Commercial vehicle suspension seat U-shaped assembly line

Abstract

The present invention provides a U-shaped final assembly line for commercial vehicle suspended seats, comprising: an assembly line frame, the assembly line frame is in a ring structure, a traveling mechanism is arranged on the assembly line frame, a plurality of online clamp mechanisms are evenly arranged on the traveling mechanism, a seat tray mechanism is installed on the online clamp mechanism; the assembly line frame comprises: a support frame and two groups of assembly line tracks, the traveling mechanism comprises: a driving chain mechanism and a driving motor for driving the driving chain mechanism, the online clamp mechanism is slidably connected to the two groups of assembly line tracks, and the online clamp mechanism slides on the two groups of assembly line tracks through the driving chain mechanism. The advantages of the present invention are: the online clamp mechanism is suspended on the side of the assembly line frame, which is different from the traditional double-speed chain linear assembly line, and the operator's operating position is moved from the upper side of the traditional double-speed chain assembly line to the side of the assembly line frame, which effectively solves the problem that the traditional linear assembly line occupies a large area and is not suitable for assembling seats with a large geometric volume.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component assembly, and in particular to a U-shaped general assembly line for commercial vehicle suspension seats. Background Art

[0002] In the manufacturing process of passenger car seat assembly, the traditional linear double-speed chain assembly line is the most common. The main assembly line uses an electric motor and a chain drive. The beginning and end of the line are equipped with elevators. The main function is to transport the online pallet from the end of the line through the lower part of the assembly line back to the beginning of the line. The assembly process of commercial vehicle suspension seat assembly is different from that of passenger car seats. The main differences are:

[0003] 1. The commercial vehicle seat assembly is wider and the seat height is higher.

[0004] 2. The number of parts in a commercial vehicle seat assembly is greater than that in a passenger vehicle seat assembly, with the average number being more than three times that of a passenger vehicle seat assembly, requiring a larger operating space when performing the final assembly process.

[0005] For the first point, in order to meet the ergonomic requirements to the greatest extent, if the double-speed chain assembly line is used to assemble the commercial vehicle suspension seat assembly, the line height of the double-speed chain assembly line must be designed to be lower (usually the design height of the double-speed chain equipment line is around 850mm). When the operator at the first station performs the loading operation, he will have to squat to complete the operation, which is a serious ergonomic problem.

[0006] Secondly, if the height of the equipment line is forcibly lowered to meet ergonomic requirements, the mechanical design will face the problem of insufficient space on the lower side of the equipment line. The fixture pallet is loaded on the upper side of the equipment line. When the operator at the last station completes the operation, the pallet will be lowered by the elevator and sent back to the head of the line by the chain from the lower side of the line. If the height of the equipment line is too low, the return structure and the elevator will not have enough room to move. Even if the space is barely enough, the original structure will have to be compressed in the mechanical design, which will reduce the reliability and safety of the main equipment line.

[0007] Thirdly, from the perspective of project cost and time, an assembly line often provides more than just final assembly services for one type of seat. Considering other aspects, the traditional equipment line is used to solve the problem, that is, the installation base of the assembly line is designed to be below the ground height (digging trenches). This is not only not conducive to the maintenance and upgrading of the assembly line, but also poses a safety risk.

[0008] Finally, for the first point alone, redesigning an assembly line specifically for commercial vehicle seat assemblies has become an urgent need. Summary of the invention

[0009] In view of the above problems, an object of the present invention is to provide a U-shaped final assembly line for commercial vehicle suspension seats, which is used to assemble commercial vehicle suspension seats to overcome the above-mentioned deficiencies in the prior art.

[0010] The commercial vehicle suspension seat U-shaped assembly line provided by the present invention comprises: an assembly line frame, the assembly line frame is in a ring structure, a walking mechanism is arranged on the assembly line frame, a plurality of online clamp mechanisms are evenly arranged on the walking mechanism, and a seat tray mechanism is installed on the online clamp mechanism;

[0011] The assembly line frame includes: a support frame and two sets of assembly line tracks arranged parallel to the ground, the two sets of assembly line tracks are installed on the support frame;

[0012] The walking mechanism includes: a driving chain mechanism and a driving motor driving the driving chain mechanism, the driving chain mechanism is arranged on the assembly line frame and located between two sets of assembly line tracks, and the driving motor is installed on the assembly line frame;

[0013] The online clamp mechanism is slidably connected to the two sets of assembly line tracks, and the online clamp mechanism slides on the two sets of assembly line tracks through a driving chain mechanism.

[0014] Preferably, the drive chain mechanism includes: a group of online clamp mechanism drive chains, a group of large gear drive chains, two large gears, a small gear, and a drive gear on a drive motor, wherein the two large gears are respectively arranged at both ends of the assembly line frame, one of the large gears is coaxially connected to a small gear, and the small gear is connected to the drive gear on the drive motor through a large gear drive chain, wherein the large gear connected to the drive motor serves as the main drive large gear, and the other large gear serves as the driven large gear, and the main drive large gear and the driven large gear are connected through the online clamp mechanism drive chain.

[0015] Preferably, two large gears are respectively arranged at both ends of the assembly line frame body in the horizontal direction through bearing seats, and the large gear serving as the main driving large gear rotates synchronously with the small gear.

[0016] Preferably, the support frame includes: multiple groups of support legs, a supporting frame installed on the multiple groups of support legs and connected to two groups of assembly line tracks, the supporting frame includes a group of connecting frames arranged along the length direction of the assembly line frame body and I-shaped frames evenly distributed on the connecting frames, and the two groups of assembly line tracks are respectively fixedly connected to the upper and lower end faces of the I-shaped frame.

[0017] Preferably, the online clamp mechanism comprises: an online clamp frame, two sets of sliding support mechanisms slidably connected to two sets of assembly line tracks, and a safety anti-collision mechanism movably connected to the drive chain mechanism to prevent the online clamp mechanism from colliding with the operator;

[0018] Among them, two sliding support mechanisms are installed on the online fixture frame at positions corresponding to the assembly line track, and the safety anti-collision mechanism is installed on the online fixture frame between the two sets of sliding support mechanisms and corresponds to the position of the driving chain mechanism;

[0019] Among them, the sliding support mechanism includes: a horizontal sliding mechanism and two vertical sliding mechanisms. The horizontal sliding mechanism drives the online clamp mechanism to slide on the top surface of the assembly line track, and the two vertical sliding mechanisms drive the online clamp mechanism to slide on the two side surfaces of the assembly line track.

