Cabinet door lock capable of self-adapting to temperature change and preventing low-temperature lagging and high-temperature expansion failure

Abstract

The invention relates to the technical field of cabinet door locks, in particular to a cabinet door lock capable of self-adapting to temperature change and preventing low-temperature lagging and high-temperature expansion failure. According to the technical scheme, a locking seat is arranged on one side of a shell, a second action module is arranged in the shell, a first action module is arranged on the outer side of the shell, a magnet vane is arranged between the shell and the first action module, and the first action module drives a guide sleeve to be in butt joint with the locking seat. The second action module comprises a motor, the output end of the motor is connected with a lead screw, the lead screw is in threaded connection with a sliding sleeve, a graphite lubricating layer is arranged between the lead screw and the sliding sleeve, the sliding sleeve can move telescopically, a guide head is arranged at the tail end, and the sliding sleeve can penetrate through the guide sleeve to be inserted into the locking seat after the guide sleeve is in butt joint with the locking seat. Fixing plates are arranged on the two sides of the locking seat socket, fixing holes are formed in the plates, the socket is provided with jacks, and the second action module sliding sleeve and the guide sleeve can be inserted into the jacks. The influence of motor heat on the shell is reduced, and high-temperature expansion failure is prevented; the elastic rubber gasket is used for compensating material expansion, stable and reliable work is ensured, and the practicability and durability of the cabinet door lock are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cabinet door locks, and in particular to a cabinet door lock capable of adaptively adapting to temperature changes and preventing low-temperature jamming and high-temperature expansion failure. Background Art

[0002] Cabinet door locks are devices used to lock all kinds of cabinets. They are mainly used to protect the safety and privacy of items in the cabinets and ensure that unauthorized people cannot open the cabinets at will. Cabinet door locks are usually made of metal materials and contain complex mechanical or electronic structures to achieve the functions of unlocking and locking. For example, a mechanical lock body has components such as a lock cylinder, a pin, and a lock tongue, while an electronic lock body has components such as a circuit board and a motor.

[0003] After searching, the patent application number CN202010285090.9 discloses an automatic opening and closing mechanism for container doors. Although the device realizes the automatic operation of the door through magnetic adsorption and telescopic components, its metal parts are easily blocked due to thermal expansion differences in extreme temperature environments, and no heat insulation measures are adopted. After long-term operation, the heat generated by the drive motor may cause the permanent magnet to demagnetize, affecting reliability. In addition, the device relies on traditional grease, and the increased viscosity in low-temperature environments increases the movement resistance, which cannot meet the requirements of harsh working conditions. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, thereby solving the problems raised in the background technology.

[0005] The solution of the present invention to solve the above technical problems is as follows: A cabinet door lock capable of adaptively changing temperature and preventing low-temperature jamming and high-temperature expansion failure comprises a shell, a lock seat is installed on one side of the shell, and a second action module is installed inside the shell. The output end of the second action module is sleeved with a guide sleeve, the outer side of the shell is installed with a first action module, a magnetic isolation plate is installed between the shell and the first action module, the first action module is connected with the guide sleeve in a transmission manner, the guide sleeve is driven by the first action module to dock with the lock seat, the second action module is provided with a motor, the output end of the motor is provided with a screw rod, a sleeve is threadedly connected to the screw rod, a graphite lubricating layer is provided between the screw rod and the sleeve, the sleeve is driven by the screw rod to move telescopically, a guide head is provided at the end of the sleeve, after the guide sleeve is docked with the lock seat, the sleeve of the second action module penetrates the guide sleeve and is inserted into the lock seat; The lock seat is provided with a socket, and fixing plates are provided on both sides of the socket. The fixing plates are provided with fixing holes, and the socket is provided with a plug hole. The sliding sleeve and the guide sleeve of the second action module are inserted into the plug hole of the lock seat.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the first action module is provided with an electromagnet, a permanent magnet is installed on one side of the electromagnet, a connecting shaft is connected to the permanent magnet, and a connecting plate is installed on the connecting shaft.

[0008] The beneficial effects of adopting the above further scheme are: When the electromagnet is energized, it will generate a magnetic field. According to the electromagnetic principle, the direction of the current determines the direction of the magnetic field. The direction of the current can be controlled to make the magnetic field generated by the electromagnet interact with the magnetic field of the permanent magnet to generate suction or repulsion. When suction is generated, the electromagnet attracts the permanent magnet, and the permanent magnet drives the connecting plate to move toward the electromagnet through the connecting shaft; when repulsion is generated, the electromagnet pushes the permanent magnet away, and the connecting plate moves away from the electromagnet. This method of driving by electromagnetic force has a fast response speed and can realize the movement of the connecting plate in a short time. Compared with the traditional mechanical drive method, it reduces the probability of mechanical wear and failure, improves the working efficiency and stability of the first action module, and thus provides a strong guarantee for the rapid locking and unlocking of the entire cabinet door lock.

