CN102975769B - A kind of rubber-tyred paver and propons thereof - Google Patents
A kind of rubber-tyred paver and propons thereof Download PDFInfo
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- CN102975769B CN102975769B CN201210552580.6A CN201210552580A CN102975769B CN 102975769 B CN102975769 B CN 102975769B CN 201210552580 A CN201210552580 A CN 201210552580A CN 102975769 B CN102975769 B CN 102975769B
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Abstract
The invention discloses a kind of propons, this propons comprises support body and train, and its front steering joint is articulated with support body, is articulated with pull bar at the second hinge place at the first hinge place, and rear steering joint is articulated with support body, is articulated with pull bar at the 4th hinge place at tri-joint mechanism place; The distance of the first hinge and the second hinge is less than the distance of tri-joint mechanism and the 4th hinge, and the turning track of front-wheel circle is concentric circles with the turning track circle of trailing wheel.Like this, the line of four hinges forms quadric linkage, and the line between the second hinge and the 4th hinge is crank, according to quadric linkage characteristic, in steering procedure, front wheel steering angle is greater than rear-axle steering angle, and in steering procedure, the turning track circle of front-wheel is concentric circles with the turning track circle of trailing wheel, decrease the wearing and tearing that tire occurs in steering procedure, thus extend the service life of tire, save maintenance cost.The invention also discloses a kind of rubber-tyred paver comprising above-mentioned propons.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of propons for paver.The invention still further relates to a kind of rubber-tyred paver comprising above-mentioned propons.
Background technology
Along with the development of town and country capital construction, market increases day by day for the demand of various maintenance of surface equipment especially paver, improves gradually the performance requriements of paver.According to the Type division of traveling gear, paver mainly comprises crawler-type paver and rubber-tyred paver, rubber-tyred paver adopts the mode of wheel tyre walking, and comparatively crawler-type paver is more convenient for transition, is mainly used in the construction of basic unit and the various material paving operation of surface layer on express highway.
Propons is positioned at the front portion of paver, and for supporting complete machine weight and providing angle of turn, front bridge portion is the important component part of rubber-tyred paver running gear, and the quality of its performance directly affects performance and the stability of rubber-tyred paver.
Please refer to Fig. 1, Fig. 1 is a kind of structural representation of typical rubber-tyred paver propons.
A kind of typical rubber-tyred paver propons comprises the heavy frame 12 be fixedly installed on paver chassis, the two ends of propping up heavy frame are separately installed with rocker 13, front-wheel 15 is installed by front steering joint 14 in the front end of each rocker, by rear steering joint 16, trailing wheel 17 is installed, front steering joint is saved with rear steering and is connected by pull bar 18, and wherein pull bar is straight-bar; Front steering joint is articulated with rocker at the first hinge place, be articulated with pull bar at the second hinge place, rear steering joint is articulated with rocker at tri-joint mechanism place, is articulated with pull bar at the 4th hinge place, wherein, the distance of the first hinge and the second hinge equals the distance of tri-joint mechanism and the 4th hinge; Two front steering joints are connected by steering track rod 19, and one end of steering track rod and oil cylinder 11 is hinged, and the other end of oil cylinder is fixed on chassis.
In above-mentioned front axle mechanism, pull bar is straight-bar, and the distance of the first hinge A1 and the second hinge A2 equals the distance of tri-joint mechanism A3 and the 4th hinge A4, the line of four hinges forms parallelogram sturcutre, then according to parallelogram characteristic, in the steering procedure of propons, its front-wheel is consistent with the deflection angle of trailing wheel, and the path that front and back wheel turns in steering procedure is different, the path length of backgear ratio front-wheel process, the locus circle that then turn radius of front and back wheel is formed intersects, thus causes the not equivalent wearing and tearing of tire, reduces the service life of tire; Meanwhile, the steering cylinder of above-mentioned propons is arranged on flower wheel (i.e. front-wheel), causes system power to lose larger; In addition, propons is fixedly mounted on chassis by a heavy frame, and the crossing ability of paver on roughness pavement is poor.
Therefore, how to avoid the tire in propons to wear and tear in rotation, extend the service life of tire, saving maintenance cost, needing the problem of solution with regard to becoming those skilled in the art badly.
