CN100585367C - Accurately subdivided automobile chassis roller test bench flywheel system - Google Patents

Abstract

The invention belongs to automobile performance testing equipment, in particular to a flywheel system of a precisely subdivided automobile chassis roller test bench. Its purpose is to overcome the existing automobile performance testing equipment inertial flywheel system and its grading method, which have low simulation accuracy and cannot adapt to large-scale vehicle inspections. The test bench flywheel system consists of a main shaft (A), a clutch device (B) , bearing seat device (C), flywheel device (D), shaft coupling (E) and frame device (F), it is characterized in that said main shaft (A) is supported on frame device ( In F), said flywheel device (D) is composed of multiple sets of flywheels with different moments of inertia, each set of flywheels is mounted on the main shaft (A), and each flywheel is connected to a corresponding clutch respectively, said The shaft coupling (E) is mounted on one end of the main shaft (A) and connected with the power source. The classification method of the flywheel group in the system adopts the dichotomy method.

Description

Precisely subdivided formula flywheel set system of automobile chassis roll test bed

Technical field

The invention belongs to the automotive performance checkout equipment, particularly a kind of precisely subdivided formula flywheel set system of automobile chassis roll test bed.Utilize the test of its moment of inertia simulated automotive acceleration resistance realization to acceleration capacity; Kinetic energy when store automobiles is travelled is realized the test to coasting distance, and judges the resistance of automotive transmission and driving system in view of the above; Inertial mass during the simulated automotive road driving realizes that the discharging of automobile under multi-state detects.

Background technology

The stage division of present domestic inertial flywheel group also all has unified regulation, so different stage divisions and arrangement have occurred, flywheel component level is normal adopt two kinds of methods are arranged: first kind of stage division is the tested vehicle close according to quality, design the flywheel of corresponding moment of inertia, this method is at a certain vehicle design flywheel group, so simulation precision is than higher, the flywheel number is also less.But this method can only satisfy the detection requirement of a certain car, can be used as single vehicle scientific research and uses, and can't on detection line hundreds of kind vehicle be used, and second kind of stage division is according to tested vehicle mass range m _Min-m _Max, determine required flywheel group simulation moment of inertia scope J by formula _Min～J _Max, with a flywheel J _cCome simulated automotive translation gross m _Min, determine the compensation flywheel J of several different moment of inertia again according to the quality of several frequently seen vehicle _i, finally utilize basic flywheel J _cWith compensation flywheel J _iThe combination translation inertia of simulating various vehicles.Facts have proved that above method simulated automotive quality is all not accurate enough, comparatively rough.

Summary of the invention

The objective of the invention is for overcoming existing automotive performance checkout equipment inertial flywheel group system and stage division simulation precision thereof not high, can not adapt to shortcomings such as Automobile Detection in enormous quantities, provide a kind of simple in structure, institute takes up space little, the precisely subdivided formula flywheel set system of automobile chassis roll test bed that simulation precision is high and the stage division of flywheel group thereof.

The object of the present invention is achieved like this, and accompanying drawings is as follows:

A kind of precisely subdivided formula flywheel set system of automobile chassis roll test bed is made up of principal axis A, clutch apparatus B, bearing holder device C, flywheel gear D, shaft coupling E and frame mounting F, said principal axis A is supported on the frame mounting F by bearing holder device C, said flywheel gear D is made up of the different flywheel of many covers moment of inertia, every cover flywheel all is contained on the principal axis A, and each flywheel wherein is connected with corresponding clutch coupling respectively, and the end that said shaft coupling E is contained in principal axis A is connected with power source.

Said principal axis A is made up of axle 1 and long key 2, and long key 2 is fixed on the axle 1.

Said clutch apparatus B is made up of the slipping toothed electromagnetic clutch and the brushgear that are sleeved on the principal axis A, or adopts the induction electromagnetic clutch device of no slip-ring brush.

Said slipping toothed electromagnetic clutch is made up of yoke 3, dead ring 4, slip ring 5, coil 6, ring gear 7, combination gear ring 8 and retracing spring 9, combination gear ring 8 in the slipping toothed electromagnetic clutch is connected with corresponding flywheel, by yoke 3 and the engagement of ring gear 7 and being connected and disconnection of separating controlling flywheel.

