CN108298451B - Rope sheave for elevator guide rail that security performance is high - Google Patents
Rope sheave for elevator guide rail that security performance is high Download PDFInfo
- Publication number
- CN108298451B CN108298451B CN201810076867.3A CN201810076867A CN108298451B CN 108298451 B CN108298451 B CN 108298451B CN 201810076867 A CN201810076867 A CN 201810076867A CN 108298451 B CN108298451 B CN 108298451B
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- China
- Prior art keywords
- rotating shaft
- self
- cylinder
- shaped fixture
- rope pulley
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- 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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- 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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- 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
- B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
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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
- B66D5/30—Operating devices electrical
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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
- B66D5/32—Detent devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention provides a rope pulley for a guide rail of a hoist with high safety performance, which comprises a mounting seat, a rotating shaft rotatably connected with the upper end of the mounting seat, a rope pulley fixedly connected with the rotating shaft and a self-locking device for self-locking the rotating shaft, wherein the rotating shaft respectively penetrates through the upper end of the mounting seat and the rope pulley, is rotatably connected with the mounting seat and is fixedly connected with the rope pulley; the rope sheave self-locking device comprises a rotating shaft, a rope sheave, a self-locking device and a rope sheave, wherein a groove is formed in the end part of one side of the rotating shaft in the axial direction, the self-locking device comprises a fixed seat, a cylinder with a cavity extending outwards and arranged on the upper portion of the fixed seat, and a self-locking structure arranged in the cavity of the cylinder, the other end of the cylinder extends into the groove, and the self-locking structure extends out of. The rope wheel is simple in structure and powerful in function, can detect abnormal operation of the elevator, and can brake the elevator to run, so that materials in the elevator can be protected.
Description
Technical Field
The invention relates to a rope pulley, in particular to a rope pulley for a guide rail of a hoist with high safety performance.
Background
The elevator is a vertical elevator taking a motor as power, is provided with a box-shaped nacelle and is used for carrying goods in a multi-storey building, is used as a transportation means in the vertical direction, is an important building device in high-rise buildings and public places, drives a top wheel to rotate through the motor so as to pull a hauling rope to move up and down, and then pulls the elevator to move up and down.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, the present invention aims to provide a sheave for a guide rail of a hoisting machine with high safety performance, which is used for solving the problem of material casualty caused by rapid descending due to failure of the hoisting machine in the prior art.
In order to achieve the above and other related objects, the present invention provides a rope sheave for a guide rail of a hoist, which has high safety performance, and comprises a mounting seat, a rotating shaft rotatably connected with the upper end of the mounting seat, a rope sheave fixedly connected with the rotating shaft, and a self-locking device for self-locking the rotating shaft, wherein the rotating shaft respectively penetrates through the upper end of the mounting seat and the rope sheave, the rotating shaft is rotatably connected with the mounting seat, and the rotating shaft is fixedly connected with the rope sheave; the method is characterized in that: the rope sheave self-locking device comprises a rotating shaft, a rope sheave, a self-locking device and a rope sheave, wherein a groove is formed in the end part of one side of the rotating shaft in the axial direction, the self-locking device comprises a fixed seat, a cylinder with a cavity extending outwards and arranged on the upper portion of the fixed seat, and a self-locking structure arranged in the cavity of the cylinder, the other end of the cylinder extends into the groove, and the self-locking structure extends out of.
Preferably, a circle of a plurality of clamping teeth which are uniformly laid are arranged on the side wall of the groove.
Preferably, the auto-lock structure includes a extensible member and a chuck, chuck outside one end with drum open end tip adopts the slide rail to link to each other, and the stiff end of extensible member is arranged in the drum cavity and be fixed in the mount pad, the flexible end of extensible member is close to the chuck, the axis of extensible member with the axis of chuck is in on the same axis.
Preferably, the chuck comprises a disk with a boss, the axis of the disk is in the same direction with the axis of the cylinder, and the boss faces one side of the cylinder.
