Rotation stopping seat, buffer beam assembly and chassis of railway vehicle

Abstract

The utility model provides a rotation stopping seat, a buffer beam assembly and a chassis of a railway vehicle. The rotation stopping seat facilitates tightening operation of a connecting nut and a connecting bolt. The rotation stopping seat comprises a groove structure, the wall portion of the groove structure comprises a limiting wall portion, the limiting wall portion is a straight wall portion, the groove structure is used for containing at least part of a bolt head of a connecting bolt, and the limiting wall portion is used for being matched with the peripheral wall portion of the bolt head of the connecting bolt for rotation stopping.

Description

Technical Field

[0001] The present application relates to the technical field of rail vehicles, and in particular to a rotation stop seat, a buffer beam assembly and an underframe of a rail vehicle. Background Art

[0002] A buffer beam is provided on the underframe of a rail vehicle, and an anti-climbing energy absorbing device is installed on the buffer beam. The anti-climbing energy absorbing device is generally fixed to the buffer beam by connecting bolts and connecting nuts matching the connecting bolts. Specifically, the connecting bolts are passed through the end plate of the buffer beam and the installation part of the anti-climbing energy absorbing device, and then the connecting nuts are tightened to fix it. However, the tightening operation of the connecting nuts and connecting bolts is not convenient, and the connection reliability is insufficient. Utility Model Content

[0003] The purpose of the present application is to provide a rotation stop seat, a buffer beam assembly and a chassis of a rail vehicle, which facilitate the tightening operation of connecting nuts and connecting bolts.

[0004] In order to solve the above-mentioned technical problems, the present application provides a rotation stop seat, which includes a groove structure. The wall portion of the groove structure includes a limiting wall portion, and the limiting wall portion is a straight wall portion. The groove structure is used to accommodate at least part of the bolt head of the connecting bolt, and the limiting wall portion is used to cooperate with the outer peripheral wall portion of the bolt head of the connecting bolt to stop rotation.

[0005] Optionally, the wall portion of the groove structure is also provided with a step portion, the step surface of the step portion faces the notch of the groove structure, the connecting bolt has a bolt head, the bolt head has a radially protruding limiting ring, and the step surface is used to limit the radially protruding limiting ring of the bolt head inward along the axial direction of the connecting bolt.

[0006] Optionally, the wall portion of the groove structure includes two groove side wall portions that are oppositely arranged and parallel to each other, a portion of the wall portion of each groove side wall portion is the limiting wall portion, and each groove side wall portion is provided with the step portion.

[0007] Optionally, the notch edge of the groove structure has a stopper extending inwardly, the connecting bolt has a bolt head, the bolt head has a radially protruding limiting ring, and the stopper is used to limit the radially protruding limiting ring of the bolt head outwardly along the axial direction of the connecting bolt;

[0008] One side of the groove structure is provided with a notch, and the notch is used for allowing the bolt head of the connecting bolt to penetrate into the groove structure.

[0009] Optionally, the anti-rotation seat includes a connecting beam, each end of which is connected to a groove structure; the connecting beam includes a first beam body and a second beam body, a slideway is formed between the first beam body and the second beam body, and the screw rod of the connecting bolt can slide along the slideway to allow the bolt head to slide from the notch into the groove structure.

[0010] Optionally, the wall portion of the groove structure includes two groove side wall portions that are oppositely arranged and parallel to each other, each of the groove side wall portions is the limiting wall portion, and the stop portion is connected to the limiting wall portion.

[0011] Optionally, the anti-rotation seat has a connecting hole, and the connecting hole is used to cooperate with a fastener to be fixed to the buffer beam.

[0012] Optionally, the anti-rotation seat includes a connecting beam, and each end of the connecting beam is connected to the groove structure.

[0013] The anti-rotation seat provided in the present application includes a limiting wall portion, which can cooperate with the outer peripheral wall of the bolt head of the connecting bolt to prevent rotation. In this way, as long as the connecting bolt is assembled together with the anti-rotation seat, the connecting bolt cannot rotate on the anti-rotation seat, which is beneficial to the locking cooperation between the connecting nut and the connecting bolt, that is, the thread locking with the connecting bolt can be achieved by rotating the connecting nut, and there is no need to hold the connecting bolt while rotating the connecting nut, which is easy to operate and the connection between the connecting bolt and the connecting nut is more reliable.

