CN113401828A - Self-reset structure of mechanical braking device of winching mill - Google Patents
Self-reset structure of mechanical braking device of winching mill Download PDFInfo
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- CN113401828A CN113401828A CN202110777189.5A CN202110777189A CN113401828A CN 113401828 A CN113401828 A CN 113401828A CN 202110777189 A CN202110777189 A CN 202110777189A CN 113401828 A CN113401828 A CN 113401828A
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- 210000000078 claw Anatomy 0.000 claims description 11
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- 238000010586 diagram Methods 0.000 description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/12—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect
- B66D5/14—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with axial effect embodying discs
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Abstract
The invention relates to a self-resetting structure of a mechanical braking device of a winching, in particular to an automatic resetting structure of a braking component in the mechanical braking device of the winching, aiming at the problem that the braking is easy to fail in use due to the fact that the braking component belongs to a passive resetting mode, a resetting mechanism is complex, a resetting force transmission chain is long and the like in the traditional winching winch drum braking device, the self-resetting structure of the mechanical braking device of the winching is designed, and the principle of the self-resetting structure is that a resetting spring is utilized to replace a linkage auxiliary braking device which is complex in structure and occupies large space in the resetting mechanism of the traditional winching drum braking device, so that the resetting mode of the braking component is simplified. Compared with the prior art: the resetting mechanism of the brake assembly is greatly simplified, and the resetting reliability of the brake assembly is improved; the brake friction plate is actively locked by a return spring through a power input gear, and the brake assembly does not depend on the rotation of the winch drum for return, so that the brake hysteresis phenomenon is eliminated; meanwhile, the gearbox has smaller volume and lower manufacturing cost.
Description
Technical Field
The invention relates to a winch and a winch which are mechanically driven, in particular to a self-resetting structure of a mechanical braking device of the winch.
Background
The winching machine is widely applied to the fields of field construction, shipping and the like as the operation purposes of hoisting, traction, line tightening and the like, the operation of hoisting, traction, line tightening and the like is generally realized by hoisting a steel wire rope by a winching roller, and after the winching is stopped, a braking device of the winching roller is generally designed for preventing the winching roller from reversing due to the gravity or drifting drag of a hoisted object.
The traditional winch drum brake device for winching consists of an auxiliary brake device linked with a power clutch, a brake assembly with a friction plate, a one-way claw assembly and the like, and the brake assembly and the one-way claw assembly are greatly related to the analysis of the scheme, wherein the brake assembly and the one-way claw assembly are arranged at the tail end of a winching speed changer, a part diagram is shown in figure 1, and an assembly diagram is shown in figure 2. The left power input gear 1 is connected with a winching power input end, and the right power output gear 6 is connected with a winching drum through a meshing reduction gear and then rotates with the winching drum. The inner ring of the power input gear 1 and the power output gear 6 are a pair of left-handed thread pairs, the brake friction plates can be locked and separated by relative rotation of the left-handed thread pair and the right-handed thread pair, when the left brake friction plate 2 and the right brake friction plate 4 clamp the one-way gear 3, the brake assembly can be regarded as a whole, the one-way gear 3 is limited by a kit such as a unidirectional claw 8 and can only rotate in the counterclockwise direction (namely, the hoisting and hoisting direction) but can not rotate in the clockwise direction (namely, the loosening direction), so that the brake assembly is unidirectionally locked, namely, the hoisting roller can not rotate reversely, and the trend that the power output gear 6 rotates reversely (namely, in the clockwise direction) due to gravity is the locking trend of the thread pairs to the friction plates, namely, the friction plates are clamped more and more tight.
The hoisting operation has the highest requirement on the winch roller brake, so the hoisting operation is taken as an analysis object in the scheme. In order to ensure safety, the reverse braking state is considered to be normal for the winching roller except for active wire loosening, so that the friction plate and the related gear in the brake assembly are separated from being locked to be called as reset, and the locking state is the reverse braking state and is considered as the reset state of the brake assembly and the brake device. The working process of the traditional winch drum braking device is as follows.