[0020] Preferably, the horizontal sliding mechanism comprises: a first sliding frame, at least one group of first rollers mounted on the first sliding frame and rolling in the horizontal direction, and two first spring return mechanisms supported on both sides of the first sliding frame;

[0021] The first sliding frame is connected to the online clamp frame body by a vertically arranged connecting pin, and nuts or baffles are arranged at both ends of the connecting pin, and the connecting pin on the first sliding frame passes through the hole and is interference fit with the connecting pin. The first sliding frame can rotate slightly on the connecting pin, and the first spring reset mechanism is used to drive the first sliding frame to reset when the first sliding frame rotates slightly. The first spring reset mechanism includes: a first compression spring and a first limiting column, and a top cap is arranged at one end of the first limiting column that contacts the first sliding frame, and the other end of the first limiting column passes through the online clamp frame and is fixed by a nut. The installation position of the first limiting column on the online clamp frame body corresponds to the position of the first sliding frame, and one end of the first compression spring is supported on the top cap, and the other end of the first compression spring is supported on the online clamp frame body;

[0022] The vertical sliding mechanism includes: a second sliding frame, at least one group of second rollers installed on the second sliding frame and rolling in the vertical direction, a second spring reset mechanism connecting the second sliding frame and the online clamp frame, the second spring reset mechanism includes: two second compression springs and two second limiting columns, the two second limiting columns are respectively fixedly connected to the two ends of the second sliding frame, the end of the second limiting column away from the second sliding frame passes through the online clamp frame and is fixedly connected by a nut, the installation position of the second limiting column on the online clamp frame corresponds to the position of the second sliding frame, one end of the second compression spring is supported on the second sliding frame, the other end of the second compression spring is supported on the online clamp frame, and the second roller slides on the side of the assembly line track.

[0023] Preferably, the safety anti-collision mechanism comprises: at least one set of storage gears, a storage gear rack, a third spring reset mechanism, and a cylinder ejection mechanism;

[0024] The storage gear rotates in the horizontal direction and is connected to the storage gear frame, and the storage gear is meshed with the online clamp mechanism driving chain, and the storage gear drives the online clamp mechanism to move on the online clamp mechanism driving chain through the storage gear frame, and the storage gear frame is fixedly connected to the online clamp mechanism through a third spring reset mechanism, and a plurality of hemispherical grooves are evenly arranged on the two end surfaces of the storage gear, and two elastic pins are vertically arranged on the storage gear frame, and the free ends of the elastic pins are hemispherical, and the free ends of the two elastic pins are respectively installed in the hemispherical grooves corresponding to the positions of the elastic pins in the two end surfaces of the storage gear. When there is no external force to prevent the online clamp mechanism, the storage gear drives the online clamp mechanism to move on the online clamp mechanism driving chain through the two elastic pins. When there is an external force to prevent the online clamp mechanism, the free ends of the two elastic pins are disengaged from the hemispherical grooves, and the online clamp mechanism does not move with the rotation of the storage gear, and the storage gear idles with the online clamp mechanism driving chain;

[0025] A supporting mechanism is provided below the storage gear rack, and the supporting mechanism includes a supporting frame and a follower wheel installed on the supporting frame. The upper end of the supporting frame is fixedly connected to the bottom of the storage gear rack, and the follower wheel is installed at the lower end of the supporting frame. The follower wheel slides on a lifting plate extending from the online clamp frame body and parallel to the ground;

[0026] The third spring return mechanism includes: a third return spring and a third limit column, one end of the third limit column is fixedly connected to the online clamp mechanism, and the other end of the third limit column passes through the storage gear frame and is fixedly connected by bolts, or one end of the third limit column is fixedly connected to the storage gear frame, and the other end of the third limit column passes through the online clamp mechanism and is fixedly connected by bolts, the third return spring is sleeved on the third limit column between the online clamp mechanism and the storage gear frame, one end of the third return spring is supported on the online clamp mechanism, and the other end is supported on the storage gear frame;

[0027] The cylinder ejection mechanism is installed on the assembly line frame at a position corresponding to the storage gear rack. The piston rod of the cylinder ejection mechanism is held on the storage gear rack. The piston rod drives the storage gear rack to move and squeezes the third reset spring of the third spring reset mechanism to accumulate force and contract. The storage gear rack drives the storage gear to disengage from the online clamp mechanism drive chain.

[0028] Preferably, a safety carpet is provided under each online clamp mechanism, and the safety carpet is used to control the start and stop of the walking mechanism.

[0029] Preferably, the seat tray mechanism is a double-layer quick-change structure, and the seat tray mechanism includes: a lower support tray, an upper contour fixture installed on the lower support tray, and a rotating mechanism installed below the lower support tray for driving the lower support tray and the upper contour fixture to rotate;

[0030] Among them, the upper contour fixture is used to install the workpiece;

[0031] The lower support tray comprises: a lower support tray body, an upper tray locking mechanism installed at one end of the lower support tray body, a clamping block installed at the other end of the lower support tray body, an edge position of one end of the upper profiling fixture is clamped on the clamping block, and the other end of the upper profiling fixture is clamped on the upper tray locking mechanism;

[0032] The locking mechanism of the upper tray includes: a locking block, a locking rod, a compression spring, a stopper and an unlocking handle, one end of the locking rod is fixedly connected to the locking block, the other end of the locking rod passes through the rod through hole on the stopper and is fixedly connected to the unlocking handle, the compression spring is sleeved on the locking rod between the locking block and the stopper, one end of the compression spring is supported on the locking block, and the other end of the compression spring is supported on the stopper;

[0033] Among them, the rotating mechanism includes: a rotating seat or a rotating shaft installed at the bottom of the lower supporting tray, locking grooves are evenly distributed at the bottom of the rotating seat, and a spring locking mechanism is arranged under the rotating seat. The spring locking mechanism includes: a locking frame, a locking spring, a locking pin and a three-link mechanism. One end of the locking pin passes through the locking frame and is clamped in the locking groove. The locking spring is sleeved on the locking pin. One end of the locking spring is supported on the locking frame, and the other end of the locking spring is supported on the convex edge or nut on the locking pin. The three-link mechanism includes: a first link, a second link and a downward pressing link. One end of the first link is fixedly connected to the cantilever beam, the other end of the first link is hinged to one end of the downward pressing link, one end of the second link is hinged to the other end of the locking pin, and the other end of the second link is hinged to the downward pressing link.

[0034] Preferably, the shape of the card block is an inverted L shape, the card block is fixedly connected to the lower support tray body, and the edge position of one end of the upper profiling fixture is clamped in the card slot of the card block;

[0035] Two guide rails are arranged on the lower support tray body, the direction of the guide rails is the same as the pushing direction of the locking pin shaft, a slider is slidably connected to the guide rails, and a stopper is installed on the slider;

[0036] An adjustment seat connected to the online clamp mechanism is arranged on one end of the lower support tray located at the clamp block, at least two strip holes are arranged vertically on the adjustment seat, and the adjustment seat and the online clamp mechanism are connected by bolts inserted in the strip holes;

[0037] There are two spring locking mechanisms, which share a U-shaped pressing link. The first link and the second link are hingedly connected at two free ends of the pressing link, and one end of the pressing link away from the free end is a pedal end.

[0038] The advantages and positive effects of the present invention are:

[0039] 1. The online clamp mechanism of the present invention is suspended on the side of the assembly line frame. Different from the traditional double-speed chain linear assembly line, the operator's operating position is moved from the upper side of the traditional double-speed chain assembly line to the side of the assembly line frame, which effectively solves the problem that the traditional linear assembly line occupies a large area and is not suitable for assembling seats with larger geometric volumes. The U-shaped assembly line for commercial vehicle suspended seats is also equipped with a quick-change seat tray mechanism, which has the main features of adjustable clamp height and omnidirectional operation of workpieces. It is more efficient in ergonomics than traditional linear assembly lines and is easy to upgrade. In addition, it solves the problem that the traditional linear assembly line restricts the operator's range of activities and the operator can only stand on the side of the assembly line. The operator can complete the operation by rotating the tray to face the operating surface to oneself, which greatly reduces the efficiency of ergonomics and indirectly generates a large amount of non-value-added time.

[0040] 2. The overall design of the online clamp mechanism of the present invention is L-shaped, with a horizontal sliding mechanism installed on the top surface of the assembly line track, and two sets of vertical sliding mechanisms installed on the two side surfaces of the assembly line track, which are used to enable the online clamp mechanism to move on the main assembly line track, thereby satisfying the force balance and stability of the wall-mounted walking mechanism during movement and preventing it from falling, while not completely restricting its spatial freedom along the Z-axis direction (vertical), thereby achieving a certain amount of activity space for the walking mechanism on turning and straight tracks to prevent rapid wear.

[0041] 3. In order to prevent possible vibration and tilting of the online clamp mechanism during movement, a spring structure is designed on the horizontal sliding mechanism and the vertical sliding mechanism of the present invention. The spring is installed on the roller side of the horizontal sliding mechanism and the vertical sliding mechanism. During the movement of the walking mechanism on the main line, a certain amount of offset is allowed. Once the walking mechanism deviates from the predetermined track due to some unpredictable reasons during movement, the walking mechanism will return to the correct position under the action of the spring force because springs are installed on the moving mechanism (i.e., the drum and the roller). That is to say, the spring force will always act on the track perpendicular to the movement direction of the walking mechanism, and the moving track of the walking mechanism will be corrected immediately. This design is low-cost and has high reliability.

[0042] 4. Compared with the traditional assembly line, the U-shaped assembly line of the commercial vehicle suspended seat of the present invention has the characteristic of adjustable assembly height, which is mainly reflected in the design of the online clamp mechanism; the height of the commercial vehicle seat assembly is higher than that of the passenger car seat assembly. Among them, the height (Z-axis direction) of the seat assembly represented by heavy trucks exceeds 1.1m, and the seat assemblies of medium and light trucks are different. Considering the flexibility and compatibility of the assembly line, the U-shaped assembly line of the commercial vehicle suspended seat adopts an adjustable clamp height design. It can be seen from the height adjustment structure that the online clamp mechanism and the seat tray mechanism do not adopt an integral design, but are split into two parts. The middle adjustment seat is used as a connecting structure. The adjustment seat has 4 oblong holes as adjustable limiters. When the production line needs to switch products, the installation height of the clamp can be adjusted according to the most suitable height, so that the assembly line can adapt to the assembly needs of different types of seat products and effectively control the ergonomic level in a relatively good situation, which is not available in traditional assembly lines.

[0043] 5. The present invention adopts a safety carpet instead of grating protection. Due to the structural characteristics of the U-shaped assembly line of commercial vehicle seats, the operating station is designed with a walking mechanism and installed on both sides of the equipment line. The operator of the traditional equipment line operates directly on the upper surface of the main line body, while the operator of this equipment line needs to operate around the walking mechanism (clamp) to provide better ergonomics. If a grating is used as a safety device, the installation position of the grating device must be above the assembly line and the fixture. The scanning area of ​​the grating will overlap with the operator's working area, causing the operator to be unable to work. Therefore, since the problem cannot be solved from the upper side, the working position of the safety device is moved from the upper side to the lower side. The safety carpet is laid flat on the horizontal ground, and the safety carpet only receives pressure signals when working, and does not scan the operating area like the safety grating. This solves the problem of overlap between the scanning space and the operating space, and meets the safety protection needs of the equipment line, that is, it reduces the manufacturing cost and design difficulty of the production line from the side, and reduces the manufacturing cycle of the assembly line.

[0044] 6. The present invention adds a safety anti-collision mechanism. Considering the functional failure of electronic equipment in complex environments due to various uncertain reasons, the U-shaped assembly line of commercial vehicle suspension seats not only uses pressure carpets, but also fundamentally avoids the risk of the online clamp mechanism knocking down the operator when moving in the design of the mechanical structure; wherein, the storage gear realizes the movement of the online clamp mechanism through a set of two gears that can roll on the drive chain. Taking the first station (seat connection station) and the second station (inner guard plate and safety lock assembly station) as examples, when the operator of the first station completes the operation, the walking mechanism (clamp) of this station is released. At this time, the main line body PLC receives the release command, and the clamp will be released at the appropriate time. However, if the release conditions are met and the clamp is released, the operator of the second station enters between the two stations again for some reason, and the pressure carpet is also stepped on. However, at this time, the online clamp mechanism of the previous station has been released and is moving. At this time, the main line body cannot automatically handle the situation that the operator enters between the two operating stations. The online clamp mechanism will still move forward at the default speed. This is the situation where the walking mechanism (clamp) may contact the operator. When the online clamp mechanism contacts the operator, the online clamp mechanism continues to move forward. When the operator's body supports the online clamp mechanism, the storage gear on the online clamp mechanism plays a role. The online clamp mechanism can be maintained at a different relative position with the ground under human power. The storage gear begins to be driven by the chain and rolls along its axis. The commercial vehicle suspension seat U-shaped assembly line of the present invention is composed of a double protection design of a pressure carpet and a storage gear mechanism. The pressure carpet is used as a basic electrical protection device. When the electrical protection device fails due to some unpredictable reasons, the mechanical system plays a role of secondary protection, which largely compensates for the safety hazards caused by the failure of the electrical system.

