New energy automobile chassis tightening production line

Abstract

The invention provides a new energy automobile chassis tightening production line which comprises a chassis, a synchronizing mechanism arranged on the chassis and brake disc tightening equipment, the synchronizing mechanism comprises an auxiliary synchronizing device, and an auxiliary synchronizing first clamping piece and an auxiliary synchronizing second clamping piece of the auxiliary synchronizing device are close to each other to clamp a lifting appliance; when a plurality of positions of the lifting appliance are clamped, the influence of errors of the distance between the lifting appliance and the auxiliary synchronous first clamping piece and the distance between the lifting appliance and the auxiliary synchronous second clamping piece is avoided, when a nut corresponding to a brake disc is tightened through brake disc tightening equipment, rotation of a driving shaft is limited, meanwhile, the nut is tightened, and then tightening of the nut on the driving shaft is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile chassis processing, and in particular to a new energy automobile chassis tightening production line. Background Art

[0002] In vehicle production and processing, it is necessary to tighten the high-torque bolts of the chassis. The following two methods are commonly used in the industry to tighten the bolts: This process is performed manually, usually requiring the vehicle to be suspended at a specified position, and then the staff operates the tightening tool to tighten the bolts. This process not only consumes a lot of manpower, but also because the vehicle needs to stay in one position for a long time and cannot enter the next workstation for processing. After the tightening is completed, it moves to the next workstation, thereby reducing the production efficiency of the vehicle; and the other method is to add a carrier vehicle, which moves synchronously with the vehicle, and automatically tightens the chassis bolts by adding an automatic tightening mechanism to the carrier vehicle.

[0003] For example, a patent document in China with application number 202310461446.3 and publication date 2023.7.28 discloses a vehicle chassis tightening device, method and computer-readable storage medium, which discloses tightening of vehicle chassis bolts; however, the device is not suitable for tightening of brake discs on drive shafts; since the drive shaft is movably arranged and the brake disc is arranged on the wheel hub bearing connected to the drive shaft, when the tightening mechanism is used to directly act on the nut of the brake disc, the drive shaft will also rotate with the nut, which will cause the brake disc to be unable to be tightened.

[0004] At the same time, the equipment connects the carrier and the sling through a synchronization mechanism. If multiple synchronization mechanisms are set, the distance between one clamping position of the sling and one synchronization mechanism, and the distance between another clamping position of the sling and another synchronization mechanism cannot be guaranteed to be completely consistent, which will be affected by errors.

[0005] Reference Figure 1 As shown, since the synchronization mechanism achieves the clamping of the sling C by the second clamping member Z2 approaching the first clamping member Z1; if a position to be clamped of the sling C contacts one of the first clamping members Z1, there is a gap V between another position to be clamped of the sling and another first clamping member X1, which will cause the other second clamping member X2 to be unable to clamp the sling when it approaches the other first clamping member X1. This will also cause unstable clamping between the sling and the carrier.

[0006] At the same time, due to the different placement angles of the bolts, the fit between the sleeve and the bolt cannot be guaranteed when the sleeve is used to tighten the bolt. When the sleeve cannot fit the bolt completely, the tightening effect on the bolt is poor. Summary of the invention

[0007] In view of this, the purpose of the present invention is to provide a new energy vehicle chassis tightening production line, which clamps the hanger by bringing the sub-synchronous first clamping part and the sub-synchronous second clamping part close to each other; when the hanger is clamped in multiple positions, it will not be affected by the error of the distance between the hanger and the sub-synchronous first clamping part and the distance between the hanger and the sub-synchronous second clamping part. When tightening the nut corresponding to the brake disc through the brake disc tightening device, the rotation of the drive shaft is restricted while the nut is tightened, thereby realizing the tightening of the nut on the drive shaft; the universal sleeve of the front and rear suspension tightening equipment is matched with the bolts at different placement angles, so as to ensure the fitting effect between the movable end of the sleeve and the front and rear suspension bolts of the vehicle, and improve the rated tightening effect of the front and rear suspension bolts.

[0008] In order to solve the above technical problems, the technical solution used in the present invention is:

[0009] The invention discloses a new energy vehicle chassis tightening production line, comprising a chassis, a synchronization mechanism arranged on the chassis, a brake disc tightening device and a front and rear suspension tightening device; the synchronization mechanism comprises a sub-synchronization device, the sub-synchronization device comprises a sub-synchronization lifting device and a sub-synchronization clamping device, the sub-synchronization lifting device is used to drive the sub-synchronization clamping device to approach or move away from a hanger, the sub-synchronization clamping device comprises a movably arranged sub-synchronization first clamping piece and a sub-synchronization second clamping piece, the sub-synchronization first clamping piece and the sub-synchronization second clamping piece are close to each other for clamping the hanger, and the sub-synchronization device drives the chassis to move with the hanger.

[0010] The brake disc tightening equipment includes a moving device and a tightening device, the moving device is used to drive the tightening device to move along the length direction, width direction and height direction of the chassis; the tightening device includes a tightening device, the tightening device includes a brake disc tightening gun, a rotating device and a tightening limit device, the tightening limit device is arranged on the rotating device, and a through opening is provided on the rotating device and the tightening limit device, and the brake disc tightening gun is inserted in the opening; the tightening limit device includes a tightening base plate, and a slot is provided on the tightening base plate, the rotating device is used to drive the slot on the tightening limit device to rotate, the slot is used to clamp the bolt of the wheel hub bearing to limit the rotation of the drive shaft, and the brake disc tightening gun is used to tighten the locking nut of the brake disc on the drive shaft.

