阅读说明：本技术 一种内翻盖拖车钩 (Inner flip cover trailer hook ) 是由 唐刚 于 2020-07-31 设计创作，主要内容包括：本发明公开了一种内翻盖拖车钩。包括U形臂体、上盖、拖球、以及设置于主臂前端的扩展插孔,內翻式上盖解决了上翻式上盖可能与汽车后背悬挂物干涉的问题,拖球采用可拆球套的方式可以快速更换,能适应不同房车的牵引需求,前端的扩展插孔可加插其他拖吊设备,进一步拓展了使用范围。(The invention discloses an inner flip cover trailer hook. Including the U-shaped arm body, upper cover, drag the ball and set up in the extension jack of main arm front end, the problem that upturning formula upper cover probably hung the thing with the car back and interfered has been solved to the formula upper cover of turning over inwards, and the mode that drags the ball cover that adopts removable ball can quick replacement, can adapt to the demand of pulling of different cars as a house, and other equipment of dragging of can additionally inserting of extension jack at front end have further expanded application range.)

1. The utility model provides an interior flip cover tow hook, includes the U-shaped arm body, upper cover, drags the ball and sets up in the extension jack of main arm front end, its characterized in that, the upper cover can be on the U-shaped arm body lateral slip limited distance and can to the internal side of U-shaped arm turns over and locks or removes the locking, drag the ball with cross round pin tenon mode erection joint in on the U-shaped arm body, still include, U-shaped arm body rear end is provided with the mounting base.

2. The inside flap trailer hook according to claim 1, characterized in that: the inner side of the upper cover I is provided with a positioned upper cover ratchet, the U-shaped arm body is provided with a lifting lug for installing and connecting the upper cover, one side of the lifting lug, which corresponds to the upper cover ratchet, is provided with a lifting lug ratchet opposite to the upper cover ratchet, the U-shaped arm body is also provided with a locking transverse pin, the upper cover is hinged with the U-shaped arm body by penetrating the lifting lug through the locking transverse pin, a torsion spring is arranged on the locking transverse pin, and provides lateral thrust and radial torsion for the upper cover at the same time, so that the upper cover can be radially and axially reset in a releasing and turning state, and the locking transverse pin can drive the upper cover to axially slide in a lifting lug limiting range.

3. The inside flap trailer hook according to claim 1, characterized in that: the utility model discloses a drag ball, including U-shaped arm body, drag ball pole upper portion, be provided with the pole of dragging the ball on the U-shaped arm body, drag ball pole upper portion is provided with the screw hole that link up, be provided with the horizontal counter bore that the installation is sunk and is corresponded with the pole of dragging the ball pole through screw hole position on the drag ball, drag ball installation is sunk and is lived the pole of dragging the ball, and the horizontal counter bore of drag ball and the pole of dragging the ball are link up the screw hole with holding.

4. The inside flap trailer hook according to any one of claims 2-3, wherein: the mounting base can be in a flange form or a quick-insertion square tube form so as to meet the mounting requirements of different vehicle types.

Technical Field

The invention belongs to the technical field of mechanical design and manufacture, particularly belongs to the technical field of design and manufacture of automobile parts, and particularly relates to an inner flip cover towing hook for automobile traction and rescue.

Background

The trailer hook is a hanging part and a hoisting part, one end of the trailer hook is fixed on a trailer bar of an automobile chassis, and the other end of the trailer hook is provided with a specific traction joint or interface or plays a role in connection. The device is mainly used for connecting and towing trailers, fault vehicles, other vehicles needing to be towed, and hanging and carrying articles.

Patents CN304340381S and CN304349007S disclose related tow hooks respectively.

The basic structures of the above patents are similar, and the two types of the towing hook are a U-shaped bearing towing hook with a mounting base, and an upper cover which can be opened and closed is arranged above an opening of the U-shaped towing hook to form the towing hook. However, the patent technologies of this type all have the following technical problems: when upwards opening the upper cover and using the towing hook, the upper cover probably interferes with the spare tire, the spare oil tank, the rescue tool or other appliances hung on the back of the automobile, so that the upper cover cannot be normally opened, the execution of a towing task is hindered, secondly, trailer balls suitable for different towing purposes are replaced, a large-scale special tool is needed, the replacement is not convenient and fast, thirdly, the upper cover is not integrated and used for rapidly inserting and hanging a U-shaped shackle (a special standard lifting tool for rescuing and hoisting) or other rescue towing tools and a standard jack of a lifting tool, the implementation of a complex towing task is not convenient, and fourthly, the upper cover locking mechanism is complex in arrangement and is not beneficial to reducing the manufacturing, installation cost and lifting efficiency.

Disclosure of Invention

The invention aims to: aiming at the problems in the prior art, the trailer hook is simple in structure, has an inward turning cover function, can quickly replace towing balls with different standards and integrate expansion jacks of other lifting appliance towing tools, and solves the problems that interference can occur with a hanging object on the back of an automobile, different traction purposes can be quickly responded, and the traction and rescue functions can be expanded.

The invention is realized by the following technical scheme:

the inner flip cover towing hook comprises a U-shaped arm body provided with a mounting base, an upper cover, a towing ball and an expansion jack arranged at the front end of a main arm.

