CN113772551A - Hook top punching detection device for floating crane - Google Patents
Hook top punching detection device for floating crane Download PDFInfo
- Publication number
- CN113772551A CN113772551A CN202111138199.0A CN202111138199A CN113772551A CN 113772551 A CN113772551 A CN 113772551A CN 202111138199 A CN202111138199 A CN 202111138199A CN 113772551 A CN113772551 A CN 113772551A
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- weight
- heavy hammer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/50—Applications of limit circuits or of limit-switch arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/28—Counterweights, i.e. additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system, e.g. of pistons attached to an engine crankshaft; Attaching or mounting same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention provides a lifting hook top punching detection device for a floating crane, which comprises: the lifting mechanism is used for driving a lifting hook to move upwards, the supporting mechanism is used for supporting the heavy hammer limit switch, the heavy hammer limit switch and the heavy hammer assembly are connected through a connecting steel wire rope, the lifting hook is not in assembly contact with the heavy hammer in a first state, the rocker arm of the heavy hammer limit switch is located at a first station, the lifting hook rises to a preset position in a second state, the heavy hammer assembly is supported at the upper end of the lifting hook, and the rocker arm of the heavy hammer limit switch is located at a second station and sends a signal for limiting the lifting hook to continuously rise. The invention can always keep the connection steel wire rope in a tightened state, prevent the assembly of the heavy hammer from being brought up to send out detection signals by mistake and realize the top impact detection of the rising of the movable steel wire rope. The design of a plurality of weight plates can adjust the whole gravity center of the heavy hammer assembly, so that the gravity center of the heavy hammer assembly is on the axis of the heavy hammer, and the jamming is reduced during the heavy hammer assembly.
Description
Technical Field
The invention relates to the field of crane design, in particular to a lifting hook top impacting detection device for a floating crane.
Background
In order to prevent the main lifting hook and the auxiliary lifting hook of the floating crane from colliding with the main structure of the head of the arm support in the upward moving process, detection signals need to be sent out to alarm when the main lifting hook and the auxiliary lifting hook rise to a certain height, so that the main lifting hook and the auxiliary lifting hook are prevented from continuing to rise, and the hoisting reliability of the floating crane is improved. The existing lifting hook has less top punching detection, and generally adopts a fixed touch head type, namely a longer structure welded at the upper end of the lifting hook and a limit point on a fixed structure extending out of a main arm fixed structure are triggered to send out a signal. However, the lifting state of the floating crane is greatly disturbed by the outside, the lifting hook can swing within a certain range, and if a conventional processing method is adopted, the fixed collision head cannot be accurately triggered.
Disclosure of Invention
In accordance with the above-mentioned technical problem, a hook impact detection device for a floating crane is provided. The technical means adopted by the invention are as follows:
a hook thrust top detection device for a floating crane, comprising: the lifting mechanism is used for driving a lifting hook to move upwards, the supporting mechanism is used for supporting the heavy hammer limit switch, the heavy hammer limit switch and the heavy hammer assembly are connected through a connecting steel wire rope, the lifting hook is not in assembly contact with the heavy hammer in a first state, the rocker arm of the heavy hammer limit switch is located at a first station, the lifting hook rises to a preset position in a second state, the heavy hammer assembly is supported at the upper end of the lifting hook, and the rocker arm of the heavy hammer limit switch is located at a second station and sends a signal for limiting the lifting hook to continuously rise.
Furthermore, the lifting mechanism comprises a pulley and a lifting steel wire rope connected with the pulley, and the bottom end of the lifting steel wire rope is connected with the lifting hook.
Furthermore, the supporting mechanism comprises a pulley support, a fixed support and a suspension support, the pulley support is hinged to the pulley, the fixed support is connected with the pulley support, the suspension support is hinged to the fixed support through a pin shaft, and the heavy hammer limit switch is arranged on the suspension support.
