CN102756647A - Device for reducing transmission shaft torsional vibration of special vehicle - Google Patents
Device for reducing transmission shaft torsional vibration of special vehicle Download PDFInfo
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- CN102756647A CN102756647A CN2012102613580A CN201210261358A CN102756647A CN 102756647 A CN102756647 A CN 102756647A CN 2012102613580 A CN2012102613580 A CN 2012102613580A CN 201210261358 A CN201210261358 A CN 201210261358A CN 102756647 A CN102756647 A CN 102756647A
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- transmission shaft
- gear box
- speed gear
- change speed
- midship mounting
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Abstract
The invention relates to a device for reducing transmission shaft torsional vibration of a special vehicle. The special vehicle comprises an engine, as well as a first transmission shaft, a universal coupler, a transmission shaft middle support, a second transmission shaft, a gear box auxiliary support, a gear box and a transfer case which are hung behind the engine, wherein the transmission shaft middle support at least comprises a first middle support, a second middle support and a middle support coupler; through holes are formed in both the first middle support and the second middle support; the middle support coupler penetrates the through holes in the first middle support and the second middle support, so as to form a double-middle support structure for the transmission shafts; and the axial direction angle Alpha between the first transmission shaft and the second transmission shaft is larger than or equal to 1.4 degrees and smaller than or equal to 3.0 degrees. Through the change of the middle support mode of the transmission shafts, breakage is avoided effectively; and the radial run-out of the transmission shafts is also reduced effectively, which has a favorable effect on reducing the transmission shaft torsional vibration.
Description
Technical field
The present invention relates to a kind of mechanism that reduces the transmission shaft torsional oscillation, particularly relate to the device that a kind of special-use vehicle reduces the transmission shaft torsional oscillation.
Background technology
The layout of the cross-country engineering truck power drive system of two bridges is as shown in Figure 1 in the prior art, its mainly by driving engine and suspend 8, first transmission shaft 6 behind the radiator fan 9, flywheel shell of engine 7, driving engine, universal coupling 5, propeller shaft center bearing 4, second transmission shaft 3, change speed gear box supplemental support 2, change speed gear box and auxiliary gear box 1 form.
Before being passed to through two independent axes, the power that power transmission is exported change speed gear box by auxiliary gear box turns to/drive axle and rear driving axle, thus the power transmission of completion vehicle.In the prior art mode of this kind structural arrangement have simple in structure, power transmission efficiency is high, auxiliary gear box and advantage such as change speed gear box is integrated in one, speed change and transmission of power are convenient.But in speed change moment, diametral load and additional bending moment that transmission shaft is suffered are excessive, need reasonably arrange the axial space angle between first transmission shaft 6 and second transmission shaft 3; Simultaneously; Because having relatively high expectations for propeller shaft center bearing 4; Propeller shaft center bearing still receives the main carrier of the diametral load that factors such as transmission shaft out-of-balance force and off-centre cause; Therefore reasonably arrange the axial setting angle between the transmission shaft and select suitable midship mounting for use, significant for the torsional oscillation that reduces to cause with the load counter torque by the transmission shaft diametral load.
Wherein, Acting as of propeller shaft center bearing: during the transmission shaft segmentation midship mounting need be set; Center support is installed on the cross member of frame or on the body understructure usually, with the compensation transmission shafts to the installation error of angle direction and vehicle ' process in because the caused displacements of distortion such as driving engine play or vehicle frames; Extensively adopt the caoutchouc elasticity center support at present, adopt single row ball bearing in its structure, rubber elastic element can absorb the vibration of transmission shaft, reduces noise.
In addition, according to the feedback of existing market, phenomenon of rupture appears in the propeller shaft center bearing of above-mentioned this kind of prior art power transmission arrangment easily, and there is phenomenon of torsional vibration in transmission shaft when high-speed operation.Above-mentioned torsional oscillation is about the calculating of driving system excitation frequency to the natural frequency influence degree; Reflected whether system exists the hazard level of resonance (resonance); Mainly relevant with the rotor inertia and the torsional stiffness of system each component parts; The basic reason that produces torsion oscillations is the active moment of rotating machinery and the lack of equilibrium between the counter torque of loading, and causes the direction of synthetic moment of torsion to change back and forth.