The upper cover is characterized in that an upper cover ratchet at a locking position is arranged on the inner side of the upper cover, a lifting lug used for installing an upper cover is arranged on the U-shaped arm body, a lifting lug ratchet opposite to the upper cover ratchet is arranged on one side, corresponding to the upper cover ratchet, of the lifting lug, the upper cover is hinged with the U-shaped arm body through a transverse locking pin penetrating through the lifting lug, a torsion spring is arranged on the transverse locking pin, a pin sleeve is arranged at one end of the transverse locking pin, two ends of the torsion spring respectively support the lifting lug and the pin sleeve, lateral thrust and radial torsion are provided for the upper cover, the upper cover can be turned inwards and locked on the U-shaped arm body by taking the transverse locking pin as an axis, and the transverse locking pin drives the upper cover to axially slide within a limiting range of the lifting lug.

The utility model discloses a ball towing device, including U-shaped arm body, tow ball pole, horizontal counter bore, tow ball pole through-hole, the U-shaped arm body is last to be provided with the tow ball pole, and tow ball pole upper portion is provided with the through-hole, be provided with the horizontal counter bore that the installation nest and the screw hole position of having a perfect understanding correspond with the tow ball on the tow ball, tow ball installation nest entangles the tow ball pole, and the horizontal counter bore of tow ball and tow ball pole through-hole are passed to reuse holding screw to with the mode.

The front end of the U-shaped arm body is provided with a universal towing and lifting appliance expansion jack, so that the quick installation of other rescue and towing lifting appliances is facilitated.

The U-shaped arm body is fixedly connected to the upper surface of the trailer bar at the rear part of the automobile through a screw for the mounting base.

The invention has the beneficial effects that:

in the invention, the upper cover can be turned inwards on the U-shaped arm body by taking the cross locking pin as an axis, when the upper cover is in a release state and forms a closed ring with the U-shaped arm body, rescue and traction cables can be effectively prevented from falling off, when a house vehicle provided with a towing ball cover needs to be towed, the upper cover is pressed towards the inner side of the U-shaped arm body and is driven by the torsion spring, the lifting lug ratchet and the upper cover ratchet relatively slide along the ratchet inclined plane until the upper cover is meshed to keep the upper cover in a turning and folding state, the purpose that the towing ball is not interfered with other hanging objects on the back of the automobile in the turning and folding process of the upper cover is achieved to enable the towing ball to be in a working state, lateral thrust is applied to the upper cover along the ratchet direction, the upper cover can slide, so that the ratchet meshing state is released, the upper cover is restored to the release state under the torsion acting force of the torsion spring, and the locking and the positioning of, the special locking part does not need to be additionally arranged on the upper cover like the traditional towing hook, and the purposes of simplifying the structure, simplifying the operation and reducing the manufacturing cost are achieved.

In the invention, the towing ball is installed and connected to the upper part of the towing ball rod in a way of installing the sinking nest nesting and the transverse lock, so that the towing ball can be quickly disassembled and replaced without a large special tool, and the towing balls with different specifications can be quickly replaced to adapt to different towing requirements.

In the invention, the front end of the U-shaped arm body is provided with the universal lifting appliance expansion jack, so that the quick installation of other rescue and traction lifting appliances is facilitated, the quick response to different traction and rescue requirements is realized, and the quick installation of a third-party expansion functional part is facilitated, thereby achieving the purposes of multipurpose and multifunctional use.

Drawings

FIG. 1 is a front view structural diagram of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a left side view of the present invention;

FIG. 4 is a perspective view of the present invention;

FIG. 5 is a view of the present invention with the upper cover flipped inside;

FIG. 6 is an exploded view of the present invention;

FIG. 7 is a partial cross-sectional structural view of the assembly of the present invention;

FIG. 8 is a perspective view of the U-shaped arm of the present invention;

FIG. 9 is a view showing the inner structure of the upper cover according to the present invention;

FIG. 10 is a perspective view of a tow ball according to the present invention;

FIG. 11 is a perspective view of a torsion spring in accordance with the present invention;

FIG. 12 is a schematic view of the torsional spring and the locking pin of the present invention;

FIG. 13 is a view showing a state where the upper cover is released according to the present invention;

FIG. 14 is a schematic view of the folding process of the present invention;

FIG. 15 is a schematic view of the upper lid of the present invention folded and positioned;

FIG. 16 shows example 2 of the present invention;

FIG. 17 shows example 3 of the present invention;

FIG. 18 shows example 4 of the present invention;

FIG. 19 shows example 5 of the present invention;

FIG. 20 shows example 6 of the present invention;

FIG. 21 shows example 7 of the present invention.

Wherein, 1 is a U-shaped arm body; 11-a tow ball rod; 111-the tow ball rod runs through the screw hole; 12-an expansion jack; 13-mounting a base; 14-a lifting lug; 141-lifting lug ratchet; 2, dragging a ball; 21, installing a sinking nest on the towing ball; 22-transverse counter bore of drag ball; 3, covering the upper cover; 31, mounting a through hole on the upper cover; 32-upper cover ratchet; 33-pair of lock cross pins; 331-pin bush; 4-torsion compression spring; 41-spring torsion arm; 5, tightening the screw; 6-existing standard mopping tool.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention is described in detail by the following embodiments, which are only used for further illustration of the present invention, but not to be construed as limiting the scope of the present invention, and the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure also belong to the scope of the present invention.

With reference to fig. 1 to 21: