Novel elevator

Abstract

A novel elevator comprises an electric winch, a supporting arm, a lifting hook, a balancing weight, a pulley, a steel wire rope, a weight detection circuit and a ground clearance detection circuit. The pulley is rotatably mounted in front of the supporting arm, the electric winch is mounted behind the supporting arm, the steel wire rope is mounted on a winding drum of the electric winch, and the front end of the steel wire rope is positioned on the pulley; supporting columns are installed at the lower ends of the supporting arms and provided with movable rods, and wheels are arranged below the movable rods. A limiting plate is installed on the side of the movable rod and provided with a threaded rod. A limiting rod and a plurality of balancing weights are mounted at the rear end of the supporting arm; the upper end of a weight detection circuit matched pull pressure sensor and the front end of the steel wire rope are mounted together, and the lower end of the pull pressure sensor and the lifting hook are mounted together; and the weight detection circuit and the off-ground detection circuit are arranged in the electric cabinet. According to the device, stations can be conveniently transferred, and due to the fact that displacement of the whole device during working can be prevented, a worker can be prompted in time to perform targeted disposal when an over-weight threshold value occurs and the rear end of the device is above the ground.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, in particular to a new type of hoist. Background Art

[0002] The general structure of a suspended hoist includes a winch, a support frame, an extension arm, etc. It is widely used in construction or production due to its advantages of ease of use and low cost (for example, it is installed on the top of a dam or a building to lift maintenance tools or parts located at the bottom of the dam or building, or installed on the upper end of production equipment to lift raw materials located at the lower end, etc.).

[0003] Although the existing suspension equipment meets the actual needs to a certain extent, it also has some disadvantages due to structural limitations. Since it is installed in a fixed area for use, when the position of the work point needs to be moved at the corresponding workstation, or when the work is to be lifted in another work area, the staff needs to disassemble the equipment first, and use other equipment to transfer the relevant parts to other positions for assembly before use. The above method will bring inconvenience to the staff, and is not conducive to improving work efficiency accordingly, and the equipment as a whole cannot be used flexibly. Although there are also displaceable suspension equipment (suspension hoist) in the prior art, it has sliding wheels for the convenience of displacement. In this way, in actual application, if the ground in the corresponding area is too smooth, there is a probability that the equipment will move forward when working, which will have an adverse effect on the safe lifting work. In addition, the displaceable suspension equipment does not have a safety monitoring function. In this way, when the weight of the hoisted cargo is greater than the threshold, there is a probability that the rear side end of the frame will be tilted up. In severe cases, there is also a probability that the equipment will fall from a high place to the ground due to unstable center of gravity. In summary, it is particularly necessary to provide a hoist that can be easily moved, can operate safely and stably, and can promptly prompt the staff to take targeted measures when the weight of the hoisted cargo is too heavy or the rear end of the frame is tilted, thereby reducing the probability of safety accidents. Utility Model Content

[0004] In order to overcome the drawbacks of existing suspended equipment (suspension hoist) as described in the background due to structural limitations, the utility model provides a new type of hoist that can be easily moved to the corresponding working area for work under the joint action of relevant mechanisms, and can effectively prevent displacement during operation, and can promptly prompt the staff to take targeted measures when the weight of the hoisted cargo is too heavy or the rear end of the frame is tilted due to unstable center of gravity, thereby ensuring safe hoisting production as much as possible.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A new type of hoist, including an electric winch, a support arm, a hook, a counterweight, a pulley, and a wire rope, characterized in that it also has a weight detection circuit and a ground-lift detection circuit; the pulley is rotatably mounted on the front end of the support arm, and a reinforced wire rope is installed on the support arm; the electric winch is installed on the rear end of the support arm, and the rear end of the wire rope is installed on the drum of the electric winch, and the front end of the wire rope is led downward through the wheel groove of the pulley; connecting plates are respectively installed on the front and rear left and right sides of the lower end of the support arm, and each connecting plate is respectively installed with an internal thread support column; each support column The inner lower end is respectively threadedly installed with a movable rod, and the lower end of the movable rod is installed with a wheel; a limit plate is installed on the side of the movable rod, and a locking screw is installed on the limit plate; a limit rod is installed at the rear end of the support arm, and there are multiple counterweights, each of which has an opening, and multiple counterweights are movably sleeved on the outside of the limit rod through the opening; the weight detection circuit is equipped with a tension and pressure sensor, the upper end of the force surface of the tension and pressure sensor and the front end of the wire rope are installed together, and the lower end of the force surface of the tension and pressure sensor and the hook are installed together; the weight detection circuit and the ground detection circuit are installed in the electric control box.

