Automatic case assembling equipment

Abstract

The invention belongs to the technical field of computer case assembling, and particularly relates to automatic case assembling equipment which comprises a conveying line used for conveying case frames. A first support is installed above the conveying line, a pair of supporting columns are arranged on the surface of the first support and located on the two sides of the conveying line, a storage box is arranged at the top ends of the supporting columns, and to-be-assembled case assemblies are stacked in the storage box; according to the automatic assembling equipment for the case, the feeding rod is arranged; during use, a sealing plate is fed to a box frame through a vacuum suction cup, and then a screw is fed to a designated position through cooperation of a feeding rod and a screw rod; then the fastening of the screw is completed through the fastening assembly; further, automatic assembly of the case is realized; and finally, the assembled case is conveyed to the discharging end of the conveying line for discharging operation. Automatic assembly of the case can be achieved by repeating the process, and auxiliary operation of workers is not needed. The labor cost is reduced; and the case assembling efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of computer case assembly, and specifically relates to an automatic case assembly device. Background Art

[0002] A computer mainframe is a terminal device for sending and receiving information in network technology, including the main body part except input and output devices such as CPU, memory, hard disk, etc., and is usually a control box for placing the motherboard and other main components; existing computer cases usually include two main parts, one is the main case frame, and the other is the sealing plate; when installing a computer, it is necessary to first remove the sealing plate part, then install devices such as memory into the case frame, and finally install the sealing plate on the case frame; and when manufacturing a computer case, it is necessary to assemble the sealing plate part to the case frame part.

[0003] When assembling and manufacturing existing cases, it is necessary to first manually attach the sealing plate part to the case frame, then place screws into the screw holes, and finally use an auxiliary tightening gun to tighten the screws; the whole process is difficult to achieve full automation, and workers are required to assist in feeding materials, placing screws, etc.; this increases labor costs and the assembly efficiency of the case is relatively low.

[0004] Therefore, the present invention provides an automatic case assembly device. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: An automatic case assembly device of the present invention includes a conveyor line for conveying a case frame; above the conveyor line, a first support is installed, and on the surface of the first support and on both sides of the conveyor line, a pair of support columns are provided, and at the top of the support columns, a storage box is provided, and inside the storage box, case components to be assembled are stacked; at the top of the first support, a first slide rail is installed, and in the track of the first slide rail, a first trolley is provided, on the surface of the first trolley, a connecting frame is provided, at the bottom end of the connecting frame, a first hydraulic cylinder is installed, and at the output end of the first hydraulic cylinder, a receiving plate is provided, and at the bottom end of the receiving plate, a vacuum suction cup is provided.

[0007] A second support is provided at the bottom end of the conveying line and on the side of the first support away from the feeding end of the conveying line. A cross bar is provided at the top end of the second support. A pair of feeding rods are provided at both ends of the cross bar. A feeding groove is formed at the top end of the feeding rod. A pair of grooves are formed in the inner walls on both sides of the feeding groove; the nut of the screw can be embedded in the groove; a pair of discharging holes are formed at the bottom end of the feeding groove; rectangular nuts are provided at both ends of the feeding rod. A screw rod is meshed and connected inside the rectangular nut. One end of the screw rod penetrates into the feeding groove, and the other end is provided with a servo motor. A pushing plate is provided at the position of one end of the screw rod inside the feeding groove; a connecting component is provided between the servo motor and the second support; the connecting component includes a fixing plate which is fixedly connected with the servo motor; a guide rod penetrating through the side surface of the second support is provided at the bottom end of the fixing plate; a third support is provided at the bottom end of the conveying line and on the side of the second support away from the first support. A fastening component is provided at the top end of the third support.

[0008] Preferably, a pair of blocking blocks are slidably connected inside the feeding groove and at the top of the pair of discharging holes. A buffer spring is provided on the side surface of the blocking block. One end of the buffer spring away from the blocking block is provided with a positioning block fixed inside the feeding groove; initially, the screw is located between the blocking block and the pushing plate.

