CN113697704A - Electric hoist limiting device with multiple detection structures - Google Patents
Electric hoist limiting device with multiple detection structures Download PDFInfo
- Publication number
- CN113697704A CN113697704A CN202110957370.4A CN202110957370A CN113697704A CN 113697704 A CN113697704 A CN 113697704A CN 202110957370 A CN202110957370 A CN 202110957370A CN 113697704 A CN113697704 A CN 113697704A
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- China
- Prior art keywords
- sliding rod
- shell
- electric hoist
- reset
- baffle
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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
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
- B66D1/56—Adaptations of limit switches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
- B66D3/20—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/18—Power-operated hoists
- B66D3/24—Applications of limit switches
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanisms For Operating Contacts (AREA)
- Push-Button Switches (AREA)
Abstract
The invention discloses an electric hoist limiting device with a plurality of detection structures, which comprises a shell, a bolt, a reset baffle, a reset spring and a limiting baffle, wherein an insulating frame is suspended in the shell, a fin plate is fixed at the bottom of the insulating frame, the bolt penetrates through the fin plate and is in threaded connection with a nut column, the nut column is fixed at the bottom of the shell, a movable plate is arranged below the insulating frame, a conductive strip is embedded on the upper surface of the movable plate, and the bottom of the movable plate is connected with an electromagnetic switch. This electric hoist stop device with a plurality of detection structures is provided with first slide bar, A looks contact, B looks contact and electrically conductive shell fragment, in case proximity switch became invalid, the plectrum further promoted limit baffle or reset baffle, made first slide bar remove left or right, the electrically conductive shell fragment in the first slide bar outside breaks away from the electric connection with A looks contact or B looks contact simultaneously for this electric hoist stops the power supply, through two kinds of stop device combinations, not only the daily use of being convenient for has also improved the safety in utilization.
Description
Technical Field
The invention relates to the technical field of electric hoist limiting devices, in particular to an electric hoist limiting device with a plurality of detection structures.
Background
When using the electric hoist, in order to avoid the lifting height of the lifting hook to be too high to collide with the electric hoist shell, a limiting device is required to be used, so that the power supply of the electric hoist is cut off in time.
Present electric block stop device is the switch of cutting off the fire, its detection mode is comparatively single, this stop device is generally as safeties, in case this stop device triggers, the electric block cuts off the power supply in the twinkling of an eye, lead to electric parts damage in the electric block easily, present stop device relies on the rope guide to stir usually, it is higher to lift by crane when high, wire rope in the electric block needs the winding multilayer, this just leads to the rope guide to need reciprocating motion many times, can't regard as the power supply of stopper, make present stop device can't be suitable for this type of electric block, it is not wide to use application scope, and current stop device can't highly adjust according to the in-service use of electric block usually, use practicality inadequately, to the problem, need improve current equipment.
Disclosure of Invention
The invention aims to provide an electric hoist limiting device with a plurality of detection structures, and aims to solve the problems that the existing electric hoist limiting device proposed in the background art is a fire-cut switch, the detection mode is single, the limiting device is usually used as a safety device, once the limiting device is triggered, an electric hoist is powered off instantly, and electrical components in the electric hoist are easily damaged.
In order to achieve the purpose, the invention provides the following technical scheme: a limiting device of an electric hoist with a plurality of detection structures comprises a shell, a bolt, a reset baffle, a reset spring and a limiting baffle,
an insulation frame is suspended in the shell, a fin plate is fixed at the bottom of the insulation frame, the bolt penetrates through the fin plate and is in threaded connection with a nut column, the nut column is fixed at the bottom of the shell, a movable plate is arranged below the insulation frame, a conductive strip is embedded on the upper surface of the movable plate, the bottom of the movable plate is connected with an electromagnetic switch, the electromagnetic switch is fixed at the bottom of the shell, a shell cover is installed at the top of the shell, and connecting plates are welded and fixed at four corners of the outer side of the shell;
the center of the insulating frame is provided with a groove, a first sliding rod is suspended in the groove, two A-phase contacts and two B-phase contacts are fixedly embedded in the insulating frame, a conductive elastic sheet is fixed on the outer side of the first sliding rod, the outer end of the conductive elastic sheet is attached to the A-phase contacts or the B-phase contacts, two sides of the first sliding rod are respectively connected with a support in a sliding mode, the bottom of the support is fixed in the shell, and the top of the support on one side in the shell is fixed with the C-phase contacts;
a sliding hole is formed in the first sliding rod, a second sliding rod is connected to the inside of the sliding hole in a sliding mode, a compression knob is connected to the top of the first sliding rod in a threaded mode, reset baffles are fixedly installed at two ends of the first sliding rod, and a reset spring is installed between each reset baffle and the corresponding support;
second slide bar one side fixed mounting has limit baffle, and all installs proximity switch on the limit baffle and on the baffle that resets of first slide bar one side, the inside rotation of casing is connected with ball, and ball right-hand member runs through the casing and is connected with connecting gear, ball middle part with dial board one side threaded connection, and dial board opposite side and second slide bar sliding connection.