[0011] The front and rear suspension tightening equipment includes front and rear suspension tightening drives, to which a universal sleeve is connected; the universal sleeve includes a sleeve fixed end and a sleeve movable end; the sleeve movable end is arranged on the sleeve fixed end through a universal bearing, and a sleeve spring is arranged on the sleeve fixed end, and one end of the sleeve spring abuts against the sleeve movable end.

[0012] Preferably, the tightening limit device also includes a tightening floating connector, which is connected to the tightening base plate via a self-aligning bearing; a reset spring is also provided on the tightening connector, one end of the reset spring abuts against the tightening base plate; a rotation limit assembly is also provided between the tightening floating connector and the tightening base plate, and the rotation limit assembly is used to limit the rotation of the tightening base plate relative to the tightening floating connector.

[0013] Preferably, the rotation limiting assembly is an interlocking structure provided on the opposite wall surfaces of the tightening floating connector and the tightening base plate.

[0014] Preferably, the tightening device also includes a floating device, which includes a longitudinal floating component and a transverse floating component; the tightening device is arranged on the transverse floating component, the longitudinal floating component is arranged on the moving device and is connected to the transverse floating component, and the floating device is used to offset the reaction force of the nut on the tightening device along the height direction and length direction of the tightening device.

[0015] Preferably, the longitudinal floating assembly includes a longitudinal floating bracket, with longitudinal limit plates respectively provided at both ends of the longitudinal floating bracket in the height direction, and a longitudinal floating guide column provided between the two longitudinal limit plates; a longitudinal first spring, a longitudinal second spring and a longitudinal floating block are passed through the longitudinal floating guide column; the longitudinal floating block is located between the longitudinal first spring and the longitudinal second spring, and the transverse floating assembly is connected to the longitudinal floating block.

[0016] Preferably, the transverse floating assembly includes a transverse floating bracket; the transverse floating bracket is connected to the longitudinal floating block; transverse limit plates are provided at both ends of the transverse floating bracket in the horizontal direction, and a transverse floating guide column is provided between the transverse and longitudinal limit plates; a transverse first spring, a transverse second spring and a transverse floating block are passed through the transverse floating guide column; the transverse floating block is located between the first transverse spring and the second transverse spring, and the tightening device is connected to the transverse floating block.

[0017] Preferably, the auxiliary synchronous clamping device also includes an auxiliary synchronous clamping bracket, an auxiliary synchronous first drive device and an auxiliary synchronous second drive device arranged on the auxiliary synchronous clamping bracket, the auxiliary synchronous first drive device is arranged at one end of the auxiliary synchronous clamping bracket and connected to the auxiliary synchronous first clamping member, and the auxiliary synchronous second drive device is arranged at the other end of the auxiliary synchronous clamping bracket and connected to the auxiliary synchronous second clamping member.

[0018] Preferably, the secondary synchronous second clamping member comprises a base and a swinging member, one end of the swinging member away from the first clamping member is hinged on the base, and a spring is further connected between the swinging member and the base.

[0019] Compared with the prior art, the beneficial effects of the new energy vehicle chassis tightening production line described in the present invention are mainly reflected in:

[0020] In the auxiliary synchronous clamping device, the auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member are close to each other to achieve clamping of the sling; the auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member are away from each other to achieve separation of the auxiliary synchronous clamping device and the sling; since the auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member are both movably arranged, when clamping the sling, the sling is moved between the auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member, and the auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member can be driven to clamp the sling; in this way, when clamping the sling at multiple positions, it will not be affected by the error of the distance between the sling and the auxiliary synchronous first clamping member and the distance between the sling and the auxiliary synchronous second clamping member.

[0021] The brake disc tightening equipment is used to tighten the brake disc. In the drive shaft tightening machine, a moving device is provided to drive the tightening device to move along the three-axis direction, so as to realize the position alignment of the tightening device and the drive shaft. A rotating device is provided to drive the tightening device to rotate, so that the slot corresponds to the bolt position of the wheel hub bearing. At the same time, under the action of the moving device, the slot is driven to approach the bolt of the wheel hub bearing and the bolt of the wheel hub bearing is clamped. The slot limits the movement of the bolt of the wheel hub bearing, thereby limiting the rotation of the drive shaft. When tightening the nut corresponding to the brake disc, the rotation of the drive shaft is limited by tightening the limit device, and the nut is tightened by the brake disc tightening gun, thereby realizing the tightening of the nut on the drive shaft.

[0022] At the same time, a universal sleeve is provided in the front and rear suspension tightening device; the bolts of the front and rear suspension of the vehicle are tightened by the universal sleeve; a universal bearing is provided so that the movable end of the sleeve can move relative to the fixed end of the sleeve; the movable end of the sleeve can swing under the action of external force, and when the movable end of the sleeve contacts the bolts of the front and rear suspension of the wheel, the movable end of the sleeve can cooperate with the bolts placed at different angles, ensuring the fitting effect between the movable end of the sleeve and the front and rear suspension bolts of the vehicle; at the same time, a sleeve spring is provided for resetting the movable end of the sleeve, facilitating the fitting of the movable end of the sleeve with another bolt. The tightening base plate is supported by tightening the floating connector, and a self-aligning bearing is provided so that the tightening base plate can swing along the axial direction of the opening; in this way, the tightening base plate can swing under the action of external force, and when the tightening base plate contacts the brake disc, the tightening base plate can fit with the wall of the brake disc in different states, ensuring the fitting effect between the tightening base plate and the brake disc. At the same time, a reset spring is provided to reset the tightening base plate. When the tightening base plate is separated from the brake disc, the tightening base plate is driven to reset under the elastic force of the reset spring itself, thereby driving the self-aligning bearing to reset, making it easier for the tightening base plate to cooperate with another brake disc.

