Door lock for inner end door of high-speed passenger train

Abstract

The utility model relates to the technical field of locks, in particular to a door lock for an inner end door of a high-speed passenger train. Comprising a lock body, a lock cylinder is arranged on the lock body, and a pin shaft is arranged on the lock cylinder; a through groove for containing the lock column is formed in the lock body, a pin groove matched with the pin shaft is formed in one end of the lock column, and the other end of the lock column extends out of the lock body. Two positioning grooves perpendicular to the lock column are further formed in the lock body, ball screws facing the lock column are arranged in the two positioning grooves, two limiting concave rings matched with the ball screws are arranged on the lock column, and the two limiting concave rings are located at the positions where the lock column is matched with the ball screws when the door lock is in the opened state and the closed state respectively and used for fixing the lock column. According to the door lock for the inner end door of the high-speed passenger train, matching of materials is achieved, and the movement direction of the lock column is adjusted by limiting the degree of freedom; the surface contact between the lock column and the lock body is changed into point contact, the fit clearance between the lock column and the lock body is as small as possible, the extension and retraction of the spring bolt are flexible and free, and the phenomena of clamping stagnation and shaking are avoided.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a door lock for the inner end door of a high-speed railway passenger car. Background Technology

[0002] When a high-speed railway passenger car's inner door lock is in operation, the gap between the locking pin and the lock body causes abnormal noise. Furthermore, when the door is closed, the locking pin pushes up the isolation lock tongue, posing a risk of electrical signal transmission malfunction. Over time, this significantly reduces the door's lifespan. Existing inner door locks typically use a nylon plate embedded between the locking pin and the lock body for fixation, relying on the fit between holes and shafts to reduce wobbling, which has limitations. This invention provides a high-speed railway passenger car inner door lock that achieves the locking function without abnormal noise during operation. Utility Model Content

[0003] The purpose of this utility model is to provide a door lock for the inner end door of a high-speed railway passenger car to solve the problems mentioned in the background art.

[0004] A lock for the inner end door of a high-speed railway passenger car, characterized in that: it includes a lock body, a lock cylinder on the lock body, and a pin on the lock cylinder; the lock body has a through groove for placing a lock pin, one end of the lock pin has a pin groove that mates with the pin, and the other end extends out of the lock body; the lock body also has two positioning grooves perpendicular to the lock pin, each of the two positioning grooves having a ball screw facing the lock pin, and the lock pin has two concave rings that mate with the ball screws, respectively located at the positions where the lock pin mates with the ball screws in the open and closed states of the door lock, for fixing the lock pin.

[0005] Furthermore, a first transition plate and a second transition plate are respectively provided on both sides of the lock body. The first transition plate and the second transition plate are fixed by screws passing through the lock body, thus protecting the lock body between the two transition plates.

[0006] Furthermore, outer veneers are also bonded to both sides of the first and second transition plates.

[0007] Furthermore, the lock body also includes an inner lock sleeve and an outer lock sleeve for fixing the lock cylinder.

[0008] Furthermore, the outer lock sleeve surface is provided with inner and outer markings.

[0009] Furthermore, the locking pin, locking cylinder, pin shaft, inner locking sleeve, outer locking sleeve, and screws are stainless steel components; the first transition plate, second transition plate, and outer cladding are aluminum alloy components.

[0010] Compared with the prior art, this utility model provides a door lock for the inner end door of a high-speed railway passenger car, which has the following beneficial effects:

[0011] The door lock provided by this utility model limits the locking pin 1 by adding slotted ball screws at both ends of the lock body. By adjusting the amount of insertion of the ball screw 12 into the lock body 1, the stability of the locking pin 3 is ensured. This limiting method restricts the degree of freedom of the locking pin 3, so that the locking pin 3 only performs linear reciprocating movements up and down. It changes the previous surface contact to point contact, avoiding the security risks caused by the gap between the shaft and the hole. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is another perspective view of the present invention;

[0015] Figure 3 This is a front view of the present utility model;

[0016] Figure 4 for Figure 3 Reverse view;

[0017] Figure 5 This is an internal sectional view of the present invention;

[0018] Figure 6 for Figure 5 Internal sectional view of opposite faces;

[0019] Figure 7 This is a diagram showing the door lock in the closed state.

[0020] Figure 8 This is a diagram showing the door lock in the open position.

[0021] Figure 9 This is a 3D structural diagram of the present invention;

[0022] In the diagram, 1-lock body, 2-inner lock sleeve, 3-lock pin, 4-lock cylinder, 5-pin, 6-first transition plate, 7-second transition plate, 8-outer surface, 9-inner marking, 10-outer marking, 11-screw, 12-ball screw, 13-outer lock sleeve. 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0025] When a train is traveling, the interior doors of modern high-speed railway passenger compartments will tilt at a certain angle relative to the direction of travel due to the slope of the road surface and the local deformation of the tread. This will cause the door to tilt in different directions. Traditional interior door locks will cause abnormal noises or door shaking due to the gap between the bolt and the lock body. Over time, the service life of the door will be greatly reduced. In order to reduce the abnormalities caused by the door lock, a door lock for installing interior doors has been specially designed.

