A loosening prevention device for brake rail bolts

Abstract

The present invention discloses a loosening prevention device for a brake rail bolt, which is used to connect a brake caliper and a brake rail, and includes a loosening prevention plate; the brake rail is provided with multiple pairs of brake rail through holes; each pair of brake rail through holes is respectively connected to the left end of a brake caliper; a pair of brake caliper through holes is provided at the position corresponding to the brake rail through holes at the left end of each brake caliper; for each brake caliper, after two hexagon head bolts with holes in the head respectively pass through the central through hole of a spring washer, a brake rail through hole on the brake rail and a brake caliper through hole on the brake caliper, they are connected to an anti-rotation nut; the lower parts of the outer hexagons of the nuts of the two hexagon head bolts with holes in the head and the upper outer sides of the two spring washers are sleeved with the same loosening prevention plate; an opening pin is inserted into the nut of each bolt; the bottom of the opening pin is in tight contact with the top surface of the loosening prevention plate. The present invention can significantly improve the loosening prevention effect of the hexagon head bolts with holes in the head for connecting the brake rail and the brake caliper of a vehicle retarder, and ensure the connection reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of gravity vehicle retarders in railway hump marshalling yards, and particularly to a loosening prevention device for brake rail bolts. Background Art

[0002] Currently, for railway hump marshalling yards, the brake rail of the gravity vehicle retarder is fixed to the brake caliper by installing bolts up and down. Due to the upper limit restriction of the vehicle retarder, the brake rail bolts can only be installed from top to bottom. The installation sequence is, in turn, the brake rail bolts, spring washers, brake rails, brake calipers, and anti-rotation nuts.

[0003] Among them, the anti-rotation nut is a rectangular or square nut. The loosening prevention measure for the brake rail bolts and the anti-rotation nuts is generally that the last few threads of the internal thread in the anti-rotation nut are deformed threads, so as to increase the pre-tightening friction force between the brake rail bolts and the internal thread in the anti-rotation nut, thereby achieving the effect of loosening prevention.

[0004] However, this friction-based loosening prevention method has low reliability, unstable loosening prevention effect, and low service life. Currently, during the use of gravity vehicle retarders, as the brake rails wear, it is necessary to regularly adjust the opening of the brake rails. Each time the adjustment is made, the brake rail bolts need to be tightened and loosened. Generally, for the brake rails in the destination braking position, it needs to be adjusted at least once every six months, and for the brake rails in the interval braking position, it needs to be adjusted at least once every half month. Due to the poor loosening prevention effect of the existing brake rail bolts, the loosening prevention effect cannot be guaranteed after several tightenings and loosenings, and individual brake rail bolts loosen every day, resulting in a large amount of time being spent by railway maintenance personnel to tighten the brake rail bolts. For example, during the 40 - 60 minutes of wheel-stop repair time every day, most of the time is used to tighten the brake rail bolts.

[0005] In addition, for the brake rails in the destination braking position, although they are not used frequently, if the above-mentioned existing friction-based loosening prevention method is adopted, some bolts are also prone to loosening. Moreover, since the frequency of adjusting the opening of the brake rails for the retarders in the destination braking position is relatively low, the brake rail bolts that have not loosened are prone to rust after six months or even a longer time, resulting in the inability to loosen the brake rail bolts when adjusting the opening of the brake rails again, and only by destructive means can the brake rail bolts be disassembled. For example, only by using gas cutting to damage the bolt heads of the brake rail bolts can the brake rail bolts be disassembled. There is also a problem on-site that the spring washers are damaged and detached, and the disappearance of the bolt pre-tightening force is also likely to cause the bolts to loosen.

[0006] In addition, since the brake rail bolts are prone to loosening, after the anti-rotation nut falls off, vibrations are generated during the braking and release of the vehicle retarder. The nuts of the brake rail bolts jump upward, and occasionally the bolts get stuck in the brake calipers or the brake rail bolt holes, and the nuts are separated from the upper surface of the brake rail by a certain distance, often exceeding the lower limit of the locomotive and rolling stock, resulting in incidents where the nuts scrape against the vehicle and the locomotives at the lower hump. Similar problems have occurred at some stations. Summary of the Invention

[0007] The object of the present invention is to provide an anti-loosening device for brake rail bolts in view of the technical defects existing in the prior art.