[0023] The movement of the tightening base plate is limited by setting a rotation limit assembly to prevent the reaction force of the wheel hub bearing bolts on the slot from driving the tightening base plate to rotate relative to the tightening floating connector, thereby preventing the drive shaft from rotating and being unable to tighten the brake disc.

[0024] By setting up a floating device to offset the reaction force generated by the tightening brake disc, the reaction force generated by the tightening brake disc is prevented from acting on the tightening device, thereby extending the service life of the tightening device. By setting up longitudinal floating components and transverse floating components separately, the reaction forces in different directions are buffered, thereby improving the effect of offsetting the reaction forces.

[0025] In the longitudinal floating assembly, the upward reaction force is buffered by the longitudinal first spring, the downward reaction force is buffered by the longitudinal second spring, and the reaction force is buffered in the longitudinal up and down directions.

[0026] In the lateral floating assembly, the leftward reaction force is buffered by the first lateral spring, the rightward reaction force is buffered by the second lateral spring, and the reaction force is buffered in the lateral left and right directions.

[0027] In the auxiliary synchronous clamping device, an independently driven auxiliary synchronous first clamping member and an auxiliary synchronous second clamping member are arranged, which has good reliability.

[0028] The present invention clamps the sling by bringing the auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member close to each other; when the sling is clamped at multiple positions, it will not be affected by the error of the distance between the sling and the auxiliary synchronous first clamping member and the distance between the sling and the auxiliary synchronous second clamping member. When tightening the nut corresponding to the brake disc through the brake disc tightening device, the rotation of the drive shaft is restricted while the nut is tightened, thereby achieving the tightening of the nut on the drive shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0030] Figure 1 It is a schematic diagram of a synchronous mechanism clamping a sling in the prior art.

[0031] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0032] Figure 3 It is a side view of the present invention.

[0033] Figure 4 It is a front view of the present invention.

[0034] Figure 5 It is a three-dimensional schematic diagram of the brake disc tightening device in the present invention.

[0035] Figure 6 It is a front view schematic diagram of the brake disc tightening device in the present invention.

[0036] Figure 7 It is an exploded view of the floating device in the present invention.

[0037] Figure 8 It is a hierarchical diagram of the tightening device in the present invention.

[0038] Fig. 9 It is a three-dimensional schematic diagram of the tightening limit device in the present invention.

[0039] Fig.10 It is an exploded view of the tightening limit device in the present invention.

[0040] Fig.11 Schematic diagram of the brake disc installed on the wheel hub bearing.

[0041] Fig.12 It is a three-dimensional schematic diagram of the main synchronization device in the present invention.

[0042] Fig.13 It is a three-dimensional schematic diagram of the auxiliary synchronization device in the present invention.

[0043] Fig.14 for Fig.13 A is an enlarged view of the middle image.

[0044] Fig.15 It is a schematic diagram of the connection between the rear-suspension mechanical arm, the rear-suspension tightening gun and the universal sleeve in the present invention. Fig.16 It is a schematic diagram of the connection between the front suspension mechanical arm, the front suspension tightening gun and the universal sleeve in the present invention.

[0045] Fig.17 It is a three-dimensional schematic diagram of the universal sleeve in the present invention.

[0046] Fig.18 It is a schematic diagram of the walking mechanism in the present invention.

[0048] Chassis 1, synchronization mechanism 2, brake disc tightening device 3, front and rear suspension tightening device 4, walking mechanism 5, wheel hub bearing bolts 6, brake disc 7, main synchronization device 21, auxiliary synchronization device 22, moving device 31, tightening device 32, tightening device 33, floating device 34, camera 40, front suspension mechanical arm 41, rear suspension mechanical arm 42, front suspension tightening gun 43, rear suspension tightening gun 44, universal sleeve 45, walking bracket 51, walking lifting drive 52, walking device 53, auxiliary synchronization bracket 221, auxiliary Synchronous lifting device 222, auxiliary synchronous clamping device 223, longitudinal moving mechanism 311, lateral moving mechanism 312, lifting mechanism 313, brake disc tightening gun 331, rotating device 332, tightening bracket 333, tightening limit device 334, longitudinal floating component 341, lateral floating component 342, sleeve fixed end 451, sleeve movable end 452, universal bearing 453, sleeve spring 454, motor 531, walking wheel 532, auxiliary synchronous clamping bracket 2231, auxiliary synchronous first clamp Tightening member 2232, secondary synchronous second clamping member 2233, secondary synchronous first driving device 2234, secondary synchronous second driving device 2235, base 2236, swinging member 2237, spring 2238, camera device 3331, second zeroing hole 3332, tightening connecting plate 3341, tightening bottom plate 3342, tightening floating connecting member 3343, bolt limit block 3344, slot 3345, self-aligning bearing 3346, reset spring 3347, rotation limit assembly 3348, longitudinal floating Bracket 3411, longitudinal limit plate 3412, longitudinal first spring 3413, longitudinal second spring 3414, longitudinal floating block 3415, first detection part 3416, transverse floating bracket 3421, transverse limit plate 3422, transverse first spring 3423, transverse second spring 3424, transverse floating block 3425, second detection part 3426, first zeroing hole 33411, tighten the first limit piece 33481, tighten the second limit piece 33482, tighten the limit cavity 33483. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments cited are not intended to limit the present invention. In the present embodiment, it should be understood that the orientations or positional relationships indicated by terms such as "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0050] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used in the present invention are for illustrative purposes only.

