CN103910300A - Winding mechanism - Google Patents
Winding mechanism Download PDFInfo
- Publication number
- CN103910300A CN103910300A CN201410080519.5A CN201410080519A CN103910300A CN 103910300 A CN103910300 A CN 103910300A CN 201410080519 A CN201410080519 A CN 201410080519A CN 103910300 A CN103910300 A CN 103910300A
- Authority
- CN
- China
- Prior art keywords
- spline housing
- hoisting mechanism
- brake
- male splines
- inner spline
- 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.)
- Granted
Links
Landscapes
- Braking Arrangements (AREA)
Abstract
The invention discloses a winding mechanism and belongs to the technical field of crane machinery. The winding mechanism comprises a hydraulic motor, a reducer, a winding drum and a brake, wherein the brake comprises a backstop, an inner friction sheet, an outer friction sheet, a brake casing, a spring and a brake oil cylinder, the outer friction sheet is connected to the inner wall of the brake casing, the backstop comprises an inner spline housing and an outer spline housing, two ends of the inner spline housing are connected with an output shaft of the hydraulic motor and an input shaft of the reducer respectively, the outer spline housing sleeves the inner spline sleeve, a backstop structure for enabling the inner spline housing to freely rotation in a single direction is arranged between the inner spline housing and the outer spline housing, the inner friction sheet is connected to the outer wall of the outer spline housing, and the brake oil cylinder is installed on the inner wall of the brake casing in a sliding mode and clamped between the first spring and the outer friction sheet. According to the winding mechanism, the backstop is added, so that when a crane performs lifting, the brake needn't to be opened, and the problem of failure caused by dynamic friction of the brake when an empty hook of the crane is lifted is avoided.
Description
Technical field
The present invention relates to hoisting crane field of mechanical technique, particularly a kind of hoisting mechanism.
Background technology
At present, crane hoisting goods is mainly realized by hoisting mechanism.HM Hydraulic Motor, retarder and reel have formed hoisting mechanism jointly.Particularly, the power of HM Hydraulic Motor acts on reel by retarder, then being involved in and rolling out the rise and fall that realize lifting cargo by reel.
Existing hoisting mechanism mainly comprises two types: single imported and how imported.List is imported only has the single HM Hydraulic Motor for driving, and conventionally adopts built-in retarder or parallel shaft (speed) reducer; Many imported two HM Hydraulic Motor for driving that have at least.In actual applications, drg also can be installed between retarder and motor.
For the hoisting mechanism of fluid motor-driven, its drg is generally the many friction disk types of hydraulic switch, i.e. the unlatching of drg is controlled by the pressure of hydraulic efficiency pressure system major loop with closed.In the time that manipulation lift control handle hoists goods, the pressure of major loop (being HM Hydraulic Motor control loop) raises gradually, and after this pressure reaches setting value, drg will be opened completely.If major loop pressure not yet reaches setting value, but between zero pressure value and setting value, the friction lining of drg will be in the relative motion state of half friction half running, and such dynamic brake state can make the braking effect of drg weaken rapidly, until lost efficacy.Under normal circumstances, this state only just there will be when suspension hook does not hang any load (being empty hook), the time that this empty hook lifting state accounts in the whole working cycle of hoisting crane is considerably less, general empty hook lifting that also can be not for a long time, therefore in conventional hoisting crane, this design does not have problems.
But in the hoisting crane of deep ocean work, particularly, in the application of active compensation hoisting crane, the operating water depth of hoisting crane is up to thousands of rice, hoisting crane may hoist from seabed, and thousands of rice hoists under the hook-shaped state of sky.In this case, the friction lining of drg will reach a few hours in dynamic brake state, and this can cause the friction lining of drg to lose efficacy rapidly, makes the operation of hoisting crane in breakneck state.