[0008] To this end, the present invention provides an anti-loosening device for brake rail bolts, which is used to connect a plurality of brake calipers and any brake rail. The device includes an anti-loosening plate, a hexagon head bolt with a hole, an anti-rotation nut, a spring washer and an open pin;

[0009] Among them, for the longitudinally distributed brake rail, a plurality of pairs of vertically penetrating brake rail through holes are arranged at intervals from front to back;

[0010] Each pair of brake rail through holes is respectively connected to the left end of a laterally distributed brake caliper;

[0011] Among them, at the position corresponding to the brake rail through hole at the left end of each brake caliper, a pair of vertically penetrating brake caliper through holes spaced front and back are provided;

[0012] For each brake caliper, two hexagon head bolts with holes respectively pass through the central through hole of a spring washer, a brake rail through hole on the brake rail and a brake caliper through hole on the brake caliper from top to bottom in sequence, and the lower ends thereof are respectively threadedly fixed to an anti-rotation nut;

[0013] Among them, the lower part of the six-sided periphery of the nuts of the two hexagon head bolts with holes and the outer sides of the upper middle parts of the two spring washers are sleeved with the same anti-loosening plate;

[0014] Among them, each nut of the hexagon head bolt with a hole is provided with a laterally penetrating through hole of the nut;

[0015] An open pin is respectively inserted into each laterally penetrating through hole of the nut;

[0016] The bottom of the open pin is in tight contact with the top surface of the anti-loosening plate.

[0017] Preferably, the anti-loosening plate includes an anti-loosening bottom plate and an anti-rotation plate;

[0018] The anti-loosening bottom plate is longitudinally distributed;

[0019] At the front, rear, left and right ends of the anti-loosening bottom plate, an anti-loosening head is respectively provided;

[0020] The two anti-loosening heads are symmetrically distributed front and back;

[0021] An anti-rotation plate is provided on the top of each anti-loosening head;

[0022] Wherein, an anti-rotation tooth through hole is provided at the center position of the anti-rotation plate;

[0023] The edges around the anti-rotation tooth through hole are provided with a plurality of anti-rotation tooth grooves;

[0024] Each anti-loosening head is provided with an anti-loosening head through hole at a position directly below the anti-rotation tooth through hole;

[0025] Among them, the anti-rotation thread through hole is used to be sleeved on the outer side of the hexagon of the nut on the top of the bolt with a hole on the hexagonal head;

[0026] The anti-loosening head through hole on the anti-loosening head is used to place the middle and upper part of the spring washer;

[0027] The bottom of the cotter pin is in tight contact with the top surface of the anti-rotation plate.

[0028] Preferably, the anti-loosening plate further comprises: an anti-rotation shaft;

[0029] Wherein, a first anti-rotation shaft installation through hole is respectively opened at the middle of the front and rear ends of each anti-rotation plate;

[0030] Each anti-rotation plate is connected to an anti-loosening head in the anti-loosening bottom plate via two anti-rotation shafts penetrating through two first anti-rotation shaft mounting through holes.

[0031] Preferably, each anti-rotation shaft passes through the second anti-rotation shaft installation through hole reserved on the anti-loosening head of the anti-loosening bottom plate and a first anti-rotation shaft installation through hole reserved on the anti-rotation plate from bottom to top, and then the anti-loosening bottom plate and the anti-rotation plate are riveted together.

[0032] Preferably, the second anti-rotation shaft mounting through hole is an elongated through hole.

[0033] Preferably, the anti-rotation shaft is provided with an anti-rotation shaft small diameter end portion, an anti-rotation shaft large diameter end portion and a shaft shoulder in sequence from top to bottom;

[0034] The upper part of the small diameter end portion of the anti-rotation shaft is provided with an anti-rotation shaft riveting hole with a top opening.

[0035] Preferably, the anti-loosening plate further comprises: a support column;

[0036] A support column is riveted to the left and right ends of the opposite sides of the two anti-loosening heads on the anti-loosening bottom plate.

