CN104251780B - Four-wheel dynamically positions wheelbase measuring device - Google Patents

Abstract

The invention relates to the field of automobile detection devices, and aims to provide a four-wheel dynamic positioning wheelbase measurement device. A four-wheel dynamic positioning wheel base measurement device, including two wheel tracks with brackets, one wheel track is equipped with a fixed wheel positioning platform and a follower wheel positioning platform, and the other wheel track is equipped with two follower wheel positioning platforms. Moving wheel alignment table, three measuring assemblies each opposite to a follower wheel alignment table and connected to the bracket, four wheel drive assemblies; one wheel drive assembly is connected to a fixed wheel alignment table; the other three wheel drive assemblies are each connected to a Follow-up wheel alignment table connection. The four-wheel dynamic positioning wheelbase measurement device can locate the dynamic position of the four-wheel axles and measure the four-wheel wheelbase, and has high measurement accuracy.

Description

Four-wheel dynamic positioning wheelbase measuring device

technical field

The invention relates to the field of automobile detection devices, in particular to a four-wheel dynamic positioning wheelbase measurement device.

Background technique

In order to ensure that the car does not deviate when driving in a straight line, the steering is good, and there are no adverse phenomena such as sideslip, to improve the steering stability and directional stability of the car, and to reduce the amount of tire wear, it is necessary to carry out the dynamic position of the four-wheel axle. Positioning and measuring the wheelbase to provide reliable data for adjustment; the utility model of Chinese patent application number: 00221216.1 discloses a wheel track measuring device, which is composed of two measuring units, each unit consists of a pedal through four A steel ball is connected to four force sensors. The wheel base measurement device has low measurement accuracy, and cannot locate the dynamic position of the four-wheel axle and measure the four-wheel base

Therefore, it is an urgent problem to design a four-wheel dynamic positioning wheelbase measurement device that can locate the dynamic position of the four-wheel axle and measure the four-wheel wheelbase with high measurement accuracy.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the current wheel track measuring device, which has low measurement accuracy, cannot locate the dynamic position of the four-wheel axle and measure the four-wheel axle base, and provide a method that can measure the dynamic position of the four-wheel axle. Position and measure the four-wheel wheelbase, and the four-wheel dynamic positioning wheelbase measuring device with high measurement accuracy.

Concrete technical scheme of the present invention is:

A four-wheel dynamic positioning wheelbase measurement device, including two wheel tracks with brackets, one wheel track is equipped with a fixed wheel positioning platform and a follower wheel positioning platform, and the other wheel track is equipped with two follower wheel positioning platforms. Moving wheel alignment table, three measuring assemblies each opposite to a follower wheel alignment table and connected to the bracket, four wheel drive assemblies; one wheel drive assembly is connected to a fixed wheel alignment table; the other three wheel drive assemblies are each connected to a Follow-up wheel alignment table connection. When the four-wheel dynamic positioning wheelbase measurement device is used, the wheels on both sides of the vehicle to be detected are respectively driven on two wheel tracks, one wheel is located on the wheel driving assembly on the fixed wheel alignment platform, and the other three wheels are located on a random track. on the wheel driving assembly on the moving wheel positioning platform; the starting wheel driving assembly each drives a wheel to rotate, and the positions of the three wheel driving assemblies connected to a follower wheel positioning platform are adapted to the wheels and each drives a follower seat to follow Dynamic positioning, the displacement of each follower seat is measured by the measuring component and the wheelbase is measured by calculation. The four-wheel dynamic positioning wheelbase measurement device can locate the dynamic position of the four-wheel axles and measure the four-wheel wheelbase, and has high measurement accuracy.

