CN114351513A

CN114351513A - Bolt connection pair anti-loosening device and local structure of railway turnout

Info

Publication number: CN114351513A
Application number: CN202210106224.5A
Authority: CN
Inventors: 邓雨薇; 沙尚典
Original assignee: Sichuan Huaxing Express Railway Engineering Co ltd
Current assignee: Sichuan Huaxing Express Railway Engineering Co ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-04-15

Abstract

The embodiment of the invention provides a bolt connecting pair anti-loosening device and a local structure of a railway turnout, and relates to the technical field of railway tracks. The anti-loosening device of the bolt connecting pair comprises an anti-loosening piece, a bolt and a nut. The bolt is used for passing in proper order and treats installed part and locking piece and cooperate with the nut, locking piece be used for with treat installed part fixed connection, the outer wall cooperation of locking piece and nut supports the outer wall of holding the nut under the condition that the nut has the rotation trend to prevent that the nut from rotating, thereby prevent that bolted connection is vice not hard up, avoid the nut to drop, ensure the stable in structure of the vice locking device of bolted connection, and adopt railway switch mounting structure stable maintenance behind this device.

Description

Bolt connection pair anti-loosening device and local structure of railway turnout

Technical Field

The invention relates to the technical field of railway tracks, in particular to a bolt connection pair anti-loosening device and a local structure of a railway turnout.

Background

Bolted joints are widely used in a variety of equipment, and railroad switches where they are used to connect rails and other components and maintain their structural stability. In the process that a train passes through a railway turnout, as the wheel forms frequent and violent impact vibration on the turnout, the nut can be loosened or even separated from the bolt after being vibrated for a long time, and further the position and the structure of the steel rail can not be fixed so as to ensure the track state and the smoothness of the railway turnout, and the safety of the train passing through the railway turnout is seriously influenced.

Disclosure of Invention

The invention aims to provide a bolt connection pair anti-loosening device and a local structure of a railway turnout, which can prevent a nut from loosening, ensure the stable connection of the bolt connection pair and ensure that the structural state of the railway turnout structure can be stably maintained in the process of frequent vibration of a train.

Embodiments of the invention may be implemented as follows:

in a first aspect, the invention provides a locking device of a bolt connecting pair, which comprises a locking piece, a bolt and a nut;

the bolt is used for sequentially penetrating through the piece to be installed and the anti-loosening piece and is matched with the nut;

the anti-loosening piece is used for being fixedly connected with the to-be-installed piece, and the anti-loosening piece is matched with the outer wall of the nut and abuts against the outer wall of the nut under the condition that the nut has a rotating trend so as to prevent the nut from rotating.

In an optional embodiment, the anti-loosening element includes a supporting portion and a fixing portion, the fixing portion is connected to the supporting portion, the fixing portion is used for being fixedly matched with the element to be installed, and the supporting portion corresponds to the outer wall of the nut and is used for supporting the outer wall of the nut when the nut has a rotation trend.

In an optional embodiment, the abutting portion has two first abutting surfaces arranged oppositely, and the two first abutting surfaces are respectively used for abutting against two side walls opposite to the nut.

In an optional embodiment, the abutting portion has two second abutting surfaces arranged at an included angle, the two second abutting surfaces are connected with each other and are respectively connected with the first abutting surface, and the two second abutting surfaces are respectively used for abutting against two adjacent side walls of the nut.

In an optional embodiment, the bolt connection pair anti-loosening device further comprises a fixing piece, the fixing piece is used for being fixedly connected with the piece to be installed, and the anti-loosening piece is fixedly connected with the fixing piece through the fixing portion.

In an optional embodiment, the auxiliary anti-loosening device for bolt connection further includes a split pin, the fixing portion is provided with a first through hole, the fixing member is provided with a first protruding block in a protruding manner, the first protruding block is provided with a second through hole, and the split pin penetrates through the first through hole and the second through hole to fixedly connect the fixing portion and the first protruding block.

In an optional embodiment, the fixing portion is provided with a through groove with an opening facing the fixing member, the first through hole is provided on two side walls of the through groove, the first protrusion can be embedded into the through groove, and the cotter pin penetrates through the first through hole and the second through hole to fix the first protrusion in the through groove.

