Special small size straight key lock for cabinet door of rail transit vehicle

Abstract

The utility model relates to rail transit technical field, concretely relates to a small -sized one key lock of rail transit vehicle cabinet door special use. The utility model discloses the cabinet door board of rail transit vehicle and install in the lock head composition and the lock tongue composition of cabinet door board both sides, the lock head composition includes the lock body and is located in the lock cylinder composition in the lock body, the lock tongue composition includes the turning tongue connected with the linkage shaft, the turning tongue forms the turning tongue lock and is separately extended along the linkage shaft outward, or the turning tongue forms three -point lock and is additionally equipped with two parallel lock rods along the linkage shaft outward. The utility model discloses the lock head composition is compact, and the diameter is reduced greatly, and the volume reduces about 65%, saves the installation space, and adapts the limited space of rail transit vehicle, and the lock tongue composition can form the turning tongue lock or three -point lock, satisfies the demand of different height cabinet door, improves the applicability of lock, and the unique pin hole and the setting of positioning pin, enhance the security of lock, prevent illegal opening.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a miniaturized single-key lock for the cabinet doors of rail transit vehicles. Background Technology

[0002] Lockers and equipment cabinets in rail transit vehicles are mostly equipped with mechanical pin tumbler locks. To facilitate key management and operation by crew members, a single-sided key conforming to railway industry standards and a seven-pin tumbler structure are commonly used to standardize the key design. For example, Chinese patent CN105625836A discloses a single-control side-sliding door isolation lock for high-speed trains. However, existing locker door locks have several problems: First, they are bulky, with traditional lock cylinders having a diameter of approximately 55mm, resulting in large installation holes that are unsightly and inconsistent with the vehicle's interior design philosophy; second, installation is inconvenient, as the large opening affects the strength of the locker door material, requiring precise positioning and more space; third, they lack flexibility, with most offering only single functions, and three-point locking of tall lockers requiring additional complex mechanisms. While civilian pin tumbler locks are technologically mature and low-cost, their protective capabilities are weak, and traditional structures are easily unlocked using technical methods, resulting in a low level of security. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a miniaturized single-key lock for the cabinet door of rail transit vehicles.

[0004] The technical solution adopted in this utility model is as follows: A miniaturized single-key lock for rail transit vehicle cabinet doors includes a cabinet door panel of the rail transit vehicle, and a lock head assembly and a lock tongue assembly installed on both sides of the cabinet door panel. The lock head assembly includes a lock body and a lock cylinder assembly located within the lock body. The lock cylinder assembly includes a columnar lock cylinder body with seven pin holes on its upper and lower sides, three pin holes on the upper side and four pin holes on the lower side. Each pin hole contains a positioning pin, a small pin positioning sleeve, and is sealed with a stop. The lock tongue assembly includes a rotating tongue connected to a linkage shaft. The rotating tongue extends outward along the linkage shaft to form a rotating tongue lock, or the rotating tongue is fitted with two parallel locking rods outward along the linkage shaft to form a three-point lock.

[0005] This technical solution features seven pin holes on the upper and lower sides of the lock cylinder body, each containing a positioning pin and a small pin positioning sleeve, sealed with a stop block to create a unique unlocking mechanism. In use, inserting the correct flat key positions each pin, allowing the lock cylinder to rotate and drive the linkage shaft, which in turn controls the movement of the rotary latch or the bolt of a three-point lock, thus locking or unlocking the cabinet door. The lock head is compact, with its diameter reduced from 55mm to 32mm, resulting in a 65% reduction in volume and saving installation space, making it suitable for the limited space of rail transit vehicles. The bolt configuration can form either a rotary latch lock or a three-point lock, meeting the needs of cabinet doors of different heights and improving the lock's applicability. The unique pin hole and positioning pin design enhances lock security and prevents unauthorized opening.

[0006] In addition, the miniaturized single-key lock for rail transit vehicle cabinet doors proposed above according to this utility model may also have the following additional technical features: According to one embodiment of the present invention, the lock head assembly further includes an internal tooth locking washer and a sealing gasket, and the lock body passes through the cabinet door panel and is clamped between the internal tooth locking washer and the sealing gasket.

[0007] In this technical solution, the internal tooth locking washer utilizes its internal tooth structure. When installed with the lock body, the internal teeth can embed into the corresponding parts of the lock body or cabinet door panel, generating significant friction and mechanical engagement force. This prevents the lock body from loosening or falling off, enhancing the stability of the lock assembly. The sealing gasket, relying on its own elasticity, fills the gap between the lock body and the cabinet door panel, providing a seal. This effectively prevents dust and moisture from entering the lock body, avoiding rust and damage to internal parts due to external environmental factors, ensuring long-term stable operation of the lock, and extending its service life.

[0008] According to one embodiment of the present invention, the lock further includes a hexagonal bolt and a hexagonal nut. The hexagonal bolt is located on the back of the internal tooth locking washer, and it is sleeved on the lock body and applies a preload to the internal tooth locking washer, so that the internal tooth locking washer is tightly attached to the cabinet door panel. The hexagonal nut is located on the outside of the latch, and the latch assembly is fixed to the end of the linkage shaft by a spring washer, so that the latch assembly and the lock head assembly rotate synchronously.

[0009] In this technical solution, the hexagonal bolt is located behind the internal tooth locking washer and fits onto the lock body. When the hexagonal bolt is rotated, its axial movement applies a preload to the internal tooth locking washer. Under pressure, the internal teeth of the locking washer embed more tightly into the lock body or cabinet door panel, increasing friction and preventing the lock body from loosening. The hexagonal nut is located on the outside of the latch, and together with a spring washer, it secures the latch assembly to the end of the linkage shaft. The elasticity of the spring washer prevents the nut from loosening, ensuring a stable connection between the latch assembly and the linkage shaft. It also allows power to be transmitted through the linkage shaft, enabling synchronous rotation with the lock head assembly to complete the unlocking and locking actions.

[0010] According to one embodiment of the present invention, the lock cylinder assembly further includes a lock cylinder outer sleeve and a lock cylinder positioning sleeve. The lock cylinder outer sleeve is provided with a small column positioning sleeve and a spring. The upper side of the lock cylinder outer sleeve is provided with three pin holes and the lower side is provided with four pin holes. One end of the spring abuts against the positioning pins, and the other end of the spring abuts against the small column positioning sleeve. Two stop blocks are provided, which are respectively laterally limited to the outside of the three upper pin holes and the four lower pin holes. The stop blocks are limited to the surface of the lock cylinder body by the lock cylinder positioning sleeve.

[0011] This technical solution involves setting a pin hole, a small pin positioning sleeve, and a spring on the outer casing of the lock cylinder. The spring force is used to dynamically stabilize the positioning pin within the pin hole. When the correct key is inserted, the pin is pushed to change its position. Then, the stop block and the lock cylinder positioning sleeve are used to limit and fix the pin hole and internal components, thereby achieving precise opening and locking of the lock cylinder.

[0012] According to one embodiment of the present invention, the lock cylinder assembly further includes a lock cylinder cover and a retaining ring. The end of the lock cylinder cover is provided with a straight keyhole that is consistent with the lock cylinder body. The retaining ring separates the linkage shaft from the lock cylinder body by means of a spring washer. The linkage shaft is fixed to the end of the lock cylinder body by means of a pin.

[0013] In this technical solution, the end of the lock cylinder cover is provided with a single-sided keyhole that matches the lock cylinder body. This is to ensure that the correct key can be smoothly inserted into the lock cylinder body for unlocking operations. A retaining ring, using a spring washer, separates the linkage shaft from the lock cylinder body. The spring washer, utilizing its own elasticity, buffers external forces, preventing excessive wear between the linkage shaft and the lock cylinder body due to direct contact, and also provides a certain degree of anti-loosening. The linkage shaft is fixed to the end of the lock cylinder body by a pin. The pin serves a positioning and connecting function, ensuring a stable connection between the linkage shaft and the lock cylinder body. When the lock cylinder body rotates, the linkage shaft rotates synchronously, thereby driving the bolt to move and opening / closing the lock.

[0014] According to one embodiment of the present invention, both the lock body and the lock cylinder positioning sleeve are provided with rivet holes, and the lock body and the lock cylinder positioning sleeve are riveted together by rivets to form a compact lock head assembly.

[0015] In this technical solution, after the rivet is inserted into the rivet hole, it is deformed by external force, and its head and tail expand and are tightly stuck in the rivet holes of the lock body and the lock cylinder positioning sleeve. The friction and mechanical interlocking force generated by the material deformation are used to firmly fix the two together.

[0016] Compared with the prior art, this utility model has the following advantages: The lock head of this utility model is compact, with a significantly reduced diameter and volume of approximately 65%, saving installation space and adapting to the limited space of rail transit vehicles; the lock tongue can form a rotary lock or a three-point lock to meet the needs of cabinet doors of different heights and improve the applicability of the lock; the unique pin hole and positioning pin settings enhance the security of the lock and prevent unauthorized opening. Attached Figure Description

[0017] Figure 1 This is an assembly drawing of this utility model.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is an assembly diagram of the lock cylinder.

[0020] Figure 4 This is an assembly diagram of the lock cylinder.

[0021] Figure 5 This is a cross-sectional view of the lock cylinder.

[0022] In the diagram: 1. Lock head components; 11. Lock body; 12. Lock cylinder components; 121. Lock cylinder cover; 122. Lock cylinder body; 123. Positioning pins; 124. Lock cylinder outer sleeve; 125. Small pin positioning sleeve; 126. Lock cylinder positioning sleeve; 127. Retaining ring; 128. Pin; 129. Linkage shaft; 2. Lock tongue components; 3. Key; 4. Internal tooth locking washer; 5. Hex bolt; 6. Cabinet door panel; 7. Sealing gasket; 8. Hex nut. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1 like Figures 1 to 5As shown, this embodiment provides a miniaturized single-key lock for rail transit vehicle cabinet doors, including a rail transit vehicle cabinet door panel 6, and a lock head assembly 1 and a lock tongue assembly 2 installed on both sides of the cabinet door panel 6. The lock head assembly 1 includes a lock body 11 and a lock cylinder assembly 12 located within the lock body 11. The lock cylinder assembly 12 includes a lock cylinder body 122 arranged in a columnar shape. The lock cylinder body 122 has seven pin holes on its upper and lower sides, with three pin holes on the upper side and four pin holes on the lower side. Each pin hole contains a positioning pin 123 and a small pin positioning sleeve 125, which are sealed with a stop iron. The lock tongue assembly 2 includes a rotating tongue connected to a linkage shaft 129. The rotating tongue extends outward along the linkage shaft 129 to form a rotating tongue lock, or the rotating tongue is fitted with two parallel locking rods outward along the linkage shaft 129 to form a three-point lock.

[0025] like Figures 1 to 5 As shown, this technical solution forms a unique unlocking mechanism by setting seven pin holes on the upper and lower sides of the lock cylinder body 122, placing positioning pins 123 and small pin positioning sleeves 125 respectively, and then sealing them with stop blocks. In use, inserting the correct flat key positions each pin, allowing the lock cylinder to rotate and drive the linkage shaft 129, thereby controlling the movement of the rotary latch or the latch portion of the three-point lock to lock or unlock the cabinet door. The lock head assembly 1 is compact, with its diameter reduced from 55mm to 32mm, resulting in a volume reduction of approximately 65%, saving installation space and adapting to the limited space of rail transit vehicles. The latch assembly 2 can form a rotary latch lock or a three-point lock, meeting the needs of cabinet doors of different heights and improving the lock's applicability. The unique pin hole and positioning pin 123 settings enhance the lock's security and prevent unauthorized opening.

[0026] In addition, the miniaturized single-key lock for rail transit vehicle cabinet doors proposed above according to this utility model may also have the following additional technical features: like Figure 3 As shown, the lock head assembly 1 also includes an internal tooth locking washer 4 and a sealing gasket 7, and the lock body 11 passes through the cabinet door panel 6 and is clamped between the internal tooth locking washer 4 and the sealing gasket 7.

[0027] In this technical solution, the internal tooth locking washer 4 utilizes its internal tooth structure. When installed with the lock body 11, the internal teeth can embed into the corresponding parts of the lock body 11 or the cabinet door panel 6, generating significant friction and mechanical engagement force. This prevents the lock body 11 from loosening or falling off, enhancing the stability of the lock head assembly 1. The sealing gasket 7, relying on its own elasticity, fills the gap between the lock body 11 and the cabinet door panel 6, providing a seal. This effectively prevents dust, moisture, and other contaminants from entering the interior of the lock body 11, avoiding rust and damage to internal parts due to external environmental factors. This ensures long-term stable operation of the lock and extends its service life.

[0028] like Figure 3As shown, the lock also includes a hexagonal bolt 5 and a hexagonal nut 8. The hexagonal bolt 5 is located on the back of the internal tooth locking washer 4, and it is sleeved on the lock body 11 and applies a preload to the internal tooth locking washer 4, so that the internal tooth locking washer 4 is tightly attached to the cabinet door panel 6. The hexagonal nut 8 is located on the outside of the lock tongue, and the lock tongue assembly 2 is fixed to the end of the linkage shaft 129 by a spring washer, so that the lock tongue assembly 2 and the lock head assembly 1 rotate synchronously.

[0029] In this technical solution, the hexagonal bolt 5 is located on the back of the internal tooth locking washer 4 and is fitted onto the lock body 11. When the hexagonal bolt 5 is rotated, its axial movement applies a preload to the internal tooth locking washer 4. After the internal tooth locking washer 4 is compressed, the internal teeth are more tightly embedded in the lock body 11 or cabinet door panel 6, increasing friction and preventing the lock body 11 from loosening. The hexagonal nut 8 is located on the outside of the latch, and together with the spring washer, it fixes the latch assembly 2 to the end of the linkage shaft 129. The elasticity of the spring washer makes the nut less prone to loosening, ensuring a stable connection between the latch assembly 2 and the linkage shaft 129, and enabling power to be transmitted through the linkage shaft 129 to achieve synchronous rotation with the lock head assembly 1, completing the unlocking and locking actions.

[0030] like Figure 4 and Figure 5 As shown, the lock cylinder assembly 12 also includes a lock cylinder outer sleeve 124 and a lock cylinder positioning sleeve 126. The lock cylinder outer sleeve 124 is provided with a small column positioning sleeve 125 and a spring. The upper side of the lock cylinder outer sleeve 124 is provided with three pin holes and the lower side is provided with four pin holes. One end of the spring abuts against the positioning pin 123, and the other end of the spring abuts against the small column positioning sleeve 125. Two stop blocks are provided, which are respectively laterally limited to the outside of the three upper pin holes and the four lower pin holes. The stop blocks are limited to the surface of the lock cylinder body 122 by the lock cylinder positioning sleeve 126.

[0031] This technical solution uses a tumbler hole, a small column positioning sleeve 125, and a spring in the lock cylinder outer sleeve 124. The spring force keeps the positioning tumbler 123 dynamically stable in the tumbler hole. When the correct key 3 is inserted, it pushes the tumbler to change its position. Then, the stop block and the lock cylinder positioning sleeve 126 limit and fix the tumbler hole and internal components, so as to achieve accurate opening and locking of the lock cylinder.

[0032] like Figure 4 and Figure 5 As shown, the lock cylinder assembly 12 also includes a lock cylinder cover 121 and a retaining ring 127. The end of the lock cylinder cover 121 is provided with a straight keyhole that is consistent with the lock cylinder body 122. The retaining ring 127 separates the linkage shaft 129 from the lock cylinder body 122 by means of a spring washer. The linkage shaft 129 is fixed to the end of the lock cylinder body 122 by means of a pin 128.

[0033] In this technical solution, the end of the lock cylinder cover is provided with a single-line keyhole that matches the lock cylinder body 122. This is to match the correct key and ensure that the key can be smoothly inserted into the lock cylinder body 122 for unlocking operations. The retaining ring 127 uses a spring washer to separate the linkage shaft 129 from the lock cylinder body 122. The spring washer utilizes its own elasticity to buffer external forces, preventing excessive wear between the linkage shaft 129 and the lock cylinder body 122 due to direct contact, and also provides a certain degree of anti-loosening. The linkage shaft 129 is fixed to the end of the lock cylinder body 122 by a pin 128. The pin 128 serves a positioning and connecting function, ensuring that the linkage shaft 129 is stably connected to the lock cylinder body 122. When the lock cylinder body 122 rotates, the linkage shaft 129 rotates synchronously, thereby driving the bolt to move and realizing the opening and closing of the lock.

[0034] like Figure 3 As shown, both the lock body 11 and the lock cylinder positioning sleeve 126 are provided with rivet holes. The rivet holes are used to rivet the lock body 11 and the lock cylinder positioning sleeve 126 together to form a compact lock head assembly 1.

[0035] In this technical solution, after the rivet is inserted into the rivet hole, it is deformed by external force, and its head and tail expand and are tightly stuck in the rivet holes of the lock body 11 and the lock cylinder positioning sleeve 126. The friction and mechanical interlocking force generated by the material deformation are used to firmly fix the two together.

[0036] The usage process of the above embodiments is as follows: Figures 1 to 5 As shown, during installation, the lock body 11 penetrates the cabinet door panel 6 and is clamped between the internal tooth locking washer 4 and the sealing gasket 7. A hexagonal bolt 5 is fitted onto the lock body 11 to apply pressure to the internal tooth locking washer 4, causing its internal teeth to embed into the lock body 11 or the cabinet door panel 6 to prevent loosening. The sealing gasket 7 fills the gap for sealing. A hexagonal nut 8, in conjunction with a spring washer, fixes the latch assembly 2 to the end of the linkage shaft 129. The lock body 11 and the lock cylinder positioning sleeve 126 are riveted together to form a compact lock head assembly 1. When unlocking, the correct flat key is inserted into the flat keyhole of the lock cylinder cover 121, entering the lock cylinder body 122 and pushing the positioning pins 123, so that each pin is in the correct position under the action of the spring. The lock cylinder can rotate, driving the linkage shaft 129, which in turn drives the rotating bolt or the bolt of a three-point lock to unlock the cabinet door. When locking, the lock cylinder is rotated in the opposite direction, driving the bolt back to its original position via the linkage shaft 129, thus locking the cabinet door. The entire process relies on the close cooperation of all components to ensure the stable operation of the lock.

[0037] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. A miniaturized single-key lock for a rail transit vehicle cabinet door, comprising a rail transit vehicle cabinet door panel (6), and a lock head assembly (1) and a lock tongue assembly (2) installed on both sides of the cabinet door panel (6), characterized in that, The lock cylinder assembly (1) includes a lock body (11) and a lock cylinder assembly (12) located within the lock body (11); the lock cylinder assembly (12) includes a lock cylinder body (122) arranged in a columnar shape, and the lock cylinder body (122) has a total of seven pin holes on its upper and lower sides, with three pin holes on the upper side and four pin holes on the lower side; each pin hole contains a positioning pin (123) and a small pin positioning sleeve (125) and is sealed with a stop iron; the latch assembly (2) includes a rotating tongue connected to the linkage shaft (129); the rotating tongue extends outward along the linkage shaft (129) to form a rotating tongue lock, or the rotating tongue is fitted with two parallel locking rods outward along the linkage shaft (129) to form a three-point lock.

2. The miniaturized single-key lock for rail transit vehicle cabinet doors as described in claim 1, characterized in that, The lock head assembly (1) also includes an internal tooth locking washer (4) and a sealing gasket (7), and the lock body (11) passes through the cabinet door panel (6) and is clamped between the internal tooth locking washer (4) and the sealing gasket (7).

3. The miniaturized single-key lock for rail transit vehicle cabinet doors as described in claim 2, characterized in that, The lock also includes a hex bolt (5) and a hex nut (8). The hex bolt (5) is located on the back of the internal tooth locking washer (4), which is fitted onto the lock body (11) and applies a preload to the internal tooth locking washer (4), so that the internal tooth locking washer (4) is tightly attached to the cabinet door panel (6). The hex nut (8) is located on the outside of the latch, and the latch assembly (2) is fixed to the end of the linkage shaft (129) by a spring washer, so that the latch assembly (2) and the lock head assembly (1) rotate synchronously.

4. The miniaturized single-key lock for rail transit vehicle cabinet doors as described in claim 1, characterized in that, The lock cylinder assembly (12) also includes a lock cylinder outer sleeve (124) and a lock cylinder positioning sleeve (126). The lock cylinder outer sleeve (124) is provided with a small column positioning sleeve (125) and a spring. The upper side of the lock cylinder outer sleeve (124) is provided with three pin holes and the lower side is provided with four pin holes. One end of the spring abuts against the positioning pin (123) and the other end of the spring abuts against the small column positioning sleeve (125). Two stop blocks are provided, which are respectively laterally limited to the outside of the three upper pin holes and the four lower pin holes. The stop blocks are limited to the surface of the lock cylinder body (122) by the lock cylinder positioning sleeve (126).

5. The miniaturized single-key lock for rail transit vehicle cabinet doors as described in claim 1 or 4, characterized in that, The lock cylinder assembly (12) also includes a lock cylinder cover (121) and a retaining ring (127). The end of the lock cylinder cover (121) is provided with a straight keyhole that matches the lock cylinder body (122). The retaining ring (127) separates the linkage shaft (129) from the lock cylinder body (122) by means of a spring washer. The linkage shaft (129) is fixed to the end of the lock cylinder body (122) by means of a pin (128).

6. The miniaturized single-key lock for rail transit vehicle cabinet doors as described in claim 4, characterized in that, Both the lock body (11) and the lock cylinder positioning sleeve (126) are provided with rivet holes. The rivet holes are used to rivet the lock body (11) and the lock cylinder positioning sleeve (126) together to form a compact lock head assembly (1).

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