Door lock with large locking force and smooth rotation

Abstract

The utility model discloses a door lock that rotates smoothly and has great locking force, which is characterized in that it comprises a lock body, a rotating rod, a lock piece and a knob. The lock body is provided with a rotating body coaxial with the lock body and capable of rotating relative to the lock body, a transmission ring located in the inner cavity of the rotating body and connected coaxially with the rotating body and provided with internal threads, and the rotating rod penetrates the rotating body and cannot rotate relative to the rotating body. The part of the rotating rod penetrating the inner cavity of the rotating body is threadedly connected with the transmission ring. The end of the knob extending into the lock body is provided with an extension body capable of extending into the transmission ring. The outer wall of the extension body is provided with a main driving block and a secondary driving block respectively adjacent to the two ends of the extension body. The inner wall of the transmission ring is provided with a driving ring matching the outer diameter of the extension body. The driving ring is provided with a driving hole for the secondary driving block to pass through. The inner diameter of the extension body is greater than the diameter of the rotating rod. The end face of the rotating body away from the lock piece is provided with a driving groove for accommodating the main driving block. The utility model solves the problem of difficult locking and easy damage of the lock piece in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of energy storage cabinet door lock technology, and more specifically to a door lock that rotates smoothly and has a strong locking force. Background Technology

[0002] Existing containerized energy storage cabinet doors are a type of high-sealing door, primarily used in vans, containers, and cargo ships. These cabinets require significant locking force. The door lock includes a locking plate that engages with the cabinet body, a rotating rod connected to the locking plate, a lock body fixedly connected to the door, and a knob that operates in conjunction with the rotating rod. One end of both the rotating rod and the knob is confined within the lock body, and both can rotate relative to the lock body. During use, rotating the knob causes both the locking plate and the rotating rod to rotate, until the locking plate is in contact with the cabinet body, thus securing the door. The door and cabinet close tightly, but existing technology has flaws. Due to the large locking force required, the distance between the locking plate and the cabinet surface is small or zero. During rotation, the locking plate slides relative to the cabinet surface and undergoes bending deformation, requiring a large force to be applied to the knob, making rotation difficult. After frequent opening and closing, the structural strength of the locking plate decreases and irreversible deformation occurs. The surface of the cabinet used to fasten the locking plate is worn, resulting in an increase in the distance between the locking plate and the cabinet surface, a decrease in locking force, and a decrease in the tightness of the cabinet door and cabinet, affecting the normal use of the energy storage cabinet. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a door lock with smooth rotation, stable locking plate and cabinet structure, and strong locking force.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a door lock with smooth rotation and strong locking force, comprising a lock body fixedly connected to a cabinet door, a rotating rod rotatably connected to the lock body, a lock plate positioned on one end of the rotating rod, and a knob one end confined within the lock body and capable of linkage with the rotating rod. The lock body is provided with a rotating body coaxial with the lock body and capable of rotating relative to the lock body, and a transmission ring located within the inner cavity of the rotating body, coaxially connected to the rotating body, and machined with internal threads. The rotating rod passes through the rotating body and cannot rotate relative to the rotating body. The portion of the rotating rod that penetrates the inner cavity of the rotating body is threadedly connected to the transmission ring. The end of the knob extending into the lock body is provided with an extension body capable of extending into the transmission ring. The outer wall of the extension body is provided with a main drive block and a secondary drive block, respectively, near both ends of the extension body. The inner wall of the transmission ring is provided with a drive ring that matches the outer diameter of the extension body. The drive ring is provided with a drive hole for the secondary drive block to pass through. The inner diameter of the extension body is larger than the diameter of the rotating rod. The end face of the rotating body away from the locking plate is provided with a drive groove for the main drive block to be accommodated. The main drive block engages with the drive groove, causing the knob to drive the rotating body, the rotating rod, the locking plate, and the transmission ring to rotate relative to the lock body. By engaging the secondary drive block with the drive hole and separating the main drive block and the drive groove, the knob drives the transmission ring to rotate relative to the rotating rod and the rotating body, thereby realizing the linear movement of the locking plate with the rotating rod.

[0005] As a further improvement of this utility model, both the lock body and the knob are provided with pin holes for inserting the same pin.

[0006] As a further improvement of this utility model, the rotating body includes an outer cylinder sleeved outside the transmission ring and an inner cylinder sleeved outside the rotating rod and capable of contacting one end of the transmission ring. The inner cylinder cannot rotate relative to the outer cylinder.

