Safety electric lock and construction hoist

Abstract

The safety electric lock comprises a lock body, an electromagnet assembly and a push rod, the electromagnet assembly and the push rod are arranged on the lock body, the electromagnet assembly is provided with a moving rod capable of moving in a reciprocating mode, the push rod is connected with the output end of the moving rod, and the lock body is provided with a through hole used for guiding the push rod. The induction rod is connected with the end, away from the push rod, of the moving rod, the induction piece is located on the side pointed by the end, away from the moving rod, of the induction rod, and the controller is electrically connected with the induction piece and the electromagnet assembly. And when the induction piece is in contact with the induction rod, the controller reduces the voltage transmitted to the electromagnet assembly. The safety electric lock solves the technical problems that an existing device is high in cost, large in size and high in control complexity. The safety electric lock and the construction hoist are small in size, low in cost and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of construction hoists, in particular to a safety electric lock and a construction hoist. Background Art

[0002] In modern construction, as a key device for vertical transportation, the safety locking of the discharge door of a construction hoist is of great importance. At present, many construction hoists use electromagnetic locks as the locking mechanism for the discharge door. Such electromagnetic locks include a lock body, an electromagnet assembly and a push rod provided on the lock body. The electromagnet assembly has a movable rod that can reciprocate. The push rod is connected to the output end of the movable rod. The lock body has a through hole for guiding the push rod, and the push rod reciprocates in the through hole. Such electromagnetic locks usually include multiple independent windings, each winding having a different resistance value, so that corresponding magnetic forces can be generated under different currents to achieve adjustable thrust output. Due to the complex construction environment at the construction site, the electromagnetic lock is very likely to be invaded by foreign matters such as cement and sand. At the initial stage of startup, the electromagnetic lock needs to generate a large magnetic pulling force to overcome the resistance of foreign matters such as cement and sand to the push rod. Once the push rod is in place, in order to save energy and avoid overheating, the electromagnetic lock will switch to a lower magnetic force mode to maintain the locked state.

[0003] Although the electromagnetic lock with multiple windings provides a certain degree of flexibility, this method has significant disadvantages:

[0004] High cost: The additional windings increase the manufacturing cost. At the same time, the complex circuit design and additional electronic components increase the overall cost.

[0005] Large volume: Multiple windings and necessary switching mechanisms lead to an increase in the volume of the electromagnetic lock, affecting its installation and use in space-constrained environments.

[0006] High control complexity: The switching between windings requires precise circuit design and control logic, increasing the system complexity and also increasing the potential failure rate.

[0007] Therefore, there is an urgent need to design an electromagnetic lock that can switch to generate different magnitudes of magnetic force, while having a small volume, low cost, and high reliability. Summary of the Utility Model

[0008] To solve the technical problems of high cost, large volume, and high control complexity of the existing device, the utility model provides a safety electric lock and a construction hoist with a small volume, low cost, and high reliability.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] Safety electric lock, including a lock body, an electromagnet assembly and a push rod arranged on the lock body. The electromagnet assembly has a movable rod that can reciprocate. The push rod is connected to the output end of the movable rod. The lock body has a through hole for guiding the push rod, and the push rod reciprocates in the through hole. It also includes a controller, a sensing member and a sensing rod arranged on the lock body. The sensing rod is connected to the end of the movable rod away from the push rod. The sensing member is located on the side pointed by the end of the sensing rod away from the movable rod. The controller is electrically connected to the sensing member and the electromagnet assembly respectively. When the sensing member contacts the sensing rod, the controller reduces the voltage supplied to the electromagnet assembly.

[0011] Further, the sensing member is a spring dial.

[0012] Construction elevator, including a cage and a discharge door arranged on one side of the cage, and also including the safety electric lock described in any one of the above embodiments. The lock body is arranged on the cage, and the discharge door is provided with a lock groove corresponding to the push rod.

[0013] Further, the push rod is made of stainless steel.

[0014] The controller adopted in this solution is a technology known to those skilled in the art. A well-known computer program is used to convert the contact or separation signal between the sensing member and the sensing rod into an electrical signal for adjusting the voltage supplied to the electromagnet assembly.