(1) Hoisting operating mode
As shown in fig. 2, the driving force from the front end drives the power input gear 1 to rotate counterclockwise, i.e. the teeth of the reading side gear face upward, the inner ring of the power input gear 1 and the left-handed thread pair on the shaft of the power output gear 6 tend to be fastened to clamp the friction plate, when the fastening force is sufficient, due to the action of the friction force, the power input gear 1, the one-way gear 3 and the power output gear 6 are equivalent to a whole, and due to the fact that the one-way gear 3 can rotate counterclockwise, the power output gear 6 drives the hoisting drum, and hoisting are achieved.
When the hoisting stops, the gravity of the hoisted object is transmitted to the one-way gear 3 through the power output gear 6 and the clamped friction plate to generate a clockwise rotation trend, and the one-way gear 3 cannot rotate clockwise, so that the hoisting drum is in a braking state.
(2) Working condition of loaded loose wire
As shown in fig. 2, the driving force at the front end drives the power input gear 1 to rotate clockwise, namely, the gear teeth at the reading side face downwards, the inner ring of the power input gear 1 and the left-handed thread pair on the shaft of the power output gear 6 tend to loosen, the one-way gear 3 is separated from the friction plate, at this time, the one-way gear 3 cannot prevent the power input gear 1 and the power output gear 6 from rotating, due to the clockwise rotation trend formed by the gravity of the lifted object, the power output gear 6 rotates clockwise, the roller moves loosely, and the lifted object descends.
When the loose wire stops, the driving force loaded on the power input gear 1 from the front end is removed, at the moment, the power output gear 6 keeps the loose wire rotating under the action of gravity, and in order to prevent the hoisted object from descending continuously, the friction plate must be locked quickly, so that the brake assembly is reset. At present, another set of auxiliary brake device linked with the power clutch is generally adopted, when the clutch is separated, namely, the driving force is removed, the auxiliary brake device is connected to the power input gear 1, the free rotation of the power input gear 1 is locked through the force transmission among the gears, so that a tight thread rotation is generated between the auxiliary brake device and the power output gear 6 rotating clockwise, namely, the rotation in the direction of a friction plate is locked, after the rotation in a certain angle, the friction plate is locked, at the moment, a brake assembly is equal to a whole, and due to the prevention of the one-way gear 3, a hoisting drum is braked reversely, and a hoisted object stops descending.
The braking process depends on that the lifted heavy object slides downwards to drive the power output gear 6 to rotate to clamp the braking friction plate, so that the friction plate is reset, and the resetting mode is called as passive resetting.
(3) No load under loose wire condition
As shown in fig. 2, the driving force at the front end drives the power input gear 1 to rotate clockwise, i.e. the gear teeth at the reading side face downwards, the inner ring of the power input gear 1 and the left-handed thread pair on the shaft of the power output gear 6 tend to loosen, the one-way gear 3 is separated from the friction plate, the power input gear 1 continues to rotate clockwise until moving to the locking plane bearing 12 leftwards under the action of the reverse thread, at this time, the power input gear 1 passes through the plane bearing 12, the locking nut 11 and the power output gear 6 to be equal to a whole, and the output gear 6 rotates in the loosening direction. When the no-load loose wire is stopped, the driving force loaded on the power input gear 1 is removed, at the moment, the output gear 6 is free from external force, the friction plate in the brake assembly is kept in a loose state, and the friction plate cannot reset under the condition of no external force intervention.
From the working process, the traditional capstan roller braking device needs to be provided with a set of complex power input gear 1 locking mechanism, namely an auxiliary braking device linked with a clutch, when the operation of loading and loosening wires is stopped, namely the driving force loaded on the power input gear 1 is removed, the power input gear 1 is locked by auxiliary braking force to rotate freely, so that the power input gear 1 and the power output gear 6 which is driven to rotate reversely by the gravity of a hoisted object rotate tightly by screw threads, the one-way gear 3 is locked by a braking friction plate, and a braking component is reset, so that the reverse braking of the capstan roller is realized.
This braking method has the following problems: 1) an auxiliary braking device linked with the power clutch is needed to lock the power input gear 1 when power is removed, so that the cost is high; 2) the linkage device and the braking device occupy a large space in the speed reducer; 3) the locking force needs to be switched along with the power, and the transmission chain of the force is long, so that the reliability is poor; 4) because the braking is dependent on a certain rotation angle of the roller and is uncontrollable, the braking has a little lag and impact.
Disclosure of Invention
Aiming at the problems that the traditional winch roller braking device is easy to cause braking failure and the like in use, the self-resetting structure of the braking component in the winch braking device is designed, the principle is that the torsion of a resetting spring is utilized to automatically drive a power input gear to rotate anticlockwise, a friction plate is actively locked, the braking component is reset, and the automatic resetting and the active resetting of the winch roller braking device are realized, and particularly, the aim of the invention can be realized through the following technical scheme:
the invention optimizes the reset mode of the brake assembly by simplifying the structure of the brake assembly reset mechanism in the winch roller brake device, simultaneously changing the original passive reset of the brake assembly into the active reset and automatically executing the reset by the reset spring. The main difference between the self-reset structure of the braking device and the original technology is that a reset spring is additionally arranged on a traditional capstan roller braking assembly to replace an original complex auxiliary braking device which occupies a large space and is linked with a clutch, namely, a power input gear locking mechanism, and the working process is as follows: the torsion spring additionally arranged between the locking nut and the power input gear is wound clockwise, the pre-elasticity of the torsion spring continuously applies a counterclockwise rotating force to the power input gear, so that the power input gear keeps the trend of locking the friction plate through internal threads, and the power output gear is ensured to be in a reverse braking state.
Specifically, a mechanical arresting gear of hank grinds is from reset structure includes:
the power output gear is provided with a rotating shaft, the rotating shaft is provided with a first thread, the power input gear is internally provided with a second thread matched with the first thread, one end of the rotating shaft is fixed with the power output gear, and the power input gear is screwed into the rotating shaft;
a first brake friction plate, a one-way gear and a second brake friction plate are sequentially arranged between the power input gear and the power output gear;
the locking nut is fixed on the rotating shaft and is positioned on one side, far away from the power output gear, of the power input gear;
an elastic force storage element is arranged between the locking nut and the power input gear, one end of the elastic force storage element is connected to the locking nut, the other end of the elastic force storage element is connected to the power input gear, when the elastic force storage element is in an initial state, the elastic force storage element exerts a tight thread rotating force on the power input gear continuously, and a brake assembly comprising the first brake friction plate, the one-way gear and the second brake friction plate is kept in a locking state, specifically in a left-handed mode.
The elastic force storage element is a return spring. The pre-twisting force of the reset spring keeps the brake assembly in a locking state, the brake assembly can be forcibly opened only under the working condition of active line loosening, after the line loosening is finished, the reset spring automatically rebounds, the brake assembly is locked, the brake device is in a resetting state, and the winching drum is reversely locked.
The locking nut and the power input gear are provided with pin holes for fixing the return spring, two ends of the return spring are provided with pins, and the two pins are respectively inserted into the two pin holes.
And a third thread is arranged on the rotating shaft and is positioned at one end of the second thread, which is far away from the power output gear main body, and a fourth thread matched with the third thread is arranged in the locking nut.
The third thread has a pitch less than the first thread.
And a bushing is arranged on the rotating shaft and is positioned among the first brake friction plate, the one-way gear, the second brake friction plate and the rotating shaft.
And a plane bearing is arranged between the locking nut and the power input gear.
The elastic force storage element is sleeved outside the plane bearing.
The structure also comprises a limiting mechanism used for limiting the unidirectional rotation of the unidirectional gear.
The limiting mechanism comprises a one-way claw, a spring and a one-way transition gear, the spring is installed between the one-way claw and the box body, the other end of the spring is fixed, and the one-way transition gear is meshed with the one-way claw and the one-way gear respectively.
Hoisting working conditions are as follows: the driving force from the front end drives the power input gear to rotate anticlockwise, namely the gear teeth of the reading side gear face upwards, the inner ring of the power input gear tends to be fastened with the left-handed thread pair on the power output gear shaft, the friction plate is locked by the reset spring, the brake assembly is identical to a whole, and the unidirectional gear can rotate anticlockwise, so that the anticlockwise rotation of the power input gear and the power output gear cannot be prevented, and the hoisting can be realized. When the hoisting stops, the power input gear keeps the trend of locking the friction plate under the action of the return spring, and the hoisting roller is in a reverse braking state.
