CN104452559B - Milling machine as well as milling drum and quick-change cutter holder system thereof - Google Patents
Milling machine as well as milling drum and quick-change cutter holder system thereof Download PDFInfo
- Publication number
- CN104452559B CN104452559B CN201410568242.0A CN201410568242A CN104452559B CN 104452559 B CN104452559 B CN 104452559B CN 201410568242 A CN201410568242 A CN 201410568242A CN 104452559 B CN104452559 B CN 104452559B
- Authority
- CN
- China
- Prior art keywords
- quick
- tool rest
- change tool
- quick change
- milling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
- E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
- E01C23/088—Rotary tools, e.g. milling drums
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Milling Processes (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a quick-change tool holder system. The quick-change cutter holder system comprises a cutter, a quick-change cutter holder and a base which are arranged in sequence, wherein the first end of the quick-change cutter holder is provided with a mounting hole for mounting the cutter; the cutter is arranged in the mounting hole; the base is provided with a base hole; the second end of the quick-change cutter holder penetrates through the base hole; and the quick-change cutter holder is in taper fit with the base to self-lock. Compared with the prior art, the quick-change cutter holder system has the advantage that because the quick-change cutter holder is in taper fit with the base to self-lock, the quick-change cutter holder can be prevented from rotating in the base hole of the base. The quick-change cutter holder system is simple in structure and is convenient to assemble, disassemble and maintain, and the fixation of the quick-change cutter holder is realized, hereby the rotation of the quick-change cutter holder in the base can be prevented, the abrasion can be reduced and the reliability of the quick-change cutter holder can be improved. Moreover, the invention further discloses a milling drum provided with the quick-change cutter holder and a milling machine.
Description
Technical field
The present invention relates to field of road engineering machinery field, particularly to a kind of knife holder quick changing system and to be equiped with this fast
The milling and planing drum of tool changing base system and milling machine.
Background technology
Milling machine is one of main machine of maintenance of surface operation, for the rut of bituminous paving, carbuncle bag,
The infringements such as be full of cracks carry out maintenance work, i.e. by all multicutters being arranged on milling rotor, the road of corrupted
Facing cut slicing is whittled into broken shape, in order to again repaired on road surface after removing.Be arranged on milling rotor is many
Tool apron device, is generally made up of fixed pedestal and cutter, and cutter is directly installed in base aperture.Cutting operation
During, cutter completes the cutting of road pavement by the rotary motion of milling rotor, cuts during cutter work
Cut, while rotating around own axes in pedestal installing hole.Cutter fixed by the commonly used hold-down bolt of prior art
Base device, and hold-down bolt is generally held on pedestal, pedestal is typically welded to the tubular barrel of milling rotor
On, it is difficult to change.
The Chinese patent of Application No. CN201110362030.3 discloses a kind of quick-change tool holder system,
It includes the base part with quick-change tool holder jack and is configured for insertion into quick-change tool guarantor
Holding the quick-change tool holder in frame jack, described quick-change tool holder has cutting tool jack.This is fast
Change tool holder and include the cutting tool jack for justifying handle pick with longitudinal axis, wherein, quick change work
Tool retainer has supporting mass and pedestal retained part, and described pedestal retained part keeps relative to quick-change tool
Frame direction of insertion in base part is radially projecting, and projection in an insertion direction, in insert state, institute
Stating pedestal retained part and clamp the supporting projections on described base part, described pedestal retained part has relatively
Tilt extend and intersect contact surface at an angle with described longitudinal axis in described longitudinal axis.Above-mentioned soon
Change in tool holder system pedestal retained part to install and processing is more complicated, reliability it is difficult to ensure that.
In sum, how to provide a kind of simple in construction, easy for assembly, disassembly and maintenance, tool rest reliability is the fastest
Tool changing base system and be provided with milling and planing drum and the milling machine of this knife holder quick changing system, has become those skilled in the art
The problem needing solution badly.
Summary of the invention
In view of this, the present invention proposes a kind of knife holder quick changing system and is provided with the milling of this knife holder quick changing system
Drum and milling machine, more complicated to solve the processing of existing knife holder quick changing system, grip poor, the reliability of tool rest
Poor problem.