[0015] The beneficial effects of the present utility model are:

[0016] By introducing the combination of a controller, a sensing member and a sensing rod, the safety electric lock can automatically adjust the working voltage of the electromagnet assembly according to the contact state between the sensing member and the sensing rod. This design not only simplifies the complexity of the traditional multi-stage winding electromagnetic lock, but also reduces the required space and lowers the manufacturing cost.

[0017] Simplify the control logic: Using a spring dial as the sensing member, its simple design reduces the complexity of the control system, lowers the potential failure rate, and is also convenient for maintenance and replacement.

[0018] Integration of construction elevator: Integrate the improved safety electric lock onto the cage of the construction elevator to ensure the reliable locking of the discharge door. The matching design of the push rod and the lock groove improves the overall safety of the system and prevents unauthorized opening.

[0019] Selection of corrosion-resistant materials: Select stainless steel as the material of the push rod, which enhances the durability and corrosion resistance of the safety electric lock, especially suitable for the harsh conditions that may be encountered in the construction environment, and extends the service life of the equipment.

[0020] In summary, through innovation in structure and function, this utility model design solves problems such as cost, volume, and control complexity existing in traditional electromagnetic locks, providing a more economical, compact, and reliable solution, which is particularly suitable for the application scenarios of vertical transportation equipment such as construction hoists. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 6 is a schematic structural diagram of the safety electric lock of this utility model installed on a construction hoist;

[0022] Figure 2 FIG. 10 is a schematic structural diagram with the push rod retracted;

[0023] Figure 3 FIG. 14 is Figure 2 an overall cross-sectional view of

[0024] Figure 4 FIG. 20 is a schematic structural diagram with the push rod extended;

[0025] Figure 5 FIG. 24 is Figure 4 an overall cross-sectional view of

[0026] In the figures, the markings are as follows: 1 - lock body, 11 - through hole, 2 - electromagnet assembly, 21 - moving rod, 3 - push rod, 4 - sensing member, 5 - sensing rod, 6 - cage, 7 - discharge door, 8 - lock groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application more clearly expressed, the following further describes this utility model with reference to the accompanying drawings.

[0028] First, it should be stated that a clear and complete description of the technical solutions of the embodiments of this application is made. The described embodiments are part of the embodiments of this application, rather than limitations on this utility model. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by this application.

[0029] In the description of this utility model, it should be understood that the orientation or positional relationships indicated by terms such as "first", "second", "upper", "lower", "left", "right", "inner", "outer", "axial", or "radial" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this utility model, rather than indicating or implying that the indicated devices or elements must have specific orientations, configurations, and operations. Therefore, they should not be construed as limitations on this utility model.

[0030] It should be noted that in the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] Referring to Figures 1 to 5 , the present utility model provides a safety electric lock and a construction hoist.

[0032] As Figures 2 to 5 , in the embodiment of this solution, the safety electric lock includes a lock body 1, an electromagnet assembly 2 and a push rod 3 provided on the lock body 1. The electromagnet assembly 2 has a movable rod 21 that can reciprocate. The push rod 3 is connected to the output end of the movable rod 21. The lock body 1 has a through hole 11 for guiding the push rod 3. The push rod 3 reciprocates in the through hole 11. It also includes a controller, and a sensing member 4 and a sensing rod 5 provided on the lock body 1. The sensing rod 5 is connected to the end of the movable rod 21 away from the push rod 3. The sensing member 4 is located on the side pointed to by the end of the sensing rod 5 away from the movable rod 21. The controller is electrically connected to the sensing member 4 and the electromagnet assembly 2 respectively. When the sensing member 4 contacts the sensing rod 5, the controller reduces the voltage supplied to the electromagnet assembly 2.

[0033] In this embodiment, a controller for controlling the input of the power supply voltage is provided to adjust the voltage supplied to the electromagnet assembly 2, so as to control the magnetic force. This is because in the complex working environment of the construction site, impurities such as cement and dust are likely to invade the electromagnet assembly 2, resulting in the magnetic force generated by the electromagnet assembly 2 being unable to overcome the resistance generated by the impurities, making the safety electric lock unable to work normally. Therefore, when the electromagnet assembly 2 starts, it needs to generate a large magnetic force to overcome the resistance. When the electromagnet assembly 2 is fully retracted, if it maintains a high magnetic force state for a long time, the power is too high, which will easily cause the electromagnet assembly 2 to overheat and greatly reduce its service life. Therefore, a safety electric lock that can variably adjust the magnetic force needs to be designed.

