New energy automobile brake disc tensioning device and vehicle production line

Abstract

The application provides a new energy automobile brake disc tightening device and a vehicle production line. 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, width direction and height direction of the chassis. The tightening device comprises a tightening device. The tightening device is used for tightening the locking nut of the brake disc on the driving shaft. When the nut corresponding to the brake disc is tightened, the nut is tightened while the rotation of the driving shaft is limited, and then the tightening of the nut on the driving shaft is realized.

Description

Technical Field

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

[0002] During 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 for tightening the bolts: This process is performed manually, usually requiring the vehicle to be suspended in a designated 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 tightening is completed, it moves to the next workstation, thereby reducing the vehicle's production efficiency; 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 with application number 202310461446.3 in China and publication date of July 28, 2023, 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 the brake disc on the drive shaft; since the drive shaft is movably arranged and the brake disc is arranged on the 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, the synchronization mechanism clamps the spreader C by moving the second clamping member Z2 closer to the first clamping member Z1. If, when one clamping position of the spreader C contacts one of the first clamping members Z1, a gap V exists between the other clamping position and the other first clamping member X1, the second clamping member X2 will not be able to clamp the spreader when it approaches the other first clamping member X1. This can also lead to an unstable clamping relationship between the spreader and the carrier. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a new energy vehicle brake disc tightening device, which restricts the rotation of the drive shaft while tightening the nut corresponding to the brake disc, thereby achieving the tightening of the nut on the drive shaft.

[0007] To solve the above technical problems, the technical scheme used by the present application is:

[0008] The new energy automobile 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, width direction and 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 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 driving shaft, and the brake disc tightening gun is used for tightening the locking nut of the brake disc on the driving shaft.

[0009] Preferably, the tightening limiting device further comprises a tightening floating connecting piece, the tightening floating connecting piece is connected with the tightening bottom plate through a self-aligning bearing; a reset spring is further arranged on the tightening connecting piece, one end of the reset spring abuts against the tightening bottom plate; a rotating limiting assembly is further arranged between the tightening floating connecting piece and the tightening bottom plate, and the rotating limiting assembly is used for limiting the rotation of the tightening bottom plate relative to the tightening floating connecting piece.

[0010] Preferably, the rotating limiting assembly is an embedded structure arranged on the opposite wall surfaces of the tightening floating connecting piece and the tightening bottom plate.

[0011] 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 along the height direction and length direction of the tightening device.

[0012] 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 in a penetrating mode; 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.

[0013] 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 in a penetrating mode; 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.

[0014] Preferably, the secondary synchronous clamping device also includes a secondary synchronous clamping bracket, a secondary synchronous first drive device and a secondary synchronous second drive device arranged on the secondary synchronous clamping bracket, the secondary synchronous first drive device is arranged at one end of the secondary synchronous clamping bracket and connected to the secondary synchronous first clamping member, and the secondary synchronous second drive device is arranged at the other end of the secondary synchronous clamping bracket and connected to the secondary synchronous second clamping member.

[0015] The present invention also provides a vehicle production line, including a chassis and a brake disc tightening device. The brake disc tightening device is arranged on the chassis. A synchronization mechanism is also provided on the chassis. The synchronization mechanism includes a main synchronization device and a secondary synchronization device. The main synchronization device and the secondary synchronization device can be raised and lowered and are both used to clamp a sling. The main synchronization device and the secondary synchronization device drive the chassis to move with the sling.

[0016] Preferably, the auxiliary synchronous device includes an auxiliary synchronous lifting device and an auxiliary synchronous clamping device. The auxiliary synchronous lifting device is used to drive the auxiliary synchronous clamping device to move closer to or away from the sling. The auxiliary synchronous clamping device includes a movably arranged auxiliary synchronous first clamping member and an auxiliary synchronous second clamping member. The auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member are close to each other to clamp the sling. The auxiliary synchronous device drives the chassis to move with the sling.

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

[0018] Compared with the prior art, the beneficial effects of the new energy vehicle brake disc tightening device described in the present invention are mainly reflected in: the brake disc tightening device is used to tighten the brake disc, and in the drive shaft tightening machine, a moving device is provided to drive the tightening device to move along the three-axis direction, thereby realizing the position alignment of the tightening device and the drive shaft, and 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, and 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 positioned. 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.