Summary of the invention
Cause brake wear and lost efficacy and inputted the problem that hoisting mechanism retarder load imbalance causes retarder overload to be damaged more in order to solve the empty hook lifting dynamic brake of prior art mesopelagic operation active compensation hoisting crane, the embodiment of the present invention provides a kind of hoisting mechanism.Described technical scheme is as follows:
The embodiment of the present invention provides a kind of hoisting mechanism, described hoisting mechanism comprise HM Hydraulic Motor, retarder, reel and be arranged on described HM Hydraulic Motor and described retarder between drg, described drg comprises holdback, inner attrition piece, outside friction disc, brake casing, the first spring and brake cylinder;
Described brake casing is connected with described HM Hydraulic Motor, and described outside friction disc is connected on the inwall of described brake casing;
Described holdback comprises inner spline housing and male splines cover, the two ends of described inner spline housing are connected with the output shaft of described HM Hydraulic Motor and the input shaft of described retarder respectively, described male splines cover is set on described inner spline housing and described inner spline housing and the coaxial setting of described male splines cover, between described inner spline housing and described male splines cover, be provided with the backstop structure for described inner spline housing can one direction with respect to described male splines cover be rotated freely, described inner attrition piece is connected on the outer wall of described male splines cover;
Described brake cylinder is slidably mounted on the inwall of described brake casing, and described brake cylinder is located between described the first spring and described outside friction disc;
In the time that described brake cylinder passes into pressure oil, described inner attrition piece and described outside friction disc are separated from each other; In the time that described brake cylinder does not pass into pressure oil, described inner attrition piece and described outside friction disc cooperatively interact, and make the relatively described brake casing of described male splines cover static.
Further, described backstop structure comprises multiple the second springs and multiple roller, described the second spring and described roller are located between described male splines cover and described inner spline housing, on the outer wall of described inner spline housing, be evenly distributed with multipair projection and groove, described multipair projection and groove are alternately arranged, in each described groove, be provided with a described roller, described the second spring is connected between described projection and described roller.
Alternatively, described holdback also comprises the first antifriction-bearing box being located between described inner spline housing and described male splines cover.
Alternatively, described drg also comprises the second antifriction-bearing box being arranged between described male splines cover and described brake casing.
Further, described brake cylinder comprises cylinder body, piston and oil inlet, and described piston is positioned at described cylinder body, and described oil inlet arranges on described cylinder body.
Preferably, described brake cylinder also comprises the sealing member of being located at described oil inlet place.
Further, described inner attrition piece is connected on the outer wall of described male splines cover by spline tooth.
Further, described outside friction disc is connected on the inwall of described brake casing by spline tooth.
Alternatively, the how imported hoisting mechanism that described hoisting mechanism is multiple fluid motor-driven or the imported hoisting mechanism of list of single fluid motor-driven.
Described how imported hoisting mechanism is that load capacity is the hoisting mechanism of 10 tons～5000 tons.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By set up the holdback that comprises inside and outside spline housing and backstop structure in the drg of hoisting mechanism, when hoisting crane is when the state of hoisting (being that reel is involved in), because holdback can be realized unidirectional return-stopping function, so drg need not be opened, while having avoided thousands of meters of the empty hook liftings of active compensation hoisting crane of deep ocean work, drg always the state in dynamic friction and cause lost efficacy problem, met the designing requirement of deep ocean work active compensation hoisting crane.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of hoisting mechanism of providing of the embodiment of the present invention;
Fig. 2 is the inner structure schematic diagram of the drg of the hoisting mechanism that provides of the embodiment of the present invention;
Fig. 3 is the side-looking structural representation of the drg that provides of the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment
The embodiment of the present invention provides a kind of hoisting mechanism, be particularly useful for the active compensation hoisting crane of deep ocean work, referring to Fig. 1, Fig. 2 and Fig. 3, this hoisting mechanism comprises: HM Hydraulic Motor 31, retarder 32, reel (not shown) and be arranged on HM Hydraulic Motor 31 and retarder 32 between drg 33.Drg 33(is shown in Fig. 2) comprise holdback 11, inner attrition piece 12, outside friction disc 13, brake casing 14, the first spring 15 and brake cylinder 16, brake casing 14 is connected with HM Hydraulic Motor 31, and outside friction disc 13 is connected on the inwall of brake casing 14.Holdback 11(is shown in Fig. 2 and Tu) comprise that inner spline housing 111 and male splines overlap 112, the two ends of inner spline housing 111 are connected with the output shaft 311 of HM Hydraulic Motor 31 and the input shaft 321 of retarder 32 respectively, male splines cover 112 is set on inner spline housing 111 and inner spline housing 111 coaxially arranges with male splines cover 112, between inner spline housing 111 and male splines cover 112, be provided with the backstop structure 10 for inner spline housing 111 can one direction with respect to male splines cover 112 be rotated freely, inner attrition piece 12 is connected on the outer wall of male splines cover 112.The first spring 15 is connected on the inwall of brake casing 14, and brake cylinder 16 is slidably connected on the inwall of brake casing 14, and brake cylinder 16 is located between the first spring 15 and outside friction disc 13.
