Opening and closing structure of the side door panel of the carriage

Abstract

The present invention relates to the field of automobile manufacturing, and discloses an opening and closing structure for a side door panel of a carriage. It includes a jacking unit, a locking unit, and a plurality of hanging units; a plurality of first locking blocks are fixed to the bottom of the vehicle body girder, and a slideway is fixed to the upper end of the side door panel of the carriage; the jacking unit includes a first shaft, the first shaft is rotatably arranged on the front side of the vehicle body girder, and a plurality of jacking rods and a plurality of positioning plates are fixed to the first shaft; the locking unit includes a second shaft, the second shaft is rotatably arranged on the rear side of the vehicle body girder, and a plurality of rotating handles and a plurality of limit posts are fixed to the second shaft, and a second locking block is fixed to each rotating handle; each hanging unit includes a slider and a hanging part. The present invention realizes the side-opening mode of the side door panel of the carriage. At the same time, the side door panels on the same side can be opened by sliding only in one slideway, without affecting other side door panels in the same slideway.

Description

Technical Field

[0001] The present invention relates to the field of automobile manufacturing, and particularly to an opening and closing structure of a side door panel of a carriage. Background Art

[0002] At present, most side door panels of carriages are opened outwards. This way of opening the door has high space requirements. In some relatively narrow alleys, due to space limitations, the side door panel of the carriage cannot be fully opened. When loading and unloading goods, the goods are likely to bump against the side door panel of the carriage, resulting in damage to the side door panel of the carriage. At the same time, when loading and unloading workers are loading and unloading goods, they are easily scratched by the side door panel of the carriage. Therefore, the side door panel of this structure brings great inconvenience to users and urgently needs improvement. Summary of the Invention

[0003] The present invention aims to provide an opening and closing structure of a side door panel of a carriage to achieve the side-opening mode of the side door panel of the carriage. At the same time, the side door panels on the same side of the carriage can slide in only one slideway to open the side door panel of the carriage without affecting other side door panels in the same slideway.

[0004] To achieve the above object, the present invention adopts the following technical solution: An opening and closing structure of a side door panel of a carriage, comprising a jacking unit, a locking unit, and a plurality of hanging units; a plurality of first locking blocks are fixed at the bottom of the body girder, and a slideway is fixed at the upper end of the side door panel of the carriage. The slideway includes an installation part and a sliding part connected in sequence; a groove is opened at the bottom of the side door panel of the carriage; the jacking unit includes a first shaft, the first shaft is rotatably arranged on the front side of the body girder, a plurality of jacking rods are fixed on the first shaft, and a plurality of positioning plates are also fixed on the first shaft. The free end of the positioning plate is located at the rear side of the body girder; the locking unit includes a second shaft, the second shaft is rotatably arranged on the rear side of the body girder, a plurality of rotating handles are fixed on the second shaft, and a second locking block cooperating with the first locking block is fixed on each rotating handle. A limiting column is fixed on the second shaft. By rotating the second shaft, the limiting column can abut against the positioning plate; each hanging unit includes a slider and a hanging part; a T-shaped groove is opened at the bottom of the slider, and the top of the slider is fixedly connected with the installation part; the hanging part includes a Z-shaped connecting bar, a sliding column, and a rolling member. One end of the Z-shaped connecting bar is fixed at the upper end of the side door panel of the carriage. The free end of the Z-shaped connecting bar is fixedly connected with a rotating shaft, the rolling member is rotatably connected with the rotating shaft, the free end of the Z-shaped connecting bar is fixedly connected with a guiding bar, the sliding column is horizontally fixed at the other end of the guiding bar, and after the sliding column slides out of the T-shaped groove, the rolling member slides into the sliding part.

[0005] The beneficial effects of this solution are as follows:

[0006] The opening process of the car side door panel: when the car side door panel is in a closed state, the lifting rod is supported in the groove at the bottom of the car side door panel, the first locking block and the second locking block are in a locked state, the sliding column is located inside the T-slot, and the rolling part is disengaged from the sliding part. When the car side door panel needs to be opened, the first locking block and the second locking block are opened, and the rotating handle is turned backward. The rotation of the rotating handle drives the second shaft to rotate counterclockwise, and the rotation of the second shaft drives the limit column to rotate synchronously, so that the limit column leaves the surface of the positioning plate, and the constraint of the limit column on the positioning plate is released; the first shaft is rotated counterclockwise, and the rotation of the first shaft drives the lifting rod and the positioning plate to rotate synchronously. The rotation of the lifting rod drives the car side door panel to tilt outward and move downward, so that the lifting rod slides out from the front end of the groove at the bottom of the car side door panel. The carriage side door panel moves downward, driving the slide column and the rolling element on the guide strip to move synchronously, causing the slide column to slide out from the inside of the T-slot, and the rolling element to slide to the sliding part. At this time, the slide columns on other carriage side door panels in the same slideway are located inside the T-slot and are in a closed state. Push or pull the carriage side door panel, and the carriage side door panel can slide on the sliding part.

[0007] The closing process of the carriage side door panel: when the carriage side door panel needs to be closed, the carriage side door panel is pushed and pulled so that the sliding column is aligned with the T-slot, and the first shaft is rotated clockwise. The rotation of the first shaft drives the lifting rod and the positioning plate to rotate synchronously, so that the lifting rod slides into the front end of the carriage side door groove, and the rotating handle is rotated clockwise. The rotation of the rotating handle drives the second locking block and the second shaft to rotate synchronously, and the second shaft drives the limiting column to rotate synchronously, so that the limiting column abuts against the surface of the positioning plate, and the rotating handle continues to be rotated clockwise, and the limiting column continues to abut against the positioning plate to rotate, so that the second locking block is aligned with the first locking block. Since the limiting column abuts against the upper surface of the positioning plate, the limiting column drives the positioning plate to rotate clockwise while rotating, and the positioning plate drives the first shaft and the lifting rod to rotate synchronously clockwise, and the lifting rod drives the carriage side door panel to move upward, so that the rolling element disengages from the sliding portion on the slideway, and the carriage side door panel drives the sliding column on the guide strip to move toward the inside of the T-slot, and the carriage side door panel is closed, and the carriage side door panel is locked.

[0008] The carriage side door panel of the technical solution adopts a side-opening door mode, which solves the problem of space limitation when the carriage side door panel is opened.

[0009] After the carriage side door panel of the technical solution is opened, the carriage side door panel slides on the sliding part of the slideway. At this time, the rolling parts of other carriage side door panels in the same slideway are separated from the sliding part and are in a closed state. Therefore, the opened carriage side door panel can slide staggered with other carriage side door panels in the same slideway. The technical solution realizes that the carriage side door panel on the same side of the carriage can be opened by sliding in only one slideway without affecting other carriage side door panels in the same slideway.

[0010] Furthermore, each T-shaped groove includes two support portions. The front end of the inner side surface of each support portion is a first inclined surface, and the two first inclined surfaces form an outwardly expanding opening in the shape of an "eight".

[0011] The beneficial effect of this solution is that during the opening or closing process of the side door panel of the carriage, the guide bar needs to drive the sliding column to slide out or into the T-shaped groove. The guide bar is fixedly connected to the Z-shaped connecting bar, and the other end of the Z-shaped connecting bar is fixedly connected to the side door panel of the carriage. If the two first inclined surfaces form an inwardly expanding opening in the shape of an "eight", the two support portions will interfere with the guide bar, making it impossible for the guide bar to drive the sliding column to slide into the innermost part of the T-shaped groove, resulting in the side door panel of the carriage being unable to close completely, making the side door panel of the carriage unstable and prone to shaking.

[0012] Furthermore, the front side of each support portion is a second inclined surface.

[0013] The beneficial effect of this solution is that during the opening or closing process of the side door panel of the carriage, the guide bar needs to drive the sliding column to slide out or into the T-shaped groove. If the front end of the lower horizontal portion is not a first inclined surface, it is not easy for the sliding column to slide onto the lower horizontal portion, making it easy for the side door panel of the carriage to get stuck or difficult to close when closing, reducing the work efficiency.

[0014] Furthermore, each limit post includes a limit seat, a bolt, and a nut. The limit seat is fixed on the second shaft, the nut is fixed on the lower surface of the limit seat, and the bolt is threadedly connected to the nut and the limit seat in sequence.

[0015] The beneficial effect of this solution is that compared with directly fixing the nut on the second shaft, by fixing the limit seat above the nut, the bolt can be connected to the inside of the limit seat, connecting the limit seat, the nut, and the bolt into a whole, increasing the strength of the bolt and extending the service life of the bolt. At the same time, due to the long-term mutual friction between the bolt and the positioning plate, the bolt is worn. When the second through hole on the second locking block aligns with the first through hole on the first locking block, the bolt cannot be pressed tightly against the positioning plate, resulting in the positioning plate shaking up and down. The up and down shaking of the positioning plate will drive the first shaft to rotate, and when the first shaft rotates, it will drive the lifting rod to rotate, and the rotation of the lifting rod will drive the side door panel of the carriage to shake.

[0016] Furthermore, the lifting rod includes a fixing plate and a support column. The fixing plate is fixedly connected to the first shaft, and the support column is horizontally fixed at the upper end of the fixing plate.

[0017] The beneficial effects of this solution are as follows: Since the jacking rod needs to support the side door of the carriage and bear the pressure of the side door panel of the carriage, if the support column is directly fixed on the second shaft, due to the relatively small contact area between the support column and the second shaft, the support column is prone to break under the pressure of the side door panel of the carriage, resulting in a short service life; if the fixing plate is fixed on the second shaft and the support column is horizontally fixed on the fixing plate, due to the relatively large contact areas between the fixing plate and the second shaft and the support column, the jacking rod can stably support the side door of the carriage under the pressure of the side door panel of the carriage and is not prone to break; at the same time, since the support column is horizontally fixed at the upper end of the fixing plate, the friction between the support column and the bottom groove of the side door panel of the carriage can be effectively reduced, extending the service lives of the jacking rod and the side door panel of the carriage and improving the stability of the side door panel of the carriage.

[0018] Further, several concave sheet metals are fixed in the groove at the bottom of the side door panel of the carriage.

[0019] The beneficial effects of this solution are as follows: Compared with only having a groove under the side door panel of the carriage, when the support member directly slides into the groove under the side door panel of the carriage, long-term use will cause wear to the lower side of the side door panel of the carriage, affecting the service life of the side door panel of the carriage.

[0020] Further, a limiting plate is fixed on each positioning plate.

[0021] The beneficial effects of this solution are as follows: Since the limiting plate and the positioning plate form two L-shaped structures, the rear L-shaped structure enables the bottom surface of the limiting column to abut against the positioning plate and the side surface of the limiting column to abut against the limiting plate, so that the limiting column is not prone to deflection, improving the stability of the positioning plate. Since the limiting column and the rotating handle are both fixed on the second shaft, the second through hole on the second locking block can be ensured to be aligned with the first through hole on the first locking block, improving the locking efficiency; since the positioning plate is fixedly connected to the first shaft, the stability of the jacking rod is improved. Since the jacking rod supports the side door panel of the carriage, the stability of the side door panel of the carriage is further improved, making the side door panel of the carriage not prone to shaking.

[0022] Further, the rolling member includes a bearing and a roller. The bearing is in interference fit with the rotating shaft, and the roller on the bearing is in interference fit with the bearing.

[0023] The beneficial effects of this solution are as follows: If the rolling member is a bearing, since the bearing slides on the slideway, it will cause wear to the bearing, affecting the service life of the bearing. If the rolling member is a bearing and a roller, the direct contact between the bearing and the slideway can be effectively avoided, reducing the wear of the bearing, thereby increasing the service life of the bearing and reducing the maintenance cost.

[0024] Further, the slideway further includes a bent portion, and the upper end of the bent portion is fixedly connected to the free end of the installation portion.

[0025] The beneficial effects of this solution are as follows: When the side door panel of the carriage is in the open state, the hanging unit slides on the sliding part. The sliding part needs to bear the pressure of the side door panel of the carriage. The bending part is fixed on the installation part, and the pressure borne by the sliding part can be partially dispersed to the bending part, which is beneficial to improving the strength of the sliding part.

[0026] Furthermore, the sliding part is L-shaped. The sliding part includes a horizontal part and a vertical part connected in sequence, and the free end of the horizontal part is bent upward.

[0027] The beneficial effects of this solution are as follows: The upward bending of the horizontal part makes it difficult for the rolling element to fall off from the horizontal part, enabling the rolling element to slide smoothly on the horizontal part, thereby improving the efficiency of opening or closing the side door panel of the carriage. Brief Description of the Drawings

[0028] Figure 1 is the overall structure diagram of the carriage;

[0029] Figure 2 is the state diagram when the left side door panel of the carriage is opened;

[0030] Figure 3 is the three-dimensional diagram of the inner surface of the left side door panel of the carriage;

[0031] Figure 4 is the three-dimensional diagram of the cooperation between the left side door panel of the carriage and the slideway and the slider;

[0032] Figure 5 is the three-dimensional diagram of the cooperation between the lifting unit and the locking unit of the left side door panel of the carriage;

[0033] Figure 6 is Figure 5 the partial enlarged view at A in

[0034] Figure 7 is the three-dimensional diagram of the locking unit;

[0035] Figure 8 is the three-dimensional diagram of the slideway;

[0036] Figure 9 is the structural schematic diagram of the left side door panel of the carriage and the hanging unit;

[0037] Figure 10 is Figure 9 the partial enlarged view at B in

[0038] Figure 11 is the three-dimensional diagram of the slider;

[0039] Figure 12 is Figure 4 the side view of the open state of the left side door panel of the carriage, with the hanging unit cooperating with the slider and the slideway. Detailed Implementation Modes

[0040] The following is further described in detail through specific implementation methods:

[0041] The reference numerals in the drawings of the specification include: body beam 1, right side door panel 2, left side door panel 3, groove 4, concave sheet metal 5, fixing strip 6, strip hole 7, handle 8, fixing seat 9, positioning ring 10, first locking block 11, first rectangular through hole 12, slide 13, mounting portion 14, bending portion 15, sliding portion 16, second rectangular through hole 17, first shaft 18, lifting rod 19, fixing plate 20, support column 21, support seat 22, force hole 23, positioning plate 24 , a limit plate 25, a second shaft 26, a limit column 27, a limit seat 28, a bolt 29, a nut 30, a rotating handle 31, an L-shaped rod 32, a vertical rod 33, a second locking block 34, a slider 35, a T-slot 36, a support portion 37, a first inclined surface 38, a second inclined surface 39, a notch 40, a baffle 41, a Z-shaped connecting strip 42, a first connecting portion 43, a second connecting portion 44, a third connecting portion 45, a roller 46, a rotating shaft 47, a guide strip 48, a sliding column 49, and a bolt hole 50.

[0042] Example 1

[0043] like Figure 1 The overall structure of the carriage shown includes a slideway 13, a plurality of lifting units, a plurality of locking units and a plurality of hanging units.

[0044] The left side door panel 3 and the right side door panel 2 of this embodiment have the same opening and closing structure and share a slideway 13. Figure 2 As shown, when the right side door panel 2 is in a closed state, the left side door panel 3 can be opened staggered with the right side door panel 2. The following mainly describes the opening and closing structure of the left side door panel 3, and the opening and closing structure of the right side door panel 2 is not repeatedly described.

[0045] like Figure 3 As shown, a groove 4 is formed on the side of the lower end of the left compartment door panel 3, and three equally spaced concave sheet metals 5 are screwed into the groove 4. Four fixing strips 6 are welded to the inner surface of the left compartment door panel 3. The cross section of the fixing strip 6 is U-shaped, and a plurality of strip holes 7 are formed on the surface of the fixing strip 6 at equal intervals. Sealing strips are stuck in the side walls on both sides of the left compartment door panel 3. Figure 4 As shown, four handles 8 are fixed to the lower end of the outer surface of the left compartment side door panel 3 by screws.

[0046] The vehicle body beam 1 is located at the bottom of the left side door panel 3 and the right side door panel 2. Figure 5 and Figure 7As shown in the figure, two fixing seats 9 are welded on both the front and rear sides of the vehicle body girder 1. Five concentric positioning rings 10 are welded on both the front and rear sides of the vehicle body girder 1. The positioning rings 10 are located between the two fixing seats 9. Three equally spaced first locking blocks 11 are welded to the bottom of the vehicle body girder 1. A locking hole is provided on each first locking block 11. Three equally spaced first rectangular through holes 12 are provided on the vehicle body girder 1.

[0047] As Figure 5 and Figure 6 shown in the figure, the jacking unit includes a first shaft 18 and three jacking rods 19. The first shaft 18 is sleeved in the five concentric positioning rings 10 on the front side of the vehicle body girder 1. The first shaft 18 is rotatably connected to the fixing seat 9. A support seat 22 is welded to the front side of the first shaft 18. A force application hole 23 is provided on the support seat 22. The force application hole 23 is square-shaped. Through holes are provided on the opposite inner side surfaces of the force application hole 23 for clamping the protrusions on the force application rod, so that the force application rod is fixed more stably. Each jacking rod 19 includes a fixing plate 20 and a support column 21. The spacing between adjacent jacking rods 19 is equal. The fixing plate 20 is welded above the first shaft 18. The support column 21 is horizontally welded to the upper end of the fixing plate 20. Three equally spaced positioning plates 24 are welded to the rear side surface of the first shaft 18. As Figure 7 shown in the figure, the free end of the positioning plate 24 penetrates through the first rectangular through hole 12 on the vehicle body girder 1 and is located on the rear side of the vehicle body girder 1. A limiting plate 25 is welded to the upper surface of each positioning plate 24.

[0048] As Figure 7 shown in the figure, the locking unit includes a second shaft 26 and three rotating handles 31 (only one is shown in the figure). The second shaft 26 is sleeved in the five concentric positioning rings 10 on the rear side of the vehicle body girder 1 (only three are shown in the figure). The second shaft 26 is rotatably connected to the fixing seat 9. Three limiting columns 27 (only one is shown in the figure) are fixed on the second shaft 26. The spacing between adjacent limiting columns 27 is equal. By rotating the second shaft 26, the limiting column 27 can abut against the positioning plate 24. Each limiting column 27 includes a limiting seat 28, a bolt 29 and a nut 30. The limiting seat 28 is welded to the second shaft 26 above the positioning plate 24. A nut 30 is welded to the lower surface of the limiting seat 28. The bolt 29 is sequentially threadedly connected to the nut 30 and the limiting seat 28. Each rotating handle 31 includes an L-shaped rod 32 and a vertical rod 33. The spacing between adjacent rotating handles 31 is equal. The L-shaped rod 32 includes a horizontal part and a vertical part. One end of the vertical rod 33 is welded to the lower end of the second shaft 26, and the other end of the vertical rod 33 is welded to the upper end of the vertical part of the L-shaped rod 32. The included angle between the vertical part of the L-shaped rod 32 and the vertical rod 33 is an obtuse angle. As Figure 6 shown in the figure, a second locking block 34 is welded to the front side of the vertical part of the L-shaped rod 32. A locking hole is provided on the second locking block 34.

[0049] As Figure 1As shown, the slideway 13 is located at the upper ends of the left side door panel 3 and the right side door panel 2 of the carriage, as Figure 8 As shown, the slideway 13 includes a sliding part 16, a mounting part 14 and a bending part 15 which are connected in sequence. The sliding part 16 is L-shaped and includes a horizontal part and a vertical part which are connected in sequence. The free end of the horizontal part is bent upward, and six second rectangular through holes 17 are formed in the vertical part. The mounting part 14 is in a "one" shape, and the bending part 15 is L-shaped. The bottom of the bending part 15 is an inclined surface slanting leftward and downward.

[0050] As Figure 9 shown, the number of hanging units is three. Each hanging unit includes a slider 35 and a hanging part, and the distance between adjacent hanging units is equal.

[0051] As Figure 11 shown, an inclined T-shaped groove 36 is formed in the bottom of the slider 35. The T-shaped groove 36 includes two supporting parts 37. The front end of the inner side surface of each supporting part 37 is a first inclined surface 38 slanting outward. The two first inclined surfaces 38 form an outward expanding opening in the shape of an "eight". The front side of each supporting part 37 is a second inclined surface 39 slanting rightward and downward. Through notches 40 are formed in the front ends of both side surfaces of the slider 35. A baffle 41 is integrally formed on the leftmost slider 35 in the slideway 13 at the left notch 40, and a baffle 41 is integrally formed on the rightmost slider 35 in the slideway 13 at the right notch 40. The slider 35 is located inside the bending part 15, as Figure 10 shown, four bolt holes 50 are formed in the upper part of the slider 35. The top of the slider 35 is bolted to the mounting part 14, as Figure 12 shown, both ends of the T-shaped groove 36 are located above the sliding part 16 and the bending part 15 respectively, and the notches 40 on both side surfaces of the slider 35 are located on the left side of the slideway 13.

[0052] As Figure 9 and Figure 10 shown, each hanging part includes a Z-shaped connecting bar 42, a guiding bar 48, a sliding column 49 and a rolling member. The Z-shaped connecting bar 42 includes a first connecting part 43, a second connecting part 44 and a third connecting part 45 which are connected in sequence. The first connecting part 43 is fixedly connected to the upper end of the left side door panel 3 of the carriage by screws; the rolling member includes a bearing (not shown in the figure) and a roller 46. A rotating shaft 47 is welded to each end of the third connecting part 45. The bearing is in interference fit with the rotating shaft 47, and the roller 46 on the bearing is in interference fit with the bearing; one end of the guiding bar 48 is welded to the third connecting part 45, and the sliding column 49 is transversely welded to the other end of the guiding bar 48. The sliding column 49 is higher than the upper surface of the third connecting part 45. When the sliding column 49 slides to the notch 40 of the T-shaped groove 36, the roller 46 slides onto the sliding part 16.

[0053] The specific implementation process is as follows:

[0054] Opening process of left compartment side door panel 3:

[0055] When the left compartment side door panel 3 is in the closed state, the lifting rod 19 is supported in the concave sheet metal 5 at the bottom of the left compartment side door panel 3, the first locking block 11 and the second locking block 34 are in the locked state, the slide column 49 is located inside the T-slot 36, and the rolling element is separated from the sliding portion 16. When the left compartment side door panel 3 needs to be opened, the lock that locks the first locking block 11 and the second locking block 34 is opened, and the rotating handle 31 is turned backward. The rotation of the rotating handle 31 drives the second shaft 26 to rotate counterclockwise, and the rotation of the second shaft 26 drives The dynamic limit column 27 rotates synchronously, so that the limit column 27 leaves the surface of the positioning plate 24, and the constraint of the limit column 27 on the positioning plate 24 is released; the force rod is clamped with the force hole 23, and the force rod is rotated downward. The rotation of the force rod drives the first shaft 18 to rotate counterclockwise, and the rotation of the first shaft 18 drives the lifting rod 19 and the positioning plate 24 to rotate synchronously. The rotation of the lifting rod 19 drives the left side door panel 3 to tilt outward and move downward, so that the lifting rod 19 slides out from the front end of the concave sheet metal 5 at the bottom of the left side door panel 3. Since the first connecting portion 43 is screwed to the left compartment side door panel 3, the left compartment side door panel 3 moves downward, driving the slide column 49 and the roller 46 on the guide bar 48 to move synchronously, the slide column 49 slides out from the inside of the T-slot 36, the slide column 49 slides to the notch 40 of the T-slot 36, and the roller 46 slides onto the sliding portion 16. At this time, the left compartment side door panel 3 is hung on the sliding portion 16 of the slide rail 13, and the right compartment side door panel 2 is in a closed state. The left compartment side door panel 3 is pushed and pulled to the right, and the left compartment side door panel 3 is opened staggered with the right compartment side door panel 2.

[0056] Closing process of left compartment side door panel 3:

[0057] At this time, the left side door panel 3 of the carriage is in an open state. Push and pull the left side door panel 3 of the carriage to the left, so that the sliding column 49 is aligned with the corresponding T-shaped groove 36. Connect the force application rod to the force application hole 23, and rotate the force application rod upward. The rotation of the force application rod drives the first shaft 18 to rotate clockwise synchronously. The rotation of the first shaft 18 drives the jacking rod 19 and the positioning plate 24 to rotate synchronously, so that the jacking rod 19 slides into the interior of the concave sheet metal 5 from the front end of the left side door panel 3 of the carriage. Rotate the rotating handle 31 forward. The rotation of the rotating handle 31 drives the second locking block 34 and the limit post 27 to rotate clockwise synchronously, so that the limit post 27 abuts against the surface of the positioning plate 24. Continue to rotate the rotating handle 31 forward, so that the locking hole on the second locking block 34 is aligned with the locking hole on the first locking block 11. Since the limit post 27 abuts against the surface of the positioning plate 24, the positioning plate 24 rotates clockwise. The rotation of the positioning plate 24 drives the first shaft 18 and the jacking rod 19 to rotate synchronously. The rotation of the jacking rod 19 drives the left side door panel 3 of the carriage to move upward, so that the roller 46 disengages from the sliding part 16, drives the sliding column 49 on the guide bar 48 to move into the interior of the T-shaped groove 36, and the left side door panel 3 of the carriage can be closed. Pass the lock through the locking hole on the second locking block 34 and the locking hole on the first locking block 11 to lock the left side door panel 3 of the carriage.

[0058] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. Opening and closing structure of the side door panel of the carriage, characterized in that: It includes a jacking unit, a locking unit and several hanging units; several first locking blocks are fixed to the bottom of the vehicle body girder, and a slideway is fixed to the upper end of the side door panel of the carriage. The slideway includes a mounting part and a sliding part connected in sequence, and the slideway also includes a bending part. The upper end of the bending part is fixedly connected to the free end of the mounting part; a groove is formed at the bottom of the side door panel of the carriage; the jacking unit includes a first shaft, the first shaft is rotatably arranged on the front side of the vehicle body girder, several jacking rods are fixed to the first shaft, and several positioning plates are also fixed to the first shaft. The free end of the positioning plate is located at the rear side of the vehicle body girder; the locking unit includes a second shaft, the second shaft is rotatably arranged on the rear side of the vehicle body girder, several rotating handles are fixed to the second shaft, and a second locking block for cooperating with the first locking block is fixed to each rotating handle. A limiting column is fixed to the second shaft. By rotating the second shaft, the limiting column can abut against the positioning plate. Each limiting column includes a limiting seat, a bolt and a nut. The limiting seat is fixed to the second shaft, the nut is fixed to the lower surface of the limiting seat, and the bolt is threadedly connected to the nut and the limiting seat in sequence; each hanging unit includes a slider and a hanging part; a T-shaped groove is formed at the bottom of the slider, and the top of the slider is fixedly connected to the mounting part. Each T-shaped groove includes two supporting parts, and the front end of the inner side surface of each supporting part is a first inclined surface. The two first inclined surfaces form an outward expanding opening in the shape of an "eight"; the hanging part includes a Z-shaped connecting bar, a rolling member and a sliding column for sliding in the T-shaped groove. One end of the Z-shaped connecting bar is fixed to the upper end of the side door panel of the carriage, the free end of the Z-shaped connecting bar is fixedly connected with a rotating shaft, the rolling member is rotatably connected with the rotating shaft, the free end of the Z-shaped connecting bar is fixedly connected with a guiding bar, the sliding column is horizontally fixed to the other end of the guiding bar. After the sliding column slides out of the T-shaped groove, the rolling member slides into the sliding part. The sliding part is L-shaped and includes a horizontal part and a vertical part connected in sequence. The free end of the horizontal part is bent upward.

2. The opening and closing structure of the side door panel of the carriage according to claim 1, characterized in that: The front side of each supporting part is a second inclined surface.

3. The opening and closing structure of the side door panel of the carriage according to claim 1, wherein: The jacking rod includes a fixing plate and a supporting column. The fixing plate is fixedly connected to the first shaft, and the supporting column is horizontally fixed to the upper end of the fixing plate.

4. The opening and closing structure of the side door panel of the carriage according to claim 1, wherein: Several concave sheet metals are fixed in the groove at the bottom of the side door panel of the carriage.

5. The opening and closing structure of the side door panel of the carriage according to claim 1, characterized in that: A limiting plate is fixed to each positioning plate.

6. The opening and closing structure of the side door panel of the carriage according to claim 1, wherein: The rolling member includes a bearing and a roller. The bearing is in interference fit with the rotating shaft, and the roller on the bearing is in interference fit with the bearing.

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