[0045] 7. The present invention adopts a double-layer quick-change pallet structure, which is essentially a new online profiling fixture that breaks the existing pallet design mode. The lower layer serves as the online fixture body and plays a fixing and clamping role. The upper pallet serves as a replaceable profiling fixture and plays a positioning role. The lower pallet fixes the upper pallet by clamping. When the maintenance team switches the pallet (upper profiling fixture) on the assembly line, it only needs to pull the locking handle of the lower pallet to unlock the upper pallet and take it out. The unlocking handle of the lower pallet is designed as one, and the opposite side is fixed by an inverted L-shaped block to minimize the number of unlocking handles for easy operation. Due to the clamping and locking method, the entire loading and unloading process does not require any fastening bolts to be screwed, and replacement is more convenient. The upper pallet is a profiling fixture that can make different profiling designs corresponding to different product seat assemblies, that is, the upper pallet can correspond to a single product. Compared with the compatibility modification scheme adopted by the traditional assembly line pallet in dealing with multi-product compatibility, the quick-change design mode is undoubtedly a solution with lower technical difficulty, higher reliability and low cost. In addition, in order to achieve better ergonomic efficiency, the upper pallet is designed with two loading and unloading handles. When the maintenance team replaces the pallet, they can directly remove the upper pallet from the lower pallet through the handles.

[0046] 8. The online full pallet (contact clamp) replacement time of the seat tray mechanism of the present invention is set within 2 minutes. The upper contour clamp is fixed by a snap-in method, and no bolts need to be disassembled during replacement. The upper pallet (contact clamp) is fixed to the lower pallet body by a snap-in method. When performing disassembly and assembly operations, the operator only needs to pull the fixed baffle by hand to achieve disassembly. Compared with the compatibility modification of the clamp, this design method has higher reliability and lower cost. In addition, the quick-change pallet must be light and have good ergonomic efficiency. The upper movable pallet (contact clamp) is made of aluminum material and is equipped with a loading and unloading handle to achieve the purpose of lightness. In combination with a pallet loader, it is convenient and easy for the operator to perform replacement operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0048] Figure 1 It is a stereoscopic diagram of the overall structure according to an embodiment of the present invention.

[0049] Figure 2 It is a side view of the overall structure according to an embodiment of the present invention.

[0050] Figure 3 Schematic diagram of the connection structure between the walking mechanism and the driving motor according to an embodiment of the present invention.

[0051] Figure 4 4 is a structural stereogram of an online clamp mechanism according to an embodiment of the present invention.

[0052] Figure 5 4 is a structural stereogram of a sliding support mechanism of an online clamp mechanism according to an embodiment of the present invention.

[0053] Figure 6 4 is a structural stereogram of a safety anti-collision mechanism according to an embodiment of the present invention.

[0054] Figure 7 2 is a side view of the structure of the online clamp mechanism according to an embodiment of the present invention.

[0055] Figure 8 It is a three-dimensional diagram of the structure of a seat tray mechanism according to an embodiment of the present invention.

[0056] Fig. 9 It is a structural stereogram of a cylinder ejection mechanism according to an embodiment of the present invention.

[0057] Fig.10 FIG. 2 is a side view of a seat tray mechanism according to an embodiment of the present invention.

[0058] Fig.11 It is a partial structural schematic diagram of the front view of the horizontal sliding mechanism according to an embodiment of the present invention.

[0059] Fig.12 It is a partial structural schematic diagram of a top view of a horizontal sliding mechanism according to an embodiment of the present invention.

[0060] Fig.13 Schematic diagram of the structure of a spring locking mechanism according to an embodiment of the present invention.

[0061] The reference numerals include: assembly line frame 1, support frame 1-1, assembly line track 1-2, support leg 1-3, load-bearing frame 1-4, connecting frame 1-5, I-shaped frame 1-6, walking mechanism 2, drive chain mechanism 2-1, drive motor 2-2, online clamp mechanism drive chain 2-3, large gear drive chain 2-4, large gear 2-5, 2-8, small gear 2-6, drive gear 2-7, large gear bearing seat 2-9, online clamp mechanism 3, online clamp Frame 3-1, sliding support mechanism 3-2, safety anti-collision mechanism 3-3, horizontal sliding mechanism 3-4, vertical sliding mechanism 3-5, first sliding frame 3-6, first roller 3-7, first spring return mechanism 3-8, connecting pin 3-9, first limit column 3-10, first compression spring 3-11, second sliding frame 3-12, second roller 3-13, second spring return mechanism 3-14, second compression spring 3-15, second limit column 3-16 , storage gear 3-3-1, storage gear rack 3-3-2, third spring return mechanism 3-3-3, cylinder ejection mechanism 3-3-4, hemispherical groove 3-3-5, elastic pin 3-3-6, third return spring 3-3-7, third limit column 3-3-8, seat tray mechanism 4, lower support tray 4-1, upper contour fixture 4-2, rotating mechanism 4-3, lower support tray body 4-4, upper tray locking mechanism 4-5, locking pressure block 4-6, Locking connecting rod 4-7, compression spring 4-8, block 4-9, locking block 4-9-1, unlocking handle 4-10, rotating seat 4-11, spring locking mechanism 4-12, locking frame 4-13, locking spring 4-14, locking pin 4-15, first connecting rod 4-16, second connecting rod 4-17, pressing connecting rod 4-18, guide rail 4-19, slider 4-20, block 4-21, adjusting seat 4-22, vertical strip hole 4-23, cantilever beam 4-24. DETAILED DESCRIPTION

[0062] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0063] Figure 1-13 A schematic diagram of the overall structure according to an embodiment of the present invention is shown.

[0064] The present invention comprises: an assembly line frame 1, the assembly line frame 1 is in a long ring structure, so that the first station and the last station of the assembly line frame 1 are on the same side, the assembly line frame 1 is provided with a walking mechanism 2, the walking mechanism 2 is used to move on the assembly line frame 1, ten online clamping mechanisms 3 are evenly arranged on the walking mechanism 2, the online clamping mechanisms 3 move on the assembly line frame 1 through the walking mechanism 2, and a seat tray mechanism 4 is installed on the online clamping mechanism 3, and the seat tray mechanism 4 is used to place workpieces;

[0065] See also Figure 1 The assembly line frame body 1 of the present invention comprises: a support frame 1-1 and two groups of assembly line tracks 1-2 arranged parallel to the ground, the two groups of assembly line tracks 1-2 are installed on the support frame 1-1, and the shape of the assembly line tracks 1-2 is a long ring structure. The support frame 1-1 comprises: multiple groups of support legs 1-3, and a bearing frame 1-4 installed on the multiple groups of support legs 1-3 to connect the two groups of assembly line tracks 1-2. The bearing frame 1-4 comprises a group of connecting frames 1-5 arranged along the length direction of the assembly line frame body 1 and I-shaped frames 1-6 evenly arranged on the connecting frames 1-6. The two groups of assembly line tracks 1-2 are respectively fixedly connected to the upper and lower end faces of the I-shaped frames 1-6.

