Auxiliary structure for keeping door handle in horizontal state

Abstract

The utility model discloses an auxiliary structure for keeping a door handle in a horizontal state, and belongs to the technical field of rail transit vehicle equipment. The structure comprises a lock shell, a main lock shaft and an end door handle, a transversely sliding spring bolt and a locking spring are arranged in the lock shell, the extending end of the main lock shaft is sleeved with a main lock gear, a main lock pull rod capable of sliding up and down penetrates through the lock shell, and a side wall meshing rack of the main lock pull rod is meshed with the main lock gear. A guide rod penetrates through the upper end and the lower end of the lock shell, a pull rod check block with an embedding protrusion is fixed to the rod end and matched with the main lock pull rod embedding groove, and the guide rod is sleeved with a compression spring to achieve bidirectional elastic reset. The structure effectively maintains the initial state of internal parts of the door lock, improves the action reliability, reduces the maintenance cost, and is particularly suitable for a rail transit vehicle door lock system with strict air tightness requirements.

Description

Technical Field

[0001] This utility model belongs to the technical field of rail transit vehicle equipment, and specifically refers to an auxiliary structure for keeping a door handle in a horizontal state. Background Technology

[0002] With the rapid development of China's rail transit equipment industry, a large number of vehicles are manufactured and used. Vehicles with strict airtightness requirements are equipped with auxiliary locks. For airtight hinged doors, the main lock is typically a strike lock. After the strike lock is engaged, the auxiliary lock needs to be engaged and disengaged via the main lock handle. It is essential that the main lock handle maintains its initial horizontal position after engagement. Since the main lock handle is linked to internal components via a pivot, the handle's position must be consistent with the internal components. Failure to maintain the initial position would affect the reliability and stability of the internal components. Utility Model Content

[0003] The purpose of this utility model is to provide an auxiliary structure for keeping the door handle in a horizontal state, which can effectively keep the main lock handle in a horizontal state, so that the various parts inside the door lock are kept in a good initial state, and the subsequent operation is more reliable and stable.

[0004] The purpose of this utility model is achieved as follows:

[0005] An auxiliary structure for keeping a door handle horizontal includes a lock housing and a main lock shaft rotatably connected to the middle of the lock housing. A latch with a locking spring at one end slides laterally in the middle of the lock housing. Rotating the main lock shaft drives the latch to slide laterally outward of the lock housing against the spring force of the locking spring. A door handle is provided at the end of the main lock shaft. A main lock gear that rotates coaxially is fitted on the part of the main lock shaft that extends into the lock housing. A main lock rod that slides up and down and passes through the lock housing is provided on the lock housing. A meshing rack is provided on the side wall of the main lock rod, and the meshing rack meshes with the main lock gear. Guide rods are provided at both the upper and lower ends of the lock housing. A pull rod stop block that engages with the side wall of the main lock rod is fixed at the end of the guide rod that extends into the lock housing. A compression spring is fitted on the part of the guide rod that extends into the lock housing. One end of the compression spring abuts against the inner wall of the lock housing, and the other end abuts against the side wall of the pull rod stop block.

[0006] The present invention is further configured such that a partition sleeve is fitted onto the part of the guide rod extending out of the lock housing, and a locking nut assembly is screwed onto the end of the guide rod extending out of the lock housing, with the bottom of the locking nut assembly abutting against the top of the partition sleeve.

[0007] The present invention is further configured such that a fitting groove is provided on the side wall of the main lock rod facing the guide rod, and a fitting protrusion adapted to the fitting groove is formed on the side wall of the pull rod stop, and the fitting protrusion and the pull rod stop are integral structures.

[0008] The present invention is further configured such that the main locking gear is a gear disc sleeved on the main locking shaft, and a plurality of meshing teeth are evenly distributed along the arc direction on the outer wall of the gear disc.

[0009] The present invention is further configured such that the main locking rod and the meshing rack are integrally formed.

[0010] The present invention is further configured such that the main locking shaft has a rectangular cross-section, and the main locking gear is provided with a rectangular mounting hole that mates with it.

[0011] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0012] 1. The auxiliary structure provided by this utility model utilizes guide rods with compression springs connected to the upper and lower ends of the lock housing. The elastic force of the compression springs keeps the main lock lever in its initial state in the middle, thereby keeping the door handle at the end of the main lock shaft horizontal. The overall structure is simple, easy to use and maintain, and always maintains its initial state after the door handle is used, effectively reducing the workload and cost of maintenance work throughout the life cycle of the locking structure.

[0013] 2. This utility model further provides a partition sleeve in the part of the guide rod that extends out of the lock housing, and adjusts the length of the extended part of the guide rod by means of a locking nut assembly, so as to keep the main lock rod in the middle position.

[0014] 3. The present invention further provides an engagement groove on one side of the main lock rod for engagement with the rod stop, which enables the guide rod end to act on the main lock rod, thereby driving the main lock rod to move up and down by the guide rod, making it less likely for the connection to slip or fall off.

[0015] 4. The main locking gear provided by this utility model is provided with meshing teeth evenly distributed along the arc direction, which can keep the main locking gear within a suitable rotation range. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of the main locking rod and guide rod of this utility model;

[0018] Figure 3 This is a schematic diagram of the main locking gear of this utility model;

[0019] Figure label:

[0020] 1-Lock case;

[0021] 2-Main lock shaft; 20-Door handle

[0022] 3-Lock tongue; 30-Locking spring;

[0023] 4-Main locking gear; 40-Gear disc; 41-Meshing teeth; 42-Rectangular mounting hole;

[0024] 5-Main lock lever; 50-Engaging rack; 51-Engaging groove;

[0025] 6-Guide rod; 60-Pull rod stop; 61-Compression spring; 62-Embedded protrusion;

[0026] 7-Partition sleeve; 70-Locking nut assembly. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1 — Figure 3 :

[0028] An auxiliary structure for keeping a door handle horizontal includes a lock housing 1 and a main lock shaft 2 rotatably connected to the middle of the lock housing 1. A latch 3 with its end abutting a locking spring 30 slides laterally across the middle of the lock housing 1. Rotating the main lock shaft 2 drives the latch 3 to slide laterally outward from the lock housing 1, overcoming the elastic force of the locking spring 30. A door handle 20 is provided at the end of the main lock shaft 2. A main lock gear 4, coaxially rotating, is fitted onto the portion of the main lock shaft 2 that extends into the lock housing 1. A sliding lock shaft 4 passes through the lock housing 1. The main lock lever 5 of the housing 1 has a meshing rack 50 on its side wall, which meshes with the main lock gear 4. Guide rods 6 are provided at both the upper and lower ends of the lock housing 1. The end of the guide rod 6 that extends into the lock housing 1 is fixed with a lever stop 60 that engages with the side wall of the main lock lever 5. A compression spring 61 is sleeved on the part of the guide rod 6 that extends into the lock housing. One end of the compression spring 61 abuts against the inner wall of the lock housing 1, and the other end abuts against the side wall of the lever stop 60.

[0029] During implementation, the main locking shaft 2 is inserted into the lock housing, and the latch 3, driven by the locking spring 30, is normally installed inside the lock housing 1. The locking spring 30 drives the latch 3 to extend outward from the lock housing 1. A swinging member is fixed on the main locking shaft 2, and the swinging member swings with the rotation of the main locking shaft 2. An abutment part is formed at the end of the latch that is inserted into the lock housing 1. During the swinging process, the swinging member swings the abutment part, which can overcome the elastic force of the locking spring 30 and allow the latch to extend into the lock housing 1 from the outside.

[0030] However, the spring force of the locking spring 30 alone cannot keep the main locking shaft 2 in its initial state. Therefore, a meshing rack 50 that can be adapted to the main locking gear 4 on the main locking shaft is provided, and the main locking rod is kept in the middle position by compression springs at both ends. The principle of keeping it in the middle position is as follows:

[0031] When the main locking shaft 2 is rotated, the main locking gear 4 is driven to rotate, which in turn drives the meshing rack to move up and down. Whether it moves down or up, it will stretch the compression spring on one side and squeeze the compression spring on the other side. During the deformation process, the springs on both sides are prone to generating opposite forces, so that the main locking lever 5 maintains its initial state.

[0032] This auxiliary structure is simple in design, easy to maintain and use, and makes subsequent work more reliable and stable.

[0033] Preferably, the guide rod 6 is fitted with a partition sleeve 7 on the part extending out of the lock housing 1, and a locking nut assembly 70 is screwed to the end of the guide rod 6 extending out of the lock housing 1, with the bottom of the locking nut assembly 70 abutting against the top of the partition sleeve 7.

[0034] In the above implementation process, by adjusting the thread pitch or overall height of the locking nut assembly 70, the length of the extended guide rod 6 can be adjusted, and fine adjustments can be made up and down to ensure that the main locking rod is in the middle position. At the same time, the elasticity of the compression spring can be adjusted to achieve the speed of adjustment to return to the initial state.

[0035] Preferably, the main locking lever 5 has an engagement groove 51 on the side wall facing the guide rod 6, and the side wall of the lever stop 60 has an engagement protrusion 62 that matches the engagement groove 51, and the engagement protrusion 62 and the lever stop 60 are an integral structure.

[0036] In the above structure, the main locking rod and the guide rod 6 are detachable. They are fitted together by the insertion protrusion 62 into the insertion groove 51, so that the guide rod 6 can be linked with the main locking rod 5.

[0037] It is worth mentioning that the interlocking protrusion 62 is part of the side wall of the pull rod stop 60, and it is the same part as the pull rod stop 60. When the interlocking protrusion 62 is fitted into the fitting groove 51, it is welded to the main lock pull rod 5 to form an integral structure, thereby improving the overall structural strength.

[0038] Preferably, the main locking gear 4 is a gear disk 40 sleeved on the main locking shaft 2, and a plurality of meshing teeth 41 are evenly distributed along the arc direction on the outer wall of the gear disk 40.

[0039] During the above implementation process, the meshing teeth 41 allow the meshing rack 50 to move within a certain range, preventing the main locking shaft 2 from rotating too much and keeping the compression springs 61 at both ends within their normal operating range.

[0040] Preferably, the main locking rod 5 and the meshing rack 50 are integrally formed. This ensures sufficient structural strength while providing some convenience for installation.

[0041] Preferably, the main locking shaft 2 has a rectangular cross-section, and the main locking gear 4 is provided with a rectangular mounting hole 42 that mates with it.

[0042] In the above structure, the main locking shaft 2 can be tightly fitted to the main locking gear 4 during rotation, effectively driving it and preventing stripping.

[0043] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An auxiliary structure for keeping a door handle in a horizontal state, comprising a lock housing (1) and a main lock shaft (2) rotatably connected to the middle of the lock housing (1), wherein a latch (3) with its end abutting a locking spring (30) is laterally slidable in the middle of the lock housing (1), and the main lock shaft (2) is rotated to drive the latch (3) to slide laterally outward of the lock housing (1) against the elastic force of the locking spring (30), and a door handle (20) is provided at the end of the main lock shaft (2), characterized in that, The main lock shaft (2) is fitted with a main lock gear (4) that rotates coaxially into the lock housing (1). A main lock pull rod (5) that slides up and down and passes through the lock housing (1) is provided on the lock housing (1). A meshing rack (50) is provided on the side wall of the main lock pull rod (5), and the meshing rack (50) meshes with the main lock gear (4). Guide rods (6) are provided at both the upper and lower ends of the lock housing (1). A pull rod stop (60) that engages with the side wall of the main lock pull rod (5) is fixed at the end of the guide rod (6) that extends into the lock housing (1). A compression spring (61) is fitted on the part of the guide rod (6) that extends into the lock housing. One end of the compression spring (61) abuts against the inner wall of the lock housing (1), and the other end abuts against the side wall of the pull rod stop (60).

2. The auxiliary structure for keeping a door handle in a horizontal state according to claim 1, characterized in that, The guide rod (6) extends out of the lock housing (1) and is fitted with a partition sleeve (7). The end of the guide rod (6) extending out of the lock housing (1) is screwed with a locking nut assembly (70). The bottom of the locking nut assembly (70) abuts against the top of the partition sleeve (7).

3. An auxiliary structure for keeping a door handle in a horizontal state according to claim 1 or 2, characterized in that, The main locking rod (5) has a groove (51) on its side wall facing the guide rod (6), and the side wall of the rod stop (60) has a groove (62) that matches the groove (51), and the groove (62) and the rod stop (60) are an integral structure.

4. An auxiliary structure for keeping a door handle in a horizontal state according to claim 1 or 2, characterized in that, The main locking gear (4) is a gear disc (40) sleeved on the main locking shaft (2), and a number of meshing teeth (41) are evenly distributed along the arc direction on the outer wall of the gear disc (40).

5. The auxiliary structure for keeping a door handle in a horizontal state according to claim 1, characterized in that, The main locking rod (5) and the meshing rack (50) are integrally formed.

6. The auxiliary structure for keeping a door handle in a horizontal state according to claim 1, characterized in that, The main locking shaft (2) has a rectangular cross section, and the main locking gear (4) is provided with a rectangular mounting hole (42) that mates with it.

Images