CN113357291A - Mechanical multi-connecting-rod disc brake - Google Patents
Mechanical multi-connecting-rod disc brake Download PDFInfo
- Publication number
- CN113357291A CN113357291A CN202010146083.0A CN202010146083A CN113357291A CN 113357291 A CN113357291 A CN 113357291A CN 202010146083 A CN202010146083 A CN 202010146083A CN 113357291 A CN113357291 A CN 113357291A
- Authority
- CN
- China
- Prior art keywords
- brake
- swing arm
- caliper
- swing
- ball head
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/70—Rods
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses a mechanical multi-connecting-rod disc brake, which comprises a driving unit with a multi-connecting-rod structure and a brake unit with a caliper structure which are oppositely formed; the invention drives the brake cable to pull and drive the four-bar element of the multi-bar structure, and drives the two swing arms of the brake unit to drive the caliper piston to tightly brake relative to the disc brake disc by utilizing the multi-bar lever principle, so that the maximum force can be exerted at the lower initial point of controlling the brake, and the labor-saving effect is further achieved.
Description
Technical Field
The invention relates to a brake fixing structure, in particular to a mechanical multi-connecting-rod disc brake.
Background
According to the conventional bicycle, the brake block of the clamping type tightening mechanism is utilized to brake in a left-right tightening wheel frame manner, the bicycle brake system of the conventional multi-plate clamping type tightening mechanism cannot uniformly and symmetrically clamp the brake block arranged on the left-right clamping arm on the bicycle wheel frame because the force applied to the left-right clamping arm of the clamping type tightening mechanism by the side is not uniform, so that the force is not uniform when the tightening mechanism clamps, the clamping type tightening mechanism cannot be smoothly reset when not used, noise is easy to cause, the left brake block and the right brake block are not uniformly worn, and the safety is poor; in view of this, an author developed a conventional caliper fixing structure of taiwan patent No. M466835 "disc brake caliper fixing structure", in which the top ends of two pads are both provided with a concave arc portion, and the bottom ends of the two pads are respectively extended downward with two pins, when two bolts respectively penetrate through the two pads and screw-lock the caliper to the bicycle front fork, the two pins are inserted into the corresponding elliptical long holes of the caliper, and the outer arc portion of each bolt is tightly pressed against the concave arc portion of each pad, so that the boss block does not rotate relative to the elliptical long holes of the disc brake caliper; however, the conventional structure can not achieve better effort-saving effect when applying force to brake.
Therefore, in order to solve the problems of the conventional structure, how to develop an innovative structure with more ideal practicability, which is the invalids of consumers, is also the goal and direction of the related manufacturers to make research and development breakthroughs. Therefore, the inventor designs the components of the invention in detail based on many years of design experience and finally obtains the invention with practical applicability after practical and judicious evaluation.
Disclosure of Invention
The invention aims to provide a mechanical multi-connecting-rod disc brake, which can solve the defects in the prior art and has the advantages of simple structure, reasonable layout, high safety factor and labor saving.
Based on the above, the present invention mainly adopts the following technical means to achieve the above object.
A mechanical multi-link disc brake comprising: the brake unit comprises a caliper structure, wherein the caliper structure comprises two symmetrical bases, two symmetrical swing arms, two symmetrical wear-resistant sleeves and two symmetrical caliper pistons which are oppositely formed, and a space is formed between the two caliper pistons for arranging a disc brake disc; one side of each base is respectively pivoted with a rotating fulcrum shaft of the swing arm, the base is internally provided with the wear-resistant sleeve, a caliper piston is movably arranged in each wear-resistant sleeve, and a fixing bolt is arranged at the position of the swing arm opposite to the caliper piston so that the swing arm can pull and drive the caliper piston to reciprocate in the wear-resistant sleeve; the other end of the swing arm is provided with a rotary swing shaft; a driving unit, which includes a multi-link structure, the multi-link structure is disposed at the opposite position of the swing shafts of the two symmetrical swing arms, the two swing shafts are respectively pivoted with a synchronous connecting pin axially, both ends of each synchronous connecting pin are respectively pivoted with a side pivot part of a connecting rod component radially, so that the two swing arms are further pivoted with four connecting rod components by the swing shafts, the other ends of each connecting rod component are mutually pivoted by a central shaft, a central pivot hole is respectively radially disposed in the middle of the shaft sections of the two central pivots, the two central pivot holes are respectively fixed on a first shaft assembly section and a second shaft assembly section of a first wire connecting piece and a second wire connecting piece axially, the tail ends of the first shaft assembly section and the second shaft assembly section are respectively fixed with an elastic component, and a first wire hole and a second wire hole are respectively penetrated through the first wire hole and the second wire hole, for a brake cable to pass through; the four-bar linkage element of the multi-bar linkage structure is driven by the driving brake cable to drive the two swing arms of the brake unit to drive the caliper piston to perform the tight braking relative to the disc brake disc.
