An online fixture mechanism for a U-shaped assembly line of a commercial vehicle suspension seat

Abstract

The present invention provides an online clamp mechanism for a U-shaped final assembly line of a commercial vehicle suspended seat, comprising: an online clamp frame, two groups of sliding support mechanisms on two groups of assembly line tracks, and a safety anti-collision mechanism movably connected to a driving chain mechanism for preventing the online clamp mechanism from colliding with an operator, wherein the safety anti-collision mechanism is used to drive the online clamp mechanism to move on the driving chain mechanism; the advantages of the present invention are: the overall design of the online clamp mechanism is L-shaped, a horizontal sliding mechanism installed on the top surface of the assembly line track, and two groups 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 meeting the force balance and stability of the wall-mounted walking mechanism during movement and preventing it from falling, while the spatial freedom thereof is not completely restricted along the Z-axis direction, thereby achieving a certain activity space for the walking mechanism on turning and straight tracks to prevent rapid wear.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component assembly, and in particular to an online clamp mechanism for a U-shaped general assembly line of a commercial vehicle suspension seat. 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] In response to the above technical problems, the applicant has designed a U-shaped assembly line for commercial vehicle suspended seats. However, since the traditional seat tray mechanism cannot be used on this assembly line, it has become an urgent need to redesign an online clamp mechanism specifically for commercial vehicle seat assemblies. Summary of the invention

[0009] In view of the above problems, the purpose of the present invention is to provide an online clamp mechanism for a U-shaped final assembly line of a commercial vehicle suspension seat, which is used to drive the seat tray mechanism to move on the final assembly line to overcome the shortcomings of the above-mentioned prior art.

[0010] The online clamp mechanism of the U-shaped assembly line of the commercial vehicle suspension seat provided by the present invention comprises: the online clamp mechanism comprises: an online clamp frame, two sets of sliding support mechanisms slidably connected to two sets of assembly line tracks of the U-shaped assembly line of the suspension seat, and a safety anti-collision mechanism movably connected to the driving chain mechanism for preventing the online clamp mechanism from colliding with an operator, the safety anti-collision mechanism is used to drive the online clamp mechanism to move on the driving chain mechanism;

[0011] 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;

[0012] Wherein, 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.

[0013] 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;

[0014] The first sliding frame is connected to the online clamp frame through a vertically arranged connecting pin, and nuts or baffles are arranged at both ends of the connecting pin. 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 after the first sliding frame rotates slightly.

[0015] Preferably, the first spring reset mechanism includes: a first compression spring and a first limiting column, a top cap is provided at one end of the first limiting column in contact with the first sliding frame, 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 corresponds to the position of the first sliding frame, 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.

[0016] Preferably, 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.

[0017] 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;

[0018] 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;

[0019] 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;

[0020] 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;

[0021] 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.

[0022] The advantages and positive effects of the present invention are:

[0023] 1. 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 without 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.

[0024] 2. In order to prevent possible vibration and tilting during the movement of the online clamp mechanism of the present invention, a spring structure is designed on the horizontal sliding mechanism and the vertical sliding mechanism. 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 the movement, the walking mechanism will also return to the correct position under the action of the spring force because the spring is 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 in real time. This design has low cost and high reliability.

[0025] 3. The online clamp mechanism of the present invention 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 serves 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.

[0026] 4. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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:

[0028] Figure 1 4 is a structural stereogram of an online clamp mechanism according to an embodiment of the present invention.

[0029] Figure 2 4 is a structural stereogram of a sliding support mechanism of an online clamp mechanism according to an embodiment of the present invention. Figure 3 4 is a structural stereogram of a safety anti-collision mechanism according to an embodiment of the present invention.

[0030] Figure 4 2 is a side view of the structure of the online clamp mechanism according to an embodiment of the present invention.

[0031] Figure 5 It is a structural stereogram of a cylinder ejection mechanism according to an embodiment of the present invention.

[0032] Figure 6 It is a partial structural schematic diagram of the front view of the horizontal sliding mechanism according to an embodiment of the present invention.

[0033] Figure 7 It is a partial structural schematic diagram of a top view of a horizontal sliding mechanism according to an embodiment of the present invention.

[0034] Figure 8 It is an assembly diagram of an online clamp mechanism and a U-shaped assembly line of a suspension seat according to an embodiment of the present invention.

[0035] The accompanying drawings include: online clamp frame 1, sliding support mechanism 2, safety anti-collision mechanism 3, horizontal sliding mechanism 4, vertical sliding mechanism 5, first sliding frame 6, first roller 7, first spring reset mechanism 8, connecting pin 9, first limiting column 10, first compression spring 11, second sliding frame 12, second roller 13, second spring reset mechanism 14, second compression spring 15, second limiting column 16, storage gear 3-1, storage gear frame 3-2, third spring reset mechanism 3-3, cylinder ejection mechanism 3-4, hemispherical groove 3-5, elastic pin 3-6, third reset spring 3-7, third limiting column 3-8, supporting frame 3-9, follower wheel 3-10, wiring track A, driving chain mechanism B. DETAILED DESCRIPTION

[0036] 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.

[0037] Figure 1-8 A schematic diagram of the overall structure according to an embodiment of the present invention is shown.

[0038] The present invention includes: the online clamp mechanism of the present invention is slidably connected to two groups of assembly line tracks A of the U-shaped general assembly line of the suspension seat, the online clamp mechanism slides on the two groups of assembly line tracks A through the driving chain mechanism B, and the online clamp mechanism includes: an online clamp frame 1, two groups of sliding support mechanisms 2 slidably connected to the two groups of assembly line tracks A, and a safety anti-collision mechanism 3 movably connected to the driving chain mechanism B to prevent the online clamp mechanism from colliding with the operator; the two sliding support mechanisms 2 are installed on the online clamp frame 1 at positions corresponding to the assembly line tracks A, and the safety anti-collision mechanism 3 is installed on the online clamp frame 1 between the two groups of sliding support mechanisms 2 and corresponds to the position of the driving chain mechanism B;

[0039] The sliding support mechanism 2 includes: a horizontal sliding mechanism 4 and two vertical sliding mechanisms 5. The horizontal sliding mechanism 4 drives the online clamp mechanism to slide on the top surface of the assembly line track A, and the two vertical sliding mechanisms 5 drive the online clamp mechanism to slide on the two side surfaces of the assembly line track A.

[0040] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 The horizontal sliding mechanism 4 of the present invention comprises: a first sliding frame 6, a group of five first rollers 7 installed on the first sliding frame 6 and rolling in the horizontal direction, and two first spring return mechanisms 8 supported on both sides of the first sliding frame 6; the first roller 7 moves on the top surface of the assembly line track A, and the first sliding frame 6 is connected to the online clamp frame 1 through a vertically arranged connecting pin 9, and nuts are arranged at both ends of the connecting pin 9. The connecting pin through hole on the first sliding frame 6 is interference fit with the connecting pin 9, one end of the connecting pin 9 passes through the connecting pin through hole and is connected through the nut, and the other end of the connecting pin 9 passes through the top surface of the first sliding frame 6 and is connected through the nut, and the first sliding frame 6 can rotate slightly on the connecting pin 9, which indirectly makes the first sliding frame 6 rotate. The movable frame 6 can rotate slightly relative to the assembly line frame body 1, so that the online clamp mechanism has a certain activity space on the turning and straight track to prevent rapid wear; the first spring reset mechanism 8 is used to drive the first sliding frame 6 to reset after the first sliding frame 6 rotates slightly, and the first spring reset mechanism 8 includes: a first compression spring 11 and a first limiting column 10, the end of the first limiting column 10 that contacts the first sliding frame 6 is provided with a top cap, the other end of the first limiting column 10 passes through the online clamp frame body 1 and is fixed by a nut, the installation position of the first limiting column 10 on the online clamp frame body 1 corresponds to the position of the first sliding frame 6, one end of the first compression spring 11 is supported on the top cap, and the other end of the first compression spring 11 is supported on the online clamp frame body 1;

[0041] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 The vertical sliding mechanism 5 includes: a second sliding frame 12, a group of second rollers 13 installed on the second sliding frame 12 and rolling in the vertical direction, a second spring reset mechanism 14 connecting the second sliding frame 12 and the online clamp frame 1, the second spring reset mechanism 14 includes: two second compression springs 15 and two second limiting columns 16, the two second limiting columns 16 are respectively fixedly connected to the two ends of the second sliding frame 12, the end of the second limiting column 16 away from the second sliding frame 12 passes through the online clamp frame 1 and is fixedly connected by a nut, the installation position of the second limiting column 16 on the online clamp frame 1 corresponds to the position of the second sliding frame 12, one end of the second compression spring 15 is supported on the second sliding frame 12, and the other end of the second compression spring 15 is supported on the online clamp frame 1, and the second roller 13 slides on the side of the assembly line track.

[0042] See also Figure 1 , Figure 2 , Figure 6 , Figure 7 In the present invention, two second rollers 13 are arranged on the second sliding frame 12 located on the outer side of the assembly line track A, and one second roller 13 is arranged on the second sliding frame 12 located on the inner side of the assembly line track A. Since the online clamp mechanism will generate outward centrifugal force when moving on the assembly line track A, two second rollers 13 are arranged on the outer side of the assembly line track A and one second roller 13 is arranged on the inner side of the assembly line track A in order to minimize the friction between the vertical sliding mechanism 5 and the assembly line track A, so as to reduce the power consumption of the driving motor of the driving chain mechanism B.

[0043] See also Figure 3 , Figure 4The safety anti-collision mechanism 3 of the present invention comprises: two groups of storage gears 3-1, a storage gear frame 3-2, a third spring reset mechanism 3-3, and a cylinder ejection mechanism 3-4; the storage gear 3-1 is connected to the storage gear frame 3-2 along the horizontal direction, the storage gear 3-1 is meshed with the driving chain mechanism B, the storage gear 3-1 drives the online clamp mechanism to move on the driving chain mechanism B through the storage gear frame 3-2, the storage gear frame 3-2 is fixedly connected to the online clamp mechanism through the third spring reset mechanism 3-3, twelve hemispherical grooves 3-5 are evenly arranged on the two end faces of the storage gear 3-1, and the storage gear frame 3-2 is vertically arranged There are two elastic pins 3-6, and the free ends of the elastic pins 3-6 are hemispherical. The free ends of the two elastic pins 3-6 are respectively installed in the hemispherical grooves 3-5 corresponding to the positions of the elastic pins 3-6 in the two end faces of the storage gear 3-1. When there is no external force to prevent the online clamping mechanism, the storage gear 3-1 drives the online clamping mechanism to move on the driving chain mechanism B through the two elastic pins 3-6. When there is an external force to prevent the online clamping mechanism, the free ends of the two elastic pins 3-6 are disengaged from the hemispherical grooves 3-5, and the online clamping mechanism does not move with the rotation of the storage gear 3-1, and the storage gear 3-1 idles with the driving chain mechanism B. The third spring return mechanism 3-3 includes: a third return spring 3-7, a third limiting column 3-8, one end of the third limiting column 3-8 is fixedly connected to the online clamp mechanism, and the other end of the third limiting column 3-8 passes through the storage gear frame 3-2 and is fixedly connected by bolts. The third return spring 3-7 is sleeved on the third limiting column 3-8 between the online clamp mechanism and the storage gear frame 3-2, and one end of the third return spring 3-7 is supported on the online clamp mechanism and the other end is supported on the storage gear frame 3-2; a supporting mechanism is provided below the storage gear frame 3-2. The supporting mechanism includes a supporting frame 3-9 and a follower wheel 3-10 installed on the supporting frame 3-9, the upper end of the supporting frame 3-9 is fixedly connected to the bottom of the storage gear frame 3-2, and the lower end of the supporting frame 3-9 is installed with a follower wheel 3-10, and the follower wheel 3-10 slides on the lifting plate extended from the online clamp frame 1 and parallel to the ground, and the shape of the supporting frame 3-9 is L-shaped;

[0044] The storage gear 3-1 of the present invention has two motion states:

[0045] State 1: When the storage gear 3-1 is mounted on the driving chain mechanism B and follows the driving chain mechanism B, the elastic pin 3-6 in the vertical direction of the storage gear 3-1 is in the hemispherical groove 3-5, so that the storage gear 3-1 is fixed relative to the storage gear frame 3-2 and mounted on the driving chain mechanism B, so the online clamp mechanism moves forward together with the driving chain mechanism B. When an obstacle blocks the online clamp mechanism from moving forward, the online clamp mechanism is thrusted and no longer keeps synchronous movement with the driving chain mechanism B. The storage gear 3-1 overcomes the locking force of the elastic pin 3-6 and squeezes the elastic pin 3-6 out of the hemispherical groove 3-5, so the storage gear 3-1 rolls, completing the online clamp mechanism's position holding action on the assembly line frame body 1 until the elastic pin 3-6 enters the next hemispherical groove 3-5.

[0046] State 2: When the motion state of the storage gear changes, if the online clamp mechanism is no longer subject to resistance in the forward direction before the elastic pin 3-6 enters the next hemispherical groove 3-5, the elastic pin 3-6 is reinserted into the next hemispherical groove 3-5, and the storage gear 3-1 returns to the static state from the rolling state, and the online clamp mechanism is driven by the drive chain mechanism B again and continues to move forward; if the online clamp mechanism continues to be subject to forward resistance before the elastic pin 3-6 enters the next hemispherical groove 3-5, and the forward resistance can overcome the locking force of the elastic pin, the storage gear 3-1 continues to roll until the locking force is greater than the forward resistance, and the online clamp mechanism remains relatively static with the drive chain mechanism B, that is, moves forward with the drive chain mechanism B.

[0047] The cylinder ejection mechanism 3-4 of the present invention is installed on the assembly line frame 1 at a position corresponding to the storage gear rack 3-2. The piston rod of the cylinder ejection mechanism 3-4 is supported on the storage gear rack 3-2. The piston rod drives the storage gear rack 3-2 to move and squeezes the third reset spring 3-7 of the third spring reset mechanism 3-3 to accumulate force and contract. The storage gear rack 3-2 drives the storage gear 3-1 to disengage from the drive chain mechanism B.

[0048] 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. An online fixture mechanism for a U-shaped assembly line of a commercial vehicle suspension seat, characterized in that: The online clamp mechanism comprises: an online clamp frame, two sets of sliding support mechanisms slidably connected to two sets of assembly line tracks of the U-shaped general assembly line of the suspension seat, and a safety anti-collision mechanism movably connected to the drive chain mechanism to prevent the online clamp mechanism from colliding with the 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 sliding frame is connected to the online clamp frame body through a vertically arranged connecting pin, nuts or blocking sheets are arranged at both ends of the connecting pin, the connecting pin on the first sliding frame passes through a hole and is interference-fitted with the connecting pin, the first sliding frame can slightly rotate on the connecting pin, and the first spring reset mechanism is used to drive the first sliding frame to reset after the first sliding frame slightly rotates; 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 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.

2. The online clamp mechanism for the U-shaped assembly line of a commercial vehicle suspension seat according to claim 1 is characterized in that: The first spring reset mechanism includes: a first compression spring and a first limiting column, wherein a top cap is provided at one end of the first limiting column in contact with the first sliding frame, 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 corresponds to the position of the first sliding frame, 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.

3. The online clamp mechanism for the U-shaped assembly line of a commercial vehicle suspension seat according to claim 1, characterized in that: 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.

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