[0009] Furthermore, the guide sleeve is provided with a mounting plate, the connecting plate is mounted on the mounting plate, a spring is mounted on one side of the mounting plate, a sleeve is mounted on the end of the spring facing away from the mounting plate, a guide slope is provided at the end of the sleeve, and a second slide groove is opened through the sleeve.

[0010] The beneficial effects of adopting the above further scheme are: The connecting plate is connected to the mounting plate. When the first action module drives the connecting plate to move, the connecting plate drives the mounting plate to move synchronously. The mounting plate is connected to the sleeve through a spring. The spring is elastic. During the movement of the mounting plate, the spring can play a role of buffering and adjustment. When the mounting plate moves at a fast speed or is impacted by the outside world, the spring can absorb part of the energy to prevent the sleeve from being damaged by excessive impact force. The guide bevel at the end of the sleeve has a guiding function. When the sleeve needs to be inserted into the socket of the lock seat, if there is a certain misalignment between the sleeve and the axis of the socket, after the guide bevel contacts the edge of the socket, under the action of the bevel, a component force will be generated to move the sleeve toward the axis of the socket, so that the sleeve can automatically adjust its position and smoothly insert the socket, thereby improving the success rate and convenience of docking. The second slide groove on the sleeve provides the function of limiting and guiding for the installation and movement of the sleeve, and cooperates with other components to ensure that the sleeve can only move in a specific direction, ensuring the accuracy and stability of its movement.

[0011] Furthermore, the sleeve is installed on the sliding sleeve in a limited manner by the cooperation between the second sliding groove and the limiting rod.

[0012] The beneficial effects of adopting the above further scheme are: The limit rod is embedded in the second slide groove of the sleeve, forming a sliding pair structure. This structure makes the installation of the sleeve on the sleeve more stable, and at the same time limits the movement of the sleeve. The sleeve can only make a linear motion relative to the sleeve along the direction of the second slide groove, and cannot rotate or shift at will. When the second action module drives the sleeve to move, the sleeve can drive the sleeve to move together through the cooperation of the limit rod and the second slide groove, ensuring the synchronization and coordination of the movement of the sleeve and the sleeve. Moreover, this limiting structure can also prevent the sleeve from shaking or detaching from the sleeve during movement, thereby improving the reliability and stability of the entire lock structure and ensuring the smooth locking and unlocking actions.

[0013] Furthermore, a limiting groove is provided in the shell, and the sliding sleeve is installed in the shell in a limited manner by the cooperation between the limiting rod and the limiting groove.

[0014] The beneficial effects of adopting the above further scheme are: The limit rod on the sleeve cooperates with the limit groove in the shell to guide and limit the movement of the sleeve. The limit groove defines the movement path of the sleeve, and the sleeve can only move linearly in the shell along the direction of the limit groove, thus preventing the sleeve from deflecting or shaking during movement. When the motor of the second action module drives the lead screw to rotate, so that the sleeve moves telescopically under the action of the lead screw, the limit rod slides in the limit groove to ensure the straightness and accuracy of the sleeve movement. This limiting structure can effectively reduce the friction and collision between the sleeve and other components, reduce the wear of the components, extend the service life of the components, and also improve the working accuracy and stability of the entire lock.

[0015] Furthermore, the aperture of the insertion hole is larger than the diameter of the sleeve. When the sleeve and the axis of the insertion hole are misaligned, the sleeve is inserted into the insertion hole through the interaction between the guiding inclined surface and the insertion hole.

[0016] The beneficial effects of adopting the above further scheme are: The diameter of the socket is larger than the diameter of the sleeve, which provides a certain tolerance for the insertion of the sleeve into the socket. In the actual installation and use process, due to the influence of various factors, the axis of the sleeve and the socket may be misaligned to a certain extent. When this happens, the guide bevel at the end of the sleeve comes into play. After the guide bevel contacts the edge of the socket, under the interaction between the two, according to the principle of force decomposition, a component force will be generated to move the sleeve toward the axis of the socket. As the sleeve continues to advance, this component force will continuously adjust the position of the sleeve, so that the sleeve gradually aligns with the axis of the socket, and finally smoothly inserts into the socket. This design reduces the requirements for the alignment accuracy of the sleeve and the axis of the socket during installation and use, improves the installation convenience and practicality of the lock, and ensures the normal operation of the lock even in the presence of certain installation errors.