[0037] Preferably, the support column is provided with a support column small diameter end portion and a support column large diameter end portion in sequence from top to bottom;

[0038] The upper part of the small diameter end of the support column is provided with a support column riveting hole with a top opening.

[0039] Preferably, an anti-rotation platform is provided at the middle position of the upper left end of the brake caliper;

[0040] The front and rear sides of the anti-rotation platform are respectively provided with anti-rotation nut accommodating notches;

[0041] Two anti-rotation nuts accommodate notches and have side walls only on the opposite and right sides;

[0042] The two anti-rotation nuts are respectively located in the two anti-rotation nut accommodating notches and are respectively in contact with the right side walls of the two anti-rotation nut accommodating notches.

[0043] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a brake rail bolt anti-loosening device, which has a scientific structural design and can significantly improve the anti-loosening effect of the hexagonal head bolt with a hole (i.e., brake rail bolt) used to connect the brake rail of the vehicle reducer and the brake caliper, thereby ensuring the connection reliability between the brake rail of the vehicle reducer and the brake caliper, and has great production practical significance.

[0044] Compared with the prior art, the brake rail bolt anti-loosening device provided by the present invention also has the following technical effects:

[0045] 1. After the hexagonal head bolt with a hole is tightened in place, there is no need to tighten or loosen the anti-loosening plate through the hexagonal head bolt with a hole, which saves installation time. The hexagonal head bolt with a hole does not need to be backed off after tightening, which increases the initial pre-tightening force of the hexagonal head bolt with a hole, making the anti-loosening effect of the hexagonal head bolt with a hole more obvious.

[0046] 2. The anti-loosening base plate is sleeved around the spring washer to prevent the spring washer from being damaged and detached, maintain the pre-tightening force of the brake rail bolt, and effectively prevent the hexagonal head bolt with a hole from loosening. Even if the spring washer is damaged, the spring washer does not need to be replaced before debugging, reducing the amount of on-site maintenance.

[0047] 3. The anti-loosening plate is placed above the brake rail. As long as the anti-loosening plate is installed well, the hexagonal head bolt with a hole will not be loosened. It is convenient to check the installation status of the hexagonal head bolt with a hole, and even remote video inspection can be carried out through video equipment, providing a good technical foundation for the detection equipment.

[0048] 4. The split pin hole is set on the bolt cap of the hexagonal head bolt with a hole, which improves the reliability of the connection.

[0049] 5. The installation of anti-loosening shaft and support column adopts riveting method, without welding, which further improves the reliability of connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1aA schematic diagram of the three-dimensional structure of a brake rail bolt anti-loosening device provided by the present invention, a brake caliper and a brake rail in an installed state;

[0051] Figure 1b A brake rail bolt anti-loosening device provided by the present invention, and a front view of the installation state of the brake caliper and the brake rail;

[0052] Figure 1c A brake rail bolt anti-loosening device provided by the present invention, and a left view of the installation state of the brake caliper and the brake rail;

[0053] Figure 1d A brake rail bolt anti-loosening device provided by the present invention, and a top view of the installation state of the brake caliper and the brake rail;

[0054] Figure 1e A schematic diagram of the three-dimensional structure of a brake caliper in a brake rail bolt anti-loosening device provided by the present invention;

[0055] Figure 1f A front view of a brake caliper in a brake rail bolt anti-loosening device provided by the present invention;

[0056] Figure 1g A top view of a brake caliper in a brake rail bolt anti-loosening device provided by the present invention;

[0057] Figure 1h A left side view of a brake caliper in a brake rail bolt anti-loosening device provided by the present invention;

[0058] Figure 1i A right side view of a brake caliper in a brake rail bolt anti-loosening device provided by the present invention;

[0059] Figure 1j A front cross-sectional view of a brake rail in a brake rail bolt anti-loosening device provided by the present invention;

[0060] Figure 1k A top view of a section of a brake rail in a brake rail bolt anti-loosening device provided by the present invention;

[0061] Figure 2a A front view of a brake rail bolt anti-loosening device provided by the present invention in an assembled state when not installed with a brake caliper and a brake rail;