[0034] In this solution, a high voltage and a low voltage are set, preferably 24V and 8V, and combinations such as 23V and 9V, 22V and 8V are also acceptable. As long as the high voltage can ensure that the electromagnet assembly 2 can overcome the resistance, and the low voltage can overcome the elastic force of the electromagnet assembly 2. The high voltage corresponds to the retraction movement of the push rod 3, and the low voltage corresponds to the maintenance movement after the push rod 3 is retracted. The electromagnet assembly 2 switches between two voltage values of 24V and 8V. This means that a higher voltage (24V) can be used at startup to overcome the resistance brought by foreign objects. Once the push rod is in place, it can automatically switch to a lower voltage (8V) to maintain the locked state, while reducing energy consumption and the risk of overheating.

[0035] The working process is as follows: When the electromagnet assembly 2 is not powered on, the electromagnet assembly 2 has a certain elastic force, driving the push rod 3 to extend. The push rod 3 cooperates with the lock groove 8, which is the door-locking state. After the controller receives the door-opening signal, the electromagnet assembly 2 is powered on. In the state of being powered on with a high voltage (such as 24V), the push rod 3 quickly retracts. At the moment when the retraction is in place, the induction rod 5 contacts the induction part 4. The controller controls the voltage supplied to the electromagnet assembly 2 to change from a high voltage to a low voltage (such as from 24V to 8V). The electromagnet assembly 2 can maintain the suction force to ensure that the push rod 3 does not pop out. Since the electromagnet assembly 2 works under a low voltage state, the power consumption of the electromagnet assembly 2 drops from the rated power of 72W to 8W. In this state, the electromagnet assembly 2 can work for a long time without overheating and can continue to work. After receiving the start instruction of the suspension cage 6, the electromagnet assembly 2 loses power, and the push rod 3 quickly pops out to lock the discharge door 7 to prevent people from opening the door artificially.

[0036] In some embodiments, the induction part 4 is a spring flap. Using a spring flap as the induction part 4, its simple design reduces the complexity of the control system, reduces the potential failure rate, and is also convenient for maintenance and replacement. In the foregoing embodiments, other elastic metal sheets or metal rods can also be selected.

[0037] As Figure 1 shown, the present utility model also provides a construction hoist, which includes a suspension cage 6 and a discharge door 7 arranged on one side of the suspension cage 6, and also includes the safety electric lock described in any one of the above embodiments. The lock body 1 is arranged on the suspension cage 6, and the discharge door 7 is provided with a lock groove 8 corresponding to the push rod 3. The specific structure of this safety electric lock refers to the above embodiments. Since this construction hoist adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0038] In some embodiments, the push rod 3 is made of stainless steel.

Claims

1. A safety electric lock, comprising a lock body (1), an electromagnet assembly (2) and a push rod (3) arranged on the lock body (1), wherein the electromagnet assembly (2) has a moving rod (21) capable of reciprocating movement, the push rod (3) is connected to an output end of the moving rod (21), the lock body (1) has a through hole (11) for guiding the push rod (3), and the push rod (3) reciprocates in the through hole (11), wherein the characteristics are: The lock body (1) further comprises a controller, a sensing element (4) and a sensing rod (5) arranged on the lock body (1); the sensing rod (5) is connected to an end of the motion rod (21) away from the push rod (3); the sensing element (4) is located on the side pointed to by the end of the sensing rod (5) away from the motion rod (21); the controller is electrically connected to the sensing element (4) and the electromagnet assembly (2) respectively; when the sensing element (4) and the sensing rod (5) are in contact, the controller reduces the voltage supplied to the electromagnet assembly (2).

2. The safety electric lock according to claim 1, characterized in that: The induction member (4) is a spring pick.

3. A construction hoist, comprising a cage (6) and a discharge door (7) arranged on one side of the cage (6), characterized in that: It also includes the safety electric lock as described in any one of claims 1 to 2, wherein the lock body (1) is arranged on the cage (6), and the discharge door (7) is provided with a lock groove (8) corresponding to the push rod (3).

4. The construction elevator according to claim 3, characterized in that: The push rod (3) is made of stainless steel.

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