CN1766234A - Vibrating slab tamper - Google Patents
Vibrating slab tamper Download PDFInfo
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- CN1766234A CN1766234A CN 200510096400 CN200510096400A CN1766234A CN 1766234 A CN1766234 A CN 1766234A CN 200510096400 CN200510096400 CN 200510096400 CN 200510096400 A CN200510096400 A CN 200510096400A CN 1766234 A CN1766234 A CN 1766234A
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Abstract
The invention discloses a vibration flat rammer, which is characterized by the following: setting motor on the frame and armrest on the armrest seat; fixing flange on the motor; setting arm seat absorber and absorber protector between armrest seat and upper installment plate; fixing the loading system on the rack lower installment plate; setting pulley box with driving structure in connection with the motor and loading system on the installment flange; adapting front eccentric block, middle eccentric block and back eccentric block in the loading case to generate exciting force to compact ground foundation through motor driving system; setting lubrication system in the loading case to lubricate the operation part and reduce noise. The invention adapts universal joint as driving part, which avoids the rigidity driving shaft breakdown phenomenon.
Description
Technical field
The invention belongs to the making in road or other similar structure paving, machine, instrument or the auxiliary equipment technical field of reparation usefulness, be specifically related to vibratory plate compactor.
Background technology
At present, in the narrow location compacting of construction work, still be extensive use of the frog hammer of the development sixties, it simple in structure, cost of production is low.The major defect of frog hammer is that the compacting effect is relatively poor, can't satisfy instructions for use, requiring to spread soil thickness can not be dark, productivity ratio is not high, its eccentric block exposes, violated safety requirements, ram headstock bump, phenomenon of rupture often takes place in main stressed member, and the attachment bolt on its rammer headstock is also easily loosening under bump, causes eccentric block to fly out so that accident such as hurt sb.'s feelings as not running check meeting, in work progress, noise is big, particularly in the residential community construction, has become well-known public hazards.In addition, frog hammer in use big, the driving belt 15 of labor intensity of operating staff is subjected to that the eccentric block exciting force is periodically variable to influence easy inefficacy, need often to change, and dismounting is cumbersome.
Use on the building site at present vibratory plate compactor adopt two vibrating shaft vibrators, two vibrating shaft backwards rotation have limited the power of vibratory plate compactor.The structure setting mostly is the front portion that eccentric vibrator is arranged on complete machine, and power set are arranged on the rear portion of complete machine, and the weight of power set is greater than the weight of eccentric vibrator, and this easily causes complete machine distribution of weight inequality on structure is provided with, cause compacting inhomogeneous.
By battering ram produced in USA and dull and stereotyped rammer of single vibration and bidirectional plate rammer, volume is big, compacting speed is fast, compacting efficient height, these rammers can only be tamped on large-area ground, in the less tunnel of the ground of wall and the scope of operation, can't carry out operation, and these rammer selling prices are expensive.It is a kind of small-sized compacting rammer of development that current building engineering construction field needs a urgent technical problem that solves.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the shortcoming of above-mentioned compacting machine, provide a kind of reasonable in design, simple in structure, volume is little, in light weight, operation is light, compaction force is big, compacting is even, consolidation effect is good, cost of production is low vibratory plate compactor.
Solving the problems of the technologies described above the technical scheme that is adopted is: the frame upper mounting plate is provided with motor and the handrail that is installed on the armrest seat; motor is provided with mounting flange; be provided with armrest seat shock absorber and shock absorber protector between armrest seat and the upper mounting plate; the frame lower installation board is provided with load maintainer; mounting flange is provided with the belt roller box; be provided with the transmission mechanism that links with motor and load maintainer in the belt roller box, between frame upper mounting plate and frame lower installation board, be provided with shock absorber.
Transmission mechanism of the present invention comprises: be arranged on the driving wheel that connects with motor output shaft in the belt roller box, be arranged on next end of belt roller box and driven pulley links, the other end and load maintainer link universal joint, driving wheel and driven pulley link by belt.Load maintainer of the present invention is: vibrating shaft and middle vibrating shaft and after vibration axle before being provided with in loading housing, preceding vibrating shaft is provided with pre-eccentric piece and front gear, eccentric block and middle gear during middle vibrating shaft is provided with, the after vibration axle is provided with back eccentric block and backgear, middle vibrating shaft links by the other end of connector and universal joint, and front gear and backgear are meshed with middle gear.