[0009] Preferably, a receiving column is provided on the surface of the second support. A second guide rail is provided at the top end of the receiving column. A second trolley is arranged in the track of the second guide rail. A fixing column is provided at the top end of the second trolley. A fixing frame is provided at the top end of the fixing column. A pair of pushing devices are provided at the top end of the fixing frame. A limiting rod is provided at the output end of the pushing device. A limiting block is provided on the side of a pair of the limiting rods facing each other. The clamping surface of the limiting block is set as an arc surface adapted to the nut of the screw.

[0010] Preferably, the limiting block is made of rubber.

[0011] Preferably, the fastening component includes a second hydraulic cylinder installed at the top end of the third support. A linkage plate is provided at the output end of the second hydraulic cylinder. A plurality of output motors are provided at the top end of the linkage plate. A friction cylinder is provided at the output end of the output motor. A tightening head is inserted at the bottom end of the friction cylinder; through holes are formed in the side surface of the friction cylinder; friction blocks are arranged in the through holes. One side of the friction block located inside the through hole is attached to the side surface of the tightening head; a pressing component is provided on the side of the friction block located outside the through hole.

[0012] Preferably, the pressing assembly includes a cylinder, a piston is arranged inside the cylinder, and one end of the piston outside the cylinder is connected to a friction block; a charging pipe is communicated with the bottom end of the cylinder, one end of the charging pipe away from the cylinder is communicated with a charging box, the charging box is fixed at the bottom end of the linkage plate, and an air pump and a pressure relief valve are communicated with the charging box.

[0013] Preferably, the charging box is arranged in a ring shape; a sealing ring is rotatably arranged on the inner ring surface of the charging box, and the charging pipe penetrates through the sealing ring and is communicated with the charging box.

[0014] Preferably, a pair of limiting plates are arranged at the top end of the conveyor line, and the distance between the limiting plates is the conveying width of the chassis frame.

[0015] Preferably, a guiding plate is arranged on one side of the limiting plate at the feeding end of the conveyor line; the guiding plate is used for guiding and feeding the chassis frame.

[0016] Preferably, a third hydraulic cylinder is arranged on the side surface of the limiting plate, a linkage frame is arranged at the output end of the third hydraulic cylinder, and a baffle is arranged at the end of the linkage frame away from the third hydraulic cylinder; the baffle is used for blocking the chassis frame at the installation screw station.

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

[0018] 1. For an automatic chassis assembly device of the present invention, by setting a feeding rod; during use, first, the sealing plate is fed onto the box frame through a vacuum chuck, and then the screw is fed to a specified position through the cooperation of the feeding rod and the screw rod; then the screw is tightened through the fastening assembly; thus, the automatic assembly of the chassis is realized; finally, the assembled chassis is conveyed to the discharging end of the conveyor line for discharging operation; repeating the above process can realize the automatic assembly of the chassis, without the need for staff assistance; reducing labor costs and improving the chassis assembly efficiency.

[0019] 2. For an automatic chassis assembly device of the present invention, by setting a limiting rod; when the screw falls out of the blanking hole, the pusher starts to drive the limiting rods to approach each other, and the screw is clamped and fixed by a pair of limiting blocks, and the arc surface of the limiting block clamps the nut of the screw; then the second trolley and the second guide rail move synchronously with the box frame below, and stop when moving to the position below the top end of the third bracket, and then cooperate with the fastening assembly to realize the fastening of the screw; during the fastening process, it is ensured that the screw remains vertical, which is beneficial to the stable progress of the fastening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 is the overall side view schematic diagram of the present invention;

[0023] Figure 3 is the side view schematic diagram of the first slide rail connection structure of the present invention;

[0024] Figure 4 is the upper structure schematic diagram of the second bracket of the present invention;

