alloy and other materials, or a composite of rigid and flexible materials. The limiting hole 5 spans the transverse stopper 4 and the transverse limit surface 301, and the limiting column 6 is interference fit in the limiting hole 5. The limiting column 6 can be circular or rectangular. The vertical displacement of the transverse stopper 4 is prevented by placing the limiting column 6 in the transverse stopper 4 and the transverse limit surface 301 at the same time.

[0042] Embodiment 2,

[0043] The limiting hole 5 is opened on the transverse shoulder 101, the transverse stopper 4 and the transverse limiting surface 301. The limiting column 6 is interference-fitted in the limiting hole 5. The limiting column 6 is made of the same material as in the previous embodiment. The limiting column 6 can also be a round column or a rectangular column, and the entry end of the limiting column 6 is semicircular or chamfered. The limiting column 6 spans the transverse shoulder 101, the transverse stopper 4 and the transverse limiting surface 301, so that the three mutually restrict the vertical displacement, so that this embodiment not only realizes the limitation of the transverse stopper 4, but also realizes that the upper pad 3 is limited and fastened to the lower pad 1, so that the locking force of the self-locking boss and the bottom plate connecting sleeve on the upper and lower pads 1 in the prior art can be shared.

[0044] Embodiment 3,

[0045] like Figure 4 , 6 As shown, on the basis of Example 1 or Example 2, the limiting hole 5 is provided with an internal thread 501, and the limiting column 6 is provided with an external thread 601 that matches the internal thread 501. When the limiting hole 5 and the limiting column 6 are threadedly matched, the matching between the limiting column 6 and the limiting hole 5 is more tightly secured, and due to the characteristics of thread matching, the limiting column 6 at this time not only realizes vertical limiting, but also realizes longitudinal limiting, that is, the transverse block 4 is not only restricted in vertical displacement by the limiting column 6, but also in longitudinal displacement.

[0046] Embodiment 4,

[0047] like Figure 4 As shown, on the basis of Example 3, the outer end of the limiting column 6 is fixed with an end head 602 having a larger diameter than the limiting column 6, and the limiting column 6 is sleeved with a spring washer 7 pressed outside the limiting hole 5 through the end head 602. At this time, the limiting column 6 is equivalent to a bolt, and the anti-loosening property of the bolt is increased by the spring washer 7.

[0048] Embodiment 5,

[0049] like Figure 7 As shown, on the basis of Example 4, the outer side of the limiting hole 5 is connected to the mounting hole 8 whose diameter is larger than that of the limiting hole 5, and the end 602 is placed in the mounting hole 8. The mounting hole is coaxial with the limiting hole. At this time, the mounting hole 8 is used as a hole to hide the end 602, the purpose is to be beautiful in appearance, so that the end 602 is not exposed. Of course, when the limiting column is in a cylindrical state, its end can be round or hexagonal. When the limiting column has an external thread, in order to facilitate the external thread to be screwed in, the end is hexagonal.

[0050] Embodiment 6,

[0051] like Figure 8As shown, on the basis of Example 1 or 2, the insertion end of the limit column 6 is provided with a notch 9 extending along the axial direction of the limit column 6. At this time, the notch 9 is provided so that when the limit column 6 is inserted into the limit hole 5, due to the interference fit, the notch 9 can be pressed to shrink at this time. After insertion, due to the elastic effect of the contraction of the notch 9, it is more convenient to install. During installation, it is necessary to pay attention to the position of the notch 9 being staggered with the junction of the transverse stopper 4 and the transverse limit surface 301 to ensure the limiting effect of the limit column 6. Of course, the notch 9 does not run through the entire limit column 6. Generally speaking, the notch 9 occupies half of the length of the limit column 6.

[0052] Embodiment 7,

[0053] like Figure 9-10 As shown, on the basis of any one of Embodiments 1 to 6, the transverse shoulder 101 is provided with a vertically extending guide groove 10 with an opening at the upper end, and the transverse block 4 is provided with a guide bar 11 that cooperates with the guide groove 10. Through the cooperation of the guide groove 10 and the guide bar 11, the transverse block 4 has a guiding property when inserted and assembled, and can be designed according to an ideal position. At the same time, the guide groove 10 and the guide bar 11 play a role in longitudinally limiting the transverse block 4. In this way, the vertical and longitudinal limits of the transverse block 4 are generally constituted, making it less likely to move.

