New energy vehicle chassis tensioning production line

Abstract

The application provides a new energy automobile chassis tensioning production line, which comprises a chassis, a synchronous mechanism arranged on the chassis and a brake disc tensioning device, wherein the synchronous mechanism comprises a secondary synchronous device, and a secondary synchronous first clamping piece and a secondary synchronous second clamping piece of the secondary synchronous device are close to each other to clamp a lifting tool; when the lifting tool is clamped at multiple positions, the lifting tool is not affected by the distance error between the lifting tool and the secondary synchronous first clamping piece and the distance error between the lifting tool and the secondary synchronous second clamping piece; when the brake disc tensioning device is used to tighten the nut corresponding to the brake disc, the rotation of the driving shaft is limited, the nut is tightened, and the nut is tightened on the driving shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile chassis processing, in particular to a new energy automobile chassis tensioning production line. BACKGROUND

[0002] In vehicle production and processing, the chassis high-torque bolts need to be tensioned. The industry usually uses the following two methods for bolt tensioning: This process is performed manually, usually by suspending the vehicle at a specified location and then operating the tightening tool by the staff to tension the bolt. This process not only consumes a lot of manpower, but also delays the vehicle from moving to the next station for processing because the vehicle needs to stay in one position for a long time. After tensioning is completed, the vehicle moves to the next station, thereby reducing the production efficiency of the vehicle. Another way is to add a carrier vehicle that moves synchronously with the vehicle, and an automatic tensioning mechanism is added to the carrier vehicle to automatically tension the chassis bolts.

[0003] As disclosed in the patent document with Chinese application number 202310461446.3, published on July 28, 2023, a vehicle chassis tensioning device, method and computer readable storage medium, which discloses tensioning the vehicle chassis bolts; but this device is not suitable for tensioning the brake disc on the drive shaft; because the drive shaft is movably arranged, the brake disc is arranged on the hub bearing connected to the drive shaft, and when the tensioning mechanism is used to act directly on the nut of the brake disc, the drive shaft will also rotate with the nut, which will result in the brake disc being unable to be tensioned.

[0004] At the same time, the device connects the carrier vehicle and the lifting tool through the synchronization mechanism. If multiple synchronization mechanisms are provided, the distance between the clamping position of the lifting tool and one synchronization mechanism, and the distance between the other clamping position of the lifting tool and the other synchronization mechanism cannot be guaranteed to be completely consistent, and will be affected by errors.

[0005] Referring to Figure 1 As shown, the synchronization mechanism is used to clamp the lifting tool C by the second clamping piece Z2 approaching the first clamping piece Z1. When the clamping position of the lifting tool C contacts one of the first clamping pieces Z1, there is a gap V between the other clamping position of the lifting tool and the other first clamping piece X1, which will cause the other second clamping piece X2 to be unable to clamp the lifting tool when it approaches the other first clamping piece X1. This will also cause the clamping between the lifting tool and the carrier vehicle to be unstable.

[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 tension the bolt, and the tensioning effect of the bolt is poor when the sleeve cannot complete the fit with the bolt. SUMMARY

[0007] In view of this, the purpose of the present application is to provide a new energy automobile chassis tightening production line, through the mutual approach of the auxiliary synchronization first clamping part and the auxiliary synchronization second clamping part, the clamping of the lifting appliance is not affected by the distance error between the lifting appliance and the auxiliary synchronization first clamping part and the distance error between the lifting appliance and the auxiliary synchronization second clamping part, through the brake disc tightening device, when tightening the nut corresponding to the brake disc, the rotation of the drive shaft is limited and the nut is tightened, thereby realizing the tightening of the nut on the drive shaft; through the cooperation of the universal sleeve of the front and rear suspension tightening device and the bolts with different placement angles, the fitting effect between the movable end of the sleeve and the front and rear suspension bolts of the vehicle is ensured, and the rated tightening effect of the front and rear suspension bolts is improved.

[0008] In order to solve the above technical problems, the technical scheme used by the present application is:

[0009] The new energy automobile chassis tightening production line comprises a chassis, a synchronous mechanism arranged on the chassis, a brake disc tightening device and a front and rear suspension tightening device; the synchronous mechanism comprises an auxiliary synchronization device, the auxiliary synchronization device comprises an auxiliary synchronization jacking device and an auxiliary synchronization clamping device, the auxiliary synchronization jacking device is used for driving the auxiliary synchronization clamping device to approach or move away from the lifting appliance, the auxiliary synchronization clamping device comprises an auxiliary synchronization first clamping part and an auxiliary synchronization second clamping part arranged movably, the auxiliary synchronization first clamping part and the auxiliary synchronization second clamping part approach each other to clamp the lifting appliance, and the auxiliary synchronization device drives the chassis to move along with the lifting appliance.

[0010] The brake disc tightening device comprises a moving device and a tightening device, the moving device is used for driving the tightening device to move along the length direction, the width direction and the height direction of the chassis; the tightening device comprises a tightening device, the tightening device comprises a brake disc tightening gun, a rotating device and a tightening limiting device, the tightening limiting device is arranged on the rotating device, through holes are arranged on the rotating device and the tightening limiting device, and the brake disc tightening gun is arranged in the through hole; the tightening limiting device comprises a tightening bottom plate, a clamping groove is arranged on the tightening bottom plate, the rotating device is used for driving the clamping groove on the tightening limiting device to rotate, the clamping groove is used for clamping the bolt of the hub bearing to limit the rotation of the drive shaft, and the brake disc tightening gun is used for tightening the locking nut of the brake disc on the drive shaft.