[0026] To address the aforementioned problems, this embodiment proposes a door lock for the inner end door of a high-speed railway passenger car, such as... Figure 1-9 As shown, the lock body includes a lock body 1. A first transition plate 6 and a second transition plate 7 are provided on both sides of the lock body 1. The two transition plates are fixed by screws 11 passing through the lock body 1. An outer surface 8 is bonded to the outer side of both the first transition plate 6 and the second transition plate 7. The outer surface 8 and the two transition plates together clamp the lock body 1 in the middle, which plays a role in external impact resistance and improves the stability of the internal structure of the lock body 1.

[0027] The lock body 1 contains a lock cylinder 4, which is fixed within the lock body 1 by an inner lock sleeve 2 and an outer lock sleeve 13. A pin 5 is mounted on the lock cylinder 4, allowing it to rotate. The lock body 1 also contains a through groove for a locking pin 3. One end of the locking pin 3 has a groove that mates with the pin 5, and the other end extends out of the lock body 1. When the lock cylinder 4 rotates, the pin 5 is positioned within the groove on the locking pin 3. Its movement can be decomposed into reciprocating motion along the groove and reciprocating motion along the pin 5. Therefore, rotating the lock cylinder 4 causes the pin 5 to reciprocate within the through groove.

[0028] To prevent the pin 5 from colliding with the lock body 1 due to gaps, this embodiment provides two positioning grooves perpendicular to the lock pin 3 inside the lock body 1. Each positioning groove contains a ball screw 12 facing the lock pin 3. The lock pin 3 has two limiting recesses that mate with the ball screws 12. These two limiting recesses are located at the positions where the lock pin 3 mates with the ball screws 12 in the open and closed states, respectively, to secure the lock pin 3. When the lock cylinder 4 rotates to the closed position, the ball screws 12 engage. Figure 5 Alternatively, in the lower limiting recess of lock cylinder 6, the compression on both sides fixes lock cylinder 3, preventing it from sliding in the through groove direction and also preventing lock cylinder 3 from impacting the lock bodies 1 on both sides. Similarly, when lock cylinder 4 is rotated to the open position, ball screw 12 engages as if... Figure 5 Alternatively, it can be placed in the upper limiting recessed ring, which serves the same fixing function.

[0029] As an improvement to the above embodiments, the outer lock sleeve 13 of this utility model is provided with an inner mark 9 and an outer mark 10 on its surface, which serve as a prompt.

[0030] As an improvement to the above embodiments, the locking pin 3, locking cylinder 4, pin 5, inner locking sleeve 2, outer locking sleeve 13, and screw 11 of this utility model are stainless steel components; the first transition plate 6, the second transition plate 7, and the outer cladding 8 are aluminum alloy components.

[0031] This utility model provides a door lock for the inner end door of a high-speed railway passenger car. It achieves material matching and adjusts the movement direction of the lock cylinder by restricting the degree of freedom. It changes the surface contact between the lock cylinder and the lock body to point contact, ensuring that the fit gap between the lock cylinder and the lock body is as small as possible, and that the extension and retraction of the lock tongue are flexible and free, without jamming or shaking.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

Claims

1. A high speed railway passenger car inner door lock characterized in that: The application relates to a lock body (1) which is provided with a lock cylinder (4) and a pin shaft (5), a through slot for placing a lock column (3) is arranged in the lock body (1), the lock column (3) is provided with a pin groove at one end and extends out of the lock body (1) at the other end, two positioning grooves which are perpendicular to the lock column (3) are arranged in the lock body (1), a wave bead screw (12) is arranged in each of the two positioning grooves and faces the lock column (3), the lock column (3) is provided with two limiting concave rings which are matched with the wave bead screws (12) and are respectively located at the positions where the lock column (3) is matched with the wave bead screws (12) in the open and closed states of the door lock, and the two limiting concave rings are used for fixing the lock column (3).

2. A high speed railway passenger car inner door lock according to claim 1, characterized in that: First and second transition plates (6 and 7) are respectively arranged at the two sides of the lock body (1), the first and second transition plates (6 and 7) are fixed by a screw (11) penetrating through the lock body (1) and protect the lock body (1) between the two transition plates.

3. A high speed railway passenger car inner door lock according to claim 2, characterized in that: The first and second transition plates (6 and 7) are further attached with outer pasting surfaces (8) at the two sides.

4. A high speed railway passenger car inner door lock according to claim 3, characterized in that: The lock body (1) further comprises an inner lock sleeve (2) and an outer lock sleeve (13) which are used for fixing the lock cylinder (4).

5. A high speed railway passenger car inner door lock according to claim 4, characterized in that: The outer lock sleeve (13) is provided with an inner mark (9) and an outer mark (10) on the surface.

6. A high speed railway passenger car inner door lock according to claim 4, characterized in that: The lock column (3), the lock cylinder (4), the pin shaft (5), the inner lock sleeve (2), the outer lock sleeve (13) and the screw (11) are stainless steel components; the first and second transition plates (6 and 7) and the outer pasting surfaces (8) are aluminum alloy components.

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