Summary of the invention
The object of this invention is to provide a kind of propons for rubber-tyred paver, the wearing and tearing that its tire occurs in steering procedure are less, thus extend the service life of tire, saved maintenance cost.Another object of the present invention is to provide a kind of rubber-tyred paver comprising above-mentioned propons.
For solving the problems of the technologies described above, the invention provides a kind of propons for rubber-tyred paver, comprise the support body on the chassis being installed on described rubber-tyred paver, the two ends of described support body are separately installed with train, and described train is comprised and is installed on described support body and the front steering joint connected by pull bar and rear steering joint; Described front steering joint is articulated with described support body, is articulated with described pull bar at the second hinge place at the first hinge place, described rear steering joint is articulated with described support body, is articulated with described pull bar at the 4th hinge place at tri-joint mechanism place; The distance of described first hinge and described second hinge is less than the distance of described tri-joint mechanism and described 4th hinge, and the turning track of described front-wheel circle is concentric circles with the turning track circle of described trailing wheel.
Preferably, described pull bar comprises the first straight section, the second straight section and connects the oblique section of described first straight section and described second straight section; Described first straight section is articulated with described support body away from one end of described oblique section by described second hinge, and described second straight section is articulated with described support body away from one end of described oblique section by described 4th hinge.
Preferably, described support body comprises the crossbeam being installed on described chassis and the rocker being installed on described crossbeam two ends, and rocker described in two is connected with described train respectively.
Preferably, described rocker rotates and is installed on described crossbeam, the pivot center of described rocker and the dead in line of described crossbeam or parallel.
Preferably, described rocker is installed on described crossbeam by bearing.
Preferably, described crossbeam rotates and is installed on described chassis, and the pivot center of described crossbeam is arranged along the fore-and-aft direction of described rubber-tyred paver.
Preferably, described crossbeam is installed on described chassis by bearing pin, and the axis of described bearing pin is arranged along the fore-and-aft direction of described rubber-tyred paver.
Preferably, the steering track rod of described propons to be arranged at described in two between rear steering joint.
Preferably, rear steering joint described in two is separately installed with motor.
The present invention also provides a kind of rubber-tyred paver, and comprise chassis and the propons being arranged at described chassis, described propons is propons as above.
Propons provided by the present invention is used for rubber-tyred paver, this propons comprises support body and train, wherein, erection of frames is on the chassis of this rubber-tyred paver, and train has two, be installed on the two ends of support body respectively, train comprises front steering joint and rear steering joint further, the front-wheel of propons is installed on this front steering joint, and trailing wheel is installed on this rear steering joint, and two steering swivels are all installed on support body and are connected by pull bar; Front steering joint is articulated with support body, is articulated with pull bar at the second hinge place at the first hinge place, rear steering joint is articulated with support body, is articulated with pull bar at the 4th hinge place at tri-joint mechanism place; The distance of the first hinge and the second hinge is less than the distance of tri-joint mechanism and the 4th hinge, and the turning track of front-wheel circle is concentric circles with the turning track circle of trailing wheel.
Like this, distance due to the first hinge and the second hinge is less than the distance of tri-joint mechanism and the 4th hinge, now the line of four hinges forms quadric linkage, and the line between the second hinge and the 4th hinge is crank, according to quadric linkage characteristic, in steering procedure, front wheel steering angle is greater than rear-axle steering angle, and in steering procedure, the turning track circle of front-wheel is concentric circles with the turning track circle of trailing wheel, decrease the wearing and tearing that tire occurs in steering procedure, thus extend the service life of tire, save maintenance cost.
In a kind of detailed description of the invention, propons provided by the present invention, its support body comprises crossbeam and rocker further, and wherein, crossbeam is installed on the chassis of paver, and rocker has two, and is installed on the two ends of this crossbeam respectively, and two rockers are connected with train respectively; Crossbeam is installed on chassis by bearing pin, and the axis of bearing pin is arranged along the fore-and-aft direction of rubber-tyred paver, and crossbeam can rotate around bearing pin under the effect of external force; Like this, propons entirety can swing around the bearing pin between crossbeam and chassis, thus achieve the swing of whole system in the certain angle of space, improve the stability of paver in roughness pavement driving process and traveling comfort, effectively extend the service life of propons.
