Coupler telescopic device

Abstract

The utility model relates to a car coupler telescopic device which comprises a shell, a traction rod, a locking ring and a rotating rod. Wherein the traction rod is telescopically sleeved in the shell; the locking ring is fixed to the end, located in the shell, of the traction rod, and an axial through groove is formed in the inner wall. One end of the rotating rod is rotatably connected with the shell, and the other end is provided with a protrusion; the protruding part is matched with the through groove in shape so as to be centered with the through groove and penetrate through the through groove when the traction rod stretches out and draws back, the protruding part and the through groove are in a staggered state by rotating the rotating rod when stretching out of the traction rod is completed, limiting blocking of the locking ring is achieved, and stretching out locking of the traction rod is completed. According to the utility model, the locking ring is arranged at the end part of the draw bar and is matched with the draw bar to lock the stretching state of the draw bar, so that the diameters of other positions, except the non-open end of the shell, of the whole hook are reduced, and the interference with other structures below a vehicle is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of rail vehicle technology, and in particular relates to a coupler telescopic device. Background Technology

[0002] The coupler and buffer system is a key component at both ends of a train, used to connect, traction, and buffer trains. For rescue or multiple-unit operation, the coupler needs to meet certain length requirements. However, in some cases, space at the front of the train car is limited; therefore, a coupler and buffer system with a telescopic mechanism is required. This allows the coupler to extend and lock in its length when needed, and retract to reduce the overall volume of the coupler after use.

[0003] To achieve locking of the coupler's extended and retracted states, existing technologies typically add additional locking mechanisms such as locking rings and unlocking cylinders to the front end of the telescopic device. However, as train speeds continue to increase, the requirements for streamlined car bodies to reduce wind resistance are becoming increasingly stringent, resulting in sharper front-end designs and more compact internal spaces. While this design achieves the telescopic locking function, it also leads to a larger outer diameter in the middle of the coupler body, making it prone to interference with undercarriage structures such as the car body beams when the coupler swings. Utility Model Content

[0004] The purpose of this utility model is to solve one of the above-mentioned technical problems and provide a coupler telescopic device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A coupler telescopic device, comprising:

[0007] case;

[0008] The tow rod has one end that can be telescopically fitted inside the housing, and the other end that extends to the outside of the housing;

[0009] A locking ring is fixed to the end of the traction rod located inside the housing, and its inner wall is provided with an axial through groove;

[0010] The rotating rod has one end rotatably connected to the housing, and the outer wall of the other end is provided with a protrusion;

[0011] The protrusion matches the shape of the through groove so that it aligns with and passes through the through groove during the extension and retraction of the traction rod, thus completing the extension and retraction. When the traction rod is fully extended, rotating the rotating rod causes the protrusion and the through groove to be misaligned, thereby limiting and blocking the locking ring and the traction rod, and completing the extension locking of the traction rod.

[0012] In some embodiments of this utility model, the traction rod is a hollow sleeve-shaped structure. When the traction rod is in a retracted state inside the housing, the end of the rotating rod with a protrusion is fitted inside the traction rod via a locking ring.

[0013] In some embodiments of this utility model, multiple protrusions are provided circumferentially along the outer wall of the rotating rod, and multiple through grooves are provided corresponding to the protrusions.

[0014] In some embodiments of this utility model, it further includes: a telescopic electric cylinder, the cylinder body of which is installed on the outside of the housing, and the extended end is connected to the traction rod to drive the traction rod to perform telescopic movement.

[0015] In some embodiments of this utility model, it further includes: a locking electric cylinder, the cylinder body of which is connected to the housing, and the extended end of which is connected to the rotating rod. When the extended end of the locking electric cylinder is energized and extends, it drives the rotating rod to rotate.

[0016] In some embodiments of this utility model, the locking electric cylinder is installed on the outside of the housing;

[0017] The housing has a circumferentially extending through hole, and a locking pin connected to the rotating shaft is installed in the through hole.

