Locking mechanism for turnout bolt connection pair

Abstract

The turnout bolt connection pair anti-loosening mechanism comprises an anti-loosening base, an anti-loosening piece, a cotter pin and a bolt connection pair, and bent baffles are arranged at the left end and the right end of the anti-loosening base in the length direction; a base plate body of the anti-loose base is provided with a base boss; the base plate body is inserted, welded and fixedly connected with the T-shaped pin shaft; a base through hole is further formed in the base plate body; the upper side and the lower side of the anti-loosening piece in the height direction are provided with anti-loosening piece folding edges; at least two anti-rotating holes are formed in the anti-loosening sheet body; a pin shaft hole corresponding to the T-shaped pin shaft is formed in the anti-loosening sheet body; the T-shaped pin shaft penetrates through the pin shaft hole and then is provided with a retaining cotter pin; a large gasket is arranged between the inner side face of the cotter pin and the outer side face of the anti-loosening piece. The bolt connecting pair is composed of a bolt, a flat washer and a nut. According to the anti-loosening structure, the bending strength and the structural strength of the anti-loosening base in the anti-loosening structure are remarkably improved, the anti-fracture capacity of the anti-loosening structure is improved, meanwhile, cracking and falling of the T-shaped pin shaft can be eliminated, the shaking amplitude of the anti-loosening piece is limited, and the anti-falling capacity of the anti-loosening piece is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway track accessories, and in particular relates to a turnout bolt connection auxiliary anti-loosening mechanism. Background Art

[0002] During the service of the turnout, the high-frequency impact and vibration of the train wheels will cause the transverse bolts used to connect the rails to loosen, which will in turn affect the driving safety and track service life due to the instability of the track structure. Therefore, mechanical anti-loosening measures must be set for the connection of bolts and nuts.

[0003] At present, the main types of bolt and nut anti-loosening commonly used in my country's industry are as follows:

[0004] The first type: Figure 1 The double-hole or three-hole anti-loosening mechanism shown in the figure is composed of an outer anti-loosening plate, a split pin for preventing slipping, a positioning pile 15, and a base. The positioning pile 15 is welded to the base, and a round hole is opened on the base to insert the screw; a dodecagonal plum blossom hole is opened at the installation position of the hexagonal head of the nut or bolt to prevent rotation. The split pin is used to prevent the anti-loosening plate from falling off after installation. However, the positioning pile 15 of this structure is welded to the base of the thin plate, and the weld strength is insufficient and it is easy to fall off, and the anti-loosening plate is easy to fall off, which will cause the anti-loosening failure.

[0005] The second type: a single-hole anti-loosening piece structure, which is mainly composed of a base + an anti-loosening piece. The single-hole anti-loosening piece can only be inserted into the slot from top to bottom, and the position of the slot cannot be too high, resulting in a small overlap range between the anti-loosening piece and the slot. This design makes the anti-loosening piece easy to deform or fall off when subjected to external force, thus affecting the anti-loosening effect. Furthermore, due to the small overlap range, the anti-loosening piece may be deformed or fall off during long-term use due to the severe vibration of the train passing the switch, resulting in anti-loosening failure. It can be seen that the anti-loosening piece in the form of a single-hole anti-loosening piece is easy to deform and fall off, resulting in anti-loosening failure.

[0006] Furthermore, if Figures 2(a) to 2(d) The single hole anti-loosening mechanism with a dodecagonal anti-loosening snap ring is shown. In this type of anti-loosening structure design, the dodecagonal anti-loosening snap ring is easy to rotate along the cotter pin and fall off the nut, resulting in anti-loosening failure.