[0011] The front and rear suspension tightening device comprises a front and rear suspension tightening drive, and a universal sleeve is connected to the front and rear suspension tightening drive; the universal sleeve comprises a sleeve fixed end and a sleeve movable end; the sleeve movable end is arranged on the sleeve fixed end through a universal bearing, 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 limiting device further comprises a tightening floating connector, the tightening floating connector is connected with the tightening bottom plate through a self-aligning bearing; a reset spring is further arranged on the tightening connector, one end of the reset spring is in abutment with the tightening bottom plate; a rotation limiting assembly is further arranged between the tightening floating connector and the tightening bottom plate, the rotation limiting assembly is used for limiting the rotation of the tightening bottom plate relative to the tightening floating connector.

[0013] Preferably, the rotation limiting assembly is an embedded structure arranged on the opposite wall surfaces of the tightening floating connector and the tightening bottom plate.

[0014] Preferably, the tightening device further comprises a floating device, the floating device comprises a longitudinal floating assembly and a transverse floating assembly; the tightening device is arranged on the transverse floating assembly, the longitudinal floating assembly is arranged on the moving device and connected with the transverse floating assembly, and the floating device is used for offsetting the reaction force of the nut on the tightening device in the height direction and the length direction of the tightening device.

[0015] Preferably, the longitudinal floating assembly comprises a longitudinal floating support, longitudinal limiting plates are arranged at both ends of the longitudinal floating support in the height direction, and a longitudinal floating guide column is arranged between the two longitudinal limiting plates; a longitudinal first spring, a longitudinal second spring and a longitudinal floating block are arranged on 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 with the longitudinal floating block.

[0016] Preferably, the transverse floating assembly comprises a transverse floating support; the transverse floating support is connected with the longitudinal floating block; transverse limiting plates are arranged at both ends of the transverse floating support in the horizontal direction, and a transverse floating guide column is arranged between the transverse limiting plates; a transverse first spring, a transverse second spring and a transverse floating block are arranged on 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 with the transverse floating block.

[0017] Preferably, the auxiliary synchronous clamping device further comprises an auxiliary synchronous clamping support, an auxiliary synchronous first driving device and an auxiliary synchronous second driving device arranged on the auxiliary synchronous clamping support, the auxiliary synchronous first driving device is arranged at one end of the auxiliary synchronous clamping support and connected with the auxiliary synchronous first clamping piece, and the auxiliary synchronous second driving device is arranged at the other end of the auxiliary synchronous clamping support and connected with the auxiliary synchronous second clamping piece.

[0018] Preferably, the auxiliary synchronous second clamping piece comprises a base and a swing piece, one end of the swing piece away from the first clamping piece is hinged to the base, and a spring is further connected between the swing piece and the base,

[0019] The beneficial effects of the new energy automobile chassis tightening production line according to the present application mainly include:

[0020] In the sub-synchronous clamping device, the sub-synchronous first clamping member and the sub-synchronous second clamping member are close to each other to clamp the lifting appliance; the sub-synchronous first clamping member and the sub-synchronous second clamping member are away from each other to separate the sub-synchronous clamping device from the lifting appliance; since the sub-synchronous first clamping member and the sub-synchronous second clamping member are movably arranged, when the lifting appliance is clamped, the lifting appliance is moved between the sub-synchronous first clamping member and the sub-synchronous second clamping member, so that the sub-synchronous first clamping member and the sub-synchronous second clamping member can clamp the lifting appliance; thus, when the lifting appliance is clamped at multiple positions, the error influence of the distance between the lifting appliance and the sub-synchronous first clamping member and the distance between the lifting appliance and the sub-synchronous second clamping member can be avoided.

[0021] The brake disc tightening device is used for tightening the brake disc, and the driving shaft tightening machine is provided with a moving device for driving the tightening device to move along the three-axis direction, so as to realize the position alignment of the tightening device and the driving shaft, and a rotating device for driving the tightening device to rotate, so that the clamping groove is positioned corresponding to the bolt of the hub bearing, and the clamping groove is driven to move close to the bolt of the hub bearing under the action of the moving device and clamps the bolt of the hub bearing, the clamping groove limits the movement of the bolt of the hub bearing, so as to limit the rotation of the driving shaft; when the corresponding nut of the brake disc is tightened, the driving shaft is limited to rotate by the tightening limiting device, the nut is tightened by the brake disc tightening gun, and then the tightening of the nut on the driving shaft is realized.

