An auxiliary coupling device for tightlock couplings
By introducing a laser rangefinder and locking mechanism into the coupler assembly, the problem of difficult alignment during coupler docking has been solved, enabling automatic docking and unlocking, thus improving the convenience of coupler connection and the stability of train operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JILIN COMM POLYTECHNIC
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional coupler systems lack auxiliary devices during docking, making it difficult to align the front and rear couplers, which affects connection quality and operational stability.
A close-fitting coupler auxiliary coupling device was designed, which includes a laser rangefinder and a locking mechanism. The device achieves automatic docking and unlocking of the front and rear couplers through components such as a plug rod, a fixing cylinder, and a locking plate. Combined with the drive cylinder and drive spring, it ensures position alignment and stable connection.
It achieves precise docking and automatic locking of the front and rear couplers, improving the convenience of coupler connection and operational stability, reducing positional deviation, and enhancing the smoothness and sealing of train operation.
Smart Images

Figure CN224447778U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of coupler connection auxiliary devices, specifically a close-fitting coupler auxiliary coupling device. Background Technology
[0002] Close-fit couplers are a type of coupler widely used in modern rail transit. Their core feature is that they achieve a tight connection through mechanical structure, which greatly reduces longitudinal clearance during train operation and improves running stability and sealing.
[0003] Traditional coupler systems require the positions of the front and rear couplers to be observed during docking. However, there is a lack of auxiliary devices during the docking process. Such auxiliary devices can better restrict the positions of the front and rear couplers, thereby aligning them better, avoiding deviations in their positions, and ensuring a smoother docking. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a close-fitting coupler auxiliary coupling device, which has the advantages of assisting coupler docking and being easy to use, thus solving the problems mentioned in the background art.
[0005] This utility model provides the following technical solution: a close-fitting coupler auxiliary coupling device, including a front coupler, a rear coupler installed on the outer wall of the front coupler, a control plate fixedly mounted on the outer wall of the front coupler, a laser rangefinder fixedly mounted on the outer wall of the rear coupler, a fixed cylinder fixedly mounted on the outer wall of the rear coupler, an insert rod fixedly mounted on the outer wall of the front coupler, a locking box fixedly mounted on the outer wall of the fixed cylinder, a locking plate movably sleeved in the inner cavity of the locking box, a pull rod fixedly mounted on the outer wall of the locking plate, a drive spring movably sleeved on the outer wall of the pull rod, a limit rod fixedly mounted on the outer wall of the fixed cylinder, a drive cylinder fixedly mounted on the outer wall of the fixed cylinder, a limit post fixedly mounted on the outer wall of the locking plate, and a sliding groove formed on the outer wall of the locking box.
[0006] As a preferred technical solution of this utility model: the outer wall shape of the insertion rod matches the outer wall shape of the fixing cylinder, and the outer wall shape of the locking plate matches the inner wall shape of the locking groove.
[0007] As a preferred technical solution of this utility model: the two ends of the outer wall of the drive spring are in contact with the inner wall of the locking box and the outer wall of the locking plate, respectively, and the drive spring is made of high carbon steel.
[0008] As a preferred technical solution of this utility model: the output shaft of the driving cylinder contacts the outer wall of the pull rod, and the pull rod is movably sleeved on the outer wall of the limiting rod.
[0009] As a preferred technical solution of this utility model: the limiting post passes through the inner cavity of the sliding groove, the pull rod passes through the outer wall of the locking box and is connected to the locking plate, and the installation position of the measuring and control plate corresponds to the installation position of the laser rangefinder.
[0010] As a preferred technical solution of this utility model: there are two fixing cylinders, and the two fixing cylinders are respectively installed on both sides of the outer wall of the rear coupler.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] 1. This close-fitting coupler auxiliary coupling device, through the insertion rod set on the outer wall of the front coupler, allows the insertion rod to enter the inner cavity of the fixed cylinder when the front coupler and the rear coupler are docked, until the locking plate enters the locking groove, thereby locking the insertion rod. Under the action of the insertion rod and the fixed cylinder, it plays an auxiliary connection role in docking the front coupler and the rear coupler. During docking, it can automatically lock the insertion rod. When unlocking, the pull rod is pulled by the drive cylinder, causing the locking plate to leave the inner cavity of the locking groove, thereby unlocking the insertion rod.
[0013] 2. This close-coupler auxiliary coupling device uses a control plate installed on the outer wall of the front coupler and a laser rangefinder installed on the outer wall of the rear coupler. The laser rangefinder can measure the distance between the front and rear couplers. Once the distance between the front and rear couplers changes, it can be detected in time, thereby better realizing the measurement of the position of the front and rear couplers. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a schematic diagram of the front coupler structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the fixed cylinder structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the locking box structure of this utility model;
[0018] Figure 5 This is a schematic diagram of the locking plate structure of this utility model.
[0019] In the diagram: 1. Front coupler; 2. Rear coupler; 3. Control board; 4. Laser rangefinder; 5. Fixing cylinder; 6. Insert rod; 7. Locking box; 8. Locking plate; 9. Locking groove; 10. Pull rod; 11. Drive spring; 12. Limit rod; 13. Drive cylinder; 14. Sliding groove; 15. Limit post. Detailed Implementation
[0020] 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.
[0021] Please see Figure 1 - Figure 5 A close-fitting coupler auxiliary coupling device includes a front coupler 1, a rear coupler 2 installed on the outer wall of the front coupler 1, a control plate 3 fixedly mounted on the outer wall of the front coupler 1, a laser rangefinder 4 fixedly mounted on the outer wall of the rear coupler 2, a fixed cylinder 5 fixedly mounted on the outer wall of the rear coupler 2, an insert rod 6 fixedly mounted on the outer wall of the front coupler 1, a locking box 7 fixedly mounted on the outer wall of the fixed cylinder 5, a locking plate 8 movably sleeved in the inner cavity of the locking box 7, a pull rod 10 fixedly mounted on the outer wall of the locking plate 8, a drive spring 11 movably sleeved on the outer wall of the pull rod 10, a limit rod 12 fixedly mounted on the outer wall of the fixed cylinder 5, a drive cylinder 13 fixedly mounted on the outer wall of the fixed cylinder 5, a limit post 15 fixedly mounted on the outer wall of the locking plate 8, and a sliding groove 14 opened on the outer wall of the locking box 7.
[0022] In the above structure, by using the insert rod 6 provided on the outer wall of the front coupler 1 and the fixing cylinder 5 provided on the outer wall of the rear coupler 2, when the front coupler 1 and the rear coupler 2 are connected, the insert rod 6 enters the inner cavity of the fixing cylinder 5. When the fixing cylinder 5 and the insert rod 6 are connected, the locking plate 8 can enter the inner cavity of the locking groove 9, thereby locking the insert rod 6 under the action of the locking plate 8.
[0023] In a preferred embodiment: the outer wall shape of the insertion rod 6 matches the outer wall shape of the fixing cylinder 5, and the outer wall shape of the locking plate 8 matches the inner wall shape of the locking groove 9;
[0024] In the above structure, by setting the fixing cylinder 5 and the insert rod 6 on the outer wall of the front coupler 1 and the rear coupler 2, when the insert rod 6 enters the inner cavity of the fixing cylinder 5, the locking plate 8 will retract into the inner cavity of the locking box 7 under the action of the outer wall of the insert rod 6, so that the insert rod 6 enters the inner cavity of the fixing cylinder 5 until the locking plate 8 enters the inner cavity of the locking groove 9, thereby locking the insert rod 6 under the action of the locking plate 8.
[0025] In a preferred embodiment: the two ends of the outer wall of the drive spring 11 are in contact with the inner wall of the locking box 7 and the outer wall of the locking plate 8, respectively, and the drive spring 11 is made of high carbon steel;
[0026] In the above structure, the drive spring 11 provided on the outer wall of the pull rod 10 can drive the locking plate 8 under the action of the drive spring 11, so that when locking the insertion rod 6, the locking plate 8 can be driven better under the action of the drive spring 11, so that the locking plate 8 enters the inner cavity of the insertion rod 6 and better locks the insertion rod 6.
[0027] In a preferred embodiment: the output shaft of the drive cylinder 13 contacts the outer wall of the pull rod 10, and the pull rod 10 is movably sleeved on the outer wall of the limit rod 12;
[0028] In the above structure, the drive cylinder 13 installed on the outer wall of the fixed cylinder 5 can drive the pull rod 10 under the action of the drive cylinder 13, thereby causing the pull rod 10 to move the locking plate 8 and pull the locking plate 8 out of the inner cavity of the locking groove 9, thereby unlocking the insertion rod 6 and separating the front hook 1 from the rear hook 2.
[0029] In a preferred embodiment: the limiting post 15 passes through the inner cavity of the sliding groove 14, the pull rod 10 passes through the outer wall of the locking box 7 and is connected to the locking plate 8, and the installation position of the measuring and control plate 3 corresponds to the installation position of the laser rangefinder 4.
[0030] In the above structure, the sliding groove 14 opened on the outer wall of the locking box 7 and the limiting post 15 set on the outer wall of the locking plate 8 can restrict the locking plate 8 under the action of the limiting post 15, so that the locking plate 8 can be better driven under the action of the driving spring 11 and the driving cylinder 13, so that the locking plate 8 enters the inner cavity of the insertion rod 6 to lock and unlock the insertion rod 6.