[0062] Figure 2b A brake rail bolt anti-loosening device provided by the present invention is a left view of the assembled state when it is not installed with the brake caliper and the brake rail;

[0063] Figure 2c A top view of a brake rail bolt anti-loosening device provided by the present invention in an assembled state when not installed with a brake caliper and a brake rail;

[0064] Figure 3a A front view of an anti-loosening plate in a brake rail bolt anti-loosening device provided by the present invention;

[0065] Figure 3b A brake rail bolt anti-loosening device provided by the present invention, a left view of an anti-loosening plate;

[0066] Figure 3c A top view of a brake rail bolt anti-loosening device provided by the present invention, and an anti-loosening plate;

[0067] Figure 3d A top view of an anti-loosening bottom plate in an anti-loosening plate of a brake rail bolt anti-loosening device provided by the present invention;

[0068] Figure 3e A brake rail bolt anti-loosening device provided by the present invention, a left view of an anti-loosening bottom plate in an anti-loosening plate;

[0069] Figure 3f A top view of an anti-rotation plate in an anti-loosening plate of a brake rail bolt anti-loosening device provided by the present invention;

[0070] Figure 3g A brake rail bolt anti-loosening device provided by the present invention, a left view of an anti-rotation plate in an anti-loosening plate;

[0071] Figure 4 A schematic structural diagram of an anti-rotation shaft in an anti-loosening plate in a brake rail bolt anti-loosening device provided by the present invention;

[0072] Figure 5 A schematic structural diagram of a support column in an anti-loosening plate in a brake rail bolt anti-loosening device provided by the present invention;

[0073] In the figure, 101, brake caliper; 102, brake rail;

[0074] 1. Anti-loosening plate; 2. Hexagonal head bolt with hole; 3. Anti-rotation nut; 4. Spring washer; 5. Split pin; 6. Anti-rotation table;

[0075] 11. Anti-loosening bottom plate; 110. Second anti-rotation shaft installation through hole; 111. Anti-loosening head;

[0076] 12. anti-rotation plate; 120. anti-rotation tooth through hole; 121. anti-rotation tooth groove;

[0077] 13. anti-rotation shaft; 131. shaft shoulder; 132. large diameter end of the anti-rotation shaft; 133. small diameter end of the anti-rotation shaft; 134. riveting hole of the anti-rotation shaft;

[0078] 14. Support column; 141. Large diameter end of support column; 142. Small diameter end of support column; 143. Riveting hole of support column. DETAILED DESCRIPTION

[0079] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0080] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0081] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0082] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0083] See also Figures 1a to 5 The present invention provides a brake rail bolt anti-loosening device for connecting a plurality of brake calipers 101 and any brake rail 102, the device comprising an anti-loosening plate 1, a hexagonal head bolt with a hole 2, an anti-rotation nut 3, a spring washer 4 and a cotter pin 5;

[0084] The longitudinally distributed brake rail 102 is provided with a plurality of pairs of vertically penetrating brake rail through holes spaced from front to back;

[0085] Each pair of brake rail through holes is respectively connected to the left end of a laterally distributed brake caliper 101;

[0086] It should be noted that, for the present invention, each brake rail is installed with a plurality of brake calipers, and two brake rail through holes 1021 (i.e., a pair of brake rail through holes) are provided at the brake rail and each brake caliper;

[0087] The left end of each brake caliper 101 is provided with a pair of brake caliper through holes 1011 spaced apart from each other and vertically penetrating at positions corresponding to the brake rail through holes 1021;

[0088] For each brake caliper 101, two hexagonal head bolts 2 with holes are respectively passed through the central through hole of a spring washer 4, a brake rail through hole on the brake rail 102 and a brake caliper through hole on the brake caliper 101 from top to bottom, and the lower ends thereof are respectively threadedly fixedly connected with an anti-rotation nut 3;

[0089] Among them, the lower outer part of the hexagonal nut at the top of the two hexagonal head bolts 2 and the outer part of the middle and upper parts of the two spring washers are covered with the same anti-loosening plate 1;

[0090] Wherein, each nut (i.e., hexagonal nut) of the hexagonal head bolt 2 is provided with a nut transversely penetrating through hole;

[0091] Each nut passes through the through hole transversely and is respectively plugged with a cotter pin 5;

[0092] The bottom of the cotter pin 5 is in tight contact with the top surface of the anti-loosening plate 1.