[0051] This embodiment provides a new energy vehicle chassis tightening production line, such as Figure 2-18 As shown, it includes a chassis 1, a synchronization mechanism 2 arranged on the chassis 1, a brake disc tightening device 3 and a front and rear overhang tightening device 4. The synchronization mechanism 2 is used to clamp the sling and drive the chassis 1 to move with the sling; the brake disc tightening device 3 is used to tighten the brake disc. The front and rear overhang tightening device 4 is used to tighten the bolts of the front and rear overhangs of the vehicle.

[0052] The brake disc tightening device 3 includes a moving device 31 and a tightening device 32. The moving device 31 is used to drive the tightening device 32 to move along the length, width and height directions of the chassis 1. The tightening device 32 includes a tightening device 33. The tightening device 33 includes a brake disc tightening gun 331, a rotating device 332, a tightening bracket 333 and a tightening limit device 334. The tightening bracket 333 is hollow, the rotating device 332 is arranged on one side of the tightening bracket 333, the output end of the rotating device 332 is penetrated in the tightening bracket 333, the tightening limit device 334 is arranged on the rotating device 332, and a through opening is provided on the rotating device 332 and the tightening limit device 334, and the brake disc tightening gun 331 is penetrated in the opening. The brake disc tightening gun 331 is a prior art and will not be described here.

[0053] In a preferred embodiment, two brake disc tightening devices 3 are provided to tighten the nuts corresponding to the brake discs on both sides of the vehicle respectively.

[0054] The tightening limit device 334 includes a tightening connection plate 3341, a tightening base plate 3342 and a tightening floating connection piece 3343, wherein the tightening floating connection piece 3343 is arranged on one side of the tightening connection plate 3341, and the tightening base plate 3342 is arranged on one side of the tightening floating connection piece 3343; the tightening connection plate 3341 is connected to the rotating device 332. Two or more bolt limit blocks 3344 are convexly arranged on the side of the tightening base plate 3342 away from the tightening floating connection piece 3343, and a clamping groove 3345 is formed between adjacent bolt limit blocks 3344; the rotating device 332 is used to drive the clamping groove 3345 on the tightening limit device 334 to rotate, and the clamping groove 3345 is used to clamp the bolt 6 of the wheel hub bearing to limit the rotation of the drive shaft, and the brake disc tightening gun 331 is used to tighten the locking nut of the brake disc 7 on the drive shaft.

[0055] In a preferred embodiment, a plurality of the retaining grooves 3345 are provided, so that each bolt of the wheel hub bearing is retained in place; the stability of the rotation of the drive shaft is improved; adjacent bolt limit blocks 3344 are distributed along the circumference of the tightening base plate 3342, and adjacent bolt limit blocks 3344 are spaced apart; specifically, five bolt limit blocks 3344 are provided, and five retaining grooves 3345 are respectively formed between adjacent bolt limit blocks 3344.

[0056] The tightening bracket 333 is provided with a camera device 3331, and the camera device 3331 is used to identify the bolt position of the hub bearing. In a preferred embodiment, the camera device 3331 is a camera. After the bolt position of the hub bearing is identified by the camera device 3331, the rotating device 332 drives the tightening limit device 334 to rotate so that the slot 3345 is aligned with the bolt of the hub bearing. A moving device 31 is provided to drive the tightening device 32 to move along the three-axis direction, so as to align the position of the tightening device 32 with the driving shaft. A rotating device 332 is provided to drive the tightening device 32 to rotate, so that the slot 3345 corresponds to the bolt position of the wheel hub bearing. At the same time, under the action of the moving device 31, the slot 3345 is driven to approach the bolt of the wheel hub bearing and the bolt of the wheel hub bearing is clamped. The slot 3345 limits the movement of the bolt of the wheel hub bearing, thereby limiting the rotation of the driving shaft. When tightening the nut corresponding to the brake disc, the rotation of the driving shaft is limited by tightening the limit device 334, and the nut is tightened by the brake disc tightening gun 331, thereby realizing the tightening of the nut on the driving shaft.

[0057] In a preferred embodiment, the tightening floating connection 3343 is connected to the tightening base plate 3342 via a self-aligning bearing 3346; a reset spring 3347 is also provided on the tightening connection, and one end of the reset spring 3347 abuts against the tightening base plate 3342. The tightening base plate 3342 is supported by the tightening floating connection 3343, and the self-aligning bearing 3346 is provided so that the tightening base plate 3342 can swing along the axial direction of the opening; in this way, the tightening base plate 3342 can swing under the action of external force, and when the tightening base plate 3342 contacts the brake disc, the tightening base plate 3342 can fit with the wall surface of the brake disc in different states, thereby ensuring the fitting effect between the tightening base plate 3342 and the brake disc. At the same time, a reset spring 3347 is provided to reset the tightening base plate 3342. When the tightening base plate 3342 is separated from the brake disc, the elastic force of the reset spring 3347 drives the tightening base plate 3342 to reset, thereby driving the self-aligning bearing 3346 to reset, making it easier for the tightening base plate 3342 to cooperate with another brake disc.

