Lockset for secondary protection of cover plate of air conditioning unit and air conditioning unit

Abstract

The utility model relates to an air conditioning unit cover plate secondary protection lockset and air conditioning unit, the lockset comprises a lock body and a lock tongue, the lock body drives the lock tongue to switch between a locking state and an unlocking state, the lock tongue is composed of a fixed lock tongue and a movable lock tongue, one end of the fixed lock tongue is fixedly connected with the lock body, and the other end of the fixed lock tongue is fixedly connected with the movable lock tongue. The other end of the fixed spring bolt is rotationally connected with the movable spring bolt through a one-way rotating structure, and the one-way rotating structure is configured to enable the movable spring bolt to rotate in the cover plate buckling process. And under the action of the shell limiting piece, the rotating shaft rotates upwards from the initial position until the rotating shaft crosses the shell limiting piece, then returns to the initial position and is limited below the shell limiting piece. According to the utility model, automatic locking can be realized, manual intervention is not needed, manual operation is needed for opening, the safety is high, the risk of misoperation and operation leakage is greatly reduced, and the use is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of lock technology, in particular to a lock for secondary protection of a cover plate of an air-conditioning unit and an air-conditioning unit. Background Art

[0002] Urban rail vehicles typically have two air conditioning units per passenger compartment. These units typically utilize a modular design and are mounted on the roof of the vehicle. The units consist of a housing housing the evaporator, evaporator fan, electric heater, condenser, condenser fan, compressor, and other components. To facilitate routine maintenance, a retractable cover is typically installed on the top panel of the housing. Due to the high speeds and complex operating environments of rail vehicles, the cover must remain secure and reliable throughout operation to prevent potential hazards.

[0003] Currently, a secondary protection device is provided between the top cover and the shell of the air-conditioning unit. When the fixing method between the top cover and the shell fails or is removed, the device can temporarily tighten and protect the top cover.

[0004] Conventional secondary protection methods for the top cover of air conditioner units mainly include the use of hooks and latches, but the currently used protection structures each have different disadvantages, as follows:

[0005] The hook method takes up a large amount of space inside the air conditioner. The top cover needs to be opened to a certain angle, and then the operator needs to reach into the bottom of the top cover to touch the hook handle before the operation can be carried out. The handle is located deep and cannot be seen. It is very difficult for maintenance personnel with a fat body to reach out and operate. At the same time, the hook method also has requirements for the installation direction. The handle must be set near the edge of the top cover to operate. Although the structure is simple, the operation is relatively difficult.

[0006] The latch method requires manual operation and is prone to operator omissions. In addition, the overlap size is small, which makes it easy for the latch to fail or cause scratching and interference when opening. It occupies a large space on the side panels of the beam, compresses the maintenance space of the top cover, and affects the maintenance of internal components. Utility Model Content

[0007] The main technical problem solved by the utility model is to provide a secondary protection lock for the cover of the air-conditioning unit which can realize automatic locking and requires manual opening, thereby effectively avoiding missed operation and wrong operation, and using a safe and reliable secondary protection lock for the air-conditioning unit. At the same time, an air-conditioning unit using the secondary protection lock is provided.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A lock for secondary protection of the cover of an air-conditioning unit comprises a lock body and a lock tongue. The lock body drives the lock tongue to switch between a locked state and an unlocked state. The lock tongue consists of a fixed lock tongue and a movable lock tongue. One end of the fixed lock tongue is fixedly connected to the lock body, and the other end of the fixed lock tongue is rotatably connected to the movable lock tongue through a one-way rotation structure. The one-way rotation structure is configured so that the movable lock tongue rotates upward from an initial position under the action of a shell limit member during the cover fastening process until it passes over the shell limit member and then returns to the initial position and is restricted below the shell limit member.

[0010] Furthermore, the one-way rotation structure includes a rotating shaft and a limiting structure arranged between the movable lock tongue and the fixed lock tongue for limiting the initial position of the movable lock tongue.

[0011] Furthermore, the limiting structure is a protruding portion extending from the end surface of the movable lock tongue toward the fixed lock tongue. In the initial position, the end surface of the protruding portion of the movable lock tongue is in contact with the end surface of the fixed lock tongue.

[0012] Furthermore, a return spring is installed between the fixed lock tongue and the movable lock tongue. The return spring is compressed during the buckling process, and the movable lock tongue is reset to its initial position after the buckling is in place.

[0013] Furthermore, the return spring and the torsion spring are sleeved on the rotating shaft.

[0014] Furthermore, a limiting portion bent in the rotation direction is provided at the outer end portion of the movable lock tongue. After the cover is buckled into place, the housing limiting member is restricted in the limiting portion.

[0015] Furthermore, the limiting portion is integrally formed by tilting the edge of the movable lock tongue body upward, and the tilt angle of the limiting portion relative to the body is 100-170°.

[0016] Furthermore, the inclination angle of the limiting portion relative to the main body is 135°.

[0017] Furthermore, the initial position of the movable lock tongue is that the main body of the movable lock tongue and the fixed lock tongue are on the same plane.

[0018] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0019] An air-conditioning unit comprises a shell and a cover plate, wherein the cover plate is fixed to the shell by a locking device, a shell limiter is provided on the shell, and the cover plate and the shell limiter are also connected by the air-conditioning unit cover plate secondary protection lock as described above.

[0020] In summary, the air-conditioning unit cover secondary protection lock and air-conditioning unit provided by the present invention have the following advantages over the prior art:

[0021] (1) The utility model can realize automatic locking without manual intervention, and requires manual operation to open, which is highly safe and greatly reduces the risk of misoperation and missed operation, making it safe and reliable to use.

[0022] (2) The present invention can be modified on the basis of the structure of the existing tension lock, and utilizes the waterproof and locking structure of the tension lock, which has high reliability and compact size. It is similar in size to conventional tension locks on the market and does not occupy internal space. It is suitable for air-conditioning units with high space requirements and is convenient for the layout of internal components.

[0023] (3) All operating parts of the utility model are visible, which is convenient for workers to operate manually without groping. The operation is more humane, safer and more reliable.

[0024] The specific implementation of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are part of this utility model and are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0026] In the attached figure:

[0027] Figure 1 This is a schematic diagram of the structure of the utility model lock;

[0028] Figure 2 This is a schematic diagram of the structure of the utility model lock (without the lock shell);

[0029] Figure 3 This is a schematic diagram of the structure of the utility model lock when viewed from above;

[0030] Figure 4 This is a schematic diagram of the structure of the utility model lock when it is buckled;

[0031] Figure 5 It is a structural schematic diagram of the utility model lock after being buckled into place.

[0032] In the picture:

[0033] Lock housing 1, locking device 2, sleeve 21, spiral groove 22, limiting shaft 23, spring 24, lock cylinder 3, key block 31, sealing portion 32, transmission rod 33, lock tongue 4, fixed lock tongue 41, movable lock tongue 42, main body 421, limiting portion 43, mounting hole 5, bolt 6, one-way rotation structure 7, rotating shaft 71, limiting structure 72, protruding portion 721, housing limiting member 8, return spring 9, torsion spring 91.

[0034] It should be noted that the drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0038] like Figures 1 to 5 As shown, the utility model provides a lock for secondary protection of the cover of an air-conditioning unit, which is installed on the air-conditioning unit. The air-conditioning unit includes a shell and a cover. One side of the cover is rotatably connected to the shell by a hinge, and the other side of the cover is locked and fixed by a locking device. A limiting member 8 is also provided on the shell. The limiting member 8 is a limiting plate or a limiting rod fixed on the shell of the air-conditioning unit. In this embodiment, the limiting member 8 preferably adopts a limiting rod. The cover and the shell limiting member 8 are also connected and cooperated by the lock to realize secondary protection of the cover of the air-conditioning unit, so as to avoid the temporary tightening and protection of the cover by using the lock when the locking device fails.

[0039] like Figures 1 to 3 As shown, in this embodiment, the air conditioning unit cover secondary protection lock comprises a lock body and a lock tongue 4, and the lock body drives the lock tongue 4 to switch between a locked state and an unlocked state. The lock body can adopt the lock body of the tension lock in the prior art.