In practical application,, at first be the damaged situation of bearing of inspection propeller shaft center bearing usually to the problem of above-mentioned propeller shaft center bearing fracture; If bearing breakage occurs and then changes bearing,, wearing and tearing then change a whole set of midship mounting device if all appearring in bearing and bearing support assembly.For how avoiding damaging problem to occur, present stage does not still have concrete solution.So the technology of present stage can only be changed parts to fault, and does not have concrete solution.
Summary of the invention
The objective of the invention is to propose a kind ofly can solve transmission shaft reduces the transmission shaft torsional oscillation because of the special-use vehicle of problems such as load counter torque, the excessive transmission shaft torsional oscillation that causes of diametral load and propeller shaft center bearing breakage device.
For realizing above-mentioned purpose; The invention provides the device that a kind of special-use vehicle reduces the transmission shaft torsional oscillation; Comprise driving engine on the said special-use vehicle and suspend, first transmission shaft, universal coupling, propeller shaft center bearing, second transmission shaft, change speed gear box supplemental support, change speed gear box and auxiliary gear box behind the driving engine; Said propeller shaft center bearing comprises at least the first midship mounting, second midship mounting; And the midship mounting coupler, the inside of said first midship mounting and second midship mounting is equipped with through hole, and the through hole that said midship mounting coupler passes said first midship mounting and second midship mounting forms the two medial support structures of transmission shaft; And the axial angle α between said first transmission shaft and second transmission shaft satisfies: 1.4 ゜≤α≤3.0 ゜.
Preferably, the axial angle α between said first transmission shaft and second transmission shaft satisfies: 2.0 ゜≤α≤2.5 ゜.
More preferably, the underrun bolt of said first midship mounting and second midship mounting links to each other with the vehicle frame of vehicle.
Preferably, said change speed gear box supplemental support comprise lay respectively at change speed gear box before, supplemental support before the change speed gear box in right, left side, change speed gear box are right supports and a change speed gear box left side is supported.
Further preferably, supplemental support is that a point type supports before the said change speed gear box.
Preferably, on the said change speed gear box supplemental support damping block structure is installed also.
Preferably, said damping block structure comprises damping block hollow shell with " recessed " type zone and the rubber block that matches with said " recessed " type zone, and the inside of said rubber block is provided with the I-shaped template, and the top of said rubber block is provided with the rubber block connecting bore.
Preferably, said device also comprises bracing frame and the damping block base that matches with said damping block hollow shell shape, size, and said damping block base is provided with the metab connecting bore.
Based on technique scheme, advantage of the present invention is:
The present invention is provided with the two medial support structures of transmission shaft; And changed the axial setting angle between first transmission shaft and second transmission shaft, therefore, change the mode of propeller shaft center bearing; Solve damaging problem effectively; Simultaneously, the present invention has also reduced the transmission shaft runout effectively, has good effect to weakening the transmission shaft torsional oscillation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of existing power drive system;
Fig. 2 is the structural representation of an embodiment of the present invention;
Fig. 3 is the structural representation of the two medial support structures of transmission shaft of the present invention;
Fig. 4 is the top plan view of structure shown in Figure 3;
Fig. 5 is the side cutaway view of structure shown in Figure 3;
Fig. 6 is the structural representation of change speed gear box part among Fig. 3;
Fig. 7 is the schematic top plan view of structure shown in Figure 6;
Fig. 8 is a vibration damping block structured structural representation of the present invention;
Fig. 9 is the side cutaway view of structure shown in Figure 8.
The specific embodiment
Through accompanying drawing and embodiment, technical scheme of the present invention is done further description below.
Referring to Fig. 2～Fig. 9, wherein show various preferred embodiment of the present invention.