[0022] Meanwhile, the universal sleeve is arranged in the front and rear suspension tightening device; the bolt of the front and rear suspension of the vehicle is tightened through the universal sleeve; the universal bearing is arranged to enable the movable end of the sleeve to 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 bolt of the front and rear suspension of the vehicle, the movable end of the sleeve can cooperate with the bolt placed at different angles, so as to ensure the fitting effect between the movable end of the sleeve and the bolt of the front and rear suspension of the vehicle; meanwhile, the sleeve spring is arranged for the reset of the movable end of the sleeve, so as to facilitate the cooperation of the movable end of the sleeve with another bolt. The tightening bottom plate is supported by the tightening floating connecting piece, and the aligning bearing is arranged to enable the tightening bottom plate to swing along the axial direction of the opening; thus, the tightening bottom plate can swing under the action of external force, and when the tightening bottom plate contacts the brake disc, the tightening bottom plate can fit the wall surface of the brake disc in different states, so as to ensure the fitting effect between the tightening bottom plate and the brake disc. Meanwhile, the reset spring is arranged for the reset of the tightening bottom plate, and when the tightening bottom plate is separated from the brake disc, the tightening bottom plate is driven to reset under the elastic force of the reset spring itself, and then the aligning bearing is reset, so as to facilitate the cooperation of the tightening bottom plate with another brake disc.

[0023] The rotating limiting assembly is arranged to limit the movement of the tightening bottom plate, so as to avoid the reverse force of the bolt of the hub bearing on the clamping groove from driving the tightening bottom plate to rotate relative to the tightening floating connecting piece, and avoid the rotation of the driving shaft to tighten the brake disc.

[0024] The reaction force generated by the tightening brake disc is offset by the floating device, so that the reaction force generated by the tightening brake disc does not act on the tightening device, and the service life of the tightening device is prolonged.

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

[0026] In the transverse floating assembly, the left reaction force is buffered by the transverse first spring, and the right reaction force is buffered by the transverse second spring, so that the reaction force is buffered in the left-right direction along the transverse direction.

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

[0028] The auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member are close to each other to clamp the lifting device, and when the lifting device is clamped at multiple positions, the error caused by the distance between the lifting device and the auxiliary synchronous first clamping member and the distance between the lifting device and the auxiliary synchronous second clamping member is not affected, and when the brake disc is tightened by the brake disc tightening device, the rotation of the driving shaft is limited and the nut is tightened, thereby realizing the tightening of the nut on the driving shaft. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The embodiments of the present application, illustrated in the drawings, are not intended to be limiting as to the scope of the application, as its scope is defined by the claims. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the application pertains. It will be further understood that the drawings are not necessarily to scale, the emphasis, instead, being placed upon illustrating the principles of the application.

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

[0031] Figure 2 It is a perspective view of the present application.

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

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

[0034] Figure 5 It is a perspective view of the brake disc tightening device in the present application.

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

[0036] Figure 7 Figure 8 is an exploded view of the floating device of the present application.

[0037] Figure 8 Figure 9 is a sectional view of the tightening device of the present application.

[0038] Figure 9 Figure 10 is a perspective view of the tightening limiting device of the present application.

[0039] Figure 10 Figure 11 is an exploded view of the tightening limiting device of the present application.

[0040] Figure 11 Figure 12 is a schematic view of the brake disc mounted on the hub bearing.

[0041] Figure 12 Figure 13 is a perspective view of the main synchronization device of the present application.

[0042] Figure 13 Figure 14 is a perspective view of the auxiliary synchronization device of the present application.

[0043] Figure 14 Figure 15 is a sectional view of the auxiliary synchronization device of the present application. Figure 13 Figure 16 is an enlarged view of A in Figure 15.

[0044] Figure 15 Figure 17 is a schematic view of the rear suspension mechanical arm, the rear suspension tightening gun and the universal sleeve connection of the present application. Figure 16 Figure 18 is a schematic view of the front suspension mechanical arm, the front suspension tightening gun and the universal sleeve connection of the present application.

[0045] Figure 17 Figure 19 is a perspective view of the universal sleeve of the present application.

[0046] Figure 18 Figure 20 is a schematic view of the walking mechanism of the present application.

[0047] Chassis 1, synchronous mechanism 2, brake disc tightening device 3, front and rear suspension tightening device 4, walking mechanism 5, wheel hub bearing bolt 6, brake disc 7, main synchronous device 21, auxiliary synchronous 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 support 51, walking lifting drive 52, walking device 53, auxiliary synchronous support 221, auxiliary synchronous jacking device 222, auxiliary synchronous clamping device 223, longitudinal moving mechanism 311, transverse moving mechanism 312, lifting mechanism 313, brake disc tightening gun 331, rotating device 332, tightening support 333, tightening limiting device 334, longitudinal floating assembly 341, transverse floating assembly 342, sleeve fixed end 451, sleeve movable end 452, universal bearing 453, sleeve spring 454, motor 531, walking wheel 532, auxiliary synchronous clamping support 2231, auxiliary synchronous first clamping piece 2232, auxiliary synchronous second clamping piece 2233, auxiliary synchronous first driving device 2234, auxiliary synchronous second driving device 2235, base 2236, swinging piece 2237, spring 2238, camera device 3331, second zero adjustment hole 3332, tightening connecting plate 3341, tightening bottom plate 3342, tightening floating connecting piece 3343, bolt limiting block 3344, clamping groove 3345, aligning bearing 3346, reset spring 3347, rotation limiting assembly 3348, longitudinal floating support 3411, longitudinal limiting plate 3412, longitudinal first spring 3413, longitudinal second spring 3414, longitudinal floating block 3415, first detection part 3416, transverse floating support 3421, transverse limiting plate 3422, transverse first spring 3423, transverse second spring 3424, transverse floating block 3425, second detection part 3426, first zero adjustment hole 33411, tightening first limiting piece 33481, tightening second limiting piece 33482, tightening limiting cavity 33483. DETAILED DESCRIPTION