[0025] Figure 5 is the upper structure schematic diagram of the linkage plate of the present invention;

[0026] Figure 6 is the bottom structure schematic diagram of the output motor of the present invention;

[0027] Figure 7 is the seal ring connection structure schematic diagram of the present invention;

[0028] Figure 8 is the three-dimensional diagram of the second guide rail connection structure of the present invention;

[0029] Figure 9 is the upper structure schematic diagram of the limit rod of the present invention;

[0030] Figure 10 is the position schematic diagram of the limit block on the limit rod of the present invention;

[0031] Figure 11 is the top view schematic diagram of the loading rod of the present invention;

[0032] Figure 12 is the end structure schematic diagram of the loading chute of the present invention;

[0033] Figure 13 is the internal structure schematic diagram of the loading chute of the present invention;

[0034] Figure 14 is the end cross-sectional view schematic diagram of the loading rod of the present invention;

[0035] Figure 15 is the position schematic diagram of the inner groove of the loading rod of the present invention;

[0036] Figure 16 is the baffle connection structure schematic diagram of the present invention.

[0037] In the figure: 1, conveyor line; 11, first bracket; 12, support column; 13, storage box; 14, first slide rail; 15, first trolley; 16, connecting frame; 17, first hydraulic cylinder; 18, receiving plate; 2, second bracket; 20, receiving column; 21, cross bar; 22, feeding rod; 221, feeding trough; 222, feeding hole; 223, groove; 23, fixing plate; 231, guide rod; 24, servo motor; 25, screw; 251, push plate; 26, rectangular nut; 27, blocking block; 271, buffer spring; 272, positioning block; 201, second guide rail; 202, second trolley; 203, fixed column; 204, fixed frame; 205, pusher; 206, limit rod; 207, limit block; 3, third bracket; 31, second hydraulic cylinder; 32, linkage plate; 33, output motor; 34, friction cylinder; 35, tightening head; 36, inflation box; 361, sealing ring; 362, inflation tube; 363, cylinder; 364, piston; 365, friction block; 4, limiting plate; 41, guide plate; 42, third hydraulic cylinder; 43, linkage frame; 44, baffle. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] like Figures 1 to 16 As shown, an automatic chassis assembly device according to an embodiment of the present invention comprises a conveyor line 1, which is used to convey a chassis frame; a first bracket 11 is installed above the conveyor line 1, a pair of support columns 12 are arranged on the surface of the first bracket 11 and on both sides of the conveyor line 1, a storage box 13 is arranged at the top of the support column 12, and chassis components to be assembled are stacked inside the storage box 13; a first slide rail 14 is installed at the top of the first bracket 11, a first trolley 15 is arranged in the track of the first slide rail 14, a connecting frame 16 is arranged on the surface of the first trolley 15, a first hydraulic cylinder 17 is installed at the bottom end of the connecting frame 16, a receiving plate 18 is arranged at the output end of the first hydraulic cylinder 17, and a vacuum suction cup is arranged at the bottom end of the receiving plate 18;

[0040] At the bottom of the conveyor line 1 and on the side of the first bracket 11 away from the feeding end of the conveyor line 1, a second bracket 2 is provided. At the top of the second bracket 2, a cross bar 21 is provided. At both ends of the cross bar 21, a pair of feeding rods 22 are provided. At the top of the feeding rod 22, a feeding groove 221 is provided. On both inner walls of the feeding groove 221, a pair of grooves 223 are provided; the nut of the screw can be embedded into the groove 223; at the bottom of the feeding groove 221, a pair of discharging holes 222 are provided; at both ends of the feeding rod 22, a rectangular nut 26 is provided. Inside the rectangular nut 26, a screw rod 25 is meshed and connected. One end of the screw rod 25 penetrates into the feeding groove 221, and the other end is provided with a servo motor 24. At the position of one end of the screw rod 25 inside the feeding groove 221, a push plate 251 is provided; between the servo motor 24 and the second bracket 2, a connecting component is provided; the connecting component includes a fixing plate 23, and the fixing plate 23 is fixedly connected to the servo motor 24; at the bottom of the fixing plate 23, a guide rod 231 penetrating the side surface of the second bracket 2 is provided; at the bottom of the conveyor line 1 and on the side of the second bracket 2 away from the first bracket 11, a third bracket 3 is provided. At the top of the third bracket 3, a fastening component is provided;

[0041] Currently, for the assembly of computer cases, it is necessary to first manually attach the sealing plate part to the case frame, then place the screws into the screw holes, and finally use an auxiliary tightening gun to tighten the screws; the entire process is difficult to achieve full automation and requires workers to assist in feeding materials, placing screws, etc.; this increases labor costs and the assembly efficiency of the case is relatively low; to solve the above problems, the embodiments of the present invention are provided with a first slide rail 14, a feeding rod 22, etc.; the specific use process is as follows; when in use, the conveyor line 1 conveys the case frame and stops when it reaches below the first slide rail 14. Then, the first trolley 15 drives the first hydraulic cylinder 17 to move above the storage box 13 through the connecting frame 16. After that, the first hydraulic cylinder 17 is activated, and the first hydraulic cylinder 17 drives the vacuum suction cup at the bottom of the receiving plate 18 to the chassis components to be assembled in the storage box 13; specifically, it is a sealing plate for sealing the case. When the vacuum suction cup adsorbs and fixes the sealing plate, the first trolley 15 and the first hydraulic cylinder 17 are used to transfer the sealing plate to the case frame below the first slide rail 14, and the transfer position is kept such that the through holes on the sealing plate are aligned with the threaded holes on the case frame; then, the adsorption of the vacuum suction cup on the sealing plate is released, and the case frame is transferred to a position below the feeding rod 22 and stopped; then, the servo motor 24 is activated, and the servo motor 24 meshes and drives with the rectangular nut 26, so that the servo motor 24 drives the guide rod 231 at the bottom of the fixing plate 23 to move horizontally. At the same time, the screw 25 pushes the screws placed inside the feeding groove 221. Initially, the screws are placed in the feeding groove 221 in a row, and the nuts of the screws are inserted into the grooves 223, and the screws remain upright when moving; when the screws are pushed above the discharging hole 222, they fall downward and fall into the through holes of the sealing plate; at this time, the servo motor 24 stops starting; then, the conveyor line 1 further conveys the case frame to a position below the top of the third bracket 3 and stops, and the screws are automatically tightened through the fastening component, thereby realizing the automatic assembly of the case; finally, the assembled case is conveyed to the discharging end of the conveyor line 1 for discharging operation; repeating the above process can realize the automatic assembly of the case without the need for workers to assist in the operation; this reduces labor costs and improves the assembly efficiency of the case.

[0042] It should be noted that the end of the feeding rod 22 is detachable, exposing the end of the feeding groove 221 to facilitate the replenishment of screws.

[0043] Inside the feeding chute 221 and located at the top of a pair of blanking holes 222, there is a pair of blocking blocks 27 slidably connected. A buffer spring 271 is arranged on the side of the blocking block 27, and a positioning block 272 fixed inside the feeding chute 221 is arranged at one end of the buffer spring 271 away from the blocking block 27; Initially, the screw is located between the blocking block 27 and the push plate 251; When the push plate 251 moves, the blocking block 27 moves synchronously under the extrusion of the screw, and the blocking block 27 exposes the blocked blanking hole 222. After the screw falls through the blanking hole 222, the blocking block 27 is reset by the elastic force of the buffer spring 271 to block the blanking hole 222 again, and at the same time, the screw inside the feeding chute 221 is extruded again; Then the above blanking process can be repeated continuously; Ensure the stable falling of the screw and prevent the screw from toppling in the feeding chute 221.

