CN101109666A - Measuring mechanism for assembling and press-loading vehicle main reducing gear - Google Patents
Measuring mechanism for assembling and press-loading vehicle main reducing gear Download PDFInfo
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- CN101109666A CN101109666A CNA2007101311101A CN200710131110A CN101109666A CN 101109666 A CN101109666 A CN 101109666A CN A2007101311101 A CNA2007101311101 A CN A2007101311101A CN 200710131110 A CN200710131110 A CN 200710131110A CN 101109666 A CN101109666 A CN 101109666A
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Abstract
The invention provides a measuring mechanism for the pressure assembling of the main reducers of automobiles, which comprises a friction torque tester for the bearing seat of a main gear assembly and an upper bearing inner ring pressure-assembling mechanism, and is characterized in that the bearing seat friction torque tester takes a servo motor as a drive. The friction torque of a main gear assembly to be measured is transmitted in sequence through the rotation of the bearing seat to a drive fork, a drive disc, a synchronous belt wheel II, a synchronous belt wheel I and a torque sensor, thereby the torque necessary for rotating the bearing seat of the main gear is transmitted to a rotary torque sensor, and a frequency signal is formed; by data acquisition treatment, real-time torque of the bearing seat can be obtained. The invention is for detecting the friction torque of the main gear assembly while pressure assembling the inner ring of the upper bearing of the main gear assembly of the main reducer of an automobile, and realizes automatic measurement of small torque. Measuring the friction torque of the main gear assembly can check whether the selection of the shim in previous station is correct, and effectively improve the quality and efficiency in assembling the main reducers of drive axles of automobiles.
Description
Technical field:
The present invention relates to press-fiting and the measurement of main tooth assembly moment of friction of automobile drive axle main reducing gear fit on taper roll bearing inner ring, realize the automatic measurement of little moment of torsion.
Background technology:
Automobile drive axle is the important big assembly of automobile, it is positioned at the art end of automotive transmission, it is to increase by transmission shaft or the direct torque of being transmitted by variator that its basic training is used, it is assigned to the left and right driving wheel, and makes the left and right driving wheel have the desired differential function of running car kinematics; Bearing loading and ground give through suspension through wheel, vehicle frame or monocoque body on the fully loaded spring of automobile plummet power, longitudinal force, transverse force and moment thereof simultaneously, and shock load.In general vehicle structure, drive axle comprises the gearing and the axle housing of main reducing gear, differential mechanism, drive wheels.Wherein the effect of main reducing gear is that power with variator further slows down and changes its direction of transfer and passes to left and right wheel, and the effect of differential mechanism is to satisfy driving wheels inharmonic requirement on the kinematics of travelling, and their assembly quality has directly influenced whole drive axle performance.
The assembly quality of automobile axle main reducing gear is limited by several factors, and one of them important factor is whether master, passive spiral bevel gear mesh well.In order to improve the support stiffness of main gear shaft, particularly axial rigidity, to guarantee the works fine state of back axle gear and bearing, require the main gear shaft nut satisfying under the pre-fastening moment condition of technological requirement, the main gear shaft bearing should have suitable pre-fastening moment.Therefore, except that requiring Assembly part (comprising bearing seat, bearing, main gear shaft, spacer etc.) all to reach the quality control standard separately, must be on the correct basis of selecting the spacer spacer thickness pressing bearing, detect main tooth assembly moment of friction, and when eliminating main gear shaft end play, reach the pre-fastening moment of setting.
At present, most of producer detects whether reach setting moment with torque spanner after remaining and tightening set nut, but its process is loaded down with trivial details, rework rate is high, inefficiency.
Summary of the invention:
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of measuring mechanism for assembling and press-loading vehicle main reducing gear is provided, be used for when automobile main reducer master tooth assembly head bearing inner ring press-fits, detecting main tooth assembly moment of friction, realize the automatic measurement of little moment of torsion.By detecting main tooth assembly moment of friction, whether accurate to check a last station pad to select, the assembly quality and the efficiency of assembling of raising automobile drive axle main reducing gear.
