A connecting structure of a guide wheel protective cover and a guide wheel protective cover

Abstract

The present invention relates to the technical field of rail vehicles, and in particular to a connecting structure of a guide wheel protective cover and a guide wheel protective cover, wherein the guide wheel protective cover comprises an upper protective cover and a lower protective cover, and the connecting structure comprises an upper connecting assembly and a lower connecting assembly arranged between the upper protective cover and the bogie frame; the upper connecting assembly comprises a connecting shaft 1, a support frame 1 fixed below the connecting shaft 1, and an elastic abutting member located between the connecting shaft 1 and the support frame 1, and when the upper protective cover is closed, a clamping force is provided by the elastic abutting member, and when the upper protective cover is opened, an auxiliary tension is provided by the elastic abutting member; the lower connecting assembly comprises a connecting shaft 2, a support frame 2 located below the connecting shaft 2, and a clamping sleeve fixed on the support frame 2, and the protective cover can be clamped or opened in the clamping sleeve through the connecting shaft 2. The protective cover connection structure in the present invention is simple and convenient, and can realize a stable connection between the protective cover and the bogie frame.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicles, and in particular to a connecting structure of a guide wheel protective cover and a guide wheel protective cover. Background Art

[0002] Rail vehicles include maglev trains, skyrail vehicles, and suspended vehicles. During the operation of the vehicle, especially when the vehicle passes a curve, in order to prevent the vehicle body from swinging too much to the left and right or tilting, guide wheels are usually set on the bogie frame to guide the vehicle body, so as to improve the stability and safety of the vehicle body and the comfort of passengers. During the long-term use of rail vehicles, dust and water are easily accumulated on the guide wheels and the bogie frame connected to them, which in turn causes corrosion and damage to the guide wheels and the bogie frame, seriously affecting the wear resistance of the guide wheels, increasing the maintenance cost of the guide wheels, and reducing the performance of the guide wheels and the bogie frame.

[0003] Therefore, it is necessary to provide a protective cover on the guide wheel to prevent water and dust accumulation in order to improve the performance and service life of the guide wheel and the bogie. The protective cover is usually connected to the bogie frame. The connection structure between the protective cover and the bogie frame determines whether the protective cover can be connected stably to ensure the protection effectiveness, whether interference between the protective cover and the bogie frame or guide wheel can be avoided, and whether it is flexible to use. Therefore, designing a protective cover connection structure with simple structure and reliable performance is a problem that needs to be solved urgently. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a connecting structure of a guide wheel guard, which realizes stable connection through an upper connecting assembly and a lower connecting assembly, has a simple structure, is easy to use, and has strong applicability. The present invention also provides a guide wheel guard connected to a bogie frame using the above connecting structure.

[0005] To achieve the above object, the present invention proposes the following technical solutions: a connecting structure of a guide wheel protective cover and a guide wheel protective cover, comprising an upper connecting assembly and a lower connecting assembly arranged between the protective cover and a bogie frame, wherein the upper connecting assembly and the lower connecting assembly are both located on the inner side of the protective cover and the upper connecting assembly is placed above the lower connecting assembly;

[0006] The upper connecting assembly comprises a connecting shaft 1, a supporting frame 1 fixed below the connecting shaft 1, and an elastic fastening member located between the connecting shaft 1 and the supporting frame 1; the connecting shaft 1 is inserted into the supporting frame 1 and both ends of the connecting shaft 1 are mounted in a connecting hole group 1 of the protective cover, and the side of the supporting frame 1 away from the connecting shaft 1 is connected to the bogie frame;

[0007] The lower connecting assembly includes a connecting shaft 2, a support frame 2 located below the connecting shaft 2, and a clamping sleeve fixed on the support frame 2; the two ends of the connecting shaft 2 are mounted in the connecting hole group 2 of the protective cover, and the side of the support frame 2 away from the connecting shaft 2 is connected to the bogie frame; the protective cover can be clamped or opened in the clamping sleeve through the connecting shaft 2.

[0008] Preferably, support frame 1 includes an upper support frame, a lower support frame and a side support plate connected between the upper support frame and the lower support frame, the side support plate is located on the side ends of the upper support frame and the lower support frame away from the connecting axis 1; the upper support frame is provided with a support ear with an ear hole, and the connecting axis 1 is passed through the ear hole; the elastic fastening member is located on the upper support frame and on the side of the support ear.

