Tail plate mounting mechanism without welding

Abstract

The utility model relates to the field of tail plate installation, and provides a welding-free tail plate installation mechanism which comprises a machine frame assembly, a novel hanging plate assembly, a limiting check block screw joint support, a limiting switch screw joint support, a gap bridge screw joint assembly, an electric cabinet screw joint support and a power unit fixing support. The rack assembly comprises a first connecting lifting lug, a second connecting lifting lug and a square tube, and the first connecting lifting lug and the second connecting lifting lug are welded to the two ends of the square tube; the first connecting lifting lug is connected with a lifting arm on the tail plate, and the second connecting lifting lug is connected with a lifting cylinder on the tail plate; according to the utility model, the connection of the frame assembly, the novel hanger plate assembly, the limit stop screw joint bracket, the limit switch screw joint bracket, the gap bridge screw joint assembly, the electric cabinet screw joint bracket and the power unit fixing bracket on the vehicle beam or the large plate and the connection relationship among the structures are changed into screw joint, so that the problems caused by welding in the prior art are avoided; and the mounting precision and the structural stability are also improved while the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of tailboard installation, in particular to a tailboard installation mechanism without welding. Background Art

[0002] With the development of society, the ownership of automobiles has increased year by year, and at the same time, the labor cost has increased accordingly. The application of automobile tailboards has become more and more common. At present, the vast majority of automobile tailboard racks on the market are welded on site. Some connectors need to be welded on site, and components such as rack suspension plates need to be welded to the vehicle or carriage beam. The on-site welding has the following disadvantages:

[0003] (1) Nowadays, most tailboard installations require welding, which requires professional welders, takes a long time, and has many welding parts.

[0004] (2) There are many welding positions between the tailboard and the rack. There are positions where welding is inconvenient and it is necessary to drill under the vehicle to weld, which poses a safety hazard.

[0005] (3) The welding process is complex. After the suspension plate is welded to the vehicle beam, it cannot be adjusted twice. Only cutting and modification can be carried out. After cutting and modification, the weld seam is not beautiful and is prone to pose a safety hazard to later use.

[0006] (4) Welding will cause secondary damage to the strength of the vehicle body and pose a safety hazard to the vehicle. Content of the Utility Model

[0007] The utility model provides a tailboard installation mechanism without welding. By changing the connection between the rack assembly, the new suspension plate assembly, the limit block screwing bracket, the cross-bridge screwing assembly, the electric control box screwing bracket, the power unit fixing bracket and the vehicle beam or the large plate and the connection relationship between the structures to screwing, a series of problems caused by welding in the prior art are avoided. While improving the installation efficiency, the installation accuracy is also improved, and the structural stability is improved.

[0008] The technical solution of the utility model is realized as follows:

[0009] A tailboard installation mechanism without welding includes: a rack assembly, a new suspension plate assembly, a limit block screwing bracket, a cross-bridge screwing assembly, an electric control box screwing bracket, a power unit fixing bracket and a limit switch screwing bracket;

[0010] The rack assembly includes a first connection lug, a second connection lug and a square tube. The first connection lug and the second connection lug are welded to both ends of the square tube;

[0011] The first connection lug is connected to the lifting arm on the tailboard, and the second connection lug is connected to the lifting cylinder on the large plate;

[0012] The novel hanging plate assembly, the limit stop screw connection bracket, the cross-bridge screw connection assembly, the electric control box screw connection bracket and the power unit fixing bracket are all screwed to the square tube.

