Box cover lock structure

Abstract

The invention discloses a box cover lock structure, which belongs to the technical field of filter devices and comprises a lock seat and an ear lock mechanism assembly. The lock seat comprises two side edges; the ear lock mechanism assembly comprises an ear lock box, a locking mechanism and an unlocking mechanism; the bottom of the ear lock box is rotationally connected with the two side edges of the lock seat, so that the ear lock mechanism assembly is in an inclined state or an upright state; the ear lock box comprises a fixed ear and a box body; the fixed lug is vertically and fixedly connected to a box body of the lug lock box and synchronously rotates along with the lug lock box; the locking mechanism is arranged in the ear lock box, and two ends of the locking mechanism are telescopic; when the two ends of the locking mechanism extend outwards, the ear lock mechanism assembly is in a locking state; when the two ends of the locking mechanism are tightened inwards, the ear lock mechanism assembly is in an unlocking state; the unlocking mechanism comprises a lifting handle, and the lifting handle is used for shifting the two ends of the locking mechanism to extend outwards and contract inwards. The operation of tightening and unscrewing the bolts is omitted, so that the box cover is convenient to close and open, and time and labor are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of filtering devices, and particularly relates to a box cover locking structure. Background Art

[0002] As engines become increasingly common across various vehicle models, higher demands are being placed on the ease of use of engine auxiliary system components, requiring ease of maintenance and upkeep. As a key component of the engine auxiliary system, the air filter's ease of maintenance is particularly crucial. After the engine has operated for a period of time, the air filter requires maintenance and upkeep. The main steps are as follows: First, open the lid of the air filter case (hereinafter referred to as the case); second, remove the air filter element for maintenance; and third, close and secure the lid. Therefore, the ability to quickly and easily open and close the lid directly impacts the ease of use of the air filter.

[0003] At present, the air filter box body and the box cover are locked and connected by tightening screws, such as Figure 1 When the box cover 10 is opened, the two nuts 7 on the tightening screw 6 need to be loosened. When the two nuts 7 are loosened to a certain height and the limit is released, the tightening screw 6 is rotated and removed from the ear groove together with the flat washer 11 and the two nuts 7. Generally, each box body includes at least six to eight, or even ten tightening screws 6. It can be seen that the process of locking and unlocking the entire box body and the box cover 10 is time-consuming and laborious, especially when multiple frequent operations are required, this problem is more prominent. Summary of the Invention

[0004] In view of this, the present invention provides a box cover locking structure, which eliminates the need for tightening and unscrewing bolts, making the box cover easy to close and open, saving time and effort.

[0005] The present invention is achieved through the following technical solutions:

[0006] A box cover lock structure includes: a lock seat and an ear lock mechanism assembly;

[0007] The lock seat includes: two sides;

[0008] The ear lock mechanism assembly includes: an ear lock box, a locking mechanism and an unlocking mechanism;

[0009] The bottom of the ear lock box is rotatably connected to the two sides of the lock seat, so that the ear lock mechanism assembly is in an inclined state or an upright state; the ear lock box includes: a fixed ear and a box body;

[0010] The fixed ear is vertically fixed to the body of the ear lock box and rotates synchronously with the ear lock box;

[0011] The locking mechanism is arranged in the ear lock box, and its two ends are retractable;

[0012] When the two ends of the locking mechanism extend outward, the ear lock box is locked to the two sides of the lock seat, and the ear lock mechanism assembly is in a locked state;

[0013] When the two ends of the locking mechanism are tightened inward, the two sides of the ear lock box and the lock seat are unlocked, and the ear lock mechanism assembly is in the unlocked state;

[0014] The unlocking mechanism comprises a handle, which is used to move the two ends of the locking mechanism to extend outwards and retract inwards.

[0015] Furthermore, a pin hole A and a lock hole A are provided on each side of the lock seat, and the lock hole A is located above the pin hole A;

[0016] The two pin holes A are arranged opposite to each other, and the two lock holes A are arranged opposite to each other;

[0017] The ear lock box is rotatably connected to the pin hole A via the pin shaft A;

[0018] When the ear lock mechanism assembly is in the locked state, both ends of the locking mechanism extend from the corresponding lock holes A respectively;

[0019] When the ear lock mechanism assembly is in the unlocked state, both ends of the locking mechanism are tightened and disengaged from the corresponding lock holes A respectively.