In an optional embodiment, the fixing member is convexly provided with a second protruding block, the second protruding block includes a first limiting portion and a second limiting portion, two ends of the first limiting portion are respectively connected with the fixing member and the second limiting portion, and the second limiting portion is oppositely arranged on the fixing member to form a clamping groove;

the anti-loosening piece is provided with a clamping part, the clamping part is connected with the abutting part, and the clamping part can be embedded into the clamping groove and is in clamping fit with the second bump.

In an optional embodiment, the fixing member is provided with a mounting hole for the bolt to pass through, the number of the second protrusions includes two, the two second protrusions are disposed on two sides of the mounting hole and are distributed in a triangular manner with the first protrusion, and the nut can be screwed between the first protrusion and the two second protrusions.

In a second aspect, the present invention provides a partial structure of a railway switch, including a guard rail structure assembled by using a bolt-connection pair anti-loosening device according to any one of the foregoing embodiments.

The bolt connection pair anti-loosening device and the local structure of the railway turnout provided by the embodiment of the invention have the beneficial effects that: through the installation anti-loosening piece and make its outer wall cooperation with the nut to under the condition that the nut has the rotation trend, support the outer wall of holding the nut by locking piece, in order to prevent that the nut from rotating, thereby prevent that bolted connection is vice not hard up, avoid the nut to drop, ensure the structural stability and the stable locking performance of vice locking device of bolted connection.

Drawings

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

FIG. 1 is a schematic structural diagram of a first embodiment of a partial structure of a railway switch according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a locking device of a bolt connecting pair according to an embodiment of the present invention;

fig. 3 is a schematic view of a first perspective structure of the anti-loosening element according to the embodiment of the present invention;

FIG. 4 is a schematic view of a second perspective view of the anti-loosening element according to the present invention;

fig. 5 is a schematic structural view of a fixing member according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of a fixing member according to a second embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a second embodiment of a partial structure of a railway switch according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a rail guard brace structure according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a third embodiment of a partial structure of a railway switch according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a rail washer configuration according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a fourth embodiment of a partial structure of a railway switch according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a nut and washer provided in the embodiment of the present invention.

Icon: 10-local structure of railway turnout; 11-a bolt connection auxiliary anti-loosening device; 12-guard rail supporting plate; 13-a guard rail; 20-a component to be mounted; 21-rail gasket; 22-nut washer; 100-a locking piece; 110-a holding portion; 111-a first holding surface; 112-a second holding surface; 120-a stationary part; 121 — a first via; 122-a through slot; 130-a catch; 200-a fixture; 210-mounting holes; 220-first bump; 221-a second via; 230-a second bump; 231-a first limiting part; 232-a second limiting part; 233-card slot; 240-a settlement zone; 300-cotter pin; 400-bolt; 500-nut.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

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

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

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

First embodiment

Referring to fig. 1, the present invention provides a local structure 10 of a railway switch, which is a track device for switching a train from one track to another track in the railway industry.

In the embodiment, the partial structure 10 of the railway turnout comprises a bolt connection auxiliary anti-loosening device 11, a guard rail supporting plate 12 and a guard rail 13.

Specifically, the guard rail 13 is arranged at an interval with the rail, one side surface of the guard rail supporting plate 12 is connected with the guard rail 13, the other side surface of the guard rail supporting plate is connected with the auxiliary bolt connection anti-loosening device 11, the guard rail 13 is fixedly connected with the guard rail supporting plate 12 through the auxiliary bolt connection anti-loosening device 11, the auxiliary bolt 400 connection pair for connecting the guard rail 13 and the guard rail supporting plate 12 can be prevented from loosening, the structural stability of the guard rail is improved, and therefore the driving safety is ensured.

Referring to fig. 2, the anti-loosening device 11 for a bolt connection pair provided by the present invention may be used for a local structure 10 of a railway switch, and may also be used for other devices or apparatuses connected by a bolt 400 connection pair, as long as the devices or apparatuses can be connected by a bolt 400 connection pair, and is not limited specifically herein.