The working condition of load loosening: the driving force at the front end drives the power input gear to overcome the friction resistance and the torsion of the return spring, and the power input gear rotates clockwise, namely the gear teeth at the reading side face downwards, so that the one-way gear is separated from the friction plate. The winching roller is driven by the gravity of the hoisted object to do loose line motion, and the hoisted object descends. When the loose wire stops, the driving force loaded on the power input gear is removed, at the moment, the reset spring torsion automatically drives the power input gear to rotate anticlockwise, the friction plate is actively locked, the brake assembly resets, and reverse braking on the winch drum is realized.
And (3) no-load loose wire working condition: the driving force at the front end drives the power input gear to overcome the friction resistance and the torsion of the return spring, the power input gear rotates clockwise to separate the one-way gear from the friction plate, the power input gear continues to rotate clockwise until the gear moves leftwards to lock the plane bearing under the action of the reverse threads, at the moment, the power input gear is equal to the power output gear into a whole through the plane bearing and the locking nut, and the power input gear pushes the power output gear to move in a loosening mode. After the loose wire stops, the driving force loaded on the power input gear is removed, at the moment, the torsion of the reset spring automatically drives the power input gear to rotate anticlockwise, the friction plate is actively locked, the brake assembly is reset, and the reverse brake of the winch drum is realized.
It can be seen from the comparison of the working processes that the braking of the roller in the traditional winching mill depends on the descending of the hoisted object to drive the power output gear to rotate in the reverse direction, and then the power output gear and the power input gear which is forcibly locked by the auxiliary braking device generate tight thread rotation to lock the friction plate, so that the braking assembly is reset, and the winch belongs to passive reset. The invention adopts the reset spring to reset, can realize the active and automatic reset of the brake assembly, relatively speaking, greatly simplifies the structure of the reset mechanism of the brake assembly and improves the reset reliability of the brake assembly. Compared with the prior art, the invention has the following beneficial effects: through setting up reset spring, consequently can realize ordering about power input gear automatic re-setting when power input gear loses external drive power and be close to power output gear to do not need external auxiliary structure, reduce equipment volume, effective reduce cost.
Drawings
FIG. 1 is a schematic view of the components of a conventional capstan roller brake assembly
FIG. 2 is a schematic view of the assembly of a conventional capstan roller brake assembly
FIG. 3 is a schematic view of the components of the brake assembly of the present invention
FIG. 4 is a schematic diagram of the lifting state and the reverse braking state of the braking assembly of the present invention
FIG. 5 is a schematic view of the brake assembly in a released state according to the present invention
Wherein: 1. the brake device comprises a power input gear, 2, a first brake friction plate, 3, a one-way gear, 4, a second brake friction plate, 5, a bushing, 6, a power output gear, 7, the one-way gear, 8, a one-way claw, 9, a spring, 10, a fixing pin, 11, a locking nut, 12, a plane bearing, 13, a return spring, 14 and a rotating shaft.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A self-resetting structure of a mechanical braking device of a winching machine can be applied to winches except for winching equipment, and a linkage auxiliary braking device, namely a power input gear 1 forced locking mechanism, is eliminated on the basis of a traditional winching roller braking device, as shown in figures 3 to 5. A return spring 13 is additionally arranged between a locking nut 11 and a power input gear 1 of the traditional grinding roller brake assembly. The reset spring 13 additionally arranged between the locking nut 11 and the power input gear 1 is wound clockwise, during installation, the power input gear 1 is rotated anticlockwise until the friction plate is locked, the left pin of the spring is inserted into the pin hole on the locking nut 11, the right pin is twisted clockwise to tightly rotate the reset spring by force for about 120 degrees, and the reset spring is inserted into the pin hole on the left side surface of the power input gear 1.
At this time, the return spring 13 generates a continuous torsion pretightening force to the power input gear 1, so that the power input gear 1 locks the brake friction plate to keep a braking state.
The return spring 13 must have a large rebound torsion to ensure that the loose thread resistance of the power input gear 1 after being tightened with the plane bearing 12 in the no-load loose-line working condition can be overcome.
Hoisting operation: as shown in fig. 4, the power input gear 1 rotates counterclockwise, the friction plates are locked by the return spring, the brake assembly is identical to a whole, and the object is hoisted and lifted since the one-way gear 3 allows the power output gear 6 to rotate counterclockwise. When the hoisting stops, the driving force is removed, the power input gear 1 is separated from the power input end, the friction plate is continuously kept locked under the action of the torsion force of the return spring 13, and the hoisting roller is in a braking state.
Descending of the hoisting object: as shown in fig. 5, the power input gear 1 rotates clockwise, overcomes the frictional resistance and the torsion of the return spring 13, and releases the friction plate. The winching machine is driven by the gravity of the hoisting object to do loose line motion, and the hoisting object descends. When the loose wire stops, the driving force loaded on the power input gear 1 is removed, at the moment, the power input gear 1 is separated from the power input end, the torsion of the reset spring 13 automatically drives the power input gear 1 to rotate anticlockwise, the friction plate is actively locked, the brake assembly is reset, and the brake of the pair-twisting grinding winch drum is realized.
And (3) no-load descending: as shown in fig. 5, the power input gear 1 overcomes the friction resistance and the torsion of the return spring 13, rotates clockwise to separate the one-way gear 3 from the friction plate, the power input gear 1 continues to rotate clockwise until moving to the locking plane bearing 12 under the action of the reverse thread, at this time, the power input gear 1 is equivalent to the power output gear 6 through the plane bearing 12 and the locking nut 11, and the power input gear 1 pushes the power output gear 6 to perform the loose-line motion, namely, the empty hook descends. When the loose wire stops, the driving force loaded on the power input gear 1 is removed, at the moment, the power input gear 1 is separated from the power input end, the torsion of the reset spring 13 automatically overcomes the loose thread resistance after the power input gear 1 and the plane bearing 12 are tightened, the power input gear 1 is driven to rotate anticlockwise, the friction plate is actively locked, the brake assembly is reset, and the braking of the pair-twisting grinding winch drum is realized.
In some other embodiments, the return spring 13 is inserted into the pin of the lock nut 11, and may be designed to be directly inserted into the rotating shaft 14 or be disposed on another component fixed to the rotating shaft 14, in which case the lock nut 11 is only used for locking and adjusting the rotation angle of the power input gear 1.
In some other embodiments, the return spring 13 may be replaced by other elastic force storage elements, such as a compression spring, rubber, air pressure, etc., besides a torsion spring, to achieve similar effects.
Claims (10)
1. A self-resetting structure of a mechanical brake of a winching, comprising:
the power output gear (6) is provided with a rotating shaft (14), the rotating shaft (14) is provided with a first thread, the power input gear (1) is provided with a second thread matched with the first thread, one end of the rotating shaft (14) is fixed with the power output gear (6), and the power input gear (1) is screwed into the rotating shaft (14);
a first brake friction plate (2), a one-way gear (3) and a second brake friction plate (4) are sequentially arranged between the power input gear (1) and the power output gear (6);
the locking nut (11) is fixed on the rotating shaft (14) and is positioned on one side, far away from the power output gear (6), of the power input gear (1);
the brake device is characterized in that an elastic force storage element is arranged between the locking nut (11) and the power input gear (1), one end of the elastic force storage element is connected to the locking nut (11), the other end of the elastic force storage element is connected to the power input gear (1), when the elastic force storage element is in an initial state, the elastic force storage element exerts a tight thread rotating force on the power input gear (1) continuously through pre-elasticity, and a brake assembly comprising the first brake friction plate (2), the one-way gear (3) and the second brake friction plate (4) is kept in a locking state.
2. A self-resetting structure of a mechanical braking device of a grinder as claimed in claim 1, characterized in that the elastic force-storing element is a return spring (13).
3. The self-resetting structure of a mechanical brake device of a grinder as claimed in claim 2, wherein the locking nut (11) and the power input gear (1) are provided with pin holes for fixing the return spring (13), and the two ends of the return spring (13) are provided with pins which are inserted into the two pin holes respectively.