[0066] See also Figure 1-Figure 3 The walking mechanism 2 of the present invention includes: a driving chain mechanism 2-1 and a driving motor 2-2 that drives the driving chain mechanism 2-1. The driving chain mechanism 2-1 is arranged on the assembly line frame 1 and is located between two sets of assembly line tracks 1-2. The driving motor 2-2 is installed on the assembly line frame through a driving motor bracket; the driving chain mechanism 2-1 includes: a set of online clamp mechanism driving chains 2-3, a set of large gear driving chains 2-4, two large gears 2-5, 2-8, a small gear 2-6, and a driving gear 2-7 on the driving motor 2-2, wherein the large gear 2-5 and the large gear 2-8 are respectively installed at both ends of the assembly line frame through two large gear bearing seats 2-9, and the large gear 2-5 and the large gear 2-8 are horizontally arranged on the two assembly line tracks. 1-2, the radius of the two large gears 2-5 and the large gear 2-8 is the same as the radius of the semicircular track at both ends of the assembly line track 1-2, and the installation positions of the two large gears 2-5 and the large gear 2-8 correspond to the positions of the semicircular track of the assembly line track 1-2, and a small gear 2-6 is coaxially connected to one of the large gears 2-5, and the large gear 2-5 and the small gear 2-6 rotate synchronously, and the small gear 2-6 is connected to the driving gear 2-7 on the driving motor 2-2 through a large gear driving chain 2-4, wherein the large gear 2-5 connected to the driving motor 2-2 serves as the main driving large gear, and the other large gear 2-8 serves as the driven large gear, and the main driving large gear and the driven large gear are connected through the online clamp mechanism driving chain 2-3.

[0067] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 , Fig.11 , Fig.12 The online clamp mechanism 3 of the present invention is slidably connected to the two groups of assembly line tracks 1-2. The online clamp mechanism 3 slides on the two groups of assembly line tracks 1-2 through the driving chain mechanism 2-1. The online clamp mechanism 3 includes: an online clamp frame 3-1, two groups of sliding support mechanisms 3-2 slidably connected to the two groups of assembly line tracks 1-2, and a safety anti-collision mechanism 3-3 movably connected to the driving chain mechanism 2-1 to prevent the online clamp mechanism from colliding with the operator; the two sliding support mechanisms 3-2 are installed on the online clamp frame 3-1 at positions corresponding to the assembly line tracks 1-2, and the safety anti-collision mechanism 3-3 is installed on the online clamp frame 3-1 between the two groups of sliding support mechanisms 3-2 and corresponds to the position of the driving chain mechanism 2-1;

[0068] The sliding support mechanism 3-2 includes: a horizontal sliding mechanism 3-4 and two vertical sliding mechanisms 3-5. The horizontal sliding mechanism 3-4 drives the online clamp mechanism 3-1 to slide on the top surface of the assembly line track 1-2, and the two vertical sliding mechanisms 3-5 drive the online clamp mechanism to slide on the two side surfaces of the assembly line track 1-2.

[0069] See also Figure 4-Figure 7The horizontal sliding mechanism 3-4 of the present invention comprises: a first sliding frame 3-6, a group of five first rollers 3-7 installed on the first sliding frame 3-6 and rolling in the horizontal direction, and two first spring return mechanisms 3-8 supported on both sides of the first sliding frame 3-6; the first roller 3-7 moves on the top surface of the assembly line track 1-2, and the first sliding frame 3-6 is connected to the online clamp frame 1 through a vertically arranged connecting pin 3-9, and nuts are arranged at both ends of the connecting pin 3-9. The connecting pin through hole on the first sliding frame 3-6 is interference fit with the connecting pin 3-9, one end of the connecting pin 3-9 passes through the connecting pin through hole and is connected by the nut, and the other end of the connecting pin 3-9 passes through the top surface of the first sliding frame 3-6 and is connected by the nut. The first sliding frame 3-6 can rotate slightly on the connecting pin 3-9, which indirectly makes The first sliding frame 3-6 can rotate slightly relative to the assembly line frame body 1, so that the online clamp mechanism 3 has a certain activity space on the turning and straight track to prevent rapid wear; the first spring reset mechanism 3-8 is used to drive the first sliding frame 3-6 to reset after the first sliding frame 3-6 rotates slightly, and the first spring reset mechanism 3-8 includes: a first compression spring 3-11 and a first limiting column 3-10, the end of the first limiting column 3-10 that contacts the first sliding frame 3-6 is provided with a top cap, the other end of the first limiting column 3-10 passes through the online clamp frame 3 and is fixed by a nut, the installation position of the first limiting column 3-10 on the online clamp frame 3 corresponds to the position of the first sliding frame 3-6, one end of the first compression spring 3-11 is supported on the top cap, and the other end of the first compression spring 3-11 is supported on the online clamp frame 3;

[0070] The vertical sliding mechanism 3-5 includes: a second sliding frame 3-12, a group of second rollers 3-13 installed on the second sliding frame 3-12 and rolling in the vertical direction, a second spring reset mechanism 3-14 connecting the second sliding frame 3-12 and the online clamp frame 3, the second spring reset mechanism 3-14 includes: two second compression springs 3-15 and two second limiting columns 3-16, the two second limiting columns 3-16 are respectively fixedly connected to the two ends of the second sliding frame 3-12, the end of the second limiting column 3-16 away from the second sliding frame 3-12 passes through the online clamp frame 3 and is fixedly connected by a nut, the installation position of the second limiting column 3-16 on the online clamp frame 3 corresponds to the position of the second sliding frame 3-12, one end of the second compression spring 3-15 is supported on the second sliding frame 3-12, and the other end of the second compression spring 3-15 is supported on the online clamp frame 3, and the second roller 3-13 slides on the side of the assembly line track.

[0071] See also Figure 5Two second rollers 3-13 are arranged on the second sliding frame 3-12 located on the outer side of the assembly line track 1-2, and one second roller 3-13 is arranged on the second sliding frame 3-12 located on the inner side of the assembly line track 1-2. Since the online clamp mechanism 3 will generate outward centrifugal force when moving on the assembly line track 1-2, two second rollers 3-13 are arranged on the outer side of the assembly line track 1-2 and one second roller 3-13 is arranged on the inner side of the assembly line track 1-2 in order to minimize the friction between the vertical sliding mechanism 3-5 and the assembly line track 1-2, so as to reduce the power consumption of the drive motor 2-2.

