CN202610691U - Equal-stroke asphalt paver double-vibration device - Google Patents
Equal-stroke asphalt paver double-vibration device Download PDFInfo
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- CN202610691U CN202610691U CN 201220296065 CN201220296065U CN202610691U CN 202610691 U CN202610691 U CN 202610691U CN 201220296065 CN201220296065 CN 201220296065 CN 201220296065 U CN201220296065 U CN 201220296065U CN 202610691 U CN202610691 U CN 202610691U
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Abstract
The utility model discloses an equal-stroke asphalt paver double-vibration device. The equal-stroke asphalt paver double-vibration device comprises an eccentric shaft, a front vibration device, a back vibration device, a left fixing supporting part and a right fixing supporting part, wherein the front vibration device, the back vibration device, the left fixing supporting part and the right fixing supporting part are installed on the eccentric shaft. The eccentric shaft comprises a left outer side eccentric section, a left side non-eccentric section, a left inner side eccentric section, a central non-eccentric section, a right inner side eccentric section, a first right side non-eccentric section and a right outer side eccentric section which are arranged from left to right in sequence and connected with each other, wherein the eccentric direction of the left outer side eccentric section is the same as that of the right outer side eccentric section, the eccentric distances of the left outer side eccentric section and the right outer side eccentric section are both e1, the eccentric direction of the left inner eccentric section is the same as that of the right inner side eccentric section, the eccentric distances of the left inner eccentric section and the right inner side eccentric section are both e2, e1 is equal to e2, the eccentric direction of the left outer side eccentric section is reverse to that of the left inner side eccentric section, and the eccentric direction of the right outer side eccentric section is reverse to that of the right inner side eccentric section. The equal-stroke asphalt paver double-vibration device is capable of effectively eliminating the influence of inertia force on an asphalt paver, the structure of an asphalt paver vibration device is simplified, and the vibration influence on a screed plate when the asphalt paver vibration device works is reduced.
Description
Technical field
The utility model relates to a kind of paver tamping equipment, especially relates to a kind of two tamping equipments of asphalt paver that wait stroke.
Background technology
Asphalt paver is an imperative equipment in the road machine construction.Tamping equipment is one of groundwork device of paver, and it is close to the screed front, and material spreader is played tamping, and its service behaviour is to the planeness of paving concrete pavement and degree of compaction important influence all.Tamping equipment generally is divided into and singly vibrates and two two kinds of forms of vibrating wherein two vibrating because of having higher precompressed solidity, so in paver, be widely adopted.Direction of advance according to paver; The part of vibrating before two tamping equipments comprise with after the part of vibrating; Drive an eccentric shaft through power set and rotate, thus vibrate before driving part with after the part of vibrating pump, realize closely knit to making firm by ramming of bituminous mixture.
At present, two tamping equipments stroke that vibrates before all being basically is that 0-3-6-9-12mm is adjustable, after the stroke that vibrates be the fixing structure of 5mm.Yet in the practice of construction process, the paver stroke that vibrates is not often regulated, and the stroke that vibrates before adopting mostly is 6mm, after the stroke that vibrates be this mode of operation of 5mm.The stroke governor motion that vibrates is made up of eccentric shaft and eccentric bushing, and eccentric bushing is placed on the eccentric shaft, through the relative angle of adjusting eccentric bushing and eccentric shaft, thereby changes eccentric shaft and the formed total offset of eccentric bushing, and then changes the stroke that vibrates.Though before the stroke that vibrates adjustable, can vibrate parameter for you to choose for the user provides multiple, brought adverse influence also for paver and performance thereof.At first,, require height, often cause the stroke of same tamping equipment right ends inconsistent during adjusting easily, cause the tamping equipment can't operate as normal making with installation accuracy because the stroke governor motion that vibrates is comparatively complicated; And even more serious be that two tamping equipments are in reciprocating motion; Because the stroke of the forward and backward part of vibrating is different; The direction of motion is not opposite; Must make it produce bigger unbalance inertia force in the course of the work, thereby screed is produced negative interference and bad vibration effect, cause the spreading quality of decline of machine functional performance and road pavement to reduce.Therefore, how effectively to eliminate the inertia force that tamping equipment produces, be problem and technological difficulties that numerous paver manufacturer pays special attention to always.