[0093] In the present invention, in a specific implementation, the cross-sectional shape of the anti-rotation nut 3 is a rectangle.

[0094] In the present invention, in a specific implementation, the bottom of the brake rail 102 has a longitudinally distributed brake caliper left end connection portion accommodating groove 1020;

[0095] The brake caliper left end connection portion accommodating groove 1020 is used to accommodate the brake caliper left end connection portions 1010 provided at the left ends of the plurality of brake calipers 101;

[0096] A vertically penetrating brake caliper through hole 1011 is respectively provided at the front and rear ends of the left end connecting portion 1010 of the brake caliper;

[0097] The brake caliper through hole 1011 is arranged corresponding to the brake rail through hole 1021 on the brake rail 102 .

[0098] In the present invention, for specific implementation, see Figures 3a to 3c As shown, the anti-loosening plate 1 includes an anti-loosening bottom plate 11 and an anti-rotation plate 12;

[0099] The anti-loosening bottom plate 11 is distributed longitudinally;

[0100] The front and rear ends of the anti-loosening bottom plate 11 are respectively provided with an anti-loosening head 111;

[0101] The two anti-loosening heads 111 are symmetrically distributed front and back;

[0102] An anti-rotation plate 12 is provided on the top of each anti-loosening head 111;

[0103] Among them, an anti-rotation tooth through hole 120 is provided at the center position of the anti-rotation plate 12;

[0104] The edges around the anti-rotation tooth through hole 12 are provided with a plurality of anti-rotation tooth grooves 121;

[0105] Each anti-loosening head 111 is provided with an anti-loosening head through hole 1110 at a position directly below the anti-rotation tooth through hole 120;

[0106] The anti-rotation through hole 120 is used to be sleeved on the outer side of the hexagonal nut of the hexagonal head bolt 2;

[0107] The anti-loosening head through hole 1110 on the anti-loosening head 111 is used to place the middle and upper part of the spring washer 4;

[0108] The bottom of the cotter pin 5 is in tight contact with the top surface of the anti-rotation plate 12 .

[0109] It should be noted that the anti-rotation plate 12 is provided with an anti-rotation tooth through hole 120 for matching with the hexagonal head hole bolt 2, and the anti-rotation tooth through hole 120 has an anti-rotation tooth groove 121 similar to a plum blossom wrench.

[0110] In the present invention, in a specific implementation, the anti-loosening plate 1 further includes: an anti-rotation shaft 13;

[0111] A first anti-rotation shaft installation through hole 122 is respectively formed at the middle of the front and rear ends of each anti-rotation plate 12;

[0112] Each anti-rotation plate 12 is connected to an anti-loosening head 111 in the anti-loosening base plate 11 via two anti-rotation shafts 13 penetrating through two first anti-rotation shaft mounting through holes 122 .

[0113] For specific implementation, see Figure 4 Each anti-rotation shaft 13 passes through the second anti-rotation shaft mounting through hole 110 reserved on the anti-loosening base plate 11 (specifically on the anti-loosening head 111) and a first anti-rotation shaft mounting through hole 122 (a circular through hole) reserved on the anti-rotation plate 12 from bottom to top, and then the anti-loosening base plate 11 and the anti-rotation plate 12 are riveted together.

[0114] In a specific implementation, the second anti-rotation shaft mounting through hole 110 is an elongated through hole, and its transverse length is greater than the diameter of the anti-rotation shaft 13 . The anti-rotation shaft 13 can rotate left and right along the second anti-rotation shaft mounting through hole 110 at a certain angle.