The geometry of pre-eccentric piece of the present invention and identical, the component of structure of back eccentric block and measure-alike, weight is identical, the pre-eccentric piece is identical with the structure geometry identical, component of middle eccentric block, size is inequality, weight is inequality.Middle gear of the present invention is the identical gear of structure with front gear and backgear.
Pre-eccentric piece of the present invention is: the eccentric block mount pad is provided with eccentric block.
Eccentric block of the present invention be shaped as the semicircular ring body, axially be processed with keyway at the interior anchor ring of eccentric block.
The middle part of loading housing of the present invention is manufactured with working chamber h, the left and right sides is manufactured with by spattering the thermal dispersion oil cavity g that oilhole d and intercommunicating pore e and working chamber h link, in the thermal dispersion oil cavity g lubrication oil is housed, pre-eccentric piece, preceding vibrating shaft, front gear, middle gear, middle vibrating shaft, middle eccentric block, back eccentric block, after vibration axle, backgear are arranged in the working chamber h, the dead eye f upper shaft that loads housing to vertically be processed with the oil duct c that is connected, be processed with the oil groove b that is connected with oil duct c at the upper surface that loads housing.
Handrail shock absorber of the present invention and shock absorber are elastic body or elastic element.
Elastic body of the present invention is handrail rubber damping piece and rubber damping piece, and handrail rubber damping piece is identical or inequality with the structure of rubber damping piece.
Belt roller box of the present invention is: be processed with the motor output shaft hole on the top of casing, the bottom is processed with the universal joint installing hole, be processed with slotted hole a outside the motor output shaft hole, on casing, be processed with connection holes, be provided with belt roller box installing rack in the casing left and right sides.
Shock absorber protector of the present invention comprises: screw rod mount pad and be arranged on screw rod on the screw rod mount pad; two nuts are installed on the screw rod; below gap between nut and the armrest seat be 2～3mm, the gap between screw rod mount pad and the armrest seat is 2～3mm.
The present invention has adopted by motor and has driven pre-eccentric piece, middle eccentric block, back eccentric block rotation generation exciting force rammed subgrade by transmission mechanism, pre-eccentric piece, middle eccentric block, back eccentric block are installed in and load in the housing, in loading housing, be provided with lubricating system, running gear is lubricated, the noise that has been produced when having reduced operation, avoid the generation of dangerous accident, improved production efficiency.The present invention has adopted the drive disk assembly of universal joint as transmission mechanism, has avoided adopting common positive drive through-drive because of load maintainer vibration causing rigid shaft phenomenon of rupture.That the present invention has is reasonable in design, simple in structure, volume is little, in light weight, advantage such as operation is light, compaction force is big, compacting is even, consolidation effect is good, cost of production is low, can extensively promote the use of in construction work.
Description of drawings
Fig. 1 is the front view of one embodiment of the invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is that the C of Fig. 1 is to view.
Fig. 4 is the structural representation of Fig. 1 middle belt pulley case 3.
Fig. 5 is the A-A sectional view of Fig. 1.
Fig. 6 is the sectional view that loads housing 12-10 among Fig. 5.
Fig. 7 is the B-B sectional view of Fig. 6.
Fig. 8 is the structural representation of pre-eccentric piece 12-1 among Fig. 5,7.
The specific embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
In Fig. 1,2,3,4, the vibratory plate compactor of present embodiment is made of frame upper mounting plate 1, motor 2, belt roller box 3, armrest seat 4, screw rod 5, nut 6, handrail 7, screw rod mount pad 8, handrail rubber damping piece 9, rubber damping piece 10, frame lower installation board 11, load maintainer 12, mounting flange 13, driving wheel 14, belt 15, universal joint 16, driven pulley 17 connections.