In the time that brake cylinder 16 passes into pressure oil, inner attrition piece 12 and outside friction disc 13 are separated from each other; In the time that brake cylinder 16 does not pass into pressure oil, inner attrition piece 12 and outside friction disc 13 cooperatively interact, and make male splines cover 112 relative brake casings 14 static.
Particularly, inner spline housing 111 and the output shaft 311 of HM Hydraulic Motor 31 and the input shaft of retarder 32 321 be by spline joint, inner spline housing 111, output shaft 311 and input shaft 321 under the driving of HM Hydraulic Motor 31 can together with rotate.
Further, inner attrition piece 12 can be connected on the outer wall of male splines cover 112 by spline tooth.Outside friction disc 13 also can be fixed on the madial wall of brake casing 14 by spline tooth.
Referring to Fig. 2, brake cylinder 16 comprises cylinder body 161, piston 162 and oil inlet 163, and piston 162 is positioned at cylinder body 161, and oil inlet 163 arranges on cylinder body 161.While realization, piston 162 is fixedly connected on brake casing 14.Cylinder body 161 directly contacts with the first spring 15, cylinder body 16 can slide to the direction of outside friction disc 13 under the effect of the first spring 15 elastic force, and pass into after pressure oil at brake cylinder 16, cylinder body 161 also can the direction to the first spring 15 slide under the effect of pressure, compress the first spring 15, to push the first spring 15 open, interior outside friction disc is separated from each other.
Further, brake cylinder 16 also comprises for example O RunddichtringO of sealing member 19(of being located at oil inlet 163 places), to prevent pressure oil leakage.While realization, the place that piston 162 is connected with cylinder body 161 is also provided with sealing member.
Easily know, corresponding with the oil inlet 163 of the drg oil cylinder 16 brake cylinder oil inlet 17 that offers on brake casing 14, for providing pressure oil to brake cylinder 16.When passing into after pressure oil by brake cylinder oil inlet 17, brake cylinder 14 is worked, and pushes open after the first spring 15, between inner attrition piece 12 and outside friction disc 13, loses positive pressure, and braking force is eliminated.
Referring to Fig. 3, backstop structure 10 comprises multiple the second springs 115 and multiple roller 114, the second spring 115 and roller 114 are located between male splines cover 112 and inner spline housing 111, on the outer wall of inner spline housing 112, be evenly distributed with multipair protruding 112a and groove 112b, multipair protruding 112a and groove 112b alternately arrange, in each groove 112b, being provided with a roller 114, the second springs 115 is connected between protruding 112a and roller 114.Particularly, the peripheral surface of groove 112b is one section of cambered surface and one section of inclined-plane, and the second spring 115 is all positioned in cambered surface, and cambered surface and junction, inclined-plane be the nadir of groove 112b, the nadir of roller 114 in groove 112b under state of nature.In the time that brake cylinder does not pass into pressure oil, inner spline housing is along with input shaft rotates together with output shaft, in the process being stretched gradually at the second spring, roller keeps transfixion, along inner spline housing week inclined-plane upwards will block roller, inner spline housing is pinned no longer and rotate, and then stop the rotation of the output shaft of HM Hydraulic Motor and the input shaft of retarder, thereby realize one direction check.