[0007] As a further improvement of this utility model, the rotating rod is a prism with a square end face.

[0008] As a further improvement of this utility model, the number of the main driving block and the secondary driving block are both two, and they are symmetrically arranged relative to the plane where the axis of the extension body is located.

[0009] As a further improvement of this utility model, the two main drive blocks and the two secondary drive blocks are staggered on a circumference centered on the axis of the extension body.

[0010] The beneficial effects of this utility model are as follows: By engaging the main drive block with the drive groove, the knob drives the rotating body, the rotating rod, the lock plate, and the transmission ring to rotate relative to the lock body. By engaging the secondary drive block with the drive hole and separating the main drive block and the drive groove, the knob drives the transmission ring to rotate relative to the rotating rod and the rotating body, thus achieving linear movement of the lock plate along with the rotating rod. Compared with the prior art, this design allows for smooth rotation of the lock plate, improving the efficiency of unlocking or locking. The locking force between the lock plate and the cabinet body is adjustable and the locking is stable, improving the flexibility of opening and closing the cabinet door and cabinet body. The design that the locking force is generated on the cabinet body only after the lock plate has rotated to the correct position greatly reduces the wear phenomenon between the lock plate and the inner wall of the cabinet, indirectly improving the structural stability and service life of both the lock plate and the inner wall of the cabinet. Attached Figure Description

[0011] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a three-dimensional sectional view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is an exploded view of the present invention from another perspective.

[0012] Reference numerals in the attached diagram: 1. Lock body; 2. Rotating rod; 3. Lock plate; 4. Knob; 5. Rotating body; 51. Outer cylinder; 52. Inner cylinder; 6. Transmission ring; 7. Extension body; 8. Main drive block; 9. Secondary drive block; 10. Drive ring; 11. Drive hole; 12. Drive groove; 13. Pin hole; 14. Spring groove; 15. Limiting groove; 16. Open snap ring. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0014] Reference Figures 1 to 4 As shown, a door lock with smooth rotation and strong locking force in this embodiment includes a lock body 1 fixedly connected to the cabinet door, a rotating rod 2 rotatably connected to the lock body 1, a lock plate 3 positioned on one end of the rotating rod 2, and a knob 4 with one end limited inside the lock body 1 and capable of linkage with the rotating rod 2. Based on the aforementioned prior art, the inner cavity of the rotating body 5 is countersunk, and the inner diameter of the larger end of the inner cavity of the rotating body 5 matches the outer diameter of the transmission ring 6. The rotating rod 2 is a prism with a square end face. An external thread is machined on the outer wall of one end of the rotating rod 2. The inner contour of the smaller end of the inner cavity of the rotating body 5 is square and matches the rotating rod 2. A drive groove 12 is machined on the end face with a larger inner diameter of the rotating body 5. A threaded ring and a drive ring 10 are integrally formed on the inner wall of the transmission ring 6, which are flush with the two end faces of the transmission ring 6. The internal thread of the threaded ring matches the external thread of the rotating rod 2. A drive hole 11 is machined on the drive ring 10, which cuts off the drive ring 10. The knob 4 extends into the end of the lock body 1. The lock body 1 has an extension body 7, the outer diameter of which matches the inner diameter of the drive ring 10. The inner diameter of the extension body 7 is larger than the diameter of the rotating rod 2. The outer wall of the extension body 7 has a main drive block 8 and a secondary drive block 9 respectively adjacent to the two ends of the extension body 7. The main drive block 8 matches the drive groove 12. The secondary drive block 9 can pass through the drive hole 11. There are two main drive blocks 8 and two secondary drive blocks 9, and they are symmetrically arranged relative to the plane where the axis of the extension body 7 is located. A spring groove 14 is machined on the outer wall of the end of the knob 4 that extends into the lock body 1. A limiting groove 15 is machined on the inner wall of the lock body 1. The width of the limiting groove 15 is larger than the width of the spring groove 14. During assembly, first, the threaded part of the rotating rod 2 passes through the rotating body 5, and the threaded part of the rotating rod 2 exits from the large end of the inner cavity of the rotating body 5. Then, the transmission ring 6 is screwed onto the threaded part of the rotating rod 2. Next, the transmission ring 6 is pushed into the rotating body 5 until it contacts the rotating body 5. Then, the transmission ring 6, rotating body 5, and rotating rod 2 are installed as a whole into the lock body 1, with the rotating rod 2 exiting the lock body 1 until the rotating body 5 contacts the bottom surface of the inner cavity of the lock body 1. Finally, an open retaining spring 16 is installed corresponding to the spring groove 14, and the knob 4... The diameter of the end extending into the lock body 1 is between the inner and outer diameters of the open retaining spring 16 in its natural state. Before inserting the knob 4 into the lock body 1, a special clamp is used to clamp the open retaining spring 16, forcing it to contract and deform towards the center of the spring groove 14. The outer diameter of the open retaining spring 16 is less than or equal to the inner diameter of the inner cavity of the lock body 1 into which the knob 4 extends. Immediately afterwards, the knob 4 is quickly inserted into the lock body 1. The open retaining spring 16 separates from the special clamp and enters the lock body 1 before it can recover its deformation. The outer wall of the open retaining spring 16... Fitting against the inner wall of lock body 1, remove the special clamps and continue pushing knob 4 into lock body 1. The open snap ring 16 separates from the inner wall of lock body 1 and returns to its elastic deformation. Partially, the open snap ring 16 is located within the limiting groove 15 until the main drive block 8 and drive groove 12 are inserted into place. Knob 4 stops and cannot move further into lock body 1. At this point, the part of extension 7 located within the inner cavity of transmission ring 6, and having the secondary drive block 9 machined therein, passes through drive hole 11 and enters the inner cavity of transmission ring 6. Finally, lock body 1 is fixedly connected to the cabinet door. Position the locking plate 3 on the end of the rotating rod 2. The static friction between the rotating body 5 and the inner wall of the lock body 1 is greater than or much greater than the torsional force required for the transmission ring 6 to rotate relative to the rotating rod 2. To make it easy to know the rotational relationship between the locking plate 3 and the knob 4, the force-bearing end of the knob 4 for hand gripping can be designed as a long strip and perpendicular to the length direction of the locking plate 3. To ensure smooth movement between the secondary drive block 9 and the drive hole 11, the secondary drive block 9 can be made long so that the secondary drive block 9 always remains in the insertion state with the drive hole 11 during the movement. In the initial state, the cabinet door is closed to the cabinet body. There is a gap between the plane of the cabinet body that can be pressed by the locking piece 3 and the plane where the locking piece 3 is located. The length direction of the locking piece 3 is parallel to the vertical plane and offset from the cabinet body. The force-bearing end of the knob 4 is parallel to the horizontal plane. The open snap ring 16 and the limiting groove 15 are adjacent to the groove wall of the transmission ring 6. During the locking process, the knob 4 is rotated relative to the lock body 1. The knob 4 drives the rotating body 5 to rotate synchronously through the main drive block 8. The locking piece 3, the rotating rod 2 and the transmission ring 6 rotate synchronously with the rotating body 5. After the locking piece 3 rotates 90 degrees with the knob 4, the length direction of the locking piece 3 is parallel to the horizontal plane and the locking piece 3 is partially facing the plane of the cabinet body that can be pressed by the locking piece 3. The force-bearing end of the knob 4 is parallel to the vertical plane. Then the knob 4 is turned outward from the lock body 1. Pulling, the open snap ring 16 moves linearly along the width direction of the limiting groove 15 with the knob 4, the secondary drive block 9 moves along the length direction of the drive hole 11 and inserts into the drive hole 11, and the main drive block 8 gradually moves outward from the drive groove 12 until the open snap ring 16 and the limiting groove 15 touch the top of the groove wall away from the transmission ring 6, and the knob 4 can no longer move outward from the lock body 1. At this time, the main drive block 8 separates from the drive groove 12, and the secondary drive block 9 is still in the insertion state with the drive hole 11. Then, the knob 4 is rotated, and the extension body 7 rotates synchronously with the knob 4. The extension body 7 pushes the drive ring 10 through the secondary drive block 9, so that the transmission ring 6 and the extension body 7 rotate synchronously. Since the rotating rod 2 and the rotating body 5 remain synchronously stationary relative to the lock body 1, the transmission ring 6 rotates relative to the rotating rod 2. Since the rotating rod 2 and the transmission ring 6 are connected by a thread, the rotating rod 2 moves linearly along the axis of the rotating ring 6 while the transmission ring 6 rotates. The rotating rod 2 drives the locking piece 3 to gradually move into the inner cavity of the extension body 7. The locking piece 3 gradually approaches the inner wall of the cabinet until the locking piece 3 is in full contact with the inner wall of the cabinet and generates sufficient pressure on the inner wall of the cabinet. The rotating ring 6 can no longer rotate relative to the rotating rod 2 and stops applying torsional force to the knob 4. Then the cabinet door and the cabinet body are locked in place. If the force-bearing end of the knob 4 is not parallel to the vertical plane, the knob 4 can be rotated in the opposite direction to adjust it to the position where the force-bearing end of the knob 4 is parallel to the vertical plane. Push the knob 4 back to the initial position, and the main drive block 8 and the drive groove 12 re-engage. At this time, due to the large static friction between the locking piece 3 and the cabinet body, Knob 4 cannot drive the rotating body 5, rotating rod 2 and locking plate 3 to rotate as a whole. During the unlocking process, pulling knob 4 causes the main drive block 8 to separate from the drive groove 12, and the secondary drive block 9 to be inserted into the drive hole 11. Then, rotating knob 4 in the opposite direction causes the transmission ring 6 to rotate relative to the rotating rod 2. The rotating rod 2 drives the locking plate 3 to gradually move outward from the lock body 1. The locking plate 3 separates from the inner wall of the cabinet. Then, when knob 4 is parallel to the vertical plane again, knob 4 is pushed towards the lock body 1. The main drive block 8 re-engages with the drive groove 12. Then, rotating knob 4 causes the rotating body 5, rotating rod 2, locking plate 3 and transmission ring 6 to rotate as a whole. When knob 4 rotates 90 degrees and the force-bearing end of knob 4 is parallel to the horizontal plane, the locking plate 3 returns to its initial state. At this time, the cabinet door can be opened relative to the cabinet. Compared to existing technologies, this design allows for smooth rotation of the lock plate 3, improving unlocking and locking efficiency. The locking force between the lock plate 3 and the cabinet body is adjustable and the locking is stable, improving the flexibility of opening and closing the cabinet door and cabinet body. The design that the lock plate 3 generates a locking force on the cabinet body only after rotating to the correct position greatly reduces wear on both the lock plate 3 and the inner wall of the cabinet, indirectly improving the structural stability and service life of both the lock plate 3 and the inner wall of the cabinet. The design of having two main drive blocks 8 and two secondary drive blocks 9 that are symmetrical to each other, compared to having only one main drive block 8 and one secondary drive block 9, effectively reduces the rotation angle required for adjusting the knob 4 relative to the lock body 1, which is beneficial for the re-coupling of the main drive block 8 and the drive groove 12 and improves the transmission efficiency between the knob 4 and the rotating body 5, as well as between the extension body 7 and the transmission ring 6.

[0015] As one specific implementation method of the improvement, refer to Figure 2 As shown, to avoid unnecessary movement between the knob 4 and the lock body 1 in the locked state, pin holes 13 are machined on both the lock body 1 and the knob 4 to allow them to communicate with each other and to allow the same pin to be inserted. After the lock plate 3 is tightly fitted to the inner wall of the cabinet, the knob 4 is adjusted to a position where the force-bearing end of the knob 4 is parallel to the vertical plane. The knob 4 is then pushed toward the lock body 1. At this time, the pin holes 13 of the lock body 1 and the knob 4 are in a coaxial position. Then, the pin is simultaneously inserted into the pin holes 13 of both the lock body 1 and the knob 4. Thus, the knob 4 cannot rotate relative to the lock body 1 and cannot move linearly relative to the lock body 1. When the energy storage cabinet is in the locked state, the knob 4 cannot move relative to the lock body 1 even if it is accidentally subjected to external force. This design improves the connection stability of the energy storage cabinet when it is in the locked state.

[0016] As an improved implementation, due to dimensional errors during the production process, there is a situation where the knob 4, transmission ring 6, and rotating body 5 are all in mutual contact when the main drive block 8 is not properly engaged with the drive groove 12, causing the open retaining spring 16 to be unable to be installed into the limiting groove 15. To solve the aforementioned problem, refer to... Figures 2 to 4As shown, the rotating body 5 is divided into an inner cylinder 52 and an outer cylinder 51. The inner diameter of the outer cylinder 51 is matched with the outer diameter of the transmission ring 6. The drive groove 12 is located on the end face of the outer cylinder 51. The outer contour of the inner cylinder 52 is non-circular, and the inner cylinder 52 cannot rotate relative to the outer cylinder 51 after being inserted into it. The inner cylinder 52 can contact the end face of the transmission ring 6. During the process of inserting the knob 4 into the lock body 1, the part of the knob 4 that extends into the outer cylinder 51 contacts the transmission ring 6. The knob 4 pushes the transmission ring 6 to move until it contacts the inner cylinder 52. As knob 4 continues to move, inner cylinder 52 moves linearly relative to outer cylinder 51 until main drive block 8 and drive groove 12 are in place and outer cylinder 51 touches the bottom surface of inner cavity of lock body 1. Then knob 4 stops moving, and open snap ring 16 can smoothly enter limit groove 15. Inner cylinder 52 is stationary relative to outer cylinder 51. This design can adjust the position of transmission ring 6 in outer cylinder 51 by moving inner cylinder 52 relative to outer cylinder 51, while making up for defects caused by dimensional errors and ensuring the accuracy of knob 4 installation position.

[0017] As one specific implementation method of the improvement, refer to Figure 3 and Figure 4 As shown, the two main drive blocks 8 and the two secondary drive blocks 9 are staggered on the circumference centered on the axis of the extension body 7. The main drive blocks 8 and secondary drive blocks 9 are evenly distributed on the outer wall of the extension body 7. This design can improve the overall structural strength of the extension body 7 and its bending resistance under compression.

[0018] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A door lock with smooth rotation and strong locking force, comprising a lock body (1) fixedly connected to a cabinet door, a rotating rod (2) rotatably connected to the lock body (1), a lock plate (3) positioned on one end of the rotating rod (2), and a knob (4) with one end confined within the lock body (1) and capable of linkage with the rotating rod (2), characterized in that: The lock body (1) is provided with a rotating body (5) that is coaxial with the lock body (1) and can rotate relative to the lock body (1), and a transmission ring (6) located in the inner cavity of the rotating body (5) and coaxially connected to the rotating body (5) and machined with internal threads. The rotating rod (2) passes through the rotating body (5) and cannot rotate relative to the rotating body (5). The part of the rotating rod (2) that passes through the inner cavity of the rotating body (5) is threadedly connected to the transmission ring (6). The end of the knob (4) that extends into the lock body (1) is provided with an extension body (7) that can extend into the transmission ring (6). The outer wall of the extension body (7) is provided with a main drive block (8) and a secondary drive block (9) that are respectively adjacent to the two ends of the extension body (7). The inner wall of the transmission ring (6) is provided with a drive ring (10) that matches the outer diameter of the extension body (7). The drive ring (10) is provided with a drive hole (11) through which the secondary drive block (9) passes. The inner diameter of the extension body (7) is larger than the diameter of the rotating rod (2). The end face of the rotating body (5) away from the lock piece (3) is provided with a drive groove (12) for the main drive block (8) to accommodate. The main drive block (8) and the drive groove (12) are engaged to make the knob (4) drive the rotating body (5), the rotating rod (2), the lock piece (3) and the transmission ring (6) to rotate relative to the lock body (1). The secondary drive block (9) is engaged with the drive hole (11) and the main drive block (8) and the drive groove (12) are separated to make the knob (4) drive the transmission ring (6) to rotate relative to the rotating rod (2) and the rotating body (5) to achieve the lock piece (3) to move linearly with the rotating rod (2).

2. The door lock with smooth rotation and strong locking force according to claim 1, characterized in that: Both the lock body (1) and the knob (4) are provided with pin holes (13) for inserting the same pin.

3. A door lock with smooth rotation and high locking force according to claim 1 or 2, characterized in that: The rotating body (5) includes an outer cylinder (51) sleeved outside the transmission ring (6) and an inner cylinder (52) sleeved outside the rotating rod (2) and able to contact one end of the transmission ring (6). The inner cylinder (52) cannot rotate relative to the outer cylinder (51).

4. A door lock with smooth rotation and high locking force according to claim 1 or 2, characterized in that: The rotating rod (2) is a prism with a square end face.

5. A door lock with smooth rotation and high locking force according to claim 1 or 2, characterized in that: The number of the main drive block (8) and the secondary drive block (9) are both two, and they are symmetrically arranged in the plane where the axis of the extension body (7) is located.

6. A door lock with smooth rotation and high locking force according to claim 5, characterized in that: The two main drive blocks (8) and the two secondary drive blocks (9) are offset on a circumference centered on the axis of the extension body (7).

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