[0072] See also Figure 6 , Figure 7The safety anti-collision mechanism 3-3 of the present invention comprises: two groups of storage gears 3-3-1, a storage gear frame 3-3-2, a third spring reset mechanism 3-3-3, and a cylinder ejection mechanism 3-3-4; the storage gear 3-3-1 is connected to the storage gear frame 3-3-2 by rotating in the horizontal direction, the storage gear 3-3-1 is meshed with the online clamp mechanism driving chain 2-3, the storage gear 3-3-1 drives the online clamp mechanism 3 to move on the online clamp mechanism driving chain 2-3 through the storage gear frame 3-3-2, the storage gear frame 3-3-2 is fixedly connected to the online clamp mechanism 3 through the third spring reset mechanism 3-3-4, twelve hemispherical grooves 3-3-5 are evenly arranged on the two end faces of the storage gear 3-3-1, and the storage gear frame 3-3-2 is vertically connected to the storage gear frame 3-3-2. Two elastic pins 3-3-6 are provided, and the free ends of the elastic pins 3-3-6 are hemispherical. The free ends of the two elastic pins 3-3-6 are respectively installed in the hemispherical grooves 3-3-5 corresponding to the positions of the elastic pins 3-3-6 in the two end faces of the storage gear 3-3-1, wherein, when there is no external force to prevent the online clamp mechanism 3, the storage gear 3-3-1 drives the online clamp mechanism 3 to move on the online clamp mechanism driving chain 2-3 through the two elastic pins 3-3-6, wherein, when there is an external force to prevent the online clamp mechanism 3, the free ends of the two elastic pins 3-3-6 are disengaged from the hemispherical grooves 3-3-5, and the online clamp mechanism 3 does not move with the rotation of the storage gear 3-3-1, and the storage gear 3-3-1 idles with the online clamp mechanism driving chain 2-3. The third spring return mechanism 3-3-4 includes: a third return spring 3-3-7 and a third limit column 3-3-8. One end of the third limit column 3-3-8 is fixedly connected to the online clamp mechanism 3. The other end of the third limit column 3-3-8 passes through the storage gear frame 3-3-2 and is fixedly connected by bolts. The third return spring 3-3-7 is sleeved on the third limit column 3-3-8 between the online clamp mechanism 3 and the storage gear frame 3-3-2. One end of the third return spring 3-3-7 is supported on the online clamp mechanism 3. The other end of the third limit column 3-3-8 is fixedly connected to the online clamp mechanism 3. The end is held on the storage gear rack 3-3-2; a supporting mechanism is arranged below the storage gear rack 3-3-2, and the supporting mechanism includes a supporting frame 3-3-9 and a follower wheel 3-3-10 installed on the supporting frame 3-3-9. The upper end of the supporting frame 3-3-9 is fixedly connected to the bottom of the storage gear rack 3-3-2, and the follower wheel 3-3-10 is installed on the lower end of the supporting frame 3-3-9. The follower wheel 3-3-10 slides on the lifting plate extending from the online clamp frame 3-1 and parallel to the ground. The shape of the supporting frame 3-3-9 is L-shaped;

[0073] The storage gear 3-3-1 of the present invention has two motion states:

[0074] State 1: When the storage gear 3-3-1 is mounted on the online clamp mechanism driving chain 2-3 along with the online clamp mechanism driving chain 2-3, the elastic pin 3-3-6 in the hemispherical groove 3-3-5 perpendicular to the storage gear 3-3-1 makes the storage gear 3-3-1 fixed relative to the storage gear frame 3-3-2 and mounted on the online clamp mechanism driving chain 2-3, so that the online clamp mechanism 3 moves forward together with the online clamp mechanism driving chain 2-3. When an obstacle blocks the online clamp mechanism 3 from moving forward, the online clamp mechanism 3 is no longer synchronized with the online clamp mechanism driving chain 2-3 due to the thrust applied to the online clamp mechanism 3, and the storage gear 3-3-1 overcomes the locking force of the elastic pin 3-3-6 and squeezes the elastic pin 3-3-6 out of the hemispherical groove 3-3-5, so that the storage gear 3-3-1 rolls, completing the position maintenance action of the online clamp mechanism 3 on the assembly line frame 1 until the elastic pin 3-3-6 enters the next hemispherical groove 3-3-5.

[0075] State 2: When the motion state of the storage gear changes, if the online clamp mechanism 3 is no longer subject to resistance in the forward direction before the elastic pin 3-3-6 enters the next hemispherical groove 3-3-5, the elastic pin 3-3-6 is reinserted into the next hemispherical groove 3-3-5, and at this time the storage gear 3-3-1 returns to the static state from the rolling state, and the online clamp mechanism 3 is driven by the online clamp mechanism driving chain 2-3 again and continues to move forward; if the online clamp mechanism 3 continues to be subject to resistance in the forward direction before the elastic pin 3-3-6 enters the next hemispherical groove 3-3-5, and the resistance in the forward direction can overcome the locking force of the elastic pin, the storage gear 3-3-1 continues to roll until the locking force is greater than the resistance in the forward direction, and the online clamp mechanism 3 remains relatively static with the online clamp mechanism driving chain 2-3, that is, it moves forward together with the online clamp mechanism driving chain 2-3.

[0076] See also Fig. 9 The cylinder ejection mechanism 3-3-4 of the present invention is installed on the assembly line frame 1 at a position corresponding to the storage gear frame 3-3-2. The piston rod of the cylinder ejection mechanism 3-3-4 is supported on the storage gear frame 3-3-2. The piston rod drives the storage gear frame 3-3-2 to move and squeezes the third return spring 3-3-7 of the third spring return mechanism 3-3-4 to accumulate force and contract. The storage gear frame 3-3-2 drives the storage gear 3-3-1 to disengage from the online clamp mechanism drive chain 2-3.

[0077] In the present invention, a safety carpet is arranged below each online clamp mechanism 3 , and the safety carpet is used to control the start and stop of the walking mechanism 2 .

[0078] See also Fig. 9 , Fig.10 , Fig.13The seat tray mechanism 4 of the present invention is a double-layer quick-change structure. The seat tray mechanism 4 includes: a lower support tray 4-1, an upper profiling fixture 4-2 installed on the lower support tray 4-1, and a rotating mechanism 4-3 installed below the lower support tray 4-1 for driving the lower support tray 4-1 and the upper profiling fixture 4-2 to rotate; the upper profiling fixture 4-2 is used to install the workpiece; the lower support tray 4-1 includes: a lower support tray body 4-4, an upper tray locking mechanism 4-5 installed at one end of the lower support tray body 4-4, and a clamping block 4-21 installed at the other end of the lower support tray body 4-4, the edge position of one end of the upper profiling fixture 4-2 is clamped on the clamping block 4-21, and the other end of the upper profiling fixture 4-2 is clamped on the upper tray locking mechanism 4-5; the upper tray locking mechanism 4-5 includes: a locking pressure block 4-6, a locking connecting rod 4-7, a compression spring 4-8, a stopper 4-9 and unlocking handle 4-10, one end of the locking link 4-7 is fixedly connected to the locking pressure block 4-6, and the other end of the locking link 4-7 passes through the link through hole on the block 4-9 and is fixedly connected to the unlocking handle 4-10, the compression spring 4-8 is sleeved on the locking link 4-7 between the locking pressure block 4-6 and the block 4-9, one end of the compression spring 4-8 is supported on the locking pressure block 4-6, and the other end of the compression spring 4-8 is supported on the block 4-9. A locking stopper 4-9-1 is vertically arranged in the mounting groove on the stopper 4-9, the link through hole is arranged on the locking stopper 4-9-1, and the locking stopper 4-9-1 is vertically arranged with a through hole, and a through hole with the same diameter as the through hole is arranged at the position corresponding to the through hole on the mounting groove of the locking link 4-7 and the block 4-9, and the three through holes are fixedly connected by a tightening bolt to prevent the operator from operating incorrectly.