Furthermore, a linking ball head is axially arranged in the caliper piston, an inner screw groove is formed in one side of the linking ball head, the inner screw groove is used for assembling an external screw thread guide screw of a fixed bolt, a driving locking groove is formed in one end of the fixed bolt, a locking hole is formed in the swing arm corresponding to the driving locking groove in an open mode, a movable ball head is arranged at the other end of the fixed bolt, and a ball groove for being pivoted in the swing arm corresponding to the movable ball head is formed in the swing arm.
Furthermore, a nut element for limiting the movable ball head is further arranged at the relative position of the swing arm and the movable ball head, a socket is arranged on the nut element corresponding to the movable ball head, an external thread section is arranged on the outer edge of the nut element, and an internal thread section is arranged on the swing arm corresponding to the external thread section, so that the nut element can be assembled into the internal thread section of the swing arm by a guide screw lock.
Furthermore, the surface of the brake unit can be coated with a layer of protective sleeve, and the protective sleeve is provided with a hook end for providing group setting and positioning corresponding to the brake unit so as to be combined and positioned.
After the technical means is adopted, the four-bar linkage element of the multi-bar linkage structure is driven by driving the brake cable to pull, and the two swing arms of the brake unit are driven by utilizing the multi-bar linkage lever principle to drive the caliper piston to tightly brake relative to the disc brake disc, so that the maximum force can be exerted at the lower initial point of controlling the brake, and the labor-saving effect is further achieved.
Drawings
Fig. 1 is a perspective view of the mechanical multi-link disc brake of the present invention.
FIG. 2 is a schematic diagram of the driving unit in an unactuated state according to the present invention.
FIG. 3 is a schematic diagram of the brake unit in the non-actuated state according to the present invention.
FIG. 4 is a schematic diagram of the driving unit in an activated state according to the present invention.
FIG. 5 is a schematic view of the brake unit in an actuated state according to the present invention.
FIG. 6 is a view of the embodiment of the present invention assembled to a bicycle rear fork.
[ notation ] to show
A drive unit and B brake unit
C fixed lockhole D dish of stopping
E rear fork arm F connecting part
G connecting piece L brake cable
L1 fixed assembly 10 multi-link structure
11 link element 12 pivot
121 center hole 13 side pivot part
131 co-acting connecting pin 14 elastic element
15 first wire connecting member 151 first wire hole
152 first shaft assembly segment 16 second wire connecting member
161 second wire hole 162 second shaft assembly segment
20 calliper structure 21 swing arm
211 inner screw section of ball groove 212
213 lockhole 22 rotary swing axle
23-turn support shaft 24 base
25 caliper piston 26 wear sleeve
27 external thread of fixing bolt 271
272 moving ball 273 driving lock slot
28 linkage bulb 281 inner screw groove
29 nut member 291 outer thread section
292 socket.
Detailed Description
Referring to fig. 1 to 6, a preferred embodiment of a mechanical multi-link disc brake according to the present invention is shown, but the preferred embodiment is for illustration purposes only, and the patent application is not limited by the structure, and includes:
referring to fig. 1 to 6, a preferred embodiment of a mechanical multi-link disc brake according to the present invention is shown, but the preferred embodiment is for illustration purposes only, and the patent application is not limited by the structure, and includes:
a brake unit B, the brake unit B comprises a caliper structure 20, the caliper structure 20 comprises two symmetrical bases 24, two symmetrical swing arms 21, two symmetrical wear-resistant sleeves 26 and two symmetrical caliper pistons 25 which are oppositely formed, and a space is formed between the two caliper pistons 25 for arranging a disc brake disc D; wherein
A rotating support shaft 23 of the swing arm 21 is respectively pivoted to one side of each base 24, the wear-resistant sleeve 26 is arranged in each base 24, a caliper piston 25 is movably arranged in each wear-resistant sleeve 26, and a fixing bolt 27 is arranged at a position corresponding to the caliper piston 25 of the swing arm 21, so that the swing arm 21 can pull the caliper piston 25 to reciprocate in the wear-resistant sleeve 26; the other end of the swing arm 21 is provided with a rotary swing shaft 22;
two fixing lock holes C protruding from the two sides of the base 24 for locking the position of a connecting part F arranged on a rear fork E fixed on a bicycle, so that the fixing lock holes C are aligned with the connecting part F of the rear fork E and then fixed by a connecting piece G lock set;
a driving unit A, the driving unit A includes a multi-link structure 10, the multi-link structure 10 is disposed at the opposite position of the swinging shafts 22 of the two symmetrical swinging arms 21, the two swinging shafts 22 are respectively pivoted with a same-moving connecting pin 131 in the axial direction, two ends of each of the two same-moving connecting pins 131 are respectively pivoted with a side pivot part 13 of a connecting rod member 11 in the radial direction, so that the two swinging arms 21 are further pivoted with four connecting rod members 11 by the swinging shafts 22, the other ends of the two connecting rod members 11 are pivoted with each other by a central pivot 12, a central pivot hole 121 is respectively disposed in the middle of the shaft section of the central pivot 12 in the radial direction, the two central pivot holes 121 are respectively fixed in the first shaft assembly section 152 and the second shaft assembly section 162 of a first wire connecting member 15 and a second wire connecting member 16 in the axial direction, the tail ends of the first shaft assembly section 152 and the second shaft assembly section 162 are respectively fixed with an elastic member 14, and a first wire hole 151 and a second wire connecting member 16 are respectively penetrated through the first wire connecting member 15 and the second wire connecting member 16 The second wire hole 161 is used for a brake cable L to pass through and fixed by a fixing component L1, and the elastic component 14 can make the brake cable L drive the four link components 11 to stretch and elastically reset; when the brake cable L is driven to pull and drive the four-bar element 11 of the multi-bar structure 10, the two swing arms 21 of the brake unit B are driven by the multi-bar lever principle to drive the caliper piston 25 to perform a tight braking relative to the disc brake D, so that the maximum force can be exerted at the lower starting point of the brake control, and the labor-saving effect is achieved.
Then, the inside of the caliper piston 25 is axially provided with a linking ball 28, one side of the linking ball 28 is provided with an inner screw groove 281, the inner screw groove 281 is used for a screw guiding assembly of an outer screw thread 271 of a fixing bolt 27, wherein one end of the fixing bolt 27 is provided with a driving locking groove 273, the swing arm 21 is provided with a locking hole 213 corresponding to the driving locking groove 273, the other end of the fixing bolt 27 is provided with a movable ball 272, and the swing arm 21 is provided with a ball groove 211 corresponding to the movable ball 272 and provided with a pivot therein.
Furthermore, a nut element 29 for limiting the position of the movable ball 272 is further disposed at the relative position of the swing arm 21 and the movable ball 272, a socket 292 is disposed on the nut element 29 corresponding to the movable ball 272, an outer screw section 291 is disposed on the outer edge of the nut element 29, and an inner screw section 212 is disposed on the swing arm 21 corresponding to the outer screw section 291, so that the nut element 29 can be assembled into the inner screw section 212 of the swing arm 21 by a screw lock.
Preferably, the surface of the brake unit B may be covered with a protective cover 30, and the protective cover 30 is provided with a hook end 31 for positioning and assembling corresponding to the brake unit B.
The invention drives the brake cable L to pull and drive the four-bar element 11 of the multi-bar structure 10 of the brake unit B, and drives the two swing arms 21 of the brake unit B to drive the caliper piston 25 to tightly brake relative to the disc brake disc D by utilizing the multi-bar lever principle, so that the maximum force can be exerted at the lower initial point of controlling the brake, and the labor-saving effect is further achieved.
In summary, the present invention is an inventive creation with excellent originality, because the above structure of the present invention can effectively overcome the disadvantages of the conventional invention, and further has the advantages and practical value mentioned above.