At first; Referring to Fig. 2; Reduce in the device of transmission shaft torsional oscillation at special-use vehicle of the present invention, comprise driving engine on the said special-use vehicle and suspend 8, first transmission shaft 6 behind the driving engine, universal coupling 5, propeller shaft center bearing 40, second transmission shaft 3, change speed gear box supplemental support, change speed gear box and auxiliary gear box 1, said propeller shaft center bearing 40 comprises at least the first midship mounting 41, second midship mounting 42; And midship mounting coupler 43, as shown in Figure 3; Propeller shaft center bearing 40 of the present invention can comprise a plurality of midship mounting monomers, in the present embodiment, has comprised two midship mounting monomers, that is: first midship mounting 41, second midship mounting 42; The inside of said first midship mounting 41 and second midship mounting 42 is equipped with through hole; The through hole that said midship mounting coupler 43 passes said first midship mounting 41 and second midship mounting 42 forms the two medial support structures of transmission shaft; First midship mounting 41, second midship mounting 42 are installed in respectively on the bearing seat 44 separately; Like Fig. 3, Fig. 4 and shown in Figure 5; The two medial support structures of this kind transmission shaft of the present invention can reduce the transmission shaft runout effectively, and the torsional oscillation that weakens transmission shaft is had significant effect; And the axial angle α between first transmission shaft 6 of the present invention and second transmission shaft 3 satisfies: 1.4 ゜≤α≤3.0 ゜, as shown in Figure 1, more preferably, said axial angle α satisfies: 2.0 ゜≤α≤2.5 ゜.
Contriver of the present invention is through following mode, and the optimum value that has obtained said axial angle α through a large amount of experiments is interval:
At first, be provided with at the flywheel shell of engine place three-axis acceleration sensor, three-axis acceleration sensor is set at the propeller shaft center bearing place, wireless torsion-testing sensor is set at the second transmission shaft place, wireless torsion-testing sensor is set, the vertical direction acceleration pick-up is set in the change speed gear box supplemental support at the first transmission shaft place;
Multichannel data acquisition system is set then, gathers the corresponding data that above-mentioned each sensor obtained.
Wherein, the layout of above-mentioned each sensor is followed following principle:
1, flywheel shell of engine place three-axis acceleration sensor is arranged in the clutch bell outside near first transmission shaft 6 and driving engine joint face place, and height is about 30mm with the axial line distance of first transmission shaft 6.
2, the midship mounting three-axis acceleration sensor is arranged in and supports inboard, the bearing outside, fits with the bearing brackett metal surface, avoids and supports intermediate rubber layer and contact.
3, wireless torque sensor be separately fixed at first transmission shaft centre and second transmission shaft near the change speed gear box place, so that the unbalanced moment that the test change speed gear box causes; Torque sensor turns round with axle, requires to install and fix reliable.
4, change speed gear box supplemental support place acceleration pick-up is arranged near second transmission shaft and change speed gear box input shaft joint face ± 40mm.
According to above-mentioned proving installation, can detect moment of torsion and the radial acceleration of propeller shaft center bearing and the displacement of beating of two sections transmission shafts in real time, the improvement of follow-up each structure is all through this proving installation checking torsional oscillation situation.
Concrete test method is following:
(1), because change speed gear box and driving engine have been accomplished space orientation, therefore, realize the variation of the axial angle of first, second transmission shaft through changing the distance that propeller shaft center bearing connects to ground and locates.
(2), the axial angle α of adjustment first transmission shaft, second transmission shaft is 3.8 °, and is as shown in Figure 2.
(3), according to installation rule in the step (1), the torsional oscillation proving installation is installed.
(4), high engine speeds running, stabilization of speed writes down each test data and storage between 2100～2300rpm.
(5), the first different transmission shafts, the axial angle α between second transmission shaft are selected in adjustment.
(6), under different axial angle α, test separately according to step (4) respectively, and the storage data.
(7), contrast the torsional oscillation test data of each axial angle α, the less numerical value interval of torsional oscillation load counter torque is: 1.4 ゜≤α≤3.0 ゜, and preferred axial angle α numerical value interval is 2.0 ゜≤α≤2.5 in many group experiments.