[0019] The tightening baseplate is supported by tightening the floating connector, and a self-aligning bearing is provided to enable the tightening baseplate to swing along the axial direction of the opening. This allows the tightening baseplate to swing under the action of an external force. When the tightening baseplate contacts the brake disc, it can conform to the wall surface of the brake disc in different states, ensuring a good fit between the tightening baseplate and the brake disc. A return spring is also provided to reset the tightening baseplate. When the tightening baseplate and the brake disc are separated, the return spring's own elastic force drives the tightening baseplate back to its original position, which in turn drives the self-aligning bearing back to its original position, facilitating the tightening baseplate's mating with another brake disc.

[0020] By setting a rotation limit assembly to limit the movement of the tightening base plate, the reaction force of the wheel hub bearing bolt on the slot is prevented 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.

[0021] A floating device is provided to offset the reaction force generated by the tightening brake disc, preventing the reaction force generated by the tightening brake disc from acting on the tightening device, thereby extending the service life of the tightening device. By separately providing longitudinal and transverse floating components, the reaction forces in different directions are buffered, thereby improving the offset effect of the reaction force.

[0022] 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.

[0023] 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.

[0024] Compared with the prior art, the advantageous effects of the vehicle production line described in the present invention are mainly reflected in the following aspects: in the sub-synchronous clamping device, the sub-synchronous first clamping member and the sub-synchronous second clamping member approach each other to clamp the sling; the sub-synchronous first clamping member and the sub-synchronous second clamping member move away from each other to separate the sub-synchronous clamping device from the sling; because the sub-synchronous first clamping member and the sub-synchronous second clamping member are both movably arranged, when clamping the sling, the sling is moved between the sub-synchronous first clamping member and the sub-synchronous second clamping member, and the sub-synchronous first clamping member and the sub-synchronous second clamping member can be driven to clamp the sling; thus, when clamping the sling in multiple positions, the sling will not be affected by the error in the distance between the sling and the sub-synchronous first clamping member, or the distance between the sling and the sub-synchronous second clamping member. Simultaneously providing independently driven sub-synchronous first clamping member and sub-synchronous second clamping member improves reliability.

[0025] 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

[0026] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not drawn to scale with actual size. The emphasis is on illustrating the subject matter of the present invention.

[0027] Figure 1 This is a schematic diagram of a conventional synchronous mechanism clamping a sling.

[0028] Figure 2 It is a three-dimensional schematic diagram of the present invention.

[0029] Figure 3 It is a side view of the present invention.

[0030] Figure 4 It is a front view of the present invention.

[0031] Figure 5 It is a three-dimensional schematic diagram of the brake disc tightening device in the present invention.

[0032] Figure 6 It is a front view schematic diagram of the brake disc tightening device in the present invention.

[0033] Figure 7 This is an exploded view of the floating device of the present invention.

[0034] Figure 8 It is a hierarchical diagram of the tightening device in the present invention.

[0035] Figure 9 It is a three-dimensional schematic diagram of the tightening limit device in the present invention.

[0036] Figure 10 This is an exploded view of the tightening limit device of the present invention.

[0037] Figure 11 Schematic diagram of the brake disc installed on the wheel hub bearing.

[0038] Figure 12 It is a three-dimensional schematic diagram of the main synchronization device in the present invention.

[0039] Figure 13 It is a three-dimensional schematic diagram of the auxiliary synchronization device in the present invention.

[0040] Figure 14 for Figure 13 A magnified view of the middle panel.

[0041] Figure 15 Schematic diagram of the walking mechanism of the present invention.