[0048] The technical scheme of the present application will be described in further detail below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. However, the embodiments are not intended to limit the present application. In the embodiments, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] It is to be understood that when a component is referred to as being "connected" to another component, it can be directly connected to the other component, or intervening components can be present. The terms "mounted", "one end", "the other end", and the like, as used herein, are intended to be illustrative only and are not intended to be limiting.

[0050] The embodiment provides a new energy automobile chassis tightening production line, as shown in the drawings. Figures 2-18 The new energy automobile chassis tightening production line comprises a chassis 1, a synchronous mechanism 2 arranged on the chassis 1, a brake disc tightening device 3 and a front and rear suspension tightening device 4. The synchronous mechanism 2 is used for clamping a lifting appliance and driving the chassis 1 to move along with the lifting appliance. The brake disc tightening device 3 is used for tightening a brake disc. The front and rear suspension tightening device 4 is used for tightening bolts of front and rear suspensions of the vehicle.

[0051] The brake disc tightening device 3 comprises a moving device 31 and a tightening device 32. The moving device 31 is used for driving the tightening device 32 to move along the length direction, the width direction and the height direction of the chassis 1. The tightening device 32 comprises a tightening device 33. The tightening device 33 comprises a brake disc tightening gun 331, a rotating device 332, a tightening support 333 and a tightening limiting device 334. The tightening support 333 is hollow. The rotating device 332 is arranged on one side of the tightening support 333. The output end of the rotating device 332 penetrates through the tightening support 333. The tightening limiting device 334 is arranged on the rotating device 332. The rotating device 332 and the tightening limiting device 334 are provided with through holes. The brake disc tightening gun 331 penetrates through the through holes.

[0052] In a preferred embodiment, two brake disc tightening devices 3 are arranged, and the two brake disc tightening devices 3 are respectively used for tightening nuts corresponding to brake discs on two sides of the vehicle.

[0053] The tightening limiting device 334 comprises a tightening connecting plate 3341, a tightening bottom plate 3342 and a tightening floating connecting piece 3343. The tightening floating connecting piece 3343 is arranged on one side of the tightening connecting plate 3341. The tightening bottom plate 3342 is arranged on one side of the tightening floating connecting piece 3343. The tightening connecting plate 3341 is connected with the rotating device 332. Two or more bolt limiting blocks 3344 are protruded on one side of the tightening bottom plate 3342, away from the tightening floating connecting piece 3343. A clamping groove 3345 is formed between adjacent bolt limiting blocks 3344. The rotating device 332 is used for driving the clamping groove 3345 on the tightening limiting device 334 to rotate. The clamping groove 3345 is used for clamping the bolt 6 of the hub bearing to limit the rotation of the driving shaft. The brake disc tightening gun 331 is used for tightening the locking nut of the brake disc 7 on the driving shaft.

[0054] In a preferred embodiment, the clamping grooves 3345 are arranged in multiple numbers, so that each bolt of the hub bearing is clamped; the stability of the rotation of the driving shaft is improved; the adjacent bolt limiting blocks 3344 are distributed along the circumference of the tightening base plate 3342, and are arranged at intervals between the adjacent bolt limiting blocks 3344; specifically, the bolt limiting blocks 3344 are provided in five numbers, and five clamping grooves 3345 are formed between the adjacent bolt limiting blocks 3344, respectively.

[0055] The tightening support 333 is provided with a camera 3331, which is used to identify the position of the bolt of the hub bearing; in a preferred embodiment, the camera 3331 is a camera, and after the position of the bolt of the hub bearing is identified by the camera 3331, the rotating device 332 drives the tightening limiting device 334 to rotate, so that the clamping grooves 3345 are aligned with the bolt of the hub bearing. The moving device 31 is arranged to drive the tightening device 32 to move along the three-axis direction, so as to realize the alignment of the tightening device 32 with the position of the driving shaft; the rotating device 332 is arranged to drive the tightening device 32 to rotate, so that the clamping grooves 3345 correspond to the position of the bolt of the hub bearing; at the same time, under the action of the moving device 31, the clamping grooves 3345 are driven to move close to the bolt of the hub bearing, and the bolt of the hub bearing is clamped; the clamping grooves 3345 limit the movement of the bolt of the hub bearing, so as to limit the rotation of the driving shaft; when the nut corresponding to the brake disc is tightened, the driving shaft is limited to rotate by the tightening limiting device 334, the nut is tightened by the brake disc tightening gun 331, and then the tightening of the nut on the driving shaft is realized.