[0017] Furthermore, when the first action module pushes the mounting plate to move, the mounting plate pushes the sleeve via the spring.

[0018] The beneficial effects of adopting the above further scheme are: When the first action module works and pushes the mounting plate to move, the mounting plate and the sleeve are connected by a spring. The spring has the characteristic of elastic deformation. In the process of the mounting plate pushing the sleeve, the spring can be extended and retracted according to the actual situation. If the moving speed of the mounting plate is fast or the external resistance is large, the spring will be compressed and absorb part of the energy to prevent the sleeve from being damaged by excessive impact force. At the same time, the spring can also play a regulating role. When the sleeve encounters a slight obstacle during the insertion of the socket, the spring can buffer this obstacle through its own elastic deformation, so that the sleeve can be inserted into the socket more smoothly. Moreover, the elasticity of the spring can compensate for the slight changes in the size of the components caused by factors such as temperature changes, ensuring that under different working conditions, the mounting plate can effectively push the sleeve to complete the corresponding action, thereby improving the reliability and adaptability of the lock.

[0019] Furthermore, a thermal insulation layer is provided between the motor and the housing, and the thermal insulation layer is an aerogel thermal insulation pad. The aerogel thermal insulation pad has a porous network structure composed of nano-scale silica particles, a porosity of ≥95%, and a thermal conductivity of ≤0.015W / (m·K); the thermal insulation layer forms a heat-blocking interface with the motor housing and the inner wall of the housing through an adhesive, and the thickness of the thermal insulation layer is 2-3mm.

[0020] The beneficial effects of adopting the above further scheme are: The motor generates heat during operation. According to the principle of heat transfer, heat will be transferred from the high-temperature motor to the low-temperature surrounding environment, including to the outer shell. If there is no thermal insulation layer, a large amount of heat will be transferred to the outer shell, which will increase the temperature of the outer shell. Since the outer shell is usually made of metal materials such as aluminum alloy, metal materials have the characteristics of thermal expansion and contraction. When the temperature rises, the outer shell will expand. If the temperature is too high and the expansion is too large, the size of the outer shell may change, affecting the matching accuracy of the outer shell and other components, and may even cause high-temperature expansion failure such as component jamming and malfunction. The thermal insulation layer uses materials with low thermal conductivity, which can effectively block the transfer of heat, reduce the impact of the heat generated by the motor on the outer shell, keep the temperature of the outer shell within a relatively stable range, avoid failure problems caused by high-temperature expansion, and ensure the normal operation and structural stability of the cabinet door lock in a high-temperature environment.

[0021] Furthermore, the shell and the lock seat are made of aluminum alloy with an anti-oxidation coating on the surface. The fixing plate is fixed to the cabinet by stainless steel bolts. An elastic rubber gasket is provided in the fixing hole to compensate for material expansion caused by temperature changes.

[0022] The beneficial effects of adopting the above further scheme are: Aluminum alloy has the advantages of low density, high strength and good thermal conductivity. The use of aluminum alloy to make the shell and lock seat can reduce the weight of the lock while ensuring the structural strength of the lock, making it easy to install and use. The anti-oxidation coating on the surface can prevent the aluminum alloy from rusting and corroding due to chemical reactions with oxygen and moisture in the air, thereby extending the service life of the shell and lock seat. The fixing plate and the cabinet are fixed by stainless steel bolts. Stainless steel has good corrosion resistance and can maintain stable performance under different environmental conditions, avoiding the problem of loose connection caused by rust and corrosion of the bolts, and ensuring the firmness of the lock installation. The elastic rubber gasket in the fixing hole is elastic. When the ambient temperature changes, the expansion coefficients of different materials are different, and the aluminum alloy shell and lock seat, cabinet, stainless steel bolts and other components will expand or contract to different degrees. The elastic rubber gasket can compensate for the material expansion difference caused by temperature change through its own elastic deformation, avoid stress concentration caused by inconsistent material expansion, prevent component damage or loose connection, and ensure the stability and reliability of the lock in different temperature environments.