As a preference, the follower wheel positioning platform includes a follower seat with two articulated shafts at the lower end, a plurality of bases supporting the balls of the follower seat at the upper end, and a locking shaft at each end. Rotary arms each hinged to a hinge shaft, two sector gears meshing with each other and each connected to the other end of a rotary arm, a drive arm connected at one end to one end of a rotary arm, hinged to the base and the cylinder rod to the drive arm The first unlocking cylinder hinged at the other end has a frustum-shaped locking hole on the upper surface and a mounting plate connected to the outside of the base, and the second unlocking cylinder connected to the follower seat has a cone matching the frustum-shaped locking hole on the lower end. A table-shaped locking head and a locking rod whose upper end is connected with the cylinder rod of the second unlocking cylinder, two limit cylinders connected with the mounting plate respectively, two limit shafts each connected with the cylinder rod of a limit cylinder, two a limit screw and two nuts; the follower is provided with two through holes with a diameter greater than the diameter of the limit screw and limit holes opposite to the two limit shafts; the width of the limit hole is greater than the diameter of the limit shaft; The length of the limit hole is greater than the distance between the opposite sides of the two limit shafts; one end of the screw of the two limit screws passes through a through hole and the mounting plate and is threaded with a nut; the base is provided with a horizontal positioning plate; horizontal positioning One end of the plate is provided with an isosceles trapezoidal projection whose small end is on the outside; the transverse positioning plate is provided with two locking grooves respectively located on both sides of the isosceles trapezoidal projection and whose width matches the locking axis. The follower wheel positioning platform is easy to lock and unlock; the two limit shafts cooperate with the limit holes to limit the range of the follower's horizontal follow-up; the two limit screws not only ensure the follow-up of the follower flexibly, but also limit the The upward movement of the moving seat.

Preferably, the fixed wheel alignment platform includes a fixed platform and an underframe connected with the fixed platform. The structure of the fixed wheel alignment table is simple and practical.

As a preference, the wheel drive assembly includes a supporting seat provided with two side plates, an electric drum provided with a motor and pivotally connected to a side plate at both ends, and an electric drum arranged in parallel and connected to a side plate at both ends. The articulated driven roller, the brake cylinder located under the electric roller and the driven roller and connected with the follower seat or the fixed platen, the brake block located between the electric roller and the driven roller and connected with the cylinder rod of the brake cylinder. The wheel driving assembly has a simple structure and is convenient to drive. The brake block brakes the electric drum and the driven drum so that the vehicle wheels do not slip when driving up or down the wheel track.

Preferably, the measuring assembly includes a displacement sensor where the measuring rod is opposite to the follower seat, and two fixing hoops that press the displacement sensor and are connected with the bracket. The displacement sensor measures accurately and is easy to connect with the controller to calculate the wheelbase.

Preferably, the frustum-shaped locking hole includes a lower frustum-shaped hole matched with the locking rod and an upper frustum-shaped hole whose small end is connected to the large end of the lower frustum-shaped hole; the cone angle of the upper frustum-shaped hole is larger than that of the lower cone The taper angle of the trapezoidal hole. The upper frustum-shaped hole facilitates the insertion of the locking rod into the lower frusto-conical hole for locking.

Preferably, the follower wheel positioning platform further includes a connecting frame connected to the first unlocking cylinder, two photoelectric sensors connected to the connecting frame, and a detection block connected to one end of a rotating arm. The unlocking and locking status of the first unlocking cylinder can be detected by the photoelectric sensor and the detection block.

Compared with the prior art, the invention has the beneficial effects that: the four-wheel dynamic positioning wheelbase measurement device can locate the dynamic position of the four-wheel axles and measure the four-wheel wheelbase, and the measurement accuracy is high. The follower wheel positioning platform is easy to lock and unlock; the two limit shafts cooperate with the limit holes to limit the range of the follower's horizontal follow-up; the two limit screws not only ensure the follow-up of the follower flexibly, but also limit the The upward movement of the moving seat. The structure of the fixed wheel alignment table is simple and practical. The wheel driving assembly has a simple structure and is convenient to drive. The brake block brakes the electric drum and the driven drum so that the vehicle wheels do not slip when driving up or down the wheel track. The displacement sensor measures accurately and is easy to connect with the controller to calculate the wheelbase. The upper frustum-shaped hole facilitates the insertion of the locking rod into the lower frusto-conical hole for locking. The unlocking and locking status of the first unlocking cylinder can be detected by the photoelectric sensor and the detection block.