[0056] In a preferred embodiment, the tightening floating connecting piece 3343 and the tightening base plate 3342 are connected through the self-aligning bearing 3346; the reset spring 3347 is further arranged on the tightening connecting piece, 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 connecting piece 3343, and the self-aligning bearing 3346 is arranged to enable the tightening base plate 3342 to 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 be attached to the wall surface of the brake disc in different states, so as to ensure the attachment effect between the tightening base plate 3342 and the brake disc. At the same time, the reset spring 3347 is arranged for the reset of the tightening base plate 3342, and after the tightening base plate 3342 is separated from the brake disc, the tightening base plate 3342 is driven to reset under the elastic force of the reset spring 3347 itself, so as to reset the self-aligning bearing 3346, thereby facilitating the cooperation of the tightening base plate 3342 with another brake disc.

[0057] A rotation limiting assembly 3348 is further arranged between the floating connecting piece 3343 and the tightening bottom plate 3342, and is used to limit the rotation of the tightening bottom plate 3342 relative to the floating connecting piece 3343. By arranging the rotation limiting assembly 3348 to limit the movement of the tightening bottom plate 3342, the reaction force of the bolts of the hub bearing on the clamping groove 3345 is avoided to drive the tightening bottom plate 3342 to rotate relative to the floating connecting piece 3343, and the driving shaft is avoided to rotate and fail to tighten the brake disc.

[0058] The rotation limiting assembly 3348 includes a first limiting piece 33481 and two or more second limiting pieces 33482. The second limiting pieces 33482 are arranged outwardly from the surface of the floating connecting piece 3343. A limiting cavity 33483 is formed between two adjacent second limiting pieces 33482. The first limiting piece 33481 is arranged outwardly from the surface of the tightening bottom plate 3342 towards the floating connecting piece 3343. The first limiting piece 33481 extends into the limiting cavity 33483. The two second limiting pieces 33482 abut against the first limiting piece 33481 to limit the rotation of the first limiting piece 33481 in the clockwise and counterclockwise directions, respectively, and further limit the rotation of the tightening bottom plate 3342 relative to the floating connecting piece 3343.

[0059] In a preferred embodiment, a first zero adjustment hole 33411 is arranged on the connecting plate 3341, and a second zero adjustment hole 3332 is arranged on the support 333. The first zero adjustment hole 33411 and the second zero adjustment hole 3332 are arranged along the axial direction of the holes, and the zero point of the rotation device 332 is located at the abutting position of the first zero adjustment hole 33411 and the second zero adjustment hole 3332. The first zero adjustment hole 33411 and the second zero adjustment hole 3332 are used to provide a reference position for the rotation of the tightening limiting device 334.

[0060] The tightening device 32 further includes a floating device 34, which includes a longitudinal floating assembly 341 and a transverse floating assembly 342. The tightening device 33 is arranged on the transverse floating assembly 342, and the longitudinal floating assembly 341 is arranged on the moving device 31 and connected to the transverse floating assembly 342. The floating device 34 is used to offset the reaction force of the nut on the tightening device 33 in the height direction and the length direction of the tightening device 33. The floating device 34 is arranged to offset the reaction force generated by the tightening brake disc, so as to avoid the reaction force generated by the tightening brake disc acting on the tightening device 33, and prolong the service life of the tightening device 33. The longitudinal floating assembly 341 and the transverse floating assembly 342 are arranged respectively to buffer the reaction force in different directions, and improve the offset effect of the reaction force.

[0061] The longitudinal floating assembly 341 comprises a longitudinal floating support 3411, longitudinal limiting plates 3412 are respectively arranged at both ends of the longitudinal floating support 3411 in the height direction, and a longitudinal floating guide column is arranged between the two longitudinal limiting plates 3412; a longitudinal first spring 3413, a longitudinal second spring 3414 and a longitudinal floating block 3415 are arranged on 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 with 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 upward and downward directions along the longitudinal direction. Meanwhile, the diameter of the longitudinal second spring 3414 is greater than that of the longitudinal first spring 3413, and the load of the longitudinal second spring 3414 is greater than that of the longitudinal first spring 3413; the gravity of the transverse floating assembly 342 and the tightening device 33 acts on the longitudinal second spring 3414 through the longitudinal floating block 3415, and the longitudinal second spring 3414 with a larger diameter can better bear the weight of the transverse floating assembly 342 and the tightening device 33, thereby improving the supporting effect on the transverse floating assembly 342 and the tightening device 33.

[0062] The transverse floating assembly 342 comprises a transverse floating support 3421; the transverse floating support 3421 is connected with the longitudinal floating block 3415; transverse limiting plates 3422 are respectively arranged at both ends of the transverse floating support 3421 in the horizontal direction, and a transverse floating guide column is arranged between the two transverse limiting plates 3422; a transverse first spring 3423, a transverse second spring 3424 and a transverse floating block 3425 are arranged on 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 with the transverse floating block 3425. In the transverse floating assembly 342, the left reaction force is buffered by the transverse first spring 3423, the right reaction force is buffered by the transverse second spring 3424, and the reaction force is buffered in the left and right directions along the transverse direction.

[0063] In a preferred embodiment, a sliding rail and a sliding block are arranged between the transverse floating support 3421 and the longitudinal floating support 3411 to guide the longitudinal movement of the transverse floating support 3421; and a sliding rail and a sliding block are arranged between the tightening support 333 of the tightening device 33 and the transverse floating support 3421 to guide the transverse movement of the tightening device 33.

[0064] In a preferred embodiment, the longitudinal second spring 3414 is arranged below the longitudinal first spring 3413, and the elastic force of the longitudinal second spring 3414 is greater than that of the longitudinal first spring 3413.

[0065] The first detection part 3416 is arranged on the longitudinal floating support 3411, and the second detection part 3426 is arranged on the transverse floating support 3421. The first detection part 3416 and the second detection part 3426 are arranged along the height direction of the longitudinal floating support 3411, and the second detection part 3426 is arranged 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 the embodiment, the first detection part 3416 and the second detection part 3426 are in-situ holes. The fatigue degree of the longitudinal first spring 3413 and the longitudinal second spring 3414 is detected by detecting the position change of the centers of the two in-situ holes.

[0066] In a preferred embodiment, the fatigue degree of the longitudinal first spring 3413 and the longitudinal second spring 3414 is detected by inserting a pin through the first detection part 3416 and the second detection part 3426. If the pin can horizontally pass through the two in-situ holes, the fatigue degree of the longitudinal first spring 3413 and the longitudinal second spring 3414 is within the normal range. If the pin cannot horizontally pass through the two in-situ holes, the first detection part 3416 and the second detection part 3426 are dislocated. The longitudinal first spring 3413 and the longitudinal second spring 3414 are fatigue failure.

[0067] 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 moved along the length direction of the chassis 1 by the transverse moving mechanism 312, as shown in Figure 5 , the transverse moving mechanism 312 moves the tightening device 32 along the X direction. The tightening device 32 is moved along the width direction of the chassis 1 by the longitudinal moving mechanism 311, as shown in Figure 5 , the longitudinal moving mechanism 311 moves the tightening device 32 along the Y direction. The tightening device 32 is moved along the height direction of the chassis 1 by the lifting mechanism 313, as shown in Figure 5 , the lifting mechanism 313 moves the tightening device 32 along the Z direction.

[0068] The longitudinal moving mechanism 311, the transverse moving mechanism 312, and the lifting mechanism 313 are linear driving devices such as air cylinders, hydraulic drives, or rack and pinion drives; the linear driving devices are prior art and will not be described in detail here.

[0069] The front and rear suspension tightening device 4 comprises 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 comprises a front suspension tightening gun 43 and a rear suspension tightening gun 44, the front suspension tightening gun 43 is connected with the front suspension mechanical arm 41, and the rear suspension tightening gun 44 is connected with 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; a camera 40 is arranged on the front suspension tightening gun 43 and the rear suspension tightening gun 44, and the bolt is identified through the camera 40 to determine the position of the bolt.

[0070] The front suspension tightening gun 43 and the rear suspension tightening gun 44 are respectively connected with a universal sleeve 45; the universal sleeve 45 comprises a sleeve fixed end 451 and a sleeve movable end 452; the sleeve fixed end 451 is connected with 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, 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 prior art and will not be described in detail here.

[0071] The universal sleeve 45 is arranged in the front and rear suspension tightening device 4; the bolt of the front and rear suspension of the vehicle is tightened through the universal sleeve 45; the universal bearing 453 is arranged 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 an external force, and when the sleeve movable end 452 contacts the bolt of the front and rear suspension of the vehicle wheel, the sleeve movable end 452 can cooperate with the bolt placed at different angles, thereby ensuring the fitting effect between the sleeve movable end 452 and the bolt of the front and rear suspension of the vehicle; the sleeve movable end 452 can be completely sleeved on the bolt of the front and rear suspension of the vehicle; and the sleeve spring 454 is arranged for resetting the sleeve movable end 452, thereby facilitating cooperation of the sleeve movable end 452 with another bolt.

[0072] The synchronization mechanism 2 comprises a main synchronization device 21 and an auxiliary synchronization device 22; the main synchronization device 21 is arranged on one side of the chassis 1, and the auxiliary synchronization device 22 is arranged on the other side of the chassis 1; the main synchronization device 21 and the auxiliary synchronization device 22 are respectively used for clamping a spreader. The main synchronization device 21 is prior art and has been disclosed in the patent document with the application number CN202310461446.3, and will not be described in detail here.

[0073] The auxiliary synchronous device 22 comprises an auxiliary synchronous support 221, an auxiliary synchronous jacking device 222 and an auxiliary synchronous clamping device 223, the auxiliary synchronous clamping device 223 is movably arranged on the auxiliary synchronous support 221, the movable end of the auxiliary synchronous jacking device 222 is connected with the auxiliary synchronous clamping device 223, the auxiliary synchronous jacking device 222 is used for driving the auxiliary synchronous clamping device 223 to move close to or away from the lifting appliance, and the auxiliary synchronous jacking device 222 is a pneumatic cylinder,

[0074] The auxiliary synchronous clamping device 223 comprises an auxiliary synchronous clamping support 2231 and movably arranged auxiliary synchronous first and second clamping members 2232 and 2233, the auxiliary synchronous clamping support 2231 is provided with auxiliary synchronous first and second driving devices 2234 and 2235, the auxiliary synchronous first driving device 2234 is arranged at one end of the auxiliary synchronous clamping support 2231 and is connected with the auxiliary synchronous first clamping member 2232, and the auxiliary synchronous second driving device 2235 is arranged at the other end of the auxiliary synchronous clamping support 2231 and is connected with the auxiliary synchronous second clamping member 2233. The auxiliary synchronous first and second clamping members 2232 and 2233 are close to each other to clamp the lifting appliance. The auxiliary synchronous first and second driving devices 2234 and 2235 are pneumatic cylinders.

