Self-locking device for rail transit air conditioning unit

Abstract

The utility model relates to a self-locking device for a rail transit air conditioning unit. The self-locking device comprises a blocking piece and a self-locking part. The self-locking part comprises a spring bolt, the spring bolt comprises a diagonal plane and a fixed surface which are connected with each other, and the spring bolt can stretch out and draw back elastically; the separation blade comprises an inclined flange, and the inclined flange is matched with the inclined angle of the diagonal plane of the spring bolt; when the device is self-locked, the inclined turnup slides and extrudes along the diagonal plane to enable the spring bolt to retract, the spring bolt rebounds and resets after the spring bolt is separated from the diagonal plane, and the fixed surface covers the end part of the inclined turnup to form locking. The inclined flanging of the self-locking device is matched with the inclined angle of the diagonal plane of the spring bolt, so that the self-locking process is smooth and efficient; after the spring bolt rebounds and resets, the fixed surface of the spring bolt can cover the end part of the inclined flange to form a stable locking state, so that the reliability of the self-locking device is improved; meanwhile, the separation blade and the self-locking part are matched for self-locking, so that the structure of the self-locking device is simplified, the self-locking device is light, thin and durable, and the production and maintenance cost of the self-locking device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit, and in particular to a self-locking device for a rail transit air conditioning unit. BACKGROUND

[0002] After undergoing maintenance, the air conditioning unit of a rail vehicle may occasionally leak the locking of the cover plate, which may cause the serious accident of accidental shedding of the top cover during the running of the vehicle, directly threatening the safety of the running and the life safety of passengers.

[0003] In view of this, some air conditioning units are currently equipped with self-locking devices, which are designed to automatically realize the locking function when the cover plate is closed after maintenance. However, these self-locking devices are in a harsh working environment and need to withstand frequent opening and closing operations, and the existing devices generally have the problems of complex structure and insufficient self-locking stability.

[0004] Therefore, there is an urgent need in the industry for a new self-locking device that is simple in design, light and thin, and has higher self-locking reliability. The device needs to better ensure its self-locking performance in complex working conditions, thereby ensuring the safe operation of the rail vehicle. CONTENT OF THE INVENTION

[0005] The present application at least solves one of the technical problems in the related art to some extent, and provides a self-locking device for a rail transit air conditioning unit, which is simple in structure, smooth and efficient in self-locking process, and high in self-locking reliability.

[0006] To achieve the above-mentioned purpose, the present application provides a self-locking device for a rail transit air conditioning unit, which comprises a baffle and a self-locking part; the self-locking part comprises:

[0007] the locking tongue comprises a beveled surface and a fixed surface connected thereto, and the locking tongue is elastically extensible and retractable;

[0008] the baffle comprises:

[0009] the beveled edge matches the inclination angle of the beveled surface;

[0010] When the device is self-locked, the beveled edge slides and extrudes along the beveled surface to retract the locking tongue, and the locking tongue is reset after being out of contact, and the fixed surface covers the end of the beveled edge to form locking.

[0011] The inclination angle of the beveled edge matches that of the beveled surface of the locking tongue, so that the self-locking process is smooth and efficient; after the locking tongue is reset, the fixed surface can cover the end of the beveled edge to form a stable locking state, thereby improving the reliability of the self-locking device; at the same time, the baffle is used in cooperation with the self-locking part for self-locking, which simplifies the structure of the self-locking device, makes the self-locking device light and thin, and reduces the production and maintenance costs.

[0012] In some embodiments of the present application, the air conditioning unit comprises a shell and a cover plate, the self-locking part and the blocking piece are respectively installed on the shell and the cover plate, and the locking between the shell and the cover plate is realized through the self-locking device.

[0013] By setting the self-locking device, the accidental opening of the cover plate due to the bumping and vibration of the rail vehicle during the operation of the rail transit can be avoided, and the safety of the equipment operation is ensured.

[0014] In some embodiments of the present application, the blocking piece comprises a body and a fixed edge connected perpendicularly to the body, the fixed edge comprises a mounting hole, the blocking piece is fixed to the cover plate through the mounting hole, and the inclined flange is connected to the body and the fixed edge respectively.

[0015] This structure can increase the strength of the blocking piece, keep the structure stable during the locking and unlocking of the device, and prevent deformation, so as to ensure the reliable performance of the self-locking device.

[0016] In some embodiments of the present application, the blocking piece comprises a reinforcing edge arranged on the opposite side of the inclined flange, and the reinforcing edge is connected perpendicularly to the body and the fixed edge respectively.

[0017] This structure has a stable supporting function, which makes the blocking piece better disperse stress, reduces the possibility of deformation and damage, and improves the durability and reliability of the blocking piece when it is subjected to the extrusion force of the locking tongue and other external forces.

[0018] In some embodiments of the present application, the self-locking device comprises a mounting block, opposite surfaces of the mounting block are connected to the self-locking part and the shell respectively, and the beveled surface of the locking tongue exceeds the edge of the mounting block when the locking tongue is reset.

[0019] The increase of the mounting block improves the installation height of the self-locking part, so that there is no need to additionally open a space for accommodating the blocking piece on the shell of the unit, and the structure of the self-locking device is simplified.

[0020] In some embodiments of the present application, the height of the mounting block is slightly greater than the height of the inclined flange.

[0021] At this time, the body of the blocking piece can be closely attached to the shell of the air conditioning unit, and this attachment mode can effectively disperse the external force borne by the blocking piece, avoid deformation or damage due to excessive local stress, and at the same time, the end of the inclined flange can abut against the fixed surface of the locking tongue, and the two form a stable mechanical constraint, which ensures the stable state of the blocking piece.

[0022] In some embodiments of the present application, the self-locking part comprises a cover, the cover comprises a shell cavity accommodating a lock tongue, the shell cavity comprises opposite first and second ends; the lock tongue comprises a head portion and a tail portion, the head portion is located near the first end, and the tail portion is located near the second end; the shell cavity has openings at the first and second ends, the head portion can be extended and retracted through the first end opening, and the tail portion can be extended and retracted through the second end opening; an elastic member is arranged between the first and second ends, and the two ends of the elastic member are fixed to the lock tongue and the cover respectively.

[0023] The design of the openings at the two ends of the shell cavity allows the lock tongue to move flexibly and smoothly without being limited by space, and the lock tongue can quickly and accurately complete the action during the extrusion and retraction of the blocking piece or the reset process, thereby greatly improving the response speed and working efficiency of the self-locking device.

[0024] In some embodiments of the present application, the tail portion has a reduced radial dimension relative to the head portion, the elastic member is a spring sleeved on the tail portion, the spring is limited between the variable-diameter portion and the second end, the beveled surface and the fixing surface are located on the head portion, when the lock tongue retracts, the head portion retracts and compresses the spring through the first end opening, and the tail portion extends through the second end opening, and when the lock tongue rebounds, the spring rebounds and drives the head portion to extend through the first end opening and the tail portion to retract through the second end opening.

[0025] The variable-diameter structure of the lock tongue is used to accurately position the spring, and no additional fixing device is needed, thereby simplifying the structure of the self-locking part.

[0026] In some embodiments of the present application, the lock tongue comprises a handle portion connected to the head portion, and the cover is provided with an opening; the handle portion extends out of the cover through the opening, and the handle portion is arranged in a direction perpendicular to the connecting surface of the mounting block and the shell.

[0027] The perpendicular arrangement conforms to the principle of ergonomics, and is more convenient for operators to grasp and apply force than the parallel arrangement to the shell.

[0028] In some embodiments of the present application, the mounting block is welded to the shell; the mounting block has a threaded hole, the cover has a threaded hole matched with the position of the threaded hole of the mounting block, and the cover and the mounting block are connected by a screw.