The bolt-connecting sub-anti-loosening device 11 includes an anti-loosening element 100, a fixing element 200, a cotter 300, a bolt 400, and a nut 500.

In the present embodiment, the nut 500 sequentially passes through the plurality of to-be-mounted members 20 and the fixing member 200 and is engaged with the nut 500 to fixedly connect the plurality of to-be-mounted members 20, and at the same time, the fixing member 200 is fixedly connected with the to-be-mounted members 20 to fixedly mount the fixing member 200 on the surface of the to-be-mounted members 20. The locking member 100 is fixedly coupled to the fixing member 200 through the cotter pin 300 to enable the locking member 100 to be detachably mounted to the fixing member 200, and the locking member 100 is disposed around the outer wall of the nut 500 to prevent the nut 500 from rotating.

It should be noted that, in the present embodiment, the member to be installed 20 may be a guard rail bracing plate, and in other embodiments of the present invention, the member to be installed 20 may also be other devices or components, which are not specifically limited herein.

Further, the check member 100 may be fixedly connected with the member to be mounted 20, and the check member 100 is engaged with the outer wall of the nut 500 and abuts against the outer wall of the nut 500 in case that the nut 500 has a tendency to rotate, so as to prevent the nut 500 from rotating.

It should be understood that the locking member 100 is fixedly connected to the member to be installed 20 by the fixing member 200, and in other embodiments, in the case where the member to be installed 20 can directly fix the locking member 100, the locking member 100 may be directly fixedly installed on the member to be installed 20.

In this embodiment, the locking member 100 is disposed around the outer wall of the nut 500, and may directly contact with the outer wall or be spaced apart from the outer wall. Since the anti-loosening element 100 is fixedly installed on the to-be-installed element 20 or the fixing element 200, the anti-loosening element 100 can abut against the outer wall of the nut 500 under the condition that the nut 500 has a rotation tendency, so as to prevent the nut 500 from rotating, thereby preventing the bolt 400 from loosening and preventing the nut 500 from falling off.

Further, referring to fig. 2 to 4, the anti-loose element 100 includes a supporting portion 110, a fixing portion 120 and a retaining portion 130.

The fixing portion 120 is connected to the supporting portion 110, the fixing portion 120 is used for being fixedly matched with the component to be mounted 20, the supporting portion 110 corresponds to an outer wall of the nut 500 and is used for supporting the outer wall of the nut 500 under the condition that the nut 500 has a rotation tendency, and the clamping portion 130 is connected to the supporting portion 110 and is used for being clamped and matched with the fixing member 200.

In the embodiment, the anti-loosening element 100 is Y-shaped and is composed of the abutting portion 110 and the fixing portion 120, and the abutting portion 110 has two branches, so that the anti-loosening element 100 can be disposed around the outer wall of the nut 500 in a clamping posture, thereby facilitating the abutting portion 110 to abut against the outer wall of the nut 500. The fixing portion 120 is connected to a side of the abutting portion 110 away from the nut 500, so that the anti-loose element 100 is fixedly connected to the fixing element 200 or the to-be-installed element 20 through the fixing portion 120.

Further, the fixing portion 120 is connected to a portion of the middle portion of the abutting portion 110 that is shifted to the left or right side, so that the locking member 100 has an asymmetric shape, thereby providing an installation space for the cotter pin 300 when the bolt-coupled sub-locking device 11 is installed in a small left-right space.

Further, the abutting portion 110 has two first abutting surfaces 111 and two second abutting surfaces 112, the two first abutting surfaces 111 are disposed oppositely, and the two first abutting surfaces 111 are respectively used for abutting against two side walls opposite to the nut 500.

In the present embodiment, the nut 500 is generally a hexagonal nut 500. The two first abutting surfaces 111 are arranged oppositely and in parallel, and the distance between the two first abutting surfaces 111 is smaller than the maximum circular diameter generated by the outer wall of the nut 500 when the nut 500 rotates, and is larger than the distance between the two opposite side walls of the nut 500, so that the nut 500 can be positioned between the two first abutting surfaces 111 of the abutting portion 110, and meanwhile, the first abutting surfaces 111 can abut against the outer wall of the nut 500 under the condition that the nut 500 has a rotation trend, so that the nut 500 is prevented from rotating.