The utility model content
The purpose of the utility model is to overcome above-mentioned deficiency of the prior art; A kind of two tamping equipments of asphalt paver that wait stroke are provided, can effectively eliminate the influence of inertia force, not only simplified the structure of existing asphalt paver tamping equipment paver; It is simpler to make manufacturing install; And service behaviour is also more reliable, and can significantly reduce in the tamping equipment course of work bad vibration influence to screed, has effectively improved the spreading quality on road surface.
For realizing above-mentioned purpose; The technical scheme that the utility model adopts is: a kind of two tamping equipments of asphalt paver that wait stroke is characterized in that: comprise eccentric shaft and be installed in preceding tamping equipment, back tamping equipment, left fixed support part and the right fixed support part on the said eccentric shaft; Said eccentric shaft comprises and setting gradually from left to right and interconnective left-external side eccentric segment, left side non-eccentricity section, left inboard eccentric segment, center non-eccentricity section, Right Inboard eccentric segment, the first right side non-eccentricity section and right outside eccentric segment; Identical and the eccentric throw of the eccentric direction of said left-external side eccentric segment and right outside eccentric segment is e1; Identical and the eccentric throw of the eccentric direction of inboard eccentric segment in a said left side and Right Inboard eccentric segment is e2; Said e1=e2; The eccentric direction of said left-external side eccentric segment and left inboard eccentric segment is opposite, and the eccentric direction of said right outside eccentric segment and Right Inboard eccentric segment is opposite.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke; It is characterized in that: beam, the left front bearing that vibrates, the right front bearing that vibrates, left front bearing support and the right front bearing support that vibrates of vibrating vibrate before tamping equipment comprises before said; The said left front bearing support that vibrates is connected on the left inboard eccentric segment through the left front bearing holder (housing, cover) that vibrates; The said right front bearing support that vibrates is connected on the Right Inboard eccentric segment through the right front bearing holder (housing, cover) that vibrates, and said left front bottom of vibrating bearing support and the right front bearing support that vibrates all is fixedly connected with the beam that before vibrates through first bolt.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke; It is characterized in that: beam, the left back bearing that vibrates, the right back bearing that vibrates, left back bearing support and the right back bearing support that vibrates of vibrating vibrate after said back tamping equipment comprises; The said left back bearing support that vibrates is connected on the left-external side eccentric segment through the left back bearing holder (housing, cover) that vibrates; The said right back bearing support that vibrates is connected on the eccentric segment of the right outside through the right back bearing holder (housing, cover) that vibrates, the bottom of said left back vibrate bearing support and the right back bearing support that vibrates all through second bolt with after the beam that vibrates be fixedly connected.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke, it is characterized in that: said left fixed support portion branch comprises left spring bearing and left supporting bearing base, said left supporting bearing base is socketed on the non-eccentricity section of left side through left spring bearing; Said right fixed support portion branch comprises right spring bearing and right supporting bearing base, and said right supporting bearing base is socketed on the first right side non-eccentricity section through right spring bearing.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke is characterized in that: said e1=e2=2.5mm or e1=e2=3mm.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke, it is characterized in that: said eccentric shaft also comprises the second right side non-eccentricity section that is arranged on right outside eccentric segment right-hand member, the said second right side non-eccentricity section is connected with right outside eccentric segment.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke, it is characterized in that: said left-external side eccentric segment, left side non-eccentricity section, left inboard eccentric segment, center non-eccentricity section, Right Inboard eccentric segment, the first right side non-eccentricity section, right outside eccentric segment and the second right side non-eccentricity section are one-body molded.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke; It is characterized in that: said left-external side eccentric segment is symmetrical set with right outside eccentric segment; The said left side non-eccentricity section and the first right side non-eccentricity section are symmetrical set, and inboard eccentric segment in a said left side and Right Inboard eccentric segment are symmetrical set.
Above-mentioned a kind of two tamping equipments of asphalt paver that wait stroke is characterized in that: the Liang Hehou that vibrates before the said Liangping row setting of vibrating.
The utility model compared with prior art has the following advantages:
1, in the utility model; Because the eccentric direction of left-external side eccentric segment and right outside eccentric segment is identical and eccentric throw is e1; Identical and the eccentric throw of the eccentric direction of a left side inboard eccentric segment and Right Inboard eccentric segment is e2, e1=e2, and the eccentric direction of left-external side eccentric segment and left inboard eccentric segment is opposite; The eccentric direction of right outside eccentric segment and Right Inboard eccentric segment is opposite; Therefore tamping equipment and back tamping equipment differ 180 ° on the phase place before making when vibration, have so not only effectively eliminated the influence of vibrating inertia force to paver, and can reduce significantly that the bad vibration to screed influences in the tamping equipment course of work.
2, since two tamping equipments move reciprocatingly in the course of the work before the vibrate phase difference of beam of Liang Hehou that vibrates be 180 °; And stroke equates all the time; The reciprocal inertia force that beam produces thereby the Liang Hehou that vibrates before making vibrates can effectively be cancelled out each other, thereby the negative interference of screed generation and the influence of bad vibration are reduced greatly.Two tamping equipments of this structure are designed to 2.5mm or 3mm with eccentric distance e 1 with e2 simultaneously, and the vibrate stroke of beam of the Liang Hehou that promptly before vibrates is 5mm or 6mm; Can be suitable for the paving operation of great majority operating mode commonly used; Particularly compare, not only saved the required eccentric bushing of stroke governor motion, simplified the tamping equipment structure with two tamping equipments of traditional structure; It is simpler to make installation; Also be convenient to guarantee same tamping equipment before the vibrate stroke of beam of Liang Hehou that vibrates consistent, and can effectively eliminate the reciprocal inertia force that two tamping equipments produce in motion process, improved the machine functional performance; Guarantee that service behaviour is more reliable, and then guarantee the pavement spread quality.
3, the scope of application is wide, and the utility model is not only configurable on the section of foundation screed and lengthening section screed of the flared crossing screed of machinery, and is also configurable on the basic segment screed and lengthening section screed of hydraulic telescopic type screed.
Through accompanying drawing and embodiment, the utility model is done further detailed description below.
Description of drawings
Fig. 1 is the structural representation of first kind of specific embodiment of the utility model.
Fig. 2 is the structural representation of eccentric shaft in first kind of specific embodiment of the utility model.
Fig. 3 is installed in the left view on the screed casing for first kind of specific embodiment of the utility model.
Fig. 4 is the structural representation of second kind of specific embodiment of the utility model.
Fig. 5 is the structural representation of eccentric shaft in second kind of specific embodiment of the utility model.
Description of reference numerals:
1-transmission joint; 2-left back the bearing support that vibrates; 3-left back the bearing that vibrates;
4-left side supporting bearing base; 5-left side spring bearing; The left front bearing support that vibrates of 6-;
7-left front the bearing that vibrates; 8-1-center non-eccentricity section; 8-2-left inboard eccentric segment;
8-3-Right Inboard eccentric segment; 8-4-left-external side eccentric segment; 8-5-the outside, right side eccentric segment;
8-6-left side non-eccentricity section; 8-7-first right side non-eccentricity section;
8-8-second right side non-eccentricity section; 9-right front the bearing support that vibrates;
10-right front the bearing that vibrates; 11-right supporting bearing base; 12-right spring bearing;
13-right back the bearing support that vibrates; 14-right back the bearing that vibrates; 15-main drive;
16-preceding the beam that vibrates; 17-after the beam that vibrates; 18-lengthening section screed casing;
19-1-first bolt; 19-2-second bolt.
The specific embodiment
As shown in Figure 1, a kind of two tamping equipments of asphalt paver that wait stroke comprise eccentric shaft and are installed in preceding tamping equipment, back tamping equipment, left fixed support part and the right fixed support part on the said eccentric shaft.
As shown in Figure 2; Said eccentric shaft comprises and setting gradually from left to right and interconnective left-external side eccentric segment 8-4, left side non-eccentricity section 8-6, left inboard eccentric segment 8-2, center non-eccentricity section 8-1, Right Inboard eccentric segment 8-3, the first right side non-eccentricity section 8-7 and right outside eccentric segment 8-5; Identical and the eccentric throw of the eccentric direction of said left-external side eccentric segment 8-4 and right outside eccentric segment 8-5 is e1; Identical and the eccentric throw of the eccentric direction of inboard eccentric segment 8-2 in a said left side and Right Inboard eccentric segment 8-3 is e2; Said e1=e2; The eccentric direction of said left-external side eccentric segment 8-4 and left inboard eccentric segment 8-2 is opposite, and the eccentric direction of said right outside eccentric segment 8-5 and Right Inboard eccentric segment 8-3 is opposite, and tamping equipment and back tamping equipment differ 180 ° on the phase place before making like this when vibration.
As shown in Figure 1; Beam 16, the left front bearing 7 that vibrates, the right front bearing 10 that vibrates, left front bearing support 6 and the right front bearing support 9 that vibrates of vibrating vibrate before tamping equipment comprises before said; The said left front bearing support 6 that vibrates is socketed on the left inboard eccentric segment 8-2 through the left front bearing 7 that vibrates; The said right front bearing support 9 that vibrates is socketed on the Right Inboard eccentric segment 8-3 through the right front bearing 10 that vibrates, and said left front bottom of vibrating bearing support 6 and the right front bearing support 9 that vibrates all is fixedly connected with the beam 16 that before vibrates through the first bolt 19-1.
As shown in Figure 1; Beam 17, the left back bearing 3 that vibrates, the right back bearing 14 that vibrates, left back bearing support 2 and the right back bearing support 13 that vibrates of vibrating vibrate after said back tamping equipment comprises; The said left back bearing support 2 that vibrates is socketed on the left-external side eccentric segment 8-4 through the left back bearing 3 that vibrates; The said right back bearing support 13 that vibrates is socketed on the right outside eccentric segment 8-5 through the right back bearing 14 that vibrates, the bottom of said left back vibrate bearing support 2 and the right back bearing support 13 that vibrates all through the second bolt 19-2 with after the beam 17 that vibrates be fixedly connected.
As shown in Figure 1, said left fixed support portion branch comprises left spring bearing 5 and left supporting bearing base 4, and said left supporting bearing base 4 is socketed on the non-eccentricity section 8-6 of left side through left spring bearing 5; Said right fixed support portion branch comprises right spring bearing 12 and right supporting bearing base 11, and said right supporting bearing base 11 is socketed on the first right side non-eccentricity section 8-7 through right spring bearing 12.During use, with left supporting bearing base 4 and right supporting bearing base 11 all through being bolted on the screed casing 18.
In the present embodiment, said e1=e2=2.5mm or e1=e2=3mm, the stroke that promptly vibrates is 5mm or 6mm.
As shown in Figure 2, said left-external side eccentric segment 8-4 and right outside eccentric segment 8-5 are symmetrical set, and the said left side non-eccentricity section 8-6 and the first right side non-eccentricity section 8-7 are symmetrical set, and inboard eccentric segment 8-2 in a said left side and Right Inboard eccentric segment 8-3 are symmetrical set.
As shown in Figure 1, vibrate before said beam 16 with after the beam 17 that vibrates laterally arrange.
The operating principle of present embodiment is: present embodiment is fit to be installed on the lengthening section screed casing of paver; During use; Through bolt left supporting bearing base 4 and right supporting bearing base 11 all are fixed on the lengthening section screed casing (as shown in Figure 3), and all fixedly mount transmission joint 1 (like shaft coupling) at the left end of eccentric shaft 8 and right-hand member and can use.During work; Transmission joint 1 is through linking to each other and obtain power with active tamping equipment (like the transmission joint among the embodiment 2 1) or power set (being adjacent the transmission joint of the two tamping equipments of asphalt paver that are provided with and are installed on the lengthening section screed casing); Thereby drive eccentric shaft 8 rotations; And then force be installed on the eccentric shaft 8 before vibrate beam 16 with after the beam 17 that vibrates pump and swing; Vibrate before making beam 16 with after the vibrate lower end of beam 17 loose compound is constantly impacted, and then realize tentatively closely knit to compound, to reach the compaction requirement of paving layer.In the present embodiment; Because eccentric shaft 8 has design feature as shown in Figure 2; Therefore determined through the left front bearing 7 that vibrates be socketed in left inboard eccentric segment 8-2 and through the right front bearing 10 that vibrates be socketed in preceding tamping equipment bottom on the Right Inboard eccentric segment 8-3 before the beam 16 that vibrates; Be socketed in through the left back bearing 3 that vibrates left-external side eccentric segment 8-4 and through the right back bearing 14 that vibrates be socketed on the right outside eccentric segment 8-5 after the beam 17 that vibrates make stroke all the time and equate; And phase difference is 180 ° reciprocating motion, thus vibrate before making beam 16 with after the reciprocal inertia force equal and opposite in direction that beam 17 produces that vibrates, in the opposite direction; Can effectively cancel out each other, and then the negative interference of screed generation and the influence of bad vibration are reduced greatly.
Like Fig. 4 and shown in Figure 5, what present embodiment and embodiment 1 were different is: said eccentric shaft also comprises the second right side non-eccentricity section 8-8 that is arranged on right outside eccentric segment 8-5 right-hand member, the said second right side non-eccentricity section 8-8 with right outside eccentric segment 8-5 be connected.During actual fabrication, said left-external side eccentric segment 8-4, left side non-eccentricity section 8-6, left inboard eccentric segment 8-2, center non-eccentricity section 8-1, Right Inboard eccentric segment 8-3, the first right side non-eccentricity section 8-7, right outside eccentric segment 8-5 and the second right side non-eccentricity section 8-8 are one-body molded.Present embodiment is fit to be installed on the section of foundation screed of paver; During work; Through bolt left supporting bearing base 4 all is fixed on the screed casing 18 with right supporting bearing base 11; And, can use at the right-hand member fixed installation main drive 15 (like belt pulley) of eccentric shaft 8 at the left end of eccentric shaft 8 fixed installation transmission joint 1 (like shaft coupling).In the present embodiment, the structure of remainder, annexation and operating principle are all identical with embodiment 1.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any restriction; Every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of the utility model technical scheme.
Claims (9)
1. the two tamping equipments of asphalt paver that wait stroke is characterized in that: comprise eccentric shaft and be installed in preceding tamping equipment, back tamping equipment, left fixed support part and the right fixed support part on the said eccentric shaft; Said eccentric shaft comprises and setting gradually from left to right and interconnective left-external side eccentric segment (8-4), left side non-eccentricity section (8-6), left inboard eccentric segment (8-2), center non-eccentricity section (8-1), Right Inboard eccentric segment (8-3), the first right side non-eccentricity section (8-7) and right outside eccentric segment (8-5); Identical and the eccentric throw of the eccentric direction of said left-external side eccentric segment (8-4) and right outside eccentric segment (8-5) is e1; Identical and the eccentric throw of the eccentric direction of inboard eccentric segment in a said left side (8-2) and Right Inboard eccentric segment (8-3) is e2; Said e1=e2; The eccentric direction of said left-external side eccentric segment (8-4) and left inboard eccentric segment (8-2) is opposite, and the eccentric direction of said right outside eccentric segment (8-5) and Right Inboard eccentric segment (8-3) is opposite.
2. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of claim 1; It is characterized in that: beam (16), the left front bearing that vibrates (7), the right front bearing that vibrates (10), the left front bearing support that vibrates (6) and the right front bearing support that vibrates (9) vibrate before tamping equipment comprises before said; The said left front bearing support that vibrates (6) is socketed on the left inboard eccentric segment (8-2) through the left front bearing that vibrates (7); The said right front bearing support that vibrates (9) is socketed on the Right Inboard eccentric segment (8-3) through the right front bearing that vibrates (10), and the bottom of said left front bearing support that vibrates (6) and the right front bearing support that vibrates (9) all is fixedly connected with the beam that before vibrates (16) through first bolt (19-1).
3. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of claim 2; It is characterized in that: beam (17), the left back bearing that vibrates (3), the right back bearing that vibrates (14), the left back bearing support that vibrates (2) and the right back bearing support that vibrates (13) vibrate after said back tamping equipment comprises; The said left back bearing support that vibrates (2) is socketed on the left-external side eccentric segment (8-4) through the left back bearing that vibrates (3); The said right back bearing support that vibrates (13) is socketed on the right outside eccentric segment (8-5) through the right back bearing that vibrates (14), the bottom of said left back bearing support that vibrates (2) and the right back bearing support that vibrates (13) all through second bolt (19-2) with after the beam (17) that vibrates be fixedly connected.
4. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of claim 3; It is characterized in that: said left fixed support portion branch comprises left spring bearing (5) and left supporting bearing base (4), and said left supporting bearing base (4) is socketed on the left side non-eccentricity section (8-6) through left spring bearing (5); Said right fixed support portion branch comprises right spring bearing (12) and right supporting bearing base (11), and said right supporting bearing base (11) is socketed on the first right side non-eccentricity section (8-7) through right spring bearing (12).
5. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of any claim among the claim 1-4, it is characterized in that: said e1=e2=2.5mm or e1=e2=3mm.
6. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of any claim among the claim 1-4; It is characterized in that: said eccentric shaft also comprises the second right side non-eccentricity section (8-8) that is arranged on right outside eccentric segment (8-5) right-hand member, and the said second right side non-eccentricity section (8-8) is connected with right outside eccentric segment (8-5).
7. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of any claim in the claim 6, it is characterized in that: said left-external side eccentric segment (8-4), left side non-eccentricity section (8-6), left inboard eccentric segment (8-2), center non-eccentricity section (8-1), Right Inboard eccentric segment (8-3), the first right side non-eccentricity section (8-7), right outside eccentric segment (8-5) and second right side non-eccentricity section (8-8) are one-body molded.
8. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of any claim among the claim 1-4; It is characterized in that: said left-external side eccentric segment (8-4) and right outside eccentric segment (8-5) are symmetrical set; The said left side non-eccentricity section (8-6) and first right side non-eccentricity section (8-7) are symmetrical set, and inboard eccentric segment in a said left side (8-2) and Right Inboard eccentric segment (8-3) are symmetrical set.
9. according to the described a kind of two tamping equipments of asphalt paver that wait stroke of claim 3, it is characterized in that: the beam that vibrates before said (16) and after the beam (17) that vibrates laterally arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296065 CN202610691U (en) | 2012-06-23 | 2012-06-23 | Equal-stroke asphalt paver double-vibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220296065 CN202610691U (en) | 2012-06-23 | 2012-06-23 | Equal-stroke asphalt paver double-vibration device |
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| Publication Number | Publication Date |
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| CN202610691U true CN202610691U (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220296065 Withdrawn - After Issue CN202610691U (en) | 2012-06-23 | 2012-06-23 | Equal-stroke asphalt paver double-vibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720116A (en) * | 2012-06-23 | 2012-10-10 | 长安大学 | Equal-stroke double-vibrating device of asphalt spreading machine |
-
2012
- 2012-06-23 CN CN 201220296065 patent/CN202610691U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720116A (en) * | 2012-06-23 | 2012-10-10 | 长安大学 | Equal-stroke double-vibrating device of asphalt spreading machine |
| CN102720116B (en) * | 2012-06-23 | 2015-08-12 | 长安大学 | A kind of asphalt paver pair tamping equipment waiting stroke |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121219 Effective date of abandoning: 20150812 |
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| RGAV | Abandon patent right to avoid regrant |