The technical scheme that technical solution problem of the present invention is adopted is:
The present invention includes main tooth assembly bearing seat moment of friction testing agency and head bearing inner ring press-loading device, its design feature is:
Described bearing seat moment of friction testing agency is to be drive source with the servomotor, speed reduction unit and dynamic torque sensor are set between drive source and output mechanism, the strain axis of torque sensor stretches out at two ends, the two ends strain axis connects with the output terminal of speed reduction unit and the axle of connection synchronous pulley I mutually by flat key respectively, the synchronous band that realization speed and moment of torsion transmit is set between synchronous pulley I and synchronous pulley II, below synchronous pulley II dial is set, the below of dial is connected with the flexible shift fork in the bolt hole that reaches bearing seat when measuring;
Described bearing inner race press-loading device is on double action hydraulic press, coaxial from top to bottom set gradually load sensor, on fixedly pressure head, be used to press-fit the last interchangeable pressure head of head bearing inner ring, but and be placed on the piston rod of lifting the push-down head of going up, be used to support main tooth assembly, wherein, on fixedly pressure head pass from the middle circular hole of synchronous pulley II.
Design feature of the present invention also is:
Bearing seat moment of friction testing agency realizes linear reciprocating motion on the vertical direction by cylinder.
Below synchronous pulley I, safety clutch is set.
The present invention based on the measuring method that press-fits be:
The main tooth assembly of different cultivars, set nut requires to reach different screw-down torques.The screw-down torque difference of set nut produces different axle pressure F to the head bearing inner ring, and the axial force that produces when the present invention simulates matching requirements by controlling different axial forces, satisfies the requirement of different cultivars.Empirical value according to screw-down torque M calculates F, and F is a pressure required when press-fiting the head bearing inner ring.
R1 represents nut and flange contact position mean radius, the r2 equivalent radius of action of representing to be threaded, the μ 1 expression coefficient of sliding friction.
Main tooth assembly the time also satisfies the moment of friction requirement in assembling, press-fits pressure F different, produces different moment of frictions.Main tooth assembly moment of friction testing agency moment of torsion transmittance process: the rotation of the moment of friction of main tooth assembly to be measured by bearing seat passes to moment of torsion flat key, the flat key on the synchronous pulley I, synchronous pulley axle, the torque sensor on shift fork, dial, the synchronous pulley II successively.Thereby the main pinion bearing is rotated the transmission of torque that needs give rotary torque sensor, form frequency signal, just can obtain its real-time moment through data acquisition process.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention is used for detecting main tooth assembly moment of friction when automobile main reducer master tooth assembly head bearing inner ring press-fits, realizes the automatic measurement of little moment of torsion.By detecting main tooth assembly moment of friction,, effectively improve the assembly quality and the efficiency of assembling of automobile drive axle main reducing gear to check last station pad selection whether accurate.
2, the present invention controls and handles fast, can directly use on assembly line, satisfies technological requirement, and rework rate is low, has improved labour productivity.
Description of drawings:
Fig. 1 is main tooth assembly structure synoptic diagram.
Fig. 2 press-fits measuring mechanism master TV structure synoptic diagram for the present invention.
Fig. 3 press-fits measuring mechanism left side TV structure synoptic diagram for the present invention.
Fig. 4 is press-loading device structural representation under the present invention.
Number in the figure: 1 set nut, 2 flange of cardinal tooth, 3 oil sealings, 4 bearing seats, 5 driving gears, 6 head bearings, 7 are adjusted on pads, 8 lower bearings, 9 spacers, 10 on interchangeable pressure head, the 11 synchronous pulley II, 12 fixedly pressure head, 13 springs, 14 set nuts, 15 clutch sleeves, 16 synchronous pulley I, 17 torque sensors, 18 cylinders, 19 speed reduction units, 20 servomotors, 21 shift forks, 22 line slideways, 23 guide rods, 24 load sensors, 25 piston rods, 26 push-down heads, 27 dials.
Below by embodiment, the invention will be further described in conjunction with the accompanying drawings:
Embodiment:
Referring to Fig. 1, related main tooth assembly comprises set nut 1, flange of cardinal tooth 2, oil sealing 3, bearing seat 4, driving gear 5, head bearing 6, adjusts pad 7, lower bearing 8 and spacer 9 in the present embodiment.
Referring to Fig. 2, bearing seat moment of friction testing agency is to be drive source with servomotor 20, speed reduction unit 19 and dynamic torque sensor 17 are set between drive source and output mechanism, the strain axis of torque sensor 17 stretches out at two ends, the two ends strain axis connects with the output terminal of speed reduction unit 19 and the axle of connection synchronous pulley I 16 mutually by flat key respectively, the synchronous band that realization speed and moment of torsion transmit is set between synchronous pulley I 16 and synchronous pulley II 11, dial 27 is set below synchronous pulley II 11, there is the flexible shift fork 21 in the bolt hole that reaches bearing seat 4 when measuring the below of dial 27 by screw attachment, drive bearing seat 4 with the flexible shift fork 21 that rotates and be rotated, adopt flexible shift fork 21 can avoid shift fork 21 in the process that rotation descends, to damage parts.The steel ball safety clutch is set below synchronous pulley I 16, plays overload protective function, prevent that torque sensor is damaged.Just can change the axial location of clutch sleeve 15 by screw-in or back-out set nut 14, thereby change the pretightning force of spring 13, so just can adjust the overload torque of safety clutch.