[0009] Preferably, the elastic clamping member includes a lower supporting spring sheet and an upper opening and closing spring sheet of a multi-arc surface segment combination structure; the lower supporting spring sheet and the upper opening and closing spring sheet are both fixed on the upper supporting frame and the upper opening and closing spring sheet is located at the upper end of the lower supporting spring sheet; the overall length of the upper opening and closing spring sheet is 2-4 times the overall length of the lower supporting spring sheet.

[0010] Preferably, the upper opening and closing spring piece includes, from top to bottom, an upper convex arc segment, a lower concave arc segment one and a lower convex arc segment one, and the lower convex arc segment one is connected to the upper support plate through a lower straight surface segment one; the lower support spring piece includes a lower concave arc segment two and a lower convex arc segment two, and the lower concave arc segment two and the lower convex arc segment two are respectively matched and connected to the lower ends of the lower concave arc segment one and the lower convex arc segment one, and the lower convex arc segment two is connected to the upper support plate through a lower straight surface segment two; the upper convex arc segment, the lower convex arc segment one and the lower concave arc segment two are all protruding toward the side away from the lower support frame, and the lower concave arc segment one and the lower concave arc segment two are both protruding toward the lower support frame.

[0011] Preferably, the side support plate is inclined from top to bottom along the side end of the upper support frame toward the side end of the lower support frame; the upper support frame includes a main support and side supports symmetrically connected to the two side ends of the main support, and a connecting platform is extended outward from the upper part of the side support plate, and the free end of the side support is connected to the connecting platform; a receiving groove is provided in the middle part of the main support, and the upper opening and closing spring sheet and the lower supporting spring sheet are arranged in the receiving groove.

[0012] Preferably, the supporting ear includes a connecting column fixed on the main bracket and an earring located on the connecting column, and the ear hole is formed by the inner hole of the earring; the supporting ears include at least two and are arranged on both sides of the elastic clamping member; the connecting shaft is vertically arranged with the upper end face of the guide wheel.

[0013] Preferably, the clamping sleeve includes two symmetrically arranged clamping plates, which include a support section of a straight surface structure and a clamping section of a multi-arc surface section structure in sequence from support frame 2 toward the outside; the support section is connected to support frame 2 through arc surface section 1; and the protective cover can be clamped or opened in the clamping section through connecting shaft 2.

[0014] Preferably, the clamping section includes arc surface section two and arc surface section three, and the arc surface section two is connected to the supporting section; the arc surface section one and the arc surface section two both protrude toward the side away from the central axis of the clamping sleeve, and the arc surface section three protrudes toward the central axis of the clamping sleeve; the protective cover can be clamped or opened in the clamping groove formed by the arc surface sections two of the two clamping sleeves through the connecting shaft two.

[0015] Preferably, support frame 2 includes a bottom bracket and an upper bracket vertically supported on the bottom bracket; the upper bracket includes a bottom vertical section connected to the bottom bracket and an upper inclined section located on the side of the bottom vertical section away from the bottom bracket, and the upper inclined section is inclined from the end of the bottom vertical section toward the side away from connecting axis 2; a mounting plate is provided at one end of the arc surface section, and the clamping sleeve is fixed to the upper inclined section through the mounting plate.

[0016] A guide wheel protective cover comprises a guide wheel protective cover with the above-mentioned connection structure.

[0017] The beneficial effects of the present invention are:

[0018] 1. The upper connection assembly in the present invention includes a connecting shaft 1, a support frame 1 and an elastic clamping member. The support frame 1 is used to achieve a stable connection between the upper protective cover and the bogie frame. The connecting shaft 1 drives the upper protective cover to open and close. The elastic clamping member provides a clamping force when the upper protective cover is closed and provides auxiliary tension when the upper protective cover is opened.

[0019] 2. The lower connecting assembly in the present invention includes a second connecting shaft, a second support frame and a clamping sleeve. The second support frame is used to achieve a stable connection between the upper protective cover and the bogie frame. The second connecting shaft and the clamping sleeve are used to drive the upper protective cover to be flexibly opened and clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure diagram of the guide wheel protective cover (upper protective cover) and its connection structure provided in an embodiment of the present invention is shown in FIG. Figure 1 .

[0021] Figure 2 The overall structure diagram of the guide wheel protective cover (upper protective cover) and its connection structure provided in an embodiment of the present invention is shown in FIG. Figure 2 .