Description of drawings

Fig. 1 is a kind of structural representation of the present invention;

Fig. 2 is a structural schematic diagram of a follower wheel positioning platform and a wheel drive assembly;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is a B-B sectional view of Fig. 2 .

In the figure: displacement sensor-1, fixed hoop-2, wheel track-3, bracket-31, fixed wheel positioning platform-4, fixed platen-41, underframe-42, follower wheel positioning platform-5, hinged shaft -51, follower seat-52, ball-53, base-54, locking shaft-55, rotating arm-56, sector gear-57, driving arm-58, first unlocking cylinder-59, mounting plate-510, Second unlocking cylinder-511, frustum-shaped locking head-512, locking rod-513, limit cylinder-514, limit shaft-515, limit screw-516, nut-517, connecting frame-518, photoelectric sensor -519, detection block-520, through hole-521, limit hole-522, horizontal positioning plate-523, isosceles trapezoidal bump-524, locking groove-525, lower frustum-shaped hole-526, upper frustum-shaped hole -527, wheel drive assembly-6, side plate-61, support seat-62, electric drum-63, driven drum-64, brake cylinder-65, brake block-66.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4: a kind of four-wheel dynamic positioning wheelbase measuring device comprises two wheelways 3 provided with brackets 31, and one wheelway 3 is provided with Fixed wheel positioning platform 4 and a follower wheel positioning platform 5, two follower wheel positioning platforms 5 provided on the other wheel track 3, three each are opposite to a follower wheel positioning platform 5 and connected to the bracket 31 Components, four wheel drive assemblies 6; one wheel drive assembly 6 is connected to the fixed wheel alignment platform 4; the other three wheel drive assemblies 6 are each connected to a follower wheel alignment platform 5.

The follower wheel positioning platform 5 includes a follower seat 52 with two articulated shafts 51 at the lower end, four bases 54 supporting the balls 53 of the follower seat 52 at the upper end, and a clamp at each end of the two. Lock shaft 55 and each hinged shaft 51 through bearing articulated rotating arm 56, two sector gears 57 that are meshed with each other and each screwed to the other end of a rotating arm 56, and one end is integrated with one end of a rotating arm 56 to form a connection The driving arm 58 is hinged with the base 54 and the cylinder rod is hinged with the other end of the driving arm 58. The first unlocking cylinder 59 is provided with a frustum-shaped locking hole on the upper surface and is connected with the mounting plate 510 screwed to the outside of the base 54. The second unlocking cylinder 511 connected by the moving seat 52 is screwed, the lower end is provided with a truncated conical locking head 512 matched with the truncated conical locking hole and the locking rod 513 whose upper end is threadedly connected with the cylinder rod of the second unlocking cylinder 511, two The limit cylinder 514 that is screwed with the mounting plate 510 respectively, two limit shafts 515 that are threadedly connected with the cylinder rod of a limit cylinder 514, two limit screws 516, two nuts 517, and the first unlocking cylinder 59 connected connecting frame 518, two photoelectric sensors 519 connected with connecting frame 518, detection block 520 connected with one end of a rotating arm 56; follower seat 52 is provided with two through holes whose diameter is greater than the limit screw rod 516 diameter 521 and the relative limit hole 522 with two limit shafts 515; the width of the limit hole 522 is greater than the diameter of the limit shaft 515; the length of the limit hole 522 is greater than the distance between the two limit shafts 515 towards the outside; One end of the screw rod of each limit screw 516 passes through a through hole 521 and mounting plate 510 and is threadedly connected with a nut 517; Base 54 is provided with horizontal positioning plate 523; The isosceles trapezoidal projection 524; the transverse positioning plate 523 is provided with two locking grooves 525 respectively located on both sides of the isosceles trapezoidal projection 524 and the width of which is in clearance fit with the locking shaft 55. Described truncated cone-shaped locking hole comprises the lower truncated-conical-shaped hole 526 that matches locking bar 513 and the upper truncated-conical-shaped hole 527 that the small end is connected with the big end of lower truncated-conical-shaped hole 526; The taper angle of the lower frustoconical hole 526.

The fixed wheel alignment platform 4 includes a fixed platform 41 and an underframe 42 screwed to the fixed platform 41 .

In this embodiment, the wheel drive assembly 6 includes a supporting seat 62 with two side plates 61, a motor drum 63 with a motor and each of the two ends of which is pivotally connected to a side plate 61 through a bearing, and the motor drum 63 The driven roller 64 arranged in parallel and pivotally connected to a side plate 61 at both ends through bearings, the brake cylinder 65 located below the electric roller 63 and the driven roller 64 and screwed to the follower seat 52 or the fixed platen 41 is located at Between the electric drum 63 and the driven drum 64 is a brake block 66 that is threadedly connected with the cylinder rod of the brake cylinder 65; the material of the brake block 66 is rubber.

The measuring assembly includes a displacement sensor 1 where the measuring rod is opposite to the follower seat 52 , and two fixing hoops 2 that press the displacement sensor 1 and are screwed to the bracket 31 .

When this four-wheel dynamic positioning wheelbase measurement device is in use, the wheels on both sides of the automobile to be detected are driven on two wheel tracks 3 respectively, and one wheel is positioned on the electric drum 63 and the driven drum 64 on the fixed wheel alignment platform 4, and the other Each of the three wheels has a follower wheel positioning platform 5 on the electric drum 63 and the driven drum 64; the cylinder rods of the two limit cylinders 514 push the two limit shafts 515 into the limit holes 522, and the first unlock The cylinder 59 pulls the driving arm 58 to drive a rotating arm 56 to rotate, so that a locking shaft 55 is disengaged from the locking groove 525, and at the same time drives the other rotating arm 56 to rotate through two sector gears 57, so that the other locking shaft 55 is disengaged from the locking Slot 525; the second unlocking cylinder 511 pulls the locking rod 513 to break away from the frustum-shaped locking hole; the four electric drums 63 each start to drive a wheel and a driven drum 64 to rotate, and the positions of the electric drum 63 and the driven drum 64 are corresponding to the wheels. Adapt to and drive the follower seat 52 to follow the positioning, measure the displacement of each follower seat 52 through the displacement sensor 1 and measure the wheelbase through calculation; after the measurement is completed, the cylinder rods of the two limit cylinders 514 pull the two limit shafts 515 Reset, the first unlocking cylinder 59 promotes the driving arm 58 to drive a pivoting arm 56 to rotate, so that a locking shaft 55 snaps into the locking groove 525 and locks, and simultaneously drives the other pivoting arm 56 to rotate through two sector gears 57, so that the other A locking shaft 55 is inserted into the locking groove 525 for locking; the second unlocking cylinder 511 pushes the locking rod 513 into the frustum-shaped locking hole for locking.

The beneficial effect of the present invention is: the four-wheel dynamic positioning wheel base measurement device can locate the dynamic position of the four-wheel axle and measure the four-wheel wheel base, and the measurement accuracy is high. The follower wheel positioning platform is easy to lock and unlock; the two limit shafts cooperate with the limit holes to limit the range of the follower's horizontal follow-up; the two limit screws not only ensure the follow-up of the follower flexibly, but also limit the The upward movement of the moving seat. The structure of the fixed wheel alignment table is simple and practical. The wheel driving assembly has a simple structure and is convenient to drive. The brake block brakes the electric drum and the driven drum so that the vehicle wheels do not slip when driving up or down the wheel track. The displacement sensor measures accurately and is easy to connect with the controller to calculate the wheelbase. The upper frustum-shaped hole facilitates the insertion of the locking rod into the lower frusto-conical hole for locking. The unlocking and locking status of the first unlocking cylinder can be detected by the photoelectric sensor and the detection block.