Referring to Fig. 2, Fig. 3 and Fig. 4, the bearing inner race press-loading device is on double action hydraulic press, coaxial from top to bottom set gradually load sensor 24, on fixedly pressure head 12, be used to press-fit the last interchangeable pressure head 10 of head bearing inner ring, but and be placed on the piston rod of lifting on 25, be used to support the push-down head 26 of main tooth assembly.Wherein, on fixedly pressure head 12 pass from the middle circular hole of synchronous pulley II 11.Led by guide rod 23 in the motion of vertical direction in whole press-loading device top.
In concrete the enforcement, the motion of bearing seat moment of friction testing agency is to be power source, to be guiding mechanism with line slideway 22 that with cylinder 18 in the vertical direction does reciprocating linear motion.
Concrete maneuverability pattern at the present embodiment measuring mechanism is as follows:
A, push-down head is put into piston rod, the main tooth assembly of unassembled oil sealing, flange of cardinal tooth, set nut is put into push-down head.
B, go up interchangeable pressure head and put into fixedly pressure head, on fixedly pressure head drop to the nextly, push-down head rises to upper, with corresponding pressure pressurize a period of time.
C, cylinder drive whole measuring mechanism and descend, and shift fork is the next along with measuring mechanism is moved down into, and servomotor drives the synchronous pulley rotation simultaneously.Shift fork reaches in the bolt hole of bearing seat 4 in the process of rotation that descends, and drives bearing seat 4 rotations, obtains the moment of friction of main tooth assembly under this pressure.
D, cylinder are got back to upper, and seaming chuck rises to upper, and push-down head drops to the next, finish once to press-fit measurement.
Claims (3)
1. measuring mechanism for assembling and press-loading vehicle main reducing gear comprises main tooth assembly bearing seat moment of friction testing agency and head bearing inner ring press-loading device, it is characterized in that:
Described bearing seat moment of friction testing agency is to be drive source with servomotor (20), speed reduction unit (19) and dynamic torque sensor (17) are set between drive source and output mechanism, the strain axis of torque sensor (17) stretches out at two ends, the two ends strain axis connects with the output terminal of speed reduction unit (19) and the axle of connection synchronous pulley I (16) mutually by flat key respectively, the synchronous band that realization speed and moment of torsion transmit is set between synchronous pulley I (16) and synchronous pulley II (11), in the below of synchronous pulley II (11) dial (27) is set, the below of dial (27) is connected with the flexible shift fork (21) in the bolt hole that reaches bearing seat (4) when measuring;
Described bearing inner race press-loading device is on double action hydraulic press, coaxial from top to bottom set gradually load sensor (24), on fixedly pressure head (12), be used to press-fit the last interchangeable pressure head (10) of head bearing inner ring, and be placed in the push-down head (26) that main tooth assembly was gone up, was used to support in (25) but on the piston rod of lifting, wherein, on fixedly pressure head (12) pass from the middle circular hole of synchronous pulley II (11).
2. measuring mechanism for assembling and press-loading vehicle main reducing gear according to claim 1 is characterized in that described bearing seat moment of friction testing agency realizes linear reciprocating motion on the vertical direction by cylinder (18).