[0022] Figure 3 The structure of the upper connection assembly provided by the embodiment of the present invention is shown in FIG. Figure 1 .

[0023] Figure 4 The structure of the upper connection assembly provided by the embodiment of the present invention is shown in FIG. Figure 2 .

[0024] Figure 5 It is a schematic structural diagram of an elastic fastening member provided in an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the support ear provided in an embodiment of the present invention.

[0026] Figure 7 The structure of the lower connection assembly provided by the embodiment of the present invention is shown in FIG. Figure 1 .

[0027] Figure 8 The structure of the lower connection assembly provided by the embodiment of the present invention is shown in FIG. Figure 2 (Connecting shaft two is not shown).

[0028] Fig. 9 It is a schematic structural diagram of a lower protective cover provided in an embodiment of the present invention.

[0029] Fig.10 It is a schematic structural diagram of the guide wheel, bogie frame and protective cover provided in an embodiment of the present invention.

[0030] Figure numerals: 1, upper protective cover; 2, lower protective cover; 3, bogie frame; 4, guide wheel; 5, side drainage area; 6, top drainage area; 7, side drainage platform; 8, top drainage platform; 9, inner end surface one; 10, top connecting platform; 11, side connecting platform; 12, upper end surface one; 13, upper end surface two; 14, inner end surface two; 15, side edge one; 16, side edge two; 17, anti-shrinkage groove one; 18, give way groove; 19, concave section; 20, reinforcing rib two; 21, upper connecting assembly; 22, lower connecting assembly; 23, connecting shaft one; 24, support frame one; 25, upper opening and closing spring sheet; 26, lower supporting spring sheet; 27, support frame two; 28, bottom bracket; 29, upper support Frame; 30, clamping piece; 31, support section; 32, clamping section; 33, elastic fastening member; 34, clamping sleeve; 35, upper support frame; 36, lower support frame; 37, side support plate; 38, support ear; 39, upper convex arc section; 40, lower concave arc section one; 41, lower convex arc section one; 42, lower straight surface section one; 43, lower concave arc section two; 44, lower convex arc section two; 45, lower straight surface section two; 46, main bracket; 47, side bracket; 48, connecting platform; 49, accommodating groove; 50, connecting column; 51, earring; 52, connecting shaft two; 53, anti-interference groove; 54, arc surface section one; 55, arc surface section two; 56, arc surface section three; 57, bottom vertical section; 58, upper inclined section; 59, mounting plate. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following Figure 1-10 It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0032] A connecting structure for a guide wheel protective cover, comprising an upper connecting assembly 21 and a lower connecting assembly 22 arranged between the protective cover and a bogie frame 3, wherein the upper connecting assembly 21 and the lower connecting assembly 22 are both located on the inner side of the protective cover and the upper connecting assembly 21 is placed above the lower connecting assembly 22; a guide wheel protective cover is connected via the connecting structure.

[0033] like Fig.10 As shown, the guide wheel protective cover includes an upper protective cover 1 and a lower protective cover 2 connected to the bogie frame 3, the upper protective cover 1 is rotatably connected to the bogie frame 3 through the above-mentioned connection structure and can be opened and closed up and down, and the lower protective cover 2 is fixedly connected to the bogie frame 3 through bolts; the inner end surface 9 of the upper protective cover 1 close to the bogie frame 3 is a straight surface structure perpendicular to the upper end surface 12 of the guide wheel 4, the upper protective cover 1 includes a side drainage area 5 and a top drainage area 6 located on the upper part of the side drainage area 5, and the side drainage area 5 and the top drainage area 6 are both extended from the inner end surface 9 to the side away from the bogie frame 3.

[0034] The side drainage area 5 and the top drainage area 6 include a side drainage platform 7 and a top drainage platform 8, respectively. The side drainage platform 7 and the top drainage platform 8 are respectively arranged to be inclined downward toward both sides of the guide wheel 4; the top drainage platform 8 is formed by extending from the upper end of the inner end surface 9 toward the oblique upper direction, and the top drainage area 6 also includes a top connecting platform 10 formed by extending downward from the end of the top drainage platform 8 on the side away from the inner end surface 9; the side drainage platform 7 is connected to the lower end of the top connecting platform 10, and the side drainage area 5 also includes a side connecting platform 11 arranged at the lower end of the side drainage platform 7; the top connecting platform 10 and the side drainage platform 7 are both arc-shaped structures protruding away from the inner side surface, so as to facilitate the discharge of accumulated water and dust.