Claims (4)
1. The utility model provides a many connecting rods of mechanical type dish is stopped which characterized in that contains:
the brake unit comprises a caliper structure, wherein the caliper structure comprises two symmetrical bases, two symmetrical swing arms, two symmetrical wear-resistant sleeves and two symmetrical caliper pistons which are oppositely formed, and a space is formed between the two caliper pistons for arranging a disc brake disc;
one side of each base is respectively pivoted with a rotating fulcrum shaft of the swing arm, the base is internally provided with the wear-resistant sleeve, a caliper piston is movably arranged in each wear-resistant sleeve, and a fixing bolt is arranged at the position of the swing arm opposite to the caliper piston so that the swing arm can pull and drive the caliper piston to reciprocate in the wear-resistant sleeve; the other end of the swing arm is provided with a rotary swing shaft;
a driving unit, which includes a multi-link structure, the multi-link structure is disposed at the opposite position of the swing shafts of the two symmetrical swing arms, the two swing shafts are respectively pivoted with a synchronous connecting pin axially, both ends of each synchronous connecting pin are respectively pivoted with a side pivot part of a connecting rod component radially, so that the two swing arms are further pivoted with four connecting rod components by the swing shafts, the other ends of each connecting rod component are mutually pivoted by a central shaft, a central pivot hole is respectively radially disposed in the middle of the shaft sections of the two central pivots, the two central pivot holes are respectively fixed on a first shaft assembly section and a second shaft assembly section of a first wire connecting piece and a second wire connecting piece axially, the tail ends of the first shaft assembly section and the second shaft assembly section are respectively fixed with an elastic component, and a first wire hole and a second wire hole are respectively penetrated through the first wire hole and the second wire hole, for a brake cable to pass through; the four-bar linkage element of the multi-bar linkage structure is driven by the driving brake cable to drive the two swing arms of the brake unit to drive the caliper piston to perform the tight braking relative to the disc brake disc.
2. The mechanical multi-link disc brake of claim 1, wherein: the inside of the caliper piston is axially provided with a linkage ball head, one side of the linkage ball head is provided with an inner groove, the inner groove is used for assembling an external thread guide screw of a fixed bolt, one end of the fixed bolt is provided with a driving locking groove, the swing arm is provided with a locking hole corresponding to the driving locking groove in an open mode, the other end of the fixed bolt is provided with a movable ball head, and the swing arm is provided with a ball groove which is pivoted in the swing arm corresponding to the movable ball head.
3. The mechanical multi-link disc brake of claim 2, wherein: the swing arm is provided with a nut element for limiting the movable ball head at a position corresponding to the movable ball head, the nut element is provided with a socket corresponding to the movable ball head, an outer thread section is arranged on the outer edge of the nut element, and an inner thread section is arranged on the swing arm corresponding to the outer thread section, so that the nut element can be assembled into the inner thread section of the swing arm by a guide screw lock.
4. The mechanical multi-link disc brake of claim 1, wherein: the surface of the brake unit can be coated with a layer of protective sleeve, and the protective sleeve is provided with a hook end for providing group setting and positioning corresponding to the brake unit so as to be combined and positioned.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010146083.0A CN113357291A (en) | 2020-03-05 | 2020-03-05 | Mechanical multi-connecting-rod disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010146083.0A CN113357291A (en) | 2020-03-05 | 2020-03-05 | Mechanical multi-connecting-rod disc brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113357291A true CN113357291A (en) | 2021-09-07 |