[0013] Furthermore, the novel hanging plate assembly includes a hanging plate, a cover plate, a first threaded sleeve, a second threaded sleeve, a first bolt and a second bolt;

[0014] The first threaded sleeve and the second threaded sleeve are installed on the hanging plate in an up-and-down opposite manner;

[0015] The cover plate is provided with a first positioning hole and a second positioning hole in an up-and-down opposite manner;

[0016] The first positioning hole is aligned with the first threaded sleeve;

[0017] The second positioning hole is aligned with the second threaded sleeve;

[0018] The first bolt passes through the first positioning hole and is connected to the first threaded sleeve;

[0019] The second bolt passes through the second positioning hole and is connected to the second threaded sleeve;

[0020] A frame installation position is formed among the hanging plate, the first threaded sleeve, the first bolt, the cover plate, the second bolt and the second threaded sleeve;

[0021] The novel hanging plate assembly is installed on the square tube through the frame installation position.

[0022] Furthermore, the limit stop screw connection bracket is screwed to the large plate;

[0023] A limit stop is screwed to the limit stop screw connection bracket.

[0024] Furthermore, the limit switch screw connection bracket includes a connecting plate, a support body and a mounting plate. The connecting plate and the mounting plate are respectively arranged at two ends of the support body. A first bracket screw connection hole is arranged on the connecting plate, and the connecting plate is installed on the side surface of the car beam through the first bracket screw connection hole.

[0025] Furthermore, the limit switch screw connection bracket includes a first support plate, a second support plate, a third support plate and a fourth support plate;

[0026] The first support plate is installed at one end of the second support plate;

[0027] The third support plate is installed at the other end of the second support plate;

[0028] The fourth support plate is simultaneously installed on the first support plate, the second support plate and the third support plate;

[0029] A fifth screw hole is provided on the first support plate, and the first support plate is screwed to the vehicle beam through the fifth screw hole;

[0030] A sixth screw hole is provided on the third support plate.

[0031] Further, the bridge screw connection assembly includes a bent plate and a plurality of reinforcing ribs. The plurality of reinforcing ribs are welded to the inner bend of the bent plate at equal intervals. A hinge is installed between every three reinforcing ribs, and the hinge is also installed on the large plate through bolts.

[0032] Further, the bridge screw connection assembly includes a bent plate and a connecting plate;

[0033] One end of the connecting plate is installed on the bent plate;

[0034] The other end of the connecting plate is provided with a first screw hole;

[0035] A second screw hole is provided on the lifting arm;

[0036] The first screw hole and the second screw hole are connected by a connecting bolt;

[0037] A plurality of connecting plates are provided.

[0038] Further, the electric control box screw connection bracket is an electric control box screw connection bracket made by bending the two ends of a steel plate in opposite directions by 90°. A second bracket screw hole is provided on the bottom bending part of the electric control box screw connection bracket, and the electric control box screw connection bracket is threadedly connected to the square tube through the second bracket screw hole; an electric control box installation position and a plurality of electric control box screw holes are provided on the top bending part of the electric control box screw connection bracket, and the plurality of electric control box screw holes are evenly distributed on the outer peripheral side of the electric control box installation position.

[0039] Further, the electric control box screw connection bracket includes a first L-shaped connecting plate, a second L-shaped connecting plate, a third L-shaped connecting plate, a fourth L-shaped connecting plate and a fifth L-shaped connecting plate;

[0040] The first L-shaped connecting plate and the second L-shaped connecting plate are arranged opposite to each other with a gap in the middle;

[0041] The third L-shaped connecting plate is connected to the first L-shaped connecting plate, and the third L-shaped connecting plate is perpendicular to the first L-shaped connecting plate;

[0042] The fourth L-shaped connecting plate is connected to the second L-shaped connecting plate, and the fourth L-shaped connecting plate is perpendicular to the second L-shaped connecting plate;

[0043] The fifth L-shaped connecting plate is connected to both the first L-shaped connecting plate and the second L-shaped connecting plate at the same time;

[0044] The fifth L-shaped connecting plate is provided with a third screw hole, and the fifth L-shaped connecting plate is installed on the square pipe through the third screw hole;

[0045] Both the third L-shaped connecting plate and the fourth L-shaped connecting plate are provided with fourth screw holes for installing the electric control box.

[0046] Furthermore, the power unit fixing bracket is a power unit fixing bracket made of channel steel. The bottom of the power unit fixing bracket is provided with a third bracket screw hole. The power unit fixing bracket is threadedly connected to the square pipe through the third bracket screw hole. Power unit screw holes are also provided on both sides of the power unit bracket.

[0047] In the present utility model, the connection between the frame assembly, the new hanging plate assembly, the limit stop screw bracket, the cross-bridge screw assembly, the electric control box screw bracket, the power unit fixing bracket and the limit switch screw bracket to the vehicle beam or the large plate, as well as the connection relationship between the structures, are all changed to screw connections, avoiding a series of problems caused by welding in the prior art. While improving the installation efficiency, it also improves the installation accuracy and the stability of the structure. Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0049] Figure 1 It is a schematic diagram of the overall structure of the first perspective of a tail plate installation mechanism without welding in the first specific embodiment of the present utility model;

[0050] Figure 2 It is Figure 1 A schematic diagram of the overall structure of the second perspective of a tail plate installation mechanism without welding shown;

[0051] Figure 3 It is Figure 1 、 Figure 2 A structural decomposition diagram of the new hanging plate assembly of a tail plate installation mechanism without welding shown;

[0052] Figure 4 It is Figure 3 A schematic diagram of the cover plate of the new hanging plate assembly shown;

[0053] Figure 5 It is Figure 1 、Figure 2 Schematic diagram of the structure of the limit stop screw connection bracket of a tailboard installation mechanism without welding

[0054] Figure 6 For Figure 1 、 Figure 2 Schematic diagram of the structure of the cross-bridge screw connection assembly of a tailboard installation mechanism without welding

[0055] Figure 7 For Figure 6 Enlarged view of the structure at location A of the cross-bridge screw connection assembly

[0056] Figure 8 For Figure 1 、 Figure 2 Schematic diagram of the structure of the electric control box screw connection bracket of a tailboard installation mechanism without welding

[0057] Figure 9 For Figure 1 、 Figure 2 Schematic diagram of the structure of the power unit fixing bracket of a tailboard installation mechanism without welding

[0058] Figure 10 Schematic diagram of the connection structure between the cross-bridge screw connection assembly and the lifting arm of a tailboard installation mechanism without welding in a specific embodiment of the present invention

[0059] Figure 11 For Figure 10 Schematic diagram of the structure of the cross-bridge screw connection assembly in Specific Embodiment 2

[0060] Figure 12 Schematic diagram of the position structure of the limit switch screw connection bracket of a tailboard installation mechanism without welding in Specific Embodiment 3 of the present invention

[0061] Figure 13 For Figure 12 Enlarged view of the structure of the limit switch screw connection bracket

[0062] Figure 14 Schematic diagram of the position structure of the electric control box screw connection bracket of a tailboard installation mechanism without welding in Specific Embodiment 4 of the present invention

[0063] Figure 15 For Figure 14 Enlarged view of the structure of the electric control box screw connection bracket

[0064] Description of the reference numerals: frame assembly 1; first connecting lug 11; second connecting lug 12; square pipe 13; new lifting plate assembly 2; lifting plate 21; cover plate 22; first positioning hole 221; second positioning hole 222; first threaded sleeve 23; second threaded sleeve 24; first bolt 25; second bolt 26; limit stop screwing bracket 3; limit block 31; limit switch bracket 31; limit block mounting bracket 32; limit block 33; cross-bridge screwing assembly 4; bent plate 41; reinforcing rib 42; electric control box screwing bracket 5; second bracket screwing hole thread 51; electric control box mounting position 52; electric control box screwing hole 53; power unit fixing bracket 6; third bracket screwing hole 61; third bracket screwing hole 61; power unit screwing hole 62; large plate 7; lifting arm 71; second screwing hole 711; lifting cylinder 72; vehicle beam 8; limit switch screwing bracket 9; connecting plate 91; first bracket screwing hole 911; support body 92; mounting plate 93; cross-bridge screwing assembly 4'; bent plate 41'; connecting plate 42'; first screwing hole 421'; limit switch screwing bracket 9'; first support plate 91'; fifth screwing hole 911'; second support plate 92'; third support plate 93'; sixth screwing hole 931'; fourth support plate 94'; electric control box screwing bracket 5' includes first L-shaped connecting plate 51', second L-shaped connecting plate 52', third L-shaped connecting plate 53', fourth L-shaped connecting plate 54' and fifth L-shaped connecting plate 55'; fourth screwing hole 56'. Detailed implementation manners

[0065] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0066] In the first specific embodiment of the present invention, see Figures 1-9 , a tail plate installation mechanism without welding, comprising: a frame assembly 1, a new lifting plate assembly 2, a limit stop screwing bracket 3, a cross-bridge screwing assembly 4, an electric control box screwing bracket 5, a power unit fixing bracket 6 and a limit switch screwing bracket 9;

[0067] The frame assembly 1 includes a first connecting lug 11, a second connecting lug 12 and a square pipe 13, and the first connecting lug and the second connecting lug are welded to both ends of the square pipe;

[0068] The first connecting lug 11 is connected to the lifting arm 71 on the large plate 7, and the second connecting lug 12 is connected to the lifting cylinder 72 on the large plate 7;

[0069] The new suspension plate assembly 2, the limit stop screw connection bracket 3, the cross-bridge screw connection assembly 4, the electric control box screw connection bracket 5 and the power unit fixing bracket 6 are all screwed to the square tube 13;

[0070] Among them, the new suspension plate assembly 2 is used to realize the connection between the vehicle beam 8 and the square tube 13;

[0071] The limit stop screw connection bracket 3 is used to install the limit switch;

[0072] The cross-bridge screw connection assembly 4 is used to fill the gap between the tailboard and the carriage, prevent the goods from getting stuck when entering the carriage from the tailboard due to the gap between the tailboard and the carriage, and eliminate the danger brought by the stuck goods;

[0073] The electric control box screw connection bracket 5 is used to install the electric control box;

[0074] The power unit fixing bracket 6 is used to install the hydraulic power unit that provides power for the hydraulic cylinder.

[0075] In the first specific embodiment of the present invention, see Figures 1-9 , the new suspension plate 2 assembly includes a suspension plate 21, a cover plate 22, a first threaded sleeve 23, a second threaded sleeve 24, a first bolt 25 and a second bolt 26;

[0076] The first threaded sleeve 23 and the second threaded sleeve 24 are installed on the suspension plate 21 in an up-and-down opposite manner;

[0077] The cover plate 22 is provided with a first positioning hole 221 and a second positioning hole 222 in an up-and-down opposite manner;

[0078] The first positioning hole 221 is aligned with the first threaded sleeve 23;

[0079] The second positioning hole 222 is aligned with the second threaded sleeve 24;

[0080] The first bolt 25 passes through the first positioning hole 221 and is connected to the first threaded sleeve 23;

[0081] The second bolt 26 passes through the second positioning hole 222 and is connected to the second threaded sleeve 24;

[0082] A frame installation position is formed among the suspension plate 21, the first threaded sleeve 23, the first bolt 25, the cover plate 22, the second bolt 26 and the second threaded sleeve 24;

[0083] The new suspension plate assembly 2 is installed on the square tube 13 through the frame installation position;

[0084] Through the setting of the above structure, the connection method between the suspension plate and the frame is changed, that is, from the original welding to the idle screwing.

[0085] In the first specific embodiment of the present utility model, see Figures 1-9 , specifically see Figure 2 , the limit stop screw connection bracket 3 is screwed to the large plate 7;

[0086] A limit block 31 is screwed onto the limit stop screw connection bracket 3.

[0087] In the first specific embodiment of the present utility model, see Figures 1-9 , the limit switch screw connection bracket 9 includes a connecting plate 91, a support body 92 and a mounting plate 93. The connecting plate 91 and the mounting plate 93 are respectively arranged at both ends of the support body 92. A first bracket screw connection hole 911 is arranged on the connecting plate 91, and the connecting plate 91 is mounted on the side of the car beam 8 through the first bracket screw connection hole 911;

[0088] The mounting plate 93 is used for mounting a limit switch.

[0089] In the first specific embodiment of the present utility model, see Figures 1-9 , the cross-bridge screw connection assembly 4 includes a bent plate 41 and a plurality of reinforcing ribs 42. The plurality of reinforcing ribs 42 are welded at equal intervals inside the inner bend of the bent plate 41. A hinge 43 is installed between every three reinforcing ribs 42, and the hinge 43 is simultaneously installed on the large plate 7 through bolts.

[0090] In the first specific embodiment of the present utility model, see Figures 1-9 , the electric control box screw connection bracket 5 is an electric control box screw connection bracket made by bending both ends of a steel plate in opposite directions by 90°. A second bracket screw connection hole 51 is arranged on the bottom bent part of the electric control box screw connection bracket 5, and the electric control box screw connection bracket is threadedly connected to the square tube 13 through the second bracket screw connection hole 51; An electric control box mounting position 52 and a plurality of electric control box screw connection holes 53 are arranged on the top bent part of the electric control box screw connection bracket 5, and the plurality of electric control box screw connection holes 53 are evenly distributed on the outer peripheral side of the electric control box mounting position 52;

[0091] The connection between the electric control box screw connection bracket and the frame and the connection between the electric control box and the electric control box screw connection bracket are both screwed connections.

[0092] In the first specific embodiment of the present utility model, see Figures 1-9 , the power unit fixed bracket 6 is a power unit fixed bracket made of channel steel. A third bracket screw connection hole 61 is arranged at the bottom of the power unit fixed bracket 6, and the power unit fixed bracket is threadedly connected to the square tube 13 through the third bracket screw connection hole 61. Power unit screw connection holes 62 are also arranged on both sides of the power unit bracket 6.

[0093] In the second specific embodiment of the present utility model, the bridge screw connection assembly 4' includes a bent plate 41' and a connecting plate 42';

[0094] One end of the connecting plate 42' is mounted on the bent plate 41';

[0095] The other end of the connecting plate 42' is provided with a first screw connection hole 421';

[0096] A second screw connection hole 711 is provided on the lifting arm 71;

[0097] The first screw connection hole 421' and the second screw connection hole 711 are connected by a connecting bolt;

[0098] A plurality of the connecting plates 42' are provided.

[0099] In the third specific embodiment of the present utility model, see Figure 12 and Figure 13 , the limit switch screw connection bracket 9' includes a first support plate 91', a second support plate 92', a third support plate 93' and a fourth support plate 94';

[0100] The first support plate 91' is mounted on one end of the second support plate 92';

[0101] The third support plate 93' is mounted on the other end of the second support plate 92';

[0102] The fourth support plate 94' is simultaneously mounted on the first support plate 91', the second support plate 92' and the third support plate 93';

[0103] A fifth screw connection hole 911' is provided on the first support plate 91', and the first support plate 91' is screwed to the vehicle beam 8 through the fifth screw connection hole 911';

[0104] A sixth screw connection hole 931' is provided on the third support plate 93' for mounting a limit switch.

[0105] In the fourth specific embodiment of the present utility model, see Figure 14 and Figure 15 , the electric control box screw connection bracket 5' includes a first L-shaped connecting plate 51', a second L-shaped connecting plate 52', a third L-shaped connecting plate 53', a fourth L-shaped connecting plate 54' and a fifth L-shaped connecting plate 55';

[0106] The first L-shaped connecting plate 51' and the second L-shaped connecting plate 52' are arranged oppositely with a gap left in the middle;

[0107] The third L-shaped connecting plate 53' is connected to the first L-shaped connecting plate 51', and the third L-shaped connecting plate 53' is perpendicular to the first L-shaped connecting plate 51';