[0075] In the auxiliary synchronous clamping device 223, the auxiliary synchronous first and second clamping members 2232 and 2233 are close to each other to clamp the lifting appliance, and are away from each other to separate the auxiliary synchronous clamping device 223 from the lifting appliance. Since the auxiliary synchronous first and second clamping members 2232 and 2233 are movably arranged, the lifting appliance can be moved between the auxiliary synchronous first and second clamping members 2232 and 2233 when clamping the lifting appliance, so that the auxiliary synchronous first and second clamping members 2232 and 2233 can clamp the lifting appliance. In this way, when clamping the lifting appliance at multiple positions, the lifting appliance will not be affected by the distance between the lifting appliance and the auxiliary synchronous first clamping member 2232 and the distance between the lifting appliance and the auxiliary synchronous second clamping member 2233. The auxiliary synchronous first and second clamping members 2232 and 2233 are independently driven, and have good reliability.

[0076] The auxiliary synchronous second clamping part 2233 comprises a base 2236 and a swing part 2237, the swing part 2237 is hinged to the base 2236 at one end away from the first clamping part, and a spring 2238 is further connected between the swing part 2237 and the base 2236, the swing part 2237 is reset through the spring 2238; when the lifting appliance cooperates with the auxiliary synchronous clamping device 223, the auxiliary synchronous lifting device 222 is first driven to drive the auxiliary synchronous clamping device 223 to rise; then the lifting appliance is driven to move close to the auxiliary synchronous clamping device 223, when the lifting appliance contacts the swing part 2237, the swing part 2237 is driven to swing downward against the elastic force of the spring 2238, then the lifting appliance is continuously moved, so that the clamping area of the lifting appliance is located between the first clamping part and the second clamping part; the swing part is reset under the elastic force of the spring 2238; then the first clamping part and the second clamping part are driven to move close to each other to clamp the lifting appliance.

[0077] In a preferred embodiment, a liftable walking mechanism 5 is further arranged on the chassis 1; the walking mechanism 5 comprises a walking support 51, a walking lifting drive 52 and a walking device 53; the walking support 51 is arranged on the chassis 1, and the walking device 53 is movably arranged on the walking support 51; the fixed end of the walking lifting drive 52 is arranged on the walking support 51, and the movable end of the walking lifting drive 52 is connected with the walking device 53; the walking device 53 comprises a motor 531 and a walking wheel 532.

[0078] When the chassis 1 moves following the lifting appliance, the walking lifting drive 52 lifts the walking device 53, so that the walking wheel 532 of the walking device 53 is not in contact with the ground; after the brake disc tensioning is completed, the walking lifting drive 52 lowers the walking device 53, so that the walking wheel 532 of the walking device 53 is in contact with the ground; then the motor 531 drives the walking wheel 532 to move, thereby driving the chassis 1 to move, and further realizing the reset of the chassis 1.

[0079] A working method of a new energy automobile chassis tensioning production line, comprising the following steps:

[0080] S1, the main synchronous device 21 and the auxiliary synchronous device 22 are driven to rise, and the clamping area of the lifting appliance is moved into the main synchronous device 21 and the auxiliary synchronous device 22.

[0081] S2, after the main synchronous device 21 clamps one clamping area of the lifting appliance, the auxiliary synchronous first clamping part 2232 and the auxiliary synchronous second clamping part 2233 move close to each other to clamp another clamping area of the lifting appliance; the synchronous mechanism 2 connects the chassis 1 with the lifting appliance, and the chassis 1 moves following the lifting appliance.

[0082] S3, the first position and the second position of one side of the vehicle are preset, and the first position and the second position of the other side of the vehicle are preset; the first position is the corresponding position of one drive shaft, and the second position is the corresponding position of another drive shaft.

[0083] S4, the moving device 31 drives the tightening device 33 to move along the three-axis direction to align the drive shaft corresponding to the first position.

[0084] S5, the camera 3331 determines the bolt position of the current hub bearing; the rotating device 332 drives the tightening device 33 to rotate so that the clamping groove 3345 is aligned with the bolt of the current hub bearing.

[0085] S6, the moving device 31 drives the tightening device 33 to continue to move towards the brake disc; when the tightening bottom plate is attached to the wall of the current brake disc and the bolt of the current hub bearing is located in the clamping groove 3345, S7 is performed.

[0086] S7, the brake disc tightening gun 331 tightens the locking nut of the brake disc on the drive shaft; then S8 is performed.

[0087] S8, the moving device 31 drives the tightening device 33 to move along the three-axis direction to align the drive shaft corresponding to the second position.

[0088] S9, the camera 3331 determines the bolt position of the current hub bearing; the rotating device 332 drives the tightening device 33 to rotate so that the clamping groove 3345 is aligned with the bolt of the current hub bearing.