Preferably, a circle of L-shaped fixture blocks which are uniformly distributed are arranged on the disc and surround the outer side of the boss, the L-shaped fixture blocks are connected with the boss through springs, and the vertical section of each L-shaped fixture block is connected with the opening end of the cylinder through a sliding rail.
Preferably, the horizontal segment of the L-shaped clamping block faces the end of the telescopic member and is provided with a notch, so that the thickness of the horizontal segment of the L-shaped clamping block close to the telescopic member is the lowest, and the thickness of the horizontal segment of the L-shaped clamping block increases sequentially after the horizontal segment of the L-shaped clamping block is far away from the telescopic member.
Preferably, a rotation speed detector is arranged on the mounting seat and electrically connected with the telescopic piece through a controller
As described above, the sheave for a hoist guide rail having high safety according to the present invention has the following advantageous effects:
when the elevator is abnormal and the elevator descends rapidly, the rotating speed detector detects that the rotating speed of the rotating shaft is abnormal, the rotating speed exceeds a threshold value, the rotating speed detector transmits a signal to the controller, the controller starts the telescopic piece, the telescopic piece stretches into a plurality of L-shaped clamping blocks to stretch the L-shaped clamping blocks along the sliding rail to the outer side of the cylinder, one side of each L-shaped clamping block is in contact with the clamping teeth on the inner side of the cylinder until each L-shaped clamping block is arranged in the clamping tooth gap, the rotating shaft is completely clamped, the rotating speed is zero, after maintenance, the telescopic end of the telescopic piece is controlled to retract by the controller, the L-shaped clamping blocks are reset by the springs, and. The rope wheel is simple in structure and powerful in function, can detect abnormal operation of the elevator, and can brake the elevator to run, so that materials in the elevator can be protected.
Drawings
FIG. 1 is a schematic view of a sheave according to example 1;
FIG. 2 is a schematic view of a sheave according to embodiment 2;
FIG. 3 is a schematic view showing the connection between the self-locking device and the rotary shaft in embodiment 2;
FIG. 4 is a schematic view of a sheave according to example 3;
FIG. 5 is a schematic view showing the connection between the self-locking device and the rotary shaft in embodiment 3;
fig. 6 is a schematic view of the sheave according to example 4.
Fig. 7 is a schematic view showing the connection between the self-locking device and the rotating shaft in embodiment 4.
Description of the element reference numerals
1 mounting base
2 rotating shaft
3 rope wheel
4 disc
5 fixing plate
61 rubber block
62 connecting rod
63 expansion piece
7 column
71 rubber bag
72 wear layer
73 oil pump
74 electromagnetic layer
75 clamping block
9 fixed seat
91 cylinder
92L-shaped latch
93 boss
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the disclosure herein, wherein the following description is provided for illustrative embodiments of the present invention. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example 1
Referring to fig. 1, the present invention provides a rope sheave for a guide rail of an elevator, which has high safety performance, and includes a mounting base 1, a rotating shaft 2 rotatably connected to an upper end of the mounting base 1, a rope sheave 3 fixedly connected to the rotating shaft 2, and a self-locking device for self-locking the rotating shaft 2, wherein one side of the rotating shaft 2 penetrates through an upper end of the mounting base 1, and the other side of the rotating shaft 2 is fixedly connected to the rope sheave 3; a disc 4 is arranged on the rotating shaft 2, a self-locking device is arranged on the periphery of the disc 4 and is fixed on the mounting base 1 through a fixing plate (5), the self-locking device comprises two clamping mechanisms which are respectively arranged on two sides of the disc 4, and the disc 4 can be clamped through the clamping mechanisms; the clamping mechanism comprises a connecting rod 62 and a rubber block 61, the rubber block 61 is arranged at the top end of the connecting rod 62, the bottom of the connecting rod 62 is rotatably connected with the fixed plate (5), the two connections are connected through an expansion piece 63, the expansion piece 63 can adopt a hydraulic cylinder or an air cylinder, and the expansion piece 63 expands and contracts to drive the two clamping mechanisms to move relatively, so that the disc 4 is clamped. A rotating speed detector is arranged on the mounting base 1 and is electrically connected with the telescopic piece 63 through a controller, and a rotating speed threshold value of the rotating shaft 2 is arranged in the rotating speed detector.