[0023] The present invention provides a cabinet door lock that can adapt to temperature changes and prevent low-temperature jamming and high-temperature expansion failure. It has the following beneficial effects: An insulation layer is set between the motor and the housing to reduce the impact of the heat generated by the motor on the housing and avoid failure of the housing due to expansion caused by high temperature. At the same time, the housing and the lock seat are made of aluminum alloy with an anti-oxidation coating. Aluminum alloy has good heat dissipation, the coating can prevent oxidation, and can assist in regulating the temperature to a certain extent. An elastic rubber gasket is set in the fixing hole of the lock seat fixing plate to compensate for the expansion of the material at high temperature, avoid structural stress concentration, and ensure the stability of the installation. The graphite lubricating layer between the screw and the sleeve can maintain good lubrication performance in low temperature environments, prevent ordinary lubricants from thickening or solidifying, causing poor movement of components, and ensure that the lock can still work normally at low temperatures.

[0024] The first action module is composed of an electromagnet and a permanent magnet, which can quickly drive the guide sleeve to dock with the lock seat to achieve rapid locking and unlocking, thereby improving operational efficiency. The second action module uses a motor to drive the lead screw to telescopically move the sleeve, providing a reliable locking function for the lock. The dual modules work together to enhance the practicality and reliability of the lock. The limit groove in the housing cooperates with the limit rod on the sleeve, and the sleeve cooperates with the limit rod through the second slide groove, which can effectively limit the movement of the sleeve and the sleeve, ensuring the accuracy and stability of the movement of each component and making the lock more precise.

[0025] A guiding bevel is provided at the end of the sleeve, and the diameter of the jack is larger than the diameter of the sleeve. When the sleeve and the jack are misaligned, the guiding bevel interacts with the jack, allowing the sleeve to be smoothly inserted into the jack, reducing the difficulty of docking caused by position deviation during installation and use, and improving the convenience and versatility of the lock.

