Anti-locking trailer arm assembly

Abstract

The utility model relates to the technical field of trailer arms, in particular to an anti-locking trailer arm assembly. According to the technical scheme, the device comprises a trailer ball head, a connecting transverse plate and a connecting rod, an L-shaped plate is fixedly connected to one side of the outer surface of the connecting transverse plate, the trailer ball head is fixedly installed on the upper surface of the L-shaped plate, a through hole is formed in the upper surface of the connecting transverse plate, and a sliding rod and a protective cover are fixedly connected to the positions, close to the two ends, of the lower surface of the connecting rod respectively. And the sliding rod penetrates through the through hole, a spiral spring is spirally wound on the position, located below the connecting transverse plate, of the outer surface of the sliding rod, and a limiting block is fixedly connected to the bottom end of the sliding rod. According to the trailer ball head sealing device, the trailer ball head which is not used can be sealed and protected conveniently, so that the situation that dirt and other impurities adhere to the outer surface of the trailer ball head, and consequently large friction loss occurs between the trailer ball head and the ball socket in the using process is avoided, the service life of the trailer ball head is prolonged, and meanwhile the clamping phenomenon is avoided.

Description

Technical Field

[0001] This utility model relates to the field of trailer arm technology, specifically to a trailer arm assembly designed to prevent jamming. Background Technology

[0002] Trailer boom assemblies are high-efficiency components designed specifically for vehicle towing needs. Their towing connection section typically employs a unique spherical design, with the ball joint flexibly adapting to the connection devices of various towed vehicles. This provides a stable and multi-angle connection, greatly enhancing steering flexibility during towing and avoiding steering obstruction caused by rigid connections. The boom body is usually carefully forged from high-strength steel to ensure sufficient strength and toughness to withstand the enormous pulling force during towing. Trailer boom assemblies are widely used in RV towing, breakdown vehicle rescue, and short-distance towing of engineering equipment, providing reliable and flexible solutions for various towing operations.

[0003] Currently, during the use of trailer boom assemblies, the trailer ball joint is usually exposed to the external environment. As a result, dirt and impurities inevitably adhere to the surface of the trailer ball joint. When the trailer ball joint enters the ball socket inside the ball joint cover and swings, significant friction damage inevitably occurs between the two, reducing the service life of the trailer ball joint and even causing the ball joint to jam inside the ball socket. To address this, we propose a trailer boom assembly that prevents jamming. Utility Model Content

[0004] The purpose of this utility model is to provide a trailer boom assembly that prevents jamming. It effectively seals and protects the trailer ball joint when not in use, preventing dirt and other impurities from adhering to the outer surface of the ball joint and causing significant frictional wear between the ball joint and the socket during use. This extends the service life of the trailer ball joint and also prevents jamming. This solves the problem that in current trailer boom assemblies, the trailer ball joint is usually exposed to the external environment, inevitably accumulating dirt and impurities. When the trailer ball joint enters the socket inside the ball joint cover and swings, significant frictional damage inevitably occurs between the two, reducing the service life of the trailer ball joint and even causing the ball joint to jam inside the socket.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a trailer arm assembly for preventing jamming, comprising a trailer ball joint, a connecting cross plate, and a connecting rod. An L-shaped plate is fixedly connected to one side of the outer surface of the connecting cross plate, and the trailer ball joint is fixedly installed on the upper surface of the L-shaped plate. A through hole is provided on the upper surface of the connecting cross plate. A sliding rod and a protective cover are fixedly connected to the lower surface of the connecting rod near both ends, and the sliding rod passes through the through hole. A helical spring is spirally wound on the outer surface of the sliding rod below the connecting cross plate, and a limit block is fixedly connected to the bottom end of the sliding rod.

[0006] Preferably, a limiting ring is fixedly installed on the upper surface of the L-shaped plate at the position below the trailer ball joint, and the outer diameter of the limiting ring is less than or equal to the inner diameter of the protective cover.

[0007] Preferably, the outer diameter of the limiting ring is larger than the outer diameter of the trailer ball joint.

[0008] Preferably, a limiting groove is provided on the upper surface of the connecting cross plate.

[0009] Preferably, a first reinforcing rib is fixedly installed at the corner of the upper surface of the L-shaped plate.

[0010] Preferably, a fixing plate is fixedly connected to the side of the outer surface of the connecting cross plate away from the L-shaped plate, and fixing holes are provided on the outer surface of the fixing plate near the four corners.

[0011] Preferably, a second reinforcing rib is fixedly installed on the upper and lower surfaces of the connecting cross plate and at the connection point of the fixed mounting plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention, through the design of an L-shaped plate, connecting cross plate, through hole, connecting rod, helical spring, limiting block, and protective cover, effectively seals and protects the trailer ball joint when not in use. This prevents dirt and other impurities from adhering to the outer surface of the trailer ball joint, thus avoiding excessive frictional wear between the trailer ball joint and the ball socket during use, extending the service life of the trailer ball joint, and preventing jamming. When the trailer ball joint is not in use, lifting the connecting rod raises the protective cover and sliding rod, compressing the helical spring. Rotating the protective cover to the position above the trailer ball joint causes the connecting rod to descend, inserting the trailer ball joint into the protective cover. The elastic force of the helical spring acts on the protective cover through the sliding rod and connecting rod, ensuring the protective cover stably covers the trailer ball joint. The protective cover seals and protects the trailer ball joint, preventing external dirt and impurities from adhering to its outer surface. When the trailer ball joint is in use, lifting the connecting rod separates the trailer ball joint from the protective cover, and then rotating the connecting rod shifts the protective cover away from the trailer ball joint.

[0014] This utility model achieves the effect of limiting the protective cover covering the trailer ball head by setting a limiting ring. When the trailer ball head enters the inside of the protective cover, the limiting ring is also inserted into the inside of the protective cover at the same time, which limits the protective cover and prevents the protective cover from swinging and causing contact friction with the outer surface of the trailer ball head.

[0015] This utility model achieves the effect of fixing and limiting the protective cover when it is not in use by setting a limiting groove. When the protective cover is not in use, the connecting rod is rotated to move the protective cover away from the trailer ball joint. When the connecting rod enters the limiting groove, it fixes and limits the connecting rod and the protective cover. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial three-dimensional structural diagram of the connecting horizontal plate of this utility model;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the connecting rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the main structure of this utility model.

[0020] Reference numerals: 1. L-shaped plate; 2. Limiting ring; 3. Trailer ball joint; 4. First reinforcing rib; 5. Connecting cross plate; 6. Fixed mounting plate; 7. Second reinforcing rib; 8. Fixing hole; 9. Connecting rod; 10. Protective cover; 11. Through hole; 12. Limiting groove; 13. Limiting block; 14. Helical spring; 15. Slide rod. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. Example 1

[0022] like Figures 1-4As shown, this utility model proposes an anti-jamming trailer arm assembly, including a trailer ball joint 3, a connecting cross plate 5, and a connecting rod 9. An L-shaped plate 1 is fixedly connected to one side of the outer surface of the connecting cross plate 5. The trailer ball joint 3 is fixedly installed on the upper surface of the L-shaped plate 1. A first reinforcing rib 4, which is a triangular plate, is fixedly installed at the corner of the upper surface of the L-shaped plate 1, thereby improving the stress resistance at the corner of the L-shaped plate 1. A through hole 11 is provided on the upper surface of the connecting cross plate 5. A sliding rod 15 and a protective cover 10 are fixedly connected to the lower surface of the connecting rod 9 near both ends, respectively. The sliding rod 15 passes through the through hole 11 and is a circular rod. A spiral spring 14 is spirally wound on the outer surface of the connecting horizontal plate 5 below the connecting horizontal plate 5. A limit block 13 is fixedly connected to the bottom end of the slide rod 15. A fixed mounting plate 6 is fixedly connected to the side of the outer surface of the connecting horizontal plate 5 away from the L-shaped plate 1. Fixing holes 8 are provided on the outer surface of the fixed mounting plate 6 near the four corners. Bolts pass through the fixing holes 8 to fix the fixed mounting plate 6 to the parking space bumper, thereby fixing the trailer arm assembly. Second reinforcing ribs 7 are fixedly installed on the upper and lower surfaces of the connecting horizontal plate 5 and the connection of the fixed mounting plate 6. The second reinforcing rib 7 is a triangular plate to improve the connection strength between the fixed mounting plate 6 and the connecting horizontal plate 5.

[0023] When the trailer ball joint 3 is not in use, the connecting rod 9 is lifted, causing the protective cover 10 and the sliding rod 15 to rise, while the coil spring 14 is compressed. After rotating the protective cover 10 to a position above the trailer ball joint 3, the connecting rod 9 is lowered, and the trailer ball joint 3 is inserted into the protective cover 10. The elastic force of the coil spring 14 acts on the protective cover 10 through the sliding rod 15 and the connecting rod 9, so that the protective cover 10 stably covers the trailer ball joint 3. The protective cover 10 seals and protects the trailer ball joint 3, thus preventing external dirt and impurities from adhering to the outer surface of the trailer ball joint 3. When the trailer ball joint 3 is in use, the connecting rod 9 is lifted to separate the trailer ball joint 3 from the protective cover 10, and then the connecting rod 9 is rotated to make the protective cover 10 and the trailer ball joint 3 misaligned and far apart, thus exposing the trailer ball joint. Example 2

[0024] like Figures 1-3 As shown, the present invention proposes an anti-jamming trailer arm assembly. Compared with Embodiment 1, this embodiment further includes a limiting ring 2 fixedly installed on the upper surface of the L-shaped plate 1 below the trailer ball head 3. The outer diameter of the limiting ring 2 is less than or equal to the inner diameter of the protective cover 10, and the outer diameter of the limiting ring 2 is greater than the outer diameter of the trailer ball head 3. A limiting groove 12 is provided on the upper surface of the connecting cross plate 5.

[0025] In this embodiment, when the trailer ball joint 3 is not in use, the protective cover 10 covers the trailer ball joint 3, and the limiting ring 2 is also inserted into the protective cover 10 at the same time, which plays a limiting role in the protective cover 10 and prevents the protective cover 10 from swinging and causing contact friction with the outer surface of the trailer ball joint 3. When the trailer ball joint 3 is in use, the connecting rod 9 is rotated to make the protective cover 10 move away from the trailer ball joint 3. When the connecting rod 9 enters the limiting groove 12, it plays a fixed limiting role in the connecting rod 9 and the protective cover 10.

[0026] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A hitch ball assembly with anti-stuck trailer arms, comprising a trailer ball (3), a connection cross plate (5) and a connection rod (9), characterized in that: The outer surface side of the connecting horizontal plate (5) is fixedly connected with an L-shaped plate (1), the upper surface of the L-shaped plate (1) is fixedly installed with a trailer ball head (3), the upper surface of the connecting horizontal plate (5) is provided with a through hole (11), the lower surface of the connecting rod (9) is fixedly connected with a slide rod (15) and a protective cover (10) near the two end positions, and the slide rod (15) passes through the through hole (11), the outer surface of the slide rod (15) is spirally wound with a spiral spring (14) at the position below the connecting horizontal plate (5), and the bottom end of the slide rod (15) is fixedly connected with a limiting block (13).

2. A jack-knife trailer arm assembly according to claim 1, wherein: The upper surface of the L-shaped plate (1) is fixedly installed with a limiting ring (2) at the position below the trailer ball head (3), and the outer diameter of the limiting ring (2) is less than or equal to the inner diameter of the protective cover (10).

3. A jack-knife trailer arm assembly as claimed in claim 2, wherein: The outer diameter of the limiting ring (2) is greater than the outer diameter of the trailer ball head (3).

4. A jack-knife trailer arm assembly as claimed in claim 1, wherein: The upper surface of the connecting horizontal plate (5) is provided with a limiting groove (12).

5. A jack-knife trailer arm assembly as claimed in claim 1, wherein: The upper surface of the L-shaped plate (1) is fixedly installed with a first reinforcing rib (4) at the corner position.

6. A jack-knife trailer arm assembly as claimed in claim 1, wherein: The outer surface of the connecting horizontal plate (5) is fixedly connected with a fixed installation plate (6) on the side away from the L-shaped plate (1), and the outer surface of the fixed installation plate (6) is provided with a fixed hole (8) near the four corner positions.

7. A jack-knife trailer arm assembly as claimed in claim 6, wherein: The upper and lower surfaces of the connecting horizontal plate (5) and the fixed installation plate (6) are both fixedly installed with a second reinforcing rib (7) at the connection positions.

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