A multifunctional trailer ball

Abstract

The present invention discloses a multifunctional trailer ball. It includes a rod body, a towing ring, a hemispherical body, a flange and a screw rod. The hemispherical body buckles the towing ring to form a complete trailer ball for towing a caravan. When the hemispherical body is removed, a universal shackle or a lifting ring can be inserted and hung, achieving the purpose of multifunctional use of both towing a caravan and towing for rescue.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical design and manufacturing, especially to the technical field of automotive parts design and manufacturing, and particularly relates to a multi-functional trailer ball for towing a trailer caravan, automotive traction, and rescue. Background Art

[0002] A trailer ball is a component with a spherical structure installed on the trailer hitch at the rear end of an automobile and used to connect a trailer caravan or other towed vehicles such as a motorboat, motorcycle, bicycle, etc. It nests and cooperates with the trailer ball cover of the towed vehicle or caravan to form a freely movable articulated connection structure, so as to achieve the purpose that the towed vehicle can turn flexibly with the towing vehicle during driving.

[0003] Patents with publication numbers CN209426493U, CN305644833S, CN206124643U, etc. have respectively disclosed trailer ball solutions.

[0004] Some of the above patents have single functions, and some provide solutions for replacing trailer balls of different specifications. However, all such patented technologies cannot simultaneously solve the following technical problems: being able to replace trailer balls of different specifications, providing a universal socket for third-party towing and lifting tools, facilitating the quick insertion and hanging of universal shackles and lifting rings to meet the vehicle rescue connection requirements under specific conditions, being convenient to replace, having a simple structure, and being easy to manufacture at low cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a trailer ball that can quickly replace trailer balls of different specifications and can quickly insert and hang towing and lifting tools such as universal shackles and lifting rings to quickly respond to different traction and rescue requirements in view of the problems existing in the prior art.

[0006] The present invention is realized through the following technical solutions:

[0007] The multi-functional trailer ball includes a rod body, a towing ring, hemispheres, a flange, and a screw rod. It is characterized in that: the towing ring is arranged at the top end of the rod body, and the two hemispheres are symmetrically arranged on both sides of the towing ring with the center point of the towing ring as the reference. The towing ring is fastened by set screws to form a complete trailer ball sphere for towing a trailer caravan. After removing the hemispheres, the towing ring arranged at the upper end of the rod body is exposed for inserting and hanging a universal shackle and a lifting ring for traction and vehicle rescue.

[0008] The hemispheres are provided with wedge-shaped columns, and a semi-cone hole is arranged on the wedge surface of the wedge-shaped column, that is, one side of the hole is a tapered surface with a slope. In the installed state, the wedge-shaped columns of the two hemispheres are attached to each other with the wedge surfaces to form a cylinder adapted to the inner hole of the towing ring. At the same time, the semi-cone holes also combine into a cone hole, but the half-cone surfaces of each are in opposite directions, and as approaching the bottom of the cone hole, the distance between the half-cone surfaces of the semi-cone holes gradually decreases.

[0009] A set screw through-hole is provided at the top of the hemispherical body, and a set screw threaded hole is provided at the top of the towing ring. The two hemispherical bodies are fixed to the towing ring by screws passing through the screw through-hole, the set screw threaded hole, and the semi-conical hole.

[0010] An installation flange is provided at the lower end of the rod body, and a lead screw is provided at the bottom of the installation flange for firmly installing the multi-functional trailer ball on the towing arm body.

[0011] The beneficial effects of the present invention are as follows:

[0012] In the present invention, the towing ring is provided at the top end of the rod body, and the two hemispherical bodies are arranged symmetrically about the center on both sides of the towing ring. When the set screw is screwed downward, the semi-conical hole of the hemispherical wedge column is axially pushed toward the towing ring, causing the hemispherical body to axially tighten toward the towing ring. At the same time, during the axial inward tightening of the wedge column toward the towing ring, due to the action of the wedge surface, the wedge column expands radially toward the towing ring and presses against the inner wall of the inner hole of the towing ring, so that the two hemispherical bodies are fastened on both sides of the towing ring, completely clamping the towing ring to form a complete trailer ball for towing a caravan. After removing the hemispherical body, the towing ring provided at the upper end of the rod body is exposed for inserting a universal shackle and a lifting ring for towing and vehicle rescue. The purpose of being able to replace hemispherical bodies with different standard ball diameters and at the same time being able to add other towing, traction, and rescue equipment at any time is achieved. Further, the installation method of the hemispherical body is similar to the principle of a cement expansion screw, forming a very firm pre-tightening installation mode, enabling the trailer ball to obtain a firm pre-stress and a greater bearing capacity. The components of the trailer ball have a simple structure and a small number, and the rod body and the hemispherical body can be conveniently prepared by forging and casting, achieving a significant reduction in manufacturing cost on the basis of realizing multi-functionality. Description of the Drawings