[0026] The housing and lock seat are made of aluminum alloy and coated with an anti-oxidation coating, which not only has good heat dissipation, but also effectively prevents oxidation corrosion and prolongs the service life of the lock. The fixing plate and the cabinet are fixed with stainless steel bolts, which further enhances the corrosion resistance of the lock and the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] In the attached picture: Figure 1 It is a schematic diagram of the main appearance of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the unlocking state of the present invention; Figure 4 It is a schematic diagram of the locking state of the present invention; Figure 5It is a schematic diagram of the structure of the second action module of the present invention; Figure 6 It is a schematic diagram of the guide sleeve structure of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Locking seat; 101. Socket; 102. Fixing plate; 103. Fixing hole; 104. Socket; 2. Magnetic isolation plate; 201. First slide groove; 3. First action module; 301. Connecting plate; 302. Connecting shaft; 303. Permanent magnet; 304. Electromagnet; 4. Second action module; 401. Motor; 402. Screw rod; 403. Limit rod; 404. Sleeve; 405. Guide head; 5. Housing; 501. Limiting groove; 6. Guide sleeve; 601. Mounting plate; 602. Spring; 603. Sleeve; 604. Guide ramp; 605. Second slide groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 6 As shown, the embodiments provided by the present invention are: Embodiment 1: A cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, comprising a housing 5, a lock seat 1 is installed on one side of the housing 5, a second action module 4 is installed inside the housing 5, the output end of the second action module 4 is sleeved with a guide sleeve 6, the guide sleeve 6 is provided with a mounting plate 601, the connecting plate 301 is installed on the mounting plate 601, when the first action module 3 pushes the mounting plate 601 to move, the mounting plate 601 pushes the sleeve 603 through the spring 602, when the first action module 3 works and pushes the mounting plate 601 to move, the mounting plate 601 and the sleeve 603 are connected by the spring 602. The spring 602 has the characteristic of elastic deformation, and in the process of the mounting plate 601 pushing the sleeve 603, the spring 602 can be extended and retracted according to the actual situation. If the moving speed of the mounting plate 601 is fast or the external resistance is large, the spring 602 will be compressed, absorbing part of the energy, and preventing the sleeve 603 from being damaged by excessive impact force. At the same time, the spring 602 can also play a regulating role. When the sleeve 603 encounters a slight obstacle during the insertion of the socket 104, the spring 602 can buffer this obstacle through its own elastic deformation, so that the sleeve 603 can be inserted into the socket 104 more smoothly. In addition, the elasticity of the spring 602 can compensate for the slight changes in the size of the component caused by factors such as temperature changes, ensuring that the mounting plate 601 can effectively push the sleeve 603 to complete the corresponding action under different working conditions, thereby improving the reliability and adaptability of the lock. The spring 602 is installed on one side of the mounting plate 601, and the sleeve 603 is installed on the end of the spring 602 away from the mounting plate 601. The sleeve 603 is limitedly installed on the sliding sleeve 404 through the second sliding groove 605 and the limiting rod 403. The limiting rod 403 is embedded in the second sliding groove 605 of the sleeve 603, forming a sliding pair structure. This structure makes the installation of the sleeve 603 on the sliding sleeve 404 more stable, and at the same time limits the movement of the sleeve 603. The sleeve 603 can only move linearly relative to the sleeve 404 along the direction of the second slide groove 605, and cannot rotate or deviate at will. When the second action module 4 drives the sleeve 404 to move, the sleeve 404 can drive the sleeve 603 to move together through the cooperation of the limiting rod 403 and the second slide groove 605, thereby ensuring the synchronization and coordination of the movement of the sleeve 603 and the sleeve 404. Moreover, this limiting structure can also prevent the sleeve 603 from shaking or detaching from the sleeve 404 during the movement, thereby improving the reliability and stability of the entire lock structure and ensuring the smooth locking and unlocking actions. A limiting groove 501 is provided in the housing 5, and the sleeve 404 is installed in the housing 5 through the cooperation of the limiting rod 403 and the limiting groove 501. The limiting rod 403 on the sleeve 404 cooperates with the limiting groove 501 in the housing 5, thereby playing a guiding and limiting role in the movement of the sleeve 404.The limiting groove 501 defines the movement path of the sleeve 404. The sleeve 404 can only move linearly in the housing 5 along the direction of the limiting groove 501, thereby preventing the sleeve 404 from deflecting or shaking during the movement. When the motor 401 of the second action module 4 drives the screw rod 402 to rotate, so that the sleeve 404 moves telescopically under the action of the screw rod 402, the limiting rod 403 slides in the limiting groove 501, thereby ensuring the straightness and accuracy of the movement of the sleeve 404. This limiting structure can effectively reduce the friction and collision between the sleeve 404 and other components, reduce the wear of the components, extend the service life of the components, and also improve the working accuracy and stability of the entire lock. The end of the sleeve 603 is provided with a guide slope 604, and the sleeve 603 is penetrated with a second slide groove 605. The connecting plate 301 is connected to the mounting plate 601. When the first action module 3 drives the connecting plate 301 to move, the connecting plate 301 drives the mounting plate 601 to move synchronously. The mounting plate 601 is connected to the sleeve 603 through a spring 602, and the spring 602 is elastic. During the movement of the mounting plate 601, the spring 602 can play a role of buffering and adjustment. When the mounting plate 601 moves at a fast speed or is impacted by the outside world, the spring 602 can absorb part of the energy to prevent the sleeve 603 from being damaged by excessive impact force. The guiding inclined surface 604 at the end of the sleeve 603 has a guiding function. When the sleeve 603 needs to be inserted into the socket 104 of the lock seat 1, if there is a certain misalignment between the sleeve 603 and the axis of the socket 104, after the guiding inclined surface 604 contacts the edge of the socket 104, under the action of the inclined surface, a component force will be generated to move the sleeve 603 toward the axis of the socket 104, so that the sleeve 603 can automatically adjust its position and smoothly insert into the socket 104, thereby improving the success rate and convenience of docking. The second slide groove 605 on the sleeve 603 provides a limiting and guiding function for the installation and movement of the sleeve 603, and cooperates with other components to ensure that the sleeve 603 can only move in a specific direction, ensuring the accuracy and stability of its movement. The first action module 3 is installed on the outer side of the shell 5, and the first action module 3 is provided with an electromagnet 304. A permanent magnet 303 is installed on one side of the electromagnet 304. A connecting shaft 302 is connected to the permanent magnet 303, and a connecting plate 301 is installed on the connecting shaft 302. When the electromagnet 304 is energized, the electromagnet 304 will generate a magnetic field. According to the electromagnetic principle, the direction of the current determines the direction of the magnetic field. The magnetic field generated by the electromagnet 304 can interact with the magnetic field of the permanent magnet 303 by controlling the direction of the current to generate attraction or repulsion. When suction is generated, the electromagnet 304 attracts the permanent magnet 303, and the permanent magnet 303 drives the connecting plate 301 to move toward the electromagnet 304 through the connecting shaft 302; when repulsion is generated, the electromagnet 304 pushes the permanent magnet 303 away, and the connecting plate 301 moves away from the electromagnet 304.This electromagnetic force driving method has a fast response speed and can realize the movement of the connecting plate 301 in a short time. Compared with the traditional mechanical driving method, it reduces the probability of mechanical wear and failure, improves the working efficiency and stability of the first action module 3, and thus provides a strong guarantee for the rapid locking and unlocking of the entire cabinet door lock. A magnetic isolation plate 2 is installed between the shell 5 and the first action module 3. The first action module 3 is connected to the guide sleeve 6 through transmission. The guide sleeve 6 is connected to the lock seat 1 through the drive of the first action module 3. The second action module 4 is provided with a motor 4 01. A heat insulation layer is provided between the motor 401 and the housing 5. The heat insulation layer is an aerogel heat insulation pad. The aerogel heat insulation pad is composed of nano-scale silica particles to form a porous network structure, with a porosity of ≥95% and a thermal conductivity of ≤0.015W / (m·K). The heat insulation layer forms a heat blocking interface with the motor 401 housing and the inner wall of the housing 5 through an adhesive. The thickness of the heat insulation layer is 2-3mm. The motor 401 generates heat during operation. According to the principle of heat transfer, the heat will be transferred from the high-temperature motor 401 to the low-temperature surrounding environment, including to the housing 5. If there is no heat insulation layer, a large amount of heat will be transferred to the housing 5, which will increase the temperature of the housing 5. Since the housing 5 is usually made of metal materials such as aluminum alloy, the metal material has the characteristics of thermal expansion and contraction. When the temperature rises, the housing 5 will expand. If the temperature is too high and the expansion is too large, the size of the housing 5 may change, affecting the matching accuracy of the housing 5 and other components, and may even cause high-temperature expansion failure problems such as component jamming and inability to work normally. The heat insulation layer is made of a material with a low thermal conductivity, which can effectively block the transfer of heat and reduce the impact of the heat generated by the motor 401 on the shell 5, so that the temperature of the shell 5 is maintained in a relatively stable range, avoiding failure problems caused by high-temperature expansion, and ensuring the normal operation and structural stability of the cabinet door lock in a high-temperature environment. A screw rod 402 is provided at the output end of the motor 401, and a sleeve 404 is threadedly connected to the screw rod 402. A graphite lubricating layer is provided between the screw rod 402 and the sleeve 404. The sleeve 404 is telescopically driven by the thread of the screw rod 402. A guide head 405 is provided at the end of the sleeve 404. After the guide sleeve 6 is docked with the lock seat 1, the sleeve 404 of the second action module 4 passes through the guide sleeve 6 and is inserted into the lock seat 1.

