A steering system with good stability

Abstract

The application provides a steering system with good stability, which comprises a first transmission member, a wheel connected to the first transmission member, and a wheel core of the first transmission member; a threaded part is arranged at one end of the wheel core away from a wheel rim stand column, two or more than two positioning pins are arranged between the threaded part and the wheel rim stand column, and a positioning hole matched with the positioning pins is arranged on the wheel; the wheel core is threadedly connected with a locking nut through the wheel at one end close to the threaded part; the positioning pins are inserted into the positioning hole; a step part is arranged at one end of the threaded part away from the wheel rim stand column, two insertion holes which are axially symmetrical with respect to the wheel core are arranged on the step part, a anti-dislocation device is arranged between the two insertion holes, the anti-dislocation device comprises two insertion pieces, and a torsion spring is connected between the two insertion pieces; the insertion pieces are one-to-one corresponding to the insertion holes, the insertion pieces are arranged outward from the inner wall of the step part, and one end of the insertion pieces outward extending through the insertion holes axially limits the locking nut.

Description

TECHNICAL FIELD

[0001] The present application relates to formula racing cars, in particular to a steering system with good stability. BACKGROUND

[0002] The steering system is used for realizing steering of a wheel, comprising a steering device and a wheel driven by the steering device, and the existing wheel only realizes fixation of the wheel through nut and bolt connection, without limiting the nut in the axial direction of the bolt, and the position of the nut can be moved relative to the bolt, so that the nut is prone to loosening and dislocation from the bolt, and the fixation effect of the wheel is poor. Meanwhile, the connection structure between the wheel rim upright column and the wheel core of the existing racing car is complex.

[0003] A racing car steering knuckle upright column structure is disclosed in the patent document with Chinese application number 201921509968.1 and publication date 2020.5.22, comprising an upright column body, bearings are arranged at both ends of the inside of the upright column body, a wheel core is sleeved on the inner side of the upright column body, and a locking nut is installed at one end of the upright column body. The racing car steering knuckle upright column structure is fixed on the wheel core through the locking nut, the locking nut presses the single-sided bearing, the locking nut limits the bearing in the direction of disengaging from the wheel core, the structure is complex, and meanwhile, since no structure for accommodating the bearing is arranged in the upright column body, the bearing is movable between the one end of the wheel core close to the locking nut and the other end of the wheel core; the movement efficiency between the upright column body and the wheel core is poor. SUMMARY

[0004] The present application provides a steering system with good stability, the connection structure between the wheel rim upright column and the wheel core is simple and stable; the anti-dislocation device is arranged on the wheel core to axially limit the locking nut, and the locking nut stably locks the wheel on the wheel core.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows: a steering system with good stability, comprising a driven wheel assembly, a synchronization device and a steering device; the driven wheel assembly comprises first transmission members arranged on both sides of a vehicle frame respectively, the first transmission members are connected with wheels, the two first transmission members are connected through the synchronization device, and the synchronization device is connected with the steering device.

[0006] The first transmission member comprises a wheel core and a wheel rim upright column, the wheel core is arranged in the wheel rim upright column and is rotatably connected with the wheel rim upright column; the wheel rim upright column is hinged with the vehicle frame; a threaded portion is arranged at the one end of the wheel core away from the wheel rim upright column, two or more than two positioning pins are arranged between the threaded portion and the wheel rim upright column, and a positioning hole matched with the positioning pins is arranged on the wheel; the one end of the wheel core close to the threaded portion is threadedly connected with a locking nut through the wheel; and the positioning pins are inserted into the positioning hole.

[0007] The threaded part is provided with a stepped part at the end away from the wheel rim stand, two plug-in holes are arranged on the stepped part and axially symmetric about the wheel core, a anti-displacement device is arranged between the two plug-in holes, the anti-displacement device comprises two plug-in pieces, and a torsion spring is connected between the two plug-in pieces; the plug-in pieces are correspondingly arranged in plug-in mode from the inner wall of the stepped part to the outside, and the end of the plug-in piece extending out from the plug-in hole is axially limited to the locking nut.

[0008] The wheel core is rotatably connected with the wheel rim stand through a rotating assembly; the wheel rim stand comprises a rotating hole, a first accommodating groove is arranged on one side of the rotating hole, and a second accommodating groove is arranged on the other side of the rotating hole, and a resisting part is formed between the first accommodating groove and the second accommodating groove; the rotating assembly comprises a first bearing and a second bearing; the first bearing is arranged in the first accommodating groove, and the second bearing is arranged in the second accommodating groove; the side surface of the outer ring of the first bearing abuts against the resisting part, and the side surface of the outer ring of the second bearing abuts against the resisting part.

[0009] One end of the wheel core is arranged to pass through the first bearing, the second bearing and the rotating hole; the wheel core is in interference fit with the inner ring of the first bearing, and the wheel core is in interference fit with the inner ring of the second bearing; the outer ring of the first bearing is attached to the inner wall of the first accommodating groove; and the outer ring of the second bearing is attached to the inner wall of the second accommodating groove.

[0010] A limiting stopper is arranged on the side of the second bearing away from the first bearing, the limiting stopper is provided with a limiting through hole, and the wheel core is arranged to pass through the limiting through hole and is in interference fit with the limiting through hole.

[0011] With the above arrangement, the first transmission piece is locked by cooperation of the locking nut and the threaded part; the wheels on both sides of the vehicle frame are locked; only one locking nut is used for fixing, the structure is simple, and the vehicle frame is quickly assembled and disassembled; the positioning pin on the wheel core is inserted into the positioning hole on the wheel, and the positioning pin rotates along the circumference of the wheel core to drive the wheel to rotate; the locking nut is limited by the anti-displacement device, and the locking nut is pressed against the first transmission piece and the upper part, so that the stable connection between the locking nut and the transmission piece is realized.

[0012] The first bearing and the second bearing are axially fixed on the wheel core through the interference fit between the wheel core and the inner rings of the first bearing and the second bearing, the axially fixed first bearing and the second bearing are axially resisted by the resisting part, the wheel core is axially limited, and the rotatable connection between the wheel core and the wheel rim stand is realized; the second bearing is resisted by the limiting stopper, the second bearing is prevented from being displaced, and the connection stability between the wheel core and the wheel rim stand is further improved.

[0013] Further, the plug-in part comprises a plug-in portion and a pressing portion, the plug-in portion is arranged at one side of the pressing portion, the plug-in portion is matched with the plug-in hole in size and is smaller than the pressing portion in size, the plug-in portion passes through the plug-in hole to resist the pressing portion from the inner wall of the step portion; the pressing portion is provided with locking holes, one force arm of the torsion spring is connected with one locking hole, and the other force arm of the torsion spring is connected with the other locking hole; the pressing portions of the two plug-in parts are pressed on the inner wall of the step portion under the elastic force of the torsion spring.

[0014] The plug-in portion passes through the plug-in hole to extend to the outside of the step portion, the plug-in portion resists the locking nut to limit the axis of the locking nut, the two plug-in parts are connected through the torsion spring, the two plug-in parts are pressed on the inner wall of the step portion under the elastic force of the torsion spring, and the structure is simple.

[0015] Further, the synchronous device comprises a synchronous bracket, a first transmission rod, a second transmission rod, a third transmission rod, a synchronous gear shaft and a sleeve assembly; the synchronous bracket is provided with fixed seats at two ends respectively, and the sleeve assembly is fixed between the two fixed seats; the first transmission rod passes through the sleeve assembly, one end of the first transmission rod is hinged with the second transmission rod on one fixed seat, and the other end of the first transmission rod is hinged with the third transmission rod on the other fixed seat through sliding; the first transmission rod is slidingly arranged on the two fixed seats; the second transmission rod is hinged with one side of a first transmission member; the third transmission rod is hinged with one side of another first transmission member; the first transmission rod is provided with a rack at one side, the sleeve assembly comprises a mounting seat, the mounting seat is provided with an opening corresponding to the rack at one side; the synchronous gear shaft is installed in the mounting seat, and the gear of the synchronous gear shaft is engaged with the rack through the opening; and the synchronous gear shaft is connected with a steering device.