[0029] Welding can make the mounting block and the shell form a stable combination, so as to ensure that the mounting block does not loosen or fall off the shell; the screw is used to connect the mounting block and the cover, which facilitates installation and disassembly and improves the efficiency of installation and maintenance work.

[0030] The above description is only a summary of the technical solutions of the present disclosure. In order to enable a clearer understanding of the technical means of the present disclosure, the contents of the description can be implemented, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more apparent and easy to understand, the specific embodiments of the present disclosure are described below. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0032] Figure 1 is an axonometric view of a self-locking device according to an embodiment of the present application;

[0033] Figure 2 is a front view of a self-locking device according to an embodiment of the present application;

[0034] Figure 3 is an axonometric view of a self-locking device according to an embodiment of the present application;

[0035] Figure 4 is a front sectional view of a self-locking device according to an embodiment of the present application.

[0036] In the above figures: 100, self-locking part; 110, locking tongue; 111, head; 112, bevelled surface; 113, fixing surface; 114, tail; 115, elastic member; 116, handle; 120, cover; 121, first end; 122, second end; 200, stopper; 210, body; 220, bevelled edge; 230, fixing edge; 231, mounting hole; 240, reinforcing edge; 300, mounting block; 400, housing; 500, cover plate. DETAILED DESCRIPTION

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] In this application, unless otherwise clearly indicated and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0040] In this application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0041] In the following, the application will be specifically described by exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can also be beneficially combined into other embodiments without further description.

[0042] The cover plate of the air conditioning unit of the rail vehicle occasionally leaks after maintenance, which may cause the serious accident of the top cover accidentally falling off during the running of the vehicle, directly threatening the safety of the running and the safety of the passengers.

[0043] In view of this, the current part air conditioning unit has been equipped with a self-locking device, which aims to automatically realize the locking function when the cover is closed after maintenance is completed. However, the working environment of these self-locking devices is relatively harsh, and they need to withstand frequent opening and closing operations, and the existing devices generally have the problems of complex structure and insufficient self-locking stability.

[0044] Therefore, the industry urgently needs a new type of self-locking device that is simple in design, light and thin, and has higher self-locking reliability. The device needs to better guarantee its self-locking performance in complex working conditions, thereby ensuring the safe operation of the rail vehicle.

[0045] Based on this, the present application proposes a self-locking device for rail transit air conditioning units, which is light and durable through a simplified structure, and has low production and maintenance costs; self-locking is achieved through inclined surface sliding and elastic return, making the self-locking action smooth and rapid, and improving the self-locking reliability of the device.

[0046] In the following, the embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0047] As shown in the accompanying Figures 1 to 4 In one illustrative embodiment of the automated testing device of the present application, the self-locking device for rail transit air conditioning units includes a baffle 200 and a self-locking portion 100.

[0048] The rail transit air conditioning unit includes a housing 400 and a cover 500, the cover 500 is installed on the top of the housing 400 and is connected to the housing 400 through a hinge, so that the cover 500 can be opened and closed relative to the housing 400.

[0049] The self-locking portion 100 and the baffle 200 are respectively installed on the housing 400 and the cover 500, and the locking between the housing 400 and the cover 500 is realized through the self-locking device.

[0050] The reliable locking function of the self-locking device can avoid the accidental opening of the cover 500 due to the bumping and vibration of the rail vehicle during rail transit operation, ensuring the safe operation of the equipment and the safety of passengers and maintenance personnel.

[0051] The self-locking portion 100 includes a locking tongue 110, and the locking tongue 110 includes a connected inclined surface 112 and a fixed surface 113; the baffle 200 includes an inclined flange 220, and the inclination angle of the inclined flange 220 matches the inclination angle of the inclined surface 112 of the locking tongue 110.

[0052] The locking tongue 110 can be elastically telescopic. When the device is self-locked, after the inclined turned edge 220 of the retaining plate 200 contacts the inclined surface 112 of the locking tongue 110, the inclined turned edge 220 slides along the inclined surface 112 and presses the locking tongue 110, causing the locking tongue 110 to retract. Until the inclined turned edge 220 and the inclined surface 112 are disengaged, the locking tongue 110 is no longer pressed and rebounds to reset, and the fixing surface 113 covers the end of the inclined turned edge 220 to form a lock.

[0053] The inclination angle of the inclined turned edge 220 matches that of the inclined surface 112 of the locking tongue 110. When the device performs a self-locking operation, the cover plate 500 can rotate relative to the housing 400 to close, and the inclined turned edge 220 slides along the inclined surface 112 to press the locking tongue 110. This design enables the locking tongue 110 to smoothly retract and rebound to reset after disengagement, thus achieving the automatic locking of the device. The whole process is smooth and efficient. After the locking tongue 110 rebounds to reset, its fixing surface 113 can cover the end of the inclined turned edge 220 to form a stable locking state, effectively preventing unlocking caused by accidental collision or vibration, improving the reliability of the self-locking device, ensuring that the self-locking device will not fail due to vibration and other factors during the operation of the air conditioner unit, and guaranteeing the normal operation and safety of the equipment. At the same time, only a retaining plate 200 and the bevel turned out from the retaining plate 200 cooperate with the self-locking part 100 for self-locking, simplifying the structure of the self-locking device, making the self-locking device light, thin and durable, and reducing its production and maintenance costs.

[0054] Specifically, the inclined surface 112 extends downward along the extending direction of the locking tongue 110 and extends to be connected with the fixing surface 113. The fixing surface 113 is located at the bottom of the locking tongue 110. The connection between the inclined surface 112 and the fixing surface 113 is the end of the locking tongue 110, that is, the disengagement position of the inclined turned edge 220 and the inclined surface 112.

[0055] Furthermore, the self-locking part 100 includes a housing 120. The housing 120 includes a housing cavity for accommodating the locking tongue 110. The housing cavity includes opposite first end 121 and second end 122.

[0056] As Figure 3 shown, in some embodiments, when looking at the housing 120 from the direction of the first end 121 or the second end 122, the housing 120 specifically presents a "C" - shaped structure and houses the locking tongue 110 therein.

[0057] The locking tongue 110 includes a head 111 and a tail 114. The head 111 and the tail 114 are connected. The head 111 is located on the side close to the first end 121, and the tail 114 is located on the side close to the second end 122.

[0058] The shell cavity has openings at the first end 121 and the second end 122, the head 111 can be telescoped through the first end 121 opening, and the tail 114 can be telescoped through the second end 122 opening.

[0059] An elastic member 115 is arranged between the first end 121 and the second end 122, and the two ends of the elastic member 115 are fixed with the lock tongue 110 and the shell 120 respectively. The elastic member 115 is compressed and rebounded to realize the elastic telescoping of the lock tongue 110 in the shell cavity.

[0060] The design of the openings at both ends of the shell cavity makes the lock tongue 110 not limited by space during telescoping, and the movement is more flexible and smooth. Whether it is pressed and retracted by the blocking piece 200 or rebounded to reset, the action can be quickly and accurately completed, greatly improving the response speed and working efficiency of the self-locking device. At the same time, the shell 120 structure containing the lock tongue 110, by reasonably setting the positions of the openings at both ends and the elastic member 115, realizes complex and efficient functions in a limited space. The layout of each component is compact and reasonable, which not only ensures the normal movement of the lock tongue 110, but also does not occupy too much space, improving the space utilization.

[0061] In some embodiments, the tail 114 has a reduced radial dimension relative to the head 111, and the connection between the head 111 and the tail 114 is a variable diameter portion. The diameter of the elastic member 115 is greater than the diameter of the tail 114 but less than the diameter of the head 111. The elastic member 115 is sleeved on the tail 114, and the end portion abuts against the head 111 at the variable diameter portion. At this time, the fixation between the elastic member 115 and the lock tongue 110 can be realized.

[0062] The diameter of the elastic member 115 is also less than the diameter of the second end 122 opening, and the other end of the elastic member 115 abuts against the second end 122 of the shell cavity. At this time, the fixation between the shell cavity and the lock tongue 110 can be realized.

[0063] In some embodiments, the cross section of the head 111 matches the shape of the cross section of the shell cavity, both being square structures. The shell cavity defines the movement trajectory of the lock tongue 110, avoiding the lock tongue 110 from shaking in other directions when moving in the shell cavity, and ensuring the stability of the self-locking device. The elastic member 115 is a spring, and the cross section of the tail 114 is a circular structure, which facilitates the spring to be sleeved on the outer periphery of the tail 114, and also facilitates the telescoping movement of the tail 114 at the second end 122 opening.

[0064] The variable diameter structure of the lock tongue 110 realizes the precise positioning of the spring, without the need for additional fixing devices, simplifying the structure of the self-locking part 100; prevents the spring from moving axially or radially during work, ensuring that the spring can always stably provide elastic force for the lock tongue 110, maintaining the stability and reliability of the self-locking device.

[0065] Preferably, the length of the spring in the original length state is greater than the length of the tail part 114. In this case, the spring is in a slightly compressed state when it is installed on the lock tongue 110, so that the spring exerts a pushing force on the head part 111 of the lock tongue 110, thereby ensuring that the lock tongue 110 can always maintain the maximum reset state when locked with the stop sheet 200, avoiding the shaking of the lock tongue 110 due to the bumping of the rail vehicle in operation, and affecting the locking effect of the device.

[0066] Further, the bevel surface 112 and the fixed surface 113 are located on the head part 111. When the lock tongue 110 is retracted, the head part 111 is retracted from the first end 121 and the spring is compressed, and the tail part 114 is extended from the second end 122; when the lock tongue 110 rebounds, the spring rebounds and drives the head part 111 to extend from the first end 121, and the tail part 114 to retract from the second end 122.

[0067] In order to realize the opening of the self-locking device, the lock tongue 110 comprises a handle part 116 connected with the lock tongue 110. The handle part 116 is used for manual gripping to pull the lock tongue 110 to open the self-locking device.

[0068] Specifically, the cover 120 is provided with an opening, and the handle part 116 extends out of the cover 120 through the opening. The shell cavity opening extends along the extension and retraction direction of the lock tongue 110.

[0069] In some embodiments, in order to facilitate manual gripping, the cross section of the handle part 116 is square; in order to facilitate fixing and connection, the handle part 116 is connected with the plane of the head part 111 of the lock tongue 110.

[0070] Preferably, the length of the shell cavity opening is greater than or equal to the length of the lock tongue 110 extending from the first end 121 in the reset state, and the width of the shell cavity opening is slightly greater than the width of the handle part 116.

[0071] In some embodiments, the stop sheet 200 further comprises a body 210, which is a planar sheet structure, and the bevel flange 220 is connected with the body 210.

[0072] The stop sheet 200 further comprises a fixed edge 230 connected perpendicularly with the body 210, and the fixed edge 230 comprises a mounting hole 231. The stop sheet 200 is fixed to the cover plate 500 through the mounting hole 231.

[0073] The stop sheet 200 can be conveniently fixed to the cover plate 500 through the mounting hole 231. The mounting process is simple, can be accurately positioned, improves the installation efficiency, ensures the stability of the installation of the stop sheet 200, and provides a basis for the reliable work of the self-locking device.

[0074] Preferably, the shape of the mounting hole 231 is an oblong hole, which facilitates the adjustment of the position of the stop sheet 200 installed on the cover plate 500.

[0075] As Figure 2As shown, in some embodiments, the mounting hole 231 of the fixed edge 230 adopts two screw holes arranged at the same height, and the baffle 200 is fixed on the cover plate 500 by screws.

[0076] In some embodiments, the fixed edge 230 and the beveled edge 220 are respectively connected to two edges adjacent to the body 210, and the beveled edge 220 is connected to the fixed edge 230.

[0077] The body 210 is connected perpendicularly to the fixed edge 230, and the beveled edge 220 is connected to the body 210 and the fixed edge 230, respectively. This structure forms a stable triangular structure for the baffle 200, which can better withstand the force of the locking tongue 110 and keep its structure stable during the locking and unlocking of the device, thereby preventing deformation and ensuring the reliable performance of the self-locking device. At the same time, this compact and reasonable design can effectively utilize the space on the cover plate 500 and does not occupy too much space, which is conducive to the compact layout of the air conditioning unit structure and makes the overall structure more regular.

[0078] In some embodiments, the baffle 200 further includes a reinforcing edge 240 arranged on the opposite side of the beveled edge 220, and the reinforcing edge 240 is connected perpendicularly to the body 210 and the fixed edge 230, respectively.

[0079] The reinforcing edge 240 is connected perpendicularly to the body 210 and the fixed edge 230, respectively, forming a stable support structure. This makes the baffle 200 better disperse stress and reduce the possibility of deformation and damage when subjected to the extrusion force of the locking tongue 110 and other external forces, thereby improving the durability and reliability of the baffle 200 and prolonging its service life. Since the reinforcing edge 240 enhances the structural strength of the baffle 200, the baffle 200 can more stably withstand the force of the locking tongue 110 during the self-locking of the device, ensuring that the cooperation between the beveled edge 220 and the locking tongue 110 is more precise and reliable. This helps to maintain the self-locking state and prevents accidental unlocking due to deformation of the baffle 200, thereby improving the stability of the connection between the air conditioning unit shell 400 and the cover plate 500.

[0080] Preferably, the body 210, the beveled edge 220, the fixed edge 230, and the reinforcing edge 240 of the baffle 200 are formed by bending an entire sheet metal structure, and the beveled edge 220 is connected to the fixed edge 230 and the fixed edge 230 is connected to the reinforcing edge 240 by welding.

[0081] In the self-locking device of the present application, if the baffle 200 and the self-locking part 100 are at the same installation height, the baffle 200 cannot be fixed at the bottom of the locking tongue 110 (or a hole needs to be provided on the unit shell 400 to accommodate the baffle 200). Therefore, in some embodiments, the self-locking device includes a mounting block 300, and the opposite two faces of the mounting block 300 are connected to the self-locking part 100 and the shell 400, respectively.

[0082] The mounting block 300 serves as an intermediate component connecting the self-locking portion 100 and the housing 400, and provides a stable mounting base for the self-locking portion 100. By connecting the mounting block 300 with the housing 400, the position of the self-locking portion 100 on the housing 400 can be accurately determined, making the mounting of the self-locking portion 100 more convenient and accurate, and ensuring the stability and reliability of the overall structure of the self-locking device.

[0083] To ensure that the beveled flange 220 has sufficient falling space, the beveled surface 112 of the locking tongue 110 exceeds the edge of the mounting block 300 in the horizontal direction when the locking tongue 110 is reset.

[0084] This design enables the beveled surface 112 of the locking tongue 110 to have sufficient contact area and good angular matching with the beveled flange 220 of the blocking piece 200 when the two are cooperating. When the beveled flange 220 of the blocking piece 200 slides along the beveled surface 112 of the locking tongue 110, it can more smoothly extrude the locking tongue 110 to retract, and after the locking tongue 110 is reset, it can better cover the end of the beveled flange 220 of the blocking piece 200, forming a stable locking state, thereby improving the locking effect of the self-locking device and preventing looseness between the housing 400 and the cover plate 500.

[0085] Preferably, the height of the mounting block 300 is slightly greater than the height of the beveled flange 220.

[0086] At this time, the body 210 of the blocking piece 200 can be closely attached to the air conditioning unit housing 400, and this attachment mode can effectively disperse the external force borne by the blocking piece 200, avoiding deformation or damage due to excessive local stress; at the same time, the end of the beveled flange 220 can abut against the fixed surface 113 of the locking tongue 110, and the two interact to form a stable mechanical constraint.

[0087] Since the attachment of the body 210 of the blocking piece 200 to the housing 400 provides stable support in the horizontal direction, and the abutment of the end of the beveled flange 220 to the fixed surface 113 restricts the displacement of the blocking piece 200 in the vertical direction, the spatial freedom of the blocking piece 200 is greatly limited. During the operation of the rail transit, even if the air conditioning unit is subjected to various complex vibrations and impacts, the blocking piece 200 will not shake up and down, ensuring the stable state of the blocking piece 200 itself and the reliability of the entire self-locking device.

[0088] Specifically, the mounting block 300 can be processed from solid material, or can be bent and welded from sheet metal.

[0089] In some embodiments, the handle portion 116 is arranged in a direction perpendicular to the connecting surface of the mounting block 300 and the housing 400, and this arrangement direction of the handle portion 116 makes it more convenient for a person to grasp and pull.

[0090] The handle 116 extends out of the cover 120 through an opening and is arranged in a direction perpendicular to the connecting surface of the mounting block 300 and the shell 400, which provides a convenient manual operation approach for the operator. When manual intervention is required for the self-locking device, such as forced unlocking or checking the device status in special cases, the operator can easily access the handle 116. The perpendicular arrangement conforms to the ergonomic principle and is more convenient for the operator to grasp and apply force than the parallel arrangement to the shell 400. Only a simple push or pull along the handle 116 can achieve the extension and retraction of the locking tongue 110, greatly improving the convenience and efficiency of the operation.

[0091] In some embodiments, the mounting block 300 is connected to the shell 400 by welding; the mounting block 300 has a threaded hole, and the cover 120 has a threaded hole matching the position of the threaded hole of the mounting block 300, and the cover 120 is connected to the mounting block 300 by a screw.

[0092] Welding as a permanent connection method can form a stable combination of the mounting block 300 and the shell 400. During the operation of rail transit, air conditioning units will be subjected to various complex vibrations and impacts. The welded connection can effectively resist these external forces and ensure that the mounting block 300 will not loosen or fall off from the shell 400, providing a solid and reliable installation foundation for the entire self-locking device and ensuring long-term stable operation of the self-locking device.

[0093] The mounting block 300 is connected to the cover 120 by a screw, which can easily fix the cover 120 on the mounting block 300 during the installation of the self-locking device, and the operation is simple without the need for complex tools and professional skills. When checking or replacing the self-locking part 100 during later maintenance or repair, the cover 120 can be easily removed from the mounting block 300 by unscrewing the screw, which improves the efficiency of maintenance work and reduces maintenance costs.

[0094] Preferably, the threaded hole on the cover 120 is an oblong hole, which facilitates the adjustment of the position of the cover 120 installed on the mounting block 300.

[0095] The automatic locking process of the self-locking device for rail transit air conditioning units of the present application is as follows:

[0096] The cover plate 500 is pressed to the shell 400 under the action of gravity or artificial pushing force, the stopper 200 is pressed to the self-locking part 100 following the cover plate 500, the inclined flange 220 of the stopper 200 is in contact with the inclined surface 112 of the lock tongue 110, then the inclined flange 220 slides along the inclined surface 112 and extrudes the lock tongue 110, so that the lock tongue 110 is retracted; until the inclined flange 220 and the inclined surface 112 are out of contact, the lock tongue 110 is no longer extruded and is reset, the fixed surface 113 is in abutment with the end of the inclined flange 220, the stopper 200 is fixed at the bottom of the lock tongue 110, and the locking is achieved.

