Anti-top-rushing limiting device and crane
By designing an anti-collision limit device, which combines a pin plate, screw assembly, and limit switch, the problem that existing limit devices cannot adjust the height is solved, realizing the anti-collision function of the crane and improving the reliability and convenience of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-04-10
AI Technical Summary
Existing counterweight and pressure plate height limiting devices cannot adjust the height, making adjustment difficult and prone to swaying, which affects their reliability and convenience in lifting devices.
An anti-collision limiting device is designed, including a pin plate, a screw assembly, a fixed plate, a movable plate, a pin assembly, and a limit switch. The adjustableness and stability of the movable plate are achieved through the connection mechanism between the pin plate and the fixed plate and the limiting mechanism. The anti-collision function is achieved by the contact between the support part and the trigger rod of the limit switch.
This technology enables the crane to accurately trigger limit switches during its ascent, preventing overshoot accidents and improving the reliability and convenience of the device.
Smart Images
Figure CN224105436U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of limiting device, especially a kind of anti-bumping limiting device and crane. BACKGROUND
[0002] The limiting device for electric hoist and other lifting devices in prior art is generally limit switch, its structure is that two trigger rods connected with external circuit are arranged in limiting body.When object contacts and presses down pressure rod, pressure rod presses down movable contact, the contact of movable contact is disconnected, and short circuit is formed.The existing limiting device is mostly heavy hammer type and pressing plate type height limiting device.
[0003] The existing heavy hammer type and pressing plate type height limiting device has some deficiencies, such as unable to adjust height, prone to problems such as swing, adjustment difficulty, which limits its reliability and convenience in practical application. UTILITY MODEL CONTENTS
[0004] Therefore, the utility model wants to solve the technical problem in prior art that height cannot be adjusted, prone to problems such as swing and adjustment difficulty, so as to provide a kind of anti-bumping limiting device and crane.
[0005] To solve the above technical problems, the utility model provides a kind of anti-bumping limiting device, including:
[0006] Connecting mechanism, it includes: pin shaft plate, screw assembly and fixed plate, the pin shaft plate is equipped with first waist type hole, the screw assembly passes through first waist type hole and is used for locking pin shaft plate and fixed plate;
[0007] Limiting mechanism, it includes: movable plate, pin shaft assembly and limit switch, the movable plate extends support portion along first direction, the movable plate is equipped with second waist type hole along first direction, one end of pin shaft assembly is fixedly connected to fixed plate and the other end passes through second waist type hole and is dampenedly connected to fixed plate, the limit switch is installed on fixed plate, and the support portion is spaced apart from the limit switch along the first direction.
[0008] In an embodiment of the utility model, the movable plate includes activity portion, first limiting portion and second limiting portion connected in sequence, and the support portion extends from the first limiting portion along the first direction to the trigger rod close to the limit switch.
[0009] In an embodiment of the utility model, it further includes support frame, and the support frame and pin shaft plate are connected through fixed shaft.
[0010] In an embodiment of the utility model, the support frame is provided with guide wheel, the guide wheel is equipped with wheel groove, the wheel groove is provided with rope, and the rope passes through first limiting portion and second limiting portion.
[0011] In one embodiment of the utility model, the first limiting part and the second limiting part are respectively provided with a first avoiding slot and a second avoiding slot which are adapted to the rope body, and the first avoiding slot and the second avoiding slot extend along the same direction and have opposite opening directions.
[0012] In one embodiment of the utility model, the fixed plate is provided with a plurality of first through holes along the first direction, and the screw assembly passes through the first waist-shaped hole and the first through hole to lock the pin shaft plate and the fixed plate.
[0013] In one embodiment of the utility model, the fixed plate is provided with a second through hole, and the pin shaft assembly passes through the second waist-shaped hole and the second through hole to dampen the connection between the movable plate and the fixed plate.
[0014] In one embodiment of the utility model, the pin shaft assembly comprises a pin shaft, a pulley and a shaft sleeve, the pin shaft passes through the pin shaft and is fixedly connected to the second through hole, the pulley movably sheaths the pin shaft, and the shaft sleeve abuts against the fixed plate and sheaths the pulley.
[0015] In one embodiment of the utility model, the first waist-shaped hole and the second waist-shaped hole are both arranged along the first direction.
[0016] The utility model discloses still one kind of crane, including the anti-punching top limiting device of above.
[0017] The above technical scheme of the utility model has the following advantages compared with prior art:
[0018] The anti-punching top limiting device disclosed by the utility model, in the process of ascending, the movable plate will move with the abutment of the associated components, so that the support part of the movable plate gradually approaches the trigger rod of the limit switch. When the support part contacts the trigger rod and reaches a certain trigger condition, the limit switch is triggered, and the control equipment stops the ascending action, thereby realizing the function of anti-punching top. When the lower part of the moving plate is subjected to the force of the lower device, the moving plate moves upward, pushes the trigger rod on the limit switch to move upward, and when reaching a certain position, the limit switch is triggered, so that the lifting motor is de-energized to stop lifting, preventing the accident of punching top. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to make the content of the utility model more easily understood clearly, the utility model is further explained in detail below according to the specific embodiments of the utility model and in combination with the drawings, wherein
[0020] Figure 1 is the structure diagram of the limiting device of the utility model;
[0021] Figure 2 is the sectional view of the limiting device of the utility model;
[0022] Figure 3 is the utility model Figure 2 is the enlarged view of A in the utility model
[0023] Figure 4 is the structural schematic diagram of the utility model movable plate
[0024] Figure 5 is the structural schematic diagram of the utility model support frame
[0025] Figure 6 is the structural schematic diagram of the utility model fixed plate
[0026] The description of the drawing mark of the utility model is as follows: 1, pin shaft plate;2, support frame;3, fixed shaft;4, first waist type hole;5, first through hole;6, fixed plate;7, pin shaft;8, pulley;9, shaft sleeve;10, movable part;11, first limiting part;12, second limiting part;13, support part;14, first avoiding slot;15, second avoiding slot;16, second waist type hole;17, guide wheel;18, rope body. Specific implementation
[0027] The utility model will be further explained in combination with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.
[0028] Embodiment 1
[0029] Referring to Figures 1-6 The utility model discloses a kind of anti-bumping limit stop devices, comprising:
[0030] Connecting mechanism, it includes: pin shaft plate 1, screw assembly and fixed plate 6, the pin shaft plate 1 is equipped with first waist type hole 4, the screw assembly passes through first waist type hole 4 and is used to lock pin shaft plate 1 and fixed plate 6;
[0031] Limiting mechanism, it includes: movable plate, pin shaft 7 assembly and limit switch, the movable plate has support part 13 along first direction extension, the movable plate is equipped with second waist type hole 16 along first direction, one end of pin shaft 7 assembly is fixedly connected to fixed plate 6 and the other end passes through second waist type hole 16 and is connected to fixed plate 6 with damping, the limit switch is installed in fixed plate 6, the support part 13 and limit switch are spaced apart along first direction.
[0032] The utility model discloses a kind of anti-collision limit device, pin shaft plate 1 is connected with fixed plate 6 initially by screw assembly, according to actual installation demand, the position of fixed plate 6 relative to pin shaft plate 1 is adjusted by first waist hole 4, pin shaft plate 1 and fixed plate 6 are firmly locked by screw assembly.Activity plate is installed on pin shaft 7 assembly by second waist hole 16, since pin shaft 7 assembly and fixed plate 6 damping connection, activity plate can be in the length range of second waist hole 16 relative to fixed plate 6 activity.Limit switch is installed on fixed plate 6, so that support part 13 and limit switch are arranged at a certain distance along first direction.In the process of ascending, when crane ascends to the specific position close to top, activity plate will move with the abutment of associated component, so that the support part 13 of activity plate gradually approaches the trigger lever of limit switch.When support part 13 and trigger lever contact and reach certain trigger condition, limit switch is triggered, control equipment stops ascending action, to realize the function of anti-collision.When the lower part of moving plate is subjected to the force of lower device, moving plate moves upwards, and pushes the trigger lever on limit switch to move upwards, and when reaching certain position, limit switch is triggered, so that hoisting motor is de-energized and stops hoisting, to prevent collision accident.
[0033] Referring to Figure 4 As shown, the activity plate includes activity part 10, first limit part 11 and second limit part 12 connected in sequence, and the support part 13 extends from the first limit part 11 to the trigger lever of the limit switch along the first direction. The first limit part 11 and the second limit part 12 are used for limiting the rope body 18.
[0034] Referring to Figure 5 As shown, the utility model also includes support frame 2, and the support frame 2 and the pin shaft plate 1 are connected through fixed shaft 3. The support member is connected with the device in the support frame 2 through the fixed shaft 3, such as a wire rope hoist.
[0035] Referring to Figure 5 As shown, the support frame 2 is provided with guide wheel 17, the guide wheel 17 is provided with wheel groove, the rope body 18 is arranged around the wheel groove, and the rope body 18 passes through the first limit part 11 and the second limit part 12. The rope body 18 is pulled upwards as the hoisting mechanism drives the lifting hook to ascend. In the process of ascending, the rope body 18 moves along the wheel groove of the guide wheel 17, and the guide wheel 17 changes the movement direction of the rope body 18 and reduces the friction, so that the rope body 18 can move more smoothly.
[0036] Referring to Figure 4As shown, the first limiting part 11 and the second limiting part 12 are respectively provided with a first clearance groove 14 and a second clearance groove 15 adapted to the rope body 18. The first limiting part 11 and the second limiting part 12 are connected by a bending part. The first clearance groove 14 and the second clearance groove 15 extend in the same direction but have opposite opening directions. The wire rope is threaded in the upper and lower U-shaped grooves of the moving plate. The two grooves have opposite directions, which provides a certain swing space while preventing the wire rope from detaching.
[0037] Reference Figure 2 , 6 As shown, the fixing plate 6 has multiple first through holes 5 along a first direction. The screw assembly passes through the first oblong hole 4 and the first through holes 5 to lock the pin plate 1 and the fixing plate 6. The pin plate 1 and the fixing plate 6 are initially positioned according to design requirements. The screws of the screw assembly are passed through the first oblong hole 4 on the pin plate 1 and the corresponding first through holes 5 on the fixing plate 6. At this time, the nuts are not tightened, allowing the pin plate 1 and the fixing plate 6 to be in a relatively movable state. The position of the pin plate 1 relative to the fixing plate 6 is adjusted according to actual installation requirements or operating conditions of the equipment. In this embodiment, the first direction is the height direction.
[0038] Reference Figure 3 As shown, the fixed plate 6 has a second through hole, and the pin 7 assembly passes through the second oblong hole 16 and the second through hole to dampen the connection between the movable plate and the fixed plate 6. The second through hole on the fixed plate 6 is a circular hole, and its position corresponds to the second oblong hole 16 on the movable plate so that the pin 7 assembly can pass through smoothly. The second oblong hole 16 on the movable plate is set along the first direction, and its length direction determines the range of motion of the movable plate relative to the fixed plate 6. In order to achieve a damped connection, a damping structure, such as a damping sleeve or damping pad, is set between the pin 7 and the second through hole of the fixed plate 6, or between the pulley 8 and related components. These damping structures can generate damping force through friction, etc., so that the movable plate has a certain resistance when moving relative to the fixed plate 6, ensuring that after the movable plate is displaced by external force, it will not easily move back or shake due to its own inertia or slight vibration, ensuring that the support part 13 can accurately trigger the limit switch.
[0039] Reference Figure 3As shown, the pin shaft 7 assembly includes: a pin shaft 7, a pulley 8 and a shaft sleeve 9, the pin shaft 7 passes through the pin shaft 7 and is fixedly connected to the second through hole, the pulley 8 movably sheaths the pin shaft 7, and the shaft sleeve 9 abuts against the fixed plate 6 and sheaths the pulley 8. During the movement of the movable plate, the pulley 8 rotates around the pin shaft 7 along with the movement of the movable plate, and the rotation of the pulley 8 effectively reduces the abrasion between the movable plate and the fixed plate 6, so that the movement of the movable plate is more smooth. At the same time, the shaft sleeve 9 plays a protective and stabilizing role in this process. It protects the surface of the fixed plate 6 from being abraded by the pulley 8, and maintains the position of the pulley 8 stable, preventing the pulley 8 from deviating during rotation and the like. The end of the shaft sleeve 9 is provided with an annular part, and the inner side end face of the annular part abuts against both sides of the first waist-shaped hole of the fixed plate 6.
[0040] Referring to Figure 1 As shown, the first waist-shaped hole 4 and the second waist-shaped hole 16 are both arranged along the first direction. The consistency of the directions of the two helps to ensure the coherence and stability of the movement and adjustment of the device in the first direction, and thus better realizes the function of preventing the top collision.
[0041] Embodiment 2
[0042] The embodiment discloses a crane comprising the anti-collision limiting device as described in embodiment 1.
[0043] The crane disclosed by the embodiment mainly comprises a hoisting mechanism, a running mechanism, an amplitude changing mechanism, a slewing mechanism and a control system. The hoisting mechanism is the core component for realizing the vertical lifting of materials, the running mechanism enables the crane to move on a track or the ground, the amplitude changing mechanism can change the working amplitude of a hook, the slewing mechanism enables the crane to rotate around a vertical axis, and the control system is responsible for accurately controlling and coordinating the operation of each mechanism.
[0044] Obviously, the above embodiments are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.
Claims
1. A bump stop limiting device, characterized by, The utility model relates to a kind of anti-punching limit position devices, including: Connecting mechanism, it includes: pin shaft plate, screw assembly and fixed plate, the pin shaft plate is equipped with first waist type hole, the screw assembly passes through first waist type hole and is used to lock pin shaft plate and fixed plate; Limiting mechanism, it includes: movable plate, pin shaft assembly and limit switch, the movable plate extends support portion along first direction, the movable plate is equipped with second waist type hole along first direction, one end of pin shaft assembly is fixedly connected to fixed plate and the other end passes through second waist type hole and is damply connected to fixed plate, the limit switch is installed on fixed plate, the support portion is spaced apart from limit switch along first direction.
2. The anti-bump limiting device according to claim 1, characterized in that: The movable plate includes activity portion, first limiting portion and second limiting portion connected in sequence, and the support portion extends from the first limiting portion along the first direction to approach the trigger lever of the limit switch.
3. A device according to claim 2, wherein: Further comprising support frame, the support frame and pin shaft plate are connected by fixed shaft.
4. The anti-bump limiting device according to claim 3, characterized in that: The support frame is provided with guide wheel, the guide wheel is equipped with wheel groove, the rope is wound around the wheel groove, and the rope passes through the first limiting portion and the second limiting portion.
5. The anti-bump limiting device according to claim 3, characterized in that: The first limiting portion and the second limiting portion are respectively equipped with first avoiding slot and second avoiding slot adapted to the rope, and the first avoiding slot and the second avoiding slot extend along the same direction and are oppositely opened.
6. The anti-bump limiting device according to claim 1, characterized in that: The fixed plate is equipped with a plurality of first through holes along the first direction, and the screw assembly passes through the first waist type hole and the first through hole to lock the pin shaft plate and the fixed plate.
7. The anti-bump limiting device according to claim 1, characterized in that: The fixed plate is equipped with second through hole, and the pin shaft assembly passes through the second waist type hole and the second through hole to damply connect the movable plate and the fixed plate.
8. The anti-bump limiting device according to claim 1, characterized in that: The pin shaft assembly includes pin shaft, pulley and shaft sleeve, the pin shaft passes through the pin shaft and is fixedly connected to the second through hole, the pulley is movably sleeved on the pin shaft, and the shaft sleeve is abutted to the fixed plate and sleeved on the pulley.
9. The anti-bump limiting device according to claim 1, characterized in that: The first waist type hole and the second waist type hole are both arranged along the first direction.
10. A crane, characterized in that Including the anti-punching limit position device of any one of claims 1-9.