[0108] The fourth L-shaped connecting plate 54' is connected to the second L-shaped connecting plate 52', and the fourth L-shaped connecting plate 54' is perpendicular to the second L-shaped connecting plate 52';

[0109] The fifth L-shaped connecting plate 55' is connected to both the first L-shaped connecting plate 51' and the second L-shaped connecting plate 52';

[0110] A third screw hole (not shown in the figure) is provided on the fifth L-shaped connecting plate 55', and the fifth L-shaped connecting plate 55' is mounted on the square pipe 13 through the third screw hole;

[0111] Both the third L-shaped connecting plate 53' and the fourth L-shaped connecting plate 54' are provided with fourth screw holes 56' for installing the electric control box.

[0112] In this application, the connections between the frame assembly, the new hanging plate assembly, the limit stop screw bracket, the cross-bridge screw assembly, the electric control box screw bracket, and the power unit fixing bracket and the carriage, as well as the connections between the two-by-two structures, are all screw connections. The screw connection structure is simple, convenient for disassembly and installation, and effectively avoids a series of unnecessary troubles brought by welding. While effectively improving the matching accuracy between the structures, it also improves the connection efficiency.

[0113] In a specific embodiment of the present utility model, see Figures 1-9 , this application also

[0114] This application also has the following advantages:

[0115] 1. Solved the welding problem during the installation of the tailboard and the vehicle body. The disassembly and installation are convenient, avoiding danger to the vehicle;

[0116] 2. Compared with the on-site welding scheme, there is no need for welding, no need to hire professional welders, and only bolt connection is required. The operation is simple and the work is efficient;

[0117] 3. During the screw connection process, the positions of the components can be adjusted secondly. When there is a deviation in the screw connection, it can be adjusted at any time without cutting the weld seam, effectively protecting the equipment;

[0118] 4. It is more convenient to replace parts. When replacing, only the bolts need to be disassembled for replacement, without cutting;

[0119] 5. Avoided the problem of the frame tilting caused by the relative displacement during the later welding of the hanging plate and the frame and the inaccurate welding dimension accuracy.

[0120] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tail plate mounting mechanism without welding, characterized in that: It includes a frame assembly, a new type of hanging plate assembly, a limit stopper screw-connecting bracket, a bridge screw-connecting assembly, an electric control box screw-connecting bracket, a power unit fixing bracket and a limit switch screw-connecting bracket; The frame assembly comprises a first connecting lug, a second connecting lug and a square tube, and both ends of the square tube are welded with the first connecting lug and the second connecting lug; The first connecting lug is connected to the lifting arm on the large plate, and the second connecting lug is connected to the lifting cylinder on the large plate; The novel hanging plate assembly, the limit stopper screw-connecting bracket, the bridge screw-connecting assembly, the electric control box screw-connecting bracket and the power unit fixing bracket are all screw-connected on the square tube.

2. A tail plate mounting mechanism without welding as claimed in claim 1, characterized in that: The novel hanging plate assembly comprises a hanging plate, a cover plate, a first threaded sleeve, a second threaded sleeve, a first bolt and a second bolt; The first threaded sleeve and the second threaded sleeve are installed on the hanging plate in an upward and downward manner opposite to each other; The cover plate is provided with a first positioning hole and a second positioning hole opposite to each other in the upper and lower parts; The first positioning hole is aligned with the first threaded sleeve; The second positioning hole is aligned with the second threaded sleeve; The first bolt passes through the first positioning hole and is connected to the first threaded sleeve; The second bolt passes through the second positioning hole and is connected to the second threaded sleeve; A rack installation position is formed between the hanging plate, the first threaded sleeve, the first bolt, the cover plate, the second bolt, and the second threaded sleeve; The novel hanging plate assembly is installed on the square passage through the rack mounting position.

3. A tail plate mounting mechanism without welding as claimed in claim 2, characterized in that: The limit stopper screw-connected bracket is screwed to the large plate; The limit stopper is screwed on the bracket and the limit block is screwed on the bracket.

4. The tail plate installation mechanism without welding as claimed in claim 1, characterized in that: The limit switch screw-connected bracket includes a connecting plate, a support body and a mounting plate. The connecting plate and the mounting plate are respectively arranged at two ends of the support body. A first bracket screw-connected hole is arranged on the connecting plate. The connecting plate is installed on the side of the vehicle beam through the first bracket screw-connected hole.

5. The tail plate installation mechanism without welding as claimed in claim 1, characterized in that: The limit switch screw-connected bracket includes a first support plate, a second support plate, a third support plate and a fourth support plate; The first support plate is mounted on one end of the second support plate; The third support plate is mounted on the other end of the second support plate; The fourth support plate is installed on the first support plate, the second support plate and the third support plate at the same time; The first support plate is provided with a fifth screw hole, and the first support plate is screwed to the vehicle beam through the fifth screw hole; The third supporting plate is provided with a sixth screw hole.

6. A tail plate mounting mechanism without welding as claimed in claim 4, characterized in that: The bridge screw connection assembly includes a bent plate and a plurality of reinforcing ribs, wherein the plurality of reinforcing ribs are welded evenly spaced inside the inner bend of the bent plate, a hinge is installed between every three reinforcing ribs, and the hinge is simultaneously installed on the large plate by bolts.

7. A tail plate mounting mechanism without welding as claimed in claim 4, characterized in that: The bridge screw connection assembly includes a bent plate and a connecting plate; One end of the connecting plate is mounted on the bending plate; The other end of the connecting plate is provided with a first screw hole; The lifting arm is provided with a second screw hole; The first threaded hole and the second threaded hole are connected by a connecting bolt; A plurality of connecting plates are provided.

8. The tail plate installation mechanism without welding as claimed in claim 1, characterized in that: The electric control box screw-on bracket is made by bending both ends of a steel plate 90° in opposite directions respectively, a second bracket screw-on hole is arranged on the bottom bending portion of the electric control box screw-on bracket, and the electric control box screw-on bracket is threadedly connected to the square tube through the second bracket screw-on hole; an electric control box mounting position and a plurality of electric control box screw-on holes are arranged on the top bending portion of the electric control box screw-on bracket, and the plurality of electric control box screw-on holes are evenly distributed on the outer peripheral side of the electric control box mounting position.

9. The tailgate mounting mechanism without welding as claimed in claim 1, characterized in that: The electric control box screw-connecting bracket includes a first L-shaped connecting plate, a second L-shaped connecting plate, a third L-shaped connecting plate, a fourth L-shaped connecting plate and a fifth L-shaped connecting plate; The first L-shaped connecting plate and the second L-shaped connecting plate are arranged opposite to each other with a gap in between; The third L-shaped connecting plate is connected to the first L-shaped connecting plate, and the third L-shaped connecting plate is perpendicular to the first L-shaped connecting plate; The fourth L-shaped connecting plate is connected to the second L-shaped connecting plate, and the fourth L-shaped connecting plate is perpendicular to the second L-shaped connecting plate; The fifth L-shaped connecting plate is connected to the first L-shaped connecting plate and the second L-shaped connecting plate at the same time; The fifth L-shaped connecting plate is provided with a third screw hole, and the fifth L-shaped connecting plate is installed on the square tube through the third screw hole; The third L-shaped connecting plate and the fourth L-shaped connecting plate are both provided with fourth screw holes for installing the electric control box.

10. The tail plate installation mechanism without welding as claimed in claim 1, characterized in that: The power unit fixing bracket is a power unit fixing bracket made of channel steel, and a third bracket screw hole is arranged at the bottom of the power unit fixing bracket. The power unit fixing bracket is threadedly connected to the square tube through the third bracket screw hole, and power unit screw holes are also arranged on both sides of the power unit bracket.

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