On the one hand, the invention provides a kind of knife holder quick changing system, including including cutter, quick change tool rest and pedestal,
Described cutter, quick change tool rest and pedestal order set gradually, and the first end of described quick change tool rest is provided with for pacifying
Filling the installing hole of described cutter, described cutter is placed in in described installing hole, and described pedestal is provided with base aperture,
Second end of described quick change tool rest passes described base aperture, and described quick change tool rest is used with described pedestal taper fit
In self-locking.
Further, described quick change tool rest includes that cone, described cone are placed in described base aperture, described base
Bore is inverted cone-shaped structure, and described base aperture is identical with the cone angle of described cone.
Further, described installing hole has longitudinal axis, and the taper shank of described quick change tool rest has axis of rotation,
Described longitudinal axis is the most coaxial with axis of rotation.
Further, described knife holder quick changing system also includes the clamp device for locking quick change tool rest, described
Second end of quick change tool rest is piercing in outside base aperture, and described clamp device is placed in the second of described quick change tool rest
End.
Further, described knife holder quick changing system also includes the packing ring being placed between clamp device and pedestal, institute
State gasket sleeve and be located at the second end of described quick change tool rest.
Further, the second end of described quick change tool rest is helicitic texture, and described clamp device is nut.
Further, described quick change tool rest and/or described pedestal are provided with discharge gate, and described discharge gate is for fast
Quick-detach cutter or cutter is cooled down.
Further, described quick change tool rest is provided with backstopping assembly, and described pedestal connects with described quick change tool rest
Contacting surface is provided with boss, and described backstopping assembly is provided with the groove matched with described boss, described boss with
Described fit depressions is used for preventing quick change tool rest from rotating.
In sum, a kind of knife holder quick changing system that the present invention provides, including the cutter set gradually, quick change
Tool rest and pedestal, described cutter, quick change tool rest and pedestal order set gradually, the first of described quick change tool rest
End be provided with the installing hole for installing described cutter, described cutter be placed in in described installing hole, described pedestal
Being provided with base aperture, the second end of described quick change tool rest passes described base aperture, and described quick change tool rest is with described
Pedestal taper fit is used for self-locking.Compared to existing technologies, in above-mentioned knife holder quick changing system quick change tool rest with
Pedestal uses taper fit for self-locking, it is to avoid quick change tool rest rotates in the base aperture of pedestal, simple in construction,
Mounting or dismounting are easy to maintenance, are simultaneously achieved the fixing of quick change tool rest, prevent it from rotating in pedestal, reduce mill
Damage, improve the reliability of quick change tool rest.
On the other hand, the present invention also provides for a kind of milling and planing drum, including cylinder and knife holder quick changing system, described soon
Tool changing base system is fixing on which cylinder, and described knife holder quick changing system is the Rapid replacing cutter on it described in any one
Base system.
Further, the quantity of described knife holder quick changing system is multiple, and described knife holder quick changing system passes through pedestal
Fix on which cylinder, multiple described pedestal the most helically the linear alignments.
Another further aspect, a kind of milling machine, including frame with for the milling equipment of milling material, described milling
Device is provided with case assembly and milling and planing drum, and described milling and planing drum is arranged in case assembly, it is characterised in that
Described milling and planing drum is milling and planing drum described on it.
Above-mentioned milling and planing drum and milling machine obviously have whole beneficial effects of knife holder quick changing system, the most superfluous at this
State.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.At accompanying drawing
In:
Fig. 1 is the exploded perspective view of knife holder quick changing system of the present invention；
Fig. 2 is the cross-sectional schematic of knife holder quick changing system of the present invention；
Fig. 3 is the cross-sectional schematic of quick change tool rest in knife holder quick changing system of the present invention；
Fig. 4 is the structural representation of pedestal in knife holder quick changing system of the present invention.
Description of reference numerals
1 cutter 2 quick change tool rest 3 pedestal
4 packing ring 5 nut 6 discharge gates
7 backstopping assembly A1 longitudinal axis A2 axiss of rotation
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment
Can be mutually combined.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
For sake of convenience, hereinafter alleged "left", "right", " on ", " left " of D score and accompanying drawing itself,
" right ", " on ", D score direction consistent.
Below in conjunction with Fig. 1 to Fig. 4, the preferred embodiments of the present invention are described in further detail.