[0016] The two first transmission members are connected through the synchronous device, one end of the first transmission rod moves to push the second transmission rod to extend, and the other end of the first transmission rod moves to pull the third transmission rod to retract; one end of the first transmission rod moves to push the third transmission rod to extend, and the other end of the first transmission rod moves to pull the second transmission rod to retract; and synchronous steering of the two wheels is realized.

[0017] Further, the top of the wheel-side stand is provided with a first hinged seat, and the bottom of the wheel-side stand is provided with a second hinged seat; the first hinged seat is located above the wheel core, and the second hinged seat is located below the wheel core; the wheel-side stand is further provided with a third hinged seat, and the third hinged seat is located at one side of the wheel core; the first hinged seat, the second hinged seat and the third hinged seat are all arranged transversely along the axial direction of the wheel core.

[0018] The wheel-side stand can swing left and right relative to the frame along the length direction of the frame.

[0019] Furthermore, the second transmission rod is hinged to the third hinge seat of a first transmission member; the third transmission rod is hinged to the third hinge seat of another first transmission member.

[0020] The above setup, through a synchronization device, drives the third articulated seat to move, thereby causing the wheel-side column to swing, and thus the wheel to swing. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention installed on a racing car.

[0022] Figure 2 This is a three-dimensional schematic diagram of the present invention.

[0023] Figure 3 This is a three-dimensional schematic diagram of the synchronization device in this invention.

[0024] Figure 4 This is a three-dimensional schematic diagram of the synchronization device in this invention without the second and third transmission rods.

[0025] Figure 5 This is a schematic diagram of the connection between the wheel and the first transmission component in this invention.

[0026] Figure 6 This is an exploded view of the wheel, the first transmission component, and the locking nut in this invention.

[0027] Figure 7 This is a three-dimensional schematic diagram of the wheel in this invention.

[0028] Figure 8 This is an exploded view of the first transmission component in this invention.

[0029] Figure 9 This is a cross-sectional view of the connection between the wheel core and the wheel edge post in this invention.

[0030] Figure 10 This is a sectional view showing the disassembled wheel core and wheel edge post in this invention. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-10 As shown, a stable steering system is installed on a racing car, which includes a chassis 1. The steering system includes a driven wheel assembly 51; the driven wheel assembly 51 includes first transmission members 53 respectively disposed on both sides of the chassis 1, with wheels 54 connected to the first transmission members 53, and a synchronizing device 55 connected between the two first transmission members 53. The synchronizing device 55 is connected to a steering device 56. The synchronizing device 55 enables synchronous steering of the two wheels 54.

[0033] The first transmission member 53 comprises a wheel core 531 and a wheel rim upright 532, and the wheel rim upright 532 is swingably connected with the frame 1; the wheel core 531 is arranged on the wheel rim upright 532 and is rotatably connected with the wheel rim upright 532 through a rotating assembly.

[0034] The wheel rim upright 532 comprises a rotating hole 5321, a first accommodating groove 5322 is arranged on one side of the rotating hole 5321, a second accommodating groove 5323 is arranged on the other side of the rotating hole 5321, and a resisting portion 5324 is formed between the first accommodating groove 5322 and the second accommodating groove 5323; the rotating assembly comprises a first bearing 541 and a second bearing 542; the first bearing 541 is arranged in the first accommodating groove 5322, and the second bearing 542 is arranged in the second accommodating groove 5323; the side surface of the outer ring of the first bearing 541 abuts against the resisting portion 5324, and the side surface of the outer ring of the second bearing 542 abuts against the resisting portion 5324.