[0040] In this embodiment, the lock body includes a lock housing 1, a locking device 2, and a lock cylinder 3. The lock housing 1 is provided with a mounting hole 5, into which the lock cylinder 3 is mounted. A lock tongue 4 is provided on one side of the bottom of the lock body. The locking device 2 is provided between the lock cylinder 3 and the lock tongue 4. The lock tongue 4 is switched between a locked state and an unlocked state by operating the locking device 2.

[0041] Among them, the top of the lock core 3 is provided with a key block 31, the key block 31 connects the sealing part 32 and the transmission rod 33, the sealing part 32 includes a plurality of sealing grooves and a sealing ring (not marked in the figure) installed in the sealing groove. The sealing ring cooperates with the lock shell 1 to achieve the sealing of the lock, preventing dust and rainwater from entering the lock shell 1 along the top position of the lock shell 1, thereby playing a role of waterproof sealing.

[0042] In this embodiment, the locking device 2 includes a sleeve 21, a transmission rod 33 of the lock cylinder 3 is placed within the sleeve 21, a spiral groove 22 is provided around the periphery of the sleeve 21, and an outwardly protruding limit shaft 23 is provided on the transmission rod 33 of the lock cylinder 3. The end of the limit shaft 23 is inserted into the spiral groove 22, and the spiral groove 22 defines the movement trajectory of the limit shaft 23 as it rotates with the key block 31. A spring 24 is provided within the sleeve 21, one end of the spring 24 abuts against the bottom end of the transmission rod 33, and the other end of the spring 24 is connected to the bottom of the sleeve 21. A downwardly protruding mounting block (not shown) is provided at one end of the sleeve 21 corresponding to the lock tongue 4. One end of the lock tongue 4 is sleeved on the mounting block and fixedly connected to the mounting block by a bolt 6.

[0043] The operator uses a key to engage the key block 31, applying torque to the key block 31, which drives the bottom lock tongue 4 to switch between the locked and unlocked states. Simultaneously, the limit shaft 23 slides within the spiral chute 22, moving between the unlocked and locked ends. In this embodiment, the locked state (i.e., the state that serves as a secondary protection) is when the spring 24 is in its natural state. In the unlocked state, the key applies torque to the key block 31, causing the limit shaft 23 to slide within the spiral chute 22 from the locked end to the unlocked end. At this time, the spring 24 is in a contracted state. After the secondary protection is released and the key stops applying torque to the key block 31, the spring 24 automatically returns the lock tongue 4 to its locked position under the elastic force of the spring 24, preparing for the next secondary protection after the cover is engaged. This eliminates the need for manual adjustment of the lock to the locked state, preventing missed or erroneous operations. Furthermore, because the lock is operated using a key at the top of the lock, all operating components are visible, making manual operation easier and more user-friendly.

[0044] like Figures 1 to 5 As shown, in this embodiment, the lock tongue 4 consists of a fixed lock tongue 41 and a movable lock tongue 42. One end of the fixed lock tongue 41 is fixedly connected to the mounting block in the locking device 2, and the other end of the fixed lock tongue 41 is rotatably connected to the movable lock tongue 42 via a one-way rotation structure 7. The one-way rotation structure 7 is configured so that the movable lock tongue 42 can only be rotated upward from its initial position (i.e., rotated in a direction away from the engagement) and then returned to the initial position, but cannot be rotated downward from the initial position. In this initial position, the main body 42a of the movable lock tongue 42 and the fixed lock tongue 41 are on the same horizontal plane.

[0045] When the locking device 2 is in the locked state, the movable lock tongue 42 rotates upward from the initial position until it passes the shell limiter 8 under the action of the shell limiter 8 during the process of the cover being buckled downward. After passing the shell limiter 8, it returns to the initial position and is placed below the shell limiter 8, being restricted below the shell limiter 8. Since the movable lock tongue 42 cannot rotate downward from the initial position, if the cover is subjected to an upward force at this time, the movable lock tongue 42 will be stuck below the shell limiter 8, and the cover will not be opened, thereby achieving the secondary protection locking of the cover. Only when the operator manually operates the locking device 2 and rotates the lock tongue 4 to the unlocked state can the lock tongue 4 be disengaged from the shell limiter 8, releasing the secondary protection lock. At this time, the locking device between the shell and the cover can be opened to open the cover.