[0032] Embodiment 2: In order to enable the lock seat 1 to compensate for the material expansion caused by temperature changes, for example, Figures 1 to 6As shown, the present invention also includes: the lock seat 1 is provided with a socket 101, and a fixing plate 102 is provided on both sides of the socket 101. The fixing plate 102 is provided with a fixing hole 103, and the socket 101 is provided with a plug hole 104. The shell 5 and the lock seat 1 are made of aluminum alloy, and an anti-oxidation coating is provided on the surface. The fixing plate 102 is fixed to the cabinet by stainless steel bolts, and an elastic rubber gasket is provided in the fixing hole 103 to compensate for the material expansion caused by temperature changes. Aluminum alloy has the advantages of low density, high strength, and good thermal conductivity. The shell 5 and the lock seat 1 are made of aluminum alloy, which can reduce the weight of the lock while ensuring the structural strength of the lock, and is easy to install and use. The anti-oxidation coating on the surface can prevent the aluminum alloy from chemically reacting with oxygen, moisture, etc. in the air and rusting and corroding, thereby extending the service life of the shell 5 and the lock seat 1. The fixing plate 102 is fixed to the cabinet by stainless steel bolts. Stainless steel has good corrosion resistance and can maintain stable performance under different environmental conditions, avoiding the problem of loose connection caused by rust and corrosion of the bolts, and ensuring the firmness of the lock installation. The elastic rubber gasket in the fixing hole 103 is elastic. When the ambient temperature changes, the expansion coefficients of different materials are different, and the aluminum alloy shell 5 and the lock seat 1, the cabinet and the stainless steel bolts and other components will expand or shrink to different degrees. The elastic rubber gasket can compensate for the material expansion difference caused by the temperature change through its own elastic deformation, avoid the stress concentration caused by the inconsistent material expansion, prevent the damage of the components or the loose connection, and ensure the stability and reliability of the lock in different temperature environments. The sliding sleeve 404 and the guide sleeve 6 of the second action module 4 are inserted into the socket 104 of the lock seat 1. The aperture of the socket 104 is larger than the diameter of the sleeve 603. When the sleeve 603 and the socket 104 are misaligned, the sleeve 603 is inserted into the socket 104 through the interaction between the guide inclined surface 604 and the socket 104. The aperture of the socket 104 is larger than the diameter of the sleeve 603, which provides a certain fault tolerance space for the insertion of the sleeve 603 into the socket 104. During the actual installation and use process, due to the influence of various factors, the axis of the sleeve 603 and the socket 104 may be misaligned to a certain extent. When this happens, the guide bevel 604 at the end of the sleeve 603 comes into play. After the guide bevel 604 contacts the edge of the socket 104, under the interaction between the two, according to the principle of force decomposition, a component force will be generated to move the sleeve 603 toward the axis of the socket 104. As the sleeve 603 continues to advance, this component force will continuously adjust the position of the sleeve 603, so that the sleeve 603 gradually aligns with the axis of the socket 104, and finally smoothly inserts into the socket 104. This design reduces the requirements for the alignment accuracy of the axis of the sleeve 603 and the socket 104 during installation and use, improves the installation convenience and practicality of the lock, and ensures the normal operation of the lock even in the presence of certain installation errors.