In the present embodiment, referring to Fig. 2, holdback 11 can also comprise the first antifriction-bearing box 113 being located between inner spline housing 111 and male splines cover 112, for keeping relatively rotating of inner spline housing 111 male splines covers 112.The first antifriction-bearing box 113 is set on inner spline housing 111.
In the present embodiment, referring to Fig. 2, drg 33 can also comprise the second antifriction-bearing box 18 being arranged between male splines cover 113 and brake casing 114, for making male splines cover 112 and arrester shell 14 bodies keep relatively rotating.The second antifriction-bearing box 18 is positioned at the opposite side of the outside friction disc relative with brake cylinder 16 13, and particularly, the inner ring of the second antifriction-bearing box 18 is set in male splines and puts, and the outer ring of the second antifriction-bearing box 18 directly contacts with brake casing 114.
Briefly introduce hoisting mechanism working process below:
In the time that HM Hydraulic Motor band movable reel is involved in (being that hoisting crane is in the state of hoisting), in brake cylinder, do not pass into pressure oil, inner attrition piece and the mutual friction of outside friction disc phase, make male splines overlap relative brake casing static; The output shaft rotation of motor, due to the unidirectional action of holdback, make inside and outside spline housing rotate (i.e. inside and outside spline housing rotation, brake casing static) with respect to brake casing, thereby drive the input shaft of retarder to rotate by inside and outside spline housing, that is to say, under braking mode, the input shaft of retarder can freely rotate with the output shaft of motor.
In the time that HM Hydraulic Motor band movable reel rolls out (being that hoisting crane is in decline state), pressure oil passes into brake cylinder, and the first spring is pushed in brake cylinder work open, interior outside friction disc loses positive pressure, no longer phase mutual friction, braking force disappears, and the input shaft of retarder can freely rotate with the output shaft of motor.
In actual applications, the hoisting mechanism of this enforcement can be the how imported hoisting mechanism of the imported hoisting mechanism of the list of single fluid motor-driven or multiple fluid motor-driven, be particularly useful for the hoisting mechanism that load capacity is very large, such as, load capacity is the hoisting mechanism of 10 tons～5000 tons.In practical application; the hoisting mechanism that load capacity is larger can adopt multiple retarders conventionally; each retarder is provided with the drg in this enforcement; in the time of crane hoisting; drg need not be opened; the output shaft of HM Hydraulic Motor and the input shaft of retarder can freely rotate; can effectively avoid occurring the abnormal clamping stagnation that occurs when the drg on one of them retarder; can not normally open time; be carried on this retarder because discontinuity equalization between each retarder makes all loads, and cause this retarder overload and the problem that is damaged.
The embodiment of the present invention by setting up the holdback that comprises inside and outside spline housing and backstop structure in the drg of hoisting mechanism, when hoisting crane is in the time hoisting state, because holdback can be realized unidirectional return-stopping function, so drg need not be opened, while having avoided thousands of meters of the empty hook liftings of active compensation hoisting crane of deep ocean work, drg always the state in dynamic friction and cause lost efficacy problem, met the designing requirement of deep ocean work active compensation hoisting crane.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a hoisting mechanism, described hoisting mechanism comprise HM Hydraulic Motor, retarder, reel and be arranged on described HM Hydraulic Motor and described retarder between drg, it is characterized in that, described drg comprises holdback, inner attrition piece, outside friction disc, brake casing, the first spring and brake cylinder;
Described brake casing is connected with described HM Hydraulic Motor, and described outside friction disc is connected on the inwall of described brake casing;
Described holdback comprises inner spline housing and male splines cover, the two ends of described inner spline housing are connected with the output shaft of described HM Hydraulic Motor and the input shaft of described retarder respectively, described male splines cover is set on described inner spline housing and described inner spline housing and the coaxial setting of described male splines cover, between described inner spline housing and described male splines cover, be provided with the backstop structure for described inner spline housing can one direction with respect to described male splines cover be rotated freely, described inner attrition piece is connected on the outer wall of described male splines cover;
Described brake cylinder is slidably mounted on the inwall of described brake casing, and described brake cylinder is located between described the first spring and described outside friction disc;
In the time that described brake cylinder passes into pressure oil, described inner attrition piece and described outside friction disc are separated from each other; In the time that described brake cylinder does not pass into pressure oil, described inner attrition piece and described outside friction disc cooperatively interact, and make the relatively described brake casing of described male splines cover static.