[0013] Figure 1 It is the front view structure diagram of the present invention;

[0014] Figure 2 It is the three-dimensional structure diagram of the present invention;

[0015] Figure 3 It is the disassembly schematic diagram of the present invention;

[0016] Figure 4 It is the partial sectional view of the assembly of the present invention;

[0017] Figure 5 It is the horizontal sectional view of the assembly of the present invention;

[0018] Figure 6 It is the sectional view of the assembly of the hemispherical body of the present invention;

[0019] Figure 7 It is the top view of the assembly of the trailer ball and the hemispherical body of the present invention;

[0020] Figure 8 This is the front view of the towing ball hemisphere of the present invention;

[0021] Figure 9 This is the top view of the towing ball hemisphere of the present invention;

[0022] Figure 10 This is the three-dimensional view of the towing ball hemisphere of the present invention;

[0023] Figure 11 This is the three-dimensional view of the towing rod body of the present invention;

[0024] Figure 12 This is the three-dimensional view of Embodiment 2 of the present invention;

[0025] Figure 13 This is the loading and unloading diagram of Embodiment 2 of the present invention;

[0026] Figure 14 This is the schematic diagram of Embodiment 3 of the present invention;

[0027] Figure 15 This is the sectional view of Embodiment 3 of the present invention;

[0028] Figure 16 This is the three-dimensional view of Embodiment 4 of the present invention;

[0029] Figure 17 This is the three-dimensional view of Embodiment 5 of the present invention;

[0030] Figure 18 This is the three-dimensional view of Embodiment 6 of the present invention;

[0031] Figure 19 This is the three-dimensional view of Embodiment 7 of the present invention;

[0032] Figure 20 This is the three-dimensional view of Embodiment 8 of the present invention;

[0033] Figure 21 This is the three-dimensional view of Embodiment 9 of the present invention

[0034] Figure 22 This is the three-dimensional view of Embodiment 10 of the present invention.

[0035] Among them, 1 - rod body; 11 - towing ring; 111 - inner hole of towing ring; 12 - flange; 13 - screw rod; 14 - set screw hole; 2 - hemisphere; 21 - wedge-shaped column; 211 - semi-tapered hole; 212 - wedge surface; 22 - screw through hole; 3 - set screw; 4 - towing ball nut; 5 - standard lifting ring; 6 - trailer arm body. Specific embodiments

[0036] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The present invention will be specifically described below through embodiments. These embodiments are only used to further illustrate the present invention, but should not be construed as limiting the protection scope of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention also fall within the protection scope of the present invention.

[0038] Combined with Figures 1 to 21 。

[0039] Embodiment 1

[0040] A multifunctional trailer ball, as shown in the figure, includes a rod body 1, a towing ring 11, a hemispherical body 2, a flange 12, and a lead screw 13, and is characterized in that: the towing ring 11 is arranged at the top end of the rod body 1; the two hemispherical bodies 2 are arranged on both sides of the towing ring 11 in a centrosymmetric layout; a wedge-shaped column 21 is arranged on the hemispherical body 2; a semi-cone hole 211 is arranged on the wedge surface 212 of the wedge-shaped column 21, that is, one side of the hole is a tapered surface with a slope. In the installed state, the wedge-shaped columns 21 of the two hemispherical bodies 2 are attached with the wedge surfaces 212 to form a cylinder adapted to the inner hole 111 of the towing ring, and at the same time, the semi-cone holes 211 also form a cone hole, but the directions of their respective half-cone surfaces are opposite, and as approaching the bottom of the cone hole, the distance between the half-cone surfaces of the semi-cone holes 211 gradually decreases.

[0041] A set screw through hole 22 is arranged at the top of the hemispherical body 2, and a set screw threaded hole 14 is arranged at the top of the towing ring 11.

[0042] When the set screw 3 is screwed downward, the cone surface of the semi-cone hole 211 of the wedge-shaped column of the hemispherical body is axially pushed towards the towing ring 11, so that the hemispherical body 2 is axially tightened towards the towing ring 11. At the same time, during the axial inward tightening of the wedge-shaped column 21 towards the towing ring 11, due to the action of the wedge surface 212, the wedge-shaped column 21 radially expands towards the towing ring 11 inside the inner hole 111 of the towing ring, and abuts against the inner wall of the inner hole 111 of the towing ring, so that the two hemispherical bodies 2 are fastened on both sides of the towing ring 11, completely fastening the towing ring to form a complete trailer ball for towing a caravan.

[0043] The lower end of the rod body 1 is provided with a mounting flange 12, and a lead screw 13 is provided at the bottom of the mounting flange. The multi-functional trailer ball is fixedly installed on the tow arm body 6 with a nut 4.

[0044] Embodiment 2

[0045] After removing the hemispherical body 2, the towing ring 11 provided at the upper end of the rod body 1 is exposed, which is used for inserting and hanging a universal shackle 5 and a lifting ring 5 for traction and vehicle rescue.

[0046] Embodiment 3

[0047] As Figures 14 - 15 shown, for applications with low requirements for installation accuracy and mechanics, the wedge-shaped column 11 can be simplified into a complete cylinder, and the set screw holes are directly provided on the cylinder 11. The two hemispherical bodies 2 are directly clamped and fixed on the towing ring 11 axially through screws 3. This simplified solution can further reduce the manufacturing cost.

[0048] Embodiment 4

[0049] As Figure 16 shown, the mounting lead screw 13 of the trailer ball can be changed to a pin-hole quick-insert form according to the installation needs.

[0050] Embodiment 5

[0051] As Figure 17 shown, the trailer ball can be installed on the universal trailer tiger-head hook arm body 6.

[0052] Embodiment 6

[0053] As Figure 18 shown, the trailer ball enables the universal tiger-head hook arm body 6 to be able to add and hang a universal lifting ring 5.

[0054] Embodiment 7

[0055] As Figure 19 shown, the trailer ball is integrally integrated on the universal trailer tiger-head hook arm body 6.

[0056] Embodiment 8

[0057] As Figure 20 shown, the trailer ball can be installed on the universal quick-insert arm body 6.

[0058] Embodiment 9

[0059] As Figure 21 shown, the trailer ball enables the universal quick-insert arm 6 to add and hang a universal lifting ring 5.

[0060] Embodiment 10

[0061] As Figure 22 shown, the trailer ball is integrally integrated on the universal quick-insert arm 6.

Claims

1. A multi-functional trailer ball, comprising a rod body, a towing ring, a hemispherical body, a flange and a lead screw, Characterized in that: The towing ring is arranged at the top end of the rod body. Two hemispherical bodies are symmetrically arranged on both sides of the towing ring with the center point of the towing ring as the reference, and are buckled on the towing ring to form a spherical body. Wedged columns are arranged on both of the two hemispherical bodies. A semi-cone hole is arranged on the wedge surface of the wedged column. One side of the semi-cone hole is a tapered surface with a slope. In the installed state, the wedged columns of the two hemispherical bodies are attached to each other with the wedge surfaces to form a cylinder adapted to the inner hole of the towing ring. At the same time, the semi-cone holes also combine into a cone hole, but the directions of their respective half-cone surfaces are opposite, and as approaching the bottom of the cone hole, the distance between the half-cone surfaces of the semi-cone holes gradually decreases. Through holes for set screws are arranged at the tops of the two hemispherical bodies, and threaded holes for set screws are arranged at the top of the towing ring. The two hemispherical bodies are fixed on the towing ring by screws passing through the through holes for set screws, the threaded holes for set screws and the semi-cone holes. An installation flange is arranged at the lower end of the rod body, and a lead screw is arranged at the bottom of the installation flange.

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