[0033] Working principle: The cabinet door lock is mainly composed of a housing 5, a lock seat 1, a first action module 3, a second action module 4 and a guide sleeve 6. The housing 5 and the lock seat 1 are made of aluminum alloy and have an anti-oxidation coating on the surface. The anti-oxidation coating can prevent the aluminum alloy from oxidizing and extend its service life. The aluminum alloy itself has good heat dissipation and helps to cope with high temperature environments. The lock seat 1 is fixed to the cabinet body with stainless steel bolts through the fixing holes 103 on the fixing plate 102. The elastic rubber gasket in the fixing hole 103 can compensate for the expansion or contraction of the material when the temperature changes, avoiding loose installation due to structural deformation caused by temperature.

[0034] A magnetic isolation plate 2 is installed between the housing 5 and the first action module 3 to prevent the magnetic field generated by the first action module 3 from having adverse effects on the housing 5 and other components. A heat insulation layer is provided between the motor 401 of the second action module 4 and the housing 5. The heat insulation layer is an aerogel insulation pad, which reduces the transfer of heat generated by the motor 401 to the housing 5, prevents the housing 5 from failing due to high-temperature expansion, and ensures the stability of the lock in a high-temperature environment.

[0035] The first action module 3 is provided with an electromagnet 304 and a permanent magnet 303. When the door needs to be locked, the electromagnet 304 is energized, and the electromagnet 304 generates a magnetic field that interacts with the permanent magnet 303, pushing the permanent magnet 303 to move. The permanent magnet 303 drives the connecting plate 301 to move through the connecting shaft 302. The connecting plate 301 is installed on the mounting plate 601 of the guide sleeve 6, thereby pushing the mounting plate 601 to move. When the mounting plate 601 moves, the spring 602 pushes the sleeve 603, so that the guide sleeve 6 moves toward the lock seat 1 and docks with it. Here, the spring 602 plays the role of buffering and transmitting power, and can adapt to certain installation errors and slight deviations when components move.

[0036] After the guide sleeve 6 is docked with the lock seat 1, the second action module 4 starts to work. The motor 401 is started, driving the screw rod 402 at its output end to rotate. The screw rod 402 is threadedly connected to the sleeve 404, and a graphite lubricating layer is provided between the screw rod 402 and the sleeve 404. The graphite lubricating layer can maintain good lubrication performance at different temperatures, ensuring that the screw rod 402 can smoothly drive the sleeve 404 to move telescopically when rotating. The sleeve 404 is driven by the thread of the screw rod 402, moves forward along the limit groove 501 in the housing 5 (the limit rod 403 on the sleeve 404 cooperates with the limit groove 501 to achieve limit), passes through the guide sleeve 6 and is inserted into the jack 104 of the lock seat 1 to complete the locking action. The sleeve 603 is installed on the sleeve 404 through the second slide groove 605 and the limit rod 403 on the sleeve 404, which ensures the stability and accuracy of the movement of the sleeve 603. When there is misalignment between the sleeve 603 and the jack 104 axis, the guide slope 604 at the end of the sleeve 603 interacts with the jack 104, so that the sleeve 603 can automatically adjust its position and be smoothly inserted into the jack 104, thereby achieving adaptive docking.

[0037] When unlocking is required, the energized state of the electromagnet 304 is changed to generate a magnetic field opposite to the previous one, interacting with the permanent magnet 303 to pull the permanent magnet 303 to move in the opposite direction. The permanent magnet 303 drives the connecting plate 301 to move in the opposite direction through the connecting shaft 302, thereby moving the guide sleeve 6 away from the lock seat 1, and releasing the docking between the guide sleeve 6 and the lock seat 1.