[0020] Furthermore, the locking mechanism includes: a lock slot, a spring A, two lock tongues and two sliding pins;

[0021] The two ends of the lock slot are open, and two opposite sides of the lock slot are respectively provided with a slide rail, and the length direction of the slide rail is parallel to the length direction of the lock slot;

[0022] The two lock tongues are respectively located at the two ends of the lock slot, and each lock tongue is slidably connected to the slide rail through a sliding pin;

[0023] The two ends of spring A respectively press against the ends of the two lock tongues located inside the lock slot;

[0024] The handle is used to move the two sliding pins of the locking mechanism, so that the two lock tongues extend outward and tighten inward.

[0025] Furthermore, the unlocking mechanism further comprises: a box cover, a limit pin, two lifting arms, two rocker arm groups and two pin shafts B;

[0026] The box cover comprises: a box cover plate, a box cover cylinder and two box cover cantilevers;

[0027] The box cover is arranged on the top of the ear lock box, and a box cover hole is arranged at the geometric center of the box cover;

[0028] The box cover cylinder is arranged at the bottom of the box cover plate and is coaxial with the box cover hole;

[0029] The handle is inserted into the hole of the box cover, and its bottom extends out from the bottom of the box cover tube; the bottom of the handle is provided with a handle groove;

[0030] The two cantilevers of the box cover are symmetrically arranged on both sides of the bottom of the box cover cylinder; the axes of the cantilevers of the box cover are perpendicular to the axis of the box cover cylinder and parallel to the axis of the sliding pin;

[0031] The two lifting arms are located in the handle grooves; the tops of the two lifting arms are rotatably connected to the limit pins respectively, forming an inverted V-shaped structure that is centrally symmetrical; the axis of the limit pin is parallel to the axis of the cantilever of the box cover;

[0032] Two pins B are arranged parallel and symmetrically at the bottom of the two lifting arms; each pin B can rotate relative to the corresponding lifting arm;

[0033] The two rocker arm groups are symmetrically arranged on the two pin shafts B; the tops of the two rocker arm groups are rotatably connected to the cantilever of the box cover, and the bottoms of the two rocker arm groups are plugged into the corresponding two sliding pins;

[0034] The handle is used to drive the lifting arm to move up and down;

[0035] When the lifting arm moves upward and enters the box cover tube, the V-shaped opening end is tightened; when the lifting arm moves downward and leaves the box cover tube, the V-shaped opening end is opened;

[0036] When the V-shaped opening end is tightened, the two rocker arm groups drive the sliding pin to move inward along the slide rail; when the V-shaped opening end is opened, the two rocker arm groups drive the sliding pin to move outward.

[0037] Furthermore, when the V-shaped opening end is opened, the size of the opening end is larger than the inner diameter of the box cover tube; when the V-shaped opening end is tightened, the size of the opening end is smaller than the inner diameter of the box cover tube.

[0038] Furthermore, the unlocking mechanism further comprises: a spring B;

[0039] The spring B is sleeved outside the lifting arm; the top of the spring B abuts against the lower end surface of the box cover plate, and the bottom of the spring B abuts against the two lifting arms.

[0040] Furthermore, the rocker arm assembly includes: two rocker arms arranged opposite to each other;

[0041] The two rocker arms of the same group are symmetrically arranged at both ends of the corresponding pin shaft B;

[0042] Each rocker arm is provided with rocker arm hole A and rocker arm hole B on the top and rocker arm long slot on the bottom;

[0043] The top of the rocker arm is rotatably connected to the corresponding cantilever of the box cover through the rocker arm hole A, and is fixedly connected to the pin shaft B through the rocker arm hole B;

[0044] The bottom of the rocker arm is plugged into the corresponding sliding pin through the long rocker arm slot.

[0045] Furthermore, the top of the rocker arm is biased inwardly relative to the bottom thereof.

[0046] Furthermore, the end of the lock tongue facing outward from the lock slot is provided with a slope, so that the lock tongue is tightened inward as the lock seat is squeezed.

[0047] Furthermore, the locking mechanism further includes: a limiting column;

[0048] The limiting column is coaxially arranged in the spring A;

[0049] The sum of the axial length of the limiting column and the length of the two locking tongues is greater than the length of the locking groove.

[0050] Beneficial effects:

[0051] (1) The present invention provides a box cover lock structure, in which the ear lock box is rotatably connected to the two side edges of the lock seat, so that the ear lock mechanism assembly is in an inclined state or an upright state; the fixed ear that cooperates with the tightening screw to achieve locking rotates synchronously with the ear lock box, so that when the ear lock mechanism assembly is in an inclined state, the tightening screw provided with a bolt can be inserted to cooperate to achieve locking; the box cover lock structure realizes locking between the ear lock box and the lock seat by extending outward and tightening inward at both ends of the locking mechanism, and the extension and tightening of both ends of the locking mechanism are controlled by the handle of the unlocking mechanism, so that the closing and opening of the box cover are convenient, saving time and effort.