Preferably, four nut columns are arranged, and the four nut columns are respectively arranged at four corners of the insulating frame;
through adopting above-mentioned technical scheme, four bolts run through fin and four nut post threaded connection, make the insulating frame fixed more firm.
Preferably, two conductive strips are arranged, and the two conductive strips are respectively arranged corresponding to the two A-phase contacts and the two B-phase contacts;
through adopting above-mentioned technical scheme, be convenient for make through two conducting strips between two A looks contacts and electric connection between two B looks contacts.
Preferably, the reset baffle on the left side of the first slide bar is positioned at the leftmost end of the first slide bar, and the limit baffle is positioned at the leftmost end of the second slide bar;
through adopting above-mentioned technical scheme, be convenient for dial the board and promote second slide bar and first slide bar through promoting reset baffle or limit baffle.
Preferably, the distance between the two A-phase contacts and the distance between the two B-phase contacts are both larger than the width of the A-phase contact or the B-phase contact, and the width of the contact area between the conductive elastic sheet and the A-phase contact is equal to the width of the A-phase contact;
by adopting the technical scheme, the first sliding rod is moved, so that the conductive elastic sheet is conveniently separated from the electrical connection with the A-phase contact or the B-phase contact.
Preferably, the sliding distance of the second sliding rod in the sliding hole is smaller than the distance between the left end of the second sliding rod and the left side of the shell, and the distance between the right side of the shell and the right end of the first sliding rod is larger than the width of the contact A;
through adopting above-mentioned technical scheme, avoid the casing to lead to the fact the brill to first slide bar or second slide bar removal, make first slide bar and second slide bar move more smoothly in the casing is inside.
Preferably, the bottom of the compression knob is attached to the surface of the second sliding rod;
through adopting above-mentioned technical scheme, rotate and compress tightly the knob, be convenient for press from both sides tight second slide bar through compressing tightly the knob.
Preferably, the distance between the two reset baffles and the corresponding support is the same, and the distance between the reset baffles and the support is equal to the width of the contact point A;
through adopting above-mentioned technical scheme, the reset spring of being convenient for promotes the baffle that resets and resets.
Preferably, one side of the return spring is fixedly arranged on the bracket, and the other side of the return spring is attached to the return baffle;
through adopting above-mentioned technical scheme, avoid reset spring by tensile when this stop device operation, reduce the harm that reset spring received.
Compared with the prior art, the invention has the beneficial effects that: the electric hoist limiting device with a plurality of detection structures,
(1) is provided with a first slide bar, a second slide bar and a pressing knob, the pressing knob is loosened, the second slide bar is slid, the length of the second slide bar protruding out of the first slide bar is adjusted, the pressing knob is screwed, the connecting gear is rotated,
the shifting plate is reset, then the connecting gear is meshed with the hoisting shaft, the ball screw is driven to rotate through the connecting gear when the hoisting shaft rotates, the ball screw pushes the shifting plate to slide on the surface of the first slide bar, and the limit interval of the limiting device is changed due to the change of the protruding length of the first slide bar, so that the limit interval can be conveniently adjusted according to actual use requirements, and the limiting device has higher practicability in use;
(2) the electric hoist is provided with the limiting baffle, the reset baffle and the shifting plate, when the electric hoist winds the steel wire rope, the ball screw is driven to rotate through the connecting gear, the ball screw pushes the shifting plate to slide along the surface of the first slide rod until the surface of the first slide rod contacts the proximity switch, and the proximity switch sends a signal to the control system to stop the electric hoist;
(3) the electric hoist is provided with the first sliding rod, the A-phase contact, the B-phase contact and the conductive elastic sheet, once the proximity switch fails, the poking sheet further pushes the limiting baffle or the reset baffle to enable the first sliding rod to move leftwards or rightwards, and meanwhile, the conductive elastic sheet on the outer side of the first sliding rod is separated from the electrical connection with the A-phase contact or the B-phase contact, so that the electric hoist stops supplying power;
(4) be provided with reset spring, the baffle resets, busbar and electromagnetic switch, electrically conductive shell fragment breaks away from the back that makes the electric hoist stop the power supply with the electric connection of A looks contact or B looks contact, start electromagnetic switch through operating panel, electromagnetic switch promotes the fly leaf and rises, the busbar of fly leaf upper surface mosaic makes between two A looks contacts and between two B looks contacts electric connection, the operating personnel of being convenient for controls this electric hoist reverse operation, dial the laminating that the board breaks away from with limit baffle or the baffle that resets this moment, reset spring extrusion promotes the baffle that resets, make the electrically conductive shell fragment of first slide bar and first slide bar surface reset.
Drawings
FIG. 1 is a schematic top sectional view of the present invention;
FIG. 2 is a schematic diagram of a left side view cross-sectional structure of the present invention;
FIG. 3 is a schematic diagram of a right side view cross-sectional structure of the present invention;
FIG. 4 is a schematic top view of the insulating frame of the present invention;
FIG. 5 is a schematic top view of the movable plate of the present invention;
FIG. 6 is an enlarged view of the structure at A in FIG. 1 according to the present invention.
In the figure: 1. the device comprises a shell, 2, an insulating frame, 3, a fin plate, 4, a bolt, 5, a nut column, 6, a movable plate, 7, a conductive strip, 8, an electromagnetic switch, 9, a shell cover, 10, a connecting plate, 11, a groove, 12, a first sliding rod, 13, an A phase contact, 14, a B phase contact, 15, a conductive elastic sheet, 16, a support, 17, a C phase contact, 18, a sliding hole, 19, a second sliding rod, 20, a pressing knob, 21, a reset baffle, 22, a reset spring, 23, a limit baffle, 24, a proximity switch, 25, a ball screw, 26, a connecting gear, 27 and a shifting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution: a limiting device of an electric hoist with a plurality of detection structures is disclosed, as shown in figure 1, figure 2 and figure 5, an insulation frame 2 is suspended in a shell 1, a fin plate 3 is fixed at the bottom of the insulation frame 2, bolts 4 penetrate through the fin plate 3 and are in threaded connection with nut columns 5, the nut columns 5 are fixed at the bottom of the shell 1, four nut columns 5 are arranged, the four nut columns 5 are respectively arranged at four corners of the insulation frame 2, the four bolts 4 are respectively and fixedly arranged at four corners of the insulation frame 2, so that the connection between the insulation frame 2 and the nut columns 5 is more stable, a movable plate 6 is arranged below the insulation frame 2, conductive strips 7 are embedded on the upper surface of the movable plate 6, two conductive strips 7 are arranged, the two conductive strips 7 are respectively arranged corresponding to two A-phase contacts 13 and two B-phase contacts 14, an electromagnetic switch 8 pushes the movable plate 6 to ascend, so that the two conductive strips 7 on the surface of the movable plate 6 are respectively contacted with the two A-phase contacts 13 and the two B-phase contacts 14, the two A-phase contacts 13 and the two B-phase contacts 14 are electrically connected, the bottom of the movable plate 6 is connected with the electromagnetic switch 8, the electromagnetic switch 8 is fixed at the bottom of the shell 1, the top of the shell 1 is provided with a shell cover 9, and four corners of the outer side of the shell 1 are fixedly welded with connecting plates 10.