On frame upper mounting plate 1 with the screw threads for fastening connector motor 2 that has been fixedly connected; on the motor 2 with the screw threads for fastening connector mounting flange 13 that has been fixedly connected; on the frame lower installation board 11 with the screw threads for fastening connector load maintainer 12 that has been fixedly connected; on frame upper mounting plate 1 with the screw threads for fastening connector armrest seat 4 that has been fixedly connected; between armrest seat 4 and the frame upper mounting plate 1 with the screw threads for fastening connector handrail rubber damping piece 9 that has been fixedly connected; handrail rubber damping piece 9 is an embodiment of armrest seat shock absorber; handrail rubber damping piece 9 is used to cushion the vibration force of load maintainer 12; on armrest seat 4 with the screw threads for fastening connector handrail 7 that is fixedly connected; handrail 7 is used for the operator to be operated the present invention and carries out operation; between armrest seat 4 and frame upper mounting plate 1, screw rod mount pad 8 is installed; screw rod 5 and fixing with two nuts 6 is installed on the screw rod mount pad 8; screw rod mount pad 8; screw rod 5; two nuts 6 connect formation shock absorber protector; leave 2～3mm gap between screw rod mount pad 8 and the armrest seat 4; below leave 2～3mm gap between nut 6 and the screw rod mount pad 8; the shock absorber protector is used to protect handrail rubber damping piece 9, prevents that handrail rubber damping piece 9 is damaged after being subjected to than big external force.In normal the use, the damping effect of handrail rubber damping piece 9 is unaffected.When the bigger elongation of handrail rubber damping piece 9 stressed generations, armrest seat 4 contacts with nut 6, prevents that handrail rubber damping piece 9 from damaging.When the bigger compression of handrail rubber damping piece 9 stressed generations, armrest seat 4 contacts with screw rod mount pad 8, prevents that handrail rubber damping piece 9 from damaging.On frame lower installation board 11 between frame upper mounting plate 1 and the frame lower installation board 11 with the screw threads for fastening connector rubber damping piece 10 that has been fixedly connected, rubber damping piece 10 is an embodiment of shock absorber, and rubber damping piece 10 is used to cushion the vibration force of load maintainer 12.On mounting flange 13 with the screw threads for fastening connector belt roller box 3 that has been fixedly connected.
The belt roller box 3 of present embodiment is made of casing 3-1, belt roller box installing rack 3-2 connection.The central upper portion position of casing 3-1 is processed with the motor output shaft hole, be processed with the connection screw on the excircle direction, the motor output shaft hole is used to install motor output shaft, the external symmetry of casing 3-1 upper motor output shaft hole be processed with 4 slotted hole a, slotted hole a is used for erection bolt casing 3-1 is connected with mounting flange 13, but by adjusting position adjusting tank body 3-1 the position on mounting flange 13 of bolt in slotted hole a, be processed with the connection screw at edge, the casing 3-1 left and right sides, be installed with belt roller box installing rack 3-2 in the casing 3-1 left and right sides with the screw threads for fastening connector, belt roller box installing rack 3-2 is fixedly connected with screw threads for fastening connector and frame upper mounting plate 1.Be processed with the universal joint installing hole in the bottom of casing 3-1, in belt roller box 3 transmission mechanism be installed, motor links by transmission mechanism and load maintainer 12.
The transmission mechanism of present embodiment is made of driving wheel 14, belt 15, driven pulley 17, universal joint 16 connections, on the output shaft of belt roller box 3 built-in motors 2, driving wheel 14 is installed with key connecting, in the universal joint installing hole of the bottom of belt roller box 3, universal joint 16 is installed, one end of universal joint 16 is with the connector driven pulley 17 that has been fixedly connected, driving wheel 14 links by belt 15 with driven pulley 17, and the tensioning of belt 15 can realize by the relative position of adjusting casing 3-1 and mounting flange 13.The transmission mechanism of present embodiment also can adopt the sprocket chain strip transmission mechanism, also can adopt gear drive.The other end of universal joint 16 and load maintainer 12 link, because the present invention has adopted universal joint 16 transmissions, have avoided adopting common positive drive through-drive to cause the positive drive axle fracture because of load maintainer 12 vibrations.