In addition, the two second abutting surfaces 112 form an included angle, and the two second abutting surfaces 112 are respectively used for abutting against two adjacent side walls of the nut 500. The first abutting surfaces 111 and the second abutting surfaces 112 are also arranged at an included angle, that is, the first abutting surfaces 111 and the second abutting surfaces 112 together enclose a structure which can be adapted to a plurality of outer walls of the nut 500, two outer walls of the two first abutting surfaces 111 opposite to the nut 500 abut against each other, and the two second abutting surfaces 112 abut against the other two outer walls of the nut 500 adjacent to each other, so that the nut 500 can be further prevented from rotating, and the anti-loose performance of the bolt connecting auxiliary anti-loose device 11 is enhanced.

Further, the fixing portion 120 is provided with a first through hole 121, and the first through hole 121 is used for the cotter pin 300 to pass through, so that the fixing portion 120 and the fixing member 200 are fixedly connected through the cotter pin 300.

In the present embodiment, the fixing portion 120 is provided with a through groove 122 opening toward the fixing member 200, the first through hole 121 is provided on two side walls of the through groove 122, and the through groove 122 is used for being fixedly matched with the fixing member 200.

Further, the holding portion 130 is disposed on two sides of the anti-loose element 100 and connected to the supporting portion 110, and the holding portion 130 is disposed opposite to the first supporting surface 111.

Specifically, the holding portion 130 is connected to a side of the abutting portion 110 close to the fixing member 200, and the holding portion 130 is used for holding and cooperating with the fixing member 200 to prevent the anti-loosening element 100 from falling off or rotating.

Referring to fig. 2 and 5, the fixing member 200 is provided with a mounting hole 210 for the bolt 400 to pass through, and a first protrusion 220 and a second protrusion 230 are protruded.

In the embodiment, the first protrusion 220 is used for being fixedly matched with the fixing portion 120 to fix the anti-loosening element 100; the second protrusion 230 is used for being engaged with the retaining portion 130, so as to prevent the anti-loose element 100 from falling off or rotating.

Specifically, the number of the second protrusions 230 includes two, and the two second protrusions 230 are disposed on two sides of the mounting hole 210 and are distributed in a triangular manner with the first protrusion 220, so that the anti-loose member 100 is more stably fixed and clamped with the fixing member 200 through the first protrusion 220 and the second protrusion 230, thereby ensuring the anti-loose performance of the anti-loose member 100 on the nut 500.

It should be understood that the nut 500 may be screwed between the first projection 220 and the two second projections 230, i.e., there is a screwing space between the first projection 220 and the two second projections 230 for the nut 500 to be freely screwed.

Further, the heights of the first projection 220 and the two second projections 230 are lower than the thickness of the nut 500, so that the first projection 220 or the second projection 230 is prevented from interfering with a screwing space of a wrench during screwing of the nut 500 by the wrench, thereby ensuring that the nut 500 can be screwed.

Further, the first bump 220 is opened with a second through hole 221.

In the embodiment, when the fixing portion 120 corresponds to the first bump 220, the first through hole 121 can communicate with the second through hole 221, and the cotter pin 300 penetrates through the first through hole 121 and the second through hole 221 to fixedly connect the fixing portion 120 and the first bump 220.

Specifically, since the fixing portion 120 is provided with the through groove 122 adapted to the first bump 220, the first bump 220 can be inserted into the through groove 122, and the cotter pin 300 penetrates through the first through hole 121 and the second through hole 221, so that the first bump 220 is fixed in the through groove 122, and the structural stability and the strength of the fixing fit between the fixing portion 120 and the first bump 220 are further improved.

Further, the second bump 230 includes a first position-limiting portion 231 and a second position-limiting portion 232, two ends of the first position-limiting portion 231 are respectively connected with the fixing member 200 and the second position-limiting portion 232, and the second position-limiting portion 232 is oppositely disposed on the fixing member 200 to form a slot 233.