[0014] The present application also provides a buffer beam assembly, comprising a buffer beam and an anti-climbing energy absorbing device installed on the buffer beam, the buffer beam assembly further comprising any one of the above-mentioned anti-rotation seats; the buffer beam comprises an end plate for installing the anti-climbing energy absorbing device, the anti-rotation seat is installed on the inner side of the end plate;

[0015] The buffer beam assembly also includes a connecting bolt and a connecting nut, wherein at least a portion of the bolt head of the connecting bolt is located in the groove structure of the anti-rotation seat, and the screw rod of the connecting bolt passes through the end plate and the anti-climbing energy absorption device and is connected to the connecting nut.

[0016] The present application also provides an underframe of a rail vehicle, wherein the underframe includes the buffer beam assembly described above.

[0017] The buffer beam assembly and the underframe of the rail vehicle provided in the present application have the above-mentioned anti-rotation seat, and thus have the same technical effects, which will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the underframe of a rail vehicle in an embodiment of the present application;

[0019] Figure 2 for Figure 1 Structural schematic diagram of the middle buffer beam;

[0020] Figure 3 for Figure 2 A cross-sectional view of the middle buffer beam;

[0021] Figure 4 for Figure 3 A magnified view of the middle A area;

[0022] Figure 5 This is a schematic diagram of the structure after the stop swivel seat and the connecting bolts are assembled in the embodiment of the present application;

[0023] Figure 6 for Figure 5 Enlarged view of the B area;

[0024] Figure 7 for Figure 5 Exploded diagram of

[0025] Figure 8 for Figure 7 Enlarged view of the middle C area;

[0026] Fig. 9 for Figure 5 The main view of the suspended transposition;

[0027] Fig.10 for Figure 5 Top view of the aborted transposition;

[0028] Fig.11 This is a schematic diagram of the matching structure of the connecting bolt and the groove of the anti-rotation seat in another embodiment of the present application;

[0029] Fig.12 for Figure 1 Enlarged view of area D in the middle.

[0030] The following are the descriptions of the reference numerals:

[0031] 100- bottom frame;

[0032] 101-side beam;

[0033] 102-buffer beam; 1021-end plate; 1022-top plate; 1023-connecting plate; 102a-mounting hole;

[0034] 103- beam;

[0035] 104-pillar inner longitudinal beam;

[0036] 105-corbelt;

[0037] 106- traction beam;

[0038] 107-anti-climbing energy absorption device; 1071-mounting plate;

[0039] 108- anti-rotation seat; 108b- groove structure; 108b1- notch; 1081- bottom wall; 1082- limiting wall; 1083- step portion; 10831- step surface; 10832- step side wall; 1084- stopper; 1085- connecting beam; 10851- first beam body; 10852- second beam body; 108a- slideway; 108c- connecting hole;

[0040] 109-connecting bolt; 1091-bolt head; 10911-polygonal head; 10912-limiting ring; 1092-screw;

[0041] 110-connecting nut;

[0042] 111- gasket;

[0043] 112-Fasteners. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] In the embodiments of the present application, the terms "first" and "second" are only used to distinguish different components, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0046] Please refer to Figures 1 to 3 , Figure 1 This is a schematic structural diagram of a rail vehicle underframe 100 in an embodiment of the present application; Figure 2 for Figure 1 A schematic structural diagram of the middle buffer beam 102; Figure 3 for Figure 2 The cross-sectional view of the middle buffer beam 102 is specifically a cross-sectional view along the longitudinal direction, where the longitudinal direction is the longitudinal direction of the underframe 100 and the rail vehicle.

[0047] The underframe 100 of the rail vehicle includes side beams 101 located on both sides. The side beams 101 extend in the longitudinal direction. One end of the two side beams 101 is connected to a cross beam 103. The other end of the two side beams 101 is connected to a buffer beam assembly. The buffer beam assembly includes a buffer beam 102. The two ends of the buffer beam 102 are respectively connected to the end of one side beam 101. The buffer beam 102 is equipped with an anti-climbing energy absorption device 107. When a collision occurs, the anti-climbing energy absorption device 107 can absorb the collision energy. The middle part of the two side beams 101 is connected to a bolster beam 105. The bolster inner longitudinal beam 104 extending in the longitudinal direction is connected between the bolster beam 105 and the cross beam 103. A traction beam 106 is connected between the bolster beam 105 and the buffer beam 102.