[0097] The self-locking device for the rail transit air conditioning unit of the present application needs to be manually unlocked, and the process is as follows:

[0098] The hand holds the handle 116 and pulls it in the direction of the second end 122, so that the tail part 114 is stretched out from the opening of the second end 122, the head part 111 is retracted from the opening of the first end 121, and the spring is compressed, until the lock tongue 110 is retracted to the position that the fixed surface 113 no longer covers the end of the inclined flange 220 in the vertical direction (or the lock tongue 110 is retracted to the position that the fixed surface 113 no longer abuts with the end of the inclined flange 220), then the other hand can lift the cover plate 500.

[0099] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A self-locking device for a rail transit air conditioning unit, characterized in that, It comprises a baffle and a self-locking part; The self-locking part comprises: A lock tongue comprising a bevel and a fixed surface connected together, the lock tongue being elastically retractable; The baffle comprises: A beveled flange matching the bevel in angle; When the device is locked, the beveled flange slides along the bevel to retract the lock tongue, and the lock tongue is reset after the lock tongue is out of contact, the fixed surface covering the end of the beveled flange to form a lock.

2. The self-locking device for rail transit air conditioning unit according to claim 1, characterized in that, The air conditioning unit comprises a shell and a cover plate, the self-locking part and the baffle are respectively installed on the shell and the cover plate, and the locking between the shell and the cover plate is realized through the self-locking device.

3. The self-locking device for rail transit air conditioning unit according to claim 2, characterized in that, The baffle comprises a body and a fixed edge connected perpendicularly to the body, the fixed edge comprising a mounting hole, the baffle being fixed to the cover plate through the mounting hole; the beveled flange is connected to the body and the fixed edge respectively.

4. The self-locking device for rail transit air conditioning unit according to claim 3, characterized in that, The baffle comprises a reinforcing edge arranged on the opposite side of the beveled flange, the reinforcing edge being connected perpendicularly to the body and the fixed edge respectively.

5. The self-locking device for rail transit air conditioning unit according to any one of claims 2-4, characterized in that, The self-locking device comprises a mounting block, the opposite two surfaces of the mounting block being connected to the self-locking part and the shell respectively, the bevel of the lock tongue exceeding the edge of the mounting block when the lock tongue is reset.

6. The self-locking device for rail transit air conditioning unit according to claim 5, characterized in that, The height of the mounting block is slightly greater than the height of the beveled flange.

7. The self-locking device for rail transit air conditioning unit according to claim 5, characterized in that, The self-locking part comprises a cover, the cover comprising a housing cavity accommodating the lock tongue, the housing cavity comprising opposite first and second ends; The lock tongue comprises a head and a tail, the head being located on the side close to the first end, and the tail being located on the side close to the second end; The housing cavity has openings at the first and second ends, the head being retractable through the first end opening, and the tail being retractable through the second end opening; An elastic member is arranged between the first and second ends, the two ends of the elastic member being fixed to the lock tongue and the cover respectively.

8. The self-locking device for rail transit air conditioning unit according to claim 7, characterized in that, The tail has a reduced radial dimension relative to the head, the elastic member being a spring sleeved on the tail, the spring being limited between the variable-diameter portion and the second end; The bevel and the fixed surface are located on the head; When the lock tongue is retracted, the head is retracted through the first end opening and compresses the spring, and the tail is extended through the second end opening; when the lock tongue is reset, the spring is reset and drives the head to extend through the first end opening and the tail to retract through the second end opening.

9. The self-locking device for rail transit air conditioning unit according to claim 7, characterized in that, The lock tongue comprises a handle connected to the head, and the cover is provided with an opening; The handle extends out of the cover through the opening, and the handle is arranged in a direction perpendicular to the connecting surface of the mounting block and the shell.

10. The self-locking device for rail transit air conditioning unit according to any one of claims 7-9, characterized in that, The mounting block is welded to the shell, the mounting block has a threaded hole, the cover has a threaded hole matching the position of the threaded hole of the mounting block, and the cover is connected to the mounting block through a screw.

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