Improved structure of through passage cab apron of electric passenger car

Abstract

The utility model discloses an improved structure of an electric passenger car through passage cab apron, which belongs to the field of train cab aprons, and is characterized in that firstly, a connecting bolt at the joint of an inserting hole of a shear type stretching mechanism and an inserting hole of a locking mechanism is improved, so that a metal sheath section is rotationally connected onto a sleeving section of the connecting bolt; the friction wear probability is reduced, the service life is prolonged, each arc-shaped wear strip unit of the wear strip mechanism is supported through a second supporting spring and then installed on the cab apron body through an installation screw, and therefore each arc-shaped wear strip unit is of a floating type installation structure; the arc-shaped abrasion strip units can better fluctuate along with the up-and-down fluctuation of the connecting positions of the adjacent carriages, the arc-shaped abrasion strip units make lap joint contact with the lap joint positions of the adjacent carriages, the abrasion uniformity of the arc-shaped abrasion strip units is improved, the service life of the arc-shaped abrasion strip units is prolonged, and the maintenance and replacement probability is reduced.

Description

Technical Field

[0001] The utility model relates to the field of train boarding plates, and more specifically, to an improved structure of a through-channel boarding plate for electric multiple units (EMUs). Background Art

[0002] In an urban rail transit system, the through-channel boarding plate of an EMU plays a crucial connecting role. It can not only connect the joints of two EMU carriages, improve the integrity and sealing performance at the through-channel, but also cover the decoupling of the connection between the two carriages at the through-channel to prevent passengers from stepping into the void and falling, thus enhancing the safety during operation.

[0003] The installation structure of the boarding plate mainly includes locking mechanisms installed at both ends of the bottom of the boarding plate, and a wire is connected to the pull rod of the locking mechanism, facilitating the unlocking function of the corresponding locking mechanism by pulling the wire. The internal of the jacks of the two locking mechanisms are also detachably connected with a shear-force pull rod mechanism through a locking connection pile, and both ends of the shear-force pull rod mechanism are fixedly installed at the edges of the two carriages through bolts.

[0004] To improve the convenience of disassembling and assembling the boarding plate, the shear-force pull rod mechanism is usually directly inserted into the jack of the locking mechanism through a screw with a hemispherical limiting pile at the head, so that the locking block of the locking mechanism can clamp the neck position of the screw, and the hemispherical limiting pile is used for limiting and preventing falling off. Such a structure is simple, but the locking block usually directly contacts the neck position of the screw. With the rotation of the screw driven by the shear-force pull rod mechanism during operation, it is easy to cause excessive wear at the neck position of the screw, and then lead to fracture, increasing the maintenance probability of this connection and making it inconvenient to use; at the same time, the wear strips installed at the bottom of the boarding plate are usually directly installed in the form of a whole at the bottom of the boarding plate. With the up-and-down undulation of the connection between adjacent carriages during the operation of the EMU, the wear strips are prone to uneven contact with the overlapping part, and excessive wear is likely to occur in some areas, which is not conducive to improving the service life of the wear strips. Therefore, we propose an improved structure of a through-channel boarding plate for EMUs to solve the above existing problems. Summary of the Utility Model

[0005] 1. Technical Problems to be Solved

[0006] Aiming at the problems existing in the prior art, the purpose of the present utility model is to provide an improved structure for the gangway transition plate of an electric passenger car. Firstly, the connecting bolts at the connection between the shear-type tension mechanism and the jack of the locking mechanism are improved, so that a metal sheath section is rotatably connected to the socket section of the connecting bolt. Through the metal sheath section, it is then in contact connection with the hypotenuse section of the locking block, making the connection part have the structural characteristics of rotational connection, avoiding direct contact connection between the hypotenuse section of the locking block and the socket section of the connecting bolt, reducing the probability of friction and wear, and improving the service life. And each arc wear strip unit of the wear strip mechanism is supported by a second support spring and then installed on the transition plate body through installation screws, so that each arc wear strip unit realizes a floating installation structure, which can better follow the up and down fluctuations at the connection of adjacent carriages, and the arc wear strip unit makes lap contact with the lap joint between adjacent carriages, improving the wear uniformity and service life of the arc wear strip unit and reducing the probability of maintenance and replacement.

[0007] 2. Technical solution

[0008] To solve the above problems, the present utility model adopts the following technical solutions.

[0009] An improved structure for the gangway transition plate of an electric passenger car, including a transition plate body. At both ends of the transition plate body, locking mechanisms with the same structure are provided, and on both of the locking mechanisms, shear rod mechanisms with the same structure are provided. At the central position of the transition plate body, a wear strip mechanism is provided;

[0010] The locking mechanism includes a housing fixedly installed on the transition plate body through bolts. A locking block is slidably connected inside the housing. One side of the locking block is fixedly welded with an unlocking pull rod, and one end of the unlocking pull rod penetrates to the outside of the housing. A cover plate is also fixedly installed on the housing through screws, and a jack is opened on the cover plate;

[0011] The shear rod mechanism includes a shear-type tension mechanism and pull rods installed at both ends of the shear-type tension mechanism through screws. A connecting bolt is provided on the hole at the central position of the shear-type tension mechanism. The shear-type tension mechanism is detachably connected to the inside of the corresponding jack through the connecting bolt;

[0012] The wear strip mechanism includes a number of arc wear strip units with the same structure, and a number of the arc wear strip units are connected end to end to form an annular structure.

[0013] Further, a hypotenuse section is opened on the locking block, and sliding edge sections fixedly welded on both sides of the locking block. Sliding grooves are opened on both sides of the housing. The locking block is slidably connected to the inside of the corresponding sliding groove through the sliding edge sections. A first support spring is sleeved on the unlocking pull rod located inside the housing.

[0014] Further, the connecting bolt includes a connecting section and a socket section. A first gasket is fixedly welded between the connecting section and the socket section. The connecting section is inserted into the hole at the central position of the shear-type stretching mechanism, and a second gasket and a nut are fixedly installed at the bottom of the connecting section. A metal sheath section is sleeved outside the socket section, and a hemispherical pressing head is fixedly installed at the top of the socket section through a bolt. The hemispherical pressing head is inserted into the housing through the jack, and the outside of the socket section is in contact with the edge of the hypotenuse section through the metal sheath section.

[0015] Further, both ends of the arc wear strip unit are opened with chamfered edges, and a sinking groove is opened at the bottom of the arc wear strip unit. A number of second support springs are fixedly installed inside the sinking groove. One end of the second support spring is in contact with the ferry plate body. Two first through holes are also opened on the arc wear strip unit, and a second through hole is opened on the ferry plate body at the position corresponding to the through hole. The first through hole and the second through hole are connected by mounting screws.

[0016] Further, a number of overlapping side plates are rotatably connected to the ferry plate body through a number of hinges.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present utility model are as follows:

[0019] (1) In this solution, first, the connecting bolt at the connection between the shear-type stretching mechanism and the jack of the locking mechanism is improved, so that a metal sheath section is rotatably connected to the socket section of the connecting bolt. The metal sheath section is then in contact connection with the hypotenuse section of the lock block, so that the connection part has the structural characteristics of rotational connection, avoiding direct contact connection between the hypotenuse section of the lock block and the socket section of the connecting bolt, reducing the probability of friction and wear, and improving the service life.

[0020] (2) In this solution, each arc wear strip unit of the wear strip mechanism is supported by a second support spring and then installed on the ferry plate body through mounting screws, so that each arc wear strip unit realizes a floating installation structure, which can better follow the up and down fluctuations at the connection of adjacent carriages, and the arc wear strip unit makes lap contact with the lap at the connection between adjacent carriages, improving the wear uniformity and service life of the arc wear strip unit, and reducing the probability of maintenance and replacement. Description of the drawings

[0021] Figure 1 is the overall structural schematic diagram of the present utility model;

[0022] Figure 2 is the split structural schematic diagram of the present utility model;

[0023] Figure 3 Schematic diagram of the internal structure of the housing of the present utility model;

[0024] Figure 4 Schematic diagram of the lock block structure of the present utility model;

[0025] Figure 5 Schematic diagram of the back structure of the shear tie rod mechanism of the present utility model;

[0026] Figure 6 Schematic diagram of the split structure of the connecting bolt of the present utility model;

[0027] Figure 7 Schematic diagram of the structure of the arc wear strip unit of the present utility model;

[0028] Figure 8 Schematic diagram of the back structure of the arc wear strip unit of the present utility model.

[0029] Explanation of the reference numerals in the figure:

[0030] 1. Transition plate body; 101. Lapping side plate;

[0031] 2. Locking mechanism; 201. Housing; 2011. Chute; 202. Lock block; 2021. Hypotenuse segment; 2022. Sliding side segment; 203. Unlocking pull rod; 204. Cover plate; 205. Insertion hole; 206. Support spring I;

[0032] 3. Shear tie rod mechanism; 301. Shear type stretching mechanism; 302. Tie rod;

[0033] 4. Wear strip mechanism; 401. Arc wear strip unit; 402. Chamfered edge; 403. Support spring II; 404. Through hole I;

[0034] 5. Connecting bolt; 501. Connecting segment; 502. Socket segment; 503. Gasket I; 504. Metal sheath segment; 505. Hemispherical pressing head. Specific implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings of the present utility model specification; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0036] Embodiment 1:

[0037] Please refer to Figures 1-8, An improved structure of the gangway step of an electric multiple unit, which includes a step body 1. Locking mechanisms 2 with the same structure are arranged at both ends of the step body 1, and shear rod mechanisms 3 with the same structure are arranged on both of the two locking mechanisms 2. A wear strip mechanism 4 is arranged at the center position of the step body 1;

[0038] The locking mechanism 2 includes a housing 201 fixedly installed on the step body 1 by bolts. A locking block 202 is slidably connected inside the housing 201. An unlocking rod 203 is fixedly welded to one side of the locking block 202, and one end of the unlocking rod 203 penetrates to the outside of the housing 201. A cover plate 204 is also fixedly installed on the housing 201 by screws. A jack 205 is provided on the cover plate 204. An inclined edge section 2021 is provided on the locking block 202, and sliding edge sections 2022 fixedly welded on both sides of the locking block 202 are provided. Sliding grooves 2011 are provided on both sides of the housing 201. The locking block 202 is slidably connected to the inside of the corresponding sliding groove 2011 through the sliding edge section 2022. A first support spring 206 is sleeved on the unlocking rod 203 located inside the housing 201. The connecting bolt 5 includes a connecting section 501 and a socket section 502. A first gasket 503 is fixedly welded between the connecting section 501 and the socket section 502. The connecting section 501 is inserted into the hole at the center position of the shear type stretching mechanism 301, and a second gasket and a nut are fixedly installed at the bottom of the connecting section 501. A metal sheath section 504 is sleeved on the outside of the socket section 502, and a hemispherical pressing head 505 is fixedly installed at the top of the socket section 502 by bolts. The hemispherical pressing head 505 is inserted into the inside of the housing 201 through the jack 205, and the outside of the socket section 502 is in contact with the edge of the inclined edge section 2021 through the metal sheath section 504;

[0039] The shear rod mechanism 3 includes a shear type stretching mechanism 301 and tie rods 302 installed at both ends of the shear type stretching mechanism 301 by screws. A connecting bolt 5 is arranged on the hole at the center position of the shear type stretching mechanism 301. The shear type stretching mechanism 301 is detachably connected to the inside of the corresponding jack 205 through the connecting bolt 5.

[0040] The installation process of the step body of this improved structure of the gangway step of an electric multiple unit is as follows:

[0041] First, insert the connecting bolt 5 through the connecting section 501 into the hole at the center position of the shear-type tension mechanism 301, and tighten the bottom of the connecting section 501 with the second gasket and nut to complete the installation of the connecting bolt 5 on the shear-type tension mechanism 301. Then, insert the shear rod mechanism 3 through the connecting bolt 5 into the jacking hole 205 of the corresponding locking mechanism 2, so that the hypotenuse section 2021 of the locking block 202 just catches on the outside of the metal sheath section 504 of the connecting bolt 5, and use the hemispherical pressing head 505 for limiting to prevent the connecting bolt 5 from falling off. Then, install the pull rod 302 of the shear rod mechanism 3 on the edge of the corresponding carriage with bolts to realize the connection between the shear rod mechanism 3 and the carriage edge. During this process, make the arc wear strip unit 401 of the wear strip mechanism 4 contact the corresponding carriage edge to achieve the effect of supporting and anti-friction. Finally, connect the unlocking pull rod 203 of the locking mechanism 2 with the unlocking wire at the corresponding position, which is convenient for unlocking the locking mechanism 2 when disassembling the boarding bridge body 1;

[0042] When the electric multiple unit runs, since the metal sheath section 504 is sleeved on the socket section 502 of the connecting bolt 5, at this time, the hypotenuse section 2021 of the locking block 202 can achieve the effect of rotational connection and contact with the socket section 502, reducing the probability of wear. At the same time, the arc wear strip unit 401 can be installed in a floating manner through the support spring two 403, which is beneficial to improving the uniformity of wear at the contact part.

[0043] Embodiment 2:

[0044] In view of the above Embodiment 1, a further description is made. Refer to Figure 1 、 Figure 7 and Figure 8 , the wear strip mechanism 4 includes a plurality of arc wear strip units 401 with the same structure, and the plurality of arc wear strip units 401 are connected end to end to form a ring structure. Both ends of the arc wear strip unit 401 are provided with chamfered edges 402, and a sinking groove is opened at the bottom of the arc wear strip unit 401. A plurality of support springs two 403 are fixedly installed inside the sinking groove. One end of the support spring two 403 contacts the boarding bridge body 1. Two through holes one 404 are also opened on the arc wear strip unit 401, and through holes two are opened on the boarding bridge body 1 at the corresponding through hole positions. The through hole one 404 and the through hole two are connected by installation screws. A plurality of overlapping side plates 101 are rotatably connected to the boarding bridge body 1 through a plurality of hinges.

[0045] The wear strip mechanism 4 includes a plurality of arc-shaped wear strip units 401 with the same structure, and the plurality of arc-shaped wear strip units 401 are connected end to end to form an annular structure, which will not interfere with the tensile rotation of the shear tie rod mechanism 3. In addition, the arc-shaped wear strip unit 401 can also be installed in a floating manner through the support spring two 403, which is beneficial to improving the uniformity of wear at the contact part.

[0046] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An improved structure of the gangway step of an electric multiple unit, comprising a step body (1), characterized in that: Both ends of the boarding plate body (1) are provided with locking mechanisms (2) with the same structure, and shear tie rod mechanisms (3) with the same structure are arranged on both of the locking mechanisms (2). A wear strip mechanism (4) is arranged at the center position of the boarding plate body (1). The locking mechanism (2) includes a housing (201) fixedly installed on the boarding plate body (1) by bolts. A lock block (202) is slidably connected inside the housing (201). One side of the lock block (202) is fixedly welded with an unlocking pull rod (203), and one end of the unlocking pull rod (203) penetrates to the outside of the housing (201). A cover plate (204) is also fixedly installed on the housing (201) by screws. A jack (205) is opened on the cover plate (204). The shear tie rod mechanism (3) includes a shear type stretching mechanism (301) and tie rods (302) installed at both ends of the shear type stretching mechanism (301) by screws. A connecting bolt (5) is arranged on the hole at the center position of the shear type stretching mechanism (301). The shear type stretching mechanism (301) is detachably connected to the inside of the corresponding jack (205) through the connecting bolt (5). The wear strip mechanism (4) includes a plurality of arc-shaped wear strip units (401) with the same structure, and the plurality of arc-shaped wear strip units (401) are connected end to end to form an annular structure.

2. The improved structure of the gangway flap of an electric passenger car according to claim 1, characterized in that: The lock block (202) is provided with a hypotenuse section (2021) and sliding edge sections (2022) fixedly welded on both sides of the lock block (202). Chute grooves (2011) are opened on both sides of the housing (201). The lock block (202) is slidably connected to the inside of the corresponding chute groove (2011) through the sliding edge sections (2022). A first support spring (206) is sleeved on the unlocking pull rod (203) located inside the housing (201).

3. An improved structure of the gangway tread plate of an electric multiple unit, as claimed in claim 2, wherein: The connecting bolt (5) includes a connecting section (501) and a socket section (502). A first gasket (503) is fixedly welded between the connecting section (501) and the socket section (502). The connecting section (501) is inserted into the hole at the center position of the shear type stretching mechanism (301). A second gasket and a nut are fixedly installed at the bottom of the connecting section (501). A metal sheath section (504) is sleeved on the outside of the socket section (502). A hemispherical pressing head (505) is fixedly installed at the top of the socket section (502) by bolts. The hemispherical pressing head (505) is inserted into the inside of the housing (201) through the jack (205). The outside of the socket section (502) is in contact with the edge of the hypotenuse section (2021) through the metal sheath section (504).

4. An improved structure of the gangway step of an electric passenger car according to claim 1, characterized in that: Both ends of the arc-shaped wear strip unit (401) are provided with chamfered edges (402), and a sunken groove is formed at the bottom of the arc-shaped wear strip unit (401). A plurality of second support springs (403) are fixedly installed inside the sunken groove. One end of the second support spring (403) is in contact with the ferry plate body (1). Two first through holes (404) are also formed on the arc-shaped wear strip unit (401). A second through hole is formed on the ferry plate body (1) corresponding to the position of the first through hole (404). The first through hole (404) and the second through hole are connected by installation screws.

5. An improved structure of the gangway step of an electric passenger car according to claim 1, characterized in that: A plurality of overlapping side plates (101) are rotatably connected to the ferry plate body (1) through a plurality of hinges.

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