Rotary locking mechanism for special vehicle cabinet door

Abstract

The utility model discloses a kind of special vehicle cabinet door with screw-in locking mechanism, it is related to special vehicle technical field, to provide a kind of locking mechanism with strong impact resistance and reliable locking.The utility model is realized by the following technical scheme: lock shell passes through the installation hole that special vehicle cabinet door is previously opened, then lock shell is fixed by matched fastening nut, lock cylinder tail portion thread is screwed into lock shell internal thread hole, and pass through lock shell.When needing to close tool box door and lock, key is sleeved into the triangular head or hexagonal head of lock cylinder head, and lock cylinder is rotated clockwise according to the locking instruction arrow direction of lock shell plane, lock cylinder tail portion lock cylinder thread is screwed into the lock seat thread hole on box, the locking of cabinet door can be realized.When needing to open cabinet door, key is sleeved into the head of lock cylinder, and lock cylinder is rotated counterclockwise according to the unlocking instruction arrow direction of lock shell plane, lock cylinder tail portion lock cylinder thread is separated from the lock seat thread hole on box, and the opening of cabinet door can be realized.

Description

Technical Field

[0001] This utility model relates to the field of special vehicle technology, specifically to a screw-in locking mechanism for special vehicles. Background Technology

[0002] Locking mechanisms are widely used in both civilian and military industries, serving as an indispensable component of various cabinets and enclosures. In the field of civilian electrical equipment, they are used in industrial control cabinets, power equipment boxes, and communication equipment cabinets. The screw-in locking mechanism for special vehicle cabinet doors is a device used on special vehicles that connects and locks components through rotation. It can be used to lock the hatches and turrets of tanks, armored vehicles, and other weaponry, as well as to secure the upper compartments of military transport vehicles, ensuring the stability and safety of equipment during combat and transportation. It can also be used in engineering rescue fields, such as fire trucks, ambulances, and disaster relief vehicles, to secure various rescue equipment and equipment boxes, ensuring that the equipment does not loosen or fall during travel and operation. Common failures of screw-in locking mechanisms used in special vehicles are closely related to their working environment (such as vibration, impact, dust, high and low temperatures, etc.) and structural characteristics, mainly including the following categories:

[0003] I. Locking failure type of fault

[0004] 1. Stripped or disengaged threads

[0005] Frequent tightening / loosening can cause thread wear, or overload torque can damage the thread profile, leading to stripping and ineffective locking. Prolonged vibration in special vehicles can cause threaded connections to gradually loosen or even completely disengage, losing their securing function.

[0006] 2. Insufficient locking force

[0007] Excessive clearance in the threaded fit (such as machining errors or wear), or failure to reach the specified preload during locking, causes the mechanism to gradually loosen under vibration. Insufficient strength of the locking components (such as nuts and bolts) leads to plastic deformation under stress, making it unable to maintain the locking force.

[0008] II. Operational lag or freezing issues

[0009] 1. Thread jamming

[0010] Dust, oil, mud, and other impurities in the working environment can enter the thread gap, increasing resistance and causing jamming during screwing in and out. Low temperatures can cause grease to solidify, or high temperatures can lead to lubrication failure, further exacerbating thread friction.

[0011] 2. Structural deformation jamming

[0012] Deformation of the locking mechanism housing or connecting parts due to impact or compression can cause the thread axis to shift, resulting in jamming during screwing. Excessive assembly errors (such as excessive thread coaxiality) can exacerbate jamming after prolonged use.

[0013] III. Failures Related to Sealing and Protection

[0014] 1. Damaged seals

[0015] The sealing rings and dustproof gaskets of the locking mechanism may lose their sealing function due to aging, wear, or improper installation, allowing moisture and impurities to enter the interior. During the tightening process, the seals may be excessively compressed, causing tearing or deformation, thus affecting the protective performance.

[0016] 2. Rust and Corrosion

[0017] After a seal fails, moisture and corrosive media (such as salt spray and chemicals) come into contact with the threads or metal parts, causing surface corrosion, which further exacerbates jamming and reduces structural strength. In special environments such as marine and chemical plants, electrochemical corrosion of metal parts is accelerated, shortening their service life.

[0018] IV. Failure of accessories or auxiliary components

[0019] 1. Damaged handle or operating parts

[0020] The handle or knob of a manually screw-in mechanism may break due to frequent operation or excessive force, rendering it unusable. In electrically / pneumatically driven locking mechanisms, malfunctions in the transmission gears or motor may cause operational failure.

[0021] 2. Positioning and limit failure

[0022] Wear or detachment of the locating pins and stop blocks in the locking mechanism can lead to inaccurate locking positions and unreliable fixation.

[0023] The core causes of these failures are mostly related to environmental erosion, mechanical wear, assembly errors, and material defects. In daily maintenance, we need to focus on cleaning and lubrication, sealing inspection, and regular strength testing to reduce the occurrence of failures.

[0024] Currently, the most commonly used locking mechanisms in the automotive industry are mainly divided into: latch type, rotary latch type, impact type, and pin type, depending on their application location, structure, and function. Existing special vehicle compartment doors still use civilian-grade triangular rotary latch locks, sometimes requiring multiple rotations to lock or unlock. Compared to quick-locking mechanisms like latches and pins, this is slower and less efficient, unsuitable for scenarios requiring frequent and rapid operation. Due to the extremely harsh operating conditions and environments of special vehicles, ordinary civilian triangular rotary latch locks are prone to deformation or even breakage under strong vibration and impact, causing the compartment door to spring open. This poses a significant risk to the use of special vehicles and greatly inconveniences and increases maintenance costs. Long-term high-frequency use or overload locking can cause the threads to wear, deform, or even strip due to excessive force, affecting locking reliability and requiring regular inspection and replacement. Utility Model Content

[0025] The purpose of this utility model is to address the problems existing in the prior art by providing a locking mechanism that is easy to install, simple to operate, has strong impact resistance, and is reliable in locking, so as to solve the problems of special vehicle cabinet doors not closing tightly or automatically opening due to vibration and impact during use.

[0026] The technical solution adopted by this utility model to solve its technical problem is: a screw-in locking mechanism for special vehicle cabinet doors, comprising: a screw-locking mechanism and a limiting pin mechanism passing through the mounting hole of the special vehicle cabinet door, characterized in that: the lock cylinder of the screw-locking mechanism has a lock shaft with a T-shaped ring, which passes through the hollow stepped hole of the lock shell and sits on the sealing ring at the bottom of the T-shaped hole, and the lower end of the lock cylinder has a lock cylinder thread, which is 18. The lock shaft of the utility model, through the T-shaped hole utility model 13 utility model partition wall, forms a lock body extending out of the stepped hole body. It is inserted into the lock seat threaded hole set on the special vehicle box body, and the fastening nut utility model 6 utility model is screwed into the lock shell utility model 1 utility model through the lock shell thread utility model 10 utility model, and the lock shell utility model 1 utility model is fixed to the special vehicle box door. Then, the locking pin utility model 7 utility model is screwed into the locking threaded hole utility model 19 utility model to lock the lock shell utility model 1 utility model on the box door.

[0027] Compared with the prior art, this utility model has the following advantages:

[0028] Installation is quick and easy. This utility model uses a matching key inserted into the lock cylinder; a gentle rotation of the cylinder easily locks and unlocks the lock. This simple and smooth operation method allows operators to quickly and accurately lock or unlock cabinet doors without expending excessive effort or time. The top surface of the lock housing features unlocking and locking indicator arrows. The unlocking arrow is filled with green paint, and the locking arrow with red paint, resulting in a clean and aesthetically pleasing appearance. The operators can clearly see the locking and unlocking direction through the arrow indicators, greatly enhancing the user experience.

[0029] The operation is simple and extremely convenient: Installation is relatively simple; just pre-drill appropriately sized mounting holes on the toolbox door of the special vehicle, and then fix the lock housing with the matching fastening nut. This installation method does not require complex tools or professional technicians; it only requires rotation, and ordinary workers can operate it proficiently after simple training. Compared to other complex locking methods, such as tightening bolts and nuts one by one, the operation is faster, saving time and labor costs, and greatly improving installation efficiency. Moreover, it is highly repeatable and versatile. The lock housing size design fully considers the common standards of toolbox doors in special vehicles, and can adapt to toolbox doors of various materials and thicknesses, whether metal or plastic, allowing for easy installation and achieving good locking results. This feature means that special vehicles do not need large-scale modifications to the toolbox door when performing later maintenance, upgrades, or lock replacements, reducing the impact on the normal operation of the entire vehicle due to lock installation. Easy and quick to install, simple to operate, compact in structure, robust in connection, and simple and beautiful in appearance: This utility model is designed according to the operating conditions of special vehicles. The lock shell and lock cylinder are integrally formed from stainless steel. The lock cylinder head has a hexagonal head and a triangular head to accommodate different types of keys. When the correct key is inserted and the lock cylinder is turned, the key drives the lock cylinder to rotate. When the threaded end of the lock cylinder is fully screwed into the corresponding threaded hole on the door frame, the locking function is achieved. Rotating the lock cylinder in the opposite direction causes the threaded end of the lock cylinder to disengage from the corresponding threaded hole on the door frame, thereby opening the lock. This compact and efficient design can complete the locking and unlocking of the cabinet door in a short time. It can also be screwed in and out multiple times, facilitating the quick loading and unloading of equipment or replacement of parts in different operating scenarios for special vehicles.

[0030] Safe, reliable, and highly resistant to vibration and impact. The lock cylinder head of this invention features both hexagonal and triangular heads to accommodate different key opening and locking requirements. The lock cylinder is integrally formed from stainless steel, resulting in high strength and tensile strength. The tail of the lock cylinder employs a threaded structure. When the cabinet door is locked, the screw-in locking mechanism generates significant axial force and friction, ensuring a tight connection, reliable locking, and strong resistance to vibration and impact. The screw-in structure achieves locking through thread engagement, and the helix angle design of the threads provides stable axial force, effectively resisting vibration and impact. The threaded tail of the lock cylinder screws into a threaded hole on the cabinet door frame, effectively resisting vibration and impact during vehicle movement, ensuring safety and reliability. Furthermore, this invention features sealing structures both inside and outside the lock housing, providing excellent protection. Combined with sealing components, the good sealing performance effectively prevents dust and water splashes, allowing normal operation even in dusty or water-splashed environments. Highly adjustable: The tightness can be adjusted by rotation, making it easy to flexibly control the tightness according to the actual load, such as for equipment fixing and door sealing. Attached Figure Description

[0031] Figure 1 This is a three-dimensional sectional front view of the screw-in locking mechanism for special vehicle cabinet doors of this utility model;

[0032] Figure 2 This is a three-dimensional exploded cross-sectional view of the screw-in locking mechanism for special vehicle cabinet doors of this utility model;

[0033] Figure 3 This is a three-dimensional schematic diagram of the lock case;

[0034] Figure 4 This is a two-dimensional cross-sectional front view of the lock case;

[0035] Figure 5 This is a 3D schematic diagram of the lock cylinder;

[0036] Figure 6 This is a three-dimensional schematic diagram of a fastening nut.

[0037] In the diagram: 1. Lock housing, 2. Lock cylinder, 3. Sealing gasket, 4. Butterfly toothed washer, 5. Sealing ring, 6. Fastening nut, 7. Locking pin, 8. Threaded hole, 9. Limiting plane, 10. Lock housing thread, 11. Unlocking indicator arrow, 12. Locking indicator arrow, 13. T-hole, 14. Annular groove, 15. Lock cylinder relief hole, 16. Hexagonal head, 17. Triangular head, 18. Lock cylinder thread, 19. Locking threaded hole.

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention to the scope of the described embodiments. All these concepts should be considered as the content disclosed in this technology and the protection scope of this invention. Detailed Implementation

[0039] See Figures 1-2 In the preferred embodiment described below, a screw-in locking mechanism for a special vehicle compartment door includes: a screw-locking mechanism and a limiting pin mechanism passing through a mounting hole in the special vehicle compartment door. The mechanism is characterized in that: a lock cylinder (utility model 2) on the screw-locking mechanism has a lock shaft with a T-shaped ring, which passes through a hollow stepped hole in the lock housing (utility model 1) and sits on a sealing ring (utility model 5) at the bottom of the T-shaped hole (utility model 13); the lower end of the lock cylinder (utility model 2) has a lock cylinder thread (utility model 18). The locking shaft, through the T-shaped hole utility model 13 utility model partition wall, forms a lock body extending out of the stepped hole body. It is inserted into the lock seat threaded hole set on the special vehicle box body, and the fastening nut utility model 6 utility model is screwed into the lock shell utility model 1 utility model through the lock shell thread utility model 10 utility model, thus fixing the lock shell utility model 1 utility model to the special vehicle box door. Then, the locking pin utility model 7 utility model is screwed into the locking threaded hole utility model 19 utility model to lock the lock shell utility model 1 utility model on the box door.

[0040] See Figures 3-5 Utility Model 1 for lock housing has a T-shaped hole inside the hollow stepped hole; Utility Model 13 for lock housing has a sealing ring placed in the bottom annular groove; Utility Model 5 for lock housing has a threaded hole below the annular groove; Utility Model 8 for lock housing has a lock cylinder retraction hole below the threaded hole; Utility Model 15 for lock housing has a larger hole than the threaded hole.

[0041] The tail of the lock cylinder is provided with a lock cylinder thread, and the head is provided with a hexagonal head. The upper surface of the hexagonal head is provided with a triangular head for the operator to use different types of keys to rotate the lock cylinder to open and lock the toolbox door of a special vehicle.

[0042] A sealing gasket (utility model 3) is provided between the top T-shaped ring plane of the lock housing utility model 1 and the toolbox door. Below the sealing gasket (utility model 3), a butterfly-shaped toothed washer (utility model 4) is installed between the inner surface of the toolbox door and the fastening nut (utility model 6). The fastening nut (utility model 6) is screwed into the lock housing thread (utility model 10) on the lock housing utility model 1, thus fixing the lock housing utility model 1 to the toolbox door. The butterfly-shaped toothed washer (utility model 4) prevents the fastening nut (utility model 6) from loosening due to vibration during vehicle operation. The sealing gasket (utility model 3) installed between the mounting plane and the outer surface of the toolbox door effectively prevents dust and rainwater from entering the toolbox, thus providing a sealing function.

[0043] The fastening nut utility model 6 has locking threaded holes symmetrically distributed on its side, and locking pins utility model 7 are symmetrically arranged in pairs facing each other. The locking pins utility model 7 are screwed into the locking threaded holes utility model 19 and locked against the lock shell thread utility model 10 on the lock shell utility model 1, forming an interlocking limit pin mechanism. When the fastening nut utility model 6 completely fixes the lock shell utility model 1 to the toolbox door of the special vehicle, it can effectively prevent the fastening nut utility model 6 from loosening due to vibration during vehicle operation.

[0044] The lock housing thread utility model 10 has symmetrically distributed limiting planes along the generatrix direction of the lock housing utility model 1. These planes engage with corresponding components through rotation and are then fixed by a locking pin or limiting device to prevent reverse rotation and unlocking. The lock housing utility model 1 can quickly achieve limiting after passing through the mounting hole of a special vehicle's cabinet door.

[0045] The lock cylinder of utility model 2 has a threaded end that screws into the internal threaded hole of the lock housing utility model 1 and completely passes through the lock housing utility model 1, forming a component with the lock housing utility model 1. The lock cylinder of utility model 2 utilizes the engagement between the internal and external threads to slide freely on the axis of the threaded hole of the lock housing utility model 1 without coming out. When the locking component is rotated, the threads mesh with each other, generating axial force, making the connection parts fit tightly and achieving the locking function.

[0046] When it is necessary to close and lock the toolbox door, simply rotate clockwise to screw the tail thread of the lock cylinder into the threaded hole of the lock seat on the toolbox body of the special vehicle, and the toolbox door will be locked. After the toolbox door is closed and locked, the head of the lock cylinder is completely embedded in the T-shaped hole of the lock housing.

[0047] When it is necessary to open the toolbox door of the special vehicle, place the triangular key on the triangular head of the lock cylinder utility model 2 utility model 17 utility model, rotate the lock cylinder utility model 2 utility model counterclockwise, so that the lock cylinder thread utility model 18 utility model at the tail of the lock cylinder utility model 2 utility model disengages from the lock seat thread hole on the toolbox body of the special vehicle, and the lock cylinder thread utility model 18 utility model at the tail of the lock cylinder utility model 2 utility model is fully retracted into the lock cylinder relief hole utility model 15 utility model at the tail of the lock shell utility model, thus opening the toolbox door.

[0048] See Figure 6 The lock housing utility model 1 has an unlocking indicator arrow utility model 11 and a locking indicator arrow utility model 12 on its T-shaped ring surface, and the corresponding arrow heads are provided with unlocking and locking symbols. The unlocking indicator arrow utility model 11 is filled with green paint, and the locking indicator arrow utility model 12 is filled with red paint. The operator can intuitively and clearly know the unlocking and locking directions, giving the operator a better user experience.

[0049] The above description represents a preferred embodiment of this utility model. It should be noted that the above embodiments are for illustrative purposes only; however, this utility model is not limited thereto, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A screw-in locking mechanism for a special vehicle cabinet door, comprising: The locking mechanism and the limiting pin mechanism passing through the mounting hole of the special vehicle cabinet door are characterized in that: the lock cylinder (2) on the locking mechanism has a lock shaft with a T-shaped ring, which sits on the sealing ring (5) at the bottom of the T-shaped hole (13) through the hollow stepped hole inside the lock shell (1), and the lock cylinder (2) has a lock shaft with a lock cylinder thread (18) at its lower end, which forms a lock body extending out of the stepped hole body through the partition wall of the T-shaped hole (13), and is inserted into the lock seat thread hole set on the special vehicle box body by extending and screwing in. The fastening nut (6) passes through the lock shell thread (10) and is screwed into the lock shell (1) to fix the lock shell (1) to the special vehicle cabinet door. Then, the locking pin (7) is screwed into the locking thread hole (19) to lock the lock shell (1) on the cabinet door.

2. The spin-in locking mechanism for special purpose vehicle cabinet doors of claim 1, wherein: The lock housing (1) has a T-shaped hole (13) inside the hollow stepped hole, a sealing ring (5) placed in the bottom annular groove (14), and a threaded hole (8) below the annular groove (14), and a lock cylinder relief hole (15) larger than the threaded hole (8) is provided below the threaded hole (8).

3. The screw-in locking mechanism for special vehicle compartment doors as described in claim 1, characterized in that: The tail of the lock cylinder (2) is provided with a lock cylinder thread (18), and the head is provided with a hexagonal head (16). On the upper surface of the hexagonal head (16), there is a triangular head (17) that allows the operator to use different types of keys to rotate the lock cylinder (2) to open and lock the special vehicle cabinet door.