[0035] One end of the wheel core 531 is arranged on the first bearing 541, the second bearing 542 and the rotating hole 5321; the wheel core 531 is in interference fit with the inner ring of the first bearing 541, the wheel core 531 is in interference fit with the inner ring of the second bearing 542, the outer ring of the first bearing 541 is in abutment with the inner wall of the first accommodating groove 5322, and the outer ring of the second bearing 542 is in abutment with the inner wall of the second accommodating groove 5323. Through the interference fit between the wheel core 531 and the inner rings of the first bearing 541 and the second bearing 542, the first bearing 541 and the second bearing 542 are axially fixed on the wheel core 531, the axially fixed first bearing 541 and the second bearing 542 are axially resisted by the resisting portion 5324, the axial position of the wheel core 531 is limited, and the rotatable connection between the wheel core 531 and the wheel rim upright 532 is realized.

[0036] A limiting stopper 543 is arranged on the side of the second bearing 542 away from the first bearing 541, the limiting stopper 543 is provided with a limiting through hole 5431, the wheel core 531 is arranged in the limiting through hole 5431 and is in interference fit with the limiting through hole 5431; the second bearing 542 is resisted by the limiting stopper 543 to prevent dislocation of the second bearing 542, and the connection stability between the wheel core 531 and the wheel rim upright 532 is further improved.

[0037] The top of the wheel-side column 532 is provided with a first hinging seat 5325, and the bottom of the wheel-side column 532 is provided with a second hinging seat 5326; the first hinging seat 5325 is located above the wheel core 531, and the second hinging seat 5326 is located below the wheel core 531; the first hinging seat and the second hinging seat coincide in the height projection direction of the wheel core; a third hinging seat 5327 is further provided on the wheel-side column 532, and the third hinging seat 5327 is located on one side of the wheel core 531; the first hinging seat 5325, the second hinging seat 5326 and the third hinging seat 5327 are all transversely arranged along the axial direction of the wheel core 531; the third hinging seat 5327 is connected with the synchronous device 55. Referring to Figure 1 the drawings; the first hinging seat 5325 and the second hinging seat 5326 are hinged with the vehicle frame through a connecting rod 57, the center line of the first hinging seat and the second hinging seat in the height direction of the wheel-side column is the swing axis of the wheel-side column, and the synchronous device drives the wheels to swing along the swing axis of the wheel-side column; referring to Figure 1 the drawings, the wheel-side column 532 can swing left and right relative to the vehicle frame along the length direction of the vehicle frame. The synchronous device 55 drives the third hinging seat 5327 to move, so as to realize the swing of the wheel-side column 532, and further realize the swing of the wheels 54.

[0038] As shown in Figure 3 and Figure 4 the drawings, the synchronous device 55 comprises a synchronous bracket 550, a first transmission rod 551, a second transmission rod 552, a third transmission rod 553, a synchronous gear shaft 554 and a sleeve assembly 555; the two ends of the synchronous bracket 550 are respectively provided with fixed seats 5501, and the sleeve assembly 555 is fixed between the two fixed seats 5501; the first transmission rod 551 is arranged in the sleeve assembly 555, one end of the first transmission rod 551 is hinged with the second transmission rod 552 through one fixed seat 5501, and the other end of the first transmission rod 551 is hinged with the third transmission rod 553 through the other fixed seat 5501; the first transmission rod 551 is slidingly arranged on the two fixed seats 5501; the second transmission rod 552 is hinged with the third hinging seat 5327 of one first transmission member; and the third transmission rod 553 is hinged with the third hinging seat 5327 of the other first transmission member.

[0039] A rack 5511 is arranged on one side of the first transmission rod 551, the sleeve assembly 555 comprises a mounting seat 551, an opening 5552 corresponding to the rack 5511 is arranged on one side of the mounting seat 551; the synchronous gear shaft 554 is mounted on the mounting seat 551, and the gear of the synchronous gear shaft 554 is engaged with the rack 5511 through the opening 5552; the synchronous gear shaft 554 is connected with the steering device; the synchronous gear shaft 554 is driven to rotate by the steering device, the first transmission rod 551 is driven to slide by the synchronous gear shaft 554, and the first transmission rod 551 and the second transmission rod 552 are synchronously moved by the first transmission rod 551; and the synchronous steering of the two wheels 54 is realized.