4. The self-resetting structure of a mechanical brake device of a grinder as claimed in claim 1, wherein the rotating shaft (14) is provided with a third thread at one end of the second thread far from the main body of the power output gear (6), and the locking nut (11) is provided with a fourth thread matching with the third thread.
5. The self-resetting structure of a mechanical brake device of a grinder of claim 4, wherein the third thread has a smaller pitch than the first thread.
6. A self-resetting structure of a mechanical brake device of a winching according to claim 1, wherein the rotating shaft (14) is provided with a bushing (5), and the bushing (5) is located between the first brake friction plate (2), the one-way gear (3) and the second brake friction plate (4) and the rotating shaft (14).
7. A self-resetting structure of a mechanical braking device of a grinder as claimed in claim 1, characterised in that a plane bearing (12) is provided between the locking nut (11) and the power input gear (1).
8. A self-resetting construction of a mechanical brake device of a grinder as claimed in claim 7, characterized in that the elastic force-storing element is fitted outside the flat bearing (12).
9. The self-resetting structure of a mechanical braking device of a grinder according to claim 1, characterized in that the structure further comprises a limiting mechanism for limiting the unidirectional rotation of the unidirectional gear (3).
10. The self-resetting structure of the mechanical braking device of the grinder as claimed in claim 9, wherein the limiting mechanism comprises a one-way claw (8), a spring (9) and a one-way transition gear (7), the spring (9) is installed between the one-way claw (8) and the box body, the other end of the spring is fixed, and the one-way transition gear (7) is respectively meshed with the one-way claw (8) and the one-way gear (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110777189.5A CN113401828A (en) | 2021-07-09 | 2021-07-09 | Self-reset structure of mechanical braking device of winching mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110777189.5A CN113401828A (en) | 2021-07-09 | 2021-07-09 | Self-reset structure of mechanical braking device of winching mill |
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| Publication Number | Publication Date |
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| CN113401828A true CN113401828A (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110777189.5A Pending CN113401828A (en) | 2021-07-09 | 2021-07-09 | Self-reset structure of mechanical braking device of winching mill |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3519247A (en) * | 1968-03-25 | 1970-07-07 | Gearmatic Co Ltd | Freewheel final drive assembly |
| CN2630222Y (en) * | 2003-02-28 | 2004-08-04 | 云南省机械研究设计院 | Spiral load disk brake traction device |
| TWM318013U (en) * | 2007-02-09 | 2007-09-01 | Yi-De Pan | Safety apparatus of integrated over-loading and braking for load-bearing winding mechanism |
| CN206142724U (en) * | 2016-08-30 | 2017-05-03 | 浙江冠林机械有限公司 | Endless chain turn -buckle |
| CN212687426U (en) * | 2020-06-30 | 2021-03-12 | 蒋晓峰 | New forms of energy hank grinds with thing networking function |
| CN215516476U (en) * | 2021-07-09 | 2022-01-14 | 上海送变电工程有限公司 | Self-reset structure of mechanical braking device of winching mill |
-
2021
- 2021-07-09 CN CN202110777189.5A patent/CN113401828A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3519247A (en) * | 1968-03-25 | 1970-07-07 | Gearmatic Co Ltd | Freewheel final drive assembly |
| CN2630222Y (en) * | 2003-02-28 | 2004-08-04 | 云南省机械研究设计院 | Spiral load disk brake traction device |
| TWM318013U (en) * | 2007-02-09 | 2007-09-01 | Yi-De Pan | Safety apparatus of integrated over-loading and braking for load-bearing winding mechanism |
| CN206142724U (en) * | 2016-08-30 | 2017-05-03 | 浙江冠林机械有限公司 | Endless chain turn -buckle |
| CN212687426U (en) * | 2020-06-30 | 2021-03-12 | 蒋晓峰 | New forms of energy hank grinds with thing networking function |
| CN215516476U (en) * | 2021-07-09 | 2022-01-14 | 上海送变电工程有限公司 | Self-reset structure of mechanical braking device of winching mill |
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