[0048] like Figure 2 As shown, the buffer beam 102 includes an end plate 1021, which extends in the transverse direction, which is perpendicular to the longitudinal direction, and is also the width direction of the chassis 100 and the rail vehicle. The thickness direction of the end plate 1021 is the longitudinal direction. The buffer beam 102 may also include a top plate 1022 extending in the transverse direction and having a thickness direction in the vertical direction, and a connecting plate 1023 located below the top plate 1022, and the connecting plate 1023 may be used to connect with the side beam 101. The end plate 1021 is provided with a mounting hole 102a that penetrates the end plate 1021 in the longitudinal direction, and a part of the anti-climbing energy absorption device 107 may be inserted into the mounting hole 102a for positioning. Specifically, the end plate 1021 is provided with mounting holes 102a at both ends in the transverse direction, and the anti-climbing energy absorption device 107 is installed at both ends of the buffer beam 102. The anti-climbing energy absorption device 107 includes a mounting plate 1071, which is located on the outer side of the end plate 1021 and is used to be fixedly connected with the end plate 1021. The "outside" and "inside" mentioned in this application are Figure 3 From a perspective, the side of the end plate 1021 close to the traction beam 106 is the inner side, and the side away from the traction beam 106 is the outer side.

[0049] The buffer beam assembly in this embodiment further includes a rotation stopper 108, a connecting bolt 109, and a connecting nut 110. The rotation stopper 108, the connecting bolt 109, and the connecting nut 110 are all used to fix the anti-climbing energy absorption device 107 to the buffer beam 102. Figure 4 As shown, Figure 4 for Figure 3 Magnified view of area A.

[0050] The anti-rotation seat 108 is installed on the inner side of the end plate 1021 of the buffer beam 102, and the bolt head 1091 of the connecting bolt 109 is also located on the inner side of the end plate 1021. The anti-rotation seat 108 is used to stop the connecting bolt 109 from rotating. The screw rod 1092 of the connecting bolt 109 passes through the end plate 1021 of the buffer beam 102 and the mounting plate 1071 of the anti-climbing energy absorbing device 107, and then is locked by tightening the connecting nut 110 to achieve the connection and fixation of the anti-climbing energy absorbing device 107 and the buffer beam 102, that is, the bolt head 1091 of the connecting bolt 109 is located on the inner side of the end plate 1021, and the screw rod 1092 passes through the end plate 1021 and is threadedly connected with the connecting nut 110 located on the outer side of the end plate 1021. The buffer beam assembly may further include a gasket 111, and the screw rod 1092 passes through the gasket 111 and then is threadedly matched with the connecting nut 110 to protect the mounting plate 1071 and provide a better locking effect.

[0051] The structure of the anti-rotation seat 108 and the matching method between the anti-rotation seat 108 and the connecting bolt 109 are described in detail below.

[0052] Please refer to Figures 5 to 10 , Figure 5 This is a schematic diagram of the structure after the stop swivel seat 108 and the connecting bolt 109 are assembled in the embodiment of the present application; Figure 6 for Figure 5 Enlarged view of the B area; Figure 7 for Figure 5 Exploded diagram of Figure 8 for Figure 7 Enlarged view of the middle C area; Fig. 9 for Figure 5 A front view of the stop swivel 108; Fig.10 for Figure 5 A top view of the stop swivel 108.

[0053] The anti-rotation seat 108 in this embodiment includes a groove structure 108b, such as Fig. 9 , 10 As shown, both ends of the anti-rotation seat 108 are groove structures 108b. The anti-rotation seat 108 specifically includes a connecting beam 1085. The two ends of the connecting beam 1085 are respectively connected to a groove structure 108b. The groove structure 108b and the connecting beam 1085 can be set as one body, which has good strength. For example, a concave cavity is machined at both ends of a plate-like structure to form a groove structure 108b at the end. The wall portion of the groove structure 108b includes a bottom wall portion 1081 and a groove side wall portion surrounding the bottom wall portion 1081. The groove side wall portion and the bottom wall portion 1081 define the concave cavity of the groove structure 108b. The notch of the groove structure 108b is opposite to the bottom wall portion 1081. The bottom wall portion 1081 and the notch of the groove structure 108b are distributed in the longitudinal direction. The wall portion of the groove structure 108b also includes a limiting wall portion 1082, which can be a groove side wall portion or a part of the groove side wall portion. This embodiment specifically includes two limiting walls 1082 arranged opposite to each other. The limiting wall portion 1082 is a straight wall portion, and the two limiting walls 1082 are parallel to each other.