[0115] It should be noted that due to the design of the second anti-rotation shaft mounting through hole 110 on the anti-loosening base plate 11, the anti-rotation plate 12 can be rotated on the anti-loosening base plate 11 by a certain angle, and the angle is approximately equal to the angle between the two teeth (i.e., the two anti-rotation tooth grooves 121 on the anti-rotation tooth through hole 120), so that when the nut of the brake rail bolt (i.e., the hexagonal head bolt with a hole 2) is tightened into place, even if the six corners of the nut of the hexagonal head bolt with a hole 2 are horizontally rotated to any position (i.e., the positions of the six corners can be in different position angles when the nut is tightened into place, for example, when the upper and lower sides of the regular hexagonal nut are parallel to each other, or when the left and right sides of the nut are parallel to each other), the anti-rotation tooth groove 121 on the anti-rotation plate 12 can be aligned with the nut of the hexagonal head bolt with a hole 2, and the anti-loosening plate composition can be smoothly installed. The two anti-rotation plates 12 in the anti-loosening plate 1 can be respectively installed on the nuts of the two brake rail bolts (i.e., the hexagonal head bolt with a hole 2).

[0116] In the present invention, for specific implementation, see Figure 4 , the anti-rotation shaft 13 is a stepped shaft structure with a shoulder;

[0117] The anti-rotation shaft 13 is provided with an anti-rotation shaft small diameter end 133, an anti-rotation shaft large diameter end 132 and a shaft shoulder 131 in sequence from top to bottom;

[0118] The upper portion of the anti-rotation shaft small diameter end portion 133 is provided with an anti-rotation shaft riveting hole 134 with a top opening;

[0119] It should be noted that, in a specific implementation, the large diameter end 132 of the anti-rotation shaft passes vertically upward through the long hole on the anti-loosening base plate 11 (i.e., the second anti-rotation shaft mounting through hole 110), and the small diameter end 133 of the anti-rotation shaft passes vertically upward through the first anti-rotation shaft mounting through hole (a circular through hole) on the anti-rotation plate 12, and then is riveted through the anti-rotation shaft riveting hole 134. The anti-rotation shaft 13 will be tightly riveted to the top of the anti-rotation plate 12. Since the anti-rotation shaft 13 is a stepped shaft, the fitting clearance between the anti-rotation plate 12 and the anti-loosening base plate 11 is guaranteed. In addition, the fitting clearance between the long hole on the anti-loosening base plate 11 (i.e., the second anti-rotation shaft mounting through hole 110) and the anti-rotation shaft 13 allows the anti-rotation plate 12 to rotate a certain angle on the anti-loosening base plate 11.

[0120] In the present invention, in a specific implementation, the anti-loosening plate 1 further includes: a support column 14;

[0121] A support column 14 is riveted to the left and right ends of the opposite sides of the two anti-loosening heads 111 on the anti-loosening bottom plate 11 .

[0122] For specific implementation, see Figure 5 , the support column 14 is also a stepped shaft;

[0123] The support column 14 is provided with a support column small diameter end portion 142 and a support column large diameter end portion 141 in sequence from top to bottom;

[0124] The upper portion of the supporting column small diameter end portion 142 is provided with a supporting column rivet hole 143 with a top opening.

[0125] It should be noted that the small-diameter end portion 142 of the support column vertically passes through the support column through hole 112 reserved on the anti-loosening head 11 of the anti-loosening base plate 11, and then is riveted through the support column riveting hole 143.

[0126] In the present invention, for specific implementation, see Figure 1b , an anti-rotation platform 6 is provided at the middle position of the upper left end of the brake caliper 101;

[0127] Anti-rotation nut receiving notches 60 are respectively provided on the front and rear sides of the anti-rotation platform 6;

[0128] The two anti-rotation nut receiving notches 60 have side walls only on the opposite side (i.e., the inner side) and the right side;

[0129] The two anti-rotation nuts 3 are respectively located in the two anti-rotation nut receiving notches 60 and are respectively in contact with the right side walls of the two anti-rotation nut receiving notches 60. Therefore, the anti-rotation nut receiving notches can prevent the anti-rotation nuts 3 from rotating toward the right side walls thereof.

[0130] That is, the bottom, left side and outer side of each anti-rotation nut receiving notch 60 are open (all are open).

[0131] In order to more clearly understand the technical solution of the present invention, the installation process of the present invention is described below.

[0132] First, see Figure 1a For any brake caliper 101, a longitudinally distributed brake rail 102 is connected to the top of the left end of the brake caliper 101, and a hexagonal head bolt 2 with a hole passes through the spring washer 4, the brake rail 102 and the brake caliper 101 from top to bottom, and is connected to the anti-rotation nut 3; wherein the anti-rotation nut 3 will not rotate due to the limiting effect of the anti-rotation platform 6 on the brake caliper 102;

[0133] Next, tighten the two hexagonal head bolts 2 according to the pre-required tightening torque, and then put the anti-loosening plate 1 on the hexagonal outside of the nuts of the two hexagonal head bolts 2 and the outer side of the middle and upper parts of the two spring washers 4, and then put the cotter pin on the nut of each hexagonal head bolt 2 to complete the installation of the brake rail bolt anti-loosening device.

[0134] Among them, for the anti-loosening plate 1, when installing it on the outside of the nuts of the two cap-hole bolts 2, the anti-rotation plates 12 at the top of the two ends of the anti-loosening plate 1 can be rotated respectively, so that the anti-rotation tooth grooves 121 (which can be referred to as rotation teeth) on the edges of the anti-rotation tooth through holes 120 of the anti-rotation plate 12 are aligned with the nuts (i.e., hexagonal caps) of the hexagonal head-hole bolts 2, and then installed.

[0135] It should be noted that, for the present invention, when the brake rail bolt (i.e., the hexagonal head bolt with a hole 2) is about to loosen under the action of external force, the anti-rotation nut 3 is blocked on the anti-rotation platform 6 of the brake caliper 102 and will not rotate, and only the hexagonal head bolt with a hole 2 will rotate. When the hexagonal head bolt with a hole 2 rotates, the nut thereon will rotate with the anti-rotation plate 12, and when the anti-rotation shaft 13 on the anti-rotation plate 12 rotates to the side of the long circular hole (i.e., the second anti-rotation shaft mounting through hole 110) on the anti-loosening bottom plate 11, it can no longer rotate, thereby limiting the rotation of the nut of the hexagonal head bolt with a hole 2, and then limiting the rotation of the entire hexagonal head bolt with a hole 2, ultimately achieving the function and effect of preventing the hexagonal head bolt with a hole from loosening.

[0136] To sum up, compared with the prior art, the brake rail bolt anti-loosening device provided by the present invention has a scientific structural design, can significantly improve the anti-loosening effect of the hexagonal head bolt with a hole (i.e., brake rail bolt) used to connect the brake rail of the vehicle reducer and the brake caliper, ensure the connection reliability between the brake rail of the vehicle reducer and the brake caliper, and has great production practical significance.

[0137] Compared with the prior art, the brake rail bolt anti-loosening device provided by the present invention also has the following technical effects:

[0138] 1. After the hexagonal head bolt with a hole is tightened in place, there is no need to loosen or tighten the anti-rotation plate through the hexagonal head bolt with a hole, which saves installation time. The hexagonal head bolt with a hole does not need to be reversed after tightening, which increases the initial pre-tightening force of the hexagonal head bolt with a hole, making the anti-loosening effect of the hexagonal head bolt with a hole more obvious.

[0139] 2. The anti-loosening base plate is sleeved on the outer periphery of the middle and upper part of the spring washer (specifically, in the anti-loosening head through hole 1110 on the anti-loosening head 111 of the anti-loosening base plate 11), which can prevent the spring washer from detaching after being damaged, maintain the pre-tightening force of the brake rail bolt, and effectively prevent the bolt from loosening. Even if the spring washer is damaged, it does not need to be replaced before debugging, thereby reducing the amount of on-site maintenance.

[0140] 3. The anti-rotation plate is placed above the brake rail. As long as the anti-rotation plate is installed well, the hexagonal head bolt with a hole will not be loosened, which makes it easy to check the installation status of the hexagonal head bolt with a hole, and even remote video inspection can be performed through video equipment, providing a good technical foundation for the detection equipment.

[0141] 4. The cotter pin hole is set on the nut of the hexagonal head bolt with a hole, which improves the reliability of the connection.

[0142] 5. The installation of anti-loosening shaft and support column adopts riveting method, without welding, which further improves the reliability of connection.