In another kind of detailed description of the invention, the steering track rod of described propons provided by the present invention to be arranged at described in two between rear steering joint, is namely wheel flutter with trailing wheel, is arranged on by steering cylinder on driving wheel (i.e. trailing wheel), thus reduces the loss in efficiency of system.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of typical rubber-tyred paver propons;
Fig. 2 is the structural representation of a kind of detailed description of the invention of propons provided by the present invention;
Fig. 3 is the analysis schematic diagram at propons provided by the present invention front-and rear-wheel steer angle when turning to;
Fig. 4 is for propons shown in Fig. 2 is at the cutaway view in A-A direction;
Fig. 5 is for propons shown in Fig. 2 is at the cutaway view in B-B direction;
Fig. 6 is under steering cylinder is arranged on drive wheel situation, the mechanical analysis schematic diagram of wheel flutter during paver right steering;
Fig. 7 is under steering cylinder is arranged on drive wheel situation, the mechanical analysis schematic diagram of wheel flutter during paver left steering;
Fig. 8 is under steering cylinder is arranged on flower wheel situation, the mechanical analysis schematic diagram of wheel flutter when paver right steering;
Fig. 9 is under steering cylinder is arranged on flower wheel situation, the mechanical analysis schematic diagram of wheel flutter when paver left steering.
Detailed description of the invention
Core of the present invention is to provide a kind of propons for rubber-tyred paver, and the wearing and tearing that its tire occurs in steering procedure are less, thus extend the service life of tire, saved maintenance cost.Another core of the present invention is to provide a kind of rubber-tyred paver comprising above-mentioned propons.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 2 to Fig. 5, Fig. 2 is the structural representation of a kind of detailed description of the invention of propons provided by the present invention; Fig. 3 is the analysis schematic diagram at propons provided by the present invention front-and rear-wheel steer angle when turning to; Fig. 4 is for propons shown in Fig. 2 is at the cutaway view in A-A direction; Fig. 5 is for propons shown in Fig. 2 is at the cutaway view in B-B direction.
Propons provided by the present invention is used for rubber-tyred paver, this propons comprises support body and train, wherein, erection of frames is on the chassis of this rubber-tyred paver, and train has two, be installed on the two ends of support body respectively, train comprises front steering joint 33 and rear steering joint 34 further, the front-wheel 38 of propons is installed on this front steering joint 33, and trailing wheel 39 is installed on this rear steering joint 34, two steering swivels and is all installed on support body and is connected by pull bar 32; Front steering joint 33 is articulated with support body, is articulated with pull bar 32 at the second hinge B2 place at the first hinge B1 place, rear steering joint 34 is articulated with support body, is articulated with pull bar 32 at the 4th hinge B4 place at tri-joint mechanism B3 place; The distance of the first hinge B1 and the second hinge B2 is less than the distance of tri-joint mechanism B3 and the 4th hinge B4, and the turning track of front-wheel 38 circle is concentric circles with the turning track circle of trailing wheel 39, and in Fig. 2, the direction of arrow is the working direction of paver.
It is to be noted, under the distance of the first hinge B1 and the second hinge B2 is less than the prerequisite of the distance of tri-joint mechanism B3 and the 4th hinge B4, ensure that the turning track circle of front-wheel 38 is concentric circles with the turning track circle of trailing wheel 39, need the front steering joint 33 according to homonymy and rear steering joint 34 actual distance in a forward direction, and first hinge B1 and the concrete numerical value of the second hinge B2 distance and the concrete numerical value of tri-joint mechanism B3 and the 4th hinge B4 distance determine, the paver of different model is due to the front steering joint 33 of homonymy and rear steering joint 34 actual distance in a forward direction, when the turning track circle of the turning track circle and trailing wheel 39 that meet front-wheel 38 is for concentric circles, the concrete numerical value of the spacing of each hinge can be determined by calculating, in this no limit.
Ordinal numbers such as " first, second, third, fourth " described in literary composition is the different parts in order to distinguish same names, only for convenience, does not represent certain order, more should not be construed any restriction.