[0054] Embodiment 8. Based on any one of Embodiments 1-7, the elastic pad 2 extends to the inner side of the transverse shoulder 101. The elastic pad 2 extends to the inner side of the transverse shoulder 101, so that the elastic pad 2 fills the gap between the transverse shoulder 101 and the transverse limit surface 301. The purpose is that when the transverse block 4 is inserted into the gap, if the size of the transverse block 4 is slightly larger than the design size, due to the elastic effect of the elastic pad 2, the transverse block 4 can overcome the elasticity of the elastic pad 2 and continue to move downward, so that the design accuracy requirement of the transverse block 4 is reduced.

[0055] In all the above embodiments, the limiting hole 5 is preferably provided on both the front side and the rear side of the transverse stopper 4. It should be noted that, in order to clearly explain the present application, in the present application, the direction of train travel is referred to as "longitudinal" and the horizontal direction perpendicular to the direction of train travel is referred to as "transverse".

[0056] The utility model transforms the original transverse stopper 4 so that the original production line does not need to be changed, and the original beneficial effects such as the wedge-shaped transverse stopper 4 being used to reduce the difficulty of matching are still retained. It is sufficient to open a hole and make a limit column 6 on the original basis, which not only does not increase the cost, but also effectively limits the vertical displacement and longitudinal displacement of the transverse stopper 4, thereby improving its working stability, especially the embodiment spanning the transverse stop shoulder 101, the transverse stopper 4 and the transverse limit surface 301, which not only realizes the limitation of the transverse stopper 4, but also realizes the limitation of the upper pad 3 and the lower pad 1, thereby increasing the stability of the connection between the two.

[0057] It should be noted that the terms used in the present invention are only for describing specific embodiments, rather than limiting the scope of the present application. As shown in the present utility model specification, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method 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 or device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0058] It should also be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the utility model.

Claims

1. A shoulder-type vibration-damping fastener, characterized in that: include: A lower pad (1), an elastic pad (2) arranged on the upper side of the lower pad (1), and an upper pad (3) arranged on the upper side of the elastic pad (2); The lower pad (1) is provided with transverse shoulders (101) at both ends, the upper pad (3) is provided with a transverse limiting surface (301) corresponding to the transverse shoulder (101), the transverse shoulder (101) and the transverse limiting surface (301) are limited by a transverse stopper (4), and a wedge-shaped surface fit is formed between the transverse stopper (4) and the transverse limiting surface (301); The invention is characterized in that it also comprises a limiting hole (5) and a limiting column (6), wherein the limiting hole (5) is provided on at least one of the front side surface and the rear side surface at the junction of the transverse stopper (4) and the transverse limiting surface (301), and the limiting column (6) is installed in the limiting hole (5).

2. A shoulder-type vibration-damping fastener according to claim 1, characterized in that: The limiting hole (5) is opened on the transverse stop shoulder (101), the transverse stop block (4) and the transverse limiting surface (301).

3. The shoulder-type vibration-damping fastener according to claim 1, characterized in that: The limiting column (6) is installed in the limiting hole (5) by interference fit.

4. A shoulder-type vibration-damping fastener according to claim 3, characterized in that: The limiting hole (5) is provided with an internal thread (501), and the limiting column (6) is provided with an external thread (601) that matches the internal thread (501).

5. The shoulder-type vibration-damping fastener according to claim 4, characterized in that: The outer end of the limiting column (6) is fixed with an end head (602) having a diameter larger than that of the limiting column (6), and the limiting column (6) is sleeved with a spring washer (7) which is pressed against the outside of the limiting hole (5) through the end head (602).

6. A shoulder-type vibration-damping fastener according to claim 5, characterized in that: The outer side of the limiting hole (5) is connected to a mounting hole (8) having a diameter greater than that of the limiting hole (5), and the end head (602) is placed in the mounting hole (8).

7. The shoulder-type vibration-damping fastener according to claim 2, characterized in that: The lower end surface of the transverse stopper (4) is an arc surface or the side edge of the lower end surface is chamfered.

8. The shoulder-type vibration-damping fastener according to claim 5, characterized in that: The insertion end of the limiting column (6) is provided with a notch (9) extending along the axial direction of the limiting column (6).

9. The shoulder-type vibration-damping fastener according to claim 1, characterized in that: The transverse shoulder (101) is provided with a vertically extending guide groove (10) with an open upper end, and the transverse stopper (4) is provided with a guide strip (11) that cooperates with the guide groove (10).

10. The shoulder-type vibration-damping fastener according to claim 1, characterized in that: The elastic pad (2) extends onto the inner side of the transverse shoulder (101).

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