As depicted in figs. 1 and 2, the invention provides a kind of knife holder quick changing system, including cutter 1, quick change
Tool rest 2 and pedestal 3, above-mentioned cutter 1, quick change tool rest 2 and pedestal 3 set gradually, quick change tool rest 2 upper
End is provided with the installing hole for installing cutter 1, and cutter 1 is placed in in this installing hole, and pedestal 3 is provided with base
Bore, the lower end of quick change tool rest 2 passes this base aperture, and this base aperture is taper hole, near quick change tool rest 2
One end is major part (i.e. the upper end of base aperture is major part), in inverted cone-shaped structure, and quick change tool rest 2 and pedestal 3
Taper fit can prevent quick change tool rest 2 from rotating, and for self-locking, to realize the fixing of quick change tool rest 2, reduces
The loss of quick change tool rest 2 and pedestal 3.It should be noted that quick change tool rest 2 preferably employs with pedestal 3
Morse's taper coordinates.
Further, in the present invention, quick change tool rest 2 includes cone and taper shank, taper shank is fixing with cone be connected or
Being an overall structure, taper shank may be provided at upper end or the side of vertebral body.Specifically, this cone is also inverted cone
Structure, the upper end of cone is major part, and lower end is microcephaly, and this cone is placed in the taper hole of above-mentioned inverted cone-shaped structure,
And this taper hole is identical with the cone angle of cone in quick change tool rest 2, to ensure that the cone angle in said base hole controls certainly
Within the locking angle.It should be noted that in quick change tool rest 2, the cone angle of vertebral body is Self-locking angle in the present invention.
As it is shown on figure 3, above-mentioned installing hole has longitudinal axis A1, the taper shank of quick change tool rest 2 has gyroaxis
Line A2, longitudinal axis A1 are the most coaxial with axis of rotation A2, and above-mentioned setting can increase the transversal of taper shank
Area, improves the intensity of quick change tool rest 2.
On the one hand for convenience of dismounting quick change tool rest 2 quickly, on the other hand it is preferably to lock quick change tool rest 2,
In the present invention, knife holder quick changing system also includes the clamp device for locking quick change tool rest 2, quick change tool rest 2
Lower end is piercing in outside said base hole, and clamp device is arranged at the lower end of quick change tool rest 2.Specifically, soon
Also can be provided with packing ring 4 in tool changing base system, this packing ring 4 is placed between clamp device and pedestal 3, this packing ring 4
Being preferably conical spring washer, this conical spring washer is sheathed on the lower end of quick change tool rest 2.Need explanation
Being that the lower end of quick change tool rest 2 is preferably helicitic texture, clamp device is preferably nut 5, and nut 5 is sheathed
On the screw thread position of quick change tool rest 2 lower end, it is used for fastening quick change tool rest 2.
Meanwhile, for preferably locking quick change tool rest 2 and pedestal 3, as it is shown in figure 1, set on quick change tool rest 2
Have backstopping assembly 7, backstopping assembly 7 can be a part for quick change tool rest 2 also can be single parts, pedestal 3
It is provided with boss, the lower surface of backstopping assembly 7 with the contact surface (upper surface of pedestal 3) of quick change tool rest 2
Being provided with the groove matched with this boss, above-mentioned boss and fit depressions are used for preventing quick change tool rest 2 from existing
Rotate in the base aperture of pedestal 3.
As shown in Figure 1 and Figure 4, quick change tool rest 2, and/or pedestal 3 are additionally provided with discharge gate 6, discharge gate 6
In addition to can be used for fast quick-detach cutter 1, spray into condensing agent also by this discharge gate 6 or water reduces cutter
The temperature of 1, cools down it.
In sum, a kind of knife holder quick changing system that the present invention provides, including the cutter 1 set gradually, soon
Tool changing seat 2 and pedestal 3, the upper end of quick change tool rest 2 is provided with the installing hole for installing cutter 1, cutter 1
Being placed in in this installing hole, pedestal 3 is provided with base aperture, and the lower end of quick change tool rest 2 passes this base aperture,
Said base hole is inverted cone-shaped structure, and quick change tool rest 2 and pedestal 3 taper fit are for self-locking.Compare existing
For technology, in above-mentioned knife holder quick changing system, quick change tool rest 2 and pedestal 3 use taper fit, each other
Can engage well, for self-locking, simple in construction, mounting or dismounting are easy to maintenance, can realize quick change tool rest simultaneously
2 fix, prevents it from rotating in pedestal 3；Additionally, base aperture and the cone angle of cone in quick change tool rest 2
Identical, control, within the scope of Self-locking angle, to reduce abrasion by the cone angle of base aperture, improve quick change tool rest
The reliability of 2.