[0042] Figure Number:

[0043] Chassis 1, synchronization mechanism 2, brake disc tightening device 3, traveling mechanism 4, wheel hub bearing bolt 5, brake disc 6, main synchronization device 21, auxiliary synchronization device 22, moving device 31, tightening device 32, tightening device 33, floating device 34, traveling bracket 41, traveling lifting drive 42, traveling device 43, auxiliary synchronization bracket 221, auxiliary synchronization lifting device 222, auxiliary synchronization clamping device 223, longitudinal moving mechanism 311, transverse moving mechanism 312, lifting mechanism 313, brake disc tightening gun 331, rotating device 332, tightening bracket 333, tightening limit device 334, longitudinal floating assembly 341, transverse floating assembly 342, motor 431, traveling wheel 432, auxiliary synchronization clamping bracket 2231, auxiliary synchronization first clamping member 2232, auxiliary synchronization second clamping member 2233, auxiliary synchronization first drive device 2234, auxiliary synchronization second drive device 2 235, base 2236, swing member 2237, spring 2238, camera device 3331, second zero adjustment hole 3332, tighten the connecting plate 3341, tighten the bottom plate 3342, tighten the floating connecting member 3343, bolt limit block 3344, slot 3345, self-aligning bearing 3346, return spring 3347, rotation limit assembly 3348, longitudinal floating bracket 3411, longitudinal limit plate 3412, longitudinal first spring 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 zero adjustment hole 33411, tighten the first limit piece 33481, tighten the second limit piece 33482, tighten the limit cavity 33483. DETAILED DESCRIPTION

[0044] 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 given do not limit the present invention. In this embodiment, it should be understood that the directions or positional relationships indicated by terms such as "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention.

[0045] 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. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0046] Example 1

[0047] This embodiment provides a new energy vehicle brake disc tightening device, such as Figure 2 、 Figure 5-11 As shown, the disc tightening device 3 is used to tighten the brake disc. 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, which 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 inserted into the tightening bracket 333, and the tightening limit device 334 is arranged on the rotating device 332. The rotating device 332 and the tightening limit device 334 are provided with through-holes, and the brake disc tightening gun 331 is inserted into the openings. The brake disc tightening gun 331 is prior art and will not be described here.

[0048] In a preferred embodiment, two brake disc tightening devices 3 are provided, respectively tightening the nuts corresponding to the brake discs on both sides of the vehicle.

[0049] The tightening limit device 334 includes a tightening connecting plate 3341, a tightening base plate 3342, and a tightening floating connector 3343. The tightening floating connector 3343 is disposed on one side of the tightening connecting plate 3341, and the tightening base plate 3342 is disposed on one side of the tightening floating connector 3343. The tightening connecting plate 3341 is connected to the rotating device 332. Two or more bolt limit blocks 3344 are protruding from the side of the tightening base plate 3342 away from the tightening floating connector 3343, with slots 3345 formed between adjacent bolt limit blocks 3344. The rotating device 332 is used to drive the slots 3345 on the tightening limit device 334 to rotate. The slots 3345 are used to lock the bolts 5 of the wheel hub bearing to limit the rotation of the drive shaft. The brake disc tightening gun 331 is used to tighten the lock nut of the brake disc 6 on the drive shaft.

[0050] In a preferred embodiment, a plurality of the retaining grooves 3345 are provided, so that each bolt of the wheel hub bearing is positioned; the stability of the rotation of the current 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 arranged at intervals; specifically, there are five bolt limit blocks 3344, and five retaining grooves 3345 are formed between adjacent bolt limit blocks 3344.

[0051] The tightening bracket 333 is provided with a camera device 3331, which is used to identify the bolt position of the hub bearing. In a preferred embodiment, the camera device 3331 is a camera. After the camera device 3331 identifies the bolt position of the hub bearing, 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 realize the position alignment of the tightening device 32 and the drive shaft, and 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, and 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 positioned. The slot 3345 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 334, and the nut is tightened by the brake disc tightening gun 331, thereby realizing the tightening of the nut on the drive shaft.

[0052] In a preferred embodiment, the tightening floating connector 3343 is connected to the tightening base plate 3342 via a self-aligning bearing 3346. A return spring 3347 is also provided on the tightening connector, one end of which abuts the tightening base plate 3342. The tightening floating connector 3343 supports the tightening base plate 3342, and the self-aligning bearing 3346 enables the tightening base plate 3342 to swing along the axial direction of the opening. This allows the tightening base plate 3342 to swing under the action of an external force. When the tightening base plate 3342 contacts the brake disc, it can conform to the wall surface of the brake disc in different states, ensuring a good fit 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 tightening base plate 3342 is driven to reset under the elastic force of the reset spring 3347 itself, and then the self-aligning bearing 3346 is driven to reset, so that the tightening base plate 3342 can cooperate with another brake disc.