[0052] (2) In a box cover lock structure of the present invention, two lock tongues are respectively located at the two ends of a lock groove, and each lock tongue is slidably connected to a slide rail via a slide pin, so that the lock tongue can easily extend outward and tighten inward at both ends of the locking mechanism by moving the slide pin.

[0053] (3) A box cover locking structure of the present invention, the unlocking mechanism also includes: a box cover, a limit pin, two lifting arms, two rocker arm groups and a pin shaft B; that is, the box cover locking mechanism can easily achieve the locking and unlocking of the locking mechanism by moving the lifting handle up and down; the box cover cantilever is fixedly connected to both sides of the bottom of the box cover tube, and the tops of the two rocker arm groups are respectively connected to the box cover cantilever for rotation, and the rocker arm groups are restricted by the box cover cantilever to move upward with the lifting arm, so that the two rocker arm groups swing around the box cover cantilever, thereby preventing the sliding pin from detaching from the corresponding rocker arm group.

[0054] (4) A box cover lock structure of the present invention has a V-shaped opening end that is larger than the inner diameter of the box cover tube when the opening end is opened, and is smaller than the inner diameter of the box cover tube when the opening end is tightened, so that the V-shaped opening end formed by the two lifting arms can be tightened and opened through the box cover tube, thereby realizing the swing of the two rocker arm groups and further realizing the toggle control of the sliding pin.

[0055] (5) In a box cover lock structure of the present invention, the spring B is sleeved outside the lifting arm; the top of the spring B abuts against the lower end surface of the box cover plate, and the bottom of the spring B abuts against the two lifting arms. The spring B provides spring force to facilitate the reset of the handle and maintain the locked state.

[0056] (6) In a box cover lock structure of the present invention, the top of the rocker arm is offset inward relative to the bottom thereof, thereby ensuring that the rocker arm is not affected by the box cover tube when it swings inward to tighten, thereby ensuring sufficient swing space.

[0057] (7) In the case cover lock structure of the present invention, a slope is provided on one end of the lock tongue facing outward from the lock groove. The ear lock box of the ear lock mechanism assembly is rotated so that the lock tongue is tightened inward as the lock seat is squeezed. Thus, the case cover lock structure can complete the conversion of the ear lock mechanism assembly from an inclined state to an upright state without operating the handle, thereby achieving locking, thereby making the locking process simpler and faster.

[0058] (8) In a box cover lock structure of the present invention, a limiting column is coaxially arranged in the spring A, and the sum of the axial length of the limiting column and the length of the two lock tongues is greater than the length of the lock groove, which can effectively prevent the spring A from shortening too much and causing the lock tongue to separate from the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a structural diagram of the existing box cover lock structure;

[0060] Figure 2 This is a schematic diagram of the unlocking state of the present invention;

[0061] Figure 3 It is a schematic diagram of the locked state of the present invention;

[0062] Figure 4 It is a structural schematic diagram of the lock seat of the present invention;

[0063] Figure 5 Schematic diagram of the exploded structure of the ear lock mechanism assembly of the present invention;

[0064] Figure 6 It is a structural schematic diagram of the box body of the present invention;

[0065] Figure 7 It is a structural schematic diagram of the locking mechanism of the present invention;

[0066] Figure 8 It is a structural schematic diagram of the unlocking mechanism of the present invention;

[0067] Figure 9 Schematic diagram A of the structure of the box cover of the present invention;

[0068] Figure 10 Schematic diagram B of the structure of the box cover of the present invention;

[0069] Figure 11 It is a structural schematic diagram of the rocker arm assembly of the present invention;

[0070] Figure 12 It is a structural schematic diagram of the handle of the present invention;