As shown in fig. 1, 2 and 4, a groove 11 is formed in the center of an insulating frame 2, a first slide bar 12 is suspended in the groove 11, a reset baffle 21 on the left side of the first slide bar 12 is located at the leftmost end of the first slide bar 12, a limit baffle 23 is located at the leftmost end of a second slide bar 19, when an electric hoist operates to move a hook to a limit height, a ball screw 25 pushes the limit baffle 23 or the reset baffle 21 on the left side through a shifting plate 27, so that the first slide bar 12 and the second slide bar 19 move along with the movement, two a-phase contacts 13 and two B-phase contacts 14 are fixedly embedded in the insulating frame 2, the distance between the two a-phase contacts 13 and the distance between the two B-phase contacts 14 are both greater than the width of the a-phase contacts 13 or the B-phase contacts 14, the width of the contact area between the conductive elastic sheet 15 and the a-phase contacts 13 is equal to the width of the a-phase contacts 13, when the first slide bar 12 is pushed by the shifting plate 27, the conductive elastic sheet 15 moves along with the movement and is separated from the connection with the electric wires of the A-phase contact 13 and the B-phase contact 14, so that the electric hoist loses power supply, the conductive elastic sheet 15 is fixed on the outer side of the first sliding rod 12, the outer end of the conductive elastic sheet 15 is attached to the A-phase contact 13 or the B-phase contact 14, two sides of the first sliding rod 12 are respectively connected with a support 16 in a sliding mode, and the bottom of the support 16 is fixed inside the shell 1.
As shown in fig. 1, 2, 3 and 6, a C-phase contact 17 is fixed at the top of a support 16 at one side inside a housing 1, a sliding hole 18 is formed inside a first sliding rod 12, a second sliding rod 19 is connected inside the sliding hole 18 in a sliding manner, the sliding distance of the second sliding rod 19 in the sliding hole 18 is smaller than the distance between the left end of the second sliding rod 19 and the left side of the housing 1, and the distance between the right side of the housing 1 and the right end of the first sliding rod 12 is larger than the width of the a-phase contact 13, so as to prevent the first sliding rod 12 or the second sliding rod 19 from impacting the inner wall of the housing 1 when being pushed by a dial plate 27, a pressing knob 20 is connected at the top of the first sliding rod 12 through a thread, the bottom of the pressing knob 20 is attached to the surface of the second sliding rod 19, the pressing knob 20 is rotated to press the second sliding rod 19, so that the second sliding rod 19 is tightly connected with the first sliding rod 12, return baffles 21 are fixedly installed at two ends of the first sliding rod 12, a reset spring 22 is arranged between the reset baffle 21 and the bracket 16, the distance between the two reset baffles 21 and the corresponding bracket 16 is the same, the distance between the reset baffle 21 and the bracket 16 is equal to the width size of the A-phase contact 13, one side of the reset spring 22 is fixedly arranged on the bracket 16, the other side of the reset spring 22 is attached to the reset baffle 21, the reset spring 22 is prevented from being stretched when the distance between the reset baffle 21 and the bracket 16 is enlarged, the damage of the reset spring 22 caused by stretching is reduced, a limit baffle 23 is fixedly arranged on one side of the second slide bar 19, proximity switches 24 are arranged on the limit baffle 23 and the reset baffle 21 on one side of the first slide bar 12, a ball screw 25 is rotatably connected inside the shell 1, the right end of the ball screw 25 penetrates through the shell 1 to be connected with a connecting gear 26, and the middle part of the ball screw 25 is in threaded connection with one side of a shifting plate 27, and the other side of the dial plate 27 is connected with the second slide bar 19 in a sliding way.
The working principle is as follows: when the electric hoist limiting device with a plurality of detection structures is used, the model of the proximity switch 24 is E2A-M12LS04-M1, firstly, three-phase electric wires of an external power supply are respectively and electrically connected with the A-phase contact 13, the B-phase contact 14 and the C-phase contact 17, then the three-phase electric wires of a driving motor in the electric hoist are respectively and electrically connected with the C-phase contact 17, the other A-phase contact 13 and the other B-phase contact 14, the pressing knob 20 is loosened by rotating, the second sliding rod 19 is slid along the sliding hole 18, the protruding length of the second sliding rod 19 is adjusted, the pressing knob 20 is screwed, the second sliding rod 19 is connected and fastened with the first sliding rod 12, the connecting gear 26 is rotated to enable the shifting plate 27 to be reset, the shell 1 is fixedly installed on the electric hoist shell through the connecting plate 10, meanwhile, the connecting gear 26 is meshed with a winding shaft on the electric hoist, and the limiting interval can be conveniently adjusted according to the actual use condition of the electric hoist through the operation, the applicability is improved, the application range is wider, an external power supply is connected, the external power supply supplies power to a driving motor through a C-phase contact 17, two A-phase contacts 13, two B-phase contacts 14 and a corresponding conductive elastic sheet 15, the driving motor drives a winding shaft to rotate, the winding shaft winds or discharges a steel wire rope to enable a lifting hook to ascend or descend, at the moment, a connecting gear 26 pushes a shifting plate 27 to slide along the surface of a second sliding rod 19 through a ball screw 25 until the lifting hook moves to a limit height, at the moment, the shifting plate 27 contacts a proximity switch 24, the proximity switch 24 sends a signal to a control system to enable the electric hoist to stop running, once the proximity switch 24 fails, the electric hoist continuously runs, the ball screw 25 further pushes the shifting plate 27 to move, the shifting plate 27 pushes a limit baffle 23 or a reset baffle 21 on the left side, the second sliding rod 19 and the first sliding rod 12 move leftwards or rightwards, two brackets 16 support the first sliding rod 12, the first sliding rod 12 slides more smoothly, at the moment, the conductive elastic sheet 15 moves along with the first sliding rod 12 until the conductive elastic sheet 15 is separated from the joint with the two A phase contacts 13 and the two B phase contacts 14, so that the electric hoist loses power supply instantly, by the structure, daily use and emergency insurance are considered, the use safety is greatly improved, meanwhile, the limiting device does not depend on a rope guider and is more suitable for the electric hoist needing multilayer winding of steel wire ropes, the use is more practical, the electromagnetic switch 8 is started through the control panel, the electromagnetic switch 8 pushes the movable plate 6 to ascend, the conductive strip 7 on the surface of the movable plate 6 is adhered to the bottoms of the A phase contacts 13 and the B phase contacts 14, the two A phase contacts 13 and the B phase contacts 14 are electrically connected through the conductive strip 7, the electric hoist recovers power supply, the motor is driven by reverse operation, the shifting plate 27 is separated from the extrusion limiting baffle 23 or the left reset baffle 21, the first sliding rod 12 is reset under the pushing of the resilience of the return spring 22, and the conductive elastic sheet 15 outside the first sliding rod 12 simultaneously contacts the two a-phase contacts 13 or the two B-phase contacts 14, so as to restore the power supply to the electric hoist, which completes the whole work and is not described in detail in the present specification and is well known in the prior art by those skilled in the art.
The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be considered limiting of the claimed invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides an electric hoist stop device with a plurality of detection structures, includes casing (1), bolt (4), reset baffle (21), reset spring (22) and limit baffle (23), its characterized in that:
an insulating frame (2) is suspended in the shell (1), a fin plate (3) is fixed at the bottom of the insulating frame (2), a bolt (4) penetrates through the fin plate (3) and is in threaded connection with a nut column (5), the nut column (5) is fixed at the bottom of the shell (1), a movable plate (6) is arranged below the insulating frame (2), a conductive strip (7) is embedded on the upper surface of the movable plate (6), the bottom of the movable plate (6) is connected with an electromagnetic switch (8), the electromagnetic switch (8) is fixed at the bottom of the shell (1), a shell cover (9) is installed at the top of the shell (1), and four corners of the outer side of the shell (1) are fixedly welded with connecting plates (10);
a groove (11) is formed in the center of the insulating frame (2), a first sliding rod (12) is suspended in the groove (11), two A-phase contacts (13) and two B-phase contacts (14) are fixedly embedded in the insulating frame (2), a conductive elastic sheet (15) is fixed on the outer side of the first sliding rod (12), the outer end of the conductive elastic sheet (15) is attached to the A-phase contacts (13) or the B-phase contacts (14), two sides of the first sliding rod (12) are respectively in sliding connection with a support (16), the bottom of the support (16) is fixed in the shell (1), and a C-phase contact (17) is fixed at the top of the support (16) on one side in the shell (1);
a sliding hole (18) is formed in the first sliding rod (12), a second sliding rod (19) is connected to the inside of the sliding hole (18) in a sliding mode, a pressing knob (20) is connected to the top of the first sliding rod (12) in a threaded mode, reset baffles (21) are fixedly installed at two ends of the first sliding rod (12), and reset springs (22) are installed between the reset baffles (21) and the support (16);
second slide bar (19) one side fixed mounting has limit baffle (23), and all installs proximity switch (24) on limit baffle (23) and on reset baffle (21) of first slide bar (12) one side, casing (1) internal rotation is connected with ball (25), and ball (25) right-hand member runs through casing (1) and is connected with connecting gear (26), ball (25) middle part with dial board (27) one side threaded connection, and dial board (27) opposite side and second slide bar (19) sliding connection.
2. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the number of the nut columns (5) is four, and the four nut columns (5) are respectively arranged at four corners of the insulating frame (2).
3. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the number of the conductive strips (7) is two, and the two conductive strips (7) are respectively arranged corresponding to the two A-phase contacts (13) and the two B-phase contacts (14).
4. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the reset baffle (21) on the left side of the first sliding rod (12) is positioned at the leftmost end of the first sliding rod (12), and the limit baffle (23) is positioned at the leftmost end of the second sliding rod (19).
5. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the distance between the two A-phase contacts (13) and the distance between the two B-phase contacts (14) are both larger than the width of the A-phase contacts (13) or the width of the B-phase contacts (14), and the width of the contact area between the conductive elastic sheet (15) and the A-phase contacts (13) is equal to the width of the A-phase contacts (13).
6. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the sliding distance of the second sliding rod (19) in the sliding hole (18) is smaller than the distance between the left end of the second sliding rod (19) and the left side of the shell (1), and the distance between the right side of the shell (1) and the right end of the first sliding rod (12) is larger than the width size of the A-phase contact (13).
7. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the bottom of the compression knob (20) is attached to the surface of the second sliding rod (19).
8. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: the distance between the two reset baffles (21) and the corresponding support (16) is the same, and the distance between the reset baffles (21) and the support (16) is equal to the width of the A-phase contact (13).
9. The electric hoist limiting device with the plurality of detection structures according to claim 1, characterized in that: one side of the return spring (22) is fixedly installed on the support (16), and the other side of the return spring (22) is attached to the return baffle (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110957370.4A CN113697704B (en) | 2021-08-20 | 2021-08-20 | Electric hoist limiting device with multiple detection structures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110957370.4A CN113697704B (en) | 2021-08-20 | 2021-08-20 | Electric hoist limiting device with multiple detection structures |
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| Publication Number | Publication Date |
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| CN113697704A true CN113697704A (en) | 2021-11-26 |
| CN113697704B CN113697704B (en) | 2023-03-14 |
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| CN210505362U (en) * | 2019-09-20 | 2020-05-12 | 阳春新钢铁有限责任公司 | Automatic power-off protection device of hoisting electric hoist |
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2021
- 2021-08-20 CN CN202110957370.4A patent/CN113697704B/en active Active
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|---|---|---|---|---|
| CN2439434Y (en) * | 2000-09-07 | 2001-07-18 | 徐国际 | Hammer type single phase cutting-off limiting means |
| CN204474228U (en) * | 2015-02-27 | 2015-07-15 | 新兴铸管股份有限公司 | Hoist ceiling crane inhibiting device |
| CN206751256U (en) * | 2017-04-09 | 2017-12-15 | 白伟华 | Spacing and preventing colliding with top rushes bottom stopping means above and below electric block |
| KR101917961B1 (en) * | 2017-09-26 | 2018-11-13 | (주)타마스 | Electronic Brake System with Ball Screw |
| CN210505362U (en) * | 2019-09-20 | 2020-05-12 | 阳春新钢铁有限责任公司 | Automatic power-off protection device of hoisting electric hoist |
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| CN113697704B (en) | 2023-03-14 |
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