[0053] A rotation limiter assembly 3348 is provided between the tightening floating connector 3343 and the tightening base plate 3342. 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 limiting the movement of the tightening base plate 3342, the reaction force of the wheel hub bearing bolts on the retaining groove 3345 is prevented from driving the tightening base plate 3342 to rotate relative to the tightening floating connector 3343, thereby preventing the drive shaft from rotating and preventing the brake disc from being tightened.

[0054] The rotation limit assembly 3348 includes a first tightening limit member 33481 and two or more second tightening limit members 33482, and the second tightening limit members 33482 are protruding 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 is protruding from the surface of the tightening base plate 3342 toward the direction close to 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 are in contact with 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.

[0055] 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 pass through 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.

[0056] The tightening device 32 also includes a floating device 34, which comprises a longitudinal floating assembly 341 and a transverse floating assembly 342. The tightening device 33 is mounted on the transverse floating assembly 342. The longitudinal floating assembly 341 is mounted 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 and length directions of the tightening device 33. The floating device 34 offsets the reaction force generated by the tightening brake disc, preventing the reaction force generated by the tightening brake disc from acting on the tightening device 33 and extending the service life of the tightening device 33. The separate longitudinal floating assembly 341 and transverse floating assembly 342 buffer the reaction forces in different directions, thereby enhancing the offsetting effect.

[0057] The longitudinal floating assembly 341 includes a longitudinal floating bracket 3411, with longitudinal limit plates 3412 disposed at both ends of the longitudinal floating bracket 3411 in the vertical direction. A longitudinal floating guide post is disposed between the two longitudinal limit plates 3412. A first longitudinal spring 3413, a second longitudinal spring 3414, and a longitudinal floating block 3415 are mounted on the longitudinal floating guide post. The longitudinal floating block 3415 is located between the first and second longitudinal springs 3413 and 3414, and the transverse floating assembly 342 is connected to the longitudinal floating block 3415. In the longitudinal floating assembly 341, the first longitudinal spring 3413 buffers upward reaction forces, while the second longitudinal spring 3414 buffers downward reaction forces, thus buffering reaction forces in the longitudinal up-and-down directions. At the same time, the diameter of the longitudinal second spring 3414 is larger than the longitudinal first spring 3413, and the load of the longitudinal second spring 3414 is greater than the load of the longitudinal first spring 3413; the gravity of the transverse floating component 342 and the tightening device 33 itself acts on the longitudinal second spring 3414 through the longitudinal floating block 3415. Setting a longitudinal second spring 3414 with a larger diameter can better bear the weight of the floating component 342 and the tightening device 33, thereby improving the support effect on the transverse floating component 342 and the tightening device 33.

[0058] The transverse floating assembly 342 includes a transverse floating bracket 3421 connected to the longitudinal floating block 3415. Transverse limit plates 3422 are provided at both horizontal ends of the transverse floating bracket 3421, and a transverse floating guide post is provided between the transverse and longitudinal limit plates 3412. A first transverse spring 3423, a second transverse spring 3424, and a transverse floating block 3425 are provided on the transverse floating guide post. The transverse floating block 3425 is located between the first transverse spring 3423 and the second transverse spring 3424, and the tightening device 33 is connected to the transverse floating block 3425. In the transverse floating assembly 342, the first transverse spring 3423 buffers the leftward reaction force, while the second transverse spring 3424 buffers the rightward reaction force, thus buffering the reaction forces in the transverse left and right directions.

[0059] 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.

[0060] 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 .

[0061] A first detecting portion 3416 is provided on the longitudinal floating bracket 3411, and a second detecting portion 3426 is provided on the transverse floating bracket 3421. Both the first detecting portion 3416 and the second detecting portion 3426 are arranged along the height of the longitudinal floating bracket 3411, with the second detecting portion 3426 positioned opposite the first detecting portion 3416. Positional changes between the first detecting portion 3416 and the second detecting portion 3426 are used to detect the fatigue level of the first longitudinal spring 3413 and the second longitudinal spring 3414. The fatigue level of the first longitudinal spring 3413 and the second longitudinal spring 3414 is determined by the positional changes between the first detecting portion 3416 and the second detecting portion 3426, resulting in a simple structure. In this embodiment, the first detection portion 3416 and the second detection portion 3426 are in-situ holes; by detecting the position change of the center of the two in-situ holes, the fatigue degree of the first longitudinal spring 3413 and the second longitudinal spring 3414 can be determined.