[0071] Among them, 1-lock seat, 11-pin hole A, 12-lock hole A, 2-ear lock mechanism assembly, 21-ear lock box, 22-locking mechanism, 23-unlocking mechanism, 24-cover pin, 211-fixed ear, 212-box body, 213-pin hole B, 214-lock hole B, 215-cover hole, 216-lock box internal length, 221-lock slot, 222-spring A, 223-limiting column, 224-lock tongue, 225-sliding pin, 226-flat washer A, 231-box cover, 232-handle, 233-spring B, 234-lifting arm, 235-limiting pin, 236-rocker arm, 237-pin shaft B, 2124-cover hole, 2211-sliding Rail, 2241-lock tongue sliding pin hole, 2242-slope, 2311-box cover plate, 2312-vertical plate, 2313-box cover cylinder, 2314-box cover cantilever, 2315-box cover hole, 2316-box cover cylinder inner diameter, 2317-box cover cantilever hole, 2321-handle head, 2322-handle rod, 2323-handle slot, 2324-handle pin hole, 2361-rocker arm hole A, 2362-rocker arm hole B, 2363-rocker arm long slot, 3-pin A, 4-cotter pin, 5-box body fixing ear, 6-tightening screw, 7-nut, 8-box cover fixing ear, 9-box body, 10-box cover, 11-flat washer B, 12-pin C. DETAILED DESCRIPTION

[0072] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0073] This embodiment provides a box cover locking structure, such as Figure 2 and Figure 3 As shown, it is set on the box cover 10 and cooperates with the tightening screw 6 on the box body 9 to achieve the connection between the box body 9 and the box cover 10. Figure 1 The surface of the fixing ear of the box cover 10 is fixedly connected to the top surface of the box cover 10.

[0074] The cover lock structure includes: a lock seat 1, an ear lock mechanism assembly 2, a pin shaft A3 and a plurality of cotter pins 4.

[0075] like Figure 4 As shown, the lock base 1 is a U-shaped structure, comprising a bottom edge and two side edges. The bottom edge of the lock base 1 is arranged parallel to the top surface of the box cover 10, and the two side edges are perpendicular to the bottom edge of the box cover 10 and located on either side of the bottom edge. Each side edge of the lock base 1 is machined with a pin hole A11 and a lock hole A12, with the lock hole A12 located above the pin hole A11. The two pin holes A11 are arranged opposite each other, and the two lock holes A12 are arranged opposite each other. As an example, the lock hole A12 is located at the top of the side edge of the lock base 1, and the pin hole A11 is located at the bottom of the side edge of the lock base.

[0076] The bottom of the ear lock mechanism assembly 2 is rotatably connected to pin holes 11 on both sides of the lock base 1 via a pin A3, allowing the ear lock mechanism assembly 2 to be positioned in either a tilted or upright position. When the ear lock mechanism assembly 2 is in the tilted position, the tightening screw 6 can be inserted into or removed from the cover lock structure without screwing in and out the nut 7. When the ear lock mechanism assembly 2 is in the upright position, the ear lock mechanism assembly 2 and the lock base 1 can be locked or unlocked.

[0077] Specifically, such as Figure 5 As shown, the ear lock mechanism assembly 2 includes: an ear lock box 21, a locking mechanism 22, an unlocking mechanism 23 and two or more cover pins 24.

[0078] like Figure 6 As shown, the ear lock box 21 includes: a fixed ear 211 and a box body 212.

[0079] The box body 212 is hollow and open at the top. Two pin holes B213 and two lock holes B214 are provided on the sidewalls of the box body 212. The two pin holes B213 correspond one-to-one with the two pin holes A11, and the two lock holes B214 correspond one-to-one with the two lock holes A12. As an example, the lock holes B214 are located in the middle of the box body 212, and the pin holes B213 are located at the bottom of the box body 212.

[0080] The fixing lug 211 is vertically fixed to the outer wall of the box body 212 and located between the two lock holes B214. The plane of the fixing lug 211 is parallel to the top surface of the box lid 10. The fixing lug 211 has a lug slot, with the open end facing away from the box body 212, for inserting the fastening screw 6. The fixing lug 211 rotates synchronously with the rotation of the box body 212, allowing the fastening screw 6, which is equipped with two bolts 7, to be inserted into the lug slot.

[0081] like Figure 7 As shown, the locking mechanism 22 has retractable ends and is disposed in the interior space of the box body 212 to restrict the box body 212 to the two lock holes A12 of the lock base 1. The locking mechanism 22 includes a lock slot 221, a spring A222, a limiting column 223, two lock tongues 224, and two sliding pins 225.

[0082] The lock slot 221 is hollow and open at both ends. A slide rail 2211 is positioned on each of the two opposing side walls of the lock slot 221. The length of the slide rail 2211 is parallel to the length of the lock slot 221. The two slide rails 2211 are positioned at the same height. The length of the lock slot 221 is less than the internal length 216 of the lock box.