In Fig. 5, the load maintainer 12 of present embodiment is made of pre-eccentric piece 12-1, preceding vibrating shaft 12-2, front gear 12-3, middle gear 12-4, middle eccentric block 12-5, middle vibrating shaft 12-6, back eccentric block 12-7, after vibration axle 12-8, backgear 12-9, loading housing 12-10 connection.Vibrating shaft 12-2 and middle vibrating shaft 12-6 and after vibration axle 12-8 before in the middle part of loading housing 12-10, being equipped with, between preceding vibrating shaft 12-2 and middle vibrating shaft 12-6 and after vibration axle 12-8 and the loading housing 12-10 bearing is installed, preceding vibrating shaft 12-2 goes up and with connector pre-eccentric piece 12-1 and front gear 12-3 is installed, middle vibrating shaft 12-6 goes up with connector middle eccentric block 12-5 and middle gear 12-4 is installed, middle gear 12-4 is a driving gear, middle vibrating shaft 12-6 links by the other end of connector and universal joint 16, after vibration axle 12-8 goes up with connector back eccentric block 12-7 and backgear 12-9 is installed, middle gear 12-4 is meshed with front gear 12-3 and backgear 12-9, and front gear 12-3 and backgear 12-9 are driven gear.The driving force of motor 2 is through belt 15 and universal joint 16 transmissions, middle vibrating shaft 12-6 rotates, the middle gear 12-4 that is installed on the vibrating shaft 12-6 rotates, do the opposite rotation of direction with the front gear 12-3 and the backgear 12-9 of middle gear 12-4 engagement, vibrating shaft 12-2 and after vibration axle 12-8 backward rotation before driving, pre-eccentric piece 12-1 before being installed on the vibrating shaft 12-2 and the back eccentric block 12-7 that is installed in the middle eccentric block 12-5 on the middle vibrating shaft 12-6 and be installed on the after vibration axle 12-8 produce exciting force, with the ground compacting in operation place, this exciting force drives the vibratory plate compactor walking simultaneously.
At Fig. 6, in 7, the middle part that loads housing 12-10 is manufactured with working chamber h, the left and right sides is manufactured with thermal dispersion oil cavity g, working chamber h and thermal dispersion oil cavity g are by spattering oilhole d and intercommunicating pore e is connected, in the thermal dispersion oil cavity g lubrication oil is housed, pre-eccentric piece 12-1, preceding vibrating shaft 12-2, front gear 12-3, middle gear 12-4, middle vibrating shaft 12-6, middle eccentric block 12-5, back eccentric block 12-7, after vibration axle 12-8, backgear 12-9 is installed in the working chamber h, axially and vertically be processed with the oil duct c that links above the bearings mounted dead eye f of housing 12-10 loading, be processed with the oil groove b that links with oil duct c at the upper surface that loads housing 12-10, pre-eccentric piece 12-1, middle eccentric block 12-5, lubrication oil with working chamber h bottom when back eccentric block 12-7 rotates splashes the sidewall that loads housing 12-10, top and thermal dispersion oil cavity g, lubrication oil is through oil groove b, oil duct c is to loading housing 12-10 middle part dead eye f, vibrating shaft 12-2 before lubricated, middle vibrating shaft 12-6, the installation bearing of after vibration axle 12-8, and running gear dispelled the heat.Lubrication oil through heat radiation in the thermal dispersion oil cavity g enters working chamber h by intercommunicating pore e, to guarantee working chamber h enough oil masses is arranged.The present invention adopts this mode that running gear is dispelled the heat, bearing is lubricated, and bearing is being rotated under the lubricating condition all the time preferably, has improved the lubricant effect of bearing and the radiating effect of running gear.
In Fig. 8, the pre-eccentric piece 12-1 of present embodiment installs screw rod 12-1.3 connection by eccentric block mount pad 12-1.1, eccentric block 12-1.2, eccentric block to constitute.On eccentric block mount pad 12-1.1, screw rod 12-1.3 connection is installed eccentric block 12-1.2 formation pre-eccentric piece 12-1 is installed with eccentric block.Eccentric block 12-1.2 is shaped as the semicircular ring body, axially be processed with keyway at the interior anchor ring of eccentric block 12-1.2, keyway is used for fitting key links eccentric block 12-1.2 and preceding vibrating shaft 12-2, be processed with screw on the semicircle anchor ring of eccentric block 12-1.2, screw is used for the setting-up eccentricity piece screw rod 12-1.3 is installed.The structure of back eccentric block 12-7 and pre-eccentric piece 12-1 is identical, the geometry of component and measure-alike, weight is identical, middle eccentric block 12-5 is inequality with the structure geometry same size identical, component of pre-eccentric piece 12-1, weight is inequality, the rotating speed of pre-eccentric piece 12-1 and back eccentric block 12-7 and turn to identical, identical, the switched in opposite of rotating speed of pre-eccentric piece 12-1 and middle eccentric block 12-5, identical, the switched in opposite of rotating speed of back eccentric block 12-7 and middle eccentric block 12-5.
According to above-mentioned principle, also can design the vibratory plate compactor of another concrete structure, but all within protection scope of the present invention.
Claims (10)
1; a kind of vibratory plate compactor; it is characterized in that: frame upper mounting plate (1) is provided with motor (2) and is installed in handrail (7) on the armrest seat (4); motor (2) is provided with mounting flange (13); be provided with armrest seat shock absorber and shock absorber protector between armrest seat (4) and the upper mounting plate; frame lower installation board (11) is provided with load maintainer (12); mounting flange (13) is provided with belt roller box (3); be provided with the transmission mechanism that links with motor (2) and load maintainer (12) in the belt roller box (3), between frame upper mounting plate (1) and frame lower installation board (11), be provided with shock absorber.
2, the described vibratory plate compactor of claim 1, it is characterized in that said transmission mechanism comprises: be arranged on the driving wheel (14) that connects with motor (2) output shaft in the belt roller box (3), the universal joint (16) that be arranged on that next end of belt roller box (3) and driven pulley (17) link, the other end and load maintainer (12) links, driving wheel (14) links by belt (15) with driven pulley (17); Said load maintainer (12) is: be provided with preceding vibrating shaft (12-2) and middle vibrating shaft (12-6) and after vibration axle (12-8) in loading housing (12-10), preceding vibrating shaft (12-2) is provided with pre-eccentric piece (12-1) and front gear (12-3), middle vibrating shaft (12-6) is provided with middle eccentric block (12-5) and middle gear (12-4), after vibration axle (12-8) is provided with back eccentric block (12-7) and backgear (12-9), middle vibrating shaft (12-6) links by the other end of connector and universal joint (16), and front gear (12-3) and backgear (12-9) are meshed with middle gear (12-4).
3, according to the described vibratory plate compactor of claim 2, it is characterized in that: the geometry of said pre-eccentric piece (12-1) and identical, the component of structure of back eccentric block (12-7) and measure-alike, weight is identical, pre-eccentric piece (12-1) is identical with the structure geometry identical, component of middle eccentric block (12-5), and size is inequality, weight is inequality; Said middle gear (12-4) is the identical gear of structure with front gear (12-3) and backgear (12-9).
4, according to claim 2 or 3 described vibratory plate compactors, it is characterized in that said pre-eccentric piece (12-1) is: eccentric block mount pad (12-1.1) is provided with eccentric block (12-1.2).
5, according to the described vibratory plate compactor of claim 4, what it is characterized in that said eccentric block (12-1.2) is shaped as the semicircular ring body, axially is processed with keyway at the interior anchor ring of eccentric block (12-1.2).
6, according to the described vibratory plate compactor of claim 2, it is characterized in that: the middle part of said loading housing (12-10) is manufactured with working chamber h, the left and right sides is manufactured with by spattering the thermal dispersion oil cavity g that oilhole d and intercommunicating pore e and working chamber h link, in the thermal dispersion oil cavity g lubrication oil is housed, pre-eccentric piece (12-1), preceding vibrating shaft (12-2), front gear (12-3), middle gear (12-4), middle vibrating shaft (12-6), middle eccentric block (12-5), back eccentric block (12-7), after vibration axle (12-8), backgear (12-9) is arranged in the working chamber h, the dead eye f upper shaft that loads housing (12-10) to vertically be processed with the oil duct c that is connected, be processed with the oil groove b that is connected with oil duct c at the upper surface that loads housing (12-10).
7, according to the described vibratory plate compactor of claim 1, it is characterized in that: said handrail shock absorber and shock absorber are elastic body or elastic element.
8, according to the described vibratory plate compactor of claim 7, it is characterized in that: said elastic body is handrail rubber damping piece (9) and rubber damping piece (10), and handrail rubber damping piece (9) is identical or inequality with the structure of rubber damping piece (10).
9, according to claim 1 or 2 described vibratory plate compactors, it is characterized in that said belt roller box (3) is: the top at casing (3-1) is processed with the motor output shaft hole, the bottom is processed with the universal joint installing hole, be processed with slotted hole a outside the motor output shaft hole, on casing (3-1), be processed with connection holes, be provided with belt roller box installing rack (3-2) in casing (3-1) left and right sides.
10, according to the described vibratory plate compactor of claim 1; it is characterized in that said shock absorber protector comprises: screw rod mount pad (8) and be arranged on screw rod (5) on the screw rod mount pad (8); two nuts (6) are installed on the screw rod (5); below gap between a nut (6) and the armrest seat 4 be 2～3mm, the gap between screw rod mount pad (8) and the armrest seat 4 is 2～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100964008A CN100430554C (en) | 2005-11-22 | 2005-11-22 | Vibrating slab tamper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100964008A CN100430554C (en) | 2005-11-22 | 2005-11-22 | Vibrating slab tamper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1766234A true CN1766234A (en) | 2006-05-03 |
| CN100430554C CN100430554C (en) | 2008-11-05 |
Family
ID=36742323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100964008A Expired - Fee Related CN100430554C (en) | 2005-11-22 | 2005-11-22 | Vibrating slab tamper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100430554C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993593A (en) * | 2014-04-08 | 2014-08-20 | 北京市政路桥股份有限公司 | Small-clear-distance multi-hole large-diameter circular tube culvert tube-periphery padding punning machine |
| CN104164825A (en) * | 2014-08-28 | 2014-11-26 | 成都市容德建筑劳务有限公司 | Flat-plate compactor easy to move |
| CN104164826A (en) * | 2014-08-28 | 2014-11-26 | 成都市容德建筑劳务有限公司 | Anti-dusting flat-plate compactor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022010999A1 (en) | 2020-07-07 | 2022-01-13 | Milwaukee Electric Tool Corporation | Plate compactor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2295796Y (en) * | 1996-10-25 | 1998-10-28 | 甘肃省第一建筑机械制造厂 | Flat vibrator |
| SE513650C2 (en) * | 1999-02-03 | 2000-10-16 | Svedala Compaction Equipment A | Vibrator plate with adjustable vibrated handle |
| CN2525116Y (en) * | 2002-01-17 | 2002-12-11 | 徐州工程机械制造厂 | Vibrative wheel structure of composite vibrative road roller |
| US6929421B2 (en) * | 2002-12-20 | 2005-08-16 | Caterpillar Paving Products Inc. | Vibratory mechanism and method for lubricating the same |
| CN2703787Y (en) * | 2004-05-25 | 2005-06-08 | 威海地合工程机械科技有限责任公司 | Vibration-bearing lubricating device of vibration road roller |
| CN2837369Y (en) * | 2005-11-22 | 2006-11-15 | 长安大学 | Vibratory plate compactor |
-
2005
- 2005-11-22 CN CNB2005100964008A patent/CN100430554C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993593A (en) * | 2014-04-08 | 2014-08-20 | 北京市政路桥股份有限公司 | Small-clear-distance multi-hole large-diameter circular tube culvert tube-periphery padding punning machine |
| CN103993593B (en) * | 2014-04-08 | 2016-04-27 | 北京市政路桥股份有限公司 | The all filling tamped facility of small interval porous large-diameter circular pipe culverts pipe |
| CN104164825A (en) * | 2014-08-28 | 2014-11-26 | 成都市容德建筑劳务有限公司 | Flat-plate compactor easy to move |
| CN104164826A (en) * | 2014-08-28 | 2014-11-26 | 成都市容德建筑劳务有限公司 | Anti-dusting flat-plate compactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100430554C (en) | 2008-11-05 |
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Granted publication date: 20081105 Termination date: 20091222 |