3. measuring mechanism for assembling and press-loading vehicle main reducing gear according to claim 1 is characterized in that in described synchronous pulley I (16) below safety clutch being set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101311101A CN100510669C (en) | 2007-08-22 | 2007-08-22 | Measuring mechanism for assembling and press-loading vehicle main reducing gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101311101A CN100510669C (en) | 2007-08-22 | 2007-08-22 | Measuring mechanism for assembling and press-loading vehicle main reducing gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109666A true CN101109666A (en) | 2008-01-23 |
| CN100510669C CN100510669C (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101311101A Expired - Fee Related CN100510669C (en) | 2007-08-22 | 2007-08-22 | Measuring mechanism for assembling and press-loading vehicle main reducing gear |
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| CN (1) | CN100510669C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979976A (en) * | 2010-11-09 | 2011-02-23 | 大连德新机电技术工程有限公司 | Hub main nut screwing and bearing pre-tightening force measuring machine and using method thereof |
| CN102248359A (en) * | 2011-04-22 | 2011-11-23 | 柳州市龙杰汽车配件有限责任公司 | Method for manufacturing belt pulley with a bearing |
| CN102721500A (en) * | 2012-05-16 | 2012-10-10 | 电子科技大学 | Handheld measuring device for detecting starting friction torque and circuit system thereof |
| CN102721499A (en) * | 2012-05-16 | 2012-10-10 | 电子科技大学 | Device for detecting startup friction torque with restraints on speed influence, and circuit system thereof |
| CN103308238A (en) * | 2013-06-21 | 2013-09-18 | 吉林大学 | Torque controllable accident vehicle braking force detecting device |
| CN105058035A (en) * | 2015-08-05 | 2015-11-18 | 安徽巨一自动化装备有限公司 | Twisting and measuring machine for main cone nut of drive axle assembly |
| CN107664547A (en) * | 2016-07-29 | 2018-02-06 | 长城汽车股份有限公司 | The test device and method of vehicle main retarder spacer load |
| CN108332700A (en) * | 2018-04-03 | 2018-07-27 | 银川威力传动技术股份有限公司 | A kind of bearing sideshake detection device |
| CN109443625A (en) * | 2018-12-03 | 2019-03-08 | 杨培佩 | One kind tightening measuring moment equipment |
| CN109780179A (en) * | 2019-01-08 | 2019-05-21 | 一汽解放汽车有限公司 | A kind of commercial vehicle main cone bearing pre-tightening structure and its Method of Adjustment |
| CN113418701A (en) * | 2021-07-20 | 2021-09-21 | 上海人本精密机械有限公司 | Auxiliary device for detecting friction torque of precise angular contact bearing and testing machine thereof |
-
2007
- 2007-08-22 CN CNB2007101311101A patent/CN100510669C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979976A (en) * | 2010-11-09 | 2011-02-23 | 大连德新机电技术工程有限公司 | Hub main nut screwing and bearing pre-tightening force measuring machine and using method thereof |
| CN102248359A (en) * | 2011-04-22 | 2011-11-23 | 柳州市龙杰汽车配件有限责任公司 | Method for manufacturing belt pulley with a bearing |
| CN102248359B (en) * | 2011-04-22 | 2013-06-05 | 柳州市龙杰汽车配件有限责任公司 | Method for manufacturing belt pulley with a bearing |
| CN102721500A (en) * | 2012-05-16 | 2012-10-10 | 电子科技大学 | Handheld measuring device for detecting starting friction torque and circuit system thereof |
| CN102721499A (en) * | 2012-05-16 | 2012-10-10 | 电子科技大学 | Device for detecting startup friction torque with restraints on speed influence, and circuit system thereof |
| CN102721500B (en) * | 2012-05-16 | 2014-02-26 | 电子科技大学 | Handheld measuring device for detecting starting friction torque and circuit system thereof |
| CN102721499B (en) * | 2012-05-16 | 2014-02-26 | 电子科技大学 | Device for detecting startup friction torque with restraints on speed influence, and circuit system thereof |
| CN103308238A (en) * | 2013-06-21 | 2013-09-18 | 吉林大学 | Torque controllable accident vehicle braking force detecting device |
| CN105058035A (en) * | 2015-08-05 | 2015-11-18 | 安徽巨一自动化装备有限公司 | Twisting and measuring machine for main cone nut of drive axle assembly |
| CN105058035B (en) * | 2015-08-05 | 2017-05-10 | 安徽巨一自动化装备有限公司 | Twisting and measuring machine for main cone nut of drive axle assembly |
| CN107664547A (en) * | 2016-07-29 | 2018-02-06 | 长城汽车股份有限公司 | The test device and method of vehicle main retarder spacer load |
| CN108332700A (en) * | 2018-04-03 | 2018-07-27 | 银川威力传动技术股份有限公司 | A kind of bearing sideshake detection device |
| CN109443625A (en) * | 2018-12-03 | 2019-03-08 | 杨培佩 | One kind tightening measuring moment equipment |
| CN109780179A (en) * | 2019-01-08 | 2019-05-21 | 一汽解放汽车有限公司 | A kind of commercial vehicle main cone bearing pre-tightening structure and its Method of Adjustment |
| CN113418701A (en) * | 2021-07-20 | 2021-09-21 | 上海人本精密机械有限公司 | Auxiliary device for detecting friction torque of precise angular contact bearing and testing machine thereof |
| CN113418701B (en) * | 2021-07-20 | 2023-05-09 | 上海人本精密机械有限公司 | Friction moment detection testing machine for precise angular contact bearing |
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| Publication number | Publication date |
|---|---|
| CN100510669C (en) | 2009-07-08 |
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