[0062] 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, there is a misalignment between the first detection portion 3416 and the second detection portion 3426; the fatigue failure of the first longitudinal spring 3413 and the second longitudinal spring 3414 occurs.

[0063] 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 by the transverse moving mechanism 312 to move along the length direction of the chassis 1. 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.

[0064] 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 rack and pinion drives; the linear drive devices are existing technologies and will not be described here.

[0065] Example 2

[0066] This embodiment provides a vehicle production line, such as Figure 2-15 As shown; it includes a chassis 1, a synchronization mechanism 2 and a brake disc tightening device 3 arranged on the chassis 1, and the brake disc tightening device 3 has the same structure as that of embodiment 1.

[0067] The synchronization mechanism 2 includes a main synchronization device 21 and a secondary synchronization device 22. The main synchronization device 21 and the secondary synchronization device 22 are staggered on the chassis 1. The main synchronization device 21 is set on one side of the chassis 1, and the secondary synchronization device 22 is set 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. By staggering the main synchronization device 21 and the secondary synchronization device 22 along the forward direction of the chassis 1, different areas of the chassis 1 are connected to the sling, and the sling 1 has good stability in driving the chassis to move. The main synchronization device 21 is prior art and has been disclosed in the patent document with application number CN202310461446.3, and will not be described in detail here.

[0068] 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 close to or away from the sling, and the auxiliary synchronous lifting device 222 is a cylinder.

[0069] The secondary synchronous clamping device 223 includes a secondary synchronous clamping bracket 2231 and movable secondary synchronous first and second clamping members 2232 and 2233. A secondary synchronous first drive device 2234 and a secondary synchronous second drive device 2235 are provided on the secondary synchronous clamping bracket 2231. The secondary synchronous first drive device 2234 is located at one end of the secondary synchronous clamping bracket 2231 and is connected to the secondary synchronous first clamping member 2232. The secondary synchronous second drive device 2235 is located at the other end of the secondary synchronous clamping bracket 2231 and is connected to the secondary synchronous second clamping member 2233. The secondary synchronous first and second clamping members 2232 and 2233 are positioned close to each other to clamp the sling. Both the secondary synchronous first and second drive devices 2234 and 2235 are pneumatic cylinders.

[0070] In the secondary synchronous clamping device 223, the secondary synchronous first clamping member 2232 and the secondary synchronous second clamping member 2233 are close to each other to achieve clamping of the sling; the secondary synchronous first clamping member 2232 and the secondary synchronous second clamping member 2233 are away from each other to achieve separation of the secondary synchronous clamping device 223 and the sling; since the secondary synchronous first clamping member 2232 and the secondary synchronous second clamping member 2233 are both movably arranged, when clamping the sling, the sling is moved between the secondary synchronous first clamping member 2232 and the secondary synchronous second clamping member 2233, which can drive the secondary synchronous first clamping member 2232 and the secondary synchronous second clamping member 2233 to clamp the sling; in this way, when clamping the sling in multiple positions, it will not be affected by the error of the distance between the sling and the secondary synchronous first clamping member 2232 and the distance between the sling and the secondary synchronous second clamping member 2233. The independently driven auxiliary synchronous first clamping member 2232 and the auxiliary synchronous second clamping member 2233 are provided, which has good reliability.

[0071] The secondary synchronous second clamping member 2233 includes a base 2236 and a swinging member 2237, and the end of the swinging member 2237 away from the first clamping member is hinged on the base 2236, and a spring 2238 is further 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 jacking device 222; then the sling is driven to approach the secondary synchronous clamping device 223, and when the sling contacts the swinging member 2237, the elastic force of the spring 2238 is overcome and the swinging member 2237 is driven to swing down, and then the sling is continued to move so that the clamping area of ​​the sling is located between the first clamping member and the second clamping member; the swing 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.