Furthermore, the fixed support adopts a double-lug plate structure welded by a plate, and a double-lug plate at the lower end is connected with an upper lug plate of the suspension support; the upper end of the fixed support is arc-shaped and is welded with the single-side ear plate of the pulley support.
Furthermore, the suspension support is in a right-angle bending plate structure, a heavy hammer limit switch is arranged above the lower bending plate, and the heavy hammer limit switch and the lower bending plate are fixed through bolts.
Furthermore, the weight assembly comprises a weight body, a pressing plate and a self-limiting mechanism, the weight body and the self-limiting mechanism are arranged on the pressing plate, a lifting screw is arranged above the weight body, a rocker arm at the front end of the weight limiting switch is connected with the lifting screw through a connecting steel wire rope, a central opening is formed in the self-limiting mechanism and used for allowing a lifting steel wire rope of the lifting mechanism to pass through, and the self-limiting mechanism is used for preventing the weight limiting switch and the weight assembly from mistakenly sending detection signals under the first state.
Furthermore, the weight assembly further comprises a weight plate capable of adjusting the weight, the weight body is arranged in the center of the pressing plate, the weight plate and the self-limiting mechanism are respectively arranged on two sides of the weight body, and the weight plate is used for adjusting the overall gravity center of the weight assembly to enable the gravity center to be on the axis of the weight.
Furthermore, the self-limiting mechanism comprises a rotating mechanism, and the rotating mechanism is used for rotating after the lifting steel wire rope touches the self-limiting mechanism, and unloading the thrust of the lifting steel wire rope to the self-limiting mechanism.
Further, the self-limiting mechanism comprises a connecting plate, a carrier roller, a shaft and a self-lubricating bearing, four connecting plates with certain distances are welded above and below the right side of the pressing plate respectively, and a through hole is formed in the middle of each connecting plate;
two first carrier rollers are arranged below the right side of the pressing plate and are respectively positioned between two connecting plates in the same direction, a first shaft and the first carrier rollers are sequentially sleeved from left to right, self-lubricating bearings are arranged on two sides of each first carrier roller, and two ends of each shaft are fixed by nuts;
two second carrier rollers are installed above the right side of the pressing plate and are respectively located between two connecting plates in the same direction, a second shaft and the second carrier rollers are sequentially sleeved from left to right, self-lubricating bearings are arranged on two sides of each second carrier roller, and two ends of each shaft are fixed through nuts.
Aiming at the actual use working condition of the floating crane, the invention adopts a special structure of heavy hammer assembly with a carrier roller and a rocker arm of a heavy hammer detection switch tensioned by the self weight of the heavy hammer to enable a rocker arm to droop, and when a lifting hook rises, the rocker arm is triggered to lift the heavy hammer, so that a pull rope is in a non-straightening state, the rocker arm of the heavy hammer detection switch is promoted to lift a trigger signal, the effective safety distance between the lifting hook and an arm frame structure is ensured, and the lifting reliability of the lifting hook is ensured.
The invention has the following advantages:
1. and a lifting steel wire rope passes through a square space defined by two first carrier rollers below the right side of the pressing plate assembled by the heavy hammer and two second carrier rollers above the pressing plate. When the lifting steel wire rope moves up and down or is interfered by external factors such as wind and the like, if the lifting steel wire rope touches a carrier roller in heavy hammer assembly in the lifting process, the carrier roller can rotate around a shaft and always keeps the tension state of the connecting steel wire rope, the heavy hammer assembly is prevented from being brought to mistakenly send a detection signal, and the impact detection of the lifting steel wire rope is realized.
2. The design of a plurality of weight plates can adjust the whole gravity center of the heavy hammer assembly, so that the gravity center of the heavy hammer assembly is on the axis of the heavy hammer, the heavy hammer assembly is vertical and downward, the hoisting steel wire rope is ensured to pass through smoothly, and the jamming is reduced in the heavy hammer assembly.
3. The suspension support is hinged with the fixed support, the suspension support always keeps a vertical downward direction, and the relative horizontal position of the heavy hammer limit switch and the lifting steel wire rope is guaranteed to be unchanged, so that the heavy hammer assembly is prevented from being brought to mistakenly send a detection signal when large transverse force is applied.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic front view of a hook impact top detection device of a floating crane according to the present invention;
FIG. 2 is a schematic side view of a hook impact top detection device of the floating crane of the present invention;
FIG. 3 is a schematic front view of the assembly of the weight of the present invention;
FIG. 4 is a schematic top view of the weight assembly of the present invention.
In the figure: 1. the device comprises a fixed support, a 2-suspension support, a 3-weight limit switch, a 4-connection steel wire rope, a 5-weight assembly, a 6-lifting steel wire rope, a 7-pin shaft, a 8-pulley support, a 9-pulley, a 10-hook, a 5.1-weight body, a 5.2-lifting screw, a 5.3-pressing plate, a 5.4-connecting plate, a 5.5-self-lubricating bearing, a 5.6-first carrier roller, a 5.7-counterweight plate, a 5.8-first shaft, a 5.9-second carrier roller and a 5.10-second shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The invention aims to realize the alarm stop of the lifting hook rising to the preset position by adopting a special structure of heavy hammer assembly with a carrier roller and a hook-heavy hammer detection switch combined structure aiming at the actual use working condition of a floating crane, ensure the effective safety distance between the lifting hook and a boom structure and ensure the reliability of the mechanism operation. Specifically, as shown in fig. 1 and 2, the embodiment of the invention discloses a hook impact detection device for a floating crane, which is a impact detection device installed near a hoisting pulley of the floating crane and used for detecting whether a hook 10 reaches an upper limit. Preventing the hook 10 from rising all the way up to collide with the main structure. It includes: the lifting mechanism is used for driving a lifting hook 10 to move upwards, the supporting mechanism is used for supporting the heavy hammer limit switch 3, the heavy hammer limit switch 3 is connected with the heavy hammer assembly 5 through a connecting steel wire rope 4, the lifting hook 10 is not in contact with the heavy hammer assembly 5 in a first state, a rocker arm of the heavy hammer limit switch 3 is located at a first station, the lifting hook 10 rises to a preset position in a second state, the heavy hammer assembly 5 is supported by the upper end of the lifting hook 10, and the rocker arm of the heavy hammer limit switch 3 is located at a second station and sends a signal for limiting the lifting hook 10 to continue to rise.
The lifting mechanism comprises a pulley and a lifting steel wire rope 6 connected with the pulley, and the bottom end of the lifting steel wire rope 6 is connected with the lifting hook 10.
The supporting mechanism comprises a pulley support 8, a fixed support 1 and a suspension support 2, the pulley support 8 is hinged to a pulley 9, the fixed support 1 is connected with the pulley support 8, the suspension support 2 is hinged to the fixed support 1 through a pin shaft 7, and the heavy hammer limit switch 3 is arranged on the suspension support 2.
The fixed support 1 is of a double-lug plate structure welded by plates, and a double-lug plate at the lower end is connected with an upper lug plate of the suspension support 2; the upper end of the fixed support 1 is arc-shaped and is welded with the single-side ear plate of the pulley support 8.
The suspension support 2 is of a right-angle bending plate structure, the upper portion of the suspension support is a semicircular lug plate, the middle of the semicircular lug plate is a through hole, the middle of the double lug plate inserted into the fixed support 1 is connected through a pin shaft 7, a heavy hammer limit switch 3 is placed above the lower bending plate, and the suspension support and the heavy hammer limit switch are fixed through bolts.
As shown in fig. 3 and 4, the weight assembly 5 includes a weight body 5.1, a pressing plate 5.3 and a self-limiting mechanism, the weight body 5.1 and the self-limiting mechanism are both disposed on the pressing plate 5.3, an eyebolt 5.2 screwed into the weight body 5.1 is disposed above the weight body 5.1, a rocker arm at the front end of the weight limit switch 3 is connected with the eyebolt 5.2 by a connecting steel wire rope 4, the self-limiting mechanism is provided with a central opening for a lifting steel wire rope 6 of a lifting mechanism to pass through, and the self-limiting mechanism is used for preventing the weight limit switch 3 and the weight assembly 5 from mistakenly sending detection signals in the first state.
The weight assembly 5 further comprises a weight plate 5.7 capable of adjusting weight, the weight body 5.1 is arranged in the center of the pressing plate 5.3, the weight plate 5.7 and the self-limiting mechanism are respectively arranged on two sides of the weight body 5.1, specifically, the pressing plate 5.3 is arranged on the lower portion of the weight body 5.1, the plurality of weight plates 5.7 are arranged above the left side of the pressing plate 5.3 through bolts, and the weight plate 5.7 is used for adjusting the whole gravity center of the weight assembly 5 to enable the gravity center to be on the axis of the weight.
The self-limiting mechanism comprises a rotating mechanism, and the rotating mechanism is used for rotating after the lifting steel wire rope 6 touches the self-limiting mechanism, and unloading the thrust of the lifting steel wire rope 6 to the self-limiting mechanism.
The self-limiting mechanism comprises a connecting plate 5.4, a carrier roller, a shaft and a self-lubricating bearing 5.5, four connecting plates 5.4 with certain distances are welded above and below the right side of the pressing plate 5.3 respectively, and a through hole is formed in the middle of each connecting plate 5.4;
two first carrier rollers 5.6 are arranged below the right side of the pressure plate 5.3, are respectively positioned between two connecting plates 5.4 in the same direction, are sequentially sleeved with a first shaft 5.8 and the first carrier rollers 5.6 from left to right, two sides of each first carrier roller 5.6 are provided with self-lubricating bearings 5.5, and two ends of each shaft are fixed by nuts;
two second carrier rollers 5.9 are installed above the right side of the pressing plate 5.3 and are respectively located between two connecting plates 5.4 in the same direction, a second shaft 5.10 and the second carrier rollers 5.9 are sequentially sleeved from left to right, self-lubricating bearings 5.5 are arranged on two sides of each second carrier roller 5.9, two ends of each second carrier roller are fixed through nuts, and two first carrier rollers 5.6 below the right side of the pressing plate 5.3 of the heavy hammer assembly 5 and two second carrier rollers 5.9 above the pressing plate are enclosed to form a square space.
The embodiment of the invention is as follows:
in the normal hoisting process, the hoisting steel wire rope 6 is driven to lift the hook 10 along with the rotation of the pulley 9, and the hoisting steel wire rope 6 can pass through a square space surrounded by two first carrier rollers 5.6 below the right side of the pressing plate 5.3 of the heavy hammer assembly 5 and two second carrier rollers 5.9 above the pressing plate. When the lifting steel wire rope 6 moves up and down or is disturbed by wind and other external factors, if the lifting steel wire rope touches the carrier roller in the heavy hammer assembly 5 in the lifting process, the carrier roller can rotate around the shaft, and the rocker arm of the heavy hammer limit switch 3 sags without triggering a detection signal because the heavy hammer assembly 5 is always in a state of being connected with the steel wire rope 4 due to the self weight of the heavy hammer assembly 5.
Under different lifting angles, the fixed support 1 with the suspension support 2 and the pulley support 8 welded together is hinged by a pin shaft 7, the suspension support 2 is always kept in a vertical and downward direction, and the relative horizontal position of the heavy hammer limit switch 3 and the lifting steel wire rope 6 is ensured to be unchanged, so that the heavy hammer assembly 5 is prevented from being brought into false triggering of a detection signal when large transverse force is applied.
A plurality of weight plates 5.7 are arranged above the left side of the pressing plate 5.3, the whole gravity center of the heavy hammer assembly 5 can be adjusted, the gravity center of the heavy hammer assembly 5 is located on the axis of the heavy hammer 5.1, the heavy hammer assembly 5 is vertical and downward, and the lifting steel wire rope 6 is ensured to smoothly pass through the heavy hammer assembly 5 to reduce jamming. The first state, i.e. the hook 10 is in operation, but has not yet reached the upper limit.
The second state is specifically: when the pulley 9 rotates to drive the lifting steel wire rope 6 to lift the hook 10 to the upper limit, the upper end of the hook 10 supports the heavy hammer assembly 5, so that the connecting steel wire rope 4 connected with the heavy hammer limit switch 3 at the upper end of the heavy hammer assembly 5 is in a loose state, a rocker arm on the heavy hammer limit switch 3 is lifted, and a signal is sent to prevent the hook 10 from continuously rising.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a lifting hook dashes and pushes up detection device for floating crane, its characterized in that, includes hoist mechanism, supporting mechanism, weight limit switch and weight assembly, hoist mechanism is used for driving the lifting hook rising movement, supporting mechanism is used for supporting weight limit switch, weight limit switch and weight assembly link to each other through connecting wire rope, and under the first state, the lifting hook does not contact with the weight assembly, weight limit switch's rocking arm is in first station, and under the second state, the lifting hook rises to preset position, and the weight assembly is held up to the lifting hook upper end, weight limit switch's rocking arm is in the second station, sends the signal that the restriction lifting hook continues to rise.
2. The device as claimed in claim 1, wherein the lifting mechanism comprises a pulley and a lifting wire connected to the pulley, and the bottom end of the lifting wire is connected to the lifting hook.
3. The device as claimed in claim 2, wherein the supporting mechanism comprises a pulley support, a fixed support and a suspension support, the pulley support is hinged to the pulley, the fixed support is connected to the pulley support, the suspension support is hinged to the fixed support through a pin, and the weight limit switch is disposed on the suspension support.
4. The lifting hook top-punching detection device for the floating crane according to claim 3, wherein the fixed support is in a plate-welded double-lug-plate structure, and the lower double-lug-plate is connected with the upper lug plate of the suspension support; the upper end of the fixed support is arc-shaped and is welded with the single-side ear plate of the pulley support.
5. The device as claimed in claim 3, wherein the suspension support is a right-angled bent plate, and the weight limit switch is disposed above the lower bent plate and fixed by bolts.
6. The device as claimed in claim 1, wherein the weight assembly comprises a weight body, a pressing plate and a self-limiting mechanism, the weight body and the self-limiting mechanism are both disposed on the pressing plate, an eye screw is disposed above the weight body, the rocker arm at the front end of the weight limit switch is connected to the eye screw by a connecting wire rope, the self-limiting mechanism is provided with a central opening for passing a lifting wire rope of the lifting mechanism, and the self-limiting mechanism is used for preventing the weight limit switch and the weight assembly from mistakenly sending detection signals in the first state.
7. The device as claimed in claim 6, wherein the weight assembly further comprises a weight plate for adjusting the weight, the weight body is disposed at the center of the pressing plate, the weight plate and the self-limiting mechanism are disposed at two sides of the weight body, and the weight plate is used to adjust the overall gravity center of the weight assembly so that the gravity center is on the axis of the weight.
8. The lifting hook jacking detection device for the floating crane according to claim 6, wherein the self-limiting mechanism comprises a rotating mechanism, and the rotating mechanism is used for rotating after a lifting steel wire rope touches the self-limiting mechanism, so as to unload the thrust of the lifting steel wire rope on the self-limiting mechanism.
9. The lifting hook impact top detection device for the floating crane according to claim 6 or 8, wherein the self-limiting mechanism comprises a connecting plate, a carrier roller, a shaft and a self-lubricating bearing, four connecting plates with a certain distance are respectively welded above and below the right side of the pressure plate, and a through hole is formed in the middle of each connecting plate;
two first carrier rollers are arranged below the right side of the pressing plate and are respectively positioned between two connecting plates in the same direction, a first shaft and the first carrier rollers are sequentially sleeved from left to right, self-lubricating bearings are arranged on two sides of each first carrier roller, and two ends of each shaft are fixed by nuts;
two second carrier rollers are installed above the right side of the pressing plate and are respectively located between two connecting plates in the same direction, a second shaft and the second carrier rollers are sequentially sleeved from left to right, self-lubricating bearings are arranged on two sides of each second carrier roller, and two ends of each shaft are fixed through nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111138199.0A CN113772551A (en) | 2021-09-27 | 2021-09-27 | Hook top punching detection device for floating crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111138199.0A CN113772551A (en) | 2021-09-27 | 2021-09-27 | Hook top punching detection device for floating crane |
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| Publication Number | Publication Date |
|---|---|
| CN113772551A true CN113772551A (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111138199.0A Pending CN113772551A (en) | 2021-09-27 | 2021-09-27 | Hook top punching detection device for floating crane |
Country Status (1)
| Country | Link |
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| CN (1) | CN113772551A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462101A (en) * | 2023-05-10 | 2023-07-21 | 江苏省特种设备安全监督检验研究院 | Height limiter with safety protection function for lifter |
| CN116835432A (en) * | 2023-09-01 | 2023-10-03 | 天津津岛船务有限公司 | Lifting hook of marine crane and use method thereof |
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| CN202346628U (en) * | 2011-11-18 | 2012-07-25 | 武汉船用机械有限责任公司 | Heavy punch type lifting limiter |
| CN102910537A (en) * | 2012-09-27 | 2013-02-06 | 太原重工股份有限公司 | Counterweight limit switch device of hoisting mechanism |
| CN203382401U (en) * | 2013-05-23 | 2014-01-08 | 云南昆钢重型装备制造集团有限公司 | Limiting device for lifting of lifting hook of crane |
| CN203428773U (en) * | 2013-07-30 | 2014-02-12 | 纽科伦（新乡）起重机有限公司 | Counter weight type lifting height limiting device and crane |
| CN209337999U (en) * | 2018-12-25 | 2019-09-03 | 成都畅越机械工程有限公司 | A kind of guide wheel heavy hammer type lifting limiter |
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2021
- 2021-09-27 CN CN202111138199.0A patent/CN113772551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202346628U (en) * | 2011-11-18 | 2012-07-25 | 武汉船用机械有限责任公司 | Heavy punch type lifting limiter |
| CN102910537A (en) * | 2012-09-27 | 2013-02-06 | 太原重工股份有限公司 | Counterweight limit switch device of hoisting mechanism |
| CN203382401U (en) * | 2013-05-23 | 2014-01-08 | 云南昆钢重型装备制造集团有限公司 | Limiting device for lifting of lifting hook of crane |
| CN203428773U (en) * | 2013-07-30 | 2014-02-12 | 纽科伦（新乡）起重机有限公司 | Counter weight type lifting height limiting device and crane |
| CN209337999U (en) * | 2018-12-25 | 2019-09-03 | 成都畅越机械工程有限公司 | A kind of guide wheel heavy hammer type lifting limiter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116462101A (en) * | 2023-05-10 | 2023-07-21 | 江苏省特种设备安全监督检验研究院 | Height limiter with safety protection function for lifter |
| CN116462101B (en) * | 2023-05-10 | 2024-01-05 | 江苏省特种设备安全监督检验研究院 | Height limiter with safety protection function for lifter |
| CN116835432A (en) * | 2023-09-01 | 2023-10-03 | 天津津岛船务有限公司 | Lifting hook of marine crane and use method thereof |
| CN116835432B (en) * | 2023-09-01 | 2023-12-22 | 天津津岛船务有限公司 | Lifting hook of marine crane and use method thereof |
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Application publication date: 20211210 |
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| RJ01 | Rejection of invention patent application after publication |