2. hoisting mechanism according to claim 1, it is characterized in that, described backstop structure comprises multiple the second springs and multiple roller, described the second spring and described roller are located between described male splines cover and described inner spline housing, on the outer wall of described inner spline housing, be evenly distributed with multipair projection and groove, described multipair projection and groove be layout alternately, is provided with a described roller in each described groove, and described the second spring is connected between described projection and described roller.
3. hoisting mechanism according to claim 1, is characterized in that, described holdback also comprises the first antifriction-bearing box being located between described inner spline housing and described male splines cover.
4. hoisting mechanism according to claim 1, is characterized in that, described drg also comprises the second antifriction-bearing box being arranged between described male splines cover and described brake casing.
5. hoisting mechanism according to claim 1, is characterized in that, described brake cylinder comprises cylinder body, piston and oil inlet, and described piston is positioned at described cylinder body, and described oil inlet arranges on described cylinder body.
6. hoisting mechanism according to claim 5, is characterized in that, described brake cylinder also comprises the sealing member of being located at described oil inlet place.
7. according to the drg described in claim 1-6 any one, it is characterized in that, described inner attrition piece is connected on the outer wall of described male splines cover by spline tooth.
8. according to the hoisting mechanism described in claim 1-6 any one, it is characterized in that, described outside friction disc is connected on the inwall of described brake casing by spline tooth.
9. according to the hoisting mechanism described in claim 1-6 any one, it is characterized in that the how imported hoisting mechanism that described hoisting mechanism is multiple fluid motor-driven or the imported hoisting mechanism of the list of single fluid motor-driven.
10. hoisting mechanism according to claim 9, is characterized in that, described how imported hoisting mechanism is that load capacity is the hoisting mechanism of 10 tons～5000 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080519.5A CN103910300B (en) | 2014-03-06 | 2014-03-06 | A kind of hoisting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410080519.5A CN103910300B (en) | 2014-03-06 | 2014-03-06 | A kind of hoisting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103910300A true CN103910300A (en) | 2014-07-09 |
| CN103910300B CN103910300B (en) | 2017-01-04 |
Family
ID=51036357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410080519.5A Active CN103910300B (en) | 2014-03-06 | 2014-03-06 | A kind of hoisting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103910300B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188056Y (en) * | 1993-07-29 | 1995-01-25 | 山东矿业学院 | Brake |
| CN2305317Y (en) * | 1997-06-28 | 1999-01-27 | 姚盛才 | Double speed running planet reduction machine capable of braking |
| CN2319387Y (en) * | 1997-12-16 | 1999-05-19 | 刘炳南 | Light geared trailing machine |
| CN101016140A (en) * | 2007-02-08 | 2007-08-15 | 常熟市常福电力机具有限公司 | Braking mechanism for grinding machine |
| CN101482154A (en) * | 2009-02-11 | 2009-07-15 | 中国矿业大学 | Hydraulic brake |
| CN101659266A (en) * | 2009-09-19 | 2010-03-03 | 煤炭科学研究总院太原研究院 | Wheel-side reducer with brake for bracket carrier |
| CN201599350U (en) * | 2009-12-01 | 2010-10-06 | 焦作制动器股份有限公司 | Hydraulic multiple-disc brake |
| CN202012587U (en) * | 2011-04-19 | 2011-10-19 | 周保民 | Overrun clutch |
| CN202158150U (en) * | 2011-07-20 | 2012-03-07 | 徐州科源液压有限公司 | Inversely-arranged rotary speed reducer |