[0031] In a preferred embodiment, there are two fixing cylinders 5, and the two fixing cylinders 5 are respectively installed on both sides of the outer wall of the rear hook 2;
[0032] In the above structure, by setting the fixing cylinders 5 on both sides of the outer wall of the rear hook 2, when the front hook 1 and the rear hook 2 are connected, the insertion rod 6 is connected to the fixing cylinder 5. As the front hook 1 and the rear hook 2 move, the insertion rod 6 can move along the inner wall of the fixing cylinder 5 until the locking plate 8 enters the inner cavity of the locking groove 9. At this time, the locking plate 8 can lock the insertion rod 6.
[0033] Working Principle: During use, when the front hook 1 and rear hook 2 need to be connected, the insertion rod 6 moves along the inner wall of the fixed cylinder 5 until the locking plate 8 enters the inner cavity of the locking groove 9. During the movement of the insertion rod 6, the locking plate 8 is moved into the inner cavity of the locking box 7. During this process, the drive spring 11 is compressed. When the insertion rod 6 is fully inside the inner cavity of the fixed cylinder 5, the locking plate 8 enters the inner cavity of the locking groove 9. At this point, the fixed cylinder 5 and the insertion rod 6 are locked under the action of the locking plate 8 and the locking groove 9, thus assisting in the connection of the front hook 1 and the rear hook 2. When it is necessary to unlock the front hook 1 and the rear hook 2, the pull rod 10 is driven by the drive cylinder 13, causing the pull rod... 10 moves outward from the inner cavity of the locking box 7 until the locking plate 8 is completely removed from the inner cavity of the locking groove 9, thereby unlocking the plug rod 6. At this time, the front hook 1 and the rear hook 2 can be easily separated. When the front hook 1 and the rear hook 2 are docked, the position of the control board 3 can be measured under the action of the laser rangefinder 4. During the use of the front hook 1, a laser can be emitted to the control board 3 under the action of the laser rangefinder 4 to determine the distance between the control board 3 and the laser rangefinder 4, thereby measuring the distance between the front hook 1 and the rear hook 2. When the front hook 1 and the rear hook 2 are docked, if the distance between the control board 3 and the laser rangefinder 4 changes, it can be detected in time under the action of the laser rangefinder 4.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A tightlock coupler auxiliary coupling device, comprising a front coupler (1), characterized in that: The outer wall of the front coupler (1) is fitted with a rear coupler (2). The outer wall of the front coupler (1) is fixedly fitted with a control plate (3). The outer wall of the rear coupler (2) is fixedly fitted with a laser rangefinder (4). The outer wall of the rear coupler (2) is fixedly fitted with a fixing cylinder (5). The outer wall of the front coupler (1) is fixedly fitted with a plug rod (6). The outer wall of the fixing cylinder (5) is fixedly fitted with a locking box (7). The inner cavity of the locking box (7) is movably fitted with a locking plate (8). The outer wall of the locking plate (8) is fixedly fitted with a pull rod (10). The outer wall of the pull rod (10) is movably fitted with a drive spring (11). The outer wall of the fixing cylinder (5) is fixedly fitted with a limit rod (12). The outer wall of the fixing cylinder (5) is fixedly fitted with a drive cylinder (13). The outer wall of the locking plate (8) is fixedly fitted with a limit post (15). The outer wall of the locking box (7) is provided with a sliding groove (14).
2. The tightlock coupler auxiliary coupling device according to claim 1, characterized in that: The outer wall shape of the insertion rod (6) matches the outer wall shape of the fixing cylinder (5), and the outer wall shape of the locking plate (8) matches the inner wall shape of the locking groove (9).
3. The tightlock coupler auxiliary coupling device according to claim 1, characterized in that: The two ends of the outer wall of the drive spring (11) are in contact with the inner wall of the locking box (7) and the outer wall of the locking plate (8), respectively, and the drive spring (11) is made of high carbon steel.
4. The tightlock coupler auxiliary coupling device according to claim 1, characterized in that: The output shaft of the drive cylinder (13) contacts the outer wall of the pull rod (10), and the pull rod (10) is movably sleeved on the outer wall of the limit rod (12).
5. The tightlock coupler auxiliary coupling device according to claim 1, characterized in that: The limiting post (15) passes through the inner cavity of the sliding groove (14), the pull rod (10) passes through the outer wall of the locking box (7) and is connected to the locking plate (8), and the installation position of the measuring and control plate (3) corresponds to the installation position of the laser rangefinder (4).
6. The tightlock coupler auxiliary coupling device according to claim 1, characterized in that: There are two fixing cylinders (5), and the two fixing cylinders (5) are respectively installed on both sides of the outer wall of the rear hook (2).