The working principle is as follows:
2 parts of pivot that are connected with mount pad 1 are rotatory under elevating gear (not drawn in the picture) drives, 2 rotational speeds of pivot are monitored in real time to rotational speed detector this moment, the rotational speed detector detects the rotational speed of pivot 2 unusual when the lifting machine appears unusually and the lifting machine descends rapidly, the rotational speed exceeds the threshold value, rotational speed detector is with signal transmission to controller this moment, controller control extensible member 63 contracts, two clamp dress mechanism relative motion block disc 4, disc 4 and block rubber 61 wear each other and descend 2 rotational speeds of pivot, until the rotational speed is zero, after the maintenance is accomplished, controller control extensible member 63 resets.
Example 2
Referring to fig. 2 and 3, the invention provides a rope sheave 3 for a guide rail of a hoist, which has high safety performance, and comprises a mounting base 1, a rotating shaft 2 rotatably connected with the upper end of the mounting base 1, a rope sheave 3 fixedly connected with the rotating shaft 2, and a self-locking device for self-locking the rotating shaft 2, wherein one side of the rotating shaft 2 penetrates through the upper end of the mounting base 1, the other side of the rotating shaft 2 is fixedly connected with the rope sheave 3, the self-locking device is sleeved on the rotating shaft 2, and the self-locking device is fixed on the mounting base 1 through a fixing plate (5). The self-locking device comprises an upright post 7 sleeved on the rotating shaft 2, and the bottom of the upright post 7 is fixed on the fixing plate (5) and does not rotate along with the rotating shaft 2; the upright post 7 is provided with a through hole for the rotating shaft 2 to pass through, the wall of the through hole is provided with a circle of hollow rubber bag 71, an inlet extends out of any position of the rubber bag 71, the inlet is connected with an oil pump 73 on the outer side through an oil pipe, and the oil pipe is provided with a valve for controlling the flow rate. The outer part of the rotating shaft 2 penetrating through the upright post 7 is wrapped with a wear-resistant layer 72 which is used for directly contacting with the rubber ring to protect the surface of the rotating shaft 2.
A rotating speed detector is arranged on the mounting base 1 and is electrically connected with the oil pump 73 through a controller, and a rotating speed threshold value of the rotating shaft 2 is arranged in the rotating speed detector.
The working principle is as follows:
the part of the rotating shaft 2 connected with the mounting base 1 is driven by a lifting device (not shown in the figure) to rotate, at the moment, the rotating speed detector monitors the rotating speed of the rotating shaft 2 in real time, when the elevator is abnormal and the elevator rapidly descends, the rotating speed detector detects that the rotating speed of the rotating shaft 2 is abnormal, the rotating speed exceeds a threshold value, at the moment, the rotating speed detector transmits a signal to the controller, the controller starts the oil pump 73, opens the valve, pumps lubricating oil into the rubber bag 71 to expand until the lubricating oil is in contact with the wear-resistant layer 72 on the rotating shaft 2 after expansion, then the lubricating oil is continuously expanded until the rubber bag 71 completely covers the surface of the wear-resistant layer 72, the lubricating oil and the rubber bag 71 rub to form resistance, the rotating speed of the rotating shaft 2 is reduced until the rotating speed is zero, after maintenance, the lubricating oil in the.