[0046] In this embodiment, the one-way rotation structure 7 preferably includes a rotating shaft 71 and a limiting structure 72 disposed between the movable lock tongue 42 and the fixed lock tongue 41 for limiting the initial position of the movable lock tongue 42. The one-way rotation structure 7 allows the movable lock tongue 42 to rotate under force to avoid the housing limiter 8 when the lock is naturally lowered (i.e., the cover is buckled downward). When the lock is lifted, the limiting effect is achieved, preventing the movable lock tongue 42 from rotating in the opposite direction, thereby preventing the cover from being opened.

[0047] like Figure 3 As shown, in this embodiment, it is further preferred that the limiting structure 72 is a protrusion 421 extending from the end surface of the movable lock tongue 42 toward the fixed lock tongue 41. In the initial position, the end surface of the protrusion 421 of the movable lock tongue 42 abuts against the end surface of the fixed lock tongue 41. This prevents the movable lock tongue 42 from further rotating downward, preventing the movable lock tongue 42 from excessively rotating and causing the movable lock tongue 42 to escape from the restriction between the housing limiter 8.

[0048] In this embodiment, a return spring 9 is installed between the fixed lock tongue 41 and the movable lock tongue 42. More preferably, the return spring 9 is a torsion spring 91, which is mounted on the rotating shaft 71. The rotating shaft 71 and the torsion spring 91 are both mounted on the upper surfaces of the movable lock tongue 42 and the fixed lock tongue 41. The ends of the torsion spring 91 are respectively connected to the upper surfaces of the movable lock tongue 42 and the fixed lock tongue 41. The return spring 9 is compressed during the buckling process of the cover. After the cover is buckled into place, the return spring 9 returns the movable lock tongue 42 to its initial position.

[0049] In this embodiment, preferably, a limit portion 43 is provided at the outer end of the movable lock tongue 42, which is bent in the direction of rotation (i.e., upward). Furthermore, the limit portion 43 is formed integrally with the edge of the main body 42a of the movable lock tongue 42, which is tilted upward. After the cover is buckled into place, the housing limit member 8 is confined within the limit portion 43. The limit portion 43 is a structure formed by bending the main body 42a of the movable lock tongue 42 outward. This not only serves to limit the housing limit member 8, but also helps to reduce the rotation angle of the movable lock tongue 42 over the housing limit member 8, allowing the movable lock tongue 42 to quickly cross the housing limit member 8 within the range of travel of the cover being buckled to achieve locking.

[0050] In this embodiment, it is further preferred that the inclination angle of the limiting portion 43 relative to the main body 42a of the movable locking tongue 42 is 100-170°, and even more preferably, the inclination angle of the limiting portion 43 relative to the main body 42a is 135°.

[0051] like Figures 1 to 5 As shown, the lock provided by the utility model has the following operating principles when locked:

[0052] 1. The initial state of the lock tongue 4 is the locked state, the spring 24 in the lock body is in a naturally relaxed state, and the movable lock tongue 42 in the lock tongue 4 is in a horizontal initial position.

[0053] 2. When the cover is buckled downward, the lock moves downward together with it. During this process, the movable lock tongue 42 is supported from bottom to top by the shell limiter 8, and the movable lock tongue 42 is in a state of being forced to rotate upward until the movable lock tongue 42 passes over the shell limiter 8 and is placed below the shell limiter 8.

[0054] 3. At this time, if the lock is lifted upward again (i.e., the cover is opened upward), the movable lock tongue 42 cannot rotate downward under the action of the limiting structure 72, ensuring that the movable lock tongue 42 remains in the horizontal state of the initial position. The movable lock tongue 42 cannot pass through the shell limiting member 8 again, thereby achieving secondary protection of the cover.

[0055] 4. If you want to open the cover, the operator needs to manually use the key to apply torque to the key block 31 on the top of the lock. The limit shaft 23 slides from the locked end to the unlocked end in the spiral slide groove 22, and the lock tongue 4 also turns in the horizontal plane from the locked state to the unlocked state. At this time, the lock tongue 4 avoids the shell limit member 8, realizing the unlocking of the secondary protection.

[0056] 5. During this unlocking process, the spring 24 is in a contracted state. After the secondary protection is released, when the key stops applying torque to the key block 31, the lock tongue 4 automatically returns to the locked position under the elastic force of the spring 24, preparing for the secondary protection after the cover is buckled next time.

[0057] The secondary protection lock for the air-conditioning unit cover provided by the utility model has the following advantages:

[0058] 1. The lock can be locked automatically without manual intervention. It needs manual operation to open. It has high security and greatly reduces the risk of misoperation and missed operation. It is safe and reliable to use.

[0059] 2. This lock can be modified on the basis of the existing tension lock structure, utilizing the waterproof and locking structure of the tension lock. It has high reliability and compact size, which is similar to the size of conventional tension locks on the market. It does not occupy internal space and is suitable for air-conditioning units with high space requirements, facilitating the layout of internal components.

[0060] 3. If the locking device between the cover and the shell uses a tension lock, the lock can use the same specification key of the tension lock without replacing special tools, which is simple and convenient to operate.

[0061] 4. The lock has a flexible position in the rail air-conditioning unit and is not affected by the installation direction. The installation position can be flexibly adjusted according to the internal layout of the air-conditioning unit.

[0062] 5. All operating parts of the lock are visible, which is convenient for staff to operate manually without groping. The operation is more humane, safer and more reliable.

[0063] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments with equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A lock for secondary protection of an air conditioning unit cover, comprising a lock body and a lock tongue, wherein the lock body drives the lock tongue to switch between a locked state and an unlocked state, characterized in that: The lock tongue consists of a fixed lock tongue and a movable lock tongue. One end of the fixed lock tongue is fixedly connected to the lock body, and the other end of the fixed lock tongue is rotatably connected to the movable lock tongue through a one-way rotation structure. The one-way rotation structure is configured so that the movable lock tongue rotates upward from the initial position under the action of the shell limiter until it passes the shell limiter and then returns to the initial position and is restricted below the shell limiter during the cover plate fastening process.

2. The secondary protection lock for the air conditioning unit cover according to claim 1, characterized in that: The one-way rotation structure includes a rotating shaft and a limiting structure arranged between the movable lock tongue and the fixed lock tongue for limiting the initial position of the movable lock tongue.

3. The secondary protection lock for the air conditioning unit cover according to claim 2, characterized in that: The limiting structure is a protruding portion extending from the end surface of the movable lock tongue toward the fixed lock tongue. In the initial position, the end surface of the protruding portion of the movable lock tongue abuts against the end surface of the fixed lock tongue.

4. The secondary protection lock for the air conditioning unit cover according to claim 2, characterized in that: A return spring is installed between the fixed lock tongue and the movable lock tongue. The return spring is compressed during the buckling process, and the movable lock tongue is reset to the initial position after the buckling is in place.

5. The secondary protection lock for the air conditioning unit cover according to claim 4, characterized in that: The return spring and the torsion spring are sleeved on the rotating shaft.

6. The secondary protection lock for the air conditioning unit cover according to claim 1, characterized in that: The outer end portion of the movable lock tongue is provided with a limiting portion bent in the rotation direction. After the cover plate is buckled into place, the housing limiting member is restricted in the limiting portion.

7. The secondary protection lock for the air conditioning unit cover according to claim 6, characterized in that: The limiting portion is integrally formed by tilting the edge of the movable lock tongue body upward, and the tilt angle of the limiting portion relative to the body is 100-170 degrees.

8. The secondary protection lock for the air conditioning unit cover according to claim 7, characterized in that: The inclination angle of the limiting portion relative to the main body is 135°.

9. The secondary protection lock for the air conditioning unit cover according to claim 1, characterized in that: The initial position of the movable lock tongue is that the main body of the movable lock tongue and the fixed lock tongue are on the same plane.

10. An air conditioning unit comprising a housing and a cover plate, wherein the cover plate is fixed to the housing by a locking device, characterized in that: A housing limiter is provided on the housing, and the cover plate and the housing limiter are further connected via the air-conditioning unit cover plate secondary protection lock according to any one of claims 1 to 9.

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