[0038] At the same time, the motor 401 rotates in the reverse direction, driving the screw rod 402 to rotate in the opposite direction, causing the sleeve 404 to retract backward along the screw rod 402 thread drive and withdraw from the insertion hole 104 of the lock seat 1, completing the unlocking process. During the whole process, the graphite lubricating layer between the screw rod 402 and the sleeve 404 still plays a role, ensuring the smooth unlocking action at different temperatures.

[0039] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached 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 are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] 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 cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, comprising a housing (5), a lock seat (1) being installed on one side of the housing (5), and a second action module (4) being installed inside the housing (5), characterized in that: The output end of the second action module (4) is sleeved with a guide sleeve (6); the first action module (3) is installed on the outer side of the housing (5); a magnetic isolation plate (2) is installed between the housing (5) and the first action module (3); the first action module (3) is transmission-connected to the guide sleeve (6); the guide sleeve (6) is driven by the first action module (3) to dock with the lock seat (1); the second action module (4) is provided with a motor (401); and the output end of the motor (401) is provided with A screw rod (402), a sleeve (404) is threadedly connected to the screw rod (402), a graphite lubricating layer is provided between the screw rod (402) and the sleeve (404), the sleeve (404) is telescopically moved by the thread drive of the screw rod (402), a guide head (405) is provided at the end of the sleeve (404), and after the guide sleeve (6) is docked with the lock seat (1), the sleeve (404) of the second action module (4) passes through the guide sleeve (6) and is inserted into the lock seat (1); The lock seat (1) is provided with a socket (101), and fixing plates (102) are provided on both sides of the socket (101), and fixing holes (103) are provided through the fixing plates (102). The socket (101) is provided with a plug hole (104), and the sliding sleeve (404) and the guide sleeve (6) of the second action module (4) are inserted into the plug hole (104) of the lock seat (1).

2. According to claim 1, a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, characterized in that: The first action module (3) is provided with an electromagnet (304), a permanent magnet (303) is installed on one side of the electromagnet (304), a connecting shaft (302) is connected to the permanent magnet (303), and a connecting plate (301) is installed on the connecting shaft (302).

3. According to claim 2, a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, characterized in that: The guide sleeve (6) is provided with a mounting plate (601), the connecting plate (301) is mounted on the mounting plate (601), a spring (602) is mounted on one side of the mounting plate (601), a sleeve (603) is mounted on one end of the spring (602) away from the mounting plate (601), a guide inclined surface (604) is provided at the end of the sleeve (603), and a second slide groove (605) is provided through the sleeve (603).

4. According to claim 3, a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, characterized in that: The sleeve (603) is mounted on the sliding sleeve (404) by cooperating with the limiting rod (403) through the second sliding groove (605).

5. According to claim 1, a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, characterized in that: A limiting groove (501) is provided in the housing (5), and the sliding sleeve (404) is installed in the housing (5) by means of a limiting rod (403) and the limiting groove (501) cooperating with each other in a limiting manner.

6. According to claim 1, a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, characterized in that: The aperture of the insertion hole (104) is larger than the diameter of the sleeve (603). When the sleeve (603) and the insertion hole (104) are axially misaligned, the sleeve (603) is inserted into the insertion hole (104) through the interaction between the guiding inclined surface (604) and the insertion hole (104).

7. According to claim 1, a cabinet door lock that is adaptive to temperature changes and prevents low-temperature jamming and high-temperature expansion failure, characterized in that: When the first action module (3) pushes the mounting plate (601) to move, the mounting plate (601) pushes the sleeve (603) via the spring (602).

8. According to claim 1, a cabinet door lock capable of adaptively adapting to temperature changes and preventing low-temperature jamming and high-temperature expansion failure, characterized in that: A heat insulation layer is provided between the motor (401) and the housing (5); the heat insulation layer is an aerogel heat insulation pad; the aerogel heat insulation pad has a porous network structure formed by nano-scale silica particles, a porosity of ≥95%, and a thermal conductivity of ≤0.015 W / (m·K); the heat insulation layer forms a heat blocking interface with the motor (401) housing and the inner wall of the housing (5) via an adhesive; the thickness of the heat insulation layer is 2-3 mm.

9. According to claim 1, a cabinet door lock capable of adaptively adapting to temperature changes and preventing low-temperature jamming and high-temperature expansion failure, characterized in that: The housing (5) and the lock seat (1) are made of aluminum alloy and provided with an anti-oxidation coating on the surface. The fixing plate (102) is fixed to the cabinet body by means of stainless steel bolts. An elastic rubber gasket is provided in the fixing hole (103) to compensate for material expansion caused by temperature changes.

Images