[0058] A rotation limiter assembly 3348 is also provided between the tightening floating connector 3343 and the tightening base plate 3342, and the rotation limiter assembly 3348 is used to limit the rotation of the tightening base plate 3342 relative to the tightening floating connector 3343. By providing the rotation limiter assembly 3348 to limit the movement of the tightening base plate 3342, it is prevented that the reaction force of the bolt of the wheel hub bearing on the clamping groove 3345 drives the tightening base plate 3342 to rotate relative to the tightening floating connector 3343, and it is prevented that the drive shaft rotates and cannot tighten the brake disc.

[0059] The rotation limit assembly 3348 includes a first tightening limit member 33481 and two or more second tightening limit members 33482, wherein the second tightening limit members 33482 protrude outward from the surface of the tightening floating connection member 3343; a tightening limit cavity 33483 is formed between two adjacent second tightening limit members 33482; the first tightening limit member 33481 protrudes from the surface of the tightening base plate 3342 toward the tightening floating connection member 3343, and the first tightening limit member 33481 extends into the tightening limit cavity 33483, and the two second tightening limit members 33482 abut against the first tightening limit member 33481, thereby limiting the tightening first limit member 33481 in the clockwise direction and the counterclockwise direction respectively, thereby limiting the rotation of the tightening base plate 3342 relative to the tightening floating connection member 3343.

[0060] In a preferred embodiment, a first zeroing hole 33411 is provided on the tightening connecting plate 3341; a second zeroing hole 3332 is provided on the tightening bracket 333; the first zeroing hole 33411 and the second zeroing hole 3332 are respectively arranged to penetrate along the axial square of the opening, and the alignment position of the first zeroing hole 33411 and the second zeroing hole 3332 is the zero point of the rotating device 332; the first zeroing hole 33411 cooperates with the second zeroing hole 3332 to provide a reference position for the rotation of the tightening limit device 334.

[0061] The tightening device 32 further includes a floating device 34, which includes a longitudinal floating component 341 and a transverse floating component 342; the tightening device 33 is arranged on the transverse floating component 342, the longitudinal floating component 341 is arranged on the moving device 31 and connected to the transverse floating component 342, and the floating device 34 is used to offset the reaction force of the nut on the tightening device 33 along the height direction and the length direction of the tightening device 33. By setting the floating device 34 to offset the reaction force generated by the tightening brake disc, the reaction force generated by the tightening brake disc is prevented from acting on the tightening device 33, and the service life of the tightening device 33 is extended. By respectively setting the longitudinal floating component 341 and the transverse floating component 342, the reaction forces in different directions are buffered, and the offset effect of the reaction force is improved.

[0062] The longitudinal floating assembly 341 comprises a longitudinal floating bracket 3411, longitudinal limit plates 3412 are respectively provided at both ends of the longitudinal floating bracket 3411 in the height direction, and a longitudinal floating guide column is provided between the two longitudinal limit plates 3412; a longitudinal first spring 3413, a longitudinal second spring 3414 and a longitudinal floating block 3415 are passed through the longitudinal floating guide column; the longitudinal floating block 3415 is located between the longitudinal first spring 3413 and the longitudinal second spring 3414, and the transverse floating assembly 342 is connected to the longitudinal floating block 3415. In the longitudinal floating assembly 341, the upward reaction force is buffered by the longitudinal first spring 3413, the downward reaction force is buffered by the longitudinal second spring 3414, and the reaction force is buffered in the longitudinal up and down directions. At the same time, the diameter of the second longitudinal spring 3414 is larger than that of the first longitudinal spring 3413, and the load of the second longitudinal spring 3414 is larger than that of the first longitudinal spring 3413; the gravity of the transverse floating component 342 and the tightening device 33 acts on the second longitudinal spring 3414 through the longitudinal floating block 3415. The second longitudinal spring 3414 with a larger diameter can better bear the weight of the floating component 342 and the tightening device 33, thereby improving the supporting effect on the transverse floating component 342 and the tightening device 33.

[0063] The transverse floating assembly 342 includes a transverse floating bracket 3421; the transverse floating bracket 3421 is connected to the longitudinal floating block 3415; transverse limit plates 3422 are respectively provided at both ends of the transverse floating bracket 3421 in the horizontal direction, and a transverse floating guide column is provided between the transverse and longitudinal limit plates 3412; a transverse first spring 3423, a transverse second spring 3424 and a transverse floating block 3425 are passed through the transverse floating guide column; the transverse floating block 3425 is located between the transverse first spring 3423 and the transverse second spring 3424, and the tightening device 33 is connected to the transverse floating block 3425. In the transverse floating assembly 342, the leftward reaction force is buffered by the transverse first spring 3423, the rightward reaction force is buffered by the transverse second spring 3424, and the reaction force is buffered in the transverse left and right directions.

[0064] In a preferred embodiment, a sliding rail and a slider are provided between the transverse floating bracket 3421 and the longitudinal floating bracket 3411 to provide guidance for the longitudinal movement of the transverse floating bracket 3421; a sliding rail and a slider are provided between the tightening bracket 333 of the tightening device 33 and the transverse floating bracket 3421 to provide guidance for the transverse movement of the tightening device 33.

[0065] In a preferred embodiment, the second longitudinal spring 3414 is disposed below the first longitudinal spring 3413 , and the elastic force of the second longitudinal spring 3414 is greater than the elastic force of the first longitudinal spring 3413 .