In addition, preferably, the underrun bolt of said first midship mounting 41 and second midship mounting 42 links to each other with the vehicle frame of vehicle.
Referring to Fig. 6 and Fig. 7, said change speed gear box supplemental support comprise lay respectively at change speed gear box before, supplemental support 22 before the change speed gear box in right, left side, change speed gear box right support 23 and a change speed gear box left side support 24.Preferably, the preceding supplemental support 22 of said change speed gear box is that a point type supports, and makes the preceding supplemental support 22 of change speed gear box and change speed gear box right side support 23, change speed gear box left side support 24 constitute the fixed pans of 3 definite supports thus.
Like Fig. 8 and shown in Figure 9, on the said change speed gear box supplemental support damping block structure 30 is installed also, particularly, described damping block structure 30 is installed in the A place on the change speed gear box supplemental support among Fig. 7; Further; Said damping block structure 30 comprises damping block hollow shell 31 with " recessed " type zone and the rubber block 34 that matches with said " recessed " type zone; The inside of said rubber block 34 is provided with I-shaped template 33, and the top of said rubber block 34 is provided with rubber block connecting bore 32.More preferably, said device also comprises bracing frame 35 and the damping block base 37 that matches with said damping block hollow shell 31 shapes, size, and said damping block base 37 is provided with metab connecting bore 36.
Particularly, damping block structure 30 is connected with the face of combining between the higher and lower levels through described metab connecting bore 36 and with vibration isolation rubber piece bolt (not shown) that metab connecting bore 36 matches, has better positioning effect; Simultaneously; The present invention adopts that damping coefficient is 0.15～0.25, temperature resistant range is the variable section rubber block 34 of-50 ゜～80 ゜; And in vibration isolation rubber piece 34, increase damping hole, the moderate structures such as I-shaped template 33 of position of center line increase dynamic rate, further played the effect of vibration damping.And the present invention has also adopted the and arranged on left and right sides of damping block structure 30 partly to be provided with damping block hollow shell 31 in order to consider best rigidity mass combination in design, and is as shown in Figure 8; Damping block structure 30 of the present invention can be born the rated load in 300N～5000N scope, and is applied widely, has the cost performance height, but and has secondary easy to maintenance and change advantages such as vibration isolation rubber, impact resistance are strong.
Need to prove that the present invention is " preceding " with the right direction among Fig. 1 and Fig. 2, left direction is " back ".
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (8)
1. a special-use vehicle reduces the device of transmission shaft torsional oscillation; Comprise driving engine on the said special-use vehicle and suspend (8), driving engine after first transmission shaft (6), universal coupling (5), propeller shaft center bearing (40), second transmission shaft (3), change speed gear box supplemental support (2), change speed gear box and auxiliary gear box (1); It is characterized in that: said propeller shaft center bearing (40) comprises at least the first midship mounting (41), second midship mounting (42); And midship mounting coupler (43); The inside of said first midship mounting (41) and second midship mounting (42) is equipped with through hole; The through hole that said midship mounting coupler (43) passes said first midship mounting (41) and second midship mounting (42) forms the two medial support structures of transmission shaft; And the axial angle α between said first transmission shaft (6) and second transmission shaft (3) satisfies: 1.4 ゜≤α≤3.0 ゜.
2. special-use vehicle according to claim 1 reduces the device of transmission shaft torsional oscillation, it is characterized in that: the axial angle α between said first transmission shaft (6) and second transmission shaft (3) satisfies: 2.0 ゜≤α≤2.5 ゜.
3. special-use vehicle according to claim 2 reduces the device of transmission shaft torsional oscillation, it is characterized in that: the underrun bolt of said first midship mounting (41) and second midship mounting (42) links to each other with the vehicle frame of vehicle.
4. special-use vehicle according to claim 2 reduces the device of transmission shaft torsional oscillation, it is characterized in that: said change speed gear box supplemental support (2) comprise lay respectively at change speed gear box before, supplemental support (22) before the change speed gear box in right, left side, change speed gear box are right supports (23) and change speed gear box left side support (24).
5. special-use vehicle according to claim 4 reduces the device of transmission shaft torsional oscillation, it is characterized in that: supplemental support (22) is that a point type supports before the said change speed gear box.
6. reduce the device of transmission shaft torsional oscillation according to claim 1 or 5 described special-use vehicles, it is characterized in that: damping block structure (30) also is installed on the said change speed gear box supplemental support (2).
7. special-use vehicle according to claim 6 reduces the device of transmission shaft torsional oscillation; It is characterized in that: said damping block structure (30) comprises damping block hollow shell (31) with " recessed " type zone and the rubber block (34) that matches with said " recessed " type zone; The inside of said rubber block (34) is provided with I-shaped template (33), and the top of said rubber block (34) is provided with rubber block connecting bore (32).
8. special-use vehicle according to claim 7 reduces the device of transmission shaft torsional oscillation; It is characterized in that: said device also comprises bracing frame (35) and the damping block base (37) that matches with said damping block hollow shell (31) shape, size, and said damping block base (37) is provided with metab connecting bore (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261358.0A CN102756647B (en) | 2012-07-27 | 2012-07-27 | Device for reducing transmission shaft torsional vibration of special vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210261358.0A CN102756647B (en) | 2012-07-27 | 2012-07-27 | Device for reducing transmission shaft torsional vibration of special vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102756647A true CN102756647A (en) | 2012-10-31 |
| CN102756647B CN102756647B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210261358.0A Expired - Fee Related CN102756647B (en) | 2012-07-27 | 2012-07-27 | Device for reducing transmission shaft torsional vibration of special vehicle |
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| Country | Link |
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| CN (1) | CN102756647B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975580A (en) * | 2017-12-27 | 2018-05-01 | 徐州徐工环境技术有限公司 | The transmission device and dust suppression car of dust suppression car |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002211260A (en) * | 2001-01-19 | 2002-07-31 | Suzuki Motor Corp | Propeller shaft |
| US20030183439A1 (en) * | 2001-01-23 | 2003-10-02 | Paccar Inc | Low vibration driveline |
| US20110091142A1 (en) * | 2008-03-18 | 2011-04-21 | SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG | Support Arrangement for the Axially and Radially Yielding Support of a Shaft Bearing |
| CN202242982U (en) * | 2011-10-20 | 2012-05-30 | 中联重科股份有限公司 | Transmission shaft device and middle support structure thereof |
| CN202685935U (en) * | 2012-07-27 | 2013-01-23 | 徐州重型机械有限公司 | Device for reducing torsion vibration of transmission shaft of special vehicle |
-
2012
- 2012-07-27 CN CN201210261358.0A patent/CN102756647B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002211260A (en) * | 2001-01-19 | 2002-07-31 | Suzuki Motor Corp | Propeller shaft |
| US20030183439A1 (en) * | 2001-01-23 | 2003-10-02 | Paccar Inc | Low vibration driveline |
| US20110091142A1 (en) * | 2008-03-18 | 2011-04-21 | SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG | Support Arrangement for the Axially and Radially Yielding Support of a Shaft Bearing |
| CN202242982U (en) * | 2011-10-20 | 2012-05-30 | 中联重科股份有限公司 | Transmission shaft device and middle support structure thereof |
| CN202685935U (en) * | 2012-07-27 | 2013-01-23 | 徐州重型机械有限公司 | Device for reducing torsion vibration of transmission shaft of special vehicle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975580A (en) * | 2017-12-27 | 2018-05-01 | 徐州徐工环境技术有限公司 | The transmission device and dust suppression car of dust suppression car |
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| Publication number | Publication date |
|---|---|
| CN102756647B (en) | 2015-05-13 |
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Address after: 221001 Jiangsu city of Xuzhou Province Economic and Technological Development Zone of High Road No. 68 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Patentee before: Xuzhou Heavy Machinery Co., Ltd. |
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Granted publication date: 20150513 Termination date: 20190727 |
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