[0054] like Figure 7 As shown, the connecting bolt 109 includes a bolt head 1091 and a screw rod 1092 connected to the bolt head 1091. The bolt head 1091 includes a polygonal head 10911 and a limiting ring 10912. Compared with the polygonal head 10911, the limiting ring 10912 is closer to the screw rod 1092. The cross section of the polygonal head 10911 is a polygon, for example, a hexagon. In this way, the outer peripheral wall of the bolt head 1091 includes a plurality of straight peripheral walls distributed along the circumferential direction and connected in sequence. The limiting ring 10912 radially protrudes from the polygonal head 10911. The radial dimension of the limiting ring 10912 is greater than the radial dimension of the polygonal head 10911 and the screw rod 1092. The radial direction here is the radial direction of the connecting bolt 109. The limiting ring 10912 can be Figure 7 The circular ring shown in the figure may also be in other shapes, which is not limited in this embodiment.

[0055] The groove structure 108b of the anti-rotation seat 108 is used to accommodate at least a portion of the bolt head 1091 of the connecting bolt 109, that is, at least a portion of the bolt head 1091 can be inserted into the concave cavity of the groove structure 108b, and the two limiting wall portions 1082 of the groove structure 108b are used to cooperate with the outer peripheral wall of the bolt head 1091 of the connecting bolt 109 to stop rotation, such as Figure 6 As shown, the two straight circumferential walls of the polygonal head 10911 of the connecting bolt 109 are respectively matched with a limiting wall portion 1082, and the limiting wall portion 1082 is also a straight wall portion. The limiting wall portion 1082 and the straight circumferential wall of the polygonal head 10911 can be in contact or clearance fit, so that the straight circumferential wall and the limiting wall portion 1082 can cooperate to stop rotation. That is, when at least part of the polygonal head 10911 of the bolt head 1091 is located in the groove structure 108b along the axial direction, the connecting bolt 109 cannot rotate on the anti-rotation seat 108 due to the cooperation of the straight circumferential wall of the polygonal head 10911 and the limiting wall portion 1082 to stop rotation, thereby facilitating the locking fit of the connecting nut 110 and the connecting bolt 109, that is, as long as the connecting nut 110 is rotated, the thread locking with the connecting bolt 109 can be achieved, and there is no need to hold the connecting bolt 109 while rotating the connecting nut 110, so it is easy to operate.

[0056] It can be understood that the anti-rotation seat 108 provided in this embodiment is used to be combined with the connecting bolt 109 to form a component so as to limit the rotation of the connecting bolt 109 when it is threadedly matched with the connecting nut 110, so as to facilitate the rotation operation of the connecting nut 110. Therefore, the anti-rotation seat 108 is not limited to being used to cooperate with the connecting bolt 109 to install the anti-climbing energy absorption device 107 to the buffer beam 102. Any two parts that need to be connected by the connecting bolt 109 and the connecting nut 110 can be equipped with the anti-rotation seat 108 for auxiliary connection. These two parts are defined as the first part and the second part, that is, the anti-rotation seat 108 is installed on the first part, and the second part is fixed to the first part by the connecting bolt 109 and the connecting nut 110. In the embodiment of the present application, the first part is the buffer beam 102 and the second part is the anti-climbing energy absorption device 107 for example.

[0057] It can be known that the anti-rotation seat 108 in the embodiment of the present application is provided with two relatively arranged limiting wall portions 1082 and the outer peripheral wall of the connecting bolt 109 for anti-rotation cooperation, but in fact, it is sufficient to provide at least one limiting wall portion 1082 and the outer peripheral wall of the connecting bolt 109 for anti-rotation cooperation, and providing two or more limiting wall portions 1082 makes the anti-rotation cooperation more reliable. In order to cooperate with the two relatively arranged and mutually parallel limiting wall portions 1082, the polygonal head 10911 is specifically a hexagonal head, including two relatively arranged and mutually parallel straight peripheral walls, but it is obvious that the bolt head 1091 of the connecting bolt 109 is not limited to the polygonal head 10911, for example, it is a D-shaped head, that is, including an arc-shaped peripheral wall and a straight peripheral wall, and the groove structure 108b includes a straight limiting wall portion 1082 and the straight peripheral wall for anti-rotation cooperation, and the embodiment of the present application does not make further restrictions on this.

[0058] like Figure 7 As shown, the anti-rotation seat 108 in this embodiment is specifically fixed to the end plate 1021 of the buffer beam 102 by a fastener 112, as shown in FIG. Figure 5 As shown, the anti-rotation seat 108 is provided with a connection hole 108c, and the fastener 112 can be a screw, a bolt, etc. During assembly, the bolt head 1091 of the connecting bolt 109 is first placed in the concave cavity of the groove structure 108b, and the two are preassembled into a component, and then the component is placed on the inner side of the end plate 1021 of the buffer beam 102, and the screw rod 1092 of the connecting bolt 109 passes through the end plate 1021, and then the fastener 112 is inserted into the connection hole 108c and the end plate 1021, and the anti-rotation seat 108 is fixed to the end plate 1021 of the buffer beam 102, and then the connecting bolt is fixed. 109 and the anti-rotation seat 108 are both assembled to the end plate 1021, and the bolt head 1091 of the connecting bolt 109 is located between the bottom wall portion 1081 of the groove structure 108b of the anti-rotation seat 108 and the end plate 1021 of the buffer beam 102. The connecting bolt 109 can neither rotate around its own axis nor move along its axial direction, thereby facilitating the locking operation of the connecting nut 110 and the screw 1092 passing through the mounting plate 1071 of the anti-climbing energy absorption device 107.

[0059] Please continue to refer to Figure 6 and Figure 8 It is understood that the wall of the groove structure 108b in this embodiment is also provided with a step portion 1083. The concave cavity of the groove structure 108b in this embodiment is substantially square, and the wall of the groove structure 108b includes two substantially straight groove side wall portions arranged opposite to each other. In this case, the step portion 1083 can be arranged on the groove side wall portion, and the limiting wall portion 1082 is also a partial wall portion of the groove side wall portion, such as Figure 8As shown, the end surface of the rotation stopper 108 can be machined in the axial direction to form a step portion 1083, that is, a portion of the straight groove side wall portion is cut to form the step portion 1083. The step surface 10831 of the step portion 1083 faces the notch of the groove structure 108b, and the step side wall 10832 of the step portion 1083 is a part of the groove side wall portion. The step surface 10831 is used to limit the radially protruding limiting ring 1091 of the bolt head 1091 inwardly along the axial direction of the connecting bolt 109.

[0060] Please continue to refer to Figure 6 Due to the setting of the step surface 10831, part of the limiting ring 10912 of the connecting bolt 109 can be located on the step portion 1083, and the step side wall 10832 can also be an arc-shaped wall, which cooperates with the circular circumferential wall of the limiting ring 10912. In this way, when the bolt head 1091 is placed in the groove structure 108b, the limiting ring 10912 will not interfere with the anti-rotation cooperation between the limiting wall portion 1082 and the outer circumferential wall of the polygonal head 10911. The larger area of ​​the limiting ring 10912 is conducive to abutting cooperation with the end plate 1021, thereby improving the connection strength.

[0061] Please continue to refer to Fig.11 , Fig.11 It is a schematic diagram of the cooperation between the connecting bolt 109 and the groove structure 108b of the anti-rotation seat 108 in another embodiment of the present application.

[0062] Different from the above embodiment in which the step portion 1083 is provided on the groove side wall portion of the groove structure 108b, the groove structure 108b in this embodiment does not have the step portion 1083, but a stopper portion 1084 is provided on the notch edge of the groove structure 108b. The other structures of the rotation stop seat 108 in this embodiment are the same as those in the above embodiment, and will not be described again. The stopper portion 1084 in this embodiment is used to limit the radially protruding stop ring 10912 of the bolt head 1091 outward along the axial direction of the connecting bolt 109.

[0063] The stopper 1084 is as follows Fig.11As shown, the stopper 1084 and the limiting wall 1082 may be connected along the axial direction perpendicular to the connecting bolt 109. When two limiting walls 1082 are provided, two stopper 1084 are provided accordingly, and one stopper 1084 extends toward the other limiting wall 1082. At this time, the bolt head 1091 of the connecting bolt 109 is entirely located in the concave cavity of the groove structure 108b, and the limiting ring 10912 is located inside the stopper 1084. Then, the bolt head 1091 is clamped between the bottom wall 1081 of the groove structure 108b and the stopper 1084, and the bolt head 1091 cannot be separated from the concave cavity of the groove structure 108b in the axial direction. When assembled to the end plate 1021 of the buffer beam 102 and the anti-climbing energy absorption device 107 is fixed by the connecting nut 110, as the connecting nut 110 is continuously tightened, the limiting ring 10912 of the bolt head 1091 will abut against the stop portion 1084. In the previous embodiment, the limiting ring 10912 of the bolt head 1091 abuts against the end plate 1021.

[0064] With such arrangement, when the anti-rotation seat 108 and the connecting bolt 109 are preassembled, since the connecting bolt 109 is limited axially both inside and outside, it is not easy for the connecting bolt 109 to separate from the anti-rotation seat 108. The assembly formed by the preassembled anti-rotation seat 108 and the connecting bolt 109 is relatively stable and reliable, which facilitates the installation operation of installing the assembly to the end plate 1021 of the buffer beam 102.

[0065] However, at this time, the connecting bolt 109 cannot be directly inserted into the concave cavity of the groove structure 108b along the axial direction. At this time, one side of the groove structure 108b may have a notch 108b1, that is, a circle of the bottom wall portion 1081 of the groove structure 108b is not completely surrounded by the groove side wall portion. In this embodiment, the wall portion of the groove structure 108b includes two oppositely arranged groove side wall portions (at least part of which serves as the limiting wall portion 1082), and another groove side wall portion ( Fig.11 The three groove side walls form a U-shaped wall portion surrounding the bottom wall portion 1081, and the notch 108b1 is used for the bolt head 1091 of the connecting bolt 109 to penetrate into the groove structure 108b. That is, when assembling the connecting bolt 109 and the rotation stopper 108, the bolt head 1091 of the connecting bolt 109 can be moved from the notch 108b1 position along the radial direction of the connecting bolt 109 to enter the groove structure 108b, and then the bolt head 1091 is limited in the axial direction between the bottom wall portion 1081 and the stop portion 1084.

[0066] Exemplarily, the anti-rotation seat 108 in this embodiment includes a connecting beam 1085, and each end of the connecting beam 1085 is connected to a groove structure 108b. Fig.12 understand, Fig.12for Figure 1 Enlarged view of area D in the middle.

[0067] The mounting plate 1071 of the anti-climbing energy absorption device 107 in this embodiment is connected to the end plate 1021 of the buffer beam 102 by four connecting bolts 109, and a connecting hole 108c is respectively arranged at both ends of each anti-rotation seat 108. The two groove structures 108b of each anti-rotation seat 108 are respectively matched with a connecting bolt 109, that is, one anti-rotation seat 108 stops two connecting bolts 109 at the same time, and the assembly is more convenient. At this time, each anti-climbing energy absorption device 107 can be installed on the end plate 1021 in cooperation with the two anti-rotation seats 108, and the connection is more reliable.

[0068] against Fig.11 In the embodiment, the connecting beam 1085 specifically includes a first beam body 10851 and a second beam body 10852. Fig.11 The structure of the anti-rotation seat 108 in the embodiment can be referred to Figure 5 understand( Fig.11 The anti-rotation seat 108 of the embodiment is only provided with a stopper 1084 instead of a step portion 1083 at the groove structure 108b. Figure 5 The anti-rotation seat 108 of the embodiment is the same), the first beam body 10851 and the second beam body 10852 extend parallel to each other, and there is a distance between the first beam body 10851 and the second beam body 10852, so that a slideway 108a is formed between the first beam body 10851 and the second beam body 10852, and the screw rod 1092 of the connecting bolt 109 can slide along the slideway 108a to allow the bolt head 1091 to slide from the notch 108b1 into the groove structure 108b.

[0069] That is, during assembly, the connecting bolt 109 can be placed on the inner side of the anti-rotation seat 108, and then the screw rod 1092 can be passed through the slideway 108a along its axial direction. The bolt head 1091 of the connecting bolt 109 is still located on the inner side of the slideway 108a, and the width of the slideway 108a is equal to the distance between the two limiting walls 1082. Fig. 9 As shown, the concave cavities of the slideway 108a and the groove structure 108b are connected, and then the connecting bolt 109 slides along the extension direction of the slideway 108a toward the direction close to the groove structure 108b until the bolt head 1091 slides into the groove structure 108b, and the two connecting bolts 109 can slide in the opposite direction to their corresponding groove structures 108b. In this way, on the one hand, the assembly of the connecting bolt 109 and the anti-rotation seat 108 is achieved, and on the other hand, the setting of the slideway 108a is conducive to the weight reduction design of the anti-rotation seat 108. It can be understood that Figure 5In the embodiment, although the bolt head 1091 of the connecting bolt 109 can be directly inserted into the groove structure 108b along the axial direction, the first beam body 10851 and the second beam body 10852 can also be arranged at intervals. In this case, although the connecting bolt 108 does not need to be slid and assembled from the slide 108a between the first beam body 10851 and the second beam body 10852, the setting of the slide 108a can achieve the purpose of weight reduction.

[0070] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A rotation stop seat, characterized in that: The anti-rotation seat includes a groove structure, the wall portion of the groove structure includes a limiting wall portion, the limiting wall portion is a straight wall portion, the groove structure is used to accommodate at least part of the bolt head of the connecting bolt, and the limiting wall portion is used to cooperate with the outer peripheral wall portion of the bolt head of the connecting bolt to stop rotation.

2. The anti-rotation seat according to claim 1, characterized in that: The wall portion of the groove structure is also provided with a step portion, the step surface of the step portion faces the notch of the groove structure, the connecting bolt has a bolt head, the bolt head has a radially protruding limiting ring, and the step surface is used to limit the limiting ring inwardly along the axial direction of the connecting bolt.

3. The anti-rotation seat according to claim 2, characterized in that: The wall portion of the groove structure includes two groove side wall portions which are arranged opposite to each other and parallel to each other, a part of the wall portion of each groove side wall portion is the limiting wall portion, and each groove side wall portion is provided with the step portion.

4. The anti-rotation seat according to claim 1, characterized in that: The notch edge of the groove structure has a stopper extending inwardly, the connecting bolt has a bolt head, the bolt head has a radially protruding limiting ring, and the stopper is used to limit the limiting ring outwardly along the axial direction of the connecting bolt; One side of the groove structure is provided with a notch, and the notch is used for allowing the bolt head of the connecting bolt to penetrate into the groove structure.

5. The anti-rotation seat according to claim 4, characterized in that: The anti-rotation seat includes a connecting beam, each end of which is connected to a groove structure; the connecting beam includes a first beam body and a second beam body, a slideway is formed between the first beam body and the second beam body, and the screw rod of the connecting bolt can slide along the slideway to allow the bolt head to slide from the notch into the groove structure.

6. The anti-rotation seat according to claim 4, characterized in that: The wall portion of the groove structure includes two groove side wall portions which are arranged opposite to each other and parallel to each other, each of the groove side wall portions is the limiting wall portion, and the stop portion is connected to the limiting wall portion.

7. The anti-rotation seat according to any one of claims 1 to 6, characterized in that: The anti-rotation seat has a connecting hole, and the connecting hole is used to cooperate with a fastener to be fixed to the buffer beam.

8. The anti-rotation seat according to any one of claims 1 to 4 and 6, characterized in that: The anti-rotation seat includes a connecting beam, and each end of the connecting beam is connected to the groove structure.

9. A buffer beam assembly, comprising a buffer beam and an anti-climbing energy absorption device installed on the buffer beam, characterized in that: The buffer beam assembly further comprises a rotation stop seat as claimed in any one of claims 1 to 8; the buffer beam comprises an end plate for mounting the anti-climbing energy absorption device, and the rotation stop seat is mounted on the inner side of the end plate; The buffer beam assembly also includes a connecting bolt and a connecting nut, wherein at least a portion of the bolt head of the connecting bolt is located in the groove structure of the anti-rotation seat, and the screw rod of the connecting bolt passes through the end plate and the anti-climbing energy absorption device and is connected to the connecting nut.

10. An underframe of a rail vehicle, characterized in that: The chassis includes the bumper beam assembly of claim 9.

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