Said brushgear is made up of brush 10, brush bracing frame 11 and brush back up pad 12, and brush 10 is tangent with the slip ring 5 of slipping toothed electromagnetic clutch, and brush 10 is supported by brush bracing frame 11, and is connected together on the brush back up pad 12 by screw.

Said bearing holder device C is made up of bearing with spherical outside surface 13, bearing seat 14 and bearing seat backing plate 15, and bearing with spherical outside surface 13 is embedded in 14 li of bearing seats, places by bearing seat backing plate 15 on the support transverse slat 21 of frame mounting F.

Said frame mounting F supports whole fly wheel system, and support transverse slat 21 wherein, brush support transverse slat 22 and support riser 24 and be separately fixed on the frame 23.

The stage division of the flywheel group in the precisely subdivided formula flywheel set system of automobile chassis roll test bed provided by the invention adopts dichotomy, and the expression formula of simulated automotive moving-mass is:

$m_v=\frac{m_w}{2}(a_{n-1}+\frac{a_{n-2}}{2}+\frac{a_{n-3}}{2^2}+...+\frac{a_{n-j}}{2^{n-j}}+...+\frac{{\mathrm{<figure-callout\; id="1"\; label="a"\; filenames="C2007100555250007H1.png,C2007100555250008H1.png"\; state="\{\{state\}\}">a</figure-callout>}}_1}{2^{n-2}}+\frac{a_0}{2^{n-1}});$

In the formula: m _vThe car mass that-simulation is detected;

m _w-equipment allows the maximum car mass in the simulation car weight scope;

a _N-i-Di i divided flywheel from the controlled quentity controlled variable that combines (0 or 1), n=9, i=1～9, j=9～1.

This method is that a kind of stage division of flywheel group of new automobile chassis dynamometer is: it is according to the maximal translation quality m of tested vehicle _Max, calculate the maximum rotation inertia J that needs simulation by formula _MaxDetermine Rotary Inertia of Flywheel by dichotomy then.The moment of inertia that is first order flywheel is decided to be 1/2J _Max, the moment of inertia of second level flywheel is decided to be 1/4J _Max, the moment of inertia of third level flywheel is 1/8J _Max, until satisfying the measuring accuracy requirement, the present invention uses nine grades of flywheels altogether, and the moment of inertia of the 9th grade of flywheel is 1/512J _MaxTo the detection that every kind of vehicle and the different vehicle of load-carrying carry out, the reasonable combination of available flywheel group realizes that its minimum simulation mass incremental is 20kg, and promptly the maximum error of analog-quality and actual mass is ± 10kg.As seen, the original relatively hierarchical approaches of this hierarchical approaches has higher simulation precision.

Table one is the parameter of nine flywheels;

The flywheel numbering	Flywheel diameter (mm)	Moment of inertia (kgm 2)	Analog-quality (t)
				1	1000	162.2	5.12
2	1000	81.1	2.56
				3	1000	40.55	1.28
4	1000	20.275	0.64
				5	750	10.14	0.32
6	750	5.07	0.16
				7	500	2.535	0.08
8	500	1.267	0.04
				9	500	0.634	0.02

The present invention utilizes the test of its system's moment of inertia simulated automotive acceleration resistance realization to acceleration capacity; Kinetic energy when store automobiles is travelled is realized the test to coasting distance, and judges the resistance to rolling of automotive transmission resistance and driving system in view of the above; Utilize flywheel group store kinetic energy to discharge, with check car deceleration performance to detent; Inertial mass when this system simulation trap for automobile travels realizes the accurate detection of the discharging of automobile under multi-state.The present invention determines the simulating flywheel inertial mass according to conservation of energy principle, use the solution of robotization control device and match flywheel automatically by car weight, realize accurately coupling analog-quality, simulate in the scope of detected car mass 500～10500kg, realize 512 grades of segmentation, the minimum simulation in segmentation back mass incremental is 20kg, has improved order of magnitude of simulation precision than prior art.It adopts dichotomy to carry out classification to fly wheel system, on the structure with nine flywheels of an equal diameter main shaft support, the combination of controlling flywheel with the clutch coupling of slipping toothed electromagnetic clutch or other pattern automatically with separate.The present invention and the difference of flywheel group in the past be, this project organization is simple, and institute takes up space little, saves the space more than 50%; Main shaft adopts the two point form supporting way, has avoided main shaft to cross the problem of location, has reduced the resistance of system own, has improved measuring accuracy.