[0007] Furthermore, an anti-slip contact plate is horizontally mounted on the lower end of the locking screw.

[0008] Furthermore, the weight detection circuit includes an electrically connected resistor, a transistor, and a buzzer, and is connected to a tension pressure sensor, the signal output end of the tension pressure sensor is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the second resistor and the base of the transistor, the collector of the transistor is connected to the negative power input end of the buzzer, the negative power input end of the tension pressure sensor is connected to the emitter of the transistor and the other end of the second resistor, and the positive power input end of the tension pressure sensor is connected to the positive power input end of the buzzer.

[0009] Furthermore, the ground lift detection circuit includes an electric push rod, a pressure sensor, a trigger sub-circuit, and a power switch. The cylinder of the electric push rod is vertically distributed and installed on the outside of the rear end support column. The upper end of the pressure sensor and the lower end of the push column of the electric push rod are installed together, and the trigger sub-circuit and the power switch are installed in the electric control box.

[0010] Furthermore, the trigger subcircuit includes an electrically connected resistor, a transistor, and a buzzer, and is connected to a pressure sensor, the signal output end of the pressure sensor is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the first transistor, the collector of the first transistor is connected to the base of the second transistor and one end of the second resistor, the other end of the second resistor is connected to the positive power input end of the buzzer, and the negative power input end of the pressure sensor is connected to the emitters of the two transistors.

[0011] Compared with the technology in the field, the utility model has the following beneficial effects: (1) Since the utility model has four universal wheels, it can be easily transferred from one working position to another without disassembly, and since it has a limit plate and a locking screw, it can prevent the overall displacement of the equipment during operation, which brings convenience to the user and correspondingly improves the work efficiency; (2) During operation, the ground detection circuit and the weight detection circuit can detect in real time whether the rear end of the equipment is off the ground and whether the cargo hoisted by the hook is too heavy. When the overweight threshold is reached and the rear end is highly off the ground, the worker can be promptly prompted to take targeted measures, thereby reducing the probability of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0015] Figure 1 , 2As shown in the figure, a new type of hoist includes an electric winch 1 (a finished product of a 3KW coaxial motor gear reducer), a support arm 2, a hook 3, a counterweight 4, a power module A1, a pulley 5, a wire rope 6, and also has a weight detection circuit 7 and a ground detection circuit 8; a support plate is rotatably installed on the left and right sides of the pulley 5, and the two support plates of the pulley 5 are respectively welded to the middle of the front lower end of the support arm 2, and two fixing rods 21 are vertically welded on the left and right sides of the front upper end of the support arm 2 at a distance from each other, and the upper ends of the two fixing rods 21 and the front upper end and rear upper end of the support arm 2 are connected by a The reinforcing steel wire rope 22 is fixedly connected together (to strengthen the strength of the support arm 1); the electric winch 1 is installed at the middle of the lower end of the support arm 2 by bolts, the rear end of the steel wire rope 6 is fixed on the drum of the electric winch 1, and the front end of the steel wire rope 6 is led downward through the wheel groove at the upper end of the pulley 5; a connecting plate 23 is welded to the left and right sides of the front and rear of the lower end of the support arm 2, and a hollow internal thread support column 9 is vertically welded to the outside of each connecting plate 23, and the rear outer lower ends of the two support columns 9 at the front end and the front outer ends of the two support columns 9 at the rear end are respectively welded to the support via a connecting rod 27. The lower middle end and the lower rear end of the arm (reinforcement function); a movable rod 24 is threadedly installed at the lower end of each support column 9 (the height of the movable rod in the support column can be adjusted to adjust the height of the entire device), and a universal wheel 28 is installed at the lower end of the movable rod 24; a limit plate 25 is horizontally welded to the rear side of the lower end of each movable rod 24, and the rear side of the limit plate 25 has an internal thread, and a manual locking screw 26 is vertically threaded into the internal thread of the limit plate 25; a limit rod is vertically welded at a distance between the left and right sides of the rear lower end of the support arm 2 28, there are multiple counterweights 4, each counterweight 4 has an opening in the middle, and the multiple counterweights 4 are movably sleeved on the outside of the two limit rods 28 from top to bottom through the opening; the weight detection circuit is equipped with a tension pressure sensor A3, the upper end of the force surface of the tension pressure sensor A3 and the front lower end of the wire rope 6 are fixedly installed together, and the lower end of the force surface of the tension pressure sensor A3 and the hook 3 are fixedly installed together through a section of connecting wire rope; the power module W1, the weight detection circuit 7, and the ground detection circuit 8 are installed on the circuit board in the electric control box 10, and the electric control box 10 is installed at the rear lower end of the support arm;