| CN102494055A (en) * | 2011-12-06 | 2012-06-13 | 天津工程机械研究院 | Multi-disk wet-type brake for loading machine |
| CN202953779U (en) * | 2012-10-25 | 2013-05-29 | 安徽省巢湖市中信建材机械有限公司 | Improved brake structure of hoister |
| CN202967432U (en) * | 2012-11-15 | 2013-06-05 | 四川自贡起重输送机械制造有限公司 | Non-return device |
| CN104685253A (en) * | 2012-10-08 | 2015-06-03 | 施蒂伯有限公司 | Backstopping clutch with torque transmission through radial surface of outer race |
-
2014
- 2014-03-06 CN CN201410080519.5A patent/CN103910300B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188056Y (en) * | 1993-07-29 | 1995-01-25 | 山东矿业学院 | Brake |
| CN2305317Y (en) * | 1997-06-28 | 1999-01-27 | 姚盛才 | Double speed running planet reduction machine capable of braking |
| CN2319387Y (en) * | 1997-12-16 | 1999-05-19 | 刘炳南 | Light geared trailing machine |
| CN101016140A (en) * | 2007-02-08 | 2007-08-15 | 常熟市常福电力机具有限公司 | Braking mechanism for grinding machine |
| CN101482154A (en) * | 2009-02-11 | 2009-07-15 | 中国矿业大学 | Hydraulic brake |
| CN101659266A (en) * | 2009-09-19 | 2010-03-03 | 煤炭科学研究总院太原研究院 | Wheel-side reducer with brake for bracket carrier |
| CN201599350U (en) * | 2009-12-01 | 2010-10-06 | 焦作制动器股份有限公司 | Hydraulic multiple-disc brake |
| CN202012587U (en) * | 2011-04-19 | 2011-10-19 | 周保民 | Overrun clutch |
| CN202158150U (en) * | 2011-07-20 | 2012-03-07 | 徐州科源液压有限公司 | Inversely-arranged rotary speed reducer |
| CN102494055A (en) * | 2011-12-06 | 2012-06-13 | 天津工程机械研究院 | Multi-disk wet-type brake for loading machine |
| CN104685253A (en) * | 2012-10-08 | 2015-06-03 | 施蒂伯有限公司 | Backstopping clutch with torque transmission through radial surface of outer race |
| CN202953779U (en) * | 2012-10-25 | 2013-05-29 | 安徽省巢湖市中信建材机械有限公司 | Improved brake structure of hoister |
| CN202967432U (en) * | 2012-11-15 | 2013-06-05 | 四川自贡起重输送机械制造有限公司 | Non-return device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103910300B (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101823433B (en) | Wet braking drive axle and loading machine with same | |
| CN102328886B (en) | Winch reducer | |
| WO2021217837A1 (en) | Structure for reducing friction of disengaged friction plate in brake or clutch during operations | |
| CN106865436B (en) | Rope threading hoisting mechanism for crane | |
| CN105110221A (en) | Differential planetary reducer for crane | |
| CN104019158A (en) | Normally closed type brake for hydraulic wet-type drive axle | |
| CN202164067U (en) | Hoisting speed reducer | |
| CN104832573B (en) | Work brake apparatus and its lifting appliance of application | |
| CN205151608U (en) | Free fall hoist engine | |
| CN202369313U (en) | Freefall-type winch | |
| CN103910300A (en) | Winding mechanism | |
| CN108178078A (en) | A kind of lifting mechanism and lifting equipment | |
| US2472559A (en) | Planetary gearing | |
| CN106044607A (en) | Bothway reverse stop device and bothway reverse stop hand device | |
| CN204454382U (en) | Loop chain hydraulic hoist | |
| CN105668440B (en) | One kind can add damp type hoist engine and its application method | |
| CN104675889A (en) | Braking structure of engineering machinery drive axle | |
| CN203453428U (en) | Speed reducer and engineering machine | |
| CN110835063A (en) | Novel electric hoist device | |
| CN104261293A (en) | Winding drum single-acting rope changing system of four-winding drum grab ship unloader and rope changing method | |
| CN213231308U (en) | Hydraulic winch | |
| CN204057826U (en) | Four winding drum grab bucket ship unloader reel single action changes rope system | |
| CN203807024U (en) | Connecting structure of coiling block and speed reducer | |
| CN104609325A (en) | Loop chain hydraulic hoist | |
| CN203173734U (en) | Embedded-type hydraulic winch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |