Triangular lock for elevator
By improving the mechanical structure design of the elevator triangular lock and using components such as bending parts, limit plates, reset torsion springs and telescopic springs, the problems of complex structure, inconvenience of use and stability of traditional elevator triangular locks have been solved, achieving highly stable and long-life unlocking operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional elevator triangular locks have complex structures, high production costs, are inconvenient to use, are prone to loosening of unlocking parts, fail to limit the function, and are difficult to maintain due to axial movement. Furthermore, they are difficult to reset in the event of a power outage or mechanical failure.
It adopts a mechanical structure design, including components such as a fixed base, lock sleeve, lock rod, return torsion spring, and unlocking bracket. By setting an upward bending part and a limiting plate on the fixed base, combined with the return torsion spring and telescopic spring, the stability and limiting ability of the unlocking bracket are achieved. The stability of the lock rod is improved by wedge blocks and rotating grooves, which prevent dust from entering and enhance the connection between the lock sleeve and the door frame.
It improves the service life and stability of elevator triangular locks, ensures the accuracy and reliability of the unlocking process, prevents the locking rod from getting stuck during rotation, reduces rigid impact, extends component life, and enhances installation stability and structural strength.
Smart Images
Figure CN224076895U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator technology, specifically to an elevator triangular lock. Background Technology
[0002] After the elevator hall door closes, the hall door lock will automatically lock. If personnel outside the hall need to enter the shaft for maintenance, they need to use a triangular key to open the triangular lock device from the outside. The triangular lock device then activates the hall door lock, thereby opening the landing door. However, traditional door lock structures are relatively complex, have some drawbacks, are costly to produce, and are inconvenient to use.
[0003] Chinese utility model patent publication number "CN222478395U" discloses a triangular lock structure, including a lock body, a lock cylinder, a torsion spring, an unlocking component, and a fixing base. One end of the lock body is fixedly connected to the fixing base. The lock body has a cavity inside, through which the lock cylinder passes. The end of the lock cylinder away from the fixing base is fixedly connected to the unlocking component. The torsion spring is sleeved on the outer wall of the lock body. One end of the torsion spring is connected to the fixing base, and the other end of the torsion spring is connected to the unlocking component. The torsion spring is located between the unlocking component and the fixing base.
[0004] However, the aforementioned embankment still has the following drawbacks:
[0005] First, refer to the instruction manual appendix. Figure 1 Included with instruction manual Figure 2 It is known that the unlocking part is a flat plate. The rotation angle of the unlocking part is limited by the linkage between the side wall of the plate and the extension plate of the fixed base. However, during long-term use of the triangular lock, the top nut is prone to loosening, and the relative position of the unlocking part and the column will change. That is, the height of the unlocking part will be higher than the length of the extension plate, and the limiting function will fail.
[0006] Secondly, the column cannot move axially and remains at the same height. When the locking rod and locking groove are closed, the lack of buffer impact on the components can easily lead to component breakage. In addition, in the event of a power outage or mechanical failure, if manual unlocking is required, the triangular lock is stuck circumferentially and cannot move axially, making it difficult to reset and repair.
[0007] Therefore, it is necessary to improve upon the aforementioned shortcomings. Utility Model Content
[0008] The purpose of this utility model is to provide an elevator triangle lock that is easy to use, has low production cost, adopts a mechanical structure design, has a low failure rate, is sturdy and durable, and has a long service life, so as to solve the above-mentioned problems existing in the prior art.
[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an elevator triangular lock, comprising a fixed base, a lock sleeve, a lock rod, a fixing component, a locking component, a reset torsion spring, an unlocking bracket, and a striking rod. The lock rod passes through the lock sleeve. The fixed base has a fixing hole. The fixing component is sleeved on the outer periphery of the lock sleeve through the fixing hole. The reset torsion spring, the unlocking bracket, and the locking component are installed on the lock rod in sequence. The striking rod is linked with the unlocking bracket. The fixed base is bent upward to form a bent portion. The bent portion has a torsion spring end groove. The unlocking bracket has a torsion spring hole. One end of the reset torsion spring is engaged with the torsion spring end groove, and the other end is linked with the torsion spring hole. The unlocking bracket has a limiting plate that is linked with the bent portion.
[0010] By adopting the above technical solution: the triangular lock has an upwardly bent section on the fixed base, with its end parallel to the base plate. A downwardly bent limiting plate is provided at the edge of the unlocking bracket. When unlocking the triangular lock, the end of the bent section abuts against the limiting plate, and the parallel part of the bent section is perpendicular to the limiting plate. This improves the limiting ability of the bent section on the unlocking bracket, effectively preventing excessive rotation of the unlocking bracket during unlocking. Furthermore, a return torsion spring passes through the middle of the lock rod, with both ends engaging with the bent section and the unlocking bracket respectively. This further enhances the anti-rotation capability of the unlocking bracket during unlocking and enables efficient reset of the unlocking bracket, improving its stability.
[0011] The aforementioned elevator triangular lock can be further configured such that: one end of the lock sleeve is open, and the other end face has a through hole for the lock rod to pass through; a wedge-shaped block is provided on the outer circumference of the end of the lock rod located inside the lock sleeve; and a rotating groove is provided on the side of the through hole of the lock sleeve.
[0012] By adopting the above technical solution: one end of the lock sleeve is open, so that the lock rod can pass through the opening and through the through hole to achieve linkage with the lock sleeve. Then, the wedge block is set in the rotating groove, which can limit the lock rod when it rotates, further improving the stability of the triangular lock.
[0013] The aforementioned elevator triangular lock can be further configured as follows: a boss is provided at the end of the lock rod, a closed block is provided in the lock sleeve that is linked with the boss, a linkage hole for the lock rod to pass through is provided in the middle of the closed block, a receiving groove is provided in the middle of the closed block, the boss is provided in the receiving groove, and a telescopic spring is also provided in the lock sleeve, one end of the telescopic spring abuts against the inside of one end of the through hole of the lock sleeve, and the other end abuts against the end face of the closed block.
[0014] By adopting the above technical solution: the boss and the closing block can seal the opening at the end of the lock sleeve, preventing dust and foreign objects from entering the lock sleeve and causing the lock rod to jam, thus improving the stability of the lock rod rotation. In addition, the telescopic springs inside the lock sleeve that abut against the end of the lock sleeve and the closing block provide a basis for the relative sliding of the lock rod and the lock sleeve. The lock rod and the lock sleeve can be unlocked by pressing the lock rod. Furthermore, the telescopic springs of the triangular lock can reduce the rigid impact during elevator operation, prevent the lock rod from rigidly breaking, and improve the stability of the triangular lock.
[0015] The aforementioned elevator triangular lock can be further configured such that a limit groove is provided in the middle of the lock rod, and a limit component is provided in the limit groove.
[0016] By adopting the above technical solution: the limiting component is inserted into the limiting groove, which can prevent excessive displacement of the locking rod, extend the service life of the triangular lock and prevent it from falling out of the lock sleeve. At the same time, the limiting component can engage the reset torsion spring to prevent the torsion spring from shaking.
[0017] The aforementioned elevator triangular lock can be further configured as follows: an anti-rotation keyway is provided at the end of the locking rod away from the boss, an anti-rotation hole is provided on the unlocking bracket that is linked with the anti-rotation keyway, a locking nut is provided as the locking element, and a first external thread is provided on the outer circumferential surface of the locking rod at the end of the anti-rotation keyway that is linked with the locking nut.
[0018] By adopting the above technical solution: the unlocking bracket is detachably connected to the locking rod through the anti-rotation hole, and the anti-rotation keyway cooperates with the straight part of the anti-rotation hole to achieve high stability in the connection between the unlocking bracket and the locking rod. When the triangular lock is unlocked, the unlocking bracket can always maintain linkage with the locking rod, thereby realizing the unlocking of the triangular lock. At the same time, the locking part is a locking nut, which is threadedly connected to the locking rod through the first external thread at the end of the locking rod. The locking part has a higher locking capacity for the unlocking bracket, preventing the unlocking bracket from shaking.
[0019] The aforementioned elevator triangular lock can be further configured as follows: a second external thread is provided on the outer circumference of the lock sleeve, the fixing component is a fixing nut, a fixing washer is provided between the fixing component and the fixing seat, and several rivet holes are opened on the end face of the fixing component along the axial direction.
[0020] By adopting the above technical solution: the fixing part is set as a fixing nut, which, together with the second external thread on the outer circumference of the lock sleeve, achieves an efficient threaded connection. Rotating the fixing part can achieve a stable connection between the lock sleeve and the fixing seat. At the same time, the fixing washer can evenly distribute the force between the fixing part and the fixing seat, preventing excessive local force from causing deformation or damage to the components, thus extending the service life of the triangular lock. In addition, several riveting holes opened along the axial direction on the end face of the fixing part can be used to insert pins or bolts, further enhancing the connection strength between the lock sleeve and the fixing seat, and providing positioning to ensure the stability and safety of the triangular lock in complex environments.
[0021] The aforementioned elevator triangular lock can be further configured as follows: the lock sleeve is linked to the door sleeve, the lock sleeve has a limiting protrusion on the circumferential surface at the opening, the door sleeve has an installation hole, the lock sleeve passes through the installation hole, the outer circumferential surface of the lock sleeve has a fixing keyway, and the fixing seat has a limiting edge in the fixing hole that is linked to the locking keyway.
[0022] By adopting the above technical solution, the matching of the limiting convex ring and the mounting hole can ensure stable and precise installation of the lock sleeve. At the same time, the matching of the fixed keyway and the limiting edge can effectively prevent the lock sleeve from rotating, enhance the firmness of the connection between the lock sleeve and the door frame, improve the installation stability, structural strength and durability of the elevator triangular lock, reduce component wear, extend service life, and maintain the convenience of operation and the compactness of the structure.
[0023] The beneficial effects of this utility model are as follows:
[0024] First, the elevator triangular lock features an upward-bending bend on the fixed base, with the end of the bend parallel to the base plate. A downward-bending limiting plate is also located at the edge of the unlocking bracket. During unlocking, the end of the bend and the limiting plate form a perpendicular contact, effectively limiting the rotation range of the unlocking bracket and preventing excessive rotation. Furthermore, a return torsion spring passes through the middle of the lock rod, with its two ends engaging with the bend and the unlocking bracket respectively. This not only provides the unlocking bracket with return force but also further enhances its stability and limiting capability, ensuring the accuracy and reliability of the unlocking process while extending the service life of the triangular lock.
[0025] Secondly, the locking rod end has a protrusion that cooperates with the sealing block inside the lock sleeve to form a closed structure, effectively preventing dust and foreign objects from entering the lock sleeve and avoiding the locking rod from rotating improperly due to foreign objects getting stuck. At the same time, the lock sleeve contains a telescopic spring, providing a basis for the relative sliding between the locking rod and the lock sleeve, allowing the locking rod to be disengaged by pressing it. Furthermore, the telescopic spring also provides a buffering effect during elevator operation, reducing rigid impact and preventing the locking rod from rigidly breaking due to severe vibration, thus significantly improving the stability and durability of the triangular lock in complex environments.
[0026] Third, an anti-rotation keyway is provided at the end of the locking rod away from the boss, and an anti-rotation hole is provided on the unlocking bracket to match it. Through the cooperation of the straight sections of the anti-rotation keyway and the anti-rotation hole, the unlocking bracket and the locking rod always maintain linkage, ensuring that the unlocking bracket will not rotate relative to the door during unlocking, thus achieving efficient and stable unlocking operation. In addition, a fixing keyway is provided on the outer circumference of the lock sleeve, which cooperates with the limiting edge on the fixing seat to effectively prevent relative rotation between the lock sleeve and the door frame. The limiting protrusion of the lock sleeve cooperates with the mounting hole of the door frame, further ensuring the stability and accuracy of the lock sleeve installation, significantly enhancing the connection between the lock sleeve and the door frame, improving the installation stability, structural strength, and durability of the elevator triangular lock, while reducing component wear, extending the service life of the triangular lock, and ensuring stability and safety in complex environments.
[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of the triangular lock of this utility model;
[0029] Figure 2 This is a disassembled schematic diagram of the triangular lock of this utility model;
[0030] Figure 3 This is a schematic diagram showing the cooperation between the fixing base and the unlocking bracket of this utility model;
[0031] Figure 4 This is a schematic diagram showing the connection of the locking rod, reset torsion spring, and unlocking bracket of this utility model;
[0032] Figure 5 This is a schematic diagram of the locking rod structure of this utility model;
[0033] Figure 6 This is a schematic diagram showing the connection between the locking rod and the telescopic spring sealing block of this utility model;
[0034] Figure 7 This is a schematic diagram of the lock sleeve structure of this utility model;
[0035] Figure 8 This is a structural schematic diagram of the lock sleeve of this utility model from another perspective;
[0036] Figure 9 This is a schematic diagram of the closed block structure of this utility model;
[0037] Label annotations: 1. Fixed base, 11. Fixed hole, 12. Bend, 121. Torsion spring end groove, 13. Limiting edge, 2. Lock sleeve, 21. Opening, 22. Through hole, 23. Rotating groove, 24. Closing block, 241. Linkage hole, 242. Receiving groove, 25. Telescopic spring, 26. Second external thread, 27. Limiting convex ring, 28. Fixed keyway, 3. Locking rod, 31. Wedge block, 32. Limiting groove, 33. Anti-rotation keyway, 34. First external thread, 35. Boss, 36. Fixing member, 41. Fixing washer, 42. Riveting hole, 5. Locking member, 6. Reset torsion spring, 7. Unlocking bracket, 71. Torsion spring hole, 72. Limiting plate, 73. Anti-rotation hole, 8. Striking rod, 9. Door frame, 91. Mounting hole. Detailed Implementation
[0038] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0039] like Figures 1 to 9 The elevator triangular lock shown includes a fixed base 1, a lock sleeve 2, a locking rod 3, a fixing member 4, a locking member 5, a reset torsion spring 6, an unlocking bracket 7, and a striking rod 8. The locking rod 3 passes through the lock sleeve 2. The fixed base 1 has a fixing hole 11. The fixing member 4 is sleeved on the outer periphery of the lock sleeve 2 through the fixing hole 11. The reset torsion spring 6, the unlocking bracket 7, and the locking member 5 are installed on the locking rod 3 in sequence. The striking rod 8 is linked with the unlocking bracket 7. The fixed base 1 is bent upward to form a bent part 12. The bent part 12 has a torsion spring end groove 121. The unlocking bracket 7 has a torsion spring hole 71. One end of the reset torsion spring 6 is engaged with the torsion spring end groove 121, and the other end is linked with the torsion spring hole 71. The unlocking bracket 7 has a limiting plate 72 that is linked with the bent part 12. The triangular lock features an upward-bending bend 12 on the fixed base 1, with its end parallel to the base plate of the fixed base 1. A downward-bending limiting plate 72 is located at the edge of the unlocking bracket 7. When unlocking the triangular lock, the end of the bend 12 abuts against the limiting plate 72, and the parallel portion of the bend 12 is perpendicular to the limiting plate 72. This enhances the limiting ability of the bend 12 on the unlocking bracket 7, effectively preventing excessive rotation of the unlocking bracket 7 during unlocking. Furthermore, a return torsion spring 6 passes through the middle of the lock rod 3, with both ends engaging with the bend 12 and the unlocking bracket 7 respectively. This provides a certain degree of restriction when the triangular lock is unlocked, enabling efficient reset of the unlocking bracket 7 and improving its stability.
[0040] One end of the lock sleeve 2 is open (21), and the other end has a through hole (22) for the lock rod 3 to pass through. A wedge-shaped block (31) is located on the outer circumference of the end of the lock rod 3 inside the lock sleeve 2. A rotating groove (23) is formed around the through hole (22) in the lock sleeve 2. The open end (21) of the lock sleeve 2 allows the lock rod 3 to pass through the opening (21) and through the through hole (22) to achieve linkage with the lock sleeve 2. The wedge-shaped block (31) is located in the rotating groove (23), which limits the movement of the lock rod 3 when it rotates, further improving the stability of the triangular lock.
[0041] The locking rod 3 has a boss 36 at its end. The locking sleeve 2 has a closing block 24 that is linked with the boss 36. The middle of the closing block 24 has a linkage hole 241 for the locking rod 3 to pass through. The middle of the closing block 24 has a receiving groove 242. The boss 36 is located in the receiving groove 242. The locking sleeve 2 also has a telescopic spring 25. One end of the telescopic spring 25 abuts against the inside of one end of the passing hole 22 of the locking sleeve 2, and the other end abuts against the end face of the closing block 24. The boss 36 and the closing block 24 cooperate to close the opening 21 at the end of the lock sleeve 2, preventing dust and foreign objects from entering the lock sleeve 2 and causing the locking rod 3 to get stuck during rotation, thus improving the stability of the locking rod 3's rotation. In addition, the telescopic spring 25 inside the lock sleeve 2, which abuts against the end of the lock sleeve 2 and the closing block 24, provides a basis for the relative sliding of the locking rod 3 and the lock sleeve 2. The locking rod 3 and the lock sleeve 2 can be unlocked by pressing the locking rod 3. Furthermore, the triangular lock can reduce the rigid impact during elevator operation through the telescopic spring 25, preventing the locking rod 3 from rigidly breaking and improving the stability of the triangular lock.
[0042] A limiting groove 32 is provided in the middle of the locking rod 3, and a limiting member 33 is provided in the limiting groove 32. The limiting member 33 passes through the limiting groove 32, which can prevent the locking rod 3 from excessive displacement, extend the service life of the triangular lock and disengage from the lock sleeve 2. At the same time, the limiting member 33 can engage the reset torsion spring 6 to prevent the torsion spring from shaking.
[0043] The locking rod 3 has an anti-rotation keyway 34 at the end away from the boss 36. The unlocking bracket 7 has an anti-rotation hole 73 that is linked to the anti-rotation keyway 34. The locking element 5 is a locking nut. The locking rod 3 has a first external thread 35 on the outer circumferential surface of the anti-rotation keyway 34 that is linked to the locking nut. The unlocking bracket 7 is detachably connected to the locking rod 3 through the anti-rotation hole 73. At the same time, the anti-rotation keyway 34 and the straight part of the anti-rotation hole 73 cooperate to achieve high stability in the connection between the unlocking bracket 7 and the locking rod 3. When the triangular lock is unlocked, the unlocking bracket 7 can always maintain linkage with the locking rod 3, thereby realizing the unlocking of the triangular lock. Meanwhile, the locking element 5 is a locking nut, which is threadedly connected to the locking rod 3 through the first external thread 35 at the end of the locking rod 3. The locking element 5 has a higher locking capacity for the unlocking bracket 7, preventing the unlocking bracket 7 from shaking.
[0044] The outer circumference of the lock sleeve 2 is provided with a second external thread 26. The fixing member 4 is a fixing nut. A fixing washer 41 is provided between the fixing member 4 and the fixing seat 1. Several riveting holes 42 are opened on the end face of the fixing member 4 along the axial direction. The fixing member 4 is set as a fixing nut, which, together with the second external thread 26 on the outer circumference of the lock sleeve 2, achieves an efficient threaded connection. Rotating the fixing member 4 can realize a stable connection between the lock sleeve 2 and the fixing seat 1. At the same time, the fixing washer 41 can evenly distribute the force between the fixing member 4 and the fixing seat 1, preventing excessive local force from causing deformation or damage to the components, thus extending the service life of the triangular lock. In addition, the several riveting holes 42 opened on the end face of the fixing member 4 along the axial direction can be used to insert pins or bolts, further enhancing the connection strength between the lock sleeve 2 and the fixing seat 1, and providing positioning to ensure the stability and safety of the triangular lock in complex environments.
[0045] The lock sleeve 2 is linked to the door sleeve 9. The lock sleeve 2 has a limiting protrusion 27 on its circumferential surface at the opening 21. The door sleeve 9 has an installation hole 91, through which the lock sleeve 2 passes. A fixing keyway 28 is provided on the outer circumferential surface of the lock sleeve 2. The fixing seat 1 has a limiting edge 13 at the fixing hole 11 that is linked to the locking keyway. The limiting protrusion 27 and the installation hole 91 cooperate to ensure stable and precise installation of the lock sleeve 2. Simultaneously, the cooperation between the fixing keyway 28 and the limiting edge 13 effectively prevents the lock sleeve 2 from rotating, enhancing the firmness of the connection between the lock sleeve 2 and the door sleeve 9. This improves the installation stability, structural strength, and durability of the elevator triangular lock, reduces component wear, extends its service life, and maintains operational convenience and structural compactness.
[0046] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. An elevator triangular lock, comprising a fixed base, a lock sleeve, a lock rod, a fixing member, a locking member, a return torsion spring, an unlocking bracket, and a striking rod, wherein the lock rod passes through the lock sleeve, the fixed base has a fixing hole, the fixing member is sleeved on the outer periphery of the lock sleeve through the fixing hole, the return torsion spring, the unlocking bracket, and the locking member are sequentially installed on the lock rod, and the striking rod is linked with the unlocking bracket, characterized in that: The fixed base is bent upward to form a bent portion, the bent portion is provided with a torsion spring end groove, the unlocking bracket is provided with a torsion spring hole, one end of the reset torsion spring is engaged with the torsion spring end groove and the other end is linked with the torsion spring hole, and the unlocking bracket is provided with a limiting plate that is linked with the bent portion.
2. The elevator triangular lock according to claim 1, characterized in that: One end of the lock sleeve is open, and the other end has a through hole for the lock rod to pass through. The lock rod has a wedge-shaped block on the outer circumference of one end inside the lock sleeve, and the lock sleeve has a rotating groove around the through hole.
3. The elevator triangular lock according to claim 2, characterized in that: The locking rod has a boss at its end, and the locking sleeve has a closed block that is linked to the boss. The closed block has a linkage hole in the middle for the locking rod to pass through, and a receiving groove in the middle of the closed block. The boss is located in the receiving groove. The locking sleeve also has a telescopic spring. One end of the telescopic spring abuts against the inside of one end of the passing hole of the locking sleeve, and the other end abuts against the end face of the closed block.
4. The elevator triangular lock according to claim 3, characterized in that: A limiting groove is provided in the middle of the locking rod, and a limiting component is provided in the limiting groove.
5. The elevator triangular lock according to claim 4, characterized in that: The locking rod has an anti-rotation keyway at the end away from the boss, the unlocking bracket has an anti-rotation hole that is linked to the anti-rotation keyway, the locking component is a locking nut, and the locking rod has a first external thread on the outer circumferential surface at the end of the anti-rotation keyway that is linked to the locking nut.
6. The elevator triangular lock according to any one of claims 1 to 5, characterized in that: The outer circumference of the lock sleeve is provided with a second external thread, the fixing member is a fixing nut, a fixing washer is provided between the fixing member and the fixing seat, and a number of riveting holes are opened on the end face of the fixing member along the axial direction.
7. The elevator triangular lock according to claim 6, characterized in that: The lock sleeve is linked to the door sleeve. The lock sleeve has a limiting protrusion on its circumferential surface at the opening. The door sleeve has an installation hole. The lock sleeve passes through the installation hole. The outer circumferential surface of the lock sleeve has a fixing keyway. The fixing seat has a limiting edge in the fixing hole that is linked to the locking keyway.