[0079] See also Fig. 9 , Fig.10The rotating mechanism 4-3 of the present invention comprises: a rotating seat 4-11 installed at the bottom of the lower support tray 4-1, locking grooves are evenly arranged at the bottom of the rotating seat 4-11, and a spring locking mechanism 4-12 is arranged below the rotating seat 4-11. The spring locking mechanism 4-12 comprises: a locking frame 4-13, a locking spring 4-14, a locking pin 4-15 and a three-link mechanism, one end of the locking pin 4-15 passes through the locking frame 4-13 and is clamped in the locking groove, the locking spring 4-14 is sleeved on the locking pin 4-15, and one end of the locking spring 4-14 is held on the locking frame 4-13. The other end of the locking spring 4-14 is supported on the convex edge of the locking pin 4-15, and the three-link mechanism includes: a first link 4-16, a second link 4-17 and a downward pressing link 4-18. One end of the first link 4-16 is fixedly connected to the cantilever beam 4-24, and the cantilever beam 4-24 is installed at the bottom of the lower support tray 4-1. The other end of the first link 4-16 is hinged to one end of the downward pressing link 4-18, one end of the second link 4-17 is hinged to the other end of the locking pin 4-15, and the other end of the second link 4-17 is hinged to the downward pressing link On the connecting rod 4-18, the shape of the card block 4-21 is an inverted L shape, the card block 4-21 is fixedly connected to the lower support tray body 4-4, and the edge position of one end of the upper profiling fixture 4-2 is clamped in the card slot of the card block 4-21; two guide rails 4-19 are arranged on the lower support tray body 4-4, and the guide rails 4-19 are integrally connected to the lower support tray body 4-4 along the pushing direction of the locking pin shaft 4-15, and the guide rails 4-19 are slidably connected with the slider 4-20, and the block 4-9 is installed on the slider 4-20; the lower support tray 4-1 is located at the card block 4-21 An adjustment seat 4-22 connected to the online clamp mechanism 3 is provided on one end, and four vertical strip holes 4-23 are vertically arranged on the adjustment seat 4-22. The adjustment seat 4-22 and the online clamp mechanism 3 are connected by bolts inserted in the vertical strip holes 4-23; there are two spring locking mechanisms 4-12, and the two spring locking mechanisms 4-12 share a U-shaped downward pressing link 4-18. The first link 4-16 and the second link 4-17 are hinged on the two free ends of the downward pressing link 4-18, and the end of the downward pressing link 4-18 away from the free end is the pedal end.

[0080] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A U-shaped assembly line for commercial vehicle suspension seats, comprising: The assembly line frame is characterized in that the assembly line frame is in a ring structure, a walking mechanism is arranged on the assembly line frame, a plurality of online clamp mechanisms are evenly arranged on the walking mechanism, and a seat tray mechanism is installed on the online clamp mechanism; Wherein, the assembly line frame body comprises: a support frame and two sets of assembly line tracks arranged parallel to the ground, and the two sets of assembly line tracks are installed on the support frame; Wherein, the walking mechanism comprises: a driving chain mechanism and a driving motor driving the driving chain mechanism, the driving chain mechanism is arranged on the assembly line frame and located between two sets of the assembly line tracks, and the driving motor is installed on the assembly line frame; Wherein, the online clamp mechanism is slidably connected to the two sets of assembly line tracks, and the online clamp mechanism slides on the two sets of assembly line tracks through the driving chain mechanism; The online clamp mechanism comprises: an online clamp frame, two sets of sliding support mechanisms slidably connected to the two sets of assembly line tracks, and a safety anti-collision mechanism movably connected to the drive chain mechanism to prevent the online clamp mechanism from colliding with an operator, and the safety anti-collision mechanism is used to drive the online clamp mechanism to move on the drive chain mechanism; Wherein, the two sliding support mechanisms are installed on the online fixture frame at positions corresponding to the assembly line track, and the safety anti-collision mechanism is installed on the online fixture frame between the two sets of sliding support mechanisms and corresponds to the position of the driving chain mechanism; Wherein, the sliding support mechanism comprises: a horizontal sliding mechanism and two vertical sliding mechanisms, the horizontal sliding mechanism drives the online clamp mechanism to slide on the top surface of the assembly line track, and the two vertical sliding mechanisms drive the online clamp mechanism to slide on the two side surfaces of the assembly line track; The horizontal sliding mechanism comprises: a first sliding frame, at least one group of first rollers mounted on the first sliding frame and rolling in the horizontal direction, and two first spring return mechanisms supported on both sides of the first sliding frame; The first and second limit stops are formed on the one hand, and the first limit stop is formed on the other hand, and the limit stop is formed on the second limit stop by the nut. The vertical sliding mechanism comprises: a second sliding frame, at least one group of second rollers installed on the second sliding frame and rolling in the vertical direction, a second spring reset mechanism connecting the second sliding frame and the online clamp frame body, the second spring reset mechanism comprises: two second compression springs and two second limiting posts, the two second limiting posts are respectively fixedly connected to the two ends of the second sliding frame, one end of the second limiting post away from the second sliding frame passes through the online clamp frame body and is fixedly connected by a nut. The installation position of the second limiting post on the online clamp frame body corresponds to the position of the second sliding frame, one end of the second compression spring is supported on the second sliding frame, the other end of the second compression spring is supported on the online clamp frame body, and the second roller slides on the side of the assembly line track; The safety anti-collision mechanism includes: at least one set of storage gears, a storage gear rack, a third spring reset mechanism, and a cylinder ejection mechanism; The storage gear is connected to the storage gear frame by rotating in the horizontal direction, the storage gear is meshed with the driving chain of the online clamp mechanism, the storage gear drives the online clamp mechanism to move on the driving chain of the online clamp mechanism through the storage gear frame, the storage gear frame is fixedly connected to the online clamp mechanism through the third spring reset mechanism, a plurality of hemispherical grooves are evenly distributed on the two end surfaces of the storage gear, and two elastic pins are vertically arranged on the storage gear frame, the free ends of the elastic pins are hemispherical, and the two elastic pins The free ends of the two elastic pins are respectively installed in the hemispherical grooves corresponding to the positions of the elastic pins in the two end faces of the storage gear, wherein when there is no external force to prevent the online clamping mechanism, the storage gear drives the online clamping mechanism to move on the online clamping mechanism driving chain through the two elastic pins, wherein when there is an external force to prevent the online clamping mechanism, the free ends of the two elastic pins are disengaged from the hemispherical grooves, the online clamping mechanism does not move with the rotation of the storage gear, and the storage gear idles with the online clamping mechanism driving chain; A supporting mechanism is provided below the storage gear rack, and the supporting mechanism includes a supporting frame and a follower wheel installed on the supporting frame, the upper end of the supporting frame is fixedly connected to the bottom of the storage gear rack, and the follower wheel is installed on the lower end of the supporting frame, and the follower wheel slides on a lifting plate extending from the online clamp frame and parallel to the ground; The third spring return mechanism includes: a third return spring and a third limit column, one end of the third limit column is fixedly connected to the online clamp mechanism, and the other end of the third limit column passes through the storage gear frame and is fixedly connected by bolts, or one end of the third limit column is fixedly connected to the storage gear frame, and the other end of the third limit column passes through the online clamp mechanism and is fixedly connected by bolts, the third return spring is sleeved on the third limit column between the online clamp mechanism and the storage gear frame, one end of the third return spring is supported on the online clamp mechanism, and the other end is supported on the storage gear frame; The cylinder ejection mechanism is installed on the assembly line frame at a position corresponding to the storage gear rack. The piston rod of the cylinder ejection mechanism is supported on the storage gear rack. The piston rod drives the storage gear rack to move and squeezes the third reset spring of the third spring reset mechanism to accumulate force and contract. The storage gear rack drives the storage gear to disengage from the online clamp mechanism drive chain.