[0018] The extended end of the locking electric cylinder is connected to the locking pin through a linkage assembly, so that when the extended end of the locking electric cylinder extends or retracts, the linkage assembly drives the locking pin to move circumferentially along the through hole, thereby driving the rotating rod to rotate.

[0019] In some embodiments of this utility model, the linkage component includes a rotating arm and an elastic rod. The rotating arm is rotatably connected to the outer wall of the housing. One end of the rotating arm is connected to the extended end of the locking electric cylinder, and the other end is connected to the locking pin through the elastic rod.

[0020] In some embodiments of this utility model, a first pin hole is provided at the end where the elastic rod is connected to the rotating arm, and a second pin hole is provided at the end where the rotating arm is connected to the elastic rod. The elastic rod and the rotating arm are hinged by a pin that passes through the first pin hole and the second pin hole.

[0021] In some embodiments of this utility model, a connector is fixed at the end where the rotating arm connects to the elastic rod, and a third pin hole is opened at the end of the connector extending in the direction of the elastic rod. The elastic rod and the rotating arm are hinged by a pin that passes through the first pin hole and the third pin hole.

[0022] In some embodiments of this utility model, an anti-detachment part is provided at one end of the traction rod extending from the housing.

[0023] The beneficial effects of this utility model are as follows:

[0024] 1. This utility model installs a locking ring at the end of the tow bar, and locks the tow bar in the extended state by cooperating with the locking ring through a rotating shaft set at the non-open end of the housing. This significantly reduces the outer diameter of the open end of the housing, thereby reducing the diameter of the entire hook except at the non-open end of the housing, effectively avoiding interference with other structures under the vehicle.

[0025] 2. This utility model uses a telescopic electric cylinder to drive the extension and retraction of the traction rod, realizing the separation of extension locking and retraction locking. In the retracted state, self-locking is achieved by relying on the mechanical unhooking inside the electric cylinder, which greatly simplifies the operation process of retraction locking.

[0026] 3. In this utility model, there are two connection positions between the elastic rod and the rotating arm, which are compatible with both automatic and manual operation modes. In the event of power failure, the rotating rod can be manually operated by selecting the corresponding connection position, ensuring that the rotating rod can rotate and cooperate with the traction rod to extend and lock in the event of power failure. The operation process is simple and convenient. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a coupler telescopic device.

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure of the shell and the rotating rod;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of the traction rod;

[0031] Figure 4 A cross-sectional structural diagram of the retracted traction rod;

[0032] Figure 5 A cross-sectional structural diagram showing the traction rod in the extended state;

[0033] Figure 6 A schematic diagram of the connection structure of the automatic operation state linkage component;

[0034] Figure 7 A schematic diagram of the connection structure of the manual operation state linkage component;

[0035] The attached figures are labeled as follows:

[0036] 1. Shell; 11. Anti-detachment part;

[0037] 2. Towing rod;

[0038] 3. Locking ring; 31. Through groove;

[0039] 4. Rotating rod; 41. Protrusion;

[0040] 5. Telescopic electric cylinder;

[0041] 6. Lock the electric cylinder;

[0042] 7. Linkage assembly; 71. Rotating arm; 711. Second pin hole; 712. Third pin hole; 72. Elastic rod; 721. First pin hole;

[0043] 8. Locking pin. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0045] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without any creative effort.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0047] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The technical solution of this utility model will be described in detail below with reference to specific embodiments and the accompanying drawings.

[0050] As attached Figure 1 -Appendix Figure 7 As shown in the schematic embodiment of the coupler telescopic device of this utility model, the telescopic device includes a housing 1, a traction rod 2, a locking ring 3, and a rotating rod 4.

[0051] The shell 1 is a sleeve-shaped structure with one open end and the other closed end.

[0052] One end of the traction rod 2 is telescopically fitted inside the housing 1, and the other end extends to the outside of the housing 1 through the open end of the housing 1. The traction rod 2 can slide axially inside the housing 1 to achieve the telescopic function.