The structure of above-mentioned pull bar 32 can be specially the oblique section comprising the first straight section, the second straight section and connect described first straight section and described second straight section; Described first straight section is articulated with described support body away from one end of described oblique section by described second hinge B2, and described second straight section is articulated with described support body away from one end of described oblique section by described 4th hinge B4; The distance realizing the first hinge B1 and the second hinge B2 by the form of non-straight-bar is less than the distance of tri-joint mechanism B3 and the 4th hinge B4, and structure is comparatively simple, and stability is better.
The gradient of above-mentioned oblique section should be determined according to parameters such as the length of two straight sections and the actual distances between front steering joint 33 and rear steering joint 34, does not limit at this.
From theory, pull bar 32 is not limited to said structure form, as long as two steering swivels of homonymy can be connected, and ensure the distance of the first hinge B1 and the second hinge B2, be less than the distance of tri-joint mechanism B3 and the 4th hinge B4, such as, pull bar 32 also can be straight-bar, and the integral inclined front steering being arranged at homonymy saves between 33 and rear steering joint 34.
Like this, distance due to the first hinge B1 and the second hinge B2 is less than the distance of tri-joint mechanism B3 and the 4th hinge B4, now the line of four hinges forms quadric linkage, and the line between the second hinge B2 and the 4th hinge B4 is crank, according to quadric linkage characteristic, in steering procedure, front-wheel 38 deflection angle α is greater than trailing wheel 39 deflection angle β, and in steering procedure, the turning track circle of front-wheel is concentric circles with the turning track circle of trailing wheel 39, namely with one heart (in Fig. 2, T1 represents front-wheel 38 to the circle that formed of turn radius, T2 represents trailing wheel 39, R represents turn radius), thus decrease the wearing and tearing that tire occurs in steering procedure, extend the service life of tire, save maintenance cost.
In a kind of detailed description of the invention, above-mentioned support body comprises crossbeam 31 and rocker 35, and wherein, crossbeam 31 is installed on chassis, and rocker 35 has two, is installed on the two ends of crossbeam 31 respectively, and two rockers 35 are connected with train respectively; Like this, in the fabrication process, crossbeam 31 and rocker 35 can be processed respectively, refill and be made into support body, thus simplify the course of processing.
From theory, between be also not limited to said structure, support body also can be the structure of integral type.
Above-mentioned rocker 35 can rotate and be installed on crossbeam 31, the pivot center of rocker 35 and the dead in line of crossbeam 31 or parallel; Like this, rocker 35 can rotate around it before and after axis relative to crossbeam 31 and rotate, thus achieves and take turns the swing that ties up in the certain angle of space, improves the stability of paver in roughness pavement driving process and traveling comfort.
Rocker 35 can be installed on crossbeam 31 by bearing, particularly, mounting hole is offered in the appropriate location of rocker 35, the outer ring of bearing is fixed in mounting hole, crossbeam 31 is through bearing, and be fixed on the inner ring of bearing, thus realize the swing of rocker 35 relative to crossbeam 31 by the relative motion between bearing enclose; Apparently, being rotationally connected between rocker 35 and crossbeam 31 is not limited to bearing, as long as can realize rocker 35 relative to crossbeam 31 around pivot axis, such as, also can realize being rotationally connected by the mode of pinned connection.
Support body comprises crossbeam 31 and rocker 35 further, and wherein, crossbeam 31 is installed on the chassis of paver, and rocker 35 has two, and is installed on the two ends of this crossbeam 31 respectively, and two rockers 35 are connected with train respectively; Crossbeam 31 is installed on chassis by bearing pin, and the axis of bearing pin is arranged along the fore-and-aft direction of rubber-tyred paver, and crossbeam 31 can rotate around bearing pin under the effect of external force; Like this, propons entirety can swing around the bearing pin between crossbeam 31 and chassis, thus achieve the swing of whole system in the certain angle of space, improve the stability of paver in roughness pavement driving process and traveling comfort, effectively extend the service life of propons.
Above-mentioned crossbeam 31 is also not limited to be rotated by the mode of pinned connection and is installed on chassis, from theory, as long as crossbeam 31 can be realized to be rotated around it axis relative to chassis and rotate, such as, transmission gear etc. can be set between and realize being rotationally connected.
In another kind of detailed description of the invention, the steering track rod 36 of described propons provided by the present invention is arranged at rear steering described in two and saves between 34, namely with trailing wheel 39 for wheel flutter, steering cylinder is arranged on driving wheel (i.e. trailing wheel 39), thus reduces the loss in efficiency of system.
In above-mentioned detailed description of the invention, because rubber-tyred paver ground adhesion value is poor, paving operation is not steady, in order to make it have good adhesion value closer to crawler-type paver, therefore in front bridge system, increase pair of driving wheels namely increase by a pair motor 37 auxiliary power is provided, now, steering cylinder has two kinds of mounting meanss, one is arranged on pure wheel flutter, and another kind is arranged on to turn to and adds in auxiliary drive wheels, and the stressing conditions below with regard to two kinds of mounting meanss is analyzed.
When the steering cylinder point of application is installed on the drive wheel, as shown in Figure 6, when paver right steering, oil cylinder is to tire action force F1, and ground is in the face of tire forward driving forces F2, drive torque M2 and M2=F2*L2.F1 equivalence to the tire centerline F1-1 of rotating shaft O1 conllinear, from the additional moment of rotation M1 of strength of material knowledge: F1=F1-1 and M1=F1*L1.Drive wheel integral-rotation moment is M=M1+M2, and S. A. O1 by the effect of fore-and-aft direction shearing stress, does not turn to smooth and easy; As shown in Figure 7, when paver left steering, drive wheel integral-rotation moment is M=M1-M2, only have when M1 is greater than M2, namely when oil cylinder tensile force f 1 is enough large, system could realize turning to, but adds and subtracts in S. A. O1 side because of M1 and M2, therefore S. A. O1 is not still by the effect of fore-and-aft direction shearing stress, turns to smoothly.
When steering cylinder is arranged on flower wheel position, as shown in Figure 8, when paver right steering, drive wheel integral-rotation moment is M=M3+M2(M3=η * M1 η is moment loss coefficient), though M3 and M2 is in S. A. O1 both sides, but moment of rotation direction is identical, therefore S. A. O1 torque suspension effect be not by the effect of fore-and-aft direction shearing stress, turns to smooth and easy; As shown in Figure 9, during paver left steering, drive wheel integral-rotation moment is M=M3-M2, only has when M3 is greater than M2, when namely Drawbar Pull F is enough large, system could realize turning to, but because M3 and M2 adds and subtracts in S. A. O1 both sides, therefore not only torque suspension effect is also by the effect of fore-and-aft direction shearing stress for S. A. O1, and the generation of fore-and-aft direction shearing stress not only makes system generation parasitic horsepower shorten the service life of S. A. O1 simultaneously, turn to and have some setbacks, easily occur clamping stagnation; As from the foregoing, the stress performance when steering cylinder point of application is installed on the drive wheel is better, therefore, when increasing auxiliary power, be arranged on by motor 37 on two rear steering joints 34, effect when being drive wheel with seasonal trailing wheel 39 is better, certainly, other forms of arrangement is also allow.
Except above-mentioned propons, the present invention also provides a kind of rubber-tyred paver comprising above-mentioned propons, and other Each part of this rubber-tyred paver please refer to prior art, do not repeat them here.
Above a kind of rubber-tyred paver provided by the present invention and propons thereof are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. the propons for rubber-tyred paver, comprise the support body on the chassis being installed on described rubber-tyred paver, the two ends of described support body are separately installed with train, and described train comprises and is installed on described support body and front steering joint (33) connected by pull bar (32) and rear steering save (34); Described front steering joint (33) is articulated with described support body, is articulated with described pull bar (32) at the second hinge place at the first hinge place, described rear steering joint (34) is articulated with described support body, is articulated with described pull bar (32) at the 4th hinge place at tri-joint mechanism place; It is characterized in that, the distance of described first hinge and described second hinge is less than the distance of described tri-joint mechanism and described 4th hinge, and the turning track of described front-wheel circle is concentric circles with the turning track circle of described trailing wheel.