[0040] As Figure 8 shown, a threaded portion 5311 is arranged at the end of the wheel core 531 away from the wheel rim upright 532, the end of the wheel core 531 close to the threaded portion 5311 is screwed with the locking nut 533 through the wheel 54; two or more than two positioning pins 5312 are arranged between the threaded portion 5311 and the wheel rim upright 532, positioning holes 541 are arranged on the wheel 54 and matched with the positioning pins 5312, the positioning pins 5312 are inserted into the positioning holes 541; the rotating wheel core 531 drives the wheel 54 to rotate. A stepped portion 5313 is arranged at the end of the threaded portion 5311 away from the wheel rim upright 532, the diameter of the stepped portion 5313 is smaller than that of the threaded portion 5311.

[0041] Two insertion holes 5314 are arranged on the stepped portion 5313 and symmetrically arranged with respect to the axial direction of the wheel core 531, a anti-displacement device 58 is arranged in the two insertion holes 5314 and axially limits the locking nut 533. The first transmission member 53 is locked by the cooperation of the locking nut 533 and the threaded portion 5311; the wheels 54 on both sides of the frame 1 are locked; only one locking nut 533 is used for fixing, the structure is simple; the wheel 54 is quickly assembled and disassembled; the locking nut 533 is limited by the anti-displacement device 58 and pressed on the first transmission member 53, so that the stable connection between the locking nut 533 and the transmission member is realized.

[0042] As Figure 8 shown, the anti-displacement device 58 includes two insertion pieces 581, the insertion pieces 581 are one-to-one matched with the insertion holes 5314; the insertion pieces 581 are inserted and arranged from the inner wall of the stepped portion 5313 to the outside, the insertion piece 581 includes an insertion portion 582 and a pressing portion 583, the insertion portion 582 is arranged on one side of the pressing portion 583, the size of the insertion portion 582 is matched with the size of the insertion hole 5314 and smaller than the size of the pressing portion 583, the insertion portion 582 passes through the insertion hole 5314 and resists the pressing portion 583 from the inner wall of the stepped portion 5313; a locking hole 5831 is arranged on the pressing portion 583, the two insertion pieces 581 are connected by a torsion spring 584, one force arm of the torsion spring 584 is connected with one locking hole 5831, the other force arm of the torsion spring 584 is connected with the other locking hole 5831; the pressing portions 583 of the two insertion pieces 581 are pressed on the inner wall of the stepped portion 5313 under the elastic force of the torsion spring 584.

[0043] The plug-in part 582 extends to the outside of the step part 5313 through the plug-in hole 5314, and the locking nut 533 is resisted by the plug-in part 582, so that the axial position of the locking nut 533 is limited; meanwhile, the two plug-in parts 581 are connected through the torsion spring 584; the torsion spring 584 generates pressure on the two plug-in parts 581 under the elastic force of the torsion spring 584, so that the two pressing parts 583 are pressed on the inner wall of the step part 5313 at the same time, and the structure is simple.