[0143] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A loosening prevention device for brake rail bolts, characterized in that, it is used to connect multiple brake calipers and any one brake rail, and the device includes a loosening prevention plate, a hexagon head bolt with a hole in the head, a rotation prevention nut, a spring washer and a split pin; The longitudinally distributed brake rails are provided with multiple pairs of vertically penetrating brake rail through holes at intervals from front to back; Each pair of brake rail through holes are respectively connected to the left end of a laterally distributed brake caliper; At the position corresponding to the brake rail through hole on the left end of each brake caliper, a pair of vertically penetrating brake caliper through holes are provided at intervals front and back; For each brake caliper, two hexagon head bolts with holes in the head respectively pass through the central through hole of a spring washer, a brake rail through hole on the brake rail and a brake caliper through hole on the brake caliper from top to bottom in sequence, and their lower ends are respectively threadedly fixed and connected to a rotation prevention nut; The lower parts of the screw heads of the two hexagon head bolts with holes in the head and the upper middle parts of the two spring washers are sleeved with the same loosening prevention plate; A laterally penetrating through hole is respectively provided in the screw head of each hexagon head bolt with a hole in the head; A split pin is respectively inserted into each laterally penetrating through hole; The loosening prevention plate includes a loosening prevention bottom plate and a rotation prevention plate; The loosening prevention bottom plate is longitudinally distributed; A loosening prevention head is respectively provided at the front and rear ends of the loosening prevention bottom plate; the two loosening prevention heads are symmetrically distributed front and back; A rotation prevention plate is respectively provided at the top of each loosening prevention head; a rotation prevention tooth through hole is provided at the center position of the rotation prevention plate; multiple rotation prevention tooth grooves are provided at the four peripheral edges of the rotation prevention tooth through hole; A loosening prevention head through hole is provided at the position directly below the rotation prevention tooth through hole on each loosening prevention head; The rotation prevention tooth through hole is used to sleeve the outside of the screw head at the top of the hexagon head bolt with a hole in the head; The loosening prevention head through hole on the loosening prevention head is used to place the upper middle part of the spring washer; The bottom of the split pin is in tight contact with the top surface of the rotation prevention plate; The loosening prevention plate further includes a rotation prevention shaft; a first rotation prevention shaft installation through hole is respectively opened in the middle of the front and rear ends of each rotation prevention plate; Each rotation prevention plate is connected to a loosening prevention head in the loosening prevention bottom plate through two rotation prevention shafts passing through the two first rotation prevention shaft installation through holes; Each rotation prevention shaft passes through a second rotation prevention shaft installation through hole reserved on the loosening prevention head of the loosening prevention bottom plate and a first rotation prevention shaft installation through hole reserved on the rotation prevention plate from bottom to top in sequence, and rivets the loosening prevention bottom plate and the rotation prevention plate; The second rotation prevention shaft installation through hole is a long strip through hole; The rotation prevention shaft is provided with a rotation prevention shaft small diameter end, a rotation prevention shaft large diameter end and a shoulder from top to bottom in sequence; The upper part of the rotation prevention shaft small diameter end has a rotation prevention shaft riveting hole with an open top.

2. The loosening prevention device for brake rail bolts according to claim 1, characterized in that, the loosening prevention plate further includes a support column; A support column is respectively riveted to the left and right ends of the side of the loosening prevention bottom plate where the two loosening prevention heads are opposite.

3. The loosening prevention device for brake rail bolts according to claim 2, characterized in that, the support column is provided with a support column small diameter end and a support column large diameter end from top to bottom in sequence; The upper part of the support column small diameter end has a support column riveting hole with an open top.

4. The loosening prevention device for brake rail bolts according to any one of claims 1 to 3, characterized in that, a rotation prevention platform is provided at the middle position of the upper part of the left end of the brake caliper; rotation prevention nut accommodation notches are respectively provided on the front and rear sides of the rotation prevention platform; The two anti-rotation nut receiving notches have side walls only on the opposite side and the right side; The two anti-rotation nuts are respectively located in the two anti-rotation nut receiving notches and are respectively in contact with the right side walls of the two anti-rotation nut receiving notches.

Images