[0089] S10, the moving device 31 drives the tightening device 33 to continue to move towards the brake disc; when the tightening bottom plate is attached to the wall of the current brake disc and the bolt of the current hub bearing is located in the clamping groove 3345, S11 is performed.

[0090] S11, the brake disc tightening gun 331 tightens the locking nut of the brake disc on the drive shaft; then S12 is performed.

[0091] S12, the main synchronization device 21 and the auxiliary synchronization device 22 are separated from the lifting appliance; the chassis 1 is reset.

[0092] In the present specification, unless explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0093] In the description of the specification, the description using the terms "preferred embodiment", "still another embodiment", "other embodiments", "specific example" or the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative expressions of the above terms are not necessarily directed to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and modify the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0094] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A new energy vehicle chassis tightening production line, characterized in that: The chassis, the synchronous mechanism arranged on the chassis, the brake disc tightening device and the front and rear suspension tightening device; the synchronous mechanism comprises a secondary synchronous device, the secondary synchronous device comprises a secondary synchronous lifting device and a secondary synchronous clamping device, the secondary synchronous lifting device is used to drive the secondary synchronous clamping device to move close to or away from the lifting appliance, the secondary synchronous clamping device comprises a secondary synchronous first clamping piece and a secondary synchronous second clamping piece arranged movably, the secondary synchronous first clamping piece and the secondary synchronous second clamping piece are used to clamp the lifting appliance when moving close to each other, and the secondary synchronous device drives the chassis to move along with the lifting appliance; The brake disc tightening device comprises a moving device and a tightening device, the moving device is used to drive the tightening device to move along the length direction, the width direction and the height direction of the chassis; the tightening device comprises a tightening device, the tightening device comprises a brake disc tightening gun, a rotating device and a tightening limiting device, the tightening limiting device is arranged on the rotating device, and the rotating device and the tightening limiting device are provided with a through hole, and the brake disc tightening gun is arranged in the through hole; the tightening limiting device comprises a tightening bottom plate, a clamping groove is arranged on the tightening bottom plate, the rotating device is used to drive the clamping groove on the tightening limiting device to rotate, the clamping groove is used to clamp the bolt of the hub bearing to limit the rotation of the driving shaft, and the brake disc tightening gun is used to tighten the locking nut of the brake disc on the driving shaft; The front and rear suspension tightening device comprises a front and rear suspension tightening drive, and a universal sleeve is connected to the front and rear suspension tightening drive; the universal sleeve comprises a sleeve fixed end and a sleeve movable end; the sleeve movable end is arranged on the sleeve fixed end through a universal bearing, 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 tensioning production line according to claim 1, characterized in that: The tightening limiting device further comprises a floating connecting piece, the floating connecting piece and the tightening bottom plate are connected through a self-aligning bearing; a reset spring is further arranged on the floating connecting piece, and one end of the reset spring abuts against the tightening bottom plate; a rotating limiting assembly is further arranged between the floating connecting piece and the tightening bottom plate, and the rotating limiting assembly is used to limit the rotation of the tightening bottom plate relative to the floating connecting piece.

3. The new energy vehicle chassis tensioning production line according to claim 2, characterized in that: The rotating limiting assembly is an embedded structure arranged on the opposite walls of the floating connecting piece and the tightening bottom plate.

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

5. The new energy vehicle chassis tensioning production line according to claim 4, characterized in that: The longitudinal floating assembly comprises a longitudinal floating support, longitudinal limiting plates are arranged at both ends of the longitudinal floating support in the height direction, and a longitudinal floating guide column is arranged between the two longitudinal limiting plates; a longitudinal first spring, a longitudinal second spring and a longitudinal floating block are arranged on the longitudinal floating guide column in penetration; the longitudinal floating block is located between the longitudinal first spring and the longitudinal second spring, and the transverse floating assembly is connected with the longitudinal floating block.

6. The new energy vehicle chassis tensioning production line according to claim 5, characterized in that: The transverse floating assembly comprises a transverse floating support; the transverse floating support is connected with the longitudinal floating block; transverse limiting plates are respectively arranged at both ends of the transverse floating support in the horizontal direction, transverse floating guide columns are arranged between the transverse limiting plates, transverse first springs, transverse second springs and the transverse floating block are arranged on the transverse floating guide columns; the transverse floating block is located between the transverse first springs and the transverse second springs, and the tightening device is connected with the transverse floating block.

7. The new energy vehicle chassis tensioning production line according to claim 1, characterized in that: The auxiliary synchronous clamping device further comprises an auxiliary synchronous clamping support, an auxiliary synchronous first driving device and an auxiliary synchronous second driving device arranged on the auxiliary synchronous clamping support, the auxiliary synchronous first driving device is arranged at one end of the auxiliary synchronous clamping support and connected with the auxiliary synchronous first clamping piece, and the auxiliary synchronous second driving device is arranged at the other end of the auxiliary synchronous clamping support and connected with the auxiliary synchronous second clamping piece.

8. The new energy vehicle chassis tensioning production line according to claim 7, characterized in that: The auxiliary synchronous second clamping piece comprises a base and a swing piece, one end of the swing piece away from the first clamping piece is hinged to the base, and a spring is further connected between the swing piece and the base.

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