In the embodiment, the two slots 233 formed by the two second protrusions 230 are disposed oppositely, the anti-loose member 100 can be just accommodated between the two slots 233, and the clamping portions 130 at two ends of the anti-loose member 100 can be slidably engaged with the slots 233, so as to facilitate the installation or the detachment of the anti-loose member 100. Furthermore, the retaining portion 130 can be inserted into the slot 233 and can be retained and engaged with the second protrusion 230.

Specifically, the first position-limiting portion 231 abuts against the retaining portion 130, so as to prevent the anti-loosening element 100 from rotating; the second position-limiting portion 232 abuts against the retaining portion 130, so as to prevent the anti-loose element 100 from falling off along the installation direction of the nut 500.

Further, the fixing member 200 is provided with a subsidence area 240, the subsidence area 240 is located on a surface lower than the surface of the fixing member 200, and the first protrusions 220 are located in the subsidence area 240.

In the present embodiment, the first protrusion 220 is disposed in the subsidence area 240, so as to provide more installation space for installing the cotter 300, and facilitate the installation and removal of the cotter 300. In practical applications, the thickness of the fixing member 200 is reduced due to the settling region 240, so that the strength of the fixing member 200 is reduced, and therefore, the settling region 240 may be provided only on one side of the direction in which the cotter 300 is inserted, as shown in fig. 6, to facilitate the installation or removal of the cotter 300 and to ensure the structural strength of the fixing member 200.

Further, both ends of mounting 200 still are provided with first boss and second boss respectively, and first boss is used for the lock in the top of treating installed part 20 to prevent that mounting 200 from treating the installed part 20 rotation relatively, thereby guarantee that anti-loosening member 100 is stable installs on mounting 200, avoid anti-loosening member 100 to follow the mounting 200 rotatory, influence locking effect. The second boss can be regarded as a small step arranged at the bottom end of the fixing member 200, and the second boss is used for slightly inclining the fixing member 200 relative to the plane where the to-be-installed member 20 is located, so that the first boss and the to-be-installed member 20 are buckled more stably, and the stability of the fixing member is enhanced.

Second embodiment

Referring to fig. 7 and 8, fig. 7 is a schematic view of a partial structure of a railway switch according to a second embodiment of the present application, and fig. 8 is a schematic view of a rail guard brace structure.

The difference between the second embodiment and the first embodiment is that the fixing member 200 is directly integrated with the member to be mounted 20, that is, the fixing member 200 and the member to be mounted are an integral body, and for the sake of brief description, the embodiment can refer to the corresponding content in the first embodiment without reference.

In this embodiment, the member to be installed 20 is a guard rail supporting plate 12, one surface of the guard rail supporting plate 12 is connected to the guard rail 13, and the other surface is connected to the bolt-fastening sub-locking device 11. Of course, the member to be mounted 20 may be other devices or components, and is not limited in particular.

Specifically, a mounting hole 210, a first protrusion 220 and two second protrusions 230 are provided on the guard rail stay 12. The mounting hole 210 is used for the bolt 400 to pass through, the first protrusion 220 and the two second protrusions 230 are located around the mounting hole 210, and the first protrusion 220 and the two second protrusions 230 are distributed in a triangular shape. In addition, guard rail fagging 12 is provided with subside area 240, and first lug 220 is provided in subside area 240.

Third embodiment

Referring to fig. 9 and 10, fig. 9 is a schematic view of a partial structure of a railway switch according to a third embodiment of the present application, and fig. 10 is a schematic view of a rail washer according to the third embodiment of the present application.

The third embodiment is different from the first embodiment in that the fixing member 200 is directly integrated into the member to be installed 20, the member to be installed 20 is a rail washer 21, and for the sake of brief description, the embodiment can refer to the corresponding content in the first embodiment without reference.

In this embodiment, one surface of the rail washer 21 is connected to the guard rail 13, and the other surface is connected to the bolt fastening sub retainer 11. Of course, the member to be mounted 20 may be other devices or components, and is not limited in particular.

Specifically, the rail washer 21 is provided with a mounting hole 210, a first projection 220, and two second projections 230. The mounting hole 210 is used for the bolt 400 to pass through, the first protrusion 220 and the two second protrusions 230 are located around the mounting hole 210, and the first protrusion 220 and the two second protrusions 230 are distributed in a triangular shape. In addition, guard rail fagging 12 is provided with subside area 240, and first lug 220 is provided in subside area 240.

Fourth embodiment

Referring to fig. 11 and 12, fig. 11 is a schematic view of a partial structure of a railway switch according to a fourth embodiment of the present application, and fig. 12 is a schematic view of a nut and washer according to the fourth embodiment of the present application.

The fourth embodiment is different from the first embodiment in that the fixing member 200 is directly integrated into the member to be installed 20, the bolt-connecting secondary anti-loosening device 11 is applied to the leveling assembly of two non-parallel rails, the member to be installed 20 is a nut-washer 22, and for the sake of brief description, the embodiment can refer to the corresponding content in the first embodiment where nothing is mentioned.

In this embodiment, one surface of the nut washer 22 is connected to a base (not shown) and the other surface is connected to the bolt-fastening sub-locking device 11, and the base is used for being fixedly connected to the side wall of the rail.

Specifically, the nut washer 22 is provided with a mounting hole 210, a first projection 220 and two second projections 230. The mounting hole 210 is used for the bolt 400 to pass through, the first protrusion 220 and the two second protrusions 230 are located around the mounting hole 210, and the first protrusion 220 and the two second protrusions 230 are distributed in a triangular shape. In addition, guard rail fagging 12 is provided with subside area 240, and first lug 220 is provided in subside area 240.

In practical application, the fixing member 200 is first fastened to the member to be installed 20, the bolt 400 is then sequentially passed through the member to be installed 20, the anti-loosening member 100 and the nut 500 to be engaged with each other, the nut 500 is rotated until the outer walls on both sides are vertical, the fastening portion 130 of the anti-loosening member 100 is aligned with the slot 233, the through slot 122 of the fixing portion 120 of the anti-loosening member 100 is aligned with the first protrusion 220, the anti-loosening member 100 is slid until the fastening portion 130 and the slot 233 are fastened and engaged with each other, so that the first abutting surface 111 and the second abutting surface 112 abut against the outer wall of the nut 500, the first protrusion 220 is embedded into the through slot 122, the opening pin 300 is passed through the first through hole 121 and the second through hole 221, and the installation of the bolt-connected secondary anti-loosening device 11 is completed. The disassembling process of the bolt joint sub anti-loosening device 11 is opposite to the above operation, and is not described in detail herein.

In summary, the embodiment of the present invention provides a locking device 11 for a bolt connection pair and a local structure 10 of a railway switch, wherein the locking device 100 is installed and matched with an outer wall of a nut 500, so that the locking device 100 abuts against the outer wall of the nut 500 to prevent the nut 500 from rotating when the nut 500 has a rotation tendency, thereby preventing the locking device 400 from loosening, avoiding the nut 500 from falling off, and ensuring structural stability and locking performance of the locking device 11 for the bolt connection pair. The anti-loose piece 100 comprises an abutting part 110, a fixing part 120 and a clamping part 130, the fixing part 200 comprises a first bump 220 and a second bump 230, the first bump 220 is fixed in the through groove 122 of the fixing part 120, and the fixing part 120 and the first bump 220 are fixed through the cotter pin 300, so that the fixing of the anti-loose piece 100 is realized, and the structural stability and the fixing matching strength of the fixing part 120 and the first bump 220 are improved; the clamping part 130 is in sliding fit with the second bump 230, so that the anti-loosening element 100 can be conveniently mounted and dismounted, and meanwhile, the clamping part 130 can be in clamping fit with the second bump 230, so that the anti-loosening element 100 can be prevented from rotating, and the anti-loosening element 100 can be prevented from falling off along the mounting direction of the nut 500; the first abutting surface 111 and the second abutting surface 112 of the abutting portion 110 abut against the outer wall of the nut 500, so that the nut 500 is prevented from rotating when the nut 500 has a tendency of rotating, and stable anti-loosening performance of the bolt connection auxiliary anti-loosening device 11 is achieved.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A bolt connection pair anti-loosening device is applied to a railway track and is characterized by comprising an anti-loosening piece (100), a bolt (400) and a nut (500);

the bolt (400) is used for sequentially passing through a component to be installed (20) and the anti-loosening element (100) and is matched with the nut (500);

the anti-loosening element (100) is used for being fixedly connected with the to-be-installed part (20), and the anti-loosening element (100) is matched with the outer wall of the nut (500) and abuts against the outer wall of the nut (500) under the condition that the nut (500) has a rotating trend so as to prevent the nut (500) from rotating.

2. The anti-loosening device for the bolt connection pair as claimed in claim 1, wherein the anti-loosening element (100) comprises a supporting part (110) and a fixing part (120), the fixing part (120) is connected with the supporting part (110), the fixing part (120) is used for being fixedly matched with an element to be installed (20), and the supporting part (110) corresponds to the outer wall of the nut (500) and is used for supporting the outer wall of the nut (500) under the condition that the nut (500) has a rotation tendency.

3. The anti-loosening device for the bolt connection pair as claimed in claim 2, wherein the abutting portion (110) has two first abutting surfaces (111) arranged oppositely, and the two first abutting surfaces (111) are respectively used for abutting against two side walls opposite to the nut (500).

4. The anti-loosening device for the bolt connecting pair as claimed in claim 3, wherein the abutting portion (110) has two second abutting surfaces (112) arranged at an included angle, the two second abutting surfaces (112) are connected with each other and are respectively connected with the first abutting surface (111), and the two second abutting surfaces (112) are respectively used for abutting against two adjacent side walls of the nut (500).

5. The screw connection pair looseness prevention device according to claim 2, wherein the screw connection pair looseness prevention device (11) further comprises a fixing member (200), the fixing member (200) is used for being fixedly connected with the to-be-installed member (20), and the looseness prevention member (100) is fixedly connected with the fixing member (200) through the fixing portion (120).

6. The anti-loosening device for the bolt connection pair as claimed in claim 5, wherein the anti-loosening device for the bolt connection pair (11) further comprises a split pin (300), the fixing portion (120) is provided with a first through hole (121), the fixing member (200) is convexly provided with a first convex block (220), the first convex block (220) is provided with a second through hole (221), and the split pin (300) penetrates through the first through hole (121) and the second through hole (221) to fixedly connect the fixing portion (120) and the first convex block (220).

7. The screw connection secondary anti-loosening device according to claim 6, wherein the fixing portion (120) is provided with a through groove (122) opening toward the fixing member (200), the first through hole (121) is provided on both side walls of the through groove (122), the first protrusion (220) can be inserted into the through groove (122), and the cotter pin (300) penetrates through the first through hole (121) and the second through hole (221) to fix the first protrusion (220) in the through groove (122).

8. The anti-loosening device for the bolt connection pair according to claim 5, wherein a second protruding block (230) is convexly arranged on the fixing member (200), the second protruding block (230) comprises a first limiting part (231) and a second limiting part (232), two ends of the first limiting part (231) are respectively connected with the fixing member (200) and the second limiting part (232), and the second limiting part (232) is oppositely arranged on the fixing member (200) to form a clamping groove (233);

the anti-loosening element (100) is provided with a clamping part (130), the clamping part (130) is connected with the abutting part (110), and the clamping part (130) can be embedded into the clamping groove (233) and is in clamping fit with the second bump (230).

9. The anti-loosening device for the bolt connection pair as claimed in claim 8, wherein the fixing member (200) is provided with a mounting hole (210) for the bolt (400) to pass through, the number of the second protrusions (230) comprises two, the fixing member (200) is convexly provided with a first protrusion (220), the two second protrusions (230) are arranged on two sides of the mounting hole (210) and are distributed in a triangular manner with the first protrusion (220), and the nut (500) can be screwed between the first protrusion (220) and the two second protrusions (230).

10. Partial structure of a railway switch, characterized in that it comprises a bolting pair anti-loosening device according to any of claims 1-9.