4. The screw-in locking mechanism for special vehicle compartment doors as described in claim 1, characterized in that: A sealing gasket (3) is provided between the T-shaped ring plane at the top of the lock housing (1) and the toolbox door. Below the sealing gasket (3) is a butterfly toothed washer (4) installed between the inner surface of the special vehicle toolbox door and the fastening nut (6). The fastening nut (6) is screwed into the lock housing thread (10) on the lock housing (1) to fix the lock housing (1) and the special vehicle toolbox door. The butterfly toothed washer (4) can prevent the fastening nut (6) from loosening due to vibration during vehicle operation. The sealing gasket (3) is installed between the mounting plane and the outer surface of the special vehicle toolbox door, which can effectively prevent dust and rainwater from entering the toolbox and play a sealing role.

5. The spin-in locking mechanism for special purpose vehicle cabinet doors of claim 4, wherein: The fastening nut (6) has locking threaded holes (19) symmetrically distributed on its side. The locking pins (7) are symmetrically arranged in pairs facing each other. The locking pins (7) are screwed into the locking threaded holes (19) and locked against the lock shell threads (10) on the lock shell (1), forming an interlocking limit pin mechanism. When the fastening nut (6) completely fixes the lock shell (1) to the toolbox door of the special vehicle, it can effectively prevent the fastening nut (6) from loosening due to vibration during vehicle operation.

6. The screw-in locking mechanism for special vehicle compartment doors as described in claim 5, characterized in that: The lock housing thread (10) has symmetrically distributed limiting planes (9) in the direction of the lock housing (1) generatrix. After passing through the mounting hole of the toolbox door of the special vehicle, it can quickly achieve the limiting. By rotating the fastening nut (6) to engage with the lock housing thread (10), and then by locking pin (7) to fix the fastening nut (6) to prevent it from rotating in the opposite direction and loosening.

7. The screw-in locking mechanism for special vehicle compartment doors as described in claim 1, characterized in that: The lock cylinder thread (18) at the tail of the lock cylinder (2) is screwed into the internal threaded hole (8) of the lock housing (1) and completely passes through the lock housing (1), forming a component with the lock housing (1). The lock cylinder (2) can slide freely on the axis of the threaded hole (8) of the lock housing (1) without coming out by means of the engagement between the internal and external threads. When the lock cylinder (2) is rotated, the lock cylinder thread (18) at the tail of the lock cylinder (2) meshes with the lock seat thread set on the special vehicle body, generating axial force and realizing the locking function.

8. The spin-in locking mechanism for special vehicle cabinet doors of claim 1, wherein: When it is necessary to close and lock the toolbox door, simply rotate clockwise to screw the lock cylinder (2) tail thread (18) into the lock seat thread hole set on the special vehicle body, and the toolbox door will be locked. After the special vehicle toolbox door is closed and locked, the head of the lock cylinder (2) is completely buried in the T-shaped hole (13) of the lock shell (1).

9. The spin-in locking mechanism for special vehicle cabinet doors of claim 1, wherein: When it is necessary to open the toolbox door of the special vehicle, put the triangular key on the triangular head (17) of the lock cylinder (2), rotate the lock cylinder (2) counterclockwise, so that the lock cylinder thread (18) at the tail of the lock cylinder (2) disengages from the lock seat thread hole on the toolbox body of the special vehicle, and so that the lock cylinder thread (18) at the tail of the lock cylinder (2) is completely retracted into the lock cylinder relief hole (15) at the tail of the lock shell (1) to open the toolbox door.

10. The screw-in locking mechanism for special vehicle compartment doors as described in claim 1, characterized in that: The lock housing (1) has an unlocking indicator arrow (11) and a locking indicator arrow (12) on its T-shaped ring surface, and unlocking and locking symbols are provided at the heads of the corresponding arrows. The unlocking indicator arrow (11) is filled with green paint, and the locking indicator arrow (12) is filled with red paint. The operator can intuitively and clearly know the unlocking and locking directions.

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