[0053] The locking ring 3 and the traction rod 2 are coaxially arranged and fixedly installed at the end of the traction rod 2 located inside the housing 1. The inner wall of the locking ring 3 is provided with an axial through groove 31. The locking ring 3 moves synchronously with the traction rod 2. When the traction rod 2 is fully retracted, the locking ring 3 is located at the non-open end of the housing 1. When the traction rod 2 is fully extended, the locking ring 3 moves with the traction rod 2 to a position close to the open end of the housing 1.

[0054] The rotating rod 4 is coaxially arranged with the traction rod 2. One end of the rotating rod 4 is rotatably connected to the non-open end of the housing 1 and can rotate axially relative to the housing 1. The outer wall of the other end is provided with a protrusion 41.

[0055] The protrusion 41 on the rotating rod 4 matches the shape of the through groove 31 on the inner wall of the locking ring 3, so that when the traction rod 2 extends and retracts, it aligns with and passes through the through groove 31, allowing the traction rod 2 to complete its extension and retraction. Furthermore, when the traction rod 2 is fully extended, rotating the rotating rod 4 can cause the protrusion 41 and the through groove 31 to be misaligned, thereby limiting and blocking the locking ring 3 and the traction rod 2, bearing the longitudinal compressive load on the coupler, and completing the extension locking of the traction rod 2.

[0056] In the above illustrative embodiment, the locking ring is installed at the end of the tow bar, and the tow bar is locked in the extended state by the cooperation of the rotating shaft set at the non-open end of the housing with the locking ring. This greatly reduces the outer diameter of the open end of the housing, thereby reducing the diameter of the entire hook except at the non-open end of the housing, effectively avoiding interference with other structures under the vehicle.

[0057] In some embodiments of this utility model, as shown in the appendix Figure 3 As shown, the traction rod 2 is a hollow sleeve-shaped structure. When the traction rod 2 is in the retracted state inside the housing 1, one end of the rotating rod 4 with a protrusion 41 passes through the locking ring 3 and is sleeved inside the traction rod 2.

[0058] In some embodiments of this utility model, as shown in the appendix Figure 2 As shown, multiple protrusions 41 are arranged circumferentially along the outer wall of the rotating rod 4, forming an external spline structure.

[0059] Multiple through slots 31 are provided corresponding to protrusions 41, forming an internal spline structure that matches the external spline structure.

[0060] In some embodiments of this utility model, in order to reduce the outer diameter of the housing 1, a telescopic electric cylinder 5 with a power-off self-locking function is further included. The cylinder body of the telescopic electric cylinder 5 is fixedly installed on the outer wall of the housing 1, and the extended end of the telescopic electric cylinder 5 is connected to the traction rod 2 to drive the traction rod 2 to perform telescopic movement.

[0061] In the above illustrative embodiment, an electric drive scheme is adopted, which can separate the extension locking and retraction locking devices of the traction rod 2. That is, when a large longitudinal force needs to be transmitted in the extension state, the locking is still achieved by driving the locking ring 3 to rotate. In the retraction state, the self-locking is achieved by mechanical unhooking inside the electric cylinder, thus eliminating the locking action when the coupler retracts.

[0062] In some embodiments of this utility model, a locking electric cylinder 6 is further included. The cylinder body of the locking electric cylinder 6 is fixedly connected to the housing 1, and the extended end of the locking electric cylinder 6 is connected to the rotating rod 4. When the extended end of the locking electric cylinder 6 is energized and extends, it drives the rotating rod 4 to rotate.

[0063] In some embodiments of this utility model, in order to reduce the outer diameter of the housing 1, the locking electric cylinder 6 is fixedly installed on the outer wall near the non-open end of the housing 1.

[0064] The housing 1 has a circumferentially extending through hole, and a locking pin 8 connected to the rotating shaft is provided in the through hole.

[0065] The extended end of the locking electric cylinder 6 is connected to the locking pin 8 through the linkage assembly 7, so that when the extended end of the locking electric cylinder 6 extends or retracts, the linkage assembly 7 drives the locking pin 8 to move circumferentially along the through hole, thereby driving the rotating rod 4 to rotate.