[0044] On the surface of the second bracket 2, there is a receiving post 20. At the top of the receiving post 20, there is a second guide rail 201. Inside the track of the second guide rail 201, there is a second trolley 202. At the top of the second trolley 202, there is a fixed post 203. At the top of the fixed post 203, there is a fixed frame 204. At the top of the fixed frame 204, there is a pair of ejectors 205. At the output end of the ejector 205, there is a limiting rod 206. On the opposite sides of a pair of limiting rods 206, there is a limiting block 207. The clamping surface of the limiting block 207 is set as an arc surface adapted to the nut of the screw; When the screw falls out of the blanking hole 222, the ejector 205 is started to drive the limiting rods 206 to approach each other, and the screw is clamped and fixed by a pair of limiting blocks 207, and the arc surface of the limiting block 207 clamps to the nut of the screw; Then, the second trolley 202 and the second guide rail 201 move synchronously with the box frame below and stop when moving to the position below the top of the third bracket 3. Then, cooperate with the fastening assembly to realize the fastening of the screw; During the fastening process, ensure that the screw remains vertical, which is beneficial to the stable progress of the fastening process; It should be noted that the bottom end of the screw is inserted into the through hole of the sealing plate; In addition, the limiting rod 206 needs to be reset in time after the screw is tightened.

[0045] The limiting block 207 is made of rubber; When tightening the screw, the screw will rotate synchronously during clamping, and the screw rotates relative to the limiting block 207. The limiting block 207 made of rubber can reduce the resistance received by the screw during rotation, which is beneficial to the stable tightening of the screw.

[0046] The fastening assembly includes a second hydraulic cylinder 31 installed at the top of the third bracket 3. The output end of the second hydraulic cylinder 31 is provided with a linkage plate 32. The top of the linkage plate 32 is provided with a plurality of output motors 33. The output end of the output motor 33 is provided with a friction cylinder 34. The bottom end of the friction cylinder 34 is inserted with a tightening head 35. A through hole is formed in the side surface of the friction cylinder 34. A friction block 365 is arranged in the through hole. One side of the friction block 365 located in the through hole is attached to the side surface of the tightening head 35. A pressing assembly is arranged on the side of the friction block 365 located outside the through hole. When tightening the screw, the second hydraulic cylinder 31 drives the linkage plate 32 to gradually move downward. At the same time, the output motor 33 is started. The output motor 33 drives the tightening head 35 to rotate through the friction cylinder 34. When the tightening head 35 contacts the top end of the nut of the screw below, the screw is driven to rotate and move downward at the same time, and the screw is gradually tightened. When the screw is tightened to a specified torsional force magnitude, the friction block 365 rotates relative to the tightening head 35. Furthermore, it is difficult for the tightening head 35 to continue tightening the screw, which tightens the degree of the screw, and is beneficial to improving the chassis assembly quality.

[0047] The pressing assembly includes a cylinder 363. A piston 364 is arranged inside the cylinder 363. One end of the piston 364 located outside the cylinder 363 is connected to the friction block 365. The bottom end of the cylinder 363 is communicated with an air charging pipe 362. One end of the air charging pipe 362 away from the cylinder 363 is communicated with an air charging box 36. The air charging box 36 is fixed at the bottom end of the linkage plate 32 and the air charging box 36 is communicated with an air pump and a pressure relief valve. During use, the air charging box 36 is inflated through the air pump. The air charging box 36 inflates the cylinder 363 through the air charging pipe 362. The internal pressure of the cylinder 363 is the same as the internal pressure of the air charging box 36. When the internal pressure of the air charging box 36 reaches a certain level, it will automatically relieve pressure through the pressure relief valve. Therefore, during use, the air pump continuously inflates the air charging box 36, the gas pressure in the air charging box 36 is stable, and then the pressure in the cylinder 363 is stable. Therefore, the pressing force of the piston 364 in the cylinder 363 on the friction block 365 is stable, and the force of the friction block 365 pressing against the side surface of the tightening head 35 is stable, so that the tightening torsional force of the tightening head 35 on the screw is stable.

[0048] The air charging box 36 is arranged in a ring shape. A sealing ring 361 is rotatably arranged on the inner ring surface of the air charging box 36. The air charging pipe 362 penetrates through the sealing ring 361 and is communicated with the air charging box 36. When the friction cylinder 34 rotates, it will drive the friction block 365 to rotate synchronously. The friction block 365 drives the sealing ring 361 to rotate through the piston 364, the cylinder 363 and the air charging pipe 362. The sealing ring 361 rotates relative to the air charging box 36 without interference, ensuring the smoothness of the screw tightening process.

[0049] A pair of limiting plates 4 are arranged at the top of the conveyor line 1. The distance between the limiting plates 4 is the conveying width of the chassis frame, which is beneficial to improving the accuracy of the feeding position of the box frame on the conveyor line 1.

[0050] A guiding plate 41 is provided on one side of the feeding end of the conveying line 1 of the limiting plate 4; the guiding plate 41 is used for guiding and feeding the chassis frame; ensuring smooth feeding of the box frame.

[0051] A third hydraulic cylinder 42 is provided on the side of the limiting plate 4, a linkage frame 43 is provided at the output end of the third hydraulic cylinder 42, and a baffle 44 is provided at the end of the linkage frame 43 away from the third hydraulic cylinder 42; the baffle 44 is used for blocking the chassis frame at the installation screw station; when tightening the screw, the box frame needs to move below the top of the third bracket 3, and when it moves to the specified position, it will be blocked by the baffle 44, preventing the box frame from further moving due to inertia when the conveying line 1 stops, resulting in deviation when the tightening head 35 tightens the screw; after the screw is tightened, the baffle 44 is driven to move by the third hydraulic cylinder 42 and the linkage frame 43 to avoid hindering the movement of the chassis.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic chassis assembly device, characterized in that: It includes a conveyor line (1) for conveying the chassis frame; a first bracket (11) is installed above the conveyor line (1), and a pair of support columns (12) are arranged on the surface of the first bracket (11) and on both sides of the conveyor line (1). A storage box (13) is arranged at the top of the support column (12), and unassembled chassis components are stacked inside the storage box (13); a first slide rail (14) is installed at the top of the first bracket (11), a first trolley (15) is arranged in the track of the first slide rail (14), a connecting frame (16) is arranged on the surface of the first trolley (15), a first hydraulic cylinder (17) is installed at the bottom end of the connecting frame (16), and a receiving plate (18) is arranged at the output end of the first hydraulic cylinder (17). A vacuum suction cup is arranged at the bottom end of the receiving plate (18). A second bracket (2) is arranged at the bottom end of the conveyor line (1) and on the side of the first bracket (11) away from the feeding end of the conveyor line (1). A cross bar (21) is arranged at the top of the second bracket (2), and a pair of feeding rods (22) are arranged at both ends of the cross bar (21). A feeding groove (221) is opened at the top end of the feeding rod (22), and a pair of grooves (223) are opened on the inner walls of both sides of the feeding groove (221); the nut of the screw can be embedded into the groove (223); a pair of discharging holes (222) are opened at the bottom end of the feeding groove (221); rectangular nuts (26) are arranged at both ends of the feeding rod (22), and a screw rod (25) is meshed and connected inside the rectangular nut (26). One end of the screw rod (25) penetrates into the feeding groove (221), and the other end is provided with a servo motor (24). A push plate (251) is arranged at the end of the screw rod (25) located inside the feeding groove (221); a connecting component is arranged between the servo motor (24) and the second bracket (2); the connecting component includes a fixing plate (23), and the fixing plate (23) is fixedly connected with the servo motor (24); a guide rod (231) penetrating the side surface of the second bracket (2) is arranged at the bottom end of the fixing plate (23); a third bracket (3) is arranged at the bottom end of the conveyor line (1) and on the side of the second bracket (2) away from the first bracket (11), and a fastening component is arranged at the top of the third bracket (3).

2. The automatic chassis assembly device according to claim 1, characterized in that: A pair of blocking blocks (27) are slidably connected inside the feeding groove (221) and at the top of a pair of discharging holes (222). A buffer spring (271) is arranged on the side surface of the blocking block (27), and a positioning block (272) fixed inside the feeding groove (221) is arranged at the end of the buffer spring (271) away from the blocking block (27); initially, the screw is located between the blocking block (27) and the push plate (251).

3. The automatic chassis assembly device according to claim 2, characterized in that: The surface of the second bracket (2) is provided with a receiving column (20). The top of the receiving column (20) is provided with a second guide rail (201). A second trolley (202) is arranged in the track of the second guide rail (201). The top of the second trolley (202) is provided with a fixing column (203). The top of the fixing column (203) is provided with a fixing frame (204). A pair of pushing devices (205) are arranged on the top of the fixing frame (204). A limiting rod (206) is arranged at the output end of the pushing device (205). A limiting block (207) is arranged on one side where the pair of limiting rods (206) face each other. The clamping surface of the limiting block (207) is set as an arc surface adapted to the screw nut.

4. The automatic chassis assembly device according to claim 3, characterized in that: The limiting block (207) is made of rubber.

5. The automatic chassis assembly device according to claim 1, characterized in that: The fastening assembly includes a second hydraulic cylinder (31) installed at the top of the third bracket (3). A linkage plate (32) is arranged at the output end of the second hydraulic cylinder (31). A plurality of output motors (33) are arranged on the top of the linkage plate (32). A friction cylinder (34) is arranged at the output end of the output motor (33). An upper tightening head (35) is inserted at the bottom end of the friction cylinder (34); through holes are formed in the side surface of the friction cylinder (34); a friction block (365) is arranged in the through holes. One side of the friction block (365) located in the through holes is attached to the side surface of the upper tightening head (35); a pressing assembly is arranged on the side of the friction block (365) located outside the through holes.

6. The automatic chassis assembly device according to claim 5, wherein: The pressing assembly includes a cylinder (363). A piston (364) is arranged inside the cylinder (363). One end of the piston (364) located outside the cylinder (363) is connected to the friction block (365); an air charging pipe (362) is communicated and arranged at the bottom end of the cylinder (363). One end of the air charging pipe (362) far away from the cylinder (363) is communicated and arranged with an air charging box (36). The air charging box (36) is fixed at the bottom end of the linkage plate (32) and the air charging box (36) is communicated and provided with an air pump and a pressure relief valve.

7. An automatic chassis assembly device according to claim 6, characterized in that: The air charging box (36) is arranged in a ring shape; a sealing ring (361) is rotatably arranged on the inner ring surface of the air charging box (36). The air charging pipe (362) penetrates through the sealing ring (361) and is communicated with the air charging box (36).

8. The automatic chassis assembly device according to claim 1, characterized in that: A pair of limiting plates (4) are arranged at the top of the conveyor line (1). The distance between the limiting plates (4) is the conveying width of the chassis frame.

9. The automatic chassis assembly device according to claim 8, characterized in that: One side of the limiting plate (4) located at the feeding end of the conveyor line (1) is provided with a guiding plate (41); the guiding plate (41) is used for guiding and feeding the chassis frame.

10. The automatic chassis assembly device according to claim 9, characterized in that: A third hydraulic cylinder (42) is arranged on the side surface of the limiting plate (4). A linkage frame (43) is arranged at the output end of the third hydraulic cylinder (42). A baffle (44) is arranged at the end of the linkage frame (43) far away from the third hydraulic cylinder (42); the baffle (44) is used for blocking the chassis frame at the installation screw station.

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