[0066] A first detection part 3416 is provided on the longitudinal floating bracket 3411; a second detection part 3426 is provided on the transverse floating bracket 3421; the first detection part 3416 and the second detection part 3426 are both provided along the height direction of the longitudinal floating bracket 3411, and the second detection part 3426 is provided opposite to the first detection part 3416. The position change of the first detection part 3416 and the second detection part 3426 is used to detect the fatigue degree of the longitudinal first spring 3413 and the longitudinal second spring 3414. The fatigue degree of the longitudinal first spring 3413 and the longitudinal second spring 3414 is determined by the position change between the first detection part 3416 and the second detection part 3426, and the structure is simple. The fatigue degree of the longitudinal first spring 3413 and the longitudinal second spring 3414 is determined by the position change between the first detection part 3416 and the second detection part 3426, and the structure is simple. In this embodiment, the first detection portion 3416 and the second detection portion 3426 are in-situ holes; the fatigue degree of the first longitudinal spring 3413 and the second longitudinal spring 3414 is determined by detecting the change in the center position of the two in-situ holes.

[0067] In a preferred embodiment, the first detection portion 3416 and the second detection portion 3426 are provided through a pin to detect the fatigue degree of the first longitudinal spring 3413 and the second longitudinal spring 3414; if the pin passes through the two original holes horizontally, the fatigue degree of the first longitudinal spring 3413 and the second longitudinal spring 3414 is within a normal range; if the pin cannot pass through the two original holes horizontally, the first detection portion 3416 and the second detection portion 3426 are misaligned; the first longitudinal spring 3413 and the second longitudinal spring 3414 fail due to fatigue.

[0068] The moving device 31 includes a longitudinal moving mechanism 311, a transverse moving mechanism 312 and a lifting mechanism 313. The tightening device 32 is arranged on the lifting mechanism 313, the lifting mechanism 313 is arranged on the longitudinal moving mechanism 311, and the longitudinal moving mechanism 311 is arranged on the transverse moving mechanism 312; the tightening device 32 is driven to move along the length direction of the chassis 1 by the transverse moving mechanism 312. Figure 5 As shown, the lateral moving mechanism 312 drives the tightening device 32 to move along the X direction; the longitudinal moving mechanism 311 drives the tightening device 32 to move along the width direction of the chassis 1, referring to Figure 5 As shown, the longitudinal moving mechanism 311 drives the tightening device 32 to move along the Y direction; the lifting mechanism 313 drives the tightening device 32 to move along the height direction of the chassis 1, referring to Figure 5 As shown, the lifting mechanism 313 drives the tightening device 32 to move along the Z direction.

[0069] The longitudinal moving mechanism 311, the transverse moving mechanism 312, and the lifting mechanism 313 are linear drive devices such as cylinders, hydraulic drives, or gear rack drives; the linear drive device is a prior art and will not be described here.

[0070] The front and rear suspension tightening device 4 includes a front suspension mechanical arm 41, a rear suspension mechanical arm 42, and a front and rear suspension tightening drive; the front and rear suspension tightening drive includes a front suspension tightening gun 43 and a rear suspension tightening gun 44, the front suspension tightening gun 43 is connected to the front suspension mechanical arm 41, and the rear suspension tightening gun 44 is connected to the rear suspension mechanical arm 42. The front suspension mechanical arm 41 and the rear suspension mechanical arm 42 are both six-axis mechanical arms; cameras 40 are provided on the front suspension tightening gun 43 and the rear suspension tightening gun 44, and the bolts are identified by the cameras 40 to determine the bolt positions.

[0071] The front suspension tightening gun 43 and the rear suspension tightening gun 44 are respectively connected to a universal sleeve 45, and the universal sleeve 45 includes a sleeve fixed end 451 and a sleeve movable end 452; the sleeve fixed end 451 is connected to the front suspension tightening gun 43 and the rear suspension tightening gun 44; the sleeve movable end 452 is arranged on the sleeve fixed end 451 through a universal bearing 453, and a sleeve spring 454 is arranged on the sleeve fixed end 451, and one end of the sleeve spring 454 abuts against the sleeve movable end 452. The front suspension mechanical arm 41, the rear suspension mechanical arm 42, the front suspension tightening gun 43 and the rear suspension tightening gun 44 are all existing technologies and are not described here.

[0072] A universal sleeve 45 is provided in the front and rear suspension tightening device 4; the universal sleeve 45 is used to tighten the bolts of the front and rear suspension of the vehicle; a universal bearing 453 is provided to enable the sleeve movable end 452 to move relative to the sleeve fixed end 451; the sleeve movable end 452 can swing under the action of external force, and when the sleeve movable end 452 contacts the bolts of the front and rear suspension of the wheel, the sleeve movable end 452 can cooperate with the bolts at different placement angles, thereby ensuring the fitting effect between the sleeve movable end 452 and the front and rear suspension bolts of the vehicle; so that the sleeve movable end 452 can be completely sleeved on the front and rear suspension bolts of the vehicle; and a sleeve spring 454 is provided at the same time for resetting the sleeve movable end 452, so as to facilitate the sleeve movable end 452 to cooperate with another bolt.

[0073] The synchronization mechanism 2 includes a main synchronization device 21 and a secondary synchronization device 22. The main synchronization device 21 is arranged on one side of the chassis 1, and the secondary synchronization device 22 is arranged on the other side of the chassis 1. The main synchronization device 21 and the secondary synchronization device 22 are respectively used to clamp the sling. The main synchronization device 21 is a prior art, which has been disclosed in the patent document with application number CN202310461446.3, and will not be described here.

[0074] The auxiliary synchronous device 22 includes an auxiliary synchronous bracket 221, an auxiliary synchronous lifting device 222 and an auxiliary synchronous clamping device 223. The auxiliary synchronous clamping device 223 is movably arranged on the auxiliary synchronous bracket 221; the movable end of the auxiliary synchronous lifting device 222 is connected to the auxiliary synchronous clamping device 223; the auxiliary synchronous lifting device 222 is used to drive the auxiliary synchronous clamping device 223 to approach or move away from the hanger, and the auxiliary synchronous lifting device 222 is a cylinder.

[0075] The secondary synchronous clamping device 223 includes a secondary synchronous clamping bracket 2231 and a movable secondary synchronous first clamping member 2232 and a secondary synchronous second clamping member 2233. A secondary synchronous first driving device 2234 and a secondary synchronous second driving device 2235 are provided on the secondary synchronous clamping bracket 2231. The secondary synchronous first driving device 2234 is arranged at one end of the secondary synchronous clamping bracket 2231 and connected to the secondary synchronous first clamping member 2232. The secondary synchronous second driving device 2235 is arranged at the other end of the secondary synchronous clamping bracket 2231 and connected to the secondary synchronous second clamping member 2233. The secondary synchronous first clamping member 2232 and the secondary synchronous second clamping member 2233 are close to each other for clamping the sling. The secondary synchronous first driving device 2234 and the secondary synchronous second driving device 2235 are both cylinders.

[0076] In the auxiliary synchronous clamping device 223, the auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233 are close to each other to achieve clamping of the sling; the auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233 are away from each other to achieve separation of the auxiliary synchronous clamping device 223 and the sling; since the auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233 are both movably arranged, when clamping the sling, the sling is moved between the auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233, and the auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233 can be driven to clamp the sling; in this way, when clamping the sling at multiple positions, it will not be affected by the error of the distance between the sling and the auxiliary synchronous first clamping member 2232 and the distance between the sling and the auxiliary synchronous second clamping member 2233. The auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233 which are driven independently are provided, and the reliability is good.

[0077] The secondary synchronous second clamping member 2233 includes a base 2236 and a swinging member 2237, and one end of the swinging member 2237 away from the first clamping member is hinged on the base 2236. A spring 2238 is also connected between the swinging member 2237 and the base 2236, and the swinging member 2237 is reset by the spring 2238. When the sling cooperates with the secondary synchronous clamping device 223, the secondary synchronous clamping device 223 is first driven to rise by the secondary synchronous lifting device 222. Then the sling is driven to approach the secondary synchronous clamping device 223. When the sling contacts the swinging member 2237, the swinging member 2237 is driven to swing down by overcoming the elastic force of the spring 2238, and then the sling is continued to be moved so that the clamping area of ​​the sling is located between the first clamping member and the second clamping member. The swinging member is reset under the elastic force of the spring 2238. Then the first clamping member and the second clamping member are driven to approach each other to clamp the sling.

[0078] In a preferred embodiment, a liftable walking mechanism 5 is also provided on the chassis 1; the walking mechanism 5 includes a walking bracket 51, a walking lifting drive 52 and a walking device 53; the walking bracket 51 is arranged on the chassis 1, and the walking device 53 is movably arranged on the walking bracket 51; the fixed end of the walking lifting drive 52 is arranged on the walking bracket 51, and the movable end of the walking lifting drive 52 is connected to the walking device 53; the walking device 53 includes a motor 531 and a walking wheel 532.

[0079] When the chassis 1 moves following the sling, the travel lifting drive 52 raises the travel device 53 so that the travel wheels 532 of the travel device 53 are not in contact with the ground; after the brake disc is tightened, the travel lifting drive 52 lowers the travel device 53 so that the travel wheels 532 of the travel device 53 are in contact with the ground; then the motor 531 drives the travel wheels 532 to move and drive the chassis 1 to move, thereby realizing the reset of the chassis 1.

[0080] A working method of a new energy vehicle chassis tightening production line comprises the following steps:

[0081] S1 , driving the main synchronous device 21 and the auxiliary synchronous device 22 to rise, and moving the area to be clamped of the lifting device into the main synchronous device 21 and the auxiliary synchronous device 22 .

[0082] S2, after the main synchronization device 21 clamps one area to be clamped of the sling; the auxiliary synchronization first clamping member 2232 and the auxiliary synchronization second clamping member 2233 approach each other to clamp another area to be clamped of the sling; the synchronization mechanism 2 connects the chassis 1 and the sling, and the chassis 1 moves with the sling.

[0083] S3, preset a first position and a second position on one side of the vehicle; preset a first position and a second position on the other side of the vehicle; the first position is a corresponding position of one drive shaft; the second position is a corresponding position of another drive shaft.

[0084] S4, the moving device 31 drives the tightening device 33 to move along the three-axis direction to align with the driving axis corresponding to the first position.

[0085] S5. The camera device 3331 determines the bolt position of the current wheel hub bearing; the rotating device 332 drives the tightening device 33 to rotate so that the slot 3345 is aligned with the bolt of the current wheel hub bearing.

[0086] S6, the moving device 31 drives the tightening device 33 to continue to approach the brake disc; when the tightening base plate fits with the wall surface of the current brake disc and the bolt of the current wheel hub bearing is located in the slot 3345, S7 is performed.

[0087] S7, the brake disc tightening gun 331 tightens the locking nut of the brake disc on the drive shaft; then proceed to S8.

[0088] S8. The moving device 31 drives the tightening device 33 along the three-axis direction to align with the driving axis corresponding to the second position.

[0089] S9, the camera device 3331 determines the bolt position of the current wheel hub bearing; the rotating device 332 drives the tightening device 33 to rotate, so that the slot 3345 is aligned with the bolt of the current wheel hub bearing.

[0090] S10, the moving device 31 drives the tightening device 33 to continue to approach the brake disc; when the tightening base plate is in contact with the wall surface of the current brake disc and the bolt of the current wheel hub bearing is located in the slot 3345, S11 is performed.

[0091] S11, the brake disc tightening gun 331 tightens the locking nut of the brake disc on the drive shaft; then proceeds to S12.

[0092] S12, the main synchronizer 21 and the auxiliary synchronizer 22 are separated from the sling; the chassis 1 is reset.

[0093] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0094] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0095] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A new energy vehicle chassis tightening production line, characterized by: It includes a chassis, a synchronization mechanism arranged on the chassis, a brake disc tightening device, and a front and rear suspension tightening device; the synchronization mechanism includes a secondary synchronization device, the secondary synchronization device includes a secondary synchronization jacking device and a secondary synchronization clamping device, the secondary synchronization jacking device is used to drive the secondary synchronization clamping device to approach or move away from the sling, the secondary synchronization clamping device includes a movably arranged secondary synchronization first clamping member and a secondary synchronization second clamping member, the secondary synchronization first clamping member and the secondary synchronization second clamping member are close to each other for clamping the sling, and the secondary synchronization device drives the chassis to move with the sling; The brake disc tightening device comprises a moving device and a tightening device, wherein the moving device is used to drive the tightening device to move along the length direction, width direction and height direction of the chassis; the tightening device comprises a tightening device, wherein the tightening device comprises a brake disc tightening gun, a rotating device and a tightening limit device, wherein the tightening limit device is arranged on the rotating device, and a through opening is arranged on the rotating device and the tightening limit device, and the brake disc tightening gun is arranged in the opening; the tightening limit device comprises a tightening base plate, wherein a slot is arranged on the tightening base plate, and the rotating device is used to drive the slot on the tightening limit device to rotate, and the slot is used to clamp the bolt of the wheel hub bearing to limit the rotation of the drive shaft, and the brake disc tightening gun is used to tighten the locking nut of the brake disc on the drive shaft; The front and rear suspension tightening equipment includes front and rear suspension tightening drives, to which a universal sleeve is connected; the universal sleeve includes a sleeve fixed end and a sleeve movable end; the sleeve movable end is arranged on the sleeve fixed end through a universal bearing, and a sleeve spring is arranged on the sleeve fixed end, and one end of the sleeve spring abuts against the sleeve movable end.

2. The new energy vehicle chassis tightening production line according to claim 1 is characterized by: The tightening limit device also includes a tightening floating connector, which is connected to the tightening base plate via a self-aligning bearing; a reset spring is also provided on the tightening connector, one end of which abuts against the tightening base plate; a rotation limit assembly is also provided between the tightening floating connector and the tightening base plate, and the rotation limit assembly is used to limit the rotation of the tightening base plate relative to the tightening floating connector.

3. The new energy vehicle chassis tightening production line according to claim 2 is characterized in that: The rotation limiting assembly is a chimeric structure arranged on the opposite wall surfaces of the tightening floating connector and the tightening base plate.

4. The new energy vehicle chassis tightening production line according to claim 1 is characterized in that: The tightening device also includes a floating device, which includes a longitudinal floating component and a transverse floating component; the tightening device is arranged on the transverse floating component, the longitudinal floating component is arranged on the moving device and is connected to the transverse floating component, and the floating device is used to offset the reaction force of the nut on the tightening device along the height direction and length direction of the tightening device.

5. The new energy vehicle chassis tightening production line according to claim 4 is characterized in that: The longitudinal floating component includes a longitudinal floating bracket, at both ends of the longitudinal floating bracket in the height direction, longitudinal limit plates are provided, and a longitudinal floating guide column is provided between the two longitudinal limit plates; a longitudinal first spring, a longitudinal second spring and a longitudinal floating block are passed through the longitudinal floating guide column; the longitudinal floating block is located between the longitudinal first spring and the longitudinal second spring, and the transverse floating component is connected to the longitudinal floating block.

6. The new energy vehicle chassis tightening production line according to claim 5 is characterized by: The transverse floating assembly includes a transverse floating bracket; the transverse floating bracket is connected to the longitudinal floating block; transverse limit plates are provided at both ends of the transverse floating bracket in the horizontal direction, and a transverse floating guide column is provided between the transverse and longitudinal limit plates; a transverse first spring, a transverse second spring and a transverse floating block are passed through the transverse floating guide column; the transverse floating block is located between the transverse first spring and the transverse second spring, and the tightening device is connected to the transverse floating block.

7. The new energy vehicle chassis tightening production line according to claim 1 is characterized by: The auxiliary synchronous clamping device also includes an auxiliary synchronous clamping bracket, an auxiliary synchronous first drive device and an auxiliary synchronous second drive device arranged on the auxiliary synchronous clamping bracket, the auxiliary synchronous first drive device is arranged at one end of the auxiliary synchronous clamping bracket and connected to the auxiliary synchronous first clamping member, and the auxiliary synchronous second drive device is arranged at the other end of the auxiliary synchronous clamping bracket and connected to the auxiliary synchronous second clamping member.

8. The new energy vehicle chassis tightening production line according to claim 7 is characterized by: The secondary synchronous second clamping member comprises a base and a swinging member, one end of the swinging member away from the first clamping member is hinged on the base, and a spring is connected between the swinging member and the base.

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