2. A U-shaped assembly line for commercial vehicle suspension seats according to claim 1, characterized in that: The driving chain mechanism includes: a group of online clamp mechanism driving chains, a group of large gear driving chains, two large gears, a small gear, and a driving gear on a driving motor, wherein the two large gears are respectively arranged at both ends of the assembly line frame, and the small gear is coaxially connected to one of the large gears, and the small gear is connected to the driving gear on the driving motor through the large gear driving chain, wherein the large gear connected to the driving motor serves as the main driving large gear, and the other large gear serves as the driven large gear, and the main driving large gear and the driven large gear are connected through the online clamp mechanism driving chain.

3. A U-shaped assembly line for commercial vehicle suspension seats according to claim 2, characterized in that: The two large gears are respectively arranged at two ends of the assembly line frame body in the horizontal direction through the bearing seat, and the large gear serving as the main driving large gear rotates synchronously with the small gear.

4. The U-shaped assembly line for commercial vehicle suspension seats according to claim 1 is characterized in that: The support frame includes: multiple groups of support legs, and a bearing frame installed on the multiple groups of support legs and connected to two groups of assembly line tracks. The bearing frame includes a group of connecting frames arranged along the length direction of the assembly line frame body and I-shaped frames evenly distributed on the connecting frames. The two groups of assembly line tracks are respectively fixedly connected to the upper and lower end faces of the I-shaped frames.

5. The U-shaped assembly line for commercial vehicle suspension seats according to claim 1 is characterized in that: A safety carpet is arranged below each of the online clamp mechanisms, and the safety carpet is used to control the start and stop of the walking mechanism.

6. The U-shaped assembly line of commercial vehicle suspension seats according to claim 1, characterized in that: The seat tray mechanism is a double-layer quick-change structure, and the seat tray mechanism includes: a lower support tray, an upper contour fixture installed on the lower support tray, and a rotating mechanism installed below the lower support tray for driving the lower support tray and the upper contour fixture to rotate; Wherein, the upper contour fixture is used for mounting the workpiece; Wherein, the lower support tray comprises: a lower support tray body, an upper tray locking mechanism installed at one end of the lower support tray body, and a clamping block installed at the other end of the lower support tray body, the edge position of one end of the upper profiling fixture is clamped on the clamping block, and the other end of the upper profiling fixture is clamped on the upper tray locking mechanism; Wherein, the upper tray locking mechanism comprises: a locking pressure block, a locking connecting rod, a compression spring, a stopper and an unlocking handle, one end of the locking connecting rod is fixedly connected to the locking pressure block, the other end of the locking connecting rod passes through the connecting rod passing hole on the stopper and is fixedly connected to the unlocking handle, the compression spring is sleeved on the locking connecting rod between the locking pressure block and the stopper, one end of the compression spring is supported on the locking pressure block, and the other end of the compression spring is supported on the stopper; In which, the rotating mechanism includes: a rotating seat or a rotating shaft installed at the bottom of the lower supporting tray, locking grooves are evenly distributed at the bottom of the rotating seat, and a spring locking mechanism is arranged under the rotating seat. The spring locking mechanism includes: a locking frame, a locking spring, a locking pin and a three-link mechanism, one end of the locking pin passes through the locking frame and is clamped in the locking groove, the locking spring is sleeved on the locking pin, one end of the locking spring is supported on the locking frame, and the other end of the locking spring is supported on the convex edge or nut on the locking pin, and the three-link mechanism includes: a first connecting rod, a second connecting rod and a downward pressing connecting rod, one end of the first connecting rod is fixedly connected to the cantilever beam, the other end of the first connecting rod is hinged to one end of the downward pressing connecting rod, one end of the second connecting rod is hinged to the other end of the locking pin, and the other end of the second connecting rod is hinged to the downward pressing connecting rod.

7. A U-shaped assembly line for commercial vehicle suspension seats according to claim 6, characterized in that: The shape of the clamping block is an inverted L shape, the clamping block is fixedly connected to the lower support tray body, and the edge position of one end of the upper contour clamp is clamped in the clamping groove of the clamping block; The lower support tray body is provided with two guide rails, the direction of the guide rails is the same as the pushing direction of the locking pin shaft, the guide rails are slidably connected with a slider, and the stopper is installed on the slider; The lower support tray is located at one end of the clamping block and is provided with an adjustment seat connected to the online clamping mechanism, and at least two strip holes are vertically provided on the adjustment seat, and the adjustment seat and the online clamping mechanism are connected by bolts inserted in the strip holes; There are two spring locking mechanisms, and the two spring locking mechanisms share a U-shaped downward pressing link. The first link and the second link are hinged on the two free ends of the downward pressing link, and the end of the downward pressing link away from the free end is the pedal end.

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