[0007] The third type is the anti-loosening form of the gusset plate structure, such as Figures 3(a) to 3(d) The anti-loosening structure of the gusset plate structure shown is mainly composed of a U-shaped base, a U-shaped anti-loosening sheet and a split pin. After the integrally formed flange of the U-shaped base passes through the insertion hole of the U-shaped anti-loosening sheet, the split pin is used to prevent the U-shaped anti-loosening sheet from falling off, thereby achieving the overall anti-loosening requirements for the bolt connection pair. However, the U-shaped base of this structural design is relatively wide. When used for 60AT2 rails, it will invade the range of the turnout wheel flange groove, increase the potential safety hazard of driving, and has poor adaptability.

[0008] Fourthly, a loosening prevention device for a sheet metal structure disclosed in the patent with the publication number CN220600209U mainly consists of a base, a cover plate and a split pin, all of sheet metal structure. There are two right-angle bends in the middle of the base of the sheet metal structure, which are used as flanges for positioning the cover plate, and two split pin mounting holes are provided on the flanges. However, this structure still has problems such as insufficient strength, easy fracture and easy loosening due to shaking. In addition, during the pre-tightening process of the bolt pair, the base is also prone to problems such as folding deformation.

[0009] It can be seen that the loosening prevention structures for turnout bolt connections in the prior art generally have problems such as insufficient bending strength of the existing loosening prevention structures, easy fracture and easy loosening. In response to this, the following improved technical solutions are proposed. Summary of the Invention

[0010] The technical problem solved by the present invention: Provide a loosening prevention mechanism for a turnout bolt connection pair to solve the problems of insufficient bending strength, easy fracture and easy loosening of the loosening prevention structure for the turnout bolt connection pair.

[0011] The technical solution adopted by the present invention: A loosening prevention mechanism for a turnout bolt connection pair includes a loosening prevention base, a loosening prevention sheet, a split pin and a bolt connection pair. Bending baffles are provided at the left and right ends in the length direction of the loosening prevention base. A base boss is formed on the base plate of the loosening prevention base. A T-shaped pin shaft is inserted and fixedly welded to the base plate. A base through hole is also formed on the base plate. Loosening prevention sheet flanges are provided on the upper and lower sides in the height direction of the loosening prevention sheet. At least two anti-rotation holes are formed on the sheet body of the loosening prevention sheet. A pin shaft hole corresponding to the T-shaped pin shaft is formed on the sheet body of the loosening prevention sheet. A retaining split pin is installed after the T-shaped pin shaft passes through the pin shaft hole. A large washer is provided between the inner side of the split pin and the outer side of the loosening prevention sheet. The bolt connection pair consists of a bolt, a flat washer and a nut.

[0012] In the above technical solution, as a further improvement of the present invention: The loosening prevention mechanism for the turnout bolt connection pair includes a nut-side loosening prevention mechanism and a bolt-side loosening prevention mechanism. The nut-side loosening prevention mechanism and the bolt-side loosening prevention mechanism can be used simultaneously or unilaterally. Both the nut-side loosening prevention mechanism and the bolt-side loosening prevention mechanism are composed of the loosening prevention base, the loosening prevention sheet, the large washer and the split pin.

[0013] In the above technical solution, as a preferred technical solution of the present invention: A φ20mm retaining table is formed at the large end of the T-shaped pin shaft, and a pin shaft body with a diameter of φ15 - 17mm is formed at the small end of the T-shaped pin shaft.

[0014] In the above technical solution, as a preferred technical solution of the present invention: The T-shaped pin shaft passes through a pin shaft round hole formed in the center of the base boss and is in close contact with the base boss, and the T-shaped pin shaft and the base boss are fixedly welded at the close contact position.

[0015] In the above technical solution, as a further improvement of the present utility model: the anti-rotation holes formed in the anti-loosening sheet are used for preventing the rotation of bolts and nuts; the anti-rotation holes are twelve-sided anti-rotation holes; the circumference of the anti-rotation holes has an adjustable amount of 0.5 mm more than the circumference of the hexagonal edges of the bolts or nuts of the bolt connection pair; the circumference of the anti-rotation holes has an adjustable amount of 1 mm more than the circumference of the hexagonal edges of the bolts or nuts of the bolt connection pair in the horizontal direction.

[0016] In the above technical solution, as a further improvement of the present utility model: all sharp corners of the anti-rotation holes are provided with rounded corners of R2 - 3 mm.

[0017] In the above technical solution, as a preferred technical solution of the present utility model: the anti-loosening base and the anti-loosening sheet are both formed by stamping; the holes of the anti-loosening base and the anti-loosening sheet are all made by wire cutting.

[0018] In the above technical solution, as a preferred technical solution of the present utility model: the plate bodies of the anti-loosening base and the anti-loosening sheet are made of stainless steel plate bodies with a thickness of not less than 3 mm.

[0019] In the above technical solution, as a preferred technical solution of the present utility model: the width of the anti-loosening sheet fold of the anti-loosening sheet is 8 - 10 mm.

[0020] In the above technical solution, as a preferred technical solution of the present utility model: the outer diameter of the large gasket is φ50 - 60 mm.

[0021] Advantages of the present utility model compared with the prior art:

[0022] 1. The present utility model can significantly improve the bending strength and structural strength of the anti-loosening base in the anti-loosening structure, improve the anti-fracture ability of the anti-loosening mechanism, and at the same time eliminate the cracking and falling off of the pin T-shaped pin shafts, limit the shaking amplitude of the anti-loosening sheet, and improve the anti-detachment ability of the anti-loosening sheet.

[0023] 2. The overall mechanism of the present utility model has relatively few parts, a simple structure, relatively low manufacturing costs for each component, does not affect the use of existing bolt connection pairs, has a more stable anti-loosening effect, and strong versatility.

[0024] 3. The anti-loosening mechanism of the turnout bolt connection pair of the present utility model is mainly composed of a nut-side anti-loosening mechanism and a bolt-side anti-loosening mechanism, which are respectively used for anti-loosening on the nut side and the bolt side of the bolt connection pair to prevent the rotation of the nut and the bolt, so as to play the role of anti-loosening of the bolt connection pair; each side of the anti-loosening mechanism is composed of an anti-loosening base, an anti-loosening sheet, a large gasket, and an open pin; at the same time, when the nut-side anti-loosening mechanism and the bolt-side anti-loosening mechanism of this anti-loosening mechanism are used alone, they can also play the role of anti-loosening of the bolt connection pair.

[0025] 4. The anti-loosening base of the present utility model is used for the overall support of the anti-loosening mechanism and is arranged at the innermost side of the bolt connection pair. Both ends of the anti-loosening base are bent to form bent baffles to block the shaking of the anti-loosening piece. A bent base boss is arranged in the middle of the anti-loosening base to improve the bending strength of the anti-loosening base.

[0026] 5. The T-shaped pin shaft structure of the present utility model combines the actions of insertion and welding fixation, making the connection between the anti-loosening base and the T-shaped pin shaft more firm and reliable, and completely eliminating problems such as pin shaft cracking and falling off.

[0027] 6. Both edges in the height direction of the anti-loosening piece of the present utility model are flanged to form anti-loosening piece flanges, increasing the material width at the weakest part of the anti-rotation hole of the anti-loosening piece. At the same time, the flanging treatment of the anti-loosening piece improves the overall bending strength of the anti-loosening piece.

[0028] 7. The anti-loosening piece of the present utility model has a twelve-sided anti-rotation hole, with adjustable amounts of 0.5 mm and 1 mm, as well as a rounded corner design, solving the problem that the insufficient screwing space of the bolt connection pair affects the installation. It can be not affected by the installation deviation of the bolt connection pair, making the installation of the anti-loosening piece more convenient and having better adaptability; the rounded corner design improves the anti-fracture ability at the anti-rotation hole.

[0029] 8. Both the anti-loosening base and the anti-loosening piece of the present utility model are formed by stamping. The holes of the anti-loosening base and the anti-loosening piece are made by wire cutting, and both are manufactured by the current mature manufacturing methods, with high manufacturing precision and low manufacturing cost.