[0066] In some embodiments of this utility model, as shown in the appendix Figure 6 -Appendix Figure 7 As shown, the linkage assembly 7 includes a rotating arm and an elastic rod 72. The rotating arm is rotatably connected to the outer wall of the housing 1. One end of the rotating arm is connected to the extended end of the locking electric cylinder 6, and the other end is connected to the locking pin 8 through the elastic rod 72.

[0067] Among them, the elastic rod 72 can play a buffering role in the force transmission process, avoiding structural damage during the locking process.

[0068] The locking electric cylinder 6 can drive the rotating arm to move the elastic rod 72. The elastic rod 72 is linked to the rotating rod 4 inside the housing 1 through the locking pin 8. Thus, when the locking electric cylinder 6 is energized and pushed out, it can drive the rotating rod 4 to rotate through the rotating arm, the elastic rod 72 and the locking pin 8.

[0069] In some embodiments of this utility model, as shown in the appendix Figure 6 -Appendix Figure 7 As shown, the end of the elastic rod 72 connected to the rotating arm has a first pin hole 721, and the end of the rotating arm connected to the elastic rod 72 has a second pin hole 711. The elastic rod 72 and the rotating arm are hinged by a pin that passes through the first pin hole 721 and the second pin hole 711.

[0070] In some embodiments of this utility model, as shown in the appendix Figure 6 -Appendix Figure 7 As shown, the end of the rotating arm connected to the elastic rod 72 is fixed with a connector perpendicular to the rotating arm. The end of the connector extending towards the elastic rod 72 has a third pin hole 712, which serves as a backup pin for manual operation. During manual operation, the pin between the first pin hole 721 and the second pin hole 711 can also be removed, so that the elastic rod 72 and the rotating arm are hinged by a pin that passes through the first pin hole 721 and the third pin hole 712, thereby improving the manual operability in the absence of electricity and air.

[0071] In some embodiments of this utility model, an anti-detachment part 21 is provided at one end of the traction rod 2 extending from the housing 1 to prevent the traction rod 2 from detaching from the housing 1 after assembly.

[0072] As attached Figure 3 -Appendix Figure 4 As shown, the working principle of this utility model is as follows:

[0073] When the traction rod 2 is in the retracted state, the telescopic electric cylinder 5 is de-energized. The telescopic electric cylinder 5 has a power-off self-locking function, which locks the relative position of the housing 1 and the traction rod 2, ensuring that the telescopic mechanism is in the retracted state.

[0074] When the telescopic electric cylinder 5 is energized, it pushes the traction rod 2 to extend until it reaches its maximum extension length, at which point the telescopic electric cylinder 5 stops. During the extension process, the inner spline structure of the locking ring 3 and the outer spline structure at the end of the rotating rod 4 are misaligned. The protrusion of the rotating rod 4 and the through groove 31 of the locking ring 3 are aligned in a one-to-one correspondence. The protrusion of the rotating rod 4 can pass through the through groove 31 of the locking ring 3, thus completing the extension of the traction rod 2.

[0075] After the traction rod 2 is fully extended, the locking cylinder 6 is energized, pushing the rotating arm to rotate. This rotation, via the elastic rod 72, drives the rotating rod 4 inside the housing 1 to rotate. After the external spline structure at the end of the rotating rod 4 rotates, it coincides with the internal spline structure of the locking ring 3 to transmit the longitudinal compressive load on the coupler. When the locking cylinder 6 is fully extended, the rotating rod 4 is locked in place, ensuring that the extended position can safely and reliably bear the longitudinal load.

[0076] When the traction rod 2 needs to retract, first control the locking electric cylinder 6 to retract, driving the rotating shaft to rotate until the external spline structure of the rotating shaft and the internal spline structure of the locking ring 3 return to their misaligned relationship. At this time, control the telescopic electric cylinder 5 to retract, allowing the internal spline structure of the locking ring 3 to pass through the external spline structure at the end of the rotating rod 4 until the traction rod 2 retracts into place. After retracting into place, the telescopic electric cylinder 5 is de-energized and self-locks, keeping the traction rod 2 in the retracted and locked position.

[0077] When the system is without power or air, it can be operated manually. Manually loosen the connecting bolts between the telescopic electric cylinder 5 and the traction rod 2. At this time, the retraction lock is released. Manually pull out the traction rod 2 until it reaches its maximum length. Manually loosen the pins connecting the first pin hole 721 of the elastic rod 72 and the second pin hole 711 at the end of the rotating arm. Manually push the elastic rod 72, which will drive the rotating rod 4 to rotate to the extended locking position. Connect the first pin hole 721 of the elastic connecting rod with the second pin hole 711 of the rotating arm to complete the extension locking.

[0078] Some embodiments of this utility model further provide a coupler, including a coupler telescopic device, wherein the coupler telescopic device is the aforementioned coupler telescopic device.

[0079] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0080] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A vehicle coupling retraction device, characterised in that, include: case; A traction rod, one end of which is retractably fitted inside the housing, and the other end extending to the outside of the housing; A locking ring is fixed to the end of the traction rod located inside the housing, and its inner wall is provided with an axial through groove; A rotating rod, one end of which is rotatably connected to the housing, and the outer wall of the other end is provided with a protrusion; The protrusion matches the shape of the through groove so that it aligns with and passes through the through groove when the traction rod extends or retracts, allowing the traction rod to complete its extension and retraction. When the traction rod is fully extended, rotating the rotating rod causes the protrusion and the through groove to be misaligned, thereby limiting and blocking the locking ring and locking the extension of the traction rod.

2. A vehicle drawgear arrangement according to claim 1, characterised in that, The traction rod is a hollow sleeve-shaped structure. When the traction rod is in the retracted state inside the housing, the end of the rotating rod with the protrusion is sleeved inside the traction rod through the locking ring.

3. A vehicle drawgear arrangement according to claim 1 or 2, characterised in that, Multiple protrusions are provided along the circumferential direction of the outer wall of the rotating rod, and multiple through slots are provided corresponding to the protrusions.

4. A vehicle drawgear arrangement according to claim 1, wherein Further includes: A telescopic electric cylinder, the cylinder body of which is installed on the outside of the housing, and the extended end is connected to the traction rod to drive the traction rod to perform telescopic movement.

5. A vehicle drawbar arrangement according to claim 1, wherein Further includes: The locking electric cylinder has its cylinder body connected to the housing and its extended end connected to the rotating rod. When the extended end of the locking electric cylinder is energized and extends, it drives the rotating rod to rotate.

6. A vehicle drawgear arrangement according to claim 5, characterised in that The locking electric cylinder is installed on the outside of the housing; The housing has a circumferentially extending through hole, and a locking pin connected to the rotating rod is provided in the through hole. The extended end of the locking electric cylinder is connected to the locking pin via a linkage assembly, so that when the extended end of the locking electric cylinder extends or retracts, the linkage assembly drives the locking pin to move circumferentially along the through hole, thereby driving the rotating rod to rotate.

7. A vehicle drawgear arrangement according to claim 6, characterised in that, The linkage assembly includes a rotating arm and an elastic rod. The rotating arm is rotatably connected to the outer wall of the housing. One end of the rotating arm is connected to the extended end of the locking electric cylinder, and the other end is connected to the locking pin through the elastic rod.

8. A vehicle drawgear arrangement according to claim 7, characterised in that, The end of the elastic rod connected to the rotating arm has a first pin hole, and the end of the rotating arm connected to the elastic rod has a second pin hole. The elastic rod and the rotating arm are hinged by a pin that passes through the first pin hole and the second pin hole.

9. A vehicle drawgear arrangement according to claim 8, characterised in that, The end of the rotating arm connected to the elastic rod is fixed with a connector, and the end of the connector extending toward the elastic rod has a third pin hole. The elastic rod and the rotating arm are hinged by a pin that passes through the first pin hole and the third pin hole.

10. The draft gear assembly of claim 1, wherein, An anti-detachment part is provided at one end of the traction rod extending from the housing.

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