It will be obvious to those skilled in the art that the present invention may be modified in various ways and such modifications are not to be regarded as departing from the scope of the present invention. All such modifications obvious to those skilled in the art are intended to be included within the scope of this claim.

Claims (6)

1. a four-wheel dynamically positions wheelbase measuring device, it is characterized in that: include that two set standoff wheel, a fixing vehicle wheel positioning table that one Ge Lun road is provided with and a servo-actuated wheel positioning table, another takes turns the servo-actuated wheel positioning table of two be provided with, three respectively with a servo-actuated wheel positioning table measurement assembly that is relative and that be connected with support, four wheel driving assemblies；One wheel driving assembly is connected with fixing vehicle wheel positioning table；nullThe other three wheel driving assembly is respectively connected with a servo-actuated wheel positioning table，Described servo-actuated wheel positioning table includes that lower end is provided with the servo-actuated seat of two jointed shafts，Upper end is provided with the base of several balls supporting servo-actuated seat，Two one end are respectively provided with a card lock shaft the pivoted arm the most hinged with a jointed shaft，Two sector gears engaged each other and be respectively connected with the other end of a pivoted arm，The driving arm that one end is connected with one end of a pivoted arm，The first solution lock cylinder that and cylinder rod hinged with base is hinged with the other end of driving arm，Upper surface is provided with taper type locking hole the installing plate being connected with chassis outer side，The the second solution lock cylinder being connected with servo-actuated seat，Lower end is provided with the check lock lever that the taper type locking head with taper type locking hole coupling and upper end are connected with the cylinder rod of the second solution lock cylinder，Two limiting cylinders being connected with installing plate respectively，Two limit shafts being respectively connected with the cylinder rod of a limiting cylinder，Two Limit screws and two nuts；Servo-actuated seat is provided with two diameters and is more than the through hole of Limit screw diameter and the spacing hole relative with two limit shafts；The width of spacing hole is more than the diameter of limit shaft；The length of spacing hole more than two limit shafts the most laterally between distance；One end of the screw rod of two Limit screws respectively passes a through hole and installing plate and a nut thread connects；Base is provided with horizontal location-plate；One side of horizontal location-plate is provided with small end and is positioned at the isosceles trapezoid projection in outside；Horizontal location-plate is provided with two and lays respectively at the latch groove that isosceles trapezoid projection both sides and width mate with card lock shaft.

Four-wheel the most according to claim 1 dynamically positions wheelbase measuring device, it is characterized in that: described fixing vehicle wheel positioning table includes stationary platen and the underframe being connected with stationary platen.

Four-wheel the most according to claim 2 dynamically positions wheelbase measuring device, it is characterized in that: described wheel driving assembly includes being provided with a bearing of two side plates, it is provided with each motorized pulleys with a side plate pivot joint in motor and two ends and be arranged in parallel with motorized pulleys and each follower rollers with a side plate pivot joint in two ends, it is positioned at the brake cylinder being connected below motorized pulleys and follower rollers and with servo-actuated seat or stationary platen, the brake shoes being connected between motorized pulleys and follower rollers and with the cylinder rod of brake cylinder.

4. dynamically position wheelbase measuring device according to the four-wheel described in claim 1 or 2 or 3, it is characterized in that: described assembly of measuring includes measuring the displacement transducer that bar is relative with servo-actuated seat, pushes down displacement transducer the clips being connected with support for two.

5. dynamically position wheelbase measuring device according to the four-wheel described in claim 1 or 2 or 3, it is characterized in that: what described taper type locking hole included the lower taper type hole with check lock lever coupling and small end and lower taper type hole holds greatly the upper taper type hole being connected；The cone angle in upper taper type hole is more than the cone angle in lower taper type hole.

6. dynamically position wheelbase measuring device according to the four-wheel described in claim 1 or 2 or 3, it is characterized in that: described servo-actuated wheel positioning table also includes solving, with first, the link that lock cylinder is connected, two photoelectric sensors being connected with link, the detection block being connected with one end of a pivoted arm.