[0030] 9. The large gasket with an outer diameter of φ50 - 60 mm of the present utility model can significantly increase the contact area between the large gasket and the anti-loosening piece, further restricting the shaking amplitude of the anti-loosening piece and improving the anti-detachment ability of the anti-loosening piece.

[0031] 10. The present utility model solves the problems of insufficient bending strength, easy fracture, and easy loosening of the anti-loosening structure of the turnout bolt connection pair. It has a simple structure, a mature manufacturing process, and convenient installation, and is suitable for popularization. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is the front view of the double-hole or triple-hole anti-loosening mechanism structure under the prior art;

[0033] Figure 2(a) is the front view of the base of the single-hole anti-loosening mechanism under the prior art;

[0034] Figure 2(b) is the left view of Figure 2(a) under the prior art;

[0035] Figure 2(c) is the front view of the twelve-sided anti-loosening snap ring of the single-hole anti-loosening mechanism under the prior art;

[0036] Figure 2(d) is the top view of Figure 2(c) under the prior art;

[0037] Figure 3(a) is the front view of the U-shaped base of the snap-type anti-loosening structure in the prior art;

[0038] Figure 3(b) is the side view of Figure 3(a) in the prior art;

[0039] Figure 3(c) is the front view of the U-shaped anti-loosening piece of the snap-type anti-loosening structure in the prior art;

[0040] Figure 3(d) is the side view of Figure 3(c) in the prior art;

[0041] Figure 4 This is the exploded view of the anti-loosening mechanism on the nut side of the present invention;

[0042] Figure 5 This is the present invention Figure 4 The combined state diagram of the anti-loosening mechanism on the nut side;

[0043] Figure 6 This is the exploded view of the anti-loosening mechanism on the bolt side of the present invention;

[0044] Figure 7 This is the present invention Figure 6 The combined state diagram of the anti-loosening mechanism on the bolt side;

[0045] Figure 8(a) is the three-dimensional view of the anti-loosening piece of the present invention;

[0046] Figure 8(b) is the front view of the anti-loosening piece of the present invention;

[0047] Figure 8(c) is the side view of the anti-loosening piece of the present invention;

[0048] Figure 9(a) is the three-dimensional view of the anti-loosening base of the present invention;

[0049] Figure 9(b) is the front view of the anti-loosening base of the present invention;

[0050] Figure 9(c) is the bottom view of the anti-loosening base of the present invention;

[0051] Figure 10 This is the front view of the T-shaped pin shaft of the present invention;

[0052] Figure 11 This is the three-dimensional view of the T-shaped pin shaft of the present invention;

[0053] Figure 12 This is the enlarged parameter diagram of the anti-rotation hole of the present invention;

[0054] Figure 13 This is the front view of the large gasket of the present invention;

[0055] Figure 14 This is the side view of the large gasket of the present invention;

[0056] Figure 15This is an exploded view of the three-hole anti-loosening mechanism on the nut side of the utility model;

[0057] Figure 16 This is a diagram showing the combined state of the three-hole anti-loosening mechanism on the nut side of the utility model;

[0058] In the figure: 1-rail, 2-bolt, 3-flat washer, 4-nut; 11-anti-loosening base, 12-anti-loosening sheet, 13-large washer, 14-cotter pin; 11-1 base plate, 11-2 T-shaped pin, 11-21 baffle, 11-22 pin shaft body; 11-3 bent baffle, 11-4 base boss, 11-5 base through hole; 12-1 anti-rotation hole, 12-2 anti-loosening sheet folded edge, 12-3 pin shaft hole; 12-1-1 0.5mm adjustable amount, 12-1-2 1mm adjustable amount, 12-2-3 fillet, 15-positioning pile. DETAILED DESCRIPTION

[0059] The following will be combined with the attached embodiment of the utility model Figures 4 - 16 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0060] (like Figure 4 , Figure 6 , Figure 15 The invention discloses a turnout bolt connection pair anti-loosening mechanism, comprising an anti-loosening base 11, an anti-loosening sheet 12, a cotter pin 14 and a bolt connection pair. The bolt connection pair is composed of a bolt 2, a flat washer 3 and a nut 4, so that the anti-loosening mechanism can be universally used including the existing bolt connection pair.