[0072] In a preferred embodiment, a liftable walking mechanism 4 is also provided on the chassis 1; the walking mechanism 4 includes a walking bracket 41, a walking lifting drive 42 and a walking device 43; the walking bracket 41 is set on the chassis 1, and the walking device 43 is movably set on the walking bracket 41; the fixed end of the walking lifting drive 42 is set on the walking bracket 41, and the movable end of the walking lifting drive 42 is connected to the walking device 43; the walking device 43 includes a motor 431 and a walking wheel 432.

[0073] When the chassis 1 moves following the sling, the travel lifting drive 42 raises the travel device 43 so that the travel wheels 432 of the travel device 43 are not in contact with the ground; after the brake disc is tightened, the travel lifting drive 42 lowers the travel device 43 so that the travel wheels 432 of the travel device 43 are in contact with the ground; then the motor 431 drives the travel wheels 432 to move and drive the chassis 1 to move, thereby realizing the reset of the chassis 1.

[0074] A brake disc chassis tightening method comprises the following steps:

[0075] S1 , driving the main synchronizer 21 and the auxiliary synchronizer 22 to rise, and moving the area to be clamped of the spreader into the main synchronizer 21 and the auxiliary synchronizer 22 .

[0076] 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 the other 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.

[0077] S3. Preset the first position and the second position on one side of the vehicle; preset the first position and the second position on one side of the vehicle; the first position is the corresponding position of one drive shaft; the second position is the corresponding position of the other drive shaft.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] S7, the brake disc tightening gun 331 tightens the locking nut of the brake disc on the drive shaft; then S8 is performed.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] S11, the brake disc tightening gun 331 tightens the locking nut of the brake disc on the drive shaft; then S12 is performed.

[0086] S12, the main synchronization device 21 and the auxiliary synchronization device 22 are separated from the lifting appliance; the chassis 1 is reset.

[0087] In this specification, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can be 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, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0088] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0089] 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 brake disc tightening device, characterized by: It 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 passed through the opening; the tightening limit device includes a tightening base plate, and a clamping groove is provided on the tightening base plate. The rotating device is used to drive the clamping groove on the tightening limit device to rotate, and the clamping groove 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 tightening limit device also includes a tightening floating connection piece, which is connected to the tightening base plate via a self-aligning bearing; a return spring is also provided on the tightening connection piece, one end of which abuts against the tightening base plate; a rotation limit assembly is also provided between the tightening floating connection piece 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 connection piece; the rotation limit assembly is a chimeric structure provided on the opposite wall surface of the tightening floating connection piece and the tightening base plate; 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.

2. The new energy vehicle brake disc tightening device according to claim 1 is characterized in that: The longitudinal floating assembly includes a longitudinal floating bracket, with longitudinal limit plates 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.

3. The new energy vehicle brake disc tightening device according to claim 2, characterized in that: 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.

4. A vehicle production line, characterized in that: It includes a chassis and a brake disc tightening device as described in any one of claims 1 to 3. The brake disc tightening device is arranged on the chassis. A synchronization mechanism is also provided on the chassis. The synchronization mechanism includes a main synchronization device and a sub-synchronization device. The main synchronization device and the sub-synchronization device can be raised and lowered and are both used to clamp the sling. The main synchronization device and the sub-synchronization device drive the chassis to move with the sling.

5. The vehicle production line according to claim 4, characterized in that: The auxiliary synchronous device includes an auxiliary synchronous lifting device and an auxiliary synchronous clamping device. The auxiliary synchronous lifting device is used to drive the auxiliary synchronous clamping device to move closer to or away from the spreader. The auxiliary synchronous clamping device includes a movably arranged auxiliary synchronous first clamping member and an auxiliary synchronous second clamping member. The auxiliary synchronous first clamping member and the auxiliary synchronous second clamping member are close to each other to clamp the spreader. The auxiliary synchronous device drives the chassis to move with the spreader.

6. The vehicle production line according to claim 5, characterized in that: The secondary synchronous clamping device also includes a secondary synchronous clamping bracket, a secondary synchronous first drive device and a secondary synchronous second drive device arranged on the secondary synchronous clamping bracket, the secondary synchronous first drive device is arranged at one end of the secondary synchronous clamping bracket and connected to the secondary synchronous first clamping member, and the secondary synchronous second drive device is arranged at the other end of the secondary synchronous clamping bracket and connected to the secondary synchronous second clamping member.

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