Example 3
Referring to fig. 4 and 5, the invention provides a rope pulley for a guide rail of a hoist with high safety performance, which comprises a mounting base 1, a rotating shaft 2 rotatably connected with the upper end of the mounting base 1, a rope pulley 3 fixedly connected with the rotating shaft 2 and a self-locking device for self-locking the rotating shaft 2, wherein the rotating shaft 2 respectively penetrates through the upper end of the mounting base 1 and the rope pulley 3, the rotating shaft 2 is rotatably connected with the mounting base 1, and the rotating shaft 2 is fixedly connected with the rope pulley 3; a groove is formed in the end portion of one side of the rotating shaft 2 in the axial direction, and a circle of a plurality of clamping teeth which are evenly laid are arranged on the side wall of the groove. The self-locking device comprises a fixing seat 9, a cylinder 91 with a cavity and extending outwards and a self-locking structure arranged in the cavity of the cylinder 91, wherein the upper part of the fixing seat 9 is provided with the self-locking structure, the other end of the cylinder 91 extends into the groove, and the self-locking structure extends out of the cylinder 91 to be clamped when the rope pulley 3 runs abnormally. When the rope pulley 3 normally runs, the cylinder 91 is not in contact with the rotating shaft 2, and when the rope pulley 3 is abnormal, the self-locking structure extends out of the cylinder 91 and then is in contact with the rotating shaft 2 to clamp the rotating shaft 2, so that the rotating speed is reduced. The self-locking structure comprises an extensible member 63 and a chuck, one end of the outer side of the chuck is connected with the end part of the open end of the cylinder 91 through a sliding rail, the fixed end of the extensible member 63 is arranged in the cavity of the cylinder 91 and fixed on the mounting seat 1, the extensible end of the extensible member 63 is close to the chuck, and the axis of the extensible member 63 is located on the same axis as the axis of the chuck. The chuck comprises a disk 4 with a boss 93, wherein the axis of the disk 4 is consistent with the axial direction of the cylinder 91, and the boss 93 faces to one side of the cylinder 91. A circle of L-shaped fixture blocks 92 which are uniformly distributed are arranged on the disc 4 and surround the outer side of the boss 93, the L-shaped fixture blocks 92 are connected with the boss 93 through springs, the vertical section of each L-shaped fixture block 92 is connected with the opening end of the cylinder 91 through a slide rail, notches are formed in the horizontal sections of the L-shaped fixture blocks 92 and the end portions of the telescopic ends of the telescopic parts 63, so that the horizontal sections of the L-shaped fixture blocks 92 close to the telescopic parts 63 are the lowest in thickness, the horizontal sections of the L-shaped fixture blocks 92 are sequentially increased in thickness after being far away from the telescopic parts 63, the notches play a guiding role for the telescopic ends of the telescopic parts 63, the telescopic ends of the telescopic parts 63 stretch into a plurality of L-shaped fixture blocks 92 from the notches, and the L-shaped fixture blocks 92 are clamped into gaps between the clamping teeth.
A rotating speed detector is arranged on the mounting base 1 and is electrically connected with the telescopic piece 63 through a controller, and a rotating speed threshold value of the rotating shaft 2 is arranged in the rotating speed detector.
The working principle is as follows:
the part of the rotating shaft 2 connected with the mounting seat 1 is driven by a lifting device (not shown in the figure) to rotate, at the moment, the rotating speed detector monitors the rotating speed of the rotating shaft 2 in real time, when the elevator is abnormal and the elevator rapidly descends, the rotating speed detector detects that the rotating speed of the rotating shaft 2 is abnormal, the rotating speed exceeds a threshold value, at the moment, the rotating speed detector transmits a signal to the controller, the controller starts the telescopic piece 63, the telescopic piece 63 extends into a plurality of L-shaped clamping blocks 92 to be propped open towards the outer side of the cylinder 91 along the sliding rail, one side of each L-shaped clamping block 92 is in contact with the clamping teeth on the inner side of the cylinder 91 until each L-shaped clamping block 92 is arranged in a clamping tooth gap, the rotating shaft 2 is completely clamped, the rotating speed is zero, after maintenance, the controller controls the telescopic end of the telescopic piece 63 to.
Example 4
Referring to fig. 6 and 7, the difference from embodiment 2 is that: the invention provides a rope pulley for a guide rail of a hoist with high safety performance, which comprises an installation base 1, a rotating shaft 2 rotatably connected with the upper end of the installation base 1, a rope pulley 3 fixedly connected with the rotating shaft 2 and a self-locking device for self-locking the rotating shaft 2, wherein one side of the rotating shaft 2 penetrates through the upper end of the installation base 1, and the other side of the rotating shaft 2 is fixedly connected with the rope pulley 3; the rotating shaft 2 is sleeved with the self-locking device, and the self-locking device is installed on the installation base 1 through a fixing plate (5). The self-locking device comprises an upright post 7 sleeved on the rotating shaft 2, and the bottom of the upright post 7 is fixed on the fixing plate (5) and does not rotate along with the rotating shaft 2; the upright post 7 is provided with a through hole for the rotating shaft 2 to pass through, the cylindrical surface of the rotating shaft 2 is provided with a plurality of uniformly distributed concave holes, the concave holes are internally provided with clamping blocks 75, and the clamping blocks 75 are made of stainless steel. The latch 75 is fixed to the concave hole by a spring. The column 7 is sleeved outside the cylindrical surface of the distributed concave holes through the through holes, an electromagnetic layer 74 is laid on the side wall of the through holes, and when the electromagnetic layer 74 is electrified, magnetic force is generated on the clamping block 75 to attract the clamping block 75 to the electromagnetic layer 74. The elastic system of the spring is matched with the rotating speed threshold of the rotating shaft 2. The height of the fixture block 75 is greater than the height between the cylindrical surface of the rotating shaft 2 and the side wall of the through hole.
An external power supply, a rotating speed detector and a controller are arranged on the mounting seat 1, the rotating speed detector is electrically connected with the external power supply through the controller, a rotating speed threshold value of the rotating shaft 2 is arranged in the rotating speed detector, and the controller is connected with the electromagnetic layer 74 and supplies power to the electromagnetic layer 74 to generate magnetic force.
The working principle is as follows:
the part of the rotating shaft 2 connected with the mounting seat 1 is driven by a lifting device (not shown in the figure) to rotate, the rotating speed detector monitors the rotating speed of the rotating shaft 2 in real time, when the elevator is abnormal and the elevator rapidly descends, the rotating speed of the rotating shaft 2 is detected by the rotating speed detector, the rotating speed exceeds a threshold value, the rotating speed detector transmits a signal to the controller, the controller starts a power supply to supply power to the electromagnetic layer 74 to generate magnetic force, a clamping block 75 on the rotating shaft 2 is sucked out, one end of the clamping block 75 is tightly attached to the electromagnetic layer 74, the other end of the clamping block is located in the concave hole, the rotating shaft 2 is completely clamped, the rotating speed is reduced until the rotating speed reaches zero, after maintenance, the electromagnetic layer 74 is powered off, the clamping.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (1)
1. A rope pulley for a guide rail of a hoist with high safety performance comprises an installation base (1), a rotating shaft (2) rotatably connected with the upper end of the installation base (1), a rope pulley (3) fixedly connected with the rotating shaft (2) and a self-locking device for self-locking the rotating shaft (2), wherein the rotating shaft (2) respectively penetrates through the upper end of the installation base (1) and the rope pulley (3), the rotating shaft (2) is rotatably connected with the installation base (1), and the rotating shaft (2) is fixedly connected with the rope pulley (3); the method is characterized in that: a groove is formed in one side end portion of the rotating shaft (2) in an axially inward mode, the self-locking device comprises a fixing seat (9), a cylinder (91) with a cavity and extending outwards and arranged at the upper portion of the fixing seat (9), and a self-locking structure arranged in the cavity of the cylinder (91), one end of the cylinder (91) extends into the groove, and the self-locking structure extends out of the cylinder (91) to be clamped when the rope pulley (3) runs abnormally;
a circle of a plurality of clamping teeth which are uniformly laid are arranged on the side wall of the groove;
the self-locking structure comprises a telescopic piece (63) and a chuck, one end of the outer side of the chuck is connected with the end part of the opening end of the cylinder (91) by adopting a sliding rail, the telescopic end of the telescopic piece (63) is close to the chuck, and the axis of the telescopic piece (63) and the axis of the chuck are on the same axis;
the chuck comprises a disk with a boss (93), the axis of the disk is consistent with the axial direction of the cylinder (91), and the boss (93) faces one side of the cylinder (91);
a circle of L-shaped fixture blocks (92) which are uniformly distributed are arranged on the disc and surround the outer side of the boss (93), the L-shaped fixture blocks (92) are connected with the boss (93) through springs, and the vertical section of each L-shaped fixture block (92) is connected with the opening end of the cylinder (91) through a sliding rail;
a notch is formed in the end part, facing the telescopic end of the telescopic piece (63), of the horizontal section of the L-shaped fixture block (92), so that the thickness of the horizontal section of the L-shaped fixture block (92) close to the telescopic piece (63) is the lowest, and the thickness of the horizontal section of the L-shaped fixture block (92) is sequentially increased after the horizontal section of the L-shaped fixture block (92) is far away from the telescopic piece (63);
the mounting base (1) is provided with a rotating speed detector which is electrically connected with the telescopic piece (63) through a controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076867.3A CN108298451B (en) | 2018-01-25 | 2018-01-25 | Rope sheave for elevator guide rail that security performance is high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076867.3A CN108298451B (en) | 2018-01-25 | 2018-01-25 | Rope sheave for elevator guide rail that security performance is high |
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| Publication Number | Publication Date |
|---|---|
| CN108298451A CN108298451A (en) | 2018-07-20 |
| CN108298451B true CN108298451B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810076867.3A Active CN108298451B (en) | 2018-01-25 | 2018-01-25 | Rope sheave for elevator guide rail that security performance is high |
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| Country | Link |
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| CN (1) | CN108298451B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608368A (en) * | 2020-05-29 | 2020-09-01 | 楼妙娣 | Plastering machine convenient to move for building |
| CN111776970B (en) * | 2020-07-17 | 2021-09-07 | 嘉兴欣晟电机股份有限公司 | Double-hanging fixed type winch |
| CN113291978B (en) * | 2021-05-28 | 2022-03-29 | 天津市滨海新区检验检测中心 | Intelligent braking device for hoisting of crane |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240757A (en) * | 1990-01-27 | 1991-08-14 | Ferranti Meters Ltd Denis | Winched drum with safety devices |
| CN102659047A (en) * | 2012-05-09 | 2012-09-12 | 谢玉枝 | Winch engaging and disengaging device |
| CN205132810U (en) * | 2015-11-06 | 2016-04-06 | 杭州保利电梯导轨制造有限公司 | Car auto -lock protection rope sheave for elevator guide rail |
| CN107355492A (en) * | 2017-06-23 | 2017-11-17 | 河南省中原凌空起重设备有限公司 | A kind of crane gear foolproof apparatus |
-
2018
- 2018-01-25 CN CN201810076867.3A patent/CN108298451B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2240757A (en) * | 1990-01-27 | 1991-08-14 | Ferranti Meters Ltd Denis | Winched drum with safety devices |
| CN102659047A (en) * | 2012-05-09 | 2012-09-12 | 谢玉枝 | Winch engaging and disengaging device |
| CN205132810U (en) * | 2015-11-06 | 2016-04-06 | 杭州保利电梯导轨制造有限公司 | Car auto -lock protection rope sheave for elevator guide rail |
| CN107355492A (en) * | 2017-06-23 | 2017-11-17 | 河南省中原凌空起重设备有限公司 | A kind of crane gear foolproof apparatus |
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| Publication number | Publication date |
|---|---|
| CN108298451A (en) | 2018-07-20 |
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