[0061] The first core improvement of the present invention is that: bending baffles 11-3 are provided at the left and right ends of the anti-loosening base 11 in the length direction; and anti-loosening sheet folding edges 12-2 are provided at the upper and lower sides of the anti-loosening sheet 12 in the height direction. Preferably: the bending baffles 11-3 and the anti-loosening sheet folding edges 12-2 are formed integrally with the anti-loosening base 11 and the anti-loosening sheet 12 respectively. The bending baffles 11-3 are formed by raising and bending the two ends of the anti-loosening base 11 to prevent the shaking of the anti-loosening sheet 12. Furthermore, the two edges of the anti-loosening sheet 12 in the height direction of the present invention are folded to form anti-loosening sheet folding edges 12-1. The anti-loosening sheet folding edges 12-1 are used to increase the material width at the weakest part of the anti-rotation hole 12-1 of the anti-loosening sheet 12. At the same time, the folding of the anti-loosening sheet is processed to improve the overall bending strength of the anti-loosening sheet 12, and the structure is compact.

[0062] The second core improvement of the present utility model lies in that: the base plate body 11-1 of the anti-loosening base 11 is provided with a base boss 11-4; the base boss 11-4 is used to improve the bending strength of the anti-loosening base. The base plate body 11-1 preferably has a T-shaped pin shaft 11-2 inserted and fixedly connected by welding at the center of the base boss 11-4; the combined action of inserting and welding and fixing connection of the T-shaped pin shaft 11-2 makes the connection between the anti-loosening base 11 and the T-shaped pin shaft 11-2 more firm and reliable, and can completely eliminate problems such as pin shaft cracking and falling off.

[0063] Correspondingly: (as shown in Figures 8 and 9) the base plate body 11-1 is further provided with a base through hole 11-5; the body of the anti-loosening piece 12 is provided with at least two anti-rotation holes 12-1; the body of the anti-loosening piece 12 is provided with a pin shaft hole 12-3 corresponding to the T-shaped pin shaft 11-2; after the T-shaped pin shaft 11-2 passes through the pin shaft hole 12-3, a split pin 14 for anti-retreat is installed at the end of the T-shaped pin shaft 11-2.

[0064] The third core improvement of the present utility model lies in that: a large gasket 13 is provided between the inner side surface of the split pin 14 and the outer side surface of the anti-loosening piece 12 (in combination Figure 5 , Figure 7 , Figure 16 ). The present utility model adds a large gasket 13, which can significantly increase the contact area between the large gasket 13 and the anti-loosening piece 12, further limit the shaking amplitude of the anti-loosening piece 12, and thus improve the anti-detachment ability of the anti-loosening piece 12.

[0065] It should be noted that: First of all, the anti-loosening base 11 of the present utility model is used for the overall support of the anti-loosening mechanism, is arranged on the innermost side of the bolt connection pair, the two ends of the anti-loosening base 11 are bent to form a bent baffle 11-3 to block the shaking of the anti-loosening piece 12, and a bent base boss 11-4 is arranged in the middle of the anti-loosening base 11 to improve the bending strength of the anti-loosening base.

[0066] Secondly, the structure of the T-shaped pin shaft 11-2 of the present utility model, combined with the combined action of inserting and welding and fixing connection, makes the connection between the anti-loosening base 11 and the T-shaped pin shaft 11-2 more firm and reliable, and can completely eliminate problems such as pin shaft cracking and falling off.

[0067] Furthermore, both edges of the anti-loosening piece 12 in the height direction are subjected to hemming treatment to form anti-loosening piece hems 12-2, which increases the material width at the weakest part of the anti-rotation hole of the anti-loosening piece 12. At the same time, the hemming treatment of the anti-loosening piece hems 12-2 improves the overall bending strength of the anti-loosening piece 12.

[0068] In the above embodiment, as a further improved embodiment of the present utility model: the anti-loosening mechanism of the turnout bolt connection pair includes a nut-side anti-loosening mechanism (as Figure 4 , Figure 5 shown), and also includes a bolt-side anti-loosening mechanism (asFigure 6 , Figure 7 As shown in the figure. The anti-loosening mechanism on the nut side and the anti-loosening mechanism on the bolt side can be used simultaneously or on one side only. Both the anti-loosening mechanism on the nut side and the anti-loosening mechanism on the bolt side are composed of the anti-loosening base 11, the anti-loosening piece 12, the large washer 13, and the split pin 14.

[0069] It should be understood that: The anti-loosening mechanism of the turnout bolt connection pair of the present utility model mainly includes the anti-loosening mechanism on the nut side and the anti-loosening mechanism on the bolt side, which are respectively used for anti-loosening on the nut side and the bolt side of the bolt connection pair, to prevent the rotation of the nut and the bolt, so as to play the role of anti-loosening of the bolt connection pair; Each side's anti-loosening mechanism is composed of the anti-loosening base 11, the anti-loosening piece 12, the large washer 13, and the split pin 14; At the same time, when the anti-loosening mechanism on the nut side and the anti-loosening mechanism on the bolt side of this anti-loosening mechanism are used alone, they can also play the role of anti-loosening of the bolt connection pair.

[0070] In the above embodiment, as a preferred embodiment of the present utility model: (as shown in Figure 10 , Figure 11 ) The large end of the T-shaped pin 11-2 is provided with a stop platform 11-21 with a diameter of φ20mm; The small end of the T-shaped pin 11-2 is provided with a pin shaft body 11-22 with a diameter of φ15 - 17mm. In the above embodiment, as a preferred embodiment of the present utility model: The T-shaped pin 11-2 passes through the pin hole formed in the center of the base boss 11-4 and is in close contact with the base boss 11-4, and the T-shaped pin 11-2 and the base boss 11-4 are fixedly connected by welding at the close contact position. The combined action of the T-shaped pin 11-2 and the fitting and welding connection structure after insertion makes the connection between the anti-loosening base 11 and the T-shaped pin 11-2 more firm and reliable, and can completely eliminate problems such as pin cracking and falling off.

[0071] In the above embodiment, as a further improved embodiment of the present utility model: The anti-rotation hole 12-1 formed in the anti-loosening piece 12 is used to prevent the rotation of the bolt 2 and the nut 4; The anti-rotation hole 12-1 is a twelve-sided anti-rotation hole. (As shown in Figure 12 ) The circumference of the anti-rotation hole 12-1 has an adjustable amount of 0.5mm 12-1-1 more than the circumference of the hexagonal edge of the bolt 2 or the nut 4 of the bolt connection pair; The circumference of the anti-rotation hole 12-1 has an adjustable amount of 1mm 12-1-2 more than the circumference of the hexagonal edge of the bolt 2 or the nut 4 of the bolt connection pair in the horizontal direction. In the above embodiment, as a further improved embodiment of the present utility model: All sharp corners of the anti-rotation hole 12-1 are provided with rounded corners 12-2-3 with a radius of R2 - 3mm.

[0072] It should be noted that the anti-loosening piece 12 of the present utility model is designed with twelve anti-rotation holes, an adjustable amount of 0.5 mm (12-1-1), an adjustable amount of 1 mm (12-1-2), and a fillet with a radius of R2-3 mm (12-2-3). This solves the problem that the tightening space of the bolt connection pair is insufficient and affects the installation. It can be not affected by the installation deviation of the bolt connection pair, making the installation of the anti-loosening piece 12 more convenient and having better adaptability. The fillet design improves the anti-fracture ability at the anti-rotation hole 12-1.

[0073] In the above embodiment, as a preferred embodiment of the present utility model: both the anti-loosening base 11 and the anti-loosening piece 12 are formed by stamping; the holes of the anti-loosening base 11 and the anti-loosening piece 12 are all made by wire cutting.

[0074] It should be noted that: both the anti-loosening base 11 and the anti-loosening piece 12 of the present utility model are formed by stamping, and the holes of the anti-loosening base and the anti-loosening piece are all made by wire cutting. They are all manufactured by current mature manufacturing methods, with high manufacturing precision and low manufacturing cost.

[0075] In the above embodiment, as a preferred embodiment of the present utility model: the plate bodies of the anti-loosening base 11 and the anti-loosening piece 12 are made of stainless steel plate bodies with a thickness of not less than 3 mm. In the above embodiment, as a preferred embodiment of the present utility model: the width of the anti-loosening piece fold 12-2 formed on the anti-loosening piece 12 is 8-10 mm.

[0076] In the above embodiment, as a preferred embodiment of the present utility model: (as Figure 13 , Figure 14 shown) the outer diameter of the large washer 13 is φ50-60 mm. The large washer 13 with an outer diameter of φ50-60 mm in the present utility model can significantly increase the contact area between the large washer 13 and the anti-loosening piece 12, further limit the swaying amplitude of the anti-loosening piece 12, and improve the anti-disengagement ability of the anti-loosening piece 12.

[0077] When the present utility model is in use: first, pass the bolt 2 and the bolt-side flat washer 3 through the anti-loosening base 11 to form a pre-assembled body, then pass it through the bolt hole of the rail 1, and then install the nut-side anti-loosening base 11, flat washer 3, and nut 4 to pre-tighten the bolt connection pair to achieve single-sided anti-loosening. Or first install the bolt-side anti-loosening piece 12, large washer 13, and split pin 14, and then install the nut-side anti-loosening piece 12, large washer 13, and split pin 14 to form double-sided anti-loosening. This anti-loosening mechanism can be used alone on the nut side or the bolt side, or can be used on both the nut side and the bolt side at the same time. At the same time, it can be foreseen that this structure can not only be applied to two-hole bolt connection pairs, but can also be used for bolt connection pairs with multiple holes of more than two holes.

[0078] Through the above description, it can be found that: the present utility model effectively solves the problems of insufficient bending strength, easy fracture, and easy loosening and disengagement of the anti-loosening structure of the turnout bolt connection pair.

[0079] In summary, the utility model can significantly improve the bending strength and structural strength of the anti-loosening base in the anti-loosening structure, enhance the anti-fracture ability of the anti-loosening mechanism, eliminate the cracking and falling off of the pin T-shaped pin shaft 11-2, limit the swaying amplitude of the anti-loosening piece 12, and improve the anti-disengagement ability of the anti-loosening piece 12. In addition, the overall mechanism of the utility model has relatively few parts, a simple structure, relatively low manufacturing costs for each component, does not affect the use of the existing bolt connection pair, has a more stable anti-loosening effect, and strong versatility. Therefore, the overall structure of the utility model is simple, the manufacturing process is mature, the installation is convenient, and it is suitable for popularization.

[0080] It should be understood that although this specification is mainly described according to one embodiment, this embodiment does not only contain an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in this embodiment can also be appropriately arranged and combined to form other embodiments that can be understood by those skilled in the art.

[0081] The preferred embodiments in the utility model are not used to limit the scope of implementation of the utility model. Therefore, all equivalent changes made according to the content described in the claims of the utility model should be included within the scope of the claims of the utility model; it should be noted that: the components and materials used in the above embodiments are commercially available unless otherwise specified.

Claims

1. A turnout bolt connection pair anti-loosening mechanism, comprising an anti-loosening base (11), an anti-loosening sheet (12), a cotter pin (14) and a bolt connection pair, characterized in that: The anti-loosening base (11) is provided with bent baffles (11-3) at the left and right ends in the length direction; the anti-loosening base (11) has a base plate (11-1) provided with a base boss (11-4); the base plate (11-1) is inserted through and welded to a fixed connection with a T-shaped pin shaft (11-2); the base plate (11-1) is also provided with a base through hole (11-5); the anti-loosening plate (12) is provided with anti-loosening plate folding edges (12-2) at the upper and lower sides in the height direction; the anti-loosening plate (12) is provided with a base boss (11-4); ...1-1) is provided with a base boss (11-4); the anti-loosening plate (11-1) is provided with a base boss (11-4); the anti-loosening plate (11-1) is provided with a base boss (11-4); the anti-loosening plate (11-1) is provided with a base boss (11-4); the anti-loosening plate (11-1) is provided with a base boss (11-4); the anti-loosening plate (11-1) is provided with a base boss (11-4); the anti-loosening plate (11-1) is The sheet (12) is provided with at least two anti-rotation holes (12-1); the anti-loosening sheet (12) is provided with a pin shaft hole (12-3) corresponding to the T-shaped pin shaft (11-2); a retaining cotter pin (14) is installed after the T-shaped pin shaft (11-2) passes through the pin shaft hole (12-3); a large gasket (13) is provided between the inner side surface of the cotter pin (14) and the outer side surface of the anti-loosening sheet (12); and the bolt connection pair is composed of a bolt (2), a flat washer (3), and a nut (4).

2. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1, characterized in that: The turnout bolt connection auxiliary anti-loosening mechanism comprises a nut side anti-loosening mechanism and a bolt side anti-loosening mechanism; the nut side anti-loosening mechanism and the bolt side anti-loosening mechanism are used simultaneously or unilaterally; the nut side anti-loosening mechanism or the bolt side anti-loosening mechanism is composed of the anti-loosening base (11), the anti-loosening plate (12), the large gasket (13), and the cotter pin (14).

3. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1, characterized in that: The large end of the T-shaped pin shaft (11-2) is provided with a stopper (11-21) with a diameter of 20 mm; the small end of the T-shaped pin shaft (11-2) is provided with a pin shaft body (11-22) with a diameter of 15 to 17 mm.

4. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1 or 3, characterized in that: The T-shaped pin shaft (11-2) passes through a pin shaft circular hole formed at the center of the base boss (11-4) and is closely attached to the base boss (11-4), and the T-shaped pin shaft (11-2) and the base boss (11-4) are fixedly connected by welding at the closely attached position.

5. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1 or 2, characterized in that: The anti-rotation hole (12-1) formed on the anti-loosening plate (12) is used to prevent the bolt (2) and the nut (4) from rotating. The anti-rotation hole (12-1) is a twelve-sided anti-rotation hole. The hole circumference of the anti-rotation hole (12-1) is 0.5 mm larger and adjustable (12-1-1) than the hexagonal edge circumference of the bolt (2) or the nut (4) of the bolt connection pair. The hole circumference of the anti-rotation hole (12-1) is 1 mm larger and adjustable (12-1-2) in the horizontal direction than the hexagonal edge circumference of the bolt (2) or the nut (4) of the bolt connection pair.

6. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 5, characterized in that: All sharp corners of the anti-rotation hole (12-1) are formed with R2-3 mm rounded corners (12-2-3).

7. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1 or 2, characterized in that: The anti-loosening base (11) and the anti-loosening sheet (12) are both formed by stamping; the holes of the anti-loosening base (11) and the anti-loosening sheet (12) are both made by wire cutting.

8. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 7, characterized in that: The anti-loosening base (11) and the anti-loosening sheet (12) are made of a stainless steel plate with a thickness of not less than 3 mm.

9. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1, 2 or 8, characterized in that: The width of the anti-loosening sheet folding edge (12-2) of the anti-loosening sheet (12) is 8 to 10 mm.

10. The turnout bolt connection auxiliary anti-loosening mechanism according to claim 1 or 2, characterized in that: The outer diameter of the large gasket (13) is φ50-60 mm.

Images