[0035] The lower protective cover 2 is located below the top drainage platform 8 and is inclined and extended toward the outer side of the guide wheel 4 on the side away from the side drainage platform 7. The accumulated water on the side drainage platform 7 flows downward into the outer side of the guide wheel 4, and the accumulated water on the top drainage platform 8 first flows downward into the lower protective cover 2, and then flows into the outer side of the guide wheel 4 from the side away from the side drainage platform 7 through the lower protective cover 2; the accumulated water and dust on the side drainage platform 7 and the top drainage platform 8 are respectively discharged toward the two sides of the guide wheel 4, further enhancing the dispersion and discharge capabilities of the accumulated water and dust, preventing the accumulated water and dust from corroding the guide wheel 4 and the bogie frame 5, so as to improve the service life and performance of the guide wheel 4 and the bogie frame 5.

[0036] like Fig.10As shown, the angle α between the arc top of the top connecting platform 10 and the upper end surface 12 of the guide wheel 4 is greater than the angle β between the arc top of the side drainage platform 7 and the upper end surface 12 of the guide wheel 4, which facilitates the accumulation of water and dust at the top connecting platform 10 to fall and be discharged to the outside of the guide wheel 4 along the side drainage platform 7; the lower end of the side connecting platform 11 is located above the side edge 15 of the guide wheel 4, and the side edge 15 is inclined downward, that is, the lower end of the side connecting platform 11 will not be arranged above the upper end surface 12 of the guide wheel 4, so as to ensure that the accumulated water and dust on the upper protective cover 1 are directly discharged to the outside of the guide wheel 4 along the side edge 15 and will not fall on the upper end surface 12 of the guide wheel 4, and the lower end of the side connecting platform 11 will not be arranged on the side edge 15, that is, the outside of the guide wheel 4, so as to avoid interference with the guide rail.

[0037] The inner end face 2 14 of the lower protective cover 2 away from the bogie frame 3 is located below the top drainage platform 8 and at one-third to one-half of the top drainage platform 8, so as to ensure that the accumulated water and dust on the top drainage platform 8 can completely fall onto the lower protective cover 2 and avoid falling onto the upper end face 12 of the guide wheel 4; the upper end face 13 of the lower protective cover 2 is an inclined structure inclined downward from the upper end of the inner end face 14 toward the outer side of the guide wheel 4, and the side end of the lower protective cover 2 away from the inner end face 14 is located above the side edge 2 16 of the guide wheel 4 away from the side drainage area 5, so as to ensure that the accumulated water and dust on the upper protective cover 1 are directly discharged to the outer side of the guide wheel 4 along the side edge 2 16 and will not fall onto the upper end face 12 of the guide wheel 4, and can avoid interference with the guide rail.

[0038] The upper and lower ends of the top drainage platform 8 are respectively provided with an anti-shrinkage groove 1 17 and an anti-shrinkage groove 2. The anti-shrinkage groove 1 17 is located in the middle away from the top connecting platform 10. The anti-shrinkage groove 1 17 and the anti-shrinkage groove 2 prevent the upper protective cover 1 from shrinking during use, thereby increasing the service life of the upper protective cover 1; a reinforcing rib 1 is also provided at the lower end of the top drainage platform 8 to improve the supporting force and structural quality of the upper protective cover 1; a clearance groove 18 is also provided on the top drainage platform 8 and the top connecting platform 10 to provide space for the connection between the upper protective cover 1 and the upper connecting component 21.

[0039] The inner end surface 14 of the lower protective cover 2 includes a concave section 19 that is concave toward the bogie frame 3, which can avoid interference between the bogie frame 5 and the lower protective cover 2 and the upper protective cover 1; Fig. 9 As shown, a reinforcing rib 20 is provided at the lower end of the upper end surface 13 of the lower protective cover 2 to improve the structural support stability of the lower protective cover 2.

[0040] like Figure 1-4 As shown, the upper connecting assembly 21 includes a connecting shaft 23, a support frame 24 fixed below the connecting shaft 23, and an elastic fastening member 33 located between the connecting shaft 23 and the support frame 24; Figure 3 As shown, the support frame 24 includes an upper support frame 35, a lower support frame 36 and a side support plate 37 connected between the upper support frame 35 and the lower support frame 36, and the side support plate 37 is located on the side ends of the upper support frame 35 and the lower support frame 36 away from the connecting shaft 23; the lower support frame 36 is provided with an anti-interference groove 53 to avoid interference with the bogie frame 5.