2. the propons for rubber-tyred paver according to claim 1, is characterized in that, described pull bar (32) comprises the first straight section, the second straight section and connects the oblique section of described first straight section and described second straight section; Described first straight section is articulated with described support body away from one end of described oblique section by described second hinge, and described second straight section is articulated with described support body away from one end of described oblique section by described 4th hinge.
3. the propons for rubber-tyred paver according to claim 1, it is characterized in that, described support body comprises the crossbeam (31) being installed on described chassis and the rocker (35) being installed on described crossbeam (31) two ends, and rocker described in two (35) is connected with described train respectively.
4. the propons for rubber-tyred paver according to claim 3, is characterized in that, described rocker (35) rotates and is installed on described crossbeam (31), the pivot center of described rocker (35) and the dead in line of described crossbeam (31) or parallel.
5. the propons for rubber-tyred paver according to claim 4, is characterized in that, described rocker (35) is installed on described crossbeam (31) by bearing.
6. the propons for rubber-tyred paver according to claim 3, is characterized in that, described crossbeam (31) rotates and is installed on described chassis, and the pivot center of described crossbeam (31) is arranged along the fore-and-aft direction of described rubber-tyred paver.
7. the propons for rubber-tyred paver according to claim 6, is characterized in that, described crossbeam (31) is installed on described chassis by bearing pin, and the axis of described bearing pin is arranged along the fore-and-aft direction of described rubber-tyred paver.
8. the propons for rubber-tyred paver according to any one of claim 1 to 7, is characterized in that, the steering track rod (36) of described propons is arranged at rear steering described in two and saves between (34).
9. the propons for rubber-tyred paver according to claim 8, is characterized in that, rear steering joint (34) described in two is separately installed with motor (37).
10. a rubber-tyred paver, comprise chassis and the propons being arranged at described chassis, it is characterized in that, described propons is the propons as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210552580.6A CN102975769B (en) | 2012-12-18 | 2012-12-18 | A kind of rubber-tyred paver and propons thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210552580.6A CN102975769B (en) | 2012-12-18 | 2012-12-18 | A kind of rubber-tyred paver and propons thereof |
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| CN102975769A CN102975769A (en) | 2013-03-20 |
| CN102975769B true CN102975769B (en) | 2015-08-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104401396A (en) * | 2014-10-28 | 2015-03-11 | 北京北方车辆集团有限公司 | Vehicle chassis structure |
| CN104594161B (en) * | 2014-11-28 | 2016-09-14 | 山推工程机械股份有限公司 | Tire paver and traveling control system thereof |
| CN106275069B (en) * | 2015-05-27 | 2018-12-21 | 比亚迪股份有限公司 | Wheel steering mechanism and vehicle |
| CN108163046B (en) * | 2018-01-18 | 2018-10-30 | 阜南县申通机械制造有限公司 | A kind of driven transfer of trailing wheel |
| CN114885669A (en) * | 2022-05-06 | 2022-08-12 | 辽宁辽拓大益农业机械有限公司 | Eight-drive four-steering corn harvester |
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|---|---|---|---|---|
| CN2534224Y (en) * | 2002-02-28 | 2003-02-05 | 南文辉 | Supporting wheel steering mechanism for push type double-feeding inlet stable material paver |
| CN201999061U (en) * | 2011-01-07 | 2011-10-05 | 三一重工股份有限公司 | Wheel type paver and front wheel rotation angle measuring device |
| CN202054051U (en) * | 2010-12-09 | 2011-11-30 | 赵金叶 | Vehicle body steering connecting rod |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010048185B4 (en) * | 2010-10-13 | 2021-10-28 | Wirtgen Gmbh | Self-propelled construction machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2534224Y (en) * | 2002-02-28 | 2003-02-05 | 南文辉 | Supporting wheel steering mechanism for push type double-feeding inlet stable material paver |
| CN202054051U (en) * | 2010-12-09 | 2011-11-30 | 赵金叶 | Vehicle body steering connecting rod |
| CN201999061U (en) * | 2011-01-07 | 2011-10-05 | 三一重工股份有限公司 | Wheel type paver and front wheel rotation angle measuring device |
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