[0083] Two locking tongues 224 are located at the two open ends of the lock slot 221 and are respectively secured within the slide rail 2211 via a sliding pin 225. The sliding pin 225 slidably engages the slide rail 2211. Each locking tongue 224 has a slope 2242 at the end facing outward from the lock slot 221, allowing the locking tongue 224 to tighten inward as the lock base 1 is pressed. The outer dimensions of the locking tongue 224 are smaller than the internal cross-sectional dimensions of the lock slot 221. The outer dimensions of the locking tongue 224 are smaller than the dimensions of the lock hole A12 and the lock hole B214.

[0084] The spring A222 is disposed in the lock slot 221 , and both ends of the spring A222 respectively abut against the ends of the two lock tongues 224 located inside the lock slot 221 .

[0085] The limiting post 223 is coaxially disposed within the spring A222 to prevent the locking tongue 224 from excessively moving inward, potentially releasing the restraint between the locking mechanism 22 and the ear lock box 21. The outer diameter of the limiting post 223 is smaller than the inner diameter of the spring A222. The sum of the axial length of the limiting post 223 and the length of the two locking tongues 224 (i.e., the length of the locking tongues 224 along the length of the lock slot 221) is greater than the length of the lock slot 221, thereby preventing the spring A222 from shortening excessively, potentially causing the locking tongues 224 to separate from the box body 212.

[0086] In this embodiment, the slide rail 2211 limits the head of the slide pin 225 , and a flat washer 226 is provided at the tail of the slide pin 225 to prevent the slide pin 225 from escaping from the lock slot 221 along its axial direction.

[0087] The lock slot 221 is arranged in the lock hole A12 of the box body 212 through the cooperation of the lock tongue 224 and the spring A222.

[0088] When the two lock tongues 224 extend outward, they are respectively inserted into the two lock holes A12 on the lock seat 1. The two lock tongues 224 maintain the extended state under the elastic force of the spring A222, thereby realizing the locking between the ear lock mechanism assembly 2 and the lock seat 1, and are in the locked state; when the two lock tongues 224 are tightened inward by force, the lock between the ear lock mechanism assembly 2 and the lock seat is released, and are in the unlocked state, and after the force is released, the two lock tongues return to the extended state under the action of the elastic force of the spring A222.

[0089] like Figure 8 As shown, the unlocking mechanism 23 is used to move the sliding pin 225 of the locking mechanism 22. The unlocking mechanism 23 includes: a box cover 231, a handle 232, a spring B233, a limit pin 235, two lifting arms 234, two rocker arm groups and two pin shafts B237.

[0090] like Figure 9 and Figure 10 As shown, the box cover 231 includes: a box cover plate 2311 , two vertical plates 2312 , a box cover tube 2313 and two box cover cantilevers 2314 corresponding to the sliding pins 225 on a one-to-one basis.

[0091] The box cover plate 2311 is arranged on the top open end of the ear lock box 21. A box cover hole 2315 is provided at the geometric center of the box cover plate 2311 for inserting the handle 232.

[0092] The box cover tube 2313 is disposed at the bottom of the box cover plate 2311 , and the box cover tube 2313 is coaxial with the box cover hole 2315 .

[0093] The two vertical plates 2312 are located at the bottom of the box cover 2311, one on each side of the box cover 2311. The box cover 231 is fixedly connected to the top open end of the ear lock box 21 via the vertical plates 2312. As an example, the vertical plates 2312 are connected to the top of the ear lock box 21 via a cover pin 24 and a cotter pin 4.

[0094] like Figure 12As shown, the handle 232 comprises a handle head 2321 and a handle rod 2322. The outer diameter of the handle head 2321 is larger than the outer diameter of the handle rod 2322 and also larger than the diameter of the lid hole 2315. A handle slot 2323 is defined at the bottom of the handle rod 2322, with handle pin holes 2324 located on either side of the slot 2323. The two handle pin holes 2324 are coaxial. The handle rod 2322 is inserted into the lid hole 2315 of the lid plate 2311, and the handle slot 2323 extends from the bottom of the lid tube 2313. The handle 232 moves up and down along the axial direction of the lid tube 2313. The outer diameter of the handle head 2321 is larger than the diameter of the lid hole 2315, so that the lid plate 2311 acts as a stop for the handle head 2321.

[0095] like Figure 9 and Figure 10 As shown, two lid cantilever arms 2314 are symmetrically arranged on both sides of the bottom of the lid tube 2313. The axes of the two lid cantilever arms 2314 are perpendicular to the axis of the lid tube 2313, and the axes of the lid cantilever arms 2314 are parallel to the axis of the sliding pin 225. Each end of each lid cantilever arm 2314 is provided with a lid cantilever hole 2317, and each lid cantilever hole 2317 is provided with a cotter pin 4.

[0096] like Figure 8 As shown, the limiting pin 235 is coaxially inserted into the two handle pin holes 2324 , and the axis of the limiting pin 235 is parallel to the axis of the box cover cantilever 2314 .

[0097] The two lifting arms 234 are positioned within the handle slots 2323. The tops of the two lifting arms 234 are pivotally connected to stop pins 235, forming an inverted V-shaped structure that is centrally symmetrical. The bottom open end of the V-shape opens and closes as the two stop pins 235 rotate. When the V-shaped open end opens, it is larger than the inner diameter 2316 of the lid tube. When the V-shaped open end closes, it is smaller than the inner diameter 2316 of the lid tube.

[0098] Two pins B237 are parallel and symmetrically positioned at the bottoms of the two lifting arms 234 (i.e., the ends of the lifting arms 234 located at the open ends of the V-shaped structure); each pin B237 is capable of relative rotation with its corresponding lifting arm 234. The axis of each pin B237 is parallel to the axis of the stop pin 235. A cotter pin 4 is positioned at each end of each pin B237.

[0099] The two rocker arm assemblies are symmetrically mounted on two pins B237. The tops of the two rocker arm assemblies are pivotally connected to the lid cantilever 2314. The lid cantilever 2314 restricts the rocker arm assemblies from moving upward with the lifting arm 234, allowing the two rocker arm assemblies to swing around the lid cantilever 2314. The bottoms of the two rocker arm assemblies are inserted into the corresponding two sliding pins 225. The rocker arm assemblies move the two sliding pins 225 along the slide rail 2211.

[0100] like Figure 11 As shown, specifically, each rocker arm group includes: two rocker arms 236.

[0101] The two rocker arms 236 of the same group are symmetrically positioned at either end of their corresponding pins B237. Each rocker arm 236 has a rocker hole A2361 and a rocker hole B2362 at its top and a long rocker slot 2363 at its bottom. The top of each rocker arm 236 is pivotally connected to the corresponding cover cantilever arm 2314 via the rocker hole A2361 and fixedly connected to the pin B237 via the rocker hole B2362. The bottom of each rocker arm 236 is inserted into the corresponding sliding pin 225 via the long rocker slot 2363. The two cotter pins 4 on the pin B237 axially limit the two corresponding rocker arms 236, while the cotter pin 4 on the cover cantilever arm 2314 also axially limits the two corresponding rocker arms 236. The head and flat washer 226 of the sliding pin 225 also axially limit the two corresponding rocker arms 236. The top of each rocker arm 236 is offset inward (i.e., in the tightening direction) relative to its bottom, thereby ensuring that the rocker arm 236 is not affected by the box cover tube 2313 when it swings inward to tighten, thereby ensuring sufficient swing space.

[0102] The spring B233 is sleeved on the outside of the lifting arm 234. The top of the spring B233 contacts the lower end surface of the box cover 2311, and the bottom of the spring B233 contacts the two lifting arms 234. The spring B233 provides spring force to facilitate the reset of the handle 234 and maintain the locked state.

[0103] Working principle:

[0104] The box cover locking structure in this embodiment can easily realize the closing and opening of the box cover 10.

[0105] To unlock, lift handle 232 upward, which drives the two lifting arms 234 upward. When the two lifting arms 234 enter the lid tube 2313, they tighten, causing the two rocker assemblies to swing inward around the lid cantilever 2314. The two sliding pins 225, along with their corresponding rocker assemblies, slide inward along the slide rails 2211 on the lock slot 221. The two locking tongues 224 move inward along with the sliding pins 225, disengaging them from the lock holes A12 on the lock base 1, thereby releasing the restraining connection between the ear lock assembly 2 and the lock base 1. Once the restraining is released, the ear lock assembly 2 is tilted, releasing the tightening screw 6 from the fixed ear 211, and unlocking is complete.

[0106] When locking: Rotate the ear lock mechanism assembly 2 and the tightening screw 6 so that the tightening screw 6 can be inserted into the ear groove of the fixed ear 211. When the ear lock mechanism assembly 2 is rotated in the opposite direction, the tightening screw 6 also rotates in the opposite direction along with the ear lock mechanism assembly 2. When the ear lock mechanism assembly 2 enters the lock base 1, the two lock tongues 224 of the locking mechanism 22 move inward. When the lock hole B214 on the lock box 212 coincides with the lock hole A12 on the lock base 1, the lock tongue 224 pops outward under the elastic force of the spring B222 and inserts into the corresponding lock hole A12, thereby limiting the ear lock mechanism assembly 2 and completing the locking. At this time, the ear lock mechanism assembly 2 is in an upright state.

[0107] It can be seen that the box cover locking mechanism is easy to operate and can solve the problem of time-consuming and labor-intensive opening and closing of the box cover 10 during air filter element maintenance.

[0108] The assembly method of the box cover lock structure includes the following steps:

[0109] Step 1: Assembly of the locking mechanism 22 and the ear lock box 21:

[0110] Press the lock tongues 224 on both sides of the locking mechanism 22 toward the inside of the lock groove at the same time, and move the locking mechanism 22 to the lock hole B214 of the ear lock box 21, and align the lock tongues 224 and the lock hole B214; loosen the lock tongues 224 on both sides so that the lock tongues 224 are inserted into the corresponding lock holes B214.

[0111] Step 2: Assembly of the unlocking mechanism 23 and the locking mechanism 22:

[0112] The unlocking mechanism is placed in the ear lock box 21. At this time, the long slots 2363 of the four rocker arms 236 of the unlocking mechanism 23 are respectively inserted into the corresponding two sliding pins 225 of the locking mechanism 22, and the two rocker arms 236 on each rocker arm group are respectively inserted into the inner side of the head of the sliding pin 225 and the inner side of the flat pad 226.

[0113] Step 3: Assembly of the unlocking mechanism 23 and the ear lock box 21:

[0114] The vertical plate 2312 of the unlocking mechanism 23 is placed downward into the open end of the top of the box cover 231, the through holes on the vertical plate 2312 and the box cover 231 are aligned, and the cover pin 24 is inserted, and finally locked by the cotter pin 4 respectively.

[0115] Step 4: Assembly between the ear lock mechanism assembly 2 and the lock seat 1:

[0116] Insert the ear lock mechanism assembly 2 into the U-shaped interior of the lock base 1, align the pin hole A11 on the lock base 1 with the cover hole 215 on the ear lock box 21, insert the shaft pin A, and lock it with the cotter pin 4 to complete the assembly.

[0117] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A box cover lock structure, characterized in that: include: Lock seat (1) and ear lock mechanism assembly (2); The lock seat (1) comprises: two side edges; The ear lock mechanism assembly (2) comprises an ear lock box (21), a locking mechanism (22) and an unlocking mechanism (23); The bottom of the ear lock box (21) is rotatably connected to the two side edges of the lock base (1), so that the ear lock mechanism assembly (2) is in an inclined state or an upright state; the ear lock box (21) comprises: a fixed ear (211) and a box body (212); The fixed ear (211) is vertically fixed to the box body (212) of the ear lock box (21) and rotates synchronously with the ear lock box (21); The locking mechanism (22) is arranged in the ear lock box (21), and its two ends are retractable; When both ends of the locking mechanism (22) extend outward, the ear lock box (21) is locked to the two side edges of the lock base (1), and the ear lock mechanism assembly (2) is in a locked state; When the two ends of the locking mechanism (22) are tightened inward, the ear lock box (21) and the two side edges of the lock seat (1) are unlocked, and the ear lock mechanism assembly (2) is in an unlocked state; The unlocking mechanism (23) comprises a handle (232), and the handle (232) is used to move the two ends of the locking mechanism (22) to extend outward and retract inward.

2. A box cover lock structure as claimed in claim 1, characterized in that: Each side of the lock seat (1) is provided with a pin hole A (11) and a lock hole A (12), and the lock hole A (12) is located above the pin hole A (11); The two pin holes A (11) are arranged opposite to each other, and the two lock holes A (12) are arranged opposite to each other; The ear lock box (21) is rotatably connected to the pin hole A (11) via the pin shaft A (3); When the ear lock mechanism assembly (2) is in a locked state, both ends of the locking mechanism (22) extend from the corresponding lock holes A (12); When the ear lock mechanism assembly (2) is in the unlocked state, the two ends of the locking mechanism (22) are respectively tightened and disengaged from the corresponding lock holes A (12).

3. A box cover lock structure as claimed in claim 1, characterized in that: The locking mechanism (22) comprises: a locking slot (221), a spring A (222), two locking tongues (224) and two sliding pins (225); Both ends of the locking slot (221) are open, and two opposite sides of the locking slot (221) are each provided with a slide rail (2211), and the length direction of the slide rail (2211) is parallel to the length direction of the locking slot (221); The two locking tongues (224) are respectively located at the two ends of the locking groove (221), and each locking tongue (224) is slidably connected to the slide rail (2211) via a sliding pin (225); The two ends of the spring A (222) respectively abut against the ends of the two locking tongues (224) located inside the locking groove (221); The handle (232) is used to move the two sliding pins (225) of the locking mechanism (22), so that the two locking tongues (224) extend outward and tighten inward.