Description of drawings

Fig. 1 is precisely subdivided formula flywheel set system of automobile chassis roll test bed synoptic diagram;

Fig. 2 is the main shaft synoptic diagram;

Fig. 3 is the slipping toothed electromagnetic clutch cut-open view;

Fig. 4 is the brushgear synoptic diagram;

Fig. 5 is the bearing holder device synoptic diagram;

Fig. 6 is bearing with spherical outside surface figure;

Fig. 7 is the flywheel gear cut-open view;

Fig. 8 is that clutch coupling and flywheel gear even assemble synoptic diagram;

Fig. 9 is the shaft coupling synoptic diagram;

Figure 10 is the frame mounting synoptic diagram;

Figure 11 is the total figure cut-open view of assembling;

Among the figure: 1. 2. long key 3. yokes 4. dead rings 5. slip rings 6. coils 7. ring gears 8. combination gear rings 9. retracing springs 10. brushes 11. brush bracing frames 12. brush back up pads 13. bearing with spherical outside surfaces 14. bearing seats 15. bearing seat backing plates 16. flywheels 17. bearings 18. stop collars 19. bearing holder (housing, cover)s 20. shaft coupling 21. supports transverse slat 22. brushes and supports transverse slat 23. frames 24. support risers 25. axle sleeves 26. hubcaps

A. main shaft B. clutch apparatus C. bearing holder device D. flywheel gear E. shaft coupling F. frame mounting

Embodiment

The embodiment that provides below in conjunction with accompanying drawing is described in further detail structure of the present invention.

With reference to Fig. 1, a kind of novel precisely subdivided formula flywheel set system of automobile chassis roll test bed, it is characterized in that forming by principal axis A, clutch apparatus B, bearing holder device C, flywheel gear D, shaft coupling E and frame mounting F, principal axis A is supported on the frame mounting F by two bearing seats, each flywheel among the flywheel gear D is connected with corresponding clutch coupling respectively, realizes the connection and the disconnection of flywheel.

With reference to Fig. 2, described principal axis A is made up of axle 1 and long key 2.Axle 1 is isometrical logical keyway, and reason is: if adopt multidiameter, need three axles at least, middle driving member increases, and has reduced the precision of measuring, and adopts logical keyway to be easy to assembling and location.

With reference to Fig. 3,4, described clutch apparatus B is made up of slipping toothed electromagnetic clutch and brushgear, slipping toothed electromagnetic clutch is by yoke 3, dead ring 4, slip ring 5, coil 6, ring gear 7, combination gear ring 8 and retracing spring 9 are formed, slipping toothed electromagnetic clutch is enclosed within on the principal axis A, combination gear ring 8 is connected with corresponding flywheel, by yoke 3 and the engagement of ring gear 7 and being connected and disconnection of separating controlling flywheel, brushgear is by brush 10, brush bracing frame 11, form with brush back up pad 12, brush 10 is supported by brush bracing frame 11, and be connected together on the brush back up pad 12 by screw, the electric current that makes the clutch coupling combination is provided by brush 10.Slipping toothed electromagnetic clutch device center brush 10 is tangent with the slip ring 5 of slipping toothed electromagnetic clutch.

With reference to Fig. 5,6, described bearing holder device C bottom bracket 14 is located in by bearing seat backing plate 15 and supports on the transverse slat 21.

With reference to Fig. 7,8, described flywheel gear D is made up of the different flywheel gear of nine cover moment of inertia, every cover all is made up of flywheel 16, bearing 17, stop collar 18 and bearing holder (housing, cover) 19, two bearings 17 are housed on the bearing holder (housing, cover) 19, the axial location of 16, two stop collars of common carrying flywheel, 18 restriction bearings.Flywheel 16 1 sides are connected with combination gear ring 11.

With reference to Figure 10, described frame mounting F is by supporting transverse slat 21, brush support transverse slat 22, frame 23 and supporting riser 24 and form.Support transverse slat 21, brush support transverse slat 22 and support riser 24 and be connected on the frame 23.Support transverse slat 21 supporting bearing base and whole fly wheel system, brush supports transverse slat 22 and supports brushgear, supports the support strength that riser 24 is used to strengthen whole frame.

With reference to Figure 11,26 pairs of flywheels of axle sleeve 25 and hubcap and clutch coupling carry out axial location.

The method of work that adopts the present invention to detect is: the gross mass of measuring vehicle at first, then automobile is sailed on the cylinder of chassis dynamometer, and calculate flywheel to be selected by control system.By combining of slipping toothed electromagnetic clutch control flywheel and axle, required flywheel is rotated under the drive of axle, thus the kinetic energy when simulated automotive moves.Detect needed detection limit.

Claims (5)

1. A precisely subdivided automobile chassis roller test bench flywheel system, which consists of a main shaft (A), a clutch device (B), a bearing seat device (C), a flywheel device (D), and a coupling (E) It is composed of a frame device (F), the said main shaft (A) is supported on the frame device (F) through a bearing seat device (C), and the said flywheel device (D) is composed of multiple sets of flywheels with different moment of inertia, Each set of flywheels is installed on the main shaft (A), and each of the flywheels is respectively connected to the corresponding clutch, and the said coupling (E) is installed on one end of the main shaft (A) to connect with the power source, and it is characterized in that Said main shaft (A) is made up of shaft (1) and long key (2), and shaft (1) is the equal diameter through keyway, and long key (2) is fixed on the shaft (1); Said bearing housing device ( C) It consists of an outer spherical bearing (13), a bearing seat (14) and a bearing seat backing plate (15). The outer spherical bearing (13) is embedded in the bearing seat (14), and placed On the supporting horizontal plate (21) of frame device (F); said frame device (F) supports the whole flywheel group system, wherein supporting horizontal plate (21), brush supporting horizontal plate (22) and supporting vertical plate ( 24) are respectively fixed on the frame (23). 2. The precisely subdivided automobile chassis roller test bench flywheel system according to claim 1, characterized in that said clutch device (B) is composed of a toothed electromagnetic clutch and an electric clutch set on the main shaft (A). Composed of brush devices, or electromagnetic induction electromagnetic clutch devices without slip ring brushes. 3. The accurately subdivided automobile chassis roller test bench flywheel system according to claim 2 is characterized in that the coupling gear ring (8) in the jaw electromagnetic clutch is connected with the corresponding flywheel, and the magnetic yoke The engagement and separation of (3) and ring gear (7) control the connection and disconnection of the flywheel. 4. The precisely subdivided automobile chassis roller test bench flywheel system according to claim 3, characterized in that said brush device consists of a brush (10), a brush support frame (11) and a brush support plate (12), the electric brush (10) is tangent to the slip ring (5) of the jaw electromagnetic clutch, the electric brush (10) is supported by the electric brush support frame (11), and is connected to the electric brush support plate together by screws (12) on. 5. According to the accurately subdivided automobile chassis roller test bench flywheel system according to claim 1, the flywheels are graded by dichotomy, and the expression for simulating the movement quality of a car is: ${\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; v</span>}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>\frac{{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>\frac{{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 3</span>}}}{{\mathrm{<span\; class="notranslate">\; 2</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; +</span>\frac{{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; i</span>}}}{{\mathrm{<span\; class="notranslate">\; 2</span>}}^{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; j</span>}}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; +</span>\frac{{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{{\mathrm{<span\; class="notranslate">\; 2</span>}}^{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; +</span>\frac{{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}}{{\mathrm{<span\; class="notranslate">\; 2</span>}}^{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span>$ In the formula: m _v - the mass of the car to be simulated; m _w - the maximum car mass within which the device allows to simulate the car weight range; a _ni - control amount (0 or 1) of separation and combination of the i-th flywheel, n=9, i=1~9, j=9~1.

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