On the other hand, present invention also offers a kind of milling and planing drum, including cylinder and knife holder quick changing system, quick change
Tool rest system is fixed on cylinder, and knife holder quick changing system is knife holder quick changing system described on it.Specifically,
The quantity of knife holder quick changing system is multiple, and knife holder quick changing system is fixed on cylinder by pedestal 3, Duo Geji
Seat 3 on cylinder helically the linear alignment, i.e. knife holder quick changing system helically the linear alignment on cylinder.
Another further aspect, present invention also offers a kind of milling machine, including frame with for the milling of milling material
Device, milling equipment is provided with case assembly and milling and planing drum, and this milling and planing drum is arranged in case assembly, described
Milling and planing drum is milling and planing drum described on it.
Above-mentioned milling and planing drum and milling machine obviously have whole beneficial effects of knife holder quick changing system in the present invention,
This repeats no more.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included in this
Within bright protection domain.
Claims (9)
1. a knife holder quick changing system, including cutter (1), quick change tool rest (2) and pedestal (3), described
Cutter (1), quick change tool rest (2) and pedestal (3) order set gradually, it is characterised in that described quick change
First end of tool rest (2) is provided with the installing hole for installing described cutter (1), and described cutter (1) is placed in
In described installing hole, described pedestal (3) is provided with base aperture, and the second end of described quick change tool rest (2) is worn
Crossing described base aperture, described quick change tool rest and described pedestal taper fit are for self-locking；
Described installing hole has longitudinal axis (A1), and the taper shank of described quick change tool rest (2) has axis of rotation
(A2), described longitudinal axis (A1) is the most coaxial with axis of rotation (A2)；
Described knife holder quick changing system also includes the clamp device for locking quick change tool rest (2), described Rapid replacing cutter
Second end of seat (2) is piercing in outside described base aperture, and described clamp device is placed in described quick change tool rest (2)
The second end.
Knife holder quick changing system the most according to claim 1, it is characterised in that described quick change tool rest (2)
Including cone, described cone is placed in described base aperture, and described base aperture is inverted cone-shaped structure, described pedestal
Hole is identical with the cone angle of described cone.
Knife holder quick changing system the most according to claim 1, it is characterised in that described quick change tool rest (2)
System also includes the packing ring (4) being placed between clamp device and pedestal (3), and described packing ring (4) is sheathed on
Second end of described quick change tool rest (2).
Knife holder quick changing system the most according to claim 1, it is characterised in that described quick change tool rest (2)
The second end be helicitic texture, described clamp device is nut (5).
Knife holder quick changing system the most according to claim 1, it is characterised in that described quick change tool rest (2)
And/or described pedestal (3) is provided with discharge gate (6), described discharge gate (6) is used for fast quick-detach cutter (1)
Or cutter (1) is cooled down.
Knife holder quick changing system the most according to claim 1, it is characterised in that described quick change tool rest (2)
Also include that backstopping assembly (7), described pedestal (3) are provided with convex with the contact surface of described quick change tool rest (2)
Platform, described backstopping assembly (7) is provided with the groove matched with described boss, described boss and described groove
Match for preventing quick change tool rest (2) from rotating.
7. a milling and planing drum, including cylinder and knife holder quick changing system, described knife holder quick changing system is fixed on described
On cylinder, it is characterised in that described knife holder quick changing system is for according to according to any one of claim 1 to 6
Knife holder quick changing system.
Milling and planing drum the most according to claim 7, it is characterised in that the quantity of described knife holder quick changing system
For multiple, described knife holder quick changing system is fixing on which cylinder by pedestal (3), multiple described pedestals (3)
The most helically the linear alignment.
9. a milling machine, including frame with for the milling equipment of milling material, described milling equipment sets
Case assembly and milling and planing drum, described milling and planing drum is had to be arranged in case assembly, it is characterised in that described milling
Drum is the milling and planing drum described in claim 7 or 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410568242.0A CN104452559B (en) | 2014-10-23 | 2014-10-23 | Milling machine as well as milling drum and quick-change cutter holder system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410568242.0A CN104452559B (en) | 2014-10-23 | 2014-10-23 | Milling machine as well as milling drum and quick-change cutter holder system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104452559A CN104452559A (en) | 2015-03-25 |
| CN104452559B true CN104452559B (en) | 2017-01-11 |
Family
ID=52899260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410568242.0A Active CN104452559B (en) | 2014-10-23 | 2014-10-23 | Milling machine as well as milling drum and quick-change cutter holder system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104452559B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714664B (en) * | 2016-03-15 | 2018-12-11 | 湖南三一路面机械有限公司 | Quick change chisel holder system, milling and planing drum and milling machine |
| CN106087683A (en) * | 2016-07-29 | 2016-11-09 | 苏州凯通工程机械有限公司 | A kind of Novel milling machine tool rest base systems |
| CN107201714A (en) * | 2017-07-26 | 2017-09-26 | 徐州徐工筑路机械有限公司 | A kind of milling machine knife holder mechanism able to quickly change |
| CN109024204A (en) * | 2018-09-10 | 2018-12-18 | 徐州徐工筑路机械有限公司 | Milling machine covers system with tooth |
| CN109763412A (en) * | 2018-12-29 | 2019-05-17 | 瑞安市飞翔机械部件有限公司 | Milling machine toothholder and tooth cover mounting structure |
| CN109944144A (en) * | 2019-04-08 | 2019-06-28 | 苏州五元素机械制造有限公司 | A kind of quick-change tool holder system |
| CN112832099B (en) * | 2019-11-22 | 2022-07-22 | 北京天顺长城液压科技有限公司 | Quick-change base device and milling drum comprising same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004030691B4 (en) * | 2004-06-24 | 2008-12-18 | Wirtgen Gmbh | Tool-holding device |
| DE102006029300B3 (en) * | 2006-06-23 | 2007-11-29 | Betek Bergbau- Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co. Kg | Round shaft chisel fits into chuck, in which it can rotate, inner contour of chuck and outer contour of shaft allowing chisel to swivel about its longitudinal axis |
| CN101537576B (en) * | 2009-04-20 | 2011-07-27 | 三一重工股份有限公司 | Cutter holding device and milling machine |
| CN201512744U (en) * | 2009-09-22 | 2010-06-23 | 西安宏大交通科技有限公司 | Quick-change tool apron device for milling rotor |
| DE102010044649A1 (en) * | 2010-09-07 | 2012-03-08 | Bomag Gmbh | Change-holder system for a chisel |
-
2014
- 2014-10-23 CN CN201410568242.0A patent/CN104452559B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104452559A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104452559B (en) | Milling machine as well as milling drum and quick-change cutter holder system thereof | |
| US8573707B2 (en) | Retainer sleeve and washer for cutting tool | |
| US9267373B2 (en) | Chisel holder and lower tool part for a chisel holder | |
| TW201529953A (en) | Tool rest and tool rest and tool combined structure | |
| AU2005256341B2 (en) | Tool holder | |
| US9901988B2 (en) | Tool receptacle for a screw-in tool | |
| TWI577879B (en) | A knife holder, a support for a tool holder, and a floor machine | |
| US20120001475A1 (en) | Cutter assembly configured to allow tool rotation | |
| KR20150043966A (en) | Modular carrier tool and tool head | |
| US9228434B2 (en) | Chisel holder | |
| RU2489233C2 (en) | Milling tool for machining with removal of chip | |
| US8770669B2 (en) | Cutting tool configuration having wear disc | |
| CN202240471U (en) | Workbench and machine tool | |
| US10677054B2 (en) | Cutting bit assembly | |
| CN204892970U (en) | Manual simple and easy turning device of major diameter work piece | |
| CN108825227B (en) | Cutting device of heading machine and heading machine | |
| US10968740B2 (en) | Interchangeable chisel holder | |
| CN211709708U (en) | Milling device and wet spraying machine | |
| CN106968157A (en) | A kind of milling tool keeper | |
| CN110978295A (en) | Milling device and wet spraying machine | |
| CN107503273A (en) | A kind of mounting system for ground cutting tool | |
| CN104385068A (en) | Arc relief angle tool of sharpener | |
| CN105619550A (en) | Milling cutter | |
| CN210080881U (en) | Sliding bearing lining tile scraping tool | |
| CN104416209A (en) | Processing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220323 Address after: 413000 Sany Yiyang Industrial Park, Eastern New District, Yiyang high tech Zone, Yiyang City, Hunan Province Patentee after: Hunan Sany Zhongyi Machinery Co.,Ltd. Address before: 410100 31 industrial city, Changsha economic and Technological Development Zone, Hunan Patentee before: HUNAN SANY ROAD MACHINERY Co.,Ltd. |