[0041] The side support plate 37 is inclined from top to bottom along the side end of the upper support frame 35 toward the side end of the lower support frame 51; the upper support frame 35 includes a main bracket 46 and a side bracket 47 symmetrically connected to the two side ends of the main bracket 46, and the upper part of the side support plate 37 extends outward with a connecting platform 48, and the free end of the side bracket 47 is connected to the connecting platform 48. The connecting platform can increase the frame space of the upper support frame 35 to avoid interference. At the same time, it can enhance the reliability of the connection between the side bracket 47 and the side support plate 37; the side support plate 37, the upper support frame 35 and the lower support frame 51 can improve the connection stability of the upper protective cover 1, and can avoid interference between the upper protective cover 1 and the lower protective cover 2 and the bogie frame 5.

[0042] like Figure 3 and Figure 6 As shown, a support ear 38 with an ear hole is provided on the upper support frame 35, and a connecting shaft 23 is inserted into the ear hole; the elastic fastening member 33 is located on the upper support frame 35 and is located on the side of the support ear 38; the support ear 38 includes a connecting column 50 fixed on the main bracket 46 and an earring 51 located on the connecting column 50, and the ear hole is formed by the inner hole of the earring 51; the support ears 38 include at least two and are arranged on both sides of the elastic fastening member 33; the connecting shaft 23 is vertically arranged with the upper end surface 12 of the guide wheel 4, the connecting shaft 23 is inserted into the ear hole of the earring 51 in the support frame 24, and the two ends of the connecting shaft 23 are mounted in the connecting hole group 1 of the protective cover, and the support frame 24 is connected to the bogie frame 3 away from the lower support frame 36 of the connecting shaft 23.

[0043] like Figure 3 and Figure 5 As shown, the elastic clamping member 33 includes a lower supporting spring piece 26 and an upper opening and closing spring piece 25 of a multi-arc surface segment combination structure; the lower supporting spring piece 26 and the upper opening and closing spring piece 25 are both fixed on the upper supporting frame 35 and the upper opening and closing spring piece 25 is located at the upper end of the lower supporting spring piece 26; the overall length of the upper opening and closing spring piece 25 is 2-4 times the overall length of the lower supporting spring piece 26, which can not only provide the supporting force of the lower supporting spring piece 26 on the upper opening and closing spring piece 25, but also prevent the supporting force from being too large and causing the rigidity of the upper opening and closing spring piece 25 to be too large, thereby ensuring the clamping force and auxiliary opening and closing force of the upper opening and closing spring piece 25 on the upper protective cover 1.

[0044] The upper opening and closing spring piece 25 includes, from top to bottom, an upper convex arc segment 39, a lower concave arc segment 40 and a lower convex arc segment 41, and the lower convex arc segment 41 is connected to the upper support plate through a lower straight surface segment 42; the lower support spring piece 26 includes a lower concave arc segment 43 and a lower convex arc segment 44, and the lower concave arc segment 43 and the lower convex arc segment 44 are respectively matched and connected to the lower ends of the lower concave arc segment 40 and the lower convex arc segment 41, and the lower convex arc segment 44 is connected to the upper support plate through a lower straight surface segment 45; the upper convex arc segment 39, the lower convex arc segment 41 and the lower concave arc segment 43 are all protruding toward the side away from the lower support frame 51, and the lower concave arc segment 40 and the lower concave arc segment 43 are both protruding toward the lower support frame 51. When the upper protective cover 1 contacts with the upper opening and closing spring piece 25, the upper protective cover 1 just contacts with the upper convex arc segment 39 of the convex upward protective cover 1, so as to realize the pressing force and auxiliary opening and closing force of the opening and closing spring piece 25 on the upper protective cover 1; a receiving groove 49 is provided in the middle of the main bracket 46, and the upper opening and closing spring piece 25 and the lower supporting spring piece 26 are arranged at the receiving groove 49. When the upper protective cover 1 is closed, the upper opening and closing spring piece 25 and the lower supporting spring piece 26 are pressed downward, and at this time, the receiving groove 49 can provide a receiving space for the upper opening and closing spring piece 25 and the lower supporting spring piece 26.

[0045] like Figure 1 , 7 As shown in 8, the lower connecting assembly 22 includes a connecting shaft 252, a support frame 27 located below the connecting shaft 52, and a clamping sleeve 34 fixed on the support frame 27; both ends of the connecting shaft 52 are mounted in the connecting hole group 2 of the upper protective cover 1; the support frame 27 includes a bottom bracket 28 and an upper bracket 29 vertically supported on the bottom bracket 28; the bottom bracket 28 in the support frame 27 away from the connecting shaft 52 is connected to the bogie frame 3; the upper protective cover 1 can be clamped or opened in the clamping sleeve 34 through the connecting shaft 52.

[0046] The upper bracket 29 includes a bottom vertical section 57 connected to the bottom bracket 28 and an upper inclined section 58 located on the side of the bottom vertical section 57 away from the bottom bracket 28. The upper inclined section 58 is inclined from the end of the bottom vertical section 57 toward the side away from the connecting shaft 2 52 to increase the connection space and avoid interference. A mounting plate 59 is provided at the end of the arc surface section 1 54, and the clamping sleeve 34 is fixed to the upper inclined section 58 through the mounting plate 59. When the clamping sleeve 34 needs to be repaired or replaced, it can be achieved by disassembling or loading and unloading the mounting plate 59, which is simple and quick and can reduce costs.

[0047] like Figure 7 , 8As shown, the clamping sleeve 34 includes two symmetrically arranged clamping plates 30, and the clamping plates 30 include a support segment 31 of a straight surface structure and a clamping segment 32 of a multi-arc surface segment structure in sequence from the support frame 27 toward the outside; the support segment 31 is connected to the support frame 27 through the arc surface segment 1 54, and the arc surface segment 1 54 can increase the telescopic space of the clamping plate 30; the upper protective cover 1 can be clamped or opened in the clamping segment 32 through the connecting shaft 2 52.

[0048] The clamping section 32 includes an arc surface section 2 55 and an arc surface section 3 56, and the arc surface section 2 55 is connected to the supporting section 31; the arc surface section 1 54 and the arc surface section 2 55 both protrude toward the side away from the central axis of the clamping sleeve 34, and the arc surface section 3 56 protrudes toward the central axis of the clamping sleeve 34; the protective cover can be clamped or opened in the clamping groove formed by the arc surface sections 2 55 of the two clamping sleeves 34 through the connecting shaft 2 52.

[0049] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0050] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A connecting structure of a guide wheel protective cover, characterized in that: The vehicle comprises an upper connection assembly (21) and a lower connection assembly (22) which are arranged between the protective cover and the bogie frame (3), wherein the upper connection assembly (21) and the lower connection assembly (22) are both located inside the protective cover and the upper connection assembly (21) is placed above the lower connection assembly (22); The upper connecting assembly (21) comprises a connecting shaft (23), a support frame (24) fixed below the connecting shaft (23), and an elastic fastening member (33) located between the connecting shaft (23) and the support frame (24); the connecting shaft (23) is inserted into the support frame (24) and both ends of the connecting shaft (23) are mounted in a connecting hole group (1) of the protective cover, and the side of the support frame (24) away from the connecting shaft (23) is connected to the bogie frame (3); The lower connection assembly (22) comprises a second connection shaft (52), a second support frame (27) located below the second connection shaft (52), and a clamping sleeve (34) fixed to the second support frame (27); both ends of the second connection shaft (52) are mounted in a second connection hole group of the protective cover, and a side of the second support frame (27) away from the second connection shaft (52) is connected to the bogie frame (3); the protective cover can be clamped or opened in the clamping sleeve (34) through the second connection shaft (52).

2. The connecting structure of the guide wheel protective cover according to claim 1 is characterized in that: The support frame (24) comprises an upper support frame (35), a lower support frame (36) and a side support plate (37) connected between the upper support frame (35) and the lower support frame (36), wherein the side support plate (37) is located on the side ends of the upper support frame (35) and the lower support frame (36) away from the connecting shaft (23); the upper support frame (35) is provided with a support ear (38) with an ear hole, and the connecting shaft (23) is passed through the ear hole; and the elastic fastening member (33) is located on the upper support frame (35) and on the side of the support ear (38).

3. The connecting structure of the guide wheel protective cover according to claim 2 is characterized in that: The elastic abutting member (33) comprises a lower supporting spring piece (26) and an upper opening and closing spring piece (25) of a multi-arc segment combined structure; the lower supporting spring piece (26) and the upper opening and closing spring piece (25) are both fixed on the upper supporting frame (35), and the upper opening and closing spring piece (25) is located at the upper end of the lower supporting spring piece (26); the overall length of the upper opening and closing spring piece (25) is 2-4 times the overall length of the lower supporting spring piece (26).

4. The connecting structure of the guide wheel protective cover according to claim 3 is characterized in that: The upper opening and closing spring piece (25) comprises, from top to bottom, an upper convex arc segment (39), a lower concave arc segment 1 (40) and a lower convex arc segment 1 (41), wherein the lower convex arc segment 1 (41) is connected to the upper support plate via a lower straight surface segment 1 (42); the lower support spring piece (26) comprises a lower concave arc segment 2 (43) and a lower convex arc segment 2 (44), and the lower concave arc segment 2 (43) and the lower convex arc segment 2 (44) are matched and connected to the lower ends of the lower concave arc segment 1 (40) and the lower convex arc segment 1 (41), respectively, and the lower convex arc segment 2 (44) is connected to the upper support plate via a lower straight surface segment 2 (45); the upper convex arc segment (39), the lower convex arc segment 1 (41) and the lower concave arc segment 2 (43) are all protruding toward a side away from the lower support frame (36), and the lower concave arc segment 1 (40) and the lower concave arc segment 2 (43) are both protruding toward the lower support frame (36).

5. The connecting structure of the guide wheel protective cover according to claim 4 is characterized in that: The side support plate (37) is arranged obliquely from top to bottom along the side end of the upper support frame (35) toward the side end of the lower support frame (36); the upper support frame (35) comprises a main support (46) and side supports (47) symmetrically connected to both side ends of the main support (46); a connecting platform (48) is extended outward from the upper part of the side support plate (37); and a free end of the side support (47) is connected to the connecting platform (48); a receiving groove (49) is provided in the middle part of the main support (46); an upper opening and closing spring sheet (25) and a lower supporting spring sheet (26) are arranged at the receiving groove (49).

6. The connecting structure of the guide wheel protective cover according to claim 5, characterized in that: The supporting ear (38) comprises a connecting column (50) fixed on the main bracket (46) and an earring (51) located on the connecting column (50), and the ear hole is formed by the inner hole of the earring (51); the supporting ear (38) comprises at least two and is arranged on both sides of the elastic abutting member (33); the connecting shaft (23) is arranged perpendicular to the upper end surface (12) of the guide wheel (4).

7. The connecting structure of the guide wheel protective cover according to any one of claims 1 to 6, characterized in that: The clamping sleeve (34) comprises two symmetrically arranged clamping pieces (30), the clamping piece (30) comprising, from the second support frame (27) toward the outside, a support section (31) of a straight surface structure and a clamping section (32) of a multi-arc surface section structure; the support section (31) is connected to the second support frame (27) via the first arc surface section (54); the protective cover can be clamped or opened in the clamping section (32) via the second connecting shaft (52).

8. The connecting structure of the guide wheel protective cover according to claim 7, characterized in that: The clamping section (32) comprises an arc surface section 2 (55) and an arc surface section 3 (56); the arc surface section 2 (55) is connected to the support section (31); the arc surface section 1 (54) and the arc surface section 2 (55) both protrude toward a side away from the central axis of the clamping sleeve (34); the arc surface section 3 (56) protrudes toward the central axis of the clamping sleeve (34); the protective cover can be clamped or opened in a clamping groove formed by the arc surface sections 2 (55) of the two clamping sleeves (34) through the connecting shaft 2 (52).

9. The connecting structure of the guide wheel protective cover according to claim 8, characterized in that: The second support frame (27) comprises a bottom support (28) and an upper support (29) vertically supported on the bottom support (28); the upper support (29) comprises a bottom vertical section (57) connected to the bottom support (28) and an upper inclined section (58) located on a side of the bottom vertical section (57) away from the bottom support (28); the upper inclined section (58) is inclined from an end of the bottom vertical section (57) toward a side away from the second connection axis (52); A mounting plate (59) is provided at the end of the arc surface segment one (54), and the clamping sleeve (34) is fixed to the upper inclined segment (58) via the mounting plate (59).

10. A guide wheel protective cover, characterized in that: A connection structure comprising any one of claims 1 to 9.

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