[0016] Figure 1 , 2As shown in , a contact plate 261 is horizontally welded to the lower end of the locking screw. Each support column has a screw hole at the lower part and the middle part of the front side end, and a manual fixing rod is screwed into each screw hole. The weight detection circuit includes resistors R3 and R4, transistor Q3, and buzzer B2 connected by circuit board wiring, and connected to the tension pressure sensor A3 through a wire. The signal output terminal 3 pin of the tension pressure sensor A3 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R4 and the base of the transistor Q3, the collector of the transistor Q3 is connected to the negative power input terminal of the buzzer B2, the negative power input terminal 2 pin of the tension pressure sensor A3 is connected to the emitter of the transistor Q3 and the other end of the resistor R4, and the positive power input terminal 1 pin of the tension pressure sensor A3 is connected to the positive power input terminal of the buzzer B2. The lift-off detection circuit includes an electric push rod M, a pressure sensor A2, a trigger subcircuit 11, and a power switch SK. The cylinder of the electric push rod M is vertically distributed and installed at the rear lower part of the rear support column. The upper end of the pressure sensor A2 and the lower end of the push column of the electric push rod M are fixedly installed together. The trigger subcircuit 11 and the power switch SK are installed in the electric control box 10. The power output terminals 3 and 4 of the power module A1 and the power input terminals 1 and 2 of the power switch SK are respectively connected via wires. The power output terminals 3, 4 and 5, 6 of the power switch SK and the positive and negative and negative and positive and negative power input terminals of the electric push rod M are respectively connected via wires. The trigger subcircuit includes resistors R and R1, Q1 and Q2, and buzzer B1 connected by circuit board wiring, and is connected to pressure sensor A2 by wires. The signal output terminal 3 of pressure sensor A2 is connected to one end of the first resistor R, the other end of the first resistor R is connected to the base of the first transistor Q1, the collector of the first transistor Q1 is connected to the base of the second transistor Q2 and one end of the second resistor R1, the other end of the second resistor R1 is connected to the positive power input terminal of buzzer B1, and the negative power input terminal 2 of pressure sensor A2 is connected to the emitters of two transistors Q1 and Q2. The power input terminals 1 and 2 of power module A1 are connected to the two poles of AC 220V power supply by wires, respectively, and the power output terminals 3 and 4 of power module A1 are connected to the power input terminal of the weight detection circuit, the 1 and 2 pins of pressure sensor A3, the power input terminal of the ground detection circuit, the positive power input terminal of buzzer B1 and the emitter of transistor Q1 by wires. The power input end of the electric winch 1 and the power output end of a positive and negative control power switch are connected in series and the two poles of the AC 220V power supply are respectively connected via wires (when working, the electric winch 1 controls the direction of its motor through the positive and negative power switches, and then controls the drum of the electric winch to rotate clockwise or counterclockwise to retract and release the wire rope, driving the cargo on the hook to rise or fall in height. This is an extremely mature technology available, and this application does not elaborate on the above working principle).

[0017] Figure 1 , 2As shown, the new type has four universal wheels 28, so it can be easily transferred to the corresponding workstation for operation. Before specific use, it is installed on the top of a dam or a building to lift maintenance tools or parts located at the lower end of the dam or the building, installed on the upper end of the production equipment to lift the raw materials located at the lower end of the hook, etc. Before lifting, the staff rotates the movable locking screw 26 downward along the limit plate 25, and after the lower end of the screw contact plate 261 contacts the ground, the entire equipment will effectively contact the ground, preventing the adverse effects of equipment displacement during lifting on lifting safety. After the subsequent lifting is completed, the staff rotates the movable locking screw 26 upward along the limit plate 25, and after the lower end of the screw contact plate 261 separates from the ground, the entire equipment will no longer contact the ground, which facilitates the transfer of the equipment to the next position. After the 220V AC power supply enters the power input terminal of the power module A1, the 3rd and 4th pins of the power module A1 output a stable DC 12V power supply that enters the power switch SK and the power input terminal of the weight detection circuit and the ground detection circuit, and the above circuits are powered on. Before hoisting, after the staff turns the handle of the power switch SK to the left or right, the 1, 2 and 3, 4 or 5, 6 pins of the power switch SK are connected respectively, and then the positive and negative or negative and positive power input terminals of the electric push rod M are energized; after the positive and negative power input terminals of the electric push rod M are energized, its push column pushes the pressure sensor A2 downward, and when the lower end force surface of the pressure sensor A2 effectively contacts the ground, the power switch is turned off to prepare for the subsequent detection of whether the rear end of the support arm is pried up. After the negative and positive power input terminals of the electric push rod M are energized, its push column drives the pressure sensor A2 upward, and when the lower end force surface of the pressure sensor A2 no longer contacts the ground, the power switch is turned off to prepare for the subsequent transfer of equipment. When hoisting goods, the weight of the goods will act on the force-bearing surface of the tension pressure sensor A3. The heavier the weight of the goods, the higher the voltage signal output by pin 3 of the tension pressure sensor A3, and vice versa. When the hoisted goods do not exceed the threshold (for example, not exceeding 800KG), the voltage signal output by pin 3 of the tension pressure sensor A2 is relatively low. After the voltage is divided by resistors R3 and R4, the voltage signal enters the base of the transistor Q3 and is lower than 0.7V. The transistor Q3 will not be turned on, and then the buzzer B2 will not be energized to sound, indicating that the hoisted goods are not overweight. When the hoisted cargo exceeds the threshold (for example, more than 800KG), the voltage signal output by pin 3 of the tension pressure sensor A3 is relatively high. After being divided by resistors R3 and R4, the voltage signal enters the base of transistor Q3 and is higher than 0.7V. The transistor Q3 will turn on the collector to output a low level and enter the negative power input terminal of the buzzer B2. The buzzer B2 will be energized and sound, indicating that the hoisted cargo is overweight. The staff can reduce the weight of the hoisted cargo and reduce the safety risk of hoisting.

[0018] Figure 1 , 2As shown, during hoisting, when the rear end of the support plate does not warp up (indicating that the hoisted cargo is not overweight), the force exerted by the force surface of the pressure sensor A2 in contact with the ground is relatively large, and the voltage signal output by its 3rd pin is relatively high. The voltage signal enters the base of the transistor Q1 through the resistor R for voltage reduction and current limiting, and is higher than 0.7V. The transistor Q1 is turned on, and the collector outputs a low level and enters the base of the transistor Q2. The base of the transistor Q2 is cut off without a suitable forward bias, so the buzzer B1 will not be energized and make a sound, indicating that the support arm is normal. During hoisting, when the rear end of the support arm is tilted upward or does not fully contact the ground (indicating that the hoisted cargo is heavy or the rear end of the support arm is not installed properly and does not effectively contact the ground), the force exerted by the force surface of the pressure sensor A2 in contact with the ground is relatively small, and the voltage signal output by its 3rd pin is relatively low. The voltage signal enters the base of the transistor Q1 through the resistor R with a voltage reduction and current limiting, which is lower than 0.7V. The collector of the transistor Q1 is cut off and stops outputting a low level, which enters the base of the transistor Q2. The base of the transistor Q2 obtains a suitable forward bias voltage through the resistor R1 with a voltage reduction and current limiting, and turns on the collector to output a low level, which enters the negative power input terminal of the buzzer B1. Then, the buzzer B1 will be energized and sound, indicating that the contact between the rear end of the support arm and the ground is not good. Through all the above technical solutions, the new type has four universal wheels, so it does not need to be disassembled and assembled, and can be easily transferred from one working position to another. Moreover, since it has a limit plate and a locking screw, it can prevent the overall displacement of the equipment during operation, which brings convenience to users and correspondingly improves work efficiency. When working, when the overweight threshold occurs and the rear end is off the ground, it can promptly prompt the workers to take targeted measures, reducing the probability of safety accidents. The power module A1 is a finished product of an AC 220V to DC 12V switching power module; the resistance values ​​of resistors R, R1, R3, and R4 are 10K, 100K, 12K, and 4K respectively (the larger the resistance value, the greater the partial pressure, and when the weight of the hoisted cargo is relatively small, the transistor Q3 will be turned on, that is, the weight threshold of the new hoisting device is set relatively low; the smaller the resistance value, the smaller the partial pressure, and when the weight of the hoisted cargo is relatively large, the transistor Q3 will be turned on, that is, the weight threshold of the new hoisting device is set relatively high); transistors Q1, Q2, and Q3 are NPN transistors of model 9013; buzzers B1 and B2 are active continuous sound buzzers of model FM12V. The finished product of buzzer alarm (the two have inconsistent sounds, which can be easily distinguished whether it is the cargo being too heavy or the rear end of the support arm being tilted up); the pressure sensor A3 is a finished product of pressure weighing sensor of model JHHM-H1, which has two power input terminals and one signal output terminal. The greater the gravity detected by the force surface, the higher the voltage signal output by the signal output terminal, and vice versa; the tension pressure sensor A2 is a finished product of tension pressure sensor of model DYLY-101, which has two power input terminals and one signal output terminal. The greater the gravity detected by the tension surface, the higher the voltage signal output by the signal output terminal, and vice versa; the electric push rod M is a finished product of reciprocating electric telescopic rod with a power of 50W.

[0019] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of hoist, comprising an electric winch, a support arm, a hook, a counterweight, a pulley, and a wire rope, characterized in that: It also has a weight detection circuit and a ground-lift detection circuit; the pulley is rotatably mounted on the front end of the support arm, and a reinforced steel wire rope is installed on the support arm; the electric winch is mounted on the rear end of the support arm, and the rear end of the steel wire rope is mounted on the drum of the electric winch, and the front end of the steel wire rope is led downward through the wheel groove of the pulley; connecting plates are respectively installed on the left and right sides of the front and rear lower ends of the support arm, and each connecting plate is respectively installed with an internal thread support column; a movable rod is respectively installed with a thread at the lower end of each support column, and a wheel is installed at the lower end of the movable rod; a limit plate is installed on the side of the movable rod, and a locking screw is installed on the limit plate; a limit rod is installed at the rear end of the support arm, and there are multiple counterweights, each of which has an opening, and multiple counterweights are movably sleeved on the outside of the limit rod through the opening; the weight detection circuit is equipped with a tension pressure sensor, the upper end of the force surface of the tension pressure sensor is installed with the front end of the steel wire rope, and the lower end of the force surface of the tension pressure sensor is installed with the hook; the weight detection circuit and the ground-lift detection circuit are installed in the electric control box.

2. A novel hoist according to claim 1, characterized in that: The lower end of the locking screw is horizontally mounted with an anti-slip contact plate.

3. A novel hoist according to claim 1, characterized in that: The weight detection circuit includes an electrically connected resistor, a transistor, and a buzzer, and is connected to a tension pressure sensor. The signal output end of the tension pressure sensor is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the second resistor and the base of the transistor, the collector of the transistor is connected to the negative power input end of the buzzer, the negative power input end of the tension pressure sensor is connected to the emitter of the transistor and the other end of the second resistor, and the positive power input end of the tension pressure sensor is connected to the positive power input end of the buzzer.

4. A novel hoist according to claim 1, characterized in that: The lift-off detection circuit includes an electric push rod, a pressure sensor, a trigger sub-circuit, and a power switch. The cylinder of the electric push rod is vertically distributed and installed on the outside of the rear end support column. The upper end of the pressure sensor and the lower end of the push column of the electric push rod are installed together. The trigger sub-circuit and the power switch are installed in the electric control box.

5. A novel hoist according to claim 4, characterized in that: The trigger subcircuit includes an electrically connected resistor, a transistor, and a buzzer, and is connected to a pressure sensor. The signal output end of the pressure sensor is connected to one end of the first resistor, the other end of the first resistor is connected to the base of the first transistor, the collector of the first transistor is connected to the base of the second transistor and one end of the second resistor, the other end of the second resistor is connected to the positive power input end of the buzzer, and the negative power input end of the pressure sensor is connected to the emitters of the two transistors.

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