4. A box cover lock structure as claimed in claim 3, characterized in that: The unlocking mechanism (23) further comprises: a box cover (231), a limit pin (235), two lifting arms (234), two rocker arm groups and two pin shafts B (237); The box cover (231) comprises: a box cover plate (2311), a box cover cylinder (2313) and two box cover cantilevers (2314); The box cover plate (2311) is arranged on the top of the ear lock box (21), and a box cover hole (2315) is provided at its geometric center; The box cover cylinder (2313) is arranged at the bottom of the box cover plate (2311) and is coaxial with the box cover hole (2315); The handle (232) is inserted into the box cover hole (2315), and its bottom extends from the bottom of the box cover tube (2313); the bottom of the handle (232) is provided with a handle groove (2323); The two lid cantilevers (2314) are symmetrically arranged on both sides of the bottom of the lid cylinder (2313); the axes of the lid cantilevers (2314) are perpendicular to the axis of the lid cylinder (2313) and parallel to the axis of the sliding pin (225); The two lifting arms (234) are located in the handle groove (2323); the tops of the two lifting arms (234) are rotatably connected to the limiting pins (235) respectively, forming an inverted V-shaped structure that is centrally symmetrical; the axis of the limiting pin (235) is parallel to the axis of the box cover cantilever (2314); Two pins B (237) are arranged parallel and symmetrically at the bottom of the two lifting arms (234); each pin B (237) is capable of relative rotation with the corresponding lifting arm (234); The two rocker arm groups are symmetrically arranged on the two pin shafts B (237); the tops of the two rocker arm groups are rotatably connected to the box cover cantilever (2314), and the bottoms of the two rocker arm groups are plugged into the corresponding two sliding pins (225); The handle (232) is used to drive the arm (234) to move up and down; When the lifting arm (234) moves upward and enters the box cover cylinder (2313), the V-shaped opening end is tightened; when the lifting arm (234) moves downward and leaves the box cover cylinder (2313), the V-shaped opening end is opened; When the V-shaped opening end is tightened, the two rocker arm groups move the sliding pin (25) inward along the slide rail (2211); when the V-shaped opening end is opened, the two rocker arm groups move the sliding pin (225) outward.

5. A box cover lock structure as claimed in claim 4, characterized in that: When the V-shaped opening end is opened, the size of the opening end is larger than the inner diameter (2316) of the box cover tube; when the V-shaped opening end is tightened, the size of the opening end is smaller than the inner diameter (2316) of the box cover tube.

6. A box cover lock structure as claimed in claim 4, characterized in that: The unlocking mechanism (23) further includes: a spring B (233); The spring B (233) is sleeved outside the lifting arm (234); the top of the spring B (233) abuts against the lower end surface of the box cover (2311), and the bottom of the spring B (233) abuts against the two lifting arms (234).

7. A box cover lock structure as claimed in claim 4, characterized in that: The rocker arm assembly includes: two rocker arms (236) arranged opposite to each other; The two rocker arms (236) of the same group are symmetrically arranged at the two ends of the corresponding pin shafts B (237); Each rocker arm (236) is provided with a rocker arm hole A (2361) and a rocker arm hole B (2362) at the top, and a rocker arm long slot (2363) at the bottom; The top of the rocker arm (236) is rotatably connected to the corresponding cantilever arm (2314) of the box cover through the rocker arm hole A (2361), and is fixedly connected to the pin B (237) through the rocker arm hole B (2362); The bottom of the rocker arm (236) is plugged into the corresponding sliding pin (225) through the rocker arm long slot (2363).

8. A box cover lock structure as claimed in claim 7, characterized in that: The top of the rocker arm (236) is offset inwardly relative to the bottom thereof.

9. A box cover lock structure according to any one of claims 3 to 8, characterized in that: The end of the lock tongue (224) facing the outside of the lock slot (221) is provided with a slope (2242), so that the lock tongue (224) is tightened inwardly as the lock seat (1) is squeezed.

10. A box cover lock structure according to any one of claims 3 to 8, characterized in that: The locking mechanism (22) further includes: a limiting column (223); The limiting column (223) is coaxially arranged in the spring A (222); The sum of the axial length of the limiting column (223) and the length of the two locking tongues (224) is greater than the length of the locking groove (221).

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