Claims

1. A steering system with good stability, characterized by: The application relates to a driving wheel assembly, a synchronous device and a steering device; the driving wheel assembly comprises first transmission members arranged on the two sides of a vehicle frame respectively, wheels connected to the first transmission members, and the two first transmission members connected through the synchronous device; the synchronous device is connected with the steering device; The first transmission member comprises a wheel core and a wheel edge stand column, the wheel core is arranged in the wheel edge stand column and is rotatably connected with the wheel edge stand column; the wheel edge stand column is hingedly connected with the vehicle frame; a threaded part is arranged at the end of the wheel core away from the wheel edge stand column; two or more than two positioning pins are arranged between the threaded part and the wheel edge stand column; positioning holes matched with the positioning pins are arranged on the wheel; the end of the wheel core close to the threaded part is threadedly connected with a locking nut through the wheel; the positioning pins are inserted into the positioning holes; A step part is arranged at the end of the threaded part away from the wheel edge stand column; two insertion holes which are axially symmetrical with respect to the wheel core are arranged on the step part; a anti-dislocation device is arranged between the two insertion holes; the anti-dislocation device comprises two insertion pieces and a torsion spring connected between the two insertion pieces; the insertion pieces are one-to-one correspondingly inserted into the insertion holes and arranged outward from the inner wall of the step part; the ends of the insertion pieces outward extending through the insertion holes axially limit the locking nut; The wheel core is rotatably connected with the wheel edge stand column through a rotating assembly; the wheel edge stand column comprises a rotating hole, a first accommodating groove arranged on one side of the rotating hole, and a second accommodating groove arranged on the other side of the rotating hole; a resisting part is formed between the first accommodating groove and the second accommodating groove; the rotating assembly comprises a first bearing and a second bearing; the first bearing is arranged in the first accommodating groove and the second bearing is arranged in the second accommodating groove; the side surface of the outer ring of the first bearing abuts against the resisting part and the side surface of the outer ring of the second bearing abuts against the resisting part; One end of the wheel core is arranged in the first bearing, the second bearing and the rotating hole; the wheel core is in interference fit with the inner ring of the first bearing and the inner ring of the second bearing; the outer ring of the first bearing is in close contact with the inner wall of the first accommodating groove; the outer ring of the second bearing is in close contact with the inner wall of the second accommodating groove; A limiting stopper is arranged on the side of the second bearing away from the first bearing; the limiting stopper is provided with a limiting through hole; the wheel core is arranged in the limiting through hole and in interference fit with the limiting through hole; the insertion piece comprises an insertion part and a pressing part; the insertion part is arranged on one side of the pressing part; the size of the insertion part is matched with the size of the insertion hole and is smaller than the size of the pressing part; the insertion part passes through the insertion hole and resists the pressing part from the inner wall of the step part; the pressing part is provided with locking holes; one arm of the torsion spring is connected with one locking hole and the other arm of the torsion spring is connected with the other locking hole; the pressing parts of the two insertion pieces are pressed on the inner wall of the step part under the elastic force of the torsion spring; the two first transmission members are connected through the synchronous device; when one end of the first transmission rod moves to push the second transmission rod to extend, the other end of the first transmission rod moves to pull the third transmission rod to retract; when one end of the first transmission rod moves to push the third transmission rod to extend, the other end of the first transmission rod moves to pull the second transmission rod to retract; the synchronous steering of the two wheels is realized.

2. A steering system with good stability according to claim 1, characterized in that The synchronization device comprises a synchronization bracket, a first transmission rod, a second transmission rod, a third transmission rod, a synchronization gear shaft and a sleeve assembly; the synchronization bracket is provided with a fixed seat at each end, and the sleeve assembly is fixed between the two fixed seats; the first transmission rod is arranged in the sleeve assembly, one end of the first transmission rod is hingedly connected with the second transmission rod on one fixed seat, and the other end of the first transmission rod is hingedly connected with the third transmission rod on the other fixed seat; the first transmission rod is slidably arranged on the two fixed seats; the second transmission rod is hingedly connected with one side of a first transmission member; the third transmission rod is hingedly connected with one side of another first transmission member; a rack is arranged on one side of the first transmission rod, the sleeve assembly comprises a mounting seat, an opening corresponding to the rack is arranged on one side of the mounting seat; the synchronization gear shaft is arranged in the mounting seat, and the gear of the synchronization gear shaft is engaged with the rack through the opening; the synchronization gear shaft is connected with the steering device.

3. A steering system with good stability according to claim 2, characterized in that: The top of the wheel-side stand is provided with a first hinged seat, and the bottom of the wheel-side stand is provided with a second hinged seat; the first hinged seat is located above the wheel core, and the second hinged seat is located below the wheel core; the first hinged seat and the second hinged seat coincide in the height projection direction of the wheel core; a third hinged seat is further arranged on the wheel-side stand, and the third hinged seat is located on one side of the wheel core; the first hinged seat, the second hinged seat and the third hinged seat are all arranged transversely along the axial direction of the wheel core.

4. The steering system of claim 3, wherein: The second transmission rod is hingedly connected with the third hinged seat of one first transmission member; and the third transmission rod is hingedly connected with the third hinged seat of another first transmission member.

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