Family
ID=77523551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010146083.0A Pending CN113357291A (en) | 2020-03-05 | 2020-03-05 | Mechanical multi-connecting-rod disc brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113357291A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117446656A (en) * | 2023-12-18 | 2024-01-26 | 河南省大方重型机器有限公司 | Energy-saving and noise-reducing green environment-friendly single-beam crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142278B1 (en) * | 1967-01-27 | 1976-11-15 | ||
| CN2325299Y (en) * | 1998-03-12 | 1999-06-23 | 袁庆余 | Two wheel type cycle brake |
| JP2001132783A (en) * | 1999-11-05 | 2001-05-18 | Akebono Brake Ind Co Ltd | Disc brake |
| US6666304B1 (en) * | 2002-12-19 | 2003-12-23 | Tan-Cheng Huang | Lining adjustable device for disk brake system |
| CN1598348A (en) * | 2004-09-02 | 2005-03-23 | 许艳 | Mechanical disk brake |
| JP2009133462A (en) * | 2007-12-03 | 2009-06-18 | Akebono Brake Ind Co Ltd | Disk brake mechanism for vehicle |
| CN101907140A (en) * | 2009-06-03 | 2010-12-08 | 河南理工大学 | Pincer type brake with force-amplifying mechanisms |
| JP2011102063A (en) * | 2009-11-10 | 2011-05-26 | Bridgestone Cycle Co | Brake for bicycle |
| CN102821985A (en) * | 2010-03-31 | 2012-12-12 | 株式会社爱考斯研究 | Camber angle adjustment device |
| TWM447938U (en) * | 2012-09-21 | 2013-03-01 | wen-yong Zhang | Brakes system for vehicles |
| JP2013231458A (en) * | 2012-04-27 | 2013-11-14 | Akebono Brake Ind Co Ltd | Automatic gap adjustment mechanism for wedge/cam brake |
| EP3112244A1 (en) * | 2015-06-30 | 2017-01-04 | Campagnolo S.R.L. | Bicycle brake and method for constructing the profile of a surface portion of a lever of said brake |
| CN107010160A (en) * | 2016-01-06 | 2017-08-04 | 株式会社岛野 | Bicycle disk brake caliper |
| TW201942007A (en) * | 2018-03-27 | 2019-11-01 | 林昌慧 | Bilateral synchronous mechanical disc brake structure linking the brake pads, on the left and right sides respectively, to clamp or loosen the predetermined disc disposed at the center |
| CN210087867U (en) * | 2019-05-31 | 2020-02-18 | 涡阳凯达机械制造有限公司 | Novel drum-type emergency brake |
-
2020
- 2020-03-05 CN CN202010146083.0A patent/CN113357291A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5142278B1 (en) * | 1967-01-27 | 1976-11-15 | ||
| CN2325299Y (en) * | 1998-03-12 | 1999-06-23 | 袁庆余 | Two wheel type cycle brake |
| JP2001132783A (en) * | 1999-11-05 | 2001-05-18 | Akebono Brake Ind Co Ltd | Disc brake |
| US6666304B1 (en) * | 2002-12-19 | 2003-12-23 | Tan-Cheng Huang | Lining adjustable device for disk brake system |
| CN1598348A (en) * | 2004-09-02 | 2005-03-23 | 许艳 | Mechanical disk brake |
| JP2009133462A (en) * | 2007-12-03 | 2009-06-18 | Akebono Brake Ind Co Ltd | Disk brake mechanism for vehicle |
| CN101907140A (en) * | 2009-06-03 | 2010-12-08 | 河南理工大学 | Pincer type brake with force-amplifying mechanisms |
| JP2011102063A (en) * | 2009-11-10 | 2011-05-26 | Bridgestone Cycle Co | Brake for bicycle |
| CN102821985A (en) * | 2010-03-31 | 2012-12-12 | 株式会社爱考斯研究 | Camber angle adjustment device |
| JP2013231458A (en) * | 2012-04-27 | 2013-11-14 | Akebono Brake Ind Co Ltd | Automatic gap adjustment mechanism for wedge/cam brake |
| TWM447938U (en) * | 2012-09-21 | 2013-03-01 | wen-yong Zhang | Brakes system for vehicles |
| EP3112244A1 (en) * | 2015-06-30 | 2017-01-04 | Campagnolo S.R.L. | Bicycle brake and method for constructing the profile of a surface portion of a lever of said brake |
| CN107010160A (en) * | 2016-01-06 | 2017-08-04 | 株式会社岛野 | Bicycle disk brake caliper |
| TW201942007A (en) * | 2018-03-27 | 2019-11-01 | 林昌慧 | Bilateral synchronous mechanical disc brake structure linking the brake pads, on the left and right sides respectively, to clamp or loosen the predetermined disc disposed at the center |
| CN210087867U (en) * | 2019-05-31 | 2020-02-18 | 涡阳凯达机械制造有限公司 | Novel drum-type emergency brake |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117446656A (en) * | 2023-12-18 | 2024-01-26 | 河南省大方重型机器有限公司 | Energy-saving and noise-reducing green environment-friendly single-beam crane |
| CN117446656B (en) * | 2023-12-18 | 2024-03-22 | 河南省大方重型机器有限公司 | Energy-saving and noise-reducing green environment-friendly single-beam crane |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210907 |