Elastic draw bar

Abstract

The utility model discloses an elastic draw bar, and belongs to the field of mechanical devices. The auxiliary traction rod is connected with the main traction rod; the towing hook is fixed on the auxiliary towing rod; the spring is sleeved on the auxiliary traction rod; the first clamping pin and the second clamping pin are fixed on the auxiliary traction rod in a sleeving manner; the two ends of the spring abut against the main traction rod and the first clamping pin respectively. Under the action of traction force, the auxiliary traction rod is pulled outwards, so that the annular outwards-protruding structure at the front end of the auxiliary traction rod is clamped and fixed to the inner side of the annular inwards-protruding structure at the rear end of the main traction rod; when the auxiliary traction rod is subjected to external impact force and vibration, the side face of the first clamping pin can compress the spring, the annular outward protruding structure at the front end of the auxiliary traction rod can slide towards the rear end along the cavity of the main traction rod, the external impact force and vibration or sudden loads can be buffered, and the external impact force and vibration are effectively absorbed and relieved; friction and impact between the elastic traction rod and a traction object are reduced, the service life of the elastic traction rod is prolonged, and the traction stability and safety are improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical device technology, specifically, it is an elastic traction rod for transmitting traction force. Background Technology

[0002] In existing technology, a drawbar is typically a mechanical device used to transmit traction force and connect moving parts. It is mainly used in the towing operations of vehicles, agricultural machinery, and engineering equipment, providing traction and tension support during the towing process. Existing drawbars come in two forms: one is made of rigid materials (such as steel or alloys), which maintains the stability and positioning of the object by transmitting traction force during use. The other is composed of a rope combined with elastic materials (such as rubber or nylon), which can produce elastic deformation during traction, thereby mitigating some impact forces.

[0003] However, existing tow bars have the following shortcomings in design and application:

[0004] 1. Inconvenient to carry: Existing tow poles are typically made of rigid materials with complex designs, resulting in heavy weight and large size. This makes them difficult to carry and deploy, especially in situations requiring frequent movement or temporary use. The size and weight of existing tow poles limit their application scenarios, particularly in emergency situations or environments requiring high mobility, making them less flexible in use.

[0005] 2. Lack of Buffering Function: Most existing drawbars are not designed with effective buffering functions. During towing, especially at high speeds or on uneven ground, existing drawbars may not be able to effectively absorb external impacts or sudden reaction forces, resulting in an unstable towing effect. This can lead to severe vibrations during towing, affecting operational stability and, in severe cases, causing wear and damage to the equipment itself or the towed object. For example, when towing heavy machinery or vehicles, sudden changes in tension may overload the drawbar or even damage it.

[0006] 3. Poor Safety and Stability: Existing drawbars typically rely on rigid connections, which cannot effectively absorb impact forces or vibrations from the traction load during traction. In some applications, especially when tractioning irregularly shaped objects or under high load conditions, rigid traction may lead to damage to the drawbar or the structure of the traction object. Furthermore, while existing drawbars designed with elastic materials can absorb some impact to a certain extent, they cannot effectively mitigate large instantaneous load changes. Under high speed or drastic load changes, a significant reaction force will still be generated between the traction object and the drawbar, potentially causing damage to the drawbar or the structure of the traction object, thus reducing the safety and stability of the traction process. Utility Model Content

[0007] Therefore, in order to solve the problems of poor portability, lack of buffer function, poor safety and stability of existing tow bars, this utility model provides an elastic tow bar for transmitting traction force.

[0008] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0009] This utility model provides an elastic traction rod, which specifically includes the following parts:

[0010] Main traction rod;

[0011] A secondary traction rod connected to the main traction rod;

[0012] A tow hook fixed to the secondary traction bar;

[0013] The spring fitted onto the secondary traction bar;

[0014] Both the first and second locking pins are fitted and fixed to the auxiliary traction rod;

[0015] The connection between the tow hook and the auxiliary traction rod is located between the first and second locking pins.

[0016] One end of the spring abuts against the main traction rod, and the other end abuts against the first locking pin.

[0017] As a preferred embodiment, the elastic traction rod provided by this utility model further includes: a base support; the base support is fixed on the main traction rod.

[0018] In a preferred embodiment, the base is provided with internal threads.

[0019] In a preferred embodiment, the base is provided with external threads.

[0020] In a preferred embodiment, the base is provided with threads; the threads are in the form of a combination of internal and external threads.

[0021] In a preferred embodiment, the rear end of the main traction rod is provided with an annular inward protrusion structure, and the entire structure has a cavity inside.

[0022] In a preferred embodiment, the front end of the auxiliary traction rod is provided with an annular outward protrusion structure, which extends into the cavity of the main traction rod. When the auxiliary traction rod is pulled outward, the annular outward protrusion structure at the front end of the auxiliary traction rod is locked inside the annular inward protrusion structure at the rear end of the main traction rod.

[0023] As a preferred embodiment, the elastic traction rod provided by this utility model further includes: a spring protection cylinder; the spring protection cylinder is fixed on the main traction rod.

[0024] In a preferred embodiment, the spring protection cylinder has a hollow cylindrical structure, and the spring is placed inside the spring protection cylinder.

[0025] In a preferred embodiment, the tow hook has a fixing ring at one end and a hook at the other end; the fixing ring is fitted and fixed on the auxiliary traction rod, and the first locking pin and the second locking pin are located on both sides of the fixing ring.

[0026] The beneficial effects of this utility model are:

[0027] 1. Improved Portability: This invention, through optimized structural design, reduces the weight and size of the elastic tow bar, resulting in a simple structure that is easy to carry and operate, thus enhancing its flexibility and mobility. Compared to the heavy-duty design of existing tow bars, this invention makes the elastic tow bar more flexible in different working environments, especially suitable for scenarios requiring frequent handling and temporary use.

[0028] 2. Enhanced Buffering Function to Reduce Wear and Damage and Extend Service Life: Existing tow bars typically lack effective buffering mechanisms. Especially during traction, sudden load changes or significant impacts can damage the elastic tow bar and the object being towed. Over long-term use, this can lead to wear and tear on both, affecting their service life. To address this issue, this invention introduces a buffering mechanism. By installing a spring on the secondary tow bar, a buffering function is provided. This effectively absorbs and mitigates external impacts and vibrations during traction, reducing friction and impact between the elastic tow bar and the object being towed. This significantly reduces wear, extends the service life of the elastic tow bar and its related components, and improves overall stability, durability, and safety.

[0029] 3. Enhanced Safety and Stability: The elastic traction rod provided by this utility model can be applied to any working environment requiring traction, making it highly adaptable. Furthermore, this elastic traction rod does not rely entirely on rigid connections; by installing springs on the secondary traction rod to provide a buffering function, it can effectively suppress sudden loads and impacts during traction, preventing damage to the elastic traction rod or loss of control of the traction object due to excessive external force. This improves the safety and stability of the elastic traction rod during use, reduces the risk of accidents caused by equipment failure or improper operation, and allows for flexible application in various scenarios. Attached Figure Description

[0030] Figure 1This utility model provides a schematic diagram of the structural composition of an elastic traction rod for transmitting traction force.

[0031] Figure 2 This utility model provides a schematic diagram of the structural composition of an elastic traction rod for transmitting traction force.

[0032] Figure 3 A schematic diagram showing the connection between the main traction rod and the auxiliary traction rod.

[0033] Figure 4 This is a schematic diagram of the tow hook structure.

[0034] In the diagram, 1. Base support; 2. Main traction rod; 3. Spring protection cylinder; 4. Secondary traction rod; 5. Tow hook; 6. First locking pin; 7. Second locking pin; 8. Spring. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings.

[0036] See Figures 1 to 4 The present invention provides an elastic traction rod for transmitting traction force, which mainly includes: a base 1, a main traction rod 2, a spring protection cylinder 3, a secondary traction rod 4, a tow hook 5, a first locking pin 6, a second locking pin 7, and a spring 8.

[0037] In this embodiment, the base support 1 is fixed to the front end of the main traction rod 2, and the base support 1 is provided with threads to facilitate connection with external equipment.

[0038] Specifically, the thread type on the base 1 can be a single internal thread, a single external thread, or a combination of internal and external threads.

[0039] In this embodiment, the front end of the spring protection cylinder 3 is fixedly connected to the rear end face of the main traction rod 2.

[0040] Specifically, the structure of the main traction rod 2 is as follows: Figure 3 As shown, its rear end has an annular inward protruding structure 201, and its overall interior has a cavity 202.

[0041] Specifically, the spring protection cylinder 3 has a hollow cylindrical structure.

[0042] In this embodiment, the front end of the auxiliary traction rod 4 is connected to the rear end of the main traction rod 2.

[0043] Specifically, the structure of the auxiliary traction rod 4 is as follows: Figure 3 As shown, its front end is provided with an annular outward protrusion structure 401.

[0044] The specific connection between the main traction rod 2 and the auxiliary traction rod 4 is as follows: Figure 3 As shown, specifically, the annular outward protrusion structure 401 at the front end of the auxiliary traction rod 4 extends into the cavity 202 of the main traction rod 2. When the auxiliary traction rod 4 is pulled outward, the annular outward protrusion structure 401 at the front end of the auxiliary traction rod 4 can be locked inside the annular inward protrusion structure 201 at the rear end of the main traction rod 2.

[0045] In this embodiment, the specific connection between the tow hook 5, the first locking pin 6, the second locking pin 7, and the auxiliary traction rod 4 is as follows: Figure 1 and Figure 2 As shown, the set of the second locking pin 7, the tow hook 5, and the first locking pin 6 is fixed to the front end of the auxiliary traction rod 4 in the order of the second locking pin 7, the tow hook 5, and the first locking pin 6.

[0046] Specifically, the structure of the tow hook 5 is as follows: Figure 4 As shown, a fixing ring 501 is provided at one end, and a hook 502 is provided at the other end.

[0047] The fixing ring 501 of the tow hook 5 is fixed to the front end of the auxiliary traction rod 4. The first locking pin 6 and the second locking pin 7 are located on both sides of the fixing ring 501 of the tow hook 5, and the first locking pin 6 and the second locking pin 7 play a role in strengthening the fixation of the tow hook 5.

[0048] In this embodiment, the spring 8 is fitted onto the auxiliary traction rod 4, with its front end abutting against the rear end face of the main traction rod 2 and its rear end abutting against the first locking pin 6. The spring 8 is also housed within the spring protective sleeve 3. When the auxiliary traction rod 4 is subjected to external pressure, the spring 8 is compressed by the side of the first locking pin 6. At this time, the annular outward protrusion 401 at the front end of the auxiliary traction rod 4 slides along the cavity 202 of the main traction rod 2 toward the rear end of the main traction rod 2.

[0049] This utility model provides an elastic traction rod for transmitting traction force. In use, it can be connected to the external to be towed mechanism via a threaded connection through the base 1, and then connected to the external trailer via the tow hook 5. The towing operation of the towed mechanism can be realized by starting the trailer. When the trailer is started, the auxiliary tow bar 4 is pulled outward under the action of traction force, thereby locking the annular outward protrusion structure 401 at the front end of the auxiliary tow bar 4 into the inner side of the annular inward protrusion structure 201 at the rear end of the main tow bar 2. During the towing process, when the auxiliary tow bar 4 is subjected to external impact force and vibration or sudden load, the spring 8 will be compressed by the side of the first locking pin 6. At this time, the annular outward protrusion structure 401 at the front end of the auxiliary tow bar 4 will slide along the cavity 202 of the main tow bar 2 towards the rear end of the main tow bar 2. This can buffer the external impact force and vibration or sudden load, effectively absorb and reduce the external impact force and vibration during the towing process, reduce the friction and impact between the elastic tow bar and the towed object, thereby effectively reducing wear, extending the service life of the elastic tow bar and its related components, and improving the overall stability, durability and safety of the elastic tow bar.

[0050] The present invention provides an elastic traction rod with a simple structure, easy to carry and operate, high safety, stability and flexibility, and has certain application prospects.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An elastic traction rod, characterized in that, include: Main traction rod (2); A secondary traction rod (4) connected to the main traction rod (2); A tow hook (5) fixed to the auxiliary traction rod (4); Spring (8) fitted onto the secondary traction rod (4); The first locking pin (6) and the second locking pin (7) are both fixed on the auxiliary traction rod (4); The connection between the tow hook (5) and the auxiliary traction rod (4) is located between the first locking pin (6) and the second locking pin (7); One end of the spring (8) abuts against the main traction rod (2), and the other end abuts against the first locking pin (6).

2. The elastic traction rod according to claim 1, characterized in that, Also includes: Base support (1); the base support (1) is fixed on the main traction rod (2).

3. The elastic traction rod according to claim 2, characterized in that, The base (1) is provided with internal threads.

4. The elastic traction rod according to claim 2, characterized in that, The base (1) is provided with external threads.

5. The elastic traction rod according to claim 2, characterized in that, The base (1) is provided with threads; the threads are in the form of a combination of internal and external threads.

6. The elastic traction rod according to claim 1, characterized in that, The main traction rod (2) has an annular inward protrusion structure (201) inside its rear end, and a cavity (202) is provided inside its entire body.

7. The elastic traction rod according to claim 6, characterized in that, The front end of the auxiliary traction rod (4) is provided with an annular outward protrusion structure (401). The annular outward protrusion structure (401) at the front end of the auxiliary traction rod (4) extends into the cavity (202) of the main traction rod (2). When the auxiliary traction rod (4) is pulled outward, the annular outward protrusion structure (401) at the front end of the auxiliary traction rod (4) is locked inside the annular inward protrusion structure (201) at the rear end of the main traction rod (2).

8. The elastic traction rod according to claim 1, characterized in that, Also includes: Spring protection cylinder (3); the spring protection cylinder (3) is fixed on the main traction rod (2).

9. The elastic traction rod according to claim 8, characterized in that, The spring protection cylinder (3) has a hollow cylindrical structure, and the spring (8) is placed inside the spring protection cylinder (3).

10. The elastic traction rod according to claim 1, characterized in that, The tow hook (5) has a fixing ring (501) at one end and a hook (502) at the other end; the fixing ring (501) is fixed on the auxiliary traction rod (4